Revert my previous check-in that split up MachineModuleInfo. It turns out to

slow the compiler down at -O0 some 30% or more. Ooops.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53120 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 0 insertions, 707 deletions

diff --git a/include/llvm/CodeGen/MachineDebugInfoDesc.h b/include/llvm/CodeGen/MachineDebugInfoDesc.h
deleted file mode 100644
index 55f8767c88..0000000000
--- a/include/llvm/CodeGen/MachineDebugInfoDesc.h
+++ /dev/null
@@ -1,707 +0,0 @@
-//===-- llvm/CodeGen/MachineDebugInfoDesc.h ---------------------*- C++ -*-===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// Debug descriptor information for a module.
-// 
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_CODEGEN_MACHINEDEBUGINFODESC_H
-#define LLVM_CODEGEN_MACHINEDEBUGINFODESC_H
-
-#include "llvm/GlobalValue.h"
-#include "llvm/Support/DataTypes.h"
-#include <string>
-#include <vector>
-
-namespace llvm {
-
-//===----------------------------------------------------------------------===//
-// Forward declarations.
-class DIVisitor;
-class GlobalVariable;
-
-//===----------------------------------------------------------------------===//
-// Debug info description constants.
-
-enum {
-  LLVMDebugVersion     = (6 << 16),     // Current version of debug information.
-  LLVMDebugVersion5    = (5 << 16),     // Constant for version 5.
-  LLVMDebugVersion4    = (4 << 16),     // Constant for version 4.
-  LLVMDebugVersionMask = 0xffff0000     // Mask for version number.
-};
-
-//===----------------------------------------------------------------------===//
-/// DebugInfoDesc - This class is the base class for debug info descriptors.
-
-class DebugInfoDesc {
-  // Content indicator. Dwarf values are used but that does not limit use to
-  // Dwarf writers.
-  unsigned Tag;
-protected:
-  explicit DebugInfoDesc(unsigned T) : Tag(T | LLVMDebugVersion) {}
-public:
-  virtual ~DebugInfoDesc();
-
-  // Accessors
-  unsigned getTag()          const { return Tag & ~LLVMDebugVersionMask; }
-  unsigned getVersion()      const { return Tag &  LLVMDebugVersionMask; }
-  void setTag(unsigned T)          { Tag = T | LLVMDebugVersion; }
-  
-  /// TagFromGlobal - Returns the tag number from a debug info descriptor
-  /// GlobalVariable.  Return DIIValid if operand is not an unsigned int. 
-  static unsigned TagFromGlobal(GlobalVariable *GV);
-
-  /// VersionFromGlobal - Returns the version number from a debug info
-  /// descriptor GlobalVariable. Return DIIValid if operand is not an unsigned
-  /// int.
-  static unsigned VersionFromGlobal(GlobalVariable *GV);
-
-  /// DescFactory - Create an instance of debug info descriptor based on Tag.
-  /// Return NULL if not a recognized Tag.
-  static DebugInfoDesc *DescFactory(unsigned Tag);
-  
-  /// getLinkage - get linkage appropriate for this type of descriptor.
-  ///
-  virtual GlobalValue::LinkageTypes getLinkage() const;
-    
-  //===--------------------------------------------------------------------===//
-  // Subclasses should supply the following virtual methods.
-  
-  /// ApplyToFields - Target the vistor to the fields of the descriptor.
-  ///
-  virtual void ApplyToFields(DIVisitor *Visitor);
-
-  /// getDescString - Return a string used to compose global names and labels.
-  ///
-  virtual const char *getDescString() const = 0;
-  
-  /// getTypeString - Return a string used to label this descriptor's type.
-  ///
-  virtual const char *getTypeString() const = 0;
-  
-#ifndef NDEBUG
-  virtual void dump() = 0;
-#endif
-
-  //===--------------------------------------------------------------------===//
-  // Subclasses should supply the following static methods.
-  
-  // Implement isa/cast/dyncast.
-  static bool classof(const DebugInfoDesc *) { return true; }  
-};
-
-//===----------------------------------------------------------------------===//
-/// AnchorDesc - Descriptors of this class act as markers for identifying
-/// descriptors of certain groups.
-class AnchoredDesc;
-class AnchorDesc : public DebugInfoDesc {
-  // Tag number of descriptors anchored by this object.
-  unsigned AnchorTag;
-public:
-  AnchorDesc();
-  explicit AnchorDesc(AnchoredDesc *D);
-  
-  // Accessors
-  unsigned getAnchorTag() const { return AnchorTag; }
-
-  /// getLinkage - get linkage appropriate for this type of descriptor.
-  ///
-  virtual GlobalValue::LinkageTypes getLinkage() const;
-
-  /// ApplyToFields - Target the visitor to the fields of the AnchorDesc.
-  ///
-  virtual void ApplyToFields(DIVisitor *Visitor);
-
-  /// getDescString - Return a string used to compose global names and labels.
-  ///
-  virtual const char *getDescString() const;
-    
-  /// getTypeString - Return a string used to label this descriptor's type.
-  ///
-  virtual const char *getTypeString() const {
-    return "llvm.dbg.anchor.type";
-  }
-    
-#ifndef NDEBUG
-  virtual void dump();
-#endif
-
-  // Implement isa/cast/dyncast.
-  static bool classof(const AnchorDesc *) { return true; }
-  static bool classof(const DebugInfoDesc *D);
-};
-
-//===----------------------------------------------------------------------===//
-/// AnchoredDesc - This class manages anchors for a variety of top level
-/// descriptors.
-class AnchoredDesc : public DebugInfoDesc {
-  // Anchor for all descriptors of the same type.
-  DebugInfoDesc *Anchor;
-protected:
-  explicit AnchoredDesc(unsigned T);
-public:  
-  // Accessors.
-  AnchorDesc *getAnchor() const { return static_cast<AnchorDesc *>(Anchor); }
-  void setAnchor(AnchorDesc *A) { Anchor = static_cast<DebugInfoDesc *>(A); }
-
-  //===--------------------------------------------------------------------===//
-  // Subclasses should supply the following virtual methods.
-  
-  /// getAnchorString - Return a string used to label descriptor's anchor.
-  ///
-  virtual const char *getAnchorString() const = 0;
-    
-  /// ApplyToFields - Target the visitor to the fields of the AnchoredDesc.
-  ///
-  virtual void ApplyToFields(DIVisitor *Visitor);
-};
-
-//===----------------------------------------------------------------------===//
-/// CompileUnitDesc - This class packages debug information associated with a 
-/// source/header file.
-class CompileUnitDesc : public AnchoredDesc {
-  unsigned Language;                    // Language number (ex. DW_LANG_C89.)
-  std::string FileName;                 // Source file name.
-  std::string Directory;                // Source file directory.
-  std::string Producer;                 // Compiler string.
-public:
-  CompileUnitDesc();
-  
-  // Accessors
-  unsigned getLanguage()                  const { return Language; }
-  const std::string &getFileName()        const { return FileName; }
-  const std::string &getDirectory()       const { return Directory; }
-  const std::string &getProducer()        const { return Producer; }
-  void setLanguage(unsigned L)                  { Language = L; }
-  void setFileName(const std::string &FN)       { FileName = FN; }
-  void setDirectory(const std::string &D)       { Directory = D; }
-  void setProducer(const std::string &P)        { Producer = P; }
-  
-  // FIXME - Need translation unit getter/setter.
-
-  /// ApplyToFields - Target the visitor to the fields of the CompileUnitDesc.
-  ///
-  virtual void ApplyToFields(DIVisitor *Visitor);
-
-  /// getDescString - Return a string used to compose global names and labels.
-  ///
-  virtual const char *getDescString() const {
-    return "llvm.dbg.compile_unit";
-  }
-
-  /// getTypeString - Return a string used to label this descriptor's type.
-  ///
-  virtual const char *getTypeString() const {
-    return "llvm.dbg.compile_unit.type";
-  }
-
-  /// getAnchorString - Return a string used to label this descriptor's anchor.
-  ///
-  const char *getAnchorString() const {
-    return "llvm.dbg.compile_units";
-  }
-    
-#ifndef NDEBUG
-  virtual void dump();
-#endif
-
-  // Implement isa/cast/dyncast.
-  static bool classof(const CompileUnitDesc *) { return true; }
-  static bool classof(const DebugInfoDesc *D);
-};
-
-//===----------------------------------------------------------------------===//
-/// TypeDesc - This class packages debug information associated with a type.
-///
-class TypeDesc : public DebugInfoDesc {
-  enum {
-    FlagPrivate    = 1 << 0,
-    FlagProtected  = 1 << 1
-  };
-  DebugInfoDesc *Context;               // Context debug descriptor.
-  std::string Name;                     // Type name (may be empty.)
-  DebugInfoDesc *File;                  // Defined compile unit (may be NULL.)
-  unsigned Line;                        // Defined line# (may be zero.)
-  uint64_t Size;                        // Type bit size (may be zero.)
-  uint64_t Align;                       // Type bit alignment (may be zero.)
-  uint64_t Offset;                      // Type bit offset (may be zero.)
-  unsigned Flags;                       // Miscellaneous flags.
-public:
-  explicit TypeDesc(unsigned T);
-
-  // Accessors
-  DebugInfoDesc *getContext() const  { return Context; }
-  const std::string &getName() const { return Name; }
-  CompileUnitDesc *getFile() const {
-    return static_cast<CompileUnitDesc *>(File);
-  }
-  unsigned getLine() const   { return Line; }
-  uint64_t getSize() const   { return Size; }
-  uint64_t getAlign() const  { return Align; }
-  uint64_t getOffset() const { return Offset; }
-  bool isPrivate() const {
-    return (Flags & FlagPrivate) != 0;
-  }
-  bool isProtected() const {
-    return (Flags & FlagProtected) != 0;
-  }
-  void setContext(DebugInfoDesc *C)  { Context = C; }
-  void setName(const std::string &N) { Name = N; }
-  void setFile(CompileUnitDesc *U) {
-    File = static_cast<DebugInfoDesc *>(U);
-  }
-  void setLine(unsigned L)   { Line = L; }
-  void setSize(uint64_t S)   { Size = S; }
-  void setAlign(uint64_t A)  { Align = A; }
-  void setOffset(uint64_t O) { Offset = O; }
-  void setIsPrivate()        { Flags |= FlagPrivate; }
-  void setIsProtected()      { Flags |= FlagProtected; }
-  
-  /// ApplyToFields - Target the visitor to the fields of the TypeDesc.
-  ///
-  virtual void ApplyToFields(DIVisitor *Visitor);
-
-  /// getDescString - Return a string used to compose global names and labels.
-  ///
-  virtual const char *getDescString() const {
-    return "llvm.dbg.type";
-  }
-
-  /// getTypeString - Return a string used to label this descriptor's type.
-  ///
-  virtual const char *getTypeString() const {
-    return "llvm.dbg.type.type";
-  }
-  
-#ifndef NDEBUG
-  virtual void dump();
-#endif
-};
-
-//===----------------------------------------------------------------------===//
-/// BasicTypeDesc - This class packages debug information associated with a
-/// basic type (eg. int, bool, double.)
-class BasicTypeDesc : public TypeDesc {
-  unsigned Encoding;                    // Type encoding.
-public:
-  BasicTypeDesc();
-  
-  // Accessors
-  unsigned getEncoding() const { return Encoding; }
-  void setEncoding(unsigned E) { Encoding = E; }
-  
-  /// ApplyToFields - Target the visitor to the fields of the BasicTypeDesc.
-  ///
-  virtual void ApplyToFields(DIVisitor *Visitor);
-
-  /// getDescString - Return a string used to compose global names and labels.
-  ///
-  virtual const char *getDescString() const {
-    return "llvm.dbg.basictype";
-  }
-
-  /// getTypeString - Return a string used to label this descriptor's type.
-  ///
-  virtual const char *getTypeString() const {
-    return "llvm.dbg.basictype.type";
-  }
-
-#ifndef NDEBUG
-  virtual void dump();
-#endif
-
-  // Implement isa/cast/dyncast.
-  static bool classof(const BasicTypeDesc *) { return true; }
-  static bool classof(const DebugInfoDesc *D);
-};
-
-//===----------------------------------------------------------------------===//
-/// DerivedTypeDesc - This class packages debug information associated with a
-/// derived types (eg., typedef, pointer, reference.)
-class DerivedTypeDesc : public TypeDesc {
-  DebugInfoDesc *FromType;              // Type derived from.
-public:
-  explicit DerivedTypeDesc(unsigned T);
-  
-  // Accessors
-  TypeDesc *getFromType() const {
-    return static_cast<TypeDesc *>(FromType);
-  }
-  void setFromType(TypeDesc *F) {
-    FromType = static_cast<DebugInfoDesc *>(F);
-  }
-  
-  /// ApplyToFields - Target the visitor to the fields of the DerivedTypeDesc.
-  ///
-  virtual void ApplyToFields(DIVisitor *Visitor);
-
-  /// getDescString - Return a string used to compose global names and labels.
-  ///
-  virtual const char *getDescString() const {
-    return "llvm.dbg.derivedtype";
-  }
-
-  /// getTypeString - Return a string used to label this descriptor's type.
-  ///
-  virtual const char *getTypeString() const {
-    return "llvm.dbg.derivedtype.type";
-  }
-
-#ifndef NDEBUG
-  virtual void dump();
-#endif
-
-  // Implement isa/cast/dyncast.
-  static bool classof(const DerivedTypeDesc *) { return true; }
-  static bool classof(const DebugInfoDesc *D);
-};
-
-//===----------------------------------------------------------------------===//
-/// CompositeTypeDesc - This class packages debug information associated with a
-/// array/struct types (eg., arrays, struct, union, enums.)
-class CompositeTypeDesc : public DerivedTypeDesc {
-  std::vector<DebugInfoDesc *> Elements; // Information used to compose type.
-public:
-  explicit CompositeTypeDesc(unsigned T);
-  
-  // Accessors
-  std::vector<DebugInfoDesc *> &getElements() { return Elements; }
-  
-  /// ApplyToFields - Target the visitor to the fields of the CompositeTypeDesc.
-  ///
-  virtual void ApplyToFields(DIVisitor *Visitor);
-
-  /// getDescString - Return a string used to compose global names and labels.
-  ///
-  virtual const char *getDescString() const {
-    return "llvm.dbg.compositetype";
-  }
-
-  /// getTypeString - Return a string used to label this descriptor's type.
-  ///
-  virtual const char *getTypeString() const {
-    return "llvm.dbg.compositetype.type";
-  }
-
-#ifndef NDEBUG
-  virtual void dump();
-#endif
-
-  // Implement isa/cast/dyncast.
-  static bool classof(const CompositeTypeDesc *) { return true; }
-  static bool classof(const DebugInfoDesc *D);
-};
-
-//===----------------------------------------------------------------------===//
-/// SubrangeDesc - This class packages debug information associated with integer
-/// value ranges.
-class SubrangeDesc : public DebugInfoDesc {
-  int64_t Lo;                           // Low value of range.
-  int64_t Hi;                           // High value of range.
-public:
-  SubrangeDesc();
-  
-  // Accessors
-  int64_t getLo()                            const { return Lo; }
-  int64_t getHi()                            const { return Hi; }
-  void setLo(int64_t L)                            { Lo = L; }
-  void setHi(int64_t H)                            { Hi = H; }
-  
-  /// ApplyToFields - Target the visitor to the fields of the SubrangeDesc.
-  ///
-  virtual void ApplyToFields(DIVisitor *Visitor);
-
-  /// getDescString - Return a string used to compose global names and labels.
-  ///
-  virtual const char *getDescString() const {
-    return "llvm.dbg.subrange";
-  }
-  
-  /// getTypeString - Return a string used to label this descriptor's type.
-  ///
-  virtual const char *getTypeString() const {
-    return "llvm.dbg.subrange.type";
-  }
-
-#ifndef NDEBUG
-  virtual void dump();
-#endif
-
-  // Implement isa/cast/dyncast.
-  static bool classof(const SubrangeDesc *) { return true; }
-  static bool classof(const DebugInfoDesc *D);
-};
-
-//===----------------------------------------------------------------------===//
-/// EnumeratorDesc - This class packages debug information associated with
-/// named integer constants.
-class EnumeratorDesc : public DebugInfoDesc {
-  std::string Name;                     // Enumerator name.
-  int64_t Value;                        // Enumerator value.
-public:
-  EnumeratorDesc();
-  
-  // Accessors
-  const std::string &getName() const { return Name; }
-  int64_t getValue() const { return Value; }
-  void setName(const std::string &N) { Name = N; }
-  void setValue(int64_t V) { Value = V; }
-  
-  /// ApplyToFields - Target the visitor to the fields of the EnumeratorDesc.
-  ///
-  virtual void ApplyToFields(DIVisitor *Visitor);
-
-  /// getDescString - Return a string used to compose global names and labels.
-  ///
-  virtual const char *getDescString() const {
-    return "llvm.dbg.enumerator";
-  }
-  
-  /// getTypeString - Return a string used to label this descriptor's type.
-  ///
-  virtual const char *getTypeString() const {
-    return "llvm.dbg.enumerator.type";
-  }
-
-#ifndef NDEBUG
-  virtual void dump();
-#endif
-
-  // Implement isa/cast/dyncast.
-  static bool classof(const EnumeratorDesc *) { return true; }
-  static bool classof(const DebugInfoDesc *D);
-};
-
-//===----------------------------------------------------------------------===//
-/// VariableDesc - This class packages debug information associated with a
-/// subprogram variable.
-///
-class VariableDesc : public DebugInfoDesc {
-  DebugInfoDesc *Context;               // Context debug descriptor.
-  std::string Name;                     // Type name (may be empty.)
-  DebugInfoDesc *File;                  // Defined compile unit (may be NULL.)
-  unsigned Line;                        // Defined line# (may be zero.)
-  DebugInfoDesc *TyDesc;                // Type of variable.
-public:
-  explicit VariableDesc(unsigned T);
-
-  // Accessors
-  DebugInfoDesc *getContext() const  { return Context; }
-  const std::string &getName() const { return Name; }
-  CompileUnitDesc *getFile() const {
-    return static_cast<CompileUnitDesc *>(File);
-  }
-  unsigned getLine() const { return Line; }
-  TypeDesc *getType() const {
-    return static_cast<TypeDesc*>(TyDesc);
-  }
-  void setContext(DebugInfoDesc *C)  { Context = C; }
-  void setName(const std::string &N) { Name = N; }
-  void setFile(CompileUnitDesc *U) {
-    File = static_cast<DebugInfoDesc *>(U);
-  }
-  void setLine(unsigned L) { Line = L; }
-  void setType(TypeDesc *T) {
-    TyDesc = static_cast<DebugInfoDesc *>(T);
-  }
-  
-  /// ApplyToFields - Target the visitor to the fields of the VariableDesc.
-  ///
-  virtual void ApplyToFields(DIVisitor *Visitor);
-
-  /// getDescString - Return a string used to compose global names and labels.
-  ///
-  virtual const char *getDescString() const {
-    return "llvm.dbg.variable";
-  }
-
-  /// getTypeString - Return a string used to label this descriptor's type.
-  ///
-  virtual const char *getTypeString() const {
-    return "llvm.dbg.variable.type";
-  }
-
-#ifndef NDEBUG
-  virtual void dump();
-#endif
-  
-  // Implement isa/cast/dyncast.
-  static bool classof(const VariableDesc *) { return true; }
-  static bool classof(const DebugInfoDesc *D);
-};
-
-//===----------------------------------------------------------------------===//
-/// GlobalDesc - This class is the base descriptor for global functions and
-/// variables.
-class GlobalDesc : public AnchoredDesc {
-  DebugInfoDesc *Context;               // Context debug descriptor.
-  std::string Name;                     // Global name.
-  std::string FullName;                 // Fully qualified name.
-  std::string LinkageName;              // Name for binding to MIPS linkage.
-  DebugInfoDesc *File;                  // Defined compile unit (may be NULL.)
-  unsigned Line;                        // Defined line# (may be zero.)
-  DebugInfoDesc *TyDesc;                // Type debug descriptor.
-  bool IsStatic;                        // Is the global a static.
-  bool IsDefinition;                    // Is the global defined in context.
-protected:
-  explicit GlobalDesc(unsigned T);
-public:
-  // Accessors
-  DebugInfoDesc *getContext()                const { return Context; }
-  const std::string &getName()               const { return Name; }
-  const std::string &getFullName()           const { return FullName; }
-  const std::string &getLinkageName()        const { return LinkageName; }
-  CompileUnitDesc *getFile() const {
-    return static_cast<CompileUnitDesc *>(File);
-  }
-  unsigned getLine()                         const { return Line; }
-  TypeDesc *getType() const {
-    return static_cast<TypeDesc *>(TyDesc);
-  }
-  bool isStatic()                            const { return IsStatic; }
-  bool isDefinition()                        const { return IsDefinition; }
-  void setContext(DebugInfoDesc *C)                { Context = C; }
-  void setName(const std::string &N)               { Name = N; }
-  void setFullName(const std::string &N)           { FullName = N; }
-  void setLinkageName(const std::string &N)        { LinkageName = N; }
-  void setFile(CompileUnitDesc *U) {
-    File = static_cast<DebugInfoDesc *>(U);
-  }
-  void setLine(unsigned L)                         { Line = L; }
-  void setType(TypeDesc *T) {
-    TyDesc = static_cast<DebugInfoDesc *>(T);
-  }
-  void setIsStatic(bool IS)                        { IsStatic = IS; }
-  void setIsDefinition(bool ID)                    { IsDefinition = ID; }
-
-  /// ApplyToFields - Target the visitor to the fields of the GlobalDesc.
-  ///
-  virtual void ApplyToFields(DIVisitor *Visitor);
-};
-
-//===----------------------------------------------------------------------===//
-/// GlobalVariableDesc - This class packages debug information associated with a
-/// GlobalVariable.
-class GlobalVariableDesc : public GlobalDesc {
-  GlobalVariable *Global;               // llvm global.
-public:
-  GlobalVariableDesc();
-
-  // Accessors.
-  GlobalVariable *getGlobalVariable()        const { return Global; }
-  void setGlobalVariable(GlobalVariable *GV)       { Global = GV; }
-  
-  /// ApplyToFields - Target the visitor to the fields of the
-  /// GlobalVariableDesc.
-  virtual void ApplyToFields(DIVisitor *Visitor);
-
-  /// getDescString - Return a string used to compose global names and labels.
-  ///
-  virtual const char *getDescString() const {
-    return "llvm.dbg.global_variable";
-  }
-
-  /// getTypeString - Return a string used to label this descriptor's type.
-  ///
-  virtual const char *getTypeString() const {
-    return "llvm.dbg.global_variable.type";
-  }
-  
-  /// getAnchorString - Return a string used to label this descriptor's anchor.
-  ///
-  const char *getAnchorString() const {
-    return "llvm.dbg.global_variables";
-  }
-    
-#ifndef NDEBUG
-  virtual void dump();
-#endif
- 
-  // Implement isa/cast/dyncast.
-  static bool classof(const GlobalVariableDesc *) { return true; }
-  static bool classof(const DebugInfoDesc *D);
-};
-
-//===----------------------------------------------------------------------===//
-/// SubprogramDesc - This class packages debug information associated with a
-/// subprogram/function.
-struct SubprogramDesc : public GlobalDesc {
-  SubprogramDesc();
-  
-  /// ApplyToFields - Target the visitor to the fields of the SubprogramDesc.
-  ///
-  virtual void ApplyToFields(DIVisitor *Visitor);
-
-  /// getDescString - Return a string used to compose global names and labels.
-  ///
-  virtual const char *getDescString() const {
-    return "llvm.dbg.subprogram";
-  }
-
-  /// getTypeString - Return a string used to label this descriptor's type.
-  ///
-  virtual const char *getTypeString() const {
-    return "llvm.dbg.subprogram.type";
-  }
-  
-  /// getAnchorString - Return a string used to label this descriptor's anchor.
-  ///
-  const char *getAnchorString() const {
-    return "llvm.dbg.subprograms";
-  }
-    
-#ifndef NDEBUG
-  virtual void dump();
-#endif
-  
-  // Implement isa/cast/dyncast.
-  static bool classof(const SubprogramDesc *) { return true; }
-  static bool classof(const DebugInfoDesc *D);
-};
-
-//===----------------------------------------------------------------------===//
-/// BlockDesc - This descriptor groups variables and blocks nested in a block.
-///
-class BlockDesc : public DebugInfoDesc {
-  DebugInfoDesc *Context;               // Context debug descriptor.
-public:
-  BlockDesc();
-  
-  // Accessors
-  DebugInfoDesc *getContext()                const { return Context; }
-  void setContext(DebugInfoDesc *C)                { Context = C; }
-  
-  /// ApplyToFields - Target the visitor to the fields of the BlockDesc.
-  ///
-  virtual void ApplyToFields(DIVisitor *Visitor);
-
-  /// getDescString - Return a string used to compose global names and labels.
-  ///
-  virtual const char *getDescString() const {
-    return "llvm.dbg.block";
-  }
-
-  /// getTypeString - Return a string used to label this descriptor's type.
-  ///
-  virtual const char *getTypeString() const {
-    return "llvm.dbg.block.type";
-  }
- 
-#ifndef NDEBUG
-  virtual void dump();
-#endif
-  
-  // Implement isa/cast/dyncast.
-  static bool classof(const BlockDesc *) { return true; }
-  static bool classof(const DebugInfoDesc *D);
-};
-
-} // End llvm namespace
-
-#endif