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 20 namespace llvm { 21 22 class DataLayout; 23 class GlobalValue; 24 template <typename T> class SmallVectorImpl; 25 class Twine; 26 27 class 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 35 public: Mangler()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