vendor/llvm/llvm-trunk-r351319

14 files changed, 541 insertions, 281 deletions

diff --git a/include/llvm/DebugInfo/CodeView/CVRecord.h b/include/llvm/DebugInfo/CodeView/CVRecord.h
index 9dbeb438f4ae..11ca9ff108de 100644
--- a/include/llvm/DebugInfo/CodeView/CVRecord.h
+++ b/include/llvm/DebugInfo/CodeView/CVRecord.h
@@ -45,13 +45,8 @@ public:
     return RecordData.drop_front(sizeof(RecordPrefix));
   }
 
-  Optional<uint32_t> hash() const { return Hash; }
-
-  void setHash(uint32_t Value) { Hash = Value; }
-
   Kind Type;
   ArrayRef<uint8_t> RecordData;
-  Optional<uint32_t> Hash;
 };
 
 template <typename Kind> struct RemappedRecord {
diff --git a/include/llvm/DebugInfo/CodeView/CodeView.h b/include/llvm/DebugInfo/CodeView/CodeView.h
index 4ce9f68cffd9..8e0d9f608e93 100644
--- a/include/llvm/DebugInfo/CodeView/CodeView.h
+++ b/include/llvm/DebugInfo/CodeView/CodeView.h
@@ -231,6 +231,8 @@ enum class FrameProcedureOptions : uint32_t {
   Inlined = 0x00000800,
   StrictSecurityChecks = 0x00001000,
   SafeBuffers = 0x00002000,
+  EncodedLocalBasePointerMask = 0x0000C000,
+  EncodedParamBasePointerMask = 0x00030000,
   ProfileGuidedOptimization = 0x00040000,
   ValidProfileCounts = 0x00080000,
   OptimizedForSpeed = 0x00100000,
@@ -356,7 +358,9 @@ enum class PointerOptions : uint32_t {
   Const = 0x00000400,
   Unaligned = 0x00000800,
   Restrict = 0x00001000,
-  WinRTSmartPointer = 0x00080000
+  WinRTSmartPointer = 0x00080000,
+  LValueRefThisPointer = 0x00100000,
+  RValueRefThisPointer = 0x00200000
 };
 CV_DEFINE_ENUM_CLASS_FLAGS_OPERATORS(PointerOptions)
 
@@ -510,6 +514,19 @@ enum class RegisterId : uint16_t {
 #undef CV_REGISTER
 };
 
+/// Two-bit value indicating which register is the designated frame pointer
+/// register. Appears in the S_FRAMEPROC record flags.
+enum class EncodedFramePtrReg : uint8_t {
+  None = 0,
+  StackPtr = 1,
+  FramePtr = 2,
+  BasePtr = 3,
+};
+
+RegisterId decodeFramePtrReg(EncodedFramePtrReg EncodedReg, CPUType CPU);
+
+EncodedFramePtrReg encodeFramePtrReg(RegisterId Reg, CPUType CPU);
+
 /// These values correspond to the THUNK_ORDINAL enumeration.
 enum class ThunkOrdinal : uint8_t {
   Standard,
diff --git a/include/llvm/DebugInfo/CodeView/CodeViewError.h b/include/llvm/DebugInfo/CodeView/CodeViewError.h
index 586a720ce6e4..d4615d02220d 100644
--- a/include/llvm/DebugInfo/CodeView/CodeViewError.h
+++ b/include/llvm/DebugInfo/CodeView/CodeViewError.h
@@ -24,23 +24,32 @@ enum class cv_error_code {
   no_records,
   unknown_member_record,
 };
+} // namespace codeview
+} // namespace llvm
+
+namespace std {
+template <>
+struct is_error_code_enum<llvm::codeview::cv_error_code> : std::true_type {};
+} // namespace std
+
+namespace llvm {
+namespace codeview {
+const std::error_category &CVErrorCategory();
+
+inline std::error_code make_error_code(cv_error_code E) {
+  return std::error_code(static_cast<int>(E), CVErrorCategory());
+}
 
 /// Base class for errors originating when parsing raw PDB files
-class CodeViewError : public ErrorInfo<CodeViewError> {
+class CodeViewError : public ErrorInfo<CodeViewError, StringError> {
 public:
+  using ErrorInfo<CodeViewError,
+                  StringError>::ErrorInfo; // inherit constructors
+  CodeViewError(const Twine &S) : ErrorInfo(S, cv_error_code::unspecified) {}
   static char ID;
-  CodeViewError(cv_error_code C);
-  CodeViewError(const std::string &Context);
-  CodeViewError(cv_error_code C, const std::string &Context);
+};
 
-  void log(raw_ostream &OS) const override;
-  const std::string &getErrorMessage() const;
-  std::error_code convertToErrorCode() const override;
+} // namespace codeview
+} // namespace llvm
 
-private:
-  std::string ErrMsg;
-  cv_error_code Code;
-};
-}
-}
 #endif
diff --git a/include/llvm/DebugInfo/CodeView/CodeViewRegisters.def b/include/llvm/DebugInfo/CodeView/CodeViewRegisters.def
index 6da8893bd61a..fdfcf4d53a23 100644
--- a/include/llvm/DebugInfo/CodeView/CodeViewRegisters.def
+++ b/include/llvm/DebugInfo/CodeView/CodeViewRegisters.def
@@ -18,251 +18,342 @@
 // This currently only contains the "register subset shared by all processor
 // types" (ERR etc.) and the x86 registers.
 
-CV_REGISTER(CVRegERR, 30000)
-CV_REGISTER(CVRegTEB, 30001)
-CV_REGISTER(CVRegTIMER, 30002)
-CV_REGISTER(CVRegEFAD1, 30003)
-CV_REGISTER(CVRegEFAD2, 30004)
-CV_REGISTER(CVRegEFAD3, 30005)
-CV_REGISTER(CVRegVFRAME, 30006)
-CV_REGISTER(CVRegHANDLE, 30007)
-CV_REGISTER(CVRegPARAMS, 30008)
-CV_REGISTER(CVRegLOCALS, 30009)
-CV_REGISTER(CVRegTID, 30010)
-CV_REGISTER(CVRegENV, 30011)
-CV_REGISTER(CVRegCMDLN, 30012)
+// Some system headers define macros that conflict with our enums. Every
+// compiler supported by LLVM has the push_macro and pop_macro pragmas, so use
+// them to avoid the conflict.
+#pragma push_macro("CR0")
+#pragma push_macro("CR1")
+#pragma push_macro("CR2")
+#pragma push_macro("CR3")
+#pragma push_macro("CR4")
 
-CV_REGISTER(CVRegNONE, 0)
-CV_REGISTER(CVRegAL, 1)
-CV_REGISTER(CVRegCL, 2)
-CV_REGISTER(CVRegDL, 3)
-CV_REGISTER(CVRegBL, 4)
-CV_REGISTER(CVRegAH, 5)
-CV_REGISTER(CVRegCH, 6)
-CV_REGISTER(CVRegDH, 7)
-CV_REGISTER(CVRegBH, 8)
-CV_REGISTER(CVRegAX, 9)
-CV_REGISTER(CVRegCX, 10)
-CV_REGISTER(CVRegDX, 11)
-CV_REGISTER(CVRegBX, 12)
-CV_REGISTER(CVRegSP, 13)
-CV_REGISTER(CVRegBP, 14)
-CV_REGISTER(CVRegSI, 15)
-CV_REGISTER(CVRegDI, 16)
-CV_REGISTER(CVRegEAX, 17)
-CV_REGISTER(CVRegECX, 18)
-CV_REGISTER(CVRegEDX, 19)
-CV_REGISTER(CVRegEBX, 20)
-CV_REGISTER(CVRegESP, 21)
-CV_REGISTER(CVRegEBP, 22)
-CV_REGISTER(CVRegESI, 23)
-CV_REGISTER(CVRegEDI, 24)
-CV_REGISTER(CVRegES, 25)
-CV_REGISTER(CVRegCS, 26)
-CV_REGISTER(CVRegSS, 27)
-CV_REGISTER(CVRegDS, 28)
-CV_REGISTER(CVRegFS, 29)
-CV_REGISTER(CVRegGS, 30)
-CV_REGISTER(CVRegIP, 31)
-CV_REGISTER(CVRegFLAGS, 32)
-CV_REGISTER(CVRegEIP, 33)
-CV_REGISTER(CVRegEFLAGS, 34)
-CV_REGISTER(CVRegTEMP, 40)
-CV_REGISTER(CVRegTEMPH, 41)
-CV_REGISTER(CVRegQUOTE, 42)
-CV_REGISTER(CVRegPCDR3, 43)
-CV_REGISTER(CVRegPCDR4, 44)
-CV_REGISTER(CVRegPCDR5, 45)
-CV_REGISTER(CVRegPCDR6, 46)
-CV_REGISTER(CVRegPCDR7, 47)
-CV_REGISTER(CVRegCR0, 80)
-CV_REGISTER(CVRegCR1, 81)
-CV_REGISTER(CVRegCR2, 82)
-CV_REGISTER(CVRegCR3, 83)
-CV_REGISTER(CVRegCR4, 84)
-CV_REGISTER(CVRegDR0, 90)
-CV_REGISTER(CVRegDR1, 91)
-CV_REGISTER(CVRegDR2, 92)
-CV_REGISTER(CVRegDR3, 93)
-CV_REGISTER(CVRegDR4, 94)
-CV_REGISTER(CVRegDR5, 95)
-CV_REGISTER(CVRegDR6, 96)
-CV_REGISTER(CVRegDR7, 97)
-CV_REGISTER(CVRegGDTR, 110)
-CV_REGISTER(CVRegGDTL, 111)
-CV_REGISTER(CVRegIDTR, 112)
-CV_REGISTER(CVRegIDTL, 113)
-CV_REGISTER(CVRegLDTR, 114)
-CV_REGISTER(CVRegTR, 115)
+CV_REGISTER(ERR, 30000)
+CV_REGISTER(TEB, 30001)
+CV_REGISTER(TIMER, 30002)
+CV_REGISTER(EFAD1, 30003)
+CV_REGISTER(EFAD2, 30004)
+CV_REGISTER(EFAD3, 30005)
+CV_REGISTER(VFRAME, 30006)
+CV_REGISTER(HANDLE, 30007)
+CV_REGISTER(PARAMS, 30008)
+CV_REGISTER(LOCALS, 30009)
+CV_REGISTER(TID, 30010)
+CV_REGISTER(ENV, 30011)
+CV_REGISTER(CMDLN, 30012)
 
-CV_REGISTER(CVRegPSEUDO1, 116)
-CV_REGISTER(CVRegPSEUDO2, 117)
-CV_REGISTER(CVRegPSEUDO3, 118)
-CV_REGISTER(CVRegPSEUDO4, 119)
-CV_REGISTER(CVRegPSEUDO5, 120)
-CV_REGISTER(CVRegPSEUDO6, 121)
-CV_REGISTER(CVRegPSEUDO7, 122)
-CV_REGISTER(CVRegPSEUDO8, 123)
-CV_REGISTER(CVRegPSEUDO9, 124)
+CV_REGISTER(NONE, 0)
+CV_REGISTER(AL, 1)
+CV_REGISTER(CL, 2)
+CV_REGISTER(DL, 3)
+CV_REGISTER(BL, 4)
+CV_REGISTER(AH, 5)
+CV_REGISTER(CH, 6)
+CV_REGISTER(DH, 7)
+CV_REGISTER(BH, 8)
+CV_REGISTER(AX, 9)
+CV_REGISTER(CX, 10)
+CV_REGISTER(DX, 11)
+CV_REGISTER(BX, 12)
+CV_REGISTER(SP, 13)
+CV_REGISTER(BP, 14)
+CV_REGISTER(SI, 15)
+CV_REGISTER(DI, 16)
+CV_REGISTER(EAX, 17)
+CV_REGISTER(ECX, 18)
+CV_REGISTER(EDX, 19)
+CV_REGISTER(EBX, 20)
+CV_REGISTER(ESP, 21)
+CV_REGISTER(EBP, 22)
+CV_REGISTER(ESI, 23)
+CV_REGISTER(EDI, 24)
+CV_REGISTER(ES, 25)
+CV_REGISTER(CS, 26)
+CV_REGISTER(SS, 27)
+CV_REGISTER(DS, 28)
+CV_REGISTER(FS, 29)
+CV_REGISTER(GS, 30)
+CV_REGISTER(IP, 31)
+CV_REGISTER(FLAGS, 32)
+CV_REGISTER(EIP, 33)
+CV_REGISTER(EFLAGS, 34)
+CV_REGISTER(TEMP, 40)
+CV_REGISTER(TEMPH, 41)
+CV_REGISTER(QUOTE, 42)
+CV_REGISTER(PCDR3, 43)
+CV_REGISTER(PCDR4, 44)
+CV_REGISTER(PCDR5, 45)
+CV_REGISTER(PCDR6, 46)
+CV_REGISTER(PCDR7, 47)
+CV_REGISTER(CR0, 80)
+CV_REGISTER(CR1, 81)
+CV_REGISTER(CR2, 82)
+CV_REGISTER(CR3, 83)
+CV_REGISTER(CR4, 84)
+CV_REGISTER(DR0, 90)
+CV_REGISTER(DR1, 91)
+CV_REGISTER(DR2, 92)
+CV_REGISTER(DR3, 93)
+CV_REGISTER(DR4, 94)
+CV_REGISTER(DR5, 95)
+CV_REGISTER(DR6, 96)
+CV_REGISTER(DR7, 97)
+CV_REGISTER(GDTR, 110)
+CV_REGISTER(GDTL, 111)
+CV_REGISTER(IDTR, 112)
+CV_REGISTER(IDTL, 113)
+CV_REGISTER(LDTR, 114)
+CV_REGISTER(TR, 115)
 
-CV_REGISTER(CVRegST0, 128)
-CV_REGISTER(CVRegST1, 129)
-CV_REGISTER(CVRegST2, 130)
-CV_REGISTER(CVRegST3, 131)
-CV_REGISTER(CVRegST4, 132)
-CV_REGISTER(CVRegST5, 133)
-CV_REGISTER(CVRegST6, 134)
-CV_REGISTER(CVRegST7, 135)
-CV_REGISTER(CVRegCTRL, 136)
-CV_REGISTER(CVRegSTAT, 137)
-CV_REGISTER(CVRegTAG, 138)
-CV_REGISTER(CVRegFPIP, 139)
-CV_REGISTER(CVRegFPCS, 140)
-CV_REGISTER(CVRegFPDO, 141)
-CV_REGISTER(CVRegFPDS, 142)
-CV_REGISTER(CVRegISEM, 143)
-CV_REGISTER(CVRegFPEIP, 144)
-CV_REGISTER(CVRegFPEDO, 145)
+CV_REGISTER(PSEUDO1, 116)
+CV_REGISTER(PSEUDO2, 117)
+CV_REGISTER(PSEUDO3, 118)
+CV_REGISTER(PSEUDO4, 119)
+CV_REGISTER(PSEUDO5, 120)
+CV_REGISTER(PSEUDO6, 121)
+CV_REGISTER(PSEUDO7, 122)
+CV_REGISTER(PSEUDO8, 123)
+CV_REGISTER(PSEUDO9, 124)
 
-CV_REGISTER(CVRegMM0, 146)
-CV_REGISTER(CVRegMM1, 147)
-CV_REGISTER(CVRegMM2, 148)
-CV_REGISTER(CVRegMM3, 149)
-CV_REGISTER(CVRegMM4, 150)
-CV_REGISTER(CVRegMM5, 151)
-CV_REGISTER(CVRegMM6, 152)
-CV_REGISTER(CVRegMM7, 153)
+CV_REGISTER(ST0, 128)
+CV_REGISTER(ST1, 129)
+CV_REGISTER(ST2, 130)
+CV_REGISTER(ST3, 131)
+CV_REGISTER(ST4, 132)
+CV_REGISTER(ST5, 133)
+CV_REGISTER(ST6, 134)
+CV_REGISTER(ST7, 135)
+CV_REGISTER(CTRL, 136)
+CV_REGISTER(STAT, 137)
+CV_REGISTER(TAG, 138)
+CV_REGISTER(FPIP, 139)
+CV_REGISTER(FPCS, 140)
+CV_REGISTER(FPDO, 141)
+CV_REGISTER(FPDS, 142)
+CV_REGISTER(ISEM, 143)
+CV_REGISTER(FPEIP, 144)
+CV_REGISTER(FPEDO, 145)
 
-CV_REGISTER(CVRegXMM0, 154)
-CV_REGISTER(CVRegXMM1, 155)
-CV_REGISTER(CVRegXMM2, 156)
-CV_REGISTER(CVRegXMM3, 157)
-CV_REGISTER(CVRegXMM4, 158)
-CV_REGISTER(CVRegXMM5, 159)
-CV_REGISTER(CVRegXMM6, 160)
-CV_REGISTER(CVRegXMM7, 161)
+CV_REGISTER(MM0, 146)
+CV_REGISTER(MM1, 147)
+CV_REGISTER(MM2, 148)
+CV_REGISTER(MM3, 149)
+CV_REGISTER(MM4, 150)
+CV_REGISTER(MM5, 151)
+CV_REGISTER(MM6, 152)
+CV_REGISTER(MM7, 153)
 
-CV_REGISTER(CVRegMXCSR, 211)
+CV_REGISTER(XMM0, 154)
+CV_REGISTER(XMM1, 155)
+CV_REGISTER(XMM2, 156)
+CV_REGISTER(XMM3, 157)
+CV_REGISTER(XMM4, 158)
+CV_REGISTER(XMM5, 159)
+CV_REGISTER(XMM6, 160)
+CV_REGISTER(XMM7, 161)
 
-CV_REGISTER(CVRegEDXEAX, 212)
+CV_REGISTER(MXCSR, 211)
 
-CV_REGISTER(CVRegEMM0L, 220)
-CV_REGISTER(CVRegEMM1L, 221)
-CV_REGISTER(CVRegEMM2L, 222)
-CV_REGISTER(CVRegEMM3L, 223)
-CV_REGISTER(CVRegEMM4L, 224)
-CV_REGISTER(CVRegEMM5L, 225)
-CV_REGISTER(CVRegEMM6L, 226)
-CV_REGISTER(CVRegEMM7L, 227)
+CV_REGISTER(EDXEAX, 212)
 
-CV_REGISTER(CVRegEMM0H, 228)
-CV_REGISTER(CVRegEMM1H, 229)
-CV_REGISTER(CVRegEMM2H, 230)
-CV_REGISTER(CVRegEMM3H, 231)
-CV_REGISTER(CVRegEMM4H, 232)
-CV_REGISTER(CVRegEMM5H, 233)
-CV_REGISTER(CVRegEMM6H, 234)
-CV_REGISTER(CVRegEMM7H, 235)
+CV_REGISTER(EMM0L, 220)
+CV_REGISTER(EMM1L, 221)
+CV_REGISTER(EMM2L, 222)
+CV_REGISTER(EMM3L, 223)
+CV_REGISTER(EMM4L, 224)
+CV_REGISTER(EMM5L, 225)
+CV_REGISTER(EMM6L, 226)
+CV_REGISTER(EMM7L, 227)
 
-CV_REGISTER(CVRegMM00, 236)
-CV_REGISTER(CVRegMM01, 237)
-CV_REGISTER(CVRegMM10, 238)
-CV_REGISTER(CVRegMM11, 239)
-CV_REGISTER(CVRegMM20, 240)
-CV_REGISTER(CVRegMM21, 241)
-CV_REGISTER(CVRegMM30, 242)
-CV_REGISTER(CVRegMM31, 243)
-CV_REGISTER(CVRegMM40, 244)
-CV_REGISTER(CVRegMM41, 245)
-CV_REGISTER(CVRegMM50, 246)
-CV_REGISTER(CVRegMM51, 247)
-CV_REGISTER(CVRegMM60, 248)
-CV_REGISTER(CVRegMM61, 249)
-CV_REGISTER(CVRegMM70, 250)
-CV_REGISTER(CVRegMM71, 251)
+CV_REGISTER(EMM0H, 228)
+CV_REGISTER(EMM1H, 229)
+CV_REGISTER(EMM2H, 230)
+CV_REGISTER(EMM3H, 231)
+CV_REGISTER(EMM4H, 232)
+CV_REGISTER(EMM5H, 233)
+CV_REGISTER(EMM6H, 234)
+CV_REGISTER(EMM7H, 235)
 
-CV_REGISTER(CVRegBND0, 396)
-CV_REGISTER(CVRegBND1, 397)
-CV_REGISTER(CVRegBND2, 398)
+CV_REGISTER(MM00, 236)
+CV_REGISTER(MM01, 237)
+CV_REGISTER(MM10, 238)
+CV_REGISTER(MM11, 239)
+CV_REGISTER(MM20, 240)
+CV_REGISTER(MM21, 241)
+CV_REGISTER(MM30, 242)
+CV_REGISTER(MM31, 243)
+CV_REGISTER(MM40, 244)
+CV_REGISTER(MM41, 245)
+CV_REGISTER(MM50, 246)
+CV_REGISTER(MM51, 247)
+CV_REGISTER(MM60, 248)
+CV_REGISTER(MM61, 249)
+CV_REGISTER(MM70, 250)
+CV_REGISTER(MM71, 251)
 
+CV_REGISTER(BND0, 396)
+CV_REGISTER(BND1, 397)
+CV_REGISTER(BND2, 398)
 
-CV_REGISTER(CVRegXMM8, 252)
-CV_REGISTER(CVRegXMM9, 253)
-CV_REGISTER(CVRegXMM10, 254)
-CV_REGISTER(CVRegXMM11, 255)
-CV_REGISTER(CVRegXMM12, 256)
-CV_REGISTER(CVRegXMM13, 257)
-CV_REGISTER(CVRegXMM14, 258)
-CV_REGISTER(CVRegXMM15, 259)
 
+CV_REGISTER(XMM8, 252)
+CV_REGISTER(XMM9, 253)
+CV_REGISTER(XMM10, 254)
+CV_REGISTER(XMM11, 255)
+CV_REGISTER(XMM12, 256)
+CV_REGISTER(XMM13, 257)
+CV_REGISTER(XMM14, 258)
+CV_REGISTER(XMM15, 259)
 
-CV_REGISTER(CVRegSIL, 324)
-CV_REGISTER(CVRegDIL, 325)
-CV_REGISTER(CVRegBPL, 326)
-CV_REGISTER(CVRegSPL, 327)
 
-CV_REGISTER(CVRegRAX, 328)
-CV_REGISTER(CVRegRBX, 329)
-CV_REGISTER(CVRegRCX, 330)
-CV_REGISTER(CVRegRDX, 331)
-CV_REGISTER(CVRegRSI, 332)
-CV_REGISTER(CVRegRDI, 333)
-CV_REGISTER(CVRegRBP, 334)
-CV_REGISTER(CVRegRSP, 335)
+CV_REGISTER(SIL, 324)
+CV_REGISTER(DIL, 325)
+CV_REGISTER(BPL, 326)
+CV_REGISTER(SPL, 327)
 
-CV_REGISTER(CVRegR8, 336)
-CV_REGISTER(CVRegR9, 337)
-CV_REGISTER(CVRegR10, 338)
-CV_REGISTER(CVRegR11, 339)
-CV_REGISTER(CVRegR12, 340)
-CV_REGISTER(CVRegR13, 341)
-CV_REGISTER(CVRegR14, 342)
-CV_REGISTER(CVRegR15, 343)
+CV_REGISTER(RAX, 328)
+CV_REGISTER(RBX, 329)
+CV_REGISTER(RCX, 330)
+CV_REGISTER(RDX, 331)
+CV_REGISTER(RSI, 332)
+CV_REGISTER(RDI, 333)
+CV_REGISTER(RBP, 334)
+CV_REGISTER(RSP, 335)
 
-CV_REGISTER(CVRegR8B, 344)
-CV_REGISTER(CVRegR9B, 345)
-CV_REGISTER(CVRegR10B, 346)
-CV_REGISTER(CVRegR11B, 347)
-CV_REGISTER(CVRegR12B, 348)
-CV_REGISTER(CVRegR13B, 349)
-CV_REGISTER(CVRegR14B, 350)
-CV_REGISTER(CVRegR15B, 351)
+CV_REGISTER(R8, 336)
+CV_REGISTER(R9, 337)
+CV_REGISTER(R10, 338)
+CV_REGISTER(R11, 339)
+CV_REGISTER(R12, 340)
+CV_REGISTER(R13, 341)
+CV_REGISTER(R14, 342)
+CV_REGISTER(R15, 343)
 
-CV_REGISTER(CVRegR8W, 352)
-CV_REGISTER(CVRegR9W, 353)
-CV_REGISTER(CVRegR10W, 354)
-CV_REGISTER(CVRegR11W, 355)
-CV_REGISTER(CVRegR12W, 356)
-CV_REGISTER(CVRegR13W, 357)
-CV_REGISTER(CVRegR14W, 358)
-CV_REGISTER(CVRegR15W, 359)
+CV_REGISTER(R8B, 344)
+CV_REGISTER(R9B, 345)
+CV_REGISTER(R10B, 346)
+CV_REGISTER(R11B, 347)
+CV_REGISTER(R12B, 348)
+CV_REGISTER(R13B, 349)
+CV_REGISTER(R14B, 350)
+CV_REGISTER(R15B, 351)
 
-CV_REGISTER(CVRegR8D, 360)
-CV_REGISTER(CVRegR9D, 361)
-CV_REGISTER(CVRegR10D, 362)
-CV_REGISTER(CVRegR11D, 363)
-CV_REGISTER(CVRegR12D, 364)
-CV_REGISTER(CVRegR13D, 365)
-CV_REGISTER(CVRegR14D, 366)
-CV_REGISTER(CVRegR15D, 367)
+CV_REGISTER(R8W, 352)
+CV_REGISTER(R9W, 353)
+CV_REGISTER(R10W, 354)
+CV_REGISTER(R11W, 355)
+CV_REGISTER(R12W, 356)
+CV_REGISTER(R13W, 357)
+CV_REGISTER(R14W, 358)
+CV_REGISTER(R15W, 359)
+
+CV_REGISTER(R8D, 360)
+CV_REGISTER(R9D, 361)
+CV_REGISTER(R10D, 362)
+CV_REGISTER(R11D, 363)
+CV_REGISTER(R12D, 364)
+CV_REGISTER(R13D, 365)
+CV_REGISTER(R14D, 366)
+CV_REGISTER(R15D, 367)
 
 
 // cvconst.h defines both CV_REG_YMM0 (252) and CV_AMD64_YMM0 (368). Keep the
 // original prefix to distinguish them.
 
-CV_REGISTER(CVRegAMD64_YMM0, 368)
-CV_REGISTER(CVRegAMD64_YMM1, 369)
-CV_REGISTER(CVRegAMD64_YMM2, 370)
-CV_REGISTER(CVRegAMD64_YMM3, 371)
-CV_REGISTER(CVRegAMD64_YMM4, 372)
-CV_REGISTER(CVRegAMD64_YMM5, 373)
-CV_REGISTER(CVRegAMD64_YMM6, 374)
-CV_REGISTER(CVRegAMD64_YMM7, 375)
-CV_REGISTER(CVRegAMD64_YMM8, 376)
-CV_REGISTER(CVRegAMD64_YMM9, 377)
-CV_REGISTER(CVRegAMD64_YMM10, 378)
-CV_REGISTER(CVRegAMD64_YMM11, 379)
-CV_REGISTER(CVRegAMD64_YMM12, 380)
-CV_REGISTER(CVRegAMD64_YMM13, 381)
-CV_REGISTER(CVRegAMD64_YMM14, 382)
-CV_REGISTER(CVRegAMD64_YMM15, 383)
+CV_REGISTER(AMD64_YMM0, 368)
+CV_REGISTER(AMD64_YMM1, 369)
+CV_REGISTER(AMD64_YMM2, 370)
+CV_REGISTER(AMD64_YMM3, 371)
+CV_REGISTER(AMD64_YMM4, 372)
+CV_REGISTER(AMD64_YMM5, 373)
+CV_REGISTER(AMD64_YMM6, 374)
+CV_REGISTER(AMD64_YMM7, 375)
+CV_REGISTER(AMD64_YMM8, 376)
+CV_REGISTER(AMD64_YMM9, 377)
+CV_REGISTER(AMD64_YMM10, 378)
+CV_REGISTER(AMD64_YMM11, 379)
+CV_REGISTER(AMD64_YMM12, 380)
+CV_REGISTER(AMD64_YMM13, 381)
+CV_REGISTER(AMD64_YMM14, 382)
+CV_REGISTER(AMD64_YMM15, 383)
+
+CV_REGISTER(AMD64_XMM16, 694)
+CV_REGISTER(AMD64_XMM17, 695)
+CV_REGISTER(AMD64_XMM18, 696)
+CV_REGISTER(AMD64_XMM19, 697)
+CV_REGISTER(AMD64_XMM20, 698)
+CV_REGISTER(AMD64_XMM21, 699)
+CV_REGISTER(AMD64_XMM22, 700)
+CV_REGISTER(AMD64_XMM23, 701)
+CV_REGISTER(AMD64_XMM24, 702)
+CV_REGISTER(AMD64_XMM25, 703)
+CV_REGISTER(AMD64_XMM26, 704)
+CV_REGISTER(AMD64_XMM27, 705)
+CV_REGISTER(AMD64_XMM28, 706)
+CV_REGISTER(AMD64_XMM29, 707)
+CV_REGISTER(AMD64_XMM30, 708)
+CV_REGISTER(AMD64_XMM31, 709)
+
+CV_REGISTER(AMD64_YMM16, 710)
+CV_REGISTER(AMD64_YMM17, 711)
+CV_REGISTER(AMD64_YMM18, 712)
+CV_REGISTER(AMD64_YMM19, 713)
+CV_REGISTER(AMD64_YMM20, 714)
+CV_REGISTER(AMD64_YMM21, 715)
+CV_REGISTER(AMD64_YMM22, 716)
+CV_REGISTER(AMD64_YMM23, 717)
+CV_REGISTER(AMD64_YMM24, 718)
+CV_REGISTER(AMD64_YMM25, 719)
+CV_REGISTER(AMD64_YMM26, 720)
+CV_REGISTER(AMD64_YMM27, 721)
+CV_REGISTER(AMD64_YMM28, 722)
+CV_REGISTER(AMD64_YMM29, 723)
+CV_REGISTER(AMD64_YMM30, 724)
+CV_REGISTER(AMD64_YMM31, 725)
+
+CV_REGISTER(AMD64_ZMM0, 726)
+CV_REGISTER(AMD64_ZMM1, 727)
+CV_REGISTER(AMD64_ZMM2, 728)
+CV_REGISTER(AMD64_ZMM3, 729)
+CV_REGISTER(AMD64_ZMM4, 730)
+CV_REGISTER(AMD64_ZMM5, 731)
+CV_REGISTER(AMD64_ZMM6, 732)
+CV_REGISTER(AMD64_ZMM7, 733)
+CV_REGISTER(AMD64_ZMM8, 734)
+CV_REGISTER(AMD64_ZMM9, 735)
+CV_REGISTER(AMD64_ZMM10, 736)
+CV_REGISTER(AMD64_ZMM11, 737)
+CV_REGISTER(AMD64_ZMM12, 738)
+CV_REGISTER(AMD64_ZMM13, 739)
+CV_REGISTER(AMD64_ZMM14, 740)
+CV_REGISTER(AMD64_ZMM15, 741)
+CV_REGISTER(AMD64_ZMM16, 742)
+CV_REGISTER(AMD64_ZMM17, 743)
+CV_REGISTER(AMD64_ZMM18, 744)
+CV_REGISTER(AMD64_ZMM19, 745)
+CV_REGISTER(AMD64_ZMM20, 746)
+CV_REGISTER(AMD64_ZMM21, 747)
+CV_REGISTER(AMD64_ZMM22, 748)
+CV_REGISTER(AMD64_ZMM23, 749)
+CV_REGISTER(AMD64_ZMM24, 750)
+CV_REGISTER(AMD64_ZMM25, 751)
+CV_REGISTER(AMD64_ZMM26, 752)
+CV_REGISTER(AMD64_ZMM27, 753)
+CV_REGISTER(AMD64_ZMM28, 754)
+CV_REGISTER(AMD64_ZMM29, 755)
+CV_REGISTER(AMD64_ZMM30, 756)
+CV_REGISTER(AMD64_ZMM31, 757)
+
+CV_REGISTER(AMD64_K0, 758)
+CV_REGISTER(AMD64_K1, 759)
+CV_REGISTER(AMD64_K2, 760)
+CV_REGISTER(AMD64_K3, 761)
+CV_REGISTER(AMD64_K4, 762)
+CV_REGISTER(AMD64_K5, 763)
+CV_REGISTER(AMD64_K6, 764)
+CV_REGISTER(AMD64_K7, 765)
+
+#pragma pop_macro("CR0")
+#pragma pop_macro("CR1")
+#pragma pop_macro("CR2")
+#pragma pop_macro("CR3")
+#pragma pop_macro("CR4")
diff --git a/include/llvm/DebugInfo/CodeView/DebugFrameDataSubsection.h b/include/llvm/DebugInfo/CodeView/DebugFrameDataSubsection.h
index 1e329c7c3f14..847d93f0e985 100644
--- a/include/llvm/DebugInfo/CodeView/DebugFrameDataSubsection.h
+++ b/include/llvm/DebugInfo/CodeView/DebugFrameDataSubsection.h
@@ -13,6 +13,7 @@
 #include "llvm/DebugInfo/CodeView/CodeView.h"
 #include "llvm/DebugInfo/CodeView/DebugSubsection.h"
 #include "llvm/Support/BinaryStreamReader.h"
+#include "llvm/Support/Endian.h"
 #include "llvm/Support/Error.h"
 
 namespace llvm {
@@ -26,21 +27,23 @@ public:
   }
 
   Error initialize(BinaryStreamReader Reader);
+  Error initialize(BinaryStreamRef Stream);
 
   FixedStreamArray<FrameData>::Iterator begin() const { return Frames.begin(); }
   FixedStreamArray<FrameData>::Iterator end() const { return Frames.end(); }
 
-  const void *getRelocPtr() const { return RelocPtr; }
+  const support::ulittle32_t *getRelocPtr() const { return RelocPtr; }
 
 private:
-  const uint32_t *RelocPtr = nullptr;
+  const support::ulittle32_t *RelocPtr = nullptr;
   FixedStreamArray<FrameData> Frames;
 };
 
 class DebugFrameDataSubsection final : public DebugSubsection {
 public:
-  DebugFrameDataSubsection()
-      : DebugSubsection(DebugSubsectionKind::FrameData) {}
+  DebugFrameDataSubsection(bool IncludeRelocPtr)
+      : DebugSubsection(DebugSubsectionKind::FrameData),
+        IncludeRelocPtr(IncludeRelocPtr) {}
   static bool classof(const DebugSubsection *S) {
     return S->kind() == DebugSubsectionKind::FrameData;
   }
@@ -52,6 +55,7 @@ public:
   void setFrames(ArrayRef<FrameData> Frames);
 
 private:
+  bool IncludeRelocPtr = false;
   std::vector<FrameData> Frames;
 };
 }
diff --git a/include/llvm/DebugInfo/CodeView/RecordSerialization.h b/include/llvm/DebugInfo/CodeView/RecordSerialization.h
index 58449c2c7565..36237e1a4d9e 100644
--- a/include/llvm/DebugInfo/CodeView/RecordSerialization.h
+++ b/include/llvm/DebugInfo/CodeView/RecordSerialization.h
@@ -180,26 +180,6 @@ template <typename T> serialize_numeric_impl<T> serialize_numeric(T &Item) {
   return serialize_numeric_impl<T>(Item);
 }
 
-// This field is only present in the byte record if the condition is true.  The
-// condition is evaluated lazily, so it can depend on items that were
-// deserialized
-// earlier.
-#define CV_CONDITIONAL_FIELD(I, C)                                             \
-  serialize_conditional(I, [&]() { return !!(C); })
-
-// This is an array of N items, where N is evaluated lazily, so it can refer
-// to a field deserialized earlier.
-#define CV_ARRAY_FIELD_N(I, N) serialize_array(I, [&]() { return N; })
-
-// This is an array that exhausts the remainder of the input buffer.
-#define CV_ARRAY_FIELD_TAIL(I) serialize_array_tail(I)
-
-// This is an array that consumes null terminated strings until a double null
-// is encountered.
-#define CV_STRING_ARRAY_NULL_TERM(I) serialize_null_term_string_array(I)
-
-#define CV_NUMERIC_FIELD(I) serialize_numeric(I)
-
 template <typename T, typename U>
 Error consume(BinaryStreamReader &Reader,
               const serialize_conditional_impl<T, U> &Item) {
@@ -242,9 +222,6 @@ Error consume(BinaryStreamReader &Reader, T &&X, U &&Y, Args &&... Rest) {
   return consume(Reader, Y, std::forward<Args>(Rest)...);
 }
 
-#define CV_DESERIALIZE(...)                                                    \
-  if (auto EC = consume(__VA_ARGS__))                                          \
-    return std::move(EC);
 }
 }
 
diff --git a/include/llvm/DebugInfo/CodeView/SymbolDeserializer.h b/include/llvm/DebugInfo/CodeView/SymbolDeserializer.h
index b5479db97a15..6b5dd2d20d17 100644
--- a/include/llvm/DebugInfo/CodeView/SymbolDeserializer.h
+++ b/include/llvm/DebugInfo/CodeView/SymbolDeserializer.h
@@ -47,7 +47,7 @@ public:
     return Error::success();
   }
   template <typename T> static Expected<T> deserializeAs(CVSymbol Symbol) {
-    T Record(Symbol.kind());
+    T Record(static_cast<SymbolRecordKind>(Symbol.kind()));
     if (auto EC = deserializeAs<T>(Symbol, Record))
       return std::move(EC);
     return Record;
diff --git a/include/llvm/DebugInfo/CodeView/SymbolDumper.h b/include/llvm/DebugInfo/CodeView/SymbolDumper.h
index 293daa851bdd..215da2e2b522 100644
--- a/include/llvm/DebugInfo/CodeView/SymbolDumper.h
+++ b/include/llvm/DebugInfo/CodeView/SymbolDumper.h
@@ -27,10 +27,10 @@ class CVSymbolDumper {
 public:
   CVSymbolDumper(ScopedPrinter &W, TypeCollection &Types,
                  CodeViewContainer Container,
-                 std::unique_ptr<SymbolDumpDelegate> ObjDelegate,
+                 std::unique_ptr<SymbolDumpDelegate> ObjDelegate, CPUType CPU,
                  bool PrintRecordBytes)
       : W(W), Types(Types), Container(Container),
-        ObjDelegate(std::move(ObjDelegate)),
+        ObjDelegate(std::move(ObjDelegate)), CompilationCPUType(CPU),
         PrintRecordBytes(PrintRecordBytes) {}
 
   /// Dumps one type record.  Returns false if there was a type parsing error,
@@ -43,12 +43,14 @@ public:
   /// parse error, and true otherwise.
   Error dump(const CVSymbolArray &Symbols);
 
+  CPUType getCompilationCPUType() const { return CompilationCPUType; }
+
 private:
   ScopedPrinter &W;
   TypeCollection &Types;
   CodeViewContainer Container;
   std::unique_ptr<SymbolDumpDelegate> ObjDelegate;
-
+  CPUType CompilationCPUType;
   bool PrintRecordBytes;
 };
 } // end namespace codeview
diff --git a/include/llvm/DebugInfo/CodeView/SymbolRecord.h b/include/llvm/DebugInfo/CodeView/SymbolRecord.h
index 93306824012e..b58825c4a788 100644
--- a/include/llvm/DebugInfo/CodeView/SymbolRecord.h
+++ b/include/llvm/DebugInfo/CodeView/SymbolRecord.h
@@ -358,6 +358,7 @@ public:
 // S_PUB32
 class PublicSym32 : public SymbolRecord {
 public:
+  PublicSym32() : SymbolRecord(SymbolRecordKind::PublicSym32) {}
   explicit PublicSym32(SymbolRecordKind Kind) : SymbolRecord(Kind) {}
   explicit PublicSym32(uint32_t RecordOffset)
       : SymbolRecord(SymbolRecordKind::PublicSym32),
@@ -399,6 +400,7 @@ public:
   uint16_t Module;
   StringRef Name;
 
+  uint16_t modi() const { return Module - 1; }
   uint32_t RecordOffset;
 };
 
@@ -636,6 +638,7 @@ public:
 // S_OBJNAME
 class ObjNameSym : public SymbolRecord {
 public:
+  explicit ObjNameSym() : SymbolRecord(SymbolRecordKind::ObjNameSym) {}
   explicit ObjNameSym(SymbolRecordKind Kind) : SymbolRecord(Kind) {}
   ObjNameSym(uint32_t RecordOffset)
       : SymbolRecord(SymbolRecordKind::ObjNameSym), RecordOffset(RecordOffset) {
@@ -718,6 +721,7 @@ public:
 // S_COMPILE3
 class Compile3Sym : public SymbolRecord {
 public:
+  Compile3Sym() : SymbolRecord(SymbolRecordKind::Compile3Sym) {}
   explicit Compile3Sym(SymbolRecordKind Kind) : SymbolRecord(Kind) {}
   Compile3Sym(uint32_t RecordOffset)
       : SymbolRecord(SymbolRecordKind::Compile3Sym),
@@ -739,8 +743,17 @@ public:
     Flags = CompileSym3Flags((uint32_t(Flags) & 0xFFFFFF00) | uint32_t(Lang));
   }
 
-  uint8_t getLanguage() const { return static_cast<uint32_t>(Flags) & 0xFF; }
-  uint32_t getFlags() const { return static_cast<uint32_t>(Flags) & ~0xFF; }
+  SourceLanguage getLanguage() const {
+    return static_cast<SourceLanguage>(static_cast<uint32_t>(Flags) & 0xFF);
+  }
+  CompileSym3Flags getFlags() const {
+    return static_cast<CompileSym3Flags>(static_cast<uint32_t>(Flags) & ~0xFF);
+  }
+
+  bool hasOptimizations() const {
+    return CompileSym3Flags::None !=
+           (getFlags() & (CompileSym3Flags::PGO | CompileSym3Flags::LTCG));
+  }
 
   uint32_t RecordOffset;
 };
@@ -761,7 +774,21 @@ public:
   uint16_t SectionIdOfExceptionHandler;
   FrameProcedureOptions Flags;
 
+  /// Extract the register this frame uses to refer to local variables.
+  RegisterId getLocalFramePtrReg(CPUType CPU) const {
+    return decodeFramePtrReg(
+        EncodedFramePtrReg((uint32_t(Flags) >> 14U) & 0x3U), CPU);
+  }
+
+  /// Extract the register this frame uses to refer to parameters.
+  RegisterId getParamFramePtrReg(CPUType CPU) const {
+    return decodeFramePtrReg(
+        EncodedFramePtrReg((uint32_t(Flags) >> 16U) & 0x3U), CPU);
+  }
+
   uint32_t RecordOffset;
+
+private:
 };
 
 // S_CALLSITEINFO
diff --git a/include/llvm/DebugInfo/CodeView/SymbolRecordHelpers.h b/include/llvm/DebugInfo/CodeView/SymbolRecordHelpers.h
new file mode 100644
index 000000000000..3713fe118eaa
--- /dev/null
+++ b/include/llvm/DebugInfo/CodeView/SymbolRecordHelpers.h
@@ -0,0 +1,62 @@
+//===- SymbolRecordHelpers.h ------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_DEBUGINFO_CODEVIEW_SYMBOLRECORDHELPERS_H
+#define LLVM_DEBUGINFO_CODEVIEW_SYMBOLRECORDHELPERS_H
+
+#include "llvm/DebugInfo/CodeView/SymbolRecord.h"
+
+namespace llvm {
+namespace codeview {
+/// Return true if this symbol opens a scope. This implies that the symbol has
+/// "parent" and "end" fields, which contain the offset of the S_END or
+/// S_INLINESITE_END record.
+inline bool symbolOpensScope(SymbolKind Kind) {
+  switch (Kind) {
+  case SymbolKind::S_GPROC32:
+  case SymbolKind::S_LPROC32:
+  case SymbolKind::S_LPROC32_ID:
+  case SymbolKind::S_GPROC32_ID:
+  case SymbolKind::S_BLOCK32:
+  case SymbolKind::S_SEPCODE:
+  case SymbolKind::S_THUNK32:
+  case SymbolKind::S_INLINESITE:
+  case SymbolKind::S_INLINESITE2:
+    return true;
+  default:
+    break;
+  }
+  return false;
+}
+
+/// Return true if this ssymbol ends a scope.
+inline bool symbolEndsScope(SymbolKind Kind) {
+  switch (Kind) {
+  case SymbolKind::S_END:
+  case SymbolKind::S_PROC_ID_END:
+  case SymbolKind::S_INLINESITE_END:
+    return true;
+  default:
+    break;
+  }
+  return false;
+}
+
+/// Given a symbol P for which symbolOpensScope(P) == true, return the
+/// corresponding end offset.
+uint32_t getScopeEndOffset(const CVSymbol &Symbol);
+uint32_t getScopeParentOffset(const CVSymbol &Symbol);
+
+CVSymbolArray limitSymbolArrayToScope(const CVSymbolArray &Symbols,
+                                      uint32_t ScopeBegin);
+
+} // namespace codeview
+} // namespace llvm
+
+#endif
diff --git a/include/llvm/DebugInfo/CodeView/TypeIndex.h b/include/llvm/DebugInfo/CodeView/TypeIndex.h
index c71281de7145..58463a6b13df 100644
--- a/include/llvm/DebugInfo/CodeView/TypeIndex.h
+++ b/include/llvm/DebugInfo/CodeView/TypeIndex.h
@@ -134,6 +134,8 @@ public:
     return static_cast<SimpleTypeMode>(Index & SimpleModeMask);
   }
 
+  TypeIndex makeDirect() const { return TypeIndex{getSimpleKind()}; }
+
   static TypeIndex None() { return TypeIndex(SimpleTypeKind::None); }
   static TypeIndex Void() { return TypeIndex(SimpleTypeKind::Void); }
   static TypeIndex VoidPointer32() {
@@ -143,6 +145,13 @@ public:
     return TypeIndex(SimpleTypeKind::Void, SimpleTypeMode::NearPointer64);
   }
 
+  static TypeIndex NullptrT() {
+    // std::nullptr_t uses the pointer mode that doesn't indicate bit-width,
+    // presumably because std::nullptr_t is intended to be compatible with any
+    // pointer type.
+    return TypeIndex(SimpleTypeKind::Void, SimpleTypeMode::NearPointer);
+  }
+
   static TypeIndex SignedCharacter() {
     return TypeIndex(SimpleTypeKind::SignedCharacter);
   }
diff --git a/include/llvm/DebugInfo/CodeView/TypeRecord.h b/include/llvm/DebugInfo/CodeView/TypeRecord.h
index 61ebdf878ce7..7b4a30ee622d 100644
--- a/include/llvm/DebugInfo/CodeView/TypeRecord.h
+++ b/include/llvm/DebugInfo/CodeView/TypeRecord.h
@@ -95,6 +95,11 @@ struct MemberAttributes {
     return MP == MethodKind::IntroducingVirtual ||
            MP == MethodKind::PureIntroducingVirtual;
   }
+
+  /// Is this method static.
+  bool isStatic() const {
+    return getMethodKind() == MethodKind::Static;
+  }
 };
 
 // Does not correspond to any tag, this is the tail of an LF_POINTER record
@@ -264,14 +269,18 @@ public:
 // LF_POINTER
 class PointerRecord : public TypeRecord {
 public:
+  // ---------------------------XXXXX
   static const uint32_t PointerKindShift = 0;
   static const uint32_t PointerKindMask = 0x1F;
 
+  // ------------------------XXX-----
   static const uint32_t PointerModeShift = 5;
   static const uint32_t PointerModeMask = 0x07;
 
-  static const uint32_t PointerOptionMask = 0xFF;
+  // ----------XXX------XXXXX--------
+  static const uint32_t PointerOptionMask = 0x381f00;
 
+  // -------------XXXXXX------------
   static const uint32_t PointerSizeShift = 13;
   static const uint32_t PointerSizeMask = 0xFF;
 
@@ -305,7 +314,7 @@ public:
   }
 
   PointerOptions getOptions() const {
-    return static_cast<PointerOptions>(Attrs);
+    return static_cast<PointerOptions>(Attrs & PointerOptionMask);
   }
 
   uint8_t getSize() const {
@@ -334,6 +343,14 @@ public:
     return !!(Attrs & uint32_t(PointerOptions::Restrict));
   }
 
+  bool isLValueReferenceThisPtr() const {
+    return !!(Attrs & uint32_t(PointerOptions::LValueRefThisPointer));
+  }
+
+  bool isRValueReferenceThisPtr() const {
+    return !!(Attrs & uint32_t(PointerOptions::RValueRefThisPointer));
+  }
+
   TypeIndex ReferentType;
   uint32_t Attrs;
   Optional<MemberPointerInfo> MemberInfo;
@@ -429,6 +446,14 @@ public:
     return (Options & ClassOptions::ForwardReference) != ClassOptions::None;
   }
 
+  bool containsNestedClass() const {
+    return (Options & ClassOptions::ContainsNestedClass) != ClassOptions::None;
+  }
+
+  bool isScoped() const {
+    return (Options & ClassOptions::Scoped) != ClassOptions::None;
+  }
+
   uint16_t getMemberCount() const { return MemberCount; }
   ClassOptions getOptions() const { return Options; }
   TypeIndex getFieldList() const { return FieldList; }
@@ -655,7 +680,17 @@ public:
 
   ArrayRef<TypeIndex> getArgs() const { return ArgIndices; }
 
-  SmallVector<TypeIndex, 4> ArgIndices;
+  /// Indices of known build info arguments.
+  enum BuildInfoArg {
+    CurrentDirectory, ///< Absolute CWD path
+    BuildTool,        ///< Absolute compiler path
+    SourceFile,       ///< Path to main source file, relative or absolute
+    TypeServerPDB,    ///< Absolute path of type server PDB (/Fd)
+    CommandLine,      ///< Full canonical command line (maybe -cc1)
+    MaxArgs
+  };
+
+  SmallVector<TypeIndex, MaxArgs> ArgIndices;
 };
 
 // LF_VFTABLE
@@ -923,6 +958,7 @@ public:
 
   uint32_t Signature;
 };
+
 } // end namespace codeview
 } // end namespace llvm
 
diff --git a/include/llvm/DebugInfo/CodeView/TypeRecordHelpers.h b/include/llvm/DebugInfo/CodeView/TypeRecordHelpers.h
new file mode 100644
index 000000000000..389472ed1aea
--- /dev/null
+++ b/include/llvm/DebugInfo/CodeView/TypeRecordHelpers.h
@@ -0,0 +1,28 @@
+//===- TypeRecordHelpers.h --------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_DEBUGINFO_CODEVIEW_TYPERECORDHELPERS_H
+#define LLVM_DEBUGINFO_CODEVIEW_TYPERECORDHELPERS_H
+
+#include "llvm/DebugInfo/CodeView/TypeRecord.h"
+
+namespace llvm {
+  namespace codeview {
+    /// Given an arbitrary codeview type, determine if it is an LF_STRUCTURE,
+    /// LF_CLASS, LF_INTERFACE, LF_UNION, or LF_ENUM with the forward ref class
+    /// option.
+    bool isUdtForwardRef(CVType CVT);
+
+    /// Given a CVType which is assumed to be an LF_MODIFIER, return the
+    /// TypeIndex of the type that the LF_MODIFIER modifies.
+    TypeIndex getModifiedType(const CVType &CVT);
+  }
+}
+
+#endif
diff --git a/include/llvm/DebugInfo/CodeView/TypeStreamMerger.h b/include/llvm/DebugInfo/CodeView/TypeStreamMerger.h
index 583740d2eb4b..0b9f54ec60bf 100644
--- a/include/llvm/DebugInfo/CodeView/TypeStreamMerger.h
+++ b/include/llvm/DebugInfo/CodeView/TypeStreamMerger.h
@@ -83,18 +83,21 @@ Error mergeIdRecords(MergingTypeTableBuilder &Dest, ArrayRef<TypeIndex> Types,
 Error mergeTypeAndIdRecords(MergingTypeTableBuilder &DestIds,
                             MergingTypeTableBuilder &DestTypes,
                             SmallVectorImpl<TypeIndex> &SourceToDest,
-                            const CVTypeArray &IdsAndTypes);
+                            const CVTypeArray &IdsAndTypes,
+                            Optional<uint32_t> &PCHSignature);
 
 Error mergeTypeAndIdRecords(GlobalTypeTableBuilder &DestIds,
                             GlobalTypeTableBuilder &DestTypes,
                             SmallVectorImpl<TypeIndex> &SourceToDest,
                             const CVTypeArray &IdsAndTypes,
-                            ArrayRef<GloballyHashedType> Hashes);
+                            ArrayRef<GloballyHashedType> Hashes,
+                            Optional<uint32_t> &PCHSignature);
 
 Error mergeTypeRecords(GlobalTypeTableBuilder &Dest,
                        SmallVectorImpl<TypeIndex> &SourceToDest,
                        const CVTypeArray &Types,
-                       ArrayRef<GloballyHashedType> Hashes);
+                       ArrayRef<GloballyHashedType> Hashes,
+                       Optional<uint32_t> &PCHSignature);
 
 Error mergeIdRecords(GlobalTypeTableBuilder &Dest, ArrayRef<TypeIndex> Types,
                      SmallVectorImpl<TypeIndex> &SourceToDest,