Mangler.h revision 263508 
1//===-- llvm/Target/Mangler.h - Self-contained name mangler -----*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// Unified name mangler for various backends.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef LLVM_TARGET_MANGLER_H
15#define LLVM_TARGET_MANGLER_H
16
17#include "llvm/ADT/DenseMap.h"
18
19namespace llvm {
20
21class GlobalValue;
22class MCContext;
23template <typename T> class SmallVectorImpl;
24class TargetMachine;
25class Twine;
26
27class Mangler {
28public:
29  enum ManglerPrefixTy {
30    Default,               ///< Emit default string before each symbol.
31    Private,               ///< Emit "private" prefix before each symbol.
32    LinkerPrivate          ///< Emit "linker private" prefix before each symbol.
33  };
34
35private:
36  const TargetMachine *TM;
37
38  /// AnonGlobalIDs - We need to give global values the same name every time
39  /// they are mangled.  This keeps track of the number we give to anonymous
40  /// ones.
41  ///
42  DenseMap<const GlobalValue*, unsigned> AnonGlobalIDs;
43
44  /// NextAnonGlobalID - This simple counter is used to unique value names.
45  ///
46  unsigned NextAnonGlobalID;
47
48public:
49  Mangler(const TargetMachine *TM) : TM(TM), NextAnonGlobalID(1) {}
50
51  /// getNameWithPrefix - Fill OutName with the name of the appropriate prefix
52  /// and the specified global variable's name.  If the global variable doesn't
53  /// have a name, this fills in a unique name for the global.
54  void getNameWithPrefix(SmallVectorImpl<char> &OutName, const GlobalValue *GV,
55                         bool isImplicitlyPrivate, bool UseGlobalPrefix = true);
56
57  /// getNameWithPrefix - Fill OutName with the name of the appropriate prefix
58  /// and the specified name as the global variable name.  GVName must not be
59  /// empty.
60  void getNameWithPrefix(SmallVectorImpl<char> &OutName, const Twine &GVName,
61                         ManglerPrefixTy PrefixTy = Mangler::Default,
62                         bool UseGlobalPrefix = true);
63};
64
65} // End llvm namespace
66
67#endif // LLVM_TARGET_MANGLER_H
68