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_SUPPORT_MANGLER_H
15#define LLVM_SUPPORT_MANGLER_H
16
17#include "llvm/ADT/DenseMap.h"
18
19namespace llvm {
20class Twine;
21class GlobalValue;
22template <typename T> class SmallVectorImpl;
23class MCContext;
24class MCSymbol;
25class TargetData;
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  MCContext &Context;
37  const TargetData &TD;
38
39  /// AnonGlobalIDs - We need to give global values the same name every time
40  /// they are mangled.  This keeps track of the number we give to anonymous
41  /// ones.
42  ///
43  DenseMap<const GlobalValue*, unsigned> AnonGlobalIDs;
44
45  /// NextAnonGlobalID - This simple counter is used to unique value names.
46  ///
47  unsigned NextAnonGlobalID;
48
49public:
50  Mangler(MCContext &context, const TargetData &td)
51    : Context(context), TD(td), NextAnonGlobalID(1) {}
52
53  /// getSymbol - Return the MCSymbol for the specified global value.  This
54  /// symbol is the main label that is the address of the global.
55  MCSymbol *getSymbol(const GlobalValue *GV);
56
57
58  /// getNameWithPrefix - Fill OutName with the name of the appropriate prefix
59  /// and the specified global variable's name.  If the global variable doesn't
60  /// have a name, this fills in a unique name for the global.
61  void getNameWithPrefix(SmallVectorImpl<char> &OutName, const GlobalValue *GV,
62                         bool isImplicitlyPrivate);
63
64  /// getNameWithPrefix - Fill OutName with the name of the appropriate prefix
65  /// and the specified name as the global variable name.  GVName must not be
66  /// empty.
67  void getNameWithPrefix(SmallVectorImpl<char> &OutName, const Twine &GVName,
68                         ManglerPrefixTy PrefixTy = Mangler::Default);
69};
70
71} // End llvm namespace
72
73#endif // LLVM_SUPPORT_MANGLER_H
74