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
|
//===-------- llvm/GlobalAlias.h - GlobalAlias class ------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains the declaration of the GlobalAlias class, which
// represents a single function or variable alias in the IR.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_IR_GLOBALALIAS_H
#define LLVM_IR_GLOBALALIAS_H
#include "llvm/ADT/Twine.h"
#include "llvm/ADT/ilist_node.h"
#include "llvm/IR/GlobalValue.h"
#include "llvm/IR/OperandTraits.h"
namespace llvm {
class Module;
template<typename ValueSubClass, typename ItemParentClass>
class SymbolTableListTraits;
class GlobalAlias : public GlobalValue, public ilist_node<GlobalAlias> {
friend class SymbolTableListTraits<GlobalAlias, Module>;
void operator=(const GlobalAlias &) = delete;
GlobalAlias(const GlobalAlias &) = delete;
void setParent(Module *parent);
GlobalAlias(Type *Ty, unsigned AddressSpace, LinkageTypes Linkage,
const Twine &Name, Constant *Aliasee, Module *Parent);
public:
// allocate space for exactly one operand
void *operator new(size_t s) {
return User::operator new(s, 1);
}
/// If a parent module is specified, the alias is automatically inserted into
/// the end of the specified module's alias list.
static GlobalAlias *create(Type *Ty, unsigned AddressSpace,
LinkageTypes Linkage, const Twine &Name,
Constant *Aliasee, Module *Parent);
// Without the Aliasee.
static GlobalAlias *create(Type *Ty, unsigned AddressSpace,
LinkageTypes Linkage, const Twine &Name,
Module *Parent);
// The module is taken from the Aliasee.
static GlobalAlias *create(Type *Ty, unsigned AddressSpace,
LinkageTypes Linkage, const Twine &Name,
GlobalValue *Aliasee);
// Type, Parent and AddressSpace taken from the Aliasee.
static GlobalAlias *create(LinkageTypes Linkage, const Twine &Name,
GlobalValue *Aliasee);
// Linkage, Type, Parent and AddressSpace taken from the Aliasee.
static GlobalAlias *create(const Twine &Name, GlobalValue *Aliasee);
/// Provide fast operand accessors
DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Constant);
/// removeFromParent - This method unlinks 'this' from the containing module,
/// but does not delete it.
///
void removeFromParent() override;
/// eraseFromParent - This method unlinks 'this' from the containing module
/// and deletes it.
///
void eraseFromParent() override;
/// These methods retrive and set alias target.
void setAliasee(Constant *Aliasee);
const Constant *getAliasee() const {
return const_cast<GlobalAlias *>(this)->getAliasee();
}
Constant *getAliasee() {
return getOperand(0);
}
const GlobalObject *getBaseObject() const {
return const_cast<GlobalAlias *>(this)->getBaseObject();
}
GlobalObject *getBaseObject() {
return dyn_cast<GlobalObject>(getAliasee()->stripInBoundsOffsets());
}
const GlobalObject *getBaseObject(const DataLayout &DL, APInt &Offset) const {
return const_cast<GlobalAlias *>(this)->getBaseObject(DL, Offset);
}
GlobalObject *getBaseObject(const DataLayout &DL, APInt &Offset) {
return dyn_cast<GlobalObject>(
getAliasee()->stripAndAccumulateInBoundsConstantOffsets(DL, Offset));
}
static bool isValidLinkage(LinkageTypes L) {
return isExternalLinkage(L) || isLocalLinkage(L) ||
isWeakLinkage(L) || isLinkOnceLinkage(L);
}
// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const Value *V) {
return V->getValueID() == Value::GlobalAliasVal;
}
};
template <>
struct OperandTraits<GlobalAlias> :
public FixedNumOperandTraits<GlobalAlias, 1> {
};
DEFINE_TRANSPARENT_OPERAND_ACCESSORS(GlobalAlias, Constant)
} // End llvm namespace
#endif
|
