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_TARGET_MANGLER_H 15 #define LLVM_TARGET_MANGLER_H 16 17 #include "llvm/ADT/DenseMap.h" 18 #include "llvm/Support/raw_ostream.h" 19 20 namespace llvm { 21 22 class DataLayout; 23 class GlobalValue; 24 template <typename T> class SmallVectorImpl; 25 class Twine; 26 27 class Mangler { 28 public: 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 35 private: 36 const DataLayout *DL; 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 mutable DenseMap<const GlobalValue*, unsigned> AnonGlobalIDs; 43 44 /// NextAnonGlobalID - This simple counter is used to unique value names. 45 /// 46 mutable unsigned NextAnonGlobalID; 47 48 public: 49 Mangler(const DataLayout *DL) : DL(DL), NextAnonGlobalID(1) {} 50 51 /// Print the appropriate prefix and the specified global variable's name. 52 /// If the global variable doesn't have a name, this fills in a unique name 53 /// for the global. 54 void getNameWithPrefix(raw_ostream &OS, const GlobalValue *GV, 55 bool CannotUsePrivateLabel) const; 56 void getNameWithPrefix(SmallVectorImpl<char> &OutName, const GlobalValue *GV, 57 bool CannotUsePrivateLabel) const; 58 59 /// Print the appropriate prefix and the specified name as the global variable 60 /// name. GVName must not be empty. 61 void getNameWithPrefix(raw_ostream &OS, const Twine &GVName, 62 ManglerPrefixTy PrefixTy = Mangler::Default) const; 63 void getNameWithPrefix(SmallVectorImpl<char> &OutName, const Twine &GVName, 64 ManglerPrefixTy PrefixTy = Mangler::Default) const; 65 }; 66 67 } // End llvm namespace 68 69 #endif // LLVM_TARGET_MANGLER_H 70
