94 lines
3.2 KiB
C
94 lines
3.2 KiB
C
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//===-------- llvm/GlobalAlias.h - GlobalAlias class ------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains the declaration of the GlobalAlias class, which
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// represents a single function or variable alias in the IR.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_IR_GLOBALALIAS_H
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#define LLVM_IR_GLOBALALIAS_H
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#include "llvm/ADT/ilist_node.h"
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#include "llvm/IR/GlobalIndirectSymbol.h"
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#include "llvm/IR/Value.h"
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namespace llvm {
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class Twine;
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class Module;
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template <typename ValueSubClass> class SymbolTableListTraits;
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class GlobalAlias : public GlobalIndirectSymbol,
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public ilist_node<GlobalAlias> {
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friend class SymbolTableListTraits<GlobalAlias>;
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GlobalAlias(Type *Ty, unsigned AddressSpace, LinkageTypes Linkage,
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const Twine &Name, Constant *Aliasee, Module *Parent);
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public:
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GlobalAlias(const GlobalAlias &) = delete;
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GlobalAlias &operator=(const GlobalAlias &) = delete;
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/// If a parent module is specified, the alias is automatically inserted into
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/// the end of the specified module's alias list.
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static GlobalAlias *create(Type *Ty, unsigned AddressSpace,
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LinkageTypes Linkage, const Twine &Name,
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Constant *Aliasee, Module *Parent);
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// Without the Aliasee.
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static GlobalAlias *create(Type *Ty, unsigned AddressSpace,
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LinkageTypes Linkage, const Twine &Name,
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Module *Parent);
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// The module is taken from the Aliasee.
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static GlobalAlias *create(Type *Ty, unsigned AddressSpace,
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LinkageTypes Linkage, const Twine &Name,
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GlobalValue *Aliasee);
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// Type, Parent and AddressSpace taken from the Aliasee.
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static GlobalAlias *create(LinkageTypes Linkage, const Twine &Name,
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GlobalValue *Aliasee);
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// Linkage, Type, Parent and AddressSpace taken from the Aliasee.
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static GlobalAlias *create(const Twine &Name, GlobalValue *Aliasee);
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/// removeFromParent - This method unlinks 'this' from the containing module,
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/// but does not delete it.
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///
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void removeFromParent();
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/// eraseFromParent - This method unlinks 'this' from the containing module
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/// and deletes it.
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///
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void eraseFromParent();
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/// These methods retrieve and set alias target.
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void setAliasee(Constant *Aliasee);
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const Constant *getAliasee() const {
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return getIndirectSymbol();
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}
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Constant *getAliasee() {
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return getIndirectSymbol();
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}
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static bool isValidLinkage(LinkageTypes L) {
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return isExternalLinkage(L) || isLocalLinkage(L) ||
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isWeakLinkage(L) || isLinkOnceLinkage(L);
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}
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// Methods for support type inquiry through isa, cast, and dyn_cast:
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static bool classof(const Value *V) {
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return V->getValueID() == Value::GlobalAliasVal;
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}
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};
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} // end namespace llvm
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#endif // LLVM_IR_GLOBALALIAS_H
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