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/InstrTypes.h"
24 #include "llvm/Analysis/ConstantFolding.h"
30 /// TargetFolder - Create constants with target dependent folding.
34 /// Fold - Fold the constant using target specific information.
35 Constant *Fold(Constant *C) const {
36 if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C))
37 if (Constant *CF = ConstantFoldConstantExpression(CE, TD))
43 explicit TargetFolder(const TargetData *TheTD) : TD(TheTD) {}
45 //===--------------------------------------------------------------------===//
47 //===--------------------------------------------------------------------===//
49 Constant *CreateAdd(Constant *LHS, Constant *RHS,
50 bool HasNUW = false, bool HasNSW = false) const {
51 return Fold(ConstantExpr::getAdd(LHS, RHS, HasNUW, HasNSW));
53 Constant *CreateFAdd(Constant *LHS, Constant *RHS) const {
54 return Fold(ConstantExpr::getFAdd(LHS, RHS));
56 Constant *CreateSub(Constant *LHS, Constant *RHS,
57 bool HasNUW = false, bool HasNSW = false) const {
58 return Fold(ConstantExpr::getSub(LHS, RHS, HasNUW, HasNSW));
60 Constant *CreateFSub(Constant *LHS, Constant *RHS) const {
61 return Fold(ConstantExpr::getFSub(LHS, RHS));
63 Constant *CreateMul(Constant *LHS, Constant *RHS,
64 bool HasNUW = false, bool HasNSW = false) const {
65 return Fold(ConstantExpr::getMul(LHS, RHS, HasNUW, HasNSW));
67 Constant *CreateFMul(Constant *LHS, Constant *RHS) const {
68 return Fold(ConstantExpr::getFMul(LHS, RHS));
70 Constant *CreateUDiv(Constant *LHS, Constant *RHS, bool isExact = false)const{
71 return Fold(ConstantExpr::getUDiv(LHS, RHS, isExact));
73 Constant *CreateSDiv(Constant *LHS, Constant *RHS, bool isExact = false)const{
74 return Fold(ConstantExpr::getSDiv(LHS, RHS, isExact));
76 Constant *CreateFDiv(Constant *LHS, Constant *RHS) const {
77 return Fold(ConstantExpr::getFDiv(LHS, RHS));
79 Constant *CreateURem(Constant *LHS, Constant *RHS) const {
80 return Fold(ConstantExpr::getURem(LHS, RHS));
82 Constant *CreateSRem(Constant *LHS, Constant *RHS) const {
83 return Fold(ConstantExpr::getSRem(LHS, RHS));
85 Constant *CreateFRem(Constant *LHS, Constant *RHS) const {
86 return Fold(ConstantExpr::getFRem(LHS, RHS));
88 Constant *CreateShl(Constant *LHS, Constant *RHS,
89 bool HasNUW = false, bool HasNSW = false) const {
90 return Fold(ConstantExpr::getShl(LHS, RHS, HasNUW, HasNSW));
92 Constant *CreateLShr(Constant *LHS, Constant *RHS, bool isExact = false)const{
93 return Fold(ConstantExpr::getLShr(LHS, RHS, isExact));
95 Constant *CreateAShr(Constant *LHS, Constant *RHS, bool isExact = false)const{
96 return Fold(ConstantExpr::getAShr(LHS, RHS, isExact));
98 Constant *CreateAnd(Constant *LHS, Constant *RHS) const {
99 return Fold(ConstantExpr::getAnd(LHS, RHS));
101 Constant *CreateOr(Constant *LHS, Constant *RHS) const {
102 return Fold(ConstantExpr::getOr(LHS, RHS));
104 Constant *CreateXor(Constant *LHS, Constant *RHS) const {
105 return Fold(ConstantExpr::getXor(LHS, RHS));
108 Constant *CreateBinOp(Instruction::BinaryOps Opc,
109 Constant *LHS, Constant *RHS) const {
110 return Fold(ConstantExpr::get(Opc, LHS, RHS));
113 //===--------------------------------------------------------------------===//
115 //===--------------------------------------------------------------------===//
117 Constant *CreateNeg(Constant *C,
118 bool HasNUW = false, bool HasNSW = false) const {
119 return Fold(ConstantExpr::getNeg(C, HasNUW, HasNSW));
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 Constant *CreateInBoundsGetElementPtr(Constant *C, Constant* const *IdxList,
142 unsigned NumIdx) const {
143 return Fold(ConstantExpr::getInBoundsGetElementPtr(C, IdxList, NumIdx));
145 Constant *CreateInBoundsGetElementPtr(Constant *C, Value* const *IdxList,
146 unsigned NumIdx) const {
147 return Fold(ConstantExpr::getInBoundsGetElementPtr(C, IdxList, NumIdx));
150 //===--------------------------------------------------------------------===//
151 // Cast/Conversion Operators
152 //===--------------------------------------------------------------------===//
154 Constant *CreateCast(Instruction::CastOps Op, Constant *C,
155 const Type *DestTy) const {
156 if (C->getType() == DestTy)
157 return C; // avoid calling Fold
158 return Fold(ConstantExpr::getCast(Op, C, DestTy));
160 Constant *CreateIntCast(Constant *C, const Type *DestTy,
161 bool isSigned) const {
162 if (C->getType() == DestTy)
163 return C; // avoid calling Fold
164 return Fold(ConstantExpr::getIntegerCast(C, DestTy, isSigned));
166 Constant *CreatePointerCast(Constant *C, const Type *DestTy) const {
167 return ConstantExpr::getPointerCast(C, DestTy);
169 Constant *CreateBitCast(Constant *C, const Type *DestTy) const {
170 return CreateCast(Instruction::BitCast, C, DestTy);
172 Constant *CreateIntToPtr(Constant *C, const Type *DestTy) const {
173 return CreateCast(Instruction::IntToPtr, C, DestTy);
175 Constant *CreatePtrToInt(Constant *C, const Type *DestTy) const {
176 return CreateCast(Instruction::PtrToInt, C, DestTy);
178 Constant *CreateZExtOrBitCast(Constant *C, const Type *DestTy) const {
179 if (C->getType() == DestTy)
180 return C; // avoid calling Fold
181 return Fold(ConstantExpr::getZExtOrBitCast(C, DestTy));
183 Constant *CreateSExtOrBitCast(Constant *C, const Type *DestTy) const {
184 if (C->getType() == DestTy)
185 return C; // avoid calling Fold
186 return Fold(ConstantExpr::getSExtOrBitCast(C, DestTy));
188 Constant *CreateTruncOrBitCast(Constant *C, const Type *DestTy) const {
189 if (C->getType() == DestTy)
190 return C; // avoid calling Fold
191 return Fold(ConstantExpr::getTruncOrBitCast(C, DestTy));
194 //===--------------------------------------------------------------------===//
195 // Compare Instructions
196 //===--------------------------------------------------------------------===//
198 Constant *CreateICmp(CmpInst::Predicate P, Constant *LHS,
199 Constant *RHS) const {
200 return Fold(ConstantExpr::getCompare(P, LHS, RHS));
202 Constant *CreateFCmp(CmpInst::Predicate P, Constant *LHS,
203 Constant *RHS) const {
204 return Fold(ConstantExpr::getCompare(P, LHS, RHS));
207 //===--------------------------------------------------------------------===//
208 // Other Instructions
209 //===--------------------------------------------------------------------===//
211 Constant *CreateSelect(Constant *C, Constant *True, Constant *False) const {
212 return Fold(ConstantExpr::getSelect(C, True, False));
215 Constant *CreateExtractElement(Constant *Vec, Constant *Idx) const {
216 return Fold(ConstantExpr::getExtractElement(Vec, Idx));
219 Constant *CreateInsertElement(Constant *Vec, Constant *NewElt,
220 Constant *Idx) const {
221 return Fold(ConstantExpr::getInsertElement(Vec, NewElt, Idx));
224 Constant *CreateShuffleVector(Constant *V1, Constant *V2,
225 Constant *Mask) const {
226 return Fold(ConstantExpr::getShuffleVector(V1, V2, Mask));
229 Constant *CreateExtractValue(Constant *Agg, const unsigned *IdxList,
230 unsigned NumIdx) const {
231 return Fold(ConstantExpr::getExtractValue(Agg, IdxList, NumIdx));
234 Constant *CreateInsertValue(Constant *Agg, Constant *Val,
235 const unsigned *IdxList, unsigned NumIdx) const {
236 return Fold(ConstantExpr::getInsertValue(Agg, Val, IdxList, NumIdx));