163f3ca5da75a614c603c04757edeaac123879d39Matt Arsenault//===- InstCombine.h - Main InstCombine pass definition ---------*- C++ -*-===// 2ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner// 3ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner// The LLVM Compiler Infrastructure 4ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner// 5ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner// This file is distributed under the University of Illinois Open Source 6ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner// License. See LICENSE.TXT for details. 7ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner// 8ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner//===----------------------------------------------------------------------===// 9ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner 10ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner#ifndef INSTCOMBINE_INSTCOMBINE_H 11ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner#define INSTCOMBINE_INSTCOMBINE_H 12ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner 13ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner#include "InstCombineWorklist.h" 1436b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines#include "llvm/Analysis/TargetFolder.h" 15a1514e24cc24b050f53a12650e047799358833a1Chandler Carruth#include "llvm/Analysis/ValueTracking.h" 160b8c9a80f20772c3793201ab5b251d3520b9cea3Chandler Carruth#include "llvm/IR/IRBuilder.h" 1736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines#include "llvm/IR/InstVisitor.h" 180b8c9a80f20772c3793201ab5b251d3520b9cea3Chandler Carruth#include "llvm/IR/IntrinsicInst.h" 190b8c9a80f20772c3793201ab5b251d3520b9cea3Chandler Carruth#include "llvm/IR/Operator.h" 20ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner#include "llvm/Pass.h" 215e8904576a5260cfd5b14596e338a4bb25b9817eMeador Inge#include "llvm/Transforms/Utils/SimplifyLibCalls.h" 22ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner 23dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines#define DEBUG_TYPE "instcombine" 24dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines 25ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattnernamespace llvm { 26dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesclass CallSite; 27dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesclass DataLayout; 28dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesclass TargetLibraryInfo; 29dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesclass DbgDeclareInst; 30dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesclass MemIntrinsic; 31dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hinesclass MemSetInst; 32e673b54bdde4b538cbd67eadac80a15d238c926fJakub Staszak 33ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner/// SelectPatternFlavor - We can match a variety of different patterns for 34ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner/// select operations. 35ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattnerenum SelectPatternFlavor { 36ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner SPF_UNKNOWN = 0, 37dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines SPF_SMIN, 38dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines SPF_UMIN, 39dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines SPF_SMAX, 40cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines SPF_UMAX, 41cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines SPF_ABS, 42cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines SPF_NABS 43ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner}; 44e673b54bdde4b538cbd67eadac80a15d238c926fJakub Staszak 4502446fc99abb06d3117d65c0b1f5fba4f906db2eChris Lattner/// getComplexity: Assign a complexity or rank value to LLVM Values... 4602446fc99abb06d3117d65c0b1f5fba4f906db2eChris Lattner/// 0 -> undef, 1 -> Const, 2 -> Other, 3 -> Arg, 3 -> Unary, 4 -> OtherInst 4702446fc99abb06d3117d65c0b1f5fba4f906db2eChris Lattnerstatic inline unsigned getComplexity(Value *V) { 4802446fc99abb06d3117d65c0b1f5fba4f906db2eChris Lattner if (isa<Instruction>(V)) { 49dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines if (BinaryOperator::isNeg(V) || BinaryOperator::isFNeg(V) || 5002446fc99abb06d3117d65c0b1f5fba4f906db2eChris Lattner BinaryOperator::isNot(V)) 5102446fc99abb06d3117d65c0b1f5fba4f906db2eChris Lattner return 3; 5202446fc99abb06d3117d65c0b1f5fba4f906db2eChris Lattner return 4; 5302446fc99abb06d3117d65c0b1f5fba4f906db2eChris Lattner } 54dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines if (isa<Argument>(V)) 55dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines return 3; 5602446fc99abb06d3117d65c0b1f5fba4f906db2eChris Lattner return isa<Constant>(V) ? (isa<UndefValue>(V) ? 0 : 1) : 2; 5702446fc99abb06d3117d65c0b1f5fba4f906db2eChris Lattner} 58ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner 5936b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines/// AddOne - Add one to a Constant 6036b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hinesstatic inline Constant *AddOne(Constant *C) { 6136b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines return ConstantExpr::getAdd(C, ConstantInt::get(C->getType(), 1)); 6236b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines} 6336b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines/// SubOne - Subtract one from a Constant 6436b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hinesstatic inline Constant *SubOne(Constant *C) { 6536b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines return ConstantExpr::getSub(C, ConstantInt::get(C->getType(), 1)); 6636b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines} 6736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines 68ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner/// InstCombineIRInserter - This is an IRBuilder insertion helper that works 69ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner/// just like the normal insertion helper, but also adds any new instructions 70ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner/// to the instcombine worklist. 71e673b54bdde4b538cbd67eadac80a15d238c926fJakub Staszakclass LLVM_LIBRARY_VISIBILITY InstCombineIRInserter 72ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner : public IRBuilderDefaultInserter<true> { 73ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner InstCombineWorklist &Worklist; 74dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines 75ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattnerpublic: 76ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner InstCombineIRInserter(InstCombineWorklist &WL) : Worklist(WL) {} 77e673b54bdde4b538cbd67eadac80a15d238c926fJakub Staszak 78dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines void InsertHelper(Instruction *I, const Twine &Name, BasicBlock *BB, 79dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines BasicBlock::iterator InsertPt) const { 80ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner IRBuilderDefaultInserter<true>::InsertHelper(I, Name, BB, InsertPt); 81ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Worklist.Add(I); 82ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner } 83ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner}; 84e673b54bdde4b538cbd67eadac80a15d238c926fJakub Staszak 85ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner/// InstCombiner - The -instcombine pass. 8616d8f8bd919b72866e687d99f3aa94a140137c59Duncan Sandsclass LLVM_LIBRARY_VISIBILITY InstCombiner 87dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines : public FunctionPass, 88dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines public InstVisitor<InstCombiner, Instruction *> { 8936b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines const DataLayout *DL; 9000737bdb488cc7157ca5f7a40d6cd8467ad09a79Chad Rosier TargetLibraryInfo *TLI; 91ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner bool MadeIRChange; 925e8904576a5260cfd5b14596e338a4bb25b9817eMeador Inge LibCallSimplifier *Simplifier; 93637582eaf77e6892094cea0bf6b9483f50b5d94eQuentin Colombet bool MinimizeSize; 94dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines 95ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattnerpublic: 96ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner /// Worklist - All of the instructions that need to be simplified. 97ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner InstCombineWorklist Worklist; 98ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner 99ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner /// Builder - This is an IRBuilder that automatically inserts new 100ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner /// instructions into the worklist when they are created. 101ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner typedef IRBuilder<true, TargetFolder, InstCombineIRInserter> BuilderTy; 102ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner BuilderTy *Builder; 103e673b54bdde4b538cbd67eadac80a15d238c926fJakub Staszak 104ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner static char ID; // Pass identification, replacement for typeid 105dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines InstCombiner() : FunctionPass(ID), DL(nullptr), Builder(nullptr) { 106637582eaf77e6892094cea0bf6b9483f50b5d94eQuentin Colombet MinimizeSize = false; 107081c34b725980f995be9080eaec24cd3dfaaf065Owen Anderson initializeInstCombinerPass(*PassRegistry::getPassRegistry()); 108081c34b725980f995be9080eaec24cd3dfaaf065Owen Anderson } 109ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner 110ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattnerpublic: 11136b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines bool runOnFunction(Function &F) override; 112e673b54bdde4b538cbd67eadac80a15d238c926fJakub Staszak 113ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner bool DoOneIteration(Function &F, unsigned ItNum); 114ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner 11536b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines void getAnalysisUsage(AnalysisUsage &AU) const override; 11600737bdb488cc7157ca5f7a40d6cd8467ad09a79Chad Rosier 11736b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines const DataLayout *getDataLayout() const { return DL; } 118ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner 119aab8e28d5e470711d80276bbf717408c3ab966fdChad Rosier TargetLibraryInfo *getTargetLibraryInfo() const { return TLI; } 120aab8e28d5e470711d80276bbf717408c3ab966fdChad Rosier 121ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner // Visitation implementation - Implement instruction combining for different 122ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner // instruction types. The semantics are as follows: 123ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner // Return Value: 124ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner // null - No change was made 125ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner // I - Change was made, I is still valid, I may be dead though 126ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner // otherwise - Change was made, replace I with returned instruction 127ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner // 128ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitAdd(BinaryOperator &I); 129ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitFAdd(BinaryOperator &I); 130db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner Value *OptimizePointerDifference(Value *LHS, Value *RHS, Type *Ty); 131ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitSub(BinaryOperator &I); 132ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitFSub(BinaryOperator &I); 133ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitMul(BinaryOperator &I); 13436b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines Value *foldFMulConst(Instruction *FMulOrDiv, Constant *C, 135d3ae2866d105f6da6375544eb41aea0dad75a9f2Shuxin Yang Instruction *InsertBefore); 136ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitFMul(BinaryOperator &I); 137ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitURem(BinaryOperator &I); 138ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitSRem(BinaryOperator &I); 139ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitFRem(BinaryOperator &I); 140ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner bool SimplifyDivRemOfSelect(BinaryOperator &I); 141ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *commonRemTransforms(BinaryOperator &I); 142ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *commonIRemTransforms(BinaryOperator &I); 143ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *commonDivTransforms(BinaryOperator &I); 144ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *commonIDivTransforms(BinaryOperator &I); 145ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitUDiv(BinaryOperator &I); 146ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitSDiv(BinaryOperator &I); 14731726c154dafa9fef08b1bcac9822c2a4618ec19Frits van Bommel Instruction *visitFDiv(BinaryOperator &I); 148f34f48c57870cf4eb4d48e23b11e29b95d1950c3Chris Lattner Value *FoldAndOfICmps(ICmpInst *LHS, ICmpInst *RHS); 149f34f48c57870cf4eb4d48e23b11e29b95d1950c3Chris Lattner Value *FoldAndOfFCmps(FCmpInst *LHS, FCmpInst *RHS); 150ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitAnd(BinaryOperator &I); 151f34f48c57870cf4eb4d48e23b11e29b95d1950c3Chris Lattner Value *FoldOrOfICmps(ICmpInst *LHS, ICmpInst *RHS); 152f34f48c57870cf4eb4d48e23b11e29b95d1950c3Chris Lattner Value *FoldOrOfFCmps(FCmpInst *LHS, FCmpInst *RHS); 153dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines Instruction *FoldOrWithConstants(BinaryOperator &I, Value *Op, Value *A, 154dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines Value *B, Value *C); 155dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines Instruction *visitOr(BinaryOperator &I); 156ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitXor(BinaryOperator &I); 157ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitShl(BinaryOperator &I); 158ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitAShr(BinaryOperator &I); 159ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitLShr(BinaryOperator &I); 160ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *commonShiftTransforms(BinaryOperator &I); 161ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *FoldFCmp_IntToFP_Cst(FCmpInst &I, Instruction *LHSI, 162ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Constant *RHSC); 163ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *FoldCmpLoadFromIndexedGlobal(GetElementPtrInst *GEP, 164ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner GlobalVariable *GV, CmpInst &ICI, 165dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines ConstantInt *AndCst = nullptr); 166ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitFCmpInst(FCmpInst &I); 167ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitICmpInst(ICmpInst &I); 168ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitICmpInstWithCastAndCast(ICmpInst &ICI); 169dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines Instruction *visitICmpInstWithInstAndIntCst(ICmpInst &ICI, Instruction *LHS, 170ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner ConstantInt *RHS); 171ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *FoldICmpDivCst(ICmpInst &ICI, BinaryOperator *DivI, 172ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner ConstantInt *DivRHS); 17374542aa5001fb6ff3d7d0958b5c391cde63df1caChris Lattner Instruction *FoldICmpShrCst(ICmpInst &ICI, BinaryOperator *DivI, 17474542aa5001fb6ff3d7d0958b5c391cde63df1caChris Lattner ConstantInt *DivRHS); 17519a6f1133fbc01d18bd07cdc082e9488d731bcbcBenjamin Kramer Instruction *FoldICmpAddOpCst(Instruction &ICI, Value *X, ConstantInt *CI, 17619a6f1133fbc01d18bd07cdc082e9488d731bcbcBenjamin Kramer ICmpInst::Predicate Pred); 177ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *FoldGEPICmp(GEPOperator *GEPLHS, Value *RHS, 178ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner ICmpInst::Predicate Cond, Instruction &I); 179dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines Instruction *FoldShiftByConstant(Value *Op0, Constant *Op1, 180ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner BinaryOperator &I); 181ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *commonCastTransforms(CastInst &CI); 182ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *commonPointerCastTransforms(CastInst &CI); 183ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitTrunc(TruncInst &CI); 184ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitZExt(ZExtInst &CI); 185ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitSExt(SExtInst &CI); 186ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitFPTrunc(FPTruncInst &CI); 187ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitFPExt(CastInst &CI); 188ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitFPToUI(FPToUIInst &FI); 189ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitFPToSI(FPToSIInst &FI); 190ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitUIToFP(CastInst &CI); 191ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitSIToFP(CastInst &CI); 192ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitPtrToInt(PtrToIntInst &CI); 193ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitIntToPtr(IntToPtrInst &CI); 194ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitBitCast(BitCastInst &CI); 1956dd44d3b7f33c9984dfb40461630d50c4fed1234Matt Arsenault Instruction *visitAddrSpaceCast(AddrSpaceCastInst &CI); 196dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines Instruction *FoldSelectOpOp(SelectInst &SI, Instruction *TI, Instruction *FI); 197dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines Instruction *FoldSelectIntoOp(SelectInst &SI, Value *, Value *); 198ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *FoldSPFofSPF(Instruction *Inner, SelectPatternFlavor SPF1, 199ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Value *A, Value *B, Instruction &Outer, 200ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner SelectPatternFlavor SPF2, Value *C); 201ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitSelectInst(SelectInst &SI); 202ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitSelectInstWithICmp(SelectInst &SI, ICmpInst *ICI); 203ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitCallInst(CallInst &CI); 204ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitInvokeInst(InvokeInst &II); 205ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner 206ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *SliceUpIllegalIntegerPHI(PHINode &PN); 207ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitPHINode(PHINode &PN); 208ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitGetElementPtrInst(GetElementPtrInst &GEP); 209ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitAllocaInst(AllocaInst &AI); 21078f8ef42173a3a9867ed789073d4ddc652fb7ff2Nuno Lopes Instruction *visitAllocSite(Instruction &FI); 211916973706d9b2559c7f88cef8b0f4e40a6450c06Gabor Greif Instruction *visitFree(CallInst &FI); 212ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitLoadInst(LoadInst &LI); 213ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitStoreInst(StoreInst &SI); 214ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitBranchInst(BranchInst &BI); 215ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitSwitchInst(SwitchInst &SI); 216dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines Instruction *visitInsertValueInst(InsertValueInst &IV); 217ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitInsertElementInst(InsertElementInst &IE); 218ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitExtractElementInst(ExtractElementInst &EI); 219ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitShuffleVectorInst(ShuffleVectorInst &SVI); 220ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitExtractValueInst(ExtractValueInst &EV); 2210ad7b6e773b33f4c4fd3c82c8a5c10ac0597792cDuncan Sands Instruction *visitLandingPadInst(LandingPadInst &LI); 222ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner 223ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner // visitInstruction - Specify what to return for unhandled instructions... 224dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines Instruction *visitInstruction(Instruction &I) { return nullptr; } 225ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner 226ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattnerprivate: 227db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner bool ShouldChangeType(Type *From, Type *To) const; 22802446fc99abb06d3117d65c0b1f5fba4f906db2eChris Lattner Value *dyn_castNegVal(Value *V) const; 229dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines Value *dyn_castFNegVal(Value *V, bool NoSignedZero = false) const; 2308e3367ea36d7b25c79b9d3f14842e8f9c7c5801eMatt Arsenault Type *FindElementAtOffset(Type *PtrTy, int64_t Offset, 231dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines SmallVectorImpl<Value *> &NewIndices); 23280f43d339f0a5904c62ca6268939c14ab148b94fChris Lattner Instruction *FoldOpIntoSelect(Instruction &Op, SelectInst *SI); 233e673b54bdde4b538cbd67eadac80a15d238c926fJakub Staszak 2348c5ad3a5da7419af4d31963c3824836b5da52478Chris Lattner /// ShouldOptimizeCast - Return true if the cast from "V to Ty" actually 2358c5ad3a5da7419af4d31963c3824836b5da52478Chris Lattner /// results in any code being generated and is interesting to optimize out. If 2368c5ad3a5da7419af4d31963c3824836b5da52478Chris Lattner /// the cast can be eliminated by some other simple transformation, we prefer 2378c5ad3a5da7419af4d31963c3824836b5da52478Chris Lattner /// to do the simplification first. 238dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines bool ShouldOptimizeCast(Instruction::CastOps opcode, const Value *V, 239db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner Type *Ty); 24002446fc99abb06d3117d65c0b1f5fba4f906db2eChris Lattner 241ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *visitCallSite(CallSite CS); 24236b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines Instruction *tryOptimizeCall(CallInst *CI, const DataLayout *DL); 243ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner bool transformConstExprCastCall(CallSite CS); 2444a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands Instruction *transformCallThroughTrampoline(CallSite CS, 2454a544a79bd735967f1d33fe675ae4566dbd17813Duncan Sands IntrinsicInst *Tramp); 246ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *transformZExtICmp(ICmpInst *ICI, Instruction &CI, 247ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner bool DoXform = true); 2480a30c42008f88c3fba64127da8d73ba2fcd16fd6Benjamin Kramer Instruction *transformSExtICmp(ICmpInst *ICI, Instruction &CI); 249ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner bool WillNotOverflowSignedAdd(Value *LHS, Value *RHS); 250cd81d94322a39503e4a3e87b6ee03d4fcb3465fbStephen Hines bool WillNotOverflowUnsignedAdd(Value *LHS, Value *RHS); 2515c525b59d5e0036a778d278eeff4832edfd41357Nuno Lopes Value *EmitGEPOffset(User *GEP); 25277e95d04c430bc849aa1898cbd820517ec0f7465Anat Shemer Instruction *scalarizePHI(ExtractElementInst &EI, PHINode *PN); 253903f26d904cb7eba9b57ed85b2dc6147a8811bd7Nick Lewycky Value *EvaluateInDifferentElementOrder(Value *V, ArrayRef<int> Mask); 254ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner 255ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattnerpublic: 256ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner // InsertNewInstBefore - insert an instruction New before instruction Old 257ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner // in the program. Add the new instruction to the worklist. 258ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner // 259ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *InsertNewInstBefore(Instruction *New, Instruction &Old) { 260dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines assert(New && !New->getParent() && 261ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner "New instruction already inserted into a basic block!"); 262ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner BasicBlock *BB = Old.getParent(); 263dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines BB->getInstList().insert(&Old, New); // Insert inst 264ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Worklist.Add(New); 265ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner return New; 266ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner } 2676fd5a6000bb6d23d6e41f6a8b8d07ad3cca3ea76Eli Friedman 268e673b54bdde4b538cbd67eadac80a15d238c926fJakub Staszak // InsertNewInstWith - same as InsertNewInstBefore, but also sets the 2696fd5a6000bb6d23d6e41f6a8b8d07ad3cca3ea76Eli Friedman // debug loc. 2706fd5a6000bb6d23d6e41f6a8b8d07ad3cca3ea76Eli Friedman // 2716fd5a6000bb6d23d6e41f6a8b8d07ad3cca3ea76Eli Friedman Instruction *InsertNewInstWith(Instruction *New, Instruction &Old) { 2726fd5a6000bb6d23d6e41f6a8b8d07ad3cca3ea76Eli Friedman New->setDebugLoc(Old.getDebugLoc()); 2736fd5a6000bb6d23d6e41f6a8b8d07ad3cca3ea76Eli Friedman return InsertNewInstBefore(New, Old); 2746fd5a6000bb6d23d6e41f6a8b8d07ad3cca3ea76Eli Friedman } 2756fd5a6000bb6d23d6e41f6a8b8d07ad3cca3ea76Eli Friedman 276ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner // ReplaceInstUsesWith - This method is to be used when an instruction is 277ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner // found to be dead, replacable with another preexisting expression. Here 278ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner // we add all uses of I to the worklist, replace all uses of I with the new 279ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner // value, then return I, so that the inst combiner will know that I was 280ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner // modified. 281ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner // 282ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *ReplaceInstUsesWith(Instruction &I, Value *V) { 283dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines Worklist.AddUsersToWorkList(I); // Add all modified instrs to worklist. 284e673b54bdde4b538cbd67eadac80a15d238c926fJakub Staszak 285ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner // If we are replacing the instruction with itself, this must be in a 286ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner // segment of unreachable code, so just clobber the instruction. 287e673b54bdde4b538cbd67eadac80a15d238c926fJakub Staszak if (&I == V) 288ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner V = UndefValue::get(I.getType()); 289f56762a96dbd602f1205ff9e6d1b700d5b4a6c8aFrits van Bommel 290596aa123f46158639c836f1d53b89a9d7898c4b7Matt Arsenault DEBUG(dbgs() << "IC: Replacing " << I << "\n" 291f56762a96dbd602f1205ff9e6d1b700d5b4a6c8aFrits van Bommel " with " << *V << '\n'); 292f56762a96dbd602f1205ff9e6d1b700d5b4a6c8aFrits van Bommel 293ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner I.replaceAllUsesWith(V); 294ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner return &I; 295ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner } 296ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner 297ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner // EraseInstFromFunction - When dealing with an instruction that has side 298ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner // effects or produces a void value, we can't rely on DCE to delete the 299ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner // instruction. Instead, visit methods should return the value returned by 300ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner // this function. 301ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *EraseInstFromFunction(Instruction &I) { 302596aa123f46158639c836f1d53b89a9d7898c4b7Matt Arsenault DEBUG(dbgs() << "IC: ERASE " << I << '\n'); 303ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner 304ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner assert(I.use_empty() && "Cannot erase instruction that is used!"); 305ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner // Make sure that we reprocess all operands now that we reduced their 306ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner // use counts. 307ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner if (I.getNumOperands() < 8) { 308ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner for (User::op_iterator i = I.op_begin(), e = I.op_end(); i != e; ++i) 309ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner if (Instruction *Op = dyn_cast<Instruction>(*i)) 310ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Worklist.Add(Op); 311ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner } 312ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Worklist.Remove(&I); 313ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner I.eraseFromParent(); 314ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner MadeIRChange = true; 315dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines return nullptr; // Don't do anything with FI 316ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner } 317e673b54bdde4b538cbd67eadac80a15d238c926fJakub Staszak 318dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines void computeKnownBits(Value *V, APInt &KnownZero, APInt &KnownOne, 319dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines unsigned Depth = 0) const { 320dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines return llvm::computeKnownBits(V, KnownZero, KnownOne, DL, Depth); 321ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner } 322e673b54bdde4b538cbd67eadac80a15d238c926fJakub Staszak 323e673b54bdde4b538cbd67eadac80a15d238c926fJakub Staszak bool MaskedValueIsZero(Value *V, const APInt &Mask, 324ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner unsigned Depth = 0) const { 32536b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines return llvm::MaskedValueIsZero(V, Mask, DL, Depth); 326ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner } 327ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner unsigned ComputeNumSignBits(Value *Op, unsigned Depth = 0) const { 32836b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines return llvm::ComputeNumSignBits(Op, DL, Depth); 329ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner } 330ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner 331ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattnerprivate: 332096aa79276b8527a3cbbb3691e40e729dea09523Duncan Sands /// SimplifyAssociativeOrCommutative - This performs a few simplifications for 333096aa79276b8527a3cbbb3691e40e729dea09523Duncan Sands /// operators which are associative or commutative. 334096aa79276b8527a3cbbb3691e40e729dea09523Duncan Sands bool SimplifyAssociativeOrCommutative(BinaryOperator &I); 335ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner 33637bf92b5238434b00fde79347ba5336e7554e562Duncan Sands /// SimplifyUsingDistributiveLaws - This tries to simplify binary operations 33737bf92b5238434b00fde79347ba5336e7554e562Duncan Sands /// which some other binary operation distributes over either by factorizing 33837bf92b5238434b00fde79347ba5336e7554e562Duncan Sands /// out common terms (eg "(A*B)+(A*C)" -> "A*(B+C)") or expanding out if this 33937bf92b5238434b00fde79347ba5336e7554e562Duncan Sands /// results in simplifications (eg: "A & (B | C) -> (A&B) | (A&C)" if this is 34037bf92b5238434b00fde79347ba5336e7554e562Duncan Sands /// a win). Returns the simplified value, or null if it didn't simplify. 34137bf92b5238434b00fde79347ba5336e7554e562Duncan Sands Value *SimplifyUsingDistributiveLaws(BinaryOperator &I); 3425057f381418ddc8c96699c40479ead993cd62e7bDuncan Sands 343ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner /// SimplifyDemandedUseBits - Attempts to replace V with a simpler value 344ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner /// based on the demanded bits. 345dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines Value *SimplifyDemandedUseBits(Value *V, APInt DemandedMask, APInt &KnownZero, 346dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines APInt &KnownOne, unsigned Depth); 347dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines bool SimplifyDemandedBits(Use &U, APInt DemandedMask, APInt &KnownZero, 348dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines APInt &KnownOne, unsigned Depth = 0); 349c811976b0400257511f2a255ec70538c3614f85eShuxin Yang /// Helper routine of SimplifyDemandedUseBits. It tries to simplify demanded 350c811976b0400257511f2a255ec70538c3614f85eShuxin Yang /// bit for "r1 = shr x, c1; r2 = shl r1, c2" instruction sequence. 351c811976b0400257511f2a255ec70538c3614f85eShuxin Yang Value *SimplifyShrShlDemandedBits(Instruction *Lsr, Instruction *Sftl, 352c811976b0400257511f2a255ec70538c3614f85eShuxin Yang APInt DemandedMask, APInt &KnownZero, 353c811976b0400257511f2a255ec70538c3614f85eShuxin Yang APInt &KnownOne); 354e673b54bdde4b538cbd67eadac80a15d238c926fJakub Staszak 355ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner /// SimplifyDemandedInstructionBits - Inst is an integer instruction that 356ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner /// SimplifyDemandedBits knows about. See if the instruction has any 357ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner /// properties that allow us to simplify its operands. 358ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner bool SimplifyDemandedInstructionBits(Instruction &Inst); 359e673b54bdde4b538cbd67eadac80a15d238c926fJakub Staszak 360ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Value *SimplifyDemandedVectorElts(Value *V, APInt DemandedElts, 361dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines APInt &UndefElts, unsigned Depth = 0); 362dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines 363dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines Value *SimplifyVectorOp(BinaryOperator &Inst); 364e673b54bdde4b538cbd67eadac80a15d238c926fJakub Staszak 365ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner // FoldOpIntoPhi - Given a binary operator, cast instruction, or select 366ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner // which has a PHI node as operand #0, see if we can fold the instruction 367ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner // into the PHI (which is only possible if all operands to the PHI are 368ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner // constants). 369ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner // 3709922ccf4b483ce37524047879f9b2f9bb73e3ccbChris Lattner Instruction *FoldOpIntoPhi(Instruction &I); 371ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner 372ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner // FoldPHIArgOpIntoPHI - If all operands to a PHI node are the same "unary" 373ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner // operator and they all are only used by the PHI, PHI together their 374ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner // inputs, and do the operation once, to the result of the PHI. 375ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *FoldPHIArgOpIntoPHI(PHINode &PN); 376ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *FoldPHIArgBinOpIntoPHI(PHINode &PN); 377ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *FoldPHIArgGEPIntoPHI(PHINode &PN); 378ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *FoldPHIArgLoadIntoPHI(PHINode &PN); 379ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner 380ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *OptAndOp(Instruction *Op, ConstantInt *OpRHS, 381ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner ConstantInt *AndRHS, BinaryOperator &TheAnd); 382e673b54bdde4b538cbd67eadac80a15d238c926fJakub Staszak 383ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Value *FoldLogicalPlusAnd(Value *LHS, Value *RHS, ConstantInt *Mask, 384ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner bool isSub, Instruction &I); 385dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines Value *InsertRangeTest(Value *V, Constant *Lo, Constant *Hi, bool isSigned, 386dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines bool Inside); 387ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *PromoteCastOfAllocation(BitCastInst &CI, AllocaInst &AI); 388ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *MatchBSwap(BinaryOperator &I); 389ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner bool SimplifyStoreAtEndOfBlock(StoreInst &SI); 390ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *SimplifyMemTransfer(MemIntrinsic *MI); 391ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner Instruction *SimplifyMemSet(MemSetInst *MI); 392ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner 393db125cfaf57cc83e7dd7453de2d509bc8efd0e5eChris Lattner Value *EvaluateInDifferentType(Value *V, Type *Ty, bool isSigned); 394bbc7016c60bfe319f4d3bbc525547596e85c9aadDuncan Sands 395bbc7016c60bfe319f4d3bbc525547596e85c9aadDuncan Sands /// Descale - Return a value X such that Val = X * Scale, or null if none. If 396bbc7016c60bfe319f4d3bbc525547596e85c9aadDuncan Sands /// the multiplication is known not to overflow then NoSignedWrap is set. 397bbc7016c60bfe319f4d3bbc525547596e85c9aadDuncan Sands Value *Descale(Value *Val, APInt Scale, bool &NoSignedWrap); 398ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner}; 399ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner 400ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner} // end namespace llvm. 401ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner 402dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines#undef DEBUG_TYPE 403dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines 404ac8f2fd2e217d063d7ef57b8698894739f707431Chris Lattner#endif 405