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(Context.getConstantExprAdd(LHS, RHS));
54 Constant *CreateFAdd(Constant *LHS, Constant *RHS) const {
55 return Fold(Context.getConstantExprFAdd(LHS, RHS));
57 Constant *CreateSub(Constant *LHS, Constant *RHS) const {
58 return Fold(Context.getConstantExprSub(LHS, RHS));
60 Constant *CreateFSub(Constant *LHS, Constant *RHS) const {
61 return Fold(Context.getConstantExprFSub(LHS, RHS));
63 Constant *CreateMul(Constant *LHS, Constant *RHS) const {
64 return Fold(Context.getConstantExprMul(LHS, RHS));
66 Constant *CreateFMul(Constant *LHS, Constant *RHS) const {
67 return Fold(Context.getConstantExprFMul(LHS, RHS));
69 Constant *CreateUDiv(Constant *LHS, Constant *RHS) const {
70 return Fold(Context.getConstantExprUDiv(LHS, RHS));
72 Constant *CreateSDiv(Constant *LHS, Constant *RHS) const {
73 return Fold(Context.getConstantExprSDiv(LHS, RHS));
75 Constant *CreateFDiv(Constant *LHS, Constant *RHS) const {
76 return Fold(Context.getConstantExprFDiv(LHS, RHS));
78 Constant *CreateURem(Constant *LHS, Constant *RHS) const {
79 return Fold(Context.getConstantExprURem(LHS, RHS));
81 Constant *CreateSRem(Constant *LHS, Constant *RHS) const {
82 return Fold(Context.getConstantExprSRem(LHS, RHS));
84 Constant *CreateFRem(Constant *LHS, Constant *RHS) const {
85 return Fold(Context.getConstantExprFRem(LHS, RHS));
87 Constant *CreateShl(Constant *LHS, Constant *RHS) const {
88 return Fold(Context.getConstantExprShl(LHS, RHS));
90 Constant *CreateLShr(Constant *LHS, Constant *RHS) const {
91 return Fold(Context.getConstantExprLShr(LHS, RHS));
93 Constant *CreateAShr(Constant *LHS, Constant *RHS) const {
94 return Fold(Context.getConstantExprAShr(LHS, RHS));
96 Constant *CreateAnd(Constant *LHS, Constant *RHS) const {
97 return Fold(Context.getConstantExprAnd(LHS, RHS));
99 Constant *CreateOr(Constant *LHS, Constant *RHS) const {
100 return Fold(Context.getConstantExprOr(LHS, RHS));
102 Constant *CreateXor(Constant *LHS, Constant *RHS) const {
103 return Fold(Context.getConstantExprXor(LHS, RHS));
106 Constant *CreateBinOp(Instruction::BinaryOps Opc,
107 Constant *LHS, Constant *RHS) const {
108 return Fold(Context.getConstantExpr(Opc, LHS, RHS));
111 //===--------------------------------------------------------------------===//
113 //===--------------------------------------------------------------------===//
115 Constant *CreateNeg(Constant *C) const {
116 return Fold(Context.getConstantExprNeg(C));
118 Constant *CreateFNeg(Constant *C) const {
119 return Fold(Context.getConstantExprFNeg(C));
121 Constant *CreateNot(Constant *C) const {
122 return Fold(Context.getConstantExprNot(C));
125 //===--------------------------------------------------------------------===//
126 // Memory Instructions
127 //===--------------------------------------------------------------------===//
129 Constant *CreateGetElementPtr(Constant *C, Constant* const *IdxList,
130 unsigned NumIdx) const {
131 return Fold(Context.getConstantExprGetElementPtr(C, IdxList, NumIdx));
133 Constant *CreateGetElementPtr(Constant *C, Value* const *IdxList,
134 unsigned NumIdx) const {
135 return Fold(Context.getConstantExprGetElementPtr(C, IdxList, NumIdx));
138 //===--------------------------------------------------------------------===//
139 // Cast/Conversion Operators
140 //===--------------------------------------------------------------------===//
142 Constant *CreateCast(Instruction::CastOps Op, Constant *C,
143 const Type *DestTy) const {
144 if (C->getType() == DestTy)
145 return C; // avoid calling Fold
146 return Fold(Context.getConstantExprCast(Op, C, DestTy));
148 Constant *CreateIntCast(Constant *C, const Type *DestTy,
149 bool isSigned) const {
150 if (C->getType() == DestTy)
151 return C; // avoid calling Fold
152 return Fold(Context.getConstantExprIntegerCast(C, DestTy, isSigned));
155 Constant *CreateBitCast(Constant *C, const Type *DestTy) const {
156 return CreateCast(Instruction::BitCast, C, DestTy);
158 Constant *CreateIntToPtr(Constant *C, const Type *DestTy) const {
159 return CreateCast(Instruction::IntToPtr, C, DestTy);
161 Constant *CreatePtrToInt(Constant *C, const Type *DestTy) const {
162 return CreateCast(Instruction::PtrToInt, C, DestTy);
164 Constant *CreateTruncOrBitCast(Constant *C, const Type *DestTy) const {
165 if (C->getType() == DestTy)
166 return C; // avoid calling Fold
167 return Fold(Context.getConstantExprTruncOrBitCast(C, DestTy));
170 //===--------------------------------------------------------------------===//
171 // Compare Instructions
172 //===--------------------------------------------------------------------===//
174 Constant *CreateICmp(CmpInst::Predicate P, Constant *LHS,
175 Constant *RHS) const {
176 return Fold(Context.getConstantExprCompare(P, LHS, RHS));
178 Constant *CreateFCmp(CmpInst::Predicate P, Constant *LHS,
179 Constant *RHS) const {
180 return Fold(Context.getConstantExprCompare(P, LHS, RHS));
183 //===--------------------------------------------------------------------===//
184 // Other Instructions
185 //===--------------------------------------------------------------------===//
187 Constant *CreateSelect(Constant *C, Constant *True, Constant *False) const {
188 return Fold(Context.getConstantExprSelect(C, True, False));
191 Constant *CreateExtractElement(Constant *Vec, Constant *Idx) const {
192 return Fold(Context.getConstantExprExtractElement(Vec, Idx));
195 Constant *CreateInsertElement(Constant *Vec, Constant *NewElt,
196 Constant *Idx) const {
197 return Fold(Context.getConstantExprInsertElement(Vec, NewElt, Idx));
200 Constant *CreateShuffleVector(Constant *V1, Constant *V2,
201 Constant *Mask) const {
202 return Fold(Context.getConstantExprShuffleVector(V1, V2, Mask));
205 Constant *CreateExtractValue(Constant *Agg, const unsigned *IdxList,
206 unsigned NumIdx) const {
207 return Fold(Context.getConstantExprExtractValue(Agg, IdxList, NumIdx));
210 Constant *CreateInsertValue(Constant *Agg, Constant *Val,
211 const unsigned *IdxList, unsigned NumIdx) const {
212 return Fold(Context.getConstantExprInsertValue(Agg, Val, IdxList, NumIdx));