include/llvm/IR/Mangler.h

   1 //===-- llvm/IR/Mangler.h - Self-contained name mangler ---------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // Unified name mangler for various backends.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #ifndef LLVM_IR_MANGLER_H
  14 #define LLVM_IR_MANGLER_H
  15
  16 #include "llvm/ADT/DenseMap.h"
  17 #include "llvm/IR/GlobalValue.h"
  18
  19 namespace llvm {
  20
  21 class DataLayout;
  22 template <typename T> class SmallVectorImpl;
  23 class Triple;
  24 class Twine;
  25 class raw_ostream;
  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 public:
  33   /// Print the appropriate prefix and the specified global variable's name.
  34   /// If the global variable doesn't have a name, this fills in a unique name
  35   /// for the global.
  36   void getNameWithPrefix(raw_ostream &OS, const GlobalValue *GV,
  37                          bool CannotUsePrivateLabel) const;
  38   void getNameWithPrefix(SmallVectorImpl<char> &OutName, const GlobalValue *GV,
  39                          bool CannotUsePrivateLabel) const;
  40
  41   /// Print the appropriate prefix and the specified name as the global variable
  42   /// name. GVName must not be empty.
  43   static void getNameWithPrefix(raw_ostream &OS, const Twine &GVName,
  44                                 const DataLayout &DL);
  45   static void getNameWithPrefix(SmallVectorImpl<char> &OutName,
  46                                 const Twine &GVName, const DataLayout &DL);
  47 };
  48
  49 void emitLinkerFlagsForGlobalCOFF(raw_ostream &OS, const GlobalValue *GV,
  50                                   const Triple &TT, Mangler &Mangler);
  51
  52 void emitLinkerFlagsForUsedCOFF(raw_ostream &OS, const GlobalValue *GV,
  53                                 const Triple &T, Mangler &M);
  54
  55 } // End llvm namespace
  56
  57 #endif