FastISel.cpp revision c9c137b463b953fbf8942f655d67f6dc1a0f7965
13b172f1c018a093d0dae3105324d782103fcda6dDan Gohman//===-- FastISel.cpp - Implementation of the FastISel class ---------------===// 2b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman// 3b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman// The LLVM Compiler Infrastructure 4b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman// 5b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman// This file is distributed under the University of Illinois Open Source 6b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman// License. See LICENSE.TXT for details. 7b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman// 8b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman//===----------------------------------------------------------------------===// 9b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman// 10b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman// This file contains the implementation of the FastISel class. 11b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman// 125ec9efd61bc4214c787287409498e8b78f28c922Dan Gohman// "Fast" instruction selection is designed to emit very poor code quickly. 135ec9efd61bc4214c787287409498e8b78f28c922Dan Gohman// Also, it is not designed to be able to do much lowering, so most illegal 1444d2a983b76a2a923e34f3162c960443425cb296Chris Lattner// types (e.g. i64 on 32-bit targets) and operations are not supported. It is 1544d2a983b76a2a923e34f3162c960443425cb296Chris Lattner// also not intended to be able to do much optimization, except in a few cases 1644d2a983b76a2a923e34f3162c960443425cb296Chris Lattner// where doing optimizations reduces overall compile time. For example, folding 1744d2a983b76a2a923e34f3162c960443425cb296Chris Lattner// constants into immediate fields is often done, because it's cheap and it 1844d2a983b76a2a923e34f3162c960443425cb296Chris Lattner// reduces the number of instructions later phases have to examine. 195ec9efd61bc4214c787287409498e8b78f28c922Dan Gohman// 205ec9efd61bc4214c787287409498e8b78f28c922Dan Gohman// "Fast" instruction selection is able to fail gracefully and transfer 215ec9efd61bc4214c787287409498e8b78f28c922Dan Gohman// control to the SelectionDAG selector for operations that it doesn't 2244d2a983b76a2a923e34f3162c960443425cb296Chris Lattner// support. In many cases, this allows us to avoid duplicating a lot of 235ec9efd61bc4214c787287409498e8b78f28c922Dan Gohman// the complicated lowering logic that SelectionDAG currently has. 245ec9efd61bc4214c787287409498e8b78f28c922Dan Gohman// 255ec9efd61bc4214c787287409498e8b78f28c922Dan Gohman// The intended use for "fast" instruction selection is "-O0" mode 265ec9efd61bc4214c787287409498e8b78f28c922Dan Gohman// compilation, where the quality of the generated code is irrelevant when 2744d2a983b76a2a923e34f3162c960443425cb296Chris Lattner// weighed against the speed at which the code can be generated. Also, 285ec9efd61bc4214c787287409498e8b78f28c922Dan Gohman// at -O0, the LLVM optimizers are not running, and this makes the 295ec9efd61bc4214c787287409498e8b78f28c922Dan Gohman// compile time of codegen a much higher portion of the overall compile 3044d2a983b76a2a923e34f3162c960443425cb296Chris Lattner// time. Despite its limitations, "fast" instruction selection is able to 315ec9efd61bc4214c787287409498e8b78f28c922Dan Gohman// handle enough code on its own to provide noticeable overall speedups 325ec9efd61bc4214c787287409498e8b78f28c922Dan Gohman// in -O0 compiles. 335ec9efd61bc4214c787287409498e8b78f28c922Dan Gohman// 345ec9efd61bc4214c787287409498e8b78f28c922Dan Gohman// Basic operations are supported in a target-independent way, by reading 355ec9efd61bc4214c787287409498e8b78f28c922Dan Gohman// the same instruction descriptions that the SelectionDAG selector reads, 365ec9efd61bc4214c787287409498e8b78f28c922Dan Gohman// and identifying simple arithmetic operations that can be directly selected 3744d2a983b76a2a923e34f3162c960443425cb296Chris Lattner// from simple operators. More complicated operations currently require 385ec9efd61bc4214c787287409498e8b78f28c922Dan Gohman// target-specific code. 395ec9efd61bc4214c787287409498e8b78f28c922Dan Gohman// 40b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman//===----------------------------------------------------------------------===// 41b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 42053e69ad5704a8e0e5f50d8b18f8917377ffacfbChad Rosier#define DEBUG_TYPE "isel" 4333134c4a75558288d663267c8991f6bd37a530afDan Gohman#include "llvm/Function.h" 4433134c4a75558288d663267c8991f6bd37a530afDan Gohman#include "llvm/GlobalVariable.h" 456f2766d59744bb3d48867f3151643eac7111e773Dan Gohman#include "llvm/Instructions.h" 4633134c4a75558288d663267c8991f6bd37a530afDan Gohman#include "llvm/IntrinsicInst.h" 47562b84b3aea359d1f918184e355da82bf05eb290Jay Foad#include "llvm/Operator.h" 482586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman#include "llvm/CodeGen/Analysis.h" 49b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman#include "llvm/CodeGen/FastISel.h" 504c3fd9f92f89810d659973d2666ab729758de64aDan Gohman#include "llvm/CodeGen/FunctionLoweringInfo.h" 51b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman#include "llvm/CodeGen/MachineInstrBuilder.h" 5233134c4a75558288d663267c8991f6bd37a530afDan Gohman#include "llvm/CodeGen/MachineModuleInfo.h" 53b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman#include "llvm/CodeGen/MachineRegisterInfo.h" 5483489bb7700c69b7a4a8da59365c42d3f5c8129bDevang Patel#include "llvm/Analysis/DebugInfo.h" 557fbcc98f20c062273bf16ce9832f40e5b8a205c6Dan Gohman#include "llvm/Analysis/Loads.h" 5683785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng#include "llvm/Target/TargetData.h" 57b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman#include "llvm/Target/TargetInstrInfo.h" 5883785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng#include "llvm/Target/TargetLowering.h" 59bb466331e7e50d03497ce40ee344870236fd9c32Dan Gohman#include "llvm/Target/TargetMachine.h" 60ba5be5c07bb19dcf484e3aa40cd139dd07c10407Dan Gohman#include "llvm/Support/ErrorHandling.h" 61afeaae7a940ce16e7874af31f3e5e91d8ca89e19Devang Patel#include "llvm/Support/Debug.h" 62053e69ad5704a8e0e5f50d8b18f8917377ffacfbChad Rosier#include "llvm/ADT/Statistic.h" 63b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohmanusing namespace llvm; 64b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 65aa5656c6b9161608005cf8dc85027c160a925e58Chad RosierSTATISTIC(NumFastIselSuccessIndependent, "Number of insts selected by " 66aa5656c6b9161608005cf8dc85027c160a925e58Chad Rosier "target-independent selector"); 67aa5656c6b9161608005cf8dc85027c160a925e58Chad RosierSTATISTIC(NumFastIselSuccessTarget, "Number of insts selected by " 68aa5656c6b9161608005cf8dc85027c160a925e58Chad Rosier "target-specific selector"); 69ae6f2cb1fc520aa56777dab1e7603aee9429f6ddChad RosierSTATISTIC(NumFastIselDead, "Number of dead insts removed on failure"); 70053e69ad5704a8e0e5f50d8b18f8917377ffacfbChad Rosier 7184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman/// startNewBlock - Set the current block to which generated machine 7284023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman/// instructions will be appended, and clear the local CSE map. 7384023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman/// 7484023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohmanvoid FastISel::startNewBlock() { 7584023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman LocalValueMap.clear(); 7684023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 7774af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin EmitStartPt = 0; 7884023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 7974af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin // Advance the emit start point past any EH_LABEL instructions. 8084023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman MachineBasicBlock::iterator 8184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman I = FuncInfo.MBB->begin(), E = FuncInfo.MBB->end(); 8284023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman while (I != E && I->getOpcode() == TargetOpcode::EH_LABEL) { 8374af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin EmitStartPt = I; 8484023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman ++I; 8584023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman } 8674af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin LastLocalValue = EmitStartPt; 8774af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin} 8874af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin 8974af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasinvoid FastISel::flushLocalValueMap() { 9074af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin LocalValueMap.clear(); 9174af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin LastLocalValue = EmitStartPt; 9274af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin recomputeInsertPt(); 9384023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman} 9484023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 95a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohmanbool FastISel::hasTrivialKill(const Value *V) const { 967f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman // Don't consider constants or arguments to have trivial kills. 97a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman const Instruction *I = dyn_cast<Instruction>(V); 987f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman if (!I) 997f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman return false; 1007f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman 1017f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman // No-op casts are trivially coalesced by fast-isel. 1027f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman if (const CastInst *Cast = dyn_cast<CastInst>(I)) 1037f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman if (Cast->isNoopCast(TD.getIntPtrType(Cast->getContext())) && 1047f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman !hasTrivialKill(Cast->getOperand(0))) 1057f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman return false; 1067f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman 10722b34cce4d270f787d4c991baee596a9e3b7f836Chad Rosier // GEPs with all zero indices are trivially coalesced by fast-isel. 10822b34cce4d270f787d4c991baee596a9e3b7f836Chad Rosier if (const GetElementPtrInst *GEP = dyn_cast<GetElementPtrInst>(I)) 10922b34cce4d270f787d4c991baee596a9e3b7f836Chad Rosier if (GEP->hasAllZeroIndices() && !hasTrivialKill(GEP->getOperand(0))) 11022b34cce4d270f787d4c991baee596a9e3b7f836Chad Rosier return false; 11122b34cce4d270f787d4c991baee596a9e3b7f836Chad Rosier 1127f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman // Only instructions with a single use in the same basic block are considered 1137f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman // to have trivial kills. 1147f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman return I->hasOneUse() && 1157f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman !(I->getOpcode() == Instruction::BitCast || 1167f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman I->getOpcode() == Instruction::PtrToInt || 1177f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman I->getOpcode() == Instruction::IntToPtr) && 11896f1d8ebdd33b3f9bdb3b1163f36072c68599f42Gabor Greif cast<Instruction>(*I->use_begin())->getParent() == I->getParent(); 119a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman} 120a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman 12146510a73e977273ec67747eb34cbdb43f815e451Dan Gohmanunsigned FastISel::getRegForValue(const Value *V) { 122e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT RealVT = TLI.getValueType(V->getType(), /*AllowUnknown=*/true); 1234fd552880c9f42f117bd79929ea0179f99bd6bb7Dan Gohman // Don't handle non-simple values in FastISel. 1244fd552880c9f42f117bd79929ea0179f99bd6bb7Dan Gohman if (!RealVT.isSimple()) 1254fd552880c9f42f117bd79929ea0179f99bd6bb7Dan Gohman return 0; 126821164875706dd28e48c6cc3cea5c8ffa6e658d1Dan Gohman 127c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman // Ignore illegal types. We must do this before looking up the value 128c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman // in ValueMap because Arguments are given virtual registers regardless 129c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman // of whether FastISel can handle them. 130825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson MVT VT = RealVT.getSimpleVT(); 131821164875706dd28e48c6cc3cea5c8ffa6e658d1Dan Gohman if (!TLI.isTypeLegal(VT)) { 13276927d7303046058c627691bd45d6bff608f49f4Eli Friedman // Handle integer promotions, though, because they're common and easy. 13376927d7303046058c627691bd45d6bff608f49f4Eli Friedman if (VT == MVT::i1 || VT == MVT::i8 || VT == MVT::i16) 13423b9b19b1a5a00faa9fce0788155c7dbfd00bfb1Owen Anderson VT = TLI.getTypeToTransformTo(V->getContext(), VT).getSimpleVT(); 135821164875706dd28e48c6cc3cea5c8ffa6e658d1Dan Gohman else 136821164875706dd28e48c6cc3cea5c8ffa6e658d1Dan Gohman return 0; 137821164875706dd28e48c6cc3cea5c8ffa6e658d1Dan Gohman } 138821164875706dd28e48c6cc3cea5c8ffa6e658d1Dan Gohman 139c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman // Look up the value to see if we already have a register for it. We 140c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman // cache values defined by Instructions across blocks, and other values 141c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman // only locally. This is because Instructions already have the SSA 1425c9cf19d1e7d044e786f03331bc3f004966a69d2Dan Gohman // def-dominates-use requirement enforced. 143a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman DenseMap<const Value *, unsigned>::iterator I = FuncInfo.ValueMap.find(V); 144fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner if (I != FuncInfo.ValueMap.end()) 145fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner return I->second; 146fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner 147c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman unsigned Reg = LocalValueMap[V]; 148c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman if (Reg != 0) 149c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman return Reg; 150c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman 15197c94b8fc630b55e17a37481910810639e28d086Dan Gohman // In bottom-up mode, just create the virtual register which will be used 15297c94b8fc630b55e17a37481910810639e28d086Dan Gohman // to hold the value. It will be materialized later. 15384023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman if (isa<Instruction>(V) && 15484023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman (!isa<AllocaInst>(V) || 15584023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman !FuncInfo.StaticAllocaMap.count(cast<AllocaInst>(V)))) 15684023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman return FuncInfo.InitializeRegForValue(V); 15784023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 158a10b8494a50108482302f6f077d72fbc76d776edDan Gohman SavePoint SaveInsertPt = enterLocalValueArea(); 15984023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 16084023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman // Materialize the value in a register. Emit any instructions in the 16184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman // local value area. 16284023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman Reg = materializeRegForValue(V, VT); 16384023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 16484023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman leaveLocalValueArea(SaveInsertPt); 16597c94b8fc630b55e17a37481910810639e28d086Dan Gohman 16684023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman return Reg; 1671fdc614bee2a324fcc210d1e46d9b6fca3ca324bDan Gohman} 1681fdc614bee2a324fcc210d1e46d9b6fca3ca324bDan Gohman 16944a2c3476bd15e03f294bae1b50016851f214f8dEric Christopher/// materializeRegForValue - Helper for getRegForValue. This function is 1701fdc614bee2a324fcc210d1e46d9b6fca3ca324bDan Gohman/// called when the value isn't already available in a register and must 1711fdc614bee2a324fcc210d1e46d9b6fca3ca324bDan Gohman/// be materialized with new instructions. 1721fdc614bee2a324fcc210d1e46d9b6fca3ca324bDan Gohmanunsigned FastISel::materializeRegForValue(const Value *V, MVT VT) { 1731fdc614bee2a324fcc210d1e46d9b6fca3ca324bDan Gohman unsigned Reg = 0; 1741fdc614bee2a324fcc210d1e46d9b6fca3ca324bDan Gohman 17546510a73e977273ec67747eb34cbdb43f815e451Dan Gohman if (const ConstantInt *CI = dyn_cast<ConstantInt>(V)) { 1762ff7fd146159d97abe94391a33b4385abb06bbb0Dan Gohman if (CI->getValue().getActiveBits() <= 64) 1772ff7fd146159d97abe94391a33b4385abb06bbb0Dan Gohman Reg = FastEmit_i(VT, VT, ISD::Constant, CI->getZExtValue()); 1780586d91bb3e516d5826826522d9a90ed6ef74d86Dan Gohman } else if (isa<AllocaInst>(V)) { 1792ff7fd146159d97abe94391a33b4385abb06bbb0Dan Gohman Reg = TargetMaterializeAlloca(cast<AllocaInst>(V)); 180205d92589bc8c59d4bba9ddf89e0eb3c4d548cdaDan Gohman } else if (isa<ConstantPointerNull>(V)) { 1811e9e8c3bd5ac018296bddb21a2acb8c643303b39Dan Gohman // Translate this as an integer zero so that it can be 1821e9e8c3bd5ac018296bddb21a2acb8c643303b39Dan Gohman // local-CSE'd with actual integer zeros. 1831d0be15f89cb5056e20e2d24faa8d6afb1573bcaOwen Anderson Reg = 1841d0be15f89cb5056e20e2d24faa8d6afb1573bcaOwen Anderson getRegForValue(Constant::getNullValue(TD.getIntPtrType(V->getContext()))); 18546510a73e977273ec67747eb34cbdb43f815e451Dan Gohman } else if (const ConstantFP *CF = dyn_cast<ConstantFP>(V)) { 186bd1253809bc1b2455793a64d2801db3d6317b08eEli Friedman if (CF->isNullValue()) { 1872790ba8e5a7bb6e00fdac9997d840598fb60271cEli Friedman Reg = TargetMaterializeFloatZero(CF); 1882790ba8e5a7bb6e00fdac9997d840598fb60271cEli Friedman } else { 1892790ba8e5a7bb6e00fdac9997d840598fb60271cEli Friedman // Try to emit the constant directly. 1902790ba8e5a7bb6e00fdac9997d840598fb60271cEli Friedman Reg = FastEmit_f(VT, VT, ISD::ConstantFP, CF); 1912790ba8e5a7bb6e00fdac9997d840598fb60271cEli Friedman } 192ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman 193ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman if (!Reg) { 1944183e31978146ea529a87a2fc47b96aeb6cbe000Dan Gohman // Try to emit the constant by using an integer constant with a cast. 195ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman const APFloat &Flt = CF->getValueAPF(); 196e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT IntVT = TLI.getPointerTy(); 197ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman 198ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman uint64_t x[2]; 199ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman uint32_t IntBitWidth = IntVT.getSizeInBits(); 20023a98551ab65eeb8fe5019df8b7db4891582a4bdDale Johannesen bool isExact; 20123a98551ab65eeb8fe5019df8b7db4891582a4bdDale Johannesen (void) Flt.convertToInteger(x, IntBitWidth, /*isSigned=*/true, 20223a98551ab65eeb8fe5019df8b7db4891582a4bdDale Johannesen APFloat::rmTowardZero, &isExact); 20323a98551ab65eeb8fe5019df8b7db4891582a4bdDale Johannesen if (isExact) { 2043ba292dbc2acee2d1052fb7ffe332e2164147b47Jeffrey Yasskin APInt IntVal(IntBitWidth, x); 205ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman 206e922c0201916e0b980ab3cfe91e1413e68d55647Owen Anderson unsigned IntegerReg = 207eed707b1e6097aac2bb6b3d47271f6300ace7f2eOwen Anderson getRegForValue(ConstantInt::get(V->getContext(), IntVal)); 2082ff7fd146159d97abe94391a33b4385abb06bbb0Dan Gohman if (IntegerReg != 0) 209a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman Reg = FastEmit_r(IntVT.getSimpleVT(), VT, ISD::SINT_TO_FP, 210a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IntegerReg, /*Kill=*/false); 2112ff7fd146159d97abe94391a33b4385abb06bbb0Dan Gohman } 212ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman } 21346510a73e977273ec67747eb34cbdb43f815e451Dan Gohman } else if (const Operator *Op = dyn_cast<Operator>(V)) { 21420d4be151b54feb18aa1e5cc04033a4aa64137aeDan Gohman if (!SelectOperator(Op, Op->getOpcode())) 21520d4be151b54feb18aa1e5cc04033a4aa64137aeDan Gohman if (!isa<Instruction>(Op) || 21620d4be151b54feb18aa1e5cc04033a4aa64137aeDan Gohman !TargetSelectInstruction(cast<Instruction>(Op))) 21720d4be151b54feb18aa1e5cc04033a4aa64137aeDan Gohman return 0; 21837db6cdaea47d0637bdbe624f7b10ff8f82928adDan Gohman Reg = lookUpRegForValue(Op); 219205d92589bc8c59d4bba9ddf89e0eb3c4d548cdaDan Gohman } else if (isa<UndefValue>(V)) { 220104e4ce1629ea84736691bd1ee7867bdf90e8a2eDan Gohman Reg = createResultReg(TLI.getRegClassFor(VT)); 22184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, 22284023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman TII.get(TargetOpcode::IMPLICIT_DEF), Reg); 223ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman } 224bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 225dceffe66b9e73ce372ea11c0fc6975504eb8c31dDan Gohman // If target-independent code couldn't handle the value, give target-specific 226dceffe66b9e73ce372ea11c0fc6975504eb8c31dDan Gohman // code a try. 2276e6074508c2f781c3e52dfe0e301cb1c7f395a91Owen Anderson if (!Reg && isa<Constant>(V)) 2282ff7fd146159d97abe94391a33b4385abb06bbb0Dan Gohman Reg = TargetMaterializeConstant(cast<Constant>(V)); 229bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 2302ff7fd146159d97abe94391a33b4385abb06bbb0Dan Gohman // Don't cache constant materializations in the general ValueMap. 2312ff7fd146159d97abe94391a33b4385abb06bbb0Dan Gohman // To do so would require tracking what uses they dominate. 23284023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman if (Reg != 0) { 233dceffe66b9e73ce372ea11c0fc6975504eb8c31dDan Gohman LocalValueMap[V] = Reg; 23484023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman LastLocalValue = MRI.getVRegDef(Reg); 23584023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman } 236104e4ce1629ea84736691bd1ee7867bdf90e8a2eDan Gohman return Reg; 237ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman} 238ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman 23946510a73e977273ec67747eb34cbdb43f815e451Dan Gohmanunsigned FastISel::lookUpRegForValue(const Value *V) { 24059fbc80f6b3b5c71dfb84149f589625f7ed510e3Evan Cheng // Look up the value to see if we already have a register for it. We 24159fbc80f6b3b5c71dfb84149f589625f7ed510e3Evan Cheng // cache values defined by Instructions across blocks, and other values 24259fbc80f6b3b5c71dfb84149f589625f7ed510e3Evan Cheng // only locally. This is because Instructions already have the SSA 2431fdc614bee2a324fcc210d1e46d9b6fca3ca324bDan Gohman // def-dominates-use requirement enforced. 244a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman DenseMap<const Value *, unsigned>::iterator I = FuncInfo.ValueMap.find(V); 245a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman if (I != FuncInfo.ValueMap.end()) 2463193a689db3de8640d412ccd9482301647359a4eDan Gohman return I->second; 24759fbc80f6b3b5c71dfb84149f589625f7ed510e3Evan Cheng return LocalValueMap[V]; 24859fbc80f6b3b5c71dfb84149f589625f7ed510e3Evan Cheng} 24959fbc80f6b3b5c71dfb84149f589625f7ed510e3Evan Cheng 250cc54e76cc67bbc9badc024ab29053602769bd255Owen Anderson/// UpdateValueMap - Update the value map to include the new mapping for this 251cc54e76cc67bbc9badc024ab29053602769bd255Owen Anderson/// instruction, or insert an extra copy to get the result in a previous 252cc54e76cc67bbc9badc024ab29053602769bd255Owen Anderson/// determined register. 253cc54e76cc67bbc9badc024ab29053602769bd255Owen Anderson/// NOTE: This is only necessary because we might select a block that uses 254cc54e76cc67bbc9badc024ab29053602769bd255Owen Anderson/// a value before we select the block that defines the value. It might be 255cc54e76cc67bbc9badc024ab29053602769bd255Owen Anderson/// possible to fix this by selecting blocks in reverse postorder. 256482feb33b2bba677d47bab859d9e1e95d67016bdEli Friedmanvoid FastISel::UpdateValueMap(const Value *I, unsigned Reg, unsigned NumRegs) { 25740b189e4e257924d90aaf63bf2e12bc7bbca961aDan Gohman if (!isa<Instruction>(I)) { 25840b189e4e257924d90aaf63bf2e12bc7bbca961aDan Gohman LocalValueMap[I] = Reg; 259482feb33b2bba677d47bab859d9e1e95d67016bdEli Friedman return; 260c5040ab6065d5c569a1af0848b6e672b22b174b7Chris Lattner } 261bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 262a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman unsigned &AssignedReg = FuncInfo.ValueMap[I]; 263c5040ab6065d5c569a1af0848b6e672b22b174b7Chris Lattner if (AssignedReg == 0) 26484023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman // Use the new register. 265c5040ab6065d5c569a1af0848b6e672b22b174b7Chris Lattner AssignedReg = Reg; 26636e3946ac2f30a0bda66538ef2b974b1c8fbdc97Chris Lattner else if (Reg != AssignedReg) { 26784023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman // Arrange for uses of AssignedReg to be replaced by uses of Reg. 268482feb33b2bba677d47bab859d9e1e95d67016bdEli Friedman for (unsigned i = 0; i < NumRegs; i++) 269482feb33b2bba677d47bab859d9e1e95d67016bdEli Friedman FuncInfo.RegFixups[AssignedReg+i] = Reg+i; 27084023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 27184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman AssignedReg = Reg; 27240b189e4e257924d90aaf63bf2e12bc7bbca961aDan Gohman } 273cc54e76cc67bbc9badc024ab29053602769bd255Owen Anderson} 274cc54e76cc67bbc9badc024ab29053602769bd255Owen Anderson 275a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohmanstd::pair<unsigned, bool> FastISel::getRegForGEPIndex(const Value *Idx) { 276c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman unsigned IdxN = getRegForValue(Idx); 277c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman if (IdxN == 0) 278c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman // Unhandled operand. Halt "fast" selection and bail. 279a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman return std::pair<unsigned, bool>(0, false); 280a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman 281a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman bool IdxNIsKill = hasTrivialKill(Idx); 282c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman 283c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman // If the index is smaller or larger than intptr_t, truncate or extend it. 284766b5efd99c01e26f00f22d81b57d1385b3d2ab0Owen Anderson MVT PtrVT = TLI.getPointerTy(); 285e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT IdxVT = EVT::getEVT(Idx->getType(), /*HandleUnknown=*/false); 286a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman if (IdxVT.bitsLT(PtrVT)) { 287a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IdxN = FastEmit_r(IdxVT.getSimpleVT(), PtrVT, ISD::SIGN_EXTEND, 288a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IdxN, IdxNIsKill); 289a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IdxNIsKill = true; 290a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman } 291a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman else if (IdxVT.bitsGT(PtrVT)) { 292a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IdxN = FastEmit_r(IdxVT.getSimpleVT(), PtrVT, ISD::TRUNCATE, 293a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IdxN, IdxNIsKill); 294a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IdxNIsKill = true; 295a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman } 296a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman return std::pair<unsigned, bool>(IdxN, IdxNIsKill); 297c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman} 298c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman 29984023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohmanvoid FastISel::recomputeInsertPt() { 30084023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman if (getLastLocalValue()) { 30184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman FuncInfo.InsertPt = getLastLocalValue(); 302c6e59b71f50c7c77bc448a936dba8e84d90911e8Dan Gohman FuncInfo.MBB = FuncInfo.InsertPt->getParent(); 30384023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman ++FuncInfo.InsertPt; 30484023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman } else 30584023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman FuncInfo.InsertPt = FuncInfo.MBB->getFirstNonPHI(); 30684023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 30784023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman // Now skip past any EH_LABELs, which must remain at the beginning. 30884023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman while (FuncInfo.InsertPt != FuncInfo.MBB->end() && 30984023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman FuncInfo.InsertPt->getOpcode() == TargetOpcode::EH_LABEL) 31084023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman ++FuncInfo.InsertPt; 31184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman} 31284023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 313ae6f2cb1fc520aa56777dab1e7603aee9429f6ddChad Rosiervoid FastISel::removeDeadCode(MachineBasicBlock::iterator I, 314ae6f2cb1fc520aa56777dab1e7603aee9429f6ddChad Rosier MachineBasicBlock::iterator E) { 315ae6f2cb1fc520aa56777dab1e7603aee9429f6ddChad Rosier assert (I && E && std::distance(I, E) > 0 && "Invalid iterator!"); 316ae6f2cb1fc520aa56777dab1e7603aee9429f6ddChad Rosier while (I != E) { 317ae6f2cb1fc520aa56777dab1e7603aee9429f6ddChad Rosier MachineInstr *Dead = &*I; 318ae6f2cb1fc520aa56777dab1e7603aee9429f6ddChad Rosier ++I; 319ae6f2cb1fc520aa56777dab1e7603aee9429f6ddChad Rosier Dead->eraseFromParent(); 320ae6f2cb1fc520aa56777dab1e7603aee9429f6ddChad Rosier ++NumFastIselDead; 321ae6f2cb1fc520aa56777dab1e7603aee9429f6ddChad Rosier } 322ae6f2cb1fc520aa56777dab1e7603aee9429f6ddChad Rosier recomputeInsertPt(); 323ae6f2cb1fc520aa56777dab1e7603aee9429f6ddChad Rosier} 324ae6f2cb1fc520aa56777dab1e7603aee9429f6ddChad Rosier 325a10b8494a50108482302f6f077d72fbc76d776edDan GohmanFastISel::SavePoint FastISel::enterLocalValueArea() { 32684023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman MachineBasicBlock::iterator OldInsertPt = FuncInfo.InsertPt; 327163f78ea4016d594d921154d8df1c9d746fb0ea8Dan Gohman DebugLoc OldDL = DL; 32884023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman recomputeInsertPt(); 329a10b8494a50108482302f6f077d72fbc76d776edDan Gohman DL = DebugLoc(); 330163f78ea4016d594d921154d8df1c9d746fb0ea8Dan Gohman SavePoint SP = { OldInsertPt, OldDL }; 331a10b8494a50108482302f6f077d72fbc76d776edDan Gohman return SP; 33284023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman} 33384023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 334a10b8494a50108482302f6f077d72fbc76d776edDan Gohmanvoid FastISel::leaveLocalValueArea(SavePoint OldInsertPt) { 33584023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman if (FuncInfo.InsertPt != FuncInfo.MBB->begin()) 33684023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman LastLocalValue = llvm::prior(FuncInfo.InsertPt); 33784023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 33884023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman // Restore the previous insert position. 339a10b8494a50108482302f6f077d72fbc76d776edDan Gohman FuncInfo.InsertPt = OldInsertPt.InsertPt; 340a10b8494a50108482302f6f077d72fbc76d776edDan Gohman DL = OldInsertPt.DL; 34184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman} 34284023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 343bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman/// SelectBinaryOp - Select and emit code for a binary operator instruction, 344bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman/// which has an opcode which directly corresponds to the given ISD opcode. 345bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman/// 34646510a73e977273ec67747eb34cbdb43f815e451Dan Gohmanbool FastISel::SelectBinaryOp(const User *I, unsigned ISDOpcode) { 347e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT VT = EVT::getEVT(I->getType(), /*HandleUnknown=*/true); 348825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson if (VT == MVT::Other || !VT.isSimple()) 349d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman // Unhandled type. Halt "fast" selection and bail. 350d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman return false; 351638c6830c6d0d6871065d2b00178ee4aa7d4d044Dan Gohman 352b71fea248fd7cf9ab2c5737997a3dc5682948dc4Dan Gohman // We only handle legal types. For example, on x86-32 the instruction 353b71fea248fd7cf9ab2c5737997a3dc5682948dc4Dan Gohman // selector contains all of the 64-bit instructions from x86-64, 354b71fea248fd7cf9ab2c5737997a3dc5682948dc4Dan Gohman // under the assumption that i64 won't be used if the target doesn't 355b71fea248fd7cf9ab2c5737997a3dc5682948dc4Dan Gohman // support it. 356638c6830c6d0d6871065d2b00178ee4aa7d4d044Dan Gohman if (!TLI.isTypeLegal(VT)) { 357825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson // MVT::i1 is special. Allow AND, OR, or XOR because they 358638c6830c6d0d6871065d2b00178ee4aa7d4d044Dan Gohman // don't require additional zeroing, which makes them easy. 359825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson if (VT == MVT::i1 && 3605dd9c2e9aea7294c184609aff7f2fe82eaea4eb0Dan Gohman (ISDOpcode == ISD::AND || ISDOpcode == ISD::OR || 3615dd9c2e9aea7294c184609aff7f2fe82eaea4eb0Dan Gohman ISDOpcode == ISD::XOR)) 36223b9b19b1a5a00faa9fce0788155c7dbfd00bfb1Owen Anderson VT = TLI.getTypeToTransformTo(I->getContext(), VT); 363638c6830c6d0d6871065d2b00178ee4aa7d4d044Dan Gohman else 364638c6830c6d0d6871065d2b00178ee4aa7d4d044Dan Gohman return false; 365638c6830c6d0d6871065d2b00178ee4aa7d4d044Dan Gohman } 366d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman 367fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner // Check if the first operand is a constant, and handle it as "ri". At -O0, 368fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner // we don't have anything that canonicalizes operand order. 369fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner if (ConstantInt *CI = dyn_cast<ConstantInt>(I->getOperand(0))) 370fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner if (isa<Instruction>(I) && cast<Instruction>(I)->isCommutative()) { 371fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner unsigned Op1 = getRegForValue(I->getOperand(1)); 372fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner if (Op1 == 0) return false; 373fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner 374fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner bool Op1IsKill = hasTrivialKill(I->getOperand(1)); 375d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 376602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner unsigned ResultReg = FastEmit_ri_(VT.getSimpleVT(), ISDOpcode, Op1, 377602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner Op1IsKill, CI->getZExtValue(), 378602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner VT.getSimpleVT()); 379602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner if (ResultReg == 0) return false; 380d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 381602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner // We successfully emitted code for the given LLVM Instruction. 382602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner UpdateValueMap(I, ResultReg); 383602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner return true; 384fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner } 385d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 386d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 3873df24e667f04a7003342b534310919abc9c87418Dan Gohman unsigned Op0 = getRegForValue(I->getOperand(0)); 388602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner if (Op0 == 0) // Unhandled operand. Halt "fast" selection and bail. 389a7f2dff98e68ed8b2ac32f953768c04f26b52beaDan Gohman return false; 390a7f2dff98e68ed8b2ac32f953768c04f26b52beaDan Gohman 391a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman bool Op0IsKill = hasTrivialKill(I->getOperand(0)); 392a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman 393d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman // Check if the second operand is a constant and handle it appropriately. 394d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman if (ConstantInt *CI = dyn_cast<ConstantInt>(I->getOperand(1))) { 395602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner uint64_t Imm = CI->getZExtValue(); 396d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 397f051c1a29dd040b4b5ca0c5696d47a9058f87481Chris Lattner // Transform "sdiv exact X, 8" -> "sra X, 3". 398f051c1a29dd040b4b5ca0c5696d47a9058f87481Chris Lattner if (ISDOpcode == ISD::SDIV && isa<BinaryOperator>(I) && 399f051c1a29dd040b4b5ca0c5696d47a9058f87481Chris Lattner cast<BinaryOperator>(I)->isExact() && 400f051c1a29dd040b4b5ca0c5696d47a9058f87481Chris Lattner isPowerOf2_64(Imm)) { 401f051c1a29dd040b4b5ca0c5696d47a9058f87481Chris Lattner Imm = Log2_64(Imm); 402f051c1a29dd040b4b5ca0c5696d47a9058f87481Chris Lattner ISDOpcode = ISD::SRA; 403f051c1a29dd040b4b5ca0c5696d47a9058f87481Chris Lattner } 404d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 405602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner unsigned ResultReg = FastEmit_ri_(VT.getSimpleVT(), ISDOpcode, Op0, 406602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner Op0IsKill, Imm, VT.getSimpleVT()); 407602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner if (ResultReg == 0) return false; 408d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 409602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner // We successfully emitted code for the given LLVM Instruction. 410602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner UpdateValueMap(I, ResultReg); 411602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner return true; 412d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman } 413d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman 41410df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman // Check if the second operand is a constant float. 41510df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman if (ConstantFP *CF = dyn_cast<ConstantFP>(I->getOperand(1))) { 416ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman unsigned ResultReg = FastEmit_rf(VT.getSimpleVT(), VT.getSimpleVT(), 417a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman ISDOpcode, Op0, Op0IsKill, CF); 418ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman if (ResultReg != 0) { 419ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman // We successfully emitted code for the given LLVM Instruction. 4203df24e667f04a7003342b534310919abc9c87418Dan Gohman UpdateValueMap(I, ResultReg); 421ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman return true; 422ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman } 42310df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman } 42410df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman 4253df24e667f04a7003342b534310919abc9c87418Dan Gohman unsigned Op1 = getRegForValue(I->getOperand(1)); 426d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman if (Op1 == 0) 427d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman // Unhandled operand. Halt "fast" selection and bail. 428bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman return false; 429bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman 430a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman bool Op1IsKill = hasTrivialKill(I->getOperand(1)); 431a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman 432ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman // Now we have both operands in registers. Emit the instruction. 4330f84e4e31009eecf2dfcbe6113b65d0919f30254Owen Anderson unsigned ResultReg = FastEmit_rr(VT.getSimpleVT(), VT.getSimpleVT(), 434a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman ISDOpcode, 435a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman Op0, Op0IsKill, 436a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman Op1, Op1IsKill); 437bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman if (ResultReg == 0) 438bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman // Target-specific code wasn't able to find a machine opcode for 439bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman // the given ISD opcode and type. Halt "fast" selection and bail. 440bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman return false; 441bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman 4428014e865800cc911697a4c0c42f077df9fcc9805Dan Gohman // We successfully emitted code for the given LLVM Instruction. 4433df24e667f04a7003342b534310919abc9c87418Dan Gohman UpdateValueMap(I, ResultReg); 444bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman return true; 445bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman} 446bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman 44746510a73e977273ec67747eb34cbdb43f815e451Dan Gohmanbool FastISel::SelectGetElementPtr(const User *I) { 4483df24e667f04a7003342b534310919abc9c87418Dan Gohman unsigned N = getRegForValue(I->getOperand(0)); 44983785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng if (N == 0) 45083785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // Unhandled operand. Halt "fast" selection and bail. 45183785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng return false; 45283785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng 453a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman bool NIsKill = hasTrivialKill(I->getOperand(0)); 454a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman 455478b06c9801f0b75c5216ce0886ac3d630d4fc7bChad Rosier // Keep a running tab of the total offset to coalesce multiple N = N + Offset 456478b06c9801f0b75c5216ce0886ac3d630d4fc7bChad Rosier // into a single N = N + TotalOffset. 457478b06c9801f0b75c5216ce0886ac3d630d4fc7bChad Rosier uint64_t TotalOffs = 0; 458478b06c9801f0b75c5216ce0886ac3d630d4fc7bChad Rosier // FIXME: What's a good SWAG number for MaxOffs? 459478b06c9801f0b75c5216ce0886ac3d630d4fc7bChad Rosier uint64_t MaxOffs = 2048; 460db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner Type *Ty = I->getOperand(0)->getType(); 461825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson MVT VT = TLI.getPointerTy(); 46246510a73e977273ec67747eb34cbdb43f815e451Dan Gohman for (GetElementPtrInst::const_op_iterator OI = I->op_begin()+1, 46346510a73e977273ec67747eb34cbdb43f815e451Dan Gohman E = I->op_end(); OI != E; ++OI) { 46446510a73e977273ec67747eb34cbdb43f815e451Dan Gohman const Value *Idx = *OI; 465db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner if (StructType *StTy = dyn_cast<StructType>(Ty)) { 46683785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng unsigned Field = cast<ConstantInt>(Idx)->getZExtValue(); 46783785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng if (Field) { 46883785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // N = N + Offset 469478b06c9801f0b75c5216ce0886ac3d630d4fc7bChad Rosier TotalOffs += TD.getStructLayout(StTy)->getElementOffset(Field); 470478b06c9801f0b75c5216ce0886ac3d630d4fc7bChad Rosier if (TotalOffs >= MaxOffs) { 471478b06c9801f0b75c5216ce0886ac3d630d4fc7bChad Rosier N = FastEmit_ri_(VT, ISD::ADD, N, NIsKill, TotalOffs, VT); 472478b06c9801f0b75c5216ce0886ac3d630d4fc7bChad Rosier if (N == 0) 473478b06c9801f0b75c5216ce0886ac3d630d4fc7bChad Rosier // Unhandled operand. Halt "fast" selection and bail. 474478b06c9801f0b75c5216ce0886ac3d630d4fc7bChad Rosier return false; 475478b06c9801f0b75c5216ce0886ac3d630d4fc7bChad Rosier NIsKill = true; 476478b06c9801f0b75c5216ce0886ac3d630d4fc7bChad Rosier TotalOffs = 0; 477478b06c9801f0b75c5216ce0886ac3d630d4fc7bChad Rosier } 47883785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng } 47983785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng Ty = StTy->getElementType(Field); 48083785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng } else { 48183785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng Ty = cast<SequentialType>(Ty)->getElementType(); 48283785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng 48383785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // If this is a constant subscript, handle it quickly. 48446510a73e977273ec67747eb34cbdb43f815e451Dan Gohman if (const ConstantInt *CI = dyn_cast<ConstantInt>(Idx)) { 485e368b460a206fafa0d31d5d059b1779b94f7df8cDan Gohman if (CI->isZero()) continue; 486478b06c9801f0b75c5216ce0886ac3d630d4fc7bChad Rosier // N = N + Offset 487478b06c9801f0b75c5216ce0886ac3d630d4fc7bChad Rosier TotalOffs += 488777d2306b36816a53bc1ae1244c0dc7d998ae691Duncan Sands TD.getTypeAllocSize(Ty)*cast<ConstantInt>(CI)->getSExtValue(); 489478b06c9801f0b75c5216ce0886ac3d630d4fc7bChad Rosier if (TotalOffs >= MaxOffs) { 490478b06c9801f0b75c5216ce0886ac3d630d4fc7bChad Rosier N = FastEmit_ri_(VT, ISD::ADD, N, NIsKill, TotalOffs, VT); 491478b06c9801f0b75c5216ce0886ac3d630d4fc7bChad Rosier if (N == 0) 492478b06c9801f0b75c5216ce0886ac3d630d4fc7bChad Rosier // Unhandled operand. Halt "fast" selection and bail. 493478b06c9801f0b75c5216ce0886ac3d630d4fc7bChad Rosier return false; 494478b06c9801f0b75c5216ce0886ac3d630d4fc7bChad Rosier NIsKill = true; 495478b06c9801f0b75c5216ce0886ac3d630d4fc7bChad Rosier TotalOffs = 0; 496478b06c9801f0b75c5216ce0886ac3d630d4fc7bChad Rosier } 497478b06c9801f0b75c5216ce0886ac3d630d4fc7bChad Rosier continue; 498478b06c9801f0b75c5216ce0886ac3d630d4fc7bChad Rosier } 499478b06c9801f0b75c5216ce0886ac3d630d4fc7bChad Rosier if (TotalOffs) { 500478b06c9801f0b75c5216ce0886ac3d630d4fc7bChad Rosier N = FastEmit_ri_(VT, ISD::ADD, N, NIsKill, TotalOffs, VT); 50183785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng if (N == 0) 50283785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // Unhandled operand. Halt "fast" selection and bail. 50383785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng return false; 504a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman NIsKill = true; 505478b06c9801f0b75c5216ce0886ac3d630d4fc7bChad Rosier TotalOffs = 0; 50683785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng } 507bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 50883785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // N = N + Idx * ElementSize; 509777d2306b36816a53bc1ae1244c0dc7d998ae691Duncan Sands uint64_t ElementSize = TD.getTypeAllocSize(Ty); 510a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman std::pair<unsigned, bool> Pair = getRegForGEPIndex(Idx); 511a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned IdxN = Pair.first; 512a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman bool IdxNIsKill = Pair.second; 51383785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng if (IdxN == 0) 51483785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // Unhandled operand. Halt "fast" selection and bail. 51583785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng return false; 51683785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng 51780bc6e2243b7ae99da42bf2e61df4ebccf8d8821Dan Gohman if (ElementSize != 1) { 518a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IdxN = FastEmit_ri_(VT, ISD::MUL, IdxN, IdxNIsKill, ElementSize, VT); 51980bc6e2243b7ae99da42bf2e61df4ebccf8d8821Dan Gohman if (IdxN == 0) 52080bc6e2243b7ae99da42bf2e61df4ebccf8d8821Dan Gohman // Unhandled operand. Halt "fast" selection and bail. 52180bc6e2243b7ae99da42bf2e61df4ebccf8d8821Dan Gohman return false; 522a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IdxNIsKill = true; 52380bc6e2243b7ae99da42bf2e61df4ebccf8d8821Dan Gohman } 524a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman N = FastEmit_rr(VT, VT, ISD::ADD, N, NIsKill, IdxN, IdxNIsKill); 52583785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng if (N == 0) 52683785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // Unhandled operand. Halt "fast" selection and bail. 52783785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng return false; 52883785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng } 52983785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng } 530478b06c9801f0b75c5216ce0886ac3d630d4fc7bChad Rosier if (TotalOffs) { 531478b06c9801f0b75c5216ce0886ac3d630d4fc7bChad Rosier N = FastEmit_ri_(VT, ISD::ADD, N, NIsKill, TotalOffs, VT); 532478b06c9801f0b75c5216ce0886ac3d630d4fc7bChad Rosier if (N == 0) 533478b06c9801f0b75c5216ce0886ac3d630d4fc7bChad Rosier // Unhandled operand. Halt "fast" selection and bail. 534478b06c9801f0b75c5216ce0886ac3d630d4fc7bChad Rosier return false; 535478b06c9801f0b75c5216ce0886ac3d630d4fc7bChad Rosier } 53683785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng 53783785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // We successfully emitted code for the given LLVM Instruction. 5383df24e667f04a7003342b534310919abc9c87418Dan Gohman UpdateValueMap(I, N); 53983785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng return true; 540bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman} 541bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman 54246510a73e977273ec67747eb34cbdb43f815e451Dan Gohmanbool FastISel::SelectCall(const User *I) { 543a61e73bda5125c28e48b52e573d115370838596bDan Gohman const CallInst *Call = cast<CallInst>(I); 544a61e73bda5125c28e48b52e573d115370838596bDan Gohman 545a61e73bda5125c28e48b52e573d115370838596bDan Gohman // Handle simple inline asms. 5469e15d658c99c3f0717cb83cc2bd2aa29abdbcdbbDan Gohman if (const InlineAsm *IA = dyn_cast<InlineAsm>(Call->getCalledValue())) { 547a61e73bda5125c28e48b52e573d115370838596bDan Gohman // Don't attempt to handle constraints. 548a61e73bda5125c28e48b52e573d115370838596bDan Gohman if (!IA->getConstraintString().empty()) 549a61e73bda5125c28e48b52e573d115370838596bDan Gohman return false; 550a61e73bda5125c28e48b52e573d115370838596bDan Gohman 551a61e73bda5125c28e48b52e573d115370838596bDan Gohman unsigned ExtraInfo = 0; 552a61e73bda5125c28e48b52e573d115370838596bDan Gohman if (IA->hasSideEffects()) 553a61e73bda5125c28e48b52e573d115370838596bDan Gohman ExtraInfo |= InlineAsm::Extra_HasSideEffects; 554a61e73bda5125c28e48b52e573d115370838596bDan Gohman if (IA->isAlignStack()) 555a61e73bda5125c28e48b52e573d115370838596bDan Gohman ExtraInfo |= InlineAsm::Extra_IsAlignStack; 556a61e73bda5125c28e48b52e573d115370838596bDan Gohman 557a61e73bda5125c28e48b52e573d115370838596bDan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, 558a61e73bda5125c28e48b52e573d115370838596bDan Gohman TII.get(TargetOpcode::INLINEASM)) 559a61e73bda5125c28e48b52e573d115370838596bDan Gohman .addExternalSymbol(IA->getAsmString().c_str()) 560a61e73bda5125c28e48b52e573d115370838596bDan Gohman .addImm(ExtraInfo); 561a61e73bda5125c28e48b52e573d115370838596bDan Gohman return true; 562a61e73bda5125c28e48b52e573d115370838596bDan Gohman } 563a61e73bda5125c28e48b52e573d115370838596bDan Gohman 564c9c137b463b953fbf8942f655d67f6dc1a0f7965Michael J. Spencer MachineModuleInfo &MMI = FuncInfo.MF->getMMI(); 565c9c137b463b953fbf8942f655d67f6dc1a0f7965Michael J. Spencer ComputeUsesVAFloatArgument(*Call, &MMI); 566c9c137b463b953fbf8942f655d67f6dc1a0f7965Michael J. Spencer 567a61e73bda5125c28e48b52e573d115370838596bDan Gohman const Function *F = Call->getCalledFunction(); 56833134c4a75558288d663267c8991f6bd37a530afDan Gohman if (!F) return false; 56933134c4a75558288d663267c8991f6bd37a530afDan Gohman 5704183e31978146ea529a87a2fc47b96aeb6cbe000Dan Gohman // Handle selected intrinsic function calls. 571832e4943598d821687cec79f512803c1ca03cff7Chris Lattner switch (F->getIntrinsicID()) { 57233134c4a75558288d663267c8991f6bd37a530afDan Gohman default: break; 5739b5d6b860c7264e1dd8c5b757dfb4458dccdc27eEric Christopher // At -O0 we don't care about the lifetime intrinsics. 5749b5d6b860c7264e1dd8c5b757dfb4458dccdc27eEric Christopher case Intrinsic::lifetime_start: 5759b5d6b860c7264e1dd8c5b757dfb4458dccdc27eEric Christopher case Intrinsic::lifetime_end: 5769b5d6b860c7264e1dd8c5b757dfb4458dccdc27eEric Christopher return true; 57792c1e126473dfa93eeb4c9a124af4fedb40f0d5bBill Wendling case Intrinsic::dbg_declare: { 578a61e73bda5125c28e48b52e573d115370838596bDan Gohman const DbgDeclareInst *DI = cast<DbgDeclareInst>(Call); 57902f0dbd97a9bc01528aa12c2f260d928683ab411Devang Patel if (!DIVariable(DI->getVariable()).Verify() || 580a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman !FuncInfo.MF->getMMI().hasDebugInfo()) 5817e1e31f467d87c834d8baf673929865907901313Devang Patel return true; 58292c1e126473dfa93eeb4c9a124af4fedb40f0d5bBill Wendling 58346510a73e977273ec67747eb34cbdb43f815e451Dan Gohman const Value *Address = DI->getAddress(); 5846fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel if (!Address || isa<UndefValue>(Address) || isa<AllocaInst>(Address)) 585dc9185657593b5c1db86cb95a04a68fc09194993Dale Johannesen return true; 5866fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel 5876fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel unsigned Reg = 0; 5886fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel unsigned Offset = 0; 5896fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel if (const Argument *Arg = dyn_cast<Argument>(Address)) { 5909aee335c23bec4f6d1b2cab3bca76231d7b0d556Devang Patel // Some arguments' frame index is recorded during argument lowering. 5919aee335c23bec4f6d1b2cab3bca76231d7b0d556Devang Patel Offset = FuncInfo.getArgumentFrameIndex(Arg); 5929aee335c23bec4f6d1b2cab3bca76231d7b0d556Devang Patel if (Offset) 5939aee335c23bec4f6d1b2cab3bca76231d7b0d556Devang Patel Reg = TRI.getFrameRegister(*FuncInfo.MF); 5944bafda9618f9dfa9edc8da08bb3001ef2d1a9b68Devang Patel } 5956fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel if (!Reg) 5966fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel Reg = getRegForValue(Address); 597bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 5986fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel if (Reg) 599bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, 6006fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel TII.get(TargetOpcode::DBG_VALUE)) 6016fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel .addReg(Reg, RegState::Debug).addImm(Offset) 6026fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel .addMetadata(DI->getVariable()); 60333134c4a75558288d663267c8991f6bd37a530afDan Gohman return true; 60492c1e126473dfa93eeb4c9a124af4fedb40f0d5bBill Wendling } 60545df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen case Intrinsic::dbg_value: { 606343b42e428079363ab09828734b2debfd7dbdc9eDale Johannesen // This form of DBG_VALUE is target-independent. 607a61e73bda5125c28e48b52e573d115370838596bDan Gohman const DbgValueInst *DI = cast<DbgValueInst>(Call); 608e837dead3c8dc3445ef6a0e2322179c57e264a13Evan Cheng const MCInstrDesc &II = TII.get(TargetOpcode::DBG_VALUE); 60946510a73e977273ec67747eb34cbdb43f815e451Dan Gohman const Value *V = DI->getValue(); 61045df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen if (!V) { 61145df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen // Currently the optimizer can produce this; insert an undef to 61245df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen // help debugging. Probably the optimizer should not do this. 61384023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 61484023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman .addReg(0U).addImm(DI->getOffset()) 61584023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman .addMetadata(DI->getVariable()); 61646510a73e977273ec67747eb34cbdb43f815e451Dan Gohman } else if (const ConstantInt *CI = dyn_cast<ConstantInt>(V)) { 6178594d429e02c688d428036f8563f09572da3fbffDevang Patel if (CI->getBitWidth() > 64) 6188594d429e02c688d428036f8563f09572da3fbffDevang Patel BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 6198594d429e02c688d428036f8563f09572da3fbffDevang Patel .addCImm(CI).addImm(DI->getOffset()) 6208594d429e02c688d428036f8563f09572da3fbffDevang Patel .addMetadata(DI->getVariable()); 6218594d429e02c688d428036f8563f09572da3fbffDevang Patel else 6228594d429e02c688d428036f8563f09572da3fbffDevang Patel BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 6238594d429e02c688d428036f8563f09572da3fbffDevang Patel .addImm(CI->getZExtValue()).addImm(DI->getOffset()) 6248594d429e02c688d428036f8563f09572da3fbffDevang Patel .addMetadata(DI->getVariable()); 62546510a73e977273ec67747eb34cbdb43f815e451Dan Gohman } else if (const ConstantFP *CF = dyn_cast<ConstantFP>(V)) { 62684023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 62784023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman .addFPImm(CF).addImm(DI->getOffset()) 62884023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman .addMetadata(DI->getVariable()); 62945df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen } else if (unsigned Reg = lookUpRegForValue(V)) { 63084023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 63184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman .addReg(Reg, RegState::Debug).addImm(DI->getOffset()) 63284023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman .addMetadata(DI->getVariable()); 63345df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen } else { 63445df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen // We can't yet handle anything else here because it would require 63545df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen // generating code, thus altering codegen because of debug info. 636afeaae7a940ce16e7874af31f3e5e91d8ca89e19Devang Patel DEBUG(dbgs() << "Dropping debug info for " << DI); 637bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck } 63845df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen return true; 63945df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen } 640d0118a2371f35faa6af97e67be69e1debc615c42Eli Friedman case Intrinsic::objectsize: { 641d0118a2371f35faa6af97e67be69e1debc615c42Eli Friedman ConstantInt *CI = cast<ConstantInt>(Call->getArgOperand(1)); 642d0118a2371f35faa6af97e67be69e1debc615c42Eli Friedman unsigned long long Res = CI->isZero() ? -1ULL : 0; 643d0118a2371f35faa6af97e67be69e1debc615c42Eli Friedman Constant *ResCI = ConstantInt::get(Call->getType(), Res); 644d0118a2371f35faa6af97e67be69e1debc615c42Eli Friedman unsigned ResultReg = getRegForValue(ResCI); 645d0118a2371f35faa6af97e67be69e1debc615c42Eli Friedman if (ResultReg == 0) 646d0118a2371f35faa6af97e67be69e1debc615c42Eli Friedman return false; 647d0118a2371f35faa6af97e67be69e1debc615c42Eli Friedman UpdateValueMap(Call, ResultReg); 648d0118a2371f35faa6af97e67be69e1debc615c42Eli Friedman return true; 649d0118a2371f35faa6af97e67be69e1debc615c42Eli Friedman } 65033134c4a75558288d663267c8991f6bd37a530afDan Gohman } 6514183e31978146ea529a87a2fc47b96aeb6cbe000Dan Gohman 65274af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin // Usually, it does not make sense to initialize a value, 65374af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin // make an unrelated function call and use the value, because 65474af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin // it tends to be spilled on the stack. So, we move the pointer 65574af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin // to the last local value to the beginning of the block, so that 65674af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin // all the values which have already been materialized, 65774af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin // appear after the call. It also makes sense to skip intrinsics 65874af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin // since they tend to be inlined. 65974af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin if (!isa<IntrinsicInst>(F)) 66074af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin flushLocalValueMap(); 66174af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin 6624183e31978146ea529a87a2fc47b96aeb6cbe000Dan Gohman // An arbitrary call. Bail. 66333134c4a75558288d663267c8991f6bd37a530afDan Gohman return false; 66433134c4a75558288d663267c8991f6bd37a530afDan Gohman} 66533134c4a75558288d663267c8991f6bd37a530afDan Gohman 66646510a73e977273ec67747eb34cbdb43f815e451Dan Gohmanbool FastISel::SelectCast(const User *I, unsigned Opcode) { 667e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT SrcVT = TLI.getValueType(I->getOperand(0)->getType()); 668e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT DstVT = TLI.getValueType(I->getType()); 669bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 670825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson if (SrcVT == MVT::Other || !SrcVT.isSimple() || 671825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson DstVT == MVT::Other || !DstVT.isSimple()) 672d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson // Unhandled type. Halt "fast" selection and bail. 673d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson return false; 674bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 67576927d7303046058c627691bd45d6bff608f49f4Eli Friedman // Check if the destination type is legal. 676474d3b3f40e117a66946e9fb9d2016b4c05caef0Dan Gohman if (!TLI.isTypeLegal(DstVT)) 67776927d7303046058c627691bd45d6bff608f49f4Eli Friedman return false; 678474d3b3f40e117a66946e9fb9d2016b4c05caef0Dan Gohman 67976927d7303046058c627691bd45d6bff608f49f4Eli Friedman // Check if the source operand is legal. 680474d3b3f40e117a66946e9fb9d2016b4c05caef0Dan Gohman if (!TLI.isTypeLegal(SrcVT)) 68176927d7303046058c627691bd45d6bff608f49f4Eli Friedman return false; 682474d3b3f40e117a66946e9fb9d2016b4c05caef0Dan Gohman 6833df24e667f04a7003342b534310919abc9c87418Dan Gohman unsigned InputReg = getRegForValue(I->getOperand(0)); 684d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson if (!InputReg) 685d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson // Unhandled operand. Halt "fast" selection and bail. 686d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson return false; 68714ea1ec2324cb595f2e035bbf54ddcd483f17c11Dan Gohman 688a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman bool InputRegIsKill = hasTrivialKill(I->getOperand(0)); 689a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman 690d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson unsigned ResultReg = FastEmit_r(SrcVT.getSimpleVT(), 691d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson DstVT.getSimpleVT(), 692d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson Opcode, 693a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman InputReg, InputRegIsKill); 694d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson if (!ResultReg) 695d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson return false; 696bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 6973df24e667f04a7003342b534310919abc9c87418Dan Gohman UpdateValueMap(I, ResultReg); 698d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson return true; 699d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson} 700d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson 70146510a73e977273ec67747eb34cbdb43f815e451Dan Gohmanbool FastISel::SelectBitCast(const User *I) { 702ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman // If the bitcast doesn't change the type, just use the operand value. 703ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman if (I->getType() == I->getOperand(0)->getType()) { 7043df24e667f04a7003342b534310919abc9c87418Dan Gohman unsigned Reg = getRegForValue(I->getOperand(0)); 705a318dabc0edbcc7a2b54d99b026a093361ec14fcDan Gohman if (Reg == 0) 706a318dabc0edbcc7a2b54d99b026a093361ec14fcDan Gohman return false; 7073df24e667f04a7003342b534310919abc9c87418Dan Gohman UpdateValueMap(I, Reg); 708ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman return true; 709ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman } 710ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman 711bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck // Bitcasts of other values become reg-reg copies or BITCAST operators. 712e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT SrcVT = TLI.getValueType(I->getOperand(0)->getType()); 713e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT DstVT = TLI.getValueType(I->getType()); 714bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 715825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson if (SrcVT == MVT::Other || !SrcVT.isSimple() || 716825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson DstVT == MVT::Other || !DstVT.isSimple() || 717d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson !TLI.isTypeLegal(SrcVT) || !TLI.isTypeLegal(DstVT)) 718d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson // Unhandled type. Halt "fast" selection and bail. 719d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson return false; 720bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 7213df24e667f04a7003342b534310919abc9c87418Dan Gohman unsigned Op0 = getRegForValue(I->getOperand(0)); 722ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman if (Op0 == 0) 723ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman // Unhandled operand. Halt "fast" selection and bail. 724d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson return false; 725a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman 726a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman bool Op0IsKill = hasTrivialKill(I->getOperand(0)); 727bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 728ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman // First, try to perform the bitcast by inserting a reg-reg copy. 729ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman unsigned ResultReg = 0; 730ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman if (SrcVT.getSimpleVT() == DstVT.getSimpleVT()) { 73144d23825d61d530b8d562329ec8fc2d4f843bb8dCraig Topper const TargetRegisterClass* SrcClass = TLI.getRegClassFor(SrcVT); 73244d23825d61d530b8d562329ec8fc2d4f843bb8dCraig Topper const TargetRegisterClass* DstClass = TLI.getRegClassFor(DstVT); 733e7917bb207d5178dfb26066f839e4c295fd3a1ebJakob Stoklund Olesen // Don't attempt a cross-class copy. It will likely fail. 734e7917bb207d5178dfb26066f839e4c295fd3a1ebJakob Stoklund Olesen if (SrcClass == DstClass) { 735e7917bb207d5178dfb26066f839e4c295fd3a1ebJakob Stoklund Olesen ResultReg = createResultReg(DstClass); 736e7917bb207d5178dfb26066f839e4c295fd3a1ebJakob Stoklund Olesen BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 737e7917bb207d5178dfb26066f839e4c295fd3a1ebJakob Stoklund Olesen ResultReg).addReg(Op0); 738e7917bb207d5178dfb26066f839e4c295fd3a1ebJakob Stoklund Olesen } 739ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman } 740bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 741bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck // If the reg-reg copy failed, select a BITCAST opcode. 742ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman if (!ResultReg) 743ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman ResultReg = FastEmit_r(SrcVT.getSimpleVT(), DstVT.getSimpleVT(), 744bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck ISD::BITCAST, Op0, Op0IsKill); 745bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 746ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman if (!ResultReg) 747d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson return false; 748bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 7493df24e667f04a7003342b534310919abc9c87418Dan Gohman UpdateValueMap(I, ResultReg); 750d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson return true; 751d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson} 752d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson 7533df24e667f04a7003342b534310919abc9c87418Dan Gohmanbool 75446510a73e977273ec67747eb34cbdb43f815e451Dan GohmanFastISel::SelectInstruction(const Instruction *I) { 755e8c92dd439581bec7e3516cbdbea74e2e60fe7f0Dan Gohman // Just before the terminator instruction, insert instructions to 756e8c92dd439581bec7e3516cbdbea74e2e60fe7f0Dan Gohman // feed PHI nodes in successor blocks. 757e8c92dd439581bec7e3516cbdbea74e2e60fe7f0Dan Gohman if (isa<TerminatorInst>(I)) 758e8c92dd439581bec7e3516cbdbea74e2e60fe7f0Dan Gohman if (!HandlePHINodesInSuccessorBlocks(I->getParent())) 759e8c92dd439581bec7e3516cbdbea74e2e60fe7f0Dan Gohman return false; 760e8c92dd439581bec7e3516cbdbea74e2e60fe7f0Dan Gohman 7618ba3aa7f9c5048c31172788f98ad2b90ffad565aDan Gohman DL = I->getDebugLoc(); 7628ba3aa7f9c5048c31172788f98ad2b90ffad565aDan Gohman 763ae6f2cb1fc520aa56777dab1e7603aee9429f6ddChad Rosier MachineBasicBlock::iterator SavedInsertPt = FuncInfo.InsertPt; 764ae6f2cb1fc520aa56777dab1e7603aee9429f6ddChad Rosier 7656e3ff375474c4fd78feb0b8463eb273a23cb4404Dan Gohman // First, try doing target-independent selection. 7668ba3aa7f9c5048c31172788f98ad2b90ffad565aDan Gohman if (SelectOperator(I, I->getOpcode())) { 767053e69ad5704a8e0e5f50d8b18f8917377ffacfbChad Rosier ++NumFastIselSuccessIndependent; 7688ba3aa7f9c5048c31172788f98ad2b90ffad565aDan Gohman DL = DebugLoc(); 7696e3ff375474c4fd78feb0b8463eb273a23cb4404Dan Gohman return true; 7708ba3aa7f9c5048c31172788f98ad2b90ffad565aDan Gohman } 771ae6f2cb1fc520aa56777dab1e7603aee9429f6ddChad Rosier // Remove dead code. However, ignore call instructions since we've flushed 772ae6f2cb1fc520aa56777dab1e7603aee9429f6ddChad Rosier // the local value map and recomputed the insert point. 773ae6f2cb1fc520aa56777dab1e7603aee9429f6ddChad Rosier if (!isa<CallInst>(I)) { 774ae6f2cb1fc520aa56777dab1e7603aee9429f6ddChad Rosier recomputeInsertPt(); 775ae6f2cb1fc520aa56777dab1e7603aee9429f6ddChad Rosier if (SavedInsertPt != FuncInfo.InsertPt) 776ae6f2cb1fc520aa56777dab1e7603aee9429f6ddChad Rosier removeDeadCode(FuncInfo.InsertPt, SavedInsertPt); 777ae6f2cb1fc520aa56777dab1e7603aee9429f6ddChad Rosier } 7786e3ff375474c4fd78feb0b8463eb273a23cb4404Dan Gohman 7796e3ff375474c4fd78feb0b8463eb273a23cb4404Dan Gohman // Next, try calling the target to attempt to handle the instruction. 780ae6f2cb1fc520aa56777dab1e7603aee9429f6ddChad Rosier SavedInsertPt = FuncInfo.InsertPt; 7818ba3aa7f9c5048c31172788f98ad2b90ffad565aDan Gohman if (TargetSelectInstruction(I)) { 782053e69ad5704a8e0e5f50d8b18f8917377ffacfbChad Rosier ++NumFastIselSuccessTarget; 7838ba3aa7f9c5048c31172788f98ad2b90ffad565aDan Gohman DL = DebugLoc(); 7846e3ff375474c4fd78feb0b8463eb273a23cb4404Dan Gohman return true; 7858ba3aa7f9c5048c31172788f98ad2b90ffad565aDan Gohman } 786ae6f2cb1fc520aa56777dab1e7603aee9429f6ddChad Rosier // Check for dead code and remove as necessary. 787ae6f2cb1fc520aa56777dab1e7603aee9429f6ddChad Rosier recomputeInsertPt(); 788ae6f2cb1fc520aa56777dab1e7603aee9429f6ddChad Rosier if (SavedInsertPt != FuncInfo.InsertPt) 789ae6f2cb1fc520aa56777dab1e7603aee9429f6ddChad Rosier removeDeadCode(FuncInfo.InsertPt, SavedInsertPt); 7906e3ff375474c4fd78feb0b8463eb273a23cb4404Dan Gohman 7918ba3aa7f9c5048c31172788f98ad2b90ffad565aDan Gohman DL = DebugLoc(); 7926e3ff375474c4fd78feb0b8463eb273a23cb4404Dan Gohman return false; 79340b189e4e257924d90aaf63bf2e12bc7bbca961aDan Gohman} 79440b189e4e257924d90aaf63bf2e12bc7bbca961aDan Gohman 795d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohman/// FastEmitBranch - Emit an unconditional branch to the given block, 796d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohman/// unless it is the immediate (fall-through) successor, and update 797d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohman/// the CFG. 798d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohmanvoid 7993bf912593301152b65accb9d9c37a95172f1df5aStuart HastingsFastISel::FastEmitBranch(MachineBasicBlock *MSucc, DebugLoc DL) { 80084023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman if (FuncInfo.MBB->isLayoutSuccessor(MSucc)) { 801d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohman // The unconditional fall-through case, which needs no instructions. 802d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohman } else { 803d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohman // The unconditional branch case. 80484023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman TII.InsertBranch(*FuncInfo.MBB, MSucc, NULL, 80584023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman SmallVector<MachineOperand, 0>(), DL); 806d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohman } 80784023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman FuncInfo.MBB->addSuccessor(MSucc); 808d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohman} 809d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohman 8103d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman/// SelectFNeg - Emit an FNeg operation. 8113d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman/// 8123d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohmanbool 81346510a73e977273ec67747eb34cbdb43f815e451Dan GohmanFastISel::SelectFNeg(const User *I) { 8143d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman unsigned OpReg = getRegForValue(BinaryOperator::getFNegArgument(I)); 8153d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman if (OpReg == 0) return false; 8163d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman 817a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman bool OpRegIsKill = hasTrivialKill(I); 818a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman 8194a215a13c3035a8818254b61267be77def4a2a37Dan Gohman // If the target has ISD::FNEG, use it. 8204a215a13c3035a8818254b61267be77def4a2a37Dan Gohman EVT VT = TLI.getValueType(I->getType()); 8214a215a13c3035a8818254b61267be77def4a2a37Dan Gohman unsigned ResultReg = FastEmit_r(VT.getSimpleVT(), VT.getSimpleVT(), 822a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman ISD::FNEG, OpReg, OpRegIsKill); 8234a215a13c3035a8818254b61267be77def4a2a37Dan Gohman if (ResultReg != 0) { 8244a215a13c3035a8818254b61267be77def4a2a37Dan Gohman UpdateValueMap(I, ResultReg); 8254a215a13c3035a8818254b61267be77def4a2a37Dan Gohman return true; 8264a215a13c3035a8818254b61267be77def4a2a37Dan Gohman } 8274a215a13c3035a8818254b61267be77def4a2a37Dan Gohman 8285e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman // Bitcast the value to integer, twiddle the sign bit with xor, 8295e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman // and then bitcast it back to floating-point. 8303d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman if (VT.getSizeInBits() > 64) return false; 8315e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman EVT IntVT = EVT::getIntegerVT(I->getContext(), VT.getSizeInBits()); 8325e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman if (!TLI.isTypeLegal(IntVT)) 8335e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman return false; 8345e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman 8355e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman unsigned IntReg = FastEmit_r(VT.getSimpleVT(), IntVT.getSimpleVT(), 836bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck ISD::BITCAST, OpReg, OpRegIsKill); 8375e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman if (IntReg == 0) 8385e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman return false; 8395e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman 840a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned IntResultReg = FastEmit_ri_(IntVT.getSimpleVT(), ISD::XOR, 841a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IntReg, /*Kill=*/true, 8425e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman UINT64_C(1) << (VT.getSizeInBits()-1), 8435e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman IntVT.getSimpleVT()); 8445e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman if (IntResultReg == 0) 8455e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman return false; 8465e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman 8475e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman ResultReg = FastEmit_r(IntVT.getSimpleVT(), VT.getSimpleVT(), 848bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck ISD::BITCAST, IntResultReg, /*Kill=*/true); 8493d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman if (ResultReg == 0) 8503d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman return false; 8513d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman 8523d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman UpdateValueMap(I, ResultReg); 8533d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman return true; 8543d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman} 8553d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman 85640b189e4e257924d90aaf63bf2e12bc7bbca961aDan Gohmanbool 8572586b8f9366aed5a1efa44d3f18d095511601642Eli FriedmanFastISel::SelectExtractValue(const User *U) { 8582586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman const ExtractValueInst *EVI = dyn_cast<ExtractValueInst>(U); 859a4c920db7a3620f365144eac9aaad7ca23062caaEli Friedman if (!EVI) 8602586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman return false; 8612586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman 862482feb33b2bba677d47bab859d9e1e95d67016bdEli Friedman // Make sure we only try to handle extracts with a legal result. But also 863482feb33b2bba677d47bab859d9e1e95d67016bdEli Friedman // allow i1 because it's easy. 8642586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman EVT RealVT = TLI.getValueType(EVI->getType(), /*AllowUnknown=*/true); 8652586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman if (!RealVT.isSimple()) 8662586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman return false; 8672586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman MVT VT = RealVT.getSimpleVT(); 868482feb33b2bba677d47bab859d9e1e95d67016bdEli Friedman if (!TLI.isTypeLegal(VT) && VT != MVT::i1) 8692586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman return false; 8702586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman 8712586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman const Value *Op0 = EVI->getOperand(0); 872db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner Type *AggTy = Op0->getType(); 8732586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman 8742586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman // Get the base result register. 8752586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman unsigned ResultReg; 8762586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman DenseMap<const Value *, unsigned>::iterator I = FuncInfo.ValueMap.find(Op0); 8772586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman if (I != FuncInfo.ValueMap.end()) 8782586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman ResultReg = I->second; 8790b4d96baecf3fe6af0fd45ba815bacf91a017f97Eli Friedman else if (isa<Instruction>(Op0)) 8802586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman ResultReg = FuncInfo.InitializeRegForValue(Op0); 8810b4d96baecf3fe6af0fd45ba815bacf91a017f97Eli Friedman else 8820b4d96baecf3fe6af0fd45ba815bacf91a017f97Eli Friedman return false; // fast-isel can't handle aggregate constants at the moment 8832586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman 8842586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman // Get the actual result register, which is an offset from the base register. 885fc6d3a49867cd38954dc40936a88f1907252c6d2Jay Foad unsigned VTIndex = ComputeLinearIndex(AggTy, EVI->getIndices()); 8862586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman 8872586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman SmallVector<EVT, 4> AggValueVTs; 8882586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman ComputeValueVTs(TLI, AggTy, AggValueVTs); 8892586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman 8902586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman for (unsigned i = 0; i < VTIndex; i++) 8912586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman ResultReg += TLI.getNumRegisters(FuncInfo.Fn->getContext(), AggValueVTs[i]); 8922586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman 8932586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman UpdateValueMap(EVI, ResultReg); 8942586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman return true; 8952586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman} 8962586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman 8972586b8f9366aed5a1efa44d3f18d095511601642Eli Friedmanbool 89846510a73e977273ec67747eb34cbdb43f815e451Dan GohmanFastISel::SelectOperator(const User *I, unsigned Opcode) { 89940b189e4e257924d90aaf63bf2e12bc7bbca961aDan Gohman switch (Opcode) { 900ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman case Instruction::Add: 901ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman return SelectBinaryOp(I, ISD::ADD); 902ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman case Instruction::FAdd: 903ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman return SelectBinaryOp(I, ISD::FADD); 904ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman case Instruction::Sub: 905ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman return SelectBinaryOp(I, ISD::SUB); 906ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman case Instruction::FSub: 9073d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman // FNeg is currently represented in LLVM IR as a special case of FSub. 9083d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman if (BinaryOperator::isFNeg(I)) 9093d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman return SelectFNeg(I); 910ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman return SelectBinaryOp(I, ISD::FSUB); 911ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman case Instruction::Mul: 912ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman return SelectBinaryOp(I, ISD::MUL); 913ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman case Instruction::FMul: 914ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman return SelectBinaryOp(I, ISD::FMUL); 9153df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::SDiv: 9163df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::SDIV); 9173df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::UDiv: 9183df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::UDIV); 9193df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::FDiv: 9203df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::FDIV); 9213df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::SRem: 9223df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::SREM); 9233df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::URem: 9243df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::UREM); 9253df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::FRem: 9263df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::FREM); 9273df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::Shl: 9283df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::SHL); 9293df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::LShr: 9303df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::SRL); 9313df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::AShr: 9323df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::SRA); 9333df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::And: 9343df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::AND); 9353df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::Or: 9363df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::OR); 9373df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::Xor: 9383df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::XOR); 9393df24e667f04a7003342b534310919abc9c87418Dan Gohman 9403df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::GetElementPtr: 9413df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectGetElementPtr(I); 9423df24e667f04a7003342b534310919abc9c87418Dan Gohman 9433df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::Br: { 94446510a73e977273ec67747eb34cbdb43f815e451Dan Gohman const BranchInst *BI = cast<BranchInst>(I); 9453df24e667f04a7003342b534310919abc9c87418Dan Gohman 9463df24e667f04a7003342b534310919abc9c87418Dan Gohman if (BI->isUnconditional()) { 94746510a73e977273ec67747eb34cbdb43f815e451Dan Gohman const BasicBlock *LLVMSucc = BI->getSuccessor(0); 948a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman MachineBasicBlock *MSucc = FuncInfo.MBBMap[LLVMSucc]; 9493bf912593301152b65accb9d9c37a95172f1df5aStuart Hastings FastEmitBranch(MSucc, BI->getDebugLoc()); 9503df24e667f04a7003342b534310919abc9c87418Dan Gohman return true; 9519d5b41624003daf259b33fc953aa471049700353Owen Anderson } 9523df24e667f04a7003342b534310919abc9c87418Dan Gohman 9533df24e667f04a7003342b534310919abc9c87418Dan Gohman // Conditional branches are not handed yet. 9543df24e667f04a7003342b534310919abc9c87418Dan Gohman // Halt "fast" selection and bail. 9553df24e667f04a7003342b534310919abc9c87418Dan Gohman return false; 956b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman } 957b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 958087c8507e592bbbede1746f07bd44b28559e3684Dan Gohman case Instruction::Unreachable: 959087c8507e592bbbede1746f07bd44b28559e3684Dan Gohman // Nothing to emit. 960087c8507e592bbbede1746f07bd44b28559e3684Dan Gohman return true; 961087c8507e592bbbede1746f07bd44b28559e3684Dan Gohman 9620586d91bb3e516d5826826522d9a90ed6ef74d86Dan Gohman case Instruction::Alloca: 9630586d91bb3e516d5826826522d9a90ed6ef74d86Dan Gohman // FunctionLowering has the static-sized case covered. 964a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman if (FuncInfo.StaticAllocaMap.count(cast<AllocaInst>(I))) 9650586d91bb3e516d5826826522d9a90ed6ef74d86Dan Gohman return true; 9660586d91bb3e516d5826826522d9a90ed6ef74d86Dan Gohman 9670586d91bb3e516d5826826522d9a90ed6ef74d86Dan Gohman // Dynamic-sized alloca is not handled yet. 9680586d91bb3e516d5826826522d9a90ed6ef74d86Dan Gohman return false; 969bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 97033134c4a75558288d663267c8991f6bd37a530afDan Gohman case Instruction::Call: 97133134c4a75558288d663267c8991f6bd37a530afDan Gohman return SelectCall(I); 972bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 9733df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::BitCast: 9743df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBitCast(I); 9753df24e667f04a7003342b534310919abc9c87418Dan Gohman 9763df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::FPToSI: 9773df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectCast(I, ISD::FP_TO_SINT); 9783df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::ZExt: 9793df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectCast(I, ISD::ZERO_EXTEND); 9803df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::SExt: 9813df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectCast(I, ISD::SIGN_EXTEND); 9823df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::Trunc: 9833df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectCast(I, ISD::TRUNCATE); 9843df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::SIToFP: 9853df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectCast(I, ISD::SINT_TO_FP); 9863df24e667f04a7003342b534310919abc9c87418Dan Gohman 9873df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::IntToPtr: // Deliberate fall-through. 9883df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::PtrToInt: { 989e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT SrcVT = TLI.getValueType(I->getOperand(0)->getType()); 990e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT DstVT = TLI.getValueType(I->getType()); 9913df24e667f04a7003342b534310919abc9c87418Dan Gohman if (DstVT.bitsGT(SrcVT)) 9923df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectCast(I, ISD::ZERO_EXTEND); 9933df24e667f04a7003342b534310919abc9c87418Dan Gohman if (DstVT.bitsLT(SrcVT)) 9943df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectCast(I, ISD::TRUNCATE); 9953df24e667f04a7003342b534310919abc9c87418Dan Gohman unsigned Reg = getRegForValue(I->getOperand(0)); 9963df24e667f04a7003342b534310919abc9c87418Dan Gohman if (Reg == 0) return false; 9973df24e667f04a7003342b534310919abc9c87418Dan Gohman UpdateValueMap(I, Reg); 9983df24e667f04a7003342b534310919abc9c87418Dan Gohman return true; 9993df24e667f04a7003342b534310919abc9c87418Dan Gohman } 1000d57dd5f4e6740520820bc0fca42a540e31c27a73Dan Gohman 10012586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman case Instruction::ExtractValue: 10022586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman return SelectExtractValue(I); 10032586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman 1004ba5be5c07bb19dcf484e3aa40cd139dd07c10407Dan Gohman case Instruction::PHI: 1005ba5be5c07bb19dcf484e3aa40cd139dd07c10407Dan Gohman llvm_unreachable("FastISel shouldn't visit PHI nodes!"); 1006ba5be5c07bb19dcf484e3aa40cd139dd07c10407Dan Gohman 10073df24e667f04a7003342b534310919abc9c87418Dan Gohman default: 10083df24e667f04a7003342b534310919abc9c87418Dan Gohman // Unhandled instruction. Halt "fast" selection and bail. 10093df24e667f04a7003342b534310919abc9c87418Dan Gohman return false; 10103df24e667f04a7003342b534310919abc9c87418Dan Gohman } 1011b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman} 1012b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 1013a4160c3434b08288d1f79f1acbe453d1b9610b22Dan GohmanFastISel::FastISel(FunctionLoweringInfo &funcInfo) 101484023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman : FuncInfo(funcInfo), 1015a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman MRI(FuncInfo.MF->getRegInfo()), 1016a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman MFI(*FuncInfo.MF->getFrameInfo()), 1017a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman MCP(*FuncInfo.MF->getConstantPool()), 1018a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman TM(FuncInfo.MF->getTarget()), 101922bb31103de3337f0bb74c7bee16d1817d4dca14Dan Gohman TD(*TM.getTargetData()), 102022bb31103de3337f0bb74c7bee16d1817d4dca14Dan Gohman TII(*TM.getInstrInfo()), 1021a7a0ed79012ea36f838239cf1d04959711aec2a9Dan Gohman TLI(*TM.getTargetLowering()), 102284023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman TRI(*TM.getRegisterInfo()) { 1023bb466331e7e50d03497ce40ee344870236fd9c32Dan Gohman} 1024bb466331e7e50d03497ce40ee344870236fd9c32Dan Gohman 1025e285a74f7cf9dd3ccf4fe758576cf83301f8a43eDan GohmanFastISel::~FastISel() {} 1026e285a74f7cf9dd3ccf4fe758576cf83301f8a43eDan Gohman 1027825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Andersonunsigned FastISel::FastEmit_(MVT, MVT, 10287c3ecb6838ef7a2ca306c0f3cd68022f0855ae71Dan Gohman unsigned) { 1029b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman return 0; 1030b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman} 1031b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 1032825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Andersonunsigned FastISel::FastEmit_r(MVT, MVT, 1033a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned, 1034a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned /*Op0*/, bool /*Op0IsKill*/) { 1035b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman return 0; 1036b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman} 1037b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 1038bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peckunsigned FastISel::FastEmit_rr(MVT, MVT, 1039a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned, 1040a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned /*Op0*/, bool /*Op0IsKill*/, 1041a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned /*Op1*/, bool /*Op1IsKill*/) { 1042b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman return 0; 1043b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman} 1044b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 10457c3ecb6838ef7a2ca306c0f3cd68022f0855ae71Dan Gohmanunsigned FastISel::FastEmit_i(MVT, MVT, unsigned, uint64_t /*Imm*/) { 104683785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng return 0; 104783785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng} 104883785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng 1049825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Andersonunsigned FastISel::FastEmit_f(MVT, MVT, 105046510a73e977273ec67747eb34cbdb43f815e451Dan Gohman unsigned, const ConstantFP * /*FPImm*/) { 105110df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman return 0; 105210df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman} 105310df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman 1054825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Andersonunsigned FastISel::FastEmit_ri(MVT, MVT, 1055a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned, 1056a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned /*Op0*/, bool /*Op0IsKill*/, 10570f84e4e31009eecf2dfcbe6113b65d0919f30254Owen Anderson uint64_t /*Imm*/) { 1058d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman return 0; 1059d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman} 1060d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman 1061825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Andersonunsigned FastISel::FastEmit_rf(MVT, MVT, 1062a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned, 1063a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned /*Op0*/, bool /*Op0IsKill*/, 106446510a73e977273ec67747eb34cbdb43f815e451Dan Gohman const ConstantFP * /*FPImm*/) { 106510df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman return 0; 106610df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman} 106710df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman 1068825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Andersonunsigned FastISel::FastEmit_rri(MVT, MVT, 10697c3ecb6838ef7a2ca306c0f3cd68022f0855ae71Dan Gohman unsigned, 1070a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned /*Op0*/, bool /*Op0IsKill*/, 1071a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned /*Op1*/, bool /*Op1IsKill*/, 1072d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman uint64_t /*Imm*/) { 107383785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng return 0; 107483785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng} 107583785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng 107683785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng/// FastEmit_ri_ - This method is a wrapper of FastEmit_ri. It first tries 107783785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng/// to emit an instruction with an immediate operand using FastEmit_ri. 107883785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng/// If that fails, it materializes the immediate into a register and try 107983785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng/// FastEmit_rr instead. 10807c3ecb6838ef7a2ca306c0f3cd68022f0855ae71Dan Gohmanunsigned FastISel::FastEmit_ri_(MVT VT, unsigned Opcode, 1081a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned Op0, bool Op0IsKill, 1082a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman uint64_t Imm, MVT ImmType) { 1083602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner // If this is a multiply by a power of two, emit this as a shift left. 1084602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner if (Opcode == ISD::MUL && isPowerOf2_64(Imm)) { 1085602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner Opcode = ISD::SHL; 1086602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner Imm = Log2_64(Imm); 1087090ca9108b35a60e8b97b67987d00cf47a383dbaChris Lattner } else if (Opcode == ISD::UDIV && isPowerOf2_64(Imm)) { 1088090ca9108b35a60e8b97b67987d00cf47a383dbaChris Lattner // div x, 8 -> srl x, 3 1089090ca9108b35a60e8b97b67987d00cf47a383dbaChris Lattner Opcode = ISD::SRL; 1090090ca9108b35a60e8b97b67987d00cf47a383dbaChris Lattner Imm = Log2_64(Imm); 1091602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner } 1092d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 1093602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner // Horrible hack (to be removed), check to make sure shift amounts are 1094602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner // in-range. 1095602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner if ((Opcode == ISD::SHL || Opcode == ISD::SRA || Opcode == ISD::SRL) && 1096602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner Imm >= VT.getSizeInBits()) 1097602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner return 0; 1098d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 109983785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // First check if immediate type is legal. If not, we can't use the ri form. 1100a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned ResultReg = FastEmit_ri(VT, VT, Opcode, Op0, Op0IsKill, Imm); 110183785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng if (ResultReg != 0) 110283785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng return ResultReg; 11030f84e4e31009eecf2dfcbe6113b65d0919f30254Owen Anderson unsigned MaterialReg = FastEmit_i(ImmType, ImmType, ISD::Constant, Imm); 1104b2b03fc2fa87cb5604dd8ec2e8476d051186cdb3Eli Friedman if (MaterialReg == 0) { 1105b2b03fc2fa87cb5604dd8ec2e8476d051186cdb3Eli Friedman // This is a bit ugly/slow, but failing here means falling out of 1106b2b03fc2fa87cb5604dd8ec2e8476d051186cdb3Eli Friedman // fast-isel, which would be very slow. 1107db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner IntegerType *ITy = IntegerType::get(FuncInfo.Fn->getContext(), 1108b2b03fc2fa87cb5604dd8ec2e8476d051186cdb3Eli Friedman VT.getSizeInBits()); 1109b2b03fc2fa87cb5604dd8ec2e8476d051186cdb3Eli Friedman MaterialReg = getRegForValue(ConstantInt::get(ITy, Imm)); 1110b2b03fc2fa87cb5604dd8ec2e8476d051186cdb3Eli Friedman } 1111a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman return FastEmit_rr(VT, VT, Opcode, 1112a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman Op0, Op0IsKill, 1113a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman MaterialReg, /*Kill=*/true); 1114d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman} 1115d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman 1116d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohmanunsigned FastISel::createResultReg(const TargetRegisterClass* RC) { 1117d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman return MRI.createVirtualRegister(RC); 111883785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng} 111983785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng 1120b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohmanunsigned FastISel::FastEmitInst_(unsigned MachineInstOpcode, 112177ad79689d755c49146f534107421cb3d9703fedDan Gohman const TargetRegisterClass* RC) { 1122d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman unsigned ResultReg = createResultReg(RC); 1123e837dead3c8dc3445ef6a0e2322179c57e264a13Evan Cheng const MCInstrDesc &II = TII.get(MachineInstOpcode); 1124b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 112584023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg); 1126b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman return ResultReg; 1127b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman} 1128b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 1129b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohmanunsigned FastISel::FastEmitInst_r(unsigned MachineInstOpcode, 1130b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman const TargetRegisterClass *RC, 1131a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned Op0, bool Op0IsKill) { 1132d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman unsigned ResultReg = createResultReg(RC); 1133e837dead3c8dc3445ef6a0e2322179c57e264a13Evan Cheng const MCInstrDesc &II = TII.get(MachineInstOpcode); 1134b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 11355960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng if (II.getNumDefs() >= 1) 113684023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg) 113784023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill); 11385960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng else { 113984023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 114084023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill); 1141e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 1142e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen ResultReg).addReg(II.ImplicitDefs[0]); 11435960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng } 11445960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng 1145b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman return ResultReg; 1146b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman} 1147b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 1148b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohmanunsigned FastISel::FastEmitInst_rr(unsigned MachineInstOpcode, 1149b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman const TargetRegisterClass *RC, 1150a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned Op0, bool Op0IsKill, 1151a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned Op1, bool Op1IsKill) { 1152d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman unsigned ResultReg = createResultReg(RC); 1153e837dead3c8dc3445ef6a0e2322179c57e264a13Evan Cheng const MCInstrDesc &II = TII.get(MachineInstOpcode); 1154b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 11555960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng if (II.getNumDefs() >= 1) 115684023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg) 1157a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill) 1158a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op1, Op1IsKill * RegState::Kill); 11595960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng else { 116084023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 1161a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill) 1162a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op1, Op1IsKill * RegState::Kill); 1163e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 1164e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen ResultReg).addReg(II.ImplicitDefs[0]); 11655960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng } 1166b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman return ResultReg; 1167b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman} 1168d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman 1169d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Andersonunsigned FastISel::FastEmitInst_rrr(unsigned MachineInstOpcode, 1170d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson const TargetRegisterClass *RC, 1171d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson unsigned Op0, bool Op0IsKill, 1172d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson unsigned Op1, bool Op1IsKill, 1173d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson unsigned Op2, bool Op2IsKill) { 1174d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson unsigned ResultReg = createResultReg(RC); 1175e837dead3c8dc3445ef6a0e2322179c57e264a13Evan Cheng const MCInstrDesc &II = TII.get(MachineInstOpcode); 1176d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson 1177d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson if (II.getNumDefs() >= 1) 1178d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg) 1179d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson .addReg(Op0, Op0IsKill * RegState::Kill) 1180d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson .addReg(Op1, Op1IsKill * RegState::Kill) 1181d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson .addReg(Op2, Op2IsKill * RegState::Kill); 1182d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson else { 1183d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 1184d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson .addReg(Op0, Op0IsKill * RegState::Kill) 1185d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson .addReg(Op1, Op1IsKill * RegState::Kill) 1186d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson .addReg(Op2, Op2IsKill * RegState::Kill); 1187d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 1188d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson ResultReg).addReg(II.ImplicitDefs[0]); 1189d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson } 1190d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson return ResultReg; 1191d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson} 1192d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson 1193d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohmanunsigned FastISel::FastEmitInst_ri(unsigned MachineInstOpcode, 1194d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman const TargetRegisterClass *RC, 1195a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned Op0, bool Op0IsKill, 1196a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman uint64_t Imm) { 1197d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman unsigned ResultReg = createResultReg(RC); 1198e837dead3c8dc3445ef6a0e2322179c57e264a13Evan Cheng const MCInstrDesc &II = TII.get(MachineInstOpcode); 1199d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman 12005960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng if (II.getNumDefs() >= 1) 120184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg) 1202a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill) 1203a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addImm(Imm); 12045960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng else { 120584023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 1206a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill) 1207a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addImm(Imm); 1208e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 1209e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen ResultReg).addReg(II.ImplicitDefs[0]); 12105960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng } 1211d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman return ResultReg; 1212d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman} 1213d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman 12142ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Andersonunsigned FastISel::FastEmitInst_rii(unsigned MachineInstOpcode, 12152ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson const TargetRegisterClass *RC, 12162ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson unsigned Op0, bool Op0IsKill, 12172ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson uint64_t Imm1, uint64_t Imm2) { 12182ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson unsigned ResultReg = createResultReg(RC); 1219e837dead3c8dc3445ef6a0e2322179c57e264a13Evan Cheng const MCInstrDesc &II = TII.get(MachineInstOpcode); 12202ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson 12212ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson if (II.getNumDefs() >= 1) 12222ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg) 12232ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson .addReg(Op0, Op0IsKill * RegState::Kill) 12242ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson .addImm(Imm1) 12252ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson .addImm(Imm2); 12262ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson else { 12272ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 12282ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson .addReg(Op0, Op0IsKill * RegState::Kill) 12292ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson .addImm(Imm1) 12302ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson .addImm(Imm2); 12312ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 12322ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson ResultReg).addReg(II.ImplicitDefs[0]); 12332ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson } 12342ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson return ResultReg; 12352ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson} 12362ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson 123710df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohmanunsigned FastISel::FastEmitInst_rf(unsigned MachineInstOpcode, 123810df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman const TargetRegisterClass *RC, 1239a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned Op0, bool Op0IsKill, 1240a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman const ConstantFP *FPImm) { 124110df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman unsigned ResultReg = createResultReg(RC); 1242e837dead3c8dc3445ef6a0e2322179c57e264a13Evan Cheng const MCInstrDesc &II = TII.get(MachineInstOpcode); 124310df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman 12445960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng if (II.getNumDefs() >= 1) 124584023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg) 1246a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill) 1247a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addFPImm(FPImm); 12485960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng else { 124984023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 1250a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill) 1251a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addFPImm(FPImm); 1252e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 1253e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen ResultReg).addReg(II.ImplicitDefs[0]); 12545960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng } 125510df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman return ResultReg; 125610df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman} 125710df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman 1258d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohmanunsigned FastISel::FastEmitInst_rri(unsigned MachineInstOpcode, 1259d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman const TargetRegisterClass *RC, 1260a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned Op0, bool Op0IsKill, 1261a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned Op1, bool Op1IsKill, 1262a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman uint64_t Imm) { 1263d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman unsigned ResultReg = createResultReg(RC); 1264e837dead3c8dc3445ef6a0e2322179c57e264a13Evan Cheng const MCInstrDesc &II = TII.get(MachineInstOpcode); 1265d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman 12665960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng if (II.getNumDefs() >= 1) 126784023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg) 1268a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill) 1269a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op1, Op1IsKill * RegState::Kill) 1270a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addImm(Imm); 12715960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng else { 127284023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 1273a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill) 1274a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op1, Op1IsKill * RegState::Kill) 1275a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addImm(Imm); 1276e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 1277e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen ResultReg).addReg(II.ImplicitDefs[0]); 12785960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng } 1279d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman return ResultReg; 1280d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman} 12816d0c25ec3a7ca822e68f73a4481eee43eb5c9485Owen Anderson 12826d0c25ec3a7ca822e68f73a4481eee43eb5c9485Owen Andersonunsigned FastISel::FastEmitInst_i(unsigned MachineInstOpcode, 12836d0c25ec3a7ca822e68f73a4481eee43eb5c9485Owen Anderson const TargetRegisterClass *RC, 12846d0c25ec3a7ca822e68f73a4481eee43eb5c9485Owen Anderson uint64_t Imm) { 12856d0c25ec3a7ca822e68f73a4481eee43eb5c9485Owen Anderson unsigned ResultReg = createResultReg(RC); 1286e837dead3c8dc3445ef6a0e2322179c57e264a13Evan Cheng const MCInstrDesc &II = TII.get(MachineInstOpcode); 1287bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 12885960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng if (II.getNumDefs() >= 1) 128984023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg).addImm(Imm); 12905960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng else { 129184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II).addImm(Imm); 1292e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 1293e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen ResultReg).addReg(II.ImplicitDefs[0]); 12945960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng } 12956d0c25ec3a7ca822e68f73a4481eee43eb5c9485Owen Anderson return ResultReg; 1296b41aec54767a825ac54c8822e787700bb08a3460Evan Cheng} 12978970f00deff00ffce1f35cf00883357e1582daa1Owen Anderson 1298d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Andersonunsigned FastISel::FastEmitInst_ii(unsigned MachineInstOpcode, 1299d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson const TargetRegisterClass *RC, 1300d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson uint64_t Imm1, uint64_t Imm2) { 1301d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson unsigned ResultReg = createResultReg(RC); 1302e837dead3c8dc3445ef6a0e2322179c57e264a13Evan Cheng const MCInstrDesc &II = TII.get(MachineInstOpcode); 1303d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 1304d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson if (II.getNumDefs() >= 1) 1305d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg) 1306d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson .addImm(Imm1).addImm(Imm2); 1307d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson else { 1308d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II).addImm(Imm1).addImm(Imm2); 1309d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 1310d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson ResultReg).addReg(II.ImplicitDefs[0]); 1311d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson } 1312d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson return ResultReg; 1313d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson} 1314d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 1315825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Andersonunsigned FastISel::FastEmitInst_extractsubreg(MVT RetVT, 1316a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned Op0, bool Op0IsKill, 1317a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman uint32_t Idx) { 1318536ab130ec95cbb7bf30530251dafa7dfecc8471Evan Cheng unsigned ResultReg = createResultReg(TLI.getRegClassFor(RetVT)); 13190bc25f40402f48ba42fc45403f635b20d90fabb3Jakob Stoklund Olesen assert(TargetRegisterInfo::isVirtualRegister(Op0) && 13200bc25f40402f48ba42fc45403f635b20d90fabb3Jakob Stoklund Olesen "Cannot yet extract from physregs"); 132184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, 132284023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman DL, TII.get(TargetOpcode::COPY), ResultReg) 13230bc25f40402f48ba42fc45403f635b20d90fabb3Jakob Stoklund Olesen .addReg(Op0, getKillRegState(Op0IsKill), Idx); 13248970f00deff00ffce1f35cf00883357e1582daa1Owen Anderson return ResultReg; 13258970f00deff00ffce1f35cf00883357e1582daa1Owen Anderson} 132614ea1ec2324cb595f2e035bbf54ddcd483f17c11Dan Gohman 132714ea1ec2324cb595f2e035bbf54ddcd483f17c11Dan Gohman/// FastEmitZExtFromI1 - Emit MachineInstrs to compute the value of Op 132814ea1ec2324cb595f2e035bbf54ddcd483f17c11Dan Gohman/// with all but the least significant bit set to zero. 1329a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohmanunsigned FastISel::FastEmitZExtFromI1(MVT VT, unsigned Op0, bool Op0IsKill) { 1330a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman return FastEmit_ri(VT, VT, ISD::AND, Op0, Op0IsKill, 1); 133114ea1ec2324cb595f2e035bbf54ddcd483f17c11Dan Gohman} 1332f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1333f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman/// HandlePHINodesInSuccessorBlocks - Handle PHI nodes in successor blocks. 1334f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman/// Emit code to ensure constants are copied into registers when needed. 1335f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman/// Remember the virtual registers that need to be added to the Machine PHI 1336f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman/// nodes as input. We cannot just directly add them, because expansion 1337f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman/// might result in multiple MBB's for one BB. As such, the start of the 1338f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman/// BB might correspond to a different MBB than the end. 1339f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohmanbool FastISel::HandlePHINodesInSuccessorBlocks(const BasicBlock *LLVMBB) { 1340f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman const TerminatorInst *TI = LLVMBB->getTerminator(); 1341f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1342f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman SmallPtrSet<MachineBasicBlock *, 4> SuccsHandled; 1343a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman unsigned OrigNumPHINodesToUpdate = FuncInfo.PHINodesToUpdate.size(); 1344f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1345f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // Check successor nodes' PHI nodes that expect a constant to be available 1346f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // from this block. 1347f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman for (unsigned succ = 0, e = TI->getNumSuccessors(); succ != e; ++succ) { 1348f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman const BasicBlock *SuccBB = TI->getSuccessor(succ); 1349f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman if (!isa<PHINode>(SuccBB->begin())) continue; 1350a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman MachineBasicBlock *SuccMBB = FuncInfo.MBBMap[SuccBB]; 1351f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1352f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // If this terminator has multiple identical successors (common for 1353f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // switches), only handle each succ once. 1354f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman if (!SuccsHandled.insert(SuccMBB)) continue; 1355f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1356f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman MachineBasicBlock::iterator MBBI = SuccMBB->begin(); 1357f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1358f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // At this point we know that there is a 1-1 correspondence between LLVM PHI 1359f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // nodes and Machine PHI nodes, but the incoming operands have not been 1360f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // emitted yet. 1361f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman for (BasicBlock::const_iterator I = SuccBB->begin(); 1362f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman const PHINode *PN = dyn_cast<PHINode>(I); ++I) { 1363fb95f89e8ebd0b71408472e2544e2b8d6d4738e5Dan Gohman 1364f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // Ignore dead phi's. 1365f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman if (PN->use_empty()) continue; 1366f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1367f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // Only handle legal types. Two interesting things to note here. First, 1368f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // by bailing out early, we may leave behind some dead instructions, 1369f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // since SelectionDAG's HandlePHINodesInSuccessorBlocks will insert its 13707a2bdde0a0eebcd2125055e0eacaca040f0b766cChris Lattner // own moves. Second, this check is necessary because FastISel doesn't 137189496d0eb73ab8771b27b3d9c1db6492d8eefc3aDan Gohman // use CreateRegs to create registers, so it always creates 1372f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // exactly one register for each non-void instruction. 1373f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman EVT VT = TLI.getValueType(PN->getType(), /*AllowUnknown=*/true); 1374f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman if (VT == MVT::Other || !TLI.isTypeLegal(VT)) { 13752f2d1d7ec0a0178c76c29a13ab39d3f33d9b097bChad Rosier // Handle integer promotions, though, because they're common and easy. 13762f2d1d7ec0a0178c76c29a13ab39d3f33d9b097bChad Rosier if (VT == MVT::i1 || VT == MVT::i8 || VT == MVT::i16) 1377f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman VT = TLI.getTypeToTransformTo(LLVMBB->getContext(), VT); 1378f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman else { 1379a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman FuncInfo.PHINodesToUpdate.resize(OrigNumPHINodesToUpdate); 1380f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman return false; 1381f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman } 1382f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman } 1383f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1384f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman const Value *PHIOp = PN->getIncomingValueForBlock(LLVMBB); 1385f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1386fb95f89e8ebd0b71408472e2544e2b8d6d4738e5Dan Gohman // Set the DebugLoc for the copy. Prefer the location of the operand 1387fb95f89e8ebd0b71408472e2544e2b8d6d4738e5Dan Gohman // if there is one; use the location of the PHI otherwise. 1388fb95f89e8ebd0b71408472e2544e2b8d6d4738e5Dan Gohman DL = PN->getDebugLoc(); 1389fb95f89e8ebd0b71408472e2544e2b8d6d4738e5Dan Gohman if (const Instruction *Inst = dyn_cast<Instruction>(PHIOp)) 1390fb95f89e8ebd0b71408472e2544e2b8d6d4738e5Dan Gohman DL = Inst->getDebugLoc(); 1391fb95f89e8ebd0b71408472e2544e2b8d6d4738e5Dan Gohman 1392f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman unsigned Reg = getRegForValue(PHIOp); 1393f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman if (Reg == 0) { 1394a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman FuncInfo.PHINodesToUpdate.resize(OrigNumPHINodesToUpdate); 1395f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman return false; 1396f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman } 1397a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman FuncInfo.PHINodesToUpdate.push_back(std::make_pair(MBBI++, Reg)); 1398fb95f89e8ebd0b71408472e2544e2b8d6d4738e5Dan Gohman DL = DebugLoc(); 1399f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman } 1400f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman } 1401f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1402f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman return true; 1403f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman} 1404