Removoe MachineModuleInfo methods (and related DebugInfoDesc class hierarchy) that were used to handle debug info.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62199 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 0 insertions, 1711 deletions

diff --git a/lib/CodeGen/MachineModuleInfo.cpp b/lib/CodeGen/MachineModuleInfo.cpp
index 5fe59d4e5a..724c113b79 100644
--- a/lib/CodeGen/MachineModuleInfo.cpp
+++ b/lib/CodeGen/MachineModuleInfo.cpp
@@ -33,1598 +33,11 @@ X("machinemoduleinfo", "Module Information");
 char MachineModuleInfo::ID = 0;
 
 //===----------------------------------------------------------------------===//
-
-/// getGlobalVariablesUsing - Return all of the GlobalVariables which have the
-/// specified value in their initializer somewhere.
-static void
-getGlobalVariablesUsing(Value *V, std::vector<GlobalVariable*> &Result) {
-  // Scan though value users.
-  for (Value::use_iterator I = V->use_begin(), E = V->use_end(); I != E; ++I) {
-    if (GlobalVariable *GV = dyn_cast<GlobalVariable>(*I)) {
-      // If the user is a GlobalVariable then add to result.
-      Result.push_back(GV);
-    } else if (Constant *C = dyn_cast<Constant>(*I)) {
-      // If the user is a constant variable then scan its users
-      getGlobalVariablesUsing(C, Result);
-    }
-  }
-}
-
-/// getGlobalVariablesUsing - Return all of the GlobalVariables that use the
-/// named GlobalVariable.
-static void
-getGlobalVariablesUsing(Module &M, const std::string &RootName,
-                        std::vector<GlobalVariable*> &Result) {
-  std::vector<const Type*> FieldTypes;
-  FieldTypes.push_back(Type::Int32Ty);
-  FieldTypes.push_back(Type::Int32Ty);
-
-  // Get the GlobalVariable root.
-  GlobalVariable *UseRoot = M.getGlobalVariable(RootName,
-                                                StructType::get(FieldTypes));
-
-  // If present and linkonce then scan for users.
-  if (UseRoot && UseRoot->hasLinkOnceLinkage())
-    getGlobalVariablesUsing(UseRoot, Result);
-}
-  
-/// isStringValue - Return true if the given value can be coerced to a string.
-///
-static bool isStringValue(Value *V) {
-  if (GlobalVariable *GV = dyn_cast<GlobalVariable>(V)) {
-    if (GV->hasInitializer() && isa<ConstantArray>(GV->getInitializer())) {
-      ConstantArray *Init = cast<ConstantArray>(GV->getInitializer());
-      return Init->isString();
-    }
-  } else if (Constant *C = dyn_cast<Constant>(V)) {
-    if (GlobalValue *GV = dyn_cast<GlobalValue>(C))
-      return isStringValue(GV);
-    else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
-      if (CE->getOpcode() == Instruction::GetElementPtr) {
-        if (CE->getNumOperands() == 3 &&
-            cast<Constant>(CE->getOperand(1))->isNullValue() &&
-            isa<ConstantInt>(CE->getOperand(2))) {
-          return isStringValue(CE->getOperand(0));
-        }
-      }
-    }
-  }
-  return false;
-}
-
-/// getGlobalVariable - Return either a direct or cast Global value.
-///
-static GlobalVariable *getGlobalVariable(Value *V) {
-  if (GlobalVariable *GV = dyn_cast<GlobalVariable>(V)) {
-    return GV;
-  } else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(V)) {
-    if (CE->getOpcode() == Instruction::BitCast) {
-      return dyn_cast<GlobalVariable>(CE->getOperand(0));
-    } else if (CE->getOpcode() == Instruction::GetElementPtr) {
-      for (unsigned int i=1; i<CE->getNumOperands(); i++) {
-        if (!CE->getOperand(i)->isNullValue())
-          return NULL;
-      }
-      return dyn_cast<GlobalVariable>(CE->getOperand(0));
-    }
-  }
-  return NULL;
-}
-
-/// isGlobalVariable - Return true if the given value can be coerced to a
-/// GlobalVariable.
-static bool isGlobalVariable(Value *V) {
-  if (isa<GlobalVariable>(V) || isa<ConstantPointerNull>(V)) {
-    return true;
-  } else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(V)) {
-    if (CE->getOpcode() == Instruction::BitCast) {
-      return isa<GlobalVariable>(CE->getOperand(0));
-    } else if (CE->getOpcode() == Instruction::GetElementPtr) {
-      for (unsigned int i=1; i<CE->getNumOperands(); i++) {
-        if (!CE->getOperand(i)->isNullValue())
-          return false;
-      }
-      return isa<GlobalVariable>(CE->getOperand(0));
-    }
-  }
-  return false;
-}
-
-/// getUIntOperand - Return ith operand if it is an unsigned integer.
-///
-static ConstantInt *getUIntOperand(GlobalVariable *GV, unsigned i) {
-  // Make sure the GlobalVariable has an initializer.
-  if (!GV->hasInitializer()) return NULL;
-  
-  // Get the initializer constant.
-  ConstantStruct *CI = dyn_cast<ConstantStruct>(GV->getInitializer());
-  if (!CI) return NULL;
-  
-  // Check if there is at least i + 1 operands.
-  unsigned N = CI->getNumOperands();
-  if (i >= N) return NULL;
-
-  // Check constant.
-  return dyn_cast<ConstantInt>(CI->getOperand(i));
-}
-
-//===----------------------------------------------------------------------===//
-
-static unsigned CountFields(DebugInfoDesc *DD) {
-  unsigned Count = 0;
-
-  switch (DD->getTag()) {
-  case DW_TAG_anchor:           // AnchorDesc
-    // Tag
-    // AnchorTag
-    Count = 2;
-    break;
-  case DW_TAG_compile_unit:     // CompileUnitDesc
-    // [DW_TAG_anchor]
-    // if (Version == 0) DebugVersion
-    // Language
-    // FileName
-    // Directory
-    // Producer
-    Count = 6;
-  
-    // Handle cases out of sync with compiler.
-    if (DD->getVersion() == 0)
-      ++Count;
-
-    break;
-  case DW_TAG_variable:         // GlobalVariableDesc
-    // [DW_TAG_anchor]
-    // Context
-    // Name
-    // FullName
-    // LinkageName
-    // File
-    // Line
-    // TyDesc
-    // IsStatic
-    // IsDefinition
-    // Global
-    Count = 12;
-    break;
-  case DW_TAG_subprogram:       // SubprogramDesc
-    // [DW_TAG_anchor]
-    // Context
-    // Name
-    // FullName
-    // LinkageName
-    // File
-    // Line
-    // TyDesc
-    // IsStatic
-    // IsDefinition
-    Count = 11;
-    break;
-  case DW_TAG_lexical_block:    // BlockDesc
-    // Tag
-    // Context
-    Count = 2;
-    break;
-  case DW_TAG_base_type:        // BasicTypeDesc
-    // Tag
-    // Context
-    // Name
-    // File
-    // Line
-    // Size
-    // Align
-    // Offset
-    // if (Version > LLVMDebugVersion4) Flags
-    // Encoding
-    Count = 9;
-
-    if (DD->getVersion() > LLVMDebugVersion4)
-      ++Count;
-
-    break;
-  case DW_TAG_typedef:
-  case DW_TAG_pointer_type:        
-  case DW_TAG_reference_type:
-  case DW_TAG_const_type:
-  case DW_TAG_volatile_type:        
-  case DW_TAG_restrict_type:
-  case DW_TAG_member:
-  case DW_TAG_inheritance:      // DerivedTypeDesc
-    // Tag
-    // Context
-    // Name
-    // File
-    // Line
-    // Size
-    // Align
-    // Offset
-    // if (Version > LLVMDebugVersion4) Flags
-    // FromType
-    Count = 9;
-
-    if (DD->getVersion() > LLVMDebugVersion4)
-      ++Count;
-
-    break;
-  case DW_TAG_array_type:
-  case DW_TAG_structure_type:
-  case DW_TAG_union_type:
-  case DW_TAG_enumeration_type:
-  case DW_TAG_vector_type:
-  case DW_TAG_subroutine_type:  // CompositeTypeDesc
-    // Tag
-    // Context
-    // Name
-    // File
-    // Line
-    // Size
-    // Align
-    // Offset
-    // if (Version > LLVMDebugVersion4) Flags
-    // FromType
-    // Elements
-    Count = 10;
-
-    if (DD->getVersion() > LLVMDebugVersion4)
-      ++Count;
-
-    break;
-  case DW_TAG_subrange_type:    // SubrangeDesc
-    // Tag
-    // Lo
-    // Hi
-    Count = 3;
-    break;
-  case DW_TAG_enumerator:       // EnumeratorDesc
-    // Tag
-    // Name
-    // Value
-    Count = 3;
-    break;
-  case DW_TAG_return_variable:
-  case DW_TAG_arg_variable:
-  case DW_TAG_auto_variable:    // VariableDesc
-    // Tag
-    // Context
-    // Name
-    // File
-    // Line
-    // TyDesc
-    Count = 6;
-    break;
-  default:
-    break;
-  }
-
-  return Count;
-}
-
-//===----------------------------------------------------------------------===//
-
-/// ApplyToFields - Target the visitor to each field of the debug information
-/// descriptor.
-void DIVisitor::ApplyToFields(DebugInfoDesc *DD) {
-  DD->ApplyToFields(this);
-}
-
-namespace {
-
-//===----------------------------------------------------------------------===//
-/// DIDeserializeVisitor - This DIVisitor deserializes all the fields in the
-/// supplied DebugInfoDesc.
-class DIDeserializeVisitor : public DIVisitor {
-private:
-  DIDeserializer &DR;                   // Active deserializer.
-  unsigned I;                           // Current operand index.
-  ConstantStruct *CI;                   // GlobalVariable constant initializer.
-
-public:
-  DIDeserializeVisitor(DIDeserializer &D, GlobalVariable *GV)
-    : DIVisitor(), DR(D), I(0), CI(cast<ConstantStruct>(GV->getInitializer()))
-  {}
-  
-  /// Apply - Set the value of each of the fields.
-  ///
-  virtual void Apply(int &Field) {
-    Constant *C = CI->getOperand(I++);
-    Field = cast<ConstantInt>(C)->getSExtValue();
-  }
-  virtual void Apply(unsigned &Field) {
-    Constant *C = CI->getOperand(I++);
-    Field = cast<ConstantInt>(C)->getZExtValue();
-  }
-  virtual void Apply(int64_t &Field) {
-    Constant *C = CI->getOperand(I++);
-    Field = cast<ConstantInt>(C)->getSExtValue();
-  }
-  virtual void Apply(uint64_t &Field) {
-    Constant *C = CI->getOperand(I++);
-    Field = cast<ConstantInt>(C)->getZExtValue();
-  }
-  virtual void Apply(bool &Field) {
-    Constant *C = CI->getOperand(I++);
-    Field = cast<ConstantInt>(C)->getZExtValue();
-  }
-  virtual void Apply(std::string &Field) {
-    Constant *C = CI->getOperand(I++);
-    // Fills in the string if it succeeds
-    if (!GetConstantStringInfo(C, Field))
-      Field.clear();
-  }
-  virtual void Apply(DebugInfoDesc *&Field) {
-    Constant *C = CI->getOperand(I++);
-    Field = DR.Deserialize(C);
-  }
-  virtual void Apply(GlobalVariable *&Field) {
-    Constant *C = CI->getOperand(I++);
-    Field = getGlobalVariable(C);
-  }
-  virtual void Apply(std::vector<DebugInfoDesc *> &Field) {
-    Field.resize(0);
-    Constant *C = CI->getOperand(I++);
-    GlobalVariable *GV = getGlobalVariable(C);
-    if (GV && GV->hasInitializer()) {
-      if (ConstantArray *CA = dyn_cast<ConstantArray>(GV->getInitializer())) {
-        for (unsigned i = 0, N = CA->getNumOperands(); i < N; ++i) {
-          GlobalVariable *GVE = getGlobalVariable(CA->getOperand(i));
-          DebugInfoDesc *DE = DR.Deserialize(GVE);
-          Field.push_back(DE);
-        }
-      } else if (GV->getInitializer()->isNullValue()) {
-        if (const ArrayType *T =
-            dyn_cast<ArrayType>(GV->getType()->getElementType())) {
-          Field.resize(T->getNumElements());
-        }
-      }
-    }
-  }
-};
-
-//===----------------------------------------------------------------------===//
-/// DISerializeVisitor - This DIVisitor serializes all the fields in
-/// the supplied DebugInfoDesc.
-class DISerializeVisitor : public DIVisitor {
-private:
-  DISerializer &SR;                     // Active serializer.
-  std::vector<Constant*> &Elements;     // Element accumulator.
-  
-public:
-  DISerializeVisitor(DISerializer &S, std::vector<Constant*> &E)
-  : DIVisitor()
-  , SR(S)
-  , Elements(E)
-  {}
-  
-  /// Apply - Set the value of each of the fields.
-  ///
-  virtual void Apply(int &Field) {
-    Elements.push_back(ConstantInt::get(Type::Int32Ty, int32_t(Field)));
-  }
-  virtual void Apply(unsigned &Field) {
-    Elements.push_back(ConstantInt::get(Type::Int32Ty, uint32_t(Field)));
-  }
-  virtual void Apply(int64_t &Field) {
-    Elements.push_back(ConstantInt::get(Type::Int64Ty, int64_t(Field)));
-  }
-  virtual void Apply(uint64_t &Field) {
-    Elements.push_back(ConstantInt::get(Type::Int64Ty, uint64_t(Field)));
-  }
-  virtual void Apply(bool &Field) {
-    Elements.push_back(ConstantInt::get(Type::Int1Ty, Field));
-  }
-  virtual void Apply(std::string &Field) {
-    Elements.push_back(SR.getString(Field));
-  }
-  virtual void Apply(DebugInfoDesc *&Field) {
-    GlobalVariable *GV = NULL;
-    
-    // If non-NULL then convert to global.
-    if (Field) GV = SR.Serialize(Field);
-    
-    // FIXME - At some point should use specific type.
-    const PointerType *EmptyTy = SR.getEmptyStructPtrType();
-    
-    if (GV) {
-      // Set to pointer to global.
-      Elements.push_back(ConstantExpr::getBitCast(GV, EmptyTy));
-    } else {
-      // Use NULL.
-      Elements.push_back(ConstantPointerNull::get(EmptyTy));
-    }
-  }
-  virtual void Apply(GlobalVariable *&Field) {
-    const PointerType *EmptyTy = SR.getEmptyStructPtrType();
-    if (Field) {
-      Elements.push_back(ConstantExpr::getBitCast(Field, EmptyTy));
-    } else {
-      Elements.push_back(ConstantPointerNull::get(EmptyTy));
-    }
-  }
-  virtual void Apply(std::vector<DebugInfoDesc *> &Field) {
-    const PointerType *EmptyTy = SR.getEmptyStructPtrType();
-    unsigned N = Field.size();
-    ArrayType *AT = ArrayType::get(EmptyTy, N);
-    std::vector<Constant *> ArrayElements;
-
-    for (unsigned i = 0, N = Field.size(); i < N; ++i) {
-      if (DebugInfoDesc *Element = Field[i]) {
-        GlobalVariable *GVE = SR.Serialize(Element);
-        Constant *CE = ConstantExpr::getBitCast(GVE, EmptyTy);
-        ArrayElements.push_back(cast<Constant>(CE));
-      } else {
-        ArrayElements.push_back(ConstantPointerNull::get(EmptyTy));
-      }
-    }
-    
-    Constant *CA = ConstantArray::get(AT, ArrayElements);
-    GlobalVariable *CAGV = new GlobalVariable(AT, true,
-                                              GlobalValue::InternalLinkage,
-                                              CA, "llvm.dbg.array",
-                                              SR.getModule());
-    CAGV->setSection("llvm.metadata");
-    Constant *CAE = ConstantExpr::getBitCast(CAGV, EmptyTy);
-    Elements.push_back(CAE);
-  }
-};
-
-//===----------------------------------------------------------------------===//
-/// DIGetTypesVisitor - This DIVisitor gathers all the field types in
-/// the supplied DebugInfoDesc.
-class DIGetTypesVisitor : public DIVisitor {
-private:
-  DISerializer &SR;                     // Active serializer.
-  std::vector<const Type*> &Fields;     // Type accumulator.
-  
-public:
-  DIGetTypesVisitor(DISerializer &S, std::vector<const Type*> &F)
-  : DIVisitor()
-  , SR(S)
-  , Fields(F)
-  {}
-  
-  /// Apply - Set the value of each of the fields.
-  ///
-  virtual void Apply(int &Field) {
-    Fields.push_back(Type::Int32Ty);
-  }
-  virtual void Apply(unsigned &Field) {
-    Fields.push_back(Type::Int32Ty);
-  }
-  virtual void Apply(int64_t &Field) {
-    Fields.push_back(Type::Int64Ty);
-  }
-  virtual void Apply(uint64_t &Field) {
-    Fields.push_back(Type::Int64Ty);
-  }
-  virtual void Apply(bool &Field) {
-    Fields.push_back(Type::Int1Ty);
-  }
-  virtual void Apply(std::string &Field) {
-    Fields.push_back(SR.getStrPtrType());
-  }
-  virtual void Apply(DebugInfoDesc *&Field) {
-    // FIXME - At some point should use specific type.
-    const PointerType *EmptyTy = SR.getEmptyStructPtrType();
-    Fields.push_back(EmptyTy);
-  }
-  virtual void Apply(GlobalVariable *&Field) {
-    const PointerType *EmptyTy = SR.getEmptyStructPtrType();
-    Fields.push_back(EmptyTy);
-  }
-  virtual void Apply(std::vector<DebugInfoDesc *> &Field) {
-    const PointerType *EmptyTy = SR.getEmptyStructPtrType();
-    Fields.push_back(EmptyTy);
-  }
-};
-
-//===----------------------------------------------------------------------===//
-/// DIVerifyVisitor - This DIVisitor verifies all the field types against
-/// a constant initializer.
-class DIVerifyVisitor : public DIVisitor {
-private:
-  DIVerifier &VR;                       // Active verifier.
-  bool IsValid;                         // Validity status.
-  unsigned I;                           // Current operand index.
-  ConstantStruct *CI;                   // GlobalVariable constant initializer.
-  
-public:
-  DIVerifyVisitor(DIVerifier &V, GlobalVariable *GV)
-  : DIVisitor()
-  , VR(V)
-  , IsValid(true)
-  , I(0)
-  , CI(cast<ConstantStruct>(GV->getInitializer()))
-  {
-  }
-  
-  // Accessors.
-  bool isValid() const { return IsValid; }
-  
-  /// Apply - Set the value of each of the fields.
-  ///
-  virtual void Apply(int &Field) {
-    Constant *C = CI->getOperand(I++);
-    IsValid = IsValid && isa<ConstantInt>(C);
-  }
-  virtual void Apply(unsigned &Field) {
-    Constant *C = CI->getOperand(I++);
-    IsValid = IsValid && isa<ConstantInt>(C);
-  }
-  virtual void Apply(int64_t &Field) {
-    Constant *C = CI->getOperand(I++);
-    IsValid = IsValid && isa<ConstantInt>(C);
-  }
-  virtual void Apply(uint64_t &Field) {
-    Constant *C = CI->getOperand(I++);
-    IsValid = IsValid && isa<ConstantInt>(C);
-  }
-  virtual void Apply(bool &Field) {
-    Constant *C = CI->getOperand(I++);
-    IsValid = IsValid && isa<ConstantInt>(C) && C->getType() == Type::Int1Ty;
-  }
-  virtual void Apply(std::string &Field) {
-    Constant *C = CI->getOperand(I++);
-    IsValid = IsValid &&
-              (!C || isStringValue(C) || C->isNullValue());
-  }
-  virtual void Apply(DebugInfoDesc *&Field) {
-    // FIXME - Prepare the correct descriptor.
-    Constant *C = CI->getOperand(I++);
-    IsValid = IsValid && isGlobalVariable(C);
-  }
-  virtual void Apply(GlobalVariable *&Field) {
-    Constant *C = CI->getOperand(I++);
-    IsValid = IsValid && isGlobalVariable(C);
-  }
-  virtual void Apply(std::vector<DebugInfoDesc *> &Field) {
-    Constant *C = CI->getOperand(I++);
-    IsValid = IsValid && isGlobalVariable(C);
-    if (!IsValid) return;
-
-    GlobalVariable *GV = getGlobalVariable(C);
-    IsValid = IsValid && GV && GV->hasInitializer();
-    if (!IsValid) return;
-    
-    ConstantArray *CA = dyn_cast<ConstantArray>(GV->getInitializer());
-    IsValid = IsValid && CA;
-    if (!IsValid) return;
-
-    for (unsigned i = 0, N = CA->getNumOperands(); IsValid && i < N; ++i) {
-      IsValid = IsValid && isGlobalVariable(CA->getOperand(i));
-      if (!IsValid) return;
-    
-      GlobalVariable *GVE = getGlobalVariable(CA->getOperand(i));
-      VR.Verify(GVE);
-    }
-  }
-};
-
-}
-
-//===----------------------------------------------------------------------===//
-
-/// TagFromGlobal - Returns the tag number from a debug info descriptor
-/// GlobalVariable.   Return DIIValid if operand is not an unsigned int. 
-unsigned DebugInfoDesc::TagFromGlobal(GlobalVariable *GV) {
-  ConstantInt *C = getUIntOperand(GV, 0);
-  return C ? ((unsigned)C->getZExtValue() & ~LLVMDebugVersionMask) :
-             (unsigned)DW_TAG_invalid;
-}
-
-/// VersionFromGlobal - Returns the version number from a debug info
-/// descriptor GlobalVariable.  Return DIIValid if operand is not an unsigned
-/// int.
-unsigned  DebugInfoDesc::VersionFromGlobal(GlobalVariable *GV) {
-  ConstantInt *C = getUIntOperand(GV, 0);
-  return C ? ((unsigned)C->getZExtValue() & LLVMDebugVersionMask) :
-             (unsigned)DW_TAG_invalid;
-}
-
-/// DescFactory - Create an instance of debug info descriptor based on Tag.
-/// Return NULL if not a recognized Tag.
-DebugInfoDesc *DebugInfoDesc::DescFactory(unsigned Tag) {
-  switch (Tag) {
-  case DW_TAG_anchor:           return new AnchorDesc();
-  case DW_TAG_compile_unit:     return new CompileUnitDesc();
-  case DW_TAG_variable:         return new GlobalVariableDesc();
-  case DW_TAG_subprogram:       return new SubprogramDesc();
-  case DW_TAG_lexical_block:    return new BlockDesc();
-  case DW_TAG_base_type:        return new BasicTypeDesc();
-  case DW_TAG_typedef:
-  case DW_TAG_pointer_type:        
-  case DW_TAG_reference_type:
-  case DW_TAG_const_type:
-  case DW_TAG_volatile_type:        
-  case DW_TAG_restrict_type:
-  case DW_TAG_member:
-  case DW_TAG_inheritance:      return new DerivedTypeDesc(Tag);
-  case DW_TAG_array_type:
-  case DW_TAG_structure_type:
-  case DW_TAG_union_type:
-  case DW_TAG_enumeration_type:
-  case DW_TAG_vector_type:
-  case DW_TAG_subroutine_type:  return new CompositeTypeDesc(Tag);
-  case DW_TAG_subrange_type:    return new SubrangeDesc();
-  case DW_TAG_enumerator:       return new EnumeratorDesc();
-  case DW_TAG_return_variable:
-  case DW_TAG_arg_variable:
-  case DW_TAG_auto_variable:    return new VariableDesc(Tag);
-  default: break;
-  }
-  return NULL;
-}
-
-/// getLinkage - get linkage appropriate for this type of descriptor.
-///
-GlobalValue::LinkageTypes DebugInfoDesc::getLinkage() const {
-  return GlobalValue::InternalLinkage;
-}
-
-/// ApplyToFields - Target the vistor to the fields of the descriptor.
-///
-void DebugInfoDesc::ApplyToFields(DIVisitor *Visitor) {
-  Visitor->Apply(Tag);
-}
-
-//===----------------------------------------------------------------------===//
-
-AnchorDesc::AnchorDesc()
-: DebugInfoDesc(DW_TAG_anchor)
-, AnchorTag(0)
-{}
-AnchorDesc::AnchorDesc(AnchoredDesc *D)
-: DebugInfoDesc(DW_TAG_anchor)
-, AnchorTag(D->getTag())
-{}
-
-// Implement isa/cast/dyncast.
-bool AnchorDesc::classof(const DebugInfoDesc *D) {
-  return D->getTag() == DW_TAG_anchor;
-}
-  
-/// getLinkage - get linkage appropriate for this type of descriptor.
-///
-GlobalValue::LinkageTypes AnchorDesc::getLinkage() const {
-  return GlobalValue::LinkOnceLinkage;
-}
-
-/// ApplyToFields - Target the visitor to the fields of the TransUnitDesc.
-///
-void AnchorDesc::ApplyToFields(DIVisitor *Visitor) {
-  DebugInfoDesc::ApplyToFields(Visitor);
-  
-  Visitor->Apply(AnchorTag);
-}
-
-/// getDescString - Return a string used to compose global names and labels. A
-/// A global variable name needs to be defined for each debug descriptor that is
-/// anchored. NOTE: that each global variable named here also needs to be added
-/// to the list of names left external in the internalizer.
-///   ExternalNames.insert("llvm.dbg.compile_units");
-///   ExternalNames.insert("llvm.dbg.global_variables");
-///   ExternalNames.insert("llvm.dbg.subprograms");
-const char *AnchorDesc::getDescString() const {
-  switch (AnchorTag) {
-  case DW_TAG_compile_unit: return CompileUnitDesc::AnchorString;
-  case DW_TAG_variable:     return GlobalVariableDesc::AnchorString;
-  case DW_TAG_subprogram:   return SubprogramDesc::AnchorString;
-  default: break;
-  }
-
-  assert(0 && "Tag does not have a case for anchor string");
-  return "";
-}
-
-/// getTypeString - Return a string used to label this descriptors type.
-///
-const char *AnchorDesc::getTypeString() const {
-  return "llvm.dbg.anchor.type";
-}
-
-#ifndef NDEBUG
-void AnchorDesc::dump() {
-  cerr << getDescString() << " "
-       << "Version(" << getVersion() << "), "
-       << "Tag(" << getTag() << "), "
-       << "AnchorTag(" << AnchorTag << ")\n";
-}
-#endif
-
-//===----------------------------------------------------------------------===//
-
-AnchoredDesc::AnchoredDesc(unsigned T)
-: DebugInfoDesc(T)
-, Anchor(NULL)
-{}
-
-/// ApplyToFields - Target the visitor to the fields of the AnchoredDesc.
-///
-void AnchoredDesc::ApplyToFields(DIVisitor *Visitor) {
-  DebugInfoDesc::ApplyToFields(Visitor);
-
-  Visitor->Apply(Anchor);
-}
-
-//===----------------------------------------------------------------------===//
-
-CompileUnitDesc::CompileUnitDesc()
-: AnchoredDesc(DW_TAG_compile_unit)
-, Language(0)
-, FileName("")
-, Directory("")
-, Producer("")
-{}
-
-// Implement isa/cast/dyncast.
-bool CompileUnitDesc::classof(const DebugInfoDesc *D) {
-  return D->getTag() == DW_TAG_compile_unit;
-}
-
-/// ApplyToFields - Target the visitor to the fields of the CompileUnitDesc.
-///
-void CompileUnitDesc::ApplyToFields(DIVisitor *Visitor) {
-  AnchoredDesc::ApplyToFields(Visitor);
-  
-  // Handle cases out of sync with compiler.
-  if (getVersion() == 0) {
-    unsigned DebugVersion;
-    Visitor->Apply(DebugVersion);
-  }
-
-  Visitor->Apply(Language);
-  Visitor->Apply(FileName);
-  Visitor->Apply(Directory);
-  Visitor->Apply(Producer);
-}
-
-/// getDescString - Return a string used to compose global names and labels.
-///
-const char *CompileUnitDesc::getDescString() const {
-  return "llvm.dbg.compile_unit";
-}
-
-/// getTypeString - Return a string used to label this descriptors type.
-///
-const char *CompileUnitDesc::getTypeString() const {
-  return "llvm.dbg.compile_unit.type";
-}
-
-/// getAnchorString - Return a string used to label this descriptor's anchor.
-///
-const char *const CompileUnitDesc::AnchorString = "llvm.dbg.compile_units";
-const char *CompileUnitDesc::getAnchorString() const {
-  return AnchorString;
-}
-
-#ifndef NDEBUG
-void CompileUnitDesc::dump() {
-  cerr << getDescString() << " "
-       << "Version(" << getVersion() << "), "
-       << "Tag(" << getTag() << "), "
-       << "Anchor(" << getAnchor() << "), "
-       << "Language(" << Language << "), "
-       << "FileName(\"" << FileName << "\"), "
-       << "Directory(\"" << Directory << "\"), "
-       << "Producer(\"" << Producer << "\")\n";
-}
-#endif
-
-//===----------------------------------------------------------------------===//
-
-TypeDesc::TypeDesc(unsigned T)
-: DebugInfoDesc(T)
-, Context(NULL)
-, Name("")
-, File(NULL)
-, Line(0)
-, Size(0)
-, Align(0)
-, Offset(0)
-, Flags(0)
-{}
-
-/// ApplyToFields - Target the visitor to the fields of the TypeDesc.
-///
-void TypeDesc::ApplyToFields(DIVisitor *Visitor) {
-  DebugInfoDesc::ApplyToFields(Visitor);
-  
-  Visitor->Apply(Context);
-  Visitor->Apply(Name);
-  Visitor->Apply(File);
-  Visitor->Apply(Line);
-  Visitor->Apply(Size);
-  Visitor->Apply(Align);
-  Visitor->Apply(Offset);
-  if (getVersion() > LLVMDebugVersion4) Visitor->Apply(Flags);
-}
-
-/// getDescString - Return a string used to compose global names and labels.
-///
-const char *TypeDesc::getDescString() const {
-  return "llvm.dbg.type";
-}
-
-/// getTypeString - Return a string used to label this descriptor's type.
-///
-const char *TypeDesc::getTypeString() const {
-  return "llvm.dbg.type.type";
-}
-
-#ifndef NDEBUG
-void TypeDesc::dump() {
-  cerr << getDescString() << " "
-       << "Version(" << getVersion() << "), "
-       << "Tag(" << getTag() << "), "
-       << "Context(" << Context << "), "
-       << "Name(\"" << Name << "\"), "
-       << "File(" << File << "), "
-       << "Line(" << Line << "), "
-       << "Size(" << Size << "), "
-       << "Align(" << Align << "), "
-       << "Offset(" << Offset << "), "
-       << "Flags(" << Flags << ")\n";
-}
-#endif
-
-//===----------------------------------------------------------------------===//
-
-BasicTypeDesc::BasicTypeDesc()
-: TypeDesc(DW_TAG_base_type)
-, Encoding(0)
-{}
-
-// Implement isa/cast/dyncast.
-bool BasicTypeDesc::classof(const DebugInfoDesc *D) {
-  return D->getTag() == DW_TAG_base_type;
-}
-
-/// ApplyToFields - Target the visitor to the fields of the BasicTypeDesc.
-///
-void BasicTypeDesc::ApplyToFields(DIVisitor *Visitor) {
-  TypeDesc::ApplyToFields(Visitor);
-  
-  Visitor->Apply(Encoding);
-}
-
-/// getDescString - Return a string used to compose global names and labels.
-///
-const char *BasicTypeDesc::getDescString() const {
-  return "llvm.dbg.basictype";
-}
-
-/// getTypeString - Return a string used to label this descriptor's type.
-///
-const char *BasicTypeDesc::getTypeString() const {
-  return "llvm.dbg.basictype.type";
-}
-
-#ifndef NDEBUG
-void BasicTypeDesc::dump() {
-  cerr << getDescString() << " "
-       << "Version(" << getVersion() << "), "
-       << "Tag(" << getTag() << "), "
-       << "Context(" << getContext() << "), "
-       << "Name(\"" << getName() << "\"), "
-       << "Size(" << getSize() << "), "
-       << "Encoding(" << Encoding << "),"
-       << "Flags(" << Flags << ")\n";
-}
-#endif
-
-//===----------------------------------------------------------------------===//
-
-DerivedTypeDesc::DerivedTypeDesc(unsigned T)
-: TypeDesc(T)
-, FromType(NULL)
-{}
-
-// Implement isa/cast/dyncast.
-bool DerivedTypeDesc::classof(const DebugInfoDesc *D) {
-  unsigned T =  D->getTag();
-  switch (T) {
-  case DW_TAG_typedef:
-  case DW_TAG_pointer_type:
-  case DW_TAG_reference_type:
-  case DW_TAG_const_type:
-  case DW_TAG_volatile_type:
-  case DW_TAG_restrict_type:
-  case DW_TAG_member:
-  case DW_TAG_inheritance:
-    return true;
-  default: break;
-  }
-  return false;
-}
-
-/// ApplyToFields - Target the visitor to the fields of the DerivedTypeDesc.
-///
-void DerivedTypeDesc::ApplyToFields(DIVisitor *Visitor) {
-  TypeDesc::ApplyToFields(Visitor);
-  
-  Visitor->Apply(FromType);
-}
-
-/// getDescString - Return a string used to compose global names and labels.
-///
-const char *DerivedTypeDesc::getDescString() const {
-  return "llvm.dbg.derivedtype";
-}
-
-/// getTypeString - Return a string used to label this descriptor's type.
-///
-const char *DerivedTypeDesc::getTypeString() const {
-  return "llvm.dbg.derivedtype.type";
-}
-
-#ifndef NDEBUG
-void DerivedTypeDesc::dump() {
-  cerr << getDescString() << " "
-       << "Version(" << getVersion() << "), "
-       << "Tag(" << getTag() << "), "
-       << "Context(" << getContext() << "), "
-       << "Name(\"" << getName() << "\"), "
-       << "Size(" << getSize() << "), "
-       << "File(" << getFile() << "), "
-       << "Line(" << getLine() << "), "
-       << "FromType(" << FromType << "),"
-       << "Flags(" << Flags << ")\n";
-}
-#endif
-
-//===----------------------------------------------------------------------===//
-
-CompositeTypeDesc::CompositeTypeDesc(unsigned T)
-: DerivedTypeDesc(T)
-, Elements()
-{}
-  
-// Implement isa/cast/dyncast.
-bool CompositeTypeDesc::classof(const DebugInfoDesc *D) {
-  unsigned T =  D->getTag();
-  switch (T) {
-  case DW_TAG_array_type:
-  case DW_TAG_structure_type:
-  case DW_TAG_union_type:
-  case DW_TAG_enumeration_type:
-  case DW_TAG_vector_type:
-  case DW_TAG_subroutine_type:
-    return true;
-  default: break;
-  }
-  return false;
-}
-
-/// ApplyToFields - Target the visitor to the fields of the CompositeTypeDesc.
-///
-void CompositeTypeDesc::ApplyToFields(DIVisitor *Visitor) {
-  DerivedTypeDesc::ApplyToFields(Visitor);  
-
-  Visitor->Apply(Elements);
-}
-
-/// getDescString - Return a string used to compose global names and labels.
-///
-const char *CompositeTypeDesc::getDescString() const {
-  return "llvm.dbg.compositetype";
-}
-
-/// getTypeString - Return a string used to label this descriptor's type.
-///
-const char *CompositeTypeDesc::getTypeString() const {
-  return "llvm.dbg.compositetype.type";
-}
-
-#ifndef NDEBUG
-void CompositeTypeDesc::dump() {
-  cerr << getDescString() << " "
-       << "Version(" << getVersion() << "), "
-       << "Tag(" << getTag() << "), "
-       << "Context(" << getContext() << "), "
-       << "Name(\"" << getName() << "\"), "
-       << "Size(" << getSize() << "), "
-       << "File(" << getFile() << "), "
-       << "Line(" << getLine() << "), "
-       << "FromType(" << getFromType() << "), "
-       << "Elements.size(" << Elements.size() << "),"
-       << "Flags(" << Flags << ")\n";
-}
-#endif
-
-//===----------------------------------------------------------------------===//
-
-SubrangeDesc::SubrangeDesc()
-: DebugInfoDesc(DW_TAG_subrange_type)
-, Lo(0)
-, Hi(0)
-{}
-
-// Implement isa/cast/dyncast.
-bool SubrangeDesc::classof(const DebugInfoDesc *D) {
-  return D->getTag() == DW_TAG_subrange_type;
-}
-
-/// ApplyToFields - Target the visitor to the fields of the SubrangeDesc.
-///
-void SubrangeDesc::ApplyToFields(DIVisitor *Visitor) {
-  DebugInfoDesc::ApplyToFields(Visitor);
-
-  Visitor->Apply(Lo);
-  Visitor->Apply(Hi);
-}
-
-/// getDescString - Return a string used to compose global names and labels.
-///
-const char *SubrangeDesc::getDescString() const {
-  return "llvm.dbg.subrange";
-}
   
-/// getTypeString - Return a string used to label this descriptor's type.
-///
-const char *SubrangeDesc::getTypeString() const {
-  return "llvm.dbg.subrange.type";
-}
-
-#ifndef NDEBUG
-void SubrangeDesc::dump() {
-  cerr << getDescString() << " "
-       << "Version(" << getVersion() << "), "
-       << "Tag(" << getTag() << "), "
-       << "Lo(" << Lo << "), "
-       << "Hi(" << Hi << ")\n";
-}
-#endif
-
-//===----------------------------------------------------------------------===//
-
-EnumeratorDesc::EnumeratorDesc()
-: DebugInfoDesc(DW_TAG_enumerator)
-, Name("")
-, Value(0)
-{}
-
-// Implement isa/cast/dyncast.
-bool EnumeratorDesc::classof(const DebugInfoDesc *D) {
-  return D->getTag() == DW_TAG_enumerator;
-}
-
-/// ApplyToFields - Target the visitor to the fields of the EnumeratorDesc.
-///
-void EnumeratorDesc::ApplyToFields(DIVisitor *Visitor) {
-  DebugInfoDesc::ApplyToFields(Visitor);
-
-  Visitor->Apply(Name);
-  Visitor->Apply(Value);
-}
-