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 19 namespace llvm { 20 class Twine; 21 class GlobalValue; 22 template <typename T> class SmallVectorImpl; 23 class MCContext; 24 class MCSymbol; 25 class TargetData; 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 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 49 public: 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
