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"
30 /// TargetFolder - Create constants with target dependent folding.
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))
44 explicit TargetFolder(const TargetData *TheTD, LLVMContext &C) :
45 TD(TheTD), Context(C) {}
47 //===--------------------------------------------------------------------===//
49 //===--------------------------------------------------------------------===//
51 Constant *CreateAdd(Constant *LHS, Constant *RHS) const {
52 return Fold(ConstantExpr::getAdd(LHS, RHS));
54 Constant *CreateFAdd(Constant *LHS, Constant *RHS) const {
55 return Fold(ConstantExpr::getFAdd(LHS, RHS));
57 Constant *CreateSub(Constant *LHS, Constant *RHS) const {
58 return Fold(ConstantExpr::getSub(LHS, RHS));
60 Constant *CreateFSub(Constant *LHS, Constant *RHS) const {
61 return Fold(ConstantExpr::getFSub(LHS, RHS));
63 Constant *CreateMul(Constant *LHS, Constant *RHS) const {
64 return Fold(ConstantExpr::getMul(LHS, RHS));
66 Constant *CreateFMul(Constant *LHS, Constant *RHS) const {
67 return Fold(ConstantExpr::getFMul(LHS, RHS));
69 Constant *CreateUDiv(Constant *LHS, Constant *RHS) const {
70 return Fold(ConstantExpr::getUDiv(LHS, RHS));
72 Constant *CreateSDiv(Constant *LHS, Constant *RHS) const {
73 return Fold(ConstantExpr::getSDiv(LHS, RHS));
75 Constant *CreateExactSDiv(Constant *LHS, Constant *RHS) const {
76 return Fold(ConstantExpr::getExactSDiv(LHS, RHS));
78 Constant *CreateFDiv(Constant *LHS, Constant *RHS) const {
79 return Fold(ConstantExpr::getFDiv(LHS, RHS));
81 Constant *CreateURem(Constant *LHS, Constant *RHS) const {
82 return Fold(ConstantExpr::getURem(LHS, RHS));
84 Constant *CreateSRem(Constant *LHS, Constant *RHS) const {
85 return Fold(ConstantExpr::getSRem(LHS, RHS));
87 Constant *CreateFRem(Constant *LHS, Constant *RHS) const {
88 return Fold(ConstantExpr::getFRem(LHS, RHS));
90 Constant *CreateShl(Constant *LHS, Constant *RHS) const {
91 return Fold(ConstantExpr::getShl(LHS, RHS));
93 Constant *CreateLShr(Constant *LHS, Constant *RHS) const {
94 return Fold(ConstantExpr::getLShr(LHS, RHS));
96 Constant *CreateAShr(Constant *LHS, Constant *RHS) const {
97 return Fold(ConstantExpr::getAShr(LHS, RHS));
99 Constant *CreateAnd(Constant *LHS, Constant *RHS) const {
100 return Fold(ConstantExpr::getAnd(LHS, RHS));
102 Constant *CreateOr(Constant *LHS, Constant *RHS) const {
103 return Fold(ConstantExpr::getOr(LHS, RHS));
105 Constant *CreateXor(Constant *LHS, Constant *RHS) const {
106 return Fold(ConstantExpr::getXor(LHS, RHS));
109 Constant *CreateBinOp(Instruction::BinaryOps Opc,
110 Constant *LHS, Constant *RHS) const {
111 return Fold(ConstantExpr::get(Opc, LHS, RHS));
114 //===--------------------------------------------------------------------===//
116 //===--------------------------------------------------------------------===//
118 Constant *CreateNeg(Constant *C) const {
119 return Fold(ConstantExpr::getNeg(C));
121 Constant *CreateFNeg(Constant *C) const {
122 return Fold(ConstantExpr::getFNeg(C));
124 Constant *CreateNot(Constant *C) const {
125 return Fold(ConstantExpr::getNot(C));
128 //===--------------------------------------------------------------------===//
129 // Memory Instructions
130 //===--------------------------------------------------------------------===//
132 Constant *CreateGetElementPtr(Constant *C, Constant* const *IdxList,
133 unsigned NumIdx) const {
134 return Fold(ConstantExpr::getGetElementPtr(C, IdxList, NumIdx));
136 Constant *CreateGetElementPtr(Constant *C, Value* const *IdxList,
137 unsigned NumIdx) const {
138 return Fold(ConstantExpr::getGetElementPtr(C, IdxList, NumIdx));
141 //===--------------------------------------------------------------------===//
142 // Cast/Conversion Operators
143 //===--------------------------------------------------------------------===//
145 Constant *CreateCast(Instruction::CastOps Op, Constant *C,
146 const Type *DestTy) const {
147 if (C->getType() == DestTy)
148 return C; // avoid calling Fold
149 return Fold(ConstantExpr::getCast(Op, C, DestTy));
151 Constant *CreateIntCast(Constant *C, const Type *DestTy,
152 bool isSigned) const {
153 if (C->getType() == DestTy)
154 return C; // avoid calling Fold
155 return Fold(ConstantExpr::getIntegerCast(C, DestTy, isSigned));
158 Constant *CreateBitCast(Constant *C, const Type *DestTy) const {
159 return CreateCast(Instruction::BitCast, C, DestTy);
161 Constant *CreateIntToPtr(Constant *C, const Type *DestTy) const {
162 return CreateCast(Instruction::IntToPtr, C, DestTy);
164 Constant *CreatePtrToInt(Constant *C, const Type *DestTy) const {
165 return CreateCast(Instruction::PtrToInt, C, DestTy);
167 Constant *CreateTruncOrBitCast(Constant *C, const Type *DestTy) const {
168 if (C->getType() == DestTy)
169 return C; // avoid calling Fold
170 return Fold(ConstantExpr::getTruncOrBitCast(C, DestTy));
173 //===--------------------------------------------------------------------===//
174 // Compare Instructions
175 //===--------------------------------------------------------------------===//
177 Constant *CreateICmp(CmpInst::Predicate P, Constant *LHS,
178 Constant *RHS) const {
179 return Fold(ConstantExpr::getCompare(P, LHS, RHS));
181 Constant *CreateFCmp(CmpInst::Predicate P, Constant *LHS,
182 Constant *RHS) const {
183 return Fold(ConstantExpr::getCompare(P, LHS, RHS));
186 //===--------------------------------------------------------------------===//
187 // Other Instructions
188 //===--------------------------------------------------------------------===//
190 Constant *CreateSelect(Constant *C, Constant *True, Constant *False) const {
191 return Fold(ConstantExpr::getSelect(C, True, False));
194 Constant *CreateExtractElement(Constant *Vec, Constant *Idx) const {
195 return Fold(ConstantExpr::getExtractElement(Vec, Idx));
198 Constant *CreateInsertElement(Constant *Vec, Constant *NewElt,
199 Constant *Idx) const {
200 return Fold(ConstantExpr::getInsertElement(Vec, NewElt, Idx));
203 Constant *CreateShuffleVector(Constant *V1, Constant *V2,
204 Constant *Mask) const {
205 return Fold(ConstantExpr::getShuffleVector(V1, V2, Mask));
208 Constant *CreateExtractValue(Constant *Agg, const unsigned *IdxList,
209 unsigned NumIdx) const {
210 return Fold(ConstantExpr::getExtractValue(Agg, IdxList, NumIdx));
213 Constant *CreateInsertValue(Constant *Agg, Constant *Val,
214 const unsigned *IdxList, unsigned NumIdx) const {
215 return Fold(ConstantExpr::getInsertValue(Agg, Val, IdxList, NumIdx));