76 lines
2.5 KiB
C
76 lines
2.5 KiB
C
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//===-------- llvm/GlobalIFunc.h - GlobalIFunc 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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/// \brief
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/// This file contains the declaration of the GlobalIFunc class, which
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/// represents a single indirect function in the IR. Indirect function uses
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/// ELF symbol type extension to mark that the address of a declaration should
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/// be resolved at runtime by calling a resolver function.
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_IR_GLOBALIFUNC_H
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#define LLVM_IR_GLOBALIFUNC_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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// Traits class for using GlobalIFunc in symbol table in Module.
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template <typename ValueSubClass> class SymbolTableListTraits;
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class GlobalIFunc final : public GlobalIndirectSymbol,
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public ilist_node<GlobalIFunc> {
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friend class SymbolTableListTraits<GlobalIFunc>;
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GlobalIFunc(Type *Ty, unsigned AddressSpace, LinkageTypes Linkage,
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const Twine &Name, Constant *Resolver, Module *Parent);
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public:
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GlobalIFunc(const GlobalIFunc &) = delete;
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GlobalIFunc &operator=(const GlobalIFunc &) = delete;
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/// If a parent module is specified, the ifunc is automatically inserted into
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/// the end of the specified module's ifunc list.
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static GlobalIFunc *create(Type *Ty, unsigned AddressSpace,
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LinkageTypes Linkage, const Twine &Name,
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Constant *Resolver, Module *Parent);
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/// This method unlinks 'this' from the containing module, but does not
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/// delete it.
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void removeFromParent();
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/// This method unlinks 'this' from the containing module and deletes it.
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void eraseFromParent();
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/// These methods retrieve and set ifunc resolver function.
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void setResolver(Constant *Resolver) {
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setIndirectSymbol(Resolver);
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}
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const Constant *getResolver() const {
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return getIndirectSymbol();
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}
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Constant *getResolver() {
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return getIndirectSymbol();
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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::GlobalIFuncVal;
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}
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};
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} // end namespace llvm
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#endif // LLVM_IR_GLOBALIFUNC_H
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