You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
94 lines
3.1 KiB
94 lines
3.1 KiB
//===-------- 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_GLOBAL_ALIAS_H
|
|
#define LLVM_GLOBAL_ALIAS_H
|
|
|
|
#include "llvm/GlobalValue.h"
|
|
#include "llvm/OperandTraits.h"
|
|
#include "llvm/ADT/ilist_node.h"
|
|
#include "llvm/ADT/Twine.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 &) LLVM_DELETED_FUNCTION;
|
|
GlobalAlias(const GlobalAlias &) LLVM_DELETED_FUNCTION;
|
|
|
|
void setParent(Module *parent);
|
|
|
|
public:
|
|
// allocate space for exactly one operand
|
|
void *operator new(size_t s) {
|
|
return User::operator new(s, 1);
|
|
}
|
|
/// GlobalAlias ctor - If a parent module is specified, the alias is
|
|
/// automatically inserted into the end of the specified module's alias list.
|
|
GlobalAlias(Type *Ty, LinkageTypes Linkage, const Twine &Name = "",
|
|
Constant* Aliasee = 0, Module *Parent = 0);
|
|
|
|
/// Provide fast operand accessors
|
|
DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Constant);
|
|
|
|
/// removeFromParent - This method unlinks 'this' from the containing module,
|
|
/// but does not delete it.
|
|
///
|
|
virtual void removeFromParent();
|
|
|
|
/// eraseFromParent - This method unlinks 'this' from the containing module
|
|
/// and deletes it.
|
|
///
|
|
virtual void eraseFromParent();
|
|
|
|
/// set/getAliasee - These methods retrive and set alias target.
|
|
void setAliasee(Constant *GV);
|
|
const Constant *getAliasee() const {
|
|
return getOperand(0);
|
|
}
|
|
Constant *getAliasee() {
|
|
return getOperand(0);
|
|
}
|
|
/// getAliasedGlobal() - Aliasee can be either global or bitcast of
|
|
/// global. This method retrives the global for both aliasee flavours.
|
|
const GlobalValue *getAliasedGlobal() const;
|
|
|
|
/// resolveAliasedGlobal() - This method tries to ultimately resolve the alias
|
|
/// by going through the aliasing chain and trying to find the very last
|
|
/// global. Returns NULL if a cycle was found. If stopOnWeak is false, then
|
|
/// the whole chain aliasing chain is traversed, otherwise - only strong
|
|
/// aliases.
|
|
const GlobalValue *resolveAliasedGlobal(bool stopOnWeak = true) const;
|
|
|
|
// Methods for support type inquiry through isa, cast, and dyn_cast:
|
|
static inline bool classof(const GlobalAlias *) { return true; }
|
|
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
|