1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
|
#pragma once
#ifdef __GNUC__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-parameter"
#endif
//===- InstSimplifyFolder.h - InstSimplify folding helper --------*- C++-*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file defines the InstSimplifyFolder class, a helper for IRBuilder.
// It provides IRBuilder with a set of methods for folding operations to
// existing values using InstructionSimplify. At the moment, only a subset of
// the implementation uses InstructionSimplify. The rest of the implementation
// only folds constants.
//
// The folder also applies target-specific constant folding.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_ANALYSIS_INSTSIMPLIFYFOLDER_H
#define LLVM_ANALYSIS_INSTSIMPLIFYFOLDER_H
#include "llvm/ADT/ArrayRef.h"
#include "llvm/Analysis/InstructionSimplify.h"
#include "llvm/Analysis/TargetFolder.h"
#include "llvm/IR/IRBuilderFolder.h"
#include "llvm/IR/Instruction.h"
namespace llvm {
class Constant;
/// InstSimplifyFolder - Use InstructionSimplify to fold operations to existing
/// values. Also applies target-specific constant folding when not using
/// InstructionSimplify.
class InstSimplifyFolder final : public IRBuilderFolder {
TargetFolder ConstFolder;
SimplifyQuery SQ;
virtual void anchor();
public:
InstSimplifyFolder(const DataLayout &DL) : ConstFolder(DL), SQ(DL) {}
//===--------------------------------------------------------------------===//
// Value-based folders.
//
// Return an existing value or a constant if the operation can be simplified.
// Otherwise return nullptr.
//===--------------------------------------------------------------------===//
Value *FoldBinOp(Instruction::BinaryOps Opc, Value *LHS,
Value *RHS) const override {
return simplifyBinOp(Opc, LHS, RHS, SQ);
}
Value *FoldExactBinOp(Instruction::BinaryOps Opc, Value *LHS, Value *RHS,
bool IsExact) const override {
return simplifyBinOp(Opc, LHS, RHS, SQ);
}
Value *FoldNoWrapBinOp(Instruction::BinaryOps Opc, Value *LHS, Value *RHS,
bool HasNUW, bool HasNSW) const override {
return simplifyBinOp(Opc, LHS, RHS, SQ);
}
Value *FoldBinOpFMF(Instruction::BinaryOps Opc, Value *LHS, Value *RHS,
FastMathFlags FMF) const override {
return simplifyBinOp(Opc, LHS, RHS, FMF, SQ);
}
Value *FoldUnOpFMF(Instruction::UnaryOps Opc, Value *V,
FastMathFlags FMF) const override {
return simplifyUnOp(Opc, V, FMF, SQ);
}
Value *FoldICmp(CmpInst::Predicate P, Value *LHS, Value *RHS) const override {
return simplifyICmpInst(P, LHS, RHS, SQ);
}
Value *FoldGEP(Type *Ty, Value *Ptr, ArrayRef<Value *> IdxList,
bool IsInBounds = false) const override {
return simplifyGEPInst(Ty, Ptr, IdxList, IsInBounds, SQ);
}
Value *FoldSelect(Value *C, Value *True, Value *False) const override {
return simplifySelectInst(C, True, False, SQ);
}
Value *FoldExtractValue(Value *Agg,
ArrayRef<unsigned> IdxList) const override {
return simplifyExtractValueInst(Agg, IdxList, SQ);
};
Value *FoldInsertValue(Value *Agg, Value *Val,
ArrayRef<unsigned> IdxList) const override {
return simplifyInsertValueInst(Agg, Val, IdxList, SQ);
}
Value *FoldExtractElement(Value *Vec, Value *Idx) const override {
return simplifyExtractElementInst(Vec, Idx, SQ);
}
Value *FoldInsertElement(Value *Vec, Value *NewElt,
Value *Idx) const override {
return simplifyInsertElementInst(Vec, NewElt, Idx, SQ);
}
Value *FoldShuffleVector(Value *V1, Value *V2,
ArrayRef<int> Mask) const override {
Type *RetTy = VectorType::get(
cast<VectorType>(V1->getType())->getElementType(), Mask.size(),
isa<ScalableVectorType>(V1->getType()));
return simplifyShuffleVectorInst(V1, V2, Mask, RetTy, SQ);
}
//===--------------------------------------------------------------------===//
// Cast/Conversion Operators
//===--------------------------------------------------------------------===//
Value *CreateCast(Instruction::CastOps Op, Constant *C,
Type *DestTy) const override {
if (C->getType() == DestTy)
return C; // avoid calling Fold
return ConstFolder.CreateCast(Op, C, DestTy);
}
Value *CreateIntCast(Constant *C, Type *DestTy,
bool isSigned) const override {
if (C->getType() == DestTy)
return C; // avoid calling Fold
return ConstFolder.CreateIntCast(C, DestTy, isSigned);
}
Value *CreatePointerCast(Constant *C, Type *DestTy) const override {
if (C->getType() == DestTy)
return C; // avoid calling Fold
return ConstFolder.CreatePointerCast(C, DestTy);
}
Value *CreateFPCast(Constant *C, Type *DestTy) const override {
if (C->getType() == DestTy)
return C; // avoid calling Fold
return ConstFolder.CreateFPCast(C, DestTy);
}
Value *CreateBitCast(Constant *C, Type *DestTy) const override {
return ConstFolder.CreateBitCast(C, DestTy);
}
Value *CreateIntToPtr(Constant *C, Type *DestTy) const override {
return ConstFolder.CreateIntToPtr(C, DestTy);
}
Value *CreatePtrToInt(Constant *C, Type *DestTy) const override {
return ConstFolder.CreatePtrToInt(C, DestTy);
}
Value *CreateZExtOrBitCast(Constant *C, Type *DestTy) const override {
if (C->getType() == DestTy)
return C; // avoid calling Fold
return ConstFolder.CreateZExtOrBitCast(C, DestTy);
}
Value *CreateSExtOrBitCast(Constant *C, Type *DestTy) const override {
if (C->getType() == DestTy)
return C; // avoid calling Fold
return ConstFolder.CreateSExtOrBitCast(C, DestTy);
}
Value *CreateTruncOrBitCast(Constant *C, Type *DestTy) const override {
if (C->getType() == DestTy)
return C; // avoid calling Fold
return ConstFolder.CreateTruncOrBitCast(C, DestTy);
}
Value *CreatePointerBitCastOrAddrSpaceCast(Constant *C,
Type *DestTy) const override {
if (C->getType() == DestTy)
return C; // avoid calling Fold
return ConstFolder.CreatePointerBitCastOrAddrSpaceCast(C, DestTy);
}
//===--------------------------------------------------------------------===//
// Compare Instructions
//===--------------------------------------------------------------------===//
Value *CreateFCmp(CmpInst::Predicate P, Constant *LHS,
Constant *RHS) const override {
return ConstFolder.CreateFCmp(P, LHS, RHS);
}
};
} // end namespace llvm
#endif // LLVM_ANALYSIS_INSTSIMPLIFYFOLDER_H
#ifdef __GNUC__
#pragma GCC diagnostic pop
#endif
|
