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 StringRef; 21 class Twine; 22 class Value; 23 class GlobalValue; 24 template <typename T> class SmallVectorImpl; 25 class MCContext; 26 class MCSymbol; 27 class TargetData; 28 29 class Mangler { 30 public: 31 enum ManglerPrefixTy { 32 Default, ///< Emit default string before each symbol. 33 Private, ///< Emit "private" prefix before each symbol. 34 LinkerPrivate ///< Emit "linker private" prefix before each symbol. 35 }; 36 37 private: 38 MCContext &Context; 39 const TargetData &TD; 40 41 /// AnonGlobalIDs - We need to give global values the same name every time 42 /// they are mangled. This keeps track of the number we give to anonymous 43 /// ones. 44 /// 45 DenseMap<const GlobalValue*, unsigned> AnonGlobalIDs; 46 47 /// NextAnonGlobalID - This simple counter is used to unique value names. 48 /// 49 unsigned NextAnonGlobalID; 50 51 public: 52 Mangler(MCContext &context, const TargetData &td) 53 : Context(context), TD(td), NextAnonGlobalID(1) {} 54 55 /// getSymbol - Return the MCSymbol for the specified global value. This 56 /// symbol is the main label that is the address of the global. 57 MCSymbol *getSymbol(const GlobalValue *GV); 58 59 60 /// getNameWithPrefix - Fill OutName with the name of the appropriate prefix 61 /// and the specified global variable's name. If the global variable doesn't 62 /// have a name, this fills in a unique name for the global. 63 void getNameWithPrefix(SmallVectorImpl<char> &OutName, const GlobalValue *GV, 64 bool isImplicitlyPrivate); 65 66 /// getNameWithPrefix - Fill OutName with the name of the appropriate prefix 67 /// and the specified name as the global variable name. GVName must not be 68 /// empty. 69 void getNameWithPrefix(SmallVectorImpl<char> &OutName, const Twine &GVName, 70 ManglerPrefixTy PrefixTy = Mangler::Default); 71 }; 72 73 } // End llvm namespace 74 75 #endif // LLVM_SUPPORT_MANGLER_H 76
