1//===-- llvm/IR/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_IR_MANGLER_H
15#define LLVM_IR_MANGLER_H
16
17#include "llvm/ADT/DenseMap.h"
18#include "llvm/Support/raw_ostream.h"
19
20namespace llvm {
21
22class DataLayout;
23class GlobalValue;
24template <typename T> class SmallVectorImpl;
25class Twine;
26
27class Mangler {
28  /// We need to give global values the same name every time they are mangled.
29  /// This keeps track of the number we give to anonymous ones.
30  mutable DenseMap<const GlobalValue*, unsigned> AnonGlobalIDs;
31
32  /// This simple counter is used to unique value names.
33  mutable unsigned NextAnonGlobalID;
34
35public:
36  Mangler() : NextAnonGlobalID(1) {}
37
38  /// Print the appropriate prefix and the specified global variable's name.
39  /// If the global variable doesn't have a name, this fills in a unique name
40  /// for the global.
41  void getNameWithPrefix(raw_ostream &OS, const GlobalValue *GV,
42                         bool CannotUsePrivateLabel) const;
43  void getNameWithPrefix(SmallVectorImpl<char> &OutName, const GlobalValue *GV,
44                         bool CannotUsePrivateLabel) const;
45
46  /// Print the appropriate prefix and the specified name as the global variable
47  /// name. GVName must not be empty.
48  static void getNameWithPrefix(raw_ostream &OS, const Twine &GVName,
49                                const DataLayout &DL);
50  static void getNameWithPrefix(SmallVectorImpl<char> &OutName,
51                                const Twine &GVName, const DataLayout &DL);
52};
53
54} // End llvm namespace
55
56#endif
57