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c349d0b828
GlobalAlias and GlobalIFunc ought to be treated the same by the IR linker, so we can generalize the code to be in terms of their common base class GlobalIndirectSymbol. Differential Revision: https://reviews.llvm.org/D55046 llvm-svn: 368357
94 lines
3.2 KiB
C++
94 lines
3.2 KiB
C++
//===-------- 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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