1dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//===-- AArch64ISelLowering.cpp - AArch64 DAG Lowering Implementation  ----===//
272062f5744557e270a38192554c3126ea5f97434Tim Northover//
372062f5744557e270a38192554c3126ea5f97434Tim Northover//                     The LLVM Compiler Infrastructure
472062f5744557e270a38192554c3126ea5f97434Tim Northover//
572062f5744557e270a38192554c3126ea5f97434Tim Northover// This file is distributed under the University of Illinois Open Source
672062f5744557e270a38192554c3126ea5f97434Tim Northover// License. See LICENSE.TXT for details.
772062f5744557e270a38192554c3126ea5f97434Tim Northover//
872062f5744557e270a38192554c3126ea5f97434Tim Northover//===----------------------------------------------------------------------===//
972062f5744557e270a38192554c3126ea5f97434Tim Northover//
10dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// This file implements the AArch64TargetLowering class.
1172062f5744557e270a38192554c3126ea5f97434Tim Northover//
1272062f5744557e270a38192554c3126ea5f97434Tim Northover//===----------------------------------------------------------------------===//
1372062f5744557e270a38192554c3126ea5f97434Tim Northover
1472062f5744557e270a38192554c3126ea5f97434Tim Northover#include "AArch64ISelLowering.h"
15dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines#include "AArch64PerfectShuffle.h"
16dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines#include "AArch64Subtarget.h"
1772062f5744557e270a38192554c3126ea5f97434Tim Northover#include "AArch64MachineFunctionInfo.h"
1872062f5744557e270a38192554c3126ea5f97434Tim Northover#include "AArch64TargetMachine.h"
1972062f5744557e270a38192554c3126ea5f97434Tim Northover#include "AArch64TargetObjectFile.h"
20dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines#include "MCTargetDesc/AArch64AddressingModes.h"
21dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines#include "llvm/ADT/Statistic.h"
2272062f5744557e270a38192554c3126ea5f97434Tim Northover#include "llvm/CodeGen/CallingConvLower.h"
2372062f5744557e270a38192554c3126ea5f97434Tim Northover#include "llvm/CodeGen/MachineFrameInfo.h"
2472062f5744557e270a38192554c3126ea5f97434Tim Northover#include "llvm/CodeGen/MachineInstrBuilder.h"
2572062f5744557e270a38192554c3126ea5f97434Tim Northover#include "llvm/CodeGen/MachineRegisterInfo.h"
26dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines#include "llvm/IR/Function.h"
27dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines#include "llvm/IR/Intrinsics.h"
28dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines#include "llvm/IR/Type.h"
29dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines#include "llvm/Support/CommandLine.h"
30dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines#include "llvm/Support/Debug.h"
31dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines#include "llvm/Support/ErrorHandling.h"
32dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines#include "llvm/Support/raw_ostream.h"
33dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines#include "llvm/Target/TargetOptions.h"
3472062f5744557e270a38192554c3126ea5f97434Tim Northoverusing namespace llvm;
3572062f5744557e270a38192554c3126ea5f97434Tim Northover
36dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines#define DEBUG_TYPE "aarch64-lower"
3772062f5744557e270a38192554c3126ea5f97434Tim Northover
38dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSTATISTIC(NumTailCalls, "Number of tail calls");
39dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSTATISTIC(NumShiftInserts, "Number of vector shift inserts");
40dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
41dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesenum AlignMode {
42dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  StrictAlign,
43dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  NoStrictAlign
44dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines};
45dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
46dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic cl::opt<AlignMode>
47dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesAlign(cl::desc("Load/store alignment support"),
48dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      cl::Hidden, cl::init(NoStrictAlign),
49dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      cl::values(
50dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          clEnumValN(StrictAlign,   "aarch64-strict-align",
51dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                     "Disallow all unaligned memory accesses"),
52dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          clEnumValN(NoStrictAlign, "aarch64-no-strict-align",
53dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                     "Allow unaligned memory accesses"),
54dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          clEnumValEnd));
55dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
56dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// Place holder until extr generation is tested fully.
57dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic cl::opt<bool>
58dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesEnableAArch64ExtrGeneration("aarch64-extr-generation", cl::Hidden,
59dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                          cl::desc("Allow AArch64 (or (shift)(shift))->extract"),
60dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                          cl::init(true));
61dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
62dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic cl::opt<bool>
63dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesEnableAArch64SlrGeneration("aarch64-shift-insert-generation", cl::Hidden,
64dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                         cl::desc("Allow AArch64 SLI/SRI formation"),
65dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                         cl::init(false));
66dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
67dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//===----------------------------------------------------------------------===//
68dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// AArch64 Lowering public interface.
69dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//===----------------------------------------------------------------------===//
70cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hinesstatic TargetLoweringObjectFile *createTLOF(const Triple &TT) {
71cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines  if (TT.isOSBinFormatMachO())
72dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return new AArch64_MachoTargetObjectFile();
7372062f5744557e270a38192554c3126ea5f97434Tim Northover
74dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return new AArch64_ELFTargetObjectFile();
75dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
7687773c318fcee853fb34a80a10c4347d523bdafbTim Northover
77cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen HinesAArch64TargetLowering::AArch64TargetLowering(TargetMachine &TM)
78cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines    : TargetLowering(TM, createTLOF(Triple(TM.getTargetTriple()))) {
79dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Subtarget = &TM.getSubtarget<AArch64Subtarget>();
80dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
81dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // AArch64 doesn't have comparisons which set GPRs or setcc instructions, so
82dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // we have to make something up. Arbitrarily, choose ZeroOrOne.
83dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setBooleanContents(ZeroOrOneBooleanContent);
84dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // When comparing vectors the result sets the different elements in the
85dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // vector to all-one or all-zero.
8672062f5744557e270a38192554c3126ea5f97434Tim Northover  setBooleanVectorContents(ZeroOrNegativeOneBooleanContent);
8772062f5744557e270a38192554c3126ea5f97434Tim Northover
88dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Set up the register classes.
89dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  addRegisterClass(MVT::i32, &AArch64::GPR32allRegClass);
90dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  addRegisterClass(MVT::i64, &AArch64::GPR64allRegClass);
91c2884320feebc543d2ce51151d5418dfc18da9e4Amara Emerson
92c2884320feebc543d2ce51151d5418dfc18da9e4Amara Emerson  if (Subtarget->hasFPARMv8()) {
93c2884320feebc543d2ce51151d5418dfc18da9e4Amara Emerson    addRegisterClass(MVT::f16, &AArch64::FPR16RegClass);
94c2884320feebc543d2ce51151d5418dfc18da9e4Amara Emerson    addRegisterClass(MVT::f32, &AArch64::FPR32RegClass);
95c2884320feebc543d2ce51151d5418dfc18da9e4Amara Emerson    addRegisterClass(MVT::f64, &AArch64::FPR64RegClass);
96c2884320feebc543d2ce51151d5418dfc18da9e4Amara Emerson    addRegisterClass(MVT::f128, &AArch64::FPR128RegClass);
97c2884320feebc543d2ce51151d5418dfc18da9e4Amara Emerson  }
9872062f5744557e270a38192554c3126ea5f97434Tim Northover
9987773c318fcee853fb34a80a10c4347d523bdafbTim Northover  if (Subtarget->hasNEON()) {
100dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    addRegisterClass(MVT::v16i8, &AArch64::FPR8RegClass);
101dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    addRegisterClass(MVT::v8i16, &AArch64::FPR16RegClass);
102dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Someone set us up the NEON.
103dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    addDRTypeForNEON(MVT::v2f32);
104dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    addDRTypeForNEON(MVT::v8i8);
105dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    addDRTypeForNEON(MVT::v4i16);
106dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    addDRTypeForNEON(MVT::v2i32);
107dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    addDRTypeForNEON(MVT::v1i64);
108dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    addDRTypeForNEON(MVT::v1f64);
109dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
110dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    addQRTypeForNEON(MVT::v4f32);
111dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    addQRTypeForNEON(MVT::v2f64);
112dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    addQRTypeForNEON(MVT::v16i8);
113dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    addQRTypeForNEON(MVT::v8i16);
114dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    addQRTypeForNEON(MVT::v4i32);
115dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    addQRTypeForNEON(MVT::v2i64);
11687773c318fcee853fb34a80a10c4347d523bdafbTim Northover  }
11787773c318fcee853fb34a80a10c4347d523bdafbTim Northover
118dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Compute derived properties from the register classes
11972062f5744557e270a38192554c3126ea5f97434Tim Northover  computeRegisterProperties();
12072062f5744557e270a38192554c3126ea5f97434Tim Northover
121dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Provide all sorts of operation actions
12272062f5744557e270a38192554c3126ea5f97434Tim Northover  setOperationAction(ISD::GlobalAddress, MVT::i64, Custom);
12372062f5744557e270a38192554c3126ea5f97434Tim Northover  setOperationAction(ISD::GlobalTLSAddress, MVT::i64, Custom);
124dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::SETCC, MVT::i32, Custom);
125dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::SETCC, MVT::i64, Custom);
126dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::SETCC, MVT::f32, Custom);
127dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::SETCC, MVT::f64, Custom);
128dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::BRCOND, MVT::Other, Expand);
12972062f5744557e270a38192554c3126ea5f97434Tim Northover  setOperationAction(ISD::BR_CC, MVT::i32, Custom);
13072062f5744557e270a38192554c3126ea5f97434Tim Northover  setOperationAction(ISD::BR_CC, MVT::i64, Custom);
13172062f5744557e270a38192554c3126ea5f97434Tim Northover  setOperationAction(ISD::BR_CC, MVT::f32, Custom);
13272062f5744557e270a38192554c3126ea5f97434Tim Northover  setOperationAction(ISD::BR_CC, MVT::f64, Custom);
13372062f5744557e270a38192554c3126ea5f97434Tim Northover  setOperationAction(ISD::SELECT, MVT::i32, Custom);
13472062f5744557e270a38192554c3126ea5f97434Tim Northover  setOperationAction(ISD::SELECT, MVT::i64, Custom);
13572062f5744557e270a38192554c3126ea5f97434Tim Northover  setOperationAction(ISD::SELECT, MVT::f32, Custom);
13672062f5744557e270a38192554c3126ea5f97434Tim Northover  setOperationAction(ISD::SELECT, MVT::f64, Custom);
13772062f5744557e270a38192554c3126ea5f97434Tim Northover  setOperationAction(ISD::SELECT_CC, MVT::i32, Custom);
13872062f5744557e270a38192554c3126ea5f97434Tim Northover  setOperationAction(ISD::SELECT_CC, MVT::i64, Custom);
13972062f5744557e270a38192554c3126ea5f97434Tim Northover  setOperationAction(ISD::SELECT_CC, MVT::f32, Custom);
14072062f5744557e270a38192554c3126ea5f97434Tim Northover  setOperationAction(ISD::SELECT_CC, MVT::f64, Custom);
14172062f5744557e270a38192554c3126ea5f97434Tim Northover  setOperationAction(ISD::BR_JT, MVT::Other, Expand);
14272062f5744557e270a38192554c3126ea5f97434Tim Northover  setOperationAction(ISD::JumpTable, MVT::i64, Custom);
14372062f5744557e270a38192554c3126ea5f97434Tim Northover
144dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::SHL_PARTS, MVT::i64, Custom);
145dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::SRA_PARTS, MVT::i64, Custom);
146dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::SRL_PARTS, MVT::i64, Custom);
14772062f5744557e270a38192554c3126ea5f97434Tim Northover
14872062f5744557e270a38192554c3126ea5f97434Tim Northover  setOperationAction(ISD::FREM, MVT::f32, Expand);
14972062f5744557e270a38192554c3126ea5f97434Tim Northover  setOperationAction(ISD::FREM, MVT::f64, Expand);
150dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::FREM, MVT::f80, Expand);
15172062f5744557e270a38192554c3126ea5f97434Tim Northover
152dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Custom lowering hooks are needed for XOR
153dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // to fold it into CSINC/CSINV.
154dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::XOR, MVT::i32, Custom);
155dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::XOR, MVT::i64, Custom);
15672062f5744557e270a38192554c3126ea5f97434Tim Northover
15772062f5744557e270a38192554c3126ea5f97434Tim Northover  // Virtually no operation on f128 is legal, but LLVM can't expand them when
15872062f5744557e270a38192554c3126ea5f97434Tim Northover  // there's a valid register class, so we need custom operations in most cases.
159dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::FABS, MVT::f128, Expand);
160dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::FADD, MVT::f128, Custom);
161dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::FCOPYSIGN, MVT::f128, Expand);
162dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::FCOS, MVT::f128, Expand);
163dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::FDIV, MVT::f128, Custom);
164dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::FMA, MVT::f128, Expand);
165dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::FMUL, MVT::f128, Custom);
166dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::FNEG, MVT::f128, Expand);
167dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::FPOW, MVT::f128, Expand);
168dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::FREM, MVT::f128, Expand);
169dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::FRINT, MVT::f128, Expand);
170dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::FSIN, MVT::f128, Expand);
171dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::FSINCOS, MVT::f128, Expand);
172dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::FSQRT, MVT::f128, Expand);
173dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::FSUB, MVT::f128, Custom);
174dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::FTRUNC, MVT::f128, Expand);
175dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::SETCC, MVT::f128, Custom);
176dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::BR_CC, MVT::f128, Custom);
177dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::SELECT, MVT::f128, Custom);
178dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::SELECT_CC, MVT::f128, Custom);
179dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::FP_EXTEND, MVT::f128, Custom);
18072062f5744557e270a38192554c3126ea5f97434Tim Northover
18172062f5744557e270a38192554c3126ea5f97434Tim Northover  // Lowering for many of the conversions is actually specified by the non-f128
18272062f5744557e270a38192554c3126ea5f97434Tim Northover  // type. The LowerXXX function will be trivial when f128 isn't involved.
18372062f5744557e270a38192554c3126ea5f97434Tim Northover  setOperationAction(ISD::FP_TO_SINT, MVT::i32, Custom);
18472062f5744557e270a38192554c3126ea5f97434Tim Northover  setOperationAction(ISD::FP_TO_SINT, MVT::i64, Custom);
18572062f5744557e270a38192554c3126ea5f97434Tim Northover  setOperationAction(ISD::FP_TO_SINT, MVT::i128, Custom);
18672062f5744557e270a38192554c3126ea5f97434Tim Northover  setOperationAction(ISD::FP_TO_UINT, MVT::i32, Custom);
18772062f5744557e270a38192554c3126ea5f97434Tim Northover  setOperationAction(ISD::FP_TO_UINT, MVT::i64, Custom);
18872062f5744557e270a38192554c3126ea5f97434Tim Northover  setOperationAction(ISD::FP_TO_UINT, MVT::i128, Custom);
18972062f5744557e270a38192554c3126ea5f97434Tim Northover  setOperationAction(ISD::SINT_TO_FP, MVT::i32, Custom);
19072062f5744557e270a38192554c3126ea5f97434Tim Northover  setOperationAction(ISD::SINT_TO_FP, MVT::i64, Custom);
19172062f5744557e270a38192554c3126ea5f97434Tim Northover  setOperationAction(ISD::SINT_TO_FP, MVT::i128, Custom);
19272062f5744557e270a38192554c3126ea5f97434Tim Northover  setOperationAction(ISD::UINT_TO_FP, MVT::i32, Custom);
19372062f5744557e270a38192554c3126ea5f97434Tim Northover  setOperationAction(ISD::UINT_TO_FP, MVT::i64, Custom);
19472062f5744557e270a38192554c3126ea5f97434Tim Northover  setOperationAction(ISD::UINT_TO_FP, MVT::i128, Custom);
195dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::FP_ROUND, MVT::f32, Custom);
196dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::FP_ROUND, MVT::f64, Custom);
19772062f5744557e270a38192554c3126ea5f97434Tim Northover
198dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Variable arguments.
199dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::VASTART, MVT::Other, Custom);
200dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::VAARG, MVT::Other, Custom);
201dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::VACOPY, MVT::Other, Custom);
202dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::VAEND, MVT::Other, Expand);
20372062f5744557e270a38192554c3126ea5f97434Tim Northover
204dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Variable-sized objects.
205dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
206dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
207dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i64, Expand);
20872062f5744557e270a38192554c3126ea5f97434Tim Northover
209dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Exception handling.
210dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // FIXME: These are guesses. Has this been defined yet?
21172062f5744557e270a38192554c3126ea5f97434Tim Northover  setExceptionPointerRegister(AArch64::X0);
21272062f5744557e270a38192554c3126ea5f97434Tim Northover  setExceptionSelectorRegister(AArch64::X1);
21387773c318fcee853fb34a80a10c4347d523bdafbTim Northover
214dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Constant pool entries
215dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::ConstantPool, MVT::i64, Custom);
21636b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
217dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // BlockAddress
218dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::BlockAddress, MVT::i64, Custom);
21936b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
220dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Add/Sub overflow ops with MVT::Glues are lowered to NZCV dependences.
221dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::ADDC, MVT::i32, Custom);
222dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::ADDE, MVT::i32, Custom);
223dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::SUBC, MVT::i32, Custom);
224dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::SUBE, MVT::i32, Custom);
225dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::ADDC, MVT::i64, Custom);
226dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::ADDE, MVT::i64, Custom);
227dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::SUBC, MVT::i64, Custom);
228dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::SUBE, MVT::i64, Custom);
229dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
230dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // AArch64 lacks both left-rotate and popcount instructions.
231dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::ROTL, MVT::i32, Expand);
232dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::ROTL, MVT::i64, Expand);
23336b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
234dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // AArch64 doesn't have {U|S}MUL_LOHI.
235dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::UMUL_LOHI, MVT::i64, Expand);
236dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::SMUL_LOHI, MVT::i64, Expand);
23736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
23836b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
239dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Expand the undefined-at-zero variants to cttz/ctlz to their defined-at-zero
240dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // counterparts, which AArch64 supports directly.
241dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i32, Expand);
242dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i32, Expand);
243dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i64, Expand);
244dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i64, Expand);
24572062f5744557e270a38192554c3126ea5f97434Tim Northover
246dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::CTPOP, MVT::i32, Custom);
247dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::CTPOP, MVT::i64, Custom);
24872062f5744557e270a38192554c3126ea5f97434Tim Northover
249dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::SDIVREM, MVT::i32, Expand);
250dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::SDIVREM, MVT::i64, Expand);
251dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::SREM, MVT::i32, Expand);
252dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::SREM, MVT::i64, Expand);
253dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::UDIVREM, MVT::i32, Expand);
254dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::UDIVREM, MVT::i64, Expand);
255dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::UREM, MVT::i32, Expand);
256dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::UREM, MVT::i64, Expand);
257211ffd242df8bacf4cbe034f5ca7545ab75b45dfTim Northover
258dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Custom lower Add/Sub/Mul with overflow.
259dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::SADDO, MVT::i32, Custom);
260dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::SADDO, MVT::i64, Custom);
261dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::UADDO, MVT::i32, Custom);
262dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::UADDO, MVT::i64, Custom);
263dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::SSUBO, MVT::i32, Custom);
264dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::SSUBO, MVT::i64, Custom);
265dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::USUBO, MVT::i32, Custom);
266dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::USUBO, MVT::i64, Custom);
267dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::SMULO, MVT::i32, Custom);
268dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::SMULO, MVT::i64, Custom);
269dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::UMULO, MVT::i32, Custom);
270dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::UMULO, MVT::i64, Custom);
271211ffd242df8bacf4cbe034f5ca7545ab75b45dfTim Northover
272dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::FSIN, MVT::f32, Expand);
273dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::FSIN, MVT::f64, Expand);
274dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::FCOS, MVT::f32, Expand);
275dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::FCOS, MVT::f64, Expand);
276dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::FPOW, MVT::f32, Expand);
277dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::FPOW, MVT::f64, Expand);
278dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::FCOPYSIGN, MVT::f64, Custom);
279dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom);
280dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
281dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // AArch64 has implementations of a lot of rounding-like FP operations.
282dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  static MVT RoundingTypes[] = { MVT::f32, MVT::f64};
283dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  for (unsigned I = 0; I < array_lengthof(RoundingTypes); ++I) {
284dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    MVT Ty = RoundingTypes[I];
285dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FFLOOR, Ty, Legal);
286dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FNEARBYINT, Ty, Legal);
287dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FCEIL, Ty, Legal);
288dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FRINT, Ty, Legal);
289dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FTRUNC, Ty, Legal);
290dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FROUND, Ty, Legal);
291dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
292211ffd242df8bacf4cbe034f5ca7545ab75b45dfTim Northover
293dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::PREFETCH, MVT::Other, Custom);
29472062f5744557e270a38192554c3126ea5f97434Tim Northover
295dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Subtarget->isTargetMachO()) {
296dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // For iOS, we don't want to the normal expansion of a libcall to
297dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // sincos. We want to issue a libcall to __sincos_stret to avoid memory
298dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // traffic.
299dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FSINCOS, MVT::f64, Custom);
300dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FSINCOS, MVT::f32, Custom);
301dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  } else {
302dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FSINCOS, MVT::f64, Expand);
303dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FSINCOS, MVT::f32, Expand);
304f04a4d74b86733b853b7445ab6d5a3bde025a30dBill Wendling  }
305f04a4d74b86733b853b7445ab6d5a3bde025a30dBill Wendling
306dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // AArch64 does not have floating-point extending loads, i1 sign-extending
307dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // load, floating-point truncating stores, or v2i32->v2i16 truncating store.
308dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setLoadExtAction(ISD::EXTLOAD, MVT::f32, Expand);
309dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setLoadExtAction(ISD::EXTLOAD, MVT::f64, Expand);
310dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setLoadExtAction(ISD::EXTLOAD, MVT::f80, Expand);
311dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setLoadExtAction(ISD::SEXTLOAD, MVT::i1, Expand);
312dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setTruncStoreAction(MVT::f32, MVT::f16, Expand);
313dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setTruncStoreAction(MVT::f64, MVT::f32, Expand);
314dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setTruncStoreAction(MVT::f64, MVT::f16, Expand);
315dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setTruncStoreAction(MVT::f128, MVT::f80, Expand);
316dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setTruncStoreAction(MVT::f128, MVT::f64, Expand);
317dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setTruncStoreAction(MVT::f128, MVT::f32, Expand);
318dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setTruncStoreAction(MVT::f128, MVT::f16, Expand);
319dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Indexed loads and stores are supported.
320dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  for (unsigned im = (unsigned)ISD::PRE_INC;
321dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines       im != (unsigned)ISD::LAST_INDEXED_MODE; ++im) {
322dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setIndexedLoadAction(im, MVT::i8, Legal);
323dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setIndexedLoadAction(im, MVT::i16, Legal);
324dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setIndexedLoadAction(im, MVT::i32, Legal);
325dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setIndexedLoadAction(im, MVT::i64, Legal);
326dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setIndexedLoadAction(im, MVT::f64, Legal);
327dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setIndexedLoadAction(im, MVT::f32, Legal);
328dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setIndexedStoreAction(im, MVT::i8, Legal);
329dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setIndexedStoreAction(im, MVT::i16, Legal);
330dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setIndexedStoreAction(im, MVT::i32, Legal);
331dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setIndexedStoreAction(im, MVT::i64, Legal);
332dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setIndexedStoreAction(im, MVT::f64, Legal);
333dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setIndexedStoreAction(im, MVT::f32, Legal);
334dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
33572062f5744557e270a38192554c3126ea5f97434Tim Northover
336dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Trap.
337dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::TRAP, MVT::Other, Legal);
33872062f5744557e270a38192554c3126ea5f97434Tim Northover
339dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // We combine OR nodes for bitfield operations.
340dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setTargetDAGCombine(ISD::OR);
34172062f5744557e270a38192554c3126ea5f97434Tim Northover
342dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Vector add and sub nodes may conceal a high-half opportunity.
343dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Also, try to fold ADD into CSINC/CSINV..
344dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setTargetDAGCombine(ISD::ADD);
345dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setTargetDAGCombine(ISD::SUB);
34672062f5744557e270a38192554c3126ea5f97434Tim Northover
347dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setTargetDAGCombine(ISD::XOR);
348dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setTargetDAGCombine(ISD::SINT_TO_FP);
349dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setTargetDAGCombine(ISD::UINT_TO_FP);
35072062f5744557e270a38192554c3126ea5f97434Tim Northover
351dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setTargetDAGCombine(ISD::INTRINSIC_WO_CHAIN);
35272062f5744557e270a38192554c3126ea5f97434Tim Northover
353dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setTargetDAGCombine(ISD::ANY_EXTEND);
354dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setTargetDAGCombine(ISD::ZERO_EXTEND);
355dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setTargetDAGCombine(ISD::SIGN_EXTEND);
356dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setTargetDAGCombine(ISD::BITCAST);
357dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setTargetDAGCombine(ISD::CONCAT_VECTORS);
358dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setTargetDAGCombine(ISD::STORE);
35972062f5744557e270a38192554c3126ea5f97434Tim Northover
360dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setTargetDAGCombine(ISD::MUL);
36172062f5744557e270a38192554c3126ea5f97434Tim Northover
362dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setTargetDAGCombine(ISD::SELECT);
363dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setTargetDAGCombine(ISD::VSELECT);
36472062f5744557e270a38192554c3126ea5f97434Tim Northover
365dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setTargetDAGCombine(ISD::INTRINSIC_VOID);
366dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setTargetDAGCombine(ISD::INTRINSIC_W_CHAIN);
367dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setTargetDAGCombine(ISD::INSERT_VECTOR_ELT);
36872062f5744557e270a38192554c3126ea5f97434Tim Northover
369dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  MaxStoresPerMemset = MaxStoresPerMemsetOptSize = 8;
370dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  MaxStoresPerMemcpy = MaxStoresPerMemcpyOptSize = 4;
371dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  MaxStoresPerMemmove = MaxStoresPerMemmoveOptSize = 4;
37272062f5744557e270a38192554c3126ea5f97434Tim Northover
373dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setStackPointerRegisterToSaveRestore(AArch64::SP);
374211ffd242df8bacf4cbe034f5ca7545ab75b45dfTim Northover
375dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setSchedulingPreference(Sched::Hybrid);
37672062f5744557e270a38192554c3126ea5f97434Tim Northover
377dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Enable TBZ/TBNZ
378dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  MaskAndBranchFoldingIsLegal = true;
379dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
380dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setMinFunctionAlignment(2);
381dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
382dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  RequireStrictAlign = (Align == StrictAlign);
383dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
384dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setHasExtractBitsInsn(true);
385dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
386dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Subtarget->hasNEON()) {
387dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // FIXME: v1f64 shouldn't be legal if we can avoid it, because it leads to
388dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // silliness like this:
389dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FABS, MVT::v1f64, Expand);
390dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FADD, MVT::v1f64, Expand);
391dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FCEIL, MVT::v1f64, Expand);
392dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FCOPYSIGN, MVT::v1f64, Expand);
393dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FCOS, MVT::v1f64, Expand);
394dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FDIV, MVT::v1f64, Expand);
395dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FFLOOR, MVT::v1f64, Expand);
396dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FMA, MVT::v1f64, Expand);
397dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FMUL, MVT::v1f64, Expand);
398dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FNEARBYINT, MVT::v1f64, Expand);
399dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FNEG, MVT::v1f64, Expand);
400dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FPOW, MVT::v1f64, Expand);
401dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FREM, MVT::v1f64, Expand);
402dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FROUND, MVT::v1f64, Expand);
403dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FRINT, MVT::v1f64, Expand);
404dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FSIN, MVT::v1f64, Expand);
405dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FSINCOS, MVT::v1f64, Expand);
406dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FSQRT, MVT::v1f64, Expand);
407dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FSUB, MVT::v1f64, Expand);
408dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FTRUNC, MVT::v1f64, Expand);
409dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::SETCC, MVT::v1f64, Expand);
410dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::BR_CC, MVT::v1f64, Expand);
411dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::SELECT, MVT::v1f64, Expand);
412dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::SELECT_CC, MVT::v1f64, Expand);
413dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FP_EXTEND, MVT::v1f64, Expand);
414dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
415dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FP_TO_SINT, MVT::v1i64, Expand);
416dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FP_TO_UINT, MVT::v1i64, Expand);
417dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::SINT_TO_FP, MVT::v1i64, Expand);
418dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::UINT_TO_FP, MVT::v1i64, Expand);
419dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FP_ROUND, MVT::v1f64, Expand);
420dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
421dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::MUL, MVT::v1i64, Expand);
422dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
423dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // AArch64 doesn't have a direct vector ->f32 conversion instructions for
424dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // elements smaller than i32, so promote the input to i32 first.
425dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::UINT_TO_FP, MVT::v4i8, Promote);
426dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::SINT_TO_FP, MVT::v4i8, Promote);
427dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::UINT_TO_FP, MVT::v4i16, Promote);
428dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::SINT_TO_FP, MVT::v4i16, Promote);
429dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Similarly, there is no direct i32 -> f64 vector conversion instruction.
430dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::SINT_TO_FP, MVT::v2i32, Custom);
431dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::UINT_TO_FP, MVT::v2i32, Custom);
432dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::SINT_TO_FP, MVT::v2i64, Custom);
433dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::UINT_TO_FP, MVT::v2i64, Custom);
43472062f5744557e270a38192554c3126ea5f97434Tim Northover
435dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // AArch64 doesn't have MUL.2d:
436dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::MUL, MVT::v2i64, Expand);
437dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::ANY_EXTEND, MVT::v4i32, Legal);
438dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setTruncStoreAction(MVT::v2i32, MVT::v2i16, Expand);
439dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Likewise, narrowing and extending vector loads/stores aren't handled
440dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // directly.
441dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    for (unsigned VT = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
442dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines         VT <= (unsigned)MVT::LAST_VECTOR_VALUETYPE; ++VT) {
443dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
444dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      setOperationAction(ISD::SIGN_EXTEND_INREG, (MVT::SimpleValueType)VT,
445dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                         Expand);
446dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
447dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      setOperationAction(ISD::MULHS, (MVT::SimpleValueType)VT, Expand);
448dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      setOperationAction(ISD::SMUL_LOHI, (MVT::SimpleValueType)VT, Expand);
449dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      setOperationAction(ISD::MULHU, (MVT::SimpleValueType)VT, Expand);
450dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      setOperationAction(ISD::UMUL_LOHI, (MVT::SimpleValueType)VT, Expand);
451dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
452dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      setOperationAction(ISD::BSWAP, (MVT::SimpleValueType)VT, Expand);
453dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
454dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      for (unsigned InnerVT = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
455dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines           InnerVT <= (unsigned)MVT::LAST_VECTOR_VALUETYPE; ++InnerVT)
456dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        setTruncStoreAction((MVT::SimpleValueType)VT,
457dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                            (MVT::SimpleValueType)InnerVT, Expand);
458dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      setLoadExtAction(ISD::SEXTLOAD, (MVT::SimpleValueType)VT, Expand);
459dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      setLoadExtAction(ISD::ZEXTLOAD, (MVT::SimpleValueType)VT, Expand);
460dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      setLoadExtAction(ISD::EXTLOAD, (MVT::SimpleValueType)VT, Expand);
461dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
46272062f5744557e270a38192554c3126ea5f97434Tim Northover
463dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // AArch64 has implementations of a lot of rounding-like FP operations.
464dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    static MVT RoundingVecTypes[] = {MVT::v2f32, MVT::v4f32, MVT::v2f64 };
465dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    for (unsigned I = 0; I < array_lengthof(RoundingVecTypes); ++I) {
466dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      MVT Ty = RoundingVecTypes[I];
467dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      setOperationAction(ISD::FFLOOR, Ty, Legal);
468dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      setOperationAction(ISD::FNEARBYINT, Ty, Legal);
469dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      setOperationAction(ISD::FCEIL, Ty, Legal);
470dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      setOperationAction(ISD::FRINT, Ty, Legal);
471dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      setOperationAction(ISD::FTRUNC, Ty, Legal);
472dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      setOperationAction(ISD::FROUND, Ty, Legal);
473dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
474dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
475dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
47672062f5744557e270a38192554c3126ea5f97434Tim Northover
477dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesvoid AArch64TargetLowering::addTypeForNEON(EVT VT, EVT PromotedBitwiseVT) {
478dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (VT == MVT::v2f32) {
479dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::LOAD, VT.getSimpleVT(), Promote);
480dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    AddPromotedToType(ISD::LOAD, VT.getSimpleVT(), MVT::v2i32);
48172062f5744557e270a38192554c3126ea5f97434Tim Northover
482dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::STORE, VT.getSimpleVT(), Promote);
483dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    AddPromotedToType(ISD::STORE, VT.getSimpleVT(), MVT::v2i32);
484dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  } else if (VT == MVT::v2f64 || VT == MVT::v4f32) {
485dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::LOAD, VT.getSimpleVT(), Promote);
486dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    AddPromotedToType(ISD::LOAD, VT.getSimpleVT(), MVT::v2i64);
48772062f5744557e270a38192554c3126ea5f97434Tim Northover
488dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::STORE, VT.getSimpleVT(), Promote);
489dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    AddPromotedToType(ISD::STORE, VT.getSimpleVT(), MVT::v2i64);
490dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
49172062f5744557e270a38192554c3126ea5f97434Tim Northover
492dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Mark vector float intrinsics as expand.
493dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (VT == MVT::v2f32 || VT == MVT::v4f32 || VT == MVT::v2f64) {
494dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FSIN, VT.getSimpleVT(), Expand);
495dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FCOS, VT.getSimpleVT(), Expand);
496dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FPOWI, VT.getSimpleVT(), Expand);
497dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FPOW, VT.getSimpleVT(), Expand);
498dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FLOG, VT.getSimpleVT(), Expand);
499dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FLOG2, VT.getSimpleVT(), Expand);
500dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FLOG10, VT.getSimpleVT(), Expand);
501dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FEXP, VT.getSimpleVT(), Expand);
502dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::FEXP2, VT.getSimpleVT(), Expand);
503dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
50472062f5744557e270a38192554c3126ea5f97434Tim Northover
505dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT.getSimpleVT(), Custom);
506dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::INSERT_VECTOR_ELT, VT.getSimpleVT(), Custom);
507dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::BUILD_VECTOR, VT.getSimpleVT(), Custom);
508dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::VECTOR_SHUFFLE, VT.getSimpleVT(), Custom);
509dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::EXTRACT_SUBVECTOR, VT.getSimpleVT(), Custom);
510dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::SRA, VT.getSimpleVT(), Custom);
511dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::SRL, VT.getSimpleVT(), Custom);
512dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::SHL, VT.getSimpleVT(), Custom);
513dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::AND, VT.getSimpleVT(), Custom);
514dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::OR, VT.getSimpleVT(), Custom);
515dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::SETCC, VT.getSimpleVT(), Custom);
516dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::CONCAT_VECTORS, VT.getSimpleVT(), Legal);
517dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
518dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::SELECT, VT.getSimpleVT(), Expand);
519dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::SELECT_CC, VT.getSimpleVT(), Expand);
520dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::VSELECT, VT.getSimpleVT(), Expand);
521dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setLoadExtAction(ISD::EXTLOAD, VT.getSimpleVT(), Expand);
522dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
523dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // CNT supports only B element sizes.
524dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (VT != MVT::v8i8 && VT != MVT::v16i8)
525dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    setOperationAction(ISD::CTPOP, VT.getSimpleVT(), Expand);
526dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
527dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::UDIV, VT.getSimpleVT(), Expand);
528dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::SDIV, VT.getSimpleVT(), Expand);
529dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::UREM, VT.getSimpleVT(), Expand);
530dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::SREM, VT.getSimpleVT(), Expand);
531dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::FREM, VT.getSimpleVT(), Expand);
532dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
533dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::FP_TO_SINT, VT.getSimpleVT(), Custom);
534dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  setOperationAction(ISD::FP_TO_UINT, VT.getSimpleVT(), Custom);
535dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
536dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Subtarget->isLittleEndian()) {
537dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    for (unsigned im = (unsigned)ISD::PRE_INC;
538dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines         im != (unsigned)ISD::LAST_INDEXED_MODE; ++im) {
539dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      setIndexedLoadAction(im, VT.getSimpleVT(), Legal);
540dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      setIndexedStoreAction(im, VT.getSimpleVT(), Legal);
541dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
542dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
543dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
54472062f5744557e270a38192554c3126ea5f97434Tim Northover
545dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesvoid AArch64TargetLowering::addDRTypeForNEON(MVT VT) {
546dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  addRegisterClass(VT, &AArch64::FPR64RegClass);
547dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  addTypeForNEON(VT, MVT::v2i32);
548dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
54972062f5744557e270a38192554c3126ea5f97434Tim Northover
550dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesvoid AArch64TargetLowering::addQRTypeForNEON(MVT VT) {
551dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  addRegisterClass(VT, &AArch64::FPR128RegClass);
552dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  addTypeForNEON(VT, MVT::v4i32);
553dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
55472062f5744557e270a38192554c3126ea5f97434Tim Northover
555dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesEVT AArch64TargetLowering::getSetCCResultType(LLVMContext &, EVT VT) const {
556dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!VT.isVector())
557dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return MVT::i32;
558dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return VT.changeVectorElementTypeToInteger();
559dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
56072062f5744557e270a38192554c3126ea5f97434Tim Northover
561dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// computeKnownBitsForTargetNode - Determine which of the bits specified in
562dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// Mask are known to be either zero or one and return them in the
563dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// KnownZero/KnownOne bitsets.
564dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesvoid AArch64TargetLowering::computeKnownBitsForTargetNode(
565dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    const SDValue Op, APInt &KnownZero, APInt &KnownOne,
566dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    const SelectionDAG &DAG, unsigned Depth) const {
567dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  switch (Op.getOpcode()) {
568dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  default:
569dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
570dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::CSEL: {
571dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    APInt KnownZero2, KnownOne2;
572dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    DAG.computeKnownBits(Op->getOperand(0), KnownZero, KnownOne, Depth + 1);
573dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    DAG.computeKnownBits(Op->getOperand(1), KnownZero2, KnownOne2, Depth + 1);
574dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    KnownZero &= KnownZero2;
575dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    KnownOne &= KnownOne2;
576dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
577dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
578dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::INTRINSIC_W_CHAIN: {
579dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines   ConstantSDNode *CN = cast<ConstantSDNode>(Op->getOperand(1));
580dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Intrinsic::ID IntID = static_cast<Intrinsic::ID>(CN->getZExtValue());
581dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    switch (IntID) {
582dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    default: return;
583dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_ldaxr:
584dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_ldxr: {
585dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      unsigned BitWidth = KnownOne.getBitWidth();
586dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      EVT VT = cast<MemIntrinsicSDNode>(Op)->getMemoryVT();
587dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      unsigned MemBits = VT.getScalarType().getSizeInBits();
588dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      KnownZero |= APInt::getHighBitsSet(BitWidth, BitWidth - MemBits);
589dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return;
590dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
591dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
592dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
593dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
594dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::INTRINSIC_WO_CHAIN:
595dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::INTRINSIC_VOID: {
596dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned IntNo = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
597dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    switch (IntNo) {
598dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    default:
599dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      break;
600dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_umaxv:
601dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_uminv: {
602dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // Figure out the datatype of the vector operand. The UMINV instruction
603dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // will zero extend the result, so we can mark as known zero all the
604dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // bits larger than the element datatype. 32-bit or larget doesn't need
605dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // this as those are legal types and will be handled by isel directly.
606dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      MVT VT = Op.getOperand(1).getValueType().getSimpleVT();
607dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      unsigned BitWidth = KnownZero.getBitWidth();
608dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (VT == MVT::v8i8 || VT == MVT::v16i8) {
609dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        assert(BitWidth >= 8 && "Unexpected width!");
610dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        APInt Mask = APInt::getHighBitsSet(BitWidth, BitWidth - 8);
611dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        KnownZero |= Mask;
612dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      } else if (VT == MVT::v4i16 || VT == MVT::v8i16) {
613dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        assert(BitWidth >= 16 && "Unexpected width!");
614dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        APInt Mask = APInt::getHighBitsSet(BitWidth, BitWidth - 16);
615dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        KnownZero |= Mask;
616dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
617dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      break;
618dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    } break;
619dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
620dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
621dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
622dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
62372062f5744557e270a38192554c3126ea5f97434Tim Northover
624dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesMVT AArch64TargetLowering::getScalarShiftAmountTy(EVT LHSTy) const {
625dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return MVT::i64;
626dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
62772062f5744557e270a38192554c3126ea5f97434Tim Northover
628dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesunsigned AArch64TargetLowering::getMaximalGlobalOffset() const {
629dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // FIXME: On AArch64, this depends on the type.
630cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines  // Basically, the addressable offsets are up to 4095 * Ty.getSizeInBytes().
631dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // and the offset has to be a multiple of the related size in bytes.
632dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return 4095;
633dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
63472062f5744557e270a38192554c3126ea5f97434Tim Northover
635dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesFastISel *
636dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesAArch64TargetLowering::createFastISel(FunctionLoweringInfo &funcInfo,
637dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                      const TargetLibraryInfo *libInfo) const {
638dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return AArch64::createFastISel(funcInfo, libInfo);
63972062f5744557e270a38192554c3126ea5f97434Tim Northover}
64072062f5744557e270a38192554c3126ea5f97434Tim Northover
641dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesconst char *AArch64TargetLowering::getTargetNodeName(unsigned Opcode) const {
642dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  switch (Opcode) {
643dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  default:
644dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return nullptr;
645dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::CALL:              return "AArch64ISD::CALL";
646dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::ADRP:              return "AArch64ISD::ADRP";
647dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::ADDlow:            return "AArch64ISD::ADDlow";
648dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::LOADgot:           return "AArch64ISD::LOADgot";
649dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::RET_FLAG:          return "AArch64ISD::RET_FLAG";
650dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::BRCOND:            return "AArch64ISD::BRCOND";
651dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::CSEL:              return "AArch64ISD::CSEL";
652dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::FCSEL:             return "AArch64ISD::FCSEL";
653dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::CSINV:             return "AArch64ISD::CSINV";
654dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::CSNEG:             return "AArch64ISD::CSNEG";
655dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::CSINC:             return "AArch64ISD::CSINC";
656dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::THREAD_POINTER:    return "AArch64ISD::THREAD_POINTER";
657dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::TLSDESC_CALL:      return "AArch64ISD::TLSDESC_CALL";
658dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::ADC:               return "AArch64ISD::ADC";
659dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::SBC:               return "AArch64ISD::SBC";
660dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::ADDS:              return "AArch64ISD::ADDS";
661dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::SUBS:              return "AArch64ISD::SUBS";
662dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::ADCS:              return "AArch64ISD::ADCS";
663dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::SBCS:              return "AArch64ISD::SBCS";
664dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::ANDS:              return "AArch64ISD::ANDS";
665dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::FCMP:              return "AArch64ISD::FCMP";
666dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::FMIN:              return "AArch64ISD::FMIN";
667dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::FMAX:              return "AArch64ISD::FMAX";
668dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::DUP:               return "AArch64ISD::DUP";
669dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::DUPLANE8:          return "AArch64ISD::DUPLANE8";
670dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::DUPLANE16:         return "AArch64ISD::DUPLANE16";
671dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::DUPLANE32:         return "AArch64ISD::DUPLANE32";
672dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::DUPLANE64:         return "AArch64ISD::DUPLANE64";
673dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::MOVI:              return "AArch64ISD::MOVI";
674dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::MOVIshift:         return "AArch64ISD::MOVIshift";
675dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::MOVIedit:          return "AArch64ISD::MOVIedit";
676dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::MOVImsl:           return "AArch64ISD::MOVImsl";
677dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::FMOV:              return "AArch64ISD::FMOV";
678dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::MVNIshift:         return "AArch64ISD::MVNIshift";
679dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::MVNImsl:           return "AArch64ISD::MVNImsl";
680dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::BICi:              return "AArch64ISD::BICi";
681dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::ORRi:              return "AArch64ISD::ORRi";
682dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::BSL:               return "AArch64ISD::BSL";
683dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::NEG:               return "AArch64ISD::NEG";
684dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::EXTR:              return "AArch64ISD::EXTR";
685dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::ZIP1:              return "AArch64ISD::ZIP1";
686dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::ZIP2:              return "AArch64ISD::ZIP2";
687dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::UZP1:              return "AArch64ISD::UZP1";
688dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::UZP2:              return "AArch64ISD::UZP2";
689dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::TRN1:              return "AArch64ISD::TRN1";
690dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::TRN2:              return "AArch64ISD::TRN2";
691dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::REV16:             return "AArch64ISD::REV16";
692dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::REV32:             return "AArch64ISD::REV32";
693dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::REV64:             return "AArch64ISD::REV64";
694dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::EXT:               return "AArch64ISD::EXT";
695dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::VSHL:              return "AArch64ISD::VSHL";
696dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::VLSHR:             return "AArch64ISD::VLSHR";
697dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::VASHR:             return "AArch64ISD::VASHR";
698dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::CMEQ:              return "AArch64ISD::CMEQ";
699dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::CMGE:              return "AArch64ISD::CMGE";
700dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::CMGT:              return "AArch64ISD::CMGT";
701dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::CMHI:              return "AArch64ISD::CMHI";
702dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::CMHS:              return "AArch64ISD::CMHS";
703dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::FCMEQ:             return "AArch64ISD::FCMEQ";
704dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::FCMGE:             return "AArch64ISD::FCMGE";
705dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::FCMGT:             return "AArch64ISD::FCMGT";
706dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::CMEQz:             return "AArch64ISD::CMEQz";
707dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::CMGEz:             return "AArch64ISD::CMGEz";
708dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::CMGTz:             return "AArch64ISD::CMGTz";
709dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::CMLEz:             return "AArch64ISD::CMLEz";
710dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::CMLTz:             return "AArch64ISD::CMLTz";
711dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::FCMEQz:            return "AArch64ISD::FCMEQz";
712dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::FCMGEz:            return "AArch64ISD::FCMGEz";
713dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::FCMGTz:            return "AArch64ISD::FCMGTz";
714dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::FCMLEz:            return "AArch64ISD::FCMLEz";
715dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::FCMLTz:            return "AArch64ISD::FCMLTz";
716dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::NOT:               return "AArch64ISD::NOT";
717dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::BIT:               return "AArch64ISD::BIT";
718dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::CBZ:               return "AArch64ISD::CBZ";
719dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::CBNZ:              return "AArch64ISD::CBNZ";
720dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::TBZ:               return "AArch64ISD::TBZ";
721dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::TBNZ:              return "AArch64ISD::TBNZ";
722dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::TC_RETURN:         return "AArch64ISD::TC_RETURN";
723dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::SITOF:             return "AArch64ISD::SITOF";
724dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::UITOF:             return "AArch64ISD::UITOF";
725dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::SQSHL_I:           return "AArch64ISD::SQSHL_I";
726dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::UQSHL_I:           return "AArch64ISD::UQSHL_I";
727dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::SRSHR_I:           return "AArch64ISD::SRSHR_I";
728dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::URSHR_I:           return "AArch64ISD::URSHR_I";
729dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::SQSHLU_I:          return "AArch64ISD::SQSHLU_I";
730dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::WrapperLarge:      return "AArch64ISD::WrapperLarge";
731dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::LD2post:           return "AArch64ISD::LD2post";
732dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::LD3post:           return "AArch64ISD::LD3post";
733dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::LD4post:           return "AArch64ISD::LD4post";
734dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::ST2post:           return "AArch64ISD::ST2post";
735dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::ST3post:           return "AArch64ISD::ST3post";
736dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::ST4post:           return "AArch64ISD::ST4post";
737dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::LD1x2post:         return "AArch64ISD::LD1x2post";
738dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::LD1x3post:         return "AArch64ISD::LD1x3post";
739dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::LD1x4post:         return "AArch64ISD::LD1x4post";
740dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::ST1x2post:         return "AArch64ISD::ST1x2post";
741dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::ST1x3post:         return "AArch64ISD::ST1x3post";
742dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::ST1x4post:         return "AArch64ISD::ST1x4post";
743dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::LD1DUPpost:        return "AArch64ISD::LD1DUPpost";
744dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::LD2DUPpost:        return "AArch64ISD::LD2DUPpost";
745dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::LD3DUPpost:        return "AArch64ISD::LD3DUPpost";
746dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::LD4DUPpost:        return "AArch64ISD::LD4DUPpost";
747dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::LD1LANEpost:       return "AArch64ISD::LD1LANEpost";
748dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::LD2LANEpost:       return "AArch64ISD::LD2LANEpost";
749dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::LD3LANEpost:       return "AArch64ISD::LD3LANEpost";
750dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::LD4LANEpost:       return "AArch64ISD::LD4LANEpost";
751dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::ST2LANEpost:       return "AArch64ISD::ST2LANEpost";
752dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::ST3LANEpost:       return "AArch64ISD::ST3LANEpost";
753dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::ST4LANEpost:       return "AArch64ISD::ST4LANEpost";
754dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
75572062f5744557e270a38192554c3126ea5f97434Tim Northover}
75672062f5744557e270a38192554c3126ea5f97434Tim Northover
75772062f5744557e270a38192554c3126ea5f97434Tim NorthoverMachineBasicBlock *
75872062f5744557e270a38192554c3126ea5f97434Tim NorthoverAArch64TargetLowering::EmitF128CSEL(MachineInstr *MI,
75972062f5744557e270a38192554c3126ea5f97434Tim Northover                                    MachineBasicBlock *MBB) const {
760dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // We materialise the F128CSEL pseudo-instruction as some control flow and a
761dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // phi node:
762dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
763dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // OrigBB:
764dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //     [... previous instrs leading to comparison ...]
765dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //     b.ne TrueBB
766dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //     b EndBB
767dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // TrueBB:
768dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //     ; Fallthrough
769dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // EndBB:
770dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //     Dest = PHI [IfTrue, TrueBB], [IfFalse, OrigBB]
771dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
77272062f5744557e270a38192554c3126ea5f97434Tim Northover  const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
77372062f5744557e270a38192554c3126ea5f97434Tim Northover  MachineFunction *MF = MBB->getParent();
77472062f5744557e270a38192554c3126ea5f97434Tim Northover  const BasicBlock *LLVM_BB = MBB->getBasicBlock();
77572062f5744557e270a38192554c3126ea5f97434Tim Northover  DebugLoc DL = MI->getDebugLoc();
77672062f5744557e270a38192554c3126ea5f97434Tim Northover  MachineFunction::iterator It = MBB;
77772062f5744557e270a38192554c3126ea5f97434Tim Northover  ++It;
77872062f5744557e270a38192554c3126ea5f97434Tim Northover
77972062f5744557e270a38192554c3126ea5f97434Tim Northover  unsigned DestReg = MI->getOperand(0).getReg();
78072062f5744557e270a38192554c3126ea5f97434Tim Northover  unsigned IfTrueReg = MI->getOperand(1).getReg();
78172062f5744557e270a38192554c3126ea5f97434Tim Northover  unsigned IfFalseReg = MI->getOperand(2).getReg();
78272062f5744557e270a38192554c3126ea5f97434Tim Northover  unsigned CondCode = MI->getOperand(3).getImm();
78372062f5744557e270a38192554c3126ea5f97434Tim Northover  bool NZCVKilled = MI->getOperand(4).isKill();
78472062f5744557e270a38192554c3126ea5f97434Tim Northover
78572062f5744557e270a38192554c3126ea5f97434Tim Northover  MachineBasicBlock *TrueBB = MF->CreateMachineBasicBlock(LLVM_BB);
78672062f5744557e270a38192554c3126ea5f97434Tim Northover  MachineBasicBlock *EndBB = MF->CreateMachineBasicBlock(LLVM_BB);
78772062f5744557e270a38192554c3126ea5f97434Tim Northover  MF->insert(It, TrueBB);
78872062f5744557e270a38192554c3126ea5f97434Tim Northover  MF->insert(It, EndBB);
78972062f5744557e270a38192554c3126ea5f97434Tim Northover
79072062f5744557e270a38192554c3126ea5f97434Tim Northover  // Transfer rest of current basic-block to EndBB
79136b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines  EndBB->splice(EndBB->begin(), MBB, std::next(MachineBasicBlock::iterator(MI)),
79272062f5744557e270a38192554c3126ea5f97434Tim Northover                MBB->end());
79372062f5744557e270a38192554c3126ea5f97434Tim Northover  EndBB->transferSuccessorsAndUpdatePHIs(MBB);
79472062f5744557e270a38192554c3126ea5f97434Tim Northover
795dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  BuildMI(MBB, DL, TII->get(AArch64::Bcc)).addImm(CondCode).addMBB(TrueBB);
796dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  BuildMI(MBB, DL, TII->get(AArch64::B)).addMBB(EndBB);
79772062f5744557e270a38192554c3126ea5f97434Tim Northover  MBB->addSuccessor(TrueBB);
79872062f5744557e270a38192554c3126ea5f97434Tim Northover  MBB->addSuccessor(EndBB);
79972062f5744557e270a38192554c3126ea5f97434Tim Northover
800dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // TrueBB falls through to the end.
801dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  TrueBB->addSuccessor(EndBB);
802dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
8032f21452ba1ee5bde8fee438b4cf1a1ce95beb6caAmara Emerson  if (!NZCVKilled) {
8042f21452ba1ee5bde8fee438b4cf1a1ce95beb6caAmara Emerson    TrueBB->addLiveIn(AArch64::NZCV);
8052f21452ba1ee5bde8fee438b4cf1a1ce95beb6caAmara Emerson    EndBB->addLiveIn(AArch64::NZCV);
8062f21452ba1ee5bde8fee438b4cf1a1ce95beb6caAmara Emerson  }
8072f21452ba1ee5bde8fee438b4cf1a1ce95beb6caAmara Emerson
808dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  BuildMI(*EndBB, EndBB->begin(), DL, TII->get(AArch64::PHI), DestReg)
809dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      .addReg(IfTrueReg)
810dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      .addMBB(TrueBB)
811dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      .addReg(IfFalseReg)
812dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      .addMBB(MBB);
81372062f5744557e270a38192554c3126ea5f97434Tim Northover
81472062f5744557e270a38192554c3126ea5f97434Tim Northover  MI->eraseFromParent();
81572062f5744557e270a38192554c3126ea5f97434Tim Northover  return EndBB;
81672062f5744557e270a38192554c3126ea5f97434Tim Northover}
81772062f5744557e270a38192554c3126ea5f97434Tim Northover
81872062f5744557e270a38192554c3126ea5f97434Tim NorthoverMachineBasicBlock *
81972062f5744557e270a38192554c3126ea5f97434Tim NorthoverAArch64TargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
820dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                                 MachineBasicBlock *BB) const {
82172062f5744557e270a38192554c3126ea5f97434Tim Northover  switch (MI->getOpcode()) {
822dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  default:
823dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines#ifndef NDEBUG
824dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    MI->dump();
825dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines#endif
826cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines    llvm_unreachable("Unexpected instruction for custom inserter!");
82772062f5744557e270a38192554c3126ea5f97434Tim Northover
828dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64::F128CSEL:
829dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return EmitF128CSEL(MI, BB);
83072062f5744557e270a38192554c3126ea5f97434Tim Northover
831dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case TargetOpcode::STACKMAP:
832dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case TargetOpcode::PATCHPOINT:
833dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return emitPatchPoint(MI, BB);
83472062f5744557e270a38192554c3126ea5f97434Tim Northover  }
83572062f5744557e270a38192554c3126ea5f97434Tim Northover}
83672062f5744557e270a38192554c3126ea5f97434Tim Northover
837dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//===----------------------------------------------------------------------===//
838dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// AArch64 Lowering private implementation.
839dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//===----------------------------------------------------------------------===//
84072062f5744557e270a38192554c3126ea5f97434Tim Northover
841dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//===----------------------------------------------------------------------===//
842dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// Lowering Code
843dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//===----------------------------------------------------------------------===//
84472062f5744557e270a38192554c3126ea5f97434Tim Northover
845dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// changeIntCCToAArch64CC - Convert a DAG integer condition code to an AArch64
846dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// CC
847dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic AArch64CC::CondCode changeIntCCToAArch64CC(ISD::CondCode CC) {
848dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  switch (CC) {
849dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  default:
850dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    llvm_unreachable("Unknown condition code!");
851dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SETNE:
852dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return AArch64CC::NE;
853dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SETEQ:
854dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return AArch64CC::EQ;
855dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SETGT:
856dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return AArch64CC::GT;
857dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SETGE:
858dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return AArch64CC::GE;
859dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SETLT:
860dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return AArch64CC::LT;
861dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SETLE:
862dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return AArch64CC::LE;
863dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SETUGT:
864dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return AArch64CC::HI;
865dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SETUGE:
866dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return AArch64CC::HS;
867dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SETULT:
868dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return AArch64CC::LO;
869dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SETULE:
870dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return AArch64CC::LS;
871dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
87272062f5744557e270a38192554c3126ea5f97434Tim Northover}
87372062f5744557e270a38192554c3126ea5f97434Tim Northover
874dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// changeFPCCToAArch64CC - Convert a DAG fp condition code to an AArch64 CC.
875dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic void changeFPCCToAArch64CC(ISD::CondCode CC,
876dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  AArch64CC::CondCode &CondCode,
877dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  AArch64CC::CondCode &CondCode2) {
878dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  CondCode2 = AArch64CC::AL;
879dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  switch (CC) {
880dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  default:
881dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    llvm_unreachable("Unknown FP condition!");
882dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SETEQ:
883dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SETOEQ:
884dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    CondCode = AArch64CC::EQ;
885dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
886dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SETGT:
887dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SETOGT:
888dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    CondCode = AArch64CC::GT;
889dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
890dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SETGE:
891dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SETOGE:
892dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    CondCode = AArch64CC::GE;
893dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
894dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SETOLT:
895dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    CondCode = AArch64CC::MI;
896dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
897dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SETOLE:
898dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    CondCode = AArch64CC::LS;
899dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
900dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SETONE:
901dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    CondCode = AArch64CC::MI;
902dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    CondCode2 = AArch64CC::GT;
903dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
904dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SETO:
905dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    CondCode = AArch64CC::VC;
906dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
907dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SETUO:
908dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    CondCode = AArch64CC::VS;
909dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
910dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SETUEQ:
911dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    CondCode = AArch64CC::EQ;
912dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    CondCode2 = AArch64CC::VS;
913dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
914dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SETUGT:
915dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    CondCode = AArch64CC::HI;
916dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
917dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SETUGE:
918dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    CondCode = AArch64CC::PL;
919dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
920dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SETLT:
921dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SETULT:
922dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    CondCode = AArch64CC::LT;
923dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
924dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SETLE:
925dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SETULE:
926dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    CondCode = AArch64CC::LE;
927dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
928dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SETNE:
929dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SETUNE:
930dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    CondCode = AArch64CC::NE;
931dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
93272062f5744557e270a38192554c3126ea5f97434Tim Northover  }
93372062f5744557e270a38192554c3126ea5f97434Tim Northover}
93472062f5744557e270a38192554c3126ea5f97434Tim Northover
935dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// changeVectorFPCCToAArch64CC - Convert a DAG fp condition code to an AArch64
936dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// CC usable with the vector instructions. Fewer operations are available
937dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// without a real NZCV register, so we have to use less efficient combinations
938dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// to get the same effect.
939dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic void changeVectorFPCCToAArch64CC(ISD::CondCode CC,
940dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                        AArch64CC::CondCode &CondCode,
941dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                        AArch64CC::CondCode &CondCode2,
942dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                        bool &Invert) {
943dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Invert = false;
944dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  switch (CC) {
945dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  default:
946dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Mostly the scalar mappings work fine.
947dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    changeFPCCToAArch64CC(CC, CondCode, CondCode2);
948dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
949dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SETUO:
950dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Invert = true; // Fallthrough
951dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SETO:
952dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    CondCode = AArch64CC::MI;
953dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    CondCode2 = AArch64CC::GE;
954dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
955dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SETUEQ:
956dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SETULT:
957dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SETULE:
958dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SETUGT:
959dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SETUGE:
960dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // All of the compare-mask comparisons are ordered, but we can switch
961dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // between the two by a double inversion. E.g. ULE == !OGT.
962dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Invert = true;
963dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    changeFPCCToAArch64CC(getSetCCInverse(CC, false), CondCode, CondCode2);
964dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
965dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
966dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
96772062f5744557e270a38192554c3126ea5f97434Tim Northover
968dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic bool isLegalArithImmed(uint64_t C) {
969dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Matches AArch64DAGToDAGISel::SelectArithImmed().
970dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return (C >> 12 == 0) || ((C & 0xFFFULL) == 0 && C >> 24 == 0);
971dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
97272062f5744557e270a38192554c3126ea5f97434Tim Northover
973dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue emitComparison(SDValue LHS, SDValue RHS, ISD::CondCode CC,
974dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                              SDLoc dl, SelectionDAG &DAG) {
975dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT = LHS.getValueType();
976dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
977dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (VT.isFloatingPoint())
978dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::FCMP, dl, VT, LHS, RHS);
979dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
980dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // The CMP instruction is just an alias for SUBS, and representing it as
981dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // SUBS means that it's possible to get CSE with subtract operations.
982dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // A later phase can perform the optimization of setting the destination
983dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // register to WZR/XZR if it ends up being unused.
984dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned Opcode = AArch64ISD::SUBS;
985dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
986dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (RHS.getOpcode() == ISD::SUB && isa<ConstantSDNode>(RHS.getOperand(0)) &&
987dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      cast<ConstantSDNode>(RHS.getOperand(0))->getZExtValue() == 0 &&
988dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      (CC == ISD::SETEQ || CC == ISD::SETNE)) {
989dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // We'd like to combine a (CMP op1, (sub 0, op2) into a CMN instruction on
990dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // the grounds that "op1 - (-op2) == op1 + op2". However, the C and V flags
991dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // can be set differently by this operation. It comes down to whether
992dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // "SInt(~op2)+1 == SInt(~op2+1)" (and the same for UInt). If they are then
993dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // everything is fine. If not then the optimization is wrong. Thus general
994dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // comparisons are only valid if op2 != 0.
995dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
996dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // So, finally, the only LLVM-native comparisons that don't mention C and V
997dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // are SETEQ and SETNE. They're the only ones we can safely use CMN for in
998dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // the absence of information about op2.
999dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Opcode = AArch64ISD::ADDS;
1000dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    RHS = RHS.getOperand(1);
1001dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  } else if (LHS.getOpcode() == ISD::AND && isa<ConstantSDNode>(RHS) &&
1002dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines             cast<ConstantSDNode>(RHS)->getZExtValue() == 0 &&
1003dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines             !isUnsignedIntSetCC(CC)) {
1004dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Similarly, (CMP (and X, Y), 0) can be implemented with a TST
1005dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // (a.k.a. ANDS) except that the flags are only guaranteed to work for one
1006dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // of the signed comparisons.
1007dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Opcode = AArch64ISD::ANDS;
1008dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    RHS = LHS.getOperand(1);
1009dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    LHS = LHS.getOperand(0);
1010dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
101172062f5744557e270a38192554c3126ea5f97434Tim Northover
1012dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return DAG.getNode(Opcode, dl, DAG.getVTList(VT, MVT::i32), LHS, RHS)
1013dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      .getValue(1);
1014dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
101572062f5744557e270a38192554c3126ea5f97434Tim Northover
1016dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue getAArch64Cmp(SDValue LHS, SDValue RHS, ISD::CondCode CC,
1017dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                             SDValue &AArch64cc, SelectionDAG &DAG, SDLoc dl) {
1018dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (ConstantSDNode *RHSC = dyn_cast<ConstantSDNode>(RHS.getNode())) {
1019dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    EVT VT = RHS.getValueType();
1020dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    uint64_t C = RHSC->getZExtValue();
1021dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (!isLegalArithImmed(C)) {
1022dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // Constant does not fit, try adjusting it by one?
1023dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      switch (CC) {
1024dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      default:
1025dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        break;
1026dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      case ISD::SETLT:
1027dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      case ISD::SETGE:
1028dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        if ((VT == MVT::i32 && C != 0x80000000 &&
1029dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines             isLegalArithImmed((uint32_t)(C - 1))) ||
1030dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines            (VT == MVT::i64 && C != 0x80000000ULL &&
1031dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines             isLegalArithImmed(C - 1ULL))) {
1032dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          CC = (CC == ISD::SETLT) ? ISD::SETLE : ISD::SETGT;
1033dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          C = (VT == MVT::i32) ? (uint32_t)(C - 1) : C - 1;
1034dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          RHS = DAG.getConstant(C, VT);
1035dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        }
1036dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        break;
1037dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      case ISD::SETULT:
1038dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      case ISD::SETUGE:
1039dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        if ((VT == MVT::i32 && C != 0 &&
1040dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines             isLegalArithImmed((uint32_t)(C - 1))) ||
1041dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines            (VT == MVT::i64 && C != 0ULL && isLegalArithImmed(C - 1ULL))) {
1042dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          CC = (CC == ISD::SETULT) ? ISD::SETULE : ISD::SETUGT;
1043dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          C = (VT == MVT::i32) ? (uint32_t)(C - 1) : C - 1;
1044dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          RHS = DAG.getConstant(C, VT);
1045dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        }
1046dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        break;
1047dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      case ISD::SETLE:
1048dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      case ISD::SETGT:
1049dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        if ((VT == MVT::i32 && C != 0x7fffffff &&
1050dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines             isLegalArithImmed((uint32_t)(C + 1))) ||
1051dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines            (VT == MVT::i64 && C != 0x7ffffffffffffffULL &&
1052dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines             isLegalArithImmed(C + 1ULL))) {
1053dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          CC = (CC == ISD::SETLE) ? ISD::SETLT : ISD::SETGE;
1054dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          C = (VT == MVT::i32) ? (uint32_t)(C + 1) : C + 1;
1055dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          RHS = DAG.getConstant(C, VT);
1056dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        }
1057dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        break;
1058dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      case ISD::SETULE:
1059dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      case ISD::SETUGT:
1060dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        if ((VT == MVT::i32 && C != 0xffffffff &&
1061dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines             isLegalArithImmed((uint32_t)(C + 1))) ||
1062dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines            (VT == MVT::i64 && C != 0xfffffffffffffffULL &&
1063dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines             isLegalArithImmed(C + 1ULL))) {
1064dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          CC = (CC == ISD::SETULE) ? ISD::SETULT : ISD::SETUGE;
1065dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          C = (VT == MVT::i32) ? (uint32_t)(C + 1) : C + 1;
1066dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          RHS = DAG.getConstant(C, VT);
1067dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        }
1068dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        break;
1069dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
107072062f5744557e270a38192554c3126ea5f97434Tim Northover    }
107172062f5744557e270a38192554c3126ea5f97434Tim Northover  }
107272062f5744557e270a38192554c3126ea5f97434Tim Northover
1073dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Cmp = emitComparison(LHS, RHS, CC, dl, DAG);
1074dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  AArch64CC::CondCode AArch64CC = changeIntCCToAArch64CC(CC);
1075dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  AArch64cc = DAG.getConstant(AArch64CC, MVT::i32);
1076dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return Cmp;
1077dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
1078c2884320feebc543d2ce51151d5418dfc18da9e4Amara Emerson
1079dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic std::pair<SDValue, SDValue>
1080dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesgetAArch64XALUOOp(AArch64CC::CondCode &CC, SDValue Op, SelectionDAG &DAG) {
1081dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  assert((Op.getValueType() == MVT::i32 || Op.getValueType() == MVT::i64) &&
1082dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines         "Unsupported value type");
1083dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Value, Overflow;
1084dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc DL(Op);
1085dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue LHS = Op.getOperand(0);
1086dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue RHS = Op.getOperand(1);
1087dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned Opc = 0;
1088dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  switch (Op.getOpcode()) {
1089dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  default:
1090dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    llvm_unreachable("Unknown overflow instruction!");
1091dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SADDO:
1092dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Opc = AArch64ISD::ADDS;
1093dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    CC = AArch64CC::VS;
1094dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
1095dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::UADDO:
1096dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Opc = AArch64ISD::ADDS;
1097dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    CC = AArch64CC::HS;
1098dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
1099dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SSUBO:
1100dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Opc = AArch64ISD::SUBS;
1101dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    CC = AArch64CC::VS;
1102dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
1103dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::USUBO:
1104dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Opc = AArch64ISD::SUBS;
1105dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    CC = AArch64CC::LO;
1106dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
1107dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Multiply needs a little bit extra work.
1108dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SMULO:
1109dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::UMULO: {
1110dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    CC = AArch64CC::NE;
1111dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    bool IsSigned = (Op.getOpcode() == ISD::SMULO) ? true : false;
1112dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (Op.getValueType() == MVT::i32) {
1113dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      unsigned ExtendOpc = IsSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND;
1114dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // For a 32 bit multiply with overflow check we want the instruction
1115dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // selector to generate a widening multiply (SMADDL/UMADDL). For that we
1116dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // need to generate the following pattern:
1117dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // (i64 add 0, (i64 mul (i64 sext|zext i32 %a), (i64 sext|zext i32 %b))
1118dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      LHS = DAG.getNode(ExtendOpc, DL, MVT::i64, LHS);
1119dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      RHS = DAG.getNode(ExtendOpc, DL, MVT::i64, RHS);
1120dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      SDValue Mul = DAG.getNode(ISD::MUL, DL, MVT::i64, LHS, RHS);
1121dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      SDValue Add = DAG.getNode(ISD::ADD, DL, MVT::i64, Mul,
1122dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                DAG.getConstant(0, MVT::i64));
1123dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // On AArch64 the upper 32 bits are always zero extended for a 32 bit
1124dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // operation. We need to clear out the upper 32 bits, because we used a
1125dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // widening multiply that wrote all 64 bits. In the end this should be a
1126dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // noop.
1127dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Value = DAG.getNode(ISD::TRUNCATE, DL, MVT::i32, Add);
1128dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (IsSigned) {
1129dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // The signed overflow check requires more than just a simple check for
1130dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // any bit set in the upper 32 bits of the result. These bits could be
1131dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // just the sign bits of a negative number. To perform the overflow
1132dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // check we have to arithmetic shift right the 32nd bit of the result by
1133dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // 31 bits. Then we compare the result to the upper 32 bits.
1134dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue UpperBits = DAG.getNode(ISD::SRL, DL, MVT::i64, Add,
1135dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                        DAG.getConstant(32, MVT::i64));
1136dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        UpperBits = DAG.getNode(ISD::TRUNCATE, DL, MVT::i32, UpperBits);
1137dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue LowerBits = DAG.getNode(ISD::SRA, DL, MVT::i32, Value,
1138dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                        DAG.getConstant(31, MVT::i64));
1139dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // It is important that LowerBits is last, otherwise the arithmetic
1140dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // shift will not be folded into the compare (SUBS).
1141dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDVTList VTs = DAG.getVTList(MVT::i32, MVT::i32);
1142dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        Overflow = DAG.getNode(AArch64ISD::SUBS, DL, VTs, UpperBits, LowerBits)
1143dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                       .getValue(1);
1144dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      } else {
1145dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // The overflow check for unsigned multiply is easy. We only need to
1146dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // check if any of the upper 32 bits are set. This can be done with a
1147dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // CMP (shifted register). For that we need to generate the following
1148dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // pattern:
1149dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // (i64 AArch64ISD::SUBS i64 0, (i64 srl i64 %Mul, i64 32)
1150dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue UpperBits = DAG.getNode(ISD::SRL, DL, MVT::i64, Mul,
1151dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                        DAG.getConstant(32, MVT::i64));
1152dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDVTList VTs = DAG.getVTList(MVT::i64, MVT::i32);
1153dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        Overflow =
1154dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines            DAG.getNode(AArch64ISD::SUBS, DL, VTs, DAG.getConstant(0, MVT::i64),
1155dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                        UpperBits).getValue(1);
1156c2884320feebc543d2ce51151d5418dfc18da9e4Amara Emerson      }
1157dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      break;
1158dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
1159dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    assert(Op.getValueType() == MVT::i64 && "Expected an i64 value type");
1160dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // For the 64 bit multiply
1161dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Value = DAG.getNode(ISD::MUL, DL, MVT::i64, LHS, RHS);
1162dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (IsSigned) {
1163dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      SDValue UpperBits = DAG.getNode(ISD::MULHS, DL, MVT::i64, LHS, RHS);
1164dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      SDValue LowerBits = DAG.getNode(ISD::SRA, DL, MVT::i64, Value,
1165dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                      DAG.getConstant(63, MVT::i64));
1166dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // It is important that LowerBits is last, otherwise the arithmetic
1167dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // shift will not be folded into the compare (SUBS).
1168dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      SDVTList VTs = DAG.getVTList(MVT::i64, MVT::i32);
1169dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Overflow = DAG.getNode(AArch64ISD::SUBS, DL, VTs, UpperBits, LowerBits)
1170dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                     .getValue(1);
1171dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    } else {
1172dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      SDValue UpperBits = DAG.getNode(ISD::MULHU, DL, MVT::i64, LHS, RHS);
1173dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      SDVTList VTs = DAG.getVTList(MVT::i64, MVT::i32);
1174dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Overflow =
1175dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          DAG.getNode(AArch64ISD::SUBS, DL, VTs, DAG.getConstant(0, MVT::i64),
1176dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                      UpperBits).getValue(1);
117772062f5744557e270a38192554c3126ea5f97434Tim Northover    }
1178dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
117972062f5744557e270a38192554c3126ea5f97434Tim Northover  }
1180dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  } // switch (...)
118172062f5744557e270a38192554c3126ea5f97434Tim Northover
1182dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Opc) {
1183dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDVTList VTs = DAG.getVTList(Op->getValueType(0), MVT::i32);
118472062f5744557e270a38192554c3126ea5f97434Tim Northover
1185dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Emit the AArch64 operation with overflow check.
1186dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Value = DAG.getNode(Opc, DL, VTs, LHS, RHS);
1187dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Overflow = Value.getValue(1);
118872062f5744557e270a38192554c3126ea5f97434Tim Northover  }
1189dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return std::make_pair(Value, Overflow);
119072062f5744557e270a38192554c3126ea5f97434Tim Northover}
119172062f5744557e270a38192554c3126ea5f97434Tim Northover
1192dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::LowerF128Call(SDValue Op, SelectionDAG &DAG,
1193dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                             RTLIB::Libcall Call) const {
1194dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SmallVector<SDValue, 2> Ops;
1195dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  for (unsigned i = 0, e = Op->getNumOperands(); i != e; ++i)
1196dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Ops.push_back(Op.getOperand(i));
119772062f5744557e270a38192554c3126ea5f97434Tim Northover
1198dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return makeLibCall(DAG, Call, MVT::f128, &Ops[0], Ops.size(), false,
1199dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                     SDLoc(Op)).first;
1200dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
120172062f5744557e270a38192554c3126ea5f97434Tim Northover
1202dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue LowerXOR(SDValue Op, SelectionDAG &DAG) {
1203dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Sel = Op.getOperand(0);
1204dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Other = Op.getOperand(1);
120572062f5744557e270a38192554c3126ea5f97434Tim Northover
1206dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // If neither operand is a SELECT_CC, give up.
1207dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Sel.getOpcode() != ISD::SELECT_CC)
1208dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    std::swap(Sel, Other);
1209dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Sel.getOpcode() != ISD::SELECT_CC)
1210dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return Op;
121172062f5744557e270a38192554c3126ea5f97434Tim Northover
1212dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // The folding we want to perform is:
1213dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // (xor x, (select_cc a, b, cc, 0, -1) )
1214dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //   -->
1215dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // (csel x, (xor x, -1), cc ...)
1216dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //
1217dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // The latter will get matched to a CSINV instruction.
121872062f5744557e270a38192554c3126ea5f97434Tim Northover
1219dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  ISD::CondCode CC = cast<CondCodeSDNode>(Sel.getOperand(4))->get();
1220dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue LHS = Sel.getOperand(0);
1221dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue RHS = Sel.getOperand(1);
1222dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue TVal = Sel.getOperand(2);
1223dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue FVal = Sel.getOperand(3);
1224dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc dl(Sel);
122572062f5744557e270a38192554c3126ea5f97434Tim Northover
1226dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // FIXME: This could be generalized to non-integer comparisons.
1227dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (LHS.getValueType() != MVT::i32 && LHS.getValueType() != MVT::i64)
1228dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return Op;
122972062f5744557e270a38192554c3126ea5f97434Tim Northover
1230dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  ConstantSDNode *CFVal = dyn_cast<ConstantSDNode>(FVal);
1231dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  ConstantSDNode *CTVal = dyn_cast<ConstantSDNode>(TVal);
123272062f5744557e270a38192554c3126ea5f97434Tim Northover
1233dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // The the values aren't constants, this isn't the pattern we're looking for.
1234dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!CFVal || !CTVal)
1235dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return Op;
123672062f5744557e270a38192554c3126ea5f97434Tim Northover
1237dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // We can commute the SELECT_CC by inverting the condition.  This
1238dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // might be needed to make this fit into a CSINV pattern.
1239dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (CTVal->isAllOnesValue() && CFVal->isNullValue()) {
1240dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    std::swap(TVal, FVal);
1241dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    std::swap(CTVal, CFVal);
1242dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    CC = ISD::getSetCCInverse(CC, true);
1243dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
124472062f5744557e270a38192554c3126ea5f97434Tim Northover
1245dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // If the constants line up, perform the transform!
1246dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (CTVal->isNullValue() && CFVal->isAllOnesValue()) {
1247dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue CCVal;
1248dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue Cmp = getAArch64Cmp(LHS, RHS, CC, CCVal, DAG, dl);
124972062f5744557e270a38192554c3126ea5f97434Tim Northover
1250dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    FVal = Other;
1251dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    TVal = DAG.getNode(ISD::XOR, dl, Other.getValueType(), Other,
1252dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                       DAG.getConstant(-1ULL, Other.getValueType()));
125372062f5744557e270a38192554c3126ea5f97434Tim Northover
1254dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::CSEL, dl, Sel.getValueType(), FVal, TVal,
1255dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                       CCVal, Cmp);
1256dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
125772062f5744557e270a38192554c3126ea5f97434Tim Northover
1258dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return Op;
1259dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
126072062f5744557e270a38192554c3126ea5f97434Tim Northover
1261dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue LowerADDC_ADDE_SUBC_SUBE(SDValue Op, SelectionDAG &DAG) {
1262dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT = Op.getValueType();
1263dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
1264dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Let legalize expand this if it isn't a legal type yet.
1265dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!DAG.getTargetLoweringInfo().isTypeLegal(VT))
1266dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
126772062f5744557e270a38192554c3126ea5f97434Tim Northover
1268dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDVTList VTs = DAG.getVTList(VT, MVT::i32);
1269dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
1270dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned Opc;
1271dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  bool ExtraOp = false;
1272dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  switch (Op.getOpcode()) {
1273dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  default:
1274cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines    llvm_unreachable("Invalid code");
1275dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::ADDC:
1276dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Opc = AArch64ISD::ADDS;
1277dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
1278dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SUBC:
1279dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Opc = AArch64ISD::SUBS;
1280dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
1281dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::ADDE:
1282dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Opc = AArch64ISD::ADCS;
1283dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    ExtraOp = true;
1284dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
1285dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SUBE:
1286dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Opc = AArch64ISD::SBCS;
1287dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    ExtraOp = true;
1288dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
128972062f5744557e270a38192554c3126ea5f97434Tim Northover  }
129072062f5744557e270a38192554c3126ea5f97434Tim Northover
1291dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!ExtraOp)
1292dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(Opc, SDLoc(Op), VTs, Op.getOperand(0), Op.getOperand(1));
1293dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return DAG.getNode(Opc, SDLoc(Op), VTs, Op.getOperand(0), Op.getOperand(1),
1294dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                     Op.getOperand(2));
1295dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
1296dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
1297dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue LowerXALUO(SDValue Op, SelectionDAG &DAG) {
1298dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Let legalize expand this if it isn't a legal type yet.
1299dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!DAG.getTargetLoweringInfo().isTypeLegal(Op.getValueType()))
1300dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
130172062f5744557e270a38192554c3126ea5f97434Tim Northover
1302dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  AArch64CC::CondCode CC;
1303dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // The actual operation that sets the overflow or carry flag.
1304dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Value, Overflow;
1305dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  std::tie(Value, Overflow) = getAArch64XALUOOp(CC, Op, DAG);
130672062f5744557e270a38192554c3126ea5f97434Tim Northover
1307dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // We use 0 and 1 as false and true values.
1308dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue TVal = DAG.getConstant(1, MVT::i32);
1309dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue FVal = DAG.getConstant(0, MVT::i32);
131072062f5744557e270a38192554c3126ea5f97434Tim Northover
1311dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // We use an inverted condition, because the conditional select is inverted
1312dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // too. This will allow it to be selected to a single instruction:
1313dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // CSINC Wd, WZR, WZR, invert(cond).
1314dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue CCVal = DAG.getConstant(getInvertedCondCode(CC), MVT::i32);
1315dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Overflow = DAG.getNode(AArch64ISD::CSEL, SDLoc(Op), MVT::i32, FVal, TVal,
1316dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                         CCVal, Overflow);
131772062f5744557e270a38192554c3126ea5f97434Tim Northover
1318dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDVTList VTs = DAG.getVTList(Op.getValueType(), MVT::i32);
1319dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return DAG.getNode(ISD::MERGE_VALUES, SDLoc(Op), VTs, Value, Overflow);
132072062f5744557e270a38192554c3126ea5f97434Tim Northover}
132172062f5744557e270a38192554c3126ea5f97434Tim Northover
1322dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// Prefetch operands are:
1323dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// 1: Address to prefetch
1324dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// 2: bool isWrite
1325dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// 3: int locality (0 = no locality ... 3 = extreme locality)
1326dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// 4: bool isDataCache
1327dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue LowerPREFETCH(SDValue Op, SelectionDAG &DAG) {
1328dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc DL(Op);
1329dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned IsWrite = cast<ConstantSDNode>(Op.getOperand(2))->getZExtValue();
1330dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned Locality = cast<ConstantSDNode>(Op.getOperand(3))->getZExtValue();
1331dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // The data thing is not used.
1332dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // unsigned isData = cast<ConstantSDNode>(Op.getOperand(4))->getZExtValue();
1333dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
1334dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  bool IsStream = !Locality;
1335dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // When the locality number is set
1336dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Locality) {
1337dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // The front-end should have filtered out the out-of-range values
1338dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    assert(Locality <= 3 && "Prefetch locality out-of-range");
1339dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // The locality degree is the opposite of the cache speed.
1340dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Put the number the other way around.
1341dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // The encoding starts at 0 for level 1
1342dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Locality = 3 - Locality;
1343dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
134472062f5744557e270a38192554c3126ea5f97434Tim Northover
1345dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // built the mask value encoding the expected behavior.
1346dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned PrfOp = (IsWrite << 4) |     // Load/Store bit
1347dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                   (Locality << 1) |    // Cache level bits
1348dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                   (unsigned)IsStream;  // Stream bit
1349dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return DAG.getNode(AArch64ISD::PREFETCH, DL, MVT::Other, Op.getOperand(0),
1350dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                     DAG.getConstant(PrfOp, MVT::i32), Op.getOperand(1));
1351dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
135272062f5744557e270a38192554c3126ea5f97434Tim Northover
1353dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::LowerFP_EXTEND(SDValue Op,
1354dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                              SelectionDAG &DAG) const {
1355dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  assert(Op.getValueType() == MVT::f128 && "Unexpected lowering");
135672062f5744557e270a38192554c3126ea5f97434Tim Northover
1357dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  RTLIB::Libcall LC;
1358dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  LC = RTLIB::getFPEXT(Op.getOperand(0).getValueType(), Op.getValueType());
135972062f5744557e270a38192554c3126ea5f97434Tim Northover
1360dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return LowerF128Call(Op, DAG, LC);
1361dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
136272062f5744557e270a38192554c3126ea5f97434Tim Northover
1363dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::LowerFP_ROUND(SDValue Op,
1364dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                             SelectionDAG &DAG) const {
1365dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Op.getOperand(0).getValueType() != MVT::f128) {
1366dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // It's legal except when f128 is involved
1367dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return Op;
1368dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
136972062f5744557e270a38192554c3126ea5f97434Tim Northover
1370dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  RTLIB::Libcall LC;
1371dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  LC = RTLIB::getFPROUND(Op.getOperand(0).getValueType(), Op.getValueType());
137272062f5744557e270a38192554c3126ea5f97434Tim Northover
1373dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // FP_ROUND node has a second operand indicating whether it is known to be
1374dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // precise. That doesn't take part in the LibCall so we can't directly use
1375dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // LowerF128Call.
1376dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue SrcVal = Op.getOperand(0);
1377dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return makeLibCall(DAG, LC, Op.getValueType(), &SrcVal, 1,
1378dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                     /*isSigned*/ false, SDLoc(Op)).first;
1379dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
138072062f5744557e270a38192554c3126ea5f97434Tim Northover
1381dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue LowerVectorFP_TO_INT(SDValue Op, SelectionDAG &DAG) {
1382dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Warning: We maintain cost tables in AArch64TargetTransformInfo.cpp.
1383dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Any additional optimization in this function should be recorded
1384dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // in the cost tables.
1385dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT InVT = Op.getOperand(0).getValueType();
1386dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT = Op.getValueType();
138772062f5744557e270a38192554c3126ea5f97434Tim Northover
1388cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines  if (VT.getSizeInBits() < InVT.getSizeInBits()) {
1389dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDLoc dl(Op);
1390dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue Cv =
1391dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        DAG.getNode(Op.getOpcode(), dl, InVT.changeVectorElementTypeToInteger(),
1392dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                    Op.getOperand(0));
1393dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(ISD::TRUNCATE, dl, VT, Cv);
1394cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines  }
1395cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines
1396cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines  if (VT.getSizeInBits() > InVT.getSizeInBits()) {
1397dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDLoc dl(Op);
1398dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue Ext = DAG.getNode(ISD::FP_EXTEND, dl, MVT::v2f64, Op.getOperand(0));
1399dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(Op.getOpcode(), dl, VT, Ext);
1400dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
1401baa3c50a7bb0ddb0397b71b732c52b19cb700116Jakob Stoklund Olesen
1402dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Type changing conversions are illegal.
1403cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines  return Op;
140472062f5744557e270a38192554c3126ea5f97434Tim Northover}
140572062f5744557e270a38192554c3126ea5f97434Tim Northover
1406dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::LowerFP_TO_INT(SDValue Op,
1407dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                              SelectionDAG &DAG) const {
1408dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Op.getOperand(0).getValueType().isVector())
1409dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerVectorFP_TO_INT(Op, DAG);
141036b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
1411dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Op.getOperand(0).getValueType() != MVT::f128) {
1412dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // It's legal except when f128 is involved
1413dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return Op;
1414dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
141572062f5744557e270a38192554c3126ea5f97434Tim Northover
1416dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  RTLIB::Libcall LC;
1417dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Op.getOpcode() == ISD::FP_TO_SINT)
1418dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    LC = RTLIB::getFPTOSINT(Op.getOperand(0).getValueType(), Op.getValueType());
1419dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  else
1420dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    LC = RTLIB::getFPTOUINT(Op.getOperand(0).getValueType(), Op.getValueType());
142172062f5744557e270a38192554c3126ea5f97434Tim Northover
1422dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SmallVector<SDValue, 2> Ops;
1423dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  for (unsigned i = 0, e = Op->getNumOperands(); i != e; ++i)
1424dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Ops.push_back(Op.getOperand(i));
142572062f5744557e270a38192554c3126ea5f97434Tim Northover
1426dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return makeLibCall(DAG, LC, Op.getValueType(), &Ops[0], Ops.size(), false,
1427dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                     SDLoc(Op)).first;
1428dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
142972062f5744557e270a38192554c3126ea5f97434Tim Northover
1430dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue LowerVectorINT_TO_FP(SDValue Op, SelectionDAG &DAG) {
1431dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Warning: We maintain cost tables in AArch64TargetTransformInfo.cpp.
1432dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Any additional optimization in this function should be recorded
1433dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // in the cost tables.
1434dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT = Op.getValueType();
1435dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc dl(Op);
1436dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue In = Op.getOperand(0);
1437dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT InVT = In.getValueType();
143872062f5744557e270a38192554c3126ea5f97434Tim Northover
1439cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines  if (VT.getSizeInBits() < InVT.getSizeInBits()) {
1440cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines    MVT CastVT =
1441cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines        MVT::getVectorVT(MVT::getFloatingPointVT(InVT.getScalarSizeInBits()),
1442cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines                         InVT.getVectorNumElements());
1443cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines    In = DAG.getNode(Op.getOpcode(), dl, CastVT, In);
1444cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines    return DAG.getNode(ISD::FP_ROUND, dl, VT, In, DAG.getIntPtrConstant(0));
144572062f5744557e270a38192554c3126ea5f97434Tim Northover  }
144672062f5744557e270a38192554c3126ea5f97434Tim Northover
1447cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines  if (VT.getSizeInBits() > InVT.getSizeInBits()) {
1448cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines    unsigned CastOpc =
1449cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines        Op.getOpcode() == ISD::SINT_TO_FP ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND;
1450cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines    EVT CastVT = VT.changeVectorElementTypeToInteger();
1451cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines    In = DAG.getNode(CastOpc, dl, CastVT, In);
1452cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines    return DAG.getNode(Op.getOpcode(), dl, VT, In);
1453dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
145472062f5744557e270a38192554c3126ea5f97434Tim Northover
1455cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines  return Op;
1456dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
145772062f5744557e270a38192554c3126ea5f97434Tim Northover
1458dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::LowerINT_TO_FP(SDValue Op,
1459dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                            SelectionDAG &DAG) const {
1460dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Op.getValueType().isVector())
1461dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerVectorINT_TO_FP(Op, DAG);
146272062f5744557e270a38192554c3126ea5f97434Tim Northover
1463dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // i128 conversions are libcalls.
1464dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Op.getOperand(0).getValueType() == MVT::i128)
1465dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
1466dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
1467dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Other conversions are legal, unless it's to the completely software-based
1468dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // fp128.
1469dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Op.getValueType() != MVT::f128)
1470dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return Op;
1471dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
1472dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  RTLIB::Libcall LC;
1473dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Op.getOpcode() == ISD::SINT_TO_FP)
1474dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    LC = RTLIB::getSINTTOFP(Op.getOperand(0).getValueType(), Op.getValueType());
1475dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  else
1476dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    LC = RTLIB::getUINTTOFP(Op.getOperand(0).getValueType(), Op.getValueType());
1477dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
1478dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return LowerF128Call(Op, DAG, LC);
1479dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
1480dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
1481dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::LowerFSINCOS(SDValue Op,
1482dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                            SelectionDAG &DAG) const {
1483dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // For iOS, we want to call an alternative entry point: __sincos_stret,
1484dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // which returns the values in two S / D registers.
1485dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc dl(Op);
1486dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Arg = Op.getOperand(0);
1487dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT ArgVT = Arg.getValueType();
1488dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Type *ArgTy = ArgVT.getTypeForEVT(*DAG.getContext());
1489dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
1490dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  ArgListTy Args;
1491dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  ArgListEntry Entry;
1492dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
1493dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Entry.Node = Arg;
1494dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Entry.Ty = ArgTy;
1495dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Entry.isSExt = false;
1496dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Entry.isZExt = false;
1497dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Args.push_back(Entry);
1498dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
1499dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  const char *LibcallName =
1500dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      (ArgVT == MVT::f64) ? "__sincos_stret" : "__sincosf_stret";
1501dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Callee = DAG.getExternalSymbol(LibcallName, getPointerTy());
1502dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
1503dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  StructType *RetTy = StructType::get(ArgTy, ArgTy, NULL);
1504dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  TargetLowering::CallLoweringInfo CLI(DAG);
1505dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  CLI.setDebugLoc(dl).setChain(DAG.getEntryNode())
1506cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines    .setCallee(CallingConv::Fast, RetTy, Callee, std::move(Args), 0);
1507dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
1508dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  std::pair<SDValue, SDValue> CallResult = LowerCallTo(CLI);
1509dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return CallResult.first;
1510dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
1511dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
1512dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::LowerOperation(SDValue Op,
1513dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                              SelectionDAG &DAG) const {
1514dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  switch (Op.getOpcode()) {
1515dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  default:
1516dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    llvm_unreachable("unimplemented operand");
1517dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
1518dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::GlobalAddress:
1519dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerGlobalAddress(Op, DAG);
1520dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::GlobalTLSAddress:
1521dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerGlobalTLSAddress(Op, DAG);
1522dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SETCC:
1523dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerSETCC(Op, DAG);
1524dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::BR_CC:
1525dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerBR_CC(Op, DAG);
1526dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SELECT:
1527dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerSELECT(Op, DAG);
1528dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SELECT_CC:
1529dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerSELECT_CC(Op, DAG);
1530dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::JumpTable:
1531dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerJumpTable(Op, DAG);
1532dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::ConstantPool:
1533dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerConstantPool(Op, DAG);
1534dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::BlockAddress:
1535dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerBlockAddress(Op, DAG);
1536dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::VASTART:
1537dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerVASTART(Op, DAG);
1538dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::VACOPY:
1539dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerVACOPY(Op, DAG);
1540dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::VAARG:
1541dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerVAARG(Op, DAG);
1542dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::ADDC:
1543dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::ADDE:
1544dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SUBC:
1545dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SUBE:
1546dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerADDC_ADDE_SUBC_SUBE(Op, DAG);
1547dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SADDO:
1548dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::UADDO:
1549dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SSUBO:
1550dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::USUBO:
1551dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SMULO:
1552dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::UMULO:
1553dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerXALUO(Op, DAG);
1554dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::FADD:
1555dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerF128Call(Op, DAG, RTLIB::ADD_F128);
1556dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::FSUB:
1557dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerF128Call(Op, DAG, RTLIB::SUB_F128);
1558dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::FMUL:
1559dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerF128Call(Op, DAG, RTLIB::MUL_F128);
1560dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::FDIV:
1561dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerF128Call(Op, DAG, RTLIB::DIV_F128);
1562dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::FP_ROUND:
1563dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerFP_ROUND(Op, DAG);
1564dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::FP_EXTEND:
1565dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerFP_EXTEND(Op, DAG);
1566dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::FRAMEADDR:
1567dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerFRAMEADDR(Op, DAG);
1568dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::RETURNADDR:
1569dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerRETURNADDR(Op, DAG);
1570dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::INSERT_VECTOR_ELT:
1571dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerINSERT_VECTOR_ELT(Op, DAG);
1572dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::EXTRACT_VECTOR_ELT:
1573dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerEXTRACT_VECTOR_ELT(Op, DAG);
1574dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::BUILD_VECTOR:
1575dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerBUILD_VECTOR(Op, DAG);
1576dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::VECTOR_SHUFFLE:
1577dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerVECTOR_SHUFFLE(Op, DAG);
1578dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::EXTRACT_SUBVECTOR:
1579dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerEXTRACT_SUBVECTOR(Op, DAG);
1580dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SRA:
1581dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SRL:
1582dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SHL:
1583dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerVectorSRA_SRL_SHL(Op, DAG);
1584dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SHL_PARTS:
1585dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerShiftLeftParts(Op, DAG);
1586dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SRL_PARTS:
1587dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SRA_PARTS:
1588dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerShiftRightParts(Op, DAG);
1589dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::CTPOP:
1590dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerCTPOP(Op, DAG);
1591dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::FCOPYSIGN:
1592dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerFCOPYSIGN(Op, DAG);
1593dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::AND:
1594dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerVectorAND(Op, DAG);
1595dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::OR:
1596dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerVectorOR(Op, DAG);
1597dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::XOR:
1598dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerXOR(Op, DAG);
1599dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::PREFETCH:
1600dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerPREFETCH(Op, DAG);
1601dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SINT_TO_FP:
1602dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::UINT_TO_FP:
1603dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerINT_TO_FP(Op, DAG);
1604dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::FP_TO_SINT:
1605dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::FP_TO_UINT:
1606dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerFP_TO_INT(Op, DAG);
1607dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::FSINCOS:
1608dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerFSINCOS(Op, DAG);
160972062f5744557e270a38192554c3126ea5f97434Tim Northover  }
1610dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
161172062f5744557e270a38192554c3126ea5f97434Tim Northover
1612dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// getFunctionAlignment - Return the Log2 alignment of this function.
1613dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesunsigned AArch64TargetLowering::getFunctionAlignment(const Function *F) const {
1614dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return 2;
1615dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
161672062f5744557e270a38192554c3126ea5f97434Tim Northover
1617dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//===----------------------------------------------------------------------===//
1618dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//                      Calling Convention Implementation
1619dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//===----------------------------------------------------------------------===//
162072062f5744557e270a38192554c3126ea5f97434Tim Northover
1621dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines#include "AArch64GenCallingConv.inc"
1622dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
1623dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// Selects the correct CCAssignFn for a the given CallingConvention
1624dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// value.
1625dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesCCAssignFn *AArch64TargetLowering::CCAssignFnForCall(CallingConv::ID CC,
1626dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                                     bool IsVarArg) const {
1627dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  switch (CC) {
1628dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  default:
1629dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    llvm_unreachable("Unsupported calling convention.");
1630dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case CallingConv::WebKit_JS:
1631dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return CC_AArch64_WebKit_JS;
1632dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case CallingConv::C:
1633dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case CallingConv::Fast:
1634dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (!Subtarget->isTargetDarwin())
1635dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return CC_AArch64_AAPCS;
1636dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return IsVarArg ? CC_AArch64_DarwinPCS_VarArg : CC_AArch64_DarwinPCS;
1637dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
1638dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
163972062f5744557e270a38192554c3126ea5f97434Tim Northover
1640dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::LowerFormalArguments(
1641dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue Chain, CallingConv::ID CallConv, bool isVarArg,
1642dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    const SmallVectorImpl<ISD::InputArg> &Ins, SDLoc DL, SelectionDAG &DAG,
1643dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SmallVectorImpl<SDValue> &InVals) const {
1644dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  MachineFunction &MF = DAG.getMachineFunction();
1645dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  MachineFrameInfo *MFI = MF.getFrameInfo();
1646dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
1647dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Assign locations to all of the incoming arguments.
1648dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SmallVector<CCValAssign, 16> ArgLocs;
1649dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
1650dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                 getTargetMachine(), ArgLocs, *DAG.getContext());
1651dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
1652dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // At this point, Ins[].VT may already be promoted to i32. To correctly
1653dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // handle passing i8 as i8 instead of i32 on stack, we pass in both i32 and
1654dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // i8 to CC_AArch64_AAPCS with i32 being ValVT and i8 being LocVT.
1655dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Since AnalyzeFormalArguments uses Ins[].VT for both ValVT and LocVT, here
1656dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // we use a special version of AnalyzeFormalArguments to pass in ValVT and
1657dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // LocVT.
1658dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned NumArgs = Ins.size();
1659dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Function::const_arg_iterator CurOrigArg = MF.getFunction()->arg_begin();
1660dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned CurArgIdx = 0;
1661dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  for (unsigned i = 0; i != NumArgs; ++i) {
1662dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    MVT ValVT = Ins[i].VT;
1663dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    std::advance(CurOrigArg, Ins[i].OrigArgIndex - CurArgIdx);
1664dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    CurArgIdx = Ins[i].OrigArgIndex;
1665dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
1666dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Get type of the original argument.
1667dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    EVT ActualVT = getValueType(CurOrigArg->getType(), /*AllowUnknown*/ true);
1668dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    MVT ActualMVT = ActualVT.isSimple() ? ActualVT.getSimpleVT() : MVT::Other;
1669dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // If ActualMVT is i1/i8/i16, we should set LocVT to i8/i8/i16.
1670dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (ActualMVT == MVT::i1 || ActualMVT == MVT::i8)
1671dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      ValVT = MVT::i8;
1672dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    else if (ActualMVT == MVT::i16)
1673dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      ValVT = MVT::i16;
1674dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
1675dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    CCAssignFn *AssignFn = CCAssignFnForCall(CallConv, /*IsVarArg=*/false);
1676dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    bool Res =
1677dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        AssignFn(i, ValVT, ValVT, CCValAssign::Full, Ins[i].Flags, CCInfo);
1678dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    assert(!Res && "Call operand has unhandled type");
1679dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    (void)Res;
1680dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
1681dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  assert(ArgLocs.size() == Ins.size());
1682dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SmallVector<SDValue, 16> ArgValues;
168372062f5744557e270a38192554c3126ea5f97434Tim Northover  for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
168472062f5744557e270a38192554c3126ea5f97434Tim Northover    CCValAssign &VA = ArgLocs[i];
168572062f5744557e270a38192554c3126ea5f97434Tim Northover
1686dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (Ins[i].Flags.isByVal()) {
1687dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // Byval is used for HFAs in the PCS, but the system should work in a
1688dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // non-compliant manner for larger structs.
1689dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      EVT PtrTy = getPointerTy();
1690dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      int Size = Ins[i].Flags.getByValSize();
1691dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      unsigned NumRegs = (Size + 7) / 8;
169272062f5744557e270a38192554c3126ea5f97434Tim Northover
1693dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // FIXME: This works on big-endian for composite byvals, which are the common
1694dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // case. It should also work for fundamental types too.
1695dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      unsigned FrameIdx =
1696dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        MFI->CreateFixedObject(8 * NumRegs, VA.getLocMemOffset(), false);
1697dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      SDValue FrameIdxN = DAG.getFrameIndex(FrameIdx, PtrTy);
1698dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      InVals.push_back(FrameIdxN);
169972062f5744557e270a38192554c3126ea5f97434Tim Northover
170072062f5744557e270a38192554c3126ea5f97434Tim Northover      continue;
1701cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines    }
1702cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines
1703cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines    if (VA.isRegLoc()) {
1704dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // Arguments stored in registers.
1705dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      EVT RegVT = VA.getLocVT();
1706dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
1707dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      SDValue ArgValue;
1708dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      const TargetRegisterClass *RC;
1709dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
1710dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (RegVT == MVT::i32)
1711dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        RC = &AArch64::GPR32RegClass;
1712dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      else if (RegVT == MVT::i64)
1713dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        RC = &AArch64::GPR64RegClass;
1714dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      else if (RegVT == MVT::f32)
1715dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        RC = &AArch64::FPR32RegClass;
1716dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      else if (RegVT == MVT::f64 || RegVT.is64BitVector())
1717dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        RC = &AArch64::FPR64RegClass;
1718dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      else if (RegVT == MVT::f128 || RegVT.is128BitVector())
1719dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        RC = &AArch64::FPR128RegClass;
1720dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      else
1721dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        llvm_unreachable("RegVT not supported by FORMAL_ARGUMENTS Lowering");
172272062f5744557e270a38192554c3126ea5f97434Tim Northover
1723dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // Transform the arguments in physical registers into virtual ones.
1724dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      unsigned Reg = MF.addLiveIn(VA.getLocReg(), RC);
1725dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      ArgValue = DAG.getCopyFromReg(Chain, DL, Reg, RegVT);
172672062f5744557e270a38192554c3126ea5f97434Tim Northover
1727dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // If this is an 8, 16 or 32-bit value, it is really passed promoted
1728dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // to 64 bits.  Insert an assert[sz]ext to capture this, then
1729dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // truncate to the right size.
1730dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      switch (VA.getLocInfo()) {
1731dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      default:
1732dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        llvm_unreachable("Unknown loc info!");
1733dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      case CCValAssign::Full:
1734dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        break;
1735dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      case CCValAssign::BCvt:
1736dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        ArgValue = DAG.getNode(ISD::BITCAST, DL, VA.getValVT(), ArgValue);
1737dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        break;
1738dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      case CCValAssign::AExt:
1739dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      case CCValAssign::SExt:
1740dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      case CCValAssign::ZExt:
1741dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // SelectionDAGBuilder will insert appropriate AssertZExt & AssertSExt
1742dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // nodes after our lowering.
1743dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        assert(RegVT == Ins[i].VT && "incorrect register location selected");
1744dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        break;
1745dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
174672062f5744557e270a38192554c3126ea5f97434Tim Northover
1747dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      InVals.push_back(ArgValue);
1748dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
1749dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    } else { // VA.isRegLoc()
1750dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      assert(VA.isMemLoc() && "CCValAssign is neither reg nor mem");
1751dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      unsigned ArgOffset = VA.getLocMemOffset();
1752dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      unsigned ArgSize = VA.getLocVT().getSizeInBits() / 8;
175372062f5744557e270a38192554c3126ea5f97434Tim Northover
175436b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines      uint32_t BEAlign = 0;
1755dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (ArgSize < 8 && !Subtarget->isLittleEndian())
1756dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        BEAlign = 8 - ArgSize;
175772062f5744557e270a38192554c3126ea5f97434Tim Northover
1758dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      int FI = MFI->CreateFixedObject(ArgSize, ArgOffset + BEAlign, true);
175972062f5744557e270a38192554c3126ea5f97434Tim Northover
1760dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // Create load nodes to retrieve arguments from the stack.
1761dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
1762dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      SDValue ArgValue;
176372062f5744557e270a38192554c3126ea5f97434Tim Northover
1764cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      // For NON_EXTLOAD, generic code in getLoad assert(ValVT == MemVT)
1765dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      ISD::LoadExtType ExtType = ISD::NON_EXTLOAD;
1766cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      MVT MemVT = VA.getValVT();
1767cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines
1768dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      switch (VA.getLocInfo()) {
1769dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      default:
1770dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        break;
1771cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      case CCValAssign::BCvt:
1772cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines        MemVT = VA.getLocVT();
1773cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines        break;
1774dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      case CCValAssign::SExt:
1775dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        ExtType = ISD::SEXTLOAD;
1776dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        break;
1777dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      case CCValAssign::ZExt:
1778dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        ExtType = ISD::ZEXTLOAD;
1779dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        break;
1780dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      case CCValAssign::AExt:
1781dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        ExtType = ISD::EXTLOAD;
1782dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        break;
1783dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
178472062f5744557e270a38192554c3126ea5f97434Tim Northover
1785cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      ArgValue = DAG.getExtLoad(ExtType, DL, VA.getLocVT(), Chain, FIN,
1786dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                MachinePointerInfo::getFixedStack(FI),
1787cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines                                MemVT, false, false, false, nullptr);
178872062f5744557e270a38192554c3126ea5f97434Tim Northover
1789dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      InVals.push_back(ArgValue);
1790dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
179172062f5744557e270a38192554c3126ea5f97434Tim Northover  }
179272062f5744557e270a38192554c3126ea5f97434Tim Northover
1793dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // varargs
1794dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (isVarArg) {
1795dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (!Subtarget->isTargetDarwin()) {
1796dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // The AAPCS variadic function ABI is identical to the non-variadic
1797dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // one. As a result there may be more arguments in registers and we should
1798dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // save them for future reference.
1799dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      saveVarArgRegisters(CCInfo, DAG, DL, Chain);
1800dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
180172062f5744557e270a38192554c3126ea5f97434Tim Northover
1802dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    AArch64FunctionInfo *AFI = MF.getInfo<AArch64FunctionInfo>();
1803dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // This will point to the next argument passed via stack.
1804dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned StackOffset = CCInfo.getNextStackOffset();
1805dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // We currently pass all varargs at 8-byte alignment.
1806dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    StackOffset = ((StackOffset + 7) & ~7);
1807dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    AFI->setVarArgsStackIndex(MFI->CreateFixedObject(4, StackOffset, true));
180872062f5744557e270a38192554c3126ea5f97434Tim Northover  }
180972062f5744557e270a38192554c3126ea5f97434Tim Northover
1810dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  AArch64FunctionInfo *FuncInfo = MF.getInfo<AArch64FunctionInfo>();
1811dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned StackArgSize = CCInfo.getNextStackOffset();
1812dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  bool TailCallOpt = MF.getTarget().Options.GuaranteedTailCallOpt;
1813dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (DoesCalleeRestoreStack(CallConv, TailCallOpt)) {
1814dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // This is a non-standard ABI so by fiat I say we're allowed to make full
1815dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // use of the stack area to be popped, which must be aligned to 16 bytes in
1816dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // any case:
1817dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    StackArgSize = RoundUpToAlignment(StackArgSize, 16);
181872062f5744557e270a38192554c3126ea5f97434Tim Northover
1819dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // If we're expected to restore the stack (e.g. fastcc) then we'll be adding
1820dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // a multiple of 16.
1821dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    FuncInfo->setArgumentStackToRestore(StackArgSize);
1822dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
1823dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // This realignment carries over to the available bytes below. Our own
1824dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // callers will guarantee the space is free by giving an aligned value to
1825dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // CALLSEQ_START.
182672062f5744557e270a38192554c3126ea5f97434Tim Northover  }
1827dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Even if we're not expected to free up the space, it's useful to know how
1828dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // much is there while considering tail calls (because we can reuse it).
1829dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  FuncInfo->setBytesInStackArgArea(StackArgSize);
183072062f5744557e270a38192554c3126ea5f97434Tim Northover
1831dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return Chain;
1832dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
183372062f5744557e270a38192554c3126ea5f97434Tim Northover
1834dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesvoid AArch64TargetLowering::saveVarArgRegisters(CCState &CCInfo,
1835dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                                SelectionDAG &DAG, SDLoc DL,
1836dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                                SDValue &Chain) const {
1837dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  MachineFunction &MF = DAG.getMachineFunction();
1838dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  MachineFrameInfo *MFI = MF.getFrameInfo();
1839dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  AArch64FunctionInfo *FuncInfo = MF.getInfo<AArch64FunctionInfo>();
184072062f5744557e270a38192554c3126ea5f97434Tim Northover
1841dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SmallVector<SDValue, 8> MemOps;
184272062f5744557e270a38192554c3126ea5f97434Tim Northover
1843dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  static const MCPhysReg GPRArgRegs[] = { AArch64::X0, AArch64::X1, AArch64::X2,
1844dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                          AArch64::X3, AArch64::X4, AArch64::X5,
1845dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                          AArch64::X6, AArch64::X7 };
1846dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  static const unsigned NumGPRArgRegs = array_lengthof(GPRArgRegs);
1847dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned FirstVariadicGPR =
1848dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      CCInfo.getFirstUnallocated(GPRArgRegs, NumGPRArgRegs);
184972062f5744557e270a38192554c3126ea5f97434Tim Northover
1850dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned GPRSaveSize = 8 * (NumGPRArgRegs - FirstVariadicGPR);
1851dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  int GPRIdx = 0;
1852dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (GPRSaveSize != 0) {
1853dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    GPRIdx = MFI->CreateStackObject(GPRSaveSize, 8, false);
185472062f5744557e270a38192554c3126ea5f97434Tim Northover
1855dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue FIN = DAG.getFrameIndex(GPRIdx, getPointerTy());
1856dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
1857dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    for (unsigned i = FirstVariadicGPR; i < NumGPRArgRegs; ++i) {
1858dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      unsigned VReg = MF.addLiveIn(GPRArgRegs[i], &AArch64::GPR64RegClass);
1859dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      SDValue Val = DAG.getCopyFromReg(Chain, DL, VReg, MVT::i64);
1860dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      SDValue Store =
1861dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          DAG.getStore(Val.getValue(1), DL, Val, FIN,
1862dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                       MachinePointerInfo::getStack(i * 8), false, false, 0);
1863dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      MemOps.push_back(Store);
1864dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      FIN = DAG.getNode(ISD::ADD, DL, getPointerTy(), FIN,
1865dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                        DAG.getConstant(8, getPointerTy()));
1866dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
186772062f5744557e270a38192554c3126ea5f97434Tim Northover  }
1868dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  FuncInfo->setVarArgsGPRIndex(GPRIdx);
1869dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  FuncInfo->setVarArgsGPRSize(GPRSaveSize);
187072062f5744557e270a38192554c3126ea5f97434Tim Northover
1871dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Subtarget->hasFPARMv8()) {
1872dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    static const MCPhysReg FPRArgRegs[] = {
1873dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        AArch64::Q0, AArch64::Q1, AArch64::Q2, AArch64::Q3,
1874dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        AArch64::Q4, AArch64::Q5, AArch64::Q6, AArch64::Q7};
1875dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    static const unsigned NumFPRArgRegs = array_lengthof(FPRArgRegs);
1876dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned FirstVariadicFPR =
1877dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        CCInfo.getFirstUnallocated(FPRArgRegs, NumFPRArgRegs);
1878dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
1879dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned FPRSaveSize = 16 * (NumFPRArgRegs - FirstVariadicFPR);
1880dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    int FPRIdx = 0;
1881dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (FPRSaveSize != 0) {
1882dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      FPRIdx = MFI->CreateStackObject(FPRSaveSize, 16, false);
188372062f5744557e270a38192554c3126ea5f97434Tim Northover
1884dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      SDValue FIN = DAG.getFrameIndex(FPRIdx, getPointerTy());
188572062f5744557e270a38192554c3126ea5f97434Tim Northover
1886dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      for (unsigned i = FirstVariadicFPR; i < NumFPRArgRegs; ++i) {
1887dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        unsigned VReg = MF.addLiveIn(FPRArgRegs[i], &AArch64::FPR128RegClass);
1888dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue Val = DAG.getCopyFromReg(Chain, DL, VReg, MVT::f128);
1889dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
1890dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue Store =
1891dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines            DAG.getStore(Val.getValue(1), DL, Val, FIN,
1892dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                         MachinePointerInfo::getStack(i * 16), false, false, 0);
1893dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        MemOps.push_back(Store);
1894dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        FIN = DAG.getNode(ISD::ADD, DL, getPointerTy(), FIN,
1895dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                          DAG.getConstant(16, getPointerTy()));
1896dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
1897dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
1898dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    FuncInfo->setVarArgsFPRIndex(FPRIdx);
1899dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    FuncInfo->setVarArgsFPRSize(FPRSaveSize);
190072062f5744557e270a38192554c3126ea5f97434Tim Northover  }
190172062f5744557e270a38192554c3126ea5f97434Tim Northover
1902dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!MemOps.empty()) {
1903dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Chain = DAG.getNode(ISD::TokenFactor, DL, MVT::Other, MemOps);
1904dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
190572062f5744557e270a38192554c3126ea5f97434Tim Northover}
190672062f5744557e270a38192554c3126ea5f97434Tim Northover
1907dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// LowerCallResult - Lower the result values of a call into the
1908dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// appropriate copies out of appropriate physical registers.
1909dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::LowerCallResult(
1910dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue Chain, SDValue InFlag, CallingConv::ID CallConv, bool isVarArg,
1911dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    const SmallVectorImpl<ISD::InputArg> &Ins, SDLoc DL, SelectionDAG &DAG,
1912dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SmallVectorImpl<SDValue> &InVals, bool isThisReturn,
1913dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue ThisVal) const {
1914dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  CCAssignFn *RetCC = CallConv == CallingConv::WebKit_JS
1915dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                          ? RetCC_AArch64_WebKit_JS
1916dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                          : RetCC_AArch64_AAPCS;
191772062f5744557e270a38192554c3126ea5f97434Tim Northover  // Assign locations to each value returned by this call.
191872062f5744557e270a38192554c3126ea5f97434Tim Northover  SmallVector<CCValAssign, 16> RVLocs;
1919dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
192072062f5744557e270a38192554c3126ea5f97434Tim Northover                 getTargetMachine(), RVLocs, *DAG.getContext());
1921dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  CCInfo.AnalyzeCallResult(Ins, RetCC);
192272062f5744557e270a38192554c3126ea5f97434Tim Northover
1923dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Copy all of the result registers out of their specified physreg.
192472062f5744557e270a38192554c3126ea5f97434Tim Northover  for (unsigned i = 0; i != RVLocs.size(); ++i) {
192572062f5744557e270a38192554c3126ea5f97434Tim Northover    CCValAssign VA = RVLocs[i];
192672062f5744557e270a38192554c3126ea5f97434Tim Northover
1927dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Pass 'this' value directly from the argument to return value, to avoid
1928dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // reg unit interference
1929dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (i == 0 && isThisReturn) {
1930dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      assert(!VA.needsCustom() && VA.getLocVT() == MVT::i64 &&
1931dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines             "unexpected return calling convention register assignment");
1932dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      InVals.push_back(ThisVal);
1933dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      continue;
1934dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
193572062f5744557e270a38192554c3126ea5f97434Tim Northover
1936dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue Val =
1937dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        DAG.getCopyFromReg(Chain, DL, VA.getLocReg(), VA.getLocVT(), InFlag);
193872062f5744557e270a38192554c3126ea5f97434Tim Northover    Chain = Val.getValue(1);
193972062f5744557e270a38192554c3126ea5f97434Tim Northover    InFlag = Val.getValue(2);
194072062f5744557e270a38192554c3126ea5f97434Tim Northover
194172062f5744557e270a38192554c3126ea5f97434Tim Northover    switch (VA.getLocInfo()) {
1942dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    default:
1943dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      llvm_unreachable("Unknown loc info!");
1944dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case CCValAssign::Full:
194572062f5744557e270a38192554c3126ea5f97434Tim Northover      break;
1946dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case CCValAssign::BCvt:
1947dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Val = DAG.getNode(ISD::BITCAST, DL, VA.getValVT(), Val);
194872062f5744557e270a38192554c3126ea5f97434Tim Northover      break;
194972062f5744557e270a38192554c3126ea5f97434Tim Northover    }
195072062f5744557e270a38192554c3126ea5f97434Tim Northover
195172062f5744557e270a38192554c3126ea5f97434Tim Northover    InVals.push_back(Val);
195272062f5744557e270a38192554c3126ea5f97434Tim Northover  }
195372062f5744557e270a38192554c3126ea5f97434Tim Northover
195472062f5744557e270a38192554c3126ea5f97434Tim Northover  return Chain;
195572062f5744557e270a38192554c3126ea5f97434Tim Northover}
195672062f5744557e270a38192554c3126ea5f97434Tim Northover
1957dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesbool AArch64TargetLowering::isEligibleForTailCallOptimization(
1958dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue Callee, CallingConv::ID CalleeCC, bool isVarArg,
1959dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    bool isCalleeStructRet, bool isCallerStructRet,
1960dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    const SmallVectorImpl<ISD::OutputArg> &Outs,
1961dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    const SmallVectorImpl<SDValue> &OutVals,
1962dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    const SmallVectorImpl<ISD::InputArg> &Ins, SelectionDAG &DAG) const {
196372062f5744557e270a38192554c3126ea5f97434Tim Northover  // For CallingConv::C this function knows whether the ABI needs
196472062f5744557e270a38192554c3126ea5f97434Tim Northover  // changing. That's not true for other conventions so they will have to opt in
196572062f5744557e270a38192554c3126ea5f97434Tim Northover  // manually.
196672062f5744557e270a38192554c3126ea5f97434Tim Northover  if (!IsTailCallConvention(CalleeCC) && CalleeCC != CallingConv::C)
196772062f5744557e270a38192554c3126ea5f97434Tim Northover    return false;
196872062f5744557e270a38192554c3126ea5f97434Tim Northover
196972062f5744557e270a38192554c3126ea5f97434Tim Northover  const MachineFunction &MF = DAG.getMachineFunction();
197072062f5744557e270a38192554c3126ea5f97434Tim Northover  const Function *CallerF = MF.getFunction();
197172062f5744557e270a38192554c3126ea5f97434Tim Northover  CallingConv::ID CallerCC = CallerF->getCallingConv();
197272062f5744557e270a38192554c3126ea5f97434Tim Northover  bool CCMatch = CallerCC == CalleeCC;
197372062f5744557e270a38192554c3126ea5f97434Tim Northover
197472062f5744557e270a38192554c3126ea5f97434Tim Northover  // Byval parameters hand the function a pointer directly into the stack area
197572062f5744557e270a38192554c3126ea5f97434Tim Northover  // we want to reuse during a tail call. Working around this *is* possible (see
197672062f5744557e270a38192554c3126ea5f97434Tim Northover  // X86) but less efficient and uglier in LowerCall.
197772062f5744557e270a38192554c3126ea5f97434Tim Northover  for (Function::const_arg_iterator i = CallerF->arg_begin(),
1978dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                    e = CallerF->arg_end();
1979dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines       i != e; ++i)
198072062f5744557e270a38192554c3126ea5f97434Tim Northover    if (i->hasByValAttr())
198172062f5744557e270a38192554c3126ea5f97434Tim Northover      return false;
198272062f5744557e270a38192554c3126ea5f97434Tim Northover
198372062f5744557e270a38192554c3126ea5f97434Tim Northover  if (getTargetMachine().Options.GuaranteedTailCallOpt) {
198472062f5744557e270a38192554c3126ea5f97434Tim Northover    if (IsTailCallConvention(CalleeCC) && CCMatch)
198572062f5744557e270a38192554c3126ea5f97434Tim Northover      return true;
198672062f5744557e270a38192554c3126ea5f97434Tim Northover    return false;
198772062f5744557e270a38192554c3126ea5f97434Tim Northover  }
198872062f5744557e270a38192554c3126ea5f97434Tim Northover
198972062f5744557e270a38192554c3126ea5f97434Tim Northover  // Now we search for cases where we can use a tail call without changing the
199072062f5744557e270a38192554c3126ea5f97434Tim Northover  // ABI. Sibcall is used in some places (particularly gcc) to refer to this
199172062f5744557e270a38192554c3126ea5f97434Tim Northover  // concept.
199272062f5744557e270a38192554c3126ea5f97434Tim Northover
199372062f5744557e270a38192554c3126ea5f97434Tim Northover  // I want anyone implementing a new calling convention to think long and hard
199472062f5744557e270a38192554c3126ea5f97434Tim Northover  // about this assert.
1995dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  assert((!isVarArg || CalleeCC == CallingConv::C) &&
1996dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines         "Unexpected variadic calling convention");
199772062f5744557e270a38192554c3126ea5f97434Tim Northover
1998dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (isVarArg && !Outs.empty()) {
199972062f5744557e270a38192554c3126ea5f97434Tim Northover    // At least two cases here: if caller is fastcc then we can't have any
200072062f5744557e270a38192554c3126ea5f97434Tim Northover    // memory arguments (we'd be expected to clean up the stack afterwards). If
200172062f5744557e270a38192554c3126ea5f97434Tim Northover    // caller is C then we could potentially use its argument area.
200272062f5744557e270a38192554c3126ea5f97434Tim Northover
200372062f5744557e270a38192554c3126ea5f97434Tim Northover    // FIXME: for now we take the most conservative of these in both cases:
200472062f5744557e270a38192554c3126ea5f97434Tim Northover    // disallow all variadic memory operands.
200572062f5744557e270a38192554c3126ea5f97434Tim Northover    SmallVector<CCValAssign, 16> ArgLocs;
2006dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    CCState CCInfo(CalleeCC, isVarArg, DAG.getMachineFunction(),
200772062f5744557e270a38192554c3126ea5f97434Tim Northover                   getTargetMachine(), ArgLocs, *DAG.getContext());
200872062f5744557e270a38192554c3126ea5f97434Tim Northover
2009dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    CCInfo.AnalyzeCallOperands(Outs, CCAssignFnForCall(CalleeCC, true));
201072062f5744557e270a38192554c3126ea5f97434Tim Northover    for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i)
201172062f5744557e270a38192554c3126ea5f97434Tim Northover      if (!ArgLocs[i].isRegLoc())
201272062f5744557e270a38192554c3126ea5f97434Tim Northover        return false;
201372062f5744557e270a38192554c3126ea5f97434Tim Northover  }
201472062f5744557e270a38192554c3126ea5f97434Tim Northover
201572062f5744557e270a38192554c3126ea5f97434Tim Northover  // If the calling conventions do not match, then we'd better make sure the
201672062f5744557e270a38192554c3126ea5f97434Tim Northover  // results are returned in the same way as what the caller expects.
201772062f5744557e270a38192554c3126ea5f97434Tim Northover  if (!CCMatch) {
201872062f5744557e270a38192554c3126ea5f97434Tim Northover    SmallVector<CCValAssign, 16> RVLocs1;
201972062f5744557e270a38192554c3126ea5f97434Tim Northover    CCState CCInfo1(CalleeCC, false, DAG.getMachineFunction(),
202072062f5744557e270a38192554c3126ea5f97434Tim Northover                    getTargetMachine(), RVLocs1, *DAG.getContext());
2021dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    CCInfo1.AnalyzeCallResult(Ins, CCAssignFnForCall(CalleeCC, isVarArg));
202272062f5744557e270a38192554c3126ea5f97434Tim Northover
202372062f5744557e270a38192554c3126ea5f97434Tim Northover    SmallVector<CCValAssign, 16> RVLocs2;
202472062f5744557e270a38192554c3126ea5f97434Tim Northover    CCState CCInfo2(CallerCC, false, DAG.getMachineFunction(),
202572062f5744557e270a38192554c3126ea5f97434Tim Northover                    getTargetMachine(), RVLocs2, *DAG.getContext());
2026dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    CCInfo2.AnalyzeCallResult(Ins, CCAssignFnForCall(CallerCC, isVarArg));
202772062f5744557e270a38192554c3126ea5f97434Tim Northover
202872062f5744557e270a38192554c3126ea5f97434Tim Northover    if (RVLocs1.size() != RVLocs2.size())
202972062f5744557e270a38192554c3126ea5f97434Tim Northover      return false;
203072062f5744557e270a38192554c3126ea5f97434Tim Northover    for (unsigned i = 0, e = RVLocs1.size(); i != e; ++i) {
203172062f5744557e270a38192554c3126ea5f97434Tim Northover      if (RVLocs1[i].isRegLoc() != RVLocs2[i].isRegLoc())
203272062f5744557e270a38192554c3126ea5f97434Tim Northover        return false;
203372062f5744557e270a38192554c3126ea5f97434Tim Northover      if (RVLocs1[i].getLocInfo() != RVLocs2[i].getLocInfo())
203472062f5744557e270a38192554c3126ea5f97434Tim Northover        return false;
203572062f5744557e270a38192554c3126ea5f97434Tim Northover      if (RVLocs1[i].isRegLoc()) {
203672062f5744557e270a38192554c3126ea5f97434Tim Northover        if (RVLocs1[i].getLocReg() != RVLocs2[i].getLocReg())
203772062f5744557e270a38192554c3126ea5f97434Tim Northover          return false;
203872062f5744557e270a38192554c3126ea5f97434Tim Northover      } else {
203972062f5744557e270a38192554c3126ea5f97434Tim Northover        if (RVLocs1[i].getLocMemOffset() != RVLocs2[i].getLocMemOffset())
204072062f5744557e270a38192554c3126ea5f97434Tim Northover          return false;
204172062f5744557e270a38192554c3126ea5f97434Tim Northover      }
204272062f5744557e270a38192554c3126ea5f97434Tim Northover    }
204372062f5744557e270a38192554c3126ea5f97434Tim Northover  }
204472062f5744557e270a38192554c3126ea5f97434Tim Northover
204572062f5744557e270a38192554c3126ea5f97434Tim Northover  // Nothing more to check if the callee is taking no arguments
204672062f5744557e270a38192554c3126ea5f97434Tim Northover  if (Outs.empty())
204772062f5744557e270a38192554c3126ea5f97434Tim Northover    return true;
204872062f5744557e270a38192554c3126ea5f97434Tim Northover
204972062f5744557e270a38192554c3126ea5f97434Tim Northover  SmallVector<CCValAssign, 16> ArgLocs;
2050dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  CCState CCInfo(CalleeCC, isVarArg, DAG.getMachineFunction(),
205172062f5744557e270a38192554c3126ea5f97434Tim Northover                 getTargetMachine(), ArgLocs, *DAG.getContext());
205272062f5744557e270a38192554c3126ea5f97434Tim Northover
2053dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  CCInfo.AnalyzeCallOperands(Outs, CCAssignFnForCall(CalleeCC, isVarArg));
205472062f5744557e270a38192554c3126ea5f97434Tim Northover
2055dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  const AArch64FunctionInfo *FuncInfo = MF.getInfo<AArch64FunctionInfo>();
205672062f5744557e270a38192554c3126ea5f97434Tim Northover
205772062f5744557e270a38192554c3126ea5f97434Tim Northover  // If the stack arguments for this call would fit into our own save area then
205872062f5744557e270a38192554c3126ea5f97434Tim Northover  // the call can be made tail.
205972062f5744557e270a38192554c3126ea5f97434Tim Northover  return CCInfo.getNextStackOffset() <= FuncInfo->getBytesInStackArgArea();
206072062f5744557e270a38192554c3126ea5f97434Tim Northover}
206172062f5744557e270a38192554c3126ea5f97434Tim Northover
206272062f5744557e270a38192554c3126ea5f97434Tim NorthoverSDValue AArch64TargetLowering::addTokenForArgument(SDValue Chain,
206372062f5744557e270a38192554c3126ea5f97434Tim Northover                                                   SelectionDAG &DAG,
206472062f5744557e270a38192554c3126ea5f97434Tim Northover                                                   MachineFrameInfo *MFI,
206572062f5744557e270a38192554c3126ea5f97434Tim Northover                                                   int ClobberedFI) const {
206672062f5744557e270a38192554c3126ea5f97434Tim Northover  SmallVector<SDValue, 8> ArgChains;
206772062f5744557e270a38192554c3126ea5f97434Tim Northover  int64_t FirstByte = MFI->getObjectOffset(ClobberedFI);
206872062f5744557e270a38192554c3126ea5f97434Tim Northover  int64_t LastByte = FirstByte + MFI->getObjectSize(ClobberedFI) - 1;
206972062f5744557e270a38192554c3126ea5f97434Tim Northover
207072062f5744557e270a38192554c3126ea5f97434Tim Northover  // Include the original chain at the beginning of the list. When this is
207172062f5744557e270a38192554c3126ea5f97434Tim Northover  // used by target LowerCall hooks, this helps legalize find the
207272062f5744557e270a38192554c3126ea5f97434Tim Northover  // CALLSEQ_BEGIN node.
207372062f5744557e270a38192554c3126ea5f97434Tim Northover  ArgChains.push_back(Chain);
207472062f5744557e270a38192554c3126ea5f97434Tim Northover
207572062f5744557e270a38192554c3126ea5f97434Tim Northover  // Add a chain value for each stack argument corresponding
207672062f5744557e270a38192554c3126ea5f97434Tim Northover  for (SDNode::use_iterator U = DAG.getEntryNode().getNode()->use_begin(),
2077dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                            UE = DAG.getEntryNode().getNode()->use_end();
2078dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines       U != UE; ++U)
207972062f5744557e270a38192554c3126ea5f97434Tim Northover    if (LoadSDNode *L = dyn_cast<LoadSDNode>(*U))
208072062f5744557e270a38192554c3126ea5f97434Tim Northover      if (FrameIndexSDNode *FI = dyn_cast<FrameIndexSDNode>(L->getBasePtr()))
208172062f5744557e270a38192554c3126ea5f97434Tim Northover        if (FI->getIndex() < 0) {
208272062f5744557e270a38192554c3126ea5f97434Tim Northover          int64_t InFirstByte = MFI->getObjectOffset(FI->getIndex());
208372062f5744557e270a38192554c3126ea5f97434Tim Northover          int64_t InLastByte = InFirstByte;
208472062f5744557e270a38192554c3126ea5f97434Tim Northover          InLastByte += MFI->getObjectSize(FI->getIndex()) - 1;
208572062f5744557e270a38192554c3126ea5f97434Tim Northover
208672062f5744557e270a38192554c3126ea5f97434Tim Northover          if ((InFirstByte <= FirstByte && FirstByte <= InLastByte) ||
208772062f5744557e270a38192554c3126ea5f97434Tim Northover              (FirstByte <= InFirstByte && InFirstByte <= LastByte))
208872062f5744557e270a38192554c3126ea5f97434Tim Northover            ArgChains.push_back(SDValue(L, 1));
208972062f5744557e270a38192554c3126ea5f97434Tim Northover        }
209072062f5744557e270a38192554c3126ea5f97434Tim Northover
2091dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Build a tokenfactor for all the chains.
2092dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return DAG.getNode(ISD::TokenFactor, SDLoc(Chain), MVT::Other, ArgChains);
209372062f5744557e270a38192554c3126ea5f97434Tim Northover}
209472062f5744557e270a38192554c3126ea5f97434Tim Northover
2095dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesbool AArch64TargetLowering::DoesCalleeRestoreStack(CallingConv::ID CallCC,
2096dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                                   bool TailCallOpt) const {
2097dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return CallCC == CallingConv::Fast && TailCallOpt;
209872062f5744557e270a38192554c3126ea5f97434Tim Northover}
209972062f5744557e270a38192554c3126ea5f97434Tim Northover
2100dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesbool AArch64TargetLowering::IsTailCallConvention(CallingConv::ID CallCC) const {
2101dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return CallCC == CallingConv::Fast;
2102dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
210372062f5744557e270a38192554c3126ea5f97434Tim Northover
2104dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// LowerCall - Lower a call to a callseq_start + CALL + callseq_end chain,
2105dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// and add input and output parameter nodes.
2106dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue
2107dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesAArch64TargetLowering::LowerCall(CallLoweringInfo &CLI,
2108dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                 SmallVectorImpl<SDValue> &InVals) const {
2109dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SelectionDAG &DAG = CLI.DAG;
2110dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc &DL = CLI.DL;
2111dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SmallVector<ISD::OutputArg, 32> &Outs = CLI.Outs;
2112dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SmallVector<SDValue, 32> &OutVals = CLI.OutVals;
2113dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SmallVector<ISD::InputArg, 32> &Ins = CLI.Ins;
2114dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Chain = CLI.Chain;
2115dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Callee = CLI.Callee;
2116dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  bool &IsTailCall = CLI.IsTailCall;
2117dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  CallingConv::ID CallConv = CLI.CallConv;
2118dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  bool IsVarArg = CLI.IsVarArg;
211972062f5744557e270a38192554c3126ea5f97434Tim Northover
2120dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  MachineFunction &MF = DAG.getMachineFunction();
2121dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  bool IsStructRet = (Outs.empty()) ? false : Outs[0].Flags.isSRet();
2122dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  bool IsThisReturn = false;
212372062f5744557e270a38192554c3126ea5f97434Tim Northover
2124dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  AArch64FunctionInfo *FuncInfo = MF.getInfo<AArch64FunctionInfo>();
2125dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  bool TailCallOpt = MF.getTarget().Options.GuaranteedTailCallOpt;
2126dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  bool IsSibCall = false;
212772062f5744557e270a38192554c3126ea5f97434Tim Northover
2128dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (IsTailCall) {
2129dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Check if it's really possible to do a tail call.
2130dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    IsTailCall = isEligibleForTailCallOptimization(
2131dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        Callee, CallConv, IsVarArg, IsStructRet,
2132dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        MF.getFunction()->hasStructRetAttr(), Outs, OutVals, Ins, DAG);
2133dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (!IsTailCall && CLI.CS && CLI.CS->isMustTailCall())
2134dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      report_fatal_error("failed to perform tail call elimination on a call "
2135dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                         "site marked musttail");
2136dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2137dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // A sibling call is one where we're under the usual C ABI and not planning
2138dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // to change that but can still do a tail call:
2139dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (!TailCallOpt && IsTailCall)
2140dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      IsSibCall = true;
2141dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2142dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (IsTailCall)
2143dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      ++NumTailCalls;
214472062f5744557e270a38192554c3126ea5f97434Tim Northover  }
214572062f5744557e270a38192554c3126ea5f97434Tim Northover
2146dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Analyze operands of the call, assigning locations to each operand.
2147dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SmallVector<CCValAssign, 16> ArgLocs;
2148dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  CCState CCInfo(CallConv, IsVarArg, DAG.getMachineFunction(),
2149dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                 getTargetMachine(), ArgLocs, *DAG.getContext());
215072062f5744557e270a38192554c3126ea5f97434Tim Northover
2151dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (IsVarArg) {
2152dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Handle fixed and variable vector arguments differently.
2153dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Variable vector arguments always go into memory.
2154dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned NumArgs = Outs.size();
2155dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2156dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    for (unsigned i = 0; i != NumArgs; ++i) {
2157dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      MVT ArgVT = Outs[i].VT;
2158dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      ISD::ArgFlagsTy ArgFlags = Outs[i].Flags;
2159dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      CCAssignFn *AssignFn = CCAssignFnForCall(CallConv,
2160dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                               /*IsVarArg=*/ !Outs[i].IsFixed);
2161dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      bool Res = AssignFn(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, CCInfo);
2162dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      assert(!Res && "Call operand has unhandled type");
2163dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      (void)Res;
2164dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
2165dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  } else {
2166dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // At this point, Outs[].VT may already be promoted to i32. To correctly
2167dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // handle passing i8 as i8 instead of i32 on stack, we pass in both i32 and
2168dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // i8 to CC_AArch64_AAPCS with i32 being ValVT and i8 being LocVT.
2169dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Since AnalyzeCallOperands uses Ins[].VT for both ValVT and LocVT, here
2170dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // we use a special version of AnalyzeCallOperands to pass in ValVT and
2171dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // LocVT.
2172dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned NumArgs = Outs.size();
2173dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    for (unsigned i = 0; i != NumArgs; ++i) {
2174dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      MVT ValVT = Outs[i].VT;
2175dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // Get type of the original argument.
2176dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      EVT ActualVT = getValueType(CLI.getArgs()[Outs[i].OrigArgIndex].Ty,
2177dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  /*AllowUnknown*/ true);
2178dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      MVT ActualMVT = ActualVT.isSimple() ? ActualVT.getSimpleVT() : ValVT;
2179dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      ISD::ArgFlagsTy ArgFlags = Outs[i].Flags;
2180dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // If ActualMVT is i1/i8/i16, we should set LocVT to i8/i8/i16.
2181dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (ActualMVT == MVT::i1 || ActualMVT == MVT::i8)
2182dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        ValVT = MVT::i8;
2183dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      else if (ActualMVT == MVT::i16)
2184dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        ValVT = MVT::i16;
2185dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2186dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      CCAssignFn *AssignFn = CCAssignFnForCall(CallConv, /*IsVarArg=*/false);
2187dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      bool Res = AssignFn(i, ValVT, ValVT, CCValAssign::Full, ArgFlags, CCInfo);
2188dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      assert(!Res && "Call operand has unhandled type");
2189dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      (void)Res;
2190dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
2191dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
219272062f5744557e270a38192554c3126ea5f97434Tim Northover
2193dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Get a count of how many bytes are to be pushed on the stack.
2194dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned NumBytes = CCInfo.getNextStackOffset();
2195dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2196dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (IsSibCall) {
2197dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Since we're not changing the ABI to make this a tail call, the memory
2198dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // operands are already available in the caller's incoming argument space.
2199dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    NumBytes = 0;
220072062f5744557e270a38192554c3126ea5f97434Tim Northover  }
220172062f5744557e270a38192554c3126ea5f97434Tim Northover
2202dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // FPDiff is the byte offset of the call's argument area from the callee's.
2203dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Stores to callee stack arguments will be placed in FixedStackSlots offset
2204dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // by this amount for a tail call. In a sibling call it must be 0 because the
2205dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // caller will deallocate the entire stack and the callee still expects its
2206dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // arguments to begin at SP+0. Completely unused for non-tail calls.
2207dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  int FPDiff = 0;
220872062f5744557e270a38192554c3126ea5f97434Tim Northover
2209dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (IsTailCall && !IsSibCall) {
2210dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned NumReusableBytes = FuncInfo->getBytesInStackArgArea();
2211dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2212dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Since callee will pop argument stack as a tail call, we must keep the
2213dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // popped size 16-byte aligned.
2214dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    NumBytes = RoundUpToAlignment(NumBytes, 16);
2215dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2216dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // FPDiff will be negative if this tail call requires more space than we
2217dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // would automatically have in our incoming argument space. Positive if we
2218dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // can actually shrink the stack.
2219dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    FPDiff = NumReusableBytes - NumBytes;
2220dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2221dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // The stack pointer must be 16-byte aligned at all times it's used for a
2222dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // memory operation, which in practice means at *all* times and in
2223dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // particular across call boundaries. Therefore our own arguments started at
2224dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // a 16-byte aligned SP and the delta applied for the tail call should
2225dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // satisfy the same constraint.
2226dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    assert(FPDiff % 16 == 0 && "unaligned stack on tail call");
2227b2efdde06c00023287255d9a09861e43fb5efebdTim Northover  }
222872062f5744557e270a38192554c3126ea5f97434Tim Northover
2229dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Adjust the stack pointer for the new arguments...
2230dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // These operations are automatically eliminated by the prolog/epilog pass
2231dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!IsSibCall)
2232dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Chain =
2233dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        DAG.getCALLSEQ_START(Chain, DAG.getIntPtrConstant(NumBytes, true), DL);
223472062f5744557e270a38192554c3126ea5f97434Tim Northover
2235dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue StackPtr = DAG.getCopyFromReg(Chain, DL, AArch64::SP, getPointerTy());
223672062f5744557e270a38192554c3126ea5f97434Tim Northover
2237dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SmallVector<std::pair<unsigned, SDValue>, 8> RegsToPass;
2238dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SmallVector<SDValue, 8> MemOpChains;
223972062f5744557e270a38192554c3126ea5f97434Tim Northover
2240dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Walk the register/memloc assignments, inserting copies/loads.
2241dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  for (unsigned i = 0, realArgIdx = 0, e = ArgLocs.size(); i != e;
2242dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines       ++i, ++realArgIdx) {
2243dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    CCValAssign &VA = ArgLocs[i];
2244dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue Arg = OutVals[realArgIdx];
2245dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    ISD::ArgFlagsTy Flags = Outs[realArgIdx].Flags;
224672062f5744557e270a38192554c3126ea5f97434Tim Northover
2247dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Promote the value if needed.
2248dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    switch (VA.getLocInfo()) {
2249dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    default:
2250dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      llvm_unreachable("Unknown loc info!");
2251dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case CCValAssign::Full:
2252dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      break;
2253dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case CCValAssign::SExt:
2254dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Arg = DAG.getNode(ISD::SIGN_EXTEND, DL, VA.getLocVT(), Arg);
2255dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      break;
2256dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case CCValAssign::ZExt:
2257dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Arg = DAG.getNode(ISD::ZERO_EXTEND, DL, VA.getLocVT(), Arg);
2258dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      break;
2259dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case CCValAssign::AExt:
2260dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (Outs[realArgIdx].ArgVT == MVT::i1) {
2261dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // AAPCS requires i1 to be zero-extended to 8-bits by the caller.
2262dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        Arg = DAG.getNode(ISD::TRUNCATE, DL, MVT::i1, Arg);
2263dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        Arg = DAG.getNode(ISD::ZERO_EXTEND, DL, MVT::i8, Arg);
2264dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
2265dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Arg = DAG.getNode(ISD::ANY_EXTEND, DL, VA.getLocVT(), Arg);
2266dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      break;
2267dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case CCValAssign::BCvt:
2268dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Arg = DAG.getNode(ISD::BITCAST, DL, VA.getLocVT(), Arg);
2269dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      break;
2270dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case CCValAssign::FPExt:
2271dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Arg = DAG.getNode(ISD::FP_EXTEND, DL, VA.getLocVT(), Arg);
2272dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      break;
2273dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
227472062f5744557e270a38192554c3126ea5f97434Tim Northover
2275dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (VA.isRegLoc()) {
2276dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (realArgIdx == 0 && Flags.isReturned() && Outs[0].VT == MVT::i64) {
2277dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        assert(VA.getLocVT() == MVT::i64 &&
2278dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines               "unexpected calling convention register assignment");
2279dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        assert(!Ins.empty() && Ins[0].VT == MVT::i64 &&
2280dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines               "unexpected use of 'returned'");
2281dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        IsThisReturn = true;
2282dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
2283dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
2284dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    } else {
2285dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      assert(VA.isMemLoc());
228672062f5744557e270a38192554c3126ea5f97434Tim Northover
2287dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      SDValue DstAddr;
2288dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      MachinePointerInfo DstInfo;
228972062f5744557e270a38192554c3126ea5f97434Tim Northover
2290dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // FIXME: This works on big-endian for composite byvals, which are the
2291dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // common case. It should also work for fundamental types too.
2292dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      uint32_t BEAlign = 0;
2293dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      unsigned OpSize = Flags.isByVal() ? Flags.getByValSize() * 8
2294dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                        : VA.getLocVT().getSizeInBits();
2295dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      OpSize = (OpSize + 7) / 8;
2296dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (!Subtarget->isLittleEndian() && !Flags.isByVal()) {
2297dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        if (OpSize < 8)
2298dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          BEAlign = 8 - OpSize;
2299dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
2300dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      unsigned LocMemOffset = VA.getLocMemOffset();
2301dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      int32_t Offset = LocMemOffset + BEAlign;
2302dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      SDValue PtrOff = DAG.getIntPtrConstant(Offset);
2303dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      PtrOff = DAG.getNode(ISD::ADD, DL, getPointerTy(), StackPtr, PtrOff);
2304dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2305dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (IsTailCall) {
2306dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        Offset = Offset + FPDiff;
2307dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        int FI = MF.getFrameInfo()->CreateFixedObject(OpSize, Offset, true);
2308dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2309dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        DstAddr = DAG.getFrameIndex(FI, getPointerTy());
2310dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        DstInfo = MachinePointerInfo::getFixedStack(FI);
2311dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2312dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // Make sure any stack arguments overlapping with where we're storing
2313dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // are loaded before this eventual operation. Otherwise they'll be
2314dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // clobbered.
2315dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        Chain = addTokenForArgument(Chain, DAG, MF.getFrameInfo(), FI);
2316dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      } else {
2317dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue PtrOff = DAG.getIntPtrConstant(Offset);
2318dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2319dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        DstAddr = DAG.getNode(ISD::ADD, DL, getPointerTy(), StackPtr, PtrOff);
2320dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        DstInfo = MachinePointerInfo::getStack(LocMemOffset);
2321dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
2322dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2323dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (Outs[i].Flags.isByVal()) {
2324dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue SizeNode =
2325dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines            DAG.getConstant(Outs[i].Flags.getByValSize(), MVT::i64);
2326dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue Cpy = DAG.getMemcpy(
2327dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines            Chain, DL, DstAddr, Arg, SizeNode, Outs[i].Flags.getByValAlign(),
2328dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines            /*isVolatile = */ false,
2329dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines            /*alwaysInline = */ false, DstInfo, MachinePointerInfo());
2330dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2331dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        MemOpChains.push_back(Cpy);
2332dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      } else {
2333dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // Since we pass i1/i8/i16 as i1/i8/i16 on stack and Arg is already
2334dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // promoted to a legal register type i32, we should truncate Arg back to
2335dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // i1/i8/i16.
2336cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines        if (VA.getValVT() == MVT::i1 || VA.getValVT() == MVT::i8 ||
2337cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines            VA.getValVT() == MVT::i16)
2338cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines          Arg = DAG.getNode(ISD::TRUNCATE, DL, VA.getValVT(), Arg);
2339dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2340dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue Store =
2341dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines            DAG.getStore(Chain, DL, Arg, DstAddr, DstInfo, false, false, 0);
2342dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        MemOpChains.push_back(Store);
2343dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
234472062f5744557e270a38192554c3126ea5f97434Tim Northover    }
234572062f5744557e270a38192554c3126ea5f97434Tim Northover  }
234672062f5744557e270a38192554c3126ea5f97434Tim Northover
2347dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!MemOpChains.empty())
2348dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Chain = DAG.getNode(ISD::TokenFactor, DL, MVT::Other, MemOpChains);
234972062f5744557e270a38192554c3126ea5f97434Tim Northover
2350dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Build a sequence of copy-to-reg nodes chained together with token chain
2351dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // and flag operands which copy the outgoing args into the appropriate regs.
2352dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue InFlag;
2353dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
2354dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Chain = DAG.getCopyToReg(Chain, DL, RegsToPass[i].first,
2355dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                             RegsToPass[i].second, InFlag);
2356dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    InFlag = Chain.getValue(1);
2357dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
235872062f5744557e270a38192554c3126ea5f97434Tim Northover
2359dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // If the callee is a GlobalAddress/ExternalSymbol node (quite common, every
2360dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // direct call is) turn it into a TargetGlobalAddress/TargetExternalSymbol
2361dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // node so that legalize doesn't hack it.
2362dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (getTargetMachine().getCodeModel() == CodeModel::Large &&
2363dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Subtarget->isTargetMachO()) {
2364dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
2365dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      const GlobalValue *GV = G->getGlobal();
2366dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      bool InternalLinkage = GV->hasInternalLinkage();
2367dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (InternalLinkage)
2368dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        Callee = DAG.getTargetGlobalAddress(GV, DL, getPointerTy(), 0, 0);
2369dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      else {
2370dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        Callee = DAG.getTargetGlobalAddress(GV, DL, getPointerTy(), 0,
2371dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                            AArch64II::MO_GOT);
2372dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        Callee = DAG.getNode(AArch64ISD::LOADgot, DL, getPointerTy(), Callee);
2373dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
2374dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    } else if (ExternalSymbolSDNode *S =
2375dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                   dyn_cast<ExternalSymbolSDNode>(Callee)) {
2376dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      const char *Sym = S->getSymbol();
2377dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Callee =
2378dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          DAG.getTargetExternalSymbol(Sym, getPointerTy(), AArch64II::MO_GOT);
2379dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Callee = DAG.getNode(AArch64ISD::LOADgot, DL, getPointerTy(), Callee);
2380dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
2381dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  } else if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
2382dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    const GlobalValue *GV = G->getGlobal();
2383dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Callee = DAG.getTargetGlobalAddress(GV, DL, getPointerTy(), 0, 0);
2384dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  } else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee)) {
2385dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    const char *Sym = S->getSymbol();
2386dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Callee = DAG.getTargetExternalSymbol(Sym, getPointerTy(), 0);
238772062f5744557e270a38192554c3126ea5f97434Tim Northover  }
238872062f5744557e270a38192554c3126ea5f97434Tim Northover
2389dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // We don't usually want to end the call-sequence here because we would tidy
2390dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // the frame up *after* the call, however in the ABI-changing tail-call case
2391dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // we've carefully laid out the parameters so that when sp is reset they'll be
2392dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // in the correct location.
2393dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (IsTailCall && !IsSibCall) {
2394dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(NumBytes, true),
2395dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                               DAG.getIntPtrConstant(0, true), InFlag, DL);
2396dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    InFlag = Chain.getValue(1);
2397dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
239872062f5744557e270a38192554c3126ea5f97434Tim Northover
2399dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  std::vector<SDValue> Ops;
2400dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Ops.push_back(Chain);
2401dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Ops.push_back(Callee);
240272062f5744557e270a38192554c3126ea5f97434Tim Northover
2403dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (IsTailCall) {
2404dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Each tail call may have to adjust the stack by a different amount, so
2405dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // this information must travel along with the operation for eventual
2406dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // consumption by emitEpilogue.
2407dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Ops.push_back(DAG.getTargetConstant(FPDiff, MVT::i32));
240872062f5744557e270a38192554c3126ea5f97434Tim Northover  }
240972062f5744557e270a38192554c3126ea5f97434Tim Northover
2410dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Add argument registers to the end of the list so that they are known live
2411dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // into the call.
2412dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
2413dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Ops.push_back(DAG.getRegister(RegsToPass[i].first,
2414dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  RegsToPass[i].second.getValueType()));
241572062f5744557e270a38192554c3126ea5f97434Tim Northover
2416dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Add a register mask operand representing the call-preserved registers.
2417dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  const uint32_t *Mask;
2418dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  const TargetRegisterInfo *TRI = getTargetMachine().getRegisterInfo();
2419dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  const AArch64RegisterInfo *ARI =
2420dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      static_cast<const AArch64RegisterInfo *>(TRI);
2421dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (IsThisReturn) {
2422dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // For 'this' returns, use the X0-preserving mask if applicable
2423dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Mask = ARI->getThisReturnPreservedMask(CallConv);
2424dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (!Mask) {
2425dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      IsThisReturn = false;
2426dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Mask = ARI->getCallPreservedMask(CallConv);
2427dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
2428dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  } else
2429dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Mask = ARI->getCallPreservedMask(CallConv);
243072062f5744557e270a38192554c3126ea5f97434Tim Northover
2431dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  assert(Mask && "Missing call preserved mask for calling convention");
2432dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Ops.push_back(DAG.getRegisterMask(Mask));
243372062f5744557e270a38192554c3126ea5f97434Tim Northover
2434dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (InFlag.getNode())
2435dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Ops.push_back(InFlag);
243672062f5744557e270a38192554c3126ea5f97434Tim Northover
2437dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
243872062f5744557e270a38192554c3126ea5f97434Tim Northover
2439dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // If we're doing a tall call, use a TC_RETURN here rather than an
2440dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // actual call instruction.
2441dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (IsTailCall)
2442dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::TC_RETURN, DL, NodeTys, Ops);
244372062f5744557e270a38192554c3126ea5f97434Tim Northover
2444dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Returns a chain and a flag for retval copy to use.
2445dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Chain = DAG.getNode(AArch64ISD::CALL, DL, NodeTys, Ops);
2446dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  InFlag = Chain.getValue(1);
244772062f5744557e270a38192554c3126ea5f97434Tim Northover
2448dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  uint64_t CalleePopBytes = DoesCalleeRestoreStack(CallConv, TailCallOpt)
2449dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                ? RoundUpToAlignment(NumBytes, 16)
2450dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                : 0;
245172062f5744557e270a38192554c3126ea5f97434Tim Northover
2452dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(NumBytes, true),
2453dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                             DAG.getIntPtrConstant(CalleePopBytes, true),
2454dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                             InFlag, DL);
2455dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!Ins.empty())
2456dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    InFlag = Chain.getValue(1);
245772062f5744557e270a38192554c3126ea5f97434Tim Northover
2458dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Handle result values, copying them out of physregs into vregs that we
2459dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // return.
2460dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return LowerCallResult(Chain, InFlag, CallConv, IsVarArg, Ins, DL, DAG,
2461dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                         InVals, IsThisReturn,
2462dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                         IsThisReturn ? OutVals[0] : SDValue());
2463dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
246472062f5744557e270a38192554c3126ea5f97434Tim Northover
2465dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesbool AArch64TargetLowering::CanLowerReturn(
2466dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    CallingConv::ID CallConv, MachineFunction &MF, bool isVarArg,
2467dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    const SmallVectorImpl<ISD::OutputArg> &Outs, LLVMContext &Context) const {
2468dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  CCAssignFn *RetCC = CallConv == CallingConv::WebKit_JS
2469dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                          ? RetCC_AArch64_WebKit_JS
2470dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                          : RetCC_AArch64_AAPCS;
2471dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SmallVector<CCValAssign, 16> RVLocs;
2472dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  CCState CCInfo(CallConv, isVarArg, MF, getTargetMachine(), RVLocs, Context);
2473dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return CCInfo.CheckReturn(Outs, RetCC);
247472062f5744557e270a38192554c3126ea5f97434Tim Northover}
247572062f5744557e270a38192554c3126ea5f97434Tim Northover
247672062f5744557e270a38192554c3126ea5f97434Tim NorthoverSDValue
2477dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesAArch64TargetLowering::LowerReturn(SDValue Chain, CallingConv::ID CallConv,
2478dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                   bool isVarArg,
2479dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                   const SmallVectorImpl<ISD::OutputArg> &Outs,
2480dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                   const SmallVectorImpl<SDValue> &OutVals,
2481dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                   SDLoc DL, SelectionDAG &DAG) const {
2482dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  CCAssignFn *RetCC = CallConv == CallingConv::WebKit_JS
2483dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                          ? RetCC_AArch64_WebKit_JS
2484dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                          : RetCC_AArch64_AAPCS;
2485dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SmallVector<CCValAssign, 16> RVLocs;
2486dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
2487dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                 getTargetMachine(), RVLocs, *DAG.getContext());
2488dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  CCInfo.AnalyzeReturn(Outs, RetCC);
248972062f5744557e270a38192554c3126ea5f97434Tim Northover
2490dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Copy the result values into the output registers.
2491dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Flag;
2492dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SmallVector<SDValue, 4> RetOps(1, Chain);
2493dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  for (unsigned i = 0, realRVLocIdx = 0; i != RVLocs.size();
2494dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines       ++i, ++realRVLocIdx) {
2495dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    CCValAssign &VA = RVLocs[i];
2496dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    assert(VA.isRegLoc() && "Can only return in registers!");
2497dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue Arg = OutVals[realRVLocIdx];
249872062f5744557e270a38192554c3126ea5f97434Tim Northover
2499dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    switch (VA.getLocInfo()) {
2500dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    default:
2501dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      llvm_unreachable("Unknown loc info!");
2502dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case CCValAssign::Full:
2503dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (Outs[i].ArgVT == MVT::i1) {
2504dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // AAPCS requires i1 to be zero-extended to i8 by the producer of the
2505dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // value. This is strictly redundant on Darwin (which uses "zeroext
2506dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // i1"), but will be optimised out before ISel.
2507dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        Arg = DAG.getNode(ISD::TRUNCATE, DL, MVT::i1, Arg);
2508dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        Arg = DAG.getNode(ISD::ZERO_EXTEND, DL, VA.getLocVT(), Arg);
2509dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
2510dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      break;
2511dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case CCValAssign::BCvt:
2512dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Arg = DAG.getNode(ISD::BITCAST, DL, VA.getLocVT(), Arg);
2513dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      break;
2514dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
251572062f5744557e270a38192554c3126ea5f97434Tim Northover
2516dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Chain = DAG.getCopyToReg(Chain, DL, VA.getLocReg(), Arg, Flag);
2517dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Flag = Chain.getValue(1);
2518dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    RetOps.push_back(DAG.getRegister(VA.getLocReg(), VA.getLocVT()));
251936b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines  }
252036b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
2521dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  RetOps[0] = Chain; // Update chain.
252236b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
2523dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Add the flag if we have it.
2524dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Flag.getNode())
2525dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    RetOps.push_back(Flag);
252636b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
2527dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return DAG.getNode(AArch64ISD::RET_FLAG, DL, MVT::Other, RetOps);
2528dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
252936b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
2530dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//===----------------------------------------------------------------------===//
2531dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//  Other Lowering Code
2532dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//===----------------------------------------------------------------------===//
2533dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2534dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::LowerGlobalAddress(SDValue Op,
2535dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                                  SelectionDAG &DAG) const {
2536dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT PtrVT = getPointerTy();
253736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines  SDLoc DL(Op);
2538dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
2539dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned char OpFlags =
2540dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Subtarget->ClassifyGlobalReference(GV, getTargetMachine());
2541dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2542dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  assert(cast<GlobalAddressSDNode>(Op)->getOffset() == 0 &&
2543dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines         "unexpected offset in global node");
2544dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2545dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // This also catched the large code model case for Darwin.
2546dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if ((OpFlags & AArch64II::MO_GOT) != 0) {
2547dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue GotAddr = DAG.getTargetGlobalAddress(GV, DL, PtrVT, 0, OpFlags);
2548dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // FIXME: Once remat is capable of dealing with instructions with register
2549dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // operands, expand this into two nodes instead of using a wrapper node.
2550dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::LOADgot, DL, PtrVT, GotAddr);
2551dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
2552dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2553dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (getTargetMachine().getCodeModel() == CodeModel::Large) {
2554dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    const unsigned char MO_NC = AArch64II::MO_NC;
2555dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(
2556dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        AArch64ISD::WrapperLarge, DL, PtrVT,
2557dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        DAG.getTargetGlobalAddress(GV, DL, PtrVT, 0, AArch64II::MO_G3),
2558dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        DAG.getTargetGlobalAddress(GV, DL, PtrVT, 0, AArch64II::MO_G2 | MO_NC),
2559dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        DAG.getTargetGlobalAddress(GV, DL, PtrVT, 0, AArch64II::MO_G1 | MO_NC),
2560dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        DAG.getTargetGlobalAddress(GV, DL, PtrVT, 0, AArch64II::MO_G0 | MO_NC));
2561dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  } else {
2562dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Use ADRP/ADD or ADRP/LDR for everything else: the small model on ELF and
2563dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // the only correct model on Darwin.
2564dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue Hi = DAG.getTargetGlobalAddress(GV, DL, PtrVT, 0,
2565dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                            OpFlags | AArch64II::MO_PAGE);
2566dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned char LoFlags = OpFlags | AArch64II::MO_PAGEOFF | AArch64II::MO_NC;
2567dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue Lo = DAG.getTargetGlobalAddress(GV, DL, PtrVT, 0, LoFlags);
2568dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2569dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue ADRP = DAG.getNode(AArch64ISD::ADRP, DL, PtrVT, Hi);
2570dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::ADDlow, DL, PtrVT, ADRP, Lo);
2571dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
257236b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines}
257336b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
2574dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// \brief Convert a TLS address reference into the correct sequence of loads
2575dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// and calls to compute the variable's address (for Darwin, currently) and
2576dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// return an SDValue containing the final node.
2577dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2578dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// Darwin only has one TLS scheme which must be capable of dealing with the
2579dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// fully general situation, in the worst case. This means:
2580dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines///     + "extern __thread" declaration.
2581dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines///     + Defined in a possibly unknown dynamic library.
2582dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines///
2583dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// The general system is that each __thread variable has a [3 x i64] descriptor
2584dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// which contains information used by the runtime to calculate the address. The
2585dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// only part of this the compiler needs to know about is the first xword, which
2586dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// contains a function pointer that must be called with the address of the
2587dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// entire descriptor in "x0".
2588dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines///
2589dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// Since this descriptor may be in a different unit, in general even the
2590dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// descriptor must be accessed via an indirect load. The "ideal" code sequence
2591dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// is:
2592dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines///     adrp x0, _var@TLVPPAGE
2593dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines///     ldr x0, [x0, _var@TLVPPAGEOFF]   ; x0 now contains address of descriptor
2594dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines///     ldr x1, [x0]                     ; x1 contains 1st entry of descriptor,
2595dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines///                                      ; the function pointer
2596dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines///     blr x1                           ; Uses descriptor address in x0
2597dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines///     ; Address of _var is now in x0.
2598dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines///
2599dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// If the address of _var's descriptor *is* known to the linker, then it can
2600dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// change the first "ldr" instruction to an appropriate "add x0, x0, #imm" for
2601dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// a slight efficiency gain.
260272062f5744557e270a38192554c3126ea5f97434Tim NorthoverSDValue
2603dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesAArch64TargetLowering::LowerDarwinGlobalTLSAddress(SDValue Op,
2604dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                                   SelectionDAG &DAG) const {
2605dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  assert(Subtarget->isTargetDarwin() && "TLS only supported on Darwin");
2606160a14e2b1b3bfd2bd67cb03a7ae213fb35211ccWeiming Zhao
2607dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc DL(Op);
2608dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  MVT PtrVT = getPointerTy();
2609dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
2610160a14e2b1b3bfd2bd67cb03a7ae213fb35211ccWeiming Zhao
2611dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue TLVPAddr =
2612dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      DAG.getTargetGlobalAddress(GV, DL, PtrVT, 0, AArch64II::MO_TLS);
2613dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue DescAddr = DAG.getNode(AArch64ISD::LOADgot, DL, PtrVT, TLVPAddr);
2614160a14e2b1b3bfd2bd67cb03a7ae213fb35211ccWeiming Zhao
2615dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // The first entry in the descriptor is a function pointer that we must call
2616dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // to obtain the address of the variable.
2617dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Chain = DAG.getEntryNode();
2618dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue FuncTLVGet =
2619dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      DAG.getLoad(MVT::i64, DL, Chain, DescAddr, MachinePointerInfo::getGOT(),
2620dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                  false, true, true, 8);
2621dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Chain = FuncTLVGet.getValue(1);
2622160a14e2b1b3bfd2bd67cb03a7ae213fb35211ccWeiming Zhao
2623160a14e2b1b3bfd2bd67cb03a7ae213fb35211ccWeiming Zhao  MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
2624dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  MFI->setAdjustsStack(true);
262572062f5744557e270a38192554c3126ea5f97434Tim Northover
2626dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // TLS calls preserve all registers except those that absolutely must be
2627dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // trashed: X0 (it takes an argument), LR (it's a call) and NZCV (let's not be
2628dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // silly).
2629dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  const TargetRegisterInfo *TRI = getTargetMachine().getRegisterInfo();
2630dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  const AArch64RegisterInfo *ARI =
2631dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      static_cast<const AArch64RegisterInfo *>(TRI);
2632dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  const uint32_t *Mask = ARI->getTLSCallPreservedMask();
2633dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2634dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Finally, we can make the call. This is just a degenerate version of a
2635dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // normal AArch64 call node: x0 takes the address of the descriptor, and
2636dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // returns the address of the variable in this thread.
2637dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Chain = DAG.getCopyToReg(Chain, DL, AArch64::X0, DescAddr, SDValue());
2638dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Chain =
2639dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      DAG.getNode(AArch64ISD::CALL, DL, DAG.getVTList(MVT::Other, MVT::Glue),
2640dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                  Chain, FuncTLVGet, DAG.getRegister(AArch64::X0, MVT::i64),
2641dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                  DAG.getRegisterMask(Mask), Chain.getValue(1));
2642dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return DAG.getCopyFromReg(Chain, DL, AArch64::X0, PtrVT, Chain.getValue(1));
264336b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines}
264436b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
2645dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// When accessing thread-local variables under either the general-dynamic or
2646dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// local-dynamic system, we make a "TLS-descriptor" call. The variable will
2647dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// have a descriptor, accessible via a PC-relative ADRP, and whose first entry
2648dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// is a function pointer to carry out the resolution. This function takes the
2649dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// address of the descriptor in X0 and returns the TPIDR_EL0 offset in X0. All
2650dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// other registers (except LR, NZCV) are preserved.
2651dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines///
2652dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// Thus, the ideal call sequence on AArch64 is:
2653dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines///
2654dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines///     adrp x0, :tlsdesc:thread_var
2655dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines///     ldr x8, [x0, :tlsdesc_lo12:thread_var]
2656dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines///     add x0, x0, :tlsdesc_lo12:thread_var
2657dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines///     .tlsdesccall thread_var
2658dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines///     blr x8
2659dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines///     (TPIDR_EL0 offset now in x0).
2660dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines///
2661dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// The ".tlsdesccall" directive instructs the assembler to insert a particular
2662dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// relocation to help the linker relax this sequence if it turns out to be too
2663dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// conservative.
2664dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines///
2665dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// FIXME: we currently produce an extra, duplicated, ADRP instruction, but this
2666dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// is harmless.
2667dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::LowerELFTLSDescCall(SDValue SymAddr,
2668dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                                   SDValue DescAddr, SDLoc DL,
2669dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                                   SelectionDAG &DAG) const {
267072062f5744557e270a38192554c3126ea5f97434Tim Northover  EVT PtrVT = getPointerTy();
267172062f5744557e270a38192554c3126ea5f97434Tim Northover
267272062f5744557e270a38192554c3126ea5f97434Tim Northover  // The function we need to call is simply the first entry in the GOT for this
267372062f5744557e270a38192554c3126ea5f97434Tim Northover  // descriptor, load it in preparation.
2674dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Func = DAG.getNode(AArch64ISD::LOADgot, DL, PtrVT, SymAddr);
2675dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2676dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // TLS calls preserve all registers except those that absolutely must be
2677dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // trashed: X0 (it takes an argument), LR (it's a call) and NZCV (let's not be
2678dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // silly).
2679dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  const TargetRegisterInfo *TRI = getTargetMachine().getRegisterInfo();
2680dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  const AArch64RegisterInfo *ARI =
2681dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      static_cast<const AArch64RegisterInfo *>(TRI);
2682dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  const uint32_t *Mask = ARI->getTLSCallPreservedMask();
268372062f5744557e270a38192554c3126ea5f97434Tim Northover
268472062f5744557e270a38192554c3126ea5f97434Tim Northover  // The function takes only one argument: the address of the descriptor itself
268572062f5744557e270a38192554c3126ea5f97434Tim Northover  // in X0.
2686dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Glue, Chain;
268772062f5744557e270a38192554c3126ea5f97434Tim Northover  Chain = DAG.getCopyToReg(DAG.getEntryNode(), DL, AArch64::X0, DescAddr, Glue);
268872062f5744557e270a38192554c3126ea5f97434Tim Northover  Glue = Chain.getValue(1);
268972062f5744557e270a38192554c3126ea5f97434Tim Northover
269072062f5744557e270a38192554c3126ea5f97434Tim Northover  // We're now ready to populate the argument list, as with a normal call:
2691dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SmallVector<SDValue, 6> Ops;
269272062f5744557e270a38192554c3126ea5f97434Tim Northover  Ops.push_back(Chain);
269372062f5744557e270a38192554c3126ea5f97434Tim Northover  Ops.push_back(Func);
269472062f5744557e270a38192554c3126ea5f97434Tim Northover  Ops.push_back(SymAddr);
269572062f5744557e270a38192554c3126ea5f97434Tim Northover  Ops.push_back(DAG.getRegister(AArch64::X0, PtrVT));
269672062f5744557e270a38192554c3126ea5f97434Tim Northover  Ops.push_back(DAG.getRegisterMask(Mask));
269772062f5744557e270a38192554c3126ea5f97434Tim Northover  Ops.push_back(Glue);
269872062f5744557e270a38192554c3126ea5f97434Tim Northover
269972062f5744557e270a38192554c3126ea5f97434Tim Northover  SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
2700dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Chain = DAG.getNode(AArch64ISD::TLSDESC_CALL, DL, NodeTys, Ops);
270172062f5744557e270a38192554c3126ea5f97434Tim Northover  Glue = Chain.getValue(1);
270272062f5744557e270a38192554c3126ea5f97434Tim Northover
270372062f5744557e270a38192554c3126ea5f97434Tim Northover  return DAG.getCopyFromReg(Chain, DL, AArch64::X0, PtrVT, Glue);
270472062f5744557e270a38192554c3126ea5f97434Tim Northover}
270572062f5744557e270a38192554c3126ea5f97434Tim Northover
270672062f5744557e270a38192554c3126ea5f97434Tim NorthoverSDValue
2707dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesAArch64TargetLowering::LowerELFGlobalTLSAddress(SDValue Op,
2708dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                                SelectionDAG &DAG) const {
2709dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  assert(Subtarget->isTargetELF() && "This function expects an ELF target");
2710dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  assert(getTargetMachine().getCodeModel() == CodeModel::Small &&
2711dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines         "ELF TLS only supported in small memory model");
271272062f5744557e270a38192554c3126ea5f97434Tim Northover  const GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(Op);
271372062f5744557e270a38192554c3126ea5f97434Tim Northover
271472062f5744557e270a38192554c3126ea5f97434Tim Northover  TLSModel::Model Model = getTargetMachine().getTLSModel(GA->getGlobal());
271572062f5744557e270a38192554c3126ea5f97434Tim Northover
271672062f5744557e270a38192554c3126ea5f97434Tim Northover  SDValue TPOff;
271772062f5744557e270a38192554c3126ea5f97434Tim Northover  EVT PtrVT = getPointerTy();
2718ac6d9bec671252dd1e596fa71180ff6b39d06b5dAndrew Trick  SDLoc DL(Op);
271972062f5744557e270a38192554c3126ea5f97434Tim Northover  const GlobalValue *GV = GA->getGlobal();
272072062f5744557e270a38192554c3126ea5f97434Tim Northover
272172062f5744557e270a38192554c3126ea5f97434Tim Northover  SDValue ThreadBase = DAG.getNode(AArch64ISD::THREAD_POINTER, DL, PtrVT);
272272062f5744557e270a38192554c3126ea5f97434Tim Northover
2723dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Model == TLSModel::LocalExec) {
2724dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue HiVar = DAG.getTargetGlobalAddress(
2725dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        GV, DL, PtrVT, 0, AArch64II::MO_TLS | AArch64II::MO_G1);
2726dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue LoVar = DAG.getTargetGlobalAddress(
2727dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        GV, DL, PtrVT, 0,
2728dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        AArch64II::MO_TLS | AArch64II::MO_G0 | AArch64II::MO_NC);
2729dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2730dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    TPOff = SDValue(DAG.getMachineNode(AArch64::MOVZXi, DL, PtrVT, HiVar,
2731dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                       DAG.getTargetConstant(16, MVT::i32)),
2732dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                    0);
2733dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    TPOff = SDValue(DAG.getMachineNode(AArch64::MOVKXi, DL, PtrVT, TPOff, LoVar,
2734dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                       DAG.getTargetConstant(0, MVT::i32)),
2735dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                    0);
2736dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  } else if (Model == TLSModel::InitialExec) {
2737dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    TPOff = DAG.getTargetGlobalAddress(GV, DL, PtrVT, 0, AArch64II::MO_TLS);
2738dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    TPOff = DAG.getNode(AArch64ISD::LOADgot, DL, PtrVT, TPOff);
273972062f5744557e270a38192554c3126ea5f97434Tim Northover  } else if (Model == TLSModel::LocalDynamic) {
274072062f5744557e270a38192554c3126ea5f97434Tim Northover    // Local-dynamic accesses proceed in two phases. A general-dynamic TLS
274172062f5744557e270a38192554c3126ea5f97434Tim Northover    // descriptor call against the special symbol _TLS_MODULE_BASE_ to calculate
274272062f5744557e270a38192554c3126ea5f97434Tim Northover    // the beginning of the module's TLS region, followed by a DTPREL offset
274372062f5744557e270a38192554c3126ea5f97434Tim Northover    // calculation.
274472062f5744557e270a38192554c3126ea5f97434Tim Northover
274572062f5744557e270a38192554c3126ea5f97434Tim Northover    // These accesses will need deduplicating if there's more than one.
2746dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    AArch64FunctionInfo *MFI =
2747dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        DAG.getMachineFunction().getInfo<AArch64FunctionInfo>();
274872062f5744557e270a38192554c3126ea5f97434Tim Northover    MFI->incNumLocalDynamicTLSAccesses();
274972062f5744557e270a38192554c3126ea5f97434Tim Northover
2750dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Accesses used in this sequence go via the TLS descriptor which lives in
2751dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // the GOT. Prepare an address we can use to handle this.
2752dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue HiDesc = DAG.getTargetExternalSymbol(
2753dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        "_TLS_MODULE_BASE_", PtrVT, AArch64II::MO_TLS | AArch64II::MO_PAGE);
2754dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue LoDesc = DAG.getTargetExternalSymbol(
2755dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        "_TLS_MODULE_BASE_", PtrVT,
2756dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        AArch64II::MO_TLS | AArch64II::MO_PAGEOFF | AArch64II::MO_NC);
2757dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2758dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // First argument to the descriptor call is the address of the descriptor
2759dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // itself.
2760dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue DescAddr = DAG.getNode(AArch64ISD::ADRP, DL, PtrVT, HiDesc);
2761dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    DescAddr = DAG.getNode(AArch64ISD::ADDlow, DL, PtrVT, DescAddr, LoDesc);
2762dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2763dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // The call needs a relocation too for linker relaxation. It doesn't make
2764dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // sense to call it MO_PAGE or MO_PAGEOFF though so we need another copy of
2765dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // the address.
2766dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue SymAddr = DAG.getTargetExternalSymbol("_TLS_MODULE_BASE_", PtrVT,
2767dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                                  AArch64II::MO_TLS);
2768dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2769dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Now we can calculate the offset from TPIDR_EL0 to this module's
2770dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // thread-local area.
2771dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    TPOff = LowerELFTLSDescCall(SymAddr, DescAddr, DL, DAG);
2772dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2773dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Now use :dtprel_whatever: operations to calculate this variable's offset
2774dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // in its thread-storage area.
2775dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue HiVar = DAG.getTargetGlobalAddress(
2776dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        GV, DL, MVT::i64, 0, AArch64II::MO_TLS | AArch64II::MO_G1);
2777dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue LoVar = DAG.getTargetGlobalAddress(
2778dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        GV, DL, MVT::i64, 0,
2779dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        AArch64II::MO_TLS | AArch64II::MO_G0 | AArch64II::MO_NC);
2780dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2781dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue DTPOff =
2782dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue(DAG.getMachineNode(AArch64::MOVZXi, DL, PtrVT, HiVar,
2783dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                   DAG.getTargetConstant(16, MVT::i32)),
2784dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                0);
2785dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    DTPOff =
2786dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue(DAG.getMachineNode(AArch64::MOVKXi, DL, PtrVT, DTPOff, LoVar,
2787dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                   DAG.getTargetConstant(0, MVT::i32)),
2788dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                0);
2789dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2790dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    TPOff = DAG.getNode(ISD::ADD, DL, PtrVT, TPOff, DTPOff);
2791dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  } else if (Model == TLSModel::GeneralDynamic) {
2792dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Accesses used in this sequence go via the TLS descriptor which lives in
2793dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // the GOT. Prepare an address we can use to handle this.
2794dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue HiDesc = DAG.getTargetGlobalAddress(
2795dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        GV, DL, PtrVT, 0, AArch64II::MO_TLS | AArch64II::MO_PAGE);
2796dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue LoDesc = DAG.getTargetGlobalAddress(
2797dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        GV, DL, PtrVT, 0,
2798dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        AArch64II::MO_TLS | AArch64II::MO_PAGEOFF | AArch64II::MO_NC);
2799dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2800dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // First argument to the descriptor call is the address of the descriptor
2801dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // itself.
2802dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue DescAddr = DAG.getNode(AArch64ISD::ADRP, DL, PtrVT, HiDesc);
2803dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    DescAddr = DAG.getNode(AArch64ISD::ADDlow, DL, PtrVT, DescAddr, LoDesc);
2804dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2805dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // The call needs a relocation too for linker relaxation. It doesn't make
2806dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // sense to call it MO_PAGE or MO_PAGEOFF though so we need another copy of
2807dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // the address.
2808dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue SymAddr =
2809dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        DAG.getTargetGlobalAddress(GV, DL, PtrVT, 0, AArch64II::MO_TLS);
2810dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2811dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Finally we can make a call to calculate the offset from tpidr_el0.
2812dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    TPOff = LowerELFTLSDescCall(SymAddr, DescAddr, DL, DAG);
281372062f5744557e270a38192554c3126ea5f97434Tim Northover  } else
2814dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    llvm_unreachable("Unsupported ELF TLS access model");
281572062f5744557e270a38192554c3126ea5f97434Tim Northover
281672062f5744557e270a38192554c3126ea5f97434Tim Northover  return DAG.getNode(ISD::ADD, DL, PtrVT, ThreadBase, TPOff);
281772062f5744557e270a38192554c3126ea5f97434Tim Northover}
281872062f5744557e270a38192554c3126ea5f97434Tim Northover
2819dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::LowerGlobalTLSAddress(SDValue Op,
2820dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                                     SelectionDAG &DAG) const {
2821dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Subtarget->isTargetDarwin())
2822dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerDarwinGlobalTLSAddress(Op, DAG);
2823dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  else if (Subtarget->isTargetELF())
2824dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerELFGlobalTLSAddress(Op, DAG);
2825dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2826dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  llvm_unreachable("Unexpected platform trying to use TLS");
2827dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
2828dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::LowerBR_CC(SDValue Op, SelectionDAG &DAG) const {
2829dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Chain = Op.getOperand(0);
2830dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(1))->get();
2831dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue LHS = Op.getOperand(2);
2832dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue RHS = Op.getOperand(3);
2833dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Dest = Op.getOperand(4);
283436b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines  SDLoc dl(Op);
283536b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
2836dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Handle f128 first, since lowering it will result in comparing the return
2837dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // value of a libcall against zero, which is just what the rest of LowerBR_CC
2838dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // is expecting to deal with.
2839dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (LHS.getValueType() == MVT::f128) {
2840dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    softenSetCCOperands(DAG, MVT::f128, LHS, RHS, CC, dl);
284136b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
2842dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // If softenSetCCOperands returned a scalar, we need to compare the result
2843dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // against zero to select between true and false values.
2844dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (!RHS.getNode()) {
2845dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      RHS = DAG.getConstant(0, LHS.getValueType());
2846dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      CC = ISD::SETNE;
2847dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
284836b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines  }
284936b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
2850dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Optimize {s|u}{add|sub|mul}.with.overflow feeding into a branch
2851dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // instruction.
2852dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned Opc = LHS.getOpcode();
2853dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (LHS.getResNo() == 1 && isa<ConstantSDNode>(RHS) &&
2854dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      cast<ConstantSDNode>(RHS)->isOne() &&
2855dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      (Opc == ISD::SADDO || Opc == ISD::UADDO || Opc == ISD::SSUBO ||
2856dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines       Opc == ISD::USUBO || Opc == ISD::SMULO || Opc == ISD::UMULO)) {
2857dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    assert((CC == ISD::SETEQ || CC == ISD::SETNE) &&
2858dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines           "Unexpected condition code.");
2859dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Only lower legal XALUO ops.
2860dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (!DAG.getTargetLoweringInfo().isTypeLegal(LHS->getValueType(0)))
2861dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return SDValue();
286236b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
2863dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // The actual operation with overflow check.
2864dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    AArch64CC::CondCode OFCC;
2865dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue Value, Overflow;
2866dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    std::tie(Value, Overflow) = getAArch64XALUOOp(OFCC, LHS.getValue(0), DAG);
286772062f5744557e270a38192554c3126ea5f97434Tim Northover
2868dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (CC == ISD::SETNE)
2869dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      OFCC = getInvertedCondCode(OFCC);
2870dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue CCVal = DAG.getConstant(OFCC, MVT::i32);
287172062f5744557e270a38192554c3126ea5f97434Tim Northover
2872dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::BRCOND, SDLoc(LHS), MVT::Other, Chain, Dest,
2873dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                       CCVal, Overflow);
2874dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
287572062f5744557e270a38192554c3126ea5f97434Tim Northover
2876dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (LHS.getValueType().isInteger()) {
2877dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    assert((LHS.getValueType() == RHS.getValueType()) &&
2878dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines           (LHS.getValueType() == MVT::i32 || LHS.getValueType() == MVT::i64));
2879dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2880dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // If the RHS of the comparison is zero, we can potentially fold this
2881dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // to a specialized branch.
2882dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    const ConstantSDNode *RHSC = dyn_cast<ConstantSDNode>(RHS);
2883dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (RHSC && RHSC->getZExtValue() == 0) {
2884dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (CC == ISD::SETEQ) {
2885dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // See if we can use a TBZ to fold in an AND as well.
2886dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // TBZ has a smaller branch displacement than CBZ.  If the offset is
2887dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // out of bounds, a late MI-layer pass rewrites branches.
2888dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // 403.gcc is an example that hits this case.
2889dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        if (LHS.getOpcode() == ISD::AND &&
2890dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines            isa<ConstantSDNode>(LHS.getOperand(1)) &&
2891dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines            isPowerOf2_64(LHS.getConstantOperandVal(1))) {
2892dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          SDValue Test = LHS.getOperand(0);
2893dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          uint64_t Mask = LHS.getConstantOperandVal(1);
2894dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2895dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          // TBZ only operates on i64's, but the ext should be free.
2896dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          if (Test.getValueType() == MVT::i32)
2897dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines            Test = DAG.getAnyExtOrTrunc(Test, dl, MVT::i64);
2898dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2899dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          return DAG.getNode(AArch64ISD::TBZ, dl, MVT::Other, Chain, Test,
2900dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                             DAG.getConstant(Log2_64(Mask), MVT::i64), Dest);
2901dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        }
290272062f5744557e270a38192554c3126ea5f97434Tim Northover
2903dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(AArch64ISD::CBZ, dl, MVT::Other, Chain, LHS, Dest);
2904dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      } else if (CC == ISD::SETNE) {
2905dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // See if we can use a TBZ to fold in an AND as well.
2906dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // TBZ has a smaller branch displacement than CBZ.  If the offset is
2907dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // out of bounds, a late MI-layer pass rewrites branches.
2908dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // 403.gcc is an example that hits this case.
2909dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        if (LHS.getOpcode() == ISD::AND &&
2910dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines            isa<ConstantSDNode>(LHS.getOperand(1)) &&
2911dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines            isPowerOf2_64(LHS.getConstantOperandVal(1))) {
2912dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          SDValue Test = LHS.getOperand(0);
2913dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          uint64_t Mask = LHS.getConstantOperandVal(1);
2914dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2915dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          // TBNZ only operates on i64's, but the ext should be free.
2916dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          if (Test.getValueType() == MVT::i32)
2917dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines            Test = DAG.getAnyExtOrTrunc(Test, dl, MVT::i64);
2918dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2919dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          return DAG.getNode(AArch64ISD::TBNZ, dl, MVT::Other, Chain, Test,
2920dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                             DAG.getConstant(Log2_64(Mask), MVT::i64), Dest);
2921dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        }
292272062f5744557e270a38192554c3126ea5f97434Tim Northover
2923dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(AArch64ISD::CBNZ, dl, MVT::Other, Chain, LHS, Dest);
2924dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
2925dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
292672062f5744557e270a38192554c3126ea5f97434Tim Northover
2927dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue CCVal;
2928dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue Cmp = getAArch64Cmp(LHS, RHS, CC, CCVal, DAG, dl);
2929dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::BRCOND, dl, MVT::Other, Chain, Dest, CCVal,
2930dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                       Cmp);
2931dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
293272062f5744557e270a38192554c3126ea5f97434Tim Northover
2933dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  assert(LHS.getValueType() == MVT::f32 || LHS.getValueType() == MVT::f64);
2934dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2935dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Unfortunately, the mapping of LLVM FP CC's onto AArch64 CC's isn't totally
2936dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // clean.  Some of them require two branches to implement.
2937dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Cmp = emitComparison(LHS, RHS, CC, dl, DAG);
2938dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  AArch64CC::CondCode CC1, CC2;
2939dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  changeFPCCToAArch64CC(CC, CC1, CC2);
2940dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue CC1Val = DAG.getConstant(CC1, MVT::i32);
2941dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue BR1 =
2942dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      DAG.getNode(AArch64ISD::BRCOND, dl, MVT::Other, Chain, Dest, CC1Val, Cmp);
2943dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (CC2 != AArch64CC::AL) {
2944dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue CC2Val = DAG.getConstant(CC2, MVT::i32);
2945dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::BRCOND, dl, MVT::Other, BR1, Dest, CC2Val,
2946dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                       Cmp);
2947dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
294872062f5744557e270a38192554c3126ea5f97434Tim Northover
2949dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return BR1;
295072062f5744557e270a38192554c3126ea5f97434Tim Northover}
295172062f5744557e270a38192554c3126ea5f97434Tim Northover
2952dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::LowerFCOPYSIGN(SDValue Op,
2953dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                              SelectionDAG &DAG) const {
295487773c318fcee853fb34a80a10c4347d523bdafbTim Northover  EVT VT = Op.getValueType();
2955dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc DL(Op);
295687773c318fcee853fb34a80a10c4347d523bdafbTim Northover
2957dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue In1 = Op.getOperand(0);
2958dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue In2 = Op.getOperand(1);
2959dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT SrcVT = In2.getValueType();
2960dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (SrcVT != VT) {
2961dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (SrcVT == MVT::f32 && VT == MVT::f64)
2962dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      In2 = DAG.getNode(ISD::FP_EXTEND, DL, VT, In2);
2963dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    else if (SrcVT == MVT::f64 && VT == MVT::f32)
2964dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      In2 = DAG.getNode(ISD::FP_ROUND, DL, VT, In2, DAG.getIntPtrConstant(0));
2965dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    else
2966dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // FIXME: Src type is different, bail out for now. Can VT really be a
2967dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // vector type?
2968dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return SDValue();
2969dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
297087773c318fcee853fb34a80a10c4347d523bdafbTim Northover
2971dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VecVT;
2972dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT EltVT;
2973dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue EltMask, VecVal1, VecVal2;
2974dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (VT == MVT::f32 || VT == MVT::v2f32 || VT == MVT::v4f32) {
2975dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    EltVT = MVT::i32;
2976dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    VecVT = MVT::v4i32;
2977dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    EltMask = DAG.getConstant(0x80000000ULL, EltVT);
2978dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2979dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (!VT.isVector()) {
2980dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      VecVal1 = DAG.getTargetInsertSubreg(AArch64::ssub, DL, VecVT,
2981dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                          DAG.getUNDEF(VecVT), In1);
2982dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      VecVal2 = DAG.getTargetInsertSubreg(AArch64::ssub, DL, VecVT,
2983dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                          DAG.getUNDEF(VecVT), In2);
2984dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    } else {
2985dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      VecVal1 = DAG.getNode(ISD::BITCAST, DL, VecVT, In1);
2986dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      VecVal2 = DAG.getNode(ISD::BITCAST, DL, VecVT, In2);
298787773c318fcee853fb34a80a10c4347d523bdafbTim Northover    }
2988dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  } else if (VT == MVT::f64 || VT == MVT::v2f64) {
2989dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    EltVT = MVT::i64;
2990dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    VecVT = MVT::v2i64;
2991dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2992dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // We want to materialize a mask with the the high bit set, but the AdvSIMD
2993dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // immediate moves cannot materialize that in a single instruction for
2994dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // 64-bit elements. Instead, materialize zero and then negate it.
2995dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    EltMask = DAG.getConstant(0, EltVT);
2996dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
2997dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (!VT.isVector()) {
2998dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      VecVal1 = DAG.getTargetInsertSubreg(AArch64::dsub, DL, VecVT,
2999dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                          DAG.getUNDEF(VecVT), In1);
3000dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      VecVal2 = DAG.getTargetInsertSubreg(AArch64::dsub, DL, VecVT,
3001dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                          DAG.getUNDEF(VecVT), In2);
300287773c318fcee853fb34a80a10c4347d523bdafbTim Northover    } else {
3003dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      VecVal1 = DAG.getNode(ISD::BITCAST, DL, VecVT, In1);
3004dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      VecVal2 = DAG.getNode(ISD::BITCAST, DL, VecVT, In2);
300587773c318fcee853fb34a80a10c4347d523bdafbTim Northover    }
3006dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  } else {
3007dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    llvm_unreachable("Invalid type for copysign!");
3008dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
300987773c318fcee853fb34a80a10c4347d523bdafbTim Northover
3010dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  std::vector<SDValue> BuildVectorOps;
3011dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  for (unsigned i = 0; i < VecVT.getVectorNumElements(); ++i)
3012dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    BuildVectorOps.push_back(EltMask);
301387773c318fcee853fb34a80a10c4347d523bdafbTim Northover
3014dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue BuildVec = DAG.getNode(ISD::BUILD_VECTOR, DL, VecVT, BuildVectorOps);
301587773c318fcee853fb34a80a10c4347d523bdafbTim Northover
3016dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // If we couldn't materialize the mask above, then the mask vector will be
3017dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // the zero vector, and we need to negate it here.
3018dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (VT == MVT::f64 || VT == MVT::v2f64) {
3019dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    BuildVec = DAG.getNode(ISD::BITCAST, DL, MVT::v2f64, BuildVec);
3020dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    BuildVec = DAG.getNode(ISD::FNEG, DL, MVT::v2f64, BuildVec);
3021dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    BuildVec = DAG.getNode(ISD::BITCAST, DL, MVT::v2i64, BuildVec);
302287773c318fcee853fb34a80a10c4347d523bdafbTim Northover  }
302387773c318fcee853fb34a80a10c4347d523bdafbTim Northover
3024dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Sel =
3025dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      DAG.getNode(AArch64ISD::BIT, DL, VecVT, VecVal1, VecVal2, BuildVec);
302687773c318fcee853fb34a80a10c4347d523bdafbTim Northover
3027dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (VT == MVT::f32)
3028dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getTargetExtractSubreg(AArch64::ssub, DL, VT, Sel);
3029dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  else if (VT == MVT::f64)
3030dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getTargetExtractSubreg(AArch64::dsub, DL, VT, Sel);
3031dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  else
3032dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(ISD::BITCAST, DL, VT, Sel);
3033dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
303487773c318fcee853fb34a80a10c4347d523bdafbTim Northover
3035dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::LowerCTPOP(SDValue Op, SelectionDAG &DAG) const {
3036dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (DAG.getMachineFunction().getFunction()->getAttributes().hasAttribute(
3037dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          AttributeSet::FunctionIndex, Attribute::NoImplicitFloat))
3038dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
303987773c318fcee853fb34a80a10c4347d523bdafbTim Northover
3040dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // While there is no integer popcount instruction, it can
3041dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // be more efficiently lowered to the following sequence that uses
3042dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // AdvSIMD registers/instructions as long as the copies to/from
3043dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // the AdvSIMD registers are cheap.
3044dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //  FMOV    D0, X0        // copy 64-bit int to vector, high bits zero'd
3045dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //  CNT     V0.8B, V0.8B  // 8xbyte pop-counts
3046dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //  ADDV    B0, V0.8B     // sum 8xbyte pop-counts
3047dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //  UMOV    X0, V0.B[0]   // copy byte result back to integer reg
3048dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Val = Op.getOperand(0);
3049dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc DL(Op);
3050dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT = Op.getValueType();
3051dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue ZeroVec = DAG.getUNDEF(MVT::v8i8);
305287773c318fcee853fb34a80a10c4347d523bdafbTim Northover
3053dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue VecVal;
3054dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (VT == MVT::i32) {
3055dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    VecVal = DAG.getNode(ISD::BITCAST, DL, MVT::f32, Val);
3056dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    VecVal = DAG.getTargetInsertSubreg(AArch64::ssub, DL, MVT::v8i8, ZeroVec,
3057dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                       VecVal);
3058dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  } else {
3059dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    VecVal = DAG.getNode(ISD::BITCAST, DL, MVT::v8i8, Val);
306087773c318fcee853fb34a80a10c4347d523bdafbTim Northover  }
306187773c318fcee853fb34a80a10c4347d523bdafbTim Northover
3062dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue CtPop = DAG.getNode(ISD::CTPOP, DL, MVT::v8i8, VecVal);
3063dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue UaddLV = DAG.getNode(
3064dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      ISD::INTRINSIC_WO_CHAIN, DL, MVT::i32,
3065dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      DAG.getConstant(Intrinsic::aarch64_neon_uaddlv, MVT::i32), CtPop);
306687773c318fcee853fb34a80a10c4347d523bdafbTim Northover
3067dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (VT == MVT::i64)
3068dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    UaddLV = DAG.getNode(ISD::ZERO_EXTEND, DL, MVT::i64, UaddLV);
3069dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return UaddLV;
3070dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
307187773c318fcee853fb34a80a10c4347d523bdafbTim Northover
3072dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::LowerSETCC(SDValue Op, SelectionDAG &DAG) const {
307387773c318fcee853fb34a80a10c4347d523bdafbTim Northover
3074dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Op.getValueType().isVector())
3075dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LowerVSETCC(Op, DAG);
307687773c318fcee853fb34a80a10c4347d523bdafbTim Northover
307772062f5744557e270a38192554c3126ea5f97434Tim Northover  SDValue LHS = Op.getOperand(0);
307872062f5744557e270a38192554c3126ea5f97434Tim Northover  SDValue RHS = Op.getOperand(1);
307972062f5744557e270a38192554c3126ea5f97434Tim Northover  ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(2))->get();
3080dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc dl(Op);
308172062f5744557e270a38192554c3126ea5f97434Tim Northover
3082dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // We chose ZeroOrOneBooleanContents, so use zero and one.
3083dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT = Op.getValueType();
3084dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue TVal = DAG.getConstant(1, VT);
3085dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue FVal = DAG.getConstant(0, VT);
308687773c318fcee853fb34a80a10c4347d523bdafbTim Northover
3087dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Handle f128 first, since one possible outcome is a normal integer
3088dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // comparison which gets picked up by the next if statement.
308972062f5744557e270a38192554c3126ea5f97434Tim Northover  if (LHS.getValueType() == MVT::f128) {
309072062f5744557e270a38192554c3126ea5f97434Tim Northover    softenSetCCOperands(DAG, MVT::f128, LHS, RHS, CC, dl);
309172062f5744557e270a38192554c3126ea5f97434Tim Northover
309272062f5744557e270a38192554c3126ea5f97434Tim Northover    // If softenSetCCOperands returned a scalar, use it.
3093dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (!RHS.getNode()) {
309472062f5744557e270a38192554c3126ea5f97434Tim Northover      assert(LHS.getValueType() == Op.getValueType() &&
309572062f5744557e270a38192554c3126ea5f97434Tim Northover             "Unexpected setcc expansion!");
309672062f5744557e270a38192554c3126ea5f97434Tim Northover      return LHS;
309772062f5744557e270a38192554c3126ea5f97434Tim Northover    }
309872062f5744557e270a38192554c3126ea5f97434Tim Northover  }
309972062f5744557e270a38192554c3126ea5f97434Tim Northover
310072062f5744557e270a38192554c3126ea5f97434Tim Northover  if (LHS.getValueType().isInteger()) {
3101dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue CCVal;
3102dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue Cmp =
3103dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        getAArch64Cmp(LHS, RHS, ISD::getSetCCInverse(CC, true), CCVal, DAG, dl);
3104dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
3105dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Note that we inverted the condition above, so we reverse the order of
3106dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // the true and false operands here.  This will allow the setcc to be
3107dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // matched to a single CSINC instruction.
3108dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::CSEL, dl, VT, FVal, TVal, CCVal, Cmp);
3109dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
3110dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
3111dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Now we know we're dealing with FP values.
3112dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  assert(LHS.getValueType() == MVT::f32 || LHS.getValueType() == MVT::f64);
311372062f5744557e270a38192554c3126ea5f97434Tim Northover
3114dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // If that fails, we'll need to perform an FCMP + CSEL sequence.  Go ahead
3115dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // and do the comparison.
3116dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Cmp = emitComparison(LHS, RHS, CC, dl, DAG);
311772062f5744557e270a38192554c3126ea5f97434Tim Northover
3118dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  AArch64CC::CondCode CC1, CC2;
3119dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  changeFPCCToAArch64CC(CC, CC1, CC2);
3120dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (CC2 == AArch64CC::AL) {
3121dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    changeFPCCToAArch64CC(ISD::getSetCCInverse(CC, false), CC1, CC2);
3122dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue CC1Val = DAG.getConstant(CC1, MVT::i32);
3123dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
3124dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Note that we inverted the condition above, so we reverse the order of
3125dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // the true and false operands here.  This will allow the setcc to be
3126dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // matched to a single CSINC instruction.
3127dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::CSEL, dl, VT, FVal, TVal, CC1Val, Cmp);
3128dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  } else {
3129dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Unfortunately, the mapping of LLVM FP CC's onto AArch64 CC's isn't
3130dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // totally clean.  Some of them require two CSELs to implement.  As is in
3131dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // this case, we emit the first CSEL and then emit a second using the output
3132dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // of the first as the RHS.  We're effectively OR'ing the two CC's together.
3133dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
3134dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // FIXME: It would be nice if we could match the two CSELs to two CSINCs.
3135dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue CC1Val = DAG.getConstant(CC1, MVT::i32);
3136dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue CS1 =
3137dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        DAG.getNode(AArch64ISD::CSEL, dl, VT, TVal, FVal, CC1Val, Cmp);
3138dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
3139dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue CC2Val = DAG.getConstant(CC2, MVT::i32);
3140dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::CSEL, dl, VT, TVal, CS1, CC2Val, Cmp);
314172062f5744557e270a38192554c3126ea5f97434Tim Northover  }
3142dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
314372062f5744557e270a38192554c3126ea5f97434Tim Northover
3144dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// A SELECT_CC operation is really some kind of max or min if both values being
3145dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// compared are, in some sense, equal to the results in either case. However,
3146dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// it is permissible to compare f32 values and produce directly extended f64
3147dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// values.
3148dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines///
3149dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// Extending the comparison operands would also be allowed, but is less likely
3150dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// to happen in practice since their use is right here. Note that truncate
3151dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// operations would *not* be semantically equivalent.
3152dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic bool selectCCOpsAreFMaxCompatible(SDValue Cmp, SDValue Result) {
3153dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Cmp == Result)
3154dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return true;
315572062f5744557e270a38192554c3126ea5f97434Tim Northover
3156dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  ConstantFPSDNode *CCmp = dyn_cast<ConstantFPSDNode>(Cmp);
3157dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  ConstantFPSDNode *CResult = dyn_cast<ConstantFPSDNode>(Result);
3158dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (CCmp && CResult && Cmp.getValueType() == MVT::f32 &&
3159dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Result.getValueType() == MVT::f64) {
3160dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    bool Lossy;
3161dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    APFloat CmpVal = CCmp->getValueAPF();
3162dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    CmpVal.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven, &Lossy);
3163dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return CResult->getValueAPF().bitwiseIsEqual(CmpVal);
316472062f5744557e270a38192554c3126ea5f97434Tim Northover  }
316572062f5744557e270a38192554c3126ea5f97434Tim Northover
3166dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return Result->getOpcode() == ISD::FP_EXTEND && Result->getOperand(0) == Cmp;
316772062f5744557e270a38192554c3126ea5f97434Tim Northover}
316872062f5744557e270a38192554c3126ea5f97434Tim Northover
3169dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::LowerSELECT(SDValue Op,
3170dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                           SelectionDAG &DAG) const {
3171dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue CC = Op->getOperand(0);
3172dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue TVal = Op->getOperand(1);
3173dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue FVal = Op->getOperand(2);
3174dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc DL(Op);
317536b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
3176dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned Opc = CC.getOpcode();
3177dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Optimize {s|u}{add|sub|mul}.with.overflow feeding into a select
3178dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // instruction.
3179dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (CC.getResNo() == 1 &&
3180dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      (Opc == ISD::SADDO || Opc == ISD::UADDO || Opc == ISD::SSUBO ||
3181dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines       Opc == ISD::USUBO || Opc == ISD::SMULO || Opc == ISD::UMULO)) {
3182dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Only lower legal XALUO ops.
3183dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (!DAG.getTargetLoweringInfo().isTypeLegal(CC->getValueType(0)))
3184dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return SDValue();
318536b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
3186dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    AArch64CC::CondCode OFCC;
3187dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue Value, Overflow;
3188dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    std::tie(Value, Overflow) = getAArch64XALUOOp(OFCC, CC.getValue(0), DAG);
3189dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue CCVal = DAG.getConstant(OFCC, MVT::i32);
3190dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
3191dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::CSEL, DL, Op.getValueType(), TVal, FVal,
3192dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                       CCVal, Overflow);
3193dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
3194dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
3195dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (CC.getOpcode() == ISD::SETCC)
3196dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getSelectCC(DL, CC.getOperand(0), CC.getOperand(1), TVal, FVal,
3197dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                           cast<CondCodeSDNode>(CC.getOperand(2))->get());
3198dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  else
3199dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getSelectCC(DL, CC, DAG.getConstant(0, CC.getValueType()), TVal,
3200dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                           FVal, ISD::SETNE);
3201dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
3202dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
3203dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::LowerSELECT_CC(SDValue Op,
3204dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                              SelectionDAG &DAG) const {
3205dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(4))->get();
320636b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines  SDValue LHS = Op.getOperand(0);
320736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines  SDValue RHS = Op.getOperand(1);
3208dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue TVal = Op.getOperand(2);
3209dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue FVal = Op.getOperand(3);
3210dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc dl(Op);
321136b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
3212dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Handle f128 first, because it will result in a comparison of some RTLIB
3213dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // call result against zero.
321436b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines  if (LHS.getValueType() == MVT::f128) {
321536b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines    softenSetCCOperands(DAG, MVT::f128, LHS, RHS, CC, dl);
321636b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
321736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines    // If softenSetCCOperands returned a scalar, we need to compare the result
321836b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines    // against zero to select between true and false values.
3219dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (!RHS.getNode()) {
322036b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines      RHS = DAG.getConstant(0, LHS.getValueType());
322136b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines      CC = ISD::SETNE;
322236b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines    }
322336b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines  }
322436b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
3225dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Handle integers first.
322636b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines  if (LHS.getValueType().isInteger()) {
3227dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    assert((LHS.getValueType() == RHS.getValueType()) &&
3228dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines           (LHS.getValueType() == MVT::i32 || LHS.getValueType() == MVT::i64));
3229dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
3230dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned Opcode = AArch64ISD::CSEL;
3231dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
3232dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // If both the TVal and the FVal are constants, see if we can swap them in
3233dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // order to for a CSINV or CSINC out of them.
3234dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    ConstantSDNode *CFVal = dyn_cast<ConstantSDNode>(FVal);
3235dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    ConstantSDNode *CTVal = dyn_cast<ConstantSDNode>(TVal);
3236dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
3237dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (CTVal && CFVal && CTVal->isAllOnesValue() && CFVal->isNullValue()) {
3238dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      std::swap(TVal, FVal);
3239dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      std::swap(CTVal, CFVal);
3240dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      CC = ISD::getSetCCInverse(CC, true);
3241dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    } else if (CTVal && CFVal && CTVal->isOne() && CFVal->isNullValue()) {
3242dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      std::swap(TVal, FVal);
3243dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      std::swap(CTVal, CFVal);
3244dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      CC = ISD::getSetCCInverse(CC, true);
3245dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    } else if (TVal.getOpcode() == ISD::XOR) {
3246dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // If TVal is a NOT we want to swap TVal and FVal so that we can match
3247dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // with a CSINV rather than a CSEL.
3248dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      ConstantSDNode *CVal = dyn_cast<ConstantSDNode>(TVal.getOperand(1));
3249dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
3250dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (CVal && CVal->isAllOnesValue()) {
3251dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        std::swap(TVal, FVal);
3252dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        std::swap(CTVal, CFVal);
3253dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        CC = ISD::getSetCCInverse(CC, true);
3254dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
3255dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    } else if (TVal.getOpcode() == ISD::SUB) {
3256dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // If TVal is a negation (SUB from 0) we want to swap TVal and FVal so
3257dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // that we can match with a CSNEG rather than a CSEL.
3258dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      ConstantSDNode *CVal = dyn_cast<ConstantSDNode>(TVal.getOperand(0));
3259dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
3260dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (CVal && CVal->isNullValue()) {
3261dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        std::swap(TVal, FVal);
3262dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        std::swap(CTVal, CFVal);
3263dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        CC = ISD::getSetCCInverse(CC, true);
3264dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
3265dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    } else if (CTVal && CFVal) {
3266dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      const int64_t TrueVal = CTVal->getSExtValue();
3267dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      const int64_t FalseVal = CFVal->getSExtValue();
3268dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      bool Swap = false;
3269dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
3270dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // If both TVal and FVal are constants, see if FVal is the
3271dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // inverse/negation/increment of TVal and generate a CSINV/CSNEG/CSINC
3272dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // instead of a CSEL in that case.
3273dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (TrueVal == ~FalseVal) {
3274dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        Opcode = AArch64ISD::CSINV;
3275dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      } else if (TrueVal == -FalseVal) {
3276dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        Opcode = AArch64ISD::CSNEG;
3277dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      } else if (TVal.getValueType() == MVT::i32) {
3278dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // If our operands are only 32-bit wide, make sure we use 32-bit
3279dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // arithmetic for the check whether we can use CSINC. This ensures that
3280dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // the addition in the check will wrap around properly in case there is
3281dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // an overflow (which would not be the case if we do the check with
3282dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // 64-bit arithmetic).
3283dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        const uint32_t TrueVal32 = CTVal->getZExtValue();
3284dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        const uint32_t FalseVal32 = CFVal->getZExtValue();
3285dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
3286dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        if ((TrueVal32 == FalseVal32 + 1) || (TrueVal32 + 1 == FalseVal32)) {
3287dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          Opcode = AArch64ISD::CSINC;
3288dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
3289dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          if (TrueVal32 > FalseVal32) {
3290dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines            Swap = true;
3291dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          }
3292dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        }
3293dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // 64-bit check whether we can use CSINC.
3294dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      } else if ((TrueVal == FalseVal + 1) || (TrueVal + 1 == FalseVal)) {
3295dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        Opcode = AArch64ISD::CSINC;
3296dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
3297dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        if (TrueVal > FalseVal) {
3298dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          Swap = true;
3299dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        }
3300dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
3301dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
3302dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // Swap TVal and FVal if necessary.
3303dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (Swap) {
3304dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        std::swap(TVal, FVal);
3305dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        std::swap(CTVal, CFVal);
3306dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        CC = ISD::getSetCCInverse(CC, true);
3307dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
3308dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
3309dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (Opcode != AArch64ISD::CSEL) {
3310dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // Drop FVal since we can get its value by simply inverting/negating
3311dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // TVal.
3312dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        FVal = TVal;
3313dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
3314dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
3315dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
3316dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue CCVal;
3317dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue Cmp = getAArch64Cmp(LHS, RHS, CC, CCVal, DAG, dl);
3318dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
3319dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    EVT VT = Op.getValueType();
3320dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(Opcode, dl, VT, TVal, FVal, CCVal, Cmp);
3321dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
3322dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
3323dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Now we know we're dealing with FP values.
3324dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  assert(LHS.getValueType() == MVT::f32 || LHS.getValueType() == MVT::f64);
3325dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  assert(LHS.getValueType() == RHS.getValueType());
3326dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT = Op.getValueType();
3327dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
3328dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Try to match this select into a max/min operation, which have dedicated
3329dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // opcode in the instruction set.
3330dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // FIXME: This is not correct in the presence of NaNs, so we only enable this
3331dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // in no-NaNs mode.
3332dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (getTargetMachine().Options.NoNaNsFPMath) {
3333dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue MinMaxLHS = TVal, MinMaxRHS = FVal;
3334dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (selectCCOpsAreFMaxCompatible(LHS, MinMaxRHS) &&
3335dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        selectCCOpsAreFMaxCompatible(RHS, MinMaxLHS)) {
3336dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      CC = ISD::getSetCCSwappedOperands(CC);
3337dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      std::swap(MinMaxLHS, MinMaxRHS);
3338dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
333936b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
3340dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (selectCCOpsAreFMaxCompatible(LHS, MinMaxLHS) &&
3341dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        selectCCOpsAreFMaxCompatible(RHS, MinMaxRHS)) {
3342dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      switch (CC) {
3343dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      default:
3344dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        break;
3345dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      case ISD::SETGT:
3346dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      case ISD::SETGE:
3347dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      case ISD::SETUGT:
3348dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      case ISD::SETUGE:
3349dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      case ISD::SETOGT:
3350dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      case ISD::SETOGE:
3351dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(AArch64ISD::FMAX, dl, VT, MinMaxLHS, MinMaxRHS);
3352dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        break;
3353dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      case ISD::SETLT:
3354dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      case ISD::SETLE:
3355dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      case ISD::SETULT:
3356dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      case ISD::SETULE:
3357dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      case ISD::SETOLT:
3358dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      case ISD::SETOLE:
3359dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(AArch64ISD::FMIN, dl, VT, MinMaxLHS, MinMaxRHS);
3360dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        break;
3361dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
3362dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
3363dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
336436b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
3365dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // If that fails, we'll need to perform an FCMP + CSEL sequence.  Go ahead
3366dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // and do the comparison.
3367dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Cmp = emitComparison(LHS, RHS, CC, dl, DAG);
3368dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
3369dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Unfortunately, the mapping of LLVM FP CC's onto AArch64 CC's isn't totally
3370dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // clean.  Some of them require two CSELs to implement.
3371dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  AArch64CC::CondCode CC1, CC2;
3372dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  changeFPCCToAArch64CC(CC, CC1, CC2);
3373dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue CC1Val = DAG.getConstant(CC1, MVT::i32);
3374dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue CS1 = DAG.getNode(AArch64ISD::CSEL, dl, VT, TVal, FVal, CC1Val, Cmp);
3375dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
3376dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // If we need a second CSEL, emit it, using the output of the first as the
3377dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // RHS.  We're effectively OR'ing the two CC's together.
3378dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (CC2 != AArch64CC::AL) {
3379dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue CC2Val = DAG.getConstant(CC2, MVT::i32);
3380dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::CSEL, dl, VT, TVal, CS1, CC2Val, Cmp);
338136b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines  }
338236b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
3383dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Otherwise, return the output of the first CSEL.
3384dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return CS1;
3385dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
338636b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
3387dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::LowerJumpTable(SDValue Op,
3388dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                              SelectionDAG &DAG) const {
3389dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Jump table entries as PC relative offsets. No additional tweaking
3390dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // is necessary here. Just get the address of the jump table.
3391dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  JumpTableSDNode *JT = cast<JumpTableSDNode>(Op);
3392dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT PtrVT = getPointerTy();
3393dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc DL(Op);
339436b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
3395dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (getTargetMachine().getCodeModel() == CodeModel::Large &&
3396dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      !Subtarget->isTargetMachO()) {
3397dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    const unsigned char MO_NC = AArch64II::MO_NC;
3398dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(
3399dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        AArch64ISD::WrapperLarge, DL, PtrVT,
3400dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        DAG.getTargetJumpTable(JT->getIndex(), PtrVT, AArch64II::MO_G3),
3401dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        DAG.getTargetJumpTable(JT->getIndex(), PtrVT, AArch64II::MO_G2 | MO_NC),
3402dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        DAG.getTargetJumpTable(JT->getIndex(), PtrVT, AArch64II::MO_G1 | MO_NC),
3403dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        DAG.getTargetJumpTable(JT->getIndex(), PtrVT,
3404dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                               AArch64II::MO_G0 | MO_NC));
340536b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines  }
340636b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
3407dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Hi =
3408dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      DAG.getTargetJumpTable(JT->getIndex(), PtrVT, AArch64II::MO_PAGE);
3409dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Lo = DAG.getTargetJumpTable(JT->getIndex(), PtrVT,
3410dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                      AArch64II::MO_PAGEOFF | AArch64II::MO_NC);
3411dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue ADRP = DAG.getNode(AArch64ISD::ADRP, DL, PtrVT, Hi);
3412dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return DAG.getNode(AArch64ISD::ADDlow, DL, PtrVT, ADRP, Lo);
341336b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines}
341436b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
3415dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::LowerConstantPool(SDValue Op,
3416dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                                 SelectionDAG &DAG) const {
3417dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
3418dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT PtrVT = getPointerTy();
3419dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc DL(Op);
3420dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
3421dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (getTargetMachine().getCodeModel() == CodeModel::Large) {
3422dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Use the GOT for the large code model on iOS.
3423dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (Subtarget->isTargetMachO()) {
3424dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      SDValue GotAddr = DAG.getTargetConstantPool(
3425dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          CP->getConstVal(), PtrVT, CP->getAlignment(), CP->getOffset(),
3426dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          AArch64II::MO_GOT);
3427dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return DAG.getNode(AArch64ISD::LOADgot, DL, PtrVT, GotAddr);
3428dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
342972062f5744557e270a38192554c3126ea5f97434Tim Northover
3430dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    const unsigned char MO_NC = AArch64II::MO_NC;
3431dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(
3432dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        AArch64ISD::WrapperLarge, DL, PtrVT,
3433dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        DAG.getTargetConstantPool(CP->getConstVal(), PtrVT, CP->getAlignment(),
3434dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  CP->getOffset(), AArch64II::MO_G3),
3435dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        DAG.getTargetConstantPool(CP->getConstVal(), PtrVT, CP->getAlignment(),
3436dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  CP->getOffset(), AArch64II::MO_G2 | MO_NC),
3437dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        DAG.getTargetConstantPool(CP->getConstVal(), PtrVT, CP->getAlignment(),
3438dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  CP->getOffset(), AArch64II::MO_G1 | MO_NC),
3439dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        DAG.getTargetConstantPool(CP->getConstVal(), PtrVT, CP->getAlignment(),
3440dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  CP->getOffset(), AArch64II::MO_G0 | MO_NC));
3441dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  } else {
3442dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Use ADRP/ADD or ADRP/LDR for everything else: the small memory model on
3443dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // ELF, the only valid one on Darwin.
3444dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue Hi =
3445dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        DAG.getTargetConstantPool(CP->getConstVal(), PtrVT, CP->getAlignment(),
3446dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  CP->getOffset(), AArch64II::MO_PAGE);
3447dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue Lo = DAG.getTargetConstantPool(
3448dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        CP->getConstVal(), PtrVT, CP->getAlignment(), CP->getOffset(),
3449dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        AArch64II::MO_PAGEOFF | AArch64II::MO_NC);
3450dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
3451dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue ADRP = DAG.getNode(AArch64ISD::ADRP, DL, PtrVT, Hi);
3452dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::ADDlow, DL, PtrVT, ADRP, Lo);
3453dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
345472062f5744557e270a38192554c3126ea5f97434Tim Northover}
345572062f5744557e270a38192554c3126ea5f97434Tim Northover
3456dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::LowerBlockAddress(SDValue Op,
3457dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                               SelectionDAG &DAG) const {
3458dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  const BlockAddress *BA = cast<BlockAddressSDNode>(Op)->getBlockAddress();
3459dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT PtrVT = getPointerTy();
3460dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc DL(Op);
3461dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (getTargetMachine().getCodeModel() == CodeModel::Large &&
3462dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      !Subtarget->isTargetMachO()) {
3463dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    const unsigned char MO_NC = AArch64II::MO_NC;
3464dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(
3465dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        AArch64ISD::WrapperLarge, DL, PtrVT,
3466dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        DAG.getTargetBlockAddress(BA, PtrVT, 0, AArch64II::MO_G3),
3467dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        DAG.getTargetBlockAddress(BA, PtrVT, 0, AArch64II::MO_G2 | MO_NC),
3468dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        DAG.getTargetBlockAddress(BA, PtrVT, 0, AArch64II::MO_G1 | MO_NC),
3469dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        DAG.getTargetBlockAddress(BA, PtrVT, 0, AArch64II::MO_G0 | MO_NC));
3470dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  } else {
3471dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue Hi = DAG.getTargetBlockAddress(BA, PtrVT, 0, AArch64II::MO_PAGE);
3472dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue Lo = DAG.getTargetBlockAddress(BA, PtrVT, 0, AArch64II::MO_PAGEOFF |
3473dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                                             AArch64II::MO_NC);
3474dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue ADRP = DAG.getNode(AArch64ISD::ADRP, DL, PtrVT, Hi);
3475dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::ADDlow, DL, PtrVT, ADRP, Lo);
3476dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
3477dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
3478dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
3479dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::LowerDarwin_VASTART(SDValue Op,
3480dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                                 SelectionDAG &DAG) const {
3481dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  AArch64FunctionInfo *FuncInfo =
3482dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      DAG.getMachineFunction().getInfo<AArch64FunctionInfo>();
3483dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
3484dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc DL(Op);
3485dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue FR =
3486dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      DAG.getFrameIndex(FuncInfo->getVarArgsStackIndex(), getPointerTy());
3487dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
3488dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return DAG.getStore(Op.getOperand(0), DL, FR, Op.getOperand(1),
3489dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                      MachinePointerInfo(SV), false, false, 0);
3490dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
3491dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
3492dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::LowerAAPCS_VASTART(SDValue Op,
3493dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                                SelectionDAG &DAG) const {
349472062f5744557e270a38192554c3126ea5f97434Tim Northover  // The layout of the va_list struct is specified in the AArch64 Procedure Call
349572062f5744557e270a38192554c3126ea5f97434Tim Northover  // Standard, section B.3.
349672062f5744557e270a38192554c3126ea5f97434Tim Northover  MachineFunction &MF = DAG.getMachineFunction();
3497dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  AArch64FunctionInfo *FuncInfo = MF.getInfo<AArch64FunctionInfo>();
3498ac6d9bec671252dd1e596fa71180ff6b39d06b5dAndrew Trick  SDLoc DL(Op);
349972062f5744557e270a38192554c3126ea5f97434Tim Northover
350072062f5744557e270a38192554c3126ea5f97434Tim Northover  SDValue Chain = Op.getOperand(0);
350172062f5744557e270a38192554c3126ea5f97434Tim Northover  SDValue VAList = Op.getOperand(1);
350272062f5744557e270a38192554c3126ea5f97434Tim Northover  const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
350372062f5744557e270a38192554c3126ea5f97434Tim Northover  SmallVector<SDValue, 4> MemOps;
350472062f5744557e270a38192554c3126ea5f97434Tim Northover
350572062f5744557e270a38192554c3126ea5f97434Tim Northover  // void *__stack at offset 0
3506dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Stack =
3507dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      DAG.getFrameIndex(FuncInfo->getVarArgsStackIndex(), getPointerTy());
350872062f5744557e270a38192554c3126ea5f97434Tim Northover  MemOps.push_back(DAG.getStore(Chain, DL, Stack, VAList,
3509dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                MachinePointerInfo(SV), false, false, 8));
351072062f5744557e270a38192554c3126ea5f97434Tim Northover
351172062f5744557e270a38192554c3126ea5f97434Tim Northover  // void *__gr_top at offset 8
3512dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  int GPRSize = FuncInfo->getVarArgsGPRSize();
351372062f5744557e270a38192554c3126ea5f97434Tim Northover  if (GPRSize > 0) {
351472062f5744557e270a38192554c3126ea5f97434Tim Northover    SDValue GRTop, GRTopAddr;
351572062f5744557e270a38192554c3126ea5f97434Tim Northover
351672062f5744557e270a38192554c3126ea5f97434Tim Northover    GRTopAddr = DAG.getNode(ISD::ADD, DL, getPointerTy(), VAList,
351772062f5744557e270a38192554c3126ea5f97434Tim Northover                            DAG.getConstant(8, getPointerTy()));
351872062f5744557e270a38192554c3126ea5f97434Tim Northover
3519dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    GRTop = DAG.getFrameIndex(FuncInfo->getVarArgsGPRIndex(), getPointerTy());
352072062f5744557e270a38192554c3126ea5f97434Tim Northover    GRTop = DAG.getNode(ISD::ADD, DL, getPointerTy(), GRTop,
352172062f5744557e270a38192554c3126ea5f97434Tim Northover                        DAG.getConstant(GPRSize, getPointerTy()));
352272062f5744557e270a38192554c3126ea5f97434Tim Northover
352372062f5744557e270a38192554c3126ea5f97434Tim Northover    MemOps.push_back(DAG.getStore(Chain, DL, GRTop, GRTopAddr,
3524dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  MachinePointerInfo(SV, 8), false, false, 8));
352572062f5744557e270a38192554c3126ea5f97434Tim Northover  }
352672062f5744557e270a38192554c3126ea5f97434Tim Northover
352772062f5744557e270a38192554c3126ea5f97434Tim Northover  // void *__vr_top at offset 16
3528dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  int FPRSize = FuncInfo->getVarArgsFPRSize();
352972062f5744557e270a38192554c3126ea5f97434Tim Northover  if (FPRSize > 0) {
353072062f5744557e270a38192554c3126ea5f97434Tim Northover    SDValue VRTop, VRTopAddr;
353172062f5744557e270a38192554c3126ea5f97434Tim Northover    VRTopAddr = DAG.getNode(ISD::ADD, DL, getPointerTy(), VAList,
353272062f5744557e270a38192554c3126ea5f97434Tim Northover                            DAG.getConstant(16, getPointerTy()));
353372062f5744557e270a38192554c3126ea5f97434Tim Northover
3534dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    VRTop = DAG.getFrameIndex(FuncInfo->getVarArgsFPRIndex(), getPointerTy());
353572062f5744557e270a38192554c3126ea5f97434Tim Northover    VRTop = DAG.getNode(ISD::ADD, DL, getPointerTy(), VRTop,
353672062f5744557e270a38192554c3126ea5f97434Tim Northover                        DAG.getConstant(FPRSize, getPointerTy()));
353772062f5744557e270a38192554c3126ea5f97434Tim Northover
353872062f5744557e270a38192554c3126ea5f97434Tim Northover    MemOps.push_back(DAG.getStore(Chain, DL, VRTop, VRTopAddr,
3539dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  MachinePointerInfo(SV, 16), false, false, 8));
354072062f5744557e270a38192554c3126ea5f97434Tim Northover  }
354172062f5744557e270a38192554c3126ea5f97434Tim Northover
354272062f5744557e270a38192554c3126ea5f97434Tim Northover  // int __gr_offs at offset 24
354372062f5744557e270a38192554c3126ea5f97434Tim Northover  SDValue GROffsAddr = DAG.getNode(ISD::ADD, DL, getPointerTy(), VAList,
354472062f5744557e270a38192554c3126ea5f97434Tim Northover                                   DAG.getConstant(24, getPointerTy()));
354572062f5744557e270a38192554c3126ea5f97434Tim Northover  MemOps.push_back(DAG.getStore(Chain, DL, DAG.getConstant(-GPRSize, MVT::i32),
3546dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                GROffsAddr, MachinePointerInfo(SV, 24), false,
3547dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                false, 4));
354872062f5744557e270a38192554c3126ea5f97434Tim Northover
354972062f5744557e270a38192554c3126ea5f97434Tim Northover  // int __vr_offs at offset 28
355072062f5744557e270a38192554c3126ea5f97434Tim Northover  SDValue VROffsAddr = DAG.getNode(ISD::ADD, DL, getPointerTy(), VAList,
355172062f5744557e270a38192554c3126ea5f97434Tim Northover                                   DAG.getConstant(28, getPointerTy()));
355272062f5744557e270a38192554c3126ea5f97434Tim Northover  MemOps.push_back(DAG.getStore(Chain, DL, DAG.getConstant(-FPRSize, MVT::i32),
3553dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                VROffsAddr, MachinePointerInfo(SV, 28), false,
3554dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                false, 4));
355572062f5744557e270a38192554c3126ea5f97434Tim Northover
3556dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return DAG.getNode(ISD::TokenFactor, DL, MVT::Other, MemOps);
355772062f5744557e270a38192554c3126ea5f97434Tim Northover}
355872062f5744557e270a38192554c3126ea5f97434Tim Northover
3559dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::LowerVASTART(SDValue Op,
3560dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                            SelectionDAG &DAG) const {
3561dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return Subtarget->isTargetDarwin() ? LowerDarwin_VASTART(Op, DAG)
3562dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                     : LowerAAPCS_VASTART(Op, DAG);
356372062f5744557e270a38192554c3126ea5f97434Tim Northover}
356472062f5744557e270a38192554c3126ea5f97434Tim Northover
3565dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::LowerVACOPY(SDValue Op,
3566dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                           SelectionDAG &DAG) const {
3567dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // AAPCS has three pointers and two ints (= 32 bytes), Darwin has single
3568dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // pointer.
3569dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned VaListSize = Subtarget->isTargetDarwin() ? 8 : 32;
3570dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  const Value *DestSV = cast<SrcValueSDNode>(Op.getOperand(3))->getValue();
3571dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  const Value *SrcSV = cast<SrcValueSDNode>(Op.getOperand(4))->getValue();
357287773c318fcee853fb34a80a10c4347d523bdafbTim Northover
3573dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return DAG.getMemcpy(Op.getOperand(0), SDLoc(Op), Op.getOperand(1),
3574dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                       Op.getOperand(2), DAG.getConstant(VaListSize, MVT::i32),
3575dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                       8, false, false, MachinePointerInfo(DestSV),
3576dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                       MachinePointerInfo(SrcSV));
3577dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
357887773c318fcee853fb34a80a10c4347d523bdafbTim Northover
3579dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::LowerVAARG(SDValue Op, SelectionDAG &DAG) const {
3580dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  assert(Subtarget->isTargetDarwin() &&
3581dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines         "automatic va_arg instruction only works on Darwin");
358287773c318fcee853fb34a80a10c4347d523bdafbTim Northover
3583dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  const Value *V = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
3584dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT = Op.getValueType();
3585dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc DL(Op);
3586dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Chain = Op.getOperand(0);
3587dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Addr = Op.getOperand(1);
3588dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned Align = Op.getConstantOperandVal(3);
3589dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
3590dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue VAList = DAG.getLoad(getPointerTy(), DL, Chain, Addr,
3591dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                               MachinePointerInfo(V), false, false, false, 0);
3592dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Chain = VAList.getValue(1);
3593dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
3594dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Align > 8) {
3595dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    assert(((Align & (Align - 1)) == 0) && "Expected Align to be a power of 2");
3596dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    VAList = DAG.getNode(ISD::ADD, DL, getPointerTy(), VAList,
3597dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                         DAG.getConstant(Align - 1, getPointerTy()));
3598dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    VAList = DAG.getNode(ISD::AND, DL, getPointerTy(), VAList,
3599dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                         DAG.getConstant(-(int64_t)Align, getPointerTy()));
360087773c318fcee853fb34a80a10c4347d523bdafbTim Northover  }
360187773c318fcee853fb34a80a10c4347d523bdafbTim Northover
3602dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Type *ArgTy = VT.getTypeForEVT(*DAG.getContext());
3603dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  uint64_t ArgSize = getDataLayout()->getTypeAllocSize(ArgTy);
3604dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
3605dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Scalar integer and FP values smaller than 64 bits are implicitly extended
3606dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // up to 64 bits.  At the very least, we have to increase the striding of the
3607dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // vaargs list to match this, and for FP values we need to introduce
3608dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // FP_ROUND nodes as well.
3609dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (VT.isInteger() && !VT.isVector())
3610dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    ArgSize = 8;
3611dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  bool NeedFPTrunc = false;
3612dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (VT.isFloatingPoint() && !VT.isVector() && VT != MVT::f64) {
3613dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    ArgSize = 8;
3614dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    NeedFPTrunc = true;
361587773c318fcee853fb34a80a10c4347d523bdafbTim Northover  }
3616dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
3617dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Increment the pointer, VAList, to the next vaarg
3618dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue VANext = DAG.getNode(ISD::ADD, DL, getPointerTy(), VAList,
3619dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                               DAG.getConstant(ArgSize, getPointerTy()));
3620dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Store the incremented VAList to the legalized pointer
3621dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue APStore = DAG.getStore(Chain, DL, VANext, Addr, MachinePointerInfo(V),
3622dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                 false, false, 0);
3623dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
3624dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Load the actual argument out of the pointer VAList
3625dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (NeedFPTrunc) {
3626dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Load the value as an f64.
3627dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue WideFP = DAG.getLoad(MVT::f64, DL, APStore, VAList,
3628dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                 MachinePointerInfo(), false, false, false, 0);
3629dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Round the value down to an f32.
3630dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue NarrowFP = DAG.getNode(ISD::FP_ROUND, DL, VT, WideFP.getValue(0),
3631dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                   DAG.getIntPtrConstant(1));
3632dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue Ops[] = { NarrowFP, WideFP.getValue(1) };
3633dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Merge the rounded value with the chain output of the load.
3634dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getMergeValues(Ops, DL);
363587773c318fcee853fb34a80a10c4347d523bdafbTim Northover  }
363687773c318fcee853fb34a80a10c4347d523bdafbTim Northover
3637dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return DAG.getLoad(VT, DL, APStore, VAList, MachinePointerInfo(), false,
3638dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                     false, false, 0);
363987773c318fcee853fb34a80a10c4347d523bdafbTim Northover}
364087773c318fcee853fb34a80a10c4347d523bdafbTim Northover
3641dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::LowerFRAMEADDR(SDValue Op,
3642dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                              SelectionDAG &DAG) const {
3643dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
3644dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  MFI->setFrameAddressIsTaken(true);
364572062f5744557e270a38192554c3126ea5f97434Tim Northover
3646dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT = Op.getValueType();
3647dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc DL(Op);
3648dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
3649dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue FrameAddr =
3650dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      DAG.getCopyFromReg(DAG.getEntryNode(), DL, AArch64::FP, VT);
3651dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  while (Depth--)
3652dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    FrameAddr = DAG.getLoad(VT, DL, DAG.getEntryNode(), FrameAddr,
3653dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                            MachinePointerInfo(), false, false, false, 0);
3654dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return FrameAddr;
3655dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
365672062f5744557e270a38192554c3126ea5f97434Tim Northover
3657dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// FIXME? Maybe this could be a TableGen attribute on some registers and
3658dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// this table could be generated automatically from RegInfo.
3659dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesunsigned AArch64TargetLowering::getRegisterByName(const char* RegName,
3660dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                                  EVT VT) const {
3661dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned Reg = StringSwitch<unsigned>(RegName)
3662dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                       .Case("sp", AArch64::SP)
3663dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                       .Default(0);
3664dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Reg)
3665dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return Reg;
3666dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  report_fatal_error("Invalid register name global variable");
3667dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
366872062f5744557e270a38192554c3126ea5f97434Tim Northover
3669dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::LowerRETURNADDR(SDValue Op,
3670dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                               SelectionDAG &DAG) const {
3671dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  MachineFunction &MF = DAG.getMachineFunction();
3672dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  MachineFrameInfo *MFI = MF.getFrameInfo();
3673dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  MFI->setReturnAddressIsTaken(true);
367472062f5744557e270a38192554c3126ea5f97434Tim Northover
3675dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT = Op.getValueType();
3676dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc DL(Op);
3677dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
3678dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Depth) {
3679dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue FrameAddr = LowerFRAMEADDR(Op, DAG);
3680dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue Offset = DAG.getConstant(8, getPointerTy());
3681dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getLoad(VT, DL, DAG.getEntryNode(),
3682dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                       DAG.getNode(ISD::ADD, DL, VT, FrameAddr, Offset),
3683dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                       MachinePointerInfo(), false, false, false, 0);
368472062f5744557e270a38192554c3126ea5f97434Tim Northover  }
368572062f5744557e270a38192554c3126ea5f97434Tim Northover
3686dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Return LR, which contains the return address. Mark it an implicit live-in.
3687dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned Reg = MF.addLiveIn(AArch64::LR, &AArch64::GPR64RegClass);
3688dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return DAG.getCopyFromReg(DAG.getEntryNode(), DL, Reg, VT);
368972062f5744557e270a38192554c3126ea5f97434Tim Northover}
369072062f5744557e270a38192554c3126ea5f97434Tim Northover
3691dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// LowerShiftRightParts - Lower SRA_PARTS, which returns two
3692dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// i64 values and take a 2 x i64 value to shift plus a shift amount.
3693dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::LowerShiftRightParts(SDValue Op,
3694dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                                    SelectionDAG &DAG) const {
3695dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  assert(Op.getNumOperands() == 3 && "Not a double-shift!");
3696dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT = Op.getValueType();
3697dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned VTBits = VT.getSizeInBits();
3698dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc dl(Op);
3699dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue ShOpLo = Op.getOperand(0);
3700dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue ShOpHi = Op.getOperand(1);
3701dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue ShAmt = Op.getOperand(2);
3702dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue ARMcc;
3703dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned Opc = (Op.getOpcode() == ISD::SRA_PARTS) ? ISD::SRA : ISD::SRL;
370472062f5744557e270a38192554c3126ea5f97434Tim Northover
3705dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  assert(Op.getOpcode() == ISD::SRA_PARTS || Op.getOpcode() == ISD::SRL_PARTS);
370672062f5744557e270a38192554c3126ea5f97434Tim Northover
3707dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue RevShAmt = DAG.getNode(ISD::SUB, dl, MVT::i64,
3708dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                 DAG.getConstant(VTBits, MVT::i64), ShAmt);
3709dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Tmp1 = DAG.getNode(ISD::SRL, dl, VT, ShOpLo, ShAmt);
3710dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue ExtraShAmt = DAG.getNode(ISD::SUB, dl, MVT::i64, ShAmt,
3711dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                   DAG.getConstant(VTBits, MVT::i64));
3712dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Tmp2 = DAG.getNode(ISD::SHL, dl, VT, ShOpHi, RevShAmt);
371372062f5744557e270a38192554c3126ea5f97434Tim Northover
3714dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Cmp = emitComparison(ExtraShAmt, DAG.getConstant(0, MVT::i64),
3715dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                               ISD::SETGE, dl, DAG);
3716dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue CCVal = DAG.getConstant(AArch64CC::GE, MVT::i32);
3717dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
3718dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue FalseValLo = DAG.getNode(ISD::OR, dl, VT, Tmp1, Tmp2);
3719dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue TrueValLo = DAG.getNode(Opc, dl, VT, ShOpHi, ExtraShAmt);
3720dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Lo =
3721dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      DAG.getNode(AArch64ISD::CSEL, dl, VT, TrueValLo, FalseValLo, CCVal, Cmp);
3722dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
3723dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // AArch64 shifts larger than the register width are wrapped rather than
3724dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // clamped, so we can't just emit "hi >> x".
3725dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue FalseValHi = DAG.getNode(Opc, dl, VT, ShOpHi, ShAmt);
3726dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue TrueValHi = Opc == ISD::SRA
3727dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                          ? DAG.getNode(Opc, dl, VT, ShOpHi,
3728dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                        DAG.getConstant(VTBits - 1, MVT::i64))
3729dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                          : DAG.getConstant(0, VT);
3730dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Hi =
3731dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      DAG.getNode(AArch64ISD::CSEL, dl, VT, TrueValHi, FalseValHi, CCVal, Cmp);
373272062f5744557e270a38192554c3126ea5f97434Tim Northover
3733dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Ops[2] = { Lo, Hi };
3734dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return DAG.getMergeValues(Ops, dl);
3735dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
373672062f5744557e270a38192554c3126ea5f97434Tim Northover
3737dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// LowerShiftLeftParts - Lower SHL_PARTS, which returns two
3738dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// i64 values and take a 2 x i64 value to shift plus a shift amount.
3739dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::LowerShiftLeftParts(SDValue Op,
3740dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                                 SelectionDAG &DAG) const {
3741dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  assert(Op.getNumOperands() == 3 && "Not a double-shift!");
3742dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT = Op.getValueType();
3743dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned VTBits = VT.getSizeInBits();
3744dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc dl(Op);
3745dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue ShOpLo = Op.getOperand(0);
3746dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue ShOpHi = Op.getOperand(1);
3747dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue ShAmt = Op.getOperand(2);
3748dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue ARMcc;
374972062f5744557e270a38192554c3126ea5f97434Tim Northover
3750dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  assert(Op.getOpcode() == ISD::SHL_PARTS);
3751dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue RevShAmt = DAG.getNode(ISD::SUB, dl, MVT::i64,
3752dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                 DAG.getConstant(VTBits, MVT::i64), ShAmt);
3753dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Tmp1 = DAG.getNode(ISD::SRL, dl, VT, ShOpLo, RevShAmt);
3754dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue ExtraShAmt = DAG.getNode(ISD::SUB, dl, MVT::i64, ShAmt,
3755dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                   DAG.getConstant(VTBits, MVT::i64));
3756dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Tmp2 = DAG.getNode(ISD::SHL, dl, VT, ShOpHi, ShAmt);
3757dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Tmp3 = DAG.getNode(ISD::SHL, dl, VT, ShOpLo, ExtraShAmt);
375872062f5744557e270a38192554c3126ea5f97434Tim Northover
3759dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue FalseVal = DAG.getNode(ISD::OR, dl, VT, Tmp1, Tmp2);
376072062f5744557e270a38192554c3126ea5f97434Tim Northover
3761dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Cmp = emitComparison(ExtraShAmt, DAG.getConstant(0, MVT::i64),
3762dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                               ISD::SETGE, dl, DAG);
3763dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue CCVal = DAG.getConstant(AArch64CC::GE, MVT::i32);
3764dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Hi =
3765dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      DAG.getNode(AArch64ISD::CSEL, dl, VT, Tmp3, FalseVal, CCVal, Cmp);
376672062f5744557e270a38192554c3126ea5f97434Tim Northover
3767dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // AArch64 shifts of larger than register sizes are wrapped rather than
3768dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // clamped, so we can't just emit "lo << a" if a is too big.
3769dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue TrueValLo = DAG.getConstant(0, VT);
3770dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue FalseValLo = DAG.getNode(ISD::SHL, dl, VT, ShOpLo, ShAmt);
3771dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Lo =
3772dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      DAG.getNode(AArch64ISD::CSEL, dl, VT, TrueValLo, FalseValLo, CCVal, Cmp);
377372062f5744557e270a38192554c3126ea5f97434Tim Northover
3774dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Ops[2] = { Lo, Hi };
3775dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return DAG.getMergeValues(Ops, dl);
377672062f5744557e270a38192554c3126ea5f97434Tim Northover}
377772062f5744557e270a38192554c3126ea5f97434Tim Northover
3778dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesbool AArch64TargetLowering::isOffsetFoldingLegal(
3779dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    const GlobalAddressSDNode *GA) const {
3780dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // The AArch64 target doesn't support folding offsets into global addresses.
3781dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return false;
3782dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
378372062f5744557e270a38192554c3126ea5f97434Tim Northover
3784dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesbool AArch64TargetLowering::isFPImmLegal(const APFloat &Imm, EVT VT) const {
3785dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // We can materialize #0.0 as fmov $Rd, XZR for 64-bit and 32-bit cases.
3786dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // FIXME: We should be able to handle f128 as well with a clever lowering.
3787dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Imm.isPosZero() && (VT == MVT::f64 || VT == MVT::f32))
3788dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return true;
378972062f5744557e270a38192554c3126ea5f97434Tim Northover
3790dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (VT == MVT::f64)
3791dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return AArch64_AM::getFP64Imm(Imm) != -1;
3792dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  else if (VT == MVT::f32)
3793dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return AArch64_AM::getFP32Imm(Imm) != -1;
3794dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return false;
3795dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
379672062f5744557e270a38192554c3126ea5f97434Tim Northover
3797dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//===----------------------------------------------------------------------===//
3798dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//                          AArch64 Optimization Hooks
3799dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//===----------------------------------------------------------------------===//
380072062f5744557e270a38192554c3126ea5f97434Tim Northover
3801dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//===----------------------------------------------------------------------===//
3802dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//                          AArch64 Inline Assembly Support
3803dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//===----------------------------------------------------------------------===//
380472062f5744557e270a38192554c3126ea5f97434Tim Northover
3805dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// Table of Constraints
3806dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// TODO: This is the current set of constraints supported by ARM for the
3807dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// compiler, not all of them may make sense, e.g. S may be difficult to support.
3808dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//
3809dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// r - A general register
3810dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// w - An FP/SIMD register of some size in the range v0-v31
3811dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// x - An FP/SIMD register of some size in the range v0-v15
3812dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// I - Constant that can be used with an ADD instruction
3813dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// J - Constant that can be used with a SUB instruction
3814dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// K - Constant that can be used with a 32-bit logical instruction
3815dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// L - Constant that can be used with a 64-bit logical instruction
3816dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// M - Constant that can be used as a 32-bit MOV immediate
3817dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// N - Constant that can be used as a 64-bit MOV immediate
3818dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// Q - A memory reference with base register and no offset
3819dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// S - A symbolic address
3820dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// Y - Floating point constant zero
3821dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// Z - Integer constant zero
3822dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//
3823dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//   Note that general register operands will be output using their 64-bit x
3824dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// register name, whatever the size of the variable, unless the asm operand
3825dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// is prefixed by the %w modifier. Floating-point and SIMD register operands
3826dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// will be output with the v prefix unless prefixed by the %b, %h, %s, %d or
3827dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// %q modifier.
3828dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
3829dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// getConstraintType - Given a constraint letter, return the type of
3830dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// constraint it is for this target.
3831dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesAArch64TargetLowering::ConstraintType
3832dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesAArch64TargetLowering::getConstraintType(const std::string &Constraint) const {
3833dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Constraint.size() == 1) {
3834dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    switch (Constraint[0]) {
3835dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    default:
3836dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      break;
3837dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case 'z':
3838dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return C_Other;
3839dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case 'x':
3840dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case 'w':
3841dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return C_RegisterClass;
3842dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // An address with a single base register. Due to the way we
3843dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // currently handle addresses it is the same as 'r'.
3844dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case 'Q':
3845dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return C_Memory;
3846dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
384772062f5744557e270a38192554c3126ea5f97434Tim Northover  }
3848dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return TargetLowering::getConstraintType(Constraint);
3849dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
385072062f5744557e270a38192554c3126ea5f97434Tim Northover
3851dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// Examine constraint type and operand type and determine a weight value.
3852dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// This object must already have been set up with the operand type
3853dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// and the current alternative constraint selected.
3854dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesTargetLowering::ConstraintWeight
3855dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesAArch64TargetLowering::getSingleConstraintMatchWeight(
3856dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    AsmOperandInfo &info, const char *constraint) const {
3857dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  ConstraintWeight weight = CW_Invalid;
3858dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Value *CallOperandVal = info.CallOperandVal;
3859dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // If we don't have a value, we can't do a match,
3860dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // but allow it at the lowest weight.
3861dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!CallOperandVal)
3862dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return CW_Default;
3863dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Type *type = CallOperandVal->getType();
3864dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Look at the constraint type.
3865dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  switch (*constraint) {
3866dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  default:
3867dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    weight = TargetLowering::getSingleConstraintMatchWeight(info, constraint);
3868dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
3869dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case 'x':
3870dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case 'w':
3871dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (type->isFloatingPointTy() || type->isVectorTy())
3872dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      weight = CW_Register;
3873dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
3874dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case 'z':
3875dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    weight = CW_Constant;
3876dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
3877dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
3878dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return weight;
387972062f5744557e270a38192554c3126ea5f97434Tim Northover}
388072062f5744557e270a38192554c3126ea5f97434Tim Northover
3881dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstd::pair<unsigned, const TargetRegisterClass *>
3882dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesAArch64TargetLowering::getRegForInlineAsmConstraint(
3883dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    const std::string &Constraint, MVT VT) const {
3884dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Constraint.size() == 1) {
3885dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    switch (Constraint[0]) {
3886dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case 'r':
3887dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (VT.getSizeInBits() == 64)
3888dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return std::make_pair(0U, &AArch64::GPR64commonRegClass);
3889dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return std::make_pair(0U, &AArch64::GPR32commonRegClass);
3890dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case 'w':
3891dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (VT == MVT::f32)
3892dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return std::make_pair(0U, &AArch64::FPR32RegClass);
3893dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (VT.getSizeInBits() == 64)
3894dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return std::make_pair(0U, &AArch64::FPR64RegClass);
3895dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (VT.getSizeInBits() == 128)
3896dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return std::make_pair(0U, &AArch64::FPR128RegClass);
3897dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      break;
3898dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // The instructions that this constraint is designed for can
3899dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // only take 128-bit registers so just use that regclass.
3900dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case 'x':
3901dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (VT.getSizeInBits() == 128)
3902dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return std::make_pair(0U, &AArch64::FPR128_loRegClass);
3903dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      break;
3904dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
3905dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
3906dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (StringRef("{cc}").equals_lower(Constraint))
3907dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return std::make_pair(unsigned(AArch64::NZCV), &AArch64::CCRRegClass);
390872062f5744557e270a38192554c3126ea5f97434Tim Northover
3909dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Use the default implementation in TargetLowering to convert the register
3910dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // constraint into a member of a register class.
3911dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  std::pair<unsigned, const TargetRegisterClass *> Res;
3912dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Res = TargetLowering::getRegForInlineAsmConstraint(Constraint, VT);
3913dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
3914dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Not found as a standard register?
3915dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!Res.second) {
3916dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned Size = Constraint.size();
3917dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if ((Size == 4 || Size == 5) && Constraint[0] == '{' &&
3918dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        tolower(Constraint[1]) == 'v' && Constraint[Size - 1] == '}') {
3919dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      const std::string Reg =
3920dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          std::string(&Constraint[2], &Constraint[Size - 1]);
3921dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      int RegNo = atoi(Reg.c_str());
3922dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (RegNo >= 0 && RegNo <= 31) {
3923dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // v0 - v31 are aliases of q0 - q31.
3924dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // By default we'll emit v0-v31 for this unless there's a modifier where
3925dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // we'll emit the correct register as well.
3926dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        Res.first = AArch64::FPR128RegClass.getRegister(RegNo);
3927dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        Res.second = &AArch64::FPR128RegClass;
3928dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
3929dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
3930dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
393172062f5744557e270a38192554c3126ea5f97434Tim Northover
3932dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return Res;
393372062f5744557e270a38192554c3126ea5f97434Tim Northover}
393472062f5744557e270a38192554c3126ea5f97434Tim Northover
3935dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// LowerAsmOperandForConstraint - Lower the specified operand into the Ops
3936dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// vector.  If it is invalid, don't add anything to Ops.
3937dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesvoid AArch64TargetLowering::LowerAsmOperandForConstraint(
3938dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue Op, std::string &Constraint, std::vector<SDValue> &Ops,
3939dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SelectionDAG &DAG) const {
3940dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Result;
394172062f5744557e270a38192554c3126ea5f97434Tim Northover
3942dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Currently only support length 1 constraints.
3943dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Constraint.length() != 1)
3944dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return;
394572062f5744557e270a38192554c3126ea5f97434Tim Northover
3946dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  char ConstraintLetter = Constraint[0];
3947dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  switch (ConstraintLetter) {
3948dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  default:
3949dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
395072062f5744557e270a38192554c3126ea5f97434Tim Northover
3951dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // This set of constraints deal with valid constants for various instructions.
3952dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Validate and return a target constant for them if we can.
3953dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case 'z': {
3954dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // 'z' maps to xzr or wzr so it needs an input of 0.
3955dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op);
3956dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (!C || C->getZExtValue() != 0)
3957dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return;
395872062f5744557e270a38192554c3126ea5f97434Tim Northover
3959dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (Op.getValueType() == MVT::i64)
3960dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Result = DAG.getRegister(AArch64::XZR, MVT::i64);
3961dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    else
3962dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Result = DAG.getRegister(AArch64::WZR, MVT::i32);
3963dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
3964dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
396572062f5744557e270a38192554c3126ea5f97434Tim Northover
3966dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case 'I':
3967dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case 'J':
3968dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case 'K':
3969dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case 'L':
3970dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case 'M':
3971dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case 'N':
3972dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op);
3973dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (!C)
3974dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return;
397572062f5744557e270a38192554c3126ea5f97434Tim Northover
3976dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Grab the value and do some validation.
3977dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    uint64_t CVal = C->getZExtValue();
3978dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    switch (ConstraintLetter) {
3979dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // The I constraint applies only to simple ADD or SUB immediate operands:
3980dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // i.e. 0 to 4095 with optional shift by 12
3981dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // The J constraint applies only to ADD or SUB immediates that would be
3982dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // valid when negated, i.e. if [an add pattern] were to be output as a SUB
3983dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // instruction [or vice versa], in other words -1 to -4095 with optional
3984dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // left shift by 12.
3985dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case 'I':
3986dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (isUInt<12>(CVal) || isShiftedUInt<12, 12>(CVal))
3987dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        break;
3988dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return;
3989dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case 'J': {
3990dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      uint64_t NVal = -C->getSExtValue();
3991dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (isUInt<12>(NVal) || isShiftedUInt<12, 12>(NVal))
3992dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        break;
3993dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return;
3994dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
3995dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // The K and L constraints apply *only* to logical immediates, including
3996dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // what used to be the MOVI alias for ORR (though the MOVI alias has now
3997dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // been removed and MOV should be used). So these constraints have to
3998dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // distinguish between bit patterns that are valid 32-bit or 64-bit
3999dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // "bitmask immediates": for example 0xaaaaaaaa is a valid bimm32 (K), but
4000dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // not a valid bimm64 (L) where 0xaaaaaaaaaaaaaaaa would be valid, and vice
4001dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // versa.
4002dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case 'K':
4003dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (AArch64_AM::isLogicalImmediate(CVal, 32))
4004dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        break;
4005dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return;
4006dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case 'L':
4007dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (AArch64_AM::isLogicalImmediate(CVal, 64))
4008dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        break;
4009dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return;
4010dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // The M and N constraints are a superset of K and L respectively, for use
4011dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // with the MOV (immediate) alias. As well as the logical immediates they
4012dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // also match 32 or 64-bit immediates that can be loaded either using a
4013dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // *single* MOVZ or MOVN , such as 32-bit 0x12340000, 0x00001234, 0xffffedca
4014dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // (M) or 64-bit 0x1234000000000000 (N) etc.
4015dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // As a note some of this code is liberally stolen from the asm parser.
4016dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case 'M': {
4017dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (!isUInt<32>(CVal))
4018dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return;
4019dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (AArch64_AM::isLogicalImmediate(CVal, 32))
4020dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        break;
4021dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if ((CVal & 0xFFFF) == CVal)
4022dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        break;
4023dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if ((CVal & 0xFFFF0000ULL) == CVal)
4024dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        break;
4025dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      uint64_t NCVal = ~(uint32_t)CVal;
4026dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if ((NCVal & 0xFFFFULL) == NCVal)
4027dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        break;
4028dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if ((NCVal & 0xFFFF0000ULL) == NCVal)
4029dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        break;
4030dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return;
4031dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
4032dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case 'N': {
4033dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (AArch64_AM::isLogicalImmediate(CVal, 64))
4034dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        break;
4035dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if ((CVal & 0xFFFFULL) == CVal)
4036dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        break;
4037dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if ((CVal & 0xFFFF0000ULL) == CVal)
4038dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        break;
4039dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if ((CVal & 0xFFFF00000000ULL) == CVal)
4040dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        break;
4041dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if ((CVal & 0xFFFF000000000000ULL) == CVal)
4042dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        break;
4043dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      uint64_t NCVal = ~CVal;
4044dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if ((NCVal & 0xFFFFULL) == NCVal)
4045dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        break;
4046dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if ((NCVal & 0xFFFF0000ULL) == NCVal)
4047dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        break;
4048dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if ((NCVal & 0xFFFF00000000ULL) == NCVal)
4049dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        break;
4050dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if ((NCVal & 0xFFFF000000000000ULL) == NCVal)
4051dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        break;
4052dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return;
4053dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
4054dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    default:
4055dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return;
4056dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
405772062f5744557e270a38192554c3126ea5f97434Tim Northover
4058dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // All assembler immediates are 64-bit integers.
4059dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Result = DAG.getTargetConstant(CVal, MVT::i64);
4060dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
406172062f5744557e270a38192554c3126ea5f97434Tim Northover  }
406272062f5744557e270a38192554c3126ea5f97434Tim Northover
4063dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Result.getNode()) {
4064dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Ops.push_back(Result);
4065dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return;
4066dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
406772062f5744557e270a38192554c3126ea5f97434Tim Northover
4068dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return TargetLowering::LowerAsmOperandForConstraint(Op, Constraint, Ops, DAG);
4069dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
407072062f5744557e270a38192554c3126ea5f97434Tim Northover
4071dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//===----------------------------------------------------------------------===//
4072dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//                     AArch64 Advanced SIMD Support
4073dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//===----------------------------------------------------------------------===//
407472062f5744557e270a38192554c3126ea5f97434Tim Northover
4075dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// WidenVector - Given a value in the V64 register class, produce the
4076dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// equivalent value in the V128 register class.
4077dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue WidenVector(SDValue V64Reg, SelectionDAG &DAG) {
4078dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT = V64Reg.getValueType();
4079dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned NarrowSize = VT.getVectorNumElements();
4080dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  MVT EltTy = VT.getVectorElementType().getSimpleVT();
4081dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  MVT WideTy = MVT::getVectorVT(EltTy, 2 * NarrowSize);
4082dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc DL(V64Reg);
4083dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4084dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return DAG.getNode(ISD::INSERT_SUBVECTOR, DL, WideTy, DAG.getUNDEF(WideTy),
4085dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                     V64Reg, DAG.getConstant(0, MVT::i32));
4086dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
408772062f5744557e270a38192554c3126ea5f97434Tim Northover
4088dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// getExtFactor - Determine the adjustment factor for the position when
4089dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// generating an "extract from vector registers" instruction.
4090dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic unsigned getExtFactor(SDValue &V) {
4091dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT EltType = V.getValueType().getVectorElementType();
4092dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return EltType.getSizeInBits() / 8;
4093dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
409472062f5744557e270a38192554c3126ea5f97434Tim Northover
4095dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// NarrowVector - Given a value in the V128 register class, produce the
4096dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// equivalent value in the V64 register class.
4097dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue NarrowVector(SDValue V128Reg, SelectionDAG &DAG) {
4098dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT = V128Reg.getValueType();
4099dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned WideSize = VT.getVectorNumElements();
4100dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  MVT EltTy = VT.getVectorElementType().getSimpleVT();
4101dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  MVT NarrowTy = MVT::getVectorVT(EltTy, WideSize / 2);
4102dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc DL(V128Reg);
410372062f5744557e270a38192554c3126ea5f97434Tim Northover
4104dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return DAG.getTargetExtractSubreg(AArch64::dsub, DL, NarrowTy, V128Reg);
4105dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
410687773c318fcee853fb34a80a10c4347d523bdafbTim Northover
4107dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// Gather data to see if the operation can be modelled as a
4108dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// shuffle in combination with VEXTs.
4109dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::ReconstructShuffle(SDValue Op,
4110dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                                  SelectionDAG &DAG) const {
4111cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines  assert(Op.getOpcode() == ISD::BUILD_VECTOR && "Unknown opcode!");
4112dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc dl(Op);
4113dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT = Op.getValueType();
4114dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned NumElts = VT.getVectorNumElements();
411587773c318fcee853fb34a80a10c4347d523bdafbTim Northover
4116dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SmallVector<SDValue, 2> SourceVecs;
4117dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SmallVector<unsigned, 2> MinElts;
4118dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SmallVector<unsigned, 2> MaxElts;
411987773c318fcee853fb34a80a10c4347d523bdafbTim Northover
4120dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  for (unsigned i = 0; i < NumElts; ++i) {
4121dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue V = Op.getOperand(i);
4122dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (V.getOpcode() == ISD::UNDEF)
4123dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      continue;
4124dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    else if (V.getOpcode() != ISD::EXTRACT_VECTOR_ELT) {
4125dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // A shuffle can only come from building a vector from various
4126dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // elements of other vectors.
4127dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return SDValue();
4128dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
412987773c318fcee853fb34a80a10c4347d523bdafbTim Northover
4130dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Record this extraction against the appropriate vector if possible...
4131dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue SourceVec = V.getOperand(0);
4132dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned EltNo = cast<ConstantSDNode>(V.getOperand(1))->getZExtValue();
4133dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    bool FoundSource = false;
4134dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    for (unsigned j = 0; j < SourceVecs.size(); ++j) {
4135dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (SourceVecs[j] == SourceVec) {
4136dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        if (MinElts[j] > EltNo)
4137dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          MinElts[j] = EltNo;
4138dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        if (MaxElts[j] < EltNo)
4139dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          MaxElts[j] = EltNo;
4140dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        FoundSource = true;
4141dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        break;
414287773c318fcee853fb34a80a10c4347d523bdafbTim Northover      }
414387773c318fcee853fb34a80a10c4347d523bdafbTim Northover    }
4144dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4145dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Or record a new source if not...
4146dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (!FoundSource) {
4147dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      SourceVecs.push_back(SourceVec);
4148dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      MinElts.push_back(EltNo);
4149dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      MaxElts.push_back(EltNo);
4150dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
415187773c318fcee853fb34a80a10c4347d523bdafbTim Northover  }
415287773c318fcee853fb34a80a10c4347d523bdafbTim Northover
4153dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Currently only do something sane when at most two source vectors
4154dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // involved.
4155dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (SourceVecs.size() > 2)
4156dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
415772062f5744557e270a38192554c3126ea5f97434Tim Northover
4158dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue ShuffleSrcs[2] = { DAG.getUNDEF(VT), DAG.getUNDEF(VT) };
4159dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  int VEXTOffsets[2] = { 0, 0 };
4160cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines  int OffsetMultipliers[2] = { 1, 1 };
416172062f5744557e270a38192554c3126ea5f97434Tim Northover
4162dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // This loop extracts the usage patterns of the source vectors
4163dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // and prepares appropriate SDValues for a shuffle if possible.
4164dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  for (unsigned i = 0; i < SourceVecs.size(); ++i) {
4165cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines    unsigned NumSrcElts = SourceVecs[i].getValueType().getVectorNumElements();
4166cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines    SDValue CurSource = SourceVecs[i];
4167cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines    if (SourceVecs[i].getValueType().getVectorElementType() !=
4168cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines        VT.getVectorElementType()) {
4169cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      // It may hit this case if SourceVecs[i] is AssertSext/AssertZext.
4170cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      // Then bitcast it to the vector which holds asserted element type,
4171cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      // and record the multiplier of element width between SourceVecs and
4172cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      // Build_vector which is needed to extract the correct lanes later.
4173cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      EVT CastVT =
4174cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines          EVT::getVectorVT(*DAG.getContext(), VT.getVectorElementType(),
4175cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines                           SourceVecs[i].getValueSizeInBits() /
4176cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines                               VT.getVectorElementType().getSizeInBits());
4177cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines
4178cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      CurSource = DAG.getNode(ISD::BITCAST, dl, CastVT, SourceVecs[i]);
4179cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      OffsetMultipliers[i] = CastVT.getVectorNumElements() / NumSrcElts;
4180cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      NumSrcElts *= OffsetMultipliers[i];
4181cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      MaxElts[i] *= OffsetMultipliers[i];
4182cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      MinElts[i] *= OffsetMultipliers[i];
4183cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines    }
4184cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines
4185cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines    if (CurSource.getValueType() == VT) {
4186dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // No VEXT necessary
4187cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      ShuffleSrcs[i] = CurSource;
4188dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      VEXTOffsets[i] = 0;
4189dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      continue;
4190cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines    } else if (NumSrcElts < NumElts) {
4191dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // We can pad out the smaller vector for free, so if it's part of a
4192dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // shuffle...
4193cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      ShuffleSrcs[i] = DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, CurSource,
4194cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines                                   DAG.getUNDEF(CurSource.getValueType()));
4195dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      continue;
4196dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
419772062f5744557e270a38192554c3126ea5f97434Tim Northover
4198dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Since only 64-bit and 128-bit vectors are legal on ARM and
4199dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // we've eliminated the other cases...
4200cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines    assert(NumSrcElts == 2 * NumElts &&
4201dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines           "unexpected vector sizes in ReconstructShuffle");
420272062f5744557e270a38192554c3126ea5f97434Tim Northover
4203dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (MaxElts[i] - MinElts[i] >= NumElts) {
4204dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // Span too large for a VEXT to cope
4205dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return SDValue();
4206dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
420772062f5744557e270a38192554c3126ea5f97434Tim Northover
4208dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (MinElts[i] >= NumElts) {
4209dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // The extraction can just take the second half
4210dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      VEXTOffsets[i] = NumElts;
4211cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      ShuffleSrcs[i] = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT, CurSource,
4212cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines                                   DAG.getIntPtrConstant(NumElts));
4213dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    } else if (MaxElts[i] < NumElts) {
4214dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // The extraction can just take the first half
4215dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      VEXTOffsets[i] = 0;
4216cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      ShuffleSrcs[i] = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT, CurSource,
4217cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines                                   DAG.getIntPtrConstant(0));
4218dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    } else {
4219dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // An actual VEXT is needed
4220dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      VEXTOffsets[i] = MinElts[i];
4221cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      SDValue VEXTSrc1 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT, CurSource,
4222cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines                                     DAG.getIntPtrConstant(0));
4223cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      SDValue VEXTSrc2 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT, CurSource,
4224cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines                                     DAG.getIntPtrConstant(NumElts));
4225dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      unsigned Imm = VEXTOffsets[i] * getExtFactor(VEXTSrc1);
4226dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      ShuffleSrcs[i] = DAG.getNode(AArch64ISD::EXT, dl, VT, VEXTSrc1, VEXTSrc2,
4227dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                   DAG.getConstant(Imm, MVT::i32));
4228dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
4229dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
423072062f5744557e270a38192554c3126ea5f97434Tim Northover
4231dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SmallVector<int, 8> Mask;
423272062f5744557e270a38192554c3126ea5f97434Tim Northover
4233dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  for (unsigned i = 0; i < NumElts; ++i) {
4234dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue Entry = Op.getOperand(i);
4235dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (Entry.getOpcode() == ISD::UNDEF) {
4236dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Mask.push_back(-1);
4237dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      continue;
4238dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
423972062f5744557e270a38192554c3126ea5f97434Tim Northover
4240dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue ExtractVec = Entry.getOperand(0);
4241dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    int ExtractElt =
4242dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        cast<ConstantSDNode>(Op.getOperand(i).getOperand(1))->getSExtValue();
4243dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (ExtractVec == SourceVecs[0]) {
4244cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      Mask.push_back(ExtractElt * OffsetMultipliers[0] - VEXTOffsets[0]);
4245dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    } else {
4246cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      Mask.push_back(ExtractElt * OffsetMultipliers[1] + NumElts -
4247cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines                     VEXTOffsets[1]);
4248dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
4249dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
425072062f5744557e270a38192554c3126ea5f97434Tim Northover
4251dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Final check before we try to produce nonsense...
4252dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (isShuffleMaskLegal(Mask, VT))
4253dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getVectorShuffle(VT, dl, ShuffleSrcs[0], ShuffleSrcs[1],
4254dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                &Mask[0]);
425572062f5744557e270a38192554c3126ea5f97434Tim Northover
4256dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return SDValue();
425772062f5744557e270a38192554c3126ea5f97434Tim Northover}
425872062f5744557e270a38192554c3126ea5f97434Tim Northover
4259dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// check if an EXT instruction can handle the shuffle mask when the
4260dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// vector sources of the shuffle are the same.
4261dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic bool isSingletonEXTMask(ArrayRef<int> M, EVT VT, unsigned &Imm) {
4262dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned NumElts = VT.getVectorNumElements();
4263d9767021f83879429e930b068d1d6aef22285b33Hao Liu
4264dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Assume that the first shuffle index is not UNDEF.  Fail if it is.
4265dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (M[0] < 0)
4266d9767021f83879429e930b068d1d6aef22285b33Hao Liu    return false;
4267d9767021f83879429e930b068d1d6aef22285b33Hao Liu
4268dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Imm = M[0];
426919fdc268c316b3b0bdcb2b558449819f4f402d6aHao Liu
4270dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // If this is a VEXT shuffle, the immediate value is the index of the first
4271dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // element.  The other shuffle indices must be the successive elements after
4272dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // the first one.
4273dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned ExpectedElt = Imm;
4274dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  for (unsigned i = 1; i < NumElts; ++i) {
4275dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Increment the expected index.  If it wraps around, just follow it
4276dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // back to index zero and keep going.
4277dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    ++ExpectedElt;
4278dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (ExpectedElt == NumElts)
4279dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      ExpectedElt = 0;
4280d9767021f83879429e930b068d1d6aef22285b33Hao Liu
4281dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (M[i] < 0)
4282dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      continue; // ignore UNDEF indices
4283dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (ExpectedElt != static_cast<unsigned>(M[i]))
4284dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return false;
428536b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines  }
428636b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
4287dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return true;
4288dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
428919fdc268c316b3b0bdcb2b558449819f4f402d6aHao Liu
4290dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// check if an EXT instruction can handle the shuffle mask when the
4291dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// vector sources of the shuffle are different.
4292dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic bool isEXTMask(ArrayRef<int> M, EVT VT, bool &ReverseEXT,
4293dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                      unsigned &Imm) {
4294dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Look for the first non-undef element.
4295dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  const int *FirstRealElt = std::find_if(M.begin(), M.end(),
4296dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      [](int Elt) {return Elt >= 0;});
429719fdc268c316b3b0bdcb2b558449819f4f402d6aHao Liu
4298dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Benefit form APInt to handle overflow when calculating expected element.
4299dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned NumElts = VT.getVectorNumElements();
4300dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned MaskBits = APInt(32, NumElts * 2).logBase2();
4301dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  APInt ExpectedElt = APInt(MaskBits, *FirstRealElt + 1);
4302dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // The following shuffle indices must be the successive elements after the
4303dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // first real element.
4304dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  const int *FirstWrongElt = std::find_if(FirstRealElt + 1, M.end(),
4305dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      [&](int Elt) {return Elt != ExpectedElt++ && Elt != -1;});
4306dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (FirstWrongElt != M.end())
4307dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return false;
430819fdc268c316b3b0bdcb2b558449819f4f402d6aHao Liu
4309dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // The index of an EXT is the first element if it is not UNDEF.
4310dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Watch out for the beginning UNDEFs. The EXT index should be the expected
4311dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // value of the first element.  E.g.
4312dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // <-1, -1, 3, ...> is treated as <1, 2, 3, ...>.
4313dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // <-1, -1, 0, 1, ...> is treated as <2*NumElts-2, 2*NumElts-1, 0, 1, ...>.
4314dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // ExpectedElt is the last mask index plus 1.
4315dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Imm = ExpectedElt.getZExtValue();
4316dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4317dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // There are two difference cases requiring to reverse input vectors.
4318dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // For example, for vector <4 x i32> we have the following cases,
4319dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Case 1: shufflevector(<4 x i32>,<4 x i32>,<-1, -1, -1, 0>)
4320dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Case 2: shufflevector(<4 x i32>,<4 x i32>,<-1, -1, 7, 0>)
4321dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // For both cases, we finally use mask <5, 6, 7, 0>, which requires
4322dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // to reverse two input vectors.
4323dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Imm < NumElts)
4324dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    ReverseEXT = true;
4325dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  else
4326dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Imm -= NumElts;
432719fdc268c316b3b0bdcb2b558449819f4f402d6aHao Liu
4328dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return true;
432919fdc268c316b3b0bdcb2b558449819f4f402d6aHao Liu}
433019fdc268c316b3b0bdcb2b558449819f4f402d6aHao Liu
4331dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// isREVMask - Check if a vector shuffle corresponds to a REV
4332dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// instruction with the specified blocksize.  (The order of the elements
4333dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// within each block of the vector is reversed.)
4334dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic bool isREVMask(ArrayRef<int> M, EVT VT, unsigned BlockSize) {
4335dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  assert((BlockSize == 16 || BlockSize == 32 || BlockSize == 64) &&
4336dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines         "Only possible block sizes for REV are: 16, 32, 64");
4337dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4338dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned EltSz = VT.getVectorElementType().getSizeInBits();
4339dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (EltSz == 64)
4340dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return false;
4341dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4342dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned NumElts = VT.getVectorNumElements();
4343dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned BlockElts = M[0] + 1;
4344dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // If the first shuffle index is UNDEF, be optimistic.
4345dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (M[0] < 0)
4346dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    BlockElts = BlockSize / EltSz;
4347dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4348dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (BlockSize <= EltSz || BlockSize != BlockElts * EltSz)
4349dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return false;
4350dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4351dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  for (unsigned i = 0; i < NumElts; ++i) {
4352dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (M[i] < 0)
4353dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      continue; // ignore UNDEF indices
4354dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if ((unsigned)M[i] != (i - i % BlockElts) + (BlockElts - 1 - i % BlockElts))
4355dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return false;
4356d9767021f83879429e930b068d1d6aef22285b33Hao Liu  }
4357d9767021f83879429e930b068d1d6aef22285b33Hao Liu
4358dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return true;
4359d9767021f83879429e930b068d1d6aef22285b33Hao Liu}
436072062f5744557e270a38192554c3126ea5f97434Tim Northover
4361dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic bool isZIPMask(ArrayRef<int> M, EVT VT, unsigned &WhichResult) {
4362dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned NumElts = VT.getVectorNumElements();
4363dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  WhichResult = (M[0] == 0 ? 0 : 1);
4364dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned Idx = WhichResult * NumElts / 2;
4365dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  for (unsigned i = 0; i != NumElts; i += 2) {
4366dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if ((M[i] >= 0 && (unsigned)M[i] != Idx) ||
4367dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        (M[i + 1] >= 0 && (unsigned)M[i + 1] != Idx + NumElts))
4368dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return false;
4369dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Idx += 1;
4370dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
4371591c2f738a3e12026ff5504a486d54fc21fb3049Hao Liu
4372dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return true;
4373dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
4374591c2f738a3e12026ff5504a486d54fc21fb3049Hao Liu
4375dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic bool isUZPMask(ArrayRef<int> M, EVT VT, unsigned &WhichResult) {
4376dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned NumElts = VT.getVectorNumElements();
4377dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  WhichResult = (M[0] == 0 ? 0 : 1);
4378dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  for (unsigned i = 0; i != NumElts; ++i) {
4379dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (M[i] < 0)
4380dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      continue; // ignore UNDEF indices
4381dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if ((unsigned)M[i] != 2 * i + WhichResult)
4382dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return false;
4383dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
4384591c2f738a3e12026ff5504a486d54fc21fb3049Hao Liu
4385dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return true;
4386dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
4387591c2f738a3e12026ff5504a486d54fc21fb3049Hao Liu
4388dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic bool isTRNMask(ArrayRef<int> M, EVT VT, unsigned &WhichResult) {
4389dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned NumElts = VT.getVectorNumElements();
4390dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  WhichResult = (M[0] == 0 ? 0 : 1);
4391dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  for (unsigned i = 0; i < NumElts; i += 2) {
4392dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if ((M[i] >= 0 && (unsigned)M[i] != i + WhichResult) ||
4393dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        (M[i + 1] >= 0 && (unsigned)M[i + 1] != i + NumElts + WhichResult))
4394dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return false;
4395dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
4396dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return true;
4397dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
4398591c2f738a3e12026ff5504a486d54fc21fb3049Hao Liu
4399dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// isZIP_v_undef_Mask - Special case of isZIPMask for canonical form of
4400dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// "vector_shuffle v, v", i.e., "vector_shuffle v, undef".
4401dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// Mask is e.g., <0, 0, 1, 1> instead of <0, 4, 1, 5>.
4402dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic bool isZIP_v_undef_Mask(ArrayRef<int> M, EVT VT, unsigned &WhichResult) {
4403dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned NumElts = VT.getVectorNumElements();
4404dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  WhichResult = (M[0] == 0 ? 0 : 1);
4405dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned Idx = WhichResult * NumElts / 2;
4406dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  for (unsigned i = 0; i != NumElts; i += 2) {
4407dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if ((M[i] >= 0 && (unsigned)M[i] != Idx) ||
4408dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        (M[i + 1] >= 0 && (unsigned)M[i + 1] != Idx))
4409dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return false;
4410dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Idx += 1;
4411dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
4412591c2f738a3e12026ff5504a486d54fc21fb3049Hao Liu
4413dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return true;
4414dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
4415591c2f738a3e12026ff5504a486d54fc21fb3049Hao Liu
4416dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// isUZP_v_undef_Mask - Special case of isUZPMask for canonical form of
4417dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// "vector_shuffle v, v", i.e., "vector_shuffle v, undef".
4418dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// Mask is e.g., <0, 2, 0, 2> instead of <0, 2, 4, 6>,
4419dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic bool isUZP_v_undef_Mask(ArrayRef<int> M, EVT VT, unsigned &WhichResult) {
4420dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned Half = VT.getVectorNumElements() / 2;
4421dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  WhichResult = (M[0] == 0 ? 0 : 1);
4422dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  for (unsigned j = 0; j != 2; ++j) {
4423dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned Idx = WhichResult;
4424dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    for (unsigned i = 0; i != Half; ++i) {
4425dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      int MIdx = M[i + j * Half];
4426dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (MIdx >= 0 && (unsigned)MIdx != Idx)
4427dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return false;
4428dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Idx += 2;
4429591c2f738a3e12026ff5504a486d54fc21fb3049Hao Liu    }
4430dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
4431591c2f738a3e12026ff5504a486d54fc21fb3049Hao Liu
4432dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return true;
4433dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
4434591c2f738a3e12026ff5504a486d54fc21fb3049Hao Liu
4435dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// isTRN_v_undef_Mask - Special case of isTRNMask for canonical form of
4436dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// "vector_shuffle v, v", i.e., "vector_shuffle v, undef".
4437dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// Mask is e.g., <0, 0, 2, 2> instead of <0, 4, 2, 6>.
4438dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic bool isTRN_v_undef_Mask(ArrayRef<int> M, EVT VT, unsigned &WhichResult) {
4439dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned NumElts = VT.getVectorNumElements();
4440dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  WhichResult = (M[0] == 0 ? 0 : 1);
4441dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  for (unsigned i = 0; i < NumElts; i += 2) {
4442dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if ((M[i] >= 0 && (unsigned)M[i] != i + WhichResult) ||
4443dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        (M[i + 1] >= 0 && (unsigned)M[i + 1] != i + WhichResult))
4444dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return false;
4445591c2f738a3e12026ff5504a486d54fc21fb3049Hao Liu  }
4446dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return true;
4447591c2f738a3e12026ff5504a486d54fc21fb3049Hao Liu}
4448591c2f738a3e12026ff5504a486d54fc21fb3049Hao Liu
4449dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic bool isINSMask(ArrayRef<int> M, int NumInputElements,
4450dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                      bool &DstIsLeft, int &Anomaly) {
4451dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (M.size() != static_cast<size_t>(NumInputElements))
4452dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return false;
445336c7806f4eacd676932ba630246f88e0e37b1cd4Hao Liu
4454dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  int NumLHSMatch = 0, NumRHSMatch = 0;
4455dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  int LastLHSMismatch = -1, LastRHSMismatch = -1;
445636c7806f4eacd676932ba630246f88e0e37b1cd4Hao Liu
4457dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  for (int i = 0; i < NumInputElements; ++i) {
4458dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (M[i] == -1) {
4459dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      ++NumLHSMatch;
4460dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      ++NumRHSMatch;
446136c7806f4eacd676932ba630246f88e0e37b1cd4Hao Liu      continue;
4462dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
446336c7806f4eacd676932ba630246f88e0e37b1cd4Hao Liu
4464dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (M[i] == i)
4465dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      ++NumLHSMatch;
4466dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    else
4467dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      LastLHSMismatch = i;
4468dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4469dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (M[i] == i + NumInputElements)
4470dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      ++NumRHSMatch;
4471dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    else
4472dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      LastRHSMismatch = i;
447336c7806f4eacd676932ba630246f88e0e37b1cd4Hao Liu  }
447436c7806f4eacd676932ba630246f88e0e37b1cd4Hao Liu
4475dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (NumLHSMatch == NumInputElements - 1) {
4476dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    DstIsLeft = true;
4477dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Anomaly = LastLHSMismatch;
4478dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return true;
4479dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  } else if (NumRHSMatch == NumInputElements - 1) {
4480dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    DstIsLeft = false;
4481dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Anomaly = LastRHSMismatch;
4482dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return true;
4483dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
448436c7806f4eacd676932ba630246f88e0e37b1cd4Hao Liu
4485dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return false;
448636c7806f4eacd676932ba630246f88e0e37b1cd4Hao Liu}
448736c7806f4eacd676932ba630246f88e0e37b1cd4Hao Liu
4488dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic bool isConcatMask(ArrayRef<int> Mask, EVT VT, bool SplitLHS) {
4489dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (VT.getSizeInBits() != 128)
4490dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return false;
449136b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
4492dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned NumElts = VT.getVectorNumElements();
449336b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
4494dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  for (int I = 0, E = NumElts / 2; I != E; I++) {
4495dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (Mask[I] != I)
4496dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return false;
4497dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
449836b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
4499dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  int Offset = NumElts / 2;
4500dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  for (int I = NumElts / 2, E = NumElts; I != E; I++) {
4501dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (Mask[I] != I + SplitLHS * Offset)
4502dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return false;
4503dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
450436b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
4505dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return true;
450636b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines}
450736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
4508dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue tryFormConcatFromShuffle(SDValue Op, SelectionDAG &DAG) {
4509dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc DL(Op);
4510dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT = Op.getValueType();
4511dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue V0 = Op.getOperand(0);
4512dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue V1 = Op.getOperand(1);
4513dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  ArrayRef<int> Mask = cast<ShuffleVectorSDNode>(Op)->getMask();
451436b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
4515dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (VT.getVectorElementType() != V0.getValueType().getVectorElementType() ||
4516dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      VT.getVectorElementType() != V1.getValueType().getVectorElementType())
451736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines    return SDValue();
451836b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
4519dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  bool SplitV0 = V0.getValueType().getSizeInBits() == 128;
452036b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
4521dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!isConcatMask(Mask, VT, SplitV0))
4522dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
452336b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
4524dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT CastVT = EVT::getVectorVT(*DAG.getContext(), VT.getVectorElementType(),
4525dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                VT.getVectorNumElements() / 2);
4526dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (SplitV0) {
4527dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    V0 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, CastVT, V0,
4528dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                     DAG.getConstant(0, MVT::i64));
452972062f5744557e270a38192554c3126ea5f97434Tim Northover  }
4530dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (V1.getValueType().getSizeInBits() == 128) {
4531dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    V1 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, CastVT, V1,
4532dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                     DAG.getConstant(0, MVT::i64));
4533dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
4534dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return DAG.getNode(ISD::CONCAT_VECTORS, DL, VT, V0, V1);
453572062f5744557e270a38192554c3126ea5f97434Tim Northover}
453672062f5744557e270a38192554c3126ea5f97434Tim Northover
4537dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// GeneratePerfectShuffle - Given an entry in the perfect-shuffle table, emit
4538dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// the specified operations to build the shuffle.
4539dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue GeneratePerfectShuffle(unsigned PFEntry, SDValue LHS,
4540dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                      SDValue RHS, SelectionDAG &DAG,
4541dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                      SDLoc dl) {
4542dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned OpNum = (PFEntry >> 26) & 0x0F;
4543dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned LHSID = (PFEntry >> 13) & ((1 << 13) - 1);
4544dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned RHSID = (PFEntry >> 0) & ((1 << 13) - 1);
4545dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4546dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  enum {
4547dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    OP_COPY = 0, // Copy, used for things like <u,u,u,3> to say it is <0,1,2,3>
4548dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    OP_VREV,
4549dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    OP_VDUP0,
4550dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    OP_VDUP1,
4551dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    OP_VDUP2,
4552dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    OP_VDUP3,
4553dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    OP_VEXT1,
4554dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    OP_VEXT2,
4555dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    OP_VEXT3,
4556dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    OP_VUZPL, // VUZP, left result
4557dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    OP_VUZPR, // VUZP, right result
4558dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    OP_VZIPL, // VZIP, left result
4559dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    OP_VZIPR, // VZIP, right result
4560dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    OP_VTRNL, // VTRN, left result
4561dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    OP_VTRNR  // VTRN, right result
4562dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  };
4563dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4564dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (OpNum == OP_COPY) {
4565dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (LHSID == (1 * 9 + 2) * 9 + 3)
4566dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return LHS;
4567dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    assert(LHSID == ((4 * 9 + 5) * 9 + 6) * 9 + 7 && "Illegal OP_COPY!");
4568dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return RHS;
4569dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
4570e54885af9b54bfc7436a928a48d3db1ef88a2a70Stephen Lin
4571dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue OpLHS, OpRHS;
4572dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  OpLHS = GeneratePerfectShuffle(PerfectShuffleTable[LHSID], LHS, RHS, DAG, dl);
4573dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  OpRHS = GeneratePerfectShuffle(PerfectShuffleTable[RHSID], LHS, RHS, DAG, dl);
4574dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT = OpLHS.getValueType();
4575e54885af9b54bfc7436a928a48d3db1ef88a2a70Stephen Lin
4576dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  switch (OpNum) {
4577e54885af9b54bfc7436a928a48d3db1ef88a2a70Stephen Lin  default:
4578dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    llvm_unreachable("Unknown shuffle opcode!");
4579dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case OP_VREV:
4580dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // VREV divides the vector in half and swaps within the half.
4581dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (VT.getVectorElementType() == MVT::i32 ||
4582dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        VT.getVectorElementType() == MVT::f32)
4583dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return DAG.getNode(AArch64ISD::REV64, dl, VT, OpLHS);
4584dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // vrev <4 x i16> -> REV32
4585dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (VT.getVectorElementType() == MVT::i16)
4586dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return DAG.getNode(AArch64ISD::REV32, dl, VT, OpLHS);
4587dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // vrev <4 x i8> -> REV16
4588dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    assert(VT.getVectorElementType() == MVT::i8);
4589dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::REV16, dl, VT, OpLHS);
4590dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case OP_VDUP0:
4591dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case OP_VDUP1:
4592dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case OP_VDUP2:
4593dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case OP_VDUP3: {
4594dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    EVT EltTy = VT.getVectorElementType();
4595dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned Opcode;
4596dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (EltTy == MVT::i8)
4597dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Opcode = AArch64ISD::DUPLANE8;
4598dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    else if (EltTy == MVT::i16)
4599dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Opcode = AArch64ISD::DUPLANE16;
4600dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    else if (EltTy == MVT::i32 || EltTy == MVT::f32)
4601dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Opcode = AArch64ISD::DUPLANE32;
4602dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    else if (EltTy == MVT::i64 || EltTy == MVT::f64)
4603dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Opcode = AArch64ISD::DUPLANE64;
4604dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    else
4605dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      llvm_unreachable("Invalid vector element type?");
4606e54885af9b54bfc7436a928a48d3db1ef88a2a70Stephen Lin
4607dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (VT.getSizeInBits() == 64)
4608dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      OpLHS = WidenVector(OpLHS, DAG);
4609dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue Lane = DAG.getConstant(OpNum - OP_VDUP0, MVT::i64);
4610dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(Opcode, dl, VT, OpLHS, Lane);
4611dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
4612dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case OP_VEXT1:
4613dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case OP_VEXT2:
4614dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case OP_VEXT3: {
4615dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned Imm = (OpNum - OP_VEXT1 + 1) * getExtFactor(OpLHS);
4616dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::EXT, dl, VT, OpLHS, OpRHS,
4617dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                       DAG.getConstant(Imm, MVT::i32));
4618dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
4619dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case OP_VUZPL:
4620dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::UZP1, dl, DAG.getVTList(VT, VT), OpLHS,
4621dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                       OpRHS);
4622dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case OP_VUZPR:
4623dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::UZP2, dl, DAG.getVTList(VT, VT), OpLHS,
4624dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                       OpRHS);
4625dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case OP_VZIPL:
4626dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::ZIP1, dl, DAG.getVTList(VT, VT), OpLHS,
4627dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                       OpRHS);
4628dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case OP_VZIPR:
4629dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::ZIP2, dl, DAG.getVTList(VT, VT), OpLHS,
4630dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                       OpRHS);
4631dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case OP_VTRNL:
4632dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::TRN1, dl, DAG.getVTList(VT, VT), OpLHS,
4633dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                       OpRHS);
4634dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case OP_VTRNR:
4635dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::TRN2, dl, DAG.getVTList(VT, VT), OpLHS,
4636dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                       OpRHS);
4637dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
4638e54885af9b54bfc7436a928a48d3db1ef88a2a70Stephen Lin}
4639dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4640dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue GenerateTBL(SDValue Op, ArrayRef<int> ShuffleMask,
4641dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                           SelectionDAG &DAG) {
4642dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Check to see if we can use the TBL instruction.
4643dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue V1 = Op.getOperand(0);
4644dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue V2 = Op.getOperand(1);
464536b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines  SDLoc DL(Op);
464636b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
4647dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT EltVT = Op.getValueType().getVectorElementType();
4648dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned BytesPerElt = EltVT.getSizeInBits() / 8;
464936b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
4650dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SmallVector<SDValue, 8> TBLMask;
4651dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  for (int Val : ShuffleMask) {
4652dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    for (unsigned Byte = 0; Byte < BytesPerElt; ++Byte) {
4653dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      unsigned Offset = Byte + Val * BytesPerElt;
4654dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      TBLMask.push_back(DAG.getConstant(Offset, MVT::i32));
465536b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines    }
465636b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines  }
4657e54885af9b54bfc7436a928a48d3db1ef88a2a70Stephen Lin
4658dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  MVT IndexVT = MVT::v8i8;
4659dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned IndexLen = 8;
4660dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Op.getValueType().getSizeInBits() == 128) {
4661dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    IndexVT = MVT::v16i8;
4662dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    IndexLen = 16;
466336b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines  }
466436b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
4665dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue V1Cst = DAG.getNode(ISD::BITCAST, DL, IndexVT, V1);
4666dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue V2Cst = DAG.getNode(ISD::BITCAST, DL, IndexVT, V2);
4667dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4668dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Shuffle;
4669dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (V2.getNode()->getOpcode() == ISD::UNDEF) {
4670dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (IndexLen == 8)
4671dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      V1Cst = DAG.getNode(ISD::CONCAT_VECTORS, DL, MVT::v16i8, V1Cst, V1Cst);
4672dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Shuffle = DAG.getNode(
4673dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        ISD::INTRINSIC_WO_CHAIN, DL, IndexVT,
4674dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        DAG.getConstant(Intrinsic::aarch64_neon_tbl1, MVT::i32), V1Cst,
4675dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        DAG.getNode(ISD::BUILD_VECTOR, DL, IndexVT,
4676dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                    makeArrayRef(TBLMask.data(), IndexLen)));
4677dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  } else {
4678dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (IndexLen == 8) {
4679dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      V1Cst = DAG.getNode(ISD::CONCAT_VECTORS, DL, MVT::v16i8, V1Cst, V2Cst);
4680dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Shuffle = DAG.getNode(
4681dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          ISD::INTRINSIC_WO_CHAIN, DL, IndexVT,
4682dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          DAG.getConstant(Intrinsic::aarch64_neon_tbl1, MVT::i32), V1Cst,
4683dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          DAG.getNode(ISD::BUILD_VECTOR, DL, IndexVT,
4684dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                      makeArrayRef(TBLMask.data(), IndexLen)));
4685dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    } else {
4686dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // FIXME: We cannot, for the moment, emit a TBL2 instruction because we
4687dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // cannot currently represent the register constraints on the input
4688dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // table registers.
4689dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      //  Shuffle = DAG.getNode(AArch64ISD::TBL2, DL, IndexVT, V1Cst, V2Cst,
4690dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      //                   DAG.getNode(ISD::BUILD_VECTOR, DL, IndexVT,
4691dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      //                               &TBLMask[0], IndexLen));
4692dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Shuffle = DAG.getNode(
4693dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          ISD::INTRINSIC_WO_CHAIN, DL, IndexVT,
4694dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          DAG.getConstant(Intrinsic::aarch64_neon_tbl2, MVT::i32), V1Cst, V2Cst,
4695dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          DAG.getNode(ISD::BUILD_VECTOR, DL, IndexVT,
4696dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                      makeArrayRef(TBLMask.data(), IndexLen)));
469736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines    }
469836b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines  }
4699dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return DAG.getNode(ISD::BITCAST, DL, Op.getValueType(), Shuffle);
470036b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines}
470136b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
4702dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic unsigned getDUPLANEOp(EVT EltType) {
4703dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (EltType == MVT::i8)
4704dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return AArch64ISD::DUPLANE8;
4705dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (EltType == MVT::i16)
4706dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return AArch64ISD::DUPLANE16;
4707dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (EltType == MVT::i32 || EltType == MVT::f32)
4708dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return AArch64ISD::DUPLANE32;
4709dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (EltType == MVT::i64 || EltType == MVT::f64)
4710dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return AArch64ISD::DUPLANE64;
4711dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4712dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  llvm_unreachable("Invalid vector element type?");
471336b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines}
47148a0ff1f236e77214878c9d493e786b30656ad2a1Bill Wendling
4715dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::LowerVECTOR_SHUFFLE(SDValue Op,
4716dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                                   SelectionDAG &DAG) const {
4717dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc dl(Op);
471836b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines  EVT VT = Op.getValueType();
471936b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
4720dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  ShuffleVectorSDNode *SVN = cast<ShuffleVectorSDNode>(Op.getNode());
4721dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4722dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Convert shuffles that are directly supported on NEON to target-specific
4723dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // DAG nodes, instead of keeping them as shuffles and matching them again
4724dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // during code selection.  This is more efficient and avoids the possibility
4725dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // of inconsistencies between legalization and selection.
4726dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  ArrayRef<int> ShuffleMask = SVN->getMask();
472736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
4728dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue V1 = Op.getOperand(0);
4729dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue V2 = Op.getOperand(1);
4730dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4731dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (ShuffleVectorSDNode::isSplatMask(&ShuffleMask[0],
4732dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                       V1.getValueType().getSimpleVT())) {
4733dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    int Lane = SVN->getSplatIndex();
4734dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // If this is undef splat, generate it via "just" vdup, if possible.
4735dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (Lane == -1)
4736dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Lane = 0;
4737dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4738dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (Lane == 0 && V1.getOpcode() == ISD::SCALAR_TO_VECTOR)
4739dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return DAG.getNode(AArch64ISD::DUP, dl, V1.getValueType(),
4740dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                         V1.getOperand(0));
4741dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Test if V1 is a BUILD_VECTOR and the lane being referenced is a non-
4742dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // constant. If so, we can just reference the lane's definition directly.
4743dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (V1.getOpcode() == ISD::BUILD_VECTOR &&
4744dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        !isa<ConstantSDNode>(V1.getOperand(Lane)))
4745dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return DAG.getNode(AArch64ISD::DUP, dl, VT, V1.getOperand(Lane));
4746dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4747dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Otherwise, duplicate from the lane of the input vector.
4748dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned Opcode = getDUPLANEOp(V1.getValueType().getVectorElementType());
4749dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4750dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // SelectionDAGBuilder may have "helpfully" already extracted or conatenated
4751dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // to make a vector of the same size as this SHUFFLE. We can ignore the
4752dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // extract entirely, and canonicalise the concat using WidenVector.
4753dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (V1.getOpcode() == ISD::EXTRACT_SUBVECTOR) {
4754dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Lane += cast<ConstantSDNode>(V1.getOperand(1))->getZExtValue();
4755dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      V1 = V1.getOperand(0);
4756dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    } else if (V1.getOpcode() == ISD::CONCAT_VECTORS) {
4757dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      unsigned Idx = Lane >= (int)VT.getVectorNumElements() / 2;
4758dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Lane -= Idx * VT.getVectorNumElements() / 2;
4759dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      V1 = WidenVector(V1.getOperand(Idx), DAG);
4760dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    } else if (VT.getSizeInBits() == 64)
4761dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      V1 = WidenVector(V1, DAG);
4762dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4763dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(Opcode, dl, VT, V1, DAG.getConstant(Lane, MVT::i64));
4764dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
476536b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
4766dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (isREVMask(ShuffleMask, VT, 64))
4767dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::REV64, dl, V1.getValueType(), V1, V2);
4768dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (isREVMask(ShuffleMask, VT, 32))
4769dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::REV32, dl, V1.getValueType(), V1, V2);
4770dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (isREVMask(ShuffleMask, VT, 16))
4771dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::REV16, dl, V1.getValueType(), V1, V2);
4772dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4773dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  bool ReverseEXT = false;
4774dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned Imm;
4775dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (isEXTMask(ShuffleMask, VT, ReverseEXT, Imm)) {
4776dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (ReverseEXT)
4777dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      std::swap(V1, V2);
4778dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Imm *= getExtFactor(V1);
4779dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::EXT, dl, V1.getValueType(), V1, V2,
4780dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                       DAG.getConstant(Imm, MVT::i32));
4781dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  } else if (V2->getOpcode() == ISD::UNDEF &&
4782dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines             isSingletonEXTMask(ShuffleMask, VT, Imm)) {
4783dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Imm *= getExtFactor(V1);
4784dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::EXT, dl, V1.getValueType(), V1, V1,
4785dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                       DAG.getConstant(Imm, MVT::i32));
4786dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
478736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
4788dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned WhichResult;
4789dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (isZIPMask(ShuffleMask, VT, WhichResult)) {
4790dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned Opc = (WhichResult == 0) ? AArch64ISD::ZIP1 : AArch64ISD::ZIP2;
4791dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(Opc, dl, V1.getValueType(), V1, V2);
4792dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
4793dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (isUZPMask(ShuffleMask, VT, WhichResult)) {
4794dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned Opc = (WhichResult == 0) ? AArch64ISD::UZP1 : AArch64ISD::UZP2;
4795dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(Opc, dl, V1.getValueType(), V1, V2);
4796dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
4797dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (isTRNMask(ShuffleMask, VT, WhichResult)) {
4798dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned Opc = (WhichResult == 0) ? AArch64ISD::TRN1 : AArch64ISD::TRN2;
4799dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(Opc, dl, V1.getValueType(), V1, V2);
4800dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
4801dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4802dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (isZIP_v_undef_Mask(ShuffleMask, VT, WhichResult)) {
4803dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned Opc = (WhichResult == 0) ? AArch64ISD::ZIP1 : AArch64ISD::ZIP2;
4804dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(Opc, dl, V1.getValueType(), V1, V1);
4805dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
4806dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (isUZP_v_undef_Mask(ShuffleMask, VT, WhichResult)) {
4807dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned Opc = (WhichResult == 0) ? AArch64ISD::UZP1 : AArch64ISD::UZP2;
4808dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(Opc, dl, V1.getValueType(), V1, V1);
4809dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
4810dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (isTRN_v_undef_Mask(ShuffleMask, VT, WhichResult)) {
4811dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned Opc = (WhichResult == 0) ? AArch64ISD::TRN1 : AArch64ISD::TRN2;
4812dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(Opc, dl, V1.getValueType(), V1, V1);
4813dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
4814dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4815dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Concat = tryFormConcatFromShuffle(Op, DAG);
4816dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Concat.getNode())
4817dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return Concat;
4818dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4819dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  bool DstIsLeft;
4820dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  int Anomaly;
4821dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  int NumInputElements = V1.getValueType().getVectorNumElements();
4822dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (isINSMask(ShuffleMask, NumInputElements, DstIsLeft, Anomaly)) {
4823dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue DstVec = DstIsLeft ? V1 : V2;
4824dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue DstLaneV = DAG.getConstant(Anomaly, MVT::i64);
4825dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4826dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue SrcVec = V1;
4827dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    int SrcLane = ShuffleMask[Anomaly];
4828dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (SrcLane >= NumInputElements) {
4829dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      SrcVec = V2;
4830dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      SrcLane -= VT.getVectorNumElements();
4831dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
4832dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue SrcLaneV = DAG.getConstant(SrcLane, MVT::i64);
4833dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4834dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    EVT ScalarVT = VT.getVectorElementType();
4835dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (ScalarVT.getSizeInBits() < 32)
4836dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      ScalarVT = MVT::i32;
4837dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4838dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(
4839dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        ISD::INSERT_VECTOR_ELT, dl, VT, DstVec,
4840dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, ScalarVT, SrcVec, SrcLaneV),
4841dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        DstLaneV);
4842dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
4843dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4844dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // If the shuffle is not directly supported and it has 4 elements, use
4845dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // the PerfectShuffle-generated table to synthesize it from other shuffles.
4846dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned NumElts = VT.getVectorNumElements();
4847dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (NumElts == 4) {
4848dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned PFIndexes[4];
4849dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    for (unsigned i = 0; i != 4; ++i) {
4850dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (ShuffleMask[i] < 0)
4851dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        PFIndexes[i] = 8;
4852dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      else
4853dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        PFIndexes[i] = ShuffleMask[i];
4854dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
4855dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4856dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Compute the index in the perfect shuffle table.
4857dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned PFTableIndex = PFIndexes[0] * 9 * 9 * 9 + PFIndexes[1] * 9 * 9 +
4858dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                            PFIndexes[2] * 9 + PFIndexes[3];
4859dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned PFEntry = PerfectShuffleTable[PFTableIndex];
4860dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned Cost = (PFEntry >> 30);
4861dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4862dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (Cost <= 4)
4863dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return GeneratePerfectShuffle(PFEntry, V1, V2, DAG, dl);
4864dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
4865dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4866dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return GenerateTBL(Op, ShuffleMask, DAG);
486736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines}
48688a0ff1f236e77214878c9d493e786b30656ad2a1Bill Wendling
4869dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic bool resolveBuildVector(BuildVectorSDNode *BVN, APInt &CnstBits,
4870dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                               APInt &UndefBits) {
4871dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT = BVN->getValueType(0);
4872dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  APInt SplatBits, SplatUndef;
4873dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned SplatBitSize;
4874dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  bool HasAnyUndefs;
4875dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (BVN->isConstantSplat(SplatBits, SplatUndef, SplatBitSize, HasAnyUndefs)) {
4876dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned NumSplats = VT.getSizeInBits() / SplatBitSize;
4877dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4878dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    for (unsigned i = 0; i < NumSplats; ++i) {
4879dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      CnstBits <<= SplatBitSize;
4880dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      UndefBits <<= SplatBitSize;
4881dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      CnstBits |= SplatBits.zextOrTrunc(VT.getSizeInBits());
4882dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      UndefBits |= (SplatBits ^ SplatUndef).zextOrTrunc(VT.getSizeInBits());
4883dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
4884dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4885dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return true;
4886dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
4887dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4888dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return false;
4889dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
4890dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4891dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::LowerVectorAND(SDValue Op,
4892dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                              SelectionDAG &DAG) const {
4893dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  BuildVectorSDNode *BVN =
4894dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      dyn_cast<BuildVectorSDNode>(Op.getOperand(1).getNode());
4895dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue LHS = Op.getOperand(0);
489636b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines  SDLoc dl(Op);
4897dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT = Op.getValueType();
489836b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
4899dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!BVN)
4900dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return Op;
490136b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
4902dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  APInt CnstBits(VT.getSizeInBits(), 0);
4903dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  APInt UndefBits(VT.getSizeInBits(), 0);
4904dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (resolveBuildVector(BVN, CnstBits, UndefBits)) {
4905dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // We only have BIC vector immediate instruction, which is and-not.
4906dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    CnstBits = ~CnstBits;
4907dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4908dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // We make use of a little bit of goto ickiness in order to avoid having to
4909dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // duplicate the immediate matching logic for the undef toggled case.
4910dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    bool SecondTry = false;
4911dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  AttemptModImm:
4912dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4913dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (CnstBits.getHiBits(64) == CnstBits.getLoBits(64)) {
4914dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      CnstBits = CnstBits.zextOrTrunc(64);
4915dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      uint64_t CnstVal = CnstBits.getZExtValue();
4916dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4917dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (AArch64_AM::isAdvSIMDModImmType1(CnstVal)) {
4918dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        CnstVal = AArch64_AM::encodeAdvSIMDModImmType1(CnstVal);
4919dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        MVT MovTy = (VT.getSizeInBits() == 128) ? MVT::v4i32 : MVT::v2i32;
4920dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue Mov = DAG.getNode(AArch64ISD::BICi, dl, MovTy, LHS,
4921dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(CnstVal, MVT::i32),
4922dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(0, MVT::i32));
4923dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(ISD::BITCAST, dl, VT, Mov);
4924dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
492536b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
4926dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (AArch64_AM::isAdvSIMDModImmType2(CnstVal)) {
4927dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        CnstVal = AArch64_AM::encodeAdvSIMDModImmType2(CnstVal);
4928dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        MVT MovTy = (VT.getSizeInBits() == 128) ? MVT::v4i32 : MVT::v2i32;
4929dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue Mov = DAG.getNode(AArch64ISD::BICi, dl, MovTy, LHS,
4930dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(CnstVal, MVT::i32),
4931dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(8, MVT::i32));
4932dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(ISD::BITCAST, dl, VT, Mov);
4933dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
493436b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
4935dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (AArch64_AM::isAdvSIMDModImmType3(CnstVal)) {
4936dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        CnstVal = AArch64_AM::encodeAdvSIMDModImmType3(CnstVal);
4937dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        MVT MovTy = (VT.getSizeInBits() == 128) ? MVT::v4i32 : MVT::v2i32;
4938dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue Mov = DAG.getNode(AArch64ISD::BICi, dl, MovTy, LHS,
4939dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(CnstVal, MVT::i32),
4940dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(16, MVT::i32));
4941dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(ISD::BITCAST, dl, VT, Mov);
4942dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
4943dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4944dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (AArch64_AM::isAdvSIMDModImmType4(CnstVal)) {
4945dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        CnstVal = AArch64_AM::encodeAdvSIMDModImmType4(CnstVal);
4946dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        MVT MovTy = (VT.getSizeInBits() == 128) ? MVT::v4i32 : MVT::v2i32;
4947dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue Mov = DAG.getNode(AArch64ISD::BICi, dl, MovTy, LHS,
4948dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(CnstVal, MVT::i32),
4949dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(24, MVT::i32));
4950dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(ISD::BITCAST, dl, VT, Mov);
4951dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
4952dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4953dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (AArch64_AM::isAdvSIMDModImmType5(CnstVal)) {
4954dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        CnstVal = AArch64_AM::encodeAdvSIMDModImmType5(CnstVal);
4955dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        MVT MovTy = (VT.getSizeInBits() == 128) ? MVT::v8i16 : MVT::v4i16;
4956dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue Mov = DAG.getNode(AArch64ISD::BICi, dl, MovTy, LHS,
4957dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(CnstVal, MVT::i32),
4958dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(0, MVT::i32));
4959dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(ISD::BITCAST, dl, VT, Mov);
4960dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
4961dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4962dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (AArch64_AM::isAdvSIMDModImmType6(CnstVal)) {
4963dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        CnstVal = AArch64_AM::encodeAdvSIMDModImmType6(CnstVal);
4964dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        MVT MovTy = (VT.getSizeInBits() == 128) ? MVT::v8i16 : MVT::v4i16;
4965dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue Mov = DAG.getNode(AArch64ISD::BICi, dl, MovTy, LHS,
4966dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(CnstVal, MVT::i32),
4967dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(8, MVT::i32));
4968dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(ISD::BITCAST, dl, VT, Mov);
4969dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
4970dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
4971dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4972dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (SecondTry)
4973dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      goto FailedModImm;
4974dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SecondTry = true;
4975dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    CnstBits = ~UndefBits;
4976dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    goto AttemptModImm;
4977dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
4978dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
4979dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// We can always fall back to a non-immediate AND.
4980dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesFailedModImm:
4981dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return Op;
49828a0ff1f236e77214878c9d493e786b30656ad2a1Bill Wendling}
49838a0ff1f236e77214878c9d493e786b30656ad2a1Bill Wendling
4984dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// Specialized code to quickly find if PotentialBVec is a BuildVector that
4985dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// consists of only the same constant int value, returned in reference arg
4986dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// ConstVal
4987dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic bool isAllConstantBuildVector(const SDValue &PotentialBVec,
4988dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                     uint64_t &ConstVal) {
4989dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  BuildVectorSDNode *Bvec = dyn_cast<BuildVectorSDNode>(PotentialBVec);
4990dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!Bvec)
4991dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return false;
4992dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  ConstantSDNode *FirstElt = dyn_cast<ConstantSDNode>(Bvec->getOperand(0));
4993dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!FirstElt)
4994dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return false;
4995dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT = Bvec->getValueType(0);
4996dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned NumElts = VT.getVectorNumElements();
4997dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  for (unsigned i = 1; i < NumElts; ++i)
4998dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (dyn_cast<ConstantSDNode>(Bvec->getOperand(i)) != FirstElt)
4999dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return false;
5000dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  ConstVal = FirstElt->getZExtValue();
5001dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return true;
5002dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
500387773c318fcee853fb34a80a10c4347d523bdafbTim Northover
5004dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic unsigned getIntrinsicID(const SDNode *N) {
5005dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned Opcode = N->getOpcode();
5006dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  switch (Opcode) {
5007dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  default:
5008dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return Intrinsic::not_intrinsic;
5009dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::INTRINSIC_WO_CHAIN: {
5010dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned IID = cast<ConstantSDNode>(N->getOperand(0))->getZExtValue();
5011dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (IID < Intrinsic::num_intrinsics)
5012dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return IID;
5013dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return Intrinsic::not_intrinsic;
5014dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
5015dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
5016dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
5017dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5018dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// Attempt to form a vector S[LR]I from (or (and X, BvecC1), (lsl Y, C2)),
5019dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// to (SLI X, Y, C2), where X and Y have matching vector types, BvecC1 is a
5020dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// BUILD_VECTORs with constant element C1, C2 is a constant, and C1 == ~C2.
5021dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// Also, logical shift right -> sri, with the same structure.
5022dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue tryLowerToSLI(SDNode *N, SelectionDAG &DAG) {
5023dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT = N->getValueType(0);
5024dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5025dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!VT.isVector())
5026dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
5027dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5028dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc DL(N);
5029dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5030dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Is the first op an AND?
5031dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  const SDValue And = N->getOperand(0);
5032dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (And.getOpcode() != ISD::AND)
5033dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
5034dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5035dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Is the second op an shl or lshr?
5036dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Shift = N->getOperand(1);
5037dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // This will have been turned into: AArch64ISD::VSHL vector, #shift
5038dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // or AArch64ISD::VLSHR vector, #shift
5039dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned ShiftOpc = Shift.getOpcode();
5040dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if ((ShiftOpc != AArch64ISD::VSHL && ShiftOpc != AArch64ISD::VLSHR))
5041dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
5042dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  bool IsShiftRight = ShiftOpc == AArch64ISD::VLSHR;
5043dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5044dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Is the shift amount constant?
5045dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  ConstantSDNode *C2node = dyn_cast<ConstantSDNode>(Shift.getOperand(1));
5046dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!C2node)
5047dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
5048dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5049dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Is the and mask vector all constant?
5050dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  uint64_t C1;
5051dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!isAllConstantBuildVector(And.getOperand(1), C1))
5052dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
5053dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5054dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Is C1 == ~C2, taking into account how much one can shift elements of a
5055dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // particular size?
5056dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  uint64_t C2 = C2node->getZExtValue();
5057dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned ElemSizeInBits = VT.getVectorElementType().getSizeInBits();
5058dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (C2 > ElemSizeInBits)
5059dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
5060dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned ElemMask = (1 << ElemSizeInBits) - 1;
5061dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if ((C1 & ElemMask) != (~C2 & ElemMask))
5062dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
5063dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5064dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue X = And.getOperand(0);
5065dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Y = Shift.getOperand(0);
5066dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5067dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned Intrin =
5068dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      IsShiftRight ? Intrinsic::aarch64_neon_vsri : Intrinsic::aarch64_neon_vsli;
5069dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue ResultSLI =
5070dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
5071dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                  DAG.getConstant(Intrin, MVT::i32), X, Y, Shift.getOperand(1));
5072dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5073dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  DEBUG(dbgs() << "aarch64-lower: transformed: \n");
5074dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  DEBUG(N->dump(&DAG));
5075dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  DEBUG(dbgs() << "into: \n");
5076dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  DEBUG(ResultSLI->dump(&DAG));
5077dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5078dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  ++NumShiftInserts;
5079dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return ResultSLI;
5080dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
5081dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5082dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::LowerVectorOR(SDValue Op,
5083dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                             SelectionDAG &DAG) const {
5084dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Attempt to form a vector S[LR]I from (or (and X, C1), (lsl Y, C2))
5085dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (EnableAArch64SlrGeneration) {
5086dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue Res = tryLowerToSLI(Op.getNode(), DAG);
5087dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (Res.getNode())
5088dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return Res;
5089dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
5090dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5091dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  BuildVectorSDNode *BVN =
5092dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      dyn_cast<BuildVectorSDNode>(Op.getOperand(0).getNode());
5093dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue LHS = Op.getOperand(1);
5094dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc dl(Op);
509587773c318fcee853fb34a80a10c4347d523bdafbTim Northover  EVT VT = Op.getValueType();
509687773c318fcee853fb34a80a10c4347d523bdafbTim Northover
5097dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // OR commutes, so try swapping the operands.
5098dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!BVN) {
5099dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    LHS = Op.getOperand(0);
5100dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    BVN = dyn_cast<BuildVectorSDNode>(Op.getOperand(1).getNode());
5101dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
5102dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!BVN)
5103dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return Op;
510487773c318fcee853fb34a80a10c4347d523bdafbTim Northover
5105dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  APInt CnstBits(VT.getSizeInBits(), 0);
5106dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  APInt UndefBits(VT.getSizeInBits(), 0);
5107dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (resolveBuildVector(BVN, CnstBits, UndefBits)) {
5108dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // We make use of a little bit of goto ickiness in order to avoid having to
5109dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // duplicate the immediate matching logic for the undef toggled case.
5110dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    bool SecondTry = false;
5111dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  AttemptModImm:
5112dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5113dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (CnstBits.getHiBits(64) == CnstBits.getLoBits(64)) {
5114dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      CnstBits = CnstBits.zextOrTrunc(64);
5115dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      uint64_t CnstVal = CnstBits.getZExtValue();
5116dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5117dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (AArch64_AM::isAdvSIMDModImmType1(CnstVal)) {
5118dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        CnstVal = AArch64_AM::encodeAdvSIMDModImmType1(CnstVal);
5119dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        MVT MovTy = (VT.getSizeInBits() == 128) ? MVT::v4i32 : MVT::v2i32;
5120dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue Mov = DAG.getNode(AArch64ISD::ORRi, dl, MovTy, LHS,
5121dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(CnstVal, MVT::i32),
5122dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(0, MVT::i32));
5123dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(ISD::BITCAST, dl, VT, Mov);
512487773c318fcee853fb34a80a10c4347d523bdafbTim Northover      }
512587773c318fcee853fb34a80a10c4347d523bdafbTim Northover
5126dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (AArch64_AM::isAdvSIMDModImmType2(CnstVal)) {
5127dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        CnstVal = AArch64_AM::encodeAdvSIMDModImmType2(CnstVal);
5128dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        MVT MovTy = (VT.getSizeInBits() == 128) ? MVT::v4i32 : MVT::v2i32;
5129dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue Mov = DAG.getNode(AArch64ISD::ORRi, dl, MovTy, LHS,
5130dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(CnstVal, MVT::i32),
5131dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(8, MVT::i32));
5132dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(ISD::BITCAST, dl, VT, Mov);
513387773c318fcee853fb34a80a10c4347d523bdafbTim Northover      }
513487773c318fcee853fb34a80a10c4347d523bdafbTim Northover
5135dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (AArch64_AM::isAdvSIMDModImmType3(CnstVal)) {
5136dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        CnstVal = AArch64_AM::encodeAdvSIMDModImmType3(CnstVal);
5137dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        MVT MovTy = (VT.getSizeInBits() == 128) ? MVT::v4i32 : MVT::v2i32;
5138dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue Mov = DAG.getNode(AArch64ISD::ORRi, dl, MovTy, LHS,
5139dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(CnstVal, MVT::i32),
5140dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(16, MVT::i32));
5141dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(ISD::BITCAST, dl, VT, Mov);
5142dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
5143dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5144dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (AArch64_AM::isAdvSIMDModImmType4(CnstVal)) {
5145dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        CnstVal = AArch64_AM::encodeAdvSIMDModImmType4(CnstVal);
5146dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        MVT MovTy = (VT.getSizeInBits() == 128) ? MVT::v4i32 : MVT::v2i32;
5147dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue Mov = DAG.getNode(AArch64ISD::ORRi, dl, MovTy, LHS,
5148dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(CnstVal, MVT::i32),
5149dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(24, MVT::i32));
5150dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(ISD::BITCAST, dl, VT, Mov);
5151dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
5152dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5153dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (AArch64_AM::isAdvSIMDModImmType5(CnstVal)) {
5154dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        CnstVal = AArch64_AM::encodeAdvSIMDModImmType5(CnstVal);
5155dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        MVT MovTy = (VT.getSizeInBits() == 128) ? MVT::v8i16 : MVT::v4i16;
5156dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue Mov = DAG.getNode(AArch64ISD::ORRi, dl, MovTy, LHS,
5157dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(CnstVal, MVT::i32),
5158dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(0, MVT::i32));
5159dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(ISD::BITCAST, dl, VT, Mov);
5160dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
5161dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5162dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (AArch64_AM::isAdvSIMDModImmType6(CnstVal)) {
5163dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        CnstVal = AArch64_AM::encodeAdvSIMDModImmType6(CnstVal);
5164dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        MVT MovTy = (VT.getSizeInBits() == 128) ? MVT::v8i16 : MVT::v4i16;
5165dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue Mov = DAG.getNode(AArch64ISD::ORRi, dl, MovTy, LHS,
5166dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(CnstVal, MVT::i32),
5167dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(8, MVT::i32));
5168dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(ISD::BITCAST, dl, VT, Mov);
516987773c318fcee853fb34a80a10c4347d523bdafbTim Northover      }
517087773c318fcee853fb34a80a10c4347d523bdafbTim Northover    }
5171dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5172dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (SecondTry)
5173dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      goto FailedModImm;
5174dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SecondTry = true;
5175dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    CnstBits = UndefBits;
5176dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    goto AttemptModImm;
517787773c318fcee853fb34a80a10c4347d523bdafbTim Northover  }
5178767f816b926376bd850a62a28d35343ad0559c91Kevin Qin
5179dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// We can always fall back to a non-immediate OR.
5180dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesFailedModImm:
5181dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return Op;
5182dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
5183dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5184cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines// Normalize the operands of BUILD_VECTOR. The value of constant operands will
5185cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines// be truncated to fit element width.
5186cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hinesstatic SDValue NormalizeBuildVector(SDValue Op,
5187cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines                                    SelectionDAG &DAG) {
5188cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines  assert(Op.getOpcode() == ISD::BUILD_VECTOR && "Unknown opcode!");
5189cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines  SDLoc dl(Op);
5190cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines  EVT VT = Op.getValueType();
5191cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines  EVT EltTy= VT.getVectorElementType();
5192cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines
5193cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines  if (EltTy.isFloatingPoint() || EltTy.getSizeInBits() > 16)
5194cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines    return Op;
5195cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines
5196cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines  SmallVector<SDValue, 16> Ops;
5197cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines  for (unsigned I = 0, E = VT.getVectorNumElements(); I != E; ++I) {
5198cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines    SDValue Lane = Op.getOperand(I);
5199cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines    if (Lane.getOpcode() == ISD::Constant) {
5200cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      APInt LowBits(EltTy.getSizeInBits(),
5201cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines                    cast<ConstantSDNode>(Lane)->getZExtValue());
5202cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      Lane = DAG.getConstant(LowBits.getZExtValue(), MVT::i32);
5203cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines    }
5204cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines    Ops.push_back(Lane);
5205cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines  }
5206cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines  return DAG.getNode(ISD::BUILD_VECTOR, dl, VT, Ops);
5207cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines}
5208cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines
5209dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::LowerBUILD_VECTOR(SDValue Op,
5210dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                                 SelectionDAG &DAG) const {
5211dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc dl(Op);
5212dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT = Op.getValueType();
5213cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines  Op = NormalizeBuildVector(Op, DAG);
5214cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines  BuildVectorSDNode *BVN = cast<BuildVectorSDNode>(Op.getNode());
5215dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5216dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  APInt CnstBits(VT.getSizeInBits(), 0);
5217dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  APInt UndefBits(VT.getSizeInBits(), 0);
5218dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (resolveBuildVector(BVN, CnstBits, UndefBits)) {
5219dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // We make use of a little bit of goto ickiness in order to avoid having to
5220dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // duplicate the immediate matching logic for the undef toggled case.
5221dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    bool SecondTry = false;
5222dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  AttemptModImm:
5223dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5224dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (CnstBits.getHiBits(64) == CnstBits.getLoBits(64)) {
5225dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      CnstBits = CnstBits.zextOrTrunc(64);
5226dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      uint64_t CnstVal = CnstBits.getZExtValue();
5227dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5228dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // Certain magic vector constants (used to express things like NOT
5229dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // and NEG) are passed through unmodified.  This allows codegen patterns
5230dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // for these operations to match.  Special-purpose patterns will lower
5231dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // these immediates to MOVIs if it proves necessary.
5232dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (VT.isInteger() && (CnstVal == 0 || CnstVal == ~0ULL))
5233dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return Op;
5234dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5235dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // The many faces of MOVI...
5236dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (AArch64_AM::isAdvSIMDModImmType10(CnstVal)) {
5237dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        CnstVal = AArch64_AM::encodeAdvSIMDModImmType10(CnstVal);
5238dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        if (VT.getSizeInBits() == 128) {
5239dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          SDValue Mov = DAG.getNode(AArch64ISD::MOVIedit, dl, MVT::v2i64,
5240dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                    DAG.getConstant(CnstVal, MVT::i32));
5241dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          return DAG.getNode(ISD::BITCAST, dl, VT, Mov);
5242dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        }
5243dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5244dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // Support the V64 version via subregister insertion.
5245dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue Mov = DAG.getNode(AArch64ISD::MOVIedit, dl, MVT::f64,
5246dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(CnstVal, MVT::i32));
5247dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(ISD::BITCAST, dl, VT, Mov);
5248dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
5249dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5250dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (AArch64_AM::isAdvSIMDModImmType1(CnstVal)) {
5251dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        CnstVal = AArch64_AM::encodeAdvSIMDModImmType1(CnstVal);
5252dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        MVT MovTy = (VT.getSizeInBits() == 128) ? MVT::v4i32 : MVT::v2i32;
5253dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue Mov = DAG.getNode(AArch64ISD::MOVIshift, dl, MovTy,
5254dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(CnstVal, MVT::i32),
5255dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(0, MVT::i32));
5256dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(ISD::BITCAST, dl, VT, Mov);
5257dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
5258dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5259dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (AArch64_AM::isAdvSIMDModImmType2(CnstVal)) {
5260dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        CnstVal = AArch64_AM::encodeAdvSIMDModImmType2(CnstVal);
5261dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        MVT MovTy = (VT.getSizeInBits() == 128) ? MVT::v4i32 : MVT::v2i32;
5262dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue Mov = DAG.getNode(AArch64ISD::MOVIshift, dl, MovTy,
5263dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(CnstVal, MVT::i32),
5264dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(8, MVT::i32));
5265dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(ISD::BITCAST, dl, VT, Mov);
5266dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
5267dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5268dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (AArch64_AM::isAdvSIMDModImmType3(CnstVal)) {
5269dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        CnstVal = AArch64_AM::encodeAdvSIMDModImmType3(CnstVal);
5270dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        MVT MovTy = (VT.getSizeInBits() == 128) ? MVT::v4i32 : MVT::v2i32;
5271dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue Mov = DAG.getNode(AArch64ISD::MOVIshift, dl, MovTy,
5272dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(CnstVal, MVT::i32),
5273dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(16, MVT::i32));
5274dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(ISD::BITCAST, dl, VT, Mov);
5275dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
5276dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5277dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (AArch64_AM::isAdvSIMDModImmType4(CnstVal)) {
5278dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        CnstVal = AArch64_AM::encodeAdvSIMDModImmType4(CnstVal);
5279dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        MVT MovTy = (VT.getSizeInBits() == 128) ? MVT::v4i32 : MVT::v2i32;
5280dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue Mov = DAG.getNode(AArch64ISD::MOVIshift, dl, MovTy,
5281dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(CnstVal, MVT::i32),
5282dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(24, MVT::i32));
5283dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(ISD::BITCAST, dl, VT, Mov);
5284dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
5285dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5286dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (AArch64_AM::isAdvSIMDModImmType5(CnstVal)) {
5287dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        CnstVal = AArch64_AM::encodeAdvSIMDModImmType5(CnstVal);
5288dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        MVT MovTy = (VT.getSizeInBits() == 128) ? MVT::v8i16 : MVT::v4i16;
5289dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue Mov = DAG.getNode(AArch64ISD::MOVIshift, dl, MovTy,
5290dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(CnstVal, MVT::i32),
5291dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(0, MVT::i32));
5292dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(ISD::BITCAST, dl, VT, Mov);
5293dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
5294dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5295dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (AArch64_AM::isAdvSIMDModImmType6(CnstVal)) {
5296dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        CnstVal = AArch64_AM::encodeAdvSIMDModImmType6(CnstVal);
5297dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        MVT MovTy = (VT.getSizeInBits() == 128) ? MVT::v8i16 : MVT::v4i16;
5298dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue Mov = DAG.getNode(AArch64ISD::MOVIshift, dl, MovTy,
5299dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(CnstVal, MVT::i32),
5300dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(8, MVT::i32));
5301dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(ISD::BITCAST, dl, VT, Mov);
5302dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
5303dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5304dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (AArch64_AM::isAdvSIMDModImmType7(CnstVal)) {
5305dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        CnstVal = AArch64_AM::encodeAdvSIMDModImmType7(CnstVal);
5306dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        MVT MovTy = (VT.getSizeInBits() == 128) ? MVT::v4i32 : MVT::v2i32;
5307dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue Mov = DAG.getNode(AArch64ISD::MOVImsl, dl, MovTy,
5308dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(CnstVal, MVT::i32),
5309dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(264, MVT::i32));
5310dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(ISD::BITCAST, dl, VT, Mov);
5311dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
5312dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5313dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (AArch64_AM::isAdvSIMDModImmType8(CnstVal)) {
5314dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        CnstVal = AArch64_AM::encodeAdvSIMDModImmType8(CnstVal);
5315dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        MVT MovTy = (VT.getSizeInBits() == 128) ? MVT::v4i32 : MVT::v2i32;
5316dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue Mov = DAG.getNode(AArch64ISD::MOVImsl, dl, MovTy,
5317dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(CnstVal, MVT::i32),
5318dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(272, MVT::i32));
5319dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(ISD::BITCAST, dl, VT, Mov);
5320dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
5321dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5322dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (AArch64_AM::isAdvSIMDModImmType9(CnstVal)) {
5323dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        CnstVal = AArch64_AM::encodeAdvSIMDModImmType9(CnstVal);
5324dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        MVT MovTy = (VT.getSizeInBits() == 128) ? MVT::v16i8 : MVT::v8i8;
5325dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue Mov = DAG.getNode(AArch64ISD::MOVI, dl, MovTy,
5326dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(CnstVal, MVT::i32));
5327dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(ISD::BITCAST, dl, VT, Mov);
5328dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
5329dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5330dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // The few faces of FMOV...
5331dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (AArch64_AM::isAdvSIMDModImmType11(CnstVal)) {
5332dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        CnstVal = AArch64_AM::encodeAdvSIMDModImmType11(CnstVal);
5333dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        MVT MovTy = (VT.getSizeInBits() == 128) ? MVT::v4f32 : MVT::v2f32;
5334dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue Mov = DAG.getNode(AArch64ISD::FMOV, dl, MovTy,
5335dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(CnstVal, MVT::i32));
5336dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(ISD::BITCAST, dl, VT, Mov);
5337dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
5338dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5339dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (AArch64_AM::isAdvSIMDModImmType12(CnstVal) &&
5340dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          VT.getSizeInBits() == 128) {
5341dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        CnstVal = AArch64_AM::encodeAdvSIMDModImmType12(CnstVal);
5342dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue Mov = DAG.getNode(AArch64ISD::FMOV, dl, MVT::v2f64,
5343dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(CnstVal, MVT::i32));
5344dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(ISD::BITCAST, dl, VT, Mov);
5345dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
5346dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5347dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // The many faces of MVNI...
5348dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      CnstVal = ~CnstVal;
5349dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (AArch64_AM::isAdvSIMDModImmType1(CnstVal)) {
5350dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        CnstVal = AArch64_AM::encodeAdvSIMDModImmType1(CnstVal);
5351dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        MVT MovTy = (VT.getSizeInBits() == 128) ? MVT::v4i32 : MVT::v2i32;
5352dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue Mov = DAG.getNode(AArch64ISD::MVNIshift, dl, MovTy,
5353dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(CnstVal, MVT::i32),
5354dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(0, MVT::i32));
5355dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(ISD::BITCAST, dl, VT, Mov);
5356dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
5357dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5358dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (AArch64_AM::isAdvSIMDModImmType2(CnstVal)) {
5359dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        CnstVal = AArch64_AM::encodeAdvSIMDModImmType2(CnstVal);
5360dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        MVT MovTy = (VT.getSizeInBits() == 128) ? MVT::v4i32 : MVT::v2i32;
5361dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue Mov = DAG.getNode(AArch64ISD::MVNIshift, dl, MovTy,
5362dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(CnstVal, MVT::i32),
5363dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(8, MVT::i32));
5364dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(ISD::BITCAST, dl, VT, Mov);
5365dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
5366dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5367dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (AArch64_AM::isAdvSIMDModImmType3(CnstVal)) {
5368dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        CnstVal = AArch64_AM::encodeAdvSIMDModImmType3(CnstVal);
5369dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        MVT MovTy = (VT.getSizeInBits() == 128) ? MVT::v4i32 : MVT::v2i32;
5370dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue Mov = DAG.getNode(AArch64ISD::MVNIshift, dl, MovTy,
5371dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(CnstVal, MVT::i32),
5372dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(16, MVT::i32));
5373dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(ISD::BITCAST, dl, VT, Mov);
5374dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
5375dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5376dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (AArch64_AM::isAdvSIMDModImmType4(CnstVal)) {
5377dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        CnstVal = AArch64_AM::encodeAdvSIMDModImmType4(CnstVal);
5378dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        MVT MovTy = (VT.getSizeInBits() == 128) ? MVT::v4i32 : MVT::v2i32;
5379dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue Mov = DAG.getNode(AArch64ISD::MVNIshift, dl, MovTy,
5380dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(CnstVal, MVT::i32),
5381dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(24, MVT::i32));
5382dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(ISD::BITCAST, dl, VT, Mov);
5383dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
5384dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5385dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (AArch64_AM::isAdvSIMDModImmType5(CnstVal)) {
5386dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        CnstVal = AArch64_AM::encodeAdvSIMDModImmType5(CnstVal);
5387dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        MVT MovTy = (VT.getSizeInBits() == 128) ? MVT::v8i16 : MVT::v4i16;
5388dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue Mov = DAG.getNode(AArch64ISD::MVNIshift, dl, MovTy,
5389dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(CnstVal, MVT::i32),
5390dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(0, MVT::i32));
5391dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(ISD::BITCAST, dl, VT, Mov);
5392dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
5393dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5394dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (AArch64_AM::isAdvSIMDModImmType6(CnstVal)) {
5395dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        CnstVal = AArch64_AM::encodeAdvSIMDModImmType6(CnstVal);
5396dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        MVT MovTy = (VT.getSizeInBits() == 128) ? MVT::v8i16 : MVT::v4i16;
5397dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue Mov = DAG.getNode(AArch64ISD::MVNIshift, dl, MovTy,
5398dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(CnstVal, MVT::i32),
5399dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(8, MVT::i32));
5400dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(ISD::BITCAST, dl, VT, Mov);
5401dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
5402dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5403dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (AArch64_AM::isAdvSIMDModImmType7(CnstVal)) {
5404dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        CnstVal = AArch64_AM::encodeAdvSIMDModImmType7(CnstVal);
5405dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        MVT MovTy = (VT.getSizeInBits() == 128) ? MVT::v4i32 : MVT::v2i32;
5406dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue Mov = DAG.getNode(AArch64ISD::MVNImsl, dl, MovTy,
5407dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(CnstVal, MVT::i32),
5408dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(264, MVT::i32));
5409dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(ISD::BITCAST, dl, VT, Mov);
5410dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
5411dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5412dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (AArch64_AM::isAdvSIMDModImmType8(CnstVal)) {
5413dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        CnstVal = AArch64_AM::encodeAdvSIMDModImmType8(CnstVal);
5414dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        MVT MovTy = (VT.getSizeInBits() == 128) ? MVT::v4i32 : MVT::v2i32;
5415dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue Mov = DAG.getNode(AArch64ISD::MVNImsl, dl, MovTy,
5416dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(CnstVal, MVT::i32),
5417dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(272, MVT::i32));
5418dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(ISD::BITCAST, dl, VT, Mov);
5419dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
5420dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
5421dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5422dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (SecondTry)
5423dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      goto FailedModImm;
5424dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SecondTry = true;
5425dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    CnstBits = UndefBits;
5426dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    goto AttemptModImm;
5427dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
5428dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesFailedModImm:
5429dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5430dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Scan through the operands to find some interesting properties we can
5431dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // exploit:
5432dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //   1) If only one value is used, we can use a DUP, or
5433dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //   2) if only the low element is not undef, we can just insert that, or
5434dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //   3) if only one constant value is used (w/ some non-constant lanes),
5435dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //      we can splat the constant value into the whole vector then fill
5436dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //      in the non-constant lanes.
5437dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //   4) FIXME: If different constant values are used, but we can intelligently
5438dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //             select the values we'll be overwriting for the non-constant
5439dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //             lanes such that we can directly materialize the vector
5440dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //             some other way (MOVI, e.g.), we can be sneaky.
5441767f816b926376bd850a62a28d35343ad0559c91Kevin Qin  unsigned NumElts = VT.getVectorNumElements();
5442767f816b926376bd850a62a28d35343ad0559c91Kevin Qin  bool isOnlyLowElement = true;
5443767f816b926376bd850a62a28d35343ad0559c91Kevin Qin  bool usesOnlyOneValue = true;
5444dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  bool usesOnlyOneConstantValue = true;
5445767f816b926376bd850a62a28d35343ad0559c91Kevin Qin  bool isConstant = true;
5446dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned NumConstantLanes = 0;
5447767f816b926376bd850a62a28d35343ad0559c91Kevin Qin  SDValue Value;
5448dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue ConstantValue;
5449767f816b926376bd850a62a28d35343ad0559c91Kevin Qin  for (unsigned i = 0; i < NumElts; ++i) {
5450767f816b926376bd850a62a28d35343ad0559c91Kevin Qin    SDValue V = Op.getOperand(i);
5451767f816b926376bd850a62a28d35343ad0559c91Kevin Qin    if (V.getOpcode() == ISD::UNDEF)
5452767f816b926376bd850a62a28d35343ad0559c91Kevin Qin      continue;
5453767f816b926376bd850a62a28d35343ad0559c91Kevin Qin    if (i > 0)
5454767f816b926376bd850a62a28d35343ad0559c91Kevin Qin      isOnlyLowElement = false;
5455767f816b926376bd850a62a28d35343ad0559c91Kevin Qin    if (!isa<ConstantFPSDNode>(V) && !isa<ConstantSDNode>(V))
5456767f816b926376bd850a62a28d35343ad0559c91Kevin Qin      isConstant = false;
5457767f816b926376bd850a62a28d35343ad0559c91Kevin Qin
5458dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (isa<ConstantSDNode>(V) || isa<ConstantFPSDNode>(V)) {
5459dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      ++NumConstantLanes;
5460dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (!ConstantValue.getNode())
5461dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        ConstantValue = V;
5462dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      else if (ConstantValue != V)
5463dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        usesOnlyOneConstantValue = false;
5464dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
5465767f816b926376bd850a62a28d35343ad0559c91Kevin Qin
5466dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (!Value.getNode())
5467767f816b926376bd850a62a28d35343ad0559c91Kevin Qin      Value = V;
5468dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    else if (V != Value)
5469dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      usesOnlyOneValue = false;
5470767f816b926376bd850a62a28d35343ad0559c91Kevin Qin  }
5471767f816b926376bd850a62a28d35343ad0559c91Kevin Qin
5472dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!Value.getNode())
5473767f816b926376bd850a62a28d35343ad0559c91Kevin Qin    return DAG.getUNDEF(VT);
5474767f816b926376bd850a62a28d35343ad0559c91Kevin Qin
547536b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines  if (isOnlyLowElement)
5476dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Value);
5477767f816b926376bd850a62a28d35343ad0559c91Kevin Qin
5478dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Use DUP for non-constant splats.  For f32 constant splats, reduce to
5479dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // i32 and try again.
5480dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (usesOnlyOneValue) {
5481767f816b926376bd850a62a28d35343ad0559c91Kevin Qin    if (!isConstant) {
5482dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (Value.getOpcode() != ISD::EXTRACT_VECTOR_ELT ||
5483dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          Value.getValueType() != VT)
5484dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(AArch64ISD::DUP, dl, VT, Value);
548536b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
5486dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // This is actually a DUPLANExx operation, which keeps everything vectory.
5487dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5488dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // DUPLANE works on 128-bit vectors, widen it if necessary.
5489dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      SDValue Lane = Value.getOperand(1);
5490dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Value = Value.getOperand(0);
5491dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (Value.getValueType().getSizeInBits() == 64)
5492dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        Value = WidenVector(Value, DAG);
5493dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5494dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      unsigned Opcode = getDUPLANEOp(VT.getVectorElementType());
5495dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return DAG.getNode(Opcode, dl, VT, Value, Lane);
5496dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
5497dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5498dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (VT.getVectorElementType().isFloatingPoint()) {
5499dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      SmallVector<SDValue, 8> Ops;
5500dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      MVT NewType =
5501dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          (VT.getVectorElementType() == MVT::f32) ? MVT::i32 : MVT::i64;
5502dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      for (unsigned i = 0; i < NumElts; ++i)
5503dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        Ops.push_back(DAG.getNode(ISD::BITCAST, dl, NewType, Op.getOperand(i)));
5504dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      EVT VecVT = EVT::getVectorVT(*DAG.getContext(), NewType, NumElts);
5505dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      SDValue Val = DAG.getNode(ISD::BUILD_VECTOR, dl, VecVT, Ops);
5506dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Val = LowerBUILD_VECTOR(Val, DAG);
5507dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (Val.getNode())
5508dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(ISD::BITCAST, dl, VT, Val);
5509767f816b926376bd850a62a28d35343ad0559c91Kevin Qin    }
5510dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
5511dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5512dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // If there was only one constant value used and for more than one lane,
5513dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // start by splatting that value, then replace the non-constant lanes. This
5514dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // is better than the default, which will perform a separate initialization
5515dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // for each lane.
5516dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (NumConstantLanes > 0 && usesOnlyOneConstantValue) {
5517dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue Val = DAG.getNode(AArch64ISD::DUP, dl, VT, ConstantValue);
5518dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Now insert the non-constant lanes.
5519dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    for (unsigned i = 0; i < NumElts; ++i) {
5520dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      SDValue V = Op.getOperand(i);
5521dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      SDValue LaneIdx = DAG.getConstant(i, MVT::i64);
5522dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (!isa<ConstantSDNode>(V) && !isa<ConstantFPSDNode>(V)) {
5523dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // Note that type legalization likely mucked about with the VT of the
5524dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // source operand, so we may have to convert it here before inserting.
5525dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        Val = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VT, Val, V, LaneIdx);
5526dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
5527767f816b926376bd850a62a28d35343ad0559c91Kevin Qin    }
5528dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return Val;
5529767f816b926376bd850a62a28d35343ad0559c91Kevin Qin  }
5530dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5531767f816b926376bd850a62a28d35343ad0559c91Kevin Qin  // If all elements are constants and the case above didn't get hit, fall back
5532767f816b926376bd850a62a28d35343ad0559c91Kevin Qin  // to the default expansion, which will generate a load from the constant
5533767f816b926376bd850a62a28d35343ad0559c91Kevin Qin  // pool.
5534767f816b926376bd850a62a28d35343ad0559c91Kevin Qin  if (isConstant)
5535767f816b926376bd850a62a28d35343ad0559c91Kevin Qin    return SDValue();
5536767f816b926376bd850a62a28d35343ad0559c91Kevin Qin
5537dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Empirical tests suggest this is rarely worth it for vectors of length <= 2.
5538dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (NumElts >= 4) {
5539dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue shuffle = ReconstructShuffle(Op, DAG);
5540dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (shuffle != SDValue())
5541dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return shuffle;
554236b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines  }
55438a0ff1f236e77214878c9d493e786b30656ad2a1Bill Wendling
5544767f816b926376bd850a62a28d35343ad0559c91Kevin Qin  // If all else fails, just use a sequence of INSERT_VECTOR_ELT when we
5545767f816b926376bd850a62a28d35343ad0559c91Kevin Qin  // know the default expansion would otherwise fall back on something even
5546767f816b926376bd850a62a28d35343ad0559c91Kevin Qin  // worse. For a vector with one or two non-undef values, that's
5547767f816b926376bd850a62a28d35343ad0559c91Kevin Qin  // scalar_to_vector for the elements followed by a shuffle (provided the
5548767f816b926376bd850a62a28d35343ad0559c91Kevin Qin  // shuffle is valid for the target) and materialization element by element
5549767f816b926376bd850a62a28d35343ad0559c91Kevin Qin  // on the stack followed by a load for everything else.
5550767f816b926376bd850a62a28d35343ad0559c91Kevin Qin  if (!isConstant && !usesOnlyOneValue) {
5551767f816b926376bd850a62a28d35343ad0559c91Kevin Qin    SDValue Vec = DAG.getUNDEF(VT);
5552dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue Op0 = Op.getOperand(0);
5553dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned ElemSize = VT.getVectorElementType().getSizeInBits();
5554dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned i = 0;
5555dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // For 32 and 64 bit types, use INSERT_SUBREG for lane zero to
5556dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // a) Avoid a RMW dependency on the full vector register, and
5557dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // b) Allow the register coalescer to fold away the copy if the
5558dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    //    value is already in an S or D register.
5559dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (Op0.getOpcode() != ISD::UNDEF && (ElemSize == 32 || ElemSize == 64)) {
5560dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      unsigned SubIdx = ElemSize == 32 ? AArch64::ssub : AArch64::dsub;
5561dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      MachineSDNode *N =
5562dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          DAG.getMachineNode(TargetOpcode::INSERT_SUBREG, dl, VT, Vec, Op0,
5563dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                             DAG.getTargetConstant(SubIdx, MVT::i32));
5564dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Vec = SDValue(N, 0);
5565dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      ++i;
5566dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
5567dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    for (; i < NumElts; ++i) {
5568767f816b926376bd850a62a28d35343ad0559c91Kevin Qin      SDValue V = Op.getOperand(i);
5569767f816b926376bd850a62a28d35343ad0559c91Kevin Qin      if (V.getOpcode() == ISD::UNDEF)
5570767f816b926376bd850a62a28d35343ad0559c91Kevin Qin        continue;
55718a0ff1f236e77214878c9d493e786b30656ad2a1Bill Wendling      SDValue LaneIdx = DAG.getConstant(i, MVT::i64);
5572dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Vec = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VT, Vec, V, LaneIdx);
5573767f816b926376bd850a62a28d35343ad0559c91Kevin Qin    }
5574767f816b926376bd850a62a28d35343ad0559c91Kevin Qin    return Vec;
5575767f816b926376bd850a62a28d35343ad0559c91Kevin Qin  }
5576dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5577dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Just use the default expansion. We failed to find a better alternative.
557887773c318fcee853fb34a80a10c4347d523bdafbTim Northover  return SDValue();
557987773c318fcee853fb34a80a10c4347d523bdafbTim Northover}
558087773c318fcee853fb34a80a10c4347d523bdafbTim Northover
5581dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::LowerINSERT_VECTOR_ELT(SDValue Op,
5582dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                                      SelectionDAG &DAG) const {
5583dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  assert(Op.getOpcode() == ISD::INSERT_VECTOR_ELT && "Unknown opcode!");
5584a08063a000cfc7499f08a472d85f14e7a5e90f8dKevin Qin
5585dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Check for non-constant lane.
5586dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!isa<ConstantSDNode>(Op.getOperand(2)))
5587dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
5588a08063a000cfc7499f08a472d85f14e7a5e90f8dKevin Qin
5589dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT = Op.getOperand(0).getValueType();
5590a08063a000cfc7499f08a472d85f14e7a5e90f8dKevin Qin
5591dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Insertion/extraction are legal for V128 types.
5592dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (VT == MVT::v16i8 || VT == MVT::v8i16 || VT == MVT::v4i32 ||
5593dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      VT == MVT::v2i64 || VT == MVT::v4f32 || VT == MVT::v2f64)
5594dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return Op;
5595a08063a000cfc7499f08a472d85f14e7a5e90f8dKevin Qin
5596dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (VT != MVT::v8i8 && VT != MVT::v4i16 && VT != MVT::v2i32 &&
5597dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      VT != MVT::v1i64 && VT != MVT::v2f32)
5598dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
5599a08063a000cfc7499f08a472d85f14e7a5e90f8dKevin Qin
5600dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // For V64 types, we perform insertion by expanding the value
5601dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // to a V128 type and perform the insertion on that.
5602dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc DL(Op);
5603dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue WideVec = WidenVector(Op.getOperand(0), DAG);
5604dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT WideTy = WideVec.getValueType();
5605dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5606dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Node = DAG.getNode(ISD::INSERT_VECTOR_ELT, DL, WideTy, WideVec,
5607dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                             Op.getOperand(1), Op.getOperand(2));
5608dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Re-narrow the resultant vector.
5609dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return NarrowVector(Node, DAG);
5610dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
5611dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5612dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue
5613dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesAArch64TargetLowering::LowerEXTRACT_VECTOR_ELT(SDValue Op,
5614dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                               SelectionDAG &DAG) const {
5615dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  assert(Op.getOpcode() == ISD::EXTRACT_VECTOR_ELT && "Unknown opcode!");
5616dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5617dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Check for non-constant lane.
5618dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!isa<ConstantSDNode>(Op.getOperand(1)))
5619dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
5620dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5621dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT = Op.getOperand(0).getValueType();
5622dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5623dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Insertion/extraction are legal for V128 types.
5624dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (VT == MVT::v16i8 || VT == MVT::v8i16 || VT == MVT::v4i32 ||
5625dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      VT == MVT::v2i64 || VT == MVT::v4f32 || VT == MVT::v2f64)
5626dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return Op;
5627dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5628dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (VT != MVT::v8i8 && VT != MVT::v4i16 && VT != MVT::v2i32 &&
5629dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      VT != MVT::v1i64 && VT != MVT::v2f32)
5630dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
5631dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5632dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // For V64 types, we perform extraction by expanding the value
5633dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // to a V128 type and perform the extraction on that.
5634dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc DL(Op);
5635dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue WideVec = WidenVector(Op.getOperand(0), DAG);
5636dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT WideTy = WideVec.getValueType();
5637dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5638dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT ExtrTy = WideTy.getVectorElementType();
5639dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (ExtrTy == MVT::i16 || ExtrTy == MVT::i8)
5640dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    ExtrTy = MVT::i32;
5641dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5642dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // For extractions, we just return the result directly.
5643dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, ExtrTy, WideVec,
5644dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                     Op.getOperand(1));
5645dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
5646dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5647dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::LowerEXTRACT_SUBVECTOR(SDValue Op,
5648dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                                      SelectionDAG &DAG) const {
5649dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT = Op.getOperand(0).getValueType();
5650dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc dl(Op);
5651dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Just in case...
5652dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!VT.isVector())
5653dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
5654dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5655dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  ConstantSDNode *Cst = dyn_cast<ConstantSDNode>(Op.getOperand(1));
5656dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!Cst)
5657dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
5658dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned Val = Cst->getZExtValue();
5659dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5660dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned Size = Op.getValueType().getSizeInBits();
5661dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Val == 0) {
5662dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    switch (Size) {
5663dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case 8:
5664dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return DAG.getTargetExtractSubreg(AArch64::bsub, dl, Op.getValueType(),
5665dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                        Op.getOperand(0));
5666dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case 16:
5667dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return DAG.getTargetExtractSubreg(AArch64::hsub, dl, Op.getValueType(),
5668dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                        Op.getOperand(0));
5669dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case 32:
5670dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return DAG.getTargetExtractSubreg(AArch64::ssub, dl, Op.getValueType(),
5671dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                        Op.getOperand(0));
5672dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case 64:
5673dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return DAG.getTargetExtractSubreg(AArch64::dsub, dl, Op.getValueType(),
5674dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                        Op.getOperand(0));
5675dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    default:
5676dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      llvm_unreachable("Unexpected vector type in extract_subvector!");
5677dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
5678dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
5679dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // If this is extracting the upper 64-bits of a 128-bit vector, we match
5680dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // that directly.
5681dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Size == 64 && Val * VT.getVectorElementType().getSizeInBits() == 64)
5682dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return Op;
5683dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5684dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return SDValue();
5685dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
5686dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5687dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesbool AArch64TargetLowering::isShuffleMaskLegal(const SmallVectorImpl<int> &M,
5688dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                               EVT VT) const {
5689dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (VT.getVectorNumElements() == 4 &&
5690dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      (VT.is128BitVector() || VT.is64BitVector())) {
5691dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned PFIndexes[4];
5692dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    for (unsigned i = 0; i != 4; ++i) {
5693dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (M[i] < 0)
5694dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        PFIndexes[i] = 8;
5695dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      else
5696dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        PFIndexes[i] = M[i];
5697dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
5698dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5699dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Compute the index in the perfect shuffle table.
5700dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned PFTableIndex = PFIndexes[0] * 9 * 9 * 9 + PFIndexes[1] * 9 * 9 +
5701dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                            PFIndexes[2] * 9 + PFIndexes[3];
5702dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned PFEntry = PerfectShuffleTable[PFTableIndex];
5703dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned Cost = (PFEntry >> 30);
5704dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5705dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (Cost <= 4)
5706dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return true;
5707dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
5708dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5709dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  bool DummyBool;
5710dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  int DummyInt;
5711dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned DummyUnsigned;
5712dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5713dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return (ShuffleVectorSDNode::isSplatMask(&M[0], VT) || isREVMask(M, VT, 64) ||
5714dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          isREVMask(M, VT, 32) || isREVMask(M, VT, 16) ||
5715dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          isEXTMask(M, VT, DummyBool, DummyUnsigned) ||
5716dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          // isTBLMask(M, VT) || // FIXME: Port TBL support from ARM.
5717dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          isTRNMask(M, VT, DummyUnsigned) || isUZPMask(M, VT, DummyUnsigned) ||
5718dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          isZIPMask(M, VT, DummyUnsigned) ||
5719dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          isTRN_v_undef_Mask(M, VT, DummyUnsigned) ||
5720dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          isUZP_v_undef_Mask(M, VT, DummyUnsigned) ||
5721dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          isZIP_v_undef_Mask(M, VT, DummyUnsigned) ||
5722dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          isINSMask(M, VT.getVectorNumElements(), DummyBool, DummyInt) ||
5723dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          isConcatMask(M, VT, VT.getSizeInBits() == 128));
5724dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
5725dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5726dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// getVShiftImm - Check if this is a valid build_vector for the immediate
5727dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// operand of a vector shift operation, where all the elements of the
5728dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// build_vector must have the same constant integer value.
5729dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic bool getVShiftImm(SDValue Op, unsigned ElementBits, int64_t &Cnt) {
5730dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Ignore bit_converts.
5731dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  while (Op.getOpcode() == ISD::BITCAST)
5732dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Op = Op.getOperand(0);
5733dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  BuildVectorSDNode *BVN = dyn_cast<BuildVectorSDNode>(Op.getNode());
5734dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  APInt SplatBits, SplatUndef;
5735dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned SplatBitSize;
5736dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  bool HasAnyUndefs;
5737dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!BVN || !BVN->isConstantSplat(SplatBits, SplatUndef, SplatBitSize,
5738dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                    HasAnyUndefs, ElementBits) ||
5739dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      SplatBitSize > ElementBits)
5740dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return false;
5741dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Cnt = SplatBits.getSExtValue();
5742dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return true;
5743dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
5744dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5745dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// isVShiftLImm - Check if this is a valid build_vector for the immediate
5746dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// operand of a vector shift left operation.  That value must be in the range:
5747dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines///   0 <= Value < ElementBits for a left shift; or
5748dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines///   0 <= Value <= ElementBits for a long left shift.
5749dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic bool isVShiftLImm(SDValue Op, EVT VT, bool isLong, int64_t &Cnt) {
5750dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  assert(VT.isVector() && "vector shift count is not a vector type");
5751dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned ElementBits = VT.getVectorElementType().getSizeInBits();
5752dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!getVShiftImm(Op, ElementBits, Cnt))
5753dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return false;
5754dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return (Cnt >= 0 && (isLong ? Cnt - 1 : Cnt) < ElementBits);
5755dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
5756dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5757dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// isVShiftRImm - Check if this is a valid build_vector for the immediate
5758dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// operand of a vector shift right operation.  For a shift opcode, the value
5759dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// is positive, but for an intrinsic the value count must be negative. The
5760dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// absolute value must be in the range:
5761dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines///   1 <= |Value| <= ElementBits for a right shift; or
5762dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines///   1 <= |Value| <= ElementBits/2 for a narrow right shift.
5763dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic bool isVShiftRImm(SDValue Op, EVT VT, bool isNarrow, bool isIntrinsic,
5764dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                         int64_t &Cnt) {
5765dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  assert(VT.isVector() && "vector shift count is not a vector type");
5766dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned ElementBits = VT.getVectorElementType().getSizeInBits();
5767dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!getVShiftImm(Op, ElementBits, Cnt))
5768dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return false;
5769dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (isIntrinsic)
5770dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Cnt = -Cnt;
5771dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return (Cnt >= 1 && Cnt <= (isNarrow ? ElementBits / 2 : ElementBits));
5772dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
5773dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5774dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::LowerVectorSRA_SRL_SHL(SDValue Op,
5775dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                                      SelectionDAG &DAG) const {
5776dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT = Op.getValueType();
5777dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc DL(Op);
5778dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  int64_t Cnt;
5779dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5780dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!Op.getOperand(1).getValueType().isVector())
5781dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return Op;
5782dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned EltSize = VT.getVectorElementType().getSizeInBits();
5783dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5784dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  switch (Op.getOpcode()) {
5785dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  default:
5786dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    llvm_unreachable("unexpected shift opcode");
5787dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5788dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SHL:
5789dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (isVShiftLImm(Op.getOperand(1), VT, false, Cnt) && Cnt < EltSize)
5790dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return DAG.getNode(AArch64ISD::VSHL, SDLoc(Op), VT, Op.getOperand(0),
5791dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                         DAG.getConstant(Cnt, MVT::i32));
5792dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
5793dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                       DAG.getConstant(Intrinsic::aarch64_neon_ushl, MVT::i32),
5794dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                       Op.getOperand(0), Op.getOperand(1));
5795dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SRA:
5796dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SRL:
5797dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Right shift immediate
5798dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (isVShiftRImm(Op.getOperand(1), VT, false, false, Cnt) &&
5799dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        Cnt < EltSize) {
5800dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      unsigned Opc =
5801dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          (Op.getOpcode() == ISD::SRA) ? AArch64ISD::VASHR : AArch64ISD::VLSHR;
5802dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return DAG.getNode(Opc, SDLoc(Op), VT, Op.getOperand(0),
5803dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                         DAG.getConstant(Cnt, MVT::i32));
5804dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
5805dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5806dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Right shift register.  Note, there is not a shift right register
5807dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // instruction, but the shift left register instruction takes a signed
5808dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // value, where negative numbers specify a right shift.
5809dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned Opc = (Op.getOpcode() == ISD::SRA) ? Intrinsic::aarch64_neon_sshl
5810dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                                : Intrinsic::aarch64_neon_ushl;
5811dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // negate the shift amount
5812dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue NegShift = DAG.getNode(AArch64ISD::NEG, DL, VT, Op.getOperand(1));
5813dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue NegShiftLeft =
5814dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
5815dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                    DAG.getConstant(Opc, MVT::i32), Op.getOperand(0), NegShift);
5816dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return NegShiftLeft;
5817dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
5818dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5819dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return SDValue();
5820dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
5821dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5822dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue EmitVectorComparison(SDValue LHS, SDValue RHS,
5823dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                    AArch64CC::CondCode CC, bool NoNans, EVT VT,
5824dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                    SDLoc dl, SelectionDAG &DAG) {
5825dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT SrcVT = LHS.getValueType();
5826dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5827dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  BuildVectorSDNode *BVN = dyn_cast<BuildVectorSDNode>(RHS.getNode());
5828dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  APInt CnstBits(VT.getSizeInBits(), 0);
5829dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  APInt UndefBits(VT.getSizeInBits(), 0);
5830dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  bool IsCnst = BVN && resolveBuildVector(BVN, CnstBits, UndefBits);
5831dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  bool IsZero = IsCnst && (CnstBits == 0);
5832dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5833dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (SrcVT.getVectorElementType().isFloatingPoint()) {
5834dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    switch (CC) {
5835dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    default:
5836dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return SDValue();
5837dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case AArch64CC::NE: {
5838dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      SDValue Fcmeq;
5839dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (IsZero)
5840dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        Fcmeq = DAG.getNode(AArch64ISD::FCMEQz, dl, VT, LHS);
5841dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      else
5842dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        Fcmeq = DAG.getNode(AArch64ISD::FCMEQ, dl, VT, LHS, RHS);
5843dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return DAG.getNode(AArch64ISD::NOT, dl, VT, Fcmeq);
5844dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
5845dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case AArch64CC::EQ:
5846dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (IsZero)
5847dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(AArch64ISD::FCMEQz, dl, VT, LHS);
5848dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return DAG.getNode(AArch64ISD::FCMEQ, dl, VT, LHS, RHS);
5849dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case AArch64CC::GE:
5850dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (IsZero)
5851dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(AArch64ISD::FCMGEz, dl, VT, LHS);
5852dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return DAG.getNode(AArch64ISD::FCMGE, dl, VT, LHS, RHS);
5853dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case AArch64CC::GT:
5854dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (IsZero)
5855dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(AArch64ISD::FCMGTz, dl, VT, LHS);
5856dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return DAG.getNode(AArch64ISD::FCMGT, dl, VT, LHS, RHS);
5857dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case AArch64CC::LS:
5858dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (IsZero)
5859dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(AArch64ISD::FCMLEz, dl, VT, LHS);
5860dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return DAG.getNode(AArch64ISD::FCMGE, dl, VT, RHS, LHS);
5861dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case AArch64CC::LT:
5862dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (!NoNans)
5863dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return SDValue();
5864dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // If we ignore NaNs then we can use to the MI implementation.
5865dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Fallthrough.
5866dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case AArch64CC::MI:
5867dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (IsZero)
5868dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(AArch64ISD::FCMLTz, dl, VT, LHS);
5869dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return DAG.getNode(AArch64ISD::FCMGT, dl, VT, RHS, LHS);
5870dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
5871dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
5872dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5873dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  switch (CC) {
5874dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  default:
5875dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
5876dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64CC::NE: {
5877dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue Cmeq;
5878dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (IsZero)
5879dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Cmeq = DAG.getNode(AArch64ISD::CMEQz, dl, VT, LHS);
5880dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    else
5881dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Cmeq = DAG.getNode(AArch64ISD::CMEQ, dl, VT, LHS, RHS);
5882dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::NOT, dl, VT, Cmeq);
5883dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
5884dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64CC::EQ:
5885dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (IsZero)
5886dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return DAG.getNode(AArch64ISD::CMEQz, dl, VT, LHS);
5887dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::CMEQ, dl, VT, LHS, RHS);
5888dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64CC::GE:
5889dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (IsZero)
5890dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return DAG.getNode(AArch64ISD::CMGEz, dl, VT, LHS);
5891dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::CMGE, dl, VT, LHS, RHS);
5892dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64CC::GT:
5893dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (IsZero)
5894dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return DAG.getNode(AArch64ISD::CMGTz, dl, VT, LHS);
5895dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::CMGT, dl, VT, LHS, RHS);
5896dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64CC::LE:
5897dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (IsZero)
5898dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return DAG.getNode(AArch64ISD::CMLEz, dl, VT, LHS);
5899dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::CMGE, dl, VT, RHS, LHS);
5900dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64CC::LS:
5901dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::CMHS, dl, VT, RHS, LHS);
5902dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64CC::LO:
5903dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::CMHI, dl, VT, RHS, LHS);
5904dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64CC::LT:
5905dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (IsZero)
5906dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return DAG.getNode(AArch64ISD::CMLTz, dl, VT, LHS);
5907dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::CMGT, dl, VT, RHS, LHS);
5908dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64CC::HI:
5909dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::CMHI, dl, VT, LHS, RHS);
5910dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64CC::HS:
5911dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::CMHS, dl, VT, LHS, RHS);
5912dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
5913dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
5914dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5915dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::LowerVSETCC(SDValue Op,
5916dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                           SelectionDAG &DAG) const {
5917dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(2))->get();
5918dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue LHS = Op.getOperand(0);
5919dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue RHS = Op.getOperand(1);
5920dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc dl(Op);
5921dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5922dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (LHS.getValueType().getVectorElementType().isInteger()) {
5923dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    assert(LHS.getValueType() == RHS.getValueType());
5924dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    AArch64CC::CondCode AArch64CC = changeIntCCToAArch64CC(CC);
5925dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return EmitVectorComparison(LHS, RHS, AArch64CC, false, Op.getValueType(),
5926dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                dl, DAG);
5927dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
5928dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5929dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  assert(LHS.getValueType().getVectorElementType() == MVT::f32 ||
5930dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines         LHS.getValueType().getVectorElementType() == MVT::f64);
5931dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5932dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Unfortunately, the mapping of LLVM FP CC's onto AArch64 CC's isn't totally
5933dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // clean.  Some of them require two branches to implement.
5934dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  AArch64CC::CondCode CC1, CC2;
5935dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  bool ShouldInvert;
5936dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  changeVectorFPCCToAArch64CC(CC, CC1, CC2, ShouldInvert);
5937dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5938dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  bool NoNaNs = getTargetMachine().Options.NoNaNsFPMath;
5939dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Cmp =
5940dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      EmitVectorComparison(LHS, RHS, CC1, NoNaNs, Op.getValueType(), dl, DAG);
5941dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!Cmp.getNode())
5942dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
5943dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5944dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (CC2 != AArch64CC::AL) {
5945dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue Cmp2 =
5946dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        EmitVectorComparison(LHS, RHS, CC2, NoNaNs, Op.getValueType(), dl, DAG);
5947dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (!Cmp2.getNode())
5948dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return SDValue();
5949dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5950dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Cmp = DAG.getNode(ISD::OR, dl, Cmp.getValueType(), Cmp, Cmp2);
5951dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
5952dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5953dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (ShouldInvert)
5954dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return Cmp = DAG.getNOT(dl, Cmp, Cmp.getValueType());
5955dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5956dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return Cmp;
5957dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
5958dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
5959dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// getTgtMemIntrinsic - Represent NEON load and store intrinsics as
5960dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// MemIntrinsicNodes.  The associated MachineMemOperands record the alignment
5961dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// specified in the intrinsic calls.
5962dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesbool AArch64TargetLowering::getTgtMemIntrinsic(IntrinsicInfo &Info,
5963dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                               const CallInst &I,
5964dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                               unsigned Intrinsic) const {
5965dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  switch (Intrinsic) {
5966dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_neon_ld2:
5967dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_neon_ld3:
5968dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_neon_ld4:
5969dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_neon_ld1x2:
5970dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_neon_ld1x3:
5971dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_neon_ld1x4:
5972dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_neon_ld2lane:
5973dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_neon_ld3lane:
5974dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_neon_ld4lane:
5975dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_neon_ld2r:
5976dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_neon_ld3r:
5977dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_neon_ld4r: {
5978dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.opc = ISD::INTRINSIC_W_CHAIN;
5979dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Conservatively set memVT to the entire set of vectors loaded.
5980dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    uint64_t NumElts = getDataLayout()->getTypeAllocSize(I.getType()) / 8;
5981dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.memVT = EVT::getVectorVT(I.getType()->getContext(), MVT::i64, NumElts);
5982dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.ptrVal = I.getArgOperand(I.getNumArgOperands() - 1);
5983dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.offset = 0;
5984dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.align = 0;
5985dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.vol = false; // volatile loads with NEON intrinsics not supported
5986dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.readMem = true;
5987dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.writeMem = false;
5988dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return true;
5989dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
5990dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_neon_st2:
5991dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_neon_st3:
5992dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_neon_st4:
5993dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_neon_st1x2:
5994dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_neon_st1x3:
5995dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_neon_st1x4:
5996dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_neon_st2lane:
5997dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_neon_st3lane:
5998dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_neon_st4lane: {
5999dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.opc = ISD::INTRINSIC_VOID;
6000dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Conservatively set memVT to the entire set of vectors stored.
6001dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned NumElts = 0;
6002dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    for (unsigned ArgI = 1, ArgE = I.getNumArgOperands(); ArgI < ArgE; ++ArgI) {
6003dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Type *ArgTy = I.getArgOperand(ArgI)->getType();
6004dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (!ArgTy->isVectorTy())
6005dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        break;
6006dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      NumElts += getDataLayout()->getTypeAllocSize(ArgTy) / 8;
6007dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
6008dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.memVT = EVT::getVectorVT(I.getType()->getContext(), MVT::i64, NumElts);
6009dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.ptrVal = I.getArgOperand(I.getNumArgOperands() - 1);
6010dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.offset = 0;
6011dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.align = 0;
6012dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.vol = false; // volatile stores with NEON intrinsics not supported
6013dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.readMem = false;
6014dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.writeMem = true;
6015dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return true;
6016dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
6017dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_ldaxr:
6018dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_ldxr: {
6019dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    PointerType *PtrTy = cast<PointerType>(I.getArgOperand(0)->getType());
6020dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.opc = ISD::INTRINSIC_W_CHAIN;
6021dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.memVT = MVT::getVT(PtrTy->getElementType());
6022dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.ptrVal = I.getArgOperand(0);
6023dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.offset = 0;
6024dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.align = getDataLayout()->getABITypeAlignment(PtrTy->getElementType());
6025dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.vol = true;
6026dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.readMem = true;
6027dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.writeMem = false;
6028dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return true;
6029dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
6030dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_stlxr:
6031dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_stxr: {
6032dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    PointerType *PtrTy = cast<PointerType>(I.getArgOperand(1)->getType());
6033dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.opc = ISD::INTRINSIC_W_CHAIN;
6034dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.memVT = MVT::getVT(PtrTy->getElementType());
6035dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.ptrVal = I.getArgOperand(1);
6036dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.offset = 0;
6037dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.align = getDataLayout()->getABITypeAlignment(PtrTy->getElementType());
6038dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.vol = true;
6039dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.readMem = false;
6040dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.writeMem = true;
6041dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return true;
6042dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
6043dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_ldaxp:
6044dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_ldxp: {
6045dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.opc = ISD::INTRINSIC_W_CHAIN;
6046dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.memVT = MVT::i128;
6047dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.ptrVal = I.getArgOperand(0);
6048dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.offset = 0;
6049dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.align = 16;
6050dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.vol = true;
6051dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.readMem = true;
6052dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.writeMem = false;
6053dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return true;
6054dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
6055dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_stlxp:
6056dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_stxp: {
6057dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.opc = ISD::INTRINSIC_W_CHAIN;
6058dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.memVT = MVT::i128;
6059dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.ptrVal = I.getArgOperand(2);
6060dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.offset = 0;
6061dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.align = 16;
6062dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.vol = true;
6063dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.readMem = false;
6064dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Info.writeMem = true;
6065dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return true;
6066dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
6067dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  default:
6068dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
6069dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
6070dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6071dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return false;
6072dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
6073dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6074dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// Truncations from 64-bit GPR to 32-bit GPR is free.
6075dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesbool AArch64TargetLowering::isTruncateFree(Type *Ty1, Type *Ty2) const {
6076dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!Ty1->isIntegerTy() || !Ty2->isIntegerTy())
6077dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return false;
6078dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned NumBits1 = Ty1->getPrimitiveSizeInBits();
6079dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned NumBits2 = Ty2->getPrimitiveSizeInBits();
6080cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines  return NumBits1 > NumBits2;
6081dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
6082dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesbool AArch64TargetLowering::isTruncateFree(EVT VT1, EVT VT2) const {
6083cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines  if (VT1.isVector() || VT2.isVector() || !VT1.isInteger() || !VT2.isInteger())
6084dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return false;
6085dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned NumBits1 = VT1.getSizeInBits();
6086dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned NumBits2 = VT2.getSizeInBits();
6087cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines  return NumBits1 > NumBits2;
6088dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
6089dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6090dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// All 32-bit GPR operations implicitly zero the high-half of the corresponding
6091dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// 64-bit GPR.
6092dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesbool AArch64TargetLowering::isZExtFree(Type *Ty1, Type *Ty2) const {
6093dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!Ty1->isIntegerTy() || !Ty2->isIntegerTy())
6094dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return false;
6095dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned NumBits1 = Ty1->getPrimitiveSizeInBits();
6096dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned NumBits2 = Ty2->getPrimitiveSizeInBits();
6097cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines  return NumBits1 == 32 && NumBits2 == 64;
6098dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
6099dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesbool AArch64TargetLowering::isZExtFree(EVT VT1, EVT VT2) const {
6100cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines  if (VT1.isVector() || VT2.isVector() || !VT1.isInteger() || !VT2.isInteger())
6101dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return false;
6102dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned NumBits1 = VT1.getSizeInBits();
6103dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned NumBits2 = VT2.getSizeInBits();
6104cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines  return NumBits1 == 32 && NumBits2 == 64;
6105dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
6106dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6107dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesbool AArch64TargetLowering::isZExtFree(SDValue Val, EVT VT2) const {
6108dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT1 = Val.getValueType();
6109dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (isZExtFree(VT1, VT2)) {
6110dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return true;
6111dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
6112dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6113dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Val.getOpcode() != ISD::LOAD)
6114dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return false;
6115dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6116dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // 8-, 16-, and 32-bit integer loads all implicitly zero-extend.
6117cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines  return (VT1.isSimple() && !VT1.isVector() && VT1.isInteger() &&
6118cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines          VT2.isSimple() && !VT2.isVector() && VT2.isInteger() &&
6119cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines          VT1.getSizeInBits() <= 32);
6120dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
6121dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6122dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesbool AArch64TargetLowering::hasPairedLoad(Type *LoadedType,
6123dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                          unsigned &RequiredAligment) const {
6124dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!LoadedType->isIntegerTy() && !LoadedType->isFloatTy())
6125dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return false;
6126dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Cyclone supports unaligned accesses.
6127dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  RequiredAligment = 0;
6128dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned NumBits = LoadedType->getPrimitiveSizeInBits();
6129dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return NumBits == 32 || NumBits == 64;
6130dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
6131dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6132dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesbool AArch64TargetLowering::hasPairedLoad(EVT LoadedType,
6133dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                          unsigned &RequiredAligment) const {
6134dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!LoadedType.isSimple() ||
6135dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      (!LoadedType.isInteger() && !LoadedType.isFloatingPoint()))
6136dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return false;
6137dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Cyclone supports unaligned accesses.
6138dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  RequiredAligment = 0;
6139dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned NumBits = LoadedType.getSizeInBits();
6140dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return NumBits == 32 || NumBits == 64;
6141dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
6142dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6143dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic bool memOpAlign(unsigned DstAlign, unsigned SrcAlign,
6144dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                       unsigned AlignCheck) {
6145dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return ((SrcAlign == 0 || SrcAlign % AlignCheck == 0) &&
6146dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          (DstAlign == 0 || DstAlign % AlignCheck == 0));
6147dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
6148dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6149dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesEVT AArch64TargetLowering::getOptimalMemOpType(uint64_t Size, unsigned DstAlign,
6150dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                               unsigned SrcAlign, bool IsMemset,
6151dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                               bool ZeroMemset,
6152dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                               bool MemcpyStrSrc,
6153dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                               MachineFunction &MF) const {
6154dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Don't use AdvSIMD to implement 16-byte memset. It would have taken one
6155dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // instruction to materialize the v2i64 zero and one store (with restrictive
6156dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // addressing mode). Just do two i64 store of zero-registers.
6157dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  bool Fast;
6158dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  const Function *F = MF.getFunction();
6159dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Subtarget->hasFPARMv8() && !IsMemset && Size >= 16 &&
6160dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      !F->getAttributes().hasAttribute(AttributeSet::FunctionIndex,
6161dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                       Attribute::NoImplicitFloat) &&
6162dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      (memOpAlign(SrcAlign, DstAlign, 16) ||
6163dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines       (allowsUnalignedMemoryAccesses(MVT::f128, 0, &Fast) && Fast)))
6164dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return MVT::f128;
6165dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6166dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return Size >= 8 ? MVT::i64 : MVT::i32;
6167dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
6168dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6169dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// 12-bit optionally shifted immediates are legal for adds.
6170dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesbool AArch64TargetLowering::isLegalAddImmediate(int64_t Immed) const {
6171dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if ((Immed >> 12) == 0 || ((Immed & 0xfff) == 0 && Immed >> 24 == 0))
6172dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return true;
6173dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return false;
6174dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
6175dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6176dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// Integer comparisons are implemented with ADDS/SUBS, so the range of valid
6177dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// immediates is the same as for an add or a sub.
6178dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesbool AArch64TargetLowering::isLegalICmpImmediate(int64_t Immed) const {
6179dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Immed < 0)
6180dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Immed *= -1;
6181dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return isLegalAddImmediate(Immed);
6182dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
6183dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6184dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// isLegalAddressingMode - Return true if the addressing mode represented
6185dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// by AM is legal for this target, for a load/store of the specified type.
6186dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesbool AArch64TargetLowering::isLegalAddressingMode(const AddrMode &AM,
6187dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                                  Type *Ty) const {
6188dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // AArch64 has five basic addressing modes:
6189dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //  reg
6190dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //  reg + 9-bit signed offset
6191dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //  reg + SIZE_IN_BYTES * 12-bit unsigned offset
6192dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //  reg1 + reg2
6193dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //  reg + SIZE_IN_BYTES * reg
6194dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6195dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // No global is ever allowed as a base.
6196dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (AM.BaseGV)
6197dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return false;
6198dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6199dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // No reg+reg+imm addressing.
6200dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (AM.HasBaseReg && AM.BaseOffs && AM.Scale)
6201dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return false;
6202dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6203dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // check reg + imm case:
6204dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // i.e., reg + 0, reg + imm9, reg + SIZE_IN_BYTES * uimm12
6205dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  uint64_t NumBytes = 0;
6206dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Ty->isSized()) {
6207dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    uint64_t NumBits = getDataLayout()->getTypeSizeInBits(Ty);
6208dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    NumBytes = NumBits / 8;
6209dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (!isPowerOf2_64(NumBits))
6210dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      NumBytes = 0;
6211dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
6212dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6213dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!AM.Scale) {
6214dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    int64_t Offset = AM.BaseOffs;
6215dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6216dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // 9-bit signed offset
6217dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (Offset >= -(1LL << 9) && Offset <= (1LL << 9) - 1)
6218dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return true;
6219dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6220dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // 12-bit unsigned offset
6221dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned shift = Log2_64(NumBytes);
6222dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (NumBytes && Offset > 0 && (Offset / NumBytes) <= (1LL << 12) - 1 &&
6223dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // Must be a multiple of NumBytes (NumBytes is a power of 2)
6224dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        (Offset >> shift) << shift == Offset)
6225dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return true;
6226dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return false;
6227dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
6228dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6229dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Check reg1 + SIZE_IN_BYTES * reg2 and reg1 + reg2
6230dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6231dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!AM.Scale || AM.Scale == 1 ||
6232dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      (AM.Scale > 0 && (uint64_t)AM.Scale == NumBytes))
6233dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return true;
6234dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return false;
6235dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
6236dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6237dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesint AArch64TargetLowering::getScalingFactorCost(const AddrMode &AM,
6238dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                                Type *Ty) const {
6239dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Scaling factors are not free at all.
6240dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Operands                     | Rt Latency
6241dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // -------------------------------------------
6242dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Rt, [Xn, Xm]                 | 4
6243dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // -------------------------------------------
6244dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Rt, [Xn, Xm, lsl #imm]       | Rn: 4 Rm: 5
6245dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Rt, [Xn, Wm, <extend> #imm]  |
6246dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (isLegalAddressingMode(AM, Ty))
6247dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Scale represents reg2 * scale, thus account for 1 if
6248dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // it is not equal to 0 or 1.
6249dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return AM.Scale != 0 && AM.Scale != 1;
6250dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return -1;
6251dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
6252dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6253dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesbool AArch64TargetLowering::isFMAFasterThanFMulAndFAdd(EVT VT) const {
6254dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  VT = VT.getScalarType();
6255dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6256dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!VT.isSimple())
6257dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return false;
6258dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6259dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  switch (VT.getSimpleVT().SimpleTy) {
6260dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case MVT::f32:
6261dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case MVT::f64:
6262dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return true;
6263dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  default:
6264dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
6265dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
6266dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6267dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return false;
6268dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
6269dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6270dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesconst MCPhysReg *
6271dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesAArch64TargetLowering::getScratchRegisters(CallingConv::ID) const {
6272dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // LR is a callee-save register, but we must treat it as clobbered by any call
6273dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // site. Hence we include LR in the scratch registers, which are in turn added
6274dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // as implicit-defs for stackmaps and patchpoints.
6275dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  static const MCPhysReg ScratchRegs[] = {
6276dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    AArch64::X16, AArch64::X17, AArch64::LR, 0
6277dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  };
6278dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return ScratchRegs;
6279dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
6280dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6281dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesbool
6282dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesAArch64TargetLowering::isDesirableToCommuteWithShift(const SDNode *N) const {
6283dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT = N->getValueType(0);
6284dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // If N is unsigned bit extraction: ((x >> C) & mask), then do not combine
6285dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // it with shift to let it be lowered to UBFX.
6286dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (N->getOpcode() == ISD::AND && (VT == MVT::i32 || VT == MVT::i64) &&
6287dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      isa<ConstantSDNode>(N->getOperand(1))) {
6288dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    uint64_t TruncMask = N->getConstantOperandVal(1);
6289dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (isMask_64(TruncMask) &&
6290dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      N->getOperand(0).getOpcode() == ISD::SRL &&
6291dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      isa<ConstantSDNode>(N->getOperand(0)->getOperand(1)))
6292dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return false;
6293dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
6294dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return true;
6295dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
6296dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6297dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesbool AArch64TargetLowering::shouldConvertConstantLoadToIntImm(const APInt &Imm,
6298dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                                              Type *Ty) const {
6299dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  assert(Ty->isIntegerTy());
6300dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6301dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned BitSize = Ty->getPrimitiveSizeInBits();
6302dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (BitSize == 0)
6303dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return false;
6304dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6305dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  int64_t Val = Imm.getSExtValue();
6306dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Val == 0 || AArch64_AM::isLogicalImmediate(Val, BitSize))
6307dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return true;
6308dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6309dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if ((int64_t)Val < 0)
6310dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Val = ~Val;
6311dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (BitSize == 32)
6312dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Val &= (1LL << 32) - 1;
6313dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6314dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned LZ = countLeadingZeros((uint64_t)Val);
6315dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned Shift = (63 - LZ) / 16;
6316dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // MOVZ is free so return true for one or fewer MOVK.
6317dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return (Shift < 3) ? true : false;
6318dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
6319dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6320dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// Generate SUBS and CSEL for integer abs.
6321dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue performIntegerAbsCombine(SDNode *N, SelectionDAG &DAG) {
6322dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT = N->getValueType(0);
6323dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6324dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue N0 = N->getOperand(0);
6325dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue N1 = N->getOperand(1);
6326dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc DL(N);
6327dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6328dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Check pattern of XOR(ADD(X,Y), Y) where Y is SRA(X, size(X)-1)
6329dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // and change it to SUB and CSEL.
6330dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (VT.isInteger() && N->getOpcode() == ISD::XOR &&
6331dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      N0.getOpcode() == ISD::ADD && N0.getOperand(1) == N1 &&
6332dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      N1.getOpcode() == ISD::SRA && N1.getOperand(0) == N0.getOperand(0))
6333dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (ConstantSDNode *Y1C = dyn_cast<ConstantSDNode>(N1.getOperand(1)))
6334dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (Y1C->getAPIntValue() == VT.getSizeInBits() - 1) {
6335dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue Neg = DAG.getNode(ISD::SUB, DL, VT, DAG.getConstant(0, VT),
6336dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  N0.getOperand(0));
6337dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        // Generate SUBS & CSEL.
6338dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SDValue Cmp =
6339dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines            DAG.getNode(AArch64ISD::SUBS, DL, DAG.getVTList(VT, MVT::i32),
6340dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                        N0.getOperand(0), DAG.getConstant(0, VT));
6341dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(AArch64ISD::CSEL, DL, VT, N0.getOperand(0), Neg,
6342dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                           DAG.getConstant(AArch64CC::PL, MVT::i32),
6343dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                           SDValue(Cmp.getNode(), 1));
6344dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
6345dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return SDValue();
6346dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
6347dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6348dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// performXorCombine - Attempts to handle integer ABS.
6349dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue performXorCombine(SDNode *N, SelectionDAG &DAG,
6350dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                 TargetLowering::DAGCombinerInfo &DCI,
6351dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                 const AArch64Subtarget *Subtarget) {
6352dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (DCI.isBeforeLegalizeOps())
6353dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
6354dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6355dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return performIntegerAbsCombine(N, DAG);
6356dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
6357dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6358dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue performMulCombine(SDNode *N, SelectionDAG &DAG,
6359dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                 TargetLowering::DAGCombinerInfo &DCI,
6360dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                 const AArch64Subtarget *Subtarget) {
6361dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (DCI.isBeforeLegalizeOps())
6362dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
6363dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6364dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Multiplication of a power of two plus/minus one can be done more
6365dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // cheaply as as shift+add/sub. For now, this is true unilaterally. If
6366dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // future CPUs have a cheaper MADD instruction, this may need to be
6367dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // gated on a subtarget feature. For Cyclone, 32-bit MADD is 4 cycles and
6368dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // 64-bit is 5 cycles, so this is always a win.
6369dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(N->getOperand(1))) {
6370dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    APInt Value = C->getAPIntValue();
6371dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    EVT VT = N->getValueType(0);
6372cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines    if (Value.isNonNegative()) {
6373cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      // (mul x, 2^N + 1) => (add (shl x, N), x)
6374cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      APInt VM1 = Value - 1;
6375cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      if (VM1.isPowerOf2()) {
6376cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines        SDValue ShiftedVal =
6377cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines            DAG.getNode(ISD::SHL, SDLoc(N), VT, N->getOperand(0),
6378cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines                        DAG.getConstant(VM1.logBase2(), MVT::i64));
6379cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines        return DAG.getNode(ISD::ADD, SDLoc(N), VT, ShiftedVal,
6380cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines                           N->getOperand(0));
6381cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      }
6382cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      // (mul x, 2^N - 1) => (sub (shl x, N), x)
6383cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      APInt VP1 = Value + 1;
6384cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      if (VP1.isPowerOf2()) {
6385cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines        SDValue ShiftedVal =
6386cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines            DAG.getNode(ISD::SHL, SDLoc(N), VT, N->getOperand(0),
6387cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines                        DAG.getConstant(VP1.logBase2(), MVT::i64));
6388cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines        return DAG.getNode(ISD::SUB, SDLoc(N), VT, ShiftedVal,
6389cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines                           N->getOperand(0));
6390cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      }
6391cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines    } else {
6392cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      // (mul x, -(2^N + 1)) => - (add (shl x, N), x)
6393cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      APInt VNM1 = -Value - 1;
6394cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      if (VNM1.isPowerOf2()) {
6395cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines        SDValue ShiftedVal =
6396cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines            DAG.getNode(ISD::SHL, SDLoc(N), VT, N->getOperand(0),
6397cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines                        DAG.getConstant(VNM1.logBase2(), MVT::i64));
6398cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines        SDValue Add =
6399cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines            DAG.getNode(ISD::ADD, SDLoc(N), VT, ShiftedVal, N->getOperand(0));
6400cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines        return DAG.getNode(ISD::SUB, SDLoc(N), VT, DAG.getConstant(0, VT), Add);
6401cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      }
6402cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      // (mul x, -(2^N - 1)) => (sub x, (shl x, N))
6403cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      APInt VNP1 = -Value + 1;
6404cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      if (VNP1.isPowerOf2()) {
6405cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines        SDValue ShiftedVal =
6406cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines            DAG.getNode(ISD::SHL, SDLoc(N), VT, N->getOperand(0),
6407cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines                        DAG.getConstant(VNP1.logBase2(), MVT::i64));
6408cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines        return DAG.getNode(ISD::SUB, SDLoc(N), VT, N->getOperand(0),
6409cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines                           ShiftedVal);
6410cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      }
6411dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
6412dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
6413dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return SDValue();
6414dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
6415dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6416dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue performIntToFpCombine(SDNode *N, SelectionDAG &DAG) {
6417dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT = N->getValueType(0);
6418dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (VT != MVT::f32 && VT != MVT::f64)
6419dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
6420dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Only optimize when the source and destination types have the same width.
6421dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (VT.getSizeInBits() != N->getOperand(0).getValueType().getSizeInBits())
6422dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
6423dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6424dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // If the result of an integer load is only used by an integer-to-float
6425dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // conversion, use a fp load instead and a AdvSIMD scalar {S|U}CVTF instead.
6426dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // This eliminates an "integer-to-vector-move UOP and improve throughput.
6427dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue N0 = N->getOperand(0);
6428dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (ISD::isNormalLoad(N0.getNode()) && N0.hasOneUse() &&
6429dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      // Do not change the width of a volatile load.
6430dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      !cast<LoadSDNode>(N0)->isVolatile()) {
6431dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    LoadSDNode *LN0 = cast<LoadSDNode>(N0);
6432dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue Load = DAG.getLoad(VT, SDLoc(N), LN0->getChain(), LN0->getBasePtr(),
6433dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                               LN0->getPointerInfo(), LN0->isVolatile(),
6434dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                               LN0->isNonTemporal(), LN0->isInvariant(),
6435dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                               LN0->getAlignment());
6436dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6437dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Make sure successors of the original load stay after it by updating them
6438dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // to use the new Chain.
6439dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    DAG.ReplaceAllUsesOfValueWith(SDValue(LN0, 1), Load.getValue(1));
6440dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6441dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned Opcode =
6442dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        (N->getOpcode() == ISD::SINT_TO_FP) ? AArch64ISD::SITOF : AArch64ISD::UITOF;
6443dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(Opcode, SDLoc(N), VT, Load);
6444dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
6445dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6446dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return SDValue();
6447dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
6448dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6449dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// An EXTR instruction is made up of two shifts, ORed together. This helper
6450dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// searches for and classifies those shifts.
6451dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic bool findEXTRHalf(SDValue N, SDValue &Src, uint32_t &ShiftAmount,
6452dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                         bool &FromHi) {
6453dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (N.getOpcode() == ISD::SHL)
6454dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    FromHi = false;
6455dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  else if (N.getOpcode() == ISD::SRL)
6456dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    FromHi = true;
6457dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  else
6458dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return false;
6459dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6460dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!isa<ConstantSDNode>(N.getOperand(1)))
6461dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return false;
6462dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6463dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  ShiftAmount = N->getConstantOperandVal(1);
6464dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Src = N->getOperand(0);
6465dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return true;
6466dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
6467dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6468dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// EXTR instruction extracts a contiguous chunk of bits from two existing
6469dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// registers viewed as a high/low pair. This function looks for the pattern:
6470dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// (or (shl VAL1, #N), (srl VAL2, #RegWidth-N)) and replaces it with an
6471dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// EXTR. Can't quite be done in TableGen because the two immediates aren't
6472dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// independent.
6473dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue tryCombineToEXTR(SDNode *N,
6474dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                TargetLowering::DAGCombinerInfo &DCI) {
6475dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SelectionDAG &DAG = DCI.DAG;
6476dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc DL(N);
6477dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT = N->getValueType(0);
6478dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6479dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  assert(N->getOpcode() == ISD::OR && "Unexpected root");
6480dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6481dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (VT != MVT::i32 && VT != MVT::i64)
6482dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
6483dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6484dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue LHS;
6485dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  uint32_t ShiftLHS = 0;
6486dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  bool LHSFromHi = 0;
6487dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!findEXTRHalf(N->getOperand(0), LHS, ShiftLHS, LHSFromHi))
6488dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
6489dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6490dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue RHS;
6491dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  uint32_t ShiftRHS = 0;
6492dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  bool RHSFromHi = 0;
6493dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!findEXTRHalf(N->getOperand(1), RHS, ShiftRHS, RHSFromHi))
6494dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
6495dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6496dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // If they're both trying to come from the high part of the register, they're
6497dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // not really an EXTR.
6498dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (LHSFromHi == RHSFromHi)
6499dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
6500dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6501dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (ShiftLHS + ShiftRHS != VT.getSizeInBits())
6502dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
6503dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6504dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (LHSFromHi) {
6505dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    std::swap(LHS, RHS);
6506dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    std::swap(ShiftLHS, ShiftRHS);
6507dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
6508dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6509dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return DAG.getNode(AArch64ISD::EXTR, DL, VT, LHS, RHS,
6510dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                     DAG.getConstant(ShiftRHS, MVT::i64));
6511dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
6512dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6513dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue tryCombineToBSL(SDNode *N,
6514dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                TargetLowering::DAGCombinerInfo &DCI) {
6515dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT = N->getValueType(0);
6516dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SelectionDAG &DAG = DCI.DAG;
6517dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc DL(N);
6518dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6519dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!VT.isVector())
6520dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
6521dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6522dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue N0 = N->getOperand(0);
6523dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (N0.getOpcode() != ISD::AND)
6524dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
6525dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6526dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue N1 = N->getOperand(1);
6527dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (N1.getOpcode() != ISD::AND)
6528dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
6529dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6530dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // We only have to look for constant vectors here since the general, variable
6531dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // case can be handled in TableGen.
6532dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned Bits = VT.getVectorElementType().getSizeInBits();
6533dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  uint64_t BitMask = Bits == 64 ? -1ULL : ((1ULL << Bits) - 1);
6534dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  for (int i = 1; i >= 0; --i)
6535dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    for (int j = 1; j >= 0; --j) {
6536dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      BuildVectorSDNode *BVN0 = dyn_cast<BuildVectorSDNode>(N0->getOperand(i));
6537dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      BuildVectorSDNode *BVN1 = dyn_cast<BuildVectorSDNode>(N1->getOperand(j));
6538dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (!BVN0 || !BVN1)
6539dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        continue;
6540dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6541dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      bool FoundMatch = true;
6542dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      for (unsigned k = 0; k < VT.getVectorNumElements(); ++k) {
6543dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        ConstantSDNode *CN0 = dyn_cast<ConstantSDNode>(BVN0->getOperand(k));
6544dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        ConstantSDNode *CN1 = dyn_cast<ConstantSDNode>(BVN1->getOperand(k));
6545dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        if (!CN0 || !CN1 ||
6546dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines            CN0->getZExtValue() != (BitMask & ~CN1->getZExtValue())) {
6547dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          FoundMatch = false;
6548dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines          break;
6549dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        }
6550dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      }
6551dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6552dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (FoundMatch)
6553dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return DAG.getNode(AArch64ISD::BSL, DL, VT, SDValue(BVN0, 0),
6554dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                           N0->getOperand(1 - i), N1->getOperand(1 - j));
6555dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
6556dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6557dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return SDValue();
6558dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
6559dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6560dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue performORCombine(SDNode *N, TargetLowering::DAGCombinerInfo &DCI,
6561dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                const AArch64Subtarget *Subtarget) {
6562dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Attempt to form an EXTR from (or (shl VAL1, #N), (srl VAL2, #RegWidth-N))
6563dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!EnableAArch64ExtrGeneration)
6564dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
6565dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SelectionDAG &DAG = DCI.DAG;
6566dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT = N->getValueType(0);
6567dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6568dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!DAG.getTargetLoweringInfo().isTypeLegal(VT))
6569dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
6570dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6571dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Res = tryCombineToEXTR(N, DCI);
6572dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Res.getNode())
6573dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return Res;
6574dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6575dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Res = tryCombineToBSL(N, DCI);
6576dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Res.getNode())
6577dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return Res;
6578dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6579dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return SDValue();
6580dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
6581dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6582dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue performBitcastCombine(SDNode *N,
6583dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                     TargetLowering::DAGCombinerInfo &DCI,
6584dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                     SelectionDAG &DAG) {
6585dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Wait 'til after everything is legalized to try this. That way we have
6586dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // legal vector types and such.
6587dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (DCI.isBeforeLegalizeOps())
6588dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
6589dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6590dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Remove extraneous bitcasts around an extract_subvector.
6591dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // For example,
6592dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //    (v4i16 (bitconvert
6593dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //             (extract_subvector (v2i64 (bitconvert (v8i16 ...)), (i64 1)))))
6594dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //  becomes
6595dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //    (extract_subvector ((v8i16 ...), (i64 4)))
6596dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6597dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Only interested in 64-bit vectors as the ultimate result.
6598dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT = N->getValueType(0);
6599dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!VT.isVector())
6600dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
6601dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (VT.getSimpleVT().getSizeInBits() != 64)
6602dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
6603dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Is the operand an extract_subvector starting at the beginning or halfway
6604dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // point of the vector? A low half may also come through as an
6605dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // EXTRACT_SUBREG, so look for that, too.
6606dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Op0 = N->getOperand(0);
6607dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Op0->getOpcode() != ISD::EXTRACT_SUBVECTOR &&
6608dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      !(Op0->isMachineOpcode() &&
6609dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        Op0->getMachineOpcode() == AArch64::EXTRACT_SUBREG))
6610dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
6611dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  uint64_t idx = cast<ConstantSDNode>(Op0->getOperand(1))->getZExtValue();
6612dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Op0->getOpcode() == ISD::EXTRACT_SUBVECTOR) {
6613dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (Op0->getValueType(0).getVectorNumElements() != idx && idx != 0)
6614dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return SDValue();
6615dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  } else if (Op0->getMachineOpcode() == AArch64::EXTRACT_SUBREG) {
6616dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (idx != AArch64::dsub)
6617dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return SDValue();
6618dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // The dsub reference is equivalent to a lane zero subvector reference.
6619dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    idx = 0;
6620dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
6621dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Look through the bitcast of the input to the extract.
6622dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Op0->getOperand(0)->getOpcode() != ISD::BITCAST)
6623dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
6624dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Source = Op0->getOperand(0)->getOperand(0);
6625dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // If the source type has twice the number of elements as our destination
6626dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // type, we know this is an extract of the high or low half of the vector.
6627dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT SVT = Source->getValueType(0);
6628dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (SVT.getVectorNumElements() != VT.getVectorNumElements() * 2)
6629dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
6630dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6631dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  DEBUG(dbgs() << "aarch64-lower: bitcast extract_subvector simplification\n");
6632dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6633dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Create the simplified form to just extract the low or high half of the
6634dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // vector directly rather than bothering with the bitcasts.
6635dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc dl(N);
6636dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned NumElements = VT.getVectorNumElements();
6637dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (idx) {
6638dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue HalfIdx = DAG.getConstant(NumElements, MVT::i64);
6639dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT, Source, HalfIdx);
6640dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  } else {
6641dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue SubReg = DAG.getTargetConstant(AArch64::dsub, MVT::i32);
6642dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue(DAG.getMachineNode(TargetOpcode::EXTRACT_SUBREG, dl, VT,
6643dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                      Source, SubReg),
6644dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                   0);
6645dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
6646dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
6647dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6648dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue performConcatVectorsCombine(SDNode *N,
6649dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                           TargetLowering::DAGCombinerInfo &DCI,
6650dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                           SelectionDAG &DAG) {
6651dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Wait 'til after everything is legalized to try this. That way we have
6652dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // legal vector types and such.
6653dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (DCI.isBeforeLegalizeOps())
6654dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
6655dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6656dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc dl(N);
6657dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT = N->getValueType(0);
6658dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6659dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // If we see a (concat_vectors (v1x64 A), (v1x64 A)) it's really a vector
6660dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // splat. The indexed instructions are going to be expecting a DUPLANE64, so
6661dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // canonicalise to that.
6662dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (N->getOperand(0) == N->getOperand(1) && VT.getVectorNumElements() == 2) {
6663dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    assert(VT.getVectorElementType().getSizeInBits() == 64);
6664dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::DUPLANE64, dl, VT,
6665dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                       WidenVector(N->getOperand(0), DAG),
6666dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                       DAG.getConstant(0, MVT::i64));
6667dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
6668dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6669dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Canonicalise concat_vectors so that the right-hand vector has as few
6670dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // bit-casts as possible before its real operation. The primary matching
6671dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // destination for these operations will be the narrowing "2" instructions,
6672dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // which depend on the operation being performed on this right-hand vector.
6673dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // For example,
6674dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //    (concat_vectors LHS,  (v1i64 (bitconvert (v4i16 RHS))))
6675dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // becomes
6676dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //    (bitconvert (concat_vectors (v4i16 (bitconvert LHS)), RHS))
6677dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6678dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Op1 = N->getOperand(1);
6679dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Op1->getOpcode() != ISD::BITCAST)
6680dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
6681dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue RHS = Op1->getOperand(0);
6682dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  MVT RHSTy = RHS.getValueType().getSimpleVT();
6683dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // If the RHS is not a vector, this is not the pattern we're looking for.
6684dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!RHSTy.isVector())
6685dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
6686dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6687dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  DEBUG(dbgs() << "aarch64-lower: concat_vectors bitcast simplification\n");
6688dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6689dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  MVT ConcatTy = MVT::getVectorVT(RHSTy.getVectorElementType(),
6690dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  RHSTy.getVectorNumElements() * 2);
6691dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return DAG.getNode(
6692dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      ISD::BITCAST, dl, VT,
6693dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      DAG.getNode(ISD::CONCAT_VECTORS, dl, ConcatTy,
6694dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                  DAG.getNode(ISD::BITCAST, dl, RHSTy, N->getOperand(0)), RHS));
6695dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
6696dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6697dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue tryCombineFixedPointConvert(SDNode *N,
6698dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                           TargetLowering::DAGCombinerInfo &DCI,
6699dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                           SelectionDAG &DAG) {
6700dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Wait 'til after everything is legalized to try this. That way we have
6701dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // legal vector types and such.
6702dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (DCI.isBeforeLegalizeOps())
6703dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
6704dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Transform a scalar conversion of a value from a lane extract into a
6705dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // lane extract of a vector conversion. E.g., from foo1 to foo2:
6706dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // double foo1(int64x2_t a) { return vcvtd_n_f64_s64(a[1], 9); }
6707dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // double foo2(int64x2_t a) { return vcvtq_n_f64_s64(a, 9)[1]; }
6708dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //
6709dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // The second form interacts better with instruction selection and the
6710dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // register allocator to avoid cross-class register copies that aren't
6711dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // coalescable due to a lane reference.
6712dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6713dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Check the operand and see if it originates from a lane extract.
6714dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Op1 = N->getOperand(1);
6715dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Op1.getOpcode() == ISD::EXTRACT_VECTOR_ELT) {
6716dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Yep, no additional predication needed. Perform the transform.
6717dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue IID = N->getOperand(0);
6718dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue Shift = N->getOperand(2);
6719dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue Vec = Op1.getOperand(0);
6720dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue Lane = Op1.getOperand(1);
6721dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    EVT ResTy = N->getValueType(0);
6722dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    EVT VecResTy;
6723dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDLoc DL(N);
6724dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6725dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // The vector width should be 128 bits by the time we get here, even
6726dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // if it started as 64 bits (the extract_vector handling will have
6727dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // done so).
6728dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    assert(Vec.getValueType().getSizeInBits() == 128 &&
6729dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines           "unexpected vector size on extract_vector_elt!");
6730dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (Vec.getValueType() == MVT::v4i32)
6731dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      VecResTy = MVT::v4f32;
6732dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    else if (Vec.getValueType() == MVT::v2i64)
6733dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      VecResTy = MVT::v2f64;
6734dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    else
6735cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      llvm_unreachable("unexpected vector type!");
6736dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6737dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue Convert =
6738dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VecResTy, IID, Vec, Shift);
6739dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, ResTy, Convert, Lane);
6740dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
6741dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return SDValue();
6742a08063a000cfc7499f08a472d85f14e7a5e90f8dKevin Qin}
6743a08063a000cfc7499f08a472d85f14e7a5e90f8dKevin Qin
6744dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// AArch64 high-vector "long" operations are formed by performing the non-high
6745dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// version on an extract_subvector of each operand which gets the high half:
6746dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//
6747dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//  (longop2 LHS, RHS) == (longop (extract_high LHS), (extract_high RHS))
6748dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//
6749dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// However, there are cases which don't have an extract_high explicitly, but
6750dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// have another operation that can be made compatible with one for free. For
6751dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// example:
6752dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//
6753dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//  (dupv64 scalar) --> (extract_high (dup128 scalar))
6754dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//
6755dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// This routine does the actual conversion of such DUPs, once outer routines
6756dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// have determined that everything else is in order.
6757dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue tryExtendDUPToExtractHigh(SDValue N, SelectionDAG &DAG) {
6758dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // We can handle most types of duplicate, but the lane ones have an extra
6759dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // operand saying *which* lane, so we need to know.
6760dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  bool IsDUPLANE;
6761dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  switch (N.getOpcode()) {
6762dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::DUP:
6763dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    IsDUPLANE = false;
6764dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
6765dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::DUPLANE8:
6766dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::DUPLANE16:
6767dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::DUPLANE32:
6768dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::DUPLANE64:
6769dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    IsDUPLANE = true;
6770dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
6771dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  default:
6772dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
6773dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
6774dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6775dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  MVT NarrowTy = N.getSimpleValueType();
6776dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!NarrowTy.is64BitVector())
6777dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
6778dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6779dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  MVT ElementTy = NarrowTy.getVectorElementType();
6780dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned NumElems = NarrowTy.getVectorNumElements();
6781dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  MVT NewDUPVT = MVT::getVectorVT(ElementTy, NumElems * 2);
6782dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6783dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue NewDUP;
6784dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (IsDUPLANE)
6785dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    NewDUP = DAG.getNode(N.getOpcode(), SDLoc(N), NewDUPVT, N.getOperand(0),
6786dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                         N.getOperand(1));
6787dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  else
6788dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    NewDUP = DAG.getNode(AArch64ISD::DUP, SDLoc(N), NewDUPVT, N.getOperand(0));
6789dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6790dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return DAG.getNode(ISD::EXTRACT_SUBVECTOR, SDLoc(N.getNode()), NarrowTy,
6791dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                     NewDUP, DAG.getConstant(NumElems, MVT::i64));
6792dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
6793dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6794dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic bool isEssentiallyExtractSubvector(SDValue N) {
6795dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (N.getOpcode() == ISD::EXTRACT_SUBVECTOR)
6796dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return true;
6797dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6798dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return N.getOpcode() == ISD::BITCAST &&
6799dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines         N.getOperand(0).getOpcode() == ISD::EXTRACT_SUBVECTOR;
6800dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
6801dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6802dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// \brief Helper structure to keep track of ISD::SET_CC operands.
6803dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstruct GenericSetCCInfo {
6804dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  const SDValue *Opnd0;
6805dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  const SDValue *Opnd1;
6806dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  ISD::CondCode CC;
6807dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines};
6808dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6809dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// \brief Helper structure to keep track of a SET_CC lowered into AArch64 code.
6810dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstruct AArch64SetCCInfo {
6811dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  const SDValue *Cmp;
6812dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  AArch64CC::CondCode CC;
6813dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines};
6814dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6815dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// \brief Helper structure to keep track of SetCC information.
6816dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesunion SetCCInfo {
6817dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  GenericSetCCInfo Generic;
6818dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  AArch64SetCCInfo AArch64;
6819dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines};
6820dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6821dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// \brief Helper structure to be able to read SetCC information.  If set to
6822dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// true, IsAArch64 field, Info is a AArch64SetCCInfo, otherwise Info is a
6823dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// GenericSetCCInfo.
6824dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstruct SetCCInfoAndKind {
6825dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SetCCInfo Info;
6826dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  bool IsAArch64;
6827dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines};
6828dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6829dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// \brief Check whether or not \p Op is a SET_CC operation, either a generic or
6830dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// an
6831dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// AArch64 lowered one.
6832dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// \p SetCCInfo is filled accordingly.
6833dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// \post SetCCInfo is meanginfull only when this function returns true.
6834dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// \return True when Op is a kind of SET_CC operation.
6835dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic bool isSetCC(SDValue Op, SetCCInfoAndKind &SetCCInfo) {
6836dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // If this is a setcc, this is straight forward.
6837dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Op.getOpcode() == ISD::SETCC) {
6838dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SetCCInfo.Info.Generic.Opnd0 = &Op.getOperand(0);
6839dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SetCCInfo.Info.Generic.Opnd1 = &Op.getOperand(1);
6840dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SetCCInfo.Info.Generic.CC = cast<CondCodeSDNode>(Op.getOperand(2))->get();
6841dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SetCCInfo.IsAArch64 = false;
6842dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return true;
6843dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
6844dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Otherwise, check if this is a matching csel instruction.
6845dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // In other words:
6846dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // - csel 1, 0, cc
6847dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // - csel 0, 1, !cc
6848dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Op.getOpcode() != AArch64ISD::CSEL)
6849dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return false;
6850dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Set the information about the operands.
6851dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // TODO: we want the operands of the Cmp not the csel
6852dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SetCCInfo.Info.AArch64.Cmp = &Op.getOperand(3);
6853dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SetCCInfo.IsAArch64 = true;
6854dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SetCCInfo.Info.AArch64.CC = static_cast<AArch64CC::CondCode>(
6855dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      cast<ConstantSDNode>(Op.getOperand(2))->getZExtValue());
6856dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6857dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Check that the operands matches the constraints:
6858dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // (1) Both operands must be constants.
6859dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // (2) One must be 1 and the other must be 0.
6860dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  ConstantSDNode *TValue = dyn_cast<ConstantSDNode>(Op.getOperand(0));
6861dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  ConstantSDNode *FValue = dyn_cast<ConstantSDNode>(Op.getOperand(1));
6862dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6863dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Check (1).
6864dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!TValue || !FValue)
6865dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return false;
6866dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6867dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Check (2).
6868dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!TValue->isOne()) {
6869dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Update the comparison when we are interested in !cc.
6870dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    std::swap(TValue, FValue);
6871dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SetCCInfo.Info.AArch64.CC =
6872dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        AArch64CC::getInvertedCondCode(SetCCInfo.Info.AArch64.CC);
6873dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
6874dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return TValue->isOne() && FValue->isNullValue();
6875dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
6876dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6877dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// Returns true if Op is setcc or zext of setcc.
6878dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic bool isSetCCOrZExtSetCC(const SDValue& Op, SetCCInfoAndKind &Info) {
6879dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (isSetCC(Op, Info))
6880dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return true;
6881dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return ((Op.getOpcode() == ISD::ZERO_EXTEND) &&
6882dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    isSetCC(Op->getOperand(0), Info));
6883dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
6884dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6885dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// The folding we want to perform is:
6886dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// (add x, [zext] (setcc cc ...) )
6887dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//   -->
6888dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// (csel x, (add x, 1), !cc ...)
6889dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//
6890dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// The latter will get matched to a CSINC instruction.
6891dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue performSetccAddFolding(SDNode *Op, SelectionDAG &DAG) {
6892dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  assert(Op && Op->getOpcode() == ISD::ADD && "Unexpected operation!");
6893dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue LHS = Op->getOperand(0);
6894dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue RHS = Op->getOperand(1);
6895dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SetCCInfoAndKind InfoAndKind;
6896dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6897dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // If neither operand is a SET_CC, give up.
6898dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!isSetCCOrZExtSetCC(LHS, InfoAndKind)) {
6899dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    std::swap(LHS, RHS);
6900dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (!isSetCCOrZExtSetCC(LHS, InfoAndKind))
6901dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return SDValue();
6902dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
6903dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6904dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // FIXME: This could be generatized to work for FP comparisons.
6905dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT CmpVT = InfoAndKind.IsAArch64
6906dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                  ? InfoAndKind.Info.AArch64.Cmp->getOperand(0).getValueType()
6907dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                  : InfoAndKind.Info.Generic.Opnd0->getValueType();
6908dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (CmpVT != MVT::i32 && CmpVT != MVT::i64)
6909dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
6910dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6911dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue CCVal;
6912dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Cmp;
6913dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc dl(Op);
6914dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (InfoAndKind.IsAArch64) {
6915dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    CCVal = DAG.getConstant(
6916dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        AArch64CC::getInvertedCondCode(InfoAndKind.Info.AArch64.CC), MVT::i32);
6917dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Cmp = *InfoAndKind.Info.AArch64.Cmp;
6918dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  } else
6919dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Cmp = getAArch64Cmp(*InfoAndKind.Info.Generic.Opnd0,
6920dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                      *InfoAndKind.Info.Generic.Opnd1,
6921dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                      ISD::getSetCCInverse(InfoAndKind.Info.Generic.CC, true),
6922dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                      CCVal, DAG, dl);
6923dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6924dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT = Op->getValueType(0);
6925dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  LHS = DAG.getNode(ISD::ADD, dl, VT, RHS, DAG.getConstant(1, VT));
6926dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return DAG.getNode(AArch64ISD::CSEL, dl, VT, RHS, LHS, CCVal, Cmp);
6927dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
6928dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6929dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// The basic add/sub long vector instructions have variants with "2" on the end
6930dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// which act on the high-half of their inputs. They are normally matched by
6931dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// patterns like:
6932dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//
6933dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// (add (zeroext (extract_high LHS)),
6934dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//      (zeroext (extract_high RHS)))
6935dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// -> uaddl2 vD, vN, vM
6936dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//
6937dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// However, if one of the extracts is something like a duplicate, this
6938dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// instruction can still be used profitably. This function puts the DAG into a
6939dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// more appropriate form for those patterns to trigger.
6940dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue performAddSubLongCombine(SDNode *N,
6941dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                        TargetLowering::DAGCombinerInfo &DCI,
6942dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                        SelectionDAG &DAG) {
6943dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (DCI.isBeforeLegalizeOps())
6944dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
6945dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6946dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  MVT VT = N->getSimpleValueType(0);
6947dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!VT.is128BitVector()) {
6948dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (N->getOpcode() == ISD::ADD)
6949dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return performSetccAddFolding(N, DAG);
6950dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
6951dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
6952dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6953dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Make sure both branches are extended in the same way.
6954dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue LHS = N->getOperand(0);
6955dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue RHS = N->getOperand(1);
6956dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if ((LHS.getOpcode() != ISD::ZERO_EXTEND &&
6957dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines       LHS.getOpcode() != ISD::SIGN_EXTEND) ||
6958dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      LHS.getOpcode() != RHS.getOpcode())
6959dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
6960dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6961dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned ExtType = LHS.getOpcode();
6962dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6963dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // It's not worth doing if at least one of the inputs isn't already an
6964dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // extract, but we don't know which it'll be so we have to try both.
6965dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (isEssentiallyExtractSubvector(LHS.getOperand(0))) {
6966dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    RHS = tryExtendDUPToExtractHigh(RHS.getOperand(0), DAG);
6967dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (!RHS.getNode())
6968dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return SDValue();
6969dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6970dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    RHS = DAG.getNode(ExtType, SDLoc(N), VT, RHS);
6971dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  } else if (isEssentiallyExtractSubvector(RHS.getOperand(0))) {
6972dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    LHS = tryExtendDUPToExtractHigh(LHS.getOperand(0), DAG);
6973dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (!LHS.getNode())
6974dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return SDValue();
6975dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6976dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    LHS = DAG.getNode(ExtType, SDLoc(N), VT, LHS);
6977dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
6978dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6979dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return DAG.getNode(N->getOpcode(), SDLoc(N), VT, LHS, RHS);
6980dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
6981dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6982dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// Massage DAGs which we can use the high-half "long" operations on into
6983dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// something isel will recognize better. E.g.
6984dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//
6985dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// (aarch64_neon_umull (extract_high vec) (dupv64 scalar)) -->
6986dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//   (aarch64_neon_umull (extract_high (v2i64 vec)))
6987dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//                     (extract_high (v2i64 (dup128 scalar)))))
6988dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//
6989dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue tryCombineLongOpWithDup(unsigned IID, SDNode *N,
6990dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                       TargetLowering::DAGCombinerInfo &DCI,
6991dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                       SelectionDAG &DAG) {
6992dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (DCI.isBeforeLegalizeOps())
6993dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
6994dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
6995dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue LHS = N->getOperand(1);
6996dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue RHS = N->getOperand(2);
6997dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  assert(LHS.getValueType().is64BitVector() &&
6998dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines         RHS.getValueType().is64BitVector() &&
6999dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines         "unexpected shape for long operation");
7000dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7001dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Either node could be a DUP, but it's not worth doing both of them (you'd
7002dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // just as well use the non-high version) so look for a corresponding extract
7003dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // operation on the other "wing".
7004dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (isEssentiallyExtractSubvector(LHS)) {
7005dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    RHS = tryExtendDUPToExtractHigh(RHS, DAG);
7006dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (!RHS.getNode())
7007dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return SDValue();
7008dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  } else if (isEssentiallyExtractSubvector(RHS)) {
7009dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    LHS = tryExtendDUPToExtractHigh(LHS, DAG);
7010dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (!LHS.getNode())
7011dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return SDValue();
7012dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
7013dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7014dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, SDLoc(N), N->getValueType(0),
7015dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                     N->getOperand(0), LHS, RHS);
7016dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
7017dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7018dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue tryCombineShiftImm(unsigned IID, SDNode *N, SelectionDAG &DAG) {
7019dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  MVT ElemTy = N->getSimpleValueType(0).getScalarType();
7020dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned ElemBits = ElemTy.getSizeInBits();
7021dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7022dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  int64_t ShiftAmount;
7023dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (BuildVectorSDNode *BVN = dyn_cast<BuildVectorSDNode>(N->getOperand(2))) {
7024dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    APInt SplatValue, SplatUndef;
7025dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned SplatBitSize;
7026dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    bool HasAnyUndefs;
7027dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (!BVN->isConstantSplat(SplatValue, SplatUndef, SplatBitSize,
7028dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                              HasAnyUndefs, ElemBits) ||
7029dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        SplatBitSize != ElemBits)
7030dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return SDValue();
7031dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7032dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    ShiftAmount = SplatValue.getSExtValue();
7033dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  } else if (ConstantSDNode *CVN = dyn_cast<ConstantSDNode>(N->getOperand(2))) {
7034dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    ShiftAmount = CVN->getSExtValue();
7035dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  } else
7036dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
7037dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7038dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned Opcode;
7039dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  bool IsRightShift;
7040dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  switch (IID) {
7041dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  default:
7042dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    llvm_unreachable("Unknown shift intrinsic");
7043dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_neon_sqshl:
7044dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Opcode = AArch64ISD::SQSHL_I;
7045dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    IsRightShift = false;
7046dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
7047dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_neon_uqshl:
7048dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Opcode = AArch64ISD::UQSHL_I;
7049dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    IsRightShift = false;
7050dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
7051dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_neon_srshl:
7052dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Opcode = AArch64ISD::SRSHR_I;
7053dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    IsRightShift = true;
7054dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
7055dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_neon_urshl:
7056dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Opcode = AArch64ISD::URSHR_I;
7057dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    IsRightShift = true;
7058dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
7059dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_neon_sqshlu:
7060dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Opcode = AArch64ISD::SQSHLU_I;
7061dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    IsRightShift = false;
7062dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
7063dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
7064dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7065dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (IsRightShift && ShiftAmount <= -1 && ShiftAmount >= -(int)ElemBits)
7066dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(Opcode, SDLoc(N), N->getValueType(0), N->getOperand(1),
7067dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                       DAG.getConstant(-ShiftAmount, MVT::i32));
7068cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines  else if (!IsRightShift && ShiftAmount >= 0 && ShiftAmount < ElemBits)
7069dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(Opcode, SDLoc(N), N->getValueType(0), N->getOperand(1),
7070dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                       DAG.getConstant(ShiftAmount, MVT::i32));
7071dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7072dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return SDValue();
7073dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
7074dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7075dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// The CRC32[BH] instructions ignore the high bits of their data operand. Since
7076dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// the intrinsics must be legal and take an i32, this means there's almost
7077dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// certainly going to be a zext in the DAG which we can eliminate.
7078dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue tryCombineCRC32(unsigned Mask, SDNode *N, SelectionDAG &DAG) {
7079dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue AndN = N->getOperand(2);
7080dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (AndN.getOpcode() != ISD::AND)
7081dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
7082dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7083dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  ConstantSDNode *CMask = dyn_cast<ConstantSDNode>(AndN.getOperand(1));
7084dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!CMask || CMask->getZExtValue() != Mask)
7085dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
7086dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7087dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, SDLoc(N), MVT::i32,
7088dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                     N->getOperand(0), N->getOperand(1), AndN.getOperand(0));
7089dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
7090dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7091dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue performIntrinsicCombine(SDNode *N,
7092dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                       TargetLowering::DAGCombinerInfo &DCI,
7093dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                       const AArch64Subtarget *Subtarget) {
7094dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SelectionDAG &DAG = DCI.DAG;
7095dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned IID = getIntrinsicID(N);
7096dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  switch (IID) {
7097dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  default:
7098dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
7099dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_neon_vcvtfxs2fp:
7100dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_neon_vcvtfxu2fp:
7101dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return tryCombineFixedPointConvert(N, DCI, DAG);
7102dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
7103dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_neon_fmax:
7104dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::FMAX, SDLoc(N), N->getValueType(0),
7105dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                       N->getOperand(1), N->getOperand(2));
7106dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_neon_fmin:
7107dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return DAG.getNode(AArch64ISD::FMIN, SDLoc(N), N->getValueType(0),
7108dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                       N->getOperand(1), N->getOperand(2));
7109dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_neon_smull:
7110dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_neon_umull:
7111dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_neon_pmull:
7112dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_neon_sqdmull:
7113dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return tryCombineLongOpWithDup(IID, N, DCI, DAG);
7114dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_neon_sqshl:
7115dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_neon_uqshl:
7116dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_neon_sqshlu:
7117dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_neon_srshl:
7118dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_neon_urshl:
7119dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return tryCombineShiftImm(IID, N, DAG);
7120dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_crc32b:
7121dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_crc32cb:
7122dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return tryCombineCRC32(0xff, N, DAG);
7123dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_crc32h:
7124dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case Intrinsic::aarch64_crc32ch:
7125dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return tryCombineCRC32(0xffff, N, DAG);
7126dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
7127dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return SDValue();
7128dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
7129dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7130dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue performExtendCombine(SDNode *N,
7131dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                    TargetLowering::DAGCombinerInfo &DCI,
7132dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                    SelectionDAG &DAG) {
7133dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // If we see something like (zext (sabd (extract_high ...), (DUP ...))) then
7134dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // we can convert that DUP into another extract_high (of a bigger DUP), which
7135dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // helps the backend to decide that an sabdl2 would be useful, saving a real
7136dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // extract_high operation.
7137dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!DCI.isBeforeLegalizeOps() && N->getOpcode() == ISD::ZERO_EXTEND &&
7138dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      N->getOperand(0).getOpcode() == ISD::INTRINSIC_WO_CHAIN) {
7139dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDNode *ABDNode = N->getOperand(0).getNode();
7140dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned IID = getIntrinsicID(ABDNode);
7141dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (IID == Intrinsic::aarch64_neon_sabd ||
7142dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        IID == Intrinsic::aarch64_neon_uabd) {
7143dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      SDValue NewABD = tryCombineLongOpWithDup(IID, ABDNode, DCI, DAG);
7144dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (!NewABD.getNode())
7145dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        return SDValue();
7146dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7147dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return DAG.getNode(ISD::ZERO_EXTEND, SDLoc(N), N->getValueType(0),
7148dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                         NewABD);
7149dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
7150dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
7151dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7152dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // This is effectively a custom type legalization for AArch64.
7153dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //
7154dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Type legalization will split an extend of a small, legal, type to a larger
7155dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // illegal type by first splitting the destination type, often creating
7156dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // illegal source types, which then get legalized in isel-confusing ways,
7157dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // leading to really terrible codegen. E.g.,
7158dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //   %result = v8i32 sext v8i8 %value
7159dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // becomes
7160dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //   %losrc = extract_subreg %value, ...
7161dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //   %hisrc = extract_subreg %value, ...
7162dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //   %lo = v4i32 sext v4i8 %losrc
7163dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //   %hi = v4i32 sext v4i8 %hisrc
7164dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Things go rapidly downhill from there.
7165dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //
7166dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // For AArch64, the [sz]ext vector instructions can only go up one element
7167dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // size, so we can, e.g., extend from i8 to i16, but to go from i8 to i32
7168dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // take two instructions.
7169dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  //
7170dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // This implies that the most efficient way to do the extend from v8i8
7171dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // to two v4i32 values is to first extend the v8i8 to v8i16, then do
7172dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // the normal splitting to happen for the v8i16->v8i32.
7173dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7174dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // This is pre-legalization to catch some cases where the default
7175dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // type legalization will create ill-tempered code.
7176dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!DCI.isBeforeLegalizeOps())
7177dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
7178dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7179dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // We're only interested in cleaning things up for non-legal vector types
7180dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // here. If both the source and destination are legal, things will just
7181dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // work naturally without any fiddling.
7182dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  const TargetLowering &TLI = DAG.getTargetLoweringInfo();
7183dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT ResVT = N->getValueType(0);
7184dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!ResVT.isVector() || TLI.isTypeLegal(ResVT))
7185dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
7186dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // If the vector type isn't a simple VT, it's beyond the scope of what
7187dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // we're  worried about here. Let legalization do its thing and hope for
7188dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // the best.
7189dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!ResVT.isSimple())
7190dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
7191dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7192dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Src = N->getOperand(0);
7193dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  MVT SrcVT = Src->getValueType(0).getSimpleVT();
7194dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // If the source VT is a 64-bit vector, we can play games and get the
7195dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // better results we want.
7196dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (SrcVT.getSizeInBits() != 64)
7197dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
7198dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7199dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned SrcEltSize = SrcVT.getVectorElementType().getSizeInBits();
7200dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned ElementCount = SrcVT.getVectorNumElements();
7201dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SrcVT = MVT::getVectorVT(MVT::getIntegerVT(SrcEltSize * 2), ElementCount);
7202dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc DL(N);
7203dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Src = DAG.getNode(N->getOpcode(), DL, SrcVT, Src);
7204dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7205dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Now split the rest of the operation into two halves, each with a 64
7206dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // bit source.
7207dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT LoVT, HiVT;
7208dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Lo, Hi;
7209dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned NumElements = ResVT.getVectorNumElements();
7210dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  assert(!(NumElements & 1) && "Splitting vector, but not in half!");
7211dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  LoVT = HiVT = EVT::getVectorVT(*DAG.getContext(),
7212dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                 ResVT.getVectorElementType(), NumElements / 2);
7213dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7214dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT InNVT = EVT::getVectorVT(*DAG.getContext(), SrcVT.getVectorElementType(),
7215dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                               LoVT.getVectorNumElements());
7216dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Lo = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, InNVT, Src,
7217dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                   DAG.getIntPtrConstant(0));
7218dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Hi = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, InNVT, Src,
7219dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                   DAG.getIntPtrConstant(InNVT.getVectorNumElements()));
7220dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Lo = DAG.getNode(N->getOpcode(), DL, LoVT, Lo);
7221dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Hi = DAG.getNode(N->getOpcode(), DL, HiVT, Hi);
7222dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7223dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Now combine the parts back together so we still have a single result
7224dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // like the combiner expects.
7225dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return DAG.getNode(ISD::CONCAT_VECTORS, DL, ResVT, Lo, Hi);
7226dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
7227dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7228dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// Replace a splat of a scalar to a vector store by scalar stores of the scalar
7229dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// value. The load store optimizer pass will merge them to store pair stores.
7230dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// This has better performance than a splat of the scalar followed by a split
7231dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// vector store. Even if the stores are not merged it is four stores vs a dup,
7232dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// followed by an ext.b and two stores.
7233dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue replaceSplatVectorStore(SelectionDAG &DAG, StoreSDNode *St) {
7234dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue StVal = St->getValue();
7235dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT = StVal.getValueType();
7236dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7237dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Don't replace floating point stores, they possibly won't be transformed to
7238dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // stp because of the store pair suppress pass.
7239dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (VT.isFloatingPoint())
7240dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
7241dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7242dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Check for insert vector elements.
7243dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (StVal.getOpcode() != ISD::INSERT_VECTOR_ELT)
7244dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
7245dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7246dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // We can express a splat as store pair(s) for 2 or 4 elements.
7247dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned NumVecElts = VT.getVectorNumElements();
7248dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (NumVecElts != 4 && NumVecElts != 2)
7249dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
7250dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue SplatVal = StVal.getOperand(1);
7251dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned RemainInsertElts = NumVecElts - 1;
7252dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7253dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Check that this is a splat.
7254dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  while (--RemainInsertElts) {
7255dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue NextInsertElt = StVal.getOperand(0);
7256dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (NextInsertElt.getOpcode() != ISD::INSERT_VECTOR_ELT)
7257dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return SDValue();
7258dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (NextInsertElt.getOperand(1) != SplatVal)
7259dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return SDValue();
7260dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    StVal = NextInsertElt;
7261dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
7262dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned OrigAlignment = St->getAlignment();
7263dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned EltOffset = NumVecElts == 4 ? 4 : 8;
7264dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned Alignment = std::min(OrigAlignment, EltOffset);
7265dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7266dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Create scalar stores. This is at least as good as the code sequence for a
7267dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // split unaligned store wich is a dup.s, ext.b, and two stores.
7268dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Most of the time the three stores should be replaced by store pair
7269dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // instructions (stp).
7270dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc DL(St);
7271dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue BasePtr = St->getBasePtr();
7272dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue NewST1 =
7273dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      DAG.getStore(St->getChain(), DL, SplatVal, BasePtr, St->getPointerInfo(),
7274dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                   St->isVolatile(), St->isNonTemporal(), St->getAlignment());
7275dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7276dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned Offset = EltOffset;
7277dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  while (--NumVecElts) {
7278dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue OffsetPtr = DAG.getNode(ISD::ADD, DL, MVT::i64, BasePtr,
7279dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                    DAG.getConstant(Offset, MVT::i64));
7280dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    NewST1 = DAG.getStore(NewST1.getValue(0), DL, SplatVal, OffsetPtr,
7281dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                          St->getPointerInfo(), St->isVolatile(),
7282dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                          St->isNonTemporal(), Alignment);
7283dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Offset += EltOffset;
7284dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
7285dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return NewST1;
7286dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
7287dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7288dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue performSTORECombine(SDNode *N,
7289dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                   TargetLowering::DAGCombinerInfo &DCI,
7290dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                   SelectionDAG &DAG,
7291dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                   const AArch64Subtarget *Subtarget) {
7292dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!DCI.isBeforeLegalize())
7293dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
7294dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7295dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  StoreSDNode *S = cast<StoreSDNode>(N);
7296dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (S->isVolatile())
7297dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
7298dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7299dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Cyclone has bad performance on unaligned 16B stores when crossing line and
7300dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // page boundries. We want to split such stores.
7301dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!Subtarget->isCyclone())
7302dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
7303dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7304dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Don't split at Oz.
7305dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  MachineFunction &MF = DAG.getMachineFunction();
7306dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  bool IsMinSize = MF.getFunction()->getAttributes().hasAttribute(
7307dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      AttributeSet::FunctionIndex, Attribute::MinSize);
7308dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (IsMinSize)
7309dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
7310dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7311dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue StVal = S->getValue();
7312dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT = StVal.getValueType();
7313dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7314dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Don't split v2i64 vectors. Memcpy lowering produces those and splitting
7315dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // those up regresses performance on micro-benchmarks and olden/bh.
7316dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!VT.isVector() || VT.getVectorNumElements() < 2 || VT == MVT::v2i64)
7317dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
7318dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7319dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Split unaligned 16B stores. They are terrible for performance.
7320dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Don't split stores with alignment of 1 or 2. Code that uses clang vector
7321dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // extensions can use this to mark that it does not want splitting to happen
7322dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // (by underspecifying alignment to be 1 or 2). Furthermore, the chance of
7323dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // eliminating alignment hazards is only 1 in 8 for alignment of 2.
7324dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (VT.getSizeInBits() != 128 || S->getAlignment() >= 16 ||
7325dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      S->getAlignment() <= 2)
7326dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
7327dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7328dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // If we get a splat of a scalar convert this vector store to a store of
7329dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // scalars. They will be merged into store pairs thereby removing two
7330dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // instructions.
7331dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue ReplacedSplat = replaceSplatVectorStore(DAG, S);
7332dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (ReplacedSplat != SDValue())
7333dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return ReplacedSplat;
7334dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7335dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc DL(S);
7336dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned NumElts = VT.getVectorNumElements() / 2;
7337dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Split VT into two.
7338dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT HalfVT =
7339dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      EVT::getVectorVT(*DAG.getContext(), VT.getVectorElementType(), NumElts);
7340dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue SubVector0 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, HalfVT, StVal,
7341dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                   DAG.getIntPtrConstant(0));
7342dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue SubVector1 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, HalfVT, StVal,
7343dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                   DAG.getIntPtrConstant(NumElts));
7344dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue BasePtr = S->getBasePtr();
7345dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue NewST1 =
7346dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      DAG.getStore(S->getChain(), DL, SubVector0, BasePtr, S->getPointerInfo(),
7347dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                   S->isVolatile(), S->isNonTemporal(), S->getAlignment());
7348dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue OffsetPtr = DAG.getNode(ISD::ADD, DL, MVT::i64, BasePtr,
7349dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                  DAG.getConstant(8, MVT::i64));
7350dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return DAG.getStore(NewST1.getValue(0), DL, SubVector1, OffsetPtr,
7351dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                      S->getPointerInfo(), S->isVolatile(), S->isNonTemporal(),
7352dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                      S->getAlignment());
7353dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
7354dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7355dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// Target-specific DAG combine function for post-increment LD1 (lane) and
7356dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// post-increment LD1R.
7357dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue performPostLD1Combine(SDNode *N,
7358dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                     TargetLowering::DAGCombinerInfo &DCI,
7359dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                     bool IsLaneOp) {
7360dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (DCI.isBeforeLegalizeOps())
7361dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
7362dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7363dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SelectionDAG &DAG = DCI.DAG;
7364dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT = N->getValueType(0);
7365dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7366dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned LoadIdx = IsLaneOp ? 1 : 0;
7367dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDNode *LD = N->getOperand(LoadIdx).getNode();
7368dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // If it is not LOAD, can not do such combine.
7369dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (LD->getOpcode() != ISD::LOAD)
7370dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
7371dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7372dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  LoadSDNode *LoadSDN = cast<LoadSDNode>(LD);
7373dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT MemVT = LoadSDN->getMemoryVT();
7374dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Check if memory operand is the same type as the vector element.
7375dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (MemVT != VT.getVectorElementType())
7376dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
7377dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7378dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Check if there are other uses. If so, do not combine as it will introduce
7379dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // an extra load.
7380dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  for (SDNode::use_iterator UI = LD->use_begin(), UE = LD->use_end(); UI != UE;
7381dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines       ++UI) {
7382dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (UI.getUse().getResNo() == 1) // Ignore uses of the chain result.
7383dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      continue;
7384dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (*UI != N)
7385dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return SDValue();
7386dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
7387dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7388dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Addr = LD->getOperand(1);
7389dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Vector = N->getOperand(0);
7390dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Search for a use of the address operand that is an increment.
7391dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  for (SDNode::use_iterator UI = Addr.getNode()->use_begin(), UE =
7392dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines       Addr.getNode()->use_end(); UI != UE; ++UI) {
7393dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDNode *User = *UI;
7394dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (User->getOpcode() != ISD::ADD
7395dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        || UI.getUse().getResNo() != Addr.getResNo())
7396dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      continue;
7397dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7398dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Check that the add is independent of the load.  Otherwise, folding it
7399dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // would create a cycle.
7400dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (User->isPredecessorOf(LD) || LD->isPredecessorOf(User))
7401dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      continue;
7402dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Also check that add is not used in the vector operand.  This would also
7403dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // create a cycle.
7404dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (User->isPredecessorOf(Vector.getNode()))
7405dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      continue;
74068a0ff1f236e77214878c9d493e786b30656ad2a1Bill Wendling
7407dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // If the increment is a constant, it must match the memory ref size.
7408dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue Inc = User->getOperand(User->getOperand(0) == Addr ? 1 : 0);
7409dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (ConstantSDNode *CInc = dyn_cast<ConstantSDNode>(Inc.getNode())) {
7410dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      uint32_t IncVal = CInc->getZExtValue();
7411dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      unsigned NumBytes = VT.getScalarSizeInBits() / 8;
7412dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (IncVal != NumBytes)
7413dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        continue;
7414dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Inc = DAG.getRegister(AArch64::XZR, MVT::i64);
7415dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
7416dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7417dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SmallVector<SDValue, 8> Ops;
7418dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Ops.push_back(LD->getOperand(0));  // Chain
7419dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (IsLaneOp) {
7420dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Ops.push_back(Vector);           // The vector to be inserted
7421dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Ops.push_back(N->getOperand(2)); // The lane to be inserted in the vector
7422dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
7423dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Ops.push_back(Addr);
7424dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Ops.push_back(Inc);
7425dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7426dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    EVT Tys[3] = { VT, MVT::i64, MVT::Other };
7427dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDVTList SDTys = DAG.getVTList(ArrayRef<EVT>(Tys, 3));
7428dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned NewOp = IsLaneOp ? AArch64ISD::LD1LANEpost : AArch64ISD::LD1DUPpost;
7429dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue UpdN = DAG.getMemIntrinsicNode(NewOp, SDLoc(N), SDTys, Ops,
7430dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                           MemVT,
7431dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                           LoadSDN->getMemOperand());
7432dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7433dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Update the uses.
7434dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    std::vector<SDValue> NewResults;
7435dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    NewResults.push_back(SDValue(LD, 0));             // The result of load
7436dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    NewResults.push_back(SDValue(UpdN.getNode(), 2)); // Chain
7437dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    DCI.CombineTo(LD, NewResults);
7438dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    DCI.CombineTo(N, SDValue(UpdN.getNode(), 0));     // Dup/Inserted Result
7439dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    DCI.CombineTo(User, SDValue(UpdN.getNode(), 1));  // Write back register
7440dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7441dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
7442dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
7443dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return SDValue();
7444dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
7445dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7446dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// Target-specific DAG combine function for NEON load/store intrinsics
7447dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// to merge base address updates.
7448dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue performNEONPostLDSTCombine(SDNode *N,
7449dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                          TargetLowering::DAGCombinerInfo &DCI,
7450dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                          SelectionDAG &DAG) {
7451dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (DCI.isBeforeLegalize() || DCI.isCalledByLegalizer())
7452dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
7453dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7454dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned AddrOpIdx = N->getNumOperands() - 1;
7455dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Addr = N->getOperand(AddrOpIdx);
7456dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7457dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Search for a use of the address operand that is an increment.
7458dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  for (SDNode::use_iterator UI = Addr.getNode()->use_begin(),
7459dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines       UE = Addr.getNode()->use_end(); UI != UE; ++UI) {
7460dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDNode *User = *UI;
7461dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (User->getOpcode() != ISD::ADD ||
7462dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        UI.getUse().getResNo() != Addr.getResNo())
7463dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      continue;
7464dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7465dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Check that the add is independent of the load/store.  Otherwise, folding
7466dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // it would create a cycle.
7467dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (User->isPredecessorOf(N) || N->isPredecessorOf(User))
7468dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      continue;
7469dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7470dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Find the new opcode for the updating load/store.
7471dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    bool IsStore = false;
7472dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    bool IsLaneOp = false;
7473dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    bool IsDupOp = false;
7474dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned NewOpc = 0;
7475dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned NumVecs = 0;
7476dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned IntNo = cast<ConstantSDNode>(N->getOperand(1))->getZExtValue();
7477dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    switch (IntNo) {
7478dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    default: llvm_unreachable("unexpected intrinsic for Neon base update");
7479dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_ld2:       NewOpc = AArch64ISD::LD2post;
7480dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      NumVecs = 2; break;
7481dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_ld3:       NewOpc = AArch64ISD::LD3post;
7482dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      NumVecs = 3; break;
7483dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_ld4:       NewOpc = AArch64ISD::LD4post;
7484dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      NumVecs = 4; break;
7485dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_st2:       NewOpc = AArch64ISD::ST2post;
7486dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      NumVecs = 2; IsStore = true; break;
7487dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_st3:       NewOpc = AArch64ISD::ST3post;
7488dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      NumVecs = 3; IsStore = true; break;
7489dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_st4:       NewOpc = AArch64ISD::ST4post;
7490dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      NumVecs = 4; IsStore = true; break;
7491dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_ld1x2:     NewOpc = AArch64ISD::LD1x2post;
7492dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      NumVecs = 2; break;
7493dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_ld1x3:     NewOpc = AArch64ISD::LD1x3post;
7494dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      NumVecs = 3; break;
7495dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_ld1x4:     NewOpc = AArch64ISD::LD1x4post;
7496dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      NumVecs = 4; break;
7497dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_st1x2:     NewOpc = AArch64ISD::ST1x2post;
7498dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      NumVecs = 2; IsStore = true; break;
7499dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_st1x3:     NewOpc = AArch64ISD::ST1x3post;
7500dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      NumVecs = 3; IsStore = true; break;
7501dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_st1x4:     NewOpc = AArch64ISD::ST1x4post;
7502dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      NumVecs = 4; IsStore = true; break;
7503dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_ld2r:      NewOpc = AArch64ISD::LD2DUPpost;
7504dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      NumVecs = 2; IsDupOp = true; break;
7505dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_ld3r:      NewOpc = AArch64ISD::LD3DUPpost;
7506dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      NumVecs = 3; IsDupOp = true; break;
7507dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_ld4r:      NewOpc = AArch64ISD::LD4DUPpost;
7508dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      NumVecs = 4; IsDupOp = true; break;
7509dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_ld2lane:   NewOpc = AArch64ISD::LD2LANEpost;
7510dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      NumVecs = 2; IsLaneOp = true; break;
7511dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_ld3lane:   NewOpc = AArch64ISD::LD3LANEpost;
7512dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      NumVecs = 3; IsLaneOp = true; break;
7513dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_ld4lane:   NewOpc = AArch64ISD::LD4LANEpost;
7514dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      NumVecs = 4; IsLaneOp = true; break;
7515dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_st2lane:   NewOpc = AArch64ISD::ST2LANEpost;
7516dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      NumVecs = 2; IsStore = true; IsLaneOp = true; break;
7517dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_st3lane:   NewOpc = AArch64ISD::ST3LANEpost;
7518dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      NumVecs = 3; IsStore = true; IsLaneOp = true; break;
7519dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_st4lane:   NewOpc = AArch64ISD::ST4LANEpost;
7520dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      NumVecs = 4; IsStore = true; IsLaneOp = true; break;
7521dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
7522dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7523dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    EVT VecTy;
7524dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (IsStore)
7525dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      VecTy = N->getOperand(2).getValueType();
7526dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    else
7527dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      VecTy = N->getValueType(0);
7528dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7529dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // If the increment is a constant, it must match the memory ref size.
7530dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue Inc = User->getOperand(User->getOperand(0) == Addr ? 1 : 0);
7531dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (ConstantSDNode *CInc = dyn_cast<ConstantSDNode>(Inc.getNode())) {
7532dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      uint32_t IncVal = CInc->getZExtValue();
7533dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      unsigned NumBytes = NumVecs * VecTy.getSizeInBits() / 8;
7534dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (IsLaneOp || IsDupOp)
7535dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        NumBytes /= VecTy.getVectorNumElements();
7536dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      if (IncVal != NumBytes)
7537dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        continue;
7538dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Inc = DAG.getRegister(AArch64::XZR, MVT::i64);
7539dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    }
7540dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SmallVector<SDValue, 8> Ops;
7541dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Ops.push_back(N->getOperand(0)); // Incoming chain
7542dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Load lane and store have vector list as input.
7543dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (IsLaneOp || IsStore)
7544dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      for (unsigned i = 2; i < AddrOpIdx; ++i)
7545dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        Ops.push_back(N->getOperand(i));
7546dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Ops.push_back(Addr); // Base register
7547dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Ops.push_back(Inc);
7548dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7549dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Return Types.
7550dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    EVT Tys[6];
7551dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned NumResultVecs = (IsStore ? 0 : NumVecs);
7552dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    unsigned n;
7553dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    for (n = 0; n < NumResultVecs; ++n)
7554dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Tys[n] = VecTy;
7555dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Tys[n++] = MVT::i64;  // Type of write back register
7556dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Tys[n] = MVT::Other;  // Type of the chain
7557dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDVTList SDTys = DAG.getVTList(ArrayRef<EVT>(Tys, NumResultVecs + 2));
75588a0ff1f236e77214878c9d493e786b30656ad2a1Bill Wendling
7559dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    MemIntrinsicSDNode *MemInt = cast<MemIntrinsicSDNode>(N);
7560dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDValue UpdN = DAG.getMemIntrinsicNode(NewOpc, SDLoc(N), SDTys, Ops,
7561dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                           MemInt->getMemoryVT(),
7562dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                           MemInt->getMemOperand());
75638a0ff1f236e77214878c9d493e786b30656ad2a1Bill Wendling
7564dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Update the uses.
7565dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    std::vector<SDValue> NewResults;
7566dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    for (unsigned i = 0; i < NumResultVecs; ++i) {
7567dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      NewResults.push_back(SDValue(UpdN.getNode(), i));
75688a0ff1f236e77214878c9d493e786b30656ad2a1Bill Wendling    }
7569dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    NewResults.push_back(SDValue(UpdN.getNode(), NumResultVecs + 1));
7570dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    DCI.CombineTo(N, NewResults);
7571dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    DCI.CombineTo(User, SDValue(UpdN.getNode(), NumResultVecs));
75728a0ff1f236e77214878c9d493e786b30656ad2a1Bill Wendling
7573dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
75748a0ff1f236e77214878c9d493e786b30656ad2a1Bill Wendling  }
7575dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return SDValue();
7576dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
75778a0ff1f236e77214878c9d493e786b30656ad2a1Bill Wendling
7578dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// Optimize compare with zero and branch.
7579dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue performBRCONDCombine(SDNode *N,
7580dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                    TargetLowering::DAGCombinerInfo &DCI,
7581dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                    SelectionDAG &DAG) {
7582dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Chain = N->getOperand(0);
7583dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Dest = N->getOperand(1);
7584dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue CCVal = N->getOperand(2);
7585dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Cmp = N->getOperand(3);
7586dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7587dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  assert(isa<ConstantSDNode>(CCVal) && "Expected a ConstantSDNode here!");
7588dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned CC = cast<ConstantSDNode>(CCVal)->getZExtValue();
7589dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (CC != AArch64CC::EQ && CC != AArch64CC::NE)
7590dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
75918a0ff1f236e77214878c9d493e786b30656ad2a1Bill Wendling
7592dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  unsigned CmpOpc = Cmp.getOpcode();
7593dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (CmpOpc != AArch64ISD::ADDS && CmpOpc != AArch64ISD::SUBS)
7594dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
75958a0ff1f236e77214878c9d493e786b30656ad2a1Bill Wendling
7596dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Only attempt folding if there is only one use of the flag and no use of the
7597dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // value.
7598dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!Cmp->hasNUsesOfValue(0, 0) || !Cmp->hasNUsesOfValue(1, 1))
7599dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
76008a0ff1f236e77214878c9d493e786b30656ad2a1Bill Wendling
7601dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue LHS = Cmp.getOperand(0);
7602dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue RHS = Cmp.getOperand(1);
76038a0ff1f236e77214878c9d493e786b30656ad2a1Bill Wendling
7604dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  assert(LHS.getValueType() == RHS.getValueType() &&
7605dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines         "Expected the value type to be the same for both operands!");
7606dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (LHS.getValueType() != MVT::i32 && LHS.getValueType() != MVT::i64)
7607dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
7608dd518bcc9dd9e4028b2a979ced09edd5b6becd07Jiangning Liu
7609dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (isa<ConstantSDNode>(LHS) && cast<ConstantSDNode>(LHS)->isNullValue())
7610dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    std::swap(LHS, RHS);
7611dd518bcc9dd9e4028b2a979ced09edd5b6becd07Jiangning Liu
7612dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!isa<ConstantSDNode>(RHS) || !cast<ConstantSDNode>(RHS)->isNullValue())
7613258115258f8fe15e9d74b5fb524f90b75bb917d1Jiangning Liu    return SDValue();
7614258115258f8fe15e9d74b5fb524f90b75bb917d1Jiangning Liu
7615dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (LHS.getOpcode() == ISD::SHL || LHS.getOpcode() == ISD::SRA ||
7616dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      LHS.getOpcode() == ISD::SRL)
7617dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
7618a08063a000cfc7499f08a472d85f14e7a5e90f8dKevin Qin
7619dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Fold the compare into the branch instruction.
7620dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue BR;
7621dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (CC == AArch64CC::EQ)
7622dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    BR = DAG.getNode(AArch64ISD::CBZ, SDLoc(N), MVT::Other, Chain, LHS, Dest);
762336b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines  else
7624dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    BR = DAG.getNode(AArch64ISD::CBNZ, SDLoc(N), MVT::Other, Chain, LHS, Dest);
762536b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
7626dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Do not add new nodes to DAG combiner worklist.
7627dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  DCI.CombineTo(N, BR, false);
762836b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines
7629dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return SDValue();
7630dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
76318a0ff1f236e77214878c9d493e786b30656ad2a1Bill Wendling
7632dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// vselect (v1i1 setcc) ->
7633dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines//     vselect (v1iXX setcc)  (XX is the size of the compared operand type)
7634dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// FIXME: Currently the type legalizer can't handle VSELECT having v1i1 as
7635dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// condition. If it can legalize "VSELECT v1i1" correctly, no need to combine
7636dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// such VSELECT.
7637dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue performVSelectCombine(SDNode *N, SelectionDAG &DAG) {
7638dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue N0 = N->getOperand(0);
7639dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT CCVT = N0.getValueType();
7640258115258f8fe15e9d74b5fb524f90b75bb917d1Jiangning Liu
7641dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (N0.getOpcode() != ISD::SETCC || CCVT.getVectorNumElements() != 1 ||
7642dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      CCVT.getVectorElementType() != MVT::i1)
7643dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
7644d85ed0caa1f780cbd13af1891d2a30fdfbad547aBill Wendling
7645dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT ResVT = N->getValueType(0);
7646dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT CmpVT = N0.getOperand(0).getValueType();
7647dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Only combine when the result type is of the same size as the compared
7648dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // operands.
7649dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (ResVT.getSizeInBits() != CmpVT.getSizeInBits())
7650dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
7651d85ed0caa1f780cbd13af1891d2a30fdfbad547aBill Wendling
7652dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue IfTrue = N->getOperand(1);
7653dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue IfFalse = N->getOperand(2);
7654dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue SetCC =
7655dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      DAG.getSetCC(SDLoc(N), CmpVT.changeVectorElementTypeToInteger(),
7656dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                   N0.getOperand(0), N0.getOperand(1),
7657dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                   cast<CondCodeSDNode>(N0.getOperand(2))->get());
7658dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return DAG.getNode(ISD::VSELECT, SDLoc(N), ResVT, SetCC,
7659dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                     IfTrue, IfFalse);
7660dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
7661258115258f8fe15e9d74b5fb524f90b75bb917d1Jiangning Liu
7662dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// A vector select: "(select vL, vR, (setcc LHS, RHS))" is best performed with
7663dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// the compare-mask instructions rather than going via NZCV, even if LHS and
7664dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// RHS are really scalar. This replaces any scalar setcc in the above pattern
7665dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines/// with a vector one followed by a DUP shuffle on the result.
7666dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesstatic SDValue performSelectCombine(SDNode *N, SelectionDAG &DAG) {
7667dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue N0 = N->getOperand(0);
7668dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT ResVT = N->getValueType(0);
7669258115258f8fe15e9d74b5fb524f90b75bb917d1Jiangning Liu
7670dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!N->getOperand(1).getValueType().isVector())
7671dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
7672767f816b926376bd850a62a28d35343ad0559c91Kevin Qin
7673dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (N0.getOpcode() != ISD::SETCC || N0.getValueType() != MVT::i1)
7674dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SDValue();
7675767f816b926376bd850a62a28d35343ad0559c91Kevin Qin
7676dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDLoc DL(N0);
7677dd518bcc9dd9e4028b2a979ced09edd5b6becd07Jiangning Liu
7678dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT SrcVT = N0.getOperand(0).getValueType();
7679dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SrcVT = EVT::getVectorVT(*DAG.getContext(), SrcVT,
7680dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                           ResVT.getSizeInBits() / SrcVT.getSizeInBits());
7681dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT CCVT = SrcVT.changeVectorElementTypeToInteger();
7682dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7683dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // First perform a vector comparison, where lane 0 is the one we're interested
7684dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // in.
7685dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue LHS =
7686dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      DAG.getNode(ISD::SCALAR_TO_VECTOR, DL, SrcVT, N0.getOperand(0));
7687dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue RHS =
7688dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      DAG.getNode(ISD::SCALAR_TO_VECTOR, DL, SrcVT, N0.getOperand(1));
7689dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue SetCC = DAG.getNode(ISD::SETCC, DL, CCVT, LHS, RHS, N0.getOperand(2));
7690dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7691dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Now duplicate the comparison mask we want across all other lanes.
7692dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SmallVector<int, 8> DUPMask(CCVT.getVectorNumElements(), 0);
7693dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Mask = DAG.getVectorShuffle(CCVT, DL, SetCC, SetCC, DUPMask.data());
7694dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Mask = DAG.getNode(ISD::BITCAST, DL, ResVT.changeVectorElementTypeToInteger(),
7695dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                     Mask);
7696dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7697dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return DAG.getSelect(DL, ResVT, Mask, N->getOperand(1), N->getOperand(2));
7698dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
7699258115258f8fe15e9d74b5fb524f90b75bb917d1Jiangning Liu
7700dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesSDValue AArch64TargetLowering::PerformDAGCombine(SDNode *N,
7701dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                                 DAGCombinerInfo &DCI) const {
7702dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SelectionDAG &DAG = DCI.DAG;
7703dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  switch (N->getOpcode()) {
7704dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  default:
7705dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    break;
7706dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::ADD:
7707dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SUB:
7708dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return performAddSubLongCombine(N, DCI, DAG);
7709dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::XOR:
7710dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return performXorCombine(N, DAG, DCI, Subtarget);
7711dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::MUL:
7712dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return performMulCombine(N, DAG, DCI, Subtarget);
7713dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SINT_TO_FP:
7714dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::UINT_TO_FP:
7715dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return performIntToFpCombine(N, DAG);
7716dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::OR:
7717dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return performORCombine(N, DCI, Subtarget);
7718dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::INTRINSIC_WO_CHAIN:
7719dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return performIntrinsicCombine(N, DCI, Subtarget);
7720dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::ANY_EXTEND:
7721dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::ZERO_EXTEND:
7722dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SIGN_EXTEND:
7723dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return performExtendCombine(N, DCI, DAG);
7724dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::BITCAST:
7725dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return performBitcastCombine(N, DCI, DAG);
7726dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::CONCAT_VECTORS:
7727dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return performConcatVectorsCombine(N, DCI, DAG);
7728dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::SELECT:
7729dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return performSelectCombine(N, DAG);
7730dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::VSELECT:
7731dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return performVSelectCombine(N, DCI.DAG);
7732dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::STORE:
7733dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return performSTORECombine(N, DCI, DAG, Subtarget);
7734dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::BRCOND:
7735dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return performBRCONDCombine(N, DCI, DAG);
7736dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case AArch64ISD::DUP:
7737dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return performPostLD1Combine(N, DCI, false);
7738dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::INSERT_VECTOR_ELT:
7739dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return performPostLD1Combine(N, DCI, true);
7740dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::INTRINSIC_VOID:
7741dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::INTRINSIC_W_CHAIN:
7742dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    switch (cast<ConstantSDNode>(N->getOperand(1))->getZExtValue()) {
7743dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_ld2:
7744dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_ld3:
7745dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_ld4:
7746dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_ld1x2:
7747dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_ld1x3:
7748dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_ld1x4:
7749dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_ld2lane:
7750dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_ld3lane:
7751dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_ld4lane:
7752dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_ld2r:
7753dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_ld3r:
7754dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_ld4r:
7755dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_st2:
7756dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_st3:
7757dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_st4:
7758dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_st1x2:
7759dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_st1x3:
7760dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_st1x4:
7761dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_st2lane:
7762dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_st3lane:
7763dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    case Intrinsic::aarch64_neon_st4lane:
7764dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return performNEONPostLDSTCombine(N, DCI, DAG);
7765dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    default:
7766dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      break;
77678a0ff1f236e77214878c9d493e786b30656ad2a1Bill Wendling    }
7768258115258f8fe15e9d74b5fb524f90b75bb917d1Jiangning Liu  }
7769dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return SDValue();
7770dd518bcc9dd9e4028b2a979ced09edd5b6becd07Jiangning Liu}
7771dd518bcc9dd9e4028b2a979ced09edd5b6becd07Jiangning Liu
7772dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// Check if the return value is used as only a return value, as otherwise
7773dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// we can't perform a tail-call. In particular, we need to check for
7774dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// target ISD nodes that are returns and any other "odd" constructs
7775dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// that the generic analysis code won't necessarily catch.
7776dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesbool AArch64TargetLowering::isUsedByReturnOnly(SDNode *N,
7777dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                               SDValue &Chain) const {
7778dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (N->getNumValues() != 1)
7779dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return false;
7780dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!N->hasNUsesOfValue(1, 0))
7781dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return false;
7782dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7783dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue TCChain = Chain;
7784dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDNode *Copy = *N->use_begin();
7785dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Copy->getOpcode() == ISD::CopyToReg) {
7786dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // If the copy has a glue operand, we conservatively assume it isn't safe to
7787dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // perform a tail call.
7788dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (Copy->getOperand(Copy->getNumOperands() - 1).getValueType() ==
7789dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        MVT::Glue)
7790dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return false;
7791dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    TCChain = Copy->getOperand(0);
7792dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  } else if (Copy->getOpcode() != ISD::FP_EXTEND)
7793dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return false;
7794dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7795dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  bool HasRet = false;
7796dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  for (SDNode *Node : Copy->uses()) {
7797dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (Node->getOpcode() != AArch64ISD::RET_FLAG)
7798dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return false;
7799dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    HasRet = true;
780072062f5744557e270a38192554c3126ea5f97434Tim Northover  }
780172062f5744557e270a38192554c3126ea5f97434Tim Northover
7802dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!HasRet)
7803dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return false;
780472062f5744557e270a38192554c3126ea5f97434Tim Northover
7805dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Chain = TCChain;
7806dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return true;
780772062f5744557e270a38192554c3126ea5f97434Tim Northover}
780872062f5744557e270a38192554c3126ea5f97434Tim Northover
7809dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// Return whether the an instruction can potentially be optimized to a tail
7810dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// call. This will cause the optimizers to attempt to move, or duplicate,
7811dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// return instructions to help enable tail call optimizations for this
7812dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines// instruction.
7813dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesbool AArch64TargetLowering::mayBeEmittedAsTailCall(CallInst *CI) const {
7814dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!CI->isTailCall())
7815dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return false;
781672062f5744557e270a38192554c3126ea5f97434Tim Northover
7817dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return true;
781872062f5744557e270a38192554c3126ea5f97434Tim Northover}
781972062f5744557e270a38192554c3126ea5f97434Tim Northover
7820dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesbool AArch64TargetLowering::getIndexedAddressParts(SDNode *Op, SDValue &Base,
7821dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                                   SDValue &Offset,
7822dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                                   ISD::MemIndexedMode &AM,
7823dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                                   bool &IsInc,
7824dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                                   SelectionDAG &DAG) const {
7825dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Op->getOpcode() != ISD::ADD && Op->getOpcode() != ISD::SUB)
7826dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return false;
782772062f5744557e270a38192554c3126ea5f97434Tim Northover
7828dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Base = Op->getOperand(0);
7829dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // All of the indexed addressing mode instructions take a signed
7830dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // 9 bit immediate offset.
7831dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(Op->getOperand(1))) {
7832dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    int64_t RHSC = (int64_t)RHS->getZExtValue();
7833dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    if (RHSC >= 256 || RHSC <= -256)
7834dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      return false;
7835dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    IsInc = (Op->getOpcode() == ISD::ADD);
7836dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Offset = Op->getOperand(1);
7837dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return true;
7838dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  }
7839dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return false;
7840dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
784172062f5744557e270a38192554c3126ea5f97434Tim Northover
7842dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesbool AArch64TargetLowering::getPreIndexedAddressParts(SDNode *N, SDValue &Base,
7843dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                                      SDValue &Offset,
7844dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                                      ISD::MemIndexedMode &AM,
7845dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                                      SelectionDAG &DAG) const {
7846dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT;
7847dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Ptr;
7848dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) {
7849dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    VT = LD->getMemoryVT();
7850dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Ptr = LD->getBasePtr();
7851dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  } else if (StoreSDNode *ST = dyn_cast<StoreSDNode>(N)) {
7852dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    VT = ST->getMemoryVT();
7853dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Ptr = ST->getBasePtr();
7854dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  } else
7855dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return false;
785672062f5744557e270a38192554c3126ea5f97434Tim Northover
7857dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  bool IsInc;
7858dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!getIndexedAddressParts(Ptr.getNode(), Base, Offset, AM, IsInc, DAG))
7859dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return false;
7860dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  AM = IsInc ? ISD::PRE_INC : ISD::PRE_DEC;
7861dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return true;
7862dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
786372062f5744557e270a38192554c3126ea5f97434Tim Northover
7864dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesbool AArch64TargetLowering::getPostIndexedAddressParts(
7865dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDNode *N, SDNode *Op, SDValue &Base, SDValue &Offset,
7866dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    ISD::MemIndexedMode &AM, SelectionDAG &DAG) const {
7867dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  EVT VT;
7868dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  SDValue Ptr;
7869dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) {
7870dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    VT = LD->getMemoryVT();
7871dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Ptr = LD->getBasePtr();
7872dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  } else if (StoreSDNode *ST = dyn_cast<StoreSDNode>(N)) {
7873dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    VT = ST->getMemoryVT();
7874dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Ptr = ST->getBasePtr();
7875dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  } else
7876dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return false;
787772062f5744557e270a38192554c3126ea5f97434Tim Northover
7878dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  bool IsInc;
7879dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (!getIndexedAddressParts(Op, Base, Offset, AM, IsInc, DAG))
7880dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return false;
7881dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Post-indexing updates the base, so it's not a valid transform
7882dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // if that's not the same as the load's pointer.
7883dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Ptr != Base)
7884dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return false;
7885dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  AM = IsInc ? ISD::POST_INC : ISD::POST_DEC;
7886dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return true;
7887dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
788872062f5744557e270a38192554c3126ea5f97434Tim Northover
7889dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesvoid AArch64TargetLowering::ReplaceNodeResults(
7890dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    SDNode *N, SmallVectorImpl<SDValue> &Results, SelectionDAG &DAG) const {
7891dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  switch (N->getOpcode()) {
7892dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  default:
7893dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    llvm_unreachable("Don't know how to custom expand this");
7894dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::FP_TO_UINT:
7895dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  case ISD::FP_TO_SINT:
7896dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    assert(N->getValueType(0) == MVT::i128 && "unexpected illegal conversion");
7897dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    // Let normal code take care of it by not adding anything to Results.
789872062f5744557e270a38192554c3126ea5f97434Tim Northover    return;
789972062f5744557e270a38192554c3126ea5f97434Tim Northover  }
7900dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines}
790172062f5744557e270a38192554c3126ea5f97434Tim Northover
7902dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesbool AArch64TargetLowering::shouldExpandAtomicInIR(Instruction *Inst) const {
7903dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Loads and stores less than 128-bits are already atomic; ones above that
7904dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // are doomed anyway, so defer to the default libcall and blame the OS when
7905dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // things go wrong:
7906dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (StoreInst *SI = dyn_cast<StoreInst>(Inst))
7907dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return SI->getValueOperand()->getType()->getPrimitiveSizeInBits() == 128;
7908dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  else if (LoadInst *LI = dyn_cast<LoadInst>(Inst))
7909dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return LI->getType()->getPrimitiveSizeInBits() == 128;
7910dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7911dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // For the real atomic operations, we have ldxr/stxr up to 128 bits.
7912dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return Inst->getType()->getPrimitiveSizeInBits() <= 128;
791372062f5744557e270a38192554c3126ea5f97434Tim Northover}
791472062f5744557e270a38192554c3126ea5f97434Tim Northover
7915cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen HinesTargetLoweringBase::LegalizeTypeAction
7916cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen HinesAArch64TargetLowering::getPreferredVectorAction(EVT VT) const {
7917cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines  MVT SVT = VT.getSimpleVT();
7918cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines  // During type legalization, we prefer to widen v1i8, v1i16, v1i32  to v8i8,
7919cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines  // v4i16, v2i32 instead of to promote.
7920cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines  if (SVT == MVT::v1i8 || SVT == MVT::v1i16 || SVT == MVT::v1i32
7921cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines      || SVT == MVT::v1f32)
7922cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines    return TypeWidenVector;
7923cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines
7924cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines  return TargetLoweringBase::getPreferredVectorAction(VT);
7925cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines}
7926cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines
7927dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesValue *AArch64TargetLowering::emitLoadLinked(IRBuilder<> &Builder, Value *Addr,
7928dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                             AtomicOrdering Ord) const {
7929dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Module *M = Builder.GetInsertBlock()->getParent()->getParent();
7930dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Type *ValTy = cast<PointerType>(Addr->getType())->getElementType();
7931dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  bool IsAcquire =
7932dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Ord == Acquire || Ord == AcquireRelease || Ord == SequentiallyConsistent;
7933dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7934dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Since i128 isn't legal and intrinsics don't get type-lowered, the ldrexd
7935dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // intrinsic must return {i64, i64} and we have to recombine them into a
7936dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // single i128 here.
7937dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (ValTy->getPrimitiveSizeInBits() == 128) {
7938dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Intrinsic::ID Int =
7939dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        IsAcquire ? Intrinsic::aarch64_ldaxp : Intrinsic::aarch64_ldxp;
7940dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Function *Ldxr = llvm::Intrinsic::getDeclaration(M, Int);
7941dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7942dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Addr = Builder.CreateBitCast(Addr, Type::getInt8PtrTy(M->getContext()));
7943dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Value *LoHi = Builder.CreateCall(Ldxr, Addr, "lohi");
7944dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7945dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Value *Lo = Builder.CreateExtractValue(LoHi, 0, "lo");
7946dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Value *Hi = Builder.CreateExtractValue(LoHi, 1, "hi");
7947dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Lo = Builder.CreateZExt(Lo, ValTy, "lo64");
7948dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Hi = Builder.CreateZExt(Hi, ValTy, "hi64");
7949dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return Builder.CreateOr(
7950dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        Lo, Builder.CreateShl(Hi, ConstantInt::get(ValTy, 64)), "val64");
795172062f5744557e270a38192554c3126ea5f97434Tim Northover  }
795272062f5744557e270a38192554c3126ea5f97434Tim Northover
7953dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Type *Tys[] = { Addr->getType() };
7954dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Intrinsic::ID Int =
7955dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      IsAcquire ? Intrinsic::aarch64_ldaxr : Intrinsic::aarch64_ldxr;
7956dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Function *Ldxr = llvm::Intrinsic::getDeclaration(M, Int, Tys);
7957dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7958dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return Builder.CreateTruncOrBitCast(
7959dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Builder.CreateCall(Ldxr, Addr),
7960dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      cast<PointerType>(Addr->getType())->getElementType());
796172062f5744557e270a38192554c3126ea5f97434Tim Northover}
79626a5a667517160ca1b557002a29d08868ae029451Hao Liu
7963dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesValue *AArch64TargetLowering::emitStoreConditional(IRBuilder<> &Builder,
7964dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                                   Value *Val, Value *Addr,
7965dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                                                   AtomicOrdering Ord) const {
7966dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Module *M = Builder.GetInsertBlock()->getParent()->getParent();
7967dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  bool IsRelease =
7968dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Ord == Release || Ord == AcquireRelease || Ord == SequentiallyConsistent;
7969dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7970dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // Since the intrinsics must have legal type, the i128 intrinsics take two
7971dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // parameters: "i64, i64". We must marshal Val into the appropriate form
7972dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  // before the call.
7973dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  if (Val->getType()->getPrimitiveSizeInBits() == 128) {
7974dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Intrinsic::ID Int =
7975dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines        IsRelease ? Intrinsic::aarch64_stlxp : Intrinsic::aarch64_stxp;
7976dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Function *Stxr = Intrinsic::getDeclaration(M, Int);
7977dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Type *Int64Ty = Type::getInt64Ty(M->getContext());
7978dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7979dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Value *Lo = Builder.CreateTrunc(Val, Int64Ty, "lo");
7980dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Value *Hi = Builder.CreateTrunc(Builder.CreateLShr(Val, 64), Int64Ty, "hi");
7981dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    Addr = Builder.CreateBitCast(Addr, Type::getInt8PtrTy(M->getContext()));
7982dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines    return Builder.CreateCall3(Stxr, Lo, Hi, Addr);
79836a5a667517160ca1b557002a29d08868ae029451Hao Liu  }
79846a5a667517160ca1b557002a29d08868ae029451Hao Liu
7985dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Intrinsic::ID Int =
7986dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      IsRelease ? Intrinsic::aarch64_stlxr : Intrinsic::aarch64_stxr;
7987dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Type *Tys[] = { Addr->getType() };
7988dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  Function *Stxr = Intrinsic::getDeclaration(M, Int, Tys);
7989dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines
7990dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines  return Builder.CreateCall2(
7991dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Stxr, Builder.CreateZExtOrBitCast(
7992dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines                Val, Stxr->getFunctionType()->getParamType(0)),
7993dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines      Addr);
79946a5a667517160ca1b557002a29d08868ae029451Hao Liu}
7995