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//===-- llvm/IR/Mangler.h - Self-contained name mangler ---------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Unified name mangler for various backends.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_IR_MANGLER_H
#define LLVM_IR_MANGLER_H

#include "llvm/ADT/DenseMap.h"
#include "llvm/IR/GlobalValue.h"

namespace llvm {

class DataLayout;
template <typename T> class SmallVectorImpl;
class Triple;
class Twine;
class raw_ostream;

class Mangler {
  /// We need to give global values the same name every time they are mangled.
  /// This keeps track of the number we give to anonymous ones.
  mutable DenseMap<const GlobalValue*, unsigned> AnonGlobalIDs;

public:
  /// Print the appropriate prefix and the specified global variable's name.
  /// If the global variable doesn't have a name, this fills in a unique name
  /// for the global.
  void getNameWithPrefix(raw_ostream &OS, const GlobalValue *GV,
                         bool CannotUsePrivateLabel) const;
  void getNameWithPrefix(SmallVectorImpl<char> &OutName, const GlobalValue *GV,
                         bool CannotUsePrivateLabel) const;

  /// Print the appropriate prefix and the specified name as the global variable
  /// name. GVName must not be empty.
  static void getNameWithPrefix(raw_ostream &OS, const Twine &GVName,
                                const DataLayout &DL);
  static void getNameWithPrefix(SmallVectorImpl<char> &OutName,
                                const Twine &GVName, const DataLayout &DL);
};

void emitLinkerFlagsForGlobalCOFF(raw_ostream &OS, const GlobalValue *GV,
                                  const Triple &TT, Mangler &Mangler);

} // End llvm namespace

#endif