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//===-- llvm/IR/Comdat.h - Comdat definitions -------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
/// @file
/// This file contains the declaration of the Comdat class, which represents a
/// single COMDAT in LLVM.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_IR_COMDAT_H
#define LLVM_IR_COMDAT_H
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/Compiler.h"
namespace llvm {
class raw_ostream;
template <typename ValueTy> class StringMapEntry;
// This is a Name X SelectionKind pair. The reason for having this be an
// independent object instead of just adding the name and the SelectionKind
// to a GlobalObject is that it is invalid to have two Comdats with the same
// name but different SelectionKind. This structure makes that unrepresentable.
class Comdat {
public:
enum SelectionKind {
Any, ///< The linker may choose any COMDAT.
ExactMatch, ///< The data referenced by the COMDAT must be the same.
Largest, ///< The linker will choose the largest COMDAT.
NoDuplicates, ///< No other Module may specify this COMDAT.
SameSize, ///< The data referenced by the COMDAT must be the same size.
};
Comdat(Comdat &&C);
SelectionKind getSelectionKind() const { return SK; }
void setSelectionKind(SelectionKind Val) { SK = Val; }
StringRef getName() const;
void print(raw_ostream &OS) const;
void dump() const;
private:
friend class Module;
Comdat();
Comdat(SelectionKind SK, StringMapEntry<Comdat> *Name);
Comdat(const Comdat &) = delete;
// Points to the map in Module.
StringMapEntry<Comdat> *Name;
SelectionKind SK;
};
inline raw_ostream &operator<<(raw_ostream &OS, const Comdat &C) {
C.print(OS);
return OS;
}
} // end llvm namespace
#endif
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