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66 lines
1.9 KiB
C++
66 lines
1.9 KiB
C++
//===- llvm/IR/Comdat.h - Comdat definitions --------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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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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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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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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