FastISel.cpp revision 053e69ad5704a8e0e5f50d8b18f8917377ffacfb
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 65053e69ad5704a8e0e5f50d8b18f8917377ffacfbChad RosierSTATISTIC(NumFastIselSuccessIndependent, "Number of insts selected by target-independent selector"); 66053e69ad5704a8e0e5f50d8b18f8917377ffacfbChad RosierSTATISTIC(NumFastIselSuccessTarget, "Number of insts selected by target-specific selector"); 67053e69ad5704a8e0e5f50d8b18f8917377ffacfbChad Rosier 6884023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman/// startNewBlock - Set the current block to which generated machine 6984023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman/// instructions will be appended, and clear the local CSE map. 7084023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman/// 7184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohmanvoid FastISel::startNewBlock() { 7284023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman LocalValueMap.clear(); 7384023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 7474af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin EmitStartPt = 0; 7584023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 7674af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin // Advance the emit start point past any EH_LABEL instructions. 7784023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman MachineBasicBlock::iterator 7884023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman I = FuncInfo.MBB->begin(), E = FuncInfo.MBB->end(); 7984023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman while (I != E && I->getOpcode() == TargetOpcode::EH_LABEL) { 8074af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin EmitStartPt = I; 8184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman ++I; 8284023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman } 8374af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin LastLocalValue = EmitStartPt; 8474af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin} 8574af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin 8674af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasinvoid FastISel::flushLocalValueMap() { 8774af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin LocalValueMap.clear(); 8874af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin LastLocalValue = EmitStartPt; 8974af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin recomputeInsertPt(); 9084023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman} 9184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 92a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohmanbool FastISel::hasTrivialKill(const Value *V) const { 937f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman // Don't consider constants or arguments to have trivial kills. 94a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman const Instruction *I = dyn_cast<Instruction>(V); 957f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman if (!I) 967f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman return false; 977f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman 987f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman // No-op casts are trivially coalesced by fast-isel. 997f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman if (const CastInst *Cast = dyn_cast<CastInst>(I)) 1007f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman if (Cast->isNoopCast(TD.getIntPtrType(Cast->getContext())) && 1017f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman !hasTrivialKill(Cast->getOperand(0))) 1027f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman return false; 1037f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman 10422b34cce4d270f787d4c991baee596a9e3b7f836Chad Rosier // GEPs with all zero indices are trivially coalesced by fast-isel. 10522b34cce4d270f787d4c991baee596a9e3b7f836Chad Rosier if (const GetElementPtrInst *GEP = dyn_cast<GetElementPtrInst>(I)) 10622b34cce4d270f787d4c991baee596a9e3b7f836Chad Rosier if (GEP->hasAllZeroIndices() && !hasTrivialKill(GEP->getOperand(0))) 10722b34cce4d270f787d4c991baee596a9e3b7f836Chad Rosier return false; 10822b34cce4d270f787d4c991baee596a9e3b7f836Chad Rosier 1097f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman // Only instructions with a single use in the same basic block are considered 1107f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman // to have trivial kills. 1117f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman return I->hasOneUse() && 1127f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman !(I->getOpcode() == Instruction::BitCast || 1137f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman I->getOpcode() == Instruction::PtrToInt || 1147f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman I->getOpcode() == Instruction::IntToPtr) && 11596f1d8ebdd33b3f9bdb3b1163f36072c68599f42Gabor Greif cast<Instruction>(*I->use_begin())->getParent() == I->getParent(); 116a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman} 117a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman 11846510a73e977273ec67747eb34cbdb43f815e451Dan Gohmanunsigned FastISel::getRegForValue(const Value *V) { 119e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT RealVT = TLI.getValueType(V->getType(), /*AllowUnknown=*/true); 1204fd552880c9f42f117bd79929ea0179f99bd6bb7Dan Gohman // Don't handle non-simple values in FastISel. 1214fd552880c9f42f117bd79929ea0179f99bd6bb7Dan Gohman if (!RealVT.isSimple()) 1224fd552880c9f42f117bd79929ea0179f99bd6bb7Dan Gohman return 0; 123821164875706dd28e48c6cc3cea5c8ffa6e658d1Dan Gohman 124c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman // Ignore illegal types. We must do this before looking up the value 125c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman // in ValueMap because Arguments are given virtual registers regardless 126c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman // of whether FastISel can handle them. 127825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson MVT VT = RealVT.getSimpleVT(); 128821164875706dd28e48c6cc3cea5c8ffa6e658d1Dan Gohman if (!TLI.isTypeLegal(VT)) { 12976927d7303046058c627691bd45d6bff608f49f4Eli Friedman // Handle integer promotions, though, because they're common and easy. 13076927d7303046058c627691bd45d6bff608f49f4Eli Friedman if (VT == MVT::i1 || VT == MVT::i8 || VT == MVT::i16) 13123b9b19b1a5a00faa9fce0788155c7dbfd00bfb1Owen Anderson VT = TLI.getTypeToTransformTo(V->getContext(), VT).getSimpleVT(); 132821164875706dd28e48c6cc3cea5c8ffa6e658d1Dan Gohman else 133821164875706dd28e48c6cc3cea5c8ffa6e658d1Dan Gohman return 0; 134821164875706dd28e48c6cc3cea5c8ffa6e658d1Dan Gohman } 135821164875706dd28e48c6cc3cea5c8ffa6e658d1Dan Gohman 136c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman // Look up the value to see if we already have a register for it. We 137c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman // cache values defined by Instructions across blocks, and other values 138c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman // only locally. This is because Instructions already have the SSA 1395c9cf19d1e7d044e786f03331bc3f004966a69d2Dan Gohman // def-dominates-use requirement enforced. 140a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman DenseMap<const Value *, unsigned>::iterator I = FuncInfo.ValueMap.find(V); 141fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner if (I != FuncInfo.ValueMap.end()) 142fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner return I->second; 143fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner 144c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman unsigned Reg = LocalValueMap[V]; 145c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman if (Reg != 0) 146c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman return Reg; 147c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman 14897c94b8fc630b55e17a37481910810639e28d086Dan Gohman // In bottom-up mode, just create the virtual register which will be used 14997c94b8fc630b55e17a37481910810639e28d086Dan Gohman // to hold the value. It will be materialized later. 15084023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman if (isa<Instruction>(V) && 15184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman (!isa<AllocaInst>(V) || 15284023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman !FuncInfo.StaticAllocaMap.count(cast<AllocaInst>(V)))) 15384023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman return FuncInfo.InitializeRegForValue(V); 15484023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 155a10b8494a50108482302f6f077d72fbc76d776edDan Gohman SavePoint SaveInsertPt = enterLocalValueArea(); 15684023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 15784023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman // Materialize the value in a register. Emit any instructions in the 15884023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman // local value area. 15984023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman Reg = materializeRegForValue(V, VT); 16084023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 16184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman leaveLocalValueArea(SaveInsertPt); 16297c94b8fc630b55e17a37481910810639e28d086Dan Gohman 16384023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman return Reg; 1641fdc614bee2a324fcc210d1e46d9b6fca3ca324bDan Gohman} 1651fdc614bee2a324fcc210d1e46d9b6fca3ca324bDan Gohman 16644a2c3476bd15e03f294bae1b50016851f214f8dEric Christopher/// materializeRegForValue - Helper for getRegForValue. This function is 1671fdc614bee2a324fcc210d1e46d9b6fca3ca324bDan Gohman/// called when the value isn't already available in a register and must 1681fdc614bee2a324fcc210d1e46d9b6fca3ca324bDan Gohman/// be materialized with new instructions. 1691fdc614bee2a324fcc210d1e46d9b6fca3ca324bDan Gohmanunsigned FastISel::materializeRegForValue(const Value *V, MVT VT) { 1701fdc614bee2a324fcc210d1e46d9b6fca3ca324bDan Gohman unsigned Reg = 0; 1711fdc614bee2a324fcc210d1e46d9b6fca3ca324bDan Gohman 17246510a73e977273ec67747eb34cbdb43f815e451Dan Gohman if (const ConstantInt *CI = dyn_cast<ConstantInt>(V)) { 1732ff7fd146159d97abe94391a33b4385abb06bbb0Dan Gohman if (CI->getValue().getActiveBits() <= 64) 1742ff7fd146159d97abe94391a33b4385abb06bbb0Dan Gohman Reg = FastEmit_i(VT, VT, ISD::Constant, CI->getZExtValue()); 1750586d91bb3e516d5826826522d9a90ed6ef74d86Dan Gohman } else if (isa<AllocaInst>(V)) { 1762ff7fd146159d97abe94391a33b4385abb06bbb0Dan Gohman Reg = TargetMaterializeAlloca(cast<AllocaInst>(V)); 177205d92589bc8c59d4bba9ddf89e0eb3c4d548cdaDan Gohman } else if (isa<ConstantPointerNull>(V)) { 1781e9e8c3bd5ac018296bddb21a2acb8c643303b39Dan Gohman // Translate this as an integer zero so that it can be 1791e9e8c3bd5ac018296bddb21a2acb8c643303b39Dan Gohman // local-CSE'd with actual integer zeros. 1801d0be15f89cb5056e20e2d24faa8d6afb1573bcaOwen Anderson Reg = 1811d0be15f89cb5056e20e2d24faa8d6afb1573bcaOwen Anderson getRegForValue(Constant::getNullValue(TD.getIntPtrType(V->getContext()))); 18246510a73e977273ec67747eb34cbdb43f815e451Dan Gohman } else if (const ConstantFP *CF = dyn_cast<ConstantFP>(V)) { 183bd1253809bc1b2455793a64d2801db3d6317b08eEli Friedman if (CF->isNullValue()) { 1842790ba8e5a7bb6e00fdac9997d840598fb60271cEli Friedman Reg = TargetMaterializeFloatZero(CF); 1852790ba8e5a7bb6e00fdac9997d840598fb60271cEli Friedman } else { 1862790ba8e5a7bb6e00fdac9997d840598fb60271cEli Friedman // Try to emit the constant directly. 1872790ba8e5a7bb6e00fdac9997d840598fb60271cEli Friedman Reg = FastEmit_f(VT, VT, ISD::ConstantFP, CF); 1882790ba8e5a7bb6e00fdac9997d840598fb60271cEli Friedman } 189ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman 190ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman if (!Reg) { 1914183e31978146ea529a87a2fc47b96aeb6cbe000Dan Gohman // Try to emit the constant by using an integer constant with a cast. 192ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman const APFloat &Flt = CF->getValueAPF(); 193e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT IntVT = TLI.getPointerTy(); 194ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman 195ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman uint64_t x[2]; 196ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman uint32_t IntBitWidth = IntVT.getSizeInBits(); 19723a98551ab65eeb8fe5019df8b7db4891582a4bdDale Johannesen bool isExact; 19823a98551ab65eeb8fe5019df8b7db4891582a4bdDale Johannesen (void) Flt.convertToInteger(x, IntBitWidth, /*isSigned=*/true, 19923a98551ab65eeb8fe5019df8b7db4891582a4bdDale Johannesen APFloat::rmTowardZero, &isExact); 20023a98551ab65eeb8fe5019df8b7db4891582a4bdDale Johannesen if (isExact) { 2013ba292dbc2acee2d1052fb7ffe332e2164147b47Jeffrey Yasskin APInt IntVal(IntBitWidth, x); 202ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman 203e922c0201916e0b980ab3cfe91e1413e68d55647Owen Anderson unsigned IntegerReg = 204eed707b1e6097aac2bb6b3d47271f6300ace7f2eOwen Anderson getRegForValue(ConstantInt::get(V->getContext(), IntVal)); 2052ff7fd146159d97abe94391a33b4385abb06bbb0Dan Gohman if (IntegerReg != 0) 206a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman Reg = FastEmit_r(IntVT.getSimpleVT(), VT, ISD::SINT_TO_FP, 207a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IntegerReg, /*Kill=*/false); 2082ff7fd146159d97abe94391a33b4385abb06bbb0Dan Gohman } 209ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman } 21046510a73e977273ec67747eb34cbdb43f815e451Dan Gohman } else if (const Operator *Op = dyn_cast<Operator>(V)) { 21120d4be151b54feb18aa1e5cc04033a4aa64137aeDan Gohman if (!SelectOperator(Op, Op->getOpcode())) 21220d4be151b54feb18aa1e5cc04033a4aa64137aeDan Gohman if (!isa<Instruction>(Op) || 21320d4be151b54feb18aa1e5cc04033a4aa64137aeDan Gohman !TargetSelectInstruction(cast<Instruction>(Op))) 21420d4be151b54feb18aa1e5cc04033a4aa64137aeDan Gohman return 0; 21537db6cdaea47d0637bdbe624f7b10ff8f82928adDan Gohman Reg = lookUpRegForValue(Op); 216205d92589bc8c59d4bba9ddf89e0eb3c4d548cdaDan Gohman } else if (isa<UndefValue>(V)) { 217104e4ce1629ea84736691bd1ee7867bdf90e8a2eDan Gohman Reg = createResultReg(TLI.getRegClassFor(VT)); 21884023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, 21984023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman TII.get(TargetOpcode::IMPLICIT_DEF), Reg); 220ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman } 221bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 222dceffe66b9e73ce372ea11c0fc6975504eb8c31dDan Gohman // If target-independent code couldn't handle the value, give target-specific 223dceffe66b9e73ce372ea11c0fc6975504eb8c31dDan Gohman // code a try. 2246e6074508c2f781c3e52dfe0e301cb1c7f395a91Owen Anderson if (!Reg && isa<Constant>(V)) 2252ff7fd146159d97abe94391a33b4385abb06bbb0Dan Gohman Reg = TargetMaterializeConstant(cast<Constant>(V)); 226bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 2272ff7fd146159d97abe94391a33b4385abb06bbb0Dan Gohman // Don't cache constant materializations in the general ValueMap. 2282ff7fd146159d97abe94391a33b4385abb06bbb0Dan Gohman // To do so would require tracking what uses they dominate. 22984023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman if (Reg != 0) { 230dceffe66b9e73ce372ea11c0fc6975504eb8c31dDan Gohman LocalValueMap[V] = Reg; 23184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman LastLocalValue = MRI.getVRegDef(Reg); 23284023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman } 233104e4ce1629ea84736691bd1ee7867bdf90e8a2eDan Gohman return Reg; 234ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman} 235ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman 23646510a73e977273ec67747eb34cbdb43f815e451Dan Gohmanunsigned FastISel::lookUpRegForValue(const Value *V) { 23759fbc80f6b3b5c71dfb84149f589625f7ed510e3Evan Cheng // Look up the value to see if we already have a register for it. We 23859fbc80f6b3b5c71dfb84149f589625f7ed510e3Evan Cheng // cache values defined by Instructions across blocks, and other values 23959fbc80f6b3b5c71dfb84149f589625f7ed510e3Evan Cheng // only locally. This is because Instructions already have the SSA 2401fdc614bee2a324fcc210d1e46d9b6fca3ca324bDan Gohman // def-dominates-use requirement enforced. 241a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman DenseMap<const Value *, unsigned>::iterator I = FuncInfo.ValueMap.find(V); 242a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman if (I != FuncInfo.ValueMap.end()) 2433193a689db3de8640d412ccd9482301647359a4eDan Gohman return I->second; 24459fbc80f6b3b5c71dfb84149f589625f7ed510e3Evan Cheng return LocalValueMap[V]; 24559fbc80f6b3b5c71dfb84149f589625f7ed510e3Evan Cheng} 24659fbc80f6b3b5c71dfb84149f589625f7ed510e3Evan Cheng 247cc54e76cc67bbc9badc024ab29053602769bd255Owen Anderson/// UpdateValueMap - Update the value map to include the new mapping for this 248cc54e76cc67bbc9badc024ab29053602769bd255Owen Anderson/// instruction, or insert an extra copy to get the result in a previous 249cc54e76cc67bbc9badc024ab29053602769bd255Owen Anderson/// determined register. 250cc54e76cc67bbc9badc024ab29053602769bd255Owen Anderson/// NOTE: This is only necessary because we might select a block that uses 251cc54e76cc67bbc9badc024ab29053602769bd255Owen Anderson/// a value before we select the block that defines the value. It might be 252cc54e76cc67bbc9badc024ab29053602769bd255Owen Anderson/// possible to fix this by selecting blocks in reverse postorder. 253482feb33b2bba677d47bab859d9e1e95d67016bdEli Friedmanvoid FastISel::UpdateValueMap(const Value *I, unsigned Reg, unsigned NumRegs) { 25440b189e4e257924d90aaf63bf2e12bc7bbca961aDan Gohman if (!isa<Instruction>(I)) { 25540b189e4e257924d90aaf63bf2e12bc7bbca961aDan Gohman LocalValueMap[I] = Reg; 256482feb33b2bba677d47bab859d9e1e95d67016bdEli Friedman return; 257c5040ab6065d5c569a1af0848b6e672b22b174b7Chris Lattner } 258bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 259a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman unsigned &AssignedReg = FuncInfo.ValueMap[I]; 260c5040ab6065d5c569a1af0848b6e672b22b174b7Chris Lattner if (AssignedReg == 0) 26184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman // Use the new register. 262c5040ab6065d5c569a1af0848b6e672b22b174b7Chris Lattner AssignedReg = Reg; 26336e3946ac2f30a0bda66538ef2b974b1c8fbdc97Chris Lattner else if (Reg != AssignedReg) { 26484023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman // Arrange for uses of AssignedReg to be replaced by uses of Reg. 265482feb33b2bba677d47bab859d9e1e95d67016bdEli Friedman for (unsigned i = 0; i < NumRegs; i++) 266482feb33b2bba677d47bab859d9e1e95d67016bdEli Friedman FuncInfo.RegFixups[AssignedReg+i] = Reg+i; 26784023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 26884023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman AssignedReg = Reg; 26940b189e4e257924d90aaf63bf2e12bc7bbca961aDan Gohman } 270cc54e76cc67bbc9badc024ab29053602769bd255Owen Anderson} 271cc54e76cc67bbc9badc024ab29053602769bd255Owen Anderson 272a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohmanstd::pair<unsigned, bool> FastISel::getRegForGEPIndex(const Value *Idx) { 273c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman unsigned IdxN = getRegForValue(Idx); 274c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman if (IdxN == 0) 275c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman // Unhandled operand. Halt "fast" selection and bail. 276a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman return std::pair<unsigned, bool>(0, false); 277a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman 278a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman bool IdxNIsKill = hasTrivialKill(Idx); 279c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman 280c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman // If the index is smaller or larger than intptr_t, truncate or extend it. 281766b5efd99c01e26f00f22d81b57d1385b3d2ab0Owen Anderson MVT PtrVT = TLI.getPointerTy(); 282e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT IdxVT = EVT::getEVT(Idx->getType(), /*HandleUnknown=*/false); 283a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman if (IdxVT.bitsLT(PtrVT)) { 284a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IdxN = FastEmit_r(IdxVT.getSimpleVT(), PtrVT, ISD::SIGN_EXTEND, 285a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IdxN, IdxNIsKill); 286a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IdxNIsKill = true; 287a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman } 288a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman else if (IdxVT.bitsGT(PtrVT)) { 289a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IdxN = FastEmit_r(IdxVT.getSimpleVT(), PtrVT, ISD::TRUNCATE, 290a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IdxN, IdxNIsKill); 291a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IdxNIsKill = true; 292a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman } 293a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman return std::pair<unsigned, bool>(IdxN, IdxNIsKill); 294c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman} 295c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman 29684023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohmanvoid FastISel::recomputeInsertPt() { 29784023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman if (getLastLocalValue()) { 29884023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman FuncInfo.InsertPt = getLastLocalValue(); 299c6e59b71f50c7c77bc448a936dba8e84d90911e8Dan Gohman FuncInfo.MBB = FuncInfo.InsertPt->getParent(); 30084023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman ++FuncInfo.InsertPt; 30184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman } else 30284023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman FuncInfo.InsertPt = FuncInfo.MBB->getFirstNonPHI(); 30384023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 30484023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman // Now skip past any EH_LABELs, which must remain at the beginning. 30584023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman while (FuncInfo.InsertPt != FuncInfo.MBB->end() && 30684023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman FuncInfo.InsertPt->getOpcode() == TargetOpcode::EH_LABEL) 30784023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman ++FuncInfo.InsertPt; 30884023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman} 30984023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 310a10b8494a50108482302f6f077d72fbc76d776edDan GohmanFastISel::SavePoint FastISel::enterLocalValueArea() { 31184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman MachineBasicBlock::iterator OldInsertPt = FuncInfo.InsertPt; 312163f78ea4016d594d921154d8df1c9d746fb0ea8Dan Gohman DebugLoc OldDL = DL; 31384023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman recomputeInsertPt(); 314a10b8494a50108482302f6f077d72fbc76d776edDan Gohman DL = DebugLoc(); 315163f78ea4016d594d921154d8df1c9d746fb0ea8Dan Gohman SavePoint SP = { OldInsertPt, OldDL }; 316a10b8494a50108482302f6f077d72fbc76d776edDan Gohman return SP; 31784023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman} 31884023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 319a10b8494a50108482302f6f077d72fbc76d776edDan Gohmanvoid FastISel::leaveLocalValueArea(SavePoint OldInsertPt) { 32084023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman if (FuncInfo.InsertPt != FuncInfo.MBB->begin()) 32184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman LastLocalValue = llvm::prior(FuncInfo.InsertPt); 32284023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 32384023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman // Restore the previous insert position. 324a10b8494a50108482302f6f077d72fbc76d776edDan Gohman FuncInfo.InsertPt = OldInsertPt.InsertPt; 325a10b8494a50108482302f6f077d72fbc76d776edDan Gohman DL = OldInsertPt.DL; 32684023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman} 32784023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 328bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman/// SelectBinaryOp - Select and emit code for a binary operator instruction, 329bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman/// which has an opcode which directly corresponds to the given ISD opcode. 330bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman/// 33146510a73e977273ec67747eb34cbdb43f815e451Dan Gohmanbool FastISel::SelectBinaryOp(const User *I, unsigned ISDOpcode) { 332e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT VT = EVT::getEVT(I->getType(), /*HandleUnknown=*/true); 333825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson if (VT == MVT::Other || !VT.isSimple()) 334d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman // Unhandled type. Halt "fast" selection and bail. 335d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman return false; 336638c6830c6d0d6871065d2b00178ee4aa7d4d044Dan Gohman 337b71fea248fd7cf9ab2c5737997a3dc5682948dc4Dan Gohman // We only handle legal types. For example, on x86-32 the instruction 338b71fea248fd7cf9ab2c5737997a3dc5682948dc4Dan Gohman // selector contains all of the 64-bit instructions from x86-64, 339b71fea248fd7cf9ab2c5737997a3dc5682948dc4Dan Gohman // under the assumption that i64 won't be used if the target doesn't 340b71fea248fd7cf9ab2c5737997a3dc5682948dc4Dan Gohman // support it. 341638c6830c6d0d6871065d2b00178ee4aa7d4d044Dan Gohman if (!TLI.isTypeLegal(VT)) { 342825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson // MVT::i1 is special. Allow AND, OR, or XOR because they 343638c6830c6d0d6871065d2b00178ee4aa7d4d044Dan Gohman // don't require additional zeroing, which makes them easy. 344825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson if (VT == MVT::i1 && 3455dd9c2e9aea7294c184609aff7f2fe82eaea4eb0Dan Gohman (ISDOpcode == ISD::AND || ISDOpcode == ISD::OR || 3465dd9c2e9aea7294c184609aff7f2fe82eaea4eb0Dan Gohman ISDOpcode == ISD::XOR)) 34723b9b19b1a5a00faa9fce0788155c7dbfd00bfb1Owen Anderson VT = TLI.getTypeToTransformTo(I->getContext(), VT); 348638c6830c6d0d6871065d2b00178ee4aa7d4d044Dan Gohman else 349638c6830c6d0d6871065d2b00178ee4aa7d4d044Dan Gohman return false; 350638c6830c6d0d6871065d2b00178ee4aa7d4d044Dan Gohman } 351d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman 352fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner // Check if the first operand is a constant, and handle it as "ri". At -O0, 353fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner // we don't have anything that canonicalizes operand order. 354fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner if (ConstantInt *CI = dyn_cast<ConstantInt>(I->getOperand(0))) 355fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner if (isa<Instruction>(I) && cast<Instruction>(I)->isCommutative()) { 356fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner unsigned Op1 = getRegForValue(I->getOperand(1)); 357fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner if (Op1 == 0) return false; 358fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner 359fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner bool Op1IsKill = hasTrivialKill(I->getOperand(1)); 360d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 361602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner unsigned ResultReg = FastEmit_ri_(VT.getSimpleVT(), ISDOpcode, Op1, 362602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner Op1IsKill, CI->getZExtValue(), 363602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner VT.getSimpleVT()); 364602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner if (ResultReg == 0) return false; 365d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 366602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner // We successfully emitted code for the given LLVM Instruction. 367602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner UpdateValueMap(I, ResultReg); 368602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner return true; 369fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner } 370d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 371d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 3723df24e667f04a7003342b534310919abc9c87418Dan Gohman unsigned Op0 = getRegForValue(I->getOperand(0)); 373602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner if (Op0 == 0) // Unhandled operand. Halt "fast" selection and bail. 374a7f2dff98e68ed8b2ac32f953768c04f26b52beaDan Gohman return false; 375a7f2dff98e68ed8b2ac32f953768c04f26b52beaDan Gohman 376a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman bool Op0IsKill = hasTrivialKill(I->getOperand(0)); 377a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman 378d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman // Check if the second operand is a constant and handle it appropriately. 379d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman if (ConstantInt *CI = dyn_cast<ConstantInt>(I->getOperand(1))) { 380602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner uint64_t Imm = CI->getZExtValue(); 381d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 382f051c1a29dd040b4b5ca0c5696d47a9058f87481Chris Lattner // Transform "sdiv exact X, 8" -> "sra X, 3". 383f051c1a29dd040b4b5ca0c5696d47a9058f87481Chris Lattner if (ISDOpcode == ISD::SDIV && isa<BinaryOperator>(I) && 384f051c1a29dd040b4b5ca0c5696d47a9058f87481Chris Lattner cast<BinaryOperator>(I)->isExact() && 385f051c1a29dd040b4b5ca0c5696d47a9058f87481Chris Lattner isPowerOf2_64(Imm)) { 386f051c1a29dd040b4b5ca0c5696d47a9058f87481Chris Lattner Imm = Log2_64(Imm); 387f051c1a29dd040b4b5ca0c5696d47a9058f87481Chris Lattner ISDOpcode = ISD::SRA; 388f051c1a29dd040b4b5ca0c5696d47a9058f87481Chris Lattner } 389d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 390602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner unsigned ResultReg = FastEmit_ri_(VT.getSimpleVT(), ISDOpcode, Op0, 391602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner Op0IsKill, Imm, VT.getSimpleVT()); 392602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner if (ResultReg == 0) return false; 393d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 394602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner // We successfully emitted code for the given LLVM Instruction. 395602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner UpdateValueMap(I, ResultReg); 396602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner return true; 397d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman } 398d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman 39910df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman // Check if the second operand is a constant float. 40010df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman if (ConstantFP *CF = dyn_cast<ConstantFP>(I->getOperand(1))) { 401ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman unsigned ResultReg = FastEmit_rf(VT.getSimpleVT(), VT.getSimpleVT(), 402a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman ISDOpcode, Op0, Op0IsKill, CF); 403ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman if (ResultReg != 0) { 404ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman // We successfully emitted code for the given LLVM Instruction. 4053df24e667f04a7003342b534310919abc9c87418Dan Gohman UpdateValueMap(I, ResultReg); 406ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman return true; 407ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman } 40810df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman } 40910df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman 4103df24e667f04a7003342b534310919abc9c87418Dan Gohman unsigned Op1 = getRegForValue(I->getOperand(1)); 411d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman if (Op1 == 0) 412d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman // Unhandled operand. Halt "fast" selection and bail. 413bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman return false; 414bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman 415a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman bool Op1IsKill = hasTrivialKill(I->getOperand(1)); 416a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman 417ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman // Now we have both operands in registers. Emit the instruction. 4180f84e4e31009eecf2dfcbe6113b65d0919f30254Owen Anderson unsigned ResultReg = FastEmit_rr(VT.getSimpleVT(), VT.getSimpleVT(), 419a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman ISDOpcode, 420a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman Op0, Op0IsKill, 421a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman Op1, Op1IsKill); 422bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman if (ResultReg == 0) 423bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman // Target-specific code wasn't able to find a machine opcode for 424bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman // the given ISD opcode and type. Halt "fast" selection and bail. 425bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman return false; 426bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman 4278014e865800cc911697a4c0c42f077df9fcc9805Dan Gohman // We successfully emitted code for the given LLVM Instruction. 4283df24e667f04a7003342b534310919abc9c87418Dan Gohman UpdateValueMap(I, ResultReg); 429bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman return true; 430bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman} 431bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman 43246510a73e977273ec67747eb34cbdb43f815e451Dan Gohmanbool FastISel::SelectGetElementPtr(const User *I) { 4333df24e667f04a7003342b534310919abc9c87418Dan Gohman unsigned N = getRegForValue(I->getOperand(0)); 43483785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng if (N == 0) 43583785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // Unhandled operand. Halt "fast" selection and bail. 43683785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng return false; 43783785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng 438a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman bool NIsKill = hasTrivialKill(I->getOperand(0)); 439a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman 440db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner Type *Ty = I->getOperand(0)->getType(); 441825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson MVT VT = TLI.getPointerTy(); 44246510a73e977273ec67747eb34cbdb43f815e451Dan Gohman for (GetElementPtrInst::const_op_iterator OI = I->op_begin()+1, 44346510a73e977273ec67747eb34cbdb43f815e451Dan Gohman E = I->op_end(); OI != E; ++OI) { 44446510a73e977273ec67747eb34cbdb43f815e451Dan Gohman const Value *Idx = *OI; 445db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner if (StructType *StTy = dyn_cast<StructType>(Ty)) { 44683785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng unsigned Field = cast<ConstantInt>(Idx)->getZExtValue(); 44783785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng if (Field) { 44883785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // N = N + Offset 44983785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng uint64_t Offs = TD.getStructLayout(StTy)->getElementOffset(Field); 45083785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // FIXME: This can be optimized by combining the add with a 45183785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // subsequent one. 452a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman N = FastEmit_ri_(VT, ISD::ADD, N, NIsKill, Offs, VT); 45383785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng if (N == 0) 45483785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // Unhandled operand. Halt "fast" selection and bail. 45583785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng return false; 456a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman NIsKill = true; 45783785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng } 45883785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng Ty = StTy->getElementType(Field); 45983785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng } else { 46083785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng Ty = cast<SequentialType>(Ty)->getElementType(); 46183785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng 46283785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // If this is a constant subscript, handle it quickly. 46346510a73e977273ec67747eb34cbdb43f815e451Dan Gohman if (const ConstantInt *CI = dyn_cast<ConstantInt>(Idx)) { 464e368b460a206fafa0d31d5d059b1779b94f7df8cDan Gohman if (CI->isZero()) continue; 465bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck uint64_t Offs = 466777d2306b36816a53bc1ae1244c0dc7d998ae691Duncan Sands TD.getTypeAllocSize(Ty)*cast<ConstantInt>(CI)->getSExtValue(); 467a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman N = FastEmit_ri_(VT, ISD::ADD, N, NIsKill, Offs, VT); 46883785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng if (N == 0) 46983785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // Unhandled operand. Halt "fast" selection and bail. 47083785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng return false; 471a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman NIsKill = true; 47283785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng continue; 47383785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng } 474bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 47583785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // N = N + Idx * ElementSize; 476777d2306b36816a53bc1ae1244c0dc7d998ae691Duncan Sands uint64_t ElementSize = TD.getTypeAllocSize(Ty); 477a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman std::pair<unsigned, bool> Pair = getRegForGEPIndex(Idx); 478a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned IdxN = Pair.first; 479a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman bool IdxNIsKill = Pair.second; 48083785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng if (IdxN == 0) 48183785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // Unhandled operand. Halt "fast" selection and bail. 48283785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng return false; 48383785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng 48480bc6e2243b7ae99da42bf2e61df4ebccf8d8821Dan Gohman if (ElementSize != 1) { 485a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IdxN = FastEmit_ri_(VT, ISD::MUL, IdxN, IdxNIsKill, ElementSize, VT); 48680bc6e2243b7ae99da42bf2e61df4ebccf8d8821Dan Gohman if (IdxN == 0) 48780bc6e2243b7ae99da42bf2e61df4ebccf8d8821Dan Gohman // Unhandled operand. Halt "fast" selection and bail. 48880bc6e2243b7ae99da42bf2e61df4ebccf8d8821Dan Gohman return false; 489a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IdxNIsKill = true; 49080bc6e2243b7ae99da42bf2e61df4ebccf8d8821Dan Gohman } 491a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman N = FastEmit_rr(VT, VT, ISD::ADD, N, NIsKill, IdxN, IdxNIsKill); 49283785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng if (N == 0) 49383785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // Unhandled operand. Halt "fast" selection and bail. 49483785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng return false; 49583785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng } 49683785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng } 49783785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng 49883785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // We successfully emitted code for the given LLVM Instruction. 4993df24e667f04a7003342b534310919abc9c87418Dan Gohman UpdateValueMap(I, N); 50083785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng return true; 501bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman} 502bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman 50346510a73e977273ec67747eb34cbdb43f815e451Dan Gohmanbool FastISel::SelectCall(const User *I) { 504a61e73bda5125c28e48b52e573d115370838596bDan Gohman const CallInst *Call = cast<CallInst>(I); 505a61e73bda5125c28e48b52e573d115370838596bDan Gohman 506a61e73bda5125c28e48b52e573d115370838596bDan Gohman // Handle simple inline asms. 5079e15d658c99c3f0717cb83cc2bd2aa29abdbcdbbDan Gohman if (const InlineAsm *IA = dyn_cast<InlineAsm>(Call->getCalledValue())) { 508a61e73bda5125c28e48b52e573d115370838596bDan Gohman // Don't attempt to handle constraints. 509a61e73bda5125c28e48b52e573d115370838596bDan Gohman if (!IA->getConstraintString().empty()) 510a61e73bda5125c28e48b52e573d115370838596bDan Gohman return false; 511a61e73bda5125c28e48b52e573d115370838596bDan Gohman 512a61e73bda5125c28e48b52e573d115370838596bDan Gohman unsigned ExtraInfo = 0; 513a61e73bda5125c28e48b52e573d115370838596bDan Gohman if (IA->hasSideEffects()) 514a61e73bda5125c28e48b52e573d115370838596bDan Gohman ExtraInfo |= InlineAsm::Extra_HasSideEffects; 515a61e73bda5125c28e48b52e573d115370838596bDan Gohman if (IA->isAlignStack()) 516a61e73bda5125c28e48b52e573d115370838596bDan Gohman ExtraInfo |= InlineAsm::Extra_IsAlignStack; 517a61e73bda5125c28e48b52e573d115370838596bDan Gohman 518a61e73bda5125c28e48b52e573d115370838596bDan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, 519a61e73bda5125c28e48b52e573d115370838596bDan Gohman TII.get(TargetOpcode::INLINEASM)) 520a61e73bda5125c28e48b52e573d115370838596bDan Gohman .addExternalSymbol(IA->getAsmString().c_str()) 521a61e73bda5125c28e48b52e573d115370838596bDan Gohman .addImm(ExtraInfo); 522a61e73bda5125c28e48b52e573d115370838596bDan Gohman return true; 523a61e73bda5125c28e48b52e573d115370838596bDan Gohman } 524a61e73bda5125c28e48b52e573d115370838596bDan Gohman 525a61e73bda5125c28e48b52e573d115370838596bDan Gohman const Function *F = Call->getCalledFunction(); 52633134c4a75558288d663267c8991f6bd37a530afDan Gohman if (!F) return false; 52733134c4a75558288d663267c8991f6bd37a530afDan Gohman 5284183e31978146ea529a87a2fc47b96aeb6cbe000Dan Gohman // Handle selected intrinsic function calls. 529832e4943598d821687cec79f512803c1ca03cff7Chris Lattner switch (F->getIntrinsicID()) { 53033134c4a75558288d663267c8991f6bd37a530afDan Gohman default: break; 53192c1e126473dfa93eeb4c9a124af4fedb40f0d5bBill Wendling case Intrinsic::dbg_declare: { 532a61e73bda5125c28e48b52e573d115370838596bDan Gohman const DbgDeclareInst *DI = cast<DbgDeclareInst>(Call); 53302f0dbd97a9bc01528aa12c2f260d928683ab411Devang Patel if (!DIVariable(DI->getVariable()).Verify() || 534a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman !FuncInfo.MF->getMMI().hasDebugInfo()) 5357e1e31f467d87c834d8baf673929865907901313Devang Patel return true; 53692c1e126473dfa93eeb4c9a124af4fedb40f0d5bBill Wendling 53746510a73e977273ec67747eb34cbdb43f815e451Dan Gohman const Value *Address = DI->getAddress(); 5386fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel if (!Address || isa<UndefValue>(Address) || isa<AllocaInst>(Address)) 539dc9185657593b5c1db86cb95a04a68fc09194993Dale Johannesen return true; 5406fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel 5416fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel unsigned Reg = 0; 5426fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel unsigned Offset = 0; 5436fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel if (const Argument *Arg = dyn_cast<Argument>(Address)) { 5449aee335c23bec4f6d1b2cab3bca76231d7b0d556Devang Patel // Some arguments' frame index is recorded during argument lowering. 5459aee335c23bec4f6d1b2cab3bca76231d7b0d556Devang Patel Offset = FuncInfo.getArgumentFrameIndex(Arg); 5469aee335c23bec4f6d1b2cab3bca76231d7b0d556Devang Patel if (Offset) 5479aee335c23bec4f6d1b2cab3bca76231d7b0d556Devang Patel Reg = TRI.getFrameRegister(*FuncInfo.MF); 5484bafda9618f9dfa9edc8da08bb3001ef2d1a9b68Devang Patel } 5496fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel if (!Reg) 5506fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel Reg = getRegForValue(Address); 551bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 5526fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel if (Reg) 553bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, 5546fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel TII.get(TargetOpcode::DBG_VALUE)) 5556fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel .addReg(Reg, RegState::Debug).addImm(Offset) 5566fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel .addMetadata(DI->getVariable()); 55733134c4a75558288d663267c8991f6bd37a530afDan Gohman return true; 55892c1e126473dfa93eeb4c9a124af4fedb40f0d5bBill Wendling } 55945df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen case Intrinsic::dbg_value: { 560343b42e428079363ab09828734b2debfd7dbdc9eDale Johannesen // This form of DBG_VALUE is target-independent. 561a61e73bda5125c28e48b52e573d115370838596bDan Gohman const DbgValueInst *DI = cast<DbgValueInst>(Call); 562e837dead3c8dc3445ef6a0e2322179c57e264a13Evan Cheng const MCInstrDesc &II = TII.get(TargetOpcode::DBG_VALUE); 56346510a73e977273ec67747eb34cbdb43f815e451Dan Gohman const Value *V = DI->getValue(); 56445df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen if (!V) { 56545df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen // Currently the optimizer can produce this; insert an undef to 56645df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen // help debugging. Probably the optimizer should not do this. 56784023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 56884023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman .addReg(0U).addImm(DI->getOffset()) 56984023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman .addMetadata(DI->getVariable()); 57046510a73e977273ec67747eb34cbdb43f815e451Dan Gohman } else if (const ConstantInt *CI = dyn_cast<ConstantInt>(V)) { 5718594d429e02c688d428036f8563f09572da3fbffDevang Patel if (CI->getBitWidth() > 64) 5728594d429e02c688d428036f8563f09572da3fbffDevang Patel BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 5738594d429e02c688d428036f8563f09572da3fbffDevang Patel .addCImm(CI).addImm(DI->getOffset()) 5748594d429e02c688d428036f8563f09572da3fbffDevang Patel .addMetadata(DI->getVariable()); 5758594d429e02c688d428036f8563f09572da3fbffDevang Patel else 5768594d429e02c688d428036f8563f09572da3fbffDevang Patel BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 5778594d429e02c688d428036f8563f09572da3fbffDevang Patel .addImm(CI->getZExtValue()).addImm(DI->getOffset()) 5788594d429e02c688d428036f8563f09572da3fbffDevang Patel .addMetadata(DI->getVariable()); 57946510a73e977273ec67747eb34cbdb43f815e451Dan Gohman } else if (const ConstantFP *CF = dyn_cast<ConstantFP>(V)) { 58084023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 58184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman .addFPImm(CF).addImm(DI->getOffset()) 58284023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman .addMetadata(DI->getVariable()); 58345df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen } else if (unsigned Reg = lookUpRegForValue(V)) { 58484023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 58584023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman .addReg(Reg, RegState::Debug).addImm(DI->getOffset()) 58684023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman .addMetadata(DI->getVariable()); 58745df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen } else { 58845df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen // We can't yet handle anything else here because it would require 58945df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen // generating code, thus altering codegen because of debug info. 590afeaae7a940ce16e7874af31f3e5e91d8ca89e19Devang Patel DEBUG(dbgs() << "Dropping debug info for " << DI); 591bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck } 59245df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen return true; 59345df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen } 594dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman case Intrinsic::eh_exception: { 595a61e73bda5125c28e48b52e573d115370838596bDan Gohman EVT VT = TLI.getValueType(Call->getType()); 596832e4943598d821687cec79f512803c1ca03cff7Chris Lattner if (TLI.getOperationAction(ISD::EXCEPTIONADDR, VT)!=TargetLowering::Expand) 597832e4943598d821687cec79f512803c1ca03cff7Chris Lattner break; 598d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 599832e4943598d821687cec79f512803c1ca03cff7Chris Lattner assert(FuncInfo.MBB->isLandingPad() && 600832e4943598d821687cec79f512803c1ca03cff7Chris Lattner "Call to eh.exception not in landing pad!"); 601832e4943598d821687cec79f512803c1ca03cff7Chris Lattner unsigned Reg = TLI.getExceptionAddressRegister(); 602832e4943598d821687cec79f512803c1ca03cff7Chris Lattner const TargetRegisterClass *RC = TLI.getRegClassFor(VT); 603832e4943598d821687cec79f512803c1ca03cff7Chris Lattner unsigned ResultReg = createResultReg(RC); 604832e4943598d821687cec79f512803c1ca03cff7Chris Lattner BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 605832e4943598d821687cec79f512803c1ca03cff7Chris Lattner ResultReg).addReg(Reg); 606a61e73bda5125c28e48b52e573d115370838596bDan Gohman UpdateValueMap(Call, ResultReg); 607832e4943598d821687cec79f512803c1ca03cff7Chris Lattner return true; 608dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman } 609b01bbdcc1af27bd90b552bb1b62b48916e0d4be3Duncan Sands case Intrinsic::eh_selector: { 610a61e73bda5125c28e48b52e573d115370838596bDan Gohman EVT VT = TLI.getValueType(Call->getType()); 611832e4943598d821687cec79f512803c1ca03cff7Chris Lattner if (TLI.getOperationAction(ISD::EHSELECTION, VT) != TargetLowering::Expand) 612832e4943598d821687cec79f512803c1ca03cff7Chris Lattner break; 613832e4943598d821687cec79f512803c1ca03cff7Chris Lattner if (FuncInfo.MBB->isLandingPad()) 614a61e73bda5125c28e48b52e573d115370838596bDan Gohman AddCatchInfo(*Call, &FuncInfo.MF->getMMI(), FuncInfo.MBB); 615832e4943598d821687cec79f512803c1ca03cff7Chris Lattner else { 616dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman#ifndef NDEBUG 617a61e73bda5125c28e48b52e573d115370838596bDan Gohman FuncInfo.CatchInfoLost.insert(Call); 618dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman#endif 619832e4943598d821687cec79f512803c1ca03cff7Chris Lattner // FIXME: Mark exception selector register as live in. Hack for PR1508. 620ed3a8067a60ecf2c215e77327a57904c3ebc3355Chris Lattner unsigned Reg = TLI.getExceptionSelectorRegister(); 621832e4943598d821687cec79f512803c1ca03cff7Chris Lattner if (Reg) FuncInfo.MBB->addLiveIn(Reg); 622832e4943598d821687cec79f512803c1ca03cff7Chris Lattner } 623ed3a8067a60ecf2c215e77327a57904c3ebc3355Chris Lattner 624832e4943598d821687cec79f512803c1ca03cff7Chris Lattner unsigned Reg = TLI.getExceptionSelectorRegister(); 625832e4943598d821687cec79f512803c1ca03cff7Chris Lattner EVT SrcVT = TLI.getPointerTy(); 626832e4943598d821687cec79f512803c1ca03cff7Chris Lattner const TargetRegisterClass *RC = TLI.getRegClassFor(SrcVT); 627832e4943598d821687cec79f512803c1ca03cff7Chris Lattner unsigned ResultReg = createResultReg(RC); 628832e4943598d821687cec79f512803c1ca03cff7Chris Lattner BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 629832e4943598d821687cec79f512803c1ca03cff7Chris Lattner ResultReg).addReg(Reg); 630832e4943598d821687cec79f512803c1ca03cff7Chris Lattner 631a61e73bda5125c28e48b52e573d115370838596bDan Gohman bool ResultRegIsKill = hasTrivialKill(Call); 632832e4943598d821687cec79f512803c1ca03cff7Chris Lattner 633832e4943598d821687cec79f512803c1ca03cff7Chris Lattner // Cast the register to the type of the selector. 634832e4943598d821687cec79f512803c1ca03cff7Chris Lattner if (SrcVT.bitsGT(MVT::i32)) 635832e4943598d821687cec79f512803c1ca03cff7Chris Lattner ResultReg = FastEmit_r(SrcVT.getSimpleVT(), MVT::i32, ISD::TRUNCATE, 636832e4943598d821687cec79f512803c1ca03cff7Chris Lattner ResultReg, ResultRegIsKill); 637832e4943598d821687cec79f512803c1ca03cff7Chris Lattner else if (SrcVT.bitsLT(MVT::i32)) 638832e4943598d821687cec79f512803c1ca03cff7Chris Lattner ResultReg = FastEmit_r(SrcVT.getSimpleVT(), MVT::i32, 639832e4943598d821687cec79f512803c1ca03cff7Chris Lattner ISD::SIGN_EXTEND, ResultReg, ResultRegIsKill); 640832e4943598d821687cec79f512803c1ca03cff7Chris Lattner if (ResultReg == 0) 641832e4943598d821687cec79f512803c1ca03cff7Chris Lattner // Unhandled operand. Halt "fast" selection and bail. 642832e4943598d821687cec79f512803c1ca03cff7Chris Lattner return false; 643ed3a8067a60ecf2c215e77327a57904c3ebc3355Chris Lattner 644a61e73bda5125c28e48b52e573d115370838596bDan Gohman UpdateValueMap(Call, ResultReg); 645832e4943598d821687cec79f512803c1ca03cff7Chris Lattner 646832e4943598d821687cec79f512803c1ca03cff7Chris Lattner return true; 647dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman } 648d0118a2371f35faa6af97e67be69e1debc615c42Eli Friedman case Intrinsic::objectsize: { 649d0118a2371f35faa6af97e67be69e1debc615c42Eli Friedman ConstantInt *CI = cast<ConstantInt>(Call->getArgOperand(1)); 650d0118a2371f35faa6af97e67be69e1debc615c42Eli Friedman unsigned long long Res = CI->isZero() ? -1ULL : 0; 651d0118a2371f35faa6af97e67be69e1debc615c42Eli Friedman Constant *ResCI = ConstantInt::get(Call->getType(), Res); 652d0118a2371f35faa6af97e67be69e1debc615c42Eli Friedman unsigned ResultReg = getRegForValue(ResCI); 653d0118a2371f35faa6af97e67be69e1debc615c42Eli Friedman if (ResultReg == 0) 654d0118a2371f35faa6af97e67be69e1debc615c42Eli Friedman return false; 655d0118a2371f35faa6af97e67be69e1debc615c42Eli Friedman UpdateValueMap(Call, ResultReg); 656d0118a2371f35faa6af97e67be69e1debc615c42Eli Friedman return true; 657d0118a2371f35faa6af97e67be69e1debc615c42Eli Friedman } 65833134c4a75558288d663267c8991f6bd37a530afDan Gohman } 6594183e31978146ea529a87a2fc47b96aeb6cbe000Dan Gohman 66074af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin // Usually, it does not make sense to initialize a value, 66174af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin // make an unrelated function call and use the value, because 66274af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin // it tends to be spilled on the stack. So, we move the pointer 66374af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin // to the last local value to the beginning of the block, so that 66474af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin // all the values which have already been materialized, 66574af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin // appear after the call. It also makes sense to skip intrinsics 66674af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin // since they tend to be inlined. 66774af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin if (!isa<IntrinsicInst>(F)) 66874af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin flushLocalValueMap(); 66974af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin 6704183e31978146ea529a87a2fc47b96aeb6cbe000Dan Gohman // An arbitrary call. Bail. 67133134c4a75558288d663267c8991f6bd37a530afDan Gohman return false; 67233134c4a75558288d663267c8991f6bd37a530afDan Gohman} 67333134c4a75558288d663267c8991f6bd37a530afDan Gohman 67446510a73e977273ec67747eb34cbdb43f815e451Dan Gohmanbool FastISel::SelectCast(const User *I, unsigned Opcode) { 675e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT SrcVT = TLI.getValueType(I->getOperand(0)->getType()); 676e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT DstVT = TLI.getValueType(I->getType()); 677bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 678825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson if (SrcVT == MVT::Other || !SrcVT.isSimple() || 679825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson DstVT == MVT::Other || !DstVT.isSimple()) 680d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson // Unhandled type. Halt "fast" selection and bail. 681d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson return false; 682bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 68376927d7303046058c627691bd45d6bff608f49f4Eli Friedman // Check if the destination type is legal. 684474d3b3f40e117a66946e9fb9d2016b4c05caef0Dan Gohman if (!TLI.isTypeLegal(DstVT)) 68576927d7303046058c627691bd45d6bff608f49f4Eli Friedman return false; 686474d3b3f40e117a66946e9fb9d2016b4c05caef0Dan Gohman 68776927d7303046058c627691bd45d6bff608f49f4Eli Friedman // Check if the source operand is legal. 688474d3b3f40e117a66946e9fb9d2016b4c05caef0Dan Gohman if (!TLI.isTypeLegal(SrcVT)) 68976927d7303046058c627691bd45d6bff608f49f4Eli Friedman return false; 690474d3b3f40e117a66946e9fb9d2016b4c05caef0Dan Gohman 6913df24e667f04a7003342b534310919abc9c87418Dan Gohman unsigned InputReg = getRegForValue(I->getOperand(0)); 692d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson if (!InputReg) 693d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson // Unhandled operand. Halt "fast" selection and bail. 694d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson return false; 69514ea1ec2324cb595f2e035bbf54ddcd483f17c11Dan Gohman 696a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman bool InputRegIsKill = hasTrivialKill(I->getOperand(0)); 697a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman 698d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson unsigned ResultReg = FastEmit_r(SrcVT.getSimpleVT(), 699d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson DstVT.getSimpleVT(), 700d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson Opcode, 701a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman InputReg, InputRegIsKill); 702d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson if (!ResultReg) 703d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson return false; 704bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 7053df24e667f04a7003342b534310919abc9c87418Dan Gohman UpdateValueMap(I, ResultReg); 706d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson return true; 707d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson} 708d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson 70946510a73e977273ec67747eb34cbdb43f815e451Dan Gohmanbool FastISel::SelectBitCast(const User *I) { 710ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman // If the bitcast doesn't change the type, just use the operand value. 711ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman if (I->getType() == I->getOperand(0)->getType()) { 7123df24e667f04a7003342b534310919abc9c87418Dan Gohman unsigned Reg = getRegForValue(I->getOperand(0)); 713a318dabc0edbcc7a2b54d99b026a093361ec14fcDan Gohman if (Reg == 0) 714a318dabc0edbcc7a2b54d99b026a093361ec14fcDan Gohman return false; 7153df24e667f04a7003342b534310919abc9c87418Dan Gohman UpdateValueMap(I, Reg); 716ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman return true; 717ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman } 718ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman 719bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck // Bitcasts of other values become reg-reg copies or BITCAST operators. 720e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT SrcVT = TLI.getValueType(I->getOperand(0)->getType()); 721e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT DstVT = TLI.getValueType(I->getType()); 722bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 723825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson if (SrcVT == MVT::Other || !SrcVT.isSimple() || 724825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson DstVT == MVT::Other || !DstVT.isSimple() || 725d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson !TLI.isTypeLegal(SrcVT) || !TLI.isTypeLegal(DstVT)) 726d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson // Unhandled type. Halt "fast" selection and bail. 727d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson return false; 728bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 7293df24e667f04a7003342b534310919abc9c87418Dan Gohman unsigned Op0 = getRegForValue(I->getOperand(0)); 730ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman if (Op0 == 0) 731ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman // Unhandled operand. Halt "fast" selection and bail. 732d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson return false; 733a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman 734a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman bool Op0IsKill = hasTrivialKill(I->getOperand(0)); 735bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 736ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman // First, try to perform the bitcast by inserting a reg-reg copy. 737ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman unsigned ResultReg = 0; 738ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman if (SrcVT.getSimpleVT() == DstVT.getSimpleVT()) { 739ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman TargetRegisterClass* SrcClass = TLI.getRegClassFor(SrcVT); 740ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman TargetRegisterClass* DstClass = TLI.getRegClassFor(DstVT); 741e7917bb207d5178dfb26066f839e4c295fd3a1ebJakob Stoklund Olesen // Don't attempt a cross-class copy. It will likely fail. 742e7917bb207d5178dfb26066f839e4c295fd3a1ebJakob Stoklund Olesen if (SrcClass == DstClass) { 743e7917bb207d5178dfb26066f839e4c295fd3a1ebJakob Stoklund Olesen ResultReg = createResultReg(DstClass); 744e7917bb207d5178dfb26066f839e4c295fd3a1ebJakob Stoklund Olesen BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 745e7917bb207d5178dfb26066f839e4c295fd3a1ebJakob Stoklund Olesen ResultReg).addReg(Op0); 746e7917bb207d5178dfb26066f839e4c295fd3a1ebJakob Stoklund Olesen } 747ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman } 748bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 749bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck // If the reg-reg copy failed, select a BITCAST opcode. 750ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman if (!ResultReg) 751ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman ResultReg = FastEmit_r(SrcVT.getSimpleVT(), DstVT.getSimpleVT(), 752bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck ISD::BITCAST, Op0, Op0IsKill); 753bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 754ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman if (!ResultReg) 755d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson return false; 756bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 7573df24e667f04a7003342b534310919abc9c87418Dan Gohman UpdateValueMap(I, ResultReg); 758d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson return true; 759d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson} 760d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson 7613df24e667f04a7003342b534310919abc9c87418Dan Gohmanbool 76246510a73e977273ec67747eb34cbdb43f815e451Dan GohmanFastISel::SelectInstruction(const Instruction *I) { 763e8c92dd439581bec7e3516cbdbea74e2e60fe7f0Dan Gohman // Just before the terminator instruction, insert instructions to 764e8c92dd439581bec7e3516cbdbea74e2e60fe7f0Dan Gohman // feed PHI nodes in successor blocks. 765e8c92dd439581bec7e3516cbdbea74e2e60fe7f0Dan Gohman if (isa<TerminatorInst>(I)) 766e8c92dd439581bec7e3516cbdbea74e2e60fe7f0Dan Gohman if (!HandlePHINodesInSuccessorBlocks(I->getParent())) 767e8c92dd439581bec7e3516cbdbea74e2e60fe7f0Dan Gohman return false; 768e8c92dd439581bec7e3516cbdbea74e2e60fe7f0Dan Gohman 7698ba3aa7f9c5048c31172788f98ad2b90ffad565aDan Gohman DL = I->getDebugLoc(); 7708ba3aa7f9c5048c31172788f98ad2b90ffad565aDan Gohman 7716e3ff375474c4fd78feb0b8463eb273a23cb4404Dan Gohman // First, try doing target-independent selection. 7728ba3aa7f9c5048c31172788f98ad2b90ffad565aDan Gohman if (SelectOperator(I, I->getOpcode())) { 773053e69ad5704a8e0e5f50d8b18f8917377ffacfbChad Rosier ++NumFastIselSuccessIndependent; 7748ba3aa7f9c5048c31172788f98ad2b90ffad565aDan Gohman DL = DebugLoc(); 7756e3ff375474c4fd78feb0b8463eb273a23cb4404Dan Gohman return true; 7768ba3aa7f9c5048c31172788f98ad2b90ffad565aDan Gohman } 7776e3ff375474c4fd78feb0b8463eb273a23cb4404Dan Gohman 7786e3ff375474c4fd78feb0b8463eb273a23cb4404Dan Gohman // Next, try calling the target to attempt to handle the instruction. 7798ba3aa7f9c5048c31172788f98ad2b90ffad565aDan Gohman if (TargetSelectInstruction(I)) { 780053e69ad5704a8e0e5f50d8b18f8917377ffacfbChad Rosier ++NumFastIselSuccessTarget; 7818ba3aa7f9c5048c31172788f98ad2b90ffad565aDan Gohman DL = DebugLoc(); 7826e3ff375474c4fd78feb0b8463eb273a23cb4404Dan Gohman return true; 7838ba3aa7f9c5048c31172788f98ad2b90ffad565aDan Gohman } 7846e3ff375474c4fd78feb0b8463eb273a23cb4404Dan Gohman 7858ba3aa7f9c5048c31172788f98ad2b90ffad565aDan Gohman DL = DebugLoc(); 7866e3ff375474c4fd78feb0b8463eb273a23cb4404Dan Gohman return false; 78740b189e4e257924d90aaf63bf2e12bc7bbca961aDan Gohman} 78840b189e4e257924d90aaf63bf2e12bc7bbca961aDan Gohman 789d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohman/// FastEmitBranch - Emit an unconditional branch to the given block, 790d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohman/// unless it is the immediate (fall-through) successor, and update 791d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohman/// the CFG. 792d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohmanvoid 7933bf912593301152b65accb9d9c37a95172f1df5aStuart HastingsFastISel::FastEmitBranch(MachineBasicBlock *MSucc, DebugLoc DL) { 79484023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman if (FuncInfo.MBB->isLayoutSuccessor(MSucc)) { 795d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohman // The unconditional fall-through case, which needs no instructions. 796d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohman } else { 797d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohman // The unconditional branch case. 79884023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman TII.InsertBranch(*FuncInfo.MBB, MSucc, NULL, 79984023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman SmallVector<MachineOperand, 0>(), DL); 800d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohman } 80184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman FuncInfo.MBB->addSuccessor(MSucc); 802d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohman} 803d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohman 8043d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman/// SelectFNeg - Emit an FNeg operation. 8053d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman/// 8063d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohmanbool 80746510a73e977273ec67747eb34cbdb43f815e451Dan GohmanFastISel::SelectFNeg(const User *I) { 8083d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman unsigned OpReg = getRegForValue(BinaryOperator::getFNegArgument(I)); 8093d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman if (OpReg == 0) return false; 8103d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman 811a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman bool OpRegIsKill = hasTrivialKill(I); 812a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman 8134a215a13c3035a8818254b61267be77def4a2a37Dan Gohman // If the target has ISD::FNEG, use it. 8144a215a13c3035a8818254b61267be77def4a2a37Dan Gohman EVT VT = TLI.getValueType(I->getType()); 8154a215a13c3035a8818254b61267be77def4a2a37Dan Gohman unsigned ResultReg = FastEmit_r(VT.getSimpleVT(), VT.getSimpleVT(), 816a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman ISD::FNEG, OpReg, OpRegIsKill); 8174a215a13c3035a8818254b61267be77def4a2a37Dan Gohman if (ResultReg != 0) { 8184a215a13c3035a8818254b61267be77def4a2a37Dan Gohman UpdateValueMap(I, ResultReg); 8194a215a13c3035a8818254b61267be77def4a2a37Dan Gohman return true; 8204a215a13c3035a8818254b61267be77def4a2a37Dan Gohman } 8214a215a13c3035a8818254b61267be77def4a2a37Dan Gohman 8225e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman // Bitcast the value to integer, twiddle the sign bit with xor, 8235e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman // and then bitcast it back to floating-point. 8243d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman if (VT.getSizeInBits() > 64) return false; 8255e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman EVT IntVT = EVT::getIntegerVT(I->getContext(), VT.getSizeInBits()); 8265e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman if (!TLI.isTypeLegal(IntVT)) 8275e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman return false; 8285e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman 8295e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman unsigned IntReg = FastEmit_r(VT.getSimpleVT(), IntVT.getSimpleVT(), 830bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck ISD::BITCAST, OpReg, OpRegIsKill); 8315e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman if (IntReg == 0) 8325e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman return false; 8335e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman 834a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned IntResultReg = FastEmit_ri_(IntVT.getSimpleVT(), ISD::XOR, 835a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IntReg, /*Kill=*/true, 8365e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman UINT64_C(1) << (VT.getSizeInBits()-1), 8375e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman IntVT.getSimpleVT()); 8385e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman if (IntResultReg == 0) 8395e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman return false; 8405e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman 8415e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman ResultReg = FastEmit_r(IntVT.getSimpleVT(), VT.getSimpleVT(), 842bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck ISD::BITCAST, IntResultReg, /*Kill=*/true); 8433d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman if (ResultReg == 0) 8443d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman return false; 8453d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman 8463d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman UpdateValueMap(I, ResultReg); 8473d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman return true; 8483d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman} 8493d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman 85040b189e4e257924d90aaf63bf2e12bc7bbca961aDan Gohmanbool 8512586b8f9366aed5a1efa44d3f18d095511601642Eli FriedmanFastISel::SelectExtractValue(const User *U) { 8522586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman const ExtractValueInst *EVI = dyn_cast<ExtractValueInst>(U); 853a4c920db7a3620f365144eac9aaad7ca23062caaEli Friedman if (!EVI) 8542586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman return false; 8552586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman 856482feb33b2bba677d47bab859d9e1e95d67016bdEli Friedman // Make sure we only try to handle extracts with a legal result. But also 857482feb33b2bba677d47bab859d9e1e95d67016bdEli Friedman // allow i1 because it's easy. 8582586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman EVT RealVT = TLI.getValueType(EVI->getType(), /*AllowUnknown=*/true); 8592586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman if (!RealVT.isSimple()) 8602586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman return false; 8612586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman MVT VT = RealVT.getSimpleVT(); 862482feb33b2bba677d47bab859d9e1e95d67016bdEli Friedman if (!TLI.isTypeLegal(VT) && VT != MVT::i1) 8632586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman return false; 8642586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman 8652586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman const Value *Op0 = EVI->getOperand(0); 866db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner Type *AggTy = Op0->getType(); 8672586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman 8682586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman // Get the base result register. 8692586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman unsigned ResultReg; 8702586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman DenseMap<const Value *, unsigned>::iterator I = FuncInfo.ValueMap.find(Op0); 8712586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman if (I != FuncInfo.ValueMap.end()) 8722586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman ResultReg = I->second; 8730b4d96baecf3fe6af0fd45ba815bacf91a017f97Eli Friedman else if (isa<Instruction>(Op0)) 8742586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman ResultReg = FuncInfo.InitializeRegForValue(Op0); 8750b4d96baecf3fe6af0fd45ba815bacf91a017f97Eli Friedman else 8760b4d96baecf3fe6af0fd45ba815bacf91a017f97Eli Friedman return false; // fast-isel can't handle aggregate constants at the moment 8772586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman 8782586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman // Get the actual result register, which is an offset from the base register. 879fc6d3a49867cd38954dc40936a88f1907252c6d2Jay Foad unsigned VTIndex = ComputeLinearIndex(AggTy, EVI->getIndices()); 8802586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman 8812586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman SmallVector<EVT, 4> AggValueVTs; 8822586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman ComputeValueVTs(TLI, AggTy, AggValueVTs); 8832586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman 8842586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman for (unsigned i = 0; i < VTIndex; i++) 8852586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman ResultReg += TLI.getNumRegisters(FuncInfo.Fn->getContext(), AggValueVTs[i]); 8862586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman 8872586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman UpdateValueMap(EVI, ResultReg); 8882586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman return true; 8892586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman} 8902586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman 8912586b8f9366aed5a1efa44d3f18d095511601642Eli Friedmanbool 89246510a73e977273ec67747eb34cbdb43f815e451Dan GohmanFastISel::SelectOperator(const User *I, unsigned Opcode) { 89340b189e4e257924d90aaf63bf2e12bc7bbca961aDan Gohman switch (Opcode) { 894ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman case Instruction::Add: 895ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman return SelectBinaryOp(I, ISD::ADD); 896ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman case Instruction::FAdd: 897ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman return SelectBinaryOp(I, ISD::FADD); 898ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman case Instruction::Sub: 899ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman return SelectBinaryOp(I, ISD::SUB); 900ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman case Instruction::FSub: 9013d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman // FNeg is currently represented in LLVM IR as a special case of FSub. 9023d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman if (BinaryOperator::isFNeg(I)) 9033d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman return SelectFNeg(I); 904ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman return SelectBinaryOp(I, ISD::FSUB); 905ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman case Instruction::Mul: 906ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman return SelectBinaryOp(I, ISD::MUL); 907ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman case Instruction::FMul: 908ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman return SelectBinaryOp(I, ISD::FMUL); 9093df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::SDiv: 9103df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::SDIV); 9113df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::UDiv: 9123df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::UDIV); 9133df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::FDiv: 9143df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::FDIV); 9153df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::SRem: 9163df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::SREM); 9173df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::URem: 9183df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::UREM); 9193df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::FRem: 9203df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::FREM); 9213df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::Shl: 9223df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::SHL); 9233df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::LShr: 9243df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::SRL); 9253df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::AShr: 9263df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::SRA); 9273df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::And: 9283df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::AND); 9293df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::Or: 9303df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::OR); 9313df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::Xor: 9323df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::XOR); 9333df24e667f04a7003342b534310919abc9c87418Dan Gohman 9343df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::GetElementPtr: 9353df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectGetElementPtr(I); 9363df24e667f04a7003342b534310919abc9c87418Dan Gohman 9373df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::Br: { 93846510a73e977273ec67747eb34cbdb43f815e451Dan Gohman const BranchInst *BI = cast<BranchInst>(I); 9393df24e667f04a7003342b534310919abc9c87418Dan Gohman 9403df24e667f04a7003342b534310919abc9c87418Dan Gohman if (BI->isUnconditional()) { 94146510a73e977273ec67747eb34cbdb43f815e451Dan Gohman const BasicBlock *LLVMSucc = BI->getSuccessor(0); 942a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman MachineBasicBlock *MSucc = FuncInfo.MBBMap[LLVMSucc]; 9433bf912593301152b65accb9d9c37a95172f1df5aStuart Hastings FastEmitBranch(MSucc, BI->getDebugLoc()); 9443df24e667f04a7003342b534310919abc9c87418Dan Gohman return true; 9459d5b41624003daf259b33fc953aa471049700353Owen Anderson } 9463df24e667f04a7003342b534310919abc9c87418Dan Gohman 9473df24e667f04a7003342b534310919abc9c87418Dan Gohman // Conditional branches are not handed yet. 9483df24e667f04a7003342b534310919abc9c87418Dan Gohman // Halt "fast" selection and bail. 9493df24e667f04a7003342b534310919abc9c87418Dan Gohman return false; 950b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman } 951b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 952087c8507e592bbbede1746f07bd44b28559e3684Dan Gohman case Instruction::Unreachable: 953087c8507e592bbbede1746f07bd44b28559e3684Dan Gohman // Nothing to emit. 954087c8507e592bbbede1746f07bd44b28559e3684Dan Gohman return true; 955087c8507e592bbbede1746f07bd44b28559e3684Dan Gohman 9560586d91bb3e516d5826826522d9a90ed6ef74d86Dan Gohman case Instruction::Alloca: 9570586d91bb3e516d5826826522d9a90ed6ef74d86Dan Gohman // FunctionLowering has the static-sized case covered. 958a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman if (FuncInfo.StaticAllocaMap.count(cast<AllocaInst>(I))) 9590586d91bb3e516d5826826522d9a90ed6ef74d86Dan Gohman return true; 9600586d91bb3e516d5826826522d9a90ed6ef74d86Dan Gohman 9610586d91bb3e516d5826826522d9a90ed6ef74d86Dan Gohman // Dynamic-sized alloca is not handled yet. 9620586d91bb3e516d5826826522d9a90ed6ef74d86Dan Gohman return false; 963bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 96433134c4a75558288d663267c8991f6bd37a530afDan Gohman case Instruction::Call: 96533134c4a75558288d663267c8991f6bd37a530afDan Gohman return SelectCall(I); 966bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 9673df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::BitCast: 9683df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBitCast(I); 9693df24e667f04a7003342b534310919abc9c87418Dan Gohman 9703df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::FPToSI: 9713df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectCast(I, ISD::FP_TO_SINT); 9723df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::ZExt: 9733df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectCast(I, ISD::ZERO_EXTEND); 9743df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::SExt: 9753df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectCast(I, ISD::SIGN_EXTEND); 9763df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::Trunc: 9773df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectCast(I, ISD::TRUNCATE); 9783df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::SIToFP: 9793df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectCast(I, ISD::SINT_TO_FP); 9803df24e667f04a7003342b534310919abc9c87418Dan Gohman 9813df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::IntToPtr: // Deliberate fall-through. 9823df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::PtrToInt: { 983e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT SrcVT = TLI.getValueType(I->getOperand(0)->getType()); 984e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT DstVT = TLI.getValueType(I->getType()); 9853df24e667f04a7003342b534310919abc9c87418Dan Gohman if (DstVT.bitsGT(SrcVT)) 9863df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectCast(I, ISD::ZERO_EXTEND); 9873df24e667f04a7003342b534310919abc9c87418Dan Gohman if (DstVT.bitsLT(SrcVT)) 9883df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectCast(I, ISD::TRUNCATE); 9893df24e667f04a7003342b534310919abc9c87418Dan Gohman unsigned Reg = getRegForValue(I->getOperand(0)); 9903df24e667f04a7003342b534310919abc9c87418Dan Gohman if (Reg == 0) return false; 9913df24e667f04a7003342b534310919abc9c87418Dan Gohman UpdateValueMap(I, Reg); 9923df24e667f04a7003342b534310919abc9c87418Dan Gohman return true; 9933df24e667f04a7003342b534310919abc9c87418Dan Gohman } 994d57dd5f4e6740520820bc0fca42a540e31c27a73Dan Gohman 9952586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman case Instruction::ExtractValue: 9962586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman return SelectExtractValue(I); 9972586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman 998ba5be5c07bb19dcf484e3aa40cd139dd07c10407Dan Gohman case Instruction::PHI: 999ba5be5c07bb19dcf484e3aa40cd139dd07c10407Dan Gohman llvm_unreachable("FastISel shouldn't visit PHI nodes!"); 1000ba5be5c07bb19dcf484e3aa40cd139dd07c10407Dan Gohman 10013df24e667f04a7003342b534310919abc9c87418Dan Gohman default: 10023df24e667f04a7003342b534310919abc9c87418Dan Gohman // Unhandled instruction. Halt "fast" selection and bail. 10033df24e667f04a7003342b534310919abc9c87418Dan Gohman return false; 10043df24e667f04a7003342b534310919abc9c87418Dan Gohman } 1005b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman} 1006b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 1007a4160c3434b08288d1f79f1acbe453d1b9610b22Dan GohmanFastISel::FastISel(FunctionLoweringInfo &funcInfo) 100884023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman : FuncInfo(funcInfo), 1009a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman MRI(FuncInfo.MF->getRegInfo()), 1010a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman MFI(*FuncInfo.MF->getFrameInfo()), 1011a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman MCP(*FuncInfo.MF->getConstantPool()), 1012a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman TM(FuncInfo.MF->getTarget()), 101322bb31103de3337f0bb74c7bee16d1817d4dca14Dan Gohman TD(*TM.getTargetData()), 101422bb31103de3337f0bb74c7bee16d1817d4dca14Dan Gohman TII(*TM.getInstrInfo()), 1015a7a0ed79012ea36f838239cf1d04959711aec2a9Dan Gohman TLI(*TM.getTargetLowering()), 101684023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman TRI(*TM.getRegisterInfo()) { 1017bb466331e7e50d03497ce40ee344870236fd9c32Dan Gohman} 1018bb466331e7e50d03497ce40ee344870236fd9c32Dan Gohman 1019e285a74f7cf9dd3ccf4fe758576cf83301f8a43eDan GohmanFastISel::~FastISel() {} 1020e285a74f7cf9dd3ccf4fe758576cf83301f8a43eDan Gohman 1021825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Andersonunsigned FastISel::FastEmit_(MVT, MVT, 10227c3ecb6838ef7a2ca306c0f3cd68022f0855ae71Dan Gohman unsigned) { 1023b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman return 0; 1024b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman} 1025b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 1026825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Andersonunsigned FastISel::FastEmit_r(MVT, MVT, 1027a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned, 1028a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned /*Op0*/, bool /*Op0IsKill*/) { 1029b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman return 0; 1030b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman} 1031b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 1032bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peckunsigned FastISel::FastEmit_rr(MVT, MVT, 1033a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned, 1034a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned /*Op0*/, bool /*Op0IsKill*/, 1035a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned /*Op1*/, bool /*Op1IsKill*/) { 1036b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman return 0; 1037b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman} 1038b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 10397c3ecb6838ef7a2ca306c0f3cd68022f0855ae71Dan Gohmanunsigned FastISel::FastEmit_i(MVT, MVT, unsigned, uint64_t /*Imm*/) { 104083785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng return 0; 104183785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng} 104283785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng 1043825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Andersonunsigned FastISel::FastEmit_f(MVT, MVT, 104446510a73e977273ec67747eb34cbdb43f815e451Dan Gohman unsigned, const ConstantFP * /*FPImm*/) { 104510df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman return 0; 104610df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman} 104710df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman 1048825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Andersonunsigned FastISel::FastEmit_ri(MVT, MVT, 1049a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned, 1050a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned /*Op0*/, bool /*Op0IsKill*/, 10510f84e4e31009eecf2dfcbe6113b65d0919f30254Owen Anderson uint64_t /*Imm*/) { 1052d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman return 0; 1053d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman} 1054d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman 1055825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Andersonunsigned FastISel::FastEmit_rf(MVT, MVT, 1056a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned, 1057a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned /*Op0*/, bool /*Op0IsKill*/, 105846510a73e977273ec67747eb34cbdb43f815e451Dan Gohman const ConstantFP * /*FPImm*/) { 105910df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman return 0; 106010df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman} 106110df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman 1062825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Andersonunsigned FastISel::FastEmit_rri(MVT, MVT, 10637c3ecb6838ef7a2ca306c0f3cd68022f0855ae71Dan Gohman unsigned, 1064a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned /*Op0*/, bool /*Op0IsKill*/, 1065a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned /*Op1*/, bool /*Op1IsKill*/, 1066d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman uint64_t /*Imm*/) { 106783785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng return 0; 106883785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng} 106983785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng 107083785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng/// FastEmit_ri_ - This method is a wrapper of FastEmit_ri. It first tries 107183785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng/// to emit an instruction with an immediate operand using FastEmit_ri. 107283785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng/// If that fails, it materializes the immediate into a register and try 107383785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng/// FastEmit_rr instead. 10747c3ecb6838ef7a2ca306c0f3cd68022f0855ae71Dan Gohmanunsigned FastISel::FastEmit_ri_(MVT VT, unsigned Opcode, 1075a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned Op0, bool Op0IsKill, 1076a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman uint64_t Imm, MVT ImmType) { 1077602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner // If this is a multiply by a power of two, emit this as a shift left. 1078602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner if (Opcode == ISD::MUL && isPowerOf2_64(Imm)) { 1079602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner Opcode = ISD::SHL; 1080602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner Imm = Log2_64(Imm); 1081090ca9108b35a60e8b97b67987d00cf47a383dbaChris Lattner } else if (Opcode == ISD::UDIV && isPowerOf2_64(Imm)) { 1082090ca9108b35a60e8b97b67987d00cf47a383dbaChris Lattner // div x, 8 -> srl x, 3 1083090ca9108b35a60e8b97b67987d00cf47a383dbaChris Lattner Opcode = ISD::SRL; 1084090ca9108b35a60e8b97b67987d00cf47a383dbaChris Lattner Imm = Log2_64(Imm); 1085602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner } 1086d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 1087602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner // Horrible hack (to be removed), check to make sure shift amounts are 1088602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner // in-range. 1089602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner if ((Opcode == ISD::SHL || Opcode == ISD::SRA || Opcode == ISD::SRL) && 1090602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner Imm >= VT.getSizeInBits()) 1091602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner return 0; 1092d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 109383785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // First check if immediate type is legal. If not, we can't use the ri form. 1094a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned ResultReg = FastEmit_ri(VT, VT, Opcode, Op0, Op0IsKill, Imm); 109583785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng if (ResultReg != 0) 109683785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng return ResultReg; 10970f84e4e31009eecf2dfcbe6113b65d0919f30254Owen Anderson unsigned MaterialReg = FastEmit_i(ImmType, ImmType, ISD::Constant, Imm); 1098b2b03fc2fa87cb5604dd8ec2e8476d051186cdb3Eli Friedman if (MaterialReg == 0) { 1099b2b03fc2fa87cb5604dd8ec2e8476d051186cdb3Eli Friedman // This is a bit ugly/slow, but failing here means falling out of 1100b2b03fc2fa87cb5604dd8ec2e8476d051186cdb3Eli Friedman // fast-isel, which would be very slow. 1101db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner IntegerType *ITy = IntegerType::get(FuncInfo.Fn->getContext(), 1102b2b03fc2fa87cb5604dd8ec2e8476d051186cdb3Eli Friedman VT.getSizeInBits()); 1103b2b03fc2fa87cb5604dd8ec2e8476d051186cdb3Eli Friedman MaterialReg = getRegForValue(ConstantInt::get(ITy, Imm)); 1104b2b03fc2fa87cb5604dd8ec2e8476d051186cdb3Eli Friedman } 1105a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman return FastEmit_rr(VT, VT, Opcode, 1106a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman Op0, Op0IsKill, 1107a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman MaterialReg, /*Kill=*/true); 1108d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman} 1109d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman 1110d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohmanunsigned FastISel::createResultReg(const TargetRegisterClass* RC) { 1111d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman return MRI.createVirtualRegister(RC); 111283785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng} 111383785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng 1114b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohmanunsigned FastISel::FastEmitInst_(unsigned MachineInstOpcode, 111577ad79689d755c49146f534107421cb3d9703fedDan Gohman const TargetRegisterClass* RC) { 1116d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman unsigned ResultReg = createResultReg(RC); 1117e837dead3c8dc3445ef6a0e2322179c57e264a13Evan Cheng const MCInstrDesc &II = TII.get(MachineInstOpcode); 1118b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 111984023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg); 1120b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman return ResultReg; 1121b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman} 1122b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 1123b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohmanunsigned FastISel::FastEmitInst_r(unsigned MachineInstOpcode, 1124b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman const TargetRegisterClass *RC, 1125a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned Op0, bool Op0IsKill) { 1126d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman unsigned ResultReg = createResultReg(RC); 1127e837dead3c8dc3445ef6a0e2322179c57e264a13Evan Cheng const MCInstrDesc &II = TII.get(MachineInstOpcode); 1128b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 11295960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng if (II.getNumDefs() >= 1) 113084023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg) 113184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill); 11325960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng else { 113384023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 113484023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill); 1135e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 1136e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen ResultReg).addReg(II.ImplicitDefs[0]); 11375960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng } 11385960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng 1139b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman return ResultReg; 1140b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman} 1141b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 1142b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohmanunsigned FastISel::FastEmitInst_rr(unsigned MachineInstOpcode, 1143b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman const TargetRegisterClass *RC, 1144a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned Op0, bool Op0IsKill, 1145a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned Op1, bool Op1IsKill) { 1146d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman unsigned ResultReg = createResultReg(RC); 1147e837dead3c8dc3445ef6a0e2322179c57e264a13Evan Cheng const MCInstrDesc &II = TII.get(MachineInstOpcode); 1148b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 11495960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng if (II.getNumDefs() >= 1) 115084023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg) 1151a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill) 1152a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op1, Op1IsKill * RegState::Kill); 11535960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng else { 115484023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 1155a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill) 1156a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op1, Op1IsKill * RegState::Kill); 1157e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 1158e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen ResultReg).addReg(II.ImplicitDefs[0]); 11595960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng } 1160b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman return ResultReg; 1161b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman} 1162d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman 1163d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Andersonunsigned FastISel::FastEmitInst_rrr(unsigned MachineInstOpcode, 1164d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson const TargetRegisterClass *RC, 1165d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson unsigned Op0, bool Op0IsKill, 1166d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson unsigned Op1, bool Op1IsKill, 1167d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson unsigned Op2, bool Op2IsKill) { 1168d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson unsigned ResultReg = createResultReg(RC); 1169e837dead3c8dc3445ef6a0e2322179c57e264a13Evan Cheng const MCInstrDesc &II = TII.get(MachineInstOpcode); 1170d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson 1171d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson if (II.getNumDefs() >= 1) 1172d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg) 1173d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson .addReg(Op0, Op0IsKill * RegState::Kill) 1174d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson .addReg(Op1, Op1IsKill * RegState::Kill) 1175d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson .addReg(Op2, Op2IsKill * RegState::Kill); 1176d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson else { 1177d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 1178d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson .addReg(Op0, Op0IsKill * RegState::Kill) 1179d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson .addReg(Op1, Op1IsKill * RegState::Kill) 1180d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson .addReg(Op2, Op2IsKill * RegState::Kill); 1181d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 1182d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson ResultReg).addReg(II.ImplicitDefs[0]); 1183d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson } 1184d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson return ResultReg; 1185d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson} 1186d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson 1187d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohmanunsigned FastISel::FastEmitInst_ri(unsigned MachineInstOpcode, 1188d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman const TargetRegisterClass *RC, 1189a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned Op0, bool Op0IsKill, 1190a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman uint64_t Imm) { 1191d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman unsigned ResultReg = createResultReg(RC); 1192e837dead3c8dc3445ef6a0e2322179c57e264a13Evan Cheng const MCInstrDesc &II = TII.get(MachineInstOpcode); 1193d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman 11945960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng if (II.getNumDefs() >= 1) 119584023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg) 1196a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill) 1197a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addImm(Imm); 11985960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng else { 119984023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 1200a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill) 1201a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addImm(Imm); 1202e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 1203e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen ResultReg).addReg(II.ImplicitDefs[0]); 12045960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng } 1205d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman return ResultReg; 1206d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman} 1207d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman 12082ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Andersonunsigned FastISel::FastEmitInst_rii(unsigned MachineInstOpcode, 12092ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson const TargetRegisterClass *RC, 12102ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson unsigned Op0, bool Op0IsKill, 12112ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson uint64_t Imm1, uint64_t Imm2) { 12122ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson unsigned ResultReg = createResultReg(RC); 1213e837dead3c8dc3445ef6a0e2322179c57e264a13Evan Cheng const MCInstrDesc &II = TII.get(MachineInstOpcode); 12142ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson 12152ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson if (II.getNumDefs() >= 1) 12162ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg) 12172ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson .addReg(Op0, Op0IsKill * RegState::Kill) 12182ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson .addImm(Imm1) 12192ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson .addImm(Imm2); 12202ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson else { 12212ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 12222ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson .addReg(Op0, Op0IsKill * RegState::Kill) 12232ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson .addImm(Imm1) 12242ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson .addImm(Imm2); 12252ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 12262ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson ResultReg).addReg(II.ImplicitDefs[0]); 12272ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson } 12282ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson return ResultReg; 12292ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson} 12302ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson 123110df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohmanunsigned FastISel::FastEmitInst_rf(unsigned MachineInstOpcode, 123210df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman const TargetRegisterClass *RC, 1233a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned Op0, bool Op0IsKill, 1234a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman const ConstantFP *FPImm) { 123510df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman unsigned ResultReg = createResultReg(RC); 1236e837dead3c8dc3445ef6a0e2322179c57e264a13Evan Cheng const MCInstrDesc &II = TII.get(MachineInstOpcode); 123710df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman 12385960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng if (II.getNumDefs() >= 1) 123984023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg) 1240a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill) 1241a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addFPImm(FPImm); 12425960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng else { 124384023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 1244a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill) 1245a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addFPImm(FPImm); 1246e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 1247e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen ResultReg).addReg(II.ImplicitDefs[0]); 12485960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng } 124910df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman return ResultReg; 125010df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman} 125110df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman 1252d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohmanunsigned FastISel::FastEmitInst_rri(unsigned MachineInstOpcode, 1253d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman const TargetRegisterClass *RC, 1254a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned Op0, bool Op0IsKill, 1255a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned Op1, bool Op1IsKill, 1256a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman uint64_t Imm) { 1257d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman unsigned ResultReg = createResultReg(RC); 1258e837dead3c8dc3445ef6a0e2322179c57e264a13Evan Cheng const MCInstrDesc &II = TII.get(MachineInstOpcode); 1259d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman 12605960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng if (II.getNumDefs() >= 1) 126184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg) 1262a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill) 1263a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op1, Op1IsKill * RegState::Kill) 1264a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addImm(Imm); 12655960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng else { 126684023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 1267a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill) 1268a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op1, Op1IsKill * RegState::Kill) 1269a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addImm(Imm); 1270e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 1271e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen ResultReg).addReg(II.ImplicitDefs[0]); 12725960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng } 1273d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman return ResultReg; 1274d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman} 12756d0c25ec3a7ca822e68f73a4481eee43eb5c9485Owen Anderson 12766d0c25ec3a7ca822e68f73a4481eee43eb5c9485Owen Andersonunsigned FastISel::FastEmitInst_i(unsigned MachineInstOpcode, 12776d0c25ec3a7ca822e68f73a4481eee43eb5c9485Owen Anderson const TargetRegisterClass *RC, 12786d0c25ec3a7ca822e68f73a4481eee43eb5c9485Owen Anderson uint64_t Imm) { 12796d0c25ec3a7ca822e68f73a4481eee43eb5c9485Owen Anderson unsigned ResultReg = createResultReg(RC); 1280e837dead3c8dc3445ef6a0e2322179c57e264a13Evan Cheng const MCInstrDesc &II = TII.get(MachineInstOpcode); 1281bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 12825960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng if (II.getNumDefs() >= 1) 128384023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg).addImm(Imm); 12845960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng else { 128584023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II).addImm(Imm); 1286e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 1287e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen ResultReg).addReg(II.ImplicitDefs[0]); 12885960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng } 12896d0c25ec3a7ca822e68f73a4481eee43eb5c9485Owen Anderson return ResultReg; 1290b41aec54767a825ac54c8822e787700bb08a3460Evan Cheng} 12918970f00deff00ffce1f35cf00883357e1582daa1Owen Anderson 1292d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Andersonunsigned FastISel::FastEmitInst_ii(unsigned MachineInstOpcode, 1293d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson const TargetRegisterClass *RC, 1294d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson uint64_t Imm1, uint64_t Imm2) { 1295d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson unsigned ResultReg = createResultReg(RC); 1296e837dead3c8dc3445ef6a0e2322179c57e264a13Evan Cheng const MCInstrDesc &II = TII.get(MachineInstOpcode); 1297d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 1298d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson if (II.getNumDefs() >= 1) 1299d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg) 1300d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson .addImm(Imm1).addImm(Imm2); 1301d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson else { 1302d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II).addImm(Imm1).addImm(Imm2); 1303d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 1304d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson ResultReg).addReg(II.ImplicitDefs[0]); 1305d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson } 1306d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson return ResultReg; 1307d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson} 1308d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 1309825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Andersonunsigned FastISel::FastEmitInst_extractsubreg(MVT RetVT, 1310a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned Op0, bool Op0IsKill, 1311a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman uint32_t Idx) { 1312536ab130ec95cbb7bf30530251dafa7dfecc8471Evan Cheng unsigned ResultReg = createResultReg(TLI.getRegClassFor(RetVT)); 13130bc25f40402f48ba42fc45403f635b20d90fabb3Jakob Stoklund Olesen assert(TargetRegisterInfo::isVirtualRegister(Op0) && 13140bc25f40402f48ba42fc45403f635b20d90fabb3Jakob Stoklund Olesen "Cannot yet extract from physregs"); 131584023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, 131684023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman DL, TII.get(TargetOpcode::COPY), ResultReg) 13170bc25f40402f48ba42fc45403f635b20d90fabb3Jakob Stoklund Olesen .addReg(Op0, getKillRegState(Op0IsKill), Idx); 13188970f00deff00ffce1f35cf00883357e1582daa1Owen Anderson return ResultReg; 13198970f00deff00ffce1f35cf00883357e1582daa1Owen Anderson} 132014ea1ec2324cb595f2e035bbf54ddcd483f17c11Dan Gohman 132114ea1ec2324cb595f2e035bbf54ddcd483f17c11Dan Gohman/// FastEmitZExtFromI1 - Emit MachineInstrs to compute the value of Op 132214ea1ec2324cb595f2e035bbf54ddcd483f17c11Dan Gohman/// with all but the least significant bit set to zero. 1323a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohmanunsigned FastISel::FastEmitZExtFromI1(MVT VT, unsigned Op0, bool Op0IsKill) { 1324a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman return FastEmit_ri(VT, VT, ISD::AND, Op0, Op0IsKill, 1); 132514ea1ec2324cb595f2e035bbf54ddcd483f17c11Dan Gohman} 1326f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1327f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman/// HandlePHINodesInSuccessorBlocks - Handle PHI nodes in successor blocks. 1328f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman/// Emit code to ensure constants are copied into registers when needed. 1329f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman/// Remember the virtual registers that need to be added to the Machine PHI 1330f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman/// nodes as input. We cannot just directly add them, because expansion 1331f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman/// might result in multiple MBB's for one BB. As such, the start of the 1332f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman/// BB might correspond to a different MBB than the end. 1333f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohmanbool FastISel::HandlePHINodesInSuccessorBlocks(const BasicBlock *LLVMBB) { 1334f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman const TerminatorInst *TI = LLVMBB->getTerminator(); 1335f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1336f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman SmallPtrSet<MachineBasicBlock *, 4> SuccsHandled; 1337a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman unsigned OrigNumPHINodesToUpdate = FuncInfo.PHINodesToUpdate.size(); 1338f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1339f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // Check successor nodes' PHI nodes that expect a constant to be available 1340f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // from this block. 1341f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman for (unsigned succ = 0, e = TI->getNumSuccessors(); succ != e; ++succ) { 1342f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman const BasicBlock *SuccBB = TI->getSuccessor(succ); 1343f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman if (!isa<PHINode>(SuccBB->begin())) continue; 1344a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman MachineBasicBlock *SuccMBB = FuncInfo.MBBMap[SuccBB]; 1345f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1346f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // If this terminator has multiple identical successors (common for 1347f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // switches), only handle each succ once. 1348f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman if (!SuccsHandled.insert(SuccMBB)) continue; 1349f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1350f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman MachineBasicBlock::iterator MBBI = SuccMBB->begin(); 1351f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1352f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // At this point we know that there is a 1-1 correspondence between LLVM PHI 1353f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // nodes and Machine PHI nodes, but the incoming operands have not been 1354f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // emitted yet. 1355f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman for (BasicBlock::const_iterator I = SuccBB->begin(); 1356f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman const PHINode *PN = dyn_cast<PHINode>(I); ++I) { 1357fb95f89e8ebd0b71408472e2544e2b8d6d4738e5Dan Gohman 1358f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // Ignore dead phi's. 1359f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman if (PN->use_empty()) continue; 1360f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1361f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // Only handle legal types. Two interesting things to note here. First, 1362f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // by bailing out early, we may leave behind some dead instructions, 1363f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // since SelectionDAG's HandlePHINodesInSuccessorBlocks will insert its 13647a2bdde0a0eebcd2125055e0eacaca040f0b766cChris Lattner // own moves. Second, this check is necessary because FastISel doesn't 136589496d0eb73ab8771b27b3d9c1db6492d8eefc3aDan Gohman // use CreateRegs to create registers, so it always creates 1366f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // exactly one register for each non-void instruction. 1367f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman EVT VT = TLI.getValueType(PN->getType(), /*AllowUnknown=*/true); 1368f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman if (VT == MVT::Other || !TLI.isTypeLegal(VT)) { 1369f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // Promote MVT::i1. 1370f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman if (VT == MVT::i1) 1371f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman VT = TLI.getTypeToTransformTo(LLVMBB->getContext(), VT); 1372f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman else { 1373a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman FuncInfo.PHINodesToUpdate.resize(OrigNumPHINodesToUpdate); 1374f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman return false; 1375f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman } 1376f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman } 1377f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1378f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman const Value *PHIOp = PN->getIncomingValueForBlock(LLVMBB); 1379f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1380fb95f89e8ebd0b71408472e2544e2b8d6d4738e5Dan Gohman // Set the DebugLoc for the copy. Prefer the location of the operand 1381fb95f89e8ebd0b71408472e2544e2b8d6d4738e5Dan Gohman // if there is one; use the location of the PHI otherwise. 1382fb95f89e8ebd0b71408472e2544e2b8d6d4738e5Dan Gohman DL = PN->getDebugLoc(); 1383fb95f89e8ebd0b71408472e2544e2b8d6d4738e5Dan Gohman if (const Instruction *Inst = dyn_cast<Instruction>(PHIOp)) 1384fb95f89e8ebd0b71408472e2544e2b8d6d4738e5Dan Gohman DL = Inst->getDebugLoc(); 1385fb95f89e8ebd0b71408472e2544e2b8d6d4738e5Dan Gohman 1386f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman unsigned Reg = getRegForValue(PHIOp); 1387f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman if (Reg == 0) { 1388a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman FuncInfo.PHINodesToUpdate.resize(OrigNumPHINodesToUpdate); 1389f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman return false; 1390f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman } 1391a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman FuncInfo.PHINodesToUpdate.push_back(std::make_pair(MBBI++, Reg)); 1392fb95f89e8ebd0b71408472e2544e2b8d6d4738e5Dan Gohman DL = DebugLoc(); 1393f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman } 1394f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman } 1395f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1396f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman return true; 1397f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman} 1398