src/llvm/lib/CodeGen/AsmPrinter/DwarfStringPool.h

   1 //===-- llvm/CodeGen/DwarfStringPool.h - Dwarf Debug Framework -*- 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 #ifndef LLVM_LIB_CODEGEN_ASMPRINTER_DWARFSTRINGPOOL_H
  11 #define LLVM_LIB_CODEGEN_ASMPRINTER_DWARFSTRINGPOOL_H
  12
  13 #include "llvm/ADT/StringMap.h"
  14 #include "llvm/CodeGen/AsmPrinter.h"
  15 #include "llvm/Support/Allocator.h"
  16 #include <utility>
  17
  18 namespace llvm {
  19
  20 class MCSymbol;
  21 class MCSection;
  22 class StringRef;
  23
  24 // Collection of strings for this unit and assorted symbols.
  25 // A String->Symbol mapping of strings used by indirect
  26 // references.
  27 class DwarfStringPool {
  28   StringMap<std::pair<MCSymbol *, unsigned>, BumpPtrAllocator &> Pool;
  29   StringRef Prefix;
  30
  31 public:
  32   DwarfStringPool(BumpPtrAllocator &A, AsmPrinter &Asm, StringRef Prefix)
  33       : Pool(A), Prefix(Prefix) {}
  34
  35   void emit(AsmPrinter &Asm, const MCSection *StrSection,
  36             const MCSection *OffsetSection = nullptr);
  37
  38   /// \brief Returns an entry into the string pool with the given
  39   /// string text.
  40   MCSymbol *getSymbol(AsmPrinter &Asm, StringRef Str);
  41
  42   /// \brief Returns the index into the string pool with the given
  43   /// string text.
  44   unsigned getIndex(AsmPrinter &Asm, StringRef Str);
  45
  46   bool empty() const { return Pool.empty(); }
  47 };
  48 }
  49 #endif