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
|
#pragma once
#ifdef __GNUC__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-parameter"
#endif
//===-- llvm/OperandTraits.h - OperandTraits class definition ---*- 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 traits classes that are handy for enforcing the correct
// layout of various User subclasses. It also provides the means for accessing
// the operands in the most efficient manner.
//
#ifndef LLVM_IR_OPERANDTRAITS_H
#define LLVM_IR_OPERANDTRAITS_H
#include "llvm/IR/User.h"
namespace llvm {
//===----------------------------------------------------------------------===//
// FixedNumOperand Trait Class
//===----------------------------------------------------------------------===//
/// FixedNumOperandTraits - determine the allocation regime of the Use array
/// when it is a prefix to the User object, and the number of Use objects is
/// known at compile time.
template <typename SubClass, unsigned ARITY>
struct FixedNumOperandTraits {
static Use *op_begin(SubClass* U) {
static_assert(
!std::is_polymorphic<SubClass>::value,
"adding virtual methods to subclasses of User breaks use lists");
return reinterpret_cast<Use*>(U) - ARITY;
}
static Use *op_end(SubClass* U) {
return reinterpret_cast<Use*>(U);
}
static unsigned operands(const User*) {
return ARITY;
}
};
//===----------------------------------------------------------------------===//
// OptionalOperand Trait Class
//===----------------------------------------------------------------------===//
/// OptionalOperandTraits - when the number of operands may change at runtime.
/// Naturally it may only decrease, because the allocations may not change.
template <typename SubClass, unsigned ARITY = 1>
struct OptionalOperandTraits : public FixedNumOperandTraits<SubClass, ARITY> {
static unsigned operands(const User *U) {
return U->getNumOperands();
}
};
//===----------------------------------------------------------------------===//
// VariadicOperand Trait Class
//===----------------------------------------------------------------------===//
/// VariadicOperandTraits - determine the allocation regime of the Use array
/// when it is a prefix to the User object, and the number of Use objects is
/// only known at allocation time.
template <typename SubClass, unsigned MINARITY = 0>
struct VariadicOperandTraits {
static Use *op_begin(SubClass* U) {
static_assert(
!std::is_polymorphic<SubClass>::value,
"adding virtual methods to subclasses of User breaks use lists");
return reinterpret_cast<Use*>(U) - static_cast<User*>(U)->getNumOperands();
}
static Use *op_end(SubClass* U) {
return reinterpret_cast<Use*>(U);
}
static unsigned operands(const User *U) {
return U->getNumOperands();
}
};
//===----------------------------------------------------------------------===//
// HungoffOperand Trait Class
//===----------------------------------------------------------------------===//
/// HungoffOperandTraits - determine the allocation regime of the Use array
/// when it is not a prefix to the User object, but allocated at an unrelated
/// heap address.
///
/// This is the traits class that is needed when the Use array must be
/// resizable.
template <unsigned MINARITY = 1>
struct HungoffOperandTraits {
static Use *op_begin(User* U) {
return U->getOperandList();
}
static Use *op_end(User* U) {
return U->getOperandList() + U->getNumOperands();
}
static unsigned operands(const User *U) {
return U->getNumOperands();
}
};
/// Macro for generating in-class operand accessor declarations.
/// It should only be called in the public section of the interface.
///
#define DECLARE_TRANSPARENT_OPERAND_ACCESSORS(VALUECLASS) \
public: \
inline VALUECLASS *getOperand(unsigned) const; \
inline void setOperand(unsigned, VALUECLASS*); \
inline op_iterator op_begin(); \
inline const_op_iterator op_begin() const; \
inline op_iterator op_end(); \
inline const_op_iterator op_end() const; \
protected: \
template <int> inline Use &Op(); \
template <int> inline const Use &Op() const; \
public: \
inline unsigned getNumOperands() const
/// Macro for generating out-of-class operand accessor definitions
#define DEFINE_TRANSPARENT_OPERAND_ACCESSORS(CLASS, VALUECLASS) \
CLASS::op_iterator CLASS::op_begin() { \
return OperandTraits<CLASS>::op_begin(this); \
} \
CLASS::const_op_iterator CLASS::op_begin() const { \
return OperandTraits<CLASS>::op_begin(const_cast<CLASS*>(this)); \
} \
CLASS::op_iterator CLASS::op_end() { \
return OperandTraits<CLASS>::op_end(this); \
} \
CLASS::const_op_iterator CLASS::op_end() const { \
return OperandTraits<CLASS>::op_end(const_cast<CLASS*>(this)); \
} \
VALUECLASS *CLASS::getOperand(unsigned i_nocapture) const { \
assert(i_nocapture < OperandTraits<CLASS>::operands(this) \
&& "getOperand() out of range!"); \
return cast_or_null<VALUECLASS>( \
OperandTraits<CLASS>::op_begin(const_cast<CLASS*>(this))[i_nocapture].get()); \
} \
void CLASS::setOperand(unsigned i_nocapture, VALUECLASS *Val_nocapture) { \
assert(i_nocapture < OperandTraits<CLASS>::operands(this) \
&& "setOperand() out of range!"); \
OperandTraits<CLASS>::op_begin(this)[i_nocapture] = Val_nocapture; \
} \
unsigned CLASS::getNumOperands() const { \
return OperandTraits<CLASS>::operands(this); \
} \
template <int Idx_nocapture> Use &CLASS::Op() { \
return this->OpFrom<Idx_nocapture>(this); \
} \
template <int Idx_nocapture> const Use &CLASS::Op() const { \
return this->OpFrom<Idx_nocapture>(this); \
}
} // End llvm namespace
#endif
#ifdef __GNUC__
#pragma GCC diagnostic pop
#endif
|
