X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FIR%2FDebugInfo.h;h=4caceacbb58e07c05f3d88a21b7092a3f99848e0;hb=868145efb053c3f9294676cf4f36d6220e500269;hp=462695b6c501503a62f98c41c279cb0b916f3be7;hpb=b0b5cb29ab785eebab423ef93d5dd133c78dbe7a;p=oota-llvm.git

diff --git a/include/llvm/IR/DebugInfo.h b/include/llvm/IR/DebugInfo.h
index 462695b6c50..4caceacbb58 100644
--- a/include/llvm/IR/DebugInfo.h
+++ b/include/llvm/IR/DebugInfo.h
@@ -29,727 +29,20 @@
 #include <iterator>
 
 namespace llvm {
-class BasicBlock;
-class Constant;
-class Function;
-class GlobalVariable;
 class Module;
-class Type;
-class Value;
 class DbgDeclareInst;
 class DbgValueInst;
-class Instruction;
-class Metadata;
-class MDNode;
-class MDString;
-class NamedMDNode;
-class LLVMContext;
-class raw_ostream;
-
-class DIFile;
-class DISubprogram;
-class DILexicalBlock;
-class DILexicalBlockFile;
-class DIVariable;
-class DIType;
-class DIScope;
-class DIObjCProperty;
 
 /// \brief Maps from type identifier to the actual MDNode.
-typedef DenseMap<const MDString *, MDNode *> DITypeIdentifierMap;
-
-/// \brief A thin wraper around MDNode to access encoded debug info.
-///
-/// This should not be stored in a container, because the underlying MDNode may
-/// change in certain situations.
-class DIDescriptor {
-public:
-  /// \brief Duplicated debug info flags.
-  ///
-  /// \see DebugNode::DIFlags.
-  enum {
-#define HANDLE_DI_FLAG(ID, NAME) Flag##NAME = DebugNode::Flag##NAME,
-#include "llvm/IR/DebugInfoFlags.def"
-    FlagAccessibility = DebugNode::FlagAccessibility
-  };
-
-protected:
-  const MDNode *DbgNode;
-
-public:
-  explicit DIDescriptor(const MDNode *N = nullptr) : DbgNode(N) {}
-  DIDescriptor(const DebugNode *N) : DbgNode(N) {}
-
-  MDNode *get() const { return const_cast<MDNode *>(DbgNode); }
-  operator MDNode *() const { return get(); }
-  MDNode *operator->() const { return get(); }
-  MDNode &operator*() const { return *get(); }
-
-  // An explicit operator bool so that we can do testing of DI values
-  // easily.
-  // FIXME: This operator bool isn't actually protecting anything at the
-  // moment due to the conversion operator above making DIDescriptor nodes
-  // implicitly convertable to bool.
-  explicit operator bool() const { return DbgNode != nullptr; }
-
-  bool operator==(DIDescriptor Other) const { return DbgNode == Other.DbgNode; }
-  bool operator!=(DIDescriptor Other) const { return !operator==(Other); }
-
-  uint16_t getTag() const {
-    if (auto *N = dyn_cast_or_null<DebugNode>(get()))
-      return N->getTag();
-    return 0;
-  }
-
-  void print(raw_ostream &OS) const;
-  void dump() const;
-};
-
-#define DECLARE_SIMPLIFY_DESCRIPTOR(DESC)                                      \
-  class DESC;                                                                  \
-  template <> struct simplify_type<const DESC>;                                \
-  template <> struct simplify_type<DESC>;
-DECLARE_SIMPLIFY_DESCRIPTOR(DIDescriptor)
-DECLARE_SIMPLIFY_DESCRIPTOR(DISubrange)
-DECLARE_SIMPLIFY_DESCRIPTOR(DIEnumerator)
-DECLARE_SIMPLIFY_DESCRIPTOR(DIScope)
-DECLARE_SIMPLIFY_DESCRIPTOR(DIType)
-DECLARE_SIMPLIFY_DESCRIPTOR(DIBasicType)
-DECLARE_SIMPLIFY_DESCRIPTOR(DIDerivedType)
-DECLARE_SIMPLIFY_DESCRIPTOR(DICompositeType)
-DECLARE_SIMPLIFY_DESCRIPTOR(DISubroutineType)
-DECLARE_SIMPLIFY_DESCRIPTOR(DIFile)
-DECLARE_SIMPLIFY_DESCRIPTOR(DICompileUnit)
-DECLARE_SIMPLIFY_DESCRIPTOR(DISubprogram)
-DECLARE_SIMPLIFY_DESCRIPTOR(DILexicalBlock)
-DECLARE_SIMPLIFY_DESCRIPTOR(DILexicalBlockFile)
-DECLARE_SIMPLIFY_DESCRIPTOR(DINameSpace)
-DECLARE_SIMPLIFY_DESCRIPTOR(DITemplateTypeParameter)
-DECLARE_SIMPLIFY_DESCRIPTOR(DITemplateValueParameter)
-DECLARE_SIMPLIFY_DESCRIPTOR(DIGlobalVariable)
-DECLARE_SIMPLIFY_DESCRIPTOR(DIVariable)
-DECLARE_SIMPLIFY_DESCRIPTOR(DIExpression)
-DECLARE_SIMPLIFY_DESCRIPTOR(DILocation)
-DECLARE_SIMPLIFY_DESCRIPTOR(DIObjCProperty)
-DECLARE_SIMPLIFY_DESCRIPTOR(DIImportedEntity)
-#undef DECLARE_SIMPLIFY_DESCRIPTOR
-
-typedef DebugNodeArray DIArray;
-typedef MDTypeRefArray DITypeArray;
-
-/// \brief This is used to represent ranges, for array bounds.
-class DISubrange : public DIDescriptor {
-public:
-  DISubrange() = default;
-  DISubrange(const MDSubrange *N) : DIDescriptor(N) {}
-
-  MDSubrange *get() const {
-    return cast_or_null<MDSubrange>(DIDescriptor::get());
-  }
-  operator MDSubrange *() const { return get(); }
-  MDSubrange *operator->() const { return get(); }
-  MDSubrange &operator*() const { return *get(); }
-
-  int64_t getLo() const { return get()->getLowerBound(); }
-  int64_t getCount() const { return get()->getCount(); }
-};
-
-/// \brief A wrapper for an enumerator (e.g. X and Y in 'enum {X,Y}').
-///
-/// FIXME: it seems strange that this doesn't have either a reference to the
-/// type/precision or a file/line pair for location info.
-class DIEnumerator : public DIDescriptor {
-public:
-  DIEnumerator() = default;
-  DIEnumerator(const MDEnumerator *N) : DIDescriptor(N) {}
-
-  MDEnumerator *get() const {
-    return cast_or_null<MDEnumerator>(DIDescriptor::get());
-  }
-  operator MDEnumerator *() const { return get(); }
-  MDEnumerator *operator->() const { return get(); }
-  MDEnumerator &operator*() const { return *get(); }
-
-  StringRef getName() const { return get()->getName(); }
-  int64_t getEnumValue() const { return get()->getValue(); }
-};
-
-template <typename T> class DIRef;
-typedef DIRef<DIDescriptor> DIDescriptorRef;
-typedef DIRef<DIScope> DIScopeRef;
-typedef DIRef<DIType> DITypeRef;
-
-/// \brief A base class for various scopes.
-///
-/// Although, implementation-wise, DIScope is the parent class of most
-/// other DIxxx classes, including DIType and its descendants, most of
-/// DIScope's descendants are not a substitutable subtype of
-/// DIScope. The DIDescriptor::isScope() method only is true for
-/// DIScopes that are scopes in the strict lexical scope sense
-/// (DICompileUnit, DISubprogram, etc.), but not for, e.g., a DIType.
-class DIScope : public DIDescriptor {
-public:
-  DIScope() = default;
-  DIScope(const MDScope *N) : DIDescriptor(N) {}
-
-  MDScope *get() const { return cast_or_null<MDScope>(DIDescriptor::get()); }
-  operator MDScope *() const { return get(); }
-  MDScope *operator->() const { return get(); }
-  MDScope &operator*() const { return *get(); }
-
-  inline DIScopeRef getContext() const;
-  StringRef getName() const { return get()->getName(); }
-  StringRef getFilename() const { return get()->getFilename(); }
-  StringRef getDirectory() const { return get()->getDirectory(); }
-
-  /// \brief Generate a reference to this DIScope.
-  ///
-  /// Uses the type identifier instead of the actual MDNode if possible, to
-  /// help type uniquing.
-  DIScopeRef getRef() const;
-};
-
-/// \brief Represents reference to a DIDescriptor.
-///
-/// Abstracts over direct and identifier-based metadata references.
-template <typename T> class DIRef {
-  /// \brief Val can be either a MDNode or a MDString.
-  ///
-  /// In the latter, MDString specifies the type identifier.
-  const Metadata *Val;
-
-public:
-  template <class U>
-  DIRef(const TypedDebugNodeRef<U> &Ref,
-        typename std::enable_if<std::is_convertible<U *, T>::value>::type * =
-            nullptr)
-      : Val(Ref) {}
-
-  T resolve(const DITypeIdentifierMap &Map) const;
-  operator Metadata *() const { return const_cast<Metadata *>(Val); }
-};
-
-template <>
-DIDescriptor DIRef<DIDescriptor>::resolve(const DITypeIdentifierMap &Map) const;
-template <>
-DIScope DIRef<DIScope>::resolve(const DITypeIdentifierMap &Map) const;
-template <> DIType DIRef<DIType>::resolve(const DITypeIdentifierMap &Map) const;
-
-DIScopeRef DIScope::getContext() const { return get()->getScope(); }
-
-/// \brief This is a wrapper for a type.
-///
-/// FIXME: Types should be factored much better so that CV qualifiers and
-/// others do not require a huge and empty descriptor full of zeros.
-class DIType : public DIScope {
-public:
-  DIType() = default;
-  DIType(const MDType *N) : DIScope(N) {}
-
-  MDType *get() const { return cast_or_null<MDType>(DIDescriptor::get()); }
-  operator MDType *() const { return get(); }
-  MDType *operator->() const { return get(); }
-  MDType &operator*() const { return *get(); }
-
-  DIScopeRef getContext() const { return get()->getScope(); }
-  StringRef getName() const { return get()->getName(); }
-  unsigned getLineNumber() const { return get()->getLine(); }
-  uint64_t getSizeInBits() const { return get()->getSizeInBits(); }
-  uint64_t getAlignInBits() const { return get()->getAlignInBits(); }
-  // FIXME: Offset is only used for DW_TAG_member nodes.  Making every type
-  // carry this is just plain insane.
-  uint64_t getOffsetInBits() const { return get()->getOffsetInBits(); }
-  unsigned getFlags() const { return get()->getFlags(); }
-
-  bool isPrivate() const { return get()->isPrivate(); }
-  bool isProtected() const { return get()->isProtected(); }
-  bool isPublic() const { return get()->isPublic(); }
-  bool isForwardDecl() const { return get()->isForwardDecl(); }
-  bool isAppleBlockExtension() const { return get()->isAppleBlockExtension(); }
-  bool isBlockByrefStruct() const { return get()->isBlockByrefStruct(); }
-  bool isVirtual() const { return get()->isVirtual(); }
-  bool isArtificial() const { return get()->isArtificial(); }
-  bool isObjectPointer() const { return get()->isObjectPointer(); }
-  bool isObjcClassComplete() const { return get()->isObjcClassComplete(); }
-  bool isVector() const { return get()->isVector(); }
-  bool isStaticMember() const { return get()->isStaticMember(); }
-  bool isLValueReference() const { return get()->isLValueReference(); }
-  bool isRValueReference() const { return get()->isRValueReference(); }
-
-  bool isValid() const { return DbgNode && isa<MDType>(*this); }
-};
-
-/// \brief A basic type, like 'int' or 'float'.
-class DIBasicType : public DIType {
-public:
-  DIBasicType() = default;
-  DIBasicType(const MDBasicType *N) : DIType(N) {}
-
-  MDBasicType *get() const {
-    return cast_or_null<MDBasicType>(DIDescriptor::get());
-  }
-  operator MDBasicType *() const { return get(); }
-  MDBasicType *operator->() const { return get(); }
-  MDBasicType &operator*() const { return *get(); }
-
-  unsigned getEncoding() const { return get()->getEncoding(); }
-};
-
-/// \brief A simple derived type
-///
-/// Like a const qualified type, a typedef, a pointer or reference, et cetera.
-/// Or, a data member of a class/struct/union.
-class DIDerivedType : public DIType {
-public:
-  DIDerivedType() = default;
-  DIDerivedType(const MDDerivedTypeBase *N) : DIType(N) {}
-
-  MDDerivedTypeBase *get() const {
-    return cast_or_null<MDDerivedTypeBase>(DIDescriptor::get());
-  }
-  operator MDDerivedTypeBase *() const { return get(); }
-  MDDerivedTypeBase *operator->() const { return get(); }
-  MDDerivedTypeBase &operator*() const { return *get(); }
-
-  DITypeRef getTypeDerivedFrom() const { return get()->getBaseType(); }
-
-  /// \brief Return property node, if this ivar is associated with one.
-  MDObjCProperty *getObjCProperty() const {
-    return cast<MDDerivedType>(get())->getObjCProperty();
-  }
-
-  DITypeRef getClassType() const {
-    return cast<MDDerivedType>(get())->getClassType();
-  }
-
-  Constant *getConstant() const {
-    return cast<MDDerivedType>(get())->getConstant();
-  }
-};
-
-/// \brief Types that refer to multiple other types.
-///
-/// This descriptor holds a type that can refer to multiple other types, like a
-/// function or struct.
-///
-/// DICompositeType is derived from DIDerivedType because some
-/// composite types (such as enums) can be derived from basic types
-// FIXME: Make this derive from DIType directly & just store the
-// base type in a single DIType field.
-class DICompositeType : public DIDerivedType {
-  friend class DIBuilder;
-
-public:
-  DICompositeType() = default;
-  DICompositeType(const MDCompositeTypeBase *N) : DIDerivedType(N) {}
-
-  MDCompositeTypeBase *get() const {
-    return cast_or_null<MDCompositeTypeBase>(DIDescriptor::get());
-  }
-  operator MDCompositeTypeBase *() const { return get(); }
-  MDCompositeTypeBase *operator->() const { return get(); }
-  MDCompositeTypeBase &operator*() const { return *get(); }
-
-  DIArray getElements() const { return get()->getElements(); }
-
-  unsigned getRunTimeLang() const { return get()->getRuntimeLang(); }
-  DITypeRef getContainingType() const { return get()->getVTableHolder(); }
-
-  DIArray getTemplateParams() const { return get()->getTemplateParams(); }
-  MDString *getIdentifier() const { return get()->getRawIdentifier(); }
-};
-
-class DISubroutineType : public DICompositeType {
-public:
-  DISubroutineType() = default;
-  DISubroutineType(const MDSubroutineType *N) : DICompositeType(N) {}
-
-  MDSubroutineType *get() const {
-    return cast_or_null<MDSubroutineType>(DIDescriptor::get());
-  }
-  operator MDSubroutineType *() const { return get(); }
-  MDSubroutineType *operator->() const { return get(); }
-  MDSubroutineType &operator*() const { return *get(); }
-
-  MDTypeRefArray getTypeArray() const { return get()->getTypeArray(); }
-};
-
-/// \brief This is a wrapper for a file.
-class DIFile : public DIScope {
-public:
-  DIFile() = default;
-  DIFile(const MDFile *N) : DIScope(N) {}
-
-  MDFile *get() const { return cast_or_null<MDFile>(DIDescriptor::get()); }
-  operator MDFile *() const { return get(); }
-  MDFile *operator->() const { return get(); }
-  MDFile &operator*() const { return *get(); }
-
-  /// \brief Retrieve the MDNode for the directory/file pair.
-  MDNode *getFileNode() const { return get(); }
-};
-
-/// \brief A wrapper for a compile unit.
-class DICompileUnit : public DIScope {
-public:
-  DICompileUnit() = default;
-  DICompileUnit(const MDCompileUnit *N) : DIScope(N) {}
-
-  MDCompileUnit *get() const {
-    return cast_or_null<MDCompileUnit>(DIDescriptor::get());
-  }
-  operator MDCompileUnit *() const { return get(); }
-  MDCompileUnit *operator->() const { return get(); }
-  MDCompileUnit &operator*() const { return *get(); }
-
-  dwarf::SourceLanguage getLanguage() const {
-    return static_cast<dwarf::SourceLanguage>(get()->getSourceLanguage());
-  }
-  StringRef getProducer() const { return get()->getProducer(); }
-  bool isOptimized() const { return get()->isOptimized(); }
-  StringRef getFlags() const { return get()->getFlags(); }
-  unsigned getRunTimeVersion() const { return get()->getRuntimeVersion(); }
-
-  DIArray getEnumTypes() const { return get()->getEnumTypes(); }
-  DIArray getRetainedTypes() const { return get()->getRetainedTypes(); }
-  DIArray getSubprograms() const { return get()->getSubprograms(); }
-  DIArray getGlobalVariables() const { return get()->getGlobalVariables(); }
-  DIArray getImportedEntities() const { return get()->getImportedEntities(); }
-
-  void replaceSubprograms(DIArray Subprograms);
-  void replaceGlobalVariables(DIArray GlobalVariables);
-
-  StringRef getSplitDebugFilename() const {
-    return get()->getSplitDebugFilename();
-  }
-  unsigned getEmissionKind() const { return get()->getEmissionKind(); }
-};
-
-/// \brief This is a wrapper for a subprogram (e.g. a function).
-class DISubprogram : public DIScope {
-public:
-  DISubprogram() = default;
-  DISubprogram(const MDSubprogram *N) : DIScope(N) {}
-
-  MDSubprogram *get() const {
-    return cast_or_null<MDSubprogram>(DIDescriptor::get());
-  }
-  operator MDSubprogram *() const { return get(); }
-  MDSubprogram *operator->() const { return get(); }
-  MDSubprogram &operator*() const { return *get(); }
-
-  StringRef getName() const { return get()->getName(); }
-  StringRef getDisplayName() const { return get()->getDisplayName(); }
-  StringRef getLinkageName() const { return get()->getLinkageName(); }
-  unsigned getLineNumber() const { return get()->getLine(); }
-
-  /// \brief Check if this is local (like 'static' in C).
-  unsigned isLocalToUnit() const { return get()->isLocalToUnit(); }
-  unsigned isDefinition() const { return get()->isDefinition(); }
-
-  unsigned getVirtuality() const { return get()->getVirtuality(); }
-  unsigned getVirtualIndex() const { return get()->getVirtualIndex(); }
-
-  unsigned getFlags() const { return get()->getFlags(); }
-
-  unsigned isOptimized() const { return get()->isOptimized(); }
-
-  /// \brief Get the beginning of the scope of the function (not the name).
-  unsigned getScopeLineNumber() const { return get()->getScopeLine(); }
-
-  DIScopeRef getContext() const { return get()->getScope(); }
-  DISubroutineType getType() const { return get()->getType(); }
-
-  DITypeRef getContainingType() const { return get()->getContainingType(); }
-
-  /// \brief Check if this provides debugging information for the function F.
-  bool describes(const Function *F) const { return get()->describes(F); }
-
-  Function *getFunction() const { return get()->getFunction(); }
-
-  void replaceFunction(Function *F) { get()->replaceFunction(F); }
-  DIArray getTemplateParams() const { return get()->getTemplateParams(); }
-  DISubprogram getFunctionDeclaration() const {
-    return get()->getDeclaration();
-  }
-  DIArray getVariables() const { return DIArray(get()->getVariables()); }
-
-  unsigned isArtificial() const { return get()->isArtificial(); }
-  bool isPrivate() const { return get()->isPrivate(); }
-  bool isProtected() const { return get()->isProtected(); }
-  bool isPublic() const { return get()->isPublic(); }
-  bool isExplicit() const { return get()->isExplicit(); }
-  bool isPrototyped() const { return get()->isPrototyped(); }
-  unsigned isLValueReference() const { return get()->isLValueReference(); }
-  unsigned isRValueReference() const { return get()->isRValueReference(); }
-};
-
-/// \brief This is a wrapper for a lexical block.
-class DILexicalBlock : public DIScope {
-public:
-  DILexicalBlock() = default;
-  DILexicalBlock(const MDLexicalBlockBase *N) : DIScope(N) {}
-
-  MDLexicalBlockBase *get() const {
-    return cast_or_null<MDLexicalBlockBase>(DIDescriptor::get());
-  }
-  operator MDLexicalBlockBase *() const { return get(); }
-  MDLexicalBlockBase *operator->() const { return get(); }
-  MDLexicalBlockBase &operator*() const { return *get(); }
-
-  DIScope getContext() const { return DIScope(get()->getScope()); }
-  unsigned getLineNumber() const {
-    if (auto *N = dyn_cast<MDLexicalBlock>(get()))
-      return N->getLine();
-    return 0;
-  }
-  unsigned getColumnNumber() const {
-    if (auto *N = dyn_cast<MDLexicalBlock>(get()))
-      return N->getColumn();
-    return 0;
-  }
-};
-
-/// \brief This is a wrapper for a lexical block with a filename change.
-class DILexicalBlockFile : public DIScope {
-public:
-  DILexicalBlockFile() = default;
-  DILexicalBlockFile(const MDLexicalBlockFile *N) : DIScope(N) {}
-
-  MDLexicalBlockFile *get() const {
-    return cast_or_null<MDLexicalBlockFile>(DIDescriptor::get());
-  }
-  operator MDLexicalBlockFile *() const { return get(); }
-  MDLexicalBlockFile *operator->() const { return get(); }
-  MDLexicalBlockFile &operator*() const { return *get(); }
-
-  DIScope getContext() const { return get()->getScope(); }
-  unsigned getDiscriminator() const { return get()->getDiscriminator(); }
-};
-
-/// \brief A wrapper for a C++ style name space.
-class DINameSpace : public DIScope {
-public:
-  DINameSpace() = default;
-  DINameSpace(const MDNamespace *N) : DIScope(N) {}
-
-  MDNamespace *get() const {
-    return cast_or_null<MDNamespace>(DIDescriptor::get());
-  }
-  operator MDNamespace *() const { return get(); }
-  MDNamespace *operator->() const { return get(); }
-  MDNamespace &operator*() const { return *get(); }
-
-  StringRef getName() const { return get()->getName(); }
-  unsigned getLineNumber() const { return get()->getLine(); }
-  DIScope getContext() const { return DIScope(get()->getScope()); }
-};
-
-/// \brief This is a wrapper for template type parameter.
-class DITemplateTypeParameter : public DIDescriptor {
-public:
-  DITemplateTypeParameter() = default;
-  DITemplateTypeParameter(const MDTemplateTypeParameter *N) : DIDescriptor(N) {}
-
-  MDTemplateTypeParameter *get() const {
-    return cast_or_null<MDTemplateTypeParameter>(DIDescriptor::get());
-  }
-  operator MDTemplateTypeParameter *() const { return get(); }
-  MDTemplateTypeParameter *operator->() const { return get(); }
-  MDTemplateTypeParameter &operator*() const { return *get(); }
-
-  StringRef getName() const { return get()->getName(); }
-  DITypeRef getType() const { return get()->getType(); }
-};
-
-/// \brief This is a wrapper for template value parameter.
-class DITemplateValueParameter : public DIDescriptor {
-public:
-  DITemplateValueParameter() = default;
-  DITemplateValueParameter(const MDTemplateValueParameter *N)
-      : DIDescriptor(N) {}
-
-  MDTemplateValueParameter *get() const {
-    return cast_or_null<MDTemplateValueParameter>(DIDescriptor::get());
-  }
-  operator MDTemplateValueParameter *() const { return get(); }
-  MDTemplateValueParameter *operator->() const { return get(); }
-  MDTemplateValueParameter &operator*() const { return *get(); }
-
-  StringRef getName() const { return get()->getName(); }
-  DITypeRef getType() const { return get()->getType(); }
-  Metadata *getValue() const { return get()->getValue(); }
-};
-
-/// \brief This is a wrapper for a global variable.
-class DIGlobalVariable : public DIDescriptor {
-  DIFile getFile() const { return DIFile(get()->getFile()); }
-
-public:
-  DIGlobalVariable() = default;
-  DIGlobalVariable(const MDGlobalVariable *N) : DIDescriptor(N) {}
-
-  MDGlobalVariable *get() const {
-    return cast_or_null<MDGlobalVariable>(DIDescriptor::get());
-  }
-  operator MDGlobalVariable *() const { return get(); }
-  MDGlobalVariable *operator->() const { return get(); }
-  MDGlobalVariable &operator*() const { return *get(); }
-
-  StringRef getName() const { return get()->getName(); }
-  StringRef getDisplayName() const { return get()->getDisplayName(); }
-  StringRef getLinkageName() const { return get()->getLinkageName(); }
-  unsigned getLineNumber() const { return get()->getLine(); }
-  unsigned isLocalToUnit() const { return get()->isLocalToUnit(); }
-  unsigned isDefinition() const { return get()->isDefinition(); }
-
-  DIScope getContext() const { return get()->getScope(); }
-  StringRef getFilename() const { return get()->getFilename(); }
-  StringRef getDirectory() const { return get()->getDirectory(); }
-  DITypeRef getType() const { return get()->getType(); }
-
-  Constant *getConstant() const { return get()->getVariable(); }
-  DIDerivedType getStaticDataMemberDeclaration() const {
-    return get()->getStaticDataMemberDeclaration();
-  }
-};
-
-/// \brief This is a wrapper for a variable (e.g. parameter, local, global etc).
-class DIVariable : public DIDescriptor {
-  unsigned getFlags() const { return get()->getFlags(); }
-
-public:
-  DIVariable() = default;
-  DIVariable(const MDLocalVariable *N) : DIDescriptor(N) {}
-
-  MDLocalVariable *get() const {
-    return cast_or_null<MDLocalVariable>(DIDescriptor::get());
-  }
-  operator MDLocalVariable *() const { return get(); }
-  MDLocalVariable *operator->() const { return get(); }
-  MDLocalVariable &operator*() const { return *get(); }
-
-  StringRef getName() const { return get()->getName(); }
-  unsigned getLineNumber() const { return get()->getLine(); }
-  unsigned getArgNumber() const { return get()->getArg(); }
-
-  DIScope getContext() const { return get()->getScope(); }
-  DIFile getFile() const { return get()->getFile(); }
-  DITypeRef getType() const { return get()->getType(); }
-
-  bool isArtificial() const { return get()->isArtificial(); }
-  bool isObjectPointer() const { return get()->isObjectPointer(); }
-
-  /// \brief If this variable is inlined then return inline location.
-  MDNode *getInlinedAt() const { return get()->getInlinedAt(); }
-
-  /// \brief Check if this is a "__block" variable (Apple Blocks).
-  bool isBlockByrefVariable(const DITypeIdentifierMap &Map) const {
-    return (getType().resolve(Map)).isBlockByrefStruct();
-  }
-
-  void printExtendedName(raw_ostream &OS) const;
-};
-
-class DIExpression {
-  MDExpression *N;
-
-public:
-  DIExpression(const MDExpression *N = nullptr)
-      : N(const_cast<MDExpression *>(N)) {}
-
-  operator MDExpression *() const { return N; }
-  MDExpression *operator->() const { return N; }
-  MDExpression &operator*() const { return *N; }
-};
-
-class DILocation {
-  MDLocation *N;
-
-public:
-  DILocation(const MDLocation *N = nullptr) : N(const_cast<MDLocation *>(N)) {}
-
-  operator MDLocation *() const { return N; }
-  MDLocation *operator->() const { return N; }
-  MDLocation &operator*() const { return *N; }
-};
-
-class DIObjCProperty {
-  MDObjCProperty *N;
-
-public:
-  DIObjCProperty(const MDObjCProperty *N = nullptr)
-      : N(const_cast<MDObjCProperty *>(N)) {}
-
-  operator MDObjCProperty *() const { return N; }
-  MDObjCProperty *operator->() const { return N; }
-  MDObjCProperty &operator*() const { return *N; }
-};
-
-class DIImportedEntity {
-  MDImportedEntity *N;
-
-public:
-  DIImportedEntity(const MDImportedEntity *N = nullptr)
-      : N(const_cast<MDImportedEntity *>(N)) {}
-
-  operator DIDescriptor() const { return N; }
-  operator MDImportedEntity *() const { return N; }
-  MDImportedEntity *operator->() const { return N; }
-  MDImportedEntity &operator*() const { return *N; }
-};
-
-#define SIMPLIFY_DESCRIPTOR(DESC)                                              \
-  template <> struct simplify_type<const DESC> {                               \
-    typedef Metadata *SimpleType;                                              \
-    static SimpleType getSimplifiedValue(const DESC &DI) { return DI; }        \
-  };                                                                           \
-  template <> struct simplify_type<DESC> : simplify_type<const DESC> {};
-SIMPLIFY_DESCRIPTOR(DIDescriptor)
-SIMPLIFY_DESCRIPTOR(DISubrange)
-SIMPLIFY_DESCRIPTOR(DIEnumerator)
-SIMPLIFY_DESCRIPTOR(DIScope)
-SIMPLIFY_DESCRIPTOR(DIType)
-SIMPLIFY_DESCRIPTOR(DIBasicType)
-SIMPLIFY_DESCRIPTOR(DIDerivedType)
-SIMPLIFY_DESCRIPTOR(DICompositeType)
-SIMPLIFY_DESCRIPTOR(DISubroutineType)
-SIMPLIFY_DESCRIPTOR(DIFile)
-SIMPLIFY_DESCRIPTOR(DICompileUnit)
-SIMPLIFY_DESCRIPTOR(DISubprogram)
-SIMPLIFY_DESCRIPTOR(DILexicalBlock)
-SIMPLIFY_DESCRIPTOR(DILexicalBlockFile)
-SIMPLIFY_DESCRIPTOR(DINameSpace)
-SIMPLIFY_DESCRIPTOR(DITemplateTypeParameter)
-SIMPLIFY_DESCRIPTOR(DITemplateValueParameter)
-SIMPLIFY_DESCRIPTOR(DIGlobalVariable)
-SIMPLIFY_DESCRIPTOR(DIVariable)
-SIMPLIFY_DESCRIPTOR(DIExpression)
-SIMPLIFY_DESCRIPTOR(DILocation)
-SIMPLIFY_DESCRIPTOR(DIObjCProperty)
-SIMPLIFY_DESCRIPTOR(DIImportedEntity)
-#undef SIMPLIFY_DESCRIPTOR
+typedef DenseMap<const MDString *, DIType *> DITypeIdentifierMap;
 
 /// \brief Find subprogram that is enclosing this scope.
-DISubprogram getDISubprogram(const MDNode *Scope);
+DISubprogram *getDISubprogram(const MDNode *Scope);
 
 /// \brief Find debug info for a given function.
-/// \returns a valid DISubprogram, if found. Otherwise, it returns an empty
-/// DISubprogram.
-DISubprogram getDISubprogram(const Function *F);
-
-/// \brief Find underlying composite type.
-DICompositeType getDICompositeType(DIType T);
-
-/// \brief Create a new inlined variable based on current variable.
 ///
-/// @param DV            Current Variable.
-/// @param InlinedScope  Location at current variable is inlined.
-DIVariable createInlinedVariable(MDNode *DV, MDNode *InlinedScope,
-                                 LLVMContext &VMContext);
-
-/// \brief Remove inlined scope from the variable.
-DIVariable cleanseInlinedVariable(MDNode *DV, LLVMContext &VMContext);
+/// \returns a valid subprogram, if found. Otherwise, return \c nullptr.
+DISubprogram *getDISubprogram(const Function *F);
 
 /// \brief Generate map by visiting all retained types.
 DITypeIdentifierMap generateDITypeIdentifierMap(const NamedMDNode *CU_Nodes);
@@ -784,8 +77,8 @@ public:
   void processDeclare(const Module &M, const DbgDeclareInst *DDI);
   /// \brief Process DbgValueInst.
   void processValue(const Module &M, const DbgValueInst *DVI);
-  /// \brief Process DILocation.
-  void processLocation(const Module &M, DILocation Loc);
+  /// \brief Process debug info location.
+  void processLocation(const Module &M, const DILocation *Loc);
 
   /// \brief Clear all lists.
   void reset();
@@ -793,41 +86,42 @@ public:
 private:
   void InitializeTypeMap(const Module &M);
 
-  void processType(DIType DT);
-  void processSubprogram(DISubprogram SP);
-  void processScope(DIScope Scope);
-  bool addCompileUnit(DICompileUnit CU);
-  bool addGlobalVariable(DIGlobalVariable DIG);
-  bool addSubprogram(DISubprogram SP);
-  bool addType(DIType DT);
-  bool addScope(DIScope Scope);
+  void processType(DIType *DT);
+  void processSubprogram(DISubprogram *SP);
+  void processScope(DIScope *Scope);
+  bool addCompileUnit(DICompileUnit *CU);
+  bool addGlobalVariable(DIGlobalVariable *DIG);
+  bool addSubprogram(DISubprogram *SP);
+  bool addType(DIType *DT);
+  bool addScope(DIScope *Scope);
 
 public:
-  typedef SmallVectorImpl<DICompileUnit>::const_iterator compile_unit_iterator;
-  typedef SmallVectorImpl<DISubprogram>::const_iterator subprogram_iterator;
-  typedef SmallVectorImpl<DIGlobalVariable>::const_iterator
+  typedef SmallVectorImpl<DICompileUnit *>::const_iterator
+      compile_unit_iterator;
+  typedef SmallVectorImpl<DISubprogram *>::const_iterator subprogram_iterator;
+  typedef SmallVectorImpl<DIGlobalVariable *>::const_iterator
       global_variable_iterator;
-  typedef SmallVectorImpl<DIType>::const_iterator type_iterator;
-  typedef SmallVectorImpl<DIScope>::const_iterator scope_iterator;
+  typedef SmallVectorImpl<DIType *>::const_iterator type_iterator;
+  typedef SmallVectorImpl<DIScope *>::const_iterator scope_iterator;
 
   iterator_range<compile_unit_iterator> compile_units() const {
-    return iterator_range<compile_unit_iterator>(CUs.begin(), CUs.end());
+    return make_range(CUs.begin(), CUs.end());
   }
 
   iterator_range<subprogram_iterator> subprograms() const {
-    return iterator_range<subprogram_iterator>(SPs.begin(), SPs.end());
+    return make_range(SPs.begin(), SPs.end());
   }
 
   iterator_range<global_variable_iterator> global_variables() const {
-    return iterator_range<global_variable_iterator>(GVs.begin(), GVs.end());
+    return make_range(GVs.begin(), GVs.end());
   }
 
   iterator_range<type_iterator> types() const {
-    return iterator_range<type_iterator>(TYs.begin(), TYs.end());
+    return make_range(TYs.begin(), TYs.end());
   }
 
   iterator_range<scope_iterator> scopes() const {
-    return iterator_range<scope_iterator>(Scopes.begin(), Scopes.end());
+    return make_range(Scopes.begin(), Scopes.end());
   }
 
   unsigned compile_unit_count() const { return CUs.size(); }
@@ -837,20 +131,18 @@ public:
   unsigned scope_count() const { return Scopes.size(); }
 
 private:
-  SmallVector<DICompileUnit, 8> CUs;
-  SmallVector<DISubprogram, 8> SPs;
-  SmallVector<DIGlobalVariable, 8> GVs;
-  SmallVector<DIType, 8> TYs;
-  SmallVector<DIScope, 8> Scopes;
-  SmallPtrSet<MDNode *, 64> NodesSeen;
+  SmallVector<DICompileUnit *, 8> CUs;
+  SmallVector<DISubprogram *, 8> SPs;
+  SmallVector<DIGlobalVariable *, 8> GVs;
+  SmallVector<DIType *, 8> TYs;
+  SmallVector<DIScope *, 8> Scopes;
+  SmallPtrSet<const MDNode *, 64> NodesSeen;
   DITypeIdentifierMap TypeIdentifierMap;
 
   /// \brief Specify if TypeIdentifierMap is initialized.
   bool TypeMapInitialized;
 };
 
-DenseMap<const Function *, DISubprogram> makeSubprogramMap(const Module &M);
-
 } // end namespace llvm
 
 #endif