[CodeView] Move CodeView YAML code to ObjectYAML.

This is the beginning of an effort to move the codeview yaml
reader / writer into ObjectYAML so that it can be shared.
Currently the only consumer / producer of CodeView YAML is
llvm-pdbdump, but CodeView can exist outside of PDB files, and
indeed is put into object files and passed to the linker to
produce PDB files.  Furthermore, there are subtle differences
in the types of records that show up in object file CodeView
vs PDB file CodeView, but they are otherwise 99% the same.

By having this code in ObjectYAML, we can have llvm-pdbdump
reuse this code, while teaching obj2yaml and yaml2obj to use
this syntax for dealing with object files that can contain
CodeView.

This patch only adds support for CodeView type information
to ObjectYAML.  Subsequent patches will add support for
CodeView symbol information.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@304248 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 761 insertions, 1 deletions

diff --git a/lib/ObjectYAML/CMakeLists.txt b/lib/ObjectYAML/CMakeLists.txt
index 37f8fd7bce1a..237a409d70bd 100644
--- a/lib/ObjectYAML/CMakeLists.txt
+++ b/lib/ObjectYAML/CMakeLists.txt
@@ -1,4 +1,5 @@
 add_llvm_library(LLVMObjectYAML
+  CodeViewYAML.cpp
   COFFYAML.cpp
   DWARFEmitter.cpp
   DWARFVisitor.cpp
diff --git a/lib/ObjectYAML/CodeViewYAML.cpp b/lib/ObjectYAML/CodeViewYAML.cpp
new file mode 100644
index 000000000000..9e0ab6f98697
--- /dev/null
+++ b/lib/ObjectYAML/CodeViewYAML.cpp
@@ -0,0 +1,759 @@
+//===- CodeViewYAML.cpp - CodeView YAMLIO implementation ------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines classes for handling the YAML representation of CodeView
+// Debug Info.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ObjectYAML/CodeViewYAML.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/StringSwitch.h"
+#include "llvm/DebugInfo/CodeView/CVTypeVisitor.h"
+#include "llvm/DebugInfo/CodeView/CodeViewError.h"
+
+using namespace llvm;
+using namespace llvm::codeview;
+using namespace llvm::CodeViewYAML;
+using namespace llvm::CodeViewYAML::detail;
+using namespace llvm::yaml;
+
+LLVM_YAML_IS_SEQUENCE_VECTOR(SourceFileChecksumEntry)
+LLVM_YAML_IS_SEQUENCE_VECTOR(SourceLineEntry)
+LLVM_YAML_IS_SEQUENCE_VECTOR(SourceColumnEntry)
+LLVM_YAML_IS_SEQUENCE_VECTOR(SourceLineBlock)
+LLVM_YAML_IS_SEQUENCE_VECTOR(SourceLineInfo)
+LLVM_YAML_IS_SEQUENCE_VECTOR(InlineeSite)
+LLVM_YAML_IS_SEQUENCE_VECTOR(InlineeInfo)
+LLVM_YAML_IS_SEQUENCE_VECTOR(OneMethodRecord)
+LLVM_YAML_IS_SEQUENCE_VECTOR(StringRef)
+LLVM_YAML_IS_SEQUENCE_VECTOR(uint32_t)
+LLVM_YAML_IS_SEQUENCE_VECTOR(VFTableSlotKind)
+LLVM_YAML_IS_SEQUENCE_VECTOR(TypeIndex)
+
+LLVM_YAML_DECLARE_MAPPING_TRAITS(llvm::codeview::OneMethodRecord)
+LLVM_YAML_DECLARE_MAPPING_TRAITS(llvm::codeview::MemberPointerInfo)
+
+namespace llvm {
+namespace CodeViewYAML {
+namespace detail {
+
+struct LeafRecordBase {
+  TypeLeafKind Kind;
+  explicit LeafRecordBase(TypeLeafKind K) : Kind(K) {}
+
+  virtual ~LeafRecordBase() {}
+  virtual void map(yaml::IO &io) = 0;
+  virtual CVType toCodeViewRecord(BumpPtrAllocator &Allocator) const = 0;
+  virtual Error fromCodeViewRecord(CVType Type) = 0;
+};
+
+template <typename T> struct LeafRecordImpl : public LeafRecordBase {
+  explicit LeafRecordImpl(TypeLeafKind K)
+      : LeafRecordBase(K), Record(static_cast<TypeRecordKind>(K)) {}
+
+  void map(yaml::IO &io) override;
+
+  Error fromCodeViewRecord(CVType Type) override {
+    return TypeDeserializer::deserializeAs<T>(Type, Record);
+  }
+
+  CVType toCodeViewRecord(BumpPtrAllocator &Allocator) const override {
+    TypeTableBuilder Table(Allocator);
+    Table.writeKnownType(Record);
+    return CVType(Kind, Table.records().front());
+  }
+
+  mutable T Record;
+};
+
+template <> struct LeafRecordImpl<FieldListRecord> : public LeafRecordBase {
+  explicit LeafRecordImpl(TypeLeafKind K) : LeafRecordBase(K) {}
+
+  void map(yaml::IO &io) override;
+  CVType toCodeViewRecord(BumpPtrAllocator &Allocator) const override;
+  Error fromCodeViewRecord(CVType Type) override;
+
+  std::vector<MemberRecord> Members;
+};
+
+struct MemberRecordBase {
+  TypeLeafKind Kind;
+  explicit MemberRecordBase(TypeLeafKind K) : Kind(K) {}
+
+  virtual ~MemberRecordBase() {}
+  virtual void map(yaml::IO &io) = 0;
+  virtual void writeTo(FieldListRecordBuilder &FLRB) = 0;
+};
+
+template <typename T> struct MemberRecordImpl : public MemberRecordBase {
+  explicit MemberRecordImpl(TypeLeafKind K)
+      : MemberRecordBase(K), Record(static_cast<TypeRecordKind>(K)) {}
+  void map(yaml::IO &io) override;
+
+  void writeTo(FieldListRecordBuilder &FLRB) override {
+    FLRB.writeMemberType(Record);
+  }
+
+  mutable T Record;
+};
+}
+}
+}
+
+void ScalarTraits<TypeIndex>::output(const TypeIndex &S, void *,
+                                     llvm::raw_ostream &OS) {
+  OS << S.getIndex();
+}
+
+StringRef ScalarTraits<TypeIndex>::input(StringRef Scalar, void *Ctx,
+                                         TypeIndex &S) {
+  uint32_t I;
+  StringRef Result = ScalarTraits<uint32_t>::input(Scalar, Ctx, I);
+  S.setIndex(I);
+  return Result;
+}
+
+void ScalarTraits<APSInt>::output(const APSInt &S, void *,
+                                  llvm::raw_ostream &OS) {
+  S.print(OS, true);
+}
+
+StringRef ScalarTraits<APSInt>::input(StringRef Scalar, void *Ctx, APSInt &S) {
+  S = APSInt(Scalar);
+  return "";
+}
+
+void ScalarEnumerationTraits<TypeLeafKind>::enumeration(IO &io,
+                                                        TypeLeafKind &Value) {
+#define CV_TYPE(name, val) io.enumCase(Value, #name, name);
+#include "llvm/DebugInfo/CodeView/CodeViewTypes.def"
+#undef CV_TYPE
+}
+
+void ScalarEnumerationTraits<PointerToMemberRepresentation>::enumeration(
+    IO &IO, PointerToMemberRepresentation &Value) {
+  IO.enumCase(Value, "Unknown", PointerToMemberRepresentation::Unknown);
+  IO.enumCase(Value, "SingleInheritanceData",
+              PointerToMemberRepresentation::SingleInheritanceData);
+  IO.enumCase(Value, "MultipleInheritanceData",
+              PointerToMemberRepresentation::MultipleInheritanceData);
+  IO.enumCase(Value, "VirtualInheritanceData",
+              PointerToMemberRepresentation::VirtualInheritanceData);
+  IO.enumCase(Value, "GeneralData", PointerToMemberRepresentation::GeneralData);
+  IO.enumCase(Value, "SingleInheritanceFunction",
+              PointerToMemberRepresentation::SingleInheritanceFunction);
+  IO.enumCase(Value, "MultipleInheritanceFunction",
+              PointerToMemberRepresentation::MultipleInheritanceFunction);
+  IO.enumCase(Value, "VirtualInheritanceFunction",
+              PointerToMemberRepresentation::VirtualInheritanceFunction);
+  IO.enumCase(Value, "GeneralFunction",
+              PointerToMemberRepresentation::GeneralFunction);
+}
+
+void ScalarEnumerationTraits<VFTableSlotKind>::enumeration(
+    IO &IO, VFTableSlotKind &Kind) {
+  IO.enumCase(Kind, "Near16", VFTableSlotKind::Near16);
+  IO.enumCase(Kind, "Far16", VFTableSlotKind::Far16);
+  IO.enumCase(Kind, "This", VFTableSlotKind::This);
+  IO.enumCase(Kind, "Outer", VFTableSlotKind::Outer);
+  IO.enumCase(Kind, "Meta", VFTableSlotKind::Meta);
+  IO.enumCase(Kind, "Near", VFTableSlotKind::Near);
+  IO.enumCase(Kind, "Far", VFTableSlotKind::Far);
+}
+
+void ScalarEnumerationTraits<CallingConvention>::enumeration(
+    IO &IO, CallingConvention &Value) {
+  IO.enumCase(Value, "NearC", CallingConvention::NearC);
+  IO.enumCase(Value, "FarC", CallingConvention::FarC);
+  IO.enumCase(Value, "NearPascal", CallingConvention::NearPascal);
+  IO.enumCase(Value, "FarPascal", CallingConvention::FarPascal);
+  IO.enumCase(Value, "NearFast", CallingConvention::NearFast);
+  IO.enumCase(Value, "FarFast", CallingConvention::FarFast);
+  IO.enumCase(Value, "NearStdCall", CallingConvention::NearStdCall);
+  IO.enumCase(Value, "FarStdCall", CallingConvention::FarStdCall);
+  IO.enumCase(Value, "NearSysCall", CallingConvention::NearSysCall);
+  IO.enumCase(Value, "FarSysCall", CallingConvention::FarSysCall);
+  IO.enumCase(Value, "ThisCall", CallingConvention::ThisCall);
+  IO.enumCase(Value, "MipsCall", CallingConvention::MipsCall);
+  IO.enumCase(Value, "Generic", CallingConvention::Generic);
+  IO.enumCase(Value, "AlphaCall", CallingConvention::AlphaCall);
+  IO.enumCase(Value, "PpcCall", CallingConvention::PpcCall);
+  IO.enumCase(Value, "SHCall", CallingConvention::SHCall);
+  IO.enumCase(Value, "ArmCall", CallingConvention::ArmCall);
+  IO.enumCase(Value, "AM33Call", CallingConvention::AM33Call);
+  IO.enumCase(Value, "TriCall", CallingConvention::TriCall);
+  IO.enumCase(Value, "SH5Call", CallingConvention::SH5Call);
+  IO.enumCase(Value, "M32RCall", CallingConvention::M32RCall);
+  IO.enumCase(Value, "ClrCall", CallingConvention::ClrCall);
+  IO.enumCase(Value, "Inline", CallingConvention::Inline);
+  IO.enumCase(Value, "NearVector", CallingConvention::NearVector);
+}
+
+void ScalarEnumerationTraits<PointerKind>::enumeration(IO &IO,
+                                                       PointerKind &Kind) {
+  IO.enumCase(Kind, "Near16", PointerKind::Near16);
+  IO.enumCase(Kind, "Far16", PointerKind::Far16);
+  IO.enumCase(Kind, "Huge16", PointerKind::Huge16);
+  IO.enumCase(Kind, "BasedOnSegment", PointerKind::BasedOnSegment);
+  IO.enumCase(Kind, "BasedOnValue", PointerKind::BasedOnValue);
+  IO.enumCase(Kind, "BasedOnSegmentValue", PointerKind::BasedOnSegmentValue);
+  IO.enumCase(Kind, "BasedOnAddress", PointerKind::BasedOnAddress);
+  IO.enumCase(Kind, "BasedOnSegmentAddress",
+              PointerKind::BasedOnSegmentAddress);
+  IO.enumCase(Kind, "BasedOnType", PointerKind::BasedOnType);
+  IO.enumCase(Kind, "BasedOnSelf", PointerKind::BasedOnSelf);
+  IO.enumCase(Kind, "Near32", PointerKind::Near32);
+  IO.enumCase(Kind, "Far32", PointerKind::Far32);
+  IO.enumCase(Kind, "Near64", PointerKind::Near64);
+}
+
+void ScalarEnumerationTraits<PointerMode>::enumeration(IO &IO,
+                                                       PointerMode &Mode) {
+  IO.enumCase(Mode, "Pointer", PointerMode::Pointer);
+  IO.enumCase(Mode, "LValueReference", PointerMode::LValueReference);
+  IO.enumCase(Mode, "PointerToDataMember", PointerMode::PointerToDataMember);
+  IO.enumCase(Mode, "PointerToMemberFunction",
+              PointerMode::PointerToMemberFunction);
+  IO.enumCase(Mode, "RValueReference", PointerMode::RValueReference);
+}
+
+void ScalarEnumerationTraits<HfaKind>::enumeration(IO &IO, HfaKind &Value) {
+  IO.enumCase(Value, "None", HfaKind::None);
+  IO.enumCase(Value, "Float", HfaKind::Float);
+  IO.enumCase(Value, "Double", HfaKind::Double);
+  IO.enumCase(Value, "Other", HfaKind::Other);
+}
+
+void ScalarEnumerationTraits<MemberAccess>::enumeration(IO &IO,
+                                                        MemberAccess &Access) {
+  IO.enumCase(Access, "None", MemberAccess::None);
+  IO.enumCase(Access, "Private", MemberAccess::Private);
+  IO.enumCase(Access, "Protected", MemberAccess::Protected);
+  IO.enumCase(Access, "Public", MemberAccess::Public);
+}
+
+void ScalarEnumerationTraits<MethodKind>::enumeration(IO &IO,
+                                                      MethodKind &Kind) {
+  IO.enumCase(Kind, "Vanilla", MethodKind::Vanilla);
+  IO.enumCase(Kind, "Virtual", MethodKind::Virtual);
+  IO.enumCase(Kind, "Static", MethodKind::Static);
+  IO.enumCase(Kind, "Friend", MethodKind::Friend);
+  IO.enumCase(Kind, "IntroducingVirtual", MethodKind::IntroducingVirtual);
+  IO.enumCase(Kind, "PureVirtual", MethodKind::PureVirtual);
+  IO.enumCase(Kind, "PureIntroducingVirtual",
+              MethodKind::PureIntroducingVirtual);
+}
+
+void ScalarEnumerationTraits<WindowsRTClassKind>::enumeration(
+    IO &IO, WindowsRTClassKind &Value) {
+  IO.enumCase(Value, "None", WindowsRTClassKind::None);
+  IO.enumCase(Value, "Ref", WindowsRTClassKind::RefClass);
+  IO.enumCase(Value, "Value", WindowsRTClassKind::ValueClass);
+  IO.enumCase(Value, "Interface", WindowsRTClassKind::Interface);
+}
+
+void ScalarEnumerationTraits<LabelType>::enumeration(IO &IO, LabelType &Value) {
+  IO.enumCase(Value, "Near", LabelType::Near);
+  IO.enumCase(Value, "Far", LabelType::Far);
+}
+
+void ScalarBitSetTraits<PointerOptions>::bitset(IO &IO,
+                                                PointerOptions &Options) {
+  IO.bitSetCase(Options, "None", PointerOptions::None);
+  IO.bitSetCase(Options, "Flat32", PointerOptions::Flat32);
+  IO.bitSetCase(Options, "Volatile", PointerOptions::Volatile);
+  IO.bitSetCase(Options, "Const", PointerOptions::Const);
+  IO.bitSetCase(Options, "Unaligned", PointerOptions::Unaligned);
+  IO.bitSetCase(Options, "Restrict", PointerOptions::Restrict);
+  IO.bitSetCase(Options, "WinRTSmartPointer",
+                PointerOptions::WinRTSmartPointer);
+}
+
+void ScalarBitSetTraits<ModifierOptions>::bitset(IO &IO,
+                                                 ModifierOptions &Options) {
+  IO.bitSetCase(Options, "None", ModifierOptions::None);
+  IO.bitSetCase(Options, "Const", ModifierOptions::Const);
+  IO.bitSetCase(Options, "Volatile", ModifierOptions::Volatile);
+  IO.bitSetCase(Options, "Unaligned", ModifierOptions::Unaligned);
+}
+
+void ScalarBitSetTraits<FunctionOptions>::bitset(IO &IO,
+                                                 FunctionOptions &Options) {
+  IO.bitSetCase(Options, "None", FunctionOptions::None);
+  IO.bitSetCase(Options, "CxxReturnUdt", FunctionOptions::CxxReturnUdt);
+  IO.bitSetCase(Options, "Constructor", FunctionOptions::Constructor);
+  IO.bitSetCase(Options, "ConstructorWithVirtualBases",
+                FunctionOptions::ConstructorWithVirtualBases);
+}
+
+void ScalarBitSetTraits<ClassOptions>::bitset(IO &IO, ClassOptions &Options) {
+  IO.bitSetCase(Options, "None", ClassOptions::None);
+  IO.bitSetCase(Options, "HasConstructorOrDestructor",
+                ClassOptions::HasConstructorOrDestructor);
+  IO.bitSetCase(Options, "HasOverloadedOperator",
+                ClassOptions::HasOverloadedOperator);
+  IO.bitSetCase(Options, "Nested", ClassOptions::Nested);
+  IO.bitSetCase(Options, "ContainsNestedClass",
+                ClassOptions::ContainsNestedClass);
+  IO.bitSetCase(Options, "HasOverloadedAssignmentOperator",
+                ClassOptions::HasOverloadedAssignmentOperator);
+  IO.bitSetCase(Options, "HasConversionOperator",
+                ClassOptions::HasConversionOperator);
+  IO.bitSetCase(Options, "ForwardReference", ClassOptions::ForwardReference);
+  IO.bitSetCase(Options, "Scoped", ClassOptions::Scoped);
+  IO.bitSetCase(Options, "HasUniqueName", ClassOptions::HasUniqueName);
+  IO.bitSetCase(Options, "Sealed", ClassOptions::Sealed);
+  IO.bitSetCase(Options, "Intrinsic", ClassOptions::Intrinsic);
+}
+
+void ScalarBitSetTraits<MethodOptions>::bitset(IO &IO, MethodOptions &Options) {
+  IO.bitSetCase(Options, "None", MethodOptions::None);
+  IO.bitSetCase(Options, "Pseudo", MethodOptions::Pseudo);
+  IO.bitSetCase(Options, "NoInherit", MethodOptions::NoInherit);
+  IO.bitSetCase(Options, "NoConstruct", MethodOptions::NoConstruct);
+  IO.bitSetCase(Options, "CompilerGenerated", MethodOptions::CompilerGenerated);
+  IO.bitSetCase(Options, "Sealed", MethodOptions::Sealed);
+}
+
+void ScalarEnumerationTraits<FileChecksumKind>::enumeration(
+    IO &io, FileChecksumKind &Kind) {
+  io.enumCase(Kind, "None", FileChecksumKind::None);
+  io.enumCase(Kind, "MD5", FileChecksumKind::MD5);
+  io.enumCase(Kind, "SHA1", FileChecksumKind::SHA1);
+  io.enumCase(Kind, "SHA256", FileChecksumKind::SHA256);
+}
+
+void ScalarBitSetTraits<LineFlags>::bitset(IO &io, LineFlags &Flags) {
+  io.bitSetCase(Flags, "HasColumnInfo", LF_HaveColumns);
+  io.enumFallback<Hex16>(Flags);
+}
+
+void ScalarTraits<HexFormattedString>::output(const HexFormattedString &Value,
+                                              void *ctx, raw_ostream &Out) {
+  StringRef Bytes(reinterpret_cast<const char *>(Value.Bytes.data()),
+                  Value.Bytes.size());
+  Out << toHex(Bytes);
+}
+
+StringRef ScalarTraits<HexFormattedString>::input(StringRef Scalar, void *ctxt,
+                                                  HexFormattedString &Value) {
+  std::string H = fromHex(Scalar);
+  Value.Bytes.assign(H.begin(), H.end());
+  return StringRef();
+}
+
+void MappingTraits<SourceLineEntry>::mapping(IO &IO, SourceLineEntry &Obj) {
+  IO.mapRequired("Offset", Obj.Offset);
+  IO.mapRequired("LineStart", Obj.LineStart);
+  IO.mapRequired("IsStatement", Obj.IsStatement);
+  IO.mapRequired("EndDelta", Obj.EndDelta);
+}
+
+void MappingTraits<SourceColumnEntry>::mapping(IO &IO, SourceColumnEntry &Obj) {
+  IO.mapRequired("StartColumn", Obj.StartColumn);
+  IO.mapRequired("EndColumn", Obj.EndColumn);
+}
+
+void MappingTraits<SourceLineBlock>::mapping(IO &IO, SourceLineBlock &Obj) {
+  IO.mapRequired("FileName", Obj.FileName);
+  IO.mapRequired("Lines", Obj.Lines);
+  IO.mapRequired("Columns", Obj.Columns);
+}
+
+void MappingTraits<SourceFileChecksumEntry>::mapping(
+    IO &IO, SourceFileChecksumEntry &Obj) {
+  IO.mapRequired("FileName", Obj.FileName);
+  IO.mapRequired("Kind", Obj.Kind);
+  IO.mapRequired("Checksum", Obj.ChecksumBytes);
+}
+
+void MappingTraits<SourceLineInfo>::mapping(IO &IO, SourceLineInfo &Obj) {
+  IO.mapRequired("CodeSize", Obj.CodeSize);
+
+  IO.mapRequired("Flags", Obj.Flags);
+  IO.mapRequired("RelocOffset", Obj.RelocOffset);
+  IO.mapRequired("RelocSegment", Obj.RelocSegment);
+  IO.mapRequired("Blocks", Obj.Blocks);
+}
+
+void MappingTraits<SourceFileInfo>::mapping(IO &IO, SourceFileInfo &Obj) {
+  IO.mapOptional("Checksums", Obj.FileChecksums);
+  IO.mapOptional("Lines", Obj.LineFragments);
+  IO.mapOptional("InlineeLines", Obj.Inlinees);
+}
+
+void MappingTraits<InlineeSite>::mapping(IO &IO, InlineeSite &Obj) {
+  IO.mapRequired("FileName", Obj.FileName);
+  IO.mapRequired("LineNum", Obj.SourceLineNum);
+  IO.mapRequired("Inlinee", Obj.Inlinee);
+  IO.mapOptional("ExtraFiles", Obj.ExtraFiles);
+}
+
+void MappingTraits<InlineeInfo>::mapping(IO &IO, InlineeInfo &Obj) {
+  IO.mapRequired("HasExtraFiles", Obj.HasExtraFiles);
+  IO.mapRequired("Sites", Obj.Sites);
+}
+
+void MappingTraits<MemberPointerInfo>::mapping(IO &IO, MemberPointerInfo &MPI) {
+  IO.mapRequired("ContainingType", MPI.ContainingType);
+  IO.mapRequired("Representation", MPI.Representation);
+}
+
+template <> void LeafRecordImpl<ModifierRecord>::map(IO &IO) {
+  IO.mapRequired("ModifiedType", Record.ModifiedType);
+  IO.mapRequired("Modifiers", Record.Modifiers);
+}
+
+template <> void LeafRecordImpl<ProcedureRecord>::map(IO &IO) {
+  IO.mapRequired("ReturnType", Record.ReturnType);
+  IO.mapRequired("CallConv", Record.CallConv);
+  IO.mapRequired("Options", Record.Options);
+  IO.mapRequired("ParameterCount", Record.ParameterCount);
+  IO.mapRequired("ArgumentList", Record.ArgumentList);
+}
+
+template <> void LeafRecordImpl<MemberFunctionRecord>::map(IO &IO) {
+  IO.mapRequired("ReturnType", Record.ReturnType);
+  IO.mapRequired("ClassType", Record.ClassType);
+  IO.mapRequired("ThisType", Record.ThisType);
+  IO.mapRequired("CallConv", Record.CallConv);
+  IO.mapRequired("Options", Record.Options);
+  IO.mapRequired("ParameterCount", Record.ParameterCount);
+  IO.mapRequired("ArgumentList", Record.ArgumentList);
+  IO.mapRequired("ThisPointerAdjustment", Record.ThisPointerAdjustment);
+}
+
+template <> void LeafRecordImpl<LabelRecord>::map(IO &IO) {
+  IO.mapRequired("Mode", Record.Mode);
+}
+
+template <> void LeafRecordImpl<MemberFuncIdRecord>::map(IO &IO) {
+  IO.mapRequired("ClassType", Record.ClassType);
+  IO.mapRequired("FunctionType", Record.FunctionType);
+  IO.mapRequired("Name", Record.Name);
+}
+
+template <> void LeafRecordImpl<ArgListRecord>::map(IO &IO) {
+  IO.mapRequired("ArgIndices", Record.ArgIndices);
+}
+
+template <> void LeafRecordImpl<StringListRecord>::map(IO &IO) {
+  IO.mapRequired("StringIndices", Record.StringIndices);
+}
+
+template <> void LeafRecordImpl<PointerRecord>::map(IO &IO) {
+  IO.mapRequired("ReferentType", Record.ReferentType);
+  IO.mapRequired("Attrs", Record.Attrs);
+  IO.mapOptional("MemberInfo", Record.MemberInfo);
+}
+
+template <> void LeafRecordImpl<ArrayRecord>::map(IO &IO) {
+  IO.mapRequired("ElementType", Record.ElementType);
+  IO.mapRequired("IndexType", Record.IndexType);
+  IO.mapRequired("Size", Record.Size);
+  IO.mapRequired("Name", Record.Name);
+}
+
+void LeafRecordImpl<FieldListRecord>::map(IO &IO) {
+  IO.mapRequired("FieldList", Members);
+}
+
+namespace {
+class MemberRecordConversionVisitor : public TypeVisitorCallbacks {
+public:
+  explicit MemberRecordConversionVisitor(std::vector<MemberRecord> &Records)
+      : Records(Records) {}
+
+#define TYPE_RECORD(EnumName, EnumVal, Name)
+#define MEMBER_RECORD(EnumName, EnumVal, Name)                                 \
+  Error visitKnownMember(CVMemberRecord &CVR, Name##Record &Record) override { \
+    return visitKnownMemberImpl(Record);                                       \
+  }
+#define TYPE_RECORD_ALIAS(EnumName, EnumVal, Name, AliasName)
+#define MEMBER_RECORD_ALIAS(EnumName, EnumVal, Name, AliasName)
+#include "llvm/DebugInfo/CodeView/CodeViewTypes.def"
+private:
+  template <typename T> Error visitKnownMemberImpl(T &Record) {
+    TypeLeafKind K = static_cast<TypeLeafKind>(Record.getKind());
+    auto Impl = std::make_shared<MemberRecordImpl<T>>(K);
+    Impl->Record = Record;
+    Records.push_back(MemberRecord{Impl});
+    return Error::success();
+  }
+
+  std::vector<MemberRecord> &Records;
+};
+}
+
+Error LeafRecordImpl<FieldListRecord>::fromCodeViewRecord(CVType Type) {
+  MemberRecordConversionVisitor V(Members);
+  return visitMemberRecordStream(Type.content(), V);
+}
+
+CVType LeafRecordImpl<FieldListRecord>::toCodeViewRecord(
+    BumpPtrAllocator &Allocator) const {
+  TypeTableBuilder TTB(Allocator);
+  FieldListRecordBuilder FLRB(TTB);
+  FLRB.begin();
+  for (const auto &Member : Members) {
+    Member.Member->writeTo(FLRB);
+  }
+  FLRB.end(true);
+  return CVType(Kind, TTB.records().front());
+}
+
+template <> void LeafRecordImpl<ClassRecord>::map(IO &IO) {
+  IO.mapRequired("MemberCount", Record.MemberCount);
+  IO.mapRequired("Options", Record.Options);
+  IO.mapRequired("FieldList", Record.FieldList);
+  IO.mapRequired("Name", Record.Name);
+  IO.mapRequired("UniqueName", Record.UniqueName);
+
+  IO.mapRequired("DerivationList", Record.DerivationList);
+  IO.mapRequired("VTableShape", Record.VTableShape);
+  IO.mapRequired("Size", Record.Size);
+}
+
+template <> void LeafRecordImpl<UnionRecord>::map(IO &IO) {
+  IO.mapRequired("MemberCount", Record.MemberCount);
+  IO.mapRequired("Options", Record.Options);
+  IO.mapRequired("FieldList", Record.FieldList);
+  IO.mapRequired("Name", Record.Name);
+  IO.mapRequired("UniqueName", Record.UniqueName);
+
+  IO.mapRequired("Size", Record.Size);
+}
+
+template <> void LeafRecordImpl<EnumRecord>::map(IO &IO) {
+  IO.mapRequired("NumEnumerators", Record.MemberCount);
+  IO.mapRequired("Options", Record.Options);
+  IO.mapRequired("FieldList", Record.FieldList);
+  IO.mapRequired("Name", Record.Name);
+  IO.mapRequired("UniqueName", Record.UniqueName);
+
+  IO.mapRequired("UnderlyingType", Record.UnderlyingType);
+}
+
+template <> void LeafRecordImpl<BitFieldRecord>::map(IO &IO) {
+  IO.mapRequired("Type", Record.Type);
+  IO.mapRequired("BitSize", Record.BitSize);
+  IO.mapRequired("BitOffset", Record.BitOffset);
+}
+
+template <> void LeafRecordImpl<VFTableShapeRecord>::map(IO &IO) {
+  IO.mapRequired("Slots", Record.Slots);
+}
+
+template <> void LeafRecordImpl<TypeServer2Record>::map(IO &IO) {
+  IO.mapRequired("Guid", Record.Guid);
+  IO.mapRequired("Age", Record.Age);
+  IO.mapRequired("Name", Record.Name);
+}
+
+template <> void LeafRecordImpl<StringIdRecord>::map(IO &IO) {
+  IO.mapRequired("Id", Record.Id);
+  IO.mapRequired("String", Record.String);
+}
+
+template <> void LeafRecordImpl<FuncIdRecord>::map(IO &IO) {
+  IO.mapRequired("ParentScope", Record.ParentScope);
+  IO.mapRequired("FunctionType", Record.FunctionType);
+  IO.mapRequired("Name", Record.Name);
+}
+
+template <> void LeafRecordImpl<UdtSourceLineRecord>::map(IO &IO) {
+  IO.mapRequired("UDT", Record.UDT);
+  IO.mapRequired("SourceFile", Record.SourceFile);
+  IO.mapRequired("LineNumber", Record.LineNumber);
+}
+
+template <> void LeafRecordImpl<UdtModSourceLineRecord>::map(IO &IO) {
+  IO.mapRequired("UDT", Record.UDT);
+  IO.mapRequired("SourceFile", Record.SourceFile);
+  IO.mapRequired("LineNumber", Record.LineNumber);
+  IO.mapRequired("Module", Record.Module);
+}
+
+template <> void LeafRecordImpl<BuildInfoRecord>::map(IO &IO) {
+  IO.mapRequired("ArgIndices", Record.ArgIndices);
+}
+
+template <> void LeafRecordImpl<VFTableRecord>::map(IO &IO) {
+  IO.mapRequired("CompleteClass", Record.CompleteClass);
+  IO.mapRequired("OverriddenVFTable", Record.OverriddenVFTable);
+  IO.mapRequired("VFPtrOffset", Record.VFPtrOffset);
+  IO.mapRequired("MethodNames", Record.MethodNames);
+}
+
+template <> void LeafRecordImpl<MethodOverloadListRecord>::map(IO &IO) {
+  IO.mapRequired("Methods", Record.Methods);
+}
+
+void MappingTraits<OneMethodRecord>::mapping(IO &io, OneMethodRecord &Record) {
+  io.mapRequired("Type", Record.Type);
+  io.mapRequired("Attrs", Record.Attrs.Attrs);
+  io.mapRequired("VFTableOffset", Record.VFTableOffset);
+  io.mapRequired("Name", Record.Name);
+}
+
+template <> void MemberRecordImpl<OneMethodRecord>::map(IO &IO) {
+  MappingTraits<OneMethodRecord>::mapping(IO, Record);
+}
+
+template <> void MemberRecordImpl<OverloadedMethodRecord>::map(IO &IO) {
+  IO.mapRequired("NumOverloads", Record.NumOverloads);
+  IO.mapRequired("MethodList", Record.MethodList);
+  IO.mapRequired("Name", Record.Name);
+}
+
+template <> void MemberRecordImpl<NestedTypeRecord>::map(IO &IO) {
+  IO.mapRequired("Type", Record.Type);
+  IO.mapRequired("Name", Record.Name);
+}
+
+template <> void MemberRecordImpl<DataMemberRecord>::map(IO &IO) {
+  IO.mapRequired("Attrs", Record.Attrs.Attrs);
+  IO.mapRequired("Type", Record.Type);
+  IO.mapRequired("FieldOffset", Record.FieldOffset);
+  IO.mapRequired("Name", Record.Name);
+}
+
+template <> void MemberRecordImpl<StaticDataMemberRecord>::map(IO &IO) {
+  IO.mapRequired("Attrs", Record.Attrs.Attrs);
+  IO.mapRequired("Type", Record.Type);
+  IO.mapRequired("Name", Record.Name);
+}
+
+template <> void MemberRecordImpl<EnumeratorRecord>::map(IO &IO) {
+  IO.mapRequired("Attrs", Record.Attrs.Attrs);
+  IO.mapRequired("Value", Record.Value);
+  IO.mapRequired("Name", Record.Name);
+}
+
+template <> void MemberRecordImpl<VFPtrRecord>::map(IO &IO) {
+  IO.mapRequired("Type", Record.Type);
+}
+
+template <> void MemberRecordImpl<BaseClassRecord>::map(IO &IO) {
+  IO.mapRequired("Attrs", Record.Attrs.Attrs);
+  IO.mapRequired("Type", Record.Type);
+  IO.mapRequired("Offset", Record.Offset);
+}
+
+template <> void MemberRecordImpl<VirtualBaseClassRecord>::map(IO &IO) {
+  IO.mapRequired("Attrs", Record.Attrs.Attrs);
+  IO.mapRequired("BaseType", Record.BaseType);
+  IO.mapRequired("VBPtrType", Record.VBPtrType);
+  IO.mapRequired("VBPtrOffset", Record.VBPtrOffset);
+  IO.mapRequired("VTableIndex", Record.VTableIndex);
+}
+
+template <> void MemberRecordImpl<ListContinuationRecord>::map(IO &IO) {
+  IO.mapRequired("ContinuationIndex", Record.ContinuationIndex);
+}
+
+template <typename T>
+static inline Expected<LeafRecord> fromCodeViewRecordImpl(CVType Type) {
+  LeafRecord Result;
+
+  auto Impl = std::make_shared<LeafRecordImpl<T>>(Type.kind());
+  if (auto EC = Impl->fromCodeViewRecord(Type))
+    return std::move(EC);
+  Result.Leaf = Impl;
+  return Result;
+}
+
+Expected<LeafRecord> LeafRecord::fromCodeViewRecord(CVType Type) {
+#define TYPE_RECORD(EnumName, EnumVal, ClassName)                              \
+  case EnumName:                                                               \
+    return fromCodeViewRecordImpl<ClassName##Record>(Type);
+#define TYPE_RECORD_ALIAS(EnumName, EnumVal, AliasName, ClassName)             \
+  TYPE_RECORD(EnumName, EnumVal, ClassName)
+#define MEMBER_RECORD(EnumName, EnumVal, ClassName)
+#define MEMBER_RECORD_ALIAS(EnumName, EnumVal, AliasName, ClassName)
+  switch (Type.kind()) {
+#include "llvm/DebugInfo/CodeView/CodeViewTypes.def"
+  default: { llvm_unreachable("Unknown leaf kind!"); }
+  }
+  return make_error<CodeViewError>(cv_error_code::corrupt_record);
+}
+
+CVType LeafRecord::toCodeViewRecord(BumpPtrAllocator &Allocator) const {
+  return Leaf->toCodeViewRecord(Allocator);
+}
+
+template <> struct MappingTraits<LeafRecordBase> {
+  static void mapping(IO &io, LeafRecordBase &Record) { Record.map(io); }
+};
+
+template <typename ConcreteType>
+static void mapLeafRecordImpl(IO &IO, const char *Class, TypeLeafKind Kind,
+                              LeafRecord &Obj) {
+  if (!IO.outputting())
+    Obj.Leaf = std::make_shared<LeafRecordImpl<ConcreteType>>(Kind);
+
+  if (Kind == LF_FIELDLIST)
+    Obj.Leaf->map(IO);
+  else
+    IO.mapRequired(Class, *Obj.Leaf);
+}
+
+void MappingTraits<LeafRecord>::mapping(IO &IO, LeafRecord &Obj) {
+  TypeLeafKind Kind;
+  if (IO.outputting())
+    Kind = Obj.Leaf->Kind;
+  IO.mapRequired("Kind", Kind);
+
+#define TYPE_RECORD(EnumName, EnumVal, ClassName)                              \
+  case EnumName:                                                               \
+    mapLeafRecordImpl<ClassName##Record>(IO, #ClassName, Kind, Obj);           \
+    break;
+#define TYPE_RECORD_ALIAS(EnumName, EnumVal, AliasName, ClassName)             \
+  TYPE_RECORD(EnumName, EnumVal, ClassName)
+#define MEMBER_RECORD(EnumName, EnumVal, ClassName)
+#define MEMBER_RECORD_ALIAS(EnumName, EnumVal, AliasName, ClassName)
+  switch (Kind) {
+#include "llvm/DebugInfo/CodeView/CodeViewTypes.def"
+  default: { llvm_unreachable("Unknown leaf kind!"); }
+  }
+}
+
+template <> struct MappingTraits<MemberRecordBase> {
+  static void mapping(IO &io, MemberRecordBase &Record) { Record.map(io); }
+};
+
+template <typename ConcreteType>
+static void mapMemberRecordImpl(IO &IO, const char *Class, TypeLeafKind Kind,
+                                MemberRecord &Obj) {
+  if (!IO.outputting())
+    Obj.Member = std::make_shared<MemberRecordImpl<ConcreteType>>(Kind);
+
+  IO.mapRequired(Class, *Obj.Member);
+}
+
+void MappingTraits<MemberRecord>::mapping(IO &IO, MemberRecord &Obj) {
+  TypeLeafKind Kind;
+  if (IO.outputting())
+    Kind = Obj.Member->Kind;
+  IO.mapRequired("Kind", Kind);
+
+#define MEMBER_RECORD(EnumName, EnumVal, ClassName)                            \
+  case EnumName:                                                               \
+    mapMemberRecordImpl<ClassName##Record>(IO, #ClassName, Kind, Obj);         \
+    break;
+#define MEMBER_RECORD_ALIAS(EnumName, EnumVal, AliasName, ClassName)           \
+  MEMBER_RECORD(EnumName, EnumVal, ClassName)
+#define TYPE_RECORD(EnumName, EnumVal, ClassName)
+#define TYPE_RECORD_ALIAS(EnumName, EnumVal, AliasName, ClassName)
+  switch (Kind) {
+#include "llvm/DebugInfo/CodeView/CodeViewTypes.def"
+  default: { llvm_unreachable("Unknown member kind!"); }
+  }
+}
diff --git a/lib/ObjectYAML/LLVMBuild.txt b/lib/ObjectYAML/LLVMBuild.txt
index b8d1d2f1779e..44657e916a91 100644
--- a/lib/ObjectYAML/LLVMBuild.txt
+++ b/lib/ObjectYAML/LLVMBuild.txt
@@ -11,4 +11,4 @@
 type = Library
 name = ObjectYAML
 parent = Libraries
-required_libraries = Support
+required_libraries = Support DebugInfoCodeView