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/Instruction.h"
24 #include "llvm/InstrTypes.h"
25 #include "llvm/Analysis/ConstantFolding.h"
32 /// TargetFolder - Create constants with target dependent folding.
37 /// Fold - Fold the constant using target specific information.
38 Constant *Fold(Constant *C) const {
39 if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C))
40 if (Constant *CF = ConstantFoldConstantExpression(CE, Context, TD))
46 explicit TargetFolder(const TargetData *TheTD, LLVMContext &C) :
47 TD(TheTD), Context(C) {}
49 //===--------------------------------------------------------------------===//
51 //===--------------------------------------------------------------------===//
53 Constant *CreateAdd(Constant *LHS, Constant *RHS) const {
54 return Fold(ConstantExpr::getAdd(LHS, RHS));
56 Constant *CreateNSWAdd(Constant *LHS, Constant *RHS) const {
57 return Fold(ConstantExpr::getNSWAdd(LHS, RHS));
59 Constant *CreateFAdd(Constant *LHS, Constant *RHS) const {
60 return Fold(ConstantExpr::getFAdd(LHS, RHS));
62 Constant *CreateSub(Constant *LHS, Constant *RHS) const {
63 return Fold(ConstantExpr::getSub(LHS, RHS));
65 Constant *CreateNSWSub(Constant *LHS, Constant *RHS) const {
66 return Fold(ConstantExpr::getNSWSub(LHS, RHS));
68 Constant *CreateFSub(Constant *LHS, Constant *RHS) const {
69 return Fold(ConstantExpr::getFSub(LHS, RHS));
71 Constant *CreateMul(Constant *LHS, Constant *RHS) const {
72 return Fold(ConstantExpr::getMul(LHS, RHS));
74 Constant *CreateFMul(Constant *LHS, Constant *RHS) const {
75 return Fold(ConstantExpr::getFMul(LHS, RHS));
77 Constant *CreateUDiv(Constant *LHS, Constant *RHS) const {
78 return Fold(ConstantExpr::getUDiv(LHS, RHS));
80 Constant *CreateSDiv(Constant *LHS, Constant *RHS) const {
81 return Fold(ConstantExpr::getSDiv(LHS, RHS));
83 Constant *CreateExactSDiv(Constant *LHS, Constant *RHS) const {
84 return Fold(ConstantExpr::getExactSDiv(LHS, RHS));
86 Constant *CreateFDiv(Constant *LHS, Constant *RHS) const {
87 return Fold(ConstantExpr::getFDiv(LHS, RHS));
89 Constant *CreateURem(Constant *LHS, Constant *RHS) const {
90 return Fold(ConstantExpr::getURem(LHS, RHS));
92 Constant *CreateSRem(Constant *LHS, Constant *RHS) const {
93 return Fold(ConstantExpr::getSRem(LHS, RHS));
95 Constant *CreateFRem(Constant *LHS, Constant *RHS) const {
96 return Fold(ConstantExpr::getFRem(LHS, RHS));
98 Constant *CreateShl(Constant *LHS, Constant *RHS) const {
99 return Fold(ConstantExpr::getShl(LHS, RHS));
101 Constant *CreateLShr(Constant *LHS, Constant *RHS) const {
102 return Fold(ConstantExpr::getLShr(LHS, RHS));
104 Constant *CreateAShr(Constant *LHS, Constant *RHS) const {
105 return Fold(ConstantExpr::getAShr(LHS, RHS));
107 Constant *CreateAnd(Constant *LHS, Constant *RHS) const {
108 return Fold(ConstantExpr::getAnd(LHS, RHS));
110 Constant *CreateOr(Constant *LHS, Constant *RHS) const {
111 return Fold(ConstantExpr::getOr(LHS, RHS));
113 Constant *CreateXor(Constant *LHS, Constant *RHS) const {
114 return Fold(ConstantExpr::getXor(LHS, RHS));
117 Constant *CreateBinOp(Instruction::BinaryOps Opc,
118 Constant *LHS, Constant *RHS) const {
119 return Fold(ConstantExpr::get(Opc, LHS, RHS));
122 //===--------------------------------------------------------------------===//
124 //===--------------------------------------------------------------------===//
126 Constant *CreateNeg(Constant *C) const {
127 return Fold(ConstantExpr::getNeg(C));
129 Constant *CreateFNeg(Constant *C) const {
130 return Fold(ConstantExpr::getFNeg(C));
132 Constant *CreateNot(Constant *C) const {
133 return Fold(ConstantExpr::getNot(C));
136 //===--------------------------------------------------------------------===//
137 // Memory Instructions
138 //===--------------------------------------------------------------------===//
140 Constant *CreateGetElementPtr(Constant *C, Constant* const *IdxList,
141 unsigned NumIdx) const {
142 return Fold(ConstantExpr::getGetElementPtr(C, IdxList, NumIdx));
144 Constant *CreateGetElementPtr(Constant *C, Value* const *IdxList,
145 unsigned NumIdx) const {
146 return Fold(ConstantExpr::getGetElementPtr(C, IdxList, NumIdx));
149 Constant *CreateInBoundsGetElementPtr(Constant *C, Constant* const *IdxList,
150 unsigned NumIdx) const {
151 return Fold(ConstantExpr::getInBoundsGetElementPtr(C, IdxList, NumIdx));
153 Constant *CreateInBoundsGetElementPtr(Constant *C, Value* const *IdxList,
154 unsigned NumIdx) const {
155 return Fold(ConstantExpr::getInBoundsGetElementPtr(C, IdxList, NumIdx));
158 //===--------------------------------------------------------------------===//
159 // Cast/Conversion Operators
160 //===--------------------------------------------------------------------===//
162 Constant *CreateCast(Instruction::CastOps Op, Constant *C,
163 const Type *DestTy) const {
164 if (C->getType() == DestTy)
165 return C; // avoid calling Fold
166 return Fold(ConstantExpr::getCast(Op, C, DestTy));
168 Constant *CreateIntCast(Constant *C, const Type *DestTy,
169 bool isSigned) const {
170 if (C->getType() == DestTy)
171 return C; // avoid calling Fold
172 return Fold(ConstantExpr::getIntegerCast(C, DestTy, isSigned));
175 Constant *CreateBitCast(Constant *C, const Type *DestTy) const {
176 return CreateCast(Instruction::BitCast, C, DestTy);
178 Constant *CreateIntToPtr(Constant *C, const Type *DestTy) const {
179 return CreateCast(Instruction::IntToPtr, C, DestTy);
181 Constant *CreatePtrToInt(Constant *C, const Type *DestTy) const {
182 return CreateCast(Instruction::PtrToInt, C, DestTy);
184 Constant *CreateZExtOrBitCast(Constant *C, const Type *DestTy) const {
185 if (C->getType() == DestTy)
186 return C; // avoid calling Fold
187 return Fold(ConstantExpr::getZExtOrBitCast(C, DestTy));
189 Constant *CreateSExtOrBitCast(Constant *C, const Type *DestTy) const {
190 if (C->getType() == DestTy)
191 return C; // avoid calling Fold
192 return Fold(ConstantExpr::getSExtOrBitCast(C, DestTy));
194 Constant *CreateTruncOrBitCast(Constant *C, const Type *DestTy) const {
195 if (C->getType() == DestTy)
196 return C; // avoid calling Fold
197 return Fold(ConstantExpr::getTruncOrBitCast(C, DestTy));
200 //===--------------------------------------------------------------------===//
201 // Compare Instructions
202 //===--------------------------------------------------------------------===//
204 Constant *CreateICmp(CmpInst::Predicate P, Constant *LHS,
205 Constant *RHS) const {
206 return Fold(ConstantExpr::getCompare(P, LHS, RHS));
208 Constant *CreateFCmp(CmpInst::Predicate P, Constant *LHS,
209 Constant *RHS) const {
210 return Fold(ConstantExpr::getCompare(P, LHS, RHS));
213 //===--------------------------------------------------------------------===//
214 // Other Instructions
215 //===--------------------------------------------------------------------===//
217 Constant *CreateSelect(Constant *C, Constant *True, Constant *False) const {
218 return Fold(ConstantExpr::getSelect(C, True, False));
221 Constant *CreateExtractElement(Constant *Vec, Constant *Idx) const {
222 return Fold(ConstantExpr::getExtractElement(Vec, Idx));
225 Constant *CreateInsertElement(Constant *Vec, Constant *NewElt,
226 Constant *Idx) const {
227 return Fold(ConstantExpr::getInsertElement(Vec, NewElt, Idx));
230 Constant *CreateShuffleVector(Constant *V1, Constant *V2,
231 Constant *Mask) const {
232 return Fold(ConstantExpr::getShuffleVector(V1, V2, Mask));
235 Constant *CreateExtractValue(Constant *Agg, const unsigned *IdxList,
236 unsigned NumIdx) const {
237 return Fold(ConstantExpr::getExtractValue(Agg, IdxList, NumIdx));
240 Constant *CreateInsertValue(Constant *Agg, Constant *Val,
241 const unsigned *IdxList, unsigned NumIdx) const {
242 return Fold(ConstantExpr::getInsertValue(Agg, Val, IdxList, NumIdx));