mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-19 01:13:25 +00:00
051a950000
Specifically, introduction of XXX::Create methods for Users that have a potentially variable number of Uses. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49277 91177308-0d34-0410-b5e6-96231b3b80d8
101 lines
3.4 KiB
C++
101 lines
3.4 KiB
C++
//===-------- 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"
|
|
|
|
namespace llvm {
|
|
|
|
class Module;
|
|
class Constant;
|
|
class PointerType;
|
|
template<typename ValueSubClass, typename ItemParentClass>
|
|
class SymbolTableListTraits;
|
|
|
|
class GlobalAlias : public GlobalValue {
|
|
friend class SymbolTableListTraits<GlobalAlias, Module>;
|
|
void operator=(const GlobalAlias &); // Do not implement
|
|
GlobalAlias(const GlobalAlias &); // Do not implement
|
|
|
|
void setParent(Module *parent);
|
|
|
|
GlobalAlias *Prev, *Next;
|
|
void setNext(GlobalAlias *N) { Next = N; }
|
|
void setPrev(GlobalAlias *N) { Prev = N; }
|
|
|
|
// getNext/Prev - Return the next or previous alias in the list.
|
|
GlobalAlias *getNext() { return Next; }
|
|
const GlobalAlias *getNext() const { return Next; }
|
|
GlobalAlias *getPrev() { return Prev; }
|
|
const GlobalAlias *getPrev() const { return Prev; }
|
|
|
|
Use Aliasee;
|
|
public:
|
|
// allocate space for exactly zero operands
|
|
void *operator new(size_t s) {
|
|
return User::operator new(s, 0);
|
|
}
|
|
/// GlobalAlias ctor - If a parent module is specified, the alias is
|
|
/// automatically inserted into the end of the specified module's alias list.
|
|
GlobalAlias(const Type *Ty, LinkageTypes Linkage, const std::string &Name = "",
|
|
Constant* Aliasee = 0, Module *Parent = 0);
|
|
|
|
/// isDeclaration - Is this global variable lacking an initializer? If so,
|
|
/// the global variable is defined in some other translation unit, and is thus
|
|
/// only a declaration here.
|
|
virtual bool isDeclaration() const;
|
|
|
|
/// removeFromParent - This method unlinks 'this' from the containing module,
|
|
/// but does not delete it.
|
|
///
|
|
void removeFromParent();
|
|
|
|
/// eraseFromParent - This method unlinks 'this' from the containing module
|
|
/// and deletes it.
|
|
///
|
|
void eraseFromParent();
|
|
|
|
virtual void print(std::ostream &OS) const;
|
|
void print(std::ostream *OS) const { if (OS) print(*OS); }
|
|
|
|
/// set/getAliasee - These methods retrive and set alias target.
|
|
void setAliasee(Constant* GV);
|
|
const Constant* getAliasee() const {
|
|
return cast_or_null<Constant>(getOperand(0));
|
|
}
|
|
Constant* getAliasee() {
|
|
return cast_or_null<Constant>(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.
|
|
const GlobalValue* resolveAliasedGlobal() 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;
|
|
}
|
|
};
|
|
|
|
} // End llvm namespace
|
|
|
|
#endif
|