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) const {
50 return Fold(ConstantExpr::getAdd(LHS, RHS));
52 Constant *CreateNSWAdd(Constant *LHS, Constant *RHS) const {
53 return Fold(ConstantExpr::getNSWAdd(LHS, RHS));
55 Constant *CreateFAdd(Constant *LHS, Constant *RHS) const {
56 return Fold(ConstantExpr::getFAdd(LHS, RHS));
58 Constant *CreateSub(Constant *LHS, Constant *RHS) const {
59 return Fold(ConstantExpr::getSub(LHS, RHS));
61 Constant *CreateNSWSub(Constant *LHS, Constant *RHS) const {
62 return Fold(ConstantExpr::getNSWSub(LHS, RHS));
64 Constant *CreateFSub(Constant *LHS, Constant *RHS) const {
65 return Fold(ConstantExpr::getFSub(LHS, RHS));
67 Constant *CreateMul(Constant *LHS, Constant *RHS) const {
68 return Fold(ConstantExpr::getMul(LHS, RHS));
70 Constant *CreateNSWMul(Constant *LHS, Constant *RHS) const {
71 return Fold(ConstantExpr::getNSWMul(LHS, RHS));
73 Constant *CreateFMul(Constant *LHS, Constant *RHS) const {
74 return Fold(ConstantExpr::getFMul(LHS, RHS));
76 Constant *CreateUDiv(Constant *LHS, Constant *RHS) const {
77 return Fold(ConstantExpr::getUDiv(LHS, RHS));
79 Constant *CreateSDiv(Constant *LHS, Constant *RHS) const {
80 return Fold(ConstantExpr::getSDiv(LHS, RHS));
82 Constant *CreateExactSDiv(Constant *LHS, Constant *RHS) const {
83 return Fold(ConstantExpr::getExactSDiv(LHS, RHS));
85 Constant *CreateFDiv(Constant *LHS, Constant *RHS) const {
86 return Fold(ConstantExpr::getFDiv(LHS, RHS));
88 Constant *CreateURem(Constant *LHS, Constant *RHS) const {
89 return Fold(ConstantExpr::getURem(LHS, RHS));
91 Constant *CreateSRem(Constant *LHS, Constant *RHS) const {
92 return Fold(ConstantExpr::getSRem(LHS, RHS));
94 Constant *CreateFRem(Constant *LHS, Constant *RHS) const {
95 return Fold(ConstantExpr::getFRem(LHS, RHS));
97 Constant *CreateShl(Constant *LHS, Constant *RHS) const {
98 return Fold(ConstantExpr::getShl(LHS, RHS));
100 Constant *CreateLShr(Constant *LHS, Constant *RHS) const {
101 return Fold(ConstantExpr::getLShr(LHS, RHS));
103 Constant *CreateAShr(Constant *LHS, Constant *RHS) const {
104 return Fold(ConstantExpr::getAShr(LHS, RHS));
106 Constant *CreateAnd(Constant *LHS, Constant *RHS) const {
107 return Fold(ConstantExpr::getAnd(LHS, RHS));
109 Constant *CreateOr(Constant *LHS, Constant *RHS) const {
110 return Fold(ConstantExpr::getOr(LHS, RHS));
112 Constant *CreateXor(Constant *LHS, Constant *RHS) const {
113 return Fold(ConstantExpr::getXor(LHS, RHS));
116 Constant *CreateBinOp(Instruction::BinaryOps Opc,
117 Constant *LHS, Constant *RHS) const {
118 return Fold(ConstantExpr::get(Opc, LHS, RHS));
121 //===--------------------------------------------------------------------===//
123 //===--------------------------------------------------------------------===//
125 Constant *CreateNeg(Constant *C) const {
126 return Fold(ConstantExpr::getNeg(C));
128 Constant *CreateNSWNeg(Constant *C) const {
129 return Fold(ConstantExpr::getNSWNeg(C));
131 Constant *CreateFNeg(Constant *C) const {
132 return Fold(ConstantExpr::getFNeg(C));
134 Constant *CreateNot(Constant *C) const {
135 return Fold(ConstantExpr::getNot(C));
138 //===--------------------------------------------------------------------===//
139 // Memory Instructions
140 //===--------------------------------------------------------------------===//
142 Constant *CreateGetElementPtr(Constant *C, Constant* const *IdxList,
143 unsigned NumIdx) const {
144 return Fold(ConstantExpr::getGetElementPtr(C, IdxList, NumIdx));
146 Constant *CreateGetElementPtr(Constant *C, Value* const *IdxList,
147 unsigned NumIdx) const {
148 return Fold(ConstantExpr::getGetElementPtr(C, IdxList, NumIdx));
151 Constant *CreateInBoundsGetElementPtr(Constant *C, Constant* const *IdxList,
152 unsigned NumIdx) const {
153 return Fold(ConstantExpr::getInBoundsGetElementPtr(C, IdxList, NumIdx));
155 Constant *CreateInBoundsGetElementPtr(Constant *C, Value* const *IdxList,
156 unsigned NumIdx) const {
157 return Fold(ConstantExpr::getInBoundsGetElementPtr(C, IdxList, NumIdx));
160 //===--------------------------------------------------------------------===//
161 // Cast/Conversion Operators
162 //===--------------------------------------------------------------------===//
164 Constant *CreateCast(Instruction::CastOps Op, Constant *C,
165 const Type *DestTy) const {
166 if (C->getType() == DestTy)
167 return C; // avoid calling Fold
168 return Fold(ConstantExpr::getCast(Op, C, DestTy));
170 Constant *CreateIntCast(Constant *C, const Type *DestTy,
171 bool isSigned) const {
172 if (C->getType() == DestTy)
173 return C; // avoid calling Fold
174 return Fold(ConstantExpr::getIntegerCast(C, DestTy, isSigned));
177 Constant *CreateBitCast(Constant *C, const Type *DestTy) const {
178 return CreateCast(Instruction::BitCast, C, DestTy);
180 Constant *CreateIntToPtr(Constant *C, const Type *DestTy) const {
181 return CreateCast(Instruction::IntToPtr, C, DestTy);
183 Constant *CreatePtrToInt(Constant *C, const Type *DestTy) const {
184 return CreateCast(Instruction::PtrToInt, C, DestTy);
186 Constant *CreateZExtOrBitCast(Constant *C, const Type *DestTy) const {
187 if (C->getType() == DestTy)
188 return C; // avoid calling Fold
189 return Fold(ConstantExpr::getZExtOrBitCast(C, DestTy));
191 Constant *CreateSExtOrBitCast(Constant *C, const Type *DestTy) const {
192 if (C->getType() == DestTy)
193 return C; // avoid calling Fold
194 return Fold(ConstantExpr::getSExtOrBitCast(C, DestTy));
196 Constant *CreateTruncOrBitCast(Constant *C, const Type *DestTy) const {
197 if (C->getType() == DestTy)
198 return C; // avoid calling Fold
199 return Fold(ConstantExpr::getTruncOrBitCast(C, DestTy));
202 //===--------------------------------------------------------------------===//
203 // Compare Instructions
204 //===--------------------------------------------------------------------===//
206 Constant *CreateICmp(CmpInst::Predicate P, Constant *LHS,
207 Constant *RHS) const {
208 return Fold(ConstantExpr::getCompare(P, LHS, RHS));
210 Constant *CreateFCmp(CmpInst::Predicate P, Constant *LHS,
211 Constant *RHS) const {
212 return Fold(ConstantExpr::getCompare(P, LHS, RHS));
215 //===--------------------------------------------------------------------===//
216 // Other Instructions
217 //===--------------------------------------------------------------------===//
219 Constant *CreateSelect(Constant *C, Constant *True, Constant *False) const {
220 return Fold(ConstantExpr::getSelect(C, True, False));
223 Constant *CreateExtractElement(Constant *Vec, Constant *Idx) const {
224 return Fold(ConstantExpr::getExtractElement(Vec, Idx));
227 Constant *CreateInsertElement(Constant *Vec, Constant *NewElt,
228 Constant *Idx) const {
229 return Fold(ConstantExpr::getInsertElement(Vec, NewElt, Idx));
232 Constant *CreateShuffleVector(Constant *V1, Constant *V2,
233 Constant *Mask) const {
234 return Fold(ConstantExpr::getShuffleVector(V1, V2, Mask));
237 Constant *CreateExtractValue(Constant *Agg, const unsigned *IdxList,
238 unsigned NumIdx) const {
239 return Fold(ConstantExpr::getExtractValue(Agg, IdxList, NumIdx));
242 Constant *CreateInsertValue(Constant *Agg, Constant *Val,
243 const unsigned *IdxList, unsigned NumIdx) const {
244 return Fold(ConstantExpr::getInsertValue(Agg, Val, IdxList, NumIdx));