TargetFolder.h revision 508955156a25a9abc470a29e1760aa176d341cf9
1//====-- llvm/Support/TargetFolder.h - Constant folding helper -*- C++ -*-====// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the TargetFolder class, a helper for IRBuilder. 11// It provides IRBuilder with a set of methods for creating constants with 12// target dependent folding, in addition to the same target-independent 13// folding that the ConstantFolder class provides. For general constant 14// creation and folding, use ConstantExpr and the routines in 15// llvm/Analysis/ConstantFolding.h. 16// 17//===----------------------------------------------------------------------===// 18 19#ifndef LLVM_SUPPORT_TARGETFOLDER_H 20#define LLVM_SUPPORT_TARGETFOLDER_H 21 22#include "llvm/Constants.h" 23#include "llvm/Analysis/ConstantFolding.h" 24 25namespace llvm { 26 27class TargetData; 28class LLVMContext; 29 30/// TargetFolder - Create constants with target dependent folding. 31class TargetFolder { 32 const TargetData *TD; 33 LLVMContext* Context; 34 35 /// Fold - Fold the constant using target specific information. 36 Constant *Fold(Constant *C) const { 37 if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) 38 if (Constant *CF = ConstantFoldConstantExpression(CE, Context, TD)) 39 return CF; 40 return C; 41 } 42 43public: 44 explicit TargetFolder(const TargetData *TheTD, LLVMContext* C) : 45 TD(TheTD), Context(C) {} 46 47 //===--------------------------------------------------------------------===// 48 // Binary Operators 49 //===--------------------------------------------------------------------===// 50 51 Constant *CreateAdd(Constant *LHS, Constant *RHS) const { 52 return Fold(ConstantExpr::getAdd(LHS, RHS)); 53 } 54 Constant *CreateFAdd(Constant *LHS, Constant *RHS) const { 55 return Fold(ConstantExpr::getFAdd(LHS, RHS)); 56 } 57 Constant *CreateSub(Constant *LHS, Constant *RHS) const { 58 return Fold(ConstantExpr::getSub(LHS, RHS)); 59 } 60 Constant *CreateFSub(Constant *LHS, Constant *RHS) const { 61 return Fold(ConstantExpr::getFSub(LHS, RHS)); 62 } 63 Constant *CreateMul(Constant *LHS, Constant *RHS) const { 64 return Fold(ConstantExpr::getMul(LHS, RHS)); 65 } 66 Constant *CreateFMul(Constant *LHS, Constant *RHS) const { 67 return Fold(ConstantExpr::getFMul(LHS, RHS)); 68 } 69 Constant *CreateUDiv(Constant *LHS, Constant *RHS) const { 70 return Fold(ConstantExpr::getUDiv(LHS, RHS)); 71 } 72 Constant *CreateSDiv(Constant *LHS, Constant *RHS) const { 73 return Fold(ConstantExpr::getSDiv(LHS, RHS)); 74 } 75 Constant *CreateFDiv(Constant *LHS, Constant *RHS) const { 76 return Fold(ConstantExpr::getFDiv(LHS, RHS)); 77 } 78 Constant *CreateURem(Constant *LHS, Constant *RHS) const { 79 return Fold(ConstantExpr::getURem(LHS, RHS)); 80 } 81 Constant *CreateSRem(Constant *LHS, Constant *RHS) const { 82 return Fold(ConstantExpr::getSRem(LHS, RHS)); 83 } 84 Constant *CreateFRem(Constant *LHS, Constant *RHS) const { 85 return Fold(ConstantExpr::getFRem(LHS, RHS)); 86 } 87 Constant *CreateShl(Constant *LHS, Constant *RHS) const { 88 return Fold(ConstantExpr::getShl(LHS, RHS)); 89 } 90 Constant *CreateLShr(Constant *LHS, Constant *RHS) const { 91 return Fold(ConstantExpr::getLShr(LHS, RHS)); 92 } 93 Constant *CreateAShr(Constant *LHS, Constant *RHS) const { 94 return Fold(ConstantExpr::getAShr(LHS, RHS)); 95 } 96 Constant *CreateAnd(Constant *LHS, Constant *RHS) const { 97 return Fold(ConstantExpr::getAnd(LHS, RHS)); 98 } 99 Constant *CreateOr(Constant *LHS, Constant *RHS) const { 100 return Fold(ConstantExpr::getOr(LHS, RHS)); 101 } 102 Constant *CreateXor(Constant *LHS, Constant *RHS) const { 103 return Fold(ConstantExpr::getXor(LHS, RHS)); 104 } 105 106 Constant *CreateBinOp(Instruction::BinaryOps Opc, 107 Constant *LHS, Constant *RHS) const { 108 return Fold(ConstantExpr::get(Opc, LHS, RHS)); 109 } 110 111 //===--------------------------------------------------------------------===// 112 // Unary Operators 113 //===--------------------------------------------------------------------===// 114 115 Constant *CreateNeg(Constant *C) const { 116 return Fold(ConstantExpr::getNeg(C)); 117 } 118 Constant *CreateFNeg(Constant *C) const { 119 return Fold(ConstantExpr::getFNeg(C)); 120 } 121 Constant *CreateNot(Constant *C) const { 122 return Fold(ConstantExpr::getNot(C)); 123 } 124 125 //===--------------------------------------------------------------------===// 126 // Memory Instructions 127 //===--------------------------------------------------------------------===// 128 129 Constant *CreateGetElementPtr(Constant *C, Constant* const *IdxList, 130 unsigned NumIdx) const { 131 return Fold(ConstantExpr::getGetElementPtr(C, IdxList, NumIdx)); 132 } 133 Constant *CreateGetElementPtr(Constant *C, Value* const *IdxList, 134 unsigned NumIdx) const { 135 return Fold(ConstantExpr::getGetElementPtr(C, IdxList, NumIdx)); 136 } 137 138 //===--------------------------------------------------------------------===// 139 // Cast/Conversion Operators 140 //===--------------------------------------------------------------------===// 141 142 Constant *CreateCast(Instruction::CastOps Op, Constant *C, 143 const Type *DestTy) const { 144 if (C->getType() == DestTy) 145 return C; // avoid calling Fold 146 return Fold(ConstantExpr::getCast(Op, C, DestTy)); 147 } 148 Constant *CreateIntCast(Constant *C, const Type *DestTy, 149 bool isSigned) const { 150 if (C->getType() == DestTy) 151 return C; // avoid calling Fold 152 return Fold(ConstantExpr::getIntegerCast(C, DestTy, isSigned)); 153 } 154 155 Constant *CreateBitCast(Constant *C, const Type *DestTy) const { 156 return CreateCast(Instruction::BitCast, C, DestTy); 157 } 158 Constant *CreateIntToPtr(Constant *C, const Type *DestTy) const { 159 return CreateCast(Instruction::IntToPtr, C, DestTy); 160 } 161 Constant *CreatePtrToInt(Constant *C, const Type *DestTy) const { 162 return CreateCast(Instruction::PtrToInt, C, DestTy); 163 } 164 Constant *CreateTruncOrBitCast(Constant *C, const Type *DestTy) const { 165 if (C->getType() == DestTy) 166 return C; // avoid calling Fold 167 return Fold(ConstantExpr::getTruncOrBitCast(C, DestTy)); 168 } 169 170 //===--------------------------------------------------------------------===// 171 // Compare Instructions 172 //===--------------------------------------------------------------------===// 173 174 Constant *CreateICmp(CmpInst::Predicate P, Constant *LHS, 175 Constant *RHS) const { 176 return Fold(ConstantExpr::getCompare(P, LHS, RHS)); 177 } 178 Constant *CreateFCmp(CmpInst::Predicate P, Constant *LHS, 179 Constant *RHS) const { 180 return Fold(ConstantExpr::getCompare(P, LHS, RHS)); 181 } 182 Constant *CreateVICmp(CmpInst::Predicate P, Constant *LHS, 183 Constant *RHS) const { 184 return Fold(ConstantExpr::getCompare(P, LHS, RHS)); 185 } 186 Constant *CreateVFCmp(CmpInst::Predicate P, Constant *LHS, 187 Constant *RHS) const { 188 return Fold(ConstantExpr::getCompare(P, LHS, RHS)); 189 } 190 191 //===--------------------------------------------------------------------===// 192 // Other Instructions 193 //===--------------------------------------------------------------------===// 194 195 Constant *CreateSelect(Constant *C, Constant *True, Constant *False) const { 196 return Fold(ConstantExpr::getSelect(C, True, False)); 197 } 198 199 Constant *CreateExtractElement(Constant *Vec, Constant *Idx) const { 200 return Fold(ConstantExpr::getExtractElement(Vec, Idx)); 201 } 202 203 Constant *CreateInsertElement(Constant *Vec, Constant *NewElt, 204 Constant *Idx) const { 205 return Fold(ConstantExpr::getInsertElement(Vec, NewElt, Idx)); 206 } 207 208 Constant *CreateShuffleVector(Constant *V1, Constant *V2, 209 Constant *Mask) const { 210 return Fold(ConstantExpr::getShuffleVector(V1, V2, Mask)); 211 } 212 213 Constant *CreateExtractValue(Constant *Agg, const unsigned *IdxList, 214 unsigned NumIdx) const { 215 return Fold(ConstantExpr::getExtractValue(Agg, IdxList, NumIdx)); 216 } 217 218 Constant *CreateInsertValue(Constant *Agg, Constant *Val, 219 const unsigned *IdxList, unsigned NumIdx) const { 220 return Fold(ConstantExpr::getInsertValue(Agg, Val, IdxList, NumIdx)); 221 } 222}; 223 224} 225 226#endif 227