ConstantFolder.h revision c12d4c93f94e271d32e60fae1d521c4fca39ae1e 
1//===-- llvm/Support/ConstantFolder.h - Constant folding helper -*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file defines the ConstantFolder class, a helper for IRBuilder.
11// It provides IRBuilder with a set of methods for creating constants
12// with minimal folding.  For general constant creation and folding,
13// use ConstantExpr and the routines in llvm/Analysis/ConstantFolding.h.
14//
15//===----------------------------------------------------------------------===//
16
17#ifndef LLVM_SUPPORT_CONSTANTFOLDER_H
18#define LLVM_SUPPORT_CONSTANTFOLDER_H
19
20#include "llvm/Constants.h"
21#include "llvm/InstrTypes.h"
22
23namespace llvm {
24
25/// ConstantFolder - Create constants with minimum, target independent, folding.
26class ConstantFolder {
27public:
28  explicit ConstantFolder() {}
29
30  //===--------------------------------------------------------------------===//
31  // Binary Operators
32  //===--------------------------------------------------------------------===//
33
34  Constant *CreateAdd(Constant *LHS, Constant *RHS,
35                      bool HasNUW = false, bool HasNSW = false) const {
36    return ConstantExpr::getAdd(LHS, RHS, HasNUW, HasNSW);
37  }
38  Constant *CreateFAdd(Constant *LHS, Constant *RHS) const {
39    return ConstantExpr::getFAdd(LHS, RHS);
40  }
41  Constant *CreateSub(Constant *LHS, Constant *RHS,
42                      bool HasNUW = false, bool HasNSW = false) const {
43    return ConstantExpr::getSub(LHS, RHS, HasNUW, HasNSW);
44  }
45  Constant *CreateFSub(Constant *LHS, Constant *RHS) const {
46    return ConstantExpr::getFSub(LHS, RHS);
47  }
48  Constant *CreateMul(Constant *LHS, Constant *RHS,
49                      bool HasNUW = false, bool HasNSW = false) const {
50    return ConstantExpr::getMul(LHS, RHS, HasNUW, HasNSW);
51  }
52  Constant *CreateFMul(Constant *LHS, Constant *RHS) const {
53    return ConstantExpr::getFMul(LHS, RHS);
54  }
55  Constant *CreateUDiv(Constant *LHS, Constant *RHS,
56                       bool isExact = false) const {
57    return ConstantExpr::getUDiv(LHS, RHS, isExact);
58  }
59  Constant *CreateSDiv(Constant *LHS, Constant *RHS,
60                       bool isExact = false) const {
61    return ConstantExpr::getSDiv(LHS, RHS, isExact);
62  }
63  Constant *CreateFDiv(Constant *LHS, Constant *RHS) const {
64    return ConstantExpr::getFDiv(LHS, RHS);
65  }
66  Constant *CreateURem(Constant *LHS, Constant *RHS) const {
67    return ConstantExpr::getURem(LHS, RHS);
68  }
69  Constant *CreateSRem(Constant *LHS, Constant *RHS) const {
70    return ConstantExpr::getSRem(LHS, RHS);
71  }
72  Constant *CreateFRem(Constant *LHS, Constant *RHS) const {
73    return ConstantExpr::getFRem(LHS, RHS);
74  }
75  Constant *CreateShl(Constant *LHS, Constant *RHS,
76                      bool HasNUW = false, bool HasNSW = false) const {
77    return ConstantExpr::getShl(LHS, RHS, HasNUW, HasNSW);
78  }
79  Constant *CreateLShr(Constant *LHS, Constant *RHS,
80                       bool isExact = false) const {
81    return ConstantExpr::getLShr(LHS, RHS, isExact);
82  }
83  Constant *CreateAShr(Constant *LHS, Constant *RHS,
84                       bool isExact = false) const {
85    return ConstantExpr::getAShr(LHS, RHS, isExact);
86  }
87  Constant *CreateAnd(Constant *LHS, Constant *RHS) const {
88    return ConstantExpr::getAnd(LHS, RHS);
89  }
90  Constant *CreateOr(Constant *LHS, Constant *RHS) const {
91    return ConstantExpr::getOr(LHS, RHS);
92  }
93  Constant *CreateXor(Constant *LHS, Constant *RHS) const {
94    return ConstantExpr::getXor(LHS, RHS);
95  }
96
97  Constant *CreateBinOp(Instruction::BinaryOps Opc,
98                        Constant *LHS, Constant *RHS) const {
99    return ConstantExpr::get(Opc, LHS, RHS);
100  }
101
102  //===--------------------------------------------------------------------===//
103  // Unary Operators
104  //===--------------------------------------------------------------------===//
105
106  Constant *CreateNeg(Constant *C,
107                      bool HasNUW = false, bool HasNSW = false) const {
108    return ConstantExpr::getNeg(C, HasNUW, HasNSW);
109  }
110  Constant *CreateFNeg(Constant *C) const {
111    return ConstantExpr::getFNeg(C);
112  }
113  Constant *CreateNot(Constant *C) const {
114    return ConstantExpr::getNot(C);
115  }
116
117  //===--------------------------------------------------------------------===//
118  // Memory Instructions
119  //===--------------------------------------------------------------------===//
120
121  Constant *CreateGetElementPtr(Constant *C, Constant* const *IdxList,
122                                unsigned NumIdx) const {
123    return ConstantExpr::getGetElementPtr(C, IdxList, NumIdx);
124  }
125  Constant *CreateGetElementPtr(Constant *C, Value* const *IdxList,
126                                unsigned NumIdx) const {
127    return ConstantExpr::getGetElementPtr(C, IdxList, NumIdx);
128  }
129
130  Constant *CreateInBoundsGetElementPtr(Constant *C, Constant* const *IdxList,
131                                        unsigned NumIdx) const {
132    return ConstantExpr::getInBoundsGetElementPtr(C, IdxList, NumIdx);
133  }
134  Constant *CreateInBoundsGetElementPtr(Constant *C, Value* const *IdxList,
135                                        unsigned NumIdx) const {
136    return ConstantExpr::getInBoundsGetElementPtr(C, IdxList, NumIdx);
137  }
138
139  //===--------------------------------------------------------------------===//
140  // Cast/Conversion Operators
141  //===--------------------------------------------------------------------===//
142
143  Constant *CreateCast(Instruction::CastOps Op, Constant *C,
144                       const Type *DestTy) const {
145    return ConstantExpr::getCast(Op, C, DestTy);
146  }
147  Constant *CreatePointerCast(Constant *C, const Type *DestTy) const {
148    return ConstantExpr::getPointerCast(C, DestTy);
149  }
150  Constant *CreateIntCast(Constant *C, const Type *DestTy,
151                          bool isSigned) const {
152    return ConstantExpr::getIntegerCast(C, DestTy, isSigned);
153  }
154  Constant *CreateFPCast(Constant *C, const Type *DestTy) const {
155    return ConstantExpr::getFPCast(C, DestTy);
156  }
157
158  Constant *CreateBitCast(Constant *C, const Type *DestTy) const {
159    return CreateCast(Instruction::BitCast, C, DestTy);
160  }
161  Constant *CreateIntToPtr(Constant *C, const Type *DestTy) const {
162    return CreateCast(Instruction::IntToPtr, C, DestTy);
163  }
164  Constant *CreatePtrToInt(Constant *C, const Type *DestTy) const {
165    return CreateCast(Instruction::PtrToInt, C, DestTy);
166  }
167  Constant *CreateZExtOrBitCast(Constant *C, const Type *DestTy) const {
168    return ConstantExpr::getZExtOrBitCast(C, DestTy);
169  }
170  Constant *CreateSExtOrBitCast(Constant *C, const Type *DestTy) const {
171    return ConstantExpr::getSExtOrBitCast(C, DestTy);
172  }
173
174  Constant *CreateTruncOrBitCast(Constant *C, const Type *DestTy) const {
175    return ConstantExpr::getTruncOrBitCast(C, DestTy);
176  }
177
178  //===--------------------------------------------------------------------===//
179  // Compare Instructions
180  //===--------------------------------------------------------------------===//
181
182  Constant *CreateICmp(CmpInst::Predicate P, Constant *LHS,
183                       Constant *RHS) const {
184    return ConstantExpr::getCompare(P, LHS, RHS);
185  }
186  Constant *CreateFCmp(CmpInst::Predicate P, Constant *LHS,
187                       Constant *RHS) const {
188    return ConstantExpr::getCompare(P, LHS, RHS);
189  }
190
191  //===--------------------------------------------------------------------===//
192  // Other Instructions
193  //===--------------------------------------------------------------------===//
194
195  Constant *CreateSelect(Constant *C, Constant *True, Constant *False) const {
196    return ConstantExpr::getSelect(C, True, False);
197  }
198
199  Constant *CreateExtractElement(Constant *Vec, Constant *Idx) const {
200    return ConstantExpr::getExtractElement(Vec, Idx);
201  }
202
203  Constant *CreateInsertElement(Constant *Vec, Constant *NewElt,
204                                Constant *Idx) const {
205    return ConstantExpr::getInsertElement(Vec, NewElt, Idx);
206  }
207
208  Constant *CreateShuffleVector(Constant *V1, Constant *V2,
209                                Constant *Mask) const {
210    return ConstantExpr::getShuffleVector(V1, V2, Mask);
211  }
212
213  Constant *CreateExtractValue(Constant *Agg, const unsigned *IdxList,
214                               unsigned NumIdx) const {
215    return ConstantExpr::getExtractValue(Agg, IdxList, NumIdx);
216  }
217
218  Constant *CreateInsertValue(Constant *Agg, Constant *Val,
219                              const unsigned *IdxList, unsigned NumIdx) const {
220    return ConstantExpr::getInsertValue(Agg, Val, IdxList, NumIdx);
221  }
222};
223
224}
225
226#endif
227