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 #include "llvm/Support/Compiler.h"
  18 #include <iosfwd>
  19 #include <vector>
  20
  21 namespace llvm {
  22   class FoldingSetNodeID;
  23
  24   //===--------------------------------------------------------------------===//
  25   /// DWLabel - Labels are used to track locations in the assembler file.
  26   /// Labels appear in the form @verbatim <prefix><Tag><Number> @endverbatim,
  27   /// where the tag is a category of label (Ex. location) and number is a value
  28   /// unique in that category.
  29   class VISIBILITY_HIDDEN DWLabel {
  30     /// Tag - Label category tag. Should always be a statically declared C
  31     /// string.
  32     ///
  33     const char *Tag;
  34
  35     /// Number - Value to make label unique.
  36     ///
  37     unsigned Number;
  38   public:
  39     DWLabel(const char *T, unsigned N) : Tag(T), Number(N) {}
  40
  41     // Accessors.
  42     const char *getTag() const { return Tag; }
  43     unsigned getNumber() const { return Number; }
  44
  45     /// Profile - Used to gather unique data for the folding set.
  46     ///
  47     void Profile(FoldingSetNodeID &ID) const;
  48
  49 #ifndef NDEBUG
  50     void print(std::ostream *O) const;
  51     void print(std::ostream &O) const;
  52 #endif
  53   };
  54 } // end llvm namespace
  55
  56 #endif