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, LLVMContext &C) :
46 //===--------------------------------------------------------------------===//
48 //===--------------------------------------------------------------------===//
50 Constant *CreateAdd(Constant *LHS, Constant *RHS) const {
51 return Fold(ConstantExpr::getAdd(LHS, RHS));
53 Constant *CreateNSWAdd(Constant *LHS, Constant *RHS) const {
54 return Fold(ConstantExpr::getNSWAdd(LHS, RHS));
56 Constant *CreateFAdd(Constant *LHS, Constant *RHS) const {
57 return Fold(ConstantExpr::getFAdd(LHS, RHS));
59 Constant *CreateSub(Constant *LHS, Constant *RHS) const {
60 return Fold(ConstantExpr::getSub(LHS, RHS));
62 Constant *CreateNSWSub(Constant *LHS, Constant *RHS) const {
63 return Fold(ConstantExpr::getNSWSub(LHS, RHS));
65 Constant *CreateFSub(Constant *LHS, Constant *RHS) const {
66 return Fold(ConstantExpr::getFSub(LHS, RHS));
68 Constant *CreateMul(Constant *LHS, Constant *RHS) const {
69 return Fold(ConstantExpr::getMul(LHS, RHS));
71 Constant *CreateFMul(Constant *LHS, Constant *RHS) const {
72 return Fold(ConstantExpr::getFMul(LHS, RHS));
74 Constant *CreateUDiv(Constant *LHS, Constant *RHS) const {
75 return Fold(ConstantExpr::getUDiv(LHS, RHS));
77 Constant *CreateSDiv(Constant *LHS, Constant *RHS) const {
78 return Fold(ConstantExpr::getSDiv(LHS, RHS));
80 Constant *CreateExactSDiv(Constant *LHS, Constant *RHS) const {
81 return Fold(ConstantExpr::getExactSDiv(LHS, RHS));
83 Constant *CreateFDiv(Constant *LHS, Constant *RHS) const {
84 return Fold(ConstantExpr::getFDiv(LHS, RHS));
86 Constant *CreateURem(Constant *LHS, Constant *RHS) const {
87 return Fold(ConstantExpr::getURem(LHS, RHS));
89 Constant *CreateSRem(Constant *LHS, Constant *RHS) const {
90 return Fold(ConstantExpr::getSRem(LHS, RHS));
92 Constant *CreateFRem(Constant *LHS, Constant *RHS) const {
93 return Fold(ConstantExpr::getFRem(LHS, RHS));
95 Constant *CreateShl(Constant *LHS, Constant *RHS) const {
96 return Fold(ConstantExpr::getShl(LHS, RHS));
98 Constant *CreateLShr(Constant *LHS, Constant *RHS) const {
99 return Fold(ConstantExpr::getLShr(LHS, RHS));
101 Constant *CreateAShr(Constant *LHS, Constant *RHS) const {
102 return Fold(ConstantExpr::getAShr(LHS, RHS));
104 Constant *CreateAnd(Constant *LHS, Constant *RHS) const {
105 return Fold(ConstantExpr::getAnd(LHS, RHS));
107 Constant *CreateOr(Constant *LHS, Constant *RHS) const {
108 return Fold(ConstantExpr::getOr(LHS, RHS));
110 Constant *CreateXor(Constant *LHS, Constant *RHS) const {
111 return Fold(ConstantExpr::getXor(LHS, RHS));
114 Constant *CreateBinOp(Instruction::BinaryOps Opc,
115 Constant *LHS, Constant *RHS) const {
116 return Fold(ConstantExpr::get(Opc, LHS, RHS));
119 //===--------------------------------------------------------------------===//
121 //===--------------------------------------------------------------------===//
123 Constant *CreateNeg(Constant *C) const {
124 return Fold(ConstantExpr::getNeg(C));
126 Constant *CreateFNeg(Constant *C) const {
127 return Fold(ConstantExpr::getFNeg(C));
129 Constant *CreateNot(Constant *C) const {
130 return Fold(ConstantExpr::getNot(C));
133 //===--------------------------------------------------------------------===//
134 // Memory Instructions
135 //===--------------------------------------------------------------------===//
137 Constant *CreateGetElementPtr(Constant *C, Constant* const *IdxList,
138 unsigned NumIdx) const {
139 return Fold(ConstantExpr::getGetElementPtr(C, IdxList, NumIdx));
141 Constant *CreateGetElementPtr(Constant *C, Value* const *IdxList,
142 unsigned NumIdx) const {
143 return Fold(ConstantExpr::getGetElementPtr(C, IdxList, NumIdx));
146 Constant *CreateInBoundsGetElementPtr(Constant *C, Constant* const *IdxList,
147 unsigned NumIdx) const {
148 return Fold(ConstantExpr::getInBoundsGetElementPtr(C, IdxList, NumIdx));
150 Constant *CreateInBoundsGetElementPtr(Constant *C, Value* const *IdxList,
151 unsigned NumIdx) const {
152 return Fold(ConstantExpr::getInBoundsGetElementPtr(C, IdxList, NumIdx));
155 //===--------------------------------------------------------------------===//
156 // Cast/Conversion Operators
157 //===--------------------------------------------------------------------===//
159 Constant *CreateCast(Instruction::CastOps Op, Constant *C,
160 const Type *DestTy) const {
161 if (C->getType() == DestTy)
162 return C; // avoid calling Fold
163 return Fold(ConstantExpr::getCast(Op, C, DestTy));
165 Constant *CreateIntCast(Constant *C, const Type *DestTy,
166 bool isSigned) const {
167 if (C->getType() == DestTy)
168 return C; // avoid calling Fold
169 return Fold(ConstantExpr::getIntegerCast(C, DestTy, isSigned));
172 Constant *CreateBitCast(Constant *C, const Type *DestTy) const {
173 return CreateCast(Instruction::BitCast, C, DestTy);
175 Constant *CreateIntToPtr(Constant *C, const Type *DestTy) const {
176 return CreateCast(Instruction::IntToPtr, C, DestTy);
178 Constant *CreatePtrToInt(Constant *C, const Type *DestTy) const {
179 return CreateCast(Instruction::PtrToInt, C, DestTy);
181 Constant *CreateZExtOrBitCast(Constant *C, const Type *DestTy) const {
182 if (C->getType() == DestTy)
183 return C; // avoid calling Fold
184 return Fold(ConstantExpr::getZExtOrBitCast(C, DestTy));
186 Constant *CreateSExtOrBitCast(Constant *C, const Type *DestTy) const {
187 if (C->getType() == DestTy)
188 return C; // avoid calling Fold
189 return Fold(ConstantExpr::getSExtOrBitCast(C, DestTy));
191 Constant *CreateTruncOrBitCast(Constant *C, const Type *DestTy) const {
192 if (C->getType() == DestTy)
193 return C; // avoid calling Fold
194 return Fold(ConstantExpr::getTruncOrBitCast(C, DestTy));
197 //===--------------------------------------------------------------------===//
198 // Compare Instructions
199 //===--------------------------------------------------------------------===//
201 Constant *CreateICmp(CmpInst::Predicate P, Constant *LHS,
202 Constant *RHS) const {
203 return Fold(ConstantExpr::getCompare(P, LHS, RHS));
205 Constant *CreateFCmp(CmpInst::Predicate P, Constant *LHS,
206 Constant *RHS) const {
207 return Fold(ConstantExpr::getCompare(P, LHS, RHS));
210 //===--------------------------------------------------------------------===//
211 // Other Instructions
212 //===--------------------------------------------------------------------===//
214 Constant *CreateSelect(Constant *C, Constant *True, Constant *False) const {
215 return Fold(ConstantExpr::getSelect(C, True, False));
218 Constant *CreateExtractElement(Constant *Vec, Constant *Idx) const {
219 return Fold(ConstantExpr::getExtractElement(Vec, Idx));
222 Constant *CreateInsertElement(Constant *Vec, Constant *NewElt,
223 Constant *Idx) const {
224 return Fold(ConstantExpr::getInsertElement(Vec, NewElt, Idx));
227 Constant *CreateShuffleVector(Constant *V1, Constant *V2,
228 Constant *Mask) const {
229 return Fold(ConstantExpr::getShuffleVector(V1, V2, Mask));
232 Constant *CreateExtractValue(Constant *Agg, const unsigned *IdxList,
233 unsigned NumIdx) const {
234 return Fold(ConstantExpr::getExtractValue(Agg, IdxList, NumIdx));
237 Constant *CreateInsertValue(Constant *Agg, Constant *Val,
238 const unsigned *IdxList, unsigned NumIdx) const {
239 return Fold(ConstantExpr::getInsertValue(Agg, Val, IdxList, NumIdx));