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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
71 lines
2.2 KiB
C++
71 lines
2.2 KiB
C++
//===- llvm/IR/Comdat.h - Comdat definitions --------------------*- 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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/// @file
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/// This file contains the declaration of the Comdat class, which represents a
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/// single COMDAT in LLVM.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_IR_COMDAT_H
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#define LLVM_IR_COMDAT_H
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#include "llvm-c/Types.h"
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#include "llvm/Support/CBindingWrapping.h"
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namespace llvm {
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class raw_ostream;
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class StringRef;
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template <typename ValueTy> class StringMapEntry;
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// This is a Name X SelectionKind pair. The reason for having this be an
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// independent object instead of just adding the name and the SelectionKind
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// to a GlobalObject is that it is invalid to have two Comdats with the same
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// name but different SelectionKind. This structure makes that unrepresentable.
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class Comdat {
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public:
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enum SelectionKind {
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Any, ///< The linker may choose any COMDAT.
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ExactMatch, ///< The data referenced by the COMDAT must be the same.
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Largest, ///< The linker will choose the largest COMDAT.
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NoDuplicates, ///< No other Module may specify this COMDAT.
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SameSize, ///< The data referenced by the COMDAT must be the same size.
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};
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Comdat(const Comdat &) = delete;
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Comdat(Comdat &&C);
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SelectionKind getSelectionKind() const { return SK; }
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void setSelectionKind(SelectionKind Val) { SK = Val; }
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StringRef getName() const;
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void print(raw_ostream &OS, bool IsForDebug = false) const;
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void dump() const;
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private:
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friend class Module;
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Comdat();
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// Points to the map in Module.
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StringMapEntry<Comdat> *Name = nullptr;
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SelectionKind SK = Any;
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};
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// Create wrappers for C Binding types (see CBindingWrapping.h).
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DEFINE_SIMPLE_CONVERSION_FUNCTIONS(Comdat, LLVMComdatRef)
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inline raw_ostream &operator<<(raw_ostream &OS, const Comdat &C) {
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C.print(OS);
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return OS;
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}
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} // end namespace llvm
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#endif // LLVM_IR_COMDAT_H
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