FastISel.cpp revision 74af88a6661ad5185924bf39164fb4aa144d32cf
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" 472586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman#include "llvm/CodeGen/Analysis.h" 48b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman#include "llvm/CodeGen/FastISel.h" 494c3fd9f92f89810d659973d2666ab729758de64aDan Gohman#include "llvm/CodeGen/FunctionLoweringInfo.h" 50b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman#include "llvm/CodeGen/MachineInstrBuilder.h" 5133134c4a75558288d663267c8991f6bd37a530afDan Gohman#include "llvm/CodeGen/MachineModuleInfo.h" 52b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman#include "llvm/CodeGen/MachineRegisterInfo.h" 5383489bb7700c69b7a4a8da59365c42d3f5c8129bDevang Patel#include "llvm/Analysis/DebugInfo.h" 547fbcc98f20c062273bf16ce9832f40e5b8a205c6Dan Gohman#include "llvm/Analysis/Loads.h" 5583785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng#include "llvm/Target/TargetData.h" 56b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman#include "llvm/Target/TargetInstrInfo.h" 5783785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng#include "llvm/Target/TargetLowering.h" 58bb466331e7e50d03497ce40ee344870236fd9c32Dan Gohman#include "llvm/Target/TargetMachine.h" 59ba5be5c07bb19dcf484e3aa40cd139dd07c10407Dan Gohman#include "llvm/Support/ErrorHandling.h" 60afeaae7a940ce16e7874af31f3e5e91d8ca89e19Devang Patel#include "llvm/Support/Debug.h" 61b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohmanusing namespace llvm; 62b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 6384023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman/// startNewBlock - Set the current block to which generated machine 6484023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman/// instructions will be appended, and clear the local CSE map. 6584023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman/// 6684023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohmanvoid FastISel::startNewBlock() { 6784023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman LocalValueMap.clear(); 6884023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 6974af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin EmitStartPt = 0; 7084023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 7174af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin // Advance the emit start point past any EH_LABEL instructions. 7284023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman MachineBasicBlock::iterator 7384023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman I = FuncInfo.MBB->begin(), E = FuncInfo.MBB->end(); 7484023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman while (I != E && I->getOpcode() == TargetOpcode::EH_LABEL) { 7574af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin EmitStartPt = I; 7684023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman ++I; 7784023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman } 7874af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin LastLocalValue = EmitStartPt; 7974af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin} 8074af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin 8174af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasinvoid FastISel::flushLocalValueMap() { 8274af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin LocalValueMap.clear(); 8374af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin LastLocalValue = EmitStartPt; 8474af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin recomputeInsertPt(); 8584023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman} 8684023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 87a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohmanbool FastISel::hasTrivialKill(const Value *V) const { 887f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman // Don't consider constants or arguments to have trivial kills. 89a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman const Instruction *I = dyn_cast<Instruction>(V); 907f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman if (!I) 917f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman return false; 927f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman 937f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman // No-op casts are trivially coalesced by fast-isel. 947f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman if (const CastInst *Cast = dyn_cast<CastInst>(I)) 957f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman if (Cast->isNoopCast(TD.getIntPtrType(Cast->getContext())) && 967f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman !hasTrivialKill(Cast->getOperand(0))) 977f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman return false; 987f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman 997f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman // Only instructions with a single use in the same basic block are considered 1007f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman // to have trivial kills. 1017f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman return I->hasOneUse() && 1027f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman !(I->getOpcode() == Instruction::BitCast || 1037f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman I->getOpcode() == Instruction::PtrToInt || 1047f0d69555caab5f5468ddf74b5840f59c4c6fd83Dan Gohman I->getOpcode() == Instruction::IntToPtr) && 10596f1d8ebdd33b3f9bdb3b1163f36072c68599f42Gabor Greif cast<Instruction>(*I->use_begin())->getParent() == I->getParent(); 106a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman} 107a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman 10846510a73e977273ec67747eb34cbdb43f815e451Dan Gohmanunsigned FastISel::getRegForValue(const Value *V) { 109e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT RealVT = TLI.getValueType(V->getType(), /*AllowUnknown=*/true); 1104fd552880c9f42f117bd79929ea0179f99bd6bb7Dan Gohman // Don't handle non-simple values in FastISel. 1114fd552880c9f42f117bd79929ea0179f99bd6bb7Dan Gohman if (!RealVT.isSimple()) 1124fd552880c9f42f117bd79929ea0179f99bd6bb7Dan Gohman return 0; 113821164875706dd28e48c6cc3cea5c8ffa6e658d1Dan Gohman 114c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman // Ignore illegal types. We must do this before looking up the value 115c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman // in ValueMap because Arguments are given virtual registers regardless 116c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman // of whether FastISel can handle them. 117825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson MVT VT = RealVT.getSimpleVT(); 118821164875706dd28e48c6cc3cea5c8ffa6e658d1Dan Gohman if (!TLI.isTypeLegal(VT)) { 11976927d7303046058c627691bd45d6bff608f49f4Eli Friedman // Handle integer promotions, though, because they're common and easy. 12076927d7303046058c627691bd45d6bff608f49f4Eli Friedman if (VT == MVT::i1 || VT == MVT::i8 || VT == MVT::i16) 12123b9b19b1a5a00faa9fce0788155c7dbfd00bfb1Owen Anderson VT = TLI.getTypeToTransformTo(V->getContext(), VT).getSimpleVT(); 122821164875706dd28e48c6cc3cea5c8ffa6e658d1Dan Gohman else 123821164875706dd28e48c6cc3cea5c8ffa6e658d1Dan Gohman return 0; 124821164875706dd28e48c6cc3cea5c8ffa6e658d1Dan Gohman } 125821164875706dd28e48c6cc3cea5c8ffa6e658d1Dan Gohman 126c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman // Look up the value to see if we already have a register for it. We 127c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman // cache values defined by Instructions across blocks, and other values 128c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman // only locally. This is because Instructions already have the SSA 1295c9cf19d1e7d044e786f03331bc3f004966a69d2Dan Gohman // def-dominates-use requirement enforced. 130a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman DenseMap<const Value *, unsigned>::iterator I = FuncInfo.ValueMap.find(V); 131fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner if (I != FuncInfo.ValueMap.end()) 132fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner return I->second; 133fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner 134c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman unsigned Reg = LocalValueMap[V]; 135c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman if (Reg != 0) 136c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman return Reg; 137c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman 13897c94b8fc630b55e17a37481910810639e28d086Dan Gohman // In bottom-up mode, just create the virtual register which will be used 13997c94b8fc630b55e17a37481910810639e28d086Dan Gohman // to hold the value. It will be materialized later. 14084023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman if (isa<Instruction>(V) && 14184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman (!isa<AllocaInst>(V) || 14284023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman !FuncInfo.StaticAllocaMap.count(cast<AllocaInst>(V)))) 14384023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman return FuncInfo.InitializeRegForValue(V); 14484023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 145a10b8494a50108482302f6f077d72fbc76d776edDan Gohman SavePoint SaveInsertPt = enterLocalValueArea(); 14684023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 14784023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman // Materialize the value in a register. Emit any instructions in the 14884023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman // local value area. 14984023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman Reg = materializeRegForValue(V, VT); 15084023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 15184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman leaveLocalValueArea(SaveInsertPt); 15297c94b8fc630b55e17a37481910810639e28d086Dan Gohman 15384023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman return Reg; 1541fdc614bee2a324fcc210d1e46d9b6fca3ca324bDan Gohman} 1551fdc614bee2a324fcc210d1e46d9b6fca3ca324bDan Gohman 15644a2c3476bd15e03f294bae1b50016851f214f8dEric Christopher/// materializeRegForValue - Helper for getRegForValue. This function is 1571fdc614bee2a324fcc210d1e46d9b6fca3ca324bDan Gohman/// called when the value isn't already available in a register and must 1581fdc614bee2a324fcc210d1e46d9b6fca3ca324bDan Gohman/// be materialized with new instructions. 1591fdc614bee2a324fcc210d1e46d9b6fca3ca324bDan Gohmanunsigned FastISel::materializeRegForValue(const Value *V, MVT VT) { 1601fdc614bee2a324fcc210d1e46d9b6fca3ca324bDan Gohman unsigned Reg = 0; 1611fdc614bee2a324fcc210d1e46d9b6fca3ca324bDan Gohman 16246510a73e977273ec67747eb34cbdb43f815e451Dan Gohman if (const ConstantInt *CI = dyn_cast<ConstantInt>(V)) { 1632ff7fd146159d97abe94391a33b4385abb06bbb0Dan Gohman if (CI->getValue().getActiveBits() <= 64) 1642ff7fd146159d97abe94391a33b4385abb06bbb0Dan Gohman Reg = FastEmit_i(VT, VT, ISD::Constant, CI->getZExtValue()); 1650586d91bb3e516d5826826522d9a90ed6ef74d86Dan Gohman } else if (isa<AllocaInst>(V)) { 1662ff7fd146159d97abe94391a33b4385abb06bbb0Dan Gohman Reg = TargetMaterializeAlloca(cast<AllocaInst>(V)); 167205d92589bc8c59d4bba9ddf89e0eb3c4d548cdaDan Gohman } else if (isa<ConstantPointerNull>(V)) { 1681e9e8c3bd5ac018296bddb21a2acb8c643303b39Dan Gohman // Translate this as an integer zero so that it can be 1691e9e8c3bd5ac018296bddb21a2acb8c643303b39Dan Gohman // local-CSE'd with actual integer zeros. 1701d0be15f89cb5056e20e2d24faa8d6afb1573bcaOwen Anderson Reg = 1711d0be15f89cb5056e20e2d24faa8d6afb1573bcaOwen Anderson getRegForValue(Constant::getNullValue(TD.getIntPtrType(V->getContext()))); 17246510a73e977273ec67747eb34cbdb43f815e451Dan Gohman } else if (const ConstantFP *CF = dyn_cast<ConstantFP>(V)) { 173bd1253809bc1b2455793a64d2801db3d6317b08eEli Friedman if (CF->isNullValue()) { 1742790ba8e5a7bb6e00fdac9997d840598fb60271cEli Friedman Reg = TargetMaterializeFloatZero(CF); 1752790ba8e5a7bb6e00fdac9997d840598fb60271cEli Friedman } else { 1762790ba8e5a7bb6e00fdac9997d840598fb60271cEli Friedman // Try to emit the constant directly. 1772790ba8e5a7bb6e00fdac9997d840598fb60271cEli Friedman Reg = FastEmit_f(VT, VT, ISD::ConstantFP, CF); 1782790ba8e5a7bb6e00fdac9997d840598fb60271cEli Friedman } 179ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman 180ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman if (!Reg) { 1814183e31978146ea529a87a2fc47b96aeb6cbe000Dan Gohman // Try to emit the constant by using an integer constant with a cast. 182ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman const APFloat &Flt = CF->getValueAPF(); 183e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT IntVT = TLI.getPointerTy(); 184ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman 185ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman uint64_t x[2]; 186ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman uint32_t IntBitWidth = IntVT.getSizeInBits(); 18723a98551ab65eeb8fe5019df8b7db4891582a4bdDale Johannesen bool isExact; 18823a98551ab65eeb8fe5019df8b7db4891582a4bdDale Johannesen (void) Flt.convertToInteger(x, IntBitWidth, /*isSigned=*/true, 18923a98551ab65eeb8fe5019df8b7db4891582a4bdDale Johannesen APFloat::rmTowardZero, &isExact); 19023a98551ab65eeb8fe5019df8b7db4891582a4bdDale Johannesen if (isExact) { 1913ba292dbc2acee2d1052fb7ffe332e2164147b47Jeffrey Yasskin APInt IntVal(IntBitWidth, x); 192ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman 193e922c0201916e0b980ab3cfe91e1413e68d55647Owen Anderson unsigned IntegerReg = 194eed707b1e6097aac2bb6b3d47271f6300ace7f2eOwen Anderson getRegForValue(ConstantInt::get(V->getContext(), IntVal)); 1952ff7fd146159d97abe94391a33b4385abb06bbb0Dan Gohman if (IntegerReg != 0) 196a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman Reg = FastEmit_r(IntVT.getSimpleVT(), VT, ISD::SINT_TO_FP, 197a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IntegerReg, /*Kill=*/false); 1982ff7fd146159d97abe94391a33b4385abb06bbb0Dan Gohman } 199ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman } 20046510a73e977273ec67747eb34cbdb43f815e451Dan Gohman } else if (const Operator *Op = dyn_cast<Operator>(V)) { 20120d4be151b54feb18aa1e5cc04033a4aa64137aeDan Gohman if (!SelectOperator(Op, Op->getOpcode())) 20220d4be151b54feb18aa1e5cc04033a4aa64137aeDan Gohman if (!isa<Instruction>(Op) || 20320d4be151b54feb18aa1e5cc04033a4aa64137aeDan Gohman !TargetSelectInstruction(cast<Instruction>(Op))) 20420d4be151b54feb18aa1e5cc04033a4aa64137aeDan Gohman return 0; 20537db6cdaea47d0637bdbe624f7b10ff8f82928adDan Gohman Reg = lookUpRegForValue(Op); 206205d92589bc8c59d4bba9ddf89e0eb3c4d548cdaDan Gohman } else if (isa<UndefValue>(V)) { 207104e4ce1629ea84736691bd1ee7867bdf90e8a2eDan Gohman Reg = createResultReg(TLI.getRegClassFor(VT)); 20884023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, 20984023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman TII.get(TargetOpcode::IMPLICIT_DEF), Reg); 210ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman } 211bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 212dceffe66b9e73ce372ea11c0fc6975504eb8c31dDan Gohman // If target-independent code couldn't handle the value, give target-specific 213dceffe66b9e73ce372ea11c0fc6975504eb8c31dDan Gohman // code a try. 2146e6074508c2f781c3e52dfe0e301cb1c7f395a91Owen Anderson if (!Reg && isa<Constant>(V)) 2152ff7fd146159d97abe94391a33b4385abb06bbb0Dan Gohman Reg = TargetMaterializeConstant(cast<Constant>(V)); 216bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 2172ff7fd146159d97abe94391a33b4385abb06bbb0Dan Gohman // Don't cache constant materializations in the general ValueMap. 2182ff7fd146159d97abe94391a33b4385abb06bbb0Dan Gohman // To do so would require tracking what uses they dominate. 21984023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman if (Reg != 0) { 220dceffe66b9e73ce372ea11c0fc6975504eb8c31dDan Gohman LocalValueMap[V] = Reg; 22184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman LastLocalValue = MRI.getVRegDef(Reg); 22284023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman } 223104e4ce1629ea84736691bd1ee7867bdf90e8a2eDan Gohman return Reg; 224ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman} 225ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman 22646510a73e977273ec67747eb34cbdb43f815e451Dan Gohmanunsigned FastISel::lookUpRegForValue(const Value *V) { 22759fbc80f6b3b5c71dfb84149f589625f7ed510e3Evan Cheng // Look up the value to see if we already have a register for it. We 22859fbc80f6b3b5c71dfb84149f589625f7ed510e3Evan Cheng // cache values defined by Instructions across blocks, and other values 22959fbc80f6b3b5c71dfb84149f589625f7ed510e3Evan Cheng // only locally. This is because Instructions already have the SSA 2301fdc614bee2a324fcc210d1e46d9b6fca3ca324bDan Gohman // def-dominates-use requirement enforced. 231a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman DenseMap<const Value *, unsigned>::iterator I = FuncInfo.ValueMap.find(V); 232a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman if (I != FuncInfo.ValueMap.end()) 2333193a689db3de8640d412ccd9482301647359a4eDan Gohman return I->second; 23459fbc80f6b3b5c71dfb84149f589625f7ed510e3Evan Cheng return LocalValueMap[V]; 23559fbc80f6b3b5c71dfb84149f589625f7ed510e3Evan Cheng} 23659fbc80f6b3b5c71dfb84149f589625f7ed510e3Evan Cheng 237cc54e76cc67bbc9badc024ab29053602769bd255Owen Anderson/// UpdateValueMap - Update the value map to include the new mapping for this 238cc54e76cc67bbc9badc024ab29053602769bd255Owen Anderson/// instruction, or insert an extra copy to get the result in a previous 239cc54e76cc67bbc9badc024ab29053602769bd255Owen Anderson/// determined register. 240cc54e76cc67bbc9badc024ab29053602769bd255Owen Anderson/// NOTE: This is only necessary because we might select a block that uses 241cc54e76cc67bbc9badc024ab29053602769bd255Owen Anderson/// a value before we select the block that defines the value. It might be 242cc54e76cc67bbc9badc024ab29053602769bd255Owen Anderson/// possible to fix this by selecting blocks in reverse postorder. 243482feb33b2bba677d47bab859d9e1e95d67016bdEli Friedmanvoid FastISel::UpdateValueMap(const Value *I, unsigned Reg, unsigned NumRegs) { 24440b189e4e257924d90aaf63bf2e12bc7bbca961aDan Gohman if (!isa<Instruction>(I)) { 24540b189e4e257924d90aaf63bf2e12bc7bbca961aDan Gohman LocalValueMap[I] = Reg; 246482feb33b2bba677d47bab859d9e1e95d67016bdEli Friedman return; 247c5040ab6065d5c569a1af0848b6e672b22b174b7Chris Lattner } 248bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 249a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman unsigned &AssignedReg = FuncInfo.ValueMap[I]; 250c5040ab6065d5c569a1af0848b6e672b22b174b7Chris Lattner if (AssignedReg == 0) 25184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman // Use the new register. 252c5040ab6065d5c569a1af0848b6e672b22b174b7Chris Lattner AssignedReg = Reg; 25336e3946ac2f30a0bda66538ef2b974b1c8fbdc97Chris Lattner else if (Reg != AssignedReg) { 25484023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman // Arrange for uses of AssignedReg to be replaced by uses of Reg. 255482feb33b2bba677d47bab859d9e1e95d67016bdEli Friedman for (unsigned i = 0; i < NumRegs; i++) 256482feb33b2bba677d47bab859d9e1e95d67016bdEli Friedman FuncInfo.RegFixups[AssignedReg+i] = Reg+i; 25784023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 25884023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman AssignedReg = Reg; 25940b189e4e257924d90aaf63bf2e12bc7bbca961aDan Gohman } 260cc54e76cc67bbc9badc024ab29053602769bd255Owen Anderson} 261cc54e76cc67bbc9badc024ab29053602769bd255Owen Anderson 262a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohmanstd::pair<unsigned, bool> FastISel::getRegForGEPIndex(const Value *Idx) { 263c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman unsigned IdxN = getRegForValue(Idx); 264c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman if (IdxN == 0) 265c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman // Unhandled operand. Halt "fast" selection and bail. 266a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman return std::pair<unsigned, bool>(0, false); 267a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman 268a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman bool IdxNIsKill = hasTrivialKill(Idx); 269c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman 270c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman // If the index is smaller or larger than intptr_t, truncate or extend it. 271766b5efd99c01e26f00f22d81b57d1385b3d2ab0Owen Anderson MVT PtrVT = TLI.getPointerTy(); 272e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT IdxVT = EVT::getEVT(Idx->getType(), /*HandleUnknown=*/false); 273a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman if (IdxVT.bitsLT(PtrVT)) { 274a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IdxN = FastEmit_r(IdxVT.getSimpleVT(), PtrVT, ISD::SIGN_EXTEND, 275a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IdxN, IdxNIsKill); 276a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IdxNIsKill = true; 277a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman } 278a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman else if (IdxVT.bitsGT(PtrVT)) { 279a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IdxN = FastEmit_r(IdxVT.getSimpleVT(), PtrVT, ISD::TRUNCATE, 280a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IdxN, IdxNIsKill); 281a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IdxNIsKill = true; 282a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman } 283a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman return std::pair<unsigned, bool>(IdxN, IdxNIsKill); 284c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman} 285c8a1a3c426209e9c7b35e279e1578a89edc40af6Dan Gohman 28684023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohmanvoid FastISel::recomputeInsertPt() { 28784023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman if (getLastLocalValue()) { 28884023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman FuncInfo.InsertPt = getLastLocalValue(); 289c6e59b71f50c7c77bc448a936dba8e84d90911e8Dan Gohman FuncInfo.MBB = FuncInfo.InsertPt->getParent(); 29084023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman ++FuncInfo.InsertPt; 29184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman } else 29284023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman FuncInfo.InsertPt = FuncInfo.MBB->getFirstNonPHI(); 29384023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 29484023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman // Now skip past any EH_LABELs, which must remain at the beginning. 29584023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman while (FuncInfo.InsertPt != FuncInfo.MBB->end() && 29684023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman FuncInfo.InsertPt->getOpcode() == TargetOpcode::EH_LABEL) 29784023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman ++FuncInfo.InsertPt; 29884023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman} 29984023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 300a10b8494a50108482302f6f077d72fbc76d776edDan GohmanFastISel::SavePoint FastISel::enterLocalValueArea() { 30184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman MachineBasicBlock::iterator OldInsertPt = FuncInfo.InsertPt; 302163f78ea4016d594d921154d8df1c9d746fb0ea8Dan Gohman DebugLoc OldDL = DL; 30384023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman recomputeInsertPt(); 304a10b8494a50108482302f6f077d72fbc76d776edDan Gohman DL = DebugLoc(); 305163f78ea4016d594d921154d8df1c9d746fb0ea8Dan Gohman SavePoint SP = { OldInsertPt, OldDL }; 306a10b8494a50108482302f6f077d72fbc76d776edDan Gohman return SP; 30784023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman} 30884023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 309a10b8494a50108482302f6f077d72fbc76d776edDan Gohmanvoid FastISel::leaveLocalValueArea(SavePoint OldInsertPt) { 31084023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman if (FuncInfo.InsertPt != FuncInfo.MBB->begin()) 31184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman LastLocalValue = llvm::prior(FuncInfo.InsertPt); 31284023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 31384023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman // Restore the previous insert position. 314a10b8494a50108482302f6f077d72fbc76d776edDan Gohman FuncInfo.InsertPt = OldInsertPt.InsertPt; 315a10b8494a50108482302f6f077d72fbc76d776edDan Gohman DL = OldInsertPt.DL; 31684023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman} 31784023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman 318bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman/// SelectBinaryOp - Select and emit code for a binary operator instruction, 319bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman/// which has an opcode which directly corresponds to the given ISD opcode. 320bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman/// 32146510a73e977273ec67747eb34cbdb43f815e451Dan Gohmanbool FastISel::SelectBinaryOp(const User *I, unsigned ISDOpcode) { 322e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT VT = EVT::getEVT(I->getType(), /*HandleUnknown=*/true); 323825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson if (VT == MVT::Other || !VT.isSimple()) 324d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman // Unhandled type. Halt "fast" selection and bail. 325d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman return false; 326638c6830c6d0d6871065d2b00178ee4aa7d4d044Dan Gohman 327b71fea248fd7cf9ab2c5737997a3dc5682948dc4Dan Gohman // We only handle legal types. For example, on x86-32 the instruction 328b71fea248fd7cf9ab2c5737997a3dc5682948dc4Dan Gohman // selector contains all of the 64-bit instructions from x86-64, 329b71fea248fd7cf9ab2c5737997a3dc5682948dc4Dan Gohman // under the assumption that i64 won't be used if the target doesn't 330b71fea248fd7cf9ab2c5737997a3dc5682948dc4Dan Gohman // support it. 331638c6830c6d0d6871065d2b00178ee4aa7d4d044Dan Gohman if (!TLI.isTypeLegal(VT)) { 332825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson // MVT::i1 is special. Allow AND, OR, or XOR because they 333638c6830c6d0d6871065d2b00178ee4aa7d4d044Dan Gohman // don't require additional zeroing, which makes them easy. 334825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson if (VT == MVT::i1 && 3355dd9c2e9aea7294c184609aff7f2fe82eaea4eb0Dan Gohman (ISDOpcode == ISD::AND || ISDOpcode == ISD::OR || 3365dd9c2e9aea7294c184609aff7f2fe82eaea4eb0Dan Gohman ISDOpcode == ISD::XOR)) 33723b9b19b1a5a00faa9fce0788155c7dbfd00bfb1Owen Anderson VT = TLI.getTypeToTransformTo(I->getContext(), VT); 338638c6830c6d0d6871065d2b00178ee4aa7d4d044Dan Gohman else 339638c6830c6d0d6871065d2b00178ee4aa7d4d044Dan Gohman return false; 340638c6830c6d0d6871065d2b00178ee4aa7d4d044Dan Gohman } 341d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman 342fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner // Check if the first operand is a constant, and handle it as "ri". At -O0, 343fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner // we don't have anything that canonicalizes operand order. 344fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner if (ConstantInt *CI = dyn_cast<ConstantInt>(I->getOperand(0))) 345fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner if (isa<Instruction>(I) && cast<Instruction>(I)->isCommutative()) { 346fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner unsigned Op1 = getRegForValue(I->getOperand(1)); 347fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner if (Op1 == 0) return false; 348fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner 349fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner bool Op1IsKill = hasTrivialKill(I->getOperand(1)); 350d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 351602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner unsigned ResultReg = FastEmit_ri_(VT.getSimpleVT(), ISDOpcode, Op1, 352602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner Op1IsKill, CI->getZExtValue(), 353602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner VT.getSimpleVT()); 354602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner if (ResultReg == 0) return false; 355d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 356602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner // We successfully emitted code for the given LLVM Instruction. 357602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner UpdateValueMap(I, ResultReg); 358602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner return true; 359fff65b354f9895f5add84d99e0f62176f5d3f0f6Chris Lattner } 360d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 361d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 3623df24e667f04a7003342b534310919abc9c87418Dan Gohman unsigned Op0 = getRegForValue(I->getOperand(0)); 363602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner if (Op0 == 0) // Unhandled operand. Halt "fast" selection and bail. 364a7f2dff98e68ed8b2ac32f953768c04f26b52beaDan Gohman return false; 365a7f2dff98e68ed8b2ac32f953768c04f26b52beaDan Gohman 366a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman bool Op0IsKill = hasTrivialKill(I->getOperand(0)); 367a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman 368d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman // Check if the second operand is a constant and handle it appropriately. 369d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman if (ConstantInt *CI = dyn_cast<ConstantInt>(I->getOperand(1))) { 370602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner uint64_t Imm = CI->getZExtValue(); 371d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 372f051c1a29dd040b4b5ca0c5696d47a9058f87481Chris Lattner // Transform "sdiv exact X, 8" -> "sra X, 3". 373f051c1a29dd040b4b5ca0c5696d47a9058f87481Chris Lattner if (ISDOpcode == ISD::SDIV && isa<BinaryOperator>(I) && 374f051c1a29dd040b4b5ca0c5696d47a9058f87481Chris Lattner cast<BinaryOperator>(I)->isExact() && 375f051c1a29dd040b4b5ca0c5696d47a9058f87481Chris Lattner isPowerOf2_64(Imm)) { 376f051c1a29dd040b4b5ca0c5696d47a9058f87481Chris Lattner Imm = Log2_64(Imm); 377f051c1a29dd040b4b5ca0c5696d47a9058f87481Chris Lattner ISDOpcode = ISD::SRA; 378f051c1a29dd040b4b5ca0c5696d47a9058f87481Chris Lattner } 379d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 380602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner unsigned ResultReg = FastEmit_ri_(VT.getSimpleVT(), ISDOpcode, Op0, 381602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner Op0IsKill, Imm, VT.getSimpleVT()); 382602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner if (ResultReg == 0) return false; 383d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 384602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner // We successfully emitted code for the given LLVM Instruction. 385602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner UpdateValueMap(I, ResultReg); 386602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner return true; 387d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman } 388d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman 38910df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman // Check if the second operand is a constant float. 39010df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman if (ConstantFP *CF = dyn_cast<ConstantFP>(I->getOperand(1))) { 391ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman unsigned ResultReg = FastEmit_rf(VT.getSimpleVT(), VT.getSimpleVT(), 392a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman ISDOpcode, Op0, Op0IsKill, CF); 393ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman if (ResultReg != 0) { 394ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman // We successfully emitted code for the given LLVM Instruction. 3953df24e667f04a7003342b534310919abc9c87418Dan Gohman UpdateValueMap(I, ResultReg); 396ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman return true; 397ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman } 39810df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman } 39910df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman 4003df24e667f04a7003342b534310919abc9c87418Dan Gohman unsigned Op1 = getRegForValue(I->getOperand(1)); 401d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman if (Op1 == 0) 402d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman // Unhandled operand. Halt "fast" selection and bail. 403bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman return false; 404bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman 405a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman bool Op1IsKill = hasTrivialKill(I->getOperand(1)); 406a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman 407ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman // Now we have both operands in registers. Emit the instruction. 4080f84e4e31009eecf2dfcbe6113b65d0919f30254Owen Anderson unsigned ResultReg = FastEmit_rr(VT.getSimpleVT(), VT.getSimpleVT(), 409a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman ISDOpcode, 410a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman Op0, Op0IsKill, 411a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman Op1, Op1IsKill); 412bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman if (ResultReg == 0) 413bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman // Target-specific code wasn't able to find a machine opcode for 414bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman // the given ISD opcode and type. Halt "fast" selection and bail. 415bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman return false; 416bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman 4178014e865800cc911697a4c0c42f077df9fcc9805Dan Gohman // We successfully emitted code for the given LLVM Instruction. 4183df24e667f04a7003342b534310919abc9c87418Dan Gohman UpdateValueMap(I, ResultReg); 419bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman return true; 420bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman} 421bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman 42246510a73e977273ec67747eb34cbdb43f815e451Dan Gohmanbool FastISel::SelectGetElementPtr(const User *I) { 4233df24e667f04a7003342b534310919abc9c87418Dan Gohman unsigned N = getRegForValue(I->getOperand(0)); 42483785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng if (N == 0) 42583785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // Unhandled operand. Halt "fast" selection and bail. 42683785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng return false; 42783785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng 428a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman bool NIsKill = hasTrivialKill(I->getOperand(0)); 429a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman 430db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner Type *Ty = I->getOperand(0)->getType(); 431825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson MVT VT = TLI.getPointerTy(); 43246510a73e977273ec67747eb34cbdb43f815e451Dan Gohman for (GetElementPtrInst::const_op_iterator OI = I->op_begin()+1, 43346510a73e977273ec67747eb34cbdb43f815e451Dan Gohman E = I->op_end(); OI != E; ++OI) { 43446510a73e977273ec67747eb34cbdb43f815e451Dan Gohman const Value *Idx = *OI; 435db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner if (StructType *StTy = dyn_cast<StructType>(Ty)) { 43683785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng unsigned Field = cast<ConstantInt>(Idx)->getZExtValue(); 43783785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng if (Field) { 43883785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // N = N + Offset 43983785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng uint64_t Offs = TD.getStructLayout(StTy)->getElementOffset(Field); 44083785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // FIXME: This can be optimized by combining the add with a 44183785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // subsequent one. 442a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman N = FastEmit_ri_(VT, ISD::ADD, N, NIsKill, Offs, VT); 44383785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng if (N == 0) 44483785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // Unhandled operand. Halt "fast" selection and bail. 44583785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng return false; 446a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman NIsKill = true; 44783785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng } 44883785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng Ty = StTy->getElementType(Field); 44983785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng } else { 45083785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng Ty = cast<SequentialType>(Ty)->getElementType(); 45183785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng 45283785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // If this is a constant subscript, handle it quickly. 45346510a73e977273ec67747eb34cbdb43f815e451Dan Gohman if (const ConstantInt *CI = dyn_cast<ConstantInt>(Idx)) { 454e368b460a206fafa0d31d5d059b1779b94f7df8cDan Gohman if (CI->isZero()) continue; 455bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck uint64_t Offs = 456777d2306b36816a53bc1ae1244c0dc7d998ae691Duncan Sands TD.getTypeAllocSize(Ty)*cast<ConstantInt>(CI)->getSExtValue(); 457a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman N = FastEmit_ri_(VT, ISD::ADD, N, NIsKill, Offs, VT); 45883785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng if (N == 0) 45983785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // Unhandled operand. Halt "fast" selection and bail. 46083785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng return false; 461a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman NIsKill = true; 46283785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng continue; 46383785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng } 464bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 46583785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // N = N + Idx * ElementSize; 466777d2306b36816a53bc1ae1244c0dc7d998ae691Duncan Sands uint64_t ElementSize = TD.getTypeAllocSize(Ty); 467a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman std::pair<unsigned, bool> Pair = getRegForGEPIndex(Idx); 468a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned IdxN = Pair.first; 469a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman bool IdxNIsKill = Pair.second; 47083785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng if (IdxN == 0) 47183785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // Unhandled operand. Halt "fast" selection and bail. 47283785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng return false; 47383785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng 47480bc6e2243b7ae99da42bf2e61df4ebccf8d8821Dan Gohman if (ElementSize != 1) { 475a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IdxN = FastEmit_ri_(VT, ISD::MUL, IdxN, IdxNIsKill, ElementSize, VT); 47680bc6e2243b7ae99da42bf2e61df4ebccf8d8821Dan Gohman if (IdxN == 0) 47780bc6e2243b7ae99da42bf2e61df4ebccf8d8821Dan Gohman // Unhandled operand. Halt "fast" selection and bail. 47880bc6e2243b7ae99da42bf2e61df4ebccf8d8821Dan Gohman return false; 479a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IdxNIsKill = true; 48080bc6e2243b7ae99da42bf2e61df4ebccf8d8821Dan Gohman } 481a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman N = FastEmit_rr(VT, VT, ISD::ADD, N, NIsKill, IdxN, IdxNIsKill); 48283785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng if (N == 0) 48383785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // Unhandled operand. Halt "fast" selection and bail. 48483785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng return false; 48583785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng } 48683785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng } 48783785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng 48883785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // We successfully emitted code for the given LLVM Instruction. 4893df24e667f04a7003342b534310919abc9c87418Dan Gohman UpdateValueMap(I, N); 49083785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng return true; 491bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman} 492bdedd4477331b3b0d28d74658baf05f675f2d195Dan Gohman 49346510a73e977273ec67747eb34cbdb43f815e451Dan Gohmanbool FastISel::SelectCall(const User *I) { 494a61e73bda5125c28e48b52e573d115370838596bDan Gohman const CallInst *Call = cast<CallInst>(I); 495a61e73bda5125c28e48b52e573d115370838596bDan Gohman 496a61e73bda5125c28e48b52e573d115370838596bDan Gohman // Handle simple inline asms. 497a61e73bda5125c28e48b52e573d115370838596bDan Gohman if (const InlineAsm *IA = dyn_cast<InlineAsm>(Call->getArgOperand(0))) { 498a61e73bda5125c28e48b52e573d115370838596bDan Gohman // Don't attempt to handle constraints. 499a61e73bda5125c28e48b52e573d115370838596bDan Gohman if (!IA->getConstraintString().empty()) 500a61e73bda5125c28e48b52e573d115370838596bDan Gohman return false; 501a61e73bda5125c28e48b52e573d115370838596bDan Gohman 502a61e73bda5125c28e48b52e573d115370838596bDan Gohman unsigned ExtraInfo = 0; 503a61e73bda5125c28e48b52e573d115370838596bDan Gohman if (IA->hasSideEffects()) 504a61e73bda5125c28e48b52e573d115370838596bDan Gohman ExtraInfo |= InlineAsm::Extra_HasSideEffects; 505a61e73bda5125c28e48b52e573d115370838596bDan Gohman if (IA->isAlignStack()) 506a61e73bda5125c28e48b52e573d115370838596bDan Gohman ExtraInfo |= InlineAsm::Extra_IsAlignStack; 507a61e73bda5125c28e48b52e573d115370838596bDan Gohman 508a61e73bda5125c28e48b52e573d115370838596bDan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, 509a61e73bda5125c28e48b52e573d115370838596bDan Gohman TII.get(TargetOpcode::INLINEASM)) 510a61e73bda5125c28e48b52e573d115370838596bDan Gohman .addExternalSymbol(IA->getAsmString().c_str()) 511a61e73bda5125c28e48b52e573d115370838596bDan Gohman .addImm(ExtraInfo); 512a61e73bda5125c28e48b52e573d115370838596bDan Gohman return true; 513a61e73bda5125c28e48b52e573d115370838596bDan Gohman } 514a61e73bda5125c28e48b52e573d115370838596bDan Gohman 515a61e73bda5125c28e48b52e573d115370838596bDan Gohman const Function *F = Call->getCalledFunction(); 51633134c4a75558288d663267c8991f6bd37a530afDan Gohman if (!F) return false; 51733134c4a75558288d663267c8991f6bd37a530afDan Gohman 5184183e31978146ea529a87a2fc47b96aeb6cbe000Dan Gohman // Handle selected intrinsic function calls. 519832e4943598d821687cec79f512803c1ca03cff7Chris Lattner switch (F->getIntrinsicID()) { 52033134c4a75558288d663267c8991f6bd37a530afDan Gohman default: break; 52192c1e126473dfa93eeb4c9a124af4fedb40f0d5bBill Wendling case Intrinsic::dbg_declare: { 522a61e73bda5125c28e48b52e573d115370838596bDan Gohman const DbgDeclareInst *DI = cast<DbgDeclareInst>(Call); 52302f0dbd97a9bc01528aa12c2f260d928683ab411Devang Patel if (!DIVariable(DI->getVariable()).Verify() || 524a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman !FuncInfo.MF->getMMI().hasDebugInfo()) 5257e1e31f467d87c834d8baf673929865907901313Devang Patel return true; 52692c1e126473dfa93eeb4c9a124af4fedb40f0d5bBill Wendling 52746510a73e977273ec67747eb34cbdb43f815e451Dan Gohman const Value *Address = DI->getAddress(); 5286fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel if (!Address || isa<UndefValue>(Address) || isa<AllocaInst>(Address)) 529dc9185657593b5c1db86cb95a04a68fc09194993Dale Johannesen return true; 5306fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel 5316fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel unsigned Reg = 0; 5326fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel unsigned Offset = 0; 5336fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel if (const Argument *Arg = dyn_cast<Argument>(Address)) { 5346fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel if (Arg->hasByValAttr()) { 5356fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel // Byval arguments' frame index is recorded during argument lowering. 5366fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel // Use this info directly. 5376fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel Offset = FuncInfo.getByValArgumentFrameIndex(Arg); 5386fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel if (Offset) 5396fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel Reg = TRI.getFrameRegister(*FuncInfo.MF); 540bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck } 5414bafda9618f9dfa9edc8da08bb3001ef2d1a9b68Devang Patel } 5426fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel if (!Reg) 5436fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel Reg = getRegForValue(Address); 544bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 5456fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel if (Reg) 546bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, 5476fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel TII.get(TargetOpcode::DBG_VALUE)) 5486fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel .addReg(Reg, RegState::Debug).addImm(Offset) 5496fe75aaaeb6b0587d402228ba291c729a13eb6d7Devang Patel .addMetadata(DI->getVariable()); 55033134c4a75558288d663267c8991f6bd37a530afDan Gohman return true; 55192c1e126473dfa93eeb4c9a124af4fedb40f0d5bBill Wendling } 55245df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen case Intrinsic::dbg_value: { 553343b42e428079363ab09828734b2debfd7dbdc9eDale Johannesen // This form of DBG_VALUE is target-independent. 554a61e73bda5125c28e48b52e573d115370838596bDan Gohman const DbgValueInst *DI = cast<DbgValueInst>(Call); 555e837dead3c8dc3445ef6a0e2322179c57e264a13Evan Cheng const MCInstrDesc &II = TII.get(TargetOpcode::DBG_VALUE); 55646510a73e977273ec67747eb34cbdb43f815e451Dan Gohman const Value *V = DI->getValue(); 55745df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen if (!V) { 55845df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen // Currently the optimizer can produce this; insert an undef to 55945df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen // help debugging. Probably the optimizer should not do this. 56084023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 56184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman .addReg(0U).addImm(DI->getOffset()) 56284023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman .addMetadata(DI->getVariable()); 56346510a73e977273ec67747eb34cbdb43f815e451Dan Gohman } else if (const ConstantInt *CI = dyn_cast<ConstantInt>(V)) { 5648594d429e02c688d428036f8563f09572da3fbffDevang Patel if (CI->getBitWidth() > 64) 5658594d429e02c688d428036f8563f09572da3fbffDevang Patel BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 5668594d429e02c688d428036f8563f09572da3fbffDevang Patel .addCImm(CI).addImm(DI->getOffset()) 5678594d429e02c688d428036f8563f09572da3fbffDevang Patel .addMetadata(DI->getVariable()); 5688594d429e02c688d428036f8563f09572da3fbffDevang Patel else 5698594d429e02c688d428036f8563f09572da3fbffDevang Patel BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 5708594d429e02c688d428036f8563f09572da3fbffDevang Patel .addImm(CI->getZExtValue()).addImm(DI->getOffset()) 5718594d429e02c688d428036f8563f09572da3fbffDevang Patel .addMetadata(DI->getVariable()); 57246510a73e977273ec67747eb34cbdb43f815e451Dan Gohman } else if (const ConstantFP *CF = dyn_cast<ConstantFP>(V)) { 57384023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 57484023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman .addFPImm(CF).addImm(DI->getOffset()) 57584023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman .addMetadata(DI->getVariable()); 57645df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen } else if (unsigned Reg = lookUpRegForValue(V)) { 57784023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 57884023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman .addReg(Reg, RegState::Debug).addImm(DI->getOffset()) 57984023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman .addMetadata(DI->getVariable()); 58045df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen } else { 58145df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen // We can't yet handle anything else here because it would require 58245df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen // generating code, thus altering codegen because of debug info. 583afeaae7a940ce16e7874af31f3e5e91d8ca89e19Devang Patel DEBUG(dbgs() << "Dropping debug info for " << DI); 584bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck } 58545df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen return true; 58645df7616528e3d101c5b2938bd4d865321205d33Dale Johannesen } 587dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman case Intrinsic::eh_exception: { 588a61e73bda5125c28e48b52e573d115370838596bDan Gohman EVT VT = TLI.getValueType(Call->getType()); 589832e4943598d821687cec79f512803c1ca03cff7Chris Lattner if (TLI.getOperationAction(ISD::EXCEPTIONADDR, VT)!=TargetLowering::Expand) 590832e4943598d821687cec79f512803c1ca03cff7Chris Lattner break; 591d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 592832e4943598d821687cec79f512803c1ca03cff7Chris Lattner assert(FuncInfo.MBB->isLandingPad() && 593832e4943598d821687cec79f512803c1ca03cff7Chris Lattner "Call to eh.exception not in landing pad!"); 594832e4943598d821687cec79f512803c1ca03cff7Chris Lattner unsigned Reg = TLI.getExceptionAddressRegister(); 595832e4943598d821687cec79f512803c1ca03cff7Chris Lattner const TargetRegisterClass *RC = TLI.getRegClassFor(VT); 596832e4943598d821687cec79f512803c1ca03cff7Chris Lattner unsigned ResultReg = createResultReg(RC); 597832e4943598d821687cec79f512803c1ca03cff7Chris Lattner BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 598832e4943598d821687cec79f512803c1ca03cff7Chris Lattner ResultReg).addReg(Reg); 599a61e73bda5125c28e48b52e573d115370838596bDan Gohman UpdateValueMap(Call, ResultReg); 600832e4943598d821687cec79f512803c1ca03cff7Chris Lattner return true; 601dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman } 602b01bbdcc1af27bd90b552bb1b62b48916e0d4be3Duncan Sands case Intrinsic::eh_selector: { 603a61e73bda5125c28e48b52e573d115370838596bDan Gohman EVT VT = TLI.getValueType(Call->getType()); 604832e4943598d821687cec79f512803c1ca03cff7Chris Lattner if (TLI.getOperationAction(ISD::EHSELECTION, VT) != TargetLowering::Expand) 605832e4943598d821687cec79f512803c1ca03cff7Chris Lattner break; 606832e4943598d821687cec79f512803c1ca03cff7Chris Lattner if (FuncInfo.MBB->isLandingPad()) 607a61e73bda5125c28e48b52e573d115370838596bDan Gohman AddCatchInfo(*Call, &FuncInfo.MF->getMMI(), FuncInfo.MBB); 608832e4943598d821687cec79f512803c1ca03cff7Chris Lattner else { 609dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman#ifndef NDEBUG 610a61e73bda5125c28e48b52e573d115370838596bDan Gohman FuncInfo.CatchInfoLost.insert(Call); 611dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman#endif 612832e4943598d821687cec79f512803c1ca03cff7Chris Lattner // FIXME: Mark exception selector register as live in. Hack for PR1508. 613ed3a8067a60ecf2c215e77327a57904c3ebc3355Chris Lattner unsigned Reg = TLI.getExceptionSelectorRegister(); 614832e4943598d821687cec79f512803c1ca03cff7Chris Lattner if (Reg) FuncInfo.MBB->addLiveIn(Reg); 615832e4943598d821687cec79f512803c1ca03cff7Chris Lattner } 616ed3a8067a60ecf2c215e77327a57904c3ebc3355Chris Lattner 617832e4943598d821687cec79f512803c1ca03cff7Chris Lattner unsigned Reg = TLI.getExceptionSelectorRegister(); 618832e4943598d821687cec79f512803c1ca03cff7Chris Lattner EVT SrcVT = TLI.getPointerTy(); 619832e4943598d821687cec79f512803c1ca03cff7Chris Lattner const TargetRegisterClass *RC = TLI.getRegClassFor(SrcVT); 620832e4943598d821687cec79f512803c1ca03cff7Chris Lattner unsigned ResultReg = createResultReg(RC); 621832e4943598d821687cec79f512803c1ca03cff7Chris Lattner BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 622832e4943598d821687cec79f512803c1ca03cff7Chris Lattner ResultReg).addReg(Reg); 623832e4943598d821687cec79f512803c1ca03cff7Chris Lattner 624a61e73bda5125c28e48b52e573d115370838596bDan Gohman bool ResultRegIsKill = hasTrivialKill(Call); 625832e4943598d821687cec79f512803c1ca03cff7Chris Lattner 626832e4943598d821687cec79f512803c1ca03cff7Chris Lattner // Cast the register to the type of the selector. 627832e4943598d821687cec79f512803c1ca03cff7Chris Lattner if (SrcVT.bitsGT(MVT::i32)) 628832e4943598d821687cec79f512803c1ca03cff7Chris Lattner ResultReg = FastEmit_r(SrcVT.getSimpleVT(), MVT::i32, ISD::TRUNCATE, 629832e4943598d821687cec79f512803c1ca03cff7Chris Lattner ResultReg, ResultRegIsKill); 630832e4943598d821687cec79f512803c1ca03cff7Chris Lattner else if (SrcVT.bitsLT(MVT::i32)) 631832e4943598d821687cec79f512803c1ca03cff7Chris Lattner ResultReg = FastEmit_r(SrcVT.getSimpleVT(), MVT::i32, 632832e4943598d821687cec79f512803c1ca03cff7Chris Lattner ISD::SIGN_EXTEND, ResultReg, ResultRegIsKill); 633832e4943598d821687cec79f512803c1ca03cff7Chris Lattner if (ResultReg == 0) 634832e4943598d821687cec79f512803c1ca03cff7Chris Lattner // Unhandled operand. Halt "fast" selection and bail. 635832e4943598d821687cec79f512803c1ca03cff7Chris Lattner return false; 636ed3a8067a60ecf2c215e77327a57904c3ebc3355Chris Lattner 637a61e73bda5125c28e48b52e573d115370838596bDan Gohman UpdateValueMap(Call, ResultReg); 638832e4943598d821687cec79f512803c1ca03cff7Chris Lattner 639832e4943598d821687cec79f512803c1ca03cff7Chris Lattner return true; 640dd5b58ad7be78be90390074f0df138778af5c895Dan Gohman } 641d0118a2371f35faa6af97e67be69e1debc615c42Eli Friedman case Intrinsic::objectsize: { 642d0118a2371f35faa6af97e67be69e1debc615c42Eli Friedman ConstantInt *CI = cast<ConstantInt>(Call->getArgOperand(1)); 643d0118a2371f35faa6af97e67be69e1debc615c42Eli Friedman unsigned long long Res = CI->isZero() ? -1ULL : 0; 644d0118a2371f35faa6af97e67be69e1debc615c42Eli Friedman Constant *ResCI = ConstantInt::get(Call->getType(), Res); 645d0118a2371f35faa6af97e67be69e1debc615c42Eli Friedman unsigned ResultReg = getRegForValue(ResCI); 646d0118a2371f35faa6af97e67be69e1debc615c42Eli Friedman if (ResultReg == 0) 647d0118a2371f35faa6af97e67be69e1debc615c42Eli Friedman return false; 648d0118a2371f35faa6af97e67be69e1debc615c42Eli Friedman UpdateValueMap(Call, ResultReg); 649d0118a2371f35faa6af97e67be69e1debc615c42Eli Friedman return true; 650d0118a2371f35faa6af97e67be69e1debc615c42Eli Friedman } 65133134c4a75558288d663267c8991f6bd37a530afDan Gohman } 6524183e31978146ea529a87a2fc47b96aeb6cbe000Dan Gohman 65374af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin // Usually, it does not make sense to initialize a value, 65474af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin // make an unrelated function call and use the value, because 65574af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin // it tends to be spilled on the stack. So, we move the pointer 65674af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin // to the last local value to the beginning of the block, so that 65774af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin // all the values which have already been materialized, 65874af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin // appear after the call. It also makes sense to skip intrinsics 65974af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin // since they tend to be inlined. 66074af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin if (!isa<IntrinsicInst>(F)) 66174af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin flushLocalValueMap(); 66274af88a6661ad5185924bf39164fb4aa144d32cfIvan Krasin 6634183e31978146ea529a87a2fc47b96aeb6cbe000Dan Gohman // An arbitrary call. Bail. 66433134c4a75558288d663267c8991f6bd37a530afDan Gohman return false; 66533134c4a75558288d663267c8991f6bd37a530afDan Gohman} 66633134c4a75558288d663267c8991f6bd37a530afDan Gohman 66746510a73e977273ec67747eb34cbdb43f815e451Dan Gohmanbool FastISel::SelectCast(const User *I, unsigned Opcode) { 668e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT SrcVT = TLI.getValueType(I->getOperand(0)->getType()); 669e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT DstVT = TLI.getValueType(I->getType()); 670bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 671825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson if (SrcVT == MVT::Other || !SrcVT.isSimple() || 672825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson DstVT == MVT::Other || !DstVT.isSimple()) 673d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson // Unhandled type. Halt "fast" selection and bail. 674d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson return false; 675bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 67676927d7303046058c627691bd45d6bff608f49f4Eli Friedman // Check if the destination type is legal. 677474d3b3f40e117a66946e9fb9d2016b4c05caef0Dan Gohman if (!TLI.isTypeLegal(DstVT)) 67876927d7303046058c627691bd45d6bff608f49f4Eli Friedman return false; 679474d3b3f40e117a66946e9fb9d2016b4c05caef0Dan Gohman 68076927d7303046058c627691bd45d6bff608f49f4Eli Friedman // Check if the source operand is legal. 681474d3b3f40e117a66946e9fb9d2016b4c05caef0Dan Gohman if (!TLI.isTypeLegal(SrcVT)) 68276927d7303046058c627691bd45d6bff608f49f4Eli Friedman return false; 683474d3b3f40e117a66946e9fb9d2016b4c05caef0Dan Gohman 6843df24e667f04a7003342b534310919abc9c87418Dan Gohman unsigned InputReg = getRegForValue(I->getOperand(0)); 685d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson if (!InputReg) 686d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson // Unhandled operand. Halt "fast" selection and bail. 687d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson return false; 68814ea1ec2324cb595f2e035bbf54ddcd483f17c11Dan Gohman 689a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman bool InputRegIsKill = hasTrivialKill(I->getOperand(0)); 690a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman 691d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson unsigned ResultReg = FastEmit_r(SrcVT.getSimpleVT(), 692d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson DstVT.getSimpleVT(), 693d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson Opcode, 694a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman InputReg, InputRegIsKill); 695d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson if (!ResultReg) 696d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson return false; 697bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 6983df24e667f04a7003342b534310919abc9c87418Dan Gohman UpdateValueMap(I, ResultReg); 699d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson return true; 700d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson} 701d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson 70246510a73e977273ec67747eb34cbdb43f815e451Dan Gohmanbool FastISel::SelectBitCast(const User *I) { 703ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman // If the bitcast doesn't change the type, just use the operand value. 704ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman if (I->getType() == I->getOperand(0)->getType()) { 7053df24e667f04a7003342b534310919abc9c87418Dan Gohman unsigned Reg = getRegForValue(I->getOperand(0)); 706a318dabc0edbcc7a2b54d99b026a093361ec14fcDan Gohman if (Reg == 0) 707a318dabc0edbcc7a2b54d99b026a093361ec14fcDan Gohman return false; 7083df24e667f04a7003342b534310919abc9c87418Dan Gohman UpdateValueMap(I, Reg); 709ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman return true; 710ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman } 711ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman 712bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck // Bitcasts of other values become reg-reg copies or BITCAST operators. 713e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT SrcVT = TLI.getValueType(I->getOperand(0)->getType()); 714e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT DstVT = TLI.getValueType(I->getType()); 715bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 716825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson if (SrcVT == MVT::Other || !SrcVT.isSimple() || 717825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Anderson DstVT == MVT::Other || !DstVT.isSimple() || 718d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson !TLI.isTypeLegal(SrcVT) || !TLI.isTypeLegal(DstVT)) 719d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson // Unhandled type. Halt "fast" selection and bail. 720d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson return false; 721bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 7223df24e667f04a7003342b534310919abc9c87418Dan Gohman unsigned Op0 = getRegForValue(I->getOperand(0)); 723ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman if (Op0 == 0) 724ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman // Unhandled operand. Halt "fast" selection and bail. 725d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson return false; 726a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman 727a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman bool Op0IsKill = hasTrivialKill(I->getOperand(0)); 728bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 729ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman // First, try to perform the bitcast by inserting a reg-reg copy. 730ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman unsigned ResultReg = 0; 731ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman if (SrcVT.getSimpleVT() == DstVT.getSimpleVT()) { 732ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman TargetRegisterClass* SrcClass = TLI.getRegClassFor(SrcVT); 733ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman TargetRegisterClass* DstClass = TLI.getRegClassFor(DstVT); 734e7917bb207d5178dfb26066f839e4c295fd3a1ebJakob Stoklund Olesen // Don't attempt a cross-class copy. It will likely fail. 735e7917bb207d5178dfb26066f839e4c295fd3a1ebJakob Stoklund Olesen if (SrcClass == DstClass) { 736e7917bb207d5178dfb26066f839e4c295fd3a1ebJakob Stoklund Olesen ResultReg = createResultReg(DstClass); 737e7917bb207d5178dfb26066f839e4c295fd3a1ebJakob Stoklund Olesen BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 738e7917bb207d5178dfb26066f839e4c295fd3a1ebJakob Stoklund Olesen ResultReg).addReg(Op0); 739e7917bb207d5178dfb26066f839e4c295fd3a1ebJakob Stoklund Olesen } 740ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman } 741bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 742bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck // If the reg-reg copy failed, select a BITCAST opcode. 743ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman if (!ResultReg) 744ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman ResultReg = FastEmit_r(SrcVT.getSimpleVT(), DstVT.getSimpleVT(), 745bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck ISD::BITCAST, Op0, Op0IsKill); 746bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 747ad368ac2b5f303050e9aaa357e2b806fae38f81bDan Gohman if (!ResultReg) 748d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson return false; 749bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 7503df24e667f04a7003342b534310919abc9c87418Dan Gohman UpdateValueMap(I, ResultReg); 751d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson return true; 752d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson} 753d0533c9998d3baf41848ba559a9b2f2c65296d14Owen Anderson 7543df24e667f04a7003342b534310919abc9c87418Dan Gohmanbool 75546510a73e977273ec67747eb34cbdb43f815e451Dan GohmanFastISel::SelectInstruction(const Instruction *I) { 756e8c92dd439581bec7e3516cbdbea74e2e60fe7f0Dan Gohman // Just before the terminator instruction, insert instructions to 757e8c92dd439581bec7e3516cbdbea74e2e60fe7f0Dan Gohman // feed PHI nodes in successor blocks. 758e8c92dd439581bec7e3516cbdbea74e2e60fe7f0Dan Gohman if (isa<TerminatorInst>(I)) 759e8c92dd439581bec7e3516cbdbea74e2e60fe7f0Dan Gohman if (!HandlePHINodesInSuccessorBlocks(I->getParent())) 760e8c92dd439581bec7e3516cbdbea74e2e60fe7f0Dan Gohman return false; 761e8c92dd439581bec7e3516cbdbea74e2e60fe7f0Dan Gohman 7628ba3aa7f9c5048c31172788f98ad2b90ffad565aDan Gohman DL = I->getDebugLoc(); 7638ba3aa7f9c5048c31172788f98ad2b90ffad565aDan Gohman 7646e3ff375474c4fd78feb0b8463eb273a23cb4404Dan Gohman // First, try doing target-independent selection. 7658ba3aa7f9c5048c31172788f98ad2b90ffad565aDan Gohman if (SelectOperator(I, I->getOpcode())) { 7668ba3aa7f9c5048c31172788f98ad2b90ffad565aDan Gohman DL = DebugLoc(); 7676e3ff375474c4fd78feb0b8463eb273a23cb4404Dan Gohman return true; 7688ba3aa7f9c5048c31172788f98ad2b90ffad565aDan Gohman } 7696e3ff375474c4fd78feb0b8463eb273a23cb4404Dan Gohman 7706e3ff375474c4fd78feb0b8463eb273a23cb4404Dan Gohman // Next, try calling the target to attempt to handle the instruction. 7718ba3aa7f9c5048c31172788f98ad2b90ffad565aDan Gohman if (TargetSelectInstruction(I)) { 7728ba3aa7f9c5048c31172788f98ad2b90ffad565aDan Gohman DL = DebugLoc(); 7736e3ff375474c4fd78feb0b8463eb273a23cb4404Dan Gohman return true; 7748ba3aa7f9c5048c31172788f98ad2b90ffad565aDan Gohman } 7756e3ff375474c4fd78feb0b8463eb273a23cb4404Dan Gohman 7768ba3aa7f9c5048c31172788f98ad2b90ffad565aDan Gohman DL = DebugLoc(); 7776e3ff375474c4fd78feb0b8463eb273a23cb4404Dan Gohman return false; 77840b189e4e257924d90aaf63bf2e12bc7bbca961aDan Gohman} 77940b189e4e257924d90aaf63bf2e12bc7bbca961aDan Gohman 780d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohman/// FastEmitBranch - Emit an unconditional branch to the given block, 781d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohman/// unless it is the immediate (fall-through) successor, and update 782d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohman/// the CFG. 783d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohmanvoid 7843bf912593301152b65accb9d9c37a95172f1df5aStuart HastingsFastISel::FastEmitBranch(MachineBasicBlock *MSucc, DebugLoc DL) { 78584023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman if (FuncInfo.MBB->isLayoutSuccessor(MSucc)) { 786d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohman // The unconditional fall-through case, which needs no instructions. 787d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohman } else { 788d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohman // The unconditional branch case. 78984023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman TII.InsertBranch(*FuncInfo.MBB, MSucc, NULL, 79084023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman SmallVector<MachineOperand, 0>(), DL); 791d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohman } 79284023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman FuncInfo.MBB->addSuccessor(MSucc); 793d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohman} 794d98d6203e429b2d7208b6687931e9079e85e95ecDan Gohman 7953d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman/// SelectFNeg - Emit an FNeg operation. 7963d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman/// 7973d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohmanbool 79846510a73e977273ec67747eb34cbdb43f815e451Dan GohmanFastISel::SelectFNeg(const User *I) { 7993d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman unsigned OpReg = getRegForValue(BinaryOperator::getFNegArgument(I)); 8003d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman if (OpReg == 0) return false; 8013d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman 802a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman bool OpRegIsKill = hasTrivialKill(I); 803a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman 8044a215a13c3035a8818254b61267be77def4a2a37Dan Gohman // If the target has ISD::FNEG, use it. 8054a215a13c3035a8818254b61267be77def4a2a37Dan Gohman EVT VT = TLI.getValueType(I->getType()); 8064a215a13c3035a8818254b61267be77def4a2a37Dan Gohman unsigned ResultReg = FastEmit_r(VT.getSimpleVT(), VT.getSimpleVT(), 807a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman ISD::FNEG, OpReg, OpRegIsKill); 8084a215a13c3035a8818254b61267be77def4a2a37Dan Gohman if (ResultReg != 0) { 8094a215a13c3035a8818254b61267be77def4a2a37Dan Gohman UpdateValueMap(I, ResultReg); 8104a215a13c3035a8818254b61267be77def4a2a37Dan Gohman return true; 8114a215a13c3035a8818254b61267be77def4a2a37Dan Gohman } 8124a215a13c3035a8818254b61267be77def4a2a37Dan Gohman 8135e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman // Bitcast the value to integer, twiddle the sign bit with xor, 8145e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman // and then bitcast it back to floating-point. 8153d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman if (VT.getSizeInBits() > 64) return false; 8165e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman EVT IntVT = EVT::getIntegerVT(I->getContext(), VT.getSizeInBits()); 8175e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman if (!TLI.isTypeLegal(IntVT)) 8185e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman return false; 8195e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman 8205e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman unsigned IntReg = FastEmit_r(VT.getSimpleVT(), IntVT.getSimpleVT(), 821bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck ISD::BITCAST, OpReg, OpRegIsKill); 8225e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman if (IntReg == 0) 8235e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman return false; 8245e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman 825a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned IntResultReg = FastEmit_ri_(IntVT.getSimpleVT(), ISD::XOR, 826a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman IntReg, /*Kill=*/true, 8275e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman UINT64_C(1) << (VT.getSizeInBits()-1), 8285e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman IntVT.getSimpleVT()); 8295e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman if (IntResultReg == 0) 8305e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman return false; 8315e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman 8325e5abb77fe9eeb92a55f119fdb721bca4508094aDan Gohman ResultReg = FastEmit_r(IntVT.getSimpleVT(), VT.getSimpleVT(), 833bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck ISD::BITCAST, IntResultReg, /*Kill=*/true); 8343d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman if (ResultReg == 0) 8353d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman return false; 8363d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman 8373d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman UpdateValueMap(I, ResultReg); 8383d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman return true; 8393d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman} 8403d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman 84140b189e4e257924d90aaf63bf2e12bc7bbca961aDan Gohmanbool 8422586b8f9366aed5a1efa44d3f18d095511601642Eli FriedmanFastISel::SelectExtractValue(const User *U) { 8432586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman const ExtractValueInst *EVI = dyn_cast<ExtractValueInst>(U); 844a4c920db7a3620f365144eac9aaad7ca23062caaEli Friedman if (!EVI) 8452586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman return false; 8462586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman 847482feb33b2bba677d47bab859d9e1e95d67016bdEli Friedman // Make sure we only try to handle extracts with a legal result. But also 848482feb33b2bba677d47bab859d9e1e95d67016bdEli Friedman // allow i1 because it's easy. 8492586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman EVT RealVT = TLI.getValueType(EVI->getType(), /*AllowUnknown=*/true); 8502586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman if (!RealVT.isSimple()) 8512586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman return false; 8522586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman MVT VT = RealVT.getSimpleVT(); 853482feb33b2bba677d47bab859d9e1e95d67016bdEli Friedman if (!TLI.isTypeLegal(VT) && VT != MVT::i1) 8542586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman return false; 8552586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman 8562586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman const Value *Op0 = EVI->getOperand(0); 857db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner Type *AggTy = Op0->getType(); 8582586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman 8592586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman // Get the base result register. 8602586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman unsigned ResultReg; 8612586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman DenseMap<const Value *, unsigned>::iterator I = FuncInfo.ValueMap.find(Op0); 8622586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman if (I != FuncInfo.ValueMap.end()) 8632586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman ResultReg = I->second; 8640b4d96baecf3fe6af0fd45ba815bacf91a017f97Eli Friedman else if (isa<Instruction>(Op0)) 8652586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman ResultReg = FuncInfo.InitializeRegForValue(Op0); 8660b4d96baecf3fe6af0fd45ba815bacf91a017f97Eli Friedman else 8670b4d96baecf3fe6af0fd45ba815bacf91a017f97Eli Friedman return false; // fast-isel can't handle aggregate constants at the moment 8682586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman 8692586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman // Get the actual result register, which is an offset from the base register. 870fc6d3a49867cd38954dc40936a88f1907252c6d2Jay Foad unsigned VTIndex = ComputeLinearIndex(AggTy, EVI->getIndices()); 8712586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman 8722586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman SmallVector<EVT, 4> AggValueVTs; 8732586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman ComputeValueVTs(TLI, AggTy, AggValueVTs); 8742586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman 8752586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman for (unsigned i = 0; i < VTIndex; i++) 8762586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman ResultReg += TLI.getNumRegisters(FuncInfo.Fn->getContext(), AggValueVTs[i]); 8772586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman 8782586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman UpdateValueMap(EVI, ResultReg); 8792586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman return true; 8802586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman} 8812586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman 8822586b8f9366aed5a1efa44d3f18d095511601642Eli Friedmanbool 88346510a73e977273ec67747eb34cbdb43f815e451Dan GohmanFastISel::SelectOperator(const User *I, unsigned Opcode) { 88440b189e4e257924d90aaf63bf2e12bc7bbca961aDan Gohman switch (Opcode) { 885ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman case Instruction::Add: 886ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman return SelectBinaryOp(I, ISD::ADD); 887ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman case Instruction::FAdd: 888ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman return SelectBinaryOp(I, ISD::FADD); 889ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman case Instruction::Sub: 890ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman return SelectBinaryOp(I, ISD::SUB); 891ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman case Instruction::FSub: 8923d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman // FNeg is currently represented in LLVM IR as a special case of FSub. 8933d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman if (BinaryOperator::isFNeg(I)) 8943d45a853db014fdddcdb79424e663dfed5eccbc7Dan Gohman return SelectFNeg(I); 895ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman return SelectBinaryOp(I, ISD::FSUB); 896ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman case Instruction::Mul: 897ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman return SelectBinaryOp(I, ISD::MUL); 898ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman case Instruction::FMul: 899ae3a0be92e33bc716722aa600983fc1535acb122Dan Gohman return SelectBinaryOp(I, ISD::FMUL); 9003df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::SDiv: 9013df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::SDIV); 9023df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::UDiv: 9033df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::UDIV); 9043df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::FDiv: 9053df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::FDIV); 9063df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::SRem: 9073df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::SREM); 9083df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::URem: 9093df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::UREM); 9103df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::FRem: 9113df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::FREM); 9123df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::Shl: 9133df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::SHL); 9143df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::LShr: 9153df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::SRL); 9163df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::AShr: 9173df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::SRA); 9183df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::And: 9193df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::AND); 9203df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::Or: 9213df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::OR); 9223df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::Xor: 9233df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBinaryOp(I, ISD::XOR); 9243df24e667f04a7003342b534310919abc9c87418Dan Gohman 9253df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::GetElementPtr: 9263df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectGetElementPtr(I); 9273df24e667f04a7003342b534310919abc9c87418Dan Gohman 9283df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::Br: { 92946510a73e977273ec67747eb34cbdb43f815e451Dan Gohman const BranchInst *BI = cast<BranchInst>(I); 9303df24e667f04a7003342b534310919abc9c87418Dan Gohman 9313df24e667f04a7003342b534310919abc9c87418Dan Gohman if (BI->isUnconditional()) { 93246510a73e977273ec67747eb34cbdb43f815e451Dan Gohman const BasicBlock *LLVMSucc = BI->getSuccessor(0); 933a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman MachineBasicBlock *MSucc = FuncInfo.MBBMap[LLVMSucc]; 9343bf912593301152b65accb9d9c37a95172f1df5aStuart Hastings FastEmitBranch(MSucc, BI->getDebugLoc()); 9353df24e667f04a7003342b534310919abc9c87418Dan Gohman return true; 9369d5b41624003daf259b33fc953aa471049700353Owen Anderson } 9373df24e667f04a7003342b534310919abc9c87418Dan Gohman 9383df24e667f04a7003342b534310919abc9c87418Dan Gohman // Conditional branches are not handed yet. 9393df24e667f04a7003342b534310919abc9c87418Dan Gohman // Halt "fast" selection and bail. 9403df24e667f04a7003342b534310919abc9c87418Dan Gohman return false; 941b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman } 942b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 943087c8507e592bbbede1746f07bd44b28559e3684Dan Gohman case Instruction::Unreachable: 944087c8507e592bbbede1746f07bd44b28559e3684Dan Gohman // Nothing to emit. 945087c8507e592bbbede1746f07bd44b28559e3684Dan Gohman return true; 946087c8507e592bbbede1746f07bd44b28559e3684Dan Gohman 9470586d91bb3e516d5826826522d9a90ed6ef74d86Dan Gohman case Instruction::Alloca: 9480586d91bb3e516d5826826522d9a90ed6ef74d86Dan Gohman // FunctionLowering has the static-sized case covered. 949a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman if (FuncInfo.StaticAllocaMap.count(cast<AllocaInst>(I))) 9500586d91bb3e516d5826826522d9a90ed6ef74d86Dan Gohman return true; 9510586d91bb3e516d5826826522d9a90ed6ef74d86Dan Gohman 9520586d91bb3e516d5826826522d9a90ed6ef74d86Dan Gohman // Dynamic-sized alloca is not handled yet. 9530586d91bb3e516d5826826522d9a90ed6ef74d86Dan Gohman return false; 954bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 95533134c4a75558288d663267c8991f6bd37a530afDan Gohman case Instruction::Call: 95633134c4a75558288d663267c8991f6bd37a530afDan Gohman return SelectCall(I); 957bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 9583df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::BitCast: 9593df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectBitCast(I); 9603df24e667f04a7003342b534310919abc9c87418Dan Gohman 9613df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::FPToSI: 9623df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectCast(I, ISD::FP_TO_SINT); 9633df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::ZExt: 9643df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectCast(I, ISD::ZERO_EXTEND); 9653df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::SExt: 9663df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectCast(I, ISD::SIGN_EXTEND); 9673df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::Trunc: 9683df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectCast(I, ISD::TRUNCATE); 9693df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::SIToFP: 9703df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectCast(I, ISD::SINT_TO_FP); 9713df24e667f04a7003342b534310919abc9c87418Dan Gohman 9723df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::IntToPtr: // Deliberate fall-through. 9733df24e667f04a7003342b534310919abc9c87418Dan Gohman case Instruction::PtrToInt: { 974e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT SrcVT = TLI.getValueType(I->getOperand(0)->getType()); 975e50ed30282bb5b4a9ed952580523f2dda16215acOwen Anderson EVT DstVT = TLI.getValueType(I->getType()); 9763df24e667f04a7003342b534310919abc9c87418Dan Gohman if (DstVT.bitsGT(SrcVT)) 9773df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectCast(I, ISD::ZERO_EXTEND); 9783df24e667f04a7003342b534310919abc9c87418Dan Gohman if (DstVT.bitsLT(SrcVT)) 9793df24e667f04a7003342b534310919abc9c87418Dan Gohman return SelectCast(I, ISD::TRUNCATE); 9803df24e667f04a7003342b534310919abc9c87418Dan Gohman unsigned Reg = getRegForValue(I->getOperand(0)); 9813df24e667f04a7003342b534310919abc9c87418Dan Gohman if (Reg == 0) return false; 9823df24e667f04a7003342b534310919abc9c87418Dan Gohman UpdateValueMap(I, Reg); 9833df24e667f04a7003342b534310919abc9c87418Dan Gohman return true; 9843df24e667f04a7003342b534310919abc9c87418Dan Gohman } 985d57dd5f4e6740520820bc0fca42a540e31c27a73Dan Gohman 9862586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman case Instruction::ExtractValue: 9872586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman return SelectExtractValue(I); 9882586b8f9366aed5a1efa44d3f18d095511601642Eli Friedman 989ba5be5c07bb19dcf484e3aa40cd139dd07c10407Dan Gohman case Instruction::PHI: 990ba5be5c07bb19dcf484e3aa40cd139dd07c10407Dan Gohman llvm_unreachable("FastISel shouldn't visit PHI nodes!"); 991ba5be5c07bb19dcf484e3aa40cd139dd07c10407Dan Gohman 9923df24e667f04a7003342b534310919abc9c87418Dan Gohman default: 9933df24e667f04a7003342b534310919abc9c87418Dan Gohman // Unhandled instruction. Halt "fast" selection and bail. 9943df24e667f04a7003342b534310919abc9c87418Dan Gohman return false; 9953df24e667f04a7003342b534310919abc9c87418Dan Gohman } 996b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman} 997b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 998a4160c3434b08288d1f79f1acbe453d1b9610b22Dan GohmanFastISel::FastISel(FunctionLoweringInfo &funcInfo) 99984023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman : FuncInfo(funcInfo), 1000a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman MRI(FuncInfo.MF->getRegInfo()), 1001a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman MFI(*FuncInfo.MF->getFrameInfo()), 1002a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman MCP(*FuncInfo.MF->getConstantPool()), 1003a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman TM(FuncInfo.MF->getTarget()), 100422bb31103de3337f0bb74c7bee16d1817d4dca14Dan Gohman TD(*TM.getTargetData()), 100522bb31103de3337f0bb74c7bee16d1817d4dca14Dan Gohman TII(*TM.getInstrInfo()), 1006a7a0ed79012ea36f838239cf1d04959711aec2a9Dan Gohman TLI(*TM.getTargetLowering()), 100784023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman TRI(*TM.getRegisterInfo()) { 1008bb466331e7e50d03497ce40ee344870236fd9c32Dan Gohman} 1009bb466331e7e50d03497ce40ee344870236fd9c32Dan Gohman 1010e285a74f7cf9dd3ccf4fe758576cf83301f8a43eDan GohmanFastISel::~FastISel() {} 1011e285a74f7cf9dd3ccf4fe758576cf83301f8a43eDan Gohman 1012825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Andersonunsigned FastISel::FastEmit_(MVT, MVT, 10137c3ecb6838ef7a2ca306c0f3cd68022f0855ae71Dan Gohman unsigned) { 1014b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman return 0; 1015b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman} 1016b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 1017825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Andersonunsigned FastISel::FastEmit_r(MVT, MVT, 1018a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned, 1019a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned /*Op0*/, bool /*Op0IsKill*/) { 1020b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman return 0; 1021b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman} 1022b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 1023bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peckunsigned FastISel::FastEmit_rr(MVT, MVT, 1024a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned, 1025a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned /*Op0*/, bool /*Op0IsKill*/, 1026a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned /*Op1*/, bool /*Op1IsKill*/) { 1027b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman return 0; 1028b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman} 1029b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 10307c3ecb6838ef7a2ca306c0f3cd68022f0855ae71Dan Gohmanunsigned FastISel::FastEmit_i(MVT, MVT, unsigned, uint64_t /*Imm*/) { 103183785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng return 0; 103283785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng} 103383785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng 1034825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Andersonunsigned FastISel::FastEmit_f(MVT, MVT, 103546510a73e977273ec67747eb34cbdb43f815e451Dan Gohman unsigned, const ConstantFP * /*FPImm*/) { 103610df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman return 0; 103710df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman} 103810df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman 1039825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Andersonunsigned FastISel::FastEmit_ri(MVT, MVT, 1040a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned, 1041a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned /*Op0*/, bool /*Op0IsKill*/, 10420f84e4e31009eecf2dfcbe6113b65d0919f30254Owen Anderson uint64_t /*Imm*/) { 1043d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman return 0; 1044d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman} 1045d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman 1046825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Andersonunsigned FastISel::FastEmit_rf(MVT, MVT, 1047a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned, 1048a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned /*Op0*/, bool /*Op0IsKill*/, 104946510a73e977273ec67747eb34cbdb43f815e451Dan Gohman const ConstantFP * /*FPImm*/) { 105010df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman return 0; 105110df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman} 105210df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman 1053825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Andersonunsigned FastISel::FastEmit_rri(MVT, MVT, 10547c3ecb6838ef7a2ca306c0f3cd68022f0855ae71Dan Gohman unsigned, 1055a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned /*Op0*/, bool /*Op0IsKill*/, 1056a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned /*Op1*/, bool /*Op1IsKill*/, 1057d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman uint64_t /*Imm*/) { 105883785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng return 0; 105983785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng} 106083785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng 106183785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng/// FastEmit_ri_ - This method is a wrapper of FastEmit_ri. It first tries 106283785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng/// to emit an instruction with an immediate operand using FastEmit_ri. 106383785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng/// If that fails, it materializes the immediate into a register and try 106483785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng/// FastEmit_rr instead. 10657c3ecb6838ef7a2ca306c0f3cd68022f0855ae71Dan Gohmanunsigned FastISel::FastEmit_ri_(MVT VT, unsigned Opcode, 1066a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned Op0, bool Op0IsKill, 1067a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman uint64_t Imm, MVT ImmType) { 1068602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner // If this is a multiply by a power of two, emit this as a shift left. 1069602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner if (Opcode == ISD::MUL && isPowerOf2_64(Imm)) { 1070602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner Opcode = ISD::SHL; 1071602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner Imm = Log2_64(Imm); 1072090ca9108b35a60e8b97b67987d00cf47a383dbaChris Lattner } else if (Opcode == ISD::UDIV && isPowerOf2_64(Imm)) { 1073090ca9108b35a60e8b97b67987d00cf47a383dbaChris Lattner // div x, 8 -> srl x, 3 1074090ca9108b35a60e8b97b67987d00cf47a383dbaChris Lattner Opcode = ISD::SRL; 1075090ca9108b35a60e8b97b67987d00cf47a383dbaChris Lattner Imm = Log2_64(Imm); 1076602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner } 1077d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 1078602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner // Horrible hack (to be removed), check to make sure shift amounts are 1079602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner // in-range. 1080602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner if ((Opcode == ISD::SHL || Opcode == ISD::SRA || Opcode == ISD::SRL) && 1081602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner Imm >= VT.getSizeInBits()) 1082602fc0681726155942907debee1fe0b8b44ffc1bChris Lattner return 0; 1083d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 108483785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng // First check if immediate type is legal. If not, we can't use the ri form. 1085a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned ResultReg = FastEmit_ri(VT, VT, Opcode, Op0, Op0IsKill, Imm); 108683785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng if (ResultReg != 0) 108783785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng return ResultReg; 10880f84e4e31009eecf2dfcbe6113b65d0919f30254Owen Anderson unsigned MaterialReg = FastEmit_i(ImmType, ImmType, ISD::Constant, Imm); 1089b2b03fc2fa87cb5604dd8ec2e8476d051186cdb3Eli Friedman if (MaterialReg == 0) { 1090b2b03fc2fa87cb5604dd8ec2e8476d051186cdb3Eli Friedman // This is a bit ugly/slow, but failing here means falling out of 1091b2b03fc2fa87cb5604dd8ec2e8476d051186cdb3Eli Friedman // fast-isel, which would be very slow. 1092db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner IntegerType *ITy = IntegerType::get(FuncInfo.Fn->getContext(), 1093b2b03fc2fa87cb5604dd8ec2e8476d051186cdb3Eli Friedman VT.getSizeInBits()); 1094b2b03fc2fa87cb5604dd8ec2e8476d051186cdb3Eli Friedman MaterialReg = getRegForValue(ConstantInt::get(ITy, Imm)); 1095b2b03fc2fa87cb5604dd8ec2e8476d051186cdb3Eli Friedman } 1096a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman return FastEmit_rr(VT, VT, Opcode, 1097a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman Op0, Op0IsKill, 1098a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman MaterialReg, /*Kill=*/true); 1099d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman} 1100d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman 1101d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohmanunsigned FastISel::createResultReg(const TargetRegisterClass* RC) { 1102d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman return MRI.createVirtualRegister(RC); 110383785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng} 110483785c80968165b30fcdd111ceb2c28d38bcff86Evan Cheng 1105b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohmanunsigned FastISel::FastEmitInst_(unsigned MachineInstOpcode, 110677ad79689d755c49146f534107421cb3d9703fedDan Gohman const TargetRegisterClass* RC) { 1107d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman unsigned ResultReg = createResultReg(RC); 1108e837dead3c8dc3445ef6a0e2322179c57e264a13Evan Cheng const MCInstrDesc &II = TII.get(MachineInstOpcode); 1109b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 111084023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg); 1111b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman return ResultReg; 1112b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman} 1113b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 1114b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohmanunsigned FastISel::FastEmitInst_r(unsigned MachineInstOpcode, 1115b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman const TargetRegisterClass *RC, 1116a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned Op0, bool Op0IsKill) { 1117d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman unsigned ResultReg = createResultReg(RC); 1118e837dead3c8dc3445ef6a0e2322179c57e264a13Evan Cheng const MCInstrDesc &II = TII.get(MachineInstOpcode); 1119b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 11205960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng if (II.getNumDefs() >= 1) 112184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg) 112284023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill); 11235960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng else { 112484023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 112584023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill); 1126e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 1127e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen ResultReg).addReg(II.ImplicitDefs[0]); 11285960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng } 11295960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng 1130b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman return ResultReg; 1131b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman} 1132b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 1133b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohmanunsigned FastISel::FastEmitInst_rr(unsigned MachineInstOpcode, 1134b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman const TargetRegisterClass *RC, 1135a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned Op0, bool Op0IsKill, 1136a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned Op1, bool Op1IsKill) { 1137d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman unsigned ResultReg = createResultReg(RC); 1138e837dead3c8dc3445ef6a0e2322179c57e264a13Evan Cheng const MCInstrDesc &II = TII.get(MachineInstOpcode); 1139b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman 11405960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng if (II.getNumDefs() >= 1) 114184023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg) 1142a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill) 1143a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op1, Op1IsKill * RegState::Kill); 11445960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng else { 114584023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 1146a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill) 1147a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op1, Op1IsKill * RegState::Kill); 1148e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 1149e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen ResultReg).addReg(II.ImplicitDefs[0]); 11505960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng } 1151b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman return ResultReg; 1152b0cf29c5cfff797284b3660dc233e135feb65d9aDan Gohman} 1153d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman 1154d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Andersonunsigned FastISel::FastEmitInst_rrr(unsigned MachineInstOpcode, 1155d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson const TargetRegisterClass *RC, 1156d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson unsigned Op0, bool Op0IsKill, 1157d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson unsigned Op1, bool Op1IsKill, 1158d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson unsigned Op2, bool Op2IsKill) { 1159d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson unsigned ResultReg = createResultReg(RC); 1160e837dead3c8dc3445ef6a0e2322179c57e264a13Evan Cheng const MCInstrDesc &II = TII.get(MachineInstOpcode); 1161d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson 1162d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson if (II.getNumDefs() >= 1) 1163d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg) 1164d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson .addReg(Op0, Op0IsKill * RegState::Kill) 1165d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson .addReg(Op1, Op1IsKill * RegState::Kill) 1166d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson .addReg(Op2, Op2IsKill * RegState::Kill); 1167d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson else { 1168d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 1169d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson .addReg(Op0, Op0IsKill * RegState::Kill) 1170d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson .addReg(Op1, Op1IsKill * RegState::Kill) 1171d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson .addReg(Op2, Op2IsKill * RegState::Kill); 1172d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 1173d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson ResultReg).addReg(II.ImplicitDefs[0]); 1174d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson } 1175d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson return ResultReg; 1176d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson} 1177d71867a8f4b1ab6ab8cc8f5b1a732184ec5bad1bOwen Anderson 1178d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohmanunsigned FastISel::FastEmitInst_ri(unsigned MachineInstOpcode, 1179d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman const TargetRegisterClass *RC, 1180a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned Op0, bool Op0IsKill, 1181a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman uint64_t Imm) { 1182d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman unsigned ResultReg = createResultReg(RC); 1183e837dead3c8dc3445ef6a0e2322179c57e264a13Evan Cheng const MCInstrDesc &II = TII.get(MachineInstOpcode); 1184d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman 11855960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng if (II.getNumDefs() >= 1) 118684023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg) 1187a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill) 1188a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addImm(Imm); 11895960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng else { 119084023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 1191a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill) 1192a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addImm(Imm); 1193e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 1194e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen ResultReg).addReg(II.ImplicitDefs[0]); 11955960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng } 1196d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman return ResultReg; 1197d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman} 1198d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman 11992ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Andersonunsigned FastISel::FastEmitInst_rii(unsigned MachineInstOpcode, 12002ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson const TargetRegisterClass *RC, 12012ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson unsigned Op0, bool Op0IsKill, 12022ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson uint64_t Imm1, uint64_t Imm2) { 12032ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson unsigned ResultReg = createResultReg(RC); 1204e837dead3c8dc3445ef6a0e2322179c57e264a13Evan Cheng const MCInstrDesc &II = TII.get(MachineInstOpcode); 12052ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson 12062ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson if (II.getNumDefs() >= 1) 12072ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg) 12082ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson .addReg(Op0, Op0IsKill * RegState::Kill) 12092ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson .addImm(Imm1) 12102ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson .addImm(Imm2); 12112ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson else { 12122ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 12132ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson .addReg(Op0, Op0IsKill * RegState::Kill) 12142ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson .addImm(Imm1) 12152ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson .addImm(Imm2); 12162ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 12172ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson ResultReg).addReg(II.ImplicitDefs[0]); 12182ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson } 12192ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson return ResultReg; 12202ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson} 12212ce5bf188dfa4329eb246df6011dd1edde5a5979Owen Anderson 122210df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohmanunsigned FastISel::FastEmitInst_rf(unsigned MachineInstOpcode, 122310df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman const TargetRegisterClass *RC, 1224a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned Op0, bool Op0IsKill, 1225a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman const ConstantFP *FPImm) { 122610df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman unsigned ResultReg = createResultReg(RC); 1227e837dead3c8dc3445ef6a0e2322179c57e264a13Evan Cheng const MCInstrDesc &II = TII.get(MachineInstOpcode); 122810df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman 12295960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng if (II.getNumDefs() >= 1) 123084023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg) 1231a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill) 1232a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addFPImm(FPImm); 12335960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng else { 123484023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 1235a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill) 1236a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addFPImm(FPImm); 1237e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 1238e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen ResultReg).addReg(II.ImplicitDefs[0]); 12395960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng } 124010df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman return ResultReg; 124110df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman} 124210df0fa73e396bbc93a8940e8b53827390c54d10Dan Gohman 1243d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohmanunsigned FastISel::FastEmitInst_rri(unsigned MachineInstOpcode, 1244d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman const TargetRegisterClass *RC, 1245a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned Op0, bool Op0IsKill, 1246a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned Op1, bool Op1IsKill, 1247a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman uint64_t Imm) { 1248d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman unsigned ResultReg = createResultReg(RC); 1249e837dead3c8dc3445ef6a0e2322179c57e264a13Evan Cheng const MCInstrDesc &II = TII.get(MachineInstOpcode); 1250d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman 12515960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng if (II.getNumDefs() >= 1) 125284023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg) 1253a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill) 1254a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op1, Op1IsKill * RegState::Kill) 1255a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addImm(Imm); 12565960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng else { 125784023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II) 1258a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op0, Op0IsKill * RegState::Kill) 1259a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addReg(Op1, Op1IsKill * RegState::Kill) 1260a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman .addImm(Imm); 1261e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 1262e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen ResultReg).addReg(II.ImplicitDefs[0]); 12635960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng } 1264d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman return ResultReg; 1265d5fe57d2f980c6bd1a61450f99c254a76d0f1683Dan Gohman} 12666d0c25ec3a7ca822e68f73a4481eee43eb5c9485Owen Anderson 12676d0c25ec3a7ca822e68f73a4481eee43eb5c9485Owen Andersonunsigned FastISel::FastEmitInst_i(unsigned MachineInstOpcode, 12686d0c25ec3a7ca822e68f73a4481eee43eb5c9485Owen Anderson const TargetRegisterClass *RC, 12696d0c25ec3a7ca822e68f73a4481eee43eb5c9485Owen Anderson uint64_t Imm) { 12706d0c25ec3a7ca822e68f73a4481eee43eb5c9485Owen Anderson unsigned ResultReg = createResultReg(RC); 1271e837dead3c8dc3445ef6a0e2322179c57e264a13Evan Cheng const MCInstrDesc &II = TII.get(MachineInstOpcode); 1272bf17cfa3f904e488e898ac2e3af706fd1a892f08Wesley Peck 12735960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng if (II.getNumDefs() >= 1) 127484023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg).addImm(Imm); 12755960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng else { 127684023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II).addImm(Imm); 1277e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 1278e797e0c8644a649d162fb339b148f5db10447d4eJakob Stoklund Olesen ResultReg).addReg(II.ImplicitDefs[0]); 12795960e4eb68be6b3bca6369f6a95d7de5ed8a9eadEvan Cheng } 12806d0c25ec3a7ca822e68f73a4481eee43eb5c9485Owen Anderson return ResultReg; 1281b41aec54767a825ac54c8822e787700bb08a3460Evan Cheng} 12828970f00deff00ffce1f35cf00883357e1582daa1Owen Anderson 1283d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Andersonunsigned FastISel::FastEmitInst_ii(unsigned MachineInstOpcode, 1284d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson const TargetRegisterClass *RC, 1285d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson uint64_t Imm1, uint64_t Imm2) { 1286d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson unsigned ResultReg = createResultReg(RC); 1287e837dead3c8dc3445ef6a0e2322179c57e264a13Evan Cheng const MCInstrDesc &II = TII.get(MachineInstOpcode); 1288d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 1289d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson if (II.getNumDefs() >= 1) 1290d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II, ResultReg) 1291d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson .addImm(Imm1).addImm(Imm2); 1292d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson else { 1293d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II).addImm(Imm1).addImm(Imm2); 1294d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), 1295d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson ResultReg).addReg(II.ImplicitDefs[0]); 1296d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson } 1297d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson return ResultReg; 1298d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson} 1299d74ea775af55782e3b0d5b10fa7602f8822a2f72Owen Anderson 1300825b72b0571821bf2d378749f69d6c4cfb52d2f9Owen Andersonunsigned FastISel::FastEmitInst_extractsubreg(MVT RetVT, 1301a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman unsigned Op0, bool Op0IsKill, 1302a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman uint32_t Idx) { 1303536ab130ec95cbb7bf30530251dafa7dfecc8471Evan Cheng unsigned ResultReg = createResultReg(TLI.getRegClassFor(RetVT)); 13040bc25f40402f48ba42fc45403f635b20d90fabb3Jakob Stoklund Olesen assert(TargetRegisterInfo::isVirtualRegister(Op0) && 13050bc25f40402f48ba42fc45403f635b20d90fabb3Jakob Stoklund Olesen "Cannot yet extract from physregs"); 130684023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, 130784023e0fbefc406a4c611d3d64a10df5d3a97dd7Dan Gohman DL, TII.get(TargetOpcode::COPY), ResultReg) 13080bc25f40402f48ba42fc45403f635b20d90fabb3Jakob Stoklund Olesen .addReg(Op0, getKillRegState(Op0IsKill), Idx); 13098970f00deff00ffce1f35cf00883357e1582daa1Owen Anderson return ResultReg; 13108970f00deff00ffce1f35cf00883357e1582daa1Owen Anderson} 131114ea1ec2324cb595f2e035bbf54ddcd483f17c11Dan Gohman 131214ea1ec2324cb595f2e035bbf54ddcd483f17c11Dan Gohman/// FastEmitZExtFromI1 - Emit MachineInstrs to compute the value of Op 131314ea1ec2324cb595f2e035bbf54ddcd483f17c11Dan Gohman/// with all but the least significant bit set to zero. 1314a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohmanunsigned FastISel::FastEmitZExtFromI1(MVT VT, unsigned Op0, bool Op0IsKill) { 1315a6cb641f48df20f6f79018569b519e5a32e897a2Dan Gohman return FastEmit_ri(VT, VT, ISD::AND, Op0, Op0IsKill, 1); 131614ea1ec2324cb595f2e035bbf54ddcd483f17c11Dan Gohman} 1317f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1318f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman/// HandlePHINodesInSuccessorBlocks - Handle PHI nodes in successor blocks. 1319f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman/// Emit code to ensure constants are copied into registers when needed. 1320f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman/// Remember the virtual registers that need to be added to the Machine PHI 1321f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman/// nodes as input. We cannot just directly add them, because expansion 1322f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman/// might result in multiple MBB's for one BB. As such, the start of the 1323f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman/// BB might correspond to a different MBB than the end. 1324f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohmanbool FastISel::HandlePHINodesInSuccessorBlocks(const BasicBlock *LLVMBB) { 1325f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman const TerminatorInst *TI = LLVMBB->getTerminator(); 1326f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1327f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman SmallPtrSet<MachineBasicBlock *, 4> SuccsHandled; 1328a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman unsigned OrigNumPHINodesToUpdate = FuncInfo.PHINodesToUpdate.size(); 1329f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1330f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // Check successor nodes' PHI nodes that expect a constant to be available 1331f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // from this block. 1332f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman for (unsigned succ = 0, e = TI->getNumSuccessors(); succ != e; ++succ) { 1333f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman const BasicBlock *SuccBB = TI->getSuccessor(succ); 1334f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman if (!isa<PHINode>(SuccBB->begin())) continue; 1335a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman MachineBasicBlock *SuccMBB = FuncInfo.MBBMap[SuccBB]; 1336f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1337f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // If this terminator has multiple identical successors (common for 1338f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // switches), only handle each succ once. 1339f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman if (!SuccsHandled.insert(SuccMBB)) continue; 1340f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1341f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman MachineBasicBlock::iterator MBBI = SuccMBB->begin(); 1342f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1343f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // At this point we know that there is a 1-1 correspondence between LLVM PHI 1344f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // nodes and Machine PHI nodes, but the incoming operands have not been 1345f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // emitted yet. 1346f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman for (BasicBlock::const_iterator I = SuccBB->begin(); 1347f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman const PHINode *PN = dyn_cast<PHINode>(I); ++I) { 1348fb95f89e8ebd0b71408472e2544e2b8d6d4738e5Dan Gohman 1349f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // Ignore dead phi's. 1350f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman if (PN->use_empty()) continue; 1351f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1352f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // Only handle legal types. Two interesting things to note here. First, 1353f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // by bailing out early, we may leave behind some dead instructions, 1354f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // since SelectionDAG's HandlePHINodesInSuccessorBlocks will insert its 13557a2bdde0a0eebcd2125055e0eacaca040f0b766cChris Lattner // own moves. Second, this check is necessary because FastISel doesn't 135689496d0eb73ab8771b27b3d9c1db6492d8eefc3aDan Gohman // use CreateRegs to create registers, so it always creates 1357f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // exactly one register for each non-void instruction. 1358f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman EVT VT = TLI.getValueType(PN->getType(), /*AllowUnknown=*/true); 1359f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman if (VT == MVT::Other || !TLI.isTypeLegal(VT)) { 1360f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman // Promote MVT::i1. 1361f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman if (VT == MVT::i1) 1362f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman VT = TLI.getTypeToTransformTo(LLVMBB->getContext(), VT); 1363f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman else { 1364a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman FuncInfo.PHINodesToUpdate.resize(OrigNumPHINodesToUpdate); 1365f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman return false; 1366f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman } 1367f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman } 1368f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1369f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman const Value *PHIOp = PN->getIncomingValueForBlock(LLVMBB); 1370f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1371fb95f89e8ebd0b71408472e2544e2b8d6d4738e5Dan Gohman // Set the DebugLoc for the copy. Prefer the location of the operand 1372fb95f89e8ebd0b71408472e2544e2b8d6d4738e5Dan Gohman // if there is one; use the location of the PHI otherwise. 1373fb95f89e8ebd0b71408472e2544e2b8d6d4738e5Dan Gohman DL = PN->getDebugLoc(); 1374fb95f89e8ebd0b71408472e2544e2b8d6d4738e5Dan Gohman if (const Instruction *Inst = dyn_cast<Instruction>(PHIOp)) 1375fb95f89e8ebd0b71408472e2544e2b8d6d4738e5Dan Gohman DL = Inst->getDebugLoc(); 1376fb95f89e8ebd0b71408472e2544e2b8d6d4738e5Dan Gohman 1377f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman unsigned Reg = getRegForValue(PHIOp); 1378f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman if (Reg == 0) { 1379a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman FuncInfo.PHINodesToUpdate.resize(OrigNumPHINodesToUpdate); 1380f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman return false; 1381f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman } 1382a4160c3434b08288d1f79f1acbe453d1b9610b22Dan Gohman FuncInfo.PHINodesToUpdate.push_back(std::make_pair(MBBI++, Reg)); 1383fb95f89e8ebd0b71408472e2544e2b8d6d4738e5Dan Gohman DL = DebugLoc(); 1384f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman } 1385f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman } 1386f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman 1387f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman return true; 1388f81eca0ab908fdcf98ae0efaa75acccc8ba40dc2Dan Gohman} 1389