1 //====-- llvm/Support/TargetFolder.h - Constant folding helper -*- C++ -*-====//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
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.
17 //===----------------------------------------------------------------------===//
19 #ifndef LLVM_SUPPORT_TARGETFOLDER_H
20 #define LLVM_SUPPORT_TARGETFOLDER_H
22 #include "llvm/Constants.h"
23 #include "llvm/Analysis/ConstantFolding.h"
29 /// TargetFolder - Create constants with target dependent folding.
33 /// Fold - Fold the constant using target specific information.
34 Constant *Fold(Constant *C) const {
35 if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C))
36 if (Constant *CF = ConstantFoldConstantExpression(CE, TD))
42 explicit TargetFolder(const TargetData *TheTD) : TD(TheTD) {}
44 //===--------------------------------------------------------------------===//
46 //===--------------------------------------------------------------------===//
48 Constant *CreateAdd(Constant *LHS, Constant *RHS) const {
49 return Fold(ConstantExpr::getAdd(LHS, RHS));
51 Constant *CreateSub(Constant *LHS, Constant *RHS) const {
52 return Fold(ConstantExpr::getSub(LHS, RHS));
54 Constant *CreateMul(Constant *LHS, Constant *RHS) const {
55 return Fold(ConstantExpr::getMul(LHS, RHS));
57 Constant *CreateUDiv(Constant *LHS, Constant *RHS) const {
58 return Fold(ConstantExpr::getUDiv(LHS, RHS));
60 Constant *CreateSDiv(Constant *LHS, Constant *RHS) const {
61 return Fold(ConstantExpr::getSDiv(LHS, RHS));
63 Constant *CreateFDiv(Constant *LHS, Constant *RHS) const {
64 return Fold(ConstantExpr::getFDiv(LHS, RHS));
66 Constant *CreateURem(Constant *LHS, Constant *RHS) const {
67 return Fold(ConstantExpr::getURem(LHS, RHS));
69 Constant *CreateSRem(Constant *LHS, Constant *RHS) const {
70 return Fold(ConstantExpr::getSRem(LHS, RHS));
72 Constant *CreateFRem(Constant *LHS, Constant *RHS) const {
73 return Fold(ConstantExpr::getFRem(LHS, RHS));
75 Constant *CreateShl(Constant *LHS, Constant *RHS) const {
76 return Fold(ConstantExpr::getShl(LHS, RHS));
78 Constant *CreateLShr(Constant *LHS, Constant *RHS) const {
79 return Fold(ConstantExpr::getLShr(LHS, RHS));
81 Constant *CreateAShr(Constant *LHS, Constant *RHS) const {
82 return Fold(ConstantExpr::getAShr(LHS, RHS));
84 Constant *CreateAnd(Constant *LHS, Constant *RHS) const {
85 return Fold(ConstantExpr::getAnd(LHS, RHS));
87 Constant *CreateOr(Constant *LHS, Constant *RHS) const {
88 return Fold(ConstantExpr::getOr(LHS, RHS));
90 Constant *CreateXor(Constant *LHS, Constant *RHS) const {
91 return Fold(ConstantExpr::getXor(LHS, RHS));
94 Constant *CreateBinOp(Instruction::BinaryOps Opc,
95 Constant *LHS, Constant *RHS) const {
96 return Fold(ConstantExpr::get(Opc, LHS, RHS));
99 //===--------------------------------------------------------------------===//
101 //===--------------------------------------------------------------------===//
103 Constant *CreateNeg(Constant *C) const {
104 return Fold(ConstantExpr::getNeg(C));
106 Constant *CreateNot(Constant *C) const {
107 return Fold(ConstantExpr::getNot(C));
110 //===--------------------------------------------------------------------===//
111 // Memory Instructions
112 //===--------------------------------------------------------------------===//
114 Constant *CreateGetElementPtr(Constant *C, Constant* const *IdxList,
115 unsigned NumIdx) const {
116 return Fold(ConstantExpr::getGetElementPtr(C, IdxList, NumIdx));
118 Constant *CreateGetElementPtr(Constant *C, Value* const *IdxList,
119 unsigned NumIdx) const {
120 return Fold(ConstantExpr::getGetElementPtr(C, IdxList, NumIdx));
123 //===--------------------------------------------------------------------===//
124 // Cast/Conversion Operators
125 //===--------------------------------------------------------------------===//
127 Constant *CreateCast(Instruction::CastOps Op, Constant *C,
128 const Type *DestTy) const {
129 if (C->getType() == DestTy)
130 return C; // avoid calling Fold
131 return Fold(ConstantExpr::getCast(Op, C, DestTy));
133 Constant *CreateIntCast(Constant *C, const Type *DestTy,
134 bool isSigned) const {
135 if (C->getType() == DestTy)
136 return C; // avoid calling Fold
137 return Fold(ConstantExpr::getIntegerCast(C, DestTy, isSigned));
140 Constant *CreateBitCast(Constant *C, const Type *DestTy) const {
141 return CreateCast(Instruction::BitCast, C, DestTy);
143 Constant *CreateIntToPtr(Constant *C, const Type *DestTy) const {
144 return CreateCast(Instruction::IntToPtr, C, DestTy);
146 Constant *CreatePtrToInt(Constant *C, const Type *DestTy) const {
147 return CreateCast(Instruction::PtrToInt, C, DestTy);
149 Constant *CreateTruncOrBitCast(Constant *C, const Type *DestTy) const {
150 if (C->getType() == DestTy)
151 return C; // avoid calling Fold
152 return Fold(ConstantExpr::getTruncOrBitCast(C, DestTy));
155 //===--------------------------------------------------------------------===//
156 // Compare Instructions
157 //===--------------------------------------------------------------------===//
159 Constant *CreateICmp(CmpInst::Predicate P, Constant *LHS,
160 Constant *RHS) const {
161 return Fold(ConstantExpr::getCompare(P, LHS, RHS));
163 Constant *CreateFCmp(CmpInst::Predicate P, Constant *LHS,
164 Constant *RHS) const {
165 return Fold(ConstantExpr::getCompare(P, LHS, RHS));
167 Constant *CreateVICmp(CmpInst::Predicate P, Constant *LHS,
168 Constant *RHS) const {
169 return Fold(ConstantExpr::getCompare(P, LHS, RHS));
171 Constant *CreateVFCmp(CmpInst::Predicate P, Constant *LHS,
172 Constant *RHS) const {
173 return Fold(ConstantExpr::getCompare(P, LHS, RHS));
176 //===--------------------------------------------------------------------===//
177 // Other Instructions
178 //===--------------------------------------------------------------------===//
180 Constant *CreateSelect(Constant *C, Constant *True, Constant *False) const {
181 return Fold(ConstantExpr::getSelect(C, True, False));
184 Constant *CreateExtractElement(Constant *Vec, Constant *Idx) const {
185 return Fold(ConstantExpr::getExtractElement(Vec, Idx));
188 Constant *CreateInsertElement(Constant *Vec, Constant *NewElt,
189 Constant *Idx) const {
190 return Fold(ConstantExpr::getInsertElement(Vec, NewElt, Idx));
193 Constant *CreateShuffleVector(Constant *V1, Constant *V2,
194 Constant *Mask) const {
195 return Fold(ConstantExpr::getShuffleVector(V1, V2, Mask));
198 Constant *CreateExtractValue(Constant *Agg, const unsigned *IdxList,
199 unsigned NumIdx) const {
200 return Fold(ConstantExpr::getExtractValue(Agg, IdxList, NumIdx));
203 Constant *CreateInsertValue(Constant *Agg, Constant *Val,
204 const unsigned *IdxList, unsigned NumIdx) const {
205 return Fold(ConstantExpr::getInsertValue(Agg, Val, IdxList, NumIdx));