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 *CreateNSWAdd(Constant *LHS, Constant *RHS) const {
55 return Fold(ConstantExpr::getNSWAdd(LHS, RHS));
57 Constant *CreateFAdd(Constant *LHS, Constant *RHS) const {
58 return Fold(ConstantExpr::getFAdd(LHS, RHS));
60 Constant *CreateSub(Constant *LHS, Constant *RHS) const {
61 return Fold(ConstantExpr::getSub(LHS, RHS));
63 Constant *CreateNSWSub(Constant *LHS, Constant *RHS) const {
64 return Fold(ConstantExpr::getNSWSub(LHS, RHS));
66 Constant *CreateFSub(Constant *LHS, Constant *RHS) const {
67 return Fold(ConstantExpr::getFSub(LHS, RHS));
69 Constant *CreateMul(Constant *LHS, Constant *RHS) const {
70 return Fold(ConstantExpr::getMul(LHS, RHS));
72 Constant *CreateFMul(Constant *LHS, Constant *RHS) const {
73 return Fold(ConstantExpr::getFMul(LHS, RHS));
75 Constant *CreateUDiv(Constant *LHS, Constant *RHS) const {
76 return Fold(ConstantExpr::getUDiv(LHS, RHS));
78 Constant *CreateSDiv(Constant *LHS, Constant *RHS) const {
79 return Fold(ConstantExpr::getSDiv(LHS, RHS));
81 Constant *CreateExactSDiv(Constant *LHS, Constant *RHS) const {
82 return Fold(ConstantExpr::getExactSDiv(LHS, RHS));
84 Constant *CreateFDiv(Constant *LHS, Constant *RHS) const {
85 return Fold(ConstantExpr::getFDiv(LHS, RHS));
87 Constant *CreateURem(Constant *LHS, Constant *RHS) const {
88 return Fold(ConstantExpr::getURem(LHS, RHS));
90 Constant *CreateSRem(Constant *LHS, Constant *RHS) const {
91 return Fold(ConstantExpr::getSRem(LHS, RHS));
93 Constant *CreateFRem(Constant *LHS, Constant *RHS) const {
94 return Fold(ConstantExpr::getFRem(LHS, RHS));
96 Constant *CreateShl(Constant *LHS, Constant *RHS) const {
97 return Fold(ConstantExpr::getShl(LHS, RHS));
99 Constant *CreateLShr(Constant *LHS, Constant *RHS) const {
100 return Fold(ConstantExpr::getLShr(LHS, RHS));
102 Constant *CreateAShr(Constant *LHS, Constant *RHS) const {
103 return Fold(ConstantExpr::getAShr(LHS, RHS));
105 Constant *CreateAnd(Constant *LHS, Constant *RHS) const {
106 return Fold(ConstantExpr::getAnd(LHS, RHS));
108 Constant *CreateOr(Constant *LHS, Constant *RHS) const {
109 return Fold(ConstantExpr::getOr(LHS, RHS));
111 Constant *CreateXor(Constant *LHS, Constant *RHS) const {
112 return Fold(ConstantExpr::getXor(LHS, RHS));
115 Constant *CreateBinOp(Instruction::BinaryOps Opc,
116 Constant *LHS, Constant *RHS) const {
117 return Fold(ConstantExpr::get(Opc, LHS, RHS));
120 //===--------------------------------------------------------------------===//
122 //===--------------------------------------------------------------------===//
124 Constant *CreateNeg(Constant *C) const {
125 return Fold(ConstantExpr::getNeg(C));
127 Constant *CreateFNeg(Constant *C) const {
128 return Fold(ConstantExpr::getFNeg(C));
130 Constant *CreateNot(Constant *C) const {
131 return Fold(ConstantExpr::getNot(C));
134 //===--------------------------------------------------------------------===//
135 // Memory Instructions
136 //===--------------------------------------------------------------------===//
138 Constant *CreateGetElementPtr(Constant *C, Constant* const *IdxList,
139 unsigned NumIdx) const {
140 return Fold(ConstantExpr::getGetElementPtr(C, IdxList, NumIdx));
142 Constant *CreateGetElementPtr(Constant *C, Value* const *IdxList,
143 unsigned NumIdx) const {
144 return Fold(ConstantExpr::getGetElementPtr(C, IdxList, NumIdx));
147 Constant *CreateInBoundsGetElementPtr(Constant *C, Constant* const *IdxList,
148 unsigned NumIdx) const {
149 return Fold(ConstantExpr::getInBoundsGetElementPtr(C, IdxList, NumIdx));
151 Constant *CreateInBoundsGetElementPtr(Constant *C, Value* const *IdxList,
152 unsigned NumIdx) const {
153 return Fold(ConstantExpr::getInBoundsGetElementPtr(C, IdxList, NumIdx));
156 //===--------------------------------------------------------------------===//
157 // Cast/Conversion Operators
158 //===--------------------------------------------------------------------===//
160 Constant *CreateCast(Instruction::CastOps Op, Constant *C,
161 const Type *DestTy) const {
162 if (C->getType() == DestTy)
163 return C; // avoid calling Fold
164 return Fold(ConstantExpr::getCast(Op, C, DestTy));
166 Constant *CreateIntCast(Constant *C, const Type *DestTy,
167 bool isSigned) const {
168 if (C->getType() == DestTy)
169 return C; // avoid calling Fold
170 return Fold(ConstantExpr::getIntegerCast(C, DestTy, isSigned));
173 Constant *CreateBitCast(Constant *C, const Type *DestTy) const {
174 return CreateCast(Instruction::BitCast, C, DestTy);
176 Constant *CreateIntToPtr(Constant *C, const Type *DestTy) const {
177 return CreateCast(Instruction::IntToPtr, C, DestTy);
179 Constant *CreatePtrToInt(Constant *C, const Type *DestTy) const {
180 return CreateCast(Instruction::PtrToInt, C, DestTy);
182 Constant *CreateTruncOrBitCast(Constant *C, const Type *DestTy) const {
183 if (C->getType() == DestTy)
184 return C; // avoid calling Fold
185 return Fold(ConstantExpr::getTruncOrBitCast(C, DestTy));
188 //===--------------------------------------------------------------------===//
189 // Compare Instructions
190 //===--------------------------------------------------------------------===//
192 Constant *CreateICmp(CmpInst::Predicate P, Constant *LHS,
193 Constant *RHS) const {
194 return Fold(ConstantExpr::getCompare(P, LHS, RHS));
196 Constant *CreateFCmp(CmpInst::Predicate P, Constant *LHS,
197 Constant *RHS) const {
198 return Fold(ConstantExpr::getCompare(P, LHS, RHS));
201 //===--------------------------------------------------------------------===//
202 // Other Instructions
203 //===--------------------------------------------------------------------===//
205 Constant *CreateSelect(Constant *C, Constant *True, Constant *False) const {
206 return Fold(ConstantExpr::getSelect(C, True, False));
209 Constant *CreateExtractElement(Constant *Vec, Constant *Idx) const {
210 return Fold(ConstantExpr::getExtractElement(Vec, Idx));
213 Constant *CreateInsertElement(Constant *Vec, Constant *NewElt,
214 Constant *Idx) const {
215 return Fold(ConstantExpr::getInsertElement(Vec, NewElt, Idx));
218 Constant *CreateShuffleVector(Constant *V1, Constant *V2,
219 Constant *Mask) const {
220 return Fold(ConstantExpr::getShuffleVector(V1, V2, Mask));
223 Constant *CreateExtractValue(Constant *Agg, const unsigned *IdxList,
224 unsigned NumIdx) const {
225 return Fold(ConstantExpr::getExtractValue(Agg, IdxList, NumIdx));
228 Constant *CreateInsertValue(Constant *Agg, Constant *Val,
229 const unsigned *IdxList, unsigned NumIdx) const {
230 return Fold(ConstantExpr::getInsertValue(Agg, Val, IdxList, NumIdx));