lib/CodeGen/AsmPrinter/DwarfLabel.h

   1 //===--- lib/CodeGen/DwarfLabel.h - Dwarf Label -----------------*- 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 // DWARF Labels.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef CODEGEN_ASMPRINTER_DWARFLABEL_H__
  15 #define CODEGEN_ASMPRINTER_DWARFLABEL_H__
  16
  17 namespace llvm {
  18   class FoldingSetNodeID;
  19   class raw_ostream;
  20
  21   //===--------------------------------------------------------------------===//
  22   /// DWLabel - Labels are used to track locations in the assembler file.
  23   /// Labels appear in the form @verbatim <prefix><Tag><Number> @endverbatim,
  24   /// where the tag is a category of label (Ex. location) and number is a value
  25   /// unique in that category.
  26   class DWLabel {
  27     /// Tag - Label category tag. Should always be a statically declared C
  28     /// string.
  29     ///
  30     const char *Tag;
  31
  32     /// Number - Value to make label unique.
  33     ///
  34     unsigned Number;
  35   public:
  36     DWLabel(const char *T, unsigned N) : Tag(T), Number(N) {}
  37
  38     // Accessors.
  39     const char *getTag() const { return Tag; }
  40     unsigned getNumber() const { return Number; }
  41
  42     /// Profile - Used to gather unique data for the folding set.
  43     ///
  44     void Profile(FoldingSetNodeID &ID) const;
  45
  46 #ifndef NDEBUG
  47     void print(raw_ostream &O) const;
  48 #endif
  49   };
  50 } // end llvm namespace
  51
  52 #endif