1 //===-- llvm/IR/Mangler.h - Self-contained name mangler ---------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // Unified name mangler for various backends.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_IR_MANGLER_H
15 #define LLVM_IR_MANGLER_H
17 #include "llvm/ADT/DenseMap.h"
18 #include "llvm/Support/raw_ostream.h"
24 template <typename T> class SmallVectorImpl;
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.
38 /// We need to give global values the same name every time they are mangled.
39 /// This keeps track of the number we give to anonymous ones.
40 mutable DenseMap<const GlobalValue*, unsigned> AnonGlobalIDs;
42 /// This simple counter is used to unique value names.
43 mutable unsigned NextAnonGlobalID;
46 Mangler(const DataLayout *DL) : DL(DL), NextAnonGlobalID(1) {}
48 /// Print the appropriate prefix and the specified global variable's name.
49 /// If the global variable doesn't have a name, this fills in a unique name
52 static void getNameWithPrefix(SmallVectorImpl<char> &OutName,
53 const Twine &GVName, const DataLayout &DL);
55 void getNameWithPrefix(raw_ostream &OS, const GlobalValue *GV,
56 bool CannotUsePrivateLabel) const;
57 void getNameWithPrefix(SmallVectorImpl<char> &OutName, const GlobalValue *GV,
58 bool CannotUsePrivateLabel) const;
60 /// Print the appropriate prefix and the specified name as the global variable
61 /// name. GVName must not be empty.
62 void getNameWithPrefix(raw_ostream &OS, const Twine &GVName,
63 ManglerPrefixTy PrefixTy = Mangler::Default) const;
64 void getNameWithPrefix(SmallVectorImpl<char> &OutName, const Twine &GVName,
65 ManglerPrefixTy PrefixTy = Mangler::Default) const;
68 } // End llvm namespace