FastISel.cpp revision bd1253809bc1b2455793a64d2801db3d6317b08e
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 4233134c4a75558288d663267c8991f6bd37a530afDan Gohman#include "llvm/Function.h" 4333134c4a75558288d663267c8991f6bd37a530afDan Gohman#include "llvm/GlobalVariable.h" 446f2766d59744bb3d48867f3151643eac7111e773Dan Gohman#include "llvm/Instructions.h" 4533134c4a75558288d663267c8991f6bd37a530afDan Gohman#include "llvm/IntrinsicInst.h" 46562b84b3aea359d1f918184e355da82bf05eb290Jay Foad#include "llvm/Operator.h" 47b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman#include "llvm/CodeGen/FastISel.h" 484c3fd9f92f89810d659973d2666ab729758de64aDan Gohman#include "llvm/CodeGen/FunctionLoweringInfo.h" 49b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman#include "llvm/CodeGen/MachineInstrBuilder.h" 5033134c4a75558288d663267c8991f6bd37a530afDan Gohman#include "llvm/CodeGen/MachineModuleInfo.h" 51b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman#include "llvm/CodeGen/MachineRegisterInfo.h" 5283489bb7700c69b7a4a8da59365c42d3f5c8129bDevang Patel#include "llvm/Analysis/DebugInfo.h" 537fbcc98f20c062273bf16ce9832f40e5b8a205c6Dan Gohman#include "llvm/Analysis/Loads.h" 5483785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng#include "llvm/Target/TargetData.h" 55b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman#include "llvm/Target/TargetInstrInfo.h" 5683785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng#include "llvm/Target/TargetLowering.h" 57bb466331e7e50d03497ce40ee344870236fd9c32Dan Gohman#include "llvm/Target/TargetMachine.h" 58ba5be5c07bb19dcf484e3aa40cd139dd07c10407Dan Gohman#include "llvm/Support/ErrorHandling.h" 59afeaae7a940ce16e7874af31f3e5e91d8ca89e19Devang Patel#include "llvm/Support/Debug.h" 60b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohmanusing namespace llvm; 61b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 6284023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman/// startNewBlock - Set the current block to which generated machine 6384023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman/// instructions will be appended, and clear the local CSE map. 6484023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman/// 6584023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohmanvoid FastISel::startNewBlock() { 6684023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman LocalValueMap.clear(); 6784023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 6884023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman // Start out as null, meaining no local-value instructions have 6984023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman // been emitted. 7084023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman LastLocalValue = 0; 7184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 7284023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman // Advance the last local value past any EH_LABEL instructions. 7384023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman MachineBasicBlock::iterator 7484023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman I = FuncInfo.MBB->begin(), E = FuncInfo.MBB->end(); 7584023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman while (I != E && I->getOpcode() == TargetOpcode::EH_LABEL) { 7684023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman LastLocalValue = I; 7784023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman ++I; 7884023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman } 7984023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman} 8084023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 81a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohmanbool FastISel::hasTrivialKill(const Value *V) const { 827f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman // Don't consider constants or arguments to have trivial kills. 83a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman const Instruction *I = dyn_cast<Instruction>(V); 847f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman if (!I) 857f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman return false; 867f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman 877f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman // No-op casts are trivially coalesced by fast-isel. 887f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman if (const CastInst *Cast = dyn_cast<CastInst>(I)) 897f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman if (Cast->isNoopCast(TD.getIntPtrType(Cast->getContext())) && 907f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman !hasTrivialKill(Cast->getOperand(0))) 917f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman return false; 927f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman 937f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman // Only instructions with a single use in the same basic block are considered 947f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman // to have trivial kills. 957f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman return I->hasOneUse() && 967f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman !(I->getOpcode() == Instruction::BitCast || 977f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman I->getOpcode() == Instruction::PtrToInt || 987f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman I->getOpcode() == Instruction::IntToPtr) && 9996f1d8ebdd33b3f9bdb3b1163f36072c68599f42Gabor Greif cast<Instruction>(*I->use_begin())->getParent() == I->getParent(); 100a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman} 101a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman 10246510a73e977273ec67747eb34cbdb43f815e451Dan Gohmanunsigned FastISel::getRegForValue(const Value *V) { 103e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT RealVT = TLI.getValueType(V->getType(), /*AllowUnknown=*/true); 1044fd552880c9f42f117bd79929ea0179f99bd6bb7Dan Gohman // Don't handle non-simple values in FastISel. 1054fd552880c9f42f117bd79929ea0179f99bd6bb7Dan Gohman if (!RealVT.isSimple()) 1064fd552880c9f42f117bd79929ea0179f99bd6bb7Dan Gohman return 0; 107821164875706dd28e48c6cc3cea5c8ffa6e658d1Dan Gohman 108c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman // Ignore illegal types. We must do this before looking up the value 109c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman // in ValueMap because Arguments are given virtual registers regardless 110c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman // of whether FastISel can handle them. 111825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson MVT VT = RealVT.getSimpleVT(); 112821164875706dd28e48c6cc3cea5c8ffa6e658d1Dan Gohman if (!TLI.isTypeLegal(VT)) { 113825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson // Promote MVT::i1 to a legal type though, because it's common and easy. 114825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson if (VT == MVT::i1) 11523b9b19b1a5a00faa9fce0788155c7dbfd00bfb1Owen Anderson VT = TLI.getTypeToTransformTo(V->getContext(), VT).getSimpleVT(); 116821164875706dd28e48c6cc3cea5c8ffa6e658d1Dan Gohman else 117821164875706dd28e48c6cc3cea5c8ffa6e658d1Dan Gohman return 0; 118821164875706dd28e48c6cc3cea5c8ffa6e658d1Dan Gohman } 119821164875706dd28e48c6cc3cea5c8ffa6e658d1Dan Gohman 120c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman // Look up the value to see if we already have a register for it. We 121c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman // cache values defined by Instructions across blocks, and other values 122c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman // only locally. This is because Instructions already have the SSA 1235c9cf19d1e7d044e786f03331bc3f004966a69d2Dan Gohman // def-dominates-use requirement enforced. 124a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman DenseMap<const Value *, unsigned>::iterator I = FuncInfo.ValueMap.find(V); 125fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner if (I != FuncInfo.ValueMap.end()) 126fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner return I->second; 127fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner 128c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman unsigned Reg = LocalValueMap[V]; 129c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman if (Reg != 0) 130c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman return Reg; 131c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman 13297c94b8fc630b55e17a37481910810639e28d086Dan Gohman // In bottom-up mode, just create the virtual register which will be used 13397c94b8fc630b55e17a37481910810639e28d086Dan Gohman // to hold the value. It will be materialized later. 13484023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman if (isa<Instruction>(V) && 13584023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman (!isa<AllocaInst>(V) || 13684023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman !FuncInfo.StaticAllocaMap.count(cast<AllocaInst>(V)))) 13784023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman return FuncInfo.InitializeRegForValue(V); 13884023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 139a10b8494a50108482302f6f077d72fbc76d776edDan Gohman SavePoint SaveInsertPt = enterLocalValueArea(); 14084023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 14184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman // Materialize the value in a register. Emit any instructions in the 14284023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman // local value area. 14384023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman Reg = materializeRegForValue(V, VT); 14484023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 14584023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman leaveLocalValueArea(SaveInsertPt); 14697c94b8fc630b55e17a37481910810639e28d086Dan Gohman 14784023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman return Reg; 1481fdc614bee2a324fcc210d1e46d9b6fca3ca324bDan Gohman} 1491fdc614bee2a324fcc210d1e46d9b6fca3ca324bDan Gohman 15044a2c3476bd15e03f294bae1b50016851f214f8dEric Christopher/// materializeRegForValue - Helper for getRegForValue. This function is 1511fdc614bee2a324fcc210d1e46d9b6fca3ca324bDan Gohman/// called when the value isn't already available in a register and must 1521fdc614bee2a324fcc210d1e46d9b6fca3ca324bDan Gohman/// be materialized with new instructions. 1531fdc614bee2a324fcc210d1e46d9b6fca3ca324bDan Gohmanunsigned FastISel::materializeRegForValue(const Value *V, MVT VT) { 1541fdc614bee2a324fcc210d1e46d9b6fca3ca324bDan Gohman unsigned Reg = 0; 1551fdc614bee2a324fcc210d1e46d9b6fca3ca324bDan Gohman 15646510a73e977273ec67747eb34cbdb43f815e451Dan Gohman if (const ConstantInt *CI = dyn_cast<ConstantInt>(V)) { 1572ff7fd146159d97abe94391a33b4385abb06bbb0Dan Gohman if (CI->getValue().getActiveBits() <= 64) 1582ff7fd146159d97abe94391a33b4385abb06bbb0Dan Gohman Reg = FastEmit_i(VT, VT, ISD::Constant, CI->getZExtValue()); 1590586d91bb3e516d5826826522d9a90ed6ef74d86Dan Gohman } else if (isa<AllocaInst>(V)) { 1602ff7fd146159d97abe94391a33b4385abb06bbb0Dan Gohman Reg = TargetMaterializeAlloca(cast<AllocaInst>(V)); 161205d92589bc8c59d4bba9ddf89e0eb3c4d548cdaDan Gohman } else if (isa<ConstantPointerNull>(V)) { 1621e9e8c3bd5ac018296bddb21a2acb8c643303b39Dan Gohman // Translate this as an integer zero so that it can be 1631e9e8c3bd5ac018296bddb21a2acb8c643303b39Dan Gohman // local-CSE'd with actual integer zeros. 1641d0be15f89cb5056e20e2d24faa8d6afb1573bcaOwen Anderson Reg = 1651d0be15f89cb5056e20e2d24faa8d6afb1573bcaOwen Anderson getRegForValue(Constant::getNullValue(TD.getIntPtrType(V->getContext()))); 16646510a73e977273ec67747eb34cbdb43f815e451Dan Gohman } else if (const ConstantFP *CF = dyn_cast<ConstantFP>(V)) { 167bd1253809bc1b2455793a64d2801db3d6317b08eEli Friedman if (CF->isNullValue()) { 1682790ba8e5a7bb6e00fdac9997d840598fb60271cEli Friedman Reg = TargetMaterializeFloatZero(CF); 1692790ba8e5a7bb6e00fdac9997d840598fb60271cEli Friedman } else { 1702790ba8e5a7bb6e00fdac9997d840598fb60271cEli Friedman // Try to emit the constant directly. 1712790ba8e5a7bb6e00fdac9997d840598fb60271cEli Friedman Reg = FastEmit_f(VT, VT, ISD::ConstantFP, CF); 1722790ba8e5a7bb6e00fdac9997d840598fb60271cEli Friedman } 173ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman 174ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman if (!Reg) { 1754183e31978146ea529a87a2fc47b96aeb6cbe000Dan Gohman // Try to emit the constant by using an integer constant with a cast. 176ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman const APFloat &Flt = CF->getValueAPF(); 177e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT IntVT = TLI.getPointerTy(); 178ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman 179ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman uint64_t x[2]; 180ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman uint32_t IntBitWidth = IntVT.getSizeInBits(); 18123a98551ab65eeb8fe5019df8b7db4891582a4bdDale Johannesen bool isExact; 18223a98551ab65eeb8fe5019df8b7db4891582a4bdDale Johannesen (void) Flt.convertToInteger(x, IntBitWidth, /*isSigned=*/true, 18323a98551ab65eeb8fe5019df8b7db4891582a4bdDale Johannesen APFloat::rmTowardZero, &isExact); 18423a98551ab65eeb8fe5019df8b7db4891582a4bdDale Johannesen if (isExact) { 1852ff7fd146159d97abe94391a33b4385abb06bbb0Dan Gohman APInt IntVal(IntBitWidth, 2, x); 186ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman 187e922c0201916e0b980ab3cfe91e1413e68d55647Owen Anderson unsigned IntegerReg = 188eed707b1e6097aac2bb6b3d47271f6300ace7f2eOwen Anderson getRegForValue(ConstantInt::get(V->getContext(), IntVal)); 1892ff7fd146159d97abe94391a33b4385abb06bbb0Dan Gohman if (IntegerReg != 0) 190a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman Reg = FastEmit_r(IntVT.getSimpleVT(), VT, ISD::SINT_TO_FP, 191a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IntegerReg, /*Kill=*/false); 1922ff7fd146159d97abe94391a33b4385abb06bbb0Dan Gohman } 193ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman } 19446510a73e977273ec67747eb34cbdb43f815e451Dan Gohman } else if (const Operator *Op = dyn_cast<Operator>(V)) { 19520d4be151b54feb18aa1e5cc04033a4aa64137aeDan Gohman if (!SelectOperator(Op, Op->getOpcode())) 19620d4be151b54feb18aa1e5cc04033a4aa64137aeDan Gohman if (!isa<Instruction>(Op) || 19720d4be151b54feb18aa1e5cc04033a4aa64137aeDan Gohman !TargetSelectInstruction(cast<Instruction>(Op))) 19820d4be151b54feb18aa1e5cc04033a4aa64137aeDan Gohman return 0; 19937db6cdaea47d0637bdbe624f7b10ff8f82928adDan Gohman Reg = lookUpRegForValue(Op); 200205d92589bc8c59d4bba9ddf89e0eb3c4d548cdaDan Gohman } else if (isa<UndefValue>(V)) { 201104e4ce1629ea84736691bd1ee7867bdf90e8a2eDan Gohman Reg = createResultReg(TLI.getRegClassFor(VT)); 20284023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, 20384023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman TII.get(TargetOpcode::IMPLICIT_DEF), Reg); 204ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman } 205bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 206dceffe66b9e73ce372ea11c0fc6975504eb8c31dDan Gohman // If target-independent code couldn't handle the value, give target-specific 207dceffe66b9e73ce372ea11c0fc6975504eb8c31dDan Gohman // code a try. 2086e6074508c2f781c3e52dfe0e301cb1c7f395a91Owen Anderson if (!Reg && isa<Constant>(V)) 2092ff7fd146159d97abe94391a33b4385abb06bbb0Dan Gohman Reg = TargetMaterializeConstant(cast<Constant>(V)); 210bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 2112ff7fd146159d97abe94391a33b4385abb06bbb0Dan Gohman // Don't cache constant materializations in the general ValueMap. 2122ff7fd146159d97abe94391a33b4385abb06bbb0Dan Gohman // To do so would require tracking what uses they dominate. 21384023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman if (Reg != 0) { 214dceffe66b9e73ce372ea11c0fc6975504eb8c31dDan Gohman LocalValueMap[V] = Reg; 21584023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman LastLocalValue = MRI.getVRegDef(Reg); 21684023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman } 217104e4ce1629ea84736691bd1ee7867bdf90e8a2eDan Gohman return Reg; 218ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman} 219ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman 22046510a73e977273ec67747eb34cbdb43f815e451Dan Gohmanunsigned FastISel::lookUpRegForValue(const Value *V) { 22159fbc80f6b3b5c71dfb84149f589625f7ed510e3Evan Cheng // Look up the value to see if we already have a register for it. We 22259fbc80f6b3b5c71dfb84149f589625f7ed510e3Evan Cheng // cache values defined by Instructions across blocks, and other values 22359fbc80f6b3b5c71dfb84149f589625f7ed510e3Evan Cheng // only locally. This is because Instructions already have the SSA 2241fdc614bee2a324fcc210d1e46d9b6fca3ca324bDan Gohman // def-dominates-use requirement enforced. 225a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman DenseMap<const Value *, unsigned>::iterator I = FuncInfo.ValueMap.find(V); 226a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman if (I != FuncInfo.ValueMap.end()) 2273193a689db3de8640d412ccd9482301647359a4eDan Gohman return I->second; 22859fbc80f6b3b5c71dfb84149f589625f7ed510e3Evan Cheng return LocalValueMap[V]; 22959fbc80f6b3b5c71dfb84149f589625f7ed510e3Evan Cheng} 23059fbc80f6b3b5c71dfb84149f589625f7ed510e3Evan Cheng 231cc54e76cc67bbc9badc024ab29053602769bd255Owen Anderson/// UpdateValueMap - Update the value map to include the new mapping for this 232cc54e76cc67bbc9badc024ab29053602769bd255Owen Anderson/// instruction, or insert an extra copy to get the result in a previous 233cc54e76cc67bbc9badc024ab29053602769bd255Owen Anderson/// determined register. 234cc54e76cc67bbc9badc024ab29053602769bd255Owen Anderson/// NOTE: This is only necessary because we might select a block that uses 235cc54e76cc67bbc9badc024ab29053602769bd255Owen Anderson/// a value before we select the block that defines the value. It might be 236cc54e76cc67bbc9badc024ab29053602769bd255Owen Anderson/// possible to fix this by selecting blocks in reverse postorder. 23746510a73e977273ec67747eb34cbdb43f815e451Dan Gohmanunsigned FastISel::UpdateValueMap(const Value *I, unsigned Reg) { 23840b189e4e257924d90aaf63bf2e12bc7bbca961aDan Gohman if (!isa<Instruction>(I)) { 23940b189e4e257924d90aaf63bf2e12bc7bbca961aDan Gohman LocalValueMap[I] = Reg; 240c5040ab6065d5c569a1af0848b6e672b22b174b7Chris Lattner return Reg; 241c5040ab6065d5c569a1af0848b6e672b22b174b7Chris Lattner } 242bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 243a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman unsigned &AssignedReg = FuncInfo.ValueMap[I]; 244c5040ab6065d5c569a1af0848b6e672b22b174b7Chris Lattner if (AssignedReg == 0) 24584023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman // Use the new register. 246c5040ab6065d5c569a1af0848b6e672b22b174b7Chris Lattner AssignedReg = Reg; 24736e3946ac2f30a0bda66538ef2b974b1c8fbdc97Chris Lattner else if (Reg != AssignedReg) { 24884023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman // Arrange for uses of AssignedReg to be replaced by uses of Reg. 24984023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman FuncInfo.RegFixups[AssignedReg] = Reg; 25084023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 25184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman AssignedReg = Reg; 25240b189e4e257924d90aaf63bf2e12bc7bbca961aDan Gohman } 25384023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 254c5040ab6065d5c569a1af0848b6e672b22b174b7Chris Lattner return AssignedReg; 255cc54e76cc67bbc9badc024ab29053602769bd255Owen Anderson} 256cc54e76cc67bbc9badc024ab29053602769bd255Owen Anderson 257a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohmanstd::pair<unsigned, bool> FastISel::getRegForGEPIndex(const Value *Idx) { 258c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman unsigned IdxN = getRegForValue(Idx); 259c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman if (IdxN == 0) 260c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman // Unhandled operand. Halt "fast" selection and bail. 261a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman return std::pair<unsigned, bool>(0, false); 262a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman 263a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman bool IdxNIsKill = hasTrivialKill(Idx); 264c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman 265c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman // If the index is smaller or larger than intptr_t, truncate or extend it. 266766b5efd99c01e26f00f22d81b57d1385b3d2ab0Owen Anderson MVT PtrVT = TLI.getPointerTy(); 267e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT IdxVT = EVT::getEVT(Idx->getType(), /*HandleUnknown=*/false); 268a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman if (IdxVT.bitsLT(PtrVT)) { 269a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IdxN = FastEmit_r(IdxVT.getSimpleVT(), PtrVT, ISD::SIGN_EXTEND, 270a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IdxN, IdxNIsKill); 271a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IdxNIsKill = true; 272a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman } 273a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman else if (IdxVT.bitsGT(PtrVT)) { 274a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IdxN = FastEmit_r(IdxVT.getSimpleVT(), PtrVT, ISD::TRUNCATE, 275a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IdxN, IdxNIsKill); 276a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IdxNIsKill = true; 277a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman } 278a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman return std::pair<unsigned, bool>(IdxN, IdxNIsKill); 279c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman} 280c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman 28184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohmanvoid FastISel::recomputeInsertPt() { 28284023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman if (getLastLocalValue()) { 28384023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman FuncInfo.InsertPt = getLastLocalValue(); 284c6e59b71f50c7c77bc448a936dba8e84d90911e8Dan Gohman FuncInfo.MBB = FuncInfo.InsertPt->getParent(); 28584023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman ++FuncInfo.InsertPt; 28684023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman } else 28784023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman FuncInfo.InsertPt = FuncInfo.MBB->getFirstNonPHI(); 28884023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 28984023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman // Now skip past any EH_LABELs, which must remain at the beginning. 29084023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman while (FuncInfo.InsertPt != FuncInfo.MBB->end() && 29184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman FuncInfo.InsertPt->getOpcode() == TargetOpcode::EH_LABEL) 29284023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman ++FuncInfo.InsertPt; 29384023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman} 29484023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 295a10b8494a50108482302f6f077d72fbc76d776edDan GohmanFastISel::SavePoint FastISel::enterLocalValueArea() { 29684023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman MachineBasicBlock::iterator OldInsertPt = FuncInfo.InsertPt; 297163f78ea4016d594d921154d8df1c9d746fb0ea8Dan Gohman DebugLoc OldDL = DL; 29884023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman recomputeInsertPt(); 299a10b8494a50108482302f6f077d72fbc76d776edDan Gohman DL = DebugLoc(); 300163f78ea4016d594d921154d8df1c9d746fb0ea8Dan Gohman SavePoint SP = { OldInsertPt, OldDL }; 301a10b8494a50108482302f6f077d72fbc76d776edDan Gohman return SP; 30284023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman} 30384023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 304a10b8494a50108482302f6f077d72fbc76d776edDan Gohmanvoid FastISel::leaveLocalValueArea(SavePoint OldInsertPt) { 30584023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman if (FuncInfo.InsertPt != FuncInfo.MBB->begin()) 30684023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman LastLocalValue = llvm::prior(FuncInfo.InsertPt); 30784023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 30884023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman // Restore the previous insert position. 309a10b8494a50108482302f6f077d72fbc76d776edDan Gohman FuncInfo.InsertPt = OldInsertPt.InsertPt; 310a10b8494a50108482302f6f077d72fbc76d776edDan Gohman DL = OldInsertPt.DL; 31184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman} 31284023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 313bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman/// SelectBinaryOp - Select and emit code for a binary operator instruction, 314bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman/// which has an opcode which directly corresponds to the given ISD opcode. 315bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman/// 31646510a73e977273ec67747eb34cbdb43f815e451Dan Gohmanbool FastISel::SelectBinaryOp(const User *I, unsigned ISDOpcode) { 317e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT VT = EVT::getEVT(I->getType(), /*HandleUnknown=*/true); 318825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson if (VT == MVT::Other || !VT.isSimple()) 319d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman // Unhandled type. Halt "fast" selection and bail. 320d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman return false; 321638c6830c6d0d6871065d2b00178ee4aa7d4d044Dan Gohman 322b71fea248fd7cf9ab2c5737997a3dc5682948dc4Dan Gohman // We only handle legal types. For example, on x86-32 the instruction 323b71fea248fd7cf9ab2c5737997a3dc5682948dc4Dan Gohman // selector contains all of the 64-bit instructions from x86-64, 324b71fea248fd7cf9ab2c5737997a3dc5682948dc4Dan Gohman // under the assumption that i64 won't be used if the target doesn't 325b71fea248fd7cf9ab2c5737997a3dc5682948dc4Dan Gohman // support it. 326638c6830c6d0d6871065d2b00178ee4aa7d4d044Dan Gohman if (!TLI.isTypeLegal(VT)) { 327825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson // MVT::i1 is special. Allow AND, OR, or XOR because they 328638c6830c6d0d6871065d2b00178ee4aa7d4d044Dan Gohman // don't require additional zeroing, which makes them easy. 329825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson if (VT == MVT::i1 && 3305dd9c2e9aea7294c184609aff7f2fe82eaea4eb0Dan Gohman (ISDOpcode == ISD::AND || ISDOpcode == ISD::OR || 3315dd9c2e9aea7294c184609aff7f2fe82eaea4eb0Dan Gohman ISDOpcode == ISD::XOR)) 33223b9b19b1a5a00faa9fce0788155c7dbfd00bfb1Owen Anderson VT = TLI.getTypeToTransformTo(I->getContext(), VT); 333638c6830c6d0d6871065d2b00178ee4aa7d4d044Dan Gohman else 334638c6830c6d0d6871065d2b00178ee4aa7d4d044Dan Gohman return false; 335638c6830c6d0d6871065d2b00178ee4aa7d4d044Dan Gohman } 336d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman 337fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner // Check if the first operand is a constant, and handle it as "ri". At -O0, 338fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner // we don't have anything that canonicalizes operand order. 339fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner if (ConstantInt *CI = dyn_cast<ConstantInt>(I->getOperand(0))) 340fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner if (isa<Instruction>(I) && cast<Instruction>(I)->isCommutative()) { 341fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner unsigned Op1 = getRegForValue(I->getOperand(1)); 342fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner if (Op1 == 0) return false; 343fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner 344fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner bool Op1IsKill = hasTrivialKill(I->getOperand(1)); 345d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 346602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner unsigned ResultReg = FastEmit_ri_(VT.getSimpleVT(), ISDOpcode, Op1, 347602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner Op1IsKill, CI->getZExtValue(), 348602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner VT.getSimpleVT()); 349602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner if (ResultReg == 0) return false; 350d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 351602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner // We successfully emitted code for the given LLVM Instruction. 352602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner UpdateValueMap(I, ResultReg); 353602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner return true; 354fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner } 355d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 356d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 3573df24e667f04a7003342b534310919abc9c87418Dan Gohman unsigned Op0 = getRegForValue(I->getOperand(0)); 358602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner if (Op0 == 0) // Unhandled operand. Halt "fast" selection and bail. 359a7f2dff98e68ed8b2ac32f953768c04f26b52beaDan Gohman return false; 360a7f2dff98e68ed8b2ac32f953768c04f26b52beaDan Gohman 361a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman bool Op0IsKill = hasTrivialKill(I->getOperand(0)); 362a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman 363d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman // Check if the second operand is a constant and handle it appropriately. 364d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman if (ConstantInt *CI = dyn_cast<ConstantInt>(I->getOperand(1))) { 365602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner uint64_t Imm = CI->getZExtValue(); 366d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 367f051c1a29dd040b4b5ca0c5696d47a9058f87481Chris Lattner // Transform "sdiv exact X, 8" -> "sra X, 3". 368f051c1a29dd040b4b5ca0c5696d47a9058f87481Chris Lattner if (ISDOpcode == ISD::SDIV && isa<BinaryOperator>(I) && 369f051c1a29dd040b4b5ca0c5696d47a9058f87481Chris Lattner cast<BinaryOperator>(I)->isExact() && 370f051c1a29dd040b4b5ca0c5696d47a9058f87481Chris Lattner isPowerOf2_64(Imm)) { 371f051c1a29dd040b4b5ca0c5696d47a9058f87481Chris Lattner Imm = Log2_64(Imm); 372f051c1a29dd040b4b5ca0c5696d47a9058f87481Chris Lattner ISDOpcode = ISD::SRA; 373f051c1a29dd040b4b5ca0c5696d47a9058f87481Chris Lattner } 374d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 375602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner unsigned ResultReg = FastEmit_ri_(VT.getSimpleVT(), ISDOpcode, Op0, 376602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner Op0IsKill, Imm, VT.getSimpleVT()); 377602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner if (ResultReg == 0) return false; 378d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 379602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner // We successfully emitted code for the given LLVM Instruction. 380602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner UpdateValueMap(I, ResultReg); 381602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner return true; 382d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman } 383d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman 38410df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman // Check if the second operand is a constant float. 38510df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman if (ConstantFP *CF = dyn_cast<ConstantFP>(I->getOperand(1))) { 386ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman unsigned ResultReg = FastEmit_rf(VT.getSimpleVT(), VT.getSimpleVT(), 387a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman ISDOpcode, Op0, Op0IsKill, CF); 388ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman if (ResultReg != 0) { 389ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman // We successfully emitted code for the given LLVM Instruction. 3903df24e667f04a7003342b534310919abc9c87418Dan Gohman UpdateValueMap(I, ResultReg); 391ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman return true; 392ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman } 39310df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman } 39410df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman 3953df24e667f04a7003342b534310919abc9c87418Dan Gohman unsigned Op1 = getRegForValue(I->getOperand(1)); 396d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman if (Op1 == 0) 397d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman // Unhandled operand. Halt "fast" selection and bail. 398bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman return false; 399bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman 400a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman bool Op1IsKill = hasTrivialKill(I->getOperand(1)); 401a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman 402ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman // Now we have both operands in registers. Emit the instruction. 4030f84e4e31009eecf2dfcbe6113b65d0919f30254Owen Anderson unsigned ResultReg = FastEmit_rr(VT.getSimpleVT(), VT.getSimpleVT(), 404a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman ISDOpcode, 405a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman Op0, Op0IsKill, 406a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman Op1, Op1IsKill); 407bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman if (ResultReg == 0) 408bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman // Target-specific code wasn't able to find a machine opcode for 409bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman // the given ISD opcode and type. Halt "fast" selection and bail. 410bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman return false; 411bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman 4128014e865800cc911697a4c0c42f077df9fcc9805Dan Gohman // We successfully emitted code for the given LLVM Instruction. 4133df24e667f04a7003342b534310919abc9c87418Dan Gohman UpdateValueMap(I, ResultReg); 414bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman return true; 415bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman} 416bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman 41746510a73e977273ec67747eb34cbdb43f815e451Dan Gohmanbool FastISel::SelectGetElementPtr(const User *I) { 4183df24e667f04a7003342b534310919abc9c87418Dan Gohman unsigned N = getRegForValue(I->getOperand(0)); 41983785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng if (N == 0) 42083785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // Unhandled operand. Halt "fast" selection and bail. 42183785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng return false; 42283785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng 423a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman bool NIsKill = hasTrivialKill(I->getOperand(0)); 424a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman 42583785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng const Type *Ty = I->getOperand(0)->getType(); 426825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson MVT VT = TLI.getPointerTy(); 42746510a73e977273ec67747eb34cbdb43f815e451Dan Gohman for (GetElementPtrInst::const_op_iterator OI = I->op_begin()+1, 42846510a73e977273ec67747eb34cbdb43f815e451Dan Gohman E = I->op_end(); OI != E; ++OI) { 42946510a73e977273ec67747eb34cbdb43f815e451Dan Gohman const Value *Idx = *OI; 43083785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng if (const StructType *StTy = dyn_cast<StructType>(Ty)) { 43183785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng unsigned Field = cast<ConstantInt>(Idx)->getZExtValue(); 43283785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng if (Field) { 43383785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // N = N + Offset 43483785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng uint64_t Offs = TD.getStructLayout(StTy)->getElementOffset(Field); 43583785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // FIXME: This can be optimized by combining the add with a 43683785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // subsequent one. 437a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman N = FastEmit_ri_(VT, ISD::ADD, N, NIsKill, Offs, VT); 43883785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng if (N == 0) 43983785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // Unhandled operand. Halt "fast" selection and bail. 44083785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng return false; 441a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman NIsKill = true; 44283785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng } 44383785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng Ty = StTy->getElementType(Field); 44483785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng } else { 44583785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng Ty = cast<SequentialType>(Ty)->getElementType(); 44683785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng 44783785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // If this is a constant subscript, handle it quickly. 44846510a73e977273ec67747eb34cbdb43f815e451Dan Gohman if (const ConstantInt *CI = dyn_cast<ConstantInt>(Idx)) { 449e368b460a206fafa0d31d5d059b1779b94f7df8cDan Gohman if (CI->isZero()) continue; 450bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck uint64_t Offs = 451777d2306b36816a53bc1ae1244c0dc7d998ae691Duncan Sands TD.getTypeAllocSize(Ty)*cast<ConstantInt>(CI)->getSExtValue(); 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 continue; 45883785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng } 459bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 46083785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // N = N + Idx * ElementSize; 461777d2306b36816a53bc1ae1244c0dc7d998ae691Duncan Sands uint64_t ElementSize = TD.getTypeAllocSize(Ty); 462a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman std::pair<unsigned, bool> Pair = getRegForGEPIndex(Idx); 463a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned IdxN = Pair.first; 464a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman bool IdxNIsKill = Pair.second; 46583785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng if (IdxN == 0) 46683785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // Unhandled operand. Halt "fast" selection and bail. 46783785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng return false; 46883785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng 46980bc6e2243b7ae99da42bf2e61df4ebccf8d8821Dan Gohman if (ElementSize != 1) { 470a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IdxN = FastEmit_ri_(VT, ISD::MUL, IdxN, IdxNIsKill, ElementSize, VT); 47180bc6e2243b7ae99da42bf2e61df4ebccf8d8821Dan Gohman if (IdxN == 0) 47280bc6e2243b7ae99da42bf2e61df4ebccf8d8821Dan Gohman // Unhandled operand. Halt "fast" selection and bail. 47380bc6e2243b7ae99da42bf2e61df4ebccf8d8821Dan Gohman return false; 474a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IdxNIsKill = true; 47580bc6e2243b7ae99da42bf2e61df4ebccf8d8821Dan Gohman } 476a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman N = FastEmit_rr(VT, VT, ISD::ADD, N, NIsKill, IdxN, IdxNIsKill); 47783785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng if (N == 0) 47883785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // Unhandled operand. Halt "fast" selection and bail. 47983785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng return false; 48083785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng } 48183785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng } 48283785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng 48383785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // We successfully emitted code for the given LLVM Instruction. 4843df24e667f04a7003342b534310919abc9c87418Dan Gohman UpdateValueMap(I, N); 48583785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng return true; 486bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman} 487bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman 48846510a73e977273ec67747eb34cbdb43f815e451Dan Gohmanbool FastISel::SelectCall(const User *I) { 489a61e73bda5125c28e48b52e573d115370838596bDan Gohman const CallInst *Call = cast<CallInst>(I); 490a61e73bda5125c28e48b52e573d115370838596bDan Gohman 491a61e73bda5125c28e48b52e573d115370838596bDan Gohman // Handle simple inline asms. 492a61e73bda5125c28e48b52e573d115370838596bDan Gohman if (const InlineAsm *IA = dyn_cast<InlineAsm>(Call->getArgOperand(0))) { 493a61e73bda5125c28e48b52e573d115370838596bDan Gohman // Don't attempt to handle constraints. 494a61e73bda5125c28e48b52e573d115370838596bDan Gohman if (!IA->getConstraintString().empty()) 495a61e73bda5125c28e48b52e573d115370838596bDan Gohman return false; 496a61e73bda5125c28e48b52e573d115370838596bDan Gohman 497a61e73bda5125c28e48b52e573d115370838596bDan Gohman unsigned ExtraInfo = 0; 498a61e73bda5125c28e48b52e573d115370838596bDan Gohman if (IA->hasSideEffects()) 499a61e73bda5125c28e48b52e573d115370838596bDan Gohman ExtraInfo |= InlineAsm::Extra_HasSideEffects; 500a61e73bda5125c28e48b52e573d115370838596bDan Gohman if (IA->isAlignStack()) 501a61e73bda5125c28e48b52e573d115370838596bDan Gohman ExtraInfo |= InlineAsm::Extra_IsAlignStack; 502a61e73bda5125c28e48b52e573d115370838596bDan Gohman 503a61e73bda5125c28e48b52e573d115370838596bDan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, 504a61e73bda5125c28e48b52e573d115370838596bDan Gohman TII.get(TargetOpcode::INLINEASM)) 505a61e73bda5125c28e48b52e573d115370838596bDan Gohman .addExternalSymbol(IA->getAsmString().c_str()) 506a61e73bda5125c28e48b52e573d115370838596bDan Gohman .addImm(ExtraInfo); 507a61e73bda5125c28e48b52e573d115370838596bDan Gohman return true; 508a61e73bda5125c28e48b52e573d115370838596bDan Gohman } 509a61e73bda5125c28e48b52e573d115370838596bDan Gohman 510a61e73bda5125c28e48b52e573d115370838596bDan Gohman const Function *F = Call->getCalledFunction(); 51133134c4a75558288d663267c8991f6bd37a530afDan Gohman if (!F) return false; 51233134c4a75558288d663267c8991f6bd37a530afDan Gohman 5134183e31978146ea529a87a2fc47b96aeb6cbe000Dan Gohman // Handle selected intrinsic function calls. 514832e4943598d821687cec79f512803c1ca03cff7Chris Lattner switch (F->getIntrinsicID()) { 51533134c4a75558288d663267c8991f6bd37a530afDan Gohman default: break; 51692c1e126473dfa93eeb4c9a124af4fedb40f0d5bBill Wendling case Intrinsic::dbg_declare: { 517a61e73bda5125c28e48b52e573d115370838596bDan Gohman const DbgDeclareInst *DI = cast<DbgDeclareInst>(Call); 51802f0dbd97a9bc01528aa12c2f260d928683ab411Devang Patel if (!DIVariable(DI->getVariable()).Verify() || 519a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman !FuncInfo.MF->getMMI().hasDebugInfo()) 5207e1e31f467d87c834d8baf673929865907901313Devang Patel return true; 52192c1e126473dfa93eeb4c9a124af4fedb40f0d5bBill Wendling 52246510a73e977273ec67747eb34cbdb43f815e451Dan Gohman const Value *Address = DI->getAddress(); 5236fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel if (!Address || isa<UndefValue>(Address) || isa<AllocaInst>(Address)) 524dc9185657593b5c1db86cb95a04a68fc09194993Dale Johannesen return true; 5256fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel 5266fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel unsigned Reg = 0; 5276fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel unsigned Offset = 0; 5286fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel if (const Argument *Arg = dyn_cast<Argument>(Address)) { 5296fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel if (Arg->hasByValAttr()) { 5306fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel // Byval arguments' frame index is recorded during argument lowering. 5316fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel // Use this info directly. 5326fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel Offset = FuncInfo.getByValArgumentFrameIndex(Arg); 5336fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel if (Offset) 5346fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel Reg = TRI.getFrameRegister(*FuncInfo.MF); 535bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck } 5364bafda9618f9dfa9edc8da08bb3001ef2d1a9b68Devang Patel } 5376fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel if (!Reg) 5386fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel Reg = getRegForValue(Address); 539bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 5406fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel if (Reg) 541bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, 5426fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel TII.get(TargetOpcode::DBG_VALUE)) 5436fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel .addReg(Reg, RegState::Debug).addImm(Offset) 5446fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel .addMetadata(DI->getVariable()); 54533134c4a75558288d663267c8991f6bd37a530afDan Gohman return true; 54692c1e126473dfa93eeb4c9a124af4fedb40f0d5bBill Wendling } 54745df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen case Intrinsic::dbg_value: { 548343b42e428079363ab09828734b2debfd7dbdc9eDale Johannesen // This form of DBG_VALUE is target-independent. 549a61e73bda5125c28e48b52e573d115370838596bDan Gohman const DbgValueInst *DI = cast<DbgValueInst>(Call); 55045df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen const TargetInstrDesc &II = TII.get(TargetOpcode::DBG_VALUE); 55146510a73e977273ec67747eb34cbdb43f815e451Dan Gohman const Value *V = DI->getValue(); 55245df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen if (!V) { 55345df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen // Currently the optimizer can produce this; insert an undef to 55445df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen // help debugging. Probably the optimizer should not do this. 55584023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 55684023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman .addReg(0U).addImm(DI->getOffset()) 55784023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman .addMetadata(DI->getVariable()); 55846510a73e977273ec67747eb34cbdb43f815e451Dan Gohman } else if (const ConstantInt *CI = dyn_cast<ConstantInt>(V)) { 55984023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 56084023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman .addImm(CI->getZExtValue()).addImm(DI->getOffset()) 56184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman .addMetadata(DI->getVariable()); 56246510a73e977273ec67747eb34cbdb43f815e451Dan Gohman } else if (const ConstantFP *CF = dyn_cast<ConstantFP>(V)) { 56384023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 56484023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman .addFPImm(CF).addImm(DI->getOffset()) 56584023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman .addMetadata(DI->getVariable()); 56645df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen } else if (unsigned Reg = lookUpRegForValue(V)) { 56784023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 56884023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman .addReg(Reg, RegState::Debug).addImm(DI->getOffset()) 56984023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman .addMetadata(DI->getVariable()); 57045df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen } else { 57145df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen // We can't yet handle anything else here because it would require 57245df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen // generating code, thus altering codegen because of debug info. 573afeaae7a940ce16e7874af31f3e5e91d8ca89e19Devang Patel DEBUG(dbgs() << "Dropping debug info for " << DI); 574bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck } 57545df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen return true; 57645df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen } 577dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman case Intrinsic::eh_exception: { 578a61e73bda5125c28e48b52e573d115370838596bDan Gohman EVT VT = TLI.getValueType(Call->getType()); 579832e4943598d821687cec79f512803c1ca03cff7Chris Lattner if (TLI.getOperationAction(ISD::EXCEPTIONADDR, VT)!=TargetLowering::Expand) 580832e4943598d821687cec79f512803c1ca03cff7Chris Lattner break; 581d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 582832e4943598d821687cec79f512803c1ca03cff7Chris Lattner assert(FuncInfo.MBB->isLandingPad() && 583832e4943598d821687cec79f512803c1ca03cff7Chris Lattner "Call to eh.exception not in landing pad!"); 584832e4943598d821687cec79f512803c1ca03cff7Chris Lattner unsigned Reg = TLI.getExceptionAddressRegister(); 585832e4943598d821687cec79f512803c1ca03cff7Chris Lattner const TargetRegisterClass *RC = TLI.getRegClassFor(VT); 586832e4943598d821687cec79f512803c1ca03cff7Chris Lattner unsigned ResultReg = createResultReg(RC); 587832e4943598d821687cec79f512803c1ca03cff7Chris Lattner BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 588832e4943598d821687cec79f512803c1ca03cff7Chris Lattner ResultReg).addReg(Reg); 589a61e73bda5125c28e48b52e573d115370838596bDan Gohman UpdateValueMap(Call, ResultReg); 590832e4943598d821687cec79f512803c1ca03cff7Chris Lattner return true; 591dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman } 592b01bbdcc1af27bd90b552bb1b62b48916e0d4be3Duncan Sands case Intrinsic::eh_selector: { 593a61e73bda5125c28e48b52e573d115370838596bDan Gohman EVT VT = TLI.getValueType(Call->getType()); 594832e4943598d821687cec79f512803c1ca03cff7Chris Lattner if (TLI.getOperationAction(ISD::EHSELECTION, VT) != TargetLowering::Expand) 595832e4943598d821687cec79f512803c1ca03cff7Chris Lattner break; 596832e4943598d821687cec79f512803c1ca03cff7Chris Lattner if (FuncInfo.MBB->isLandingPad()) 597a61e73bda5125c28e48b52e573d115370838596bDan Gohman AddCatchInfo(*Call, &FuncInfo.MF->getMMI(), FuncInfo.MBB); 598832e4943598d821687cec79f512803c1ca03cff7Chris Lattner else { 599dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman#ifndef NDEBUG 600a61e73bda5125c28e48b52e573d115370838596bDan Gohman FuncInfo.CatchInfoLost.insert(Call); 601dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman#endif 602832e4943598d821687cec79f512803c1ca03cff7Chris Lattner // FIXME: Mark exception selector register as live in. Hack for PR1508. 603ed3a8067a60ecf2c215e77327a57904c3ebc3355Chris Lattner unsigned Reg = TLI.getExceptionSelectorRegister(); 604832e4943598d821687cec79f512803c1ca03cff7Chris Lattner if (Reg) FuncInfo.MBB->addLiveIn(Reg); 605832e4943598d821687cec79f512803c1ca03cff7Chris Lattner } 606ed3a8067a60ecf2c215e77327a57904c3ebc3355Chris Lattner 607832e4943598d821687cec79f512803c1ca03cff7Chris Lattner unsigned Reg = TLI.getExceptionSelectorRegister(); 608832e4943598d821687cec79f512803c1ca03cff7Chris Lattner EVT SrcVT = TLI.getPointerTy(); 609832e4943598d821687cec79f512803c1ca03cff7Chris Lattner const TargetRegisterClass *RC = TLI.getRegClassFor(SrcVT); 610832e4943598d821687cec79f512803c1ca03cff7Chris Lattner unsigned ResultReg = createResultReg(RC); 611832e4943598d821687cec79f512803c1ca03cff7Chris Lattner BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 612832e4943598d821687cec79f512803c1ca03cff7Chris Lattner ResultReg).addReg(Reg); 613832e4943598d821687cec79f512803c1ca03cff7Chris Lattner 614a61e73bda5125c28e48b52e573d115370838596bDan Gohman bool ResultRegIsKill = hasTrivialKill(Call); 615832e4943598d821687cec79f512803c1ca03cff7Chris Lattner 616832e4943598d821687cec79f512803c1ca03cff7Chris Lattner // Cast the register to the type of the selector. 617832e4943598d821687cec79f512803c1ca03cff7Chris Lattner if (SrcVT.bitsGT(MVT::i32)) 618832e4943598d821687cec79f512803c1ca03cff7Chris Lattner ResultReg = FastEmit_r(SrcVT.getSimpleVT(), MVT::i32, ISD::TRUNCATE, 619832e4943598d821687cec79f512803c1ca03cff7Chris Lattner ResultReg, ResultRegIsKill); 620832e4943598d821687cec79f512803c1ca03cff7Chris Lattner else if (SrcVT.bitsLT(MVT::i32)) 621832e4943598d821687cec79f512803c1ca03cff7Chris Lattner ResultReg = FastEmit_r(SrcVT.getSimpleVT(), MVT::i32, 622832e4943598d821687cec79f512803c1ca03cff7Chris Lattner ISD::SIGN_EXTEND, ResultReg, ResultRegIsKill); 623832e4943598d821687cec79f512803c1ca03cff7Chris Lattner if (ResultReg == 0) 624832e4943598d821687cec79f512803c1ca03cff7Chris Lattner // Unhandled operand. Halt "fast" selection and bail. 625832e4943598d821687cec79f512803c1ca03cff7Chris Lattner return false; 626ed3a8067a60ecf2c215e77327a57904c3ebc3355Chris Lattner 627a61e73bda5125c28e48b52e573d115370838596bDan Gohman UpdateValueMap(Call, ResultReg); 628832e4943598d821687cec79f512803c1ca03cff7Chris Lattner 629832e4943598d821687cec79f512803c1ca03cff7Chris Lattner return true; 630dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman } 63133134c4a75558288d663267c8991f6bd37a530afDan Gohman } 6324183e31978146ea529a87a2fc47b96aeb6cbe000Dan Gohman 6334183e31978146ea529a87a2fc47b96aeb6cbe000Dan Gohman // An arbitrary call. Bail. 63433134c4a75558288d663267c8991f6bd37a530afDan Gohman return false; 63533134c4a75558288d663267c8991f6bd37a530afDan Gohman} 63633134c4a75558288d663267c8991f6bd37a530afDan Gohman 63746510a73e977273ec67747eb34cbdb43f815e451Dan Gohmanbool FastISel::SelectCast(const User *I, unsigned Opcode) { 638e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT SrcVT = TLI.getValueType(I->getOperand(0)->getType()); 639e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT DstVT = TLI.getValueType(I->getType()); 640bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 641825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson if (SrcVT == MVT::Other || !SrcVT.isSimple() || 642825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson DstVT == MVT::Other || !DstVT.isSimple()) 643d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson // Unhandled type. Halt "fast" selection and bail. 644d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson return false; 645bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 646474d3b3f40e117a66946e9fb9d2016b4c05caef0Dan Gohman // Check if the destination type is legal. Or as a special case, 647474d3b3f40e117a66946e9fb9d2016b4c05caef0Dan Gohman // it may be i1 if we're doing a truncate because that's 648474d3b3f40e117a66946e9fb9d2016b4c05caef0Dan Gohman // easy and somewhat common. 649474d3b3f40e117a66946e9fb9d2016b4c05caef0Dan Gohman if (!TLI.isTypeLegal(DstVT)) 650825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson if (DstVT != MVT::i1 || Opcode != ISD::TRUNCATE) 651474d3b3f40e117a66946e9fb9d2016b4c05caef0Dan Gohman // Unhandled type. Halt "fast" selection and bail. 652474d3b3f40e117a66946e9fb9d2016b4c05caef0Dan Gohman return false; 653474d3b3f40e117a66946e9fb9d2016b4c05caef0Dan Gohman 65491b6f97ce4273fee5516692e3f27cd76d67986fcDan Gohman // Check if the source operand is legal. Or as a special case, 65591b6f97ce4273fee5516692e3f27cd76d67986fcDan Gohman // it may be i1 if we're doing zero-extension because that's 656474d3b3f40e117a66946e9fb9d2016b4c05caef0Dan Gohman // easy and somewhat common. 657474d3b3f40e117a66946e9fb9d2016b4c05caef0Dan Gohman if (!TLI.isTypeLegal(SrcVT)) 658825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson if (SrcVT != MVT::i1 || Opcode != ISD::ZERO_EXTEND) 65991b6f97ce4273fee5516692e3f27cd76d67986fcDan Gohman // Unhandled type. Halt "fast" selection and bail. 66091b6f97ce4273fee5516692e3f27cd76d67986fcDan Gohman return false; 661474d3b3f40e117a66946e9fb9d2016b4c05caef0Dan Gohman 6623df24e667f04a7003342b534310919abc9c87418Dan Gohman unsigned InputReg = getRegForValue(I->getOperand(0)); 663d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson if (!InputReg) 664d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson // Unhandled operand. Halt "fast" selection and bail. 665d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson return false; 66614ea1ec2324cb595f2e035bbf54ddcd483f17c11Dan Gohman 667a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman bool InputRegIsKill = hasTrivialKill(I->getOperand(0)); 668a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman 66914ea1ec2324cb595f2e035bbf54ddcd483f17c11Dan Gohman // If the operand is i1, arrange for the high bits in the register to be zero. 670825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson if (SrcVT == MVT::i1) { 67123b9b19b1a5a00faa9fce0788155c7dbfd00bfb1Owen Anderson SrcVT = TLI.getTypeToTransformTo(I->getContext(), SrcVT); 672a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman InputReg = FastEmitZExtFromI1(SrcVT.getSimpleVT(), InputReg, InputRegIsKill); 67314ea1ec2324cb595f2e035bbf54ddcd483f17c11Dan Gohman if (!InputReg) 67414ea1ec2324cb595f2e035bbf54ddcd483f17c11Dan Gohman return false; 675a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman InputRegIsKill = true; 67614ea1ec2324cb595f2e035bbf54ddcd483f17c11Dan Gohman } 677474d3b3f40e117a66946e9fb9d2016b4c05caef0Dan Gohman // If the result is i1, truncate to the target's type for i1 first. 678825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson if (DstVT == MVT::i1) 67923b9b19b1a5a00faa9fce0788155c7dbfd00bfb1Owen Anderson DstVT = TLI.getTypeToTransformTo(I->getContext(), DstVT); 68014ea1ec2324cb595f2e035bbf54ddcd483f17c11Dan Gohman 681d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson unsigned ResultReg = FastEmit_r(SrcVT.getSimpleVT(), 682d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson DstVT.getSimpleVT(), 683d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson Opcode, 684a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman InputReg, InputRegIsKill); 685d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson if (!ResultReg) 686d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson return false; 687bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 6883df24e667f04a7003342b534310919abc9c87418Dan Gohman UpdateValueMap(I, ResultReg); 689d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson return true; 690d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson} 691d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson 69246510a73e977273ec67747eb34cbdb43f815e451Dan Gohmanbool FastISel::SelectBitCast(const User *I) { 693ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman // If the bitcast doesn't change the type, just use the operand value. 694ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman if (I->getType() == I->getOperand(0)->getType()) { 6953df24e667f04a7003342b534310919abc9c87418Dan Gohman unsigned Reg = getRegForValue(I->getOperand(0)); 696a318dabc0edbcc7a2b54d99b026a093361ec14fcDan Gohman if (Reg == 0) 697a318dabc0edbcc7a2b54d99b026a093361ec14fcDan Gohman return false; 6983df24e667f04a7003342b534310919abc9c87418Dan Gohman UpdateValueMap(I, Reg); 699ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman return true; 700ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman } 701ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman 702bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck // Bitcasts of other values become reg-reg copies or BITCAST operators. 703e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT SrcVT = TLI.getValueType(I->getOperand(0)->getType()); 704e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT DstVT = TLI.getValueType(I->getType()); 705bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 706825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson if (SrcVT == MVT::Other || !SrcVT.isSimple() || 707825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson DstVT == MVT::Other || !DstVT.isSimple() || 708d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson !TLI.isTypeLegal(SrcVT) || !TLI.isTypeLegal(DstVT)) 709d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson // Unhandled type. Halt "fast" selection and bail. 710d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson return false; 711bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 7123df24e667f04a7003342b534310919abc9c87418Dan Gohman unsigned Op0 = getRegForValue(I->getOperand(0)); 713ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman if (Op0 == 0) 714ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman // Unhandled operand. Halt "fast" selection and bail. 715d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson return false; 716a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman 717a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman bool Op0IsKill = hasTrivialKill(I->getOperand(0)); 718bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 719ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman // First, try to perform the bitcast by inserting a reg-reg copy. 720ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman unsigned ResultReg = 0; 721ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman if (SrcVT.getSimpleVT() == DstVT.getSimpleVT()) { 722ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman TargetRegisterClass* SrcClass = TLI.getRegClassFor(SrcVT); 723ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman TargetRegisterClass* DstClass = TLI.getRegClassFor(DstVT); 724e7917bb207d5178dfb26066f839e4c295fd3a1ebJakob Stoklund Olesen // Don't attempt a cross-class copy. It will likely fail. 725e7917bb207d5178dfb26066f839e4c295fd3a1ebJakob Stoklund Olesen if (SrcClass == DstClass) { 726e7917bb207d5178dfb26066f839e4c295fd3a1ebJakob Stoklund Olesen ResultReg = createResultReg(DstClass); 727e7917bb207d5178dfb26066f839e4c295fd3a1ebJakob Stoklund Olesen BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 728e7917bb207d5178dfb26066f839e4c295fd3a1ebJakob Stoklund Olesen ResultReg).addReg(Op0); 729e7917bb207d5178dfb26066f839e4c295fd3a1ebJakob Stoklund Olesen } 730ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman } 731bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 732bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck // If the reg-reg copy failed, select a BITCAST opcode. 733ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman if (!ResultReg) 734ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman ResultReg = FastEmit_r(SrcVT.getSimpleVT(), DstVT.getSimpleVT(), 735bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck ISD::BITCAST, Op0, Op0IsKill); 736bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 737ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman if (!ResultReg) 738d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson return false; 739bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 7403df24e667f04a7003342b534310919abc9c87418Dan Gohman UpdateValueMap(I, ResultReg); 741d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson return true; 742d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson} 743d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson 7443df24e667f04a7003342b534310919abc9c87418Dan Gohmanbool 74546510a73e977273ec67747eb34cbdb43f815e451Dan GohmanFastISel::SelectInstruction(const Instruction *I) { 746e8c92dd439581bec7e3516cbdbea74e2e60fe7f0Dan Gohman // Just before the terminator instruction, insert instructions to 747e8c92dd439581bec7e3516cbdbea74e2e60fe7f0Dan Gohman // feed PHI nodes in successor blocks. 748e8c92dd439581bec7e3516cbdbea74e2e60fe7f0Dan Gohman if (isa<TerminatorInst>(I)) 749e8c92dd439581bec7e3516cbdbea74e2e60fe7f0Dan Gohman if (!HandlePHINodesInSuccessorBlocks(I->getParent())) 750e8c92dd439581bec7e3516cbdbea74e2e60fe7f0Dan Gohman return false; 751e8c92dd439581bec7e3516cbdbea74e2e60fe7f0Dan Gohman 7528ba3aa7f9c5048c31172788f98ad2b90ffad565aDan Gohman DL = I->getDebugLoc(); 7538ba3aa7f9c5048c31172788f98ad2b90ffad565aDan Gohman 7546e3ff375474c4fd78feb0b8463eb273a23cb4404Dan Gohman // First, try doing target-independent selection. 7558ba3aa7f9c5048c31172788f98ad2b90ffad565aDan Gohman if (SelectOperator(I, I->getOpcode())) { 7568ba3aa7f9c5048c31172788f98ad2b90ffad565aDan Gohman DL = DebugLoc(); 7576e3ff375474c4fd78feb0b8463eb273a23cb4404Dan Gohman return true; 7588ba3aa7f9c5048c31172788f98ad2b90ffad565aDan Gohman } 7596e3ff375474c4fd78feb0b8463eb273a23cb4404Dan Gohman 7606e3ff375474c4fd78feb0b8463eb273a23cb4404Dan Gohman // Next, try calling the target to attempt to handle the instruction. 7618ba3aa7f9c5048c31172788f98ad2b90ffad565aDan Gohman if (TargetSelectInstruction(I)) { 7628ba3aa7f9c5048c31172788f98ad2b90ffad565aDan Gohman DL = DebugLoc(); 7636e3ff375474c4fd78feb0b8463eb273a23cb4404Dan Gohman return true; 7648ba3aa7f9c5048c31172788f98ad2b90ffad565aDan Gohman } 7656e3ff375474c4fd78feb0b8463eb273a23cb4404Dan Gohman 7668ba3aa7f9c5048c31172788f98ad2b90ffad565aDan Gohman DL = DebugLoc(); 7676e3ff375474c4fd78feb0b8463eb273a23cb4404Dan Gohman return false; 76840b189e4e257924d90aaf63bf2e12bc7bbca961aDan Gohman} 76940b189e4e257924d90aaf63bf2e12bc7bbca961aDan Gohman 770d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohman/// FastEmitBranch - Emit an unconditional branch to the given block, 771d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohman/// unless it is the immediate (fall-through) successor, and update 772d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohman/// the CFG. 773d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohmanvoid 7743bf912593301152b65accb9d9c37a95172f1df5aStuart HastingsFastISel::FastEmitBranch(MachineBasicBlock *MSucc, DebugLoc DL) { 77584023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman if (FuncInfo.MBB->isLayoutSuccessor(MSucc)) { 776d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohman // The unconditional fall-through case, which needs no instructions. 777d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohman } else { 778d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohman // The unconditional branch case. 77984023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman TII.InsertBranch(*FuncInfo.MBB, MSucc, NULL, 78084023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman SmallVector<MachineOperand, 0>(), DL); 781d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohman } 78284023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman FuncInfo.MBB->addSuccessor(MSucc); 783d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohman} 784d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohman 7853d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman/// SelectFNeg - Emit an FNeg operation. 7863d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman/// 7873d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohmanbool 78846510a73e977273ec67747eb34cbdb43f815e451Dan GohmanFastISel::SelectFNeg(const User *I) { 7893d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman unsigned OpReg = getRegForValue(BinaryOperator::getFNegArgument(I)); 7903d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman if (OpReg == 0) return false; 7913d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman 792a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman bool OpRegIsKill = hasTrivialKill(I); 793a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman 7944a215a13c3035a8818254b61267be77def4a2a37Dan Gohman // If the target has ISD::FNEG, use it. 7954a215a13c3035a8818254b61267be77def4a2a37Dan Gohman EVT VT = TLI.getValueType(I->getType()); 7964a215a13c3035a8818254b61267be77def4a2a37Dan Gohman unsigned ResultReg = FastEmit_r(VT.getSimpleVT(), VT.getSimpleVT(), 797a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman ISD::FNEG, OpReg, OpRegIsKill); 7984a215a13c3035a8818254b61267be77def4a2a37Dan Gohman if (ResultReg != 0) { 7994a215a13c3035a8818254b61267be77def4a2a37Dan Gohman UpdateValueMap(I, ResultReg); 8004a215a13c3035a8818254b61267be77def4a2a37Dan Gohman return true; 8014a215a13c3035a8818254b61267be77def4a2a37Dan Gohman } 8024a215a13c3035a8818254b61267be77def4a2a37Dan Gohman 8035e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman // Bitcast the value to integer, twiddle the sign bit with xor, 8045e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman // and then bitcast it back to floating-point. 8053d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman if (VT.getSizeInBits() > 64) return false; 8065e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman EVT IntVT = EVT::getIntegerVT(I->getContext(), VT.getSizeInBits()); 8075e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman if (!TLI.isTypeLegal(IntVT)) 8085e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman return false; 8095e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman 8105e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman unsigned IntReg = FastEmit_r(VT.getSimpleVT(), IntVT.getSimpleVT(), 811bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck ISD::BITCAST, OpReg, OpRegIsKill); 8125e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman if (IntReg == 0) 8135e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman return false; 8145e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman 815a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned IntResultReg = FastEmit_ri_(IntVT.getSimpleVT(), ISD::XOR, 816a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IntReg, /*Kill=*/true, 8175e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman UINT64_C(1) << (VT.getSizeInBits()-1), 8185e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman IntVT.getSimpleVT()); 8195e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman if (IntResultReg == 0) 8205e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman return false; 8215e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman 8225e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman ResultReg = FastEmit_r(IntVT.getSimpleVT(), VT.getSimpleVT(), 823bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck ISD::BITCAST, IntResultReg, /*Kill=*/true); 8243d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman if (ResultReg == 0) 8253d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman return false; 8263d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman 8273d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman UpdateValueMap(I, ResultReg); 8283d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman return true; 8293d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman} 8303d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman 83140b189e4e257924d90aaf63bf2e12bc7bbca961aDan Gohmanbool 83246510a73e977273ec67747eb34cbdb43f815e451Dan GohmanFastISel::SelectOperator(const User *I, unsigned Opcode) { 83340b189e4e257924d90aaf63bf2e12bc7bbca961aDan Gohman switch (Opcode) { 834ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman case Instruction::Add: 835ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman return SelectBinaryOp(I, ISD::ADD); 836ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman case Instruction::FAdd: 837ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman return SelectBinaryOp(I, ISD::FADD); 838ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman case Instruction::Sub: 839ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman return SelectBinaryOp(I, ISD::SUB); 840ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman case Instruction::FSub: 8413d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman // FNeg is currently represented in LLVM IR as a special case of FSub. 8423d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman if (BinaryOperator::isFNeg(I)) 8433d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman return SelectFNeg(I); 844ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman return SelectBinaryOp(I, ISD::FSUB); 845ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman case Instruction::Mul: 846ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman return SelectBinaryOp(I, ISD::MUL); 847ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman case Instruction::FMul: 848ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman return SelectBinaryOp(I, ISD::FMUL); 8493df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::SDiv: 8503df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::SDIV); 8513df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::UDiv: 8523df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::UDIV); 8533df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::FDiv: 8543df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::FDIV); 8553df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::SRem: 8563df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::SREM); 8573df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::URem: 8583df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::UREM); 8593df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::FRem: 8603df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::FREM); 8613df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::Shl: 8623df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::SHL); 8633df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::LShr: 8643df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::SRL); 8653df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::AShr: 8663df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::SRA); 8673df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::And: 8683df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::AND); 8693df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::Or: 8703df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::OR); 8713df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::Xor: 8723df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::XOR); 8733df24e667f04a7003342b534310919abc9c87418Dan Gohman 8743df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::GetElementPtr: 8753df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectGetElementPtr(I); 8763df24e667f04a7003342b534310919abc9c87418Dan Gohman 8773df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::Br: { 87846510a73e977273ec67747eb34cbdb43f815e451Dan Gohman const BranchInst *BI = cast<BranchInst>(I); 8793df24e667f04a7003342b534310919abc9c87418Dan Gohman 8803df24e667f04a7003342b534310919abc9c87418Dan Gohman if (BI->isUnconditional()) { 88146510a73e977273ec67747eb34cbdb43f815e451Dan Gohman const BasicBlock *LLVMSucc = BI->getSuccessor(0); 882a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman MachineBasicBlock *MSucc = FuncInfo.MBBMap[LLVMSucc]; 8833bf912593301152b65accb9d9c37a95172f1df5aStuart Hastings FastEmitBranch(MSucc, BI->getDebugLoc()); 8843df24e667f04a7003342b534310919abc9c87418Dan Gohman return true; 8859d5b41624003daf259b33fc953aa471049700353Owen Anderson } 8863df24e667f04a7003342b534310919abc9c87418Dan Gohman 8873df24e667f04a7003342b534310919abc9c87418Dan Gohman // Conditional branches are not handed yet. 8883df24e667f04a7003342b534310919abc9c87418Dan Gohman // Halt "fast" selection and bail. 8893df24e667f04a7003342b534310919abc9c87418Dan Gohman return false; 890b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman } 891b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 892087c8507e592bbbede1746f07bd44b28559e3684Dan Gohman case Instruction::Unreachable: 893087c8507e592bbbede1746f07bd44b28559e3684Dan Gohman // Nothing to emit. 894087c8507e592bbbede1746f07bd44b28559e3684Dan Gohman return true; 895087c8507e592bbbede1746f07bd44b28559e3684Dan Gohman 8960586d91bb3e516d5826826522d9a90ed6ef74d86Dan Gohman case Instruction::Alloca: 8970586d91bb3e516d5826826522d9a90ed6ef74d86Dan Gohman // FunctionLowering has the static-sized case covered. 898a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman if (FuncInfo.StaticAllocaMap.count(cast<AllocaInst>(I))) 8990586d91bb3e516d5826826522d9a90ed6ef74d86Dan Gohman return true; 9000586d91bb3e516d5826826522d9a90ed6ef74d86Dan Gohman 9010586d91bb3e516d5826826522d9a90ed6ef74d86Dan Gohman // Dynamic-sized alloca is not handled yet. 9020586d91bb3e516d5826826522d9a90ed6ef74d86Dan Gohman return false; 903bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 90433134c4a75558288d663267c8991f6bd37a530afDan Gohman case Instruction::Call: 90533134c4a75558288d663267c8991f6bd37a530afDan Gohman return SelectCall(I); 906bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 9073df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::BitCast: 9083df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBitCast(I); 9093df24e667f04a7003342b534310919abc9c87418Dan Gohman 9103df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::FPToSI: 9113df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectCast(I, ISD::FP_TO_SINT); 9123df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::ZExt: 9133df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectCast(I, ISD::ZERO_EXTEND); 9143df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::SExt: 9153df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectCast(I, ISD::SIGN_EXTEND); 9163df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::Trunc: 9173df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectCast(I, ISD::TRUNCATE); 9183df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::SIToFP: 9193df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectCast(I, ISD::SINT_TO_FP); 9203df24e667f04a7003342b534310919abc9c87418Dan Gohman 9213df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::IntToPtr: // Deliberate fall-through. 9223df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::PtrToInt: { 923e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT SrcVT = TLI.getValueType(I->getOperand(0)->getType()); 924e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT DstVT = TLI.getValueType(I->getType()); 9253df24e667f04a7003342b534310919abc9c87418Dan Gohman if (DstVT.bitsGT(SrcVT)) 9263df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectCast(I, ISD::ZERO_EXTEND); 9273df24e667f04a7003342b534310919abc9c87418Dan Gohman if (DstVT.bitsLT(SrcVT)) 9283df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectCast(I, ISD::TRUNCATE); 9293df24e667f04a7003342b534310919abc9c87418Dan Gohman unsigned Reg = getRegForValue(I->getOperand(0)); 9303df24e667f04a7003342b534310919abc9c87418Dan Gohman if (Reg == 0) return false; 9313df24e667f04a7003342b534310919abc9c87418Dan Gohman UpdateValueMap(I, Reg); 9323df24e667f04a7003342b534310919abc9c87418Dan Gohman return true; 9333df24e667f04a7003342b534310919abc9c87418Dan Gohman } 934d57dd5f4e6740520820bc0fca42a540e31c27a73Dan Gohman 935ba5be5c07bb19dcf484e3aa40cd139dd07c10407Dan Gohman case Instruction::PHI: 936ba5be5c07bb19dcf484e3aa40cd139dd07c10407Dan Gohman llvm_unreachable("FastISel shouldn't visit PHI nodes!"); 937ba5be5c07bb19dcf484e3aa40cd139dd07c10407Dan Gohman 9383df24e667f04a7003342b534310919abc9c87418Dan Gohman default: 9393df24e667f04a7003342b534310919abc9c87418Dan Gohman // Unhandled instruction. Halt "fast" selection and bail. 9403df24e667f04a7003342b534310919abc9c87418Dan Gohman return false; 9413df24e667f04a7003342b534310919abc9c87418Dan Gohman } 942b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman} 943b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 944a4160c3434b08288d1f79f1acbe453d1b9610b22Dan GohmanFastISel::FastISel(FunctionLoweringInfo &funcInfo) 94584023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman : FuncInfo(funcInfo), 946a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman MRI(FuncInfo.MF->getRegInfo()), 947a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman MFI(*FuncInfo.MF->getFrameInfo()), 948a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman MCP(*FuncInfo.MF->getConstantPool()), 949a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman TM(FuncInfo.MF->getTarget()), 95022bb31103de3337f0bb74c7bee16d1817d4dca14Dan Gohman TD(*TM.getTargetData()), 95122bb31103de3337f0bb74c7bee16d1817d4dca14Dan Gohman TII(*TM.getInstrInfo()), 952a7a0ed79012ea36f838239cf1d04959711aec2a9Dan Gohman TLI(*TM.getTargetLowering()), 95384023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman TRI(*TM.getRegisterInfo()) { 954bb466331e7e50d03497ce40ee344870236fd9c32Dan Gohman} 955bb466331e7e50d03497ce40ee344870236fd9c32Dan Gohman 956e285a74f7cf9dd3ccf4fe758576cf83301f8a43eDan GohmanFastISel::~FastISel() {} 957e285a74f7cf9dd3ccf4fe758576cf83301f8a43eDan Gohman 958825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Andersonunsigned FastISel::FastEmit_(MVT, MVT, 9597c3ecb6838ef7a2ca306c0f3cd68022f0855ae71Dan Gohman unsigned) { 960b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman return 0; 961b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman} 962b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 963825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Andersonunsigned FastISel::FastEmit_r(MVT, MVT, 964a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned, 965a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned /*Op0*/, bool /*Op0IsKill*/) { 966b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman return 0; 967b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman} 968b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 969bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peckunsigned FastISel::FastEmit_rr(MVT, MVT, 970a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned, 971a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned /*Op0*/, bool /*Op0IsKill*/, 972a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned /*Op1*/, bool /*Op1IsKill*/) { 973b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman return 0; 974b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman} 975b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 9767c3ecb6838ef7a2ca306c0f3cd68022f0855ae71Dan Gohmanunsigned FastISel::FastEmit_i(MVT, MVT, unsigned, uint64_t /*Imm*/) { 97783785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng return 0; 97883785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng} 97983785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng 980825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Andersonunsigned FastISel::FastEmit_f(MVT, MVT, 98146510a73e977273ec67747eb34cbdb43f815e451Dan Gohman unsigned, const ConstantFP * /*FPImm*/) { 98210df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman return 0; 98310df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman} 98410df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman 985825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Andersonunsigned FastISel::FastEmit_ri(MVT, MVT, 986a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned, 987a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned /*Op0*/, bool /*Op0IsKill*/, 9880f84e4e31009eecf2dfcbe6113b65d0919f30254Owen Anderson uint64_t /*Imm*/) { 989d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman return 0; 990d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman} 991d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman 992825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Andersonunsigned FastISel::FastEmit_rf(MVT, MVT, 993a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned, 994a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned /*Op0*/, bool /*Op0IsKill*/, 99546510a73e977273ec67747eb34cbdb43f815e451Dan Gohman const ConstantFP * /*FPImm*/) { 99610df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman return 0; 99710df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman} 99810df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman 999825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Andersonunsigned FastISel::FastEmit_rri(MVT, MVT, 10007c3ecb6838ef7a2ca306c0f3cd68022f0855ae71Dan Gohman unsigned, 1001a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned /*Op0*/, bool /*Op0IsKill*/, 1002a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned /*Op1*/, bool /*Op1IsKill*/, 1003d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman uint64_t /*Imm*/) { 100483785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng return 0; 100583785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng} 100683785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng 100783785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng/// FastEmit_ri_ - This method is a wrapper of FastEmit_ri. It first tries 100883785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng/// to emit an instruction with an immediate operand using FastEmit_ri. 100983785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng/// If that fails, it materializes the immediate into a register and try 101083785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng/// FastEmit_rr instead. 10117c3ecb6838ef7a2ca306c0f3cd68022f0855ae71Dan Gohmanunsigned FastISel::FastEmit_ri_(MVT VT, unsigned Opcode, 1012a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned Op0, bool Op0IsKill, 1013a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman uint64_t Imm, MVT ImmType) { 1014602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner // If this is a multiply by a power of two, emit this as a shift left. 1015602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner if (Opcode == ISD::MUL && isPowerOf2_64(Imm)) { 1016602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner Opcode = ISD::SHL; 1017602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner Imm = Log2_64(Imm); 1018090ca9108b35a60e8b97b67987d00cf47a383dbaChris Lattner } else if (Opcode == ISD::UDIV && isPowerOf2_64(Imm)) { 1019090ca9108b35a60e8b97b67987d00cf47a383dbaChris Lattner // div x, 8 -> srl x, 3 1020090ca9108b35a60e8b97b67987d00cf47a383dbaChris Lattner Opcode = ISD::SRL; 1021090ca9108b35a60e8b97b67987d00cf47a383dbaChris Lattner Imm = Log2_64(Imm); 1022602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner } 1023d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 1024602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner // Horrible hack (to be removed), check to make sure shift amounts are 1025602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner // in-range. 1026602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner if ((Opcode == ISD::SHL || Opcode == ISD::SRA || Opcode == ISD::SRL) && 1027602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner Imm >= VT.getSizeInBits()) 1028602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner return 0; 1029d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 103083785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // First check if immediate type is legal. If not, we can't use the ri form. 1031a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned ResultReg = FastEmit_ri(VT, VT, Opcode, Op0, Op0IsKill, Imm); 103283785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng if (ResultReg != 0) 103383785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng return ResultReg; 10340f84e4e31009eecf2dfcbe6113b65d0919f30254Owen Anderson unsigned MaterialReg = FastEmit_i(ImmType, ImmType, ISD::Constant, Imm); 1035d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman if (MaterialReg == 0) 1036d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman return 0; 1037a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman return FastEmit_rr(VT, VT, Opcode, 1038a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman Op0, Op0IsKill, 1039a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman MaterialReg, /*Kill=*/true); 1040d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman} 1041d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman 1042d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohmanunsigned FastISel::createResultReg(const TargetRegisterClass* RC) { 1043d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman return MRI.createVirtualRegister(RC); 104483785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng} 104583785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng 1046b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohmanunsigned FastISel::FastEmitInst_(unsigned MachineInstOpcode, 104777ad79689d755c49146f534107421cb3d9703fedDan Gohman const TargetRegisterClass* RC) { 1048d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman unsigned ResultReg = createResultReg(RC); 1049bb466331e7e50d03497ce40ee344870236fd9c32Dan Gohman const TargetInstrDesc &II = TII.get(MachineInstOpcode); 1050b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 105184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg); 1052b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman return ResultReg; 1053b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman} 1054b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 1055b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohmanunsigned FastISel::FastEmitInst_r(unsigned MachineInstOpcode, 1056b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman const TargetRegisterClass *RC, 1057a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned Op0, bool Op0IsKill) { 1058d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman unsigned ResultReg = createResultReg(RC); 1059bb466331e7e50d03497ce40ee344870236fd9c32Dan Gohman const TargetInstrDesc &II = TII.get(MachineInstOpcode); 1060b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 10615960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng if (II.getNumDefs() >= 1) 106284023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg) 106384023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill); 10645960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng else { 106584023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 106684023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill); 1067e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 1068e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen ResultReg).addReg(II.ImplicitDefs[0]); 10695960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng } 10705960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng 1071b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman return ResultReg; 1072b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman} 1073b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 1074b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohmanunsigned FastISel::FastEmitInst_rr(unsigned MachineInstOpcode, 1075b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman const TargetRegisterClass *RC, 1076a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned Op0, bool Op0IsKill, 1077a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned Op1, bool Op1IsKill) { 1078d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman unsigned ResultReg = createResultReg(RC); 1079bb466331e7e50d03497ce40ee344870236fd9c32Dan Gohman const TargetInstrDesc &II = TII.get(MachineInstOpcode); 1080b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 10815960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng if (II.getNumDefs() >= 1) 108284023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg) 1083a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill) 1084a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op1, Op1IsKill * RegState::Kill); 10855960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng else { 108684023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 1087a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill) 1088a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op1, Op1IsKill * RegState::Kill); 1089e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 1090e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen ResultReg).addReg(II.ImplicitDefs[0]); 10915960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng } 1092b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman return ResultReg; 1093b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman} 1094d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman 1095d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohmanunsigned FastISel::FastEmitInst_ri(unsigned MachineInstOpcode, 1096d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman const TargetRegisterClass *RC, 1097a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned Op0, bool Op0IsKill, 1098a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman uint64_t Imm) { 1099d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman unsigned ResultReg = createResultReg(RC); 1100d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman const TargetInstrDesc &II = TII.get(MachineInstOpcode); 1101d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman 11025960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng if (II.getNumDefs() >= 1) 110384023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg) 1104a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill) 1105a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addImm(Imm); 11065960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng else { 110784023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 1108a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill) 1109a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addImm(Imm); 1110e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 1111e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen ResultReg).addReg(II.ImplicitDefs[0]); 11125960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng } 1113d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman return ResultReg; 1114d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman} 1115d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman 11162ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Andersonunsigned FastISel::FastEmitInst_rii(unsigned MachineInstOpcode, 11172ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson const TargetRegisterClass *RC, 11182ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson unsigned Op0, bool Op0IsKill, 11192ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson uint64_t Imm1, uint64_t Imm2) { 11202ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson unsigned ResultReg = createResultReg(RC); 11212ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson const TargetInstrDesc &II = TII.get(MachineInstOpcode); 11222ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson 11232ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson if (II.getNumDefs() >= 1) 11242ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg) 11252ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson .addReg(Op0, Op0IsKill * RegState::Kill) 11262ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson .addImm(Imm1) 11272ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson .addImm(Imm2); 11282ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson else { 11292ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 11302ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson .addReg(Op0, Op0IsKill * RegState::Kill) 11312ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson .addImm(Imm1) 11322ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson .addImm(Imm2); 11332ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 11342ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson ResultReg).addReg(II.ImplicitDefs[0]); 11352ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson } 11362ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson return ResultReg; 11372ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson} 11382ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson 113910df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohmanunsigned FastISel::FastEmitInst_rf(unsigned MachineInstOpcode, 114010df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman const TargetRegisterClass *RC, 1141a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned Op0, bool Op0IsKill, 1142a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman const ConstantFP *FPImm) { 114310df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman unsigned ResultReg = createResultReg(RC); 114410df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman const TargetInstrDesc &II = TII.get(MachineInstOpcode); 114510df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman 11465960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng if (II.getNumDefs() >= 1) 114784023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg) 1148a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill) 1149a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addFPImm(FPImm); 11505960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng else { 115184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 1152a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill) 1153a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addFPImm(FPImm); 1154e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 1155e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen ResultReg).addReg(II.ImplicitDefs[0]); 11565960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng } 115710df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman return ResultReg; 115810df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman} 115910df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman 1160d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohmanunsigned FastISel::FastEmitInst_rri(unsigned MachineInstOpcode, 1161d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman const TargetRegisterClass *RC, 1162a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned Op0, bool Op0IsKill, 1163a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned Op1, bool Op1IsKill, 1164a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman uint64_t Imm) { 1165d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman unsigned ResultReg = createResultReg(RC); 1166d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman const TargetInstrDesc &II = TII.get(MachineInstOpcode); 1167d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman 11685960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng if (II.getNumDefs() >= 1) 116984023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg) 1170a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill) 1171a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op1, Op1IsKill * RegState::Kill) 1172a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addImm(Imm); 11735960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng else { 117484023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 1175a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill) 1176a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op1, Op1IsKill * RegState::Kill) 1177a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addImm(Imm); 1178e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 1179e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen ResultReg).addReg(II.ImplicitDefs[0]); 11805960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng } 1181d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman return ResultReg; 1182d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman} 11836d0c25ec3a7ca822e68f73a4481eee43eb5c9485Owen Anderson 11846d0c25ec3a7ca822e68f73a4481eee43eb5c9485Owen Andersonunsigned FastISel::FastEmitInst_i(unsigned MachineInstOpcode, 11856d0c25ec3a7ca822e68f73a4481eee43eb5c9485Owen Anderson const TargetRegisterClass *RC, 11866d0c25ec3a7ca822e68f73a4481eee43eb5c9485Owen Anderson uint64_t Imm) { 11876d0c25ec3a7ca822e68f73a4481eee43eb5c9485Owen Anderson unsigned ResultReg = createResultReg(RC); 11886d0c25ec3a7ca822e68f73a4481eee43eb5c9485Owen Anderson const TargetInstrDesc &II = TII.get(MachineInstOpcode); 1189bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 11905960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng if (II.getNumDefs() >= 1) 119184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg).addImm(Imm); 11925960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng else { 119384023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II).addImm(Imm); 1194e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 1195e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen ResultReg).addReg(II.ImplicitDefs[0]); 11965960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng } 11976d0c25ec3a7ca822e68f73a4481eee43eb5c9485Owen Anderson return ResultReg; 1198b41aec54767a825ac54c8822e787700bb08a3460Evan Cheng} 11998970f00deff00ffce1f35cf00883357e1582daa1Owen Anderson 1200d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Andersonunsigned FastISel::FastEmitInst_ii(unsigned MachineInstOpcode, 1201d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson const TargetRegisterClass *RC, 1202d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson uint64_t Imm1, uint64_t Imm2) { 1203d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson unsigned ResultReg = createResultReg(RC); 1204d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson const TargetInstrDesc &II = TII.get(MachineInstOpcode); 1205d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 1206d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson if (II.getNumDefs() >= 1) 1207d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg) 1208d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson .addImm(Imm1).addImm(Imm2); 1209d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson else { 1210d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II).addImm(Imm1).addImm(Imm2); 1211d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 1212d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson ResultReg).addReg(II.ImplicitDefs[0]); 1213d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson } 1214d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson return ResultReg; 1215d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson} 1216d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 1217825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Andersonunsigned FastISel::FastEmitInst_extractsubreg(MVT RetVT, 1218a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned Op0, bool Op0IsKill, 1219a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman uint32_t Idx) { 1220536ab130ec95cbb7bf30530251dafa7dfecc8471Evan Cheng unsigned ResultReg = createResultReg(TLI.getRegClassFor(RetVT)); 12210bc25f40402f48ba42fc45403f635b20d90fabb3Jakob Stoklund Olesen assert(TargetRegisterInfo::isVirtualRegister(Op0) && 12220bc25f40402f48ba42fc45403f635b20d90fabb3Jakob Stoklund Olesen "Cannot yet extract from physregs"); 122384023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, 122484023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman DL, TII.get(TargetOpcode::COPY), ResultReg) 12250bc25f40402f48ba42fc45403f635b20d90fabb3Jakob Stoklund Olesen .addReg(Op0, getKillRegState(Op0IsKill), Idx); 12268970f00deff00ffce1f35cf00883357e1582daa1Owen Anderson return ResultReg; 12278970f00deff00ffce1f35cf00883357e1582daa1Owen Anderson} 122814ea1ec2324cb595f2e035bbf54ddcd483f17c11Dan Gohman 122914ea1ec2324cb595f2e035bbf54ddcd483f17c11Dan Gohman/// FastEmitZExtFromI1 - Emit MachineInstrs to compute the value of Op 123014ea1ec2324cb595f2e035bbf54ddcd483f17c11Dan Gohman/// with all but the least significant bit set to zero. 1231a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohmanunsigned FastISel::FastEmitZExtFromI1(MVT VT, unsigned Op0, bool Op0IsKill) { 1232a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman return FastEmit_ri(VT, VT, ISD::AND, Op0, Op0IsKill, 1); 123314ea1ec2324cb595f2e035bbf54ddcd483f17c11Dan Gohman} 1234f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1235f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman/// HandlePHINodesInSuccessorBlocks - Handle PHI nodes in successor blocks. 1236f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman/// Emit code to ensure constants are copied into registers when needed. 1237f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman/// Remember the virtual registers that need to be added to the Machine PHI 1238f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman/// nodes as input. We cannot just directly add them, because expansion 1239f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman/// might result in multiple MBB's for one BB. As such, the start of the 1240f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman/// BB might correspond to a different MBB than the end. 1241f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohmanbool FastISel::HandlePHINodesInSuccessorBlocks(const BasicBlock *LLVMBB) { 1242f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman const TerminatorInst *TI = LLVMBB->getTerminator(); 1243f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1244f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman SmallPtrSet<MachineBasicBlock *, 4> SuccsHandled; 1245a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman unsigned OrigNumPHINodesToUpdate = FuncInfo.PHINodesToUpdate.size(); 1246f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1247f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // Check successor nodes' PHI nodes that expect a constant to be available 1248f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // from this block. 1249f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman for (unsigned succ = 0, e = TI->getNumSuccessors(); succ != e; ++succ) { 1250f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman const BasicBlock *SuccBB = TI->getSuccessor(succ); 1251f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman if (!isa<PHINode>(SuccBB->begin())) continue; 1252a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman MachineBasicBlock *SuccMBB = FuncInfo.MBBMap[SuccBB]; 1253f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1254f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // If this terminator has multiple identical successors (common for 1255f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // switches), only handle each succ once. 1256f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman if (!SuccsHandled.insert(SuccMBB)) continue; 1257f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1258f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman MachineBasicBlock::iterator MBBI = SuccMBB->begin(); 1259f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1260f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // At this point we know that there is a 1-1 correspondence between LLVM PHI 1261f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // nodes and Machine PHI nodes, but the incoming operands have not been 1262f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // emitted yet. 1263f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman for (BasicBlock::const_iterator I = SuccBB->begin(); 1264f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman const PHINode *PN = dyn_cast<PHINode>(I); ++I) { 1265fb95f89e8ebd0b71408472e2544e2b8d6d4738e5Dan Gohman 1266f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // Ignore dead phi's. 1267f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman if (PN->use_empty()) continue; 1268f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1269f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // Only handle legal types. Two interesting things to note here. First, 1270f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // by bailing out early, we may leave behind some dead instructions, 1271f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // since SelectionDAG's HandlePHINodesInSuccessorBlocks will insert its 12727a2bdde0a0eebcd2125055e0eacaca040f0b766cChris Lattner // own moves. Second, this check is necessary because FastISel doesn't 127389496d0eb73ab8771b27b3d9c1db6492d8eefc3aDan Gohman // use CreateRegs to create registers, so it always creates 1274f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // exactly one register for each non-void instruction. 1275f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman EVT VT = TLI.getValueType(PN->getType(), /*AllowUnknown=*/true); 1276f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman if (VT == MVT::Other || !TLI.isTypeLegal(VT)) { 1277f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // Promote MVT::i1. 1278f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman if (VT == MVT::i1) 1279f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman VT = TLI.getTypeToTransformTo(LLVMBB->getContext(), VT); 1280f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman else { 1281a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman FuncInfo.PHINodesToUpdate.resize(OrigNumPHINodesToUpdate); 1282f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman return false; 1283f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman } 1284f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman } 1285f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1286f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman const Value *PHIOp = PN->getIncomingValueForBlock(LLVMBB); 1287f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1288fb95f89e8ebd0b71408472e2544e2b8d6d4738e5Dan Gohman // Set the DebugLoc for the copy. Prefer the location of the operand 1289fb95f89e8ebd0b71408472e2544e2b8d6d4738e5Dan Gohman // if there is one; use the location of the PHI otherwise. 1290fb95f89e8ebd0b71408472e2544e2b8d6d4738e5Dan Gohman DL = PN->getDebugLoc(); 1291fb95f89e8ebd0b71408472e2544e2b8d6d4738e5Dan Gohman if (const Instruction *Inst = dyn_cast<Instruction>(PHIOp)) 1292fb95f89e8ebd0b71408472e2544e2b8d6d4738e5Dan Gohman DL = Inst->getDebugLoc(); 1293fb95f89e8ebd0b71408472e2544e2b8d6d4738e5Dan Gohman 1294f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman unsigned Reg = getRegForValue(PHIOp); 1295f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman if (Reg == 0) { 1296a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman FuncInfo.PHINodesToUpdate.resize(OrigNumPHINodesToUpdate); 1297f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman return false; 1298f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman } 1299a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman FuncInfo.PHINodesToUpdate.push_back(std::make_pair(MBBI++, Reg)); 1300fb95f89e8ebd0b71408472e2544e2b8d6d4738e5Dan Gohman DL = DebugLoc(); 1301f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman } 1302f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman } 1303f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1304f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman return true; 1305f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman} 1306