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diff --git a/include/llvm/DebugInfo/PDB/PDBTypes.h b/include/llvm/DebugInfo/PDB/PDBTypes.h
new file mode 100644
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+++ b/include/llvm/DebugInfo/PDB/PDBTypes.h
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+//===- PDBTypes.h - Defines enums for various fields contained in PDB ---*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_DEBUGINFO_PDB_PDBTYPES_H
+#define LLVM_DEBUGINFO_PDB_PDBTYPES_H
+
+#include "llvm/Config/llvm-config.h"
+#include <functional>
+#include <stdint.h>
+
+namespace llvm {
+
+class PDBSymDumper;
+class PDBSymbol;
+
+class IPDBDataStream;
+template <class T> class IPDBEnumChildren;
+class IPDBRawSymbol;
+class IPDBSession;
+class IPDBSourceFile;
+
+typedef IPDBEnumChildren<PDBSymbol> IPDBEnumSymbols;
+typedef IPDBEnumChildren<IPDBSourceFile> IPDBEnumSourceFiles;
+typedef IPDBEnumChildren<IPDBDataStream> IPDBEnumDataStreams;
+
+class PDBSymbolExe;
+class PDBSymbolCompiland;
+class PDBSymbolCompilandDetails;
+class PDBSymbolCompilandEnv;
+class PDBSymbolFunc;
+class PDBSymbolBlock;
+class PDBSymbolData;
+class PDBSymbolAnnotation;
+class PDBSymbolLabel;
+class PDBSymbolPublicSymbol;
+class PDBSymbolTypeUDT;
+class PDBSymbolTypeEnum;
+class PDBSymbolTypeFunctionSig;
+class PDBSymbolTypePointer;
+class PDBSymbolTypeArray;
+class PDBSymbolTypeBuiltin;
+class PDBSymbolTypeTypedef;
+class PDBSymbolTypeBaseClass;
+class PDBSymbolTypeFriend;
+class PDBSymbolTypeFunctionArg;
+class PDBSymbolFuncDebugStart;
+class PDBSymbolFuncDebugEnd;
+class PDBSymbolUsingNamespace;
+class PDBSymbolTypeVTableShape;
+class PDBSymbolTypeVTable;
+class PDBSymbolCustom;
+class PDBSymbolThunk;
+class PDBSymbolTypeCustom;
+class PDBSymbolTypeManaged;
+class PDBSymbolTypeDimension;
+class PDBSymbolUnknown;
+
+/// Specifies which PDB reader implementation is to be used.  Only a value
+/// of PDB_ReaderType::DIA is supported.
+enum class PDB_ReaderType {
+  DIA = 0,
+};
+
+/// Defines a 128-bit unique identifier.  This maps to a GUID on Windows, but
+/// is abstracted here for the purposes of non-Windows platforms that don't have
+/// the GUID structure defined.
+struct PDB_UniqueId {
+  uint64_t HighPart;
+  uint64_t LowPart;
+};
+
+/// An enumeration indicating the type of data contained in this table.
+enum class PDB_TableType {
+  Symbols,
+  SourceFiles,
+  LineNumbers,
+  SectionContribs,
+  Segments,
+  InjectedSources,
+  FrameData
+};
+
+/// Defines flags used for enumerating child symbols.  This corresponds to the
+/// NameSearchOptions enumeration which is documented here:
+/// https://msdn.microsoft.com/en-us/library/yat28ads.aspx
+enum PDB_NameSearchFlags {
+  NS_Default = 0x0,
+  NS_CaseSensitive = 0x1,
+  NS_CaseInsensitive = 0x2,
+  NS_FileNameExtMatch = 0x4,
+  NS_Regex = 0x8,
+  NS_UndecoratedName = 0x10
+};
+
+/// Specifies the hash algorithm that a source file from a PDB was hashed with.
+/// This corresponds to the CV_SourceChksum_t enumeration and are documented
+/// here: https://msdn.microsoft.com/en-us/library/e96az21x.aspx
+enum class PDB_Checksum { None = 0, MD5 = 1, SHA1 = 2 };
+
+/// These values correspond to the CV_CPU_TYPE_e enumeration, and are documented
+/// here: https://msdn.microsoft.com/en-us/library/b2fc64ek.aspx
+enum class PDB_Cpu {
+  Intel8080 = 0x0,
+  Intel8086 = 0x1,
+  Intel80286 = 0x2,
+  Intel80386 = 0x3,
+  Intel80486 = 0x4,
+  Pentium = 0x5,
+  PentiumPro = 0x6,
+  Pentium3 = 0x7,
+  MIPS = 0x10,
+  MIPS16 = 0x11,
+  MIPS32 = 0x12,
+  MIPS64 = 0x13,
+  MIPSI = 0x14,
+  MIPSII = 0x15,
+  MIPSIII = 0x16,
+  MIPSIV = 0x17,
+  MIPSV = 0x18,
+  M68000 = 0x20,
+  M68010 = 0x21,
+  M68020 = 0x22,
+  M68030 = 0x23,
+  M68040 = 0x24,
+  Alpha = 0x30,
+  Alpha21164 = 0x31,
+  Alpha21164A = 0x32,
+  Alpha21264 = 0x33,
+  Alpha21364 = 0x34,
+  PPC601 = 0x40,
+  PPC603 = 0x41,
+  PPC604 = 0x42,
+  PPC620 = 0x43,
+  PPCFP = 0x44,
+  PPCBE = 0x45,
+  SH3 = 0x50,
+  SH3E = 0x51,
+  SH3DSP = 0x52,
+  SH4 = 0x53,
+  SHMedia = 0x54,
+  ARM3 = 0x60,
+  ARM4 = 0x61,
+  ARM4T = 0x62,
+  ARM5 = 0x63,
+  ARM5T = 0x64,
+  ARM6 = 0x65,
+  ARM_XMAC = 0x66,
+  ARM_WMMX = 0x67,
+  ARM7 = 0x68,
+  Omni = 0x70,
+  Ia64 = 0x80,
+  Ia64_2 = 0x81,
+  CEE = 0x90,
+  AM33 = 0xa0,
+  M32R = 0xb0,
+  TriCore = 0xc0,
+  X64 = 0xd0,
+  EBC = 0xe0,
+  Thumb = 0xf0,
+  ARMNT = 0xf4,
+  D3D11_Shader = 0x100,
+};
+
+enum class PDB_Machine {
+  Invalid = 0xffff,
+  Unknown = 0x0,
+  Am33 = 0x13,
+  Amd64 = 0x8664,
+  Arm = 0x1C0,
+  ArmNT = 0x1C4,
+  Ebc = 0xEBC,
+  x86 = 0x14C,
+  Ia64 = 0x200,
+  M32R = 0x9041,
+  Mips16 = 0x266,
+  MipsFpu = 0x366,
+  MipsFpu16 = 0x466,
+  PowerPC = 0x1F0,
+  PowerPCFP = 0x1F1,
+  R4000 = 0x166,
+  SH3 = 0x1A2,
+  SH3DSP = 0x1A3,
+  SH4 = 0x1A6,
+  SH5 = 0x1A8,
+  Thumb = 0x1C2,
+  WceMipsV2 = 0x169
+};
+
+/// These values correspond to the CV_call_e enumeration, and are documented
+/// at the following locations:
+///   https://msdn.microsoft.com/en-us/library/b2fc64ek.aspx
+///   https://msdn.microsoft.com/en-us/library/windows/desktop/ms680207(v=vs.85).aspx
+///
+enum class PDB_CallingConv {
+  NearCdecl = 0x00,
+  FarCdecl = 0x01,
+  NearPascal = 0x02,
+  FarPascal = 0x03,
+  NearFastcall = 0x04,
+  FarFastcall = 0x05,
+  Skipped = 0x06,
+  NearStdcall = 0x07,
+  FarStdcall = 0x08,
+  NearSyscall = 0x09,
+  FarSyscall = 0x0a,
+  Thiscall = 0x0b,
+  MipsCall = 0x0c,
+  Generic = 0x0d,
+  Alphacall = 0x0e,
+  Ppccall = 0x0f,
+  SuperHCall = 0x10,
+  Armcall = 0x11,
+  AM33call = 0x12,
+  Tricall = 0x13,
+  Sh5call = 0x14,
+  M32R = 0x15,
+  Clrcall = 0x16,
+  Inline = 0x17,
+  NearVectorcall = 0x18,
+  Reserved = 0x19,
+};
+
+/// These values correspond to the CV_CFL_LANG enumeration, and are documented
+/// here: https://msdn.microsoft.com/en-us/library/bw3aekw6.aspx
+enum class PDB_Lang {
+  C = 0x00,
+  Cpp = 0x01,
+  Fortran = 0x02,
+  Masm = 0x03,
+  Pascal = 0x04,
+  Basic = 0x05,
+  Cobol = 0x06,
+  Link = 0x07,
+  Cvtres = 0x08,
+  Cvtpgd = 0x09,
+  CSharp = 0x0a,
+  VB = 0x0b,
+  ILAsm = 0x0c,
+  Java = 0x0d,
+  JScript = 0x0e,
+  MSIL = 0x0f,
+  HLSL = 0x10
+};
+
+/// These values correspond to the DataKind enumeration, and are documented
+/// here: https://msdn.microsoft.com/en-us/library/b2x2t313.aspx
+enum class PDB_DataKind {
+  Unknown,
+  Local,
+  StaticLocal,
+  Param,
+  ObjectPtr,
+  FileStatic,
+  Global,
+  Member,
+  StaticMember,
+  Constant
+};
+
+/// These values correspond to the SymTagEnum enumeration, and are documented
+/// here: https://msdn.microsoft.com/en-us/library/bkedss5f.aspx
+enum class PDB_SymType {
+  None,
+  Exe,
+  Compiland,
+  CompilandDetails,
+  CompilandEnv,
+  Function,
+  Block,
+  Data,
+  Annotation,
+  Label,
+  PublicSymbol,
+  UDT,
+  Enum,
+  FunctionSig,
+  PointerType,
+  ArrayType,
+  BuiltinType,
+  Typedef,
+  BaseClass,
+  Friend,
+  FunctionArg,
+  FuncDebugStart,
+  FuncDebugEnd,
+  UsingNamespace,
+  VTableShape,
+  VTable,
+  Custom,
+  Thunk,
+  CustomType,
+  ManagedType,
+  Dimension,
+  Max
+};
+
+/// These values correspond to the LocationType enumeration, and are documented
+/// here: https://msdn.microsoft.com/en-us/library/f57kaez3.aspx
+enum class PDB_LocType {
+  Null,
+  Static,
+  TLS,
+  RegRel,
+  ThisRel,
+  Enregistered,
+  BitField,
+  Slot,
+  IlRel,
+  MetaData,
+  Constant,
+  Max
+};
+
+/// These values correspond to the THUNK_ORDINAL enumeration, and are documented
+/// here: https://msdn.microsoft.com/en-us/library/dh0k8hft.aspx
+enum class PDB_ThunkOrdinal {
+  Standard,
+  ThisAdjustor,
+  Vcall,
+  Pcode,
+  UnknownLoad,
+  TrampIncremental,
+  BranchIsland
+};
+
+/// These values correspond to the UdtKind enumeration, and are documented
+/// here: https://msdn.microsoft.com/en-us/library/wcstk66t.aspx
+enum class PDB_UdtType { Struct, Class, Union, Interface };
+
+/// These values correspond to the StackFrameTypeEnum enumeration, and are
+/// documented here: https://msdn.microsoft.com/en-us/library/bc5207xw.aspx.
+enum class PDB_StackFrameType { FPO, KernelTrap, KernelTSS, EBP, FrameData };
+
+/// These values correspond to the StackFrameTypeEnum enumeration, and are
+/// documented here: https://msdn.microsoft.com/en-us/library/bc5207xw.aspx.
+enum class PDB_MemoryType { Code, Data, Stack, HeapCode };
+
+/// These values correspond to the Basictype enumeration, and are documented
+/// here: https://msdn.microsoft.com/en-us/library/4szdtzc3.aspx
+enum class PDB_BuiltinType {
+  None = 0,
+  Void = 1,
+  Char = 2,
+  WCharT = 3,
+  Int = 6,
+  UInt = 7,
+  Float = 8,
+  BCD = 9,
+  Bool = 10,
+  Long = 13,
+  ULong = 14,
+  Currency = 25,
+  Date = 26,
+  Variant = 27,
+  Complex = 28,
+  Bitfield = 29,
+  BSTR = 30,
+  HResult = 31
+};
+
+enum class PDB_RegisterId {
+  Unknown = 0,
+  VFrame = 30006,
+  AL = 1,
+  CL = 2,
+  DL = 3,
+  BL = 4,
+  AH = 5,
+  CH = 6,
+  DH = 7,
+  BH = 8,
+  AX = 9,
+  CX = 10,
+  DX = 11,
+  BX = 12,
+  SP = 13,
+  BP = 14,
+  SI = 15,
+  DI = 16,
+  EAX = 17,
+  ECX = 18,
+  EDX = 19,
+  EBX = 20,
+  ESP = 21,
+  EBP = 22,
+  ESI = 23,
+  EDI = 24,
+  ES = 25,
+  CS = 26,
+  SS = 27,
+  DS = 28,
+  FS = 29,
+  GS = 30,
+  IP = 31,
+  RAX = 328,
+  RBX = 329,
+  RCX = 330,
+  RDX = 331,
+  RSI = 332,
+  RDI = 333,
+  RBP = 334,
+  RSP = 335,
+  R8 = 336,
+  R9 = 337,
+  R10 = 338,
+  R11 = 339,
+  R12 = 340,
+  R13 = 341,
+  R14 = 342,
+  R15 = 343,
+};
+
+enum class PDB_MemberAccess { Private = 1, Protected = 2, Public = 3 };
+
+struct VersionInfo {
+  uint32_t Major;
+  uint32_t Minor;
+  uint32_t Build;
+  uint32_t QFE;
+};
+
+enum PDB_VariantType {
+  Empty,
+  Unknown,
+  Int8,
+  Int16,
+  Int32,
+  Int64,
+  Single,
+  Double,
+  UInt8,
+  UInt16,
+  UInt32,
+  UInt64,
+  Bool,
+};
+
+struct Variant {
+  Variant()
+    : Type(PDB_VariantType::Empty) {
+  }
+
+  PDB_VariantType Type;
+  union {
+    bool Bool;
+    int8_t Int8;
+    int16_t Int16;
+    int32_t Int32;
+    int64_t Int64;
+    float Single;
+    double Double;
+    uint8_t UInt8;
+    uint16_t UInt16;
+    uint32_t UInt32;
+    uint64_t UInt64;
+    void* Pointer;
+  };
+};
+
+} // namespace llvm
+
+namespace std {
+template <> struct hash<llvm::PDB_SymType> {
+  typedef llvm::PDB_SymType argument_type;
+  typedef std::size_t result_type;
+
+  result_type operator()(const argument_type &Arg) const {
+    return std::hash<int>()(static_cast<int>(Arg));
+  }
+};
+}
+
+#endif