Merge clang, llvm, lld, lldb, compiler-rt and libc++ 5.0.0 release.

MFC r309126 (by emaste):

  Correct lld llvm-tblgen dependency file name

MFC r309169:

  Get rid of separate Subversion mergeinfo properties for llvm-dwarfdump
  and llvm-lto.  The mergeinfo confuses Subversion enormously, and these
  directories will just use the mergeinfo for llvm itself.

MFC r312765:

  Pull in r276136 from upstream llvm trunk (by Wei Mi):

    Use ValueOffsetPair to enhance value reuse during SCEV expansion.

    In D12090, the ExprValueMap was added to reuse existing value during
    SCEV expansion. However, const folding and sext/zext distribution can
    make the reuse still difficult.

    A simplified case is: suppose we know S1 expands to V1 in
    ExprValueMap, and
      S1 = S2 + C_a
      S3 = S2 + C_b
    where C_a and C_b are different SCEVConstants. Then we'd like to
    expand S3 as V1 - C_a + C_b instead of expanding S2 literally. It is
    helpful when S2 is a complex SCEV expr and S2 has no entry in
    ExprValueMap, which is usually caused by the fact that S3 is
    generated from S1 after const folding.

    In order to do that, we represent ExprValueMap as a mapping from SCEV
    to ValueOffsetPair. We will save both S1->{V1, 0} and S2->{V1, C_a}
    into the ExprValueMap when we create SCEV for V1. When S3 is
    expanded, it will first expand S2 to V1 - C_a because of S2->{V1,
    C_a} in the map, then expand S3 to V1 - C_a + C_b.

    Differential Revision: https://reviews.llvm.org/D21313

  This should fix assertion failures when building OpenCV >= 3.1.

  PR:		215649

MFC r312831:

  Revert r312765 for now, since it causes assertions when building
  lang/spidermonkey24.

  Reported by:	antoine
  PR:		215649

MFC r316511 (by jhb):

  Add an implementation of __ffssi2() derived from __ffsdi2().

  Newer versions of GCC include an __ffssi2() symbol in libgcc and the
  compiler can emit calls to it in generated code.  This is true for at
  least GCC 6.2 when compiling world for mips and mips64.

  Reviewed by:	jmallett, dim
  Sponsored by:	DARPA / AFRL
  Differential Revision:	https://reviews.freebsd.org/D10086

MFC r318601 (by adrian):

  [libcompiler-rt] add bswapdi2/bswapsi2

  This is required for mips gcc 6.3 userland to build/run.

  Reviewed by:	emaste, dim
  Approved by:	emaste
  Differential Revision:	https://reviews.freebsd.org/D10838

MFC r318884 (by emaste):

  lldb: map TRAP_CAP to a trace trap

  In the absense of a more specific handler for TRAP_CAP (generated by
  ENOTCAPABLE or ECAPMODE while in capability mode) treat it as a trace
  trap.

  Example usage (testing the bug in PR219173):

  % proccontrol -m trapcap lldb usr.bin/hexdump/obj/hexdump -- -Cv -s 1 /bin/ls
  ...
  (lldb) run
  Process 12980 launching
  Process 12980 launched: '.../usr.bin/hexdump/obj/hexdump' (x86_64)
  Process 12980 stopped
  * thread #1, stop reason = trace
      frame #0: 0x0000004b80c65f1a libc.so.7`__sys_lseek + 10
  ...

  In the future we should have LLDB control the trapcap procctl itself
  (as it does with ASLR), as well as report a specific stop reason.
  This change eliminates an assertion failure from LLDB for now.

MFC r319796:

  Remove a few unneeded files from libllvm, libclang and liblldb.

MFC r319885 (by emaste):

  lld: ELF: Fix ICF crash on absolute symbol relocations.

  If two sections contained relocations to absolute symbols with the same
  value we would crash when trying to access their sections. Add a check that
  both symbols point to sections before accessing their sections, and treat
  absolute symbols as equal if their values are equal.

  Obtained from:	LLD commit r292578

MFC r319918:

  Revert r319796 for now, it can cause undefined references when linking
  in some circumstances.

  Reported by:	Shawn Webb <shawn.webb@hardenedbsd.org>

MFC r319957 (by emaste):

  lld: Add armelf emulation mode

  Obtained from:	LLD r305375

MFC r321369:

  Upgrade our copies of clang, llvm, lld, lldb, compiler-rt and libc++ to
  5.0.0 (trunk r308421).  Upstream has branched for the 5.0.0 release,
  which should be in about a month.  Please report bugs and regressions,
  so we can get them into the release.

  Please note that from 3.5.0 onwards, clang, llvm and lldb require C++11
  support to build; see UPDATING for more information.

MFC r321420:

  Add a few more object files to liblldb, which should solve errors when
  linking the lldb executable in some cases.  In particular, when the
  -ffunction-sections -fdata-sections options are turned off, or
  ineffective.

  Reported by:	Shawn Webb, Mark Millard

MFC r321433:

  Cleanup stale Options.inc files from the previous libllvm build for
  clang 4.0.0.  Otherwise, these can get included before the two newly
  generated ones (which are different) for clang 5.0.0.

  Reported by:	Mark Millard

MFC r321439 (by bdrewery):

  Move llvm Options.inc hack from r321433 for NO_CLEAN to lib/clang/libllvm.

  The files are only ever generated to .OBJDIR, not to WORLDTMP (as a
  sysroot) and are only ever included from a compilation.  So using
  a beforebuild target here removes the file before the compilation
  tries to include it.

MFC r321664:

  Pull in r308891 from upstream llvm trunk (by Benjamin Kramer):

    [CodeGenPrepare] Cut off FindAllMemoryUses if there are too many uses.

    This avoids excessive compile time. The case I'm looking at is
    Function.cpp from an old version of LLVM that still had the giant
    memcmp string matcher in it. Before r308322 this compiled in about 2
    minutes, after it, clang takes infinite* time to compile it. With
    this patch we're at 5 min, which is still bad but this is a
    pathological case.

    The cut off at 20 uses was chosen by looking at other cut-offs in LLVM
    for user scanning. It's probably too high, but does the job and is
    very unlikely to regress anything.

    Fixes PR33900.

    * I'm impatient and aborted after 15 minutes, on the bug report it was
      killed after 2h.

  Pull in r308986 from upstream llvm trunk (by Simon Pilgrim):

    [X86][CGP] Reduce memcmp() expansion to 2 load pairs (PR33914)

    D35067/rL308322 attempted to support up to 4 load pairs for memcmp
    inlining which resulted in regressions for some optimized libc memcmp
    implementations (PR33914).

    Until we can match these more optimal cases, this patch reduces the
    memcmp expansion to a maximum of 2 load pairs (which matches what we
    do for -Os).

    This patch should be considered for the 5.0.0 release branch as well

    Differential Revision: https://reviews.llvm.org/D35830

  These fix a hang (or extremely long compile time) when building older
  LLVM ports.

  Reported by:    antoine
  PR:             219139

MFC r321719:

  Pull in r309503 from upstream clang trunk (by Richard Smith):

    PR33902: Invalidate line number cache when adding more text to
    existing buffer.

    This led to crashes as the line number cache would report a bogus
    line number for a line of code, and we'd try to find a nonexistent
    column within the line when printing diagnostics.

  This fixes an assertion when building the graphics/champlain port.

  Reported by:	antoine, kwm
  PR:		219139

MFC r321723:

  Upgrade our copies of clang, llvm, lld and lldb to r309439 from the
  upstream release_50 branch.  This is just after upstream's 5.0.0-rc1.

MFC r322320:

  Upgrade our copies of clang, llvm and libc++ to r310316 from the
  upstream release_50 branch.

MFC r322326 (by emaste):

  lldb: Make i386-*-freebsd expression work on JIT path

  * Enable i386 ABI creation for freebsd
  * Added an extra argument in ABISysV_i386::PrepareTrivialCall for mmap
    syscall
  * Unlike linux, the last argument of mmap is actually 64-bit(off_t).
    This requires us to push an additional word for the higher order bits.
  * Prior to this change, ktrace dump will show mmap failures due to
    invalid argument coming from the 6th mmap argument.

  Submitted by:	Karnajit Wangkhem
  Differential Revision:	https://reviews.llvm.org/D34776

MFC r322360 (by emaste):

  lldb: Report inferior signals as signals, not exceptions, on FreeBSD

  This is the FreeBSD equivalent of LLVM r238549.

  This serves 2 purposes:

  * LLDB should handle inferior process signals SIGSEGV/SIGILL/SIGBUS/
    SIGFPE the way it is suppose to be handled. Prior to this fix these
    signals will neither create a coredump, nor exit from the debugger
    or work for signal handling scenario.
  * eInvalidCrashReason need not report "unknown crash reason" if we have
    a valid si_signo

  llvm.org/pr23699

  Patch by Karnajit Wangkhem

  Differential Revision:  https://reviews.llvm.org/D35223

  Submitted by:	Karnajit Wangkhem
  Obtained from:	LLVM r310591

MFC r322474 (by emaste):

  lld: Add `-z muldefs` option.

  Obtained from:	LLVM r310757

MFC r322740:

  Upgrade our copies of clang, llvm, lld and libc++ to r311219 from the
  upstream release_50 branch.

MFC r322855:

  Upgrade our copies of clang, llvm, lldb and compiler-rt to r311606 from
  the upstream release_50 branch.

  As of this version, lib/msun's trig test should also work correctly
  again (see bug 220989 for more information).

  PR:		220989

MFC r323112:

  Upgrade our copies of clang, llvm, lldb and compiler-rt to r312293 from
  the upstream release_50 branch.  This corresponds to 5.0.0 rc4.

  As of this version, the cad/stepcode port should now compile in a more
  reasonable time on i386 (see bug 221836 for more information).

  PR:		221836

MFC r323245:

  Upgrade our copies of clang, llvm, lld, lldb, compiler-rt and libc++ to
  5.0.0 release (upstream r312559).

  Release notes for llvm, clang and lld will be available here soon:
  <http://releases.llvm.org/5.0.0/docs/ReleaseNotes.html>
  <http://releases.llvm.org/5.0.0/tools/clang/docs/ReleaseNotes.html>
  <http://releases.llvm.org/5.0.0/tools/lld/docs/ReleaseNotes.html>

  Relnotes:	yes

(cherry picked from commit 12cd91cf4c6b96a24427c0de5374916f2808d263)

86 files changed, 4290 insertions, 1792 deletions

diff --git a/contrib/llvm/lib/DebugInfo/PDB/DIA/DIAEnumDebugStreams.cpp b/contrib/llvm/lib/DebugInfo/PDB/DIA/DIAEnumDebugStreams.cpp
index cae817c..f62c499 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/DIA/DIAEnumDebugStreams.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/DIA/DIAEnumDebugStreams.cpp
@@ -7,9 +7,9 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "llvm/DebugInfo/PDB/PDBSymbol.h"
-#include "llvm/DebugInfo/PDB/DIA/DIADataStream.h"
 #include "llvm/DebugInfo/PDB/DIA/DIAEnumDebugStreams.h"
+#include "llvm/DebugInfo/PDB/DIA/DIADataStream.h"
+#include "llvm/DebugInfo/PDB/PDBSymbol.h"
 
 using namespace llvm;
 using namespace llvm::pdb;
diff --git a/contrib/llvm/lib/DebugInfo/PDB/DIA/DIAEnumLineNumbers.cpp b/contrib/llvm/lib/DebugInfo/PDB/DIA/DIAEnumLineNumbers.cpp
index 4741d9c..796ce21 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/DIA/DIAEnumLineNumbers.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/DIA/DIAEnumLineNumbers.cpp
@@ -7,9 +7,9 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "llvm/DebugInfo/PDB/PDBSymbol.h"
 #include "llvm/DebugInfo/PDB/DIA/DIAEnumLineNumbers.h"
 #include "llvm/DebugInfo/PDB/DIA/DIALineNumber.h"
+#include "llvm/DebugInfo/PDB/PDBSymbol.h"
 
 using namespace llvm;
 using namespace llvm::pdb;
diff --git a/contrib/llvm/lib/DebugInfo/PDB/DIA/DIAEnumSourceFiles.cpp b/contrib/llvm/lib/DebugInfo/PDB/DIA/DIAEnumSourceFiles.cpp
index ccf8c4e..b9311d0 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/DIA/DIAEnumSourceFiles.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/DIA/DIAEnumSourceFiles.cpp
@@ -7,9 +7,9 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "llvm/DebugInfo/PDB/PDBSymbol.h"
 #include "llvm/DebugInfo/PDB/DIA/DIAEnumSourceFiles.h"
 #include "llvm/DebugInfo/PDB/DIA/DIASourceFile.h"
+#include "llvm/DebugInfo/PDB/PDBSymbol.h"
 
 using namespace llvm;
 using namespace llvm::pdb;
diff --git a/contrib/llvm/lib/DebugInfo/PDB/DIA/DIAEnumSymbols.cpp b/contrib/llvm/lib/DebugInfo/PDB/DIA/DIAEnumSymbols.cpp
index 3c211b5..2666385 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/DIA/DIAEnumSymbols.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/DIA/DIAEnumSymbols.cpp
@@ -7,10 +7,10 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "llvm/DebugInfo/PDB/PDBSymbol.h"
 #include "llvm/DebugInfo/PDB/DIA/DIAEnumSymbols.h"
 #include "llvm/DebugInfo/PDB/DIA/DIARawSymbol.h"
 #include "llvm/DebugInfo/PDB/DIA/DIASession.h"
+#include "llvm/DebugInfo/PDB/PDBSymbol.h"
 
 using namespace llvm;
 using namespace llvm::pdb;
diff --git a/contrib/llvm/lib/DebugInfo/PDB/DIA/DIARawSymbol.cpp b/contrib/llvm/lib/DebugInfo/PDB/DIA/DIARawSymbol.cpp
index bba5b0f..4c59d2f 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/DIA/DIARawSymbol.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/DIA/DIARawSymbol.cpp
@@ -10,9 +10,14 @@
 #include "llvm/DebugInfo/PDB/DIA/DIARawSymbol.h"
 #include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/STLExtras.h"
+#include "llvm/DebugInfo/CodeView/Formatters.h"
 #include "llvm/DebugInfo/PDB/DIA/DIAEnumSymbols.h"
 #include "llvm/DebugInfo/PDB/DIA/DIASession.h"
 #include "llvm/DebugInfo/PDB/PDBExtras.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypeBuiltin.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypePointer.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypeVTable.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypeVTableShape.h"
 #include "llvm/Support/ConvertUTF.h"
 #include "llvm/Support/raw_ostream.h"
 
@@ -120,16 +125,16 @@ PrivateGetDIAValue(IDiaSymbol *Symbol,
   return Result8;
 }
 
-PDB_UniqueId
+codeview::GUID
 PrivateGetDIAValue(IDiaSymbol *Symbol,
                    HRESULT (__stdcall IDiaSymbol::*Method)(GUID *)) {
   GUID Result;
   if (S_OK != (Symbol->*Method)(&Result))
-    return PDB_UniqueId();
+    return codeview::GUID();
 
-  static_assert(sizeof(PDB_UniqueId) == sizeof(GUID),
-                "PDB_UniqueId is the wrong size!");
-  PDB_UniqueId IdResult;
+  static_assert(sizeof(codeview::GUID) == sizeof(GUID),
+                "GUID is the wrong size!");
+  codeview::GUID IdResult;
   ::memcpy(&IdResult, &Result, sizeof(GUID));
   return IdResult;
 }
@@ -178,9 +183,10 @@ void DumpDIAValue(llvm::raw_ostream &OS, int Indent, StringRef Name,
 }
 
 namespace llvm {
-raw_ostream &operator<<(raw_ostream &OS, const GUID &Guid) {
-  const PDB_UniqueId *Id = reinterpret_cast<const PDB_UniqueId *>(&Guid);
-  OS << *Id;
+llvm::raw_ostream &operator<<(llvm::raw_ostream &OS, const GUID &G) {
+  StringRef GuidBytes(reinterpret_cast<const char *>(&G), sizeof(G));
+  codeview::detail::GuidAdapter A(GuidBytes);
+  A.format(OS, "");
   return OS;
 }
 }
@@ -366,8 +372,11 @@ DIARawSymbol::findChildren(PDB_SymType Type) const {
   enum SymTagEnum EnumVal = static_cast<enum SymTagEnum>(Type);
 
   CComPtr<IDiaEnumSymbols> DiaEnumerator;
-  if (S_OK != Symbol->findChildrenEx(EnumVal, nullptr, nsNone, &DiaEnumerator))
-    return nullptr;
+  if (S_OK !=
+      Symbol->findChildrenEx(EnumVal, nullptr, nsNone, &DiaEnumerator)) {
+    if (S_OK != Symbol->findChildren(EnumVal, nullptr, nsNone, &DiaEnumerator))
+      return nullptr;
+  }
 
   return llvm::make_unique<DIAEnumSymbols>(Session, DiaEnumerator);
 }
@@ -715,6 +724,18 @@ uint32_t DIARawSymbol::getVirtualTableShapeId() const {
   return PrivateGetDIAValue(Symbol, &IDiaSymbol::get_virtualTableShapeId);
 }
 
+std::unique_ptr<PDBSymbolTypeBuiltin>
+DIARawSymbol::getVirtualBaseTableType() const {
+  CComPtr<IDiaSymbol> TableType;
+  if (FAILED(Symbol->get_virtualBaseTableType(&TableType)) || !TableType)
+    return nullptr;
+
+  auto RawVT = llvm::make_unique<DIARawSymbol>(Session, TableType);
+  auto Pointer =
+      llvm::make_unique<PDBSymbolTypePointer>(Session, std::move(RawVT));
+  return unique_dyn_cast<PDBSymbolTypeBuiltin>(Pointer->getPointeeType());
+}
+
 PDB_DataKind DIARawSymbol::getDataKind() const {
   return PrivateGetDIAValue<DWORD, PDB_DataKind>(Symbol,
                                                  &IDiaSymbol::get_dataKind);
@@ -725,7 +746,7 @@ PDB_SymType DIARawSymbol::getSymTag() const {
                                                 &IDiaSymbol::get_symTag);
 }
 
-PDB_UniqueId DIARawSymbol::getGuid() const {
+codeview::GUID DIARawSymbol::getGuid() const {
   return PrivateGetDIAValue(Symbol, &IDiaSymbol::get_guid);
 }
 
diff --git a/contrib/llvm/lib/DebugInfo/PDB/DIA/DIASession.cpp b/contrib/llvm/lib/DebugInfo/PDB/DIA/DIASession.cpp
index 6ecf335..ef9390c 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/DIA/DIASession.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/DIA/DIASession.cpp
@@ -21,12 +21,22 @@
 #include "llvm/DebugInfo/PDB/PDBSymbolExe.h"
 #include "llvm/Support/ConvertUTF.h"
 #include "llvm/Support/Format.h"
+#include "llvm/Support/FormatVariadic.h"
 #include "llvm/Support/raw_ostream.h"
 
 using namespace llvm;
 using namespace llvm::pdb;
 
-static Error ErrorFromHResult(HRESULT Result, StringRef Context) {
+template <typename... Ts>
+static Error ErrorFromHResult(HRESULT Result, const char *Str, Ts &&... Args) {
+  SmallString<64> MessageStorage;
+  StringRef Context;
+  if (sizeof...(Args) > 0) {
+    MessageStorage = formatv(Str, std::forward<Ts>(Args)...).str();
+    Context = MessageStorage;
+  } else
+    Context = Str;
+
   switch (Result) {
   case E_PDB_NOT_FOUND:
     return make_error<GenericError>(generic_error_code::invalid_path, Context);
@@ -95,8 +105,9 @@ Error DIASession::createFromPdb(StringRef Path,
 
   const wchar_t *Path16Str = reinterpret_cast<const wchar_t*>(Path16.data());
   HRESULT HR;
-  if (FAILED(HR = DiaDataSource->loadDataFromPdb(Path16Str)))
-    return ErrorFromHResult(HR, "Calling loadDataFromPdb");
+  if (FAILED(HR = DiaDataSource->loadDataFromPdb(Path16Str))) {
+    return ErrorFromHResult(HR, "Calling loadDataFromPdb {0}", Path);
+  }
 
   if (FAILED(HR = DiaDataSource->openSession(&DiaSession)))
     return ErrorFromHResult(HR, "Calling openSession");
@@ -140,7 +151,7 @@ void DIASession::setLoadAddress(uint64_t Address) {
   Session->put_loadAddress(Address);
 }
 
-std::unique_ptr<PDBSymbolExe> DIASession::getGlobalScope() const {
+std::unique_ptr<PDBSymbolExe> DIASession::getGlobalScope() {
   CComPtr<IDiaSymbol> GlobalScope;
   if (S_OK != Session->get_globalScope(&GlobalScope))
     return nullptr;
diff --git a/contrib/llvm/lib/DebugInfo/PDB/GenericError.cpp b/contrib/llvm/lib/DebugInfo/PDB/GenericError.cpp
index 789f3b8..4fcecb9 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/GenericError.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/GenericError.cpp
@@ -26,6 +26,8 @@ public:
     switch (static_cast<generic_error_code>(Condition)) {
     case generic_error_code::unspecified:
       return "An unknown error has occurred.";
+    case generic_error_code::type_server_not_found:
+      return "Type server PDB was not found.";
     case generic_error_code::dia_sdk_not_present:
       return "LLVM was not compiled with support for DIA.  This usually means "
              "that you are are not using MSVC, or your Visual Studio "
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Native/DbiModuleDescriptor.cpp b/contrib/llvm/lib/DebugInfo/PDB/Native/DbiModuleDescriptor.cpp
new file mode 100644
index 0000000..dabcc34
--- /dev/null
+++ b/contrib/llvm/lib/DebugInfo/PDB/Native/DbiModuleDescriptor.cpp
@@ -0,0 +1,90 @@
+//===- DbiModuleDescriptor.cpp - PDB module information -------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/PDB/Native/DbiModuleDescriptor.h"
+#include "llvm/DebugInfo/PDB/Native/RawTypes.h"
+#include "llvm/Support/BinaryStreamReader.h"
+#include "llvm/Support/Endian.h"
+#include "llvm/Support/Error.h"
+#include "llvm/Support/MathExtras.h"
+#include <cstdint>
+
+using namespace llvm;
+using namespace llvm::pdb;
+using namespace llvm::support;
+
+DbiModuleDescriptor::DbiModuleDescriptor() = default;
+
+DbiModuleDescriptor::DbiModuleDescriptor(const DbiModuleDescriptor &Info) =
+    default;
+
+DbiModuleDescriptor::~DbiModuleDescriptor() = default;
+
+Error DbiModuleDescriptor::initialize(BinaryStreamRef Stream,
+                                      DbiModuleDescriptor &Info) {
+  BinaryStreamReader Reader(Stream);
+  if (auto EC = Reader.readObject(Info.Layout))
+    return EC;
+
+  if (auto EC = Reader.readCString(Info.ModuleName))
+    return EC;
+
+  if (auto EC = Reader.readCString(Info.ObjFileName))
+    return EC;
+  return Error::success();
+}
+
+bool DbiModuleDescriptor::hasECInfo() const {
+  return (Layout->Flags & ModInfoFlags::HasECFlagMask) != 0;
+}
+
+uint16_t DbiModuleDescriptor::getTypeServerIndex() const {
+  return (Layout->Flags & ModInfoFlags::TypeServerIndexMask) >>
+         ModInfoFlags::TypeServerIndexShift;
+}
+
+uint16_t DbiModuleDescriptor::getModuleStreamIndex() const {
+  return Layout->ModDiStream;
+}
+
+uint32_t DbiModuleDescriptor::getSymbolDebugInfoByteSize() const {
+  return Layout->SymBytes;
+}
+
+uint32_t DbiModuleDescriptor::getC11LineInfoByteSize() const {
+  return Layout->C11Bytes;
+}
+
+uint32_t DbiModuleDescriptor::getC13LineInfoByteSize() const {
+  return Layout->C13Bytes;
+}
+
+uint32_t DbiModuleDescriptor::getNumberOfFiles() const {
+  return Layout->NumFiles;
+}
+
+uint32_t DbiModuleDescriptor::getSourceFileNameIndex() const {
+  return Layout->SrcFileNameNI;
+}
+
+uint32_t DbiModuleDescriptor::getPdbFilePathNameIndex() const {
+  return Layout->PdbFilePathNI;
+}
+
+StringRef DbiModuleDescriptor::getModuleName() const { return ModuleName; }
+
+StringRef DbiModuleDescriptor::getObjFileName() const { return ObjFileName; }
+
+uint32_t DbiModuleDescriptor::getRecordLength() const {
+  uint32_t M = ModuleName.str().size() + 1;
+  uint32_t O = ObjFileName.str().size() + 1;
+  uint32_t Size = sizeof(ModuleInfoHeader) + M + O;
+  Size = alignTo(Size, 4);
+  return Size;
+}
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Native/DbiModuleDescriptorBuilder.cpp b/contrib/llvm/lib/DebugInfo/PDB/Native/DbiModuleDescriptorBuilder.cpp
new file mode 100644
index 0000000..897f78c
--- /dev/null
+++ b/contrib/llvm/lib/DebugInfo/PDB/Native/DbiModuleDescriptorBuilder.cpp
@@ -0,0 +1,196 @@
+//===- DbiModuleDescriptorBuilder.cpp - PDB Mod Info Creation ---*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/PDB/Native/DbiModuleDescriptorBuilder.h"
+
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/BinaryFormat/COFF.h"
+#include "llvm/DebugInfo/CodeView/DebugSubsectionRecord.h"
+#include "llvm/DebugInfo/MSF/MSFBuilder.h"
+#include "llvm/DebugInfo/MSF/MSFCommon.h"
+#include "llvm/DebugInfo/MSF/MappedBlockStream.h"
+#include "llvm/DebugInfo/PDB/Native/DbiModuleDescriptor.h"
+#include "llvm/DebugInfo/PDB/Native/RawConstants.h"
+#include "llvm/DebugInfo/PDB/Native/RawError.h"
+#include "llvm/Support/BinaryItemStream.h"
+#include "llvm/Support/BinaryStreamWriter.h"
+
+using namespace llvm;
+using namespace llvm::codeview;
+using namespace llvm::msf;
+using namespace llvm::pdb;
+
+namespace llvm {
+template <> struct BinaryItemTraits<CVSymbol> {
+  static size_t length(const CVSymbol &Item) { return Item.RecordData.size(); }
+
+  static ArrayRef<uint8_t> bytes(const CVSymbol &Item) {
+    return Item.RecordData;
+  }
+};
+}
+
+static uint32_t calculateDiSymbolStreamSize(uint32_t SymbolByteSize,
+                                            uint32_t C13Size) {
+  uint32_t Size = sizeof(uint32_t);   // Signature
+  Size += alignTo(SymbolByteSize, 4); // Symbol Data
+  Size += 0;                          // TODO: Layout.C11Bytes
+  Size += C13Size;                    // C13 Debug Info Size
+  Size += sizeof(uint32_t);           // GlobalRefs substream size (always 0)
+  Size += 0;                          // GlobalRefs substream bytes
+  return Size;
+}
+
+DbiModuleDescriptorBuilder::DbiModuleDescriptorBuilder(StringRef ModuleName,
+                                                       uint32_t ModIndex,
+                                                       msf::MSFBuilder &Msf)
+    : MSF(Msf), ModuleName(ModuleName) {
+  ::memset(&Layout, 0, sizeof(Layout));
+  Layout.Mod = ModIndex;
+}
+
+DbiModuleDescriptorBuilder::~DbiModuleDescriptorBuilder() {}
+
+uint16_t DbiModuleDescriptorBuilder::getStreamIndex() const {
+  return Layout.ModDiStream;
+}
+
+void DbiModuleDescriptorBuilder::setObjFileName(StringRef Name) {
+  ObjFileName = Name;
+}
+
+void DbiModuleDescriptorBuilder::setPdbFilePathNI(uint32_t NI) {
+  PdbFilePathNI = NI;
+}
+
+void DbiModuleDescriptorBuilder::addSymbol(CVSymbol Symbol) {
+  Symbols.push_back(Symbol);
+  // Symbols written to a PDB file are required to be 4 byte aligned.  The same
+  // is not true of object files.
+  assert(Symbol.length() % alignOf(CodeViewContainer::Pdb) == 0 &&
+         "Invalid Symbol alignment!");
+  SymbolByteSize += Symbol.length();
+}
+
+void DbiModuleDescriptorBuilder::addSourceFile(StringRef Path) {
+  SourceFiles.push_back(Path);
+}
+
+uint32_t DbiModuleDescriptorBuilder::calculateC13DebugInfoSize() const {
+  uint32_t Result = 0;
+  for (const auto &Builder : C13Builders) {
+    assert(Builder && "Empty C13 Fragment Builder!");
+    Result += Builder->calculateSerializedLength();
+  }
+  return Result;
+}
+
+uint32_t DbiModuleDescriptorBuilder::calculateSerializedLength() const {
+  uint32_t L = sizeof(Layout);
+  uint32_t M = ModuleName.size() + 1;
+  uint32_t O = ObjFileName.size() + 1;
+  return alignTo(L + M + O, sizeof(uint32_t));
+}
+
+template <typename T> struct Foo {
+  explicit Foo(T &&Answer) : Answer(Answer) {}
+
+  T Answer;
+};
+
+template <typename T> Foo<T> makeFoo(T &&t) { return Foo<T>(std::move(t)); }
+
+void DbiModuleDescriptorBuilder::finalize() {
+  Layout.SC.ModuleIndex = Layout.Mod;
+  Layout.FileNameOffs = 0; // TODO: Fix this
+  Layout.Flags = 0;        // TODO: Fix this
+  Layout.C11Bytes = 0;
+  Layout.C13Bytes = calculateC13DebugInfoSize();
+  (void)Layout.Mod;         // Set in constructor
+  (void)Layout.ModDiStream; // Set in finalizeMsfLayout
+  Layout.NumFiles = SourceFiles.size();
+  Layout.PdbFilePathNI = PdbFilePathNI;
+  Layout.SrcFileNameNI = 0;
+
+  // This value includes both the signature field as well as the record bytes
+  // from the symbol stream.
+  Layout.SymBytes = SymbolByteSize + sizeof(uint32_t);
+}
+
+Error DbiModuleDescriptorBuilder::finalizeMsfLayout() {
+  this->Layout.ModDiStream = kInvalidStreamIndex;
+  uint32_t C13Size = calculateC13DebugInfoSize();
+  auto ExpectedSN =
+      MSF.addStream(calculateDiSymbolStreamSize(SymbolByteSize, C13Size));
+  if (!ExpectedSN)
+    return ExpectedSN.takeError();
+  Layout.ModDiStream = *ExpectedSN;
+  return Error::success();
+}
+
+Error DbiModuleDescriptorBuilder::commit(BinaryStreamWriter &ModiWriter,
+                                         const msf::MSFLayout &MsfLayout,
+                                         WritableBinaryStreamRef MsfBuffer) {
+  // We write the Modi record to the `ModiWriter`, but we additionally write its
+  // symbol stream to a brand new stream.
+  if (auto EC = ModiWriter.writeObject(Layout))
+    return EC;
+  if (auto EC = ModiWriter.writeCString(ModuleName))
+    return EC;
+  if (auto EC = ModiWriter.writeCString(ObjFileName))
+    return EC;
+  if (auto EC = ModiWriter.padToAlignment(sizeof(uint32_t)))
+    return EC;
+
+  if (Layout.ModDiStream != kInvalidStreamIndex) {
+    auto NS = WritableMappedBlockStream::createIndexedStream(
+        MsfLayout, MsfBuffer, Layout.ModDiStream, MSF.getAllocator());
+    WritableBinaryStreamRef Ref(*NS);
+    BinaryStreamWriter SymbolWriter(Ref);
+    // Write the symbols.
+    if (auto EC =
+            SymbolWriter.writeInteger<uint32_t>(COFF::DEBUG_SECTION_MAGIC))
+      return EC;
+    BinaryItemStream<CVSymbol> Records(llvm::support::endianness::little);
+    Records.setItems(Symbols);
+    BinaryStreamRef RecordsRef(Records);
+    if (auto EC = SymbolWriter.writeStreamRef(RecordsRef))
+      return EC;
+    if (auto EC = SymbolWriter.padToAlignment(4))
+      return EC;
+    // TODO: Write C11 Line data
+    assert(SymbolWriter.getOffset() % alignOf(CodeViewContainer::Pdb) == 0 &&
+           "Invalid debug section alignment!");
+    for (const auto &Builder : C13Builders) {
+      assert(Builder && "Empty C13 Fragment Builder!");
+      if (auto EC = Builder->commit(SymbolWriter))
+        return EC;
+    }
+
+    // TODO: Figure out what GlobalRefs substream actually is and populate it.
+    if (auto EC = SymbolWriter.writeInteger<uint32_t>(0))
+      return EC;
+    if (SymbolWriter.bytesRemaining() > 0)
+      return make_error<RawError>(raw_error_code::stream_too_long);
+  }
+  return Error::success();
+}
+
+void DbiModuleDescriptorBuilder::addDebugSubsection(
+    std::shared_ptr<DebugSubsection> Subsection) {
+  assert(Subsection);
+  C13Builders.push_back(llvm::make_unique<DebugSubsectionRecordBuilder>(
+      std::move(Subsection), CodeViewContainer::Pdb));
+}
+
+void DbiModuleDescriptorBuilder::addDebugSubsection(
+    const DebugSubsectionRecord &SubsectionContents) {
+  C13Builders.push_back(llvm::make_unique<DebugSubsectionRecordBuilder>(
+      SubsectionContents, CodeViewContainer::Pdb));
+}
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Native/DbiModuleList.cpp b/contrib/llvm/lib/DebugInfo/PDB/Native/DbiModuleList.cpp
new file mode 100644
index 0000000..eea70b2
--- /dev/null
+++ b/contrib/llvm/lib/DebugInfo/PDB/Native/DbiModuleList.cpp
@@ -0,0 +1,280 @@
+//===- DbiModuleList.cpp - PDB module information list --------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/PDB/Native/DbiModuleList.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/iterator_range.h"
+#include "llvm/DebugInfo/PDB/Native/RawError.h"
+#include "llvm/Support/BinaryStreamReader.h"
+#include "llvm/Support/Error.h"
+#include <algorithm>
+#include <cassert>
+#include <cstddef>
+#include <cstdint>
+
+using namespace llvm;
+using namespace llvm::pdb;
+
+DbiModuleSourceFilesIterator::DbiModuleSourceFilesIterator(
+    const DbiModuleList &Modules, uint32_t Modi, uint16_t Filei)
+    : Modules(&Modules), Modi(Modi), Filei(Filei) {
+  setValue();
+}
+
+bool DbiModuleSourceFilesIterator::
+operator==(const DbiModuleSourceFilesIterator &R) const {
+  // incompatible iterators are never equal
+  if (!isCompatible(R))
+    return false;
+
+  // If they're compatible, and they're both ends, then they're equal.
+  if (isEnd() && R.isEnd())
+    return true;
+
+  // If one is an end and the other is not, they're not equal.
+  if (isEnd() != R.isEnd())
+    return false;
+
+  // Now we know:
+  // - They're compatible
+  // - They're not *both* end iterators
+  // - Their endness is the same.
+  // Thus, they're compatible iterators pointing to a valid file on the same
+  // module.  All we need to check are the file indices.
+  assert(Modules == R.Modules);
+  assert(Modi == R.Modi);
+  assert(!isEnd());
+  assert(!R.isEnd());
+
+  return (Filei == R.Filei);
+}
+
+bool DbiModuleSourceFilesIterator::
+operator<(const DbiModuleSourceFilesIterator &R) const {
+  assert(isCompatible(R));
+
+  // It's not sufficient to compare the file indices, because default
+  // constructed iterators could be equal to iterators with valid indices.  To
+  // account for this, early-out if they're equal.
+  if (*this == R)
+    return false;
+
+  return Filei < R.Filei;
+}
+
+std::ptrdiff_t DbiModuleSourceFilesIterator::
+operator-(const DbiModuleSourceFilesIterator &R) const {
+  assert(isCompatible(R));
+  assert(!(*this < R));
+
+  // If they're both end iterators, the distance is 0.
+  if (isEnd() && R.isEnd())
+    return 0;
+
+  assert(!R.isEnd());
+
+  // At this point, R cannot be end, but *this can, which means that *this
+  // might be a universal end iterator with none of its fields set.  So in that
+  // case have to rely on R as the authority to figure out how many files there
+  // are to compute the distance.
+  uint32_t Thisi = Filei;
+  if (isEnd()) {
+    uint32_t RealModi = R.Modi;
+    Thisi = R.Modules->getSourceFileCount(RealModi);
+  }
+
+  assert(Thisi >= R.Filei);
+  return Thisi - R.Filei;
+}
+
+DbiModuleSourceFilesIterator &DbiModuleSourceFilesIterator::
+operator+=(std::ptrdiff_t N) {
+  assert(!isEnd());
+
+  Filei += N;
+  assert(Filei <= Modules->getSourceFileCount(Modi));
+  setValue();
+  return *this;
+}
+
+DbiModuleSourceFilesIterator &DbiModuleSourceFilesIterator::
+operator-=(std::ptrdiff_t N) {
+  // Note that we can subtract from an end iterator, but not a universal end
+  // iterator.
+  assert(!isUniversalEnd());
+
+  assert(N <= Filei);
+
+  Filei -= N;
+  return *this;
+}
+
+void DbiModuleSourceFilesIterator::setValue() {
+  if (isEnd()) {
+    ThisValue = "";
+    return;
+  }
+
+  uint32_t Off = Modules->ModuleInitialFileIndex[Modi] + Filei;
+  auto ExpectedValue = Modules->getFileName(Off);
+  if (!ExpectedValue) {
+    consumeError(ExpectedValue.takeError());
+    Filei = Modules->getSourceFileCount(Modi);
+  } else
+    ThisValue = *ExpectedValue;
+}
+
+bool DbiModuleSourceFilesIterator::isEnd() const {
+  if (isUniversalEnd())
+    return true;
+
+  assert(Modules);
+  assert(Modi <= Modules->getModuleCount());
+  assert(Filei <= Modules->getSourceFileCount(Modi));
+
+  if (Modi == Modules->getModuleCount())
+    return true;
+  if (Filei == Modules->getSourceFileCount(Modi))
+    return true;
+  return false;
+}
+
+bool DbiModuleSourceFilesIterator::isUniversalEnd() const { return !Modules; }
+
+bool DbiModuleSourceFilesIterator::isCompatible(
+    const DbiModuleSourceFilesIterator &R) const {
+  // Universal iterators are compatible with any other iterator.
+  if (isUniversalEnd() || R.isUniversalEnd())
+    return true;
+
+  // At this point, neither iterator is a universal end iterator, although one
+  // or both might be non-universal end iterators.  Regardless, the module index
+  // is valid, so they are compatible if and only if they refer to the same
+  // module.
+  return Modi == R.Modi;
+}
+
+Error DbiModuleList::initialize(BinaryStreamRef ModInfo,
+                                BinaryStreamRef FileInfo) {
+  if (auto EC = initializeModInfo(ModInfo))
+    return EC;
+  if (auto EC = initializeFileInfo(FileInfo))
+    return EC;
+
+  return Error::success();
+}
+
+Error DbiModuleList::initializeModInfo(BinaryStreamRef ModInfo) {
+  ModInfoSubstream = ModInfo;
+
+  if (ModInfo.getLength() == 0)
+    return Error::success();
+
+  BinaryStreamReader Reader(ModInfo);
+
+  if (auto EC = Reader.readArray(Descriptors, ModInfo.getLength()))
+    return EC;
+
+  return Error::success();
+}
+
+Error DbiModuleList::initializeFileInfo(BinaryStreamRef FileInfo) {
+  FileInfoSubstream = FileInfo;
+
+  if (FileInfo.getLength() == 0)
+    return Error::success();
+
+  BinaryStreamReader FISR(FileInfo);
+  if (auto EC = FISR.readObject(FileInfoHeader))
+    return EC;
+
+  // First is an array of `NumModules` module indices.  This does not seem to be
+  // used for anything meaningful, so we ignore it.
+  FixedStreamArray<support::ulittle16_t> ModuleIndices;
+  if (auto EC = FISR.readArray(ModuleIndices, FileInfoHeader->NumModules))
+    return EC;
+  if (auto EC = FISR.readArray(ModFileCountArray, FileInfoHeader->NumModules))
+    return EC;
+
+  // Compute the real number of source files.  We can't trust the value in
+  // `FileInfoHeader->NumSourceFiles` because it is a unit16, and the sum of all
+  // source file counts might be larger than a unit16.  So we compute the real
+  // count by summing up the individual counts.
+  uint32_t NumSourceFiles = 0;
+  for (auto Count : ModFileCountArray)
+    NumSourceFiles += Count;
+
+  // In the reference implementation, this array is where the pointer documented
+  // at the definition of ModuleInfoHeader::FileNameOffs points to.  Note that
+  // although the field in ModuleInfoHeader is ignored this array is not, as it
+  // is the authority on where each filename begins in the names buffer.
+  if (auto EC = FISR.readArray(FileNameOffsets, NumSourceFiles))
+    return EC;
+
+  if (auto EC = FISR.readStreamRef(NamesBuffer))
+    return EC;
+
+  auto DescriptorIter = Descriptors.begin();
+  uint32_t NextFileIndex = 0;
+  ModuleInitialFileIndex.resize(FileInfoHeader->NumModules);
+  ModuleDescriptorOffsets.resize(FileInfoHeader->NumModules);
+  for (size_t I = 0; I < FileInfoHeader->NumModules; ++I) {
+    assert(DescriptorIter != Descriptors.end());
+    ModuleInitialFileIndex[I] = NextFileIndex;
+    ModuleDescriptorOffsets[I] = DescriptorIter.offset();
+
+    NextFileIndex += ModFileCountArray[I];
+    ++DescriptorIter;
+  }
+
+  assert(DescriptorIter == Descriptors.end());
+  assert(NextFileIndex == NumSourceFiles);
+
+  return Error::success();
+}
+
+uint32_t DbiModuleList::getModuleCount() const {
+  return FileInfoHeader->NumModules;
+}
+
+uint32_t DbiModuleList::getSourceFileCount() const {
+  return FileNameOffsets.size();
+}
+
+uint16_t DbiModuleList::getSourceFileCount(uint32_t Modi) const {
+  return ModFileCountArray[Modi];
+}
+
+DbiModuleDescriptor DbiModuleList::getModuleDescriptor(uint32_t Modi) const {
+  assert(Modi < getModuleCount());
+  uint32_t Offset = ModuleDescriptorOffsets[Modi];
+  auto Iter = Descriptors.at(Offset);
+  assert(Iter != Descriptors.end());
+  return *Iter;
+}
+
+iterator_range<DbiModuleSourceFilesIterator>
+DbiModuleList::source_files(uint32_t Modi) const {
+  return make_range<DbiModuleSourceFilesIterator>(
+      DbiModuleSourceFilesIterator(*this, Modi, 0),
+      DbiModuleSourceFilesIterator());
+}
+
+Expected<StringRef> DbiModuleList::getFileName(uint32_t Index) const {
+  BinaryStreamReader Names(NamesBuffer);
+  if (Index >= getSourceFileCount())
+    return make_error<RawError>(raw_error_code::index_out_of_bounds);
+
+  uint32_t FileOffset = FileNameOffsets[Index];
+  Names.setOffset(FileOffset);
+  StringRef Name;
+  if (auto EC = Names.readCString(Name))
+    return std::move(EC);
+  return Name;
+}
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Raw/DbiStream.cpp b/contrib/llvm/lib/DebugInfo/PDB/Native/DbiStream.cpp
index 4f4a0cf..0eeac7e 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/Raw/DbiStream.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/Native/DbiStream.cpp
@@ -7,21 +7,20 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "llvm/DebugInfo/PDB/Native/DbiStream.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/DebugInfo/MSF/MappedBlockStream.h"
-#include "llvm/DebugInfo/MSF/StreamArray.h"
-#include "llvm/DebugInfo/MSF/StreamReader.h"
+#include "llvm/DebugInfo/PDB/Native/DbiModuleDescriptor.h"
+#include "llvm/DebugInfo/PDB/Native/ISectionContribVisitor.h"
+#include "llvm/DebugInfo/PDB/Native/InfoStream.h"
+#include "llvm/DebugInfo/PDB/Native/PDBFile.h"
+#include "llvm/DebugInfo/PDB/Native/RawConstants.h"
+#include "llvm/DebugInfo/PDB/Native/RawError.h"
+#include "llvm/DebugInfo/PDB/Native/RawTypes.h"
 #include "llvm/DebugInfo/PDB/PDBTypes.h"
-#include "llvm/DebugInfo/PDB/Raw/DbiStream.h"
-#include "llvm/DebugInfo/PDB/Raw/ISectionContribVisitor.h"
-#include "llvm/DebugInfo/PDB/Raw/InfoStream.h"
-#include "llvm/DebugInfo/PDB/Raw/ModInfo.h"
-#include "llvm/DebugInfo/PDB/Raw/NameHashTable.h"
-#include "llvm/DebugInfo/PDB/Raw/PDBFile.h"
-#include "llvm/DebugInfo/PDB/Raw/RawConstants.h"
-#include "llvm/DebugInfo/PDB/Raw/RawError.h"
-#include "llvm/DebugInfo/PDB/Raw/RawTypes.h"
 #include "llvm/Object/COFF.h"
+#include "llvm/Support/BinaryStreamArray.h"
+#include "llvm/Support/BinaryStreamReader.h"
 #include "llvm/Support/Error.h"
 #include <algorithm>
 #include <cstddef>
@@ -35,7 +34,7 @@ using namespace llvm::support;
 
 template <typename ContribType>
 static Error loadSectionContribs(FixedStreamArray<ContribType> &Output,
-                                 StreamReader &Reader) {
+                                 BinaryStreamReader &Reader) {
   if (Reader.bytesRemaining() % sizeof(ContribType) != 0)
     return make_error<RawError>(
         raw_error_code::corrupt_file,
@@ -48,13 +47,12 @@ static Error loadSectionContribs(FixedStreamArray<ContribType> &Output,
 }
 
 DbiStream::DbiStream(PDBFile &File, std::unique_ptr<MappedBlockStream> Stream)
-    : Pdb(File), Stream(std::move(Stream)), Header(nullptr) {
-}
+    : Pdb(File), Stream(std::move(Stream)), Header(nullptr) {}
 
 DbiStream::~DbiStream() = default;
 
 Error DbiStream::reload() {
-  StreamReader Reader(*Stream);
+  BinaryStreamReader Reader(*Stream);
 
   if (Stream->getLength() < sizeof(DbiStreamHeader))
     return make_error<RawError>(raw_error_code::corrupt_file,
@@ -74,14 +72,6 @@ Error DbiStream::reload() {
     return make_error<RawError>(raw_error_code::feature_unsupported,
                                 "Unsupported DBI version.");
 
-  auto IS = Pdb.getPDBInfoStream();
-  if (!IS)
-    return IS.takeError();
-
-  if (Header->Age != IS->getAge())
-    return make_error<RawError>(raw_error_code::corrupt_file,
-                                "DBI Age does not match PDB Age.");
-
   if (Stream->getLength() !=
       sizeof(DbiStreamHeader) + Header->ModiSubstreamSize +
           Header->SecContrSubstreamSize + Header->SectionMapSize +
@@ -109,26 +99,27 @@ Error DbiStream::reload() {
     return make_error<RawError>(raw_error_code::corrupt_file,
                                 "DBI type server substream not aligned.");
 
-  if (auto EC =
-          Reader.readStreamRef(ModInfoSubstream, Header->ModiSubstreamSize))
-    return EC;
-  if (auto EC = initializeModInfoArray())
+  if (auto EC = Reader.readSubstream(ModiSubstream, Header->ModiSubstreamSize))
     return EC;
 
-  if (auto EC = Reader.readStreamRef(SecContrSubstream,
+  if (auto EC = Reader.readSubstream(SecContrSubstream,
                                      Header->SecContrSubstreamSize))
     return EC;
-  if (auto EC = Reader.readStreamRef(SecMapSubstream, Header->SectionMapSize))
+  if (auto EC = Reader.readSubstream(SecMapSubstream, Header->SectionMapSize))
     return EC;
-  if (auto EC = Reader.readStreamRef(FileInfoSubstream, Header->FileInfoSize))
+  if (auto EC = Reader.readSubstream(FileInfoSubstream, Header->FileInfoSize))
     return EC;
   if (auto EC =
-          Reader.readStreamRef(TypeServerMapSubstream, Header->TypeServerSize))
+          Reader.readSubstream(TypeServerMapSubstream, Header->TypeServerSize))
     return EC;
-  if (auto EC = Reader.readStreamRef(ECSubstream, Header->ECSubstreamSize))
+  if (auto EC = Reader.readSubstream(ECSubstream, Header->ECSubstreamSize))
     return EC;
-  if (auto EC = Reader.readArray(DbgStreams, Header->OptionalDbgHdrSize /
-                                                 sizeof(ulittle16_t)))
+  if (auto EC = Reader.readArray(
+          DbgStreams, Header->OptionalDbgHdrSize / sizeof(ulittle16_t)))
+    return EC;
+
+  if (auto EC = Modules.initialize(ModiSubstream.StreamData,
+                                   FileInfoSubstream.StreamData))
     return EC;
 
   if (auto EC = initializeSectionContributionData())
@@ -137,8 +128,6 @@ Error DbiStream::reload() {
     return EC;
   if (auto EC = initializeSectionMapData())
     return EC;
-  if (auto EC = initializeFileInfo())
-    return EC;
   if (auto EC = initializeFpoRecords())
     return EC;
 
@@ -146,9 +135,9 @@ Error DbiStream::reload() {
     return make_error<RawError>(raw_error_code::corrupt_file,
                                 "Found unexpected bytes in DBI Stream.");
 
-  if (ECSubstream.getLength() > 0) {
-    StreamReader ECReader(ECSubstream);
-    if (auto EC = ECNames.load(ECReader))
+  if (!ECSubstream.empty()) {
+    BinaryStreamReader ECReader(ECSubstream.StreamData);
+    if (auto EC = ECNames.reload(ECReader))
       return EC;
   }
 
@@ -209,35 +198,42 @@ PDB_Machine DbiStream::getMachineType() const {
   return static_cast<PDB_Machine>(Machine);
 }
 
-msf::FixedStreamArray<object::coff_section> DbiStream::getSectionHeaders() {
+FixedStreamArray<object::coff_section> DbiStream::getSectionHeaders() {
   return SectionHeaders;
 }
 
-msf::FixedStreamArray<object::FpoData> DbiStream::getFpoRecords() {
+FixedStreamArray<object::FpoData> DbiStream::getFpoRecords() {
   return FpoRecords;
 }
 
-ArrayRef<ModuleInfoEx> DbiStream::modules() const { return ModuleInfos; }
-msf::FixedStreamArray<SecMapEntry> DbiStream::getSectionMap() const {
+const DbiModuleList &DbiStream::modules() const { return Modules; }
+
+FixedStreamArray<SecMapEntry> DbiStream::getSectionMap() const {
   return SectionMap;
 }
 
 void DbiStream::visitSectionContributions(
     ISectionContribVisitor &Visitor) const {
-  if (SectionContribVersion == DbiSecContribVer60) {
+  if (!SectionContribs.empty()) {
+    assert(SectionContribVersion == DbiSecContribVer60);
     for (auto &SC : SectionContribs)
       Visitor.visit(SC);
-  } else if (SectionContribVersion == DbiSecContribV2) {
+  } else if (!SectionContribs2.empty()) {
+    assert(SectionContribVersion == DbiSecContribV2);
     for (auto &SC : SectionContribs2)
       Visitor.visit(SC);
   }
 }
 
+Expected<StringRef> DbiStream::getECName(uint32_t NI) const {
+  return ECNames.getStringForID(NI);
+}
+
 Error DbiStream::initializeSectionContributionData() {
-  if (SecContrSubstream.getLength() == 0)
+  if (SecContrSubstream.empty())
     return Error::success();
 
-  StreamReader SCReader(SecContrSubstream);
+  BinaryStreamReader SCReader(SecContrSubstream.StreamData);
   if (auto EC = SCReader.readEnum(SectionContribVersion))
     return EC;
 
@@ -250,35 +246,20 @@ Error DbiStream::initializeSectionContributionData() {
                               "Unsupported DBI Section Contribution version");
 }
 
-Error DbiStream::initializeModInfoArray() {
-  if (ModInfoSubstream.getLength() == 0)
-    return Error::success();
-
-  // Since each ModInfo in the stream is a variable length, we have to iterate
-  // them to know how many there actually are.
-  StreamReader Reader(ModInfoSubstream);
-
-  VarStreamArray<ModInfo> ModInfoArray;
-  if (auto EC = Reader.readArray(ModInfoArray, ModInfoSubstream.getLength()))
-    return EC;
-  for (auto &Info : ModInfoArray) {
-    ModuleInfos.emplace_back(Info);
-  }
-
-  return Error::success();
-}
-
 // Initializes this->SectionHeaders.
 Error DbiStream::initializeSectionHeadersData() {
   if (DbgStreams.size() == 0)
     return Error::success();
 
   uint32_t StreamNum = getDebugStreamIndex(DbgHeaderType::SectionHdr);
+  if (StreamNum == kInvalidStreamIndex)
+    return Error::success();
+
   if (StreamNum >= Pdb.getNumStreams())
     return make_error<RawError>(raw_error_code::no_stream);
 
   auto SHS = MappedBlockStream::createIndexedStream(
-      Pdb.getMsfLayout(), Pdb.getMsfBuffer(), StreamNum);
+      Pdb.getMsfLayout(), Pdb.getMsfBuffer(), StreamNum, Pdb.getAllocator());
 
   size_t StreamLen = SHS->getLength();
   if (StreamLen % sizeof(object::coff_section))
@@ -286,7 +267,7 @@ Error DbiStream::initializeSectionHeadersData() {
                                 "Corrupted section header stream.");
 
   size_t NumSections = StreamLen / sizeof(object::coff_section);
-  msf::StreamReader Reader(*SHS);
+  BinaryStreamReader Reader(*SHS);
   if (auto EC = Reader.readArray(SectionHeaders, NumSections))
     return make_error<RawError>(raw_error_code::corrupt_file,
                                 "Could not read a bitmap.");
@@ -310,7 +291,7 @@ Error DbiStream::initializeFpoRecords() {
     return make_error<RawError>(raw_error_code::no_stream);
 
   auto FS = MappedBlockStream::createIndexedStream(
-      Pdb.getMsfLayout(), Pdb.getMsfBuffer(), StreamNum);
+      Pdb.getMsfLayout(), Pdb.getMsfBuffer(), StreamNum, Pdb.getAllocator());
 
   size_t StreamLen = FS->getLength();
   if (StreamLen % sizeof(object::FpoData))
@@ -318,7 +299,7 @@ Error DbiStream::initializeFpoRecords() {
                                 "Corrupted New FPO stream.");
 
   size_t NumRecords = StreamLen / sizeof(object::FpoData);
-  msf::StreamReader Reader(*FS);
+  BinaryStreamReader Reader(*FS);
   if (auto EC = Reader.readArray(FpoRecords, NumRecords))
     return make_error<RawError>(raw_error_code::corrupt_file,
                                 "Corrupted New FPO stream.");
@@ -326,82 +307,38 @@ Error DbiStream::initializeFpoRecords() {
   return Error::success();
 }
 
-Error DbiStream::initializeSectionMapData() {
-  if (SecMapSubstream.getLength() == 0)
-    return Error::success();
+BinarySubstreamRef DbiStream::getSectionContributionData() const {
+  return SecContrSubstream;
+}
 
-  StreamReader SMReader(SecMapSubstream);
-  const SecMapHeader *Header;
-  if (auto EC = SMReader.readObject(Header))
-    return EC;
-  if (auto EC = SMReader.readArray(SectionMap, Header->SecCount))
-    return EC;
-  return Error::success();
+BinarySubstreamRef DbiStream::getSecMapSubstreamData() const {
+  return SecMapSubstream;
 }
 
-Error DbiStream::initializeFileInfo() {
-  if (FileInfoSubstream.getLength() == 0)
-    return Error::success();
+BinarySubstreamRef DbiStream::getModiSubstreamData() const {
+  return ModiSubstream;
+}
 
-  const FileInfoSubstreamHeader *FH;
-  StreamReader FISR(FileInfoSubstream);
-  if (auto EC = FISR.readObject(FH))
-    return EC;
+BinarySubstreamRef DbiStream::getFileInfoSubstreamData() const {
+  return FileInfoSubstream;
+}
 
-  // The number of modules in the stream should be the same as reported by
-  // the FileInfoSubstreamHeader.
-  if (FH->NumModules != ModuleInfos.size())
-    return make_error<RawError>(raw_error_code::corrupt_file,
-                                "FileInfo substream count doesn't match DBI.");
+BinarySubstreamRef DbiStream::getTypeServerMapSubstreamData() const {
+  return TypeServerMapSubstream;
+}
 
-  FixedStreamArray<ulittle16_t> ModIndexArray;
-  FixedStreamArray<ulittle16_t> ModFileCountArray;
+BinarySubstreamRef DbiStream::getECSubstreamData() const { return ECSubstream; }
 
-  // First is an array of `NumModules` module indices.  This is not used for the
-  // same reason that `NumSourceFiles` is not used.  It's an array of uint16's,
-  // but it's possible there are more than 64k source files, which would imply
-  // more than 64k modules (e.g. object files) as well.  So we ignore this
-  // field.
-  if (auto EC = FISR.readArray(ModIndexArray, ModuleInfos.size()))
-    return EC;
-  if (auto EC = FISR.readArray(ModFileCountArray, ModuleInfos.size()))
-    return EC;
+Error DbiStream::initializeSectionMapData() {
+  if (SecMapSubstream.empty())
+    return Error::success();
 
-  // Compute the real number of source files.
-  uint32_t NumSourceFiles = 0;
-  for (auto Count : ModFileCountArray)
-    NumSourceFiles += Count;
-
-  // This is the array that in the reference implementation corresponds to
-  // `ModInfo::FileLayout::FileNameOffs`, which is commented there as being a
-  // pointer. Due to the mentioned problems of pointers causing difficulty
-  // when reading from the file on 64-bit systems, we continue to ignore that
-  // field in `ModInfo`, and instead build a vector of StringRefs and stores
-  // them in `ModuleInfoEx`.  The value written to and read from the file is
-  // not used anyway, it is only there as a way to store the offsets for the
-  // purposes of later accessing the names at runtime.
-  if (auto EC = FISR.readArray(FileNameOffsets, NumSourceFiles))
+  BinaryStreamReader SMReader(SecMapSubstream.StreamData);
+  const SecMapHeader *Header;
+  if (auto EC = SMReader.readObject(Header))
     return EC;
-
-  if (auto EC = FISR.readStreamRef(NamesBuffer))
+  if (auto EC = SMReader.readArray(SectionMap, Header->SecCount))
     return EC;
-
-  // We go through each ModuleInfo, determine the number N of source files for
-  // that module, and then get the next N offsets from the Offsets array, using
-  // them to get the corresponding N names from the Names buffer and associating
-  // each one with the corresponding module.
-  uint32_t NextFileIndex = 0;
-  for (size_t I = 0; I < ModuleInfos.size(); ++I) {
-    uint32_t NumFiles = ModFileCountArray[I];
-    ModuleInfos[I].SourceFiles.resize(NumFiles);
-    for (size_t J = 0; J < NumFiles; ++J, ++NextFileIndex) {
-      auto ThisName = getFileNameForIndex(NextFileIndex);
-      if (!ThisName)
-        return ThisName.takeError();
-      ModuleInfos[I].SourceFiles[J] = *ThisName;
-    }
-  }
-
   return Error::success();
 }
 
@@ -411,16 +348,3 @@ uint32_t DbiStream::getDebugStreamIndex(DbgHeaderType Type) const {
     return kInvalidStreamIndex;
   return DbgStreams[T];
 }
-
-Expected<StringRef> DbiStream::getFileNameForIndex(uint32_t Index) const {
-  StreamReader Names(NamesBuffer);
-  if (Index >= FileNameOffsets.size())
-    return make_error<RawError>(raw_error_code::index_out_of_bounds);
-
-  uint32_t FileOffset = FileNameOffsets[Index];
-  Names.setOffset(FileOffset);
-  StringRef Name;
-  if (auto EC = Names.readZeroString(Name))
-    return std::move(EC);
-  return Name;
-}
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Raw/DbiStreamBuilder.cpp b/contrib/llvm/lib/DebugInfo/PDB/Native/DbiStreamBuilder.cpp
index 1d5b8d6..25076e4 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/Raw/DbiStreamBuilder.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/Native/DbiStreamBuilder.cpp
@@ -7,31 +7,30 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "llvm/DebugInfo/PDB/Raw/DbiStreamBuilder.h"
+#include "llvm/DebugInfo/PDB/Native/DbiStreamBuilder.h"
 
 #include "llvm/ADT/ArrayRef.h"
+#include "llvm/BinaryFormat/COFF.h"
 #include "llvm/DebugInfo/MSF/MSFBuilder.h"
 #include "llvm/DebugInfo/MSF/MappedBlockStream.h"
-#include "llvm/DebugInfo/MSF/StreamWriter.h"
-#include "llvm/DebugInfo/PDB/Raw/DbiStream.h"
-#include "llvm/DebugInfo/PDB/Raw/RawError.h"
+#include "llvm/DebugInfo/PDB/Native/DbiModuleDescriptorBuilder.h"
+#include "llvm/DebugInfo/PDB/Native/DbiStream.h"
+#include "llvm/DebugInfo/PDB/Native/RawError.h"
 #include "llvm/Object/COFF.h"
-#include "llvm/Support/COFF.h"
+#include "llvm/Support/BinaryStreamWriter.h"
 
 using namespace llvm;
 using namespace llvm::codeview;
 using namespace llvm::msf;
 using namespace llvm::pdb;
 
-namespace {
-class ModiSubstreamBuilder {};
-}
-
 DbiStreamBuilder::DbiStreamBuilder(msf::MSFBuilder &Msf)
     : Msf(Msf), Allocator(Msf.getAllocator()), Age(1), BuildNumber(0),
       PdbDllVersion(0), PdbDllRbld(0), Flags(0), MachineType(PDB_Machine::x86),
       Header(nullptr), DbgStreams((int)DbgHeaderType::Max) {}
 
+DbiStreamBuilder::~DbiStreamBuilder() {}
+
 void DbiStreamBuilder::setVersionHeader(PdbRaw_DbiVer V) { VerHeader = V; }
 
 void DbiStreamBuilder::setAge(uint32_t A) { Age = A; }
@@ -46,17 +45,21 @@ void DbiStreamBuilder::setFlags(uint16_t F) { Flags = F; }
 
 void DbiStreamBuilder::setMachineType(PDB_Machine M) { MachineType = M; }
 
-void DbiStreamBuilder::setSectionContribs(ArrayRef<SectionContrib> Arr) {
-  SectionContribs = Arr;
-}
-
 void DbiStreamBuilder::setSectionMap(ArrayRef<SecMapEntry> SecMap) {
   SectionMap = SecMap;
 }
 
+void DbiStreamBuilder::setSymbolRecordStreamIndex(uint32_t Index) {
+  SymRecordStreamIndex = Index;
+}
+
+void DbiStreamBuilder::setPublicsStreamIndex(uint32_t Index) {
+  PublicsStreamIndex = Index;
+}
+
 Error DbiStreamBuilder::addDbgStream(pdb::DbgHeaderType Type,
                                      ArrayRef<uint8_t> Data) {
-  if (DbgStreams[(int)Type].StreamNumber)
+  if (DbgStreams[(int)Type].StreamNumber != kInvalidStreamIndex)
     return make_error<RawError>(raw_error_code::duplicate_entry,
                                 "The specified stream type already exists");
   auto ExpectedIndex = Msf.addStream(Data.size());
@@ -68,46 +71,62 @@ Error DbiStreamBuilder::addDbgStream(pdb::DbgHeaderType Type,
   return Error::success();
 }
 
+uint32_t DbiStreamBuilder::addECName(StringRef Name) {
+  return ECNamesBuilder.insert(Name);
+}
+
 uint32_t DbiStreamBuilder::calculateSerializedLength() const {
   // For now we only support serializing the header.
   return sizeof(DbiStreamHeader) + calculateFileInfoSubstreamSize() +
          calculateModiSubstreamSize() + calculateSectionContribsStreamSize() +
-         calculateSectionMapStreamSize() + calculateDbgStreamsSize();
+         calculateSectionMapStreamSize() + calculateDbgStreamsSize() +
+         ECNamesBuilder.calculateSerializedSize();
 }
 
-Error DbiStreamBuilder::addModuleInfo(StringRef ObjFile, StringRef Module) {
-  auto Entry = llvm::make_unique<ModuleInfo>();
-  ModuleInfo *M = Entry.get();
-  Entry->Mod = Module;
-  Entry->Obj = ObjFile;
-  auto Result = ModuleInfos.insert(std::make_pair(Module, std::move(Entry)));
+Expected<DbiModuleDescriptorBuilder &>
+DbiStreamBuilder::addModuleInfo(StringRef ModuleName) {
+  uint32_t Index = ModiList.size();
+  auto MIB =
+      llvm::make_unique<DbiModuleDescriptorBuilder>(ModuleName, Index, Msf);
+  auto M = MIB.get();
+  auto Result = ModiMap.insert(std::make_pair(ModuleName, std::move(MIB)));
+
   if (!Result.second)
     return make_error<RawError>(raw_error_code::duplicate_entry,
                                 "The specified module already exists");
-  ModuleInfoList.push_back(M);
-  return Error::success();
+  ModiList.push_back(M);
+  return *M;
 }
 
 Error DbiStreamBuilder::addModuleSourceFile(StringRef Module, StringRef File) {
-  auto ModIter = ModuleInfos.find(Module);
-  if (ModIter == ModuleInfos.end())
+  auto ModIter = ModiMap.find(Module);
+  if (ModIter == ModiMap.end())
     return make_error<RawError>(raw_error_code::no_entry,
                                 "The specified module was not found");
+  return addModuleSourceFile(*ModIter->second, File);
+}
+
+Error DbiStreamBuilder::addModuleSourceFile(DbiModuleDescriptorBuilder &Module,
+                                            StringRef File) {
   uint32_t Index = SourceFileNames.size();
   SourceFileNames.insert(std::make_pair(File, Index));
-  auto &ModEntry = *ModIter;
-  ModEntry.second->SourceFiles.push_back(File);
+  Module.addSourceFile(File);
   return Error::success();
 }
 
+Expected<uint32_t> DbiStreamBuilder::getSourceFileNameIndex(StringRef File) {
+  auto NameIter = SourceFileNames.find(File);
+  if (NameIter == SourceFileNames.end())
+    return make_error<RawError>(raw_error_code::no_entry,
+                                "The specified source file was not found");
+  return NameIter->getValue();
+}
+
 uint32_t DbiStreamBuilder::calculateModiSubstreamSize() const {
   uint32_t Size = 0;
-  for (const auto &M : ModuleInfoList) {
-    Size += sizeof(ModuleInfoHeader);
-    Size += M->Mod.size() + 1;
-    Size += M->Obj.size() + 1;
-  }
-  return alignTo(Size, sizeof(uint32_t));
+  for (const auto &M : ModiList)
+    Size += M->calculateSerializedLength();
+  return Size;
 }
 
 uint32_t DbiStreamBuilder::calculateSectionContribsStreamSize() const {
@@ -123,16 +142,21 @@ uint32_t DbiStreamBuilder::calculateSectionMapStreamSize() const {
   return sizeof(SecMapHeader) + sizeof(SecMapEntry) * SectionMap.size();
 }
 
-uint32_t DbiStreamBuilder::calculateFileInfoSubstreamSize() const {
-  uint32_t Size = 0;
-  Size += sizeof(ulittle16_t);                         // NumModules
-  Size += sizeof(ulittle16_t);                         // NumSourceFiles
-  Size += ModuleInfoList.size() * sizeof(ulittle16_t); // ModIndices
-  Size += ModuleInfoList.size() * sizeof(ulittle16_t); // ModFileCounts
+uint32_t DbiStreamBuilder::calculateNamesOffset() const {
+  uint32_t Offset = 0;
+  Offset += sizeof(ulittle16_t);                         // NumModules
+  Offset += sizeof(ulittle16_t);                         // NumSourceFiles
+  Offset += ModiList.size() * sizeof(ulittle16_t);       // ModIndices
+  Offset += ModiList.size() * sizeof(ulittle16_t);       // ModFileCounts
   uint32_t NumFileInfos = 0;
-  for (const auto &M : ModuleInfoList)
-    NumFileInfos += M->SourceFiles.size();
-  Size += NumFileInfos * sizeof(ulittle32_t); // FileNameOffsets
+  for (const auto &M : ModiList)
+    NumFileInfos += M->source_files().size();
+  Offset += NumFileInfos * sizeof(ulittle32_t); // FileNameOffsets
+  return Offset;
+}
+
+uint32_t DbiStreamBuilder::calculateFileInfoSubstreamSize() const {
+  uint32_t Size = calculateNamesOffset();
   Size += calculateNamesBufferSize();
   return alignTo(Size, sizeof(uint32_t));
 }
@@ -149,43 +173,19 @@ uint32_t DbiStreamBuilder::calculateDbgStreamsSize() const {
   return DbgStreams.size() * sizeof(uint16_t);
 }
 
-Error DbiStreamBuilder::generateModiSubstream() {
-  uint32_t Size = calculateModiSubstreamSize();
-  auto Data = Allocator.Allocate<uint8_t>(Size);
-
-  ModInfoBuffer = MutableByteStream(MutableArrayRef<uint8_t>(Data, Size));
-
-  StreamWriter ModiWriter(ModInfoBuffer);
-  for (const auto &M : ModuleInfoList) {
-    ModuleInfoHeader Layout = {};
-    Layout.ModDiStream = kInvalidStreamIndex;
-    Layout.NumFiles = M->SourceFiles.size();
-    if (auto EC = ModiWriter.writeObject(Layout))
-      return EC;
-    if (auto EC = ModiWriter.writeZeroString(M->Mod))
-      return EC;
-    if (auto EC = ModiWriter.writeZeroString(M->Obj))
-      return EC;
-  }
-  if (ModiWriter.bytesRemaining() > sizeof(uint32_t))
-    return make_error<RawError>(raw_error_code::invalid_format,
-                                "Unexpected bytes in Modi Stream Data");
-  return Error::success();
-}
-
 Error DbiStreamBuilder::generateFileInfoSubstream() {
   uint32_t Size = calculateFileInfoSubstreamSize();
-  uint32_t NameSize = calculateNamesBufferSize();
   auto Data = Allocator.Allocate<uint8_t>(Size);
-  uint32_t NamesOffset = Size - NameSize;
+  uint32_t NamesOffset = calculateNamesOffset();
 
-  FileInfoBuffer = MutableByteStream(MutableArrayRef<uint8_t>(Data, Size));
+  FileInfoBuffer = MutableBinaryByteStream(MutableArrayRef<uint8_t>(Data, Size),
+                                           llvm::support::little);
 
-  WritableStreamRef MetadataBuffer =
-      WritableStreamRef(FileInfoBuffer).keep_front(NamesOffset);
-  StreamWriter MetadataWriter(MetadataBuffer);
+  WritableBinaryStreamRef MetadataBuffer =
+      WritableBinaryStreamRef(FileInfoBuffer).keep_front(NamesOffset);
+  BinaryStreamWriter MetadataWriter(MetadataBuffer);
 
-  uint16_t ModiCount = std::min<uint32_t>(UINT16_MAX, ModuleInfos.size());
+  uint16_t ModiCount = std::min<uint32_t>(UINT16_MAX, ModiList.size());
   uint16_t FileCount = std::min<uint32_t>(UINT16_MAX, SourceFileNames.size());
   if (auto EC = MetadataWriter.writeInteger(ModiCount)) // NumModules
     return EC;
@@ -195,8 +195,8 @@ Error DbiStreamBuilder::generateFileInfoSubstream() {
     if (auto EC = MetadataWriter.writeInteger(I)) // Mod Indices
       return EC;
   }
-  for (const auto MI : ModuleInfoList) {
-    FileCount = static_cast<uint16_t>(MI->SourceFiles.size());
+  for (const auto &MI : ModiList) {
+    FileCount = static_cast<uint16_t>(MI->source_files().size());
     if (auto EC = MetadataWriter.writeInteger(FileCount)) // Mod File Counts
       return EC;
   }
@@ -205,16 +205,16 @@ Error DbiStreamBuilder::generateFileInfoSubstream() {
   // A side effect of this is that this will actually compute the various
   // file name offsets, so we can then go back and write the FileNameOffsets
   // array to the other substream.
-  NamesBuffer = WritableStreamRef(FileInfoBuffer).drop_front(NamesOffset);
-  StreamWriter NameBufferWriter(NamesBuffer);
+  NamesBuffer = WritableBinaryStreamRef(FileInfoBuffer).drop_front(NamesOffset);
+  BinaryStreamWriter NameBufferWriter(NamesBuffer);
   for (auto &Name : SourceFileNames) {
     Name.second = NameBufferWriter.getOffset();
-    if (auto EC = NameBufferWriter.writeZeroString(Name.getKey()))
+    if (auto EC = NameBufferWriter.writeCString(Name.getKey()))
       return EC;
   }
 
-  for (const auto MI : ModuleInfoList) {
-    for (StringRef Name : MI->SourceFiles) {
+  for (const auto &MI : ModiList) {
+    for (StringRef Name : MI->source_files()) {
       auto Result = SourceFileNames.find(Name);
       if (Result == SourceFileNames.end())
         return make_error<RawError>(raw_error_code::no_entry,
@@ -224,6 +224,9 @@ Error DbiStreamBuilder::generateFileInfoSubstream() {
     }
   }
 
+  if (auto EC = NameBufferWriter.padToAlignment(sizeof(uint32_t)))
+    return EC;
+
   if (NameBufferWriter.bytesRemaining() > 0)
     return make_error<RawError>(raw_error_code::invalid_format,
                                 "The names buffer contained unexpected data.");
@@ -240,13 +243,14 @@ Error DbiStreamBuilder::finalize() {
   if (Header)
     return Error::success();
 
-  DbiStreamHeader *H = Allocator.Allocate<DbiStreamHeader>();
+  for (auto &MI : ModiList)
+    MI->finalize();
 
-  if (auto EC = generateModiSubstream())
-    return EC;
   if (auto EC = generateFileInfoSubstream())
     return EC;
 
+  DbiStreamHeader *H = Allocator.Allocate<DbiStreamHeader>();
+  ::memset(H, 0, sizeof(DbiStreamHeader));
   H->VersionHeader = *VerHeader;
   H->VersionSignature = -1;
   H->Age = Age;
@@ -256,15 +260,15 @@ Error DbiStreamBuilder::finalize() {
   H->PdbDllVersion = PdbDllVersion;
   H->MachineType = static_cast<uint16_t>(MachineType);
 
-  H->ECSubstreamSize = 0;
+  H->ECSubstreamSize = ECNamesBuilder.calculateSerializedSize();
   H->FileInfoSize = FileInfoBuffer.getLength();
-  H->ModiSubstreamSize = ModInfoBuffer.getLength();
+  H->ModiSubstreamSize = calculateModiSubstreamSize();
   H->OptionalDbgHdrSize = DbgStreams.size() * sizeof(uint16_t);
   H->SecContrSubstreamSize = calculateSectionContribsStreamSize();
   H->SectionMapSize = calculateSectionMapStreamSize();
   H->TypeServerSize = 0;
-  H->SymRecordStreamIndex = kInvalidStreamIndex;
-  H->PublicSymbolStreamIndex = kInvalidStreamIndex;
+  H->SymRecordStreamIndex = SymRecordStreamIndex;
+  H->PublicSymbolStreamIndex = PublicsStreamIndex;
   H->MFCTypeServerIndex = kInvalidStreamIndex;
   H->GlobalSymbolStreamIndex = kInvalidStreamIndex;
 
@@ -273,6 +277,11 @@ Error DbiStreamBuilder::finalize() {
 }
 
 Error DbiStreamBuilder::finalizeMsfLayout() {
+  for (auto &MI : ModiList) {
+    if (auto EC = MI->finalizeMsfLayout())
+      return EC;
+  }
+
   uint32_t Length = calculateSerializedLength();
   if (auto EC = Msf.setStreamSize(StreamDBI, Length))
     return EC;
@@ -298,23 +307,17 @@ static uint16_t toSecMapFlags(uint32_t Flags) {
   return Ret;
 }
 
-// A utility function to create Section Contributions
-// for a given input sections.
-std::vector<SectionContrib> DbiStreamBuilder::createSectionContribs(
-    ArrayRef<object::coff_section> SecHdrs) {
-  std::vector<SectionContrib> Ret;
-
-  // Create a SectionContrib for each input section.
-  for (auto &Sec : SecHdrs) {
-    Ret.emplace_back();
-    auto &Entry = Ret.back();
-    memset(&Entry, 0, sizeof(Entry));
-
-    Entry.Off = Sec.PointerToRawData;
-    Entry.Size = Sec.SizeOfRawData;
-    Entry.Characteristics = Sec.Characteristics;
-  }
-  return Ret;
+void DbiStreamBuilder::addSectionContrib(DbiModuleDescriptorBuilder *ModuleDbi,
+                                         const object::coff_section *SecHdr) {
+  SectionContrib SC;
+  memset(&SC, 0, sizeof(SC));
+  SC.ISect = (uint16_t)~0U; // This represents nil.
+  SC.Off = SecHdr->PointerToRawData;
+  SC.Size = SecHdr->SizeOfRawData;
+  SC.Characteristics = SecHdr->Characteristics;
+  // Use the module index in the module dbi stream or nil (-1).
+  SC.Imod = ModuleDbi ? ModuleDbi->getModuleIndex() : (uint16_t)~0U;
+  SectionContribs.emplace_back(SC);
 }
 
 // A utility function to create a Section Map for a given list of COFF sections.
@@ -358,24 +361,26 @@ std::vector<SecMapEntry> DbiStreamBuilder::createSectionMap(
 }
 
 Error DbiStreamBuilder::commit(const msf::MSFLayout &Layout,
-                               const msf::WritableStream &Buffer) {
+                               WritableBinaryStreamRef MsfBuffer) {
   if (auto EC = finalize())
     return EC;
 
-  auto InfoS =
-      WritableMappedBlockStream::createIndexedStream(Layout, Buffer, StreamDBI);
+  auto DbiS = WritableMappedBlockStream::createIndexedStream(
+      Layout, MsfBuffer, StreamDBI, Allocator);
 
-  StreamWriter Writer(*InfoS);
+  BinaryStreamWriter Writer(*DbiS);
   if (auto EC = Writer.writeObject(*Header))
     return EC;
 
-  if (auto EC = Writer.writeStreamRef(ModInfoBuffer))
-    return EC;
+  for (auto &M : ModiList) {
+    if (auto EC = M->commit(Writer, Layout, MsfBuffer))
+      return EC;
+  }
 
   if (!SectionContribs.empty()) {
     if (auto EC = Writer.writeEnum(DbiSecContribVer60))
       return EC;
-    if (auto EC = Writer.writeArray(SectionContribs))
+    if (auto EC = Writer.writeArray(makeArrayRef(SectionContribs)))
       return EC;
   }
 
@@ -391,6 +396,9 @@ Error DbiStreamBuilder::commit(const msf::MSFLayout &Layout,
   if (auto EC = Writer.writeStreamRef(FileInfoBuffer))
     return EC;
 
+  if (auto EC = ECNamesBuilder.commit(Writer))
+    return EC;
+
   for (auto &Stream : DbgStreams)
     if (auto EC = Writer.writeInteger(Stream.StreamNumber))
       return EC;
@@ -399,8 +407,8 @@ Error DbiStreamBuilder::commit(const msf::MSFLayout &Layout,
     if (Stream.StreamNumber == kInvalidStreamIndex)
       continue;
     auto WritableStream = WritableMappedBlockStream::createIndexedStream(
-        Layout, Buffer, Stream.StreamNumber);
-    StreamWriter DbgStreamWriter(*WritableStream);
+        Layout, MsfBuffer, Stream.StreamNumber, Allocator);
+    BinaryStreamWriter DbgStreamWriter(*WritableStream);
     if (auto EC = DbgStreamWriter.writeArray(Stream.Data))
       return EC;
   }
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Raw/EnumTables.cpp b/contrib/llvm/lib/DebugInfo/PDB/Native/EnumTables.cpp
index fc9270c..b3837dc 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/Raw/EnumTables.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/Native/EnumTables.cpp
@@ -7,8 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "llvm/DebugInfo/PDB/Raw/EnumTables.h"
-#include "llvm/DebugInfo/PDB/Raw/RawConstants.h"
+#include "llvm/DebugInfo/PDB/Native/EnumTables.h"
+#include "llvm/DebugInfo/PDB/Native/RawConstants.h"
 
 using namespace llvm;
 using namespace llvm::pdb;
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Raw/GSI.cpp b/contrib/llvm/lib/DebugInfo/PDB/Native/GSI.cpp
index 6ecbb5c..b219fe2 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/Raw/GSI.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/Native/GSI.cpp
@@ -9,10 +9,10 @@
 
 #include "GSI.h"
 
-#include "llvm/DebugInfo/MSF/StreamArray.h"
-#include "llvm/DebugInfo/MSF/StreamReader.h"
-#include "llvm/DebugInfo/PDB/Raw/RawError.h"
-#include "llvm/DebugInfo/PDB/Raw/RawTypes.h"
+#include "llvm/DebugInfo/PDB/Native/RawError.h"
+#include "llvm/DebugInfo/PDB/Native/RawTypes.h"
+#include "llvm/Support/BinaryStreamArray.h"
+#include "llvm/Support/BinaryStreamReader.h"
 
 #include "llvm/Support/Error.h"
 
@@ -28,9 +28,9 @@ static Error checkHashHdrVersion(const GSIHashHeader *HashHdr) {
   return Error::success();
 }
 
-Error readGSIHashBuckets(
-    msf::FixedStreamArray<support::ulittle32_t> &HashBuckets,
-    const GSIHashHeader *HashHdr, msf::StreamReader &Reader) {
+Error readGSIHashBuckets(FixedStreamArray<support::ulittle32_t> &HashBuckets,
+                         const GSIHashHeader *HashHdr,
+                         BinaryStreamReader &Reader) {
   if (auto EC = checkHashHdrVersion(HashHdr))
     return EC;
 
@@ -57,7 +57,7 @@ Error readGSIHashBuckets(
 }
 
 Error readGSIHashHeader(const GSIHashHeader *&HashHdr,
-                        msf::StreamReader &Reader) {
+                        BinaryStreamReader &Reader) {
   if (Reader.readObject(HashHdr))
     return make_error<RawError>(raw_error_code::corrupt_file,
                                 "Stream does not contain a GSIHashHeader.");
@@ -70,9 +70,9 @@ Error readGSIHashHeader(const GSIHashHeader *&HashHdr,
   return Error::success();
 }
 
-Error readGSIHashRecords(msf::FixedStreamArray<PSHashRecord> &HashRecords,
+Error readGSIHashRecords(FixedStreamArray<PSHashRecord> &HashRecords,
                          const GSIHashHeader *HashHdr,
-                         msf::StreamReader &Reader) {
+                         BinaryStreamReader &Reader) {
   if (auto EC = checkHashHdrVersion(HashHdr))
     return EC;
 
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Raw/GSI.h b/contrib/llvm/lib/DebugInfo/PDB/Native/GSI.h
index 82cebd9..9e63bc8 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/Raw/GSI.h
+++ b/contrib/llvm/lib/DebugInfo/PDB/Native/GSI.h
@@ -25,17 +25,15 @@
 #ifndef LLVM_LIB_DEBUGINFO_PDB_RAW_GSI_H
 #define LLVM_LIB_DEBUGINFO_PDB_RAW_GSI_H
 
-#include "llvm/DebugInfo/MSF/StreamArray.h"
-#include "llvm/DebugInfo/PDB/Raw/RawTypes.h"
+#include "llvm/DebugInfo/PDB/Native/RawTypes.h"
+#include "llvm/Support/BinaryStreamArray.h"
 
 #include "llvm/Support/Endian.h"
 #include "llvm/Support/Error.h"
 
 namespace llvm {
 
-namespace msf {
-class StreamReader;
-}
+class BinaryStreamReader;
 
 namespace pdb {
 
@@ -56,14 +54,14 @@ struct GSIHashHeader {
   support::ulittle32_t NumBuckets;
 };
 
-Error readGSIHashBuckets(
-    msf::FixedStreamArray<support::ulittle32_t> &HashBuckets,
-    const GSIHashHeader *HashHdr, msf::StreamReader &Reader);
+Error readGSIHashBuckets(FixedStreamArray<support::ulittle32_t> &HashBuckets,
+                         const GSIHashHeader *HashHdr,
+                         BinaryStreamReader &Reader);
 Error readGSIHashHeader(const GSIHashHeader *&HashHdr,
-                        msf::StreamReader &Reader);
-Error readGSIHashRecords(msf::FixedStreamArray<PSHashRecord> &HashRecords,
+                        BinaryStreamReader &Reader);
+Error readGSIHashRecords(FixedStreamArray<PSHashRecord> &HashRecords,
                          const GSIHashHeader *HashHdr,
-                         msf::StreamReader &Reader);
+                         BinaryStreamReader &Reader);
 }
 }
 
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Raw/GlobalsStream.cpp b/contrib/llvm/lib/DebugInfo/PDB/Native/GlobalsStream.cpp
index 31afc92..a2ee0f0 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/Raw/GlobalsStream.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/Native/GlobalsStream.cpp
@@ -7,9 +7,9 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "llvm/DebugInfo/PDB/Native/GlobalsStream.h"
 #include "GSI.h"
-#include "llvm/DebugInfo/MSF/StreamReader.h"
-#include "llvm/DebugInfo/PDB/Raw/GlobalsStream.h"
+#include "llvm/Support/BinaryStreamReader.h"
 #include "llvm/Support/Error.h"
 #include <algorithm>
 
@@ -23,7 +23,7 @@ GlobalsStream::GlobalsStream(std::unique_ptr<MappedBlockStream> Stream)
 GlobalsStream::~GlobalsStream() = default;
 
 Error GlobalsStream::reload() {
-  StreamReader Reader(*Stream);
+  BinaryStreamReader Reader(*Stream);
 
   const GSIHashHeader *HashHdr;
   if (auto EC = readGSIHashHeader(HashHdr, Reader))
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Raw/Hash.cpp b/contrib/llvm/lib/DebugInfo/PDB/Native/Hash.cpp
index b9f685e..61188ec 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/Raw/Hash.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/Native/Hash.cpp
@@ -7,11 +7,11 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "llvm/DebugInfo/PDB/Raw/Hash.h"
-
+#include "llvm/DebugInfo/PDB/Native/Hash.h"
 #include "llvm/ADT/ArrayRef.h"
 #include "llvm/Support/Endian.h"
 #include "llvm/Support/JamCRC.h"
+#include <cstdint>
 
 using namespace llvm;
 using namespace llvm::support;
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Native/HashTable.cpp b/contrib/llvm/lib/DebugInfo/PDB/Native/HashTable.cpp
new file mode 100644
index 0000000..439217f
--- /dev/null
+++ b/contrib/llvm/lib/DebugInfo/PDB/Native/HashTable.cpp
@@ -0,0 +1,308 @@
+//===- HashTable.cpp - PDB Hash Table -------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/PDB/Native/HashTable.h"
+#include "llvm/ADT/Optional.h"
+#include "llvm/DebugInfo/PDB/Native/RawError.h"
+#include "llvm/Support/BinaryStreamReader.h"
+#include "llvm/Support/BinaryStreamWriter.h"
+#include "llvm/Support/Error.h"
+#include "llvm/Support/MathExtras.h"
+#include <algorithm>
+#include <cassert>
+#include <cstdint>
+#include <utility>
+
+using namespace llvm;
+using namespace llvm::pdb;
+
+HashTable::HashTable() : HashTable(8) {}
+
+HashTable::HashTable(uint32_t Capacity) { Buckets.resize(Capacity); }
+
+Error HashTable::load(BinaryStreamReader &Stream) {
+  const Header *H;
+  if (auto EC = Stream.readObject(H))
+    return EC;
+  if (H->Capacity == 0)
+    return make_error<RawError>(raw_error_code::corrupt_file,
+                                "Invalid Hash Table Capacity");
+  if (H->Size > maxLoad(H->Capacity))
+    return make_error<RawError>(raw_error_code::corrupt_file,
+                                "Invalid Hash Table Size");
+
+  Buckets.resize(H->Capacity);
+
+  if (auto EC = readSparseBitVector(Stream, Present))
+    return EC;
+  if (Present.count() != H->Size)
+    return make_error<RawError>(raw_error_code::corrupt_file,
+                                "Present bit vector does not match size!");
+
+  if (auto EC = readSparseBitVector(Stream, Deleted))
+    return EC;
+  if (Present.intersects(Deleted))
+    return make_error<RawError>(raw_error_code::corrupt_file,
+                                "Present bit vector interesects deleted!");
+
+  for (uint32_t P : Present) {
+    if (auto EC = Stream.readInteger(Buckets[P].first))
+      return EC;
+    if (auto EC = Stream.readInteger(Buckets[P].second))
+      return EC;
+  }
+
+  return Error::success();
+}
+
+uint32_t HashTable::calculateSerializedLength() const {
+  uint32_t Size = sizeof(Header);
+
+  int NumBitsP = Present.find_last() + 1;
+  int NumBitsD = Deleted.find_last() + 1;
+
+  // Present bit set number of words, followed by that many actual words.
+  Size += sizeof(uint32_t);
+  Size += alignTo(NumBitsP, sizeof(uint32_t));
+
+  // Deleted bit set number of words, followed by that many actual words.
+  Size += sizeof(uint32_t);
+  Size += alignTo(NumBitsD, sizeof(uint32_t));
+
+  // One (Key, Value) pair for each entry Present.
+  Size += 2 * sizeof(uint32_t) * size();
+
+  return Size;
+}
+
+Error HashTable::commit(BinaryStreamWriter &Writer) const {
+  Header H;
+  H.Size = size();
+  H.Capacity = capacity();
+  if (auto EC = Writer.writeObject(H))
+    return EC;
+
+  if (auto EC = writeSparseBitVector(Writer, Present))
+    return EC;
+
+  if (auto EC = writeSparseBitVector(Writer, Deleted))
+    return EC;
+
+  for (const auto &Entry : *this) {
+    if (auto EC = Writer.writeInteger(Entry.first))
+      return EC;
+    if (auto EC = Writer.writeInteger(Entry.second))
+      return EC;
+  }
+  return Error::success();
+}
+
+void HashTable::clear() {
+  Buckets.resize(8);
+  Present.clear();
+  Deleted.clear();
+}
+
+uint32_t HashTable::capacity() const { return Buckets.size(); }
+
+uint32_t HashTable::size() const { return Present.count(); }
+
+HashTableIterator HashTable::begin() const { return HashTableIterator(*this); }
+
+HashTableIterator HashTable::end() const {
+  return HashTableIterator(*this, 0, true);
+}
+
+HashTableIterator HashTable::find(uint32_t K) {
+  uint32_t H = K % capacity();
+  uint32_t I = H;
+  Optional<uint32_t> FirstUnused;
+  do {
+    if (isPresent(I)) {
+      if (Buckets[I].first == K)
+        return HashTableIterator(*this, I, false);
+    } else {
+      if (!FirstUnused)
+        FirstUnused = I;
+      // Insertion occurs via linear probing from the slot hint, and will be
+      // inserted at the first empty / deleted location.  Therefore, if we are
+      // probing and find a location that is neither present nor deleted, then
+      // nothing must have EVER been inserted at this location, and thus it is
+      // not possible for a matching value to occur later.
+      if (!isDeleted(I))
+        break;
+    }
+    I = (I + 1) % capacity();
+  } while (I != H);
+
+  // The only way FirstUnused would not be set is if every single entry in the
+  // table were Present.  But this would violate the load factor constraints
+  // that we impose, so it should never happen.
+  assert(FirstUnused);
+  return HashTableIterator(*this, *FirstUnused, true);
+}
+
+void HashTable::set(uint32_t K, uint32_t V) {
+  auto Entry = find(K);
+  if (Entry != end()) {
+    assert(isPresent(Entry.index()));
+    assert(Buckets[Entry.index()].first == K);
+    // We're updating, no need to do anything special.
+    Buckets[Entry.index()].second = V;
+    return;
+  }
+
+  auto &B = Buckets[Entry.index()];
+  assert(!isPresent(Entry.index()));
+  assert(Entry.isEnd());
+  B.first = K;
+  B.second = V;
+  Present.set(Entry.index());
+  Deleted.reset(Entry.index());
+
+  grow();
+
+  assert(find(K) != end());
+}
+
+void HashTable::remove(uint32_t K) {
+  auto Iter = find(K);
+  // It wasn't here to begin with, just exit.
+  if (Iter == end())
+    return;
+
+  assert(Present.test(Iter.index()));
+  assert(!Deleted.test(Iter.index()));
+  Deleted.set(Iter.index());
+  Present.reset(Iter.index());
+}
+
+uint32_t HashTable::get(uint32_t K) {
+  auto I = find(K);
+  assert(I != end());
+  return (*I).second;
+}
+
+uint32_t HashTable::maxLoad(uint32_t capacity) { return capacity * 2 / 3 + 1; }
+
+void HashTable::grow() {
+  uint32_t S = size();
+  if (S < maxLoad(capacity()))
+    return;
+  assert(capacity() != UINT32_MAX && "Can't grow Hash table!");
+
+  uint32_t NewCapacity =
+      (capacity() <= INT32_MAX) ? capacity() * 2 : UINT32_MAX;
+
+  // Growing requires rebuilding the table and re-hashing every item.  Make a
+  // copy with a larger capacity, insert everything into the copy, then swap
+  // it in.
+  HashTable NewMap(NewCapacity);
+  for (auto I : Present) {
+    NewMap.set(Buckets[I].first, Buckets[I].second);
+  }
+
+  Buckets.swap(NewMap.Buckets);
+  std::swap(Present, NewMap.Present);
+  std::swap(Deleted, NewMap.Deleted);
+  assert(capacity() == NewCapacity);
+  assert(size() == S);
+}
+
+Error HashTable::readSparseBitVector(BinaryStreamReader &Stream,
+                                     SparseBitVector<> &V) {
+  uint32_t NumWords;
+  if (auto EC = Stream.readInteger(NumWords))
+    return joinErrors(
+        std::move(EC),
+        make_error<RawError>(raw_error_code::corrupt_file,
+                             "Expected hash table number of words"));
+
+  for (uint32_t I = 0; I != NumWords; ++I) {
+    uint32_t Word;
+    if (auto EC = Stream.readInteger(Word))
+      return joinErrors(std::move(EC),
+                        make_error<RawError>(raw_error_code::corrupt_file,
+                                             "Expected hash table word"));
+    for (unsigned Idx = 0; Idx < 32; ++Idx)
+      if (Word & (1U << Idx))
+        V.set((I * 32) + Idx);
+  }
+  return Error::success();
+}
+
+Error HashTable::writeSparseBitVector(BinaryStreamWriter &Writer,
+                                      SparseBitVector<> &Vec) {
+  int ReqBits = Vec.find_last() + 1;
+  uint32_t NumWords = alignTo(ReqBits, sizeof(uint32_t)) / sizeof(uint32_t);
+  if (auto EC = Writer.writeInteger(NumWords))
+    return joinErrors(
+        std::move(EC),
+        make_error<RawError>(raw_error_code::corrupt_file,
+                             "Could not write linear map number of words"));
+
+  uint32_t Idx = 0;
+  for (uint32_t I = 0; I != NumWords; ++I) {
+    uint32_t Word = 0;
+    for (uint32_t WordIdx = 0; WordIdx < 32; ++WordIdx, ++Idx) {
+      if (Vec.test(Idx))
+        Word |= (1 << WordIdx);
+    }
+    if (auto EC = Writer.writeInteger(Word))
+      return joinErrors(std::move(EC), make_error<RawError>(
+                                           raw_error_code::corrupt_file,
+                                           "Could not write linear map word"));
+  }
+  return Error::success();
+}
+
+HashTableIterator::HashTableIterator(const HashTable &Map, uint32_t Index,
+                                     bool IsEnd)
+    : Map(&Map), Index(Index), IsEnd(IsEnd) {}
+
+HashTableIterator::HashTableIterator(const HashTable &Map) : Map(&Map) {
+  int I = Map.Present.find_first();
+  if (I == -1) {
+    Index = 0;
+    IsEnd = true;
+  } else {
+    Index = static_cast<uint32_t>(I);
+    IsEnd = false;
+  }
+}
+
+HashTableIterator &HashTableIterator::operator=(const HashTableIterator &R) {
+  Map = R.Map;
+  return *this;
+}
+
+bool HashTableIterator::operator==(const HashTableIterator &R) const {
+  if (IsEnd && R.IsEnd)
+    return true;
+  if (IsEnd != R.IsEnd)
+    return false;
+
+  return (Map == R.Map) && (Index == R.Index);
+}
+
+const std::pair<uint32_t, uint32_t> &HashTableIterator::operator*() const {
+  assert(Map->Present.test(Index));
+  return Map->Buckets[Index];
+}
+
+HashTableIterator &HashTableIterator::operator++() {
+  while (Index < Map->Buckets.size()) {
+    ++Index;
+    if (Map->Present.test(Index))
+      return *this;
+  }
+
+  IsEnd = true;
+  return *this;
+}
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Native/InfoStream.cpp b/contrib/llvm/lib/DebugInfo/PDB/Native/InfoStream.cpp
new file mode 100644
index 0000000..8298790
--- /dev/null
+++ b/contrib/llvm/lib/DebugInfo/PDB/Native/InfoStream.cpp
@@ -0,0 +1,139 @@
+//===- InfoStream.cpp - PDB Info Stream (Stream 1) Access -------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/PDB/Native/InfoStream.h"
+#include "llvm/ADT/BitVector.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/DebugInfo/PDB/Native/PDBFile.h"
+#include "llvm/DebugInfo/PDB/Native/RawConstants.h"
+#include "llvm/DebugInfo/PDB/Native/RawError.h"
+#include "llvm/DebugInfo/PDB/Native/RawTypes.h"
+#include "llvm/Support/BinaryStreamReader.h"
+#include "llvm/Support/BinaryStreamWriter.h"
+
+using namespace llvm;
+using namespace llvm::codeview;
+using namespace llvm::msf;
+using namespace llvm::pdb;
+
+InfoStream::InfoStream(std::unique_ptr<MappedBlockStream> Stream)
+    : Stream(std::move(Stream)) {}
+
+Error InfoStream::reload() {
+  BinaryStreamReader Reader(*Stream);
+
+  const InfoStreamHeader *H;
+  if (auto EC = Reader.readObject(H))
+    return joinErrors(
+        std::move(EC),
+        make_error<RawError>(raw_error_code::corrupt_file,
+                             "PDB Stream does not contain a header."));
+
+  switch (H->Version) {
+  case PdbImplVC70:
+  case PdbImplVC80:
+  case PdbImplVC110:
+  case PdbImplVC140:
+    break;
+  default:
+    return make_error<RawError>(raw_error_code::corrupt_file,
+                                "Unsupported PDB stream version.");
+  }
+
+  Version = H->Version;
+  Signature = H->Signature;
+  Age = H->Age;
+  Guid = H->Guid;
+
+  uint32_t Offset = Reader.getOffset();
+  if (auto EC = NamedStreams.load(Reader))
+    return EC;
+  uint32_t NewOffset = Reader.getOffset();
+  NamedStreamMapByteSize = NewOffset - Offset;
+
+  Reader.setOffset(Offset);
+  if (auto EC = Reader.readSubstream(SubNamedStreams, NamedStreamMapByteSize))
+    return EC;
+
+  bool Stop = false;
+  while (!Stop && !Reader.empty()) {
+    PdbRaw_FeatureSig Sig;
+    if (auto EC = Reader.readEnum(Sig))
+      return EC;
+    // Since this value comes from a file, it's possible we have some strange
+    // value which doesn't correspond to any value.  We don't want to warn on
+    // -Wcovered-switch-default in this case, so switch on the integral value
+    // instead of the enumeration value.
+    switch (uint32_t(Sig)) {
+    case uint32_t(PdbRaw_FeatureSig::VC110):
+      // No other flags for VC110 PDB.
+      Stop = true;
+      LLVM_FALLTHROUGH;
+    case uint32_t(PdbRaw_FeatureSig::VC140):
+      Features |= PdbFeatureContainsIdStream;
+      break;
+    case uint32_t(PdbRaw_FeatureSig::NoTypeMerge):
+      Features |= PdbFeatureNoTypeMerging;
+      break;
+    case uint32_t(PdbRaw_FeatureSig::MinimalDebugInfo):
+      Features |= PdbFeatureMinimalDebugInfo;
+      break;
+    default:
+      continue;
+    }
+    FeatureSignatures.push_back(Sig);
+  }
+  return Error::success();
+}
+
+uint32_t InfoStream::getStreamSize() const { return Stream->getLength(); }
+
+uint32_t InfoStream::getNamedStreamIndex(llvm::StringRef Name) const {
+  uint32_t Result;
+  if (!NamedStreams.get(Name, Result))
+    return 0;
+  return Result;
+}
+
+iterator_range<StringMapConstIterator<uint32_t>>
+InfoStream::named_streams() const {
+  return NamedStreams.entries();
+}
+
+bool InfoStream::containsIdStream() const {
+  return !!(Features & PdbFeatureContainsIdStream);
+}
+
+PdbRaw_ImplVer InfoStream::getVersion() const {
+  return static_cast<PdbRaw_ImplVer>(Version);
+}
+
+uint32_t InfoStream::getSignature() const { return Signature; }
+
+uint32_t InfoStream::getAge() const { return Age; }
+
+GUID InfoStream::getGuid() const { return Guid; }
+
+uint32_t InfoStream::getNamedStreamMapByteSize() const {
+  return NamedStreamMapByteSize;
+}
+
+PdbRaw_Features InfoStream::getFeatures() const { return Features; }
+
+ArrayRef<PdbRaw_FeatureSig> InfoStream::getFeatureSignatures() const {
+  return FeatureSignatures;
+}
+
+const NamedStreamMap &InfoStream::getNamedStreams() const {
+  return NamedStreams;
+}
+
+BinarySubstreamRef InfoStream::getNamedStreamsBuffer() const {
+  return SubNamedStreams;
+}
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Native/InfoStreamBuilder.cpp b/contrib/llvm/lib/DebugInfo/PDB/Native/InfoStreamBuilder.cpp
new file mode 100644
index 0000000..6450ae7
--- /dev/null
+++ b/contrib/llvm/lib/DebugInfo/PDB/Native/InfoStreamBuilder.cpp
@@ -0,0 +1,74 @@
+//===- InfoStreamBuilder.cpp - PDB Info Stream Creation ---------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/PDB/Native/InfoStreamBuilder.h"
+
+#include "llvm/DebugInfo/MSF/MSFBuilder.h"
+#include "llvm/DebugInfo/MSF/MappedBlockStream.h"
+#include "llvm/DebugInfo/PDB/Native/InfoStream.h"
+#include "llvm/DebugInfo/PDB/Native/NamedStreamMap.h"
+#include "llvm/DebugInfo/PDB/Native/PDBFileBuilder.h"
+#include "llvm/DebugInfo/PDB/Native/RawError.h"
+#include "llvm/DebugInfo/PDB/Native/RawTypes.h"
+#include "llvm/Support/BinaryStreamWriter.h"
+
+using namespace llvm;
+using namespace llvm::codeview;
+using namespace llvm::msf;
+using namespace llvm::pdb;
+
+InfoStreamBuilder::InfoStreamBuilder(msf::MSFBuilder &Msf,
+                                     NamedStreamMap &NamedStreams)
+    : Msf(Msf), Ver(PdbRaw_ImplVer::PdbImplVC70), Sig(-1), Age(0),
+      NamedStreams(NamedStreams) {}
+
+void InfoStreamBuilder::setVersion(PdbRaw_ImplVer V) { Ver = V; }
+
+void InfoStreamBuilder::setSignature(uint32_t S) { Sig = S; }
+
+void InfoStreamBuilder::setAge(uint32_t A) { Age = A; }
+
+void InfoStreamBuilder::setGuid(GUID G) { Guid = G; }
+
+void InfoStreamBuilder::addFeature(PdbRaw_FeatureSig Sig) {
+  Features.push_back(Sig);
+}
+
+Error InfoStreamBuilder::finalizeMsfLayout() {
+  uint32_t Length = sizeof(InfoStreamHeader) + NamedStreams.finalize() +
+                    (Features.size() + 1) * sizeof(uint32_t);
+  if (auto EC = Msf.setStreamSize(StreamPDB, Length))
+    return EC;
+  return Error::success();
+}
+
+Error InfoStreamBuilder::commit(const msf::MSFLayout &Layout,
+                                WritableBinaryStreamRef Buffer) const {
+  auto InfoS = WritableMappedBlockStream::createIndexedStream(
+      Layout, Buffer, StreamPDB, Msf.getAllocator());
+  BinaryStreamWriter Writer(*InfoS);
+
+  InfoStreamHeader H;
+  H.Age = Age;
+  H.Signature = Sig;
+  H.Version = Ver;
+  H.Guid = Guid;
+  if (auto EC = Writer.writeObject(H))
+    return EC;
+
+  if (auto EC = NamedStreams.commit(Writer))
+    return EC;
+  if (auto EC = Writer.writeInteger(0))
+    return EC;
+  for (auto E : Features) {
+    if (auto EC = Writer.writeEnum(E))
+      return EC;
+  }
+  return Error::success();
+}
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Native/ModuleDebugStream.cpp b/contrib/llvm/lib/DebugInfo/PDB/Native/ModuleDebugStream.cpp
new file mode 100644
index 0000000..2e1f61c
--- /dev/null
+++ b/contrib/llvm/lib/DebugInfo/PDB/Native/ModuleDebugStream.cpp
@@ -0,0 +1,123 @@
+//===- ModuleDebugStream.cpp - PDB Module Info Stream Access --------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/PDB/Native/ModuleDebugStream.h"
+#include "llvm/ADT/iterator_range.h"
+#include "llvm/DebugInfo/CodeView/CodeView.h"
+#include "llvm/DebugInfo/CodeView/DebugChecksumsSubsection.h"
+#include "llvm/DebugInfo/CodeView/SymbolRecord.h"
+#include "llvm/DebugInfo/PDB/Native/DbiModuleDescriptor.h"
+#include "llvm/DebugInfo/PDB/Native/RawError.h"
+#include "llvm/Support/BinaryStreamReader.h"
+#include "llvm/Support/BinaryStreamRef.h"
+#include "llvm/Support/Error.h"
+#include <algorithm>
+#include <cstdint>
+
+using namespace llvm;
+using namespace llvm::codeview;
+using namespace llvm::msf;
+using namespace llvm::pdb;
+
+ModuleDebugStreamRef::ModuleDebugStreamRef(
+    const DbiModuleDescriptor &Module,
+    std::unique_ptr<MappedBlockStream> Stream)
+    : Mod(Module), Stream(std::move(Stream)) {}
+
+ModuleDebugStreamRef::~ModuleDebugStreamRef() = default;
+
+Error ModuleDebugStreamRef::reload() {
+  BinaryStreamReader Reader(*Stream);
+
+  uint32_t SymbolSize = Mod.getSymbolDebugInfoByteSize();
+  uint32_t C11Size = Mod.getC11LineInfoByteSize();
+  uint32_t C13Size = Mod.getC13LineInfoByteSize();
+
+  if (C11Size > 0 && C13Size > 0)
+    return make_error<RawError>(raw_error_code::corrupt_file,
+                                "Module has both C11 and C13 line info");
+
+  BinaryStreamRef S;
+
+  if (auto EC = Reader.readInteger(Signature))
+    return EC;
+  if (auto EC = Reader.readSubstream(SymbolsSubstream, SymbolSize - 4))
+    return EC;
+  if (auto EC = Reader.readSubstream(C11LinesSubstream, C11Size))
+    return EC;
+  if (auto EC = Reader.readSubstream(C13LinesSubstream, C13Size))
+    return EC;
+
+  BinaryStreamReader SymbolReader(SymbolsSubstream.StreamData);
+  if (auto EC =
+          SymbolReader.readArray(SymbolArray, SymbolReader.bytesRemaining()))
+    return EC;
+
+  BinaryStreamReader SubsectionsReader(C13LinesSubstream.StreamData);
+  if (auto EC = SubsectionsReader.readArray(Subsections,
+                                            SubsectionsReader.bytesRemaining()))
+    return EC;
+
+  uint32_t GlobalRefsSize;
+  if (auto EC = Reader.readInteger(GlobalRefsSize))
+    return EC;
+  if (auto EC = Reader.readSubstream(GlobalRefsSubstream, GlobalRefsSize))
+    return EC;
+  if (Reader.bytesRemaining() > 0)
+    return make_error<RawError>(raw_error_code::corrupt_file,
+                                "Unexpected bytes in module stream.");
+
+  return Error::success();
+}
+
+BinarySubstreamRef ModuleDebugStreamRef::getSymbolsSubstream() const {
+  return SymbolsSubstream;
+}
+
+BinarySubstreamRef ModuleDebugStreamRef::getC11LinesSubstream() const {
+  return C11LinesSubstream;
+}
+
+BinarySubstreamRef ModuleDebugStreamRef::getC13LinesSubstream() const {
+  return C13LinesSubstream;
+}
+
+BinarySubstreamRef ModuleDebugStreamRef::getGlobalRefsSubstream() const {
+  return GlobalRefsSubstream;
+}
+
+iterator_range<codeview::CVSymbolArray::Iterator>
+ModuleDebugStreamRef::symbols(bool *HadError) const {
+  return make_range(SymbolArray.begin(HadError), SymbolArray.end());
+}
+
+iterator_range<ModuleDebugStreamRef::DebugSubsectionIterator>
+ModuleDebugStreamRef::subsections() const {
+  return make_range(Subsections.begin(), Subsections.end());
+}
+
+bool ModuleDebugStreamRef::hasDebugSubsections() const {
+  return !C13LinesSubstream.empty();
+}
+
+Error ModuleDebugStreamRef::commit() { return Error::success(); }
+
+Expected<codeview::DebugChecksumsSubsectionRef>
+ModuleDebugStreamRef::findChecksumsSubsection() const {
+  codeview::DebugChecksumsSubsectionRef Result;
+  for (const auto &SS : subsections()) {
+    if (SS.kind() != DebugSubsectionKind::FileChecksums)
+      continue;
+
+    if (auto EC = Result.initialize(SS.getRecordData()))
+      return std::move(EC);
+    return Result;
+  }
+  return Result;
+}
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Native/NamedStreamMap.cpp b/contrib/llvm/lib/DebugInfo/PDB/Native/NamedStreamMap.cpp
new file mode 100644
index 0000000..6cdf6dd
--- /dev/null
+++ b/contrib/llvm/lib/DebugInfo/PDB/Native/NamedStreamMap.cpp
@@ -0,0 +1,152 @@
+//===- NamedStreamMap.cpp - PDB Named Stream Map --------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/PDB/Native/NamedStreamMap.h"
+#include "llvm/ADT/StringMap.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/iterator_range.h"
+#include "llvm/DebugInfo/PDB/Native/HashTable.h"
+#include "llvm/DebugInfo/PDB/Native/RawError.h"
+#include "llvm/Support/BinaryStreamReader.h"
+#include "llvm/Support/BinaryStreamRef.h"
+#include "llvm/Support/BinaryStreamWriter.h"
+#include "llvm/Support/Endian.h"
+#include "llvm/Support/Error.h"
+#include <algorithm>
+#include <cassert>
+#include <cstdint>
+#include <tuple>
+
+using namespace llvm;
+using namespace llvm::pdb;
+
+// FIXME: This shouldn't be necessary, but if we insert the strings in any
+// other order, cvdump cannot read the generated name map.  This suggests that
+// we may be using the wrong hash function.  A closer inspection of the cvdump
+// source code may reveal something, but for now this at least makes us work,
+// even if only by accident.
+static constexpr const char *OrderedStreamNames[] = {"/LinkInfo", "/names",
+                                                     "/src/headerblock"};
+
+NamedStreamMap::NamedStreamMap() = default;
+
+Error NamedStreamMap::load(BinaryStreamReader &Stream) {
+  Mapping.clear();
+  FinalizedHashTable.clear();
+  FinalizedInfo.reset();
+
+  uint32_t StringBufferSize;
+  if (auto EC = Stream.readInteger(StringBufferSize))
+    return joinErrors(std::move(EC),
+                      make_error<RawError>(raw_error_code::corrupt_file,
+                                           "Expected string buffer size"));
+
+  BinaryStreamRef StringsBuffer;
+  if (auto EC = Stream.readStreamRef(StringsBuffer, StringBufferSize))
+    return EC;
+
+  HashTable OffsetIndexMap;
+  if (auto EC = OffsetIndexMap.load(Stream))
+    return EC;
+
+  uint32_t NameOffset;
+  uint32_t NameIndex;
+  for (const auto &Entry : OffsetIndexMap) {
+    std::tie(NameOffset, NameIndex) = Entry;
+
+    // Compute the offset of the start of the string relative to the stream.
+    BinaryStreamReader NameReader(StringsBuffer);
+    NameReader.setOffset(NameOffset);
+    // Pump out our c-string from the stream.
+    StringRef Str;
+    if (auto EC = NameReader.readCString(Str))
+      return joinErrors(std::move(EC),
+                        make_error<RawError>(raw_error_code::corrupt_file,
+                                             "Expected name map name"));
+
+    // Add this to a string-map from name to stream number.
+    Mapping.insert({Str, NameIndex});
+  }
+
+  return Error::success();
+}
+
+Error NamedStreamMap::commit(BinaryStreamWriter &Writer) const {
+  assert(FinalizedInfo.hasValue());
+
+  // The first field is the number of bytes of string data.
+  if (auto EC = Writer.writeInteger(FinalizedInfo->StringDataBytes))
+    return EC;
+
+  for (const auto &Name : OrderedStreamNames) {
+    auto Item = Mapping.find(Name);
+    if (Item == Mapping.end())
+      continue;
+    if (auto EC = Writer.writeCString(Item->getKey()))
+      return EC;
+  }
+
+  // And finally the Offset Index map.
+  if (auto EC = FinalizedHashTable.commit(Writer))
+    return EC;
+
+  return Error::success();
+}
+
+uint32_t NamedStreamMap::finalize() {
+  if (FinalizedInfo.hasValue())
+    return FinalizedInfo->SerializedLength;
+
+  // Build the finalized hash table.
+  FinalizedHashTable.clear();
+  FinalizedInfo.emplace();
+
+  for (const auto &Name : OrderedStreamNames) {
+    auto Item = Mapping.find(Name);
+    if (Item == Mapping.end())
+      continue;
+    FinalizedHashTable.set(FinalizedInfo->StringDataBytes, Item->getValue());
+    FinalizedInfo->StringDataBytes += Item->getKeyLength() + 1;
+  }
+
+  // Number of bytes of string data.
+  FinalizedInfo->SerializedLength += sizeof(support::ulittle32_t);
+  // Followed by that many actual bytes of string data.
+  FinalizedInfo->SerializedLength += FinalizedInfo->StringDataBytes;
+  // Followed by the mapping from Offset to Index.
+  FinalizedInfo->SerializedLength +=
+      FinalizedHashTable.calculateSerializedLength();
+  return FinalizedInfo->SerializedLength;
+}
+
+iterator_range<StringMapConstIterator<uint32_t>>
+NamedStreamMap::entries() const {
+  return make_range<StringMapConstIterator<uint32_t>>(Mapping.begin(),
+                                                      Mapping.end());
+}
+
+uint32_t NamedStreamMap::size() const { return Mapping.size(); }
+
+bool NamedStreamMap::get(StringRef Stream, uint32_t &StreamNo) const {
+  auto Iter = Mapping.find(Stream);
+  if (Iter == Mapping.end())
+    return false;
+  StreamNo = Iter->second;
+  return true;
+}
+
+void NamedStreamMap::set(StringRef Stream, uint32_t StreamNo) {
+  FinalizedInfo.reset();
+  Mapping[Stream] = StreamNo;
+}
+
+void NamedStreamMap::remove(StringRef Stream) {
+  FinalizedInfo.reset();
+  Mapping.erase(Stream);
+}
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Native/NativeBuiltinSymbol.cpp b/contrib/llvm/lib/DebugInfo/PDB/Native/NativeBuiltinSymbol.cpp
new file mode 100644
index 0000000..60416f6
--- /dev/null
+++ b/contrib/llvm/lib/DebugInfo/PDB/Native/NativeBuiltinSymbol.cpp
@@ -0,0 +1,48 @@
+//===- NativeBuiltinSymbol.cpp ------------------------------------ C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/PDB/Native/NativeBuiltinSymbol.h"
+
+#include "llvm/DebugInfo/PDB/Native/NativeSession.h"
+
+namespace llvm {
+namespace pdb {
+
+NativeBuiltinSymbol::NativeBuiltinSymbol(NativeSession &PDBSession,
+                                         SymIndexId Id, PDB_BuiltinType T,
+                                         uint64_t L)
+    : NativeRawSymbol(PDBSession, Id), Session(PDBSession), Type(T), Length(L) {
+}
+
+NativeBuiltinSymbol::~NativeBuiltinSymbol() {}
+
+std::unique_ptr<NativeRawSymbol> NativeBuiltinSymbol::clone() const {
+  return llvm::make_unique<NativeBuiltinSymbol>(Session, SymbolId, Type, Length);
+}
+
+void NativeBuiltinSymbol::dump(raw_ostream &OS, int Indent) const {
+  // TODO:  Apparently nothing needs this yet.
+}
+
+PDB_SymType NativeBuiltinSymbol::getSymTag() const {
+  return PDB_SymType::BuiltinType;
+}
+
+PDB_BuiltinType NativeBuiltinSymbol::getBuiltinType() const { return Type; }
+
+bool NativeBuiltinSymbol::isConstType() const { return false; }
+
+uint64_t NativeBuiltinSymbol::getLength() const { return Length; }
+
+bool NativeBuiltinSymbol::isUnalignedType() const { return false; }
+
+bool NativeBuiltinSymbol::isVolatileType() const { return false; }
+
+} // namespace pdb
+} // namespace llvm
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Native/NativeCompilandSymbol.cpp b/contrib/llvm/lib/DebugInfo/PDB/Native/NativeCompilandSymbol.cpp
new file mode 100644
index 0000000..7132a99
--- /dev/null
+++ b/contrib/llvm/lib/DebugInfo/PDB/Native/NativeCompilandSymbol.cpp
@@ -0,0 +1,50 @@
+//===- NativeCompilandSymbol.cpp - Native impl for compilands ---*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/PDB/Native/NativeCompilandSymbol.h"
+
+#include "llvm/ADT/STLExtras.h"
+
+namespace llvm {
+namespace pdb {
+
+NativeCompilandSymbol::NativeCompilandSymbol(NativeSession &Session,
+                                             SymIndexId SymbolId,
+                                             DbiModuleDescriptor MI)
+    : NativeRawSymbol(Session, SymbolId), Module(MI) {}
+
+PDB_SymType NativeCompilandSymbol::getSymTag() const {
+  return PDB_SymType::Compiland;
+}
+
+std::unique_ptr<NativeRawSymbol> NativeCompilandSymbol::clone() const {
+  return llvm::make_unique<NativeCompilandSymbol>(Session, SymbolId, Module);
+}
+
+bool NativeCompilandSymbol::isEditAndContinueEnabled() const {
+  return Module.hasECInfo();
+}
+
+uint32_t NativeCompilandSymbol::getLexicalParentId() const { return 0; }
+
+// The usage of getObjFileName for getLibraryName and getModuleName for getName
+// may seem backwards, but it is consistent with DIA, which is what this API
+// was modeled after.  We may rename these methods later to try to eliminate
+// this potential confusion.
+
+std::string NativeCompilandSymbol::getLibraryName() const {
+  return Module.getObjFileName();
+}
+
+std::string NativeCompilandSymbol::getName() const {
+  return Module.getModuleName();
+}
+
+} // namespace pdb
+} // namespace llvm
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Native/NativeEnumModules.cpp b/contrib/llvm/lib/DebugInfo/PDB/Native/NativeEnumModules.cpp
new file mode 100644
index 0000000..a65782e
--- /dev/null
+++ b/contrib/llvm/lib/DebugInfo/PDB/Native/NativeEnumModules.cpp
@@ -0,0 +1,51 @@
+//==- NativeEnumModules.cpp - Native Symbol Enumerator impl ------*- C++ -*-==//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/PDB/Native/NativeEnumModules.h"
+
+#include "llvm/DebugInfo/PDB/IPDBEnumChildren.h"
+#include "llvm/DebugInfo/PDB/Native/DbiModuleList.h"
+#include "llvm/DebugInfo/PDB/Native/NativeCompilandSymbol.h"
+#include "llvm/DebugInfo/PDB/Native/NativeSession.h"
+#include "llvm/DebugInfo/PDB/PDBSymbol.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolCompiland.h"
+
+namespace llvm {
+namespace pdb {
+
+NativeEnumModules::NativeEnumModules(NativeSession &PDBSession,
+                                     const DbiModuleList &Modules,
+                                     uint32_t Index)
+    : Session(PDBSession), Modules(Modules), Index(Index) {}
+
+uint32_t NativeEnumModules::getChildCount() const {
+  return static_cast<uint32_t>(Modules.getModuleCount());
+}
+
+std::unique_ptr<PDBSymbol>
+NativeEnumModules::getChildAtIndex(uint32_t Index) const {
+  if (Index >= Modules.getModuleCount())
+    return nullptr;
+  return Session.createCompilandSymbol(Modules.getModuleDescriptor(Index));
+}
+
+std::unique_ptr<PDBSymbol> NativeEnumModules::getNext() {
+  if (Index >= Modules.getModuleCount())
+    return nullptr;
+  return getChildAtIndex(Index++);
+}
+
+void NativeEnumModules::reset() { Index = 0; }
+
+NativeEnumModules *NativeEnumModules::clone() const {
+  return new NativeEnumModules(Session, Modules, Index);
+}
+
+}
+}
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Native/NativeExeSymbol.cpp b/contrib/llvm/lib/DebugInfo/PDB/Native/NativeExeSymbol.cpp
new file mode 100644
index 0000000..3241000
--- /dev/null
+++ b/contrib/llvm/lib/DebugInfo/PDB/Native/NativeExeSymbol.cpp
@@ -0,0 +1,84 @@
+//===- NativeExeSymbol.cpp - native impl for PDBSymbolExe -------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/PDB/Native/NativeExeSymbol.h"
+
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/DebugInfo/PDB/Native/DbiStream.h"
+#include "llvm/DebugInfo/PDB/Native/InfoStream.h"
+#include "llvm/DebugInfo/PDB/Native/NativeEnumModules.h"
+#include "llvm/DebugInfo/PDB/Native/PDBFile.h"
+
+namespace llvm {
+namespace pdb {
+
+NativeExeSymbol::NativeExeSymbol(NativeSession &Session, SymIndexId SymbolId)
+    : NativeRawSymbol(Session, SymbolId), File(Session.getPDBFile()) {}
+
+std::unique_ptr<NativeRawSymbol> NativeExeSymbol::clone() const {
+  return llvm::make_unique<NativeExeSymbol>(Session, SymbolId);
+}
+
+std::unique_ptr<IPDBEnumSymbols>
+NativeExeSymbol::findChildren(PDB_SymType Type) const {
+  switch (Type) {
+  case PDB_SymType::Compiland: {
+    auto Dbi = File.getPDBDbiStream();
+    if (Dbi) {
+      const DbiModuleList &Modules = Dbi->modules();
+      return std::unique_ptr<IPDBEnumSymbols>(
+          new NativeEnumModules(Session, Modules));
+    }
+    consumeError(Dbi.takeError());
+    break;
+  }
+  default:
+    break;
+  }
+  return nullptr;
+}
+
+uint32_t NativeExeSymbol::getAge() const {
+  auto IS = File.getPDBInfoStream();
+  if (IS)
+    return IS->getAge();
+  consumeError(IS.takeError());
+  return 0;
+}
+
+std::string NativeExeSymbol::getSymbolsFileName() const {
+  return File.getFilePath();
+}
+
+codeview::GUID NativeExeSymbol::getGuid() const {
+  auto IS = File.getPDBInfoStream();
+  if (IS)
+    return IS->getGuid();
+  consumeError(IS.takeError());
+  return codeview::GUID{{0}};
+}
+
+bool NativeExeSymbol::hasCTypes() const {
+  auto Dbi = File.getPDBDbiStream();
+  if (Dbi)
+    return Dbi->hasCTypes();
+  consumeError(Dbi.takeError());
+  return false;
+}
+
+bool NativeExeSymbol::hasPrivateSymbols() const {
+  auto Dbi = File.getPDBDbiStream();
+  if (Dbi)
+    return !Dbi->isStripped();
+  consumeError(Dbi.takeError());
+  return false;
+}
+
+} // namespace pdb
+} // namespace llvm
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Native/NativeRawSymbol.cpp b/contrib/llvm/lib/DebugInfo/PDB/Native/NativeRawSymbol.cpp
new file mode 100644
index 0000000..df3f418
--- /dev/null
+++ b/contrib/llvm/lib/DebugInfo/PDB/Native/NativeRawSymbol.cpp
@@ -0,0 +1,694 @@
+//===- NativeRawSymbol.cpp - Native implementation of IPDBRawSymbol -------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/PDB/Native/NativeRawSymbol.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypeBuiltin.h"
+
+using namespace llvm;
+using namespace llvm::pdb;
+
+NativeRawSymbol::NativeRawSymbol(NativeSession &PDBSession, SymIndexId SymbolId)
+    : Session(PDBSession), SymbolId(SymbolId) {}
+
+void NativeRawSymbol::dump(raw_ostream &OS, int Indent) const {}
+
+std::unique_ptr<IPDBEnumSymbols>
+NativeRawSymbol::findChildren(PDB_SymType Type) const {
+  return nullptr;
+}
+
+std::unique_ptr<IPDBEnumSymbols>
+NativeRawSymbol::findChildren(PDB_SymType Type, StringRef Name,
+    PDB_NameSearchFlags Flags) const {
+  return nullptr;
+}
+
+std::unique_ptr<IPDBEnumSymbols>
+NativeRawSymbol::findChildrenByRVA(PDB_SymType Type, StringRef Name,
+    PDB_NameSearchFlags Flags, uint32_t RVA) const {
+  return nullptr;
+}
+
+std::unique_ptr<IPDBEnumSymbols>
+NativeRawSymbol::findInlineFramesByRVA(uint32_t RVA) const {
+  return nullptr;
+}
+
+void NativeRawSymbol::getDataBytes(SmallVector<uint8_t, 32> &bytes) const {
+  bytes.clear();
+}
+
+PDB_MemberAccess NativeRawSymbol::getAccess() const {
+  return PDB_MemberAccess::Private;
+}
+
+uint32_t NativeRawSymbol::getAddressOffset() const {
+  return 0;
+}
+
+uint32_t NativeRawSymbol::getAddressSection() const {
+  return 0;
+}
+
+uint32_t NativeRawSymbol::getAge() const {
+  return 0;
+}
+
+uint32_t NativeRawSymbol::getArrayIndexTypeId() const {
+  return 0;
+}
+
+void NativeRawSymbol::getBackEndVersion(VersionInfo &Version) const {
+  Version.Major = 0;
+  Version.Minor = 0;
+  Version.Build = 0;
+  Version.QFE = 0;
+}
+
+uint32_t NativeRawSymbol::getBaseDataOffset() const {
+  return 0;
+}
+
+uint32_t NativeRawSymbol::getBaseDataSlot() const {
+  return 0;
+}
+
+uint32_t NativeRawSymbol::getBaseSymbolId() const {
+  return 0;
+}
+
+PDB_BuiltinType NativeRawSymbol::getBuiltinType() const {
+  return PDB_BuiltinType::None;
+}
+
+uint32_t NativeRawSymbol::getBitPosition() const {
+  return 0;
+}
+
+PDB_CallingConv NativeRawSymbol::getCallingConvention() const {
+  return PDB_CallingConv::FarStdCall;
+}
+
+uint32_t NativeRawSymbol::getClassParentId() const {
+  return 0;
+}
+
+std::string NativeRawSymbol::getCompilerName() const {
+  return {};
+}
+
+uint32_t NativeRawSymbol::getCount() const {
+  return 0;
+}
+
+uint32_t NativeRawSymbol::getCountLiveRanges() const {
+  return 0;
+}
+
+void NativeRawSymbol::getFrontEndVersion(VersionInfo &Version) const {
+  Version.Major = 0;
+  Version.Minor = 0;
+  Version.Build = 0;
+  Version.QFE = 0;
+}
+
+PDB_Lang NativeRawSymbol::getLanguage() const {
+  return PDB_Lang::Cobol;
+}
+
+uint32_t NativeRawSymbol::getLexicalParentId() const {
+  return 0;
+}
+
+std::string NativeRawSymbol::getLibraryName() const {
+  return {};
+}
+
+uint32_t NativeRawSymbol::getLiveRangeStartAddressOffset() const {
+  return 0;
+}
+
+uint32_t NativeRawSymbol::getLiveRangeStartAddressSection() const {
+  return 0;
+}
+
+uint32_t NativeRawSymbol::getLiveRangeStartRelativeVirtualAddress() const {
+  return 0;
+}
+
+codeview::RegisterId NativeRawSymbol::getLocalBasePointerRegisterId() const {
+  return codeview::RegisterId::EAX;
+}
+
+uint32_t NativeRawSymbol::getLowerBoundId() const {
+  return 0;
+}
+
+uint32_t NativeRawSymbol::getMemorySpaceKind() const {
+  return 0;
+}
+
+std::string NativeRawSymbol::getName() const {
+  return {};
+}
+
+uint32_t NativeRawSymbol::getNumberOfAcceleratorPointerTags() const {
+  return 0;
+}
+
+uint32_t NativeRawSymbol::getNumberOfColumns() const {
+  return 0;
+}
+
+uint32_t NativeRawSymbol::getNumberOfModifiers() const {
+  return 0;
+}
+
+uint32_t NativeRawSymbol::getNumberOfRegisterIndices() const {
+  return 0;
+}
+
+uint32_t NativeRawSymbol::getNumberOfRows() const {
+  return 0;
+}
+
+std::string NativeRawSymbol::getObjectFileName() const {
+  return {};
+}
+
+uint32_t NativeRawSymbol::getOemId() const {
+  return 0;
+}
+
+uint32_t NativeRawSymbol::getOemSymbolId() const {
+  return 0;
+}
+
+uint32_t NativeRawSymbol::getOffsetInUdt() const {
+  return 0;
+}
+
+PDB_Cpu NativeRawSymbol::getPlatform() const {
+  return PDB_Cpu::Intel8080;
+}
+
+uint32_t NativeRawSymbol::getRank() const {
+  return 0;
+}
+
+codeview::RegisterId NativeRawSymbol::getRegisterId() const {
+  return codeview::RegisterId::EAX;
+}
+
+uint32_t NativeRawSymbol::getRegisterType() const {
+  return 0;
+}
+
+uint32_t NativeRawSymbol::getRelativeVirtualAddress() const {
+  return 0;
+}
+
+uint32_t NativeRawSymbol::getSamplerSlot() const {
+  return 0;
+}
+
+uint32_t NativeRawSymbol::getSignature() const {
+  return 0;
+}
+
+uint32_t NativeRawSymbol::getSizeInUdt() const {
+  return 0;
+}
+
+uint32_t NativeRawSymbol::getSlot() const {
+  return 0;
+}
+
+std::string NativeRawSymbol::getSourceFileName() const {
+  return {};
+}
+
+uint32_t NativeRawSymbol::getStride() const {
+  return 0;
+}
+
+uint32_t NativeRawSymbol::getSubTypeId() const {
+  return 0;
+}
+
+std::string NativeRawSymbol::getSymbolsFileName() const { return {}; }
+
+uint32_t NativeRawSymbol::getSymIndexId() const { return SymbolId; }
+
+uint32_t NativeRawSymbol::getTargetOffset() const {
+  return 0;
+}
+
+uint32_t NativeRawSymbol::getTargetRelativeVirtualAddress() const {
+  return 0;
+}
+
+uint64_t NativeRawSymbol::getTargetVirtualAddress() const {
+  return 0;
+}
+
+uint32_t NativeRawSymbol::getTargetSection() const {
+  return 0;
+}
+
+uint32_t NativeRawSymbol::getTextureSlot() const {
+  return 0;
+}
+
+uint32_t NativeRawSymbol::getTimeStamp() const {
+  return 0;
+}
+
+uint32_t NativeRawSymbol::getToken() const {
+  return 0;
+}
+
+uint32_t NativeRawSymbol::getTypeId() const {
+  return 0;
+}
+
+uint32_t NativeRawSymbol::getUavSlot() const {
+  return 0;
+}
+
+std::string NativeRawSymbol::getUndecoratedName() const {
+  return {};
+}
+
+uint32_t NativeRawSymbol::getUnmodifiedTypeId() const {
+  return 0;
+}
+
+uint32_t NativeRawSymbol::getUpperBoundId() const {
+  return 0;
+}
+
+Variant NativeRawSymbol::getValue() const {
+  return Variant();
+}
+
+uint32_t NativeRawSymbol::getVirtualBaseDispIndex() const {
+  return 0;
+}
+
+uint32_t NativeRawSymbol::getVirtualBaseOffset() const {
+  return 0;
+}
+
+uint32_t NativeRawSymbol::getVirtualTableShapeId() const {
+  return 0;
+}
+
+std::unique_ptr<PDBSymbolTypeBuiltin>
+NativeRawSymbol::getVirtualBaseTableType() const {
+  return nullptr;
+}
+
+PDB_DataKind NativeRawSymbol::getDataKind() const {
+  return PDB_DataKind::Unknown;
+}
+
+PDB_SymType NativeRawSymbol::getSymTag() const {
+  return PDB_SymType::None;
+}
+
+codeview::GUID NativeRawSymbol::getGuid() const { return codeview::GUID{{0}}; }
+
+int32_t NativeRawSymbol::getOffset() const {
+  return 0;
+}
+
+int32_t NativeRawSymbol::getThisAdjust() const {
+  return 0;
+}
+
+int32_t NativeRawSymbol::getVirtualBasePointerOffset() const {
+  return 0;
+}
+
+PDB_LocType NativeRawSymbol::getLocationType() const {
+  return PDB_LocType::Null;
+}
+
+PDB_Machine NativeRawSymbol::getMachineType() const {
+  return PDB_Machine::Invalid;
+}
+
+codeview::ThunkOrdinal NativeRawSymbol::getThunkOrdinal() const {
+  return codeview::ThunkOrdinal::Standard;
+}
+
+uint64_t NativeRawSymbol::getLength() const {
+  return 0;
+}
+
+uint64_t NativeRawSymbol::getLiveRangeLength() const {
+  return 0;
+}
+
+uint64_t NativeRawSymbol::getVirtualAddress() const {
+  return 0;
+}
+
+PDB_UdtType NativeRawSymbol::getUdtKind() const {
+  return PDB_UdtType::Struct;
+}
+
+bool NativeRawSymbol::hasConstructor() const {
+  return false;
+}
+
+bool NativeRawSymbol::hasCustomCallingConvention() const {
+  return false;
+}
+
+bool NativeRawSymbol::hasFarReturn() const {
+  return false;
+}
+
+bool NativeRawSymbol::isCode() const {
+  return false;
+}
+
+bool NativeRawSymbol::isCompilerGenerated() const {
+  return false;
+}
+
+bool NativeRawSymbol::isConstType() const {
+  return false;
+}
+
+bool NativeRawSymbol::isEditAndContinueEnabled() const {
+  return false;
+}
+
+bool NativeRawSymbol::isFunction() const {
+  return false;
+}
+
+bool NativeRawSymbol::getAddressTaken() const {
+  return false;
+}
+
+bool NativeRawSymbol::getNoStackOrdering() const {
+  return false;
+}
+
+bool NativeRawSymbol::hasAlloca() const {
+  return false;
+}
+
+bool NativeRawSymbol::hasAssignmentOperator() const {
+  return false;
+}
+
+bool NativeRawSymbol::hasCTypes() const {
+  return false;
+}
+
+bool NativeRawSymbol::hasCastOperator() const {
+  return false;
+}
+
+bool NativeRawSymbol::hasDebugInfo() const {
+  return false;
+}
+
+bool NativeRawSymbol::hasEH() const {
+  return false;
+}
+
+bool NativeRawSymbol::hasEHa() const {
+  return false;
+}
+
+bool NativeRawSymbol::hasInlAsm() const {
+  return false;
+}
+
+bool NativeRawSymbol::hasInlineAttribute() const {
+  return false;
+}
+
+bool NativeRawSymbol::hasInterruptReturn() const {
+  return false;
+}
+
+bool NativeRawSymbol::hasFramePointer() const {
+  return false;
+}
+
+bool NativeRawSymbol::hasLongJump() const {
+  return false;
+}
+
+bool NativeRawSymbol::hasManagedCode() const {
+  return false;
+}
+
+bool NativeRawSymbol::hasNestedTypes() const {
+  return false;
+}
+
+bool NativeRawSymbol::hasNoInlineAttribute() const {
+  return false;
+}
+
+bool NativeRawSymbol::hasNoReturnAttribute() const {
+  return false;
+}
+
+bool NativeRawSymbol::hasOptimizedCodeDebugInfo() const {
+  return false;
+}
+
+bool NativeRawSymbol::hasOverloadedOperator() const {
+  return false;
+}
+
+bool NativeRawSymbol::hasSEH() const {
+  return false;
+}
+
+bool NativeRawSymbol::hasSecurityChecks() const {
+  return false;
+}
+
+bool NativeRawSymbol::hasSetJump() const {
+  return false;
+}
+
+bool NativeRawSymbol::hasStrictGSCheck() const {
+  return false;
+}
+
+bool NativeRawSymbol::isAcceleratorGroupSharedLocal() const {
+  return false;
+}
+
+bool NativeRawSymbol::isAcceleratorPointerTagLiveRange() const {
+  return false;
+}
+
+bool NativeRawSymbol::isAcceleratorStubFunction() const {
+  return false;
+}
+
+bool NativeRawSymbol::isAggregated() const {
+  return false;
+}
+
+bool NativeRawSymbol::isIntroVirtualFunction() const {
+  return false;
+}
+
+bool NativeRawSymbol::isCVTCIL() const {
+  return false;
+}
+
+bool NativeRawSymbol::isConstructorVirtualBase() const {
+  return false;
+}
+
+bool NativeRawSymbol::isCxxReturnUdt() const {
+  return false;
+}
+
+bool NativeRawSymbol::isDataAligned() const {
+  return false;
+}
+
+bool NativeRawSymbol::isHLSLData() const {
+  return false;
+}
+
+bool NativeRawSymbol::isHotpatchable() const {
+  return false;
+}
+
+bool NativeRawSymbol::isIndirectVirtualBaseClass() const {
+  return false;
+}
+
+bool NativeRawSymbol::isInterfaceUdt() const {
+  return false;
+}
+
+bool NativeRawSymbol::isIntrinsic() const {
+  return false;
+}
+
+bool NativeRawSymbol::isLTCG() const {
+  return false;
+}
+
+bool NativeRawSymbol::isLocationControlFlowDependent() const {
+  return false;
+}
+
+bool NativeRawSymbol::isMSILNetmodule() const {
+  return false;
+}
+
+bool NativeRawSymbol::isMatrixRowMajor() const {
+  return false;
+}
+
+bool NativeRawSymbol::isManagedCode() const {
+  return false;
+}
+
+bool NativeRawSymbol::isMSILCode() const {
+  return false;
+}
+
+bool NativeRawSymbol::isMultipleInheritance() const {
+  return false;
+}
+
+bool NativeRawSymbol::isNaked() const {
+  return false;
+}
+
+bool NativeRawSymbol::isNested() const {
+  return false;
+}
+
+bool NativeRawSymbol::isOptimizedAway() const {
+  return false;
+}
+
+bool NativeRawSymbol::isPacked() const {
+  return false;
+}
+
+bool NativeRawSymbol::isPointerBasedOnSymbolValue() const {
+  return false;
+}
+
+bool NativeRawSymbol::isPointerToDataMember() const {
+  return false;
+}
+
+bool NativeRawSymbol::isPointerToMemberFunction() const {
+  return false;
+}
+
+bool NativeRawSymbol::isPureVirtual() const {
+  return false;
+}
+
+bool NativeRawSymbol::isRValueReference() const {
+  return false;
+}
+
+bool NativeRawSymbol::isRefUdt() const {
+  return false;
+}
+
+bool NativeRawSymbol::isReference() const {
+  return false;
+}
+
+bool NativeRawSymbol::isRestrictedType() const {
+  return false;
+}
+
+bool NativeRawSymbol::isReturnValue() const {
+  return false;
+}
+
+bool NativeRawSymbol::isSafeBuffers() const {
+  return false;
+}
+
+bool NativeRawSymbol::isScoped() const {
+  return false;
+}
+
+bool NativeRawSymbol::isSdl() const {
+  return false;
+}
+
+bool NativeRawSymbol::isSingleInheritance() const {
+  return false;
+}
+
+bool NativeRawSymbol::isSplitted() const {
+  return false;
+}
+
+bool NativeRawSymbol::isStatic() const {
+  return false;
+}
+
+bool NativeRawSymbol::hasPrivateSymbols() const {
+  return false;
+}
+
+bool NativeRawSymbol::isUnalignedType() const {
+  return false;
+}
+
+bool NativeRawSymbol::isUnreached() const {
+  return false;
+}
+
+bool NativeRawSymbol::isValueUdt() const {
+  return false;
+}
+
+bool NativeRawSymbol::isVirtual() const {
+  return false;
+}
+
+bool NativeRawSymbol::isVirtualBaseClass() const {
+  return false;
+}
+
+bool NativeRawSymbol::isVirtualInheritance() const {
+  return false;
+}
+
+bool NativeRawSymbol::isVolatileType() const {
+  return false;
+}
+
+bool NativeRawSymbol::wasInlined() const {
+  return false;
+}
+
+std::string NativeRawSymbol::getUnused() const {
+  return {};
+}
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Native/NativeSession.cpp b/contrib/llvm/lib/DebugInfo/PDB/Native/NativeSession.cpp
new file mode 100644
index 0000000..76de0d8
--- /dev/null
+++ b/contrib/llvm/lib/DebugInfo/PDB/Native/NativeSession.cpp
@@ -0,0 +1,218 @@
+//===- NativeSession.cpp - Native implementation of IPDBSession -*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/PDB/Native/NativeSession.h"
+
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/DebugInfo/CodeView/TypeIndex.h"
+#include "llvm/DebugInfo/PDB/GenericError.h"
+#include "llvm/DebugInfo/PDB/IPDBEnumChildren.h"
+#include "llvm/DebugInfo/PDB/IPDBSourceFile.h"
+#include "llvm/DebugInfo/PDB/Native/NativeBuiltinSymbol.h"
+#include "llvm/DebugInfo/PDB/Native/NativeCompilandSymbol.h"
+#include "llvm/DebugInfo/PDB/Native/NativeExeSymbol.h"
+#include "llvm/DebugInfo/PDB/Native/PDBFile.h"
+#include "llvm/DebugInfo/PDB/Native/RawError.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolCompiland.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolExe.h"
+#include "llvm/Support/Allocator.h"
+#include "llvm/Support/BinaryByteStream.h"
+#include "llvm/Support/Error.h"
+#include "llvm/Support/ErrorOr.h"
+#include "llvm/Support/MemoryBuffer.h"
+
+#include <algorithm>
+#include <memory>
+#include <utility>
+
+using namespace llvm;
+using namespace llvm::msf;
+using namespace llvm::pdb;
+
+namespace {
+// Maps codeview::SimpleTypeKind of a built-in type to the parameters necessary
+// to instantiate a NativeBuiltinSymbol for that type.
+static const struct BuiltinTypeEntry {
+  codeview::SimpleTypeKind Kind;
+  PDB_BuiltinType Type;
+  uint32_t Size;
+} BuiltinTypes[] = {
+    {codeview::SimpleTypeKind::Int32, PDB_BuiltinType::Int, 4},
+    {codeview::SimpleTypeKind::UInt32, PDB_BuiltinType::UInt, 4},
+    {codeview::SimpleTypeKind::UInt32Long, PDB_BuiltinType::UInt, 4},
+    {codeview::SimpleTypeKind::UInt64Quad, PDB_BuiltinType::UInt, 8},
+    {codeview::SimpleTypeKind::NarrowCharacter, PDB_BuiltinType::Char, 1},
+    {codeview::SimpleTypeKind::SignedCharacter, PDB_BuiltinType::Char, 1},
+    {codeview::SimpleTypeKind::UnsignedCharacter, PDB_BuiltinType::UInt, 1},
+    {codeview::SimpleTypeKind::UInt16Short, PDB_BuiltinType::UInt, 2},
+    {codeview::SimpleTypeKind::Boolean8, PDB_BuiltinType::Bool, 1}
+    // This table can be grown as necessary, but these are the only types we've
+    // needed so far.
+};
+} // namespace
+
+NativeSession::NativeSession(std::unique_ptr<PDBFile> PdbFile,
+                             std::unique_ptr<BumpPtrAllocator> Allocator)
+    : Pdb(std::move(PdbFile)), Allocator(std::move(Allocator)) {}
+
+NativeSession::~NativeSession() = default;
+
+Error NativeSession::createFromPdb(StringRef Path,
+                                   std::unique_ptr<IPDBSession> &Session) {
+  ErrorOr<std::unique_ptr<MemoryBuffer>> ErrorOrBuffer =
+      MemoryBuffer::getFileOrSTDIN(Path, /*FileSize=*/-1,
+                                   /*RequiresNullTerminator=*/false);
+  if (!ErrorOrBuffer)
+    return make_error<GenericError>(generic_error_code::invalid_path);
+
+  std::unique_ptr<MemoryBuffer> Buffer = std::move(*ErrorOrBuffer);
+  auto Stream = llvm::make_unique<MemoryBufferByteStream>(
+      std::move(Buffer), llvm::support::little);
+
+  auto Allocator = llvm::make_unique<BumpPtrAllocator>();
+  auto File = llvm::make_unique<PDBFile>(Path, std::move(Stream), *Allocator);
+  if (auto EC = File->parseFileHeaders())
+    return EC;
+  if (auto EC = File->parseStreamData())
+    return EC;
+
+  Session =
+      llvm::make_unique<NativeSession>(std::move(File), std::move(Allocator));
+
+  return Error::success();
+}
+
+Error NativeSession::createFromExe(StringRef Path,
+                                   std::unique_ptr<IPDBSession> &Session) {
+  return make_error<RawError>(raw_error_code::feature_unsupported);
+}
+
+std::unique_ptr<PDBSymbolCompiland>
+NativeSession::createCompilandSymbol(DbiModuleDescriptor MI) {
+  const auto Id = static_cast<SymIndexId>(SymbolCache.size());
+  SymbolCache.push_back(
+      llvm::make_unique<NativeCompilandSymbol>(*this, Id, MI));
+  return llvm::make_unique<PDBSymbolCompiland>(
+      *this, std::unique_ptr<IPDBRawSymbol>(SymbolCache[Id]->clone()));
+}
+
+SymIndexId NativeSession::findSymbolByTypeIndex(codeview::TypeIndex Index) {
+  // First see if it's already in our cache.
+  const auto Entry = TypeIndexToSymbolId.find(Index);
+  if (Entry != TypeIndexToSymbolId.end())
+    return Entry->second;
+
+  // Symbols for built-in types are created on the fly.
+  if (Index.isSimple()) {
+    // FIXME:  We will eventually need to handle pointers to other simple types,
+    // which are still simple types in the world of CodeView TypeIndexes.
+    if (Index.getSimpleMode() != codeview::SimpleTypeMode::Direct)
+      return 0;
+    const auto Kind = Index.getSimpleKind();
+    const auto It =
+        std::find_if(std::begin(BuiltinTypes), std::end(BuiltinTypes),
+                     [Kind](const BuiltinTypeEntry &Builtin) {
+                       return Builtin.Kind == Kind;
+                     });
+    if (It == std::end(BuiltinTypes))
+      return 0;
+    SymIndexId Id = SymbolCache.size();
+    SymbolCache.emplace_back(
+        llvm::make_unique<NativeBuiltinSymbol>(*this, Id, It->Type, It->Size));
+    TypeIndexToSymbolId[Index] = Id;
+    return Id;
+  }
+
+  // TODO:  Look up PDB type by type index
+
+  return 0;
+}
+
+uint64_t NativeSession::getLoadAddress() const { return 0; }
+
+void NativeSession::setLoadAddress(uint64_t Address) {}
+
+std::unique_ptr<PDBSymbolExe> NativeSession::getGlobalScope() {
+  const auto Id = static_cast<SymIndexId>(SymbolCache.size());
+  SymbolCache.push_back(llvm::make_unique<NativeExeSymbol>(*this, Id));
+  auto RawSymbol = SymbolCache[Id]->clone();
+  auto PdbSymbol(PDBSymbol::create(*this, std::move(RawSymbol)));
+  std::unique_ptr<PDBSymbolExe> ExeSymbol(
+      static_cast<PDBSymbolExe *>(PdbSymbol.release()));
+  return ExeSymbol;
+}
+
+std::unique_ptr<PDBSymbol>
+NativeSession::getSymbolById(uint32_t SymbolId) const {
+  // If the caller has a SymbolId, it'd better be in our SymbolCache.
+  return SymbolId < SymbolCache.size()
+             ? PDBSymbol::create(*this, SymbolCache[SymbolId]->clone())
+             : nullptr;
+}
+
+std::unique_ptr<PDBSymbol>
+NativeSession::findSymbolByAddress(uint64_t Address, PDB_SymType Type) const {
+  return nullptr;
+}
+
+std::unique_ptr<IPDBEnumLineNumbers>
+NativeSession::findLineNumbers(const PDBSymbolCompiland &Compiland,
+                               const IPDBSourceFile &File) const {
+  return nullptr;
+}
+
+std::unique_ptr<IPDBEnumLineNumbers>
+NativeSession::findLineNumbersByAddress(uint64_t Address,
+                                        uint32_t Length) const {
+  return nullptr;
+}
+
+std::unique_ptr<IPDBEnumSourceFiles>
+NativeSession::findSourceFiles(const PDBSymbolCompiland *Compiland,
+                               StringRef Pattern,
+                               PDB_NameSearchFlags Flags) const {
+  return nullptr;
+}
+
+std::unique_ptr<IPDBSourceFile>
+NativeSession::findOneSourceFile(const PDBSymbolCompiland *Compiland,
+                                 StringRef Pattern,
+                                 PDB_NameSearchFlags Flags) const {
+  return nullptr;
+}
+
+std::unique_ptr<IPDBEnumChildren<PDBSymbolCompiland>>
+NativeSession::findCompilandsForSourceFile(StringRef Pattern,
+                                           PDB_NameSearchFlags Flags) const {
+  return nullptr;
+}
+
+std::unique_ptr<PDBSymbolCompiland>
+NativeSession::findOneCompilandForSourceFile(StringRef Pattern,
+                                             PDB_NameSearchFlags Flags) const {
+  return nullptr;
+}
+
+std::unique_ptr<IPDBEnumSourceFiles> NativeSession::getAllSourceFiles() const {
+  return nullptr;
+}
+
+std::unique_ptr<IPDBEnumSourceFiles> NativeSession::getSourceFilesForCompiland(
+    const PDBSymbolCompiland &Compiland) const {
+  return nullptr;
+}
+
+std::unique_ptr<IPDBSourceFile>
+NativeSession::getSourceFileById(uint32_t FileId) const {
+  return nullptr;
+}
+
+std::unique_ptr<IPDBEnumDataStreams> NativeSession::getDebugStreams() const {
+  return nullptr;
+}
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Raw/PDBFile.cpp b/contrib/llvm/lib/DebugInfo/PDB/Native/PDBFile.cpp
index 5349151..0b6492e 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/Raw/PDBFile.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/Native/PDBFile.cpp
@@ -7,24 +7,25 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "llvm/DebugInfo/PDB/Native/PDBFile.h"
 #include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/STLExtras.h"
-#include "llvm/DebugInfo/MSF/MappedBlockStream.h"
 #include "llvm/DebugInfo/MSF/MSFCommon.h"
-#include "llvm/DebugInfo/MSF/StreamArray.h"
-#include "llvm/DebugInfo/MSF/StreamInterface.h"
-#include "llvm/DebugInfo/MSF/StreamReader.h"
-#include "llvm/DebugInfo/PDB/Raw/DbiStream.h"
-#include "llvm/DebugInfo/PDB/Raw/GlobalsStream.h"
-#include "llvm/DebugInfo/PDB/Raw/InfoStream.h"
-#include "llvm/DebugInfo/PDB/Raw/NameHashTable.h"
-#include "llvm/DebugInfo/PDB/Raw/PDBFile.h"
-#include "llvm/DebugInfo/PDB/Raw/PublicsStream.h"
-#include "llvm/DebugInfo/PDB/Raw/RawError.h"
-#include "llvm/DebugInfo/PDB/Raw/SymbolStream.h"
-#include "llvm/DebugInfo/PDB/Raw/TpiStream.h"
+#include "llvm/DebugInfo/MSF/MappedBlockStream.h"
+#include "llvm/DebugInfo/PDB/Native/DbiStream.h"
+#include "llvm/DebugInfo/PDB/Native/GlobalsStream.h"
+#include "llvm/DebugInfo/PDB/Native/InfoStream.h"
+#include "llvm/DebugInfo/PDB/Native/PDBStringTable.h"
+#include "llvm/DebugInfo/PDB/Native/PublicsStream.h"
+#include "llvm/DebugInfo/PDB/Native/RawError.h"
+#include "llvm/DebugInfo/PDB/Native/SymbolStream.h"
+#include "llvm/DebugInfo/PDB/Native/TpiStream.h"
+#include "llvm/Support/BinaryStream.h"
+#include "llvm/Support/BinaryStreamArray.h"
+#include "llvm/Support/BinaryStreamReader.h"
 #include "llvm/Support/Endian.h"
 #include "llvm/Support/Error.h"
+#include "llvm/Support/Path.h"
 #include <algorithm>
 #include <cassert>
 #include <cstdint>
@@ -38,12 +39,18 @@ namespace {
 typedef FixedStreamArray<support::ulittle32_t> ulittle_array;
 } // end anonymous namespace
 
-PDBFile::PDBFile(std::unique_ptr<ReadableStream> PdbFileBuffer,
+PDBFile::PDBFile(StringRef Path, std::unique_ptr<BinaryStream> PdbFileBuffer,
                  BumpPtrAllocator &Allocator)
-    : Allocator(Allocator), Buffer(std::move(PdbFileBuffer)) {}
+    : FilePath(Path), Allocator(Allocator), Buffer(std::move(PdbFileBuffer)) {}
 
 PDBFile::~PDBFile() = default;
 
+StringRef PDBFile::getFilePath() const { return FilePath; }
+
+StringRef PDBFile::getFileDirectory() const {
+  return sys::path::parent_path(FilePath);
+}
+
 uint32_t PDBFile::getBlockSize() const { return ContainerLayout.SB->BlockSize; }
 
 uint32_t PDBFile::getFreeBlockMapBlock() const {
@@ -106,7 +113,7 @@ Error PDBFile::setBlockData(uint32_t BlockIndex, uint32_t Offset,
 }
 
 Error PDBFile::parseFileHeaders() {
-  StreamReader Reader(*Buffer);
+  BinaryStreamReader Reader(*Buffer);
 
   // Initialize SB.
   const msf::SuperBlock *SB = nullptr;
@@ -139,8 +146,9 @@ Error PDBFile::parseFileHeaders() {
   // at getBlockSize() intervals, so we have to be compatible.
   // See the function fpmPn() for more information:
   // https://github.com/Microsoft/microsoft-pdb/blob/master/PDB/msf/msf.cpp#L489
-  auto FpmStream = MappedBlockStream::createFpmStream(ContainerLayout, *Buffer);
-  StreamReader FpmReader(*FpmStream);
+  auto FpmStream =
+      MappedBlockStream::createFpmStream(ContainerLayout, *Buffer, Allocator);
+  BinaryStreamReader FpmReader(*FpmStream);
   ArrayRef<uint8_t> FpmBytes;
   if (auto EC = FpmReader.readBytes(FpmBytes,
                                     msf::getFullFpmByteSize(ContainerLayout)))
@@ -177,8 +185,9 @@ Error PDBFile::parseStreamData() {
   // is exactly what we are attempting to parse.  By specifying a custom
   // subclass of IPDBStreamData which only accesses the fields that have already
   // been parsed, we can avoid this and reuse MappedBlockStream.
-  auto DS = MappedBlockStream::createDirectoryStream(ContainerLayout, *Buffer);
-  StreamReader Reader(*DS);
+  auto DS = MappedBlockStream::createDirectoryStream(ContainerLayout, *Buffer,
+                                                     Allocator);
+  BinaryStreamReader Reader(*DS);
   if (auto EC = Reader.readInteger(NumStreams))
     return EC;
 
@@ -221,6 +230,14 @@ ArrayRef<support::ulittle32_t> PDBFile::getDirectoryBlockArray() const {
   return ContainerLayout.DirectoryBlocks;
 }
 
+MSFStreamLayout PDBFile::getStreamLayout(uint32_t StreamIdx) const {
+  MSFStreamLayout Result;
+  auto Blocks = getStreamBlockList(StreamIdx);
+  Result.Blocks.assign(Blocks.begin(), Blocks.end());
+  Result.Length = getStreamByteSize(StreamIdx);
+  return Result;
+}
+
 Expected<GlobalsStream &> PDBFile::getPDBGlobalsStream() {
   if (!Globals) {
     auto DbiS = getPDBDbiStream();
@@ -229,7 +246,8 @@ Expected<GlobalsStream &> PDBFile::getPDBGlobalsStream() {
 
     auto GlobalS = safelyCreateIndexedStream(
         ContainerLayout, *Buffer, DbiS->getGlobalSymbolStreamIndex());
-    if (!GlobalS) return GlobalS.takeError();
+    if (!GlobalS)
+      return GlobalS.takeError();
     auto TempGlobals = llvm::make_unique<GlobalsStream>(std::move(*GlobalS));
     if (auto EC = TempGlobals->reload())
       return std::move(EC);
@@ -241,7 +259,8 @@ Expected<GlobalsStream &> PDBFile::getPDBGlobalsStream() {
 Expected<InfoStream &> PDBFile::getPDBInfoStream() {
   if (!Info) {
     auto InfoS = safelyCreateIndexedStream(ContainerLayout, *Buffer, StreamPDB);
-    if (!InfoS) return InfoS.takeError();
+    if (!InfoS)
+      return InfoS.takeError();
     auto TempInfo = llvm::make_unique<InfoStream>(std::move(*InfoS));
     if (auto EC = TempInfo->reload())
       return std::move(EC);
@@ -253,7 +272,8 @@ Expected<InfoStream &> PDBFile::getPDBInfoStream() {
 Expected<DbiStream &> PDBFile::getPDBDbiStream() {
   if (!Dbi) {
     auto DbiS = safelyCreateIndexedStream(ContainerLayout, *Buffer, StreamDBI);
-    if (!DbiS) return DbiS.takeError();
+    if (!DbiS)
+      return DbiS.takeError();
     auto TempDbi = llvm::make_unique<DbiStream>(*this, std::move(*DbiS));
     if (auto EC = TempDbi->reload())
       return std::move(EC);
@@ -265,7 +285,8 @@ Expected<DbiStream &> PDBFile::getPDBDbiStream() {
 Expected<TpiStream &> PDBFile::getPDBTpiStream() {
   if (!Tpi) {
     auto TpiS = safelyCreateIndexedStream(ContainerLayout, *Buffer, StreamTPI);
-    if (!TpiS) return TpiS.takeError();
+    if (!TpiS)
+      return TpiS.takeError();
     auto TempTpi = llvm::make_unique<TpiStream>(*this, std::move(*TpiS));
     if (auto EC = TempTpi->reload())
       return std::move(EC);
@@ -277,7 +298,8 @@ Expected<TpiStream &> PDBFile::getPDBTpiStream() {
 Expected<TpiStream &> PDBFile::getPDBIpiStream() {
   if (!Ipi) {
     auto IpiS = safelyCreateIndexedStream(ContainerLayout, *Buffer, StreamIPI);
-    if (!IpiS) return IpiS.takeError();
+    if (!IpiS)
+      return IpiS.takeError();
     auto TempIpi = llvm::make_unique<TpiStream>(*this, std::move(*IpiS));
     if (auto EC = TempIpi->reload())
       return std::move(EC);
@@ -294,7 +316,8 @@ Expected<PublicsStream &> PDBFile::getPDBPublicsStream() {
 
     auto PublicS = safelyCreateIndexedStream(
         ContainerLayout, *Buffer, DbiS->getPublicSymbolStreamIndex());
-    if (!PublicS) return PublicS.takeError();
+    if (!PublicS)
+      return PublicS.takeError();
     auto TempPublics =
         llvm::make_unique<PublicsStream>(*this, std::move(*PublicS));
     if (auto EC = TempPublics->reload())
@@ -313,7 +336,8 @@ Expected<SymbolStream &> PDBFile::getPDBSymbolStream() {
     uint32_t SymbolStreamNum = DbiS->getSymRecordStreamIndex();
     auto SymbolS =
         safelyCreateIndexedStream(ContainerLayout, *Buffer, SymbolStreamNum);
-    if (!SymbolS) return SymbolS.takeError();
+    if (!SymbolS)
+      return SymbolS.takeError();
 
     auto TempSymbols = llvm::make_unique<SymbolStream>(std::move(*SymbolS));
     if (auto EC = TempSymbols->reload())
@@ -323,8 +347,8 @@ Expected<SymbolStream &> PDBFile::getPDBSymbolStream() {
   return *Symbols;
 }
 
-Expected<NameHashTable &> PDBFile::getStringTable() {
-  if (!StringTable || !StringTableStream) {
+Expected<PDBStringTable &> PDBFile::getStringTable() {
+  if (!Strings) {
     auto IS = getPDBInfoStream();
     if (!IS)
       return IS.takeError();
@@ -333,23 +357,39 @@ Expected<NameHashTable &> PDBFile::getStringTable() {
 
     auto NS =
         safelyCreateIndexedStream(ContainerLayout, *Buffer, NameStreamIndex);
-    if (!NS) return NS.takeError();
+    if (!NS)
+      return NS.takeError();
 
-    StreamReader Reader(**NS);
-    auto N = llvm::make_unique<NameHashTable>();
-    if (auto EC = N->load(Reader))
+    auto N = llvm::make_unique<PDBStringTable>();
+    BinaryStreamReader Reader(**NS);
+    if (auto EC = N->reload(Reader))
       return std::move(EC);
-    StringTable = std::move(N);
+    assert(Reader.bytesRemaining() == 0);
     StringTableStream = std::move(*NS);
+    Strings = std::move(N);
   }
-  return *StringTable;
+  return *Strings;
+}
+
+uint32_t PDBFile::getPointerSize() {
+  auto DbiS = getPDBDbiStream();
+  if (!DbiS)
+    return 0;
+  PDB_Machine Machine = DbiS->getMachineType();
+  if (Machine == PDB_Machine::Amd64)
+    return 8;
+  return 4;
 }
 
 bool PDBFile::hasPDBDbiStream() const { return StreamDBI < getNumStreams(); }
 
 bool PDBFile::hasPDBGlobalsStream() {
   auto DbiS = getPDBDbiStream();
-  if (!DbiS) return false;
+  if (!DbiS) {
+    consumeError(DbiS.takeError());
+    return false;
+  }
+
   return DbiS->getGlobalSymbolStreamIndex() < getNumStreams();
 }
 
@@ -359,33 +399,39 @@ bool PDBFile::hasPDBIpiStream() const { return StreamIPI < getNumStreams(); }
 
 bool PDBFile::hasPDBPublicsStream() {
   auto DbiS = getPDBDbiStream();
-  if (!DbiS) return false;
+  if (!DbiS) {
+    consumeError(DbiS.takeError());
+    return false;
+  }
   return DbiS->getPublicSymbolStreamIndex() < getNumStreams();
 }
 
 bool PDBFile::hasPDBSymbolStream() {
   auto DbiS = getPDBDbiStream();
-  if (!DbiS) return false;
+  if (!DbiS)
+    return false;
   return DbiS->getSymRecordStreamIndex() < getNumStreams();
 }
 
 bool PDBFile::hasPDBTpiStream() const { return StreamTPI < getNumStreams(); }
 
-bool PDBFile::hasStringTable() {
+bool PDBFile::hasPDBStringTable() {
   auto IS = getPDBInfoStream();
-  if (!IS) return false;
+  if (!IS)
+    return false;
   return IS->getNamedStreamIndex("/names") < getNumStreams();
 }
 
-/// Wrapper around MappedBlockStream::createIndexedStream()
-/// that checks if a stream with that index actually exists.
-/// If it does not, the return value will have an MSFError with
-/// code msf_error_code::no_stream. Else, the return value will
-/// contain the stream returned by createIndexedStream().
-Expected<std::unique_ptr<MappedBlockStream>> PDBFile::safelyCreateIndexedStream(
-    const MSFLayout &Layout, const ReadableStream &MsfData,
-    uint32_t StreamIndex) const {
+/// Wrapper around MappedBlockStream::createIndexedStream() that checks if a
+/// stream with that index actually exists.  If it does not, the return value
+/// will have an MSFError with code msf_error_code::no_stream.  Else, the return
+/// value will contain the stream returned by createIndexedStream().
+Expected<std::unique_ptr<MappedBlockStream>>
+PDBFile::safelyCreateIndexedStream(const MSFLayout &Layout,
+                                   BinaryStreamRef MsfData,
+                                   uint32_t StreamIndex) const {
   if (StreamIndex >= getNumStreams())
     return make_error<RawError>(raw_error_code::no_stream);
-  return MappedBlockStream::createIndexedStream(Layout, MsfData, StreamIndex);
+  return MappedBlockStream::createIndexedStream(Layout, MsfData, StreamIndex,
+                                                Allocator);
 }
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Native/PDBFileBuilder.cpp b/contrib/llvm/lib/DebugInfo/PDB/Native/PDBFileBuilder.cpp
new file mode 100644
index 0000000..9f35fd7
--- /dev/null
+++ b/contrib/llvm/lib/DebugInfo/PDB/Native/PDBFileBuilder.cpp
@@ -0,0 +1,221 @@
+//===- PDBFileBuilder.cpp - PDB File Creation -------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/PDB/Native/PDBFileBuilder.h"
+
+#include "llvm/ADT/BitVector.h"
+
+#include "llvm/DebugInfo/MSF/MSFBuilder.h"
+#include "llvm/DebugInfo/PDB/GenericError.h"
+#include "llvm/DebugInfo/PDB/Native/DbiStream.h"
+#include "llvm/DebugInfo/PDB/Native/DbiStreamBuilder.h"
+#include "llvm/DebugInfo/PDB/Native/InfoStream.h"
+#include "llvm/DebugInfo/PDB/Native/InfoStreamBuilder.h"
+#include "llvm/DebugInfo/PDB/Native/PDBStringTableBuilder.h"
+#include "llvm/DebugInfo/PDB/Native/PublicsStreamBuilder.h"
+#include "llvm/DebugInfo/PDB/Native/RawError.h"
+#include "llvm/DebugInfo/PDB/Native/TpiStream.h"
+#include "llvm/DebugInfo/PDB/Native/TpiStreamBuilder.h"
+#include "llvm/Support/BinaryStream.h"
+#include "llvm/Support/BinaryStreamWriter.h"
+
+using namespace llvm;
+using namespace llvm::codeview;
+using namespace llvm::msf;
+using namespace llvm::pdb;
+using namespace llvm::support;
+
+PDBFileBuilder::PDBFileBuilder(BumpPtrAllocator &Allocator)
+    : Allocator(Allocator) {}
+
+PDBFileBuilder::~PDBFileBuilder() {}
+
+Error PDBFileBuilder::initialize(uint32_t BlockSize) {
+  auto ExpectedMsf = MSFBuilder::create(Allocator, BlockSize);
+  if (!ExpectedMsf)
+    return ExpectedMsf.takeError();
+  Msf = llvm::make_unique<MSFBuilder>(std::move(*ExpectedMsf));
+  return Error::success();
+}
+
+MSFBuilder &PDBFileBuilder::getMsfBuilder() { return *Msf; }
+
+InfoStreamBuilder &PDBFileBuilder::getInfoBuilder() {
+  if (!Info)
+    Info = llvm::make_unique<InfoStreamBuilder>(*Msf, NamedStreams);
+  return *Info;
+}
+
+DbiStreamBuilder &PDBFileBuilder::getDbiBuilder() {
+  if (!Dbi)
+    Dbi = llvm::make_unique<DbiStreamBuilder>(*Msf);
+  return *Dbi;
+}
+
+TpiStreamBuilder &PDBFileBuilder::getTpiBuilder() {
+  if (!Tpi)
+    Tpi = llvm::make_unique<TpiStreamBuilder>(*Msf, StreamTPI);
+  return *Tpi;
+}
+
+TpiStreamBuilder &PDBFileBuilder::getIpiBuilder() {
+  if (!Ipi)
+    Ipi = llvm::make_unique<TpiStreamBuilder>(*Msf, StreamIPI);
+  return *Ipi;
+}
+
+PDBStringTableBuilder &PDBFileBuilder::getStringTableBuilder() {
+  return Strings;
+}
+
+PublicsStreamBuilder &PDBFileBuilder::getPublicsBuilder() {
+  if (!Publics)
+    Publics = llvm::make_unique<PublicsStreamBuilder>(*Msf);
+  return *Publics;
+}
+
+Error PDBFileBuilder::addNamedStream(StringRef Name, uint32_t Size) {
+  auto ExpectedStream = Msf->addStream(Size);
+  if (!ExpectedStream)
+    return ExpectedStream.takeError();
+  NamedStreams.set(Name, *ExpectedStream);
+  return Error::success();
+}
+
+Expected<msf::MSFLayout> PDBFileBuilder::finalizeMsfLayout() {
+
+  if (Ipi && Ipi->getRecordCount() > 0) {
+    // In theory newer PDBs always have an ID stream, but by saying that we're
+    // only going to *really* have an ID stream if there is at least one ID
+    // record, we leave open the opportunity to test older PDBs such as those
+    // that don't have an ID stream.
+    auto &Info = getInfoBuilder();
+    Info.addFeature(PdbRaw_FeatureSig::VC140);
+  }
+
+  uint32_t StringsLen = Strings.calculateSerializedSize();
+
+  if (auto EC = addNamedStream("/names", StringsLen))
+    return std::move(EC);
+  if (auto EC = addNamedStream("/LinkInfo", 0))
+    return std::move(EC);
+
+  if (Info) {
+    if (auto EC = Info->finalizeMsfLayout())
+      return std::move(EC);
+  }
+  if (Dbi) {
+    if (auto EC = Dbi->finalizeMsfLayout())
+      return std::move(EC);
+  }
+  if (Tpi) {
+    if (auto EC = Tpi->finalizeMsfLayout())
+      return std::move(EC);
+  }
+  if (Ipi) {
+    if (auto EC = Ipi->finalizeMsfLayout())
+      return std::move(EC);
+  }
+  if (Publics) {
+    if (auto EC = Publics->finalizeMsfLayout())
+      return std::move(EC);
+    if (Dbi) {
+      Dbi->setPublicsStreamIndex(Publics->getStreamIndex());
+      Dbi->setSymbolRecordStreamIndex(Publics->getRecordStreamIdx());
+    }
+  }
+
+  return Msf->build();
+}
+
+Expected<uint32_t> PDBFileBuilder::getNamedStreamIndex(StringRef Name) const {
+  uint32_t SN = 0;
+  if (!NamedStreams.get(Name, SN))
+    return llvm::make_error<pdb::RawError>(raw_error_code::no_stream);
+  return SN;
+}
+
+Error PDBFileBuilder::commit(StringRef Filename) {
+  assert(!Filename.empty());
+  auto ExpectedLayout = finalizeMsfLayout();
+  if (!ExpectedLayout)
+    return ExpectedLayout.takeError();
+  auto &Layout = *ExpectedLayout;
+
+  uint64_t Filesize = Layout.SB->BlockSize * Layout.SB->NumBlocks;
+  auto OutFileOrError = FileOutputBuffer::create(Filename, Filesize);
+  if (OutFileOrError.getError())
+    return llvm::make_error<pdb::GenericError>(generic_error_code::invalid_path,
+                                               Filename);
+  FileBufferByteStream Buffer(std::move(*OutFileOrError),
+                              llvm::support::little);
+  BinaryStreamWriter Writer(Buffer);
+
+  if (auto EC = Writer.writeObject(*Layout.SB))
+    return EC;
+  uint32_t BlockMapOffset =
+      msf::blockToOffset(Layout.SB->BlockMapAddr, Layout.SB->BlockSize);
+  Writer.setOffset(BlockMapOffset);
+  if (auto EC = Writer.writeArray(Layout.DirectoryBlocks))
+    return EC;
+
+  auto DirStream = WritableMappedBlockStream::createDirectoryStream(
+      Layout, Buffer, Allocator);
+  BinaryStreamWriter DW(*DirStream);
+  if (auto EC = DW.writeInteger<uint32_t>(Layout.StreamSizes.size()))
+    return EC;
+
+  if (auto EC = DW.writeArray(Layout.StreamSizes))
+    return EC;
+
+  for (const auto &Blocks : Layout.StreamMap) {
+    if (auto EC = DW.writeArray(Blocks))
+      return EC;
+  }
+
+  auto ExpectedSN = getNamedStreamIndex("/names");
+  if (!ExpectedSN)
+    return ExpectedSN.takeError();
+
+  auto NS = WritableMappedBlockStream::createIndexedStream(
+      Layout, Buffer, *ExpectedSN, Allocator);
+  BinaryStreamWriter NSWriter(*NS);
+  if (auto EC = Strings.commit(NSWriter))
+    return EC;
+
+  if (Info) {
+    if (auto EC = Info->commit(Layout, Buffer))
+      return EC;
+  }
+
+  if (Dbi) {
+    if (auto EC = Dbi->commit(Layout, Buffer))
+      return EC;
+  }
+
+  if (Tpi) {
+    if (auto EC = Tpi->commit(Layout, Buffer))
+      return EC;
+  }
+
+  if (Ipi) {
+    if (auto EC = Ipi->commit(Layout, Buffer))
+      return EC;
+  }
+
+  if (Publics) {
+    auto PS = WritableMappedBlockStream::createIndexedStream(
+        Layout, Buffer, Publics->getStreamIndex(), Allocator);
+    BinaryStreamWriter PSWriter(*PS);
+    if (auto EC = Publics->commit(PSWriter))
+      return EC;
+  }
+
+  return Buffer.commit();
+}
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Native/PDBStringTable.cpp b/contrib/llvm/lib/DebugInfo/PDB/Native/PDBStringTable.cpp
new file mode 100644
index 0000000..acd45f7
--- /dev/null
+++ b/contrib/llvm/lib/DebugInfo/PDB/Native/PDBStringTable.cpp
@@ -0,0 +1,139 @@
+//===- PDBStringTable.cpp - PDB String Table ---------------------*- C++-*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/PDB/Native/PDBStringTable.h"
+
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/DebugInfo/MSF/MappedBlockStream.h"
+#include "llvm/DebugInfo/PDB/Native/Hash.h"
+#include "llvm/DebugInfo/PDB/Native/RawError.h"
+#include "llvm/DebugInfo/PDB/Native/RawTypes.h"
+#include "llvm/Support/BinaryStreamReader.h"
+#include "llvm/Support/Endian.h"
+
+using namespace llvm;
+using namespace llvm::support;
+using namespace llvm::pdb;
+
+uint32_t PDBStringTable::getByteSize() const { return Header->ByteSize; }
+uint32_t PDBStringTable::getNameCount() const { return NameCount; }
+uint32_t PDBStringTable::getHashVersion() const { return Header->HashVersion; }
+uint32_t PDBStringTable::getSignature() const { return Header->Signature; }
+
+Error PDBStringTable::readHeader(BinaryStreamReader &Reader) {
+  if (auto EC = Reader.readObject(Header))
+    return EC;
+
+  if (Header->Signature != PDBStringTableSignature)
+    return make_error<RawError>(raw_error_code::corrupt_file,
+                                "Invalid hash table signature");
+  if (Header->HashVersion != 1 && Header->HashVersion != 2)
+    return make_error<RawError>(raw_error_code::corrupt_file,
+                                "Unsupported hash version");
+
+  assert(Reader.bytesRemaining() == 0);
+  return Error::success();
+}
+
+Error PDBStringTable::readStrings(BinaryStreamReader &Reader) {
+  BinaryStreamRef Stream;
+  if (auto EC = Reader.readStreamRef(Stream))
+    return EC;
+
+  if (auto EC = Strings.initialize(Stream)) {
+    return joinErrors(std::move(EC),
+                      make_error<RawError>(raw_error_code::corrupt_file,
+                                           "Invalid hash table byte length"));
+  }
+
+  assert(Reader.bytesRemaining() == 0);
+  return Error::success();
+}
+
+const codeview::DebugStringTableSubsectionRef &
+PDBStringTable::getStringTable() const {
+  return Strings;
+}
+
+Error PDBStringTable::readHashTable(BinaryStreamReader &Reader) {
+  const support::ulittle32_t *HashCount;
+  if (auto EC = Reader.readObject(HashCount))
+    return EC;
+
+  if (auto EC = Reader.readArray(IDs, *HashCount)) {
+    return joinErrors(std::move(EC),
+                      make_error<RawError>(raw_error_code::corrupt_file,
+                                           "Could not read bucket array"));
+  }
+
+  return Error::success();
+}
+
+Error PDBStringTable::readEpilogue(BinaryStreamReader &Reader) {
+  if (auto EC = Reader.readInteger(NameCount))
+    return EC;
+
+  assert(Reader.bytesRemaining() == 0);
+  return Error::success();
+}
+
+Error PDBStringTable::reload(BinaryStreamReader &Reader) {
+
+  BinaryStreamReader SectionReader;
+
+  std::tie(SectionReader, Reader) = Reader.split(sizeof(PDBStringTableHeader));
+  if (auto EC = readHeader(SectionReader))
+    return EC;
+
+  std::tie(SectionReader, Reader) = Reader.split(Header->ByteSize);
+  if (auto EC = readStrings(SectionReader))
+    return EC;
+
+  // We don't know how long the hash table is until we parse it, so let the
+  // function responsible for doing that figure it out.
+  if (auto EC = readHashTable(Reader))
+    return EC;
+
+  std::tie(SectionReader, Reader) = Reader.split(sizeof(uint32_t));
+  if (auto EC = readEpilogue(SectionReader))
+    return EC;
+
+  assert(Reader.bytesRemaining() == 0);
+  return Error::success();
+}
+
+Expected<StringRef> PDBStringTable::getStringForID(uint32_t ID) const {
+  return Strings.getString(ID);
+}
+
+Expected<uint32_t> PDBStringTable::getIDForString(StringRef Str) const {
+  uint32_t Hash =
+      (Header->HashVersion == 1) ? hashStringV1(Str) : hashStringV2(Str);
+  size_t Count = IDs.size();
+  uint32_t Start = Hash % Count;
+  for (size_t I = 0; I < Count; ++I) {
+    // The hash is just a starting point for the search, but if it
+    // doesn't work we should find the string no matter what, because
+    // we iterate the entire array.
+    uint32_t Index = (Start + I) % Count;
+
+    uint32_t ID = IDs[Index];
+    auto ExpectedStr = getStringForID(ID);
+    if (!ExpectedStr)
+      return ExpectedStr.takeError();
+
+    if (*ExpectedStr == Str)
+      return ID;
+  }
+  return make_error<RawError>(raw_error_code::no_entry);
+}
+
+FixedStreamArray<support::ulittle32_t> PDBStringTable::name_ids() const {
+  return IDs;
+}
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Native/PDBStringTableBuilder.cpp b/contrib/llvm/lib/DebugInfo/PDB/Native/PDBStringTableBuilder.cpp
new file mode 100644
index 0000000..90acfad
--- /dev/null
+++ b/contrib/llvm/lib/DebugInfo/PDB/Native/PDBStringTableBuilder.cpp
@@ -0,0 +1,138 @@
+//===- PDBStringTableBuilder.cpp - PDB String Table -------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/PDB/Native/PDBStringTableBuilder.h"
+
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/DebugInfo/MSF/MappedBlockStream.h"
+#include "llvm/DebugInfo/PDB/Native/Hash.h"
+#include "llvm/DebugInfo/PDB/Native/PDBFileBuilder.h"
+#include "llvm/DebugInfo/PDB/Native/RawTypes.h"
+#include "llvm/Support/BinaryStreamWriter.h"
+#include "llvm/Support/Endian.h"
+
+using namespace llvm;
+using namespace llvm::msf;
+using namespace llvm::support;
+using namespace llvm::support::endian;
+using namespace llvm::pdb;
+
+uint32_t PDBStringTableBuilder::insert(StringRef S) {
+  return Strings.insert(S);
+}
+
+static uint32_t computeBucketCount(uint32_t NumStrings) {
+  // The /names stream is basically an on-disk open-addressing hash table.
+  // Hash collisions are resolved by linear probing. We cannot make
+  // utilization 100% because it will make the linear probing extremely
+  // slow. But lower utilization wastes disk space. As a reasonable
+  // load factor, we choose 80%. We need +1 because slot 0 is reserved.
+  return (NumStrings + 1) * 1.25;
+}
+
+uint32_t PDBStringTableBuilder::calculateHashTableSize() const {
+  uint32_t Size = sizeof(uint32_t); // Hash table begins with 4-byte size field.
+  Size += sizeof(uint32_t) * computeBucketCount(Strings.size());
+
+  return Size;
+}
+
+uint32_t PDBStringTableBuilder::calculateSerializedSize() const {
+  uint32_t Size = 0;
+  Size += sizeof(PDBStringTableHeader);
+  Size += Strings.calculateSerializedSize();
+  Size += calculateHashTableSize();
+  Size += sizeof(uint32_t); // The /names stream ends with the string count.
+  return Size;
+}
+
+void PDBStringTableBuilder::setStrings(
+    const codeview::DebugStringTableSubsection &Strings) {
+  this->Strings = Strings;
+}
+
+Error PDBStringTableBuilder::writeHeader(BinaryStreamWriter &Writer) const {
+  // Write a header
+  PDBStringTableHeader H;
+  H.Signature = PDBStringTableSignature;
+  H.HashVersion = 1;
+  H.ByteSize = Strings.calculateSerializedSize();
+  if (auto EC = Writer.writeObject(H))
+    return EC;
+  assert(Writer.bytesRemaining() == 0);
+  return Error::success();
+}
+
+Error PDBStringTableBuilder::writeStrings(BinaryStreamWriter &Writer) const {
+  if (auto EC = Strings.commit(Writer))
+    return EC;
+
+  assert(Writer.bytesRemaining() == 0);
+  return Error::success();
+}
+
+Error PDBStringTableBuilder::writeHashTable(BinaryStreamWriter &Writer) const {
+  // Write a hash table.
+  uint32_t BucketCount = computeBucketCount(Strings.size());
+  if (auto EC = Writer.writeInteger(BucketCount))
+    return EC;
+  std::vector<ulittle32_t> Buckets(BucketCount);
+
+  for (auto &Pair : Strings) {
+    StringRef S = Pair.getKey();
+    uint32_t Offset = Pair.getValue();
+    uint32_t Hash = hashStringV1(S);
+
+    for (uint32_t I = 0; I != BucketCount; ++I) {
+      uint32_t Slot = (Hash + I) % BucketCount;
+      if (Slot == 0)
+        continue; // Skip reserved slot
+      if (Buckets[Slot] != 0)
+        continue;
+      Buckets[Slot] = Offset;
+      break;
+    }
+  }
+
+  if (auto EC = Writer.writeArray(ArrayRef<ulittle32_t>(Buckets)))
+    return EC;
+
+  assert(Writer.bytesRemaining() == 0);
+  return Error::success();
+}
+
+Error PDBStringTableBuilder::writeEpilogue(BinaryStreamWriter &Writer) const {
+  if (auto EC = Writer.writeInteger<uint32_t>(Strings.size()))
+    return EC;
+  assert(Writer.bytesRemaining() == 0);
+  return Error::success();
+}
+
+Error PDBStringTableBuilder::commit(BinaryStreamWriter &Writer) const {
+  BinaryStreamWriter SectionWriter;
+
+  std::tie(SectionWriter, Writer) = Writer.split(sizeof(PDBStringTableHeader));
+  if (auto EC = writeHeader(SectionWriter))
+    return EC;
+
+  std::tie(SectionWriter, Writer) =
+      Writer.split(Strings.calculateSerializedSize());
+  if (auto EC = writeStrings(SectionWriter))
+    return EC;
+
+  std::tie(SectionWriter, Writer) = Writer.split(calculateHashTableSize());
+  if (auto EC = writeHashTable(SectionWriter))
+    return EC;
+
+  std::tie(SectionWriter, Writer) = Writer.split(sizeof(uint32_t));
+  if (auto EC = writeEpilogue(SectionWriter))
+    return EC;
+
+  return Error::success();
+}
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Raw/PublicsStream.cpp b/contrib/llvm/lib/DebugInfo/PDB/Native/PublicsStream.cpp
index b31f605..9c3e654 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/Raw/PublicsStream.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/Native/PublicsStream.cpp
@@ -22,15 +22,15 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "llvm/DebugInfo/PDB/Native/PublicsStream.h"
 #include "GSI.h"
 #include "llvm/ADT/iterator_range.h"
 #include "llvm/DebugInfo/CodeView/SymbolRecord.h"
 #include "llvm/DebugInfo/MSF/MappedBlockStream.h"
-#include "llvm/DebugInfo/MSF/StreamReader.h"
-#include "llvm/DebugInfo/PDB/Raw/PDBFile.h"
-#include "llvm/DebugInfo/PDB/Raw/PublicsStream.h"
-#include "llvm/DebugInfo/PDB/Raw/RawError.h"
-#include "llvm/DebugInfo/PDB/Raw/SymbolStream.h"
+#include "llvm/DebugInfo/PDB/Native/PDBFile.h"
+#include "llvm/DebugInfo/PDB/Native/RawError.h"
+#include "llvm/DebugInfo/PDB/Native/SymbolStream.h"
+#include "llvm/Support/BinaryStreamReader.h"
 #include "llvm/Support/Endian.h"
 #include "llvm/Support/Error.h"
 #include <algorithm>
@@ -41,19 +41,6 @@ using namespace llvm::msf;
 using namespace llvm::support;
 using namespace llvm::pdb;
 
-// This is PSGSIHDR struct defined in
-// https://github.com/Microsoft/microsoft-pdb/blob/master/PDB/dbi/gsi.h
-struct PublicsStream::HeaderInfo {
-  ulittle32_t SymHash;
-  ulittle32_t AddrMap;
-  ulittle32_t NumThunks;
-  ulittle32_t SizeOfThunk;
-  ulittle16_t ISectThunkTable;
-  char Padding[2];
-  ulittle32_t OffThunkTable;
-  ulittle32_t NumSections;
-};
-
 PublicsStream::PublicsStream(PDBFile &File,
                              std::unique_ptr<MappedBlockStream> Stream)
     : Pdb(File), Stream(std::move(Stream)) {}
@@ -69,10 +56,11 @@ uint32_t PublicsStream::getAddrMap() const { return Header->AddrMap; }
 // we skip over the hash table which we believe contains information about
 // public symbols.
 Error PublicsStream::reload() {
-  StreamReader Reader(*Stream);
+  BinaryStreamReader Reader(*Stream);
 
   // Check stream size.
-  if (Reader.bytesRemaining() < sizeof(HeaderInfo) + sizeof(GSIHashHeader))
+  if (Reader.bytesRemaining() <
+      sizeof(PublicsStreamHeader) + sizeof(GSIHashHeader))
     return make_error<RawError>(raw_error_code::corrupt_file,
                                 "Publics Stream does not contain a header.");
 
@@ -105,10 +93,12 @@ Error PublicsStream::reload() {
                                            "Could not read a thunk map."));
 
   // Something called "section map" follows.
-  if (auto EC = Reader.readArray(SectionOffsets, Header->NumSections))
-    return joinErrors(std::move(EC),
-                      make_error<RawError>(raw_error_code::corrupt_file,
-                                           "Could not read a section map."));
+  if (Reader.bytesRemaining() > 0) {
+    if (auto EC = Reader.readArray(SectionOffsets, Header->NumSections))
+      return joinErrors(std::move(EC),
+                        make_error<RawError>(raw_error_code::corrupt_file,
+                                             "Could not read a section map."));
+  }
 
   if (Reader.bytesRemaining() > 0)
     return make_error<RawError>(raw_error_code::corrupt_file,
@@ -128,4 +118,13 @@ PublicsStream::getSymbols(bool *HadError) const {
   return SS.getSymbols(HadError);
 }
 
+Expected<const codeview::CVSymbolArray &>
+PublicsStream::getSymbolArray() const {
+  auto SymbolS = Pdb.getPDBSymbolStream();
+  if (!SymbolS)
+    return SymbolS.takeError();
+
+  return SymbolS->getSymbolArray();
+}
+
 Error PublicsStream::commit() { return Error::success(); }
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Native/PublicsStreamBuilder.cpp b/contrib/llvm/lib/DebugInfo/PDB/Native/PublicsStreamBuilder.cpp
new file mode 100644
index 0000000..28c4a8f
--- /dev/null
+++ b/contrib/llvm/lib/DebugInfo/PDB/Native/PublicsStreamBuilder.cpp
@@ -0,0 +1,89 @@
+//===- DbiStreamBuilder.cpp - PDB Dbi Stream Creation -----------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/PDB/Native/PublicsStreamBuilder.h"
+
+#include "llvm/DebugInfo/MSF/MSFBuilder.h"
+#include "llvm/DebugInfo/MSF/MSFCommon.h"
+#include "llvm/DebugInfo/MSF/MappedBlockStream.h"
+
+#include "GSI.h"
+
+using namespace llvm;
+using namespace llvm::msf;
+using namespace llvm::pdb;
+
+PublicsStreamBuilder::PublicsStreamBuilder(msf::MSFBuilder &Msf) : Msf(Msf) {}
+
+PublicsStreamBuilder::~PublicsStreamBuilder() {}
+
+uint32_t PublicsStreamBuilder::calculateSerializedLength() const {
+  uint32_t Size = 0;
+  Size += sizeof(PublicsStreamHeader);
+  Size += sizeof(GSIHashHeader);
+  Size += HashRecords.size() * sizeof(PSHashRecord);
+  size_t BitmapSizeInBits = alignTo(IPHR_HASH + 1, 32);
+  uint32_t NumBitmapEntries = BitmapSizeInBits / 8;
+  Size += NumBitmapEntries;
+
+  // FIXME: Account for hash buckets.  For now since we we write a zero-bitmap
+  // indicating that no hash buckets are valid, we also write zero byets of hash
+  // bucket data.
+  Size += 0;
+  return Size;
+}
+
+Error PublicsStreamBuilder::finalizeMsfLayout() {
+  Expected<uint32_t> Idx = Msf.addStream(calculateSerializedLength());
+  if (!Idx)
+    return Idx.takeError();
+  StreamIdx = *Idx;
+
+  Expected<uint32_t> RecordIdx = Msf.addStream(0);
+  if (!RecordIdx)
+    return RecordIdx.takeError();
+  RecordStreamIdx = *RecordIdx;
+  return Error::success();
+}
+
+Error PublicsStreamBuilder::commit(BinaryStreamWriter &PublicsWriter) {
+  PublicsStreamHeader PSH;
+  GSIHashHeader GSH;
+
+  // FIXME: Figure out what to put for these values.
+  PSH.AddrMap = 0;
+  PSH.ISectThunkTable = 0;
+  PSH.NumSections = 0;
+  PSH.NumThunks = 0;
+  PSH.OffThunkTable = 0;
+  PSH.SizeOfThunk = 0;
+  PSH.SymHash = 0;
+
+  GSH.VerSignature = GSIHashHeader::HdrSignature;
+  GSH.VerHdr = GSIHashHeader::HdrVersion;
+  GSH.HrSize = 0;
+  GSH.NumBuckets = 0;
+
+  if (auto EC = PublicsWriter.writeObject(PSH))
+    return EC;
+  if (auto EC = PublicsWriter.writeObject(GSH))
+    return EC;
+  if (auto EC = PublicsWriter.writeArray(makeArrayRef(HashRecords)))
+    return EC;
+
+  size_t BitmapSizeInBits = alignTo(IPHR_HASH + 1, 32);
+  uint32_t NumBitmapEntries = BitmapSizeInBits / 8;
+  std::vector<uint8_t> BitmapData(NumBitmapEntries);
+  // FIXME: Build an actual bitmap
+  if (auto EC = PublicsWriter.writeBytes(makeArrayRef(BitmapData)))
+    return EC;
+
+  // FIXME: Write actual hash buckets.
+  return Error::success();
+}
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Raw/RawError.cpp b/contrib/llvm/lib/DebugInfo/PDB/Native/RawError.cpp
index f4a5057..548289f 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/Raw/RawError.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/Native/RawError.cpp
@@ -1,4 +1,4 @@
-#include "llvm/DebugInfo/PDB/Raw/RawError.h"
+#include "llvm/DebugInfo/PDB/Native/RawError.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/ManagedStatic.h"
 
@@ -38,6 +38,8 @@ public:
       return "The entry does not exist.";
     case raw_error_code::not_writable:
       return "The PDB does not support writing.";
+    case raw_error_code::stream_too_long:
+      return "The stream was longer than expected.";
     case raw_error_code::invalid_tpi_hash:
       return "The Type record has an invalid hash value.";
     }
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Raw/SymbolStream.cpp b/contrib/llvm/lib/DebugInfo/PDB/Native/SymbolStream.cpp
index 2f3ac34..9e9ebd1 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/Raw/SymbolStream.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/Native/SymbolStream.cpp
@@ -7,16 +7,15 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "llvm/DebugInfo/PDB/Raw/SymbolStream.h"
+#include "llvm/DebugInfo/PDB/Native/SymbolStream.h"
 
 #include "llvm/DebugInfo/CodeView/CodeView.h"
 #include "llvm/DebugInfo/CodeView/TypeRecord.h"
 #include "llvm/DebugInfo/MSF/MappedBlockStream.h"
-#include "llvm/DebugInfo/MSF/StreamReader.h"
-#include "llvm/DebugInfo/PDB/Raw/PDBFile.h"
-#include "llvm/DebugInfo/PDB/Raw/RawConstants.h"
-#include "llvm/DebugInfo/PDB/Raw/RawError.h"
-
+#include "llvm/DebugInfo/PDB/Native/PDBFile.h"
+#include "llvm/DebugInfo/PDB/Native/RawConstants.h"
+#include "llvm/DebugInfo/PDB/Native/RawError.h"
+#include "llvm/Support/BinaryStreamReader.h"
 #include "llvm/Support/Endian.h"
 
 using namespace llvm;
@@ -30,7 +29,7 @@ SymbolStream::SymbolStream(std::unique_ptr<MappedBlockStream> Stream)
 SymbolStream::~SymbolStream() {}
 
 Error SymbolStream::reload() {
-  StreamReader Reader(*Stream);
+  BinaryStreamReader Reader(*Stream);
 
   if (auto EC = Reader.readArray(SymbolRecords, Stream->getLength()))
     return EC;
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Native/TpiHashing.cpp b/contrib/llvm/lib/DebugInfo/PDB/Native/TpiHashing.cpp
new file mode 100644
index 0000000..77a2d57
--- /dev/null
+++ b/contrib/llvm/lib/DebugInfo/PDB/Native/TpiHashing.cpp
@@ -0,0 +1,89 @@
+//===- TpiHashing.cpp -----------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/PDB/Native/TpiHashing.h"
+
+#include "llvm/DebugInfo/CodeView/TypeDeserializer.h"
+#include "llvm/DebugInfo/PDB/Native/Hash.h"
+#include "llvm/Support/JamCRC.h"
+
+using namespace llvm;
+using namespace llvm::codeview;
+using namespace llvm::pdb;
+
+// Corresponds to `fUDTAnon`.
+static bool isAnonymous(StringRef Name) {
+  return Name == "<unnamed-tag>" || Name == "__unnamed" ||
+         Name.endswith("::<unnamed-tag>") || Name.endswith("::__unnamed");
+}
+
+// Computes the hash for a user-defined type record. This could be a struct,
+// class, union, or enum.
+static uint32_t getHashForUdt(const TagRecord &Rec,
+                              ArrayRef<uint8_t> FullRecord) {
+  ClassOptions Opts = Rec.getOptions();
+  bool ForwardRef = bool(Opts & ClassOptions::ForwardReference);
+  bool Scoped = bool(Opts & ClassOptions::Scoped);
+  bool HasUniqueName = bool(Opts & ClassOptions::HasUniqueName);
+  bool IsAnon = HasUniqueName && isAnonymous(Rec.getName());
+
+  if (!ForwardRef && !Scoped && !IsAnon)
+    return hashStringV1(Rec.getName());
+  if (!ForwardRef && HasUniqueName && !IsAnon)
+    return hashStringV1(Rec.getUniqueName());
+  return hashBufferV8(FullRecord);
+}
+
+template <typename T>
+static Expected<uint32_t> getHashForUdt(const CVType &Rec) {
+  T Deserialized;
+  if (auto E = TypeDeserializer::deserializeAs(const_cast<CVType &>(Rec),
+                                               Deserialized))
+    return std::move(E);
+  return getHashForUdt(Deserialized, Rec.data());
+}
+
+template <typename T>
+static Expected<uint32_t> getSourceLineHash(const CVType &Rec) {
+  T Deserialized;
+  if (auto E = TypeDeserializer::deserializeAs(const_cast<CVType &>(Rec),
+                                               Deserialized))
+    return std::move(E);
+  char Buf[4];
+  support::endian::write32le(Buf, Deserialized.getUDT().getIndex());
+  return hashStringV1(StringRef(Buf, 4));
+}
+
+Expected<uint32_t> llvm::pdb::hashTypeRecord(const CVType &Rec) {
+  switch (Rec.kind()) {
+  case LF_CLASS:
+  case LF_STRUCTURE:
+  case LF_INTERFACE:
+    return getHashForUdt<ClassRecord>(Rec);
+  case LF_UNION:
+    return getHashForUdt<UnionRecord>(Rec);
+  case LF_ENUM:
+    return getHashForUdt<EnumRecord>(Rec);
+
+  case LF_UDT_SRC_LINE:
+    return getSourceLineHash<UdtSourceLineRecord>(Rec);
+  case LF_UDT_MOD_SRC_LINE:
+    return getSourceLineHash<UdtModSourceLineRecord>(Rec);
+
+  default:
+    break;
+  }
+
+  // Run CRC32 over the bytes. This corresponds to `hashBufv8`.
+  JamCRC JC(/*Init=*/0U);
+  ArrayRef<char> Bytes(reinterpret_cast<const char *>(Rec.data().data()),
+                       Rec.data().size());
+  JC.update(Bytes);
+  return JC.getCRC();
+}
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Raw/TpiStream.cpp b/contrib/llvm/lib/DebugInfo/PDB/Native/TpiStream.cpp
index a1167cd..d3ef87d 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/Raw/TpiStream.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/Native/TpiStream.cpp
@@ -7,19 +7,18 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "llvm/DebugInfo/PDB/Native/TpiStream.h"
+
 #include "llvm/ADT/iterator_range.h"
-#include "llvm/DebugInfo/CodeView/CVTypeVisitor.h"
-#include "llvm/DebugInfo/CodeView/TypeDeserializer.h"
+#include "llvm/DebugInfo/CodeView/LazyRandomTypeCollection.h"
 #include "llvm/DebugInfo/CodeView/TypeRecord.h"
-#include "llvm/DebugInfo/CodeView/TypeVisitorCallbackPipeline.h"
 #include "llvm/DebugInfo/MSF/MappedBlockStream.h"
-#include "llvm/DebugInfo/MSF/StreamReader.h"
-#include "llvm/DebugInfo/PDB/Raw/PDBFile.h"
-#include "llvm/DebugInfo/PDB/Raw/RawConstants.h"
-#include "llvm/DebugInfo/PDB/Raw/RawError.h"
-#include "llvm/DebugInfo/PDB/Raw/RawTypes.h"
-#include "llvm/DebugInfo/PDB/Raw/TpiHashing.h"
-#include "llvm/DebugInfo/PDB/Raw/TpiStream.h"
+#include "llvm/DebugInfo/PDB/Native/PDBFile.h"
+#include "llvm/DebugInfo/PDB/Native/RawConstants.h"
+#include "llvm/DebugInfo/PDB/Native/RawError.h"
+#include "llvm/DebugInfo/PDB/Native/RawTypes.h"
+#include "llvm/DebugInfo/PDB/Native/TpiHashing.h"
+#include "llvm/Support/BinaryStreamReader.h"
 #include "llvm/Support/Endian.h"
 #include "llvm/Support/Error.h"
 #include <algorithm>
@@ -32,28 +31,13 @@ using namespace llvm::support;
 using namespace llvm::msf;
 using namespace llvm::pdb;
 
-TpiStream::TpiStream(const PDBFile &File,
-                     std::unique_ptr<MappedBlockStream> Stream)
+TpiStream::TpiStream(PDBFile &File, std::unique_ptr<MappedBlockStream> Stream)
     : Pdb(File), Stream(std::move(Stream)) {}
 
 TpiStream::~TpiStream() = default;
 
-// Verifies that a given type record matches with a given hash value.
-// Currently we only verify SRC_LINE records.
-Error TpiStream::verifyHashValues() {
-  TpiHashVerifier Verifier(HashValues, Header->NumHashBuckets);
-  TypeDeserializer Deserializer;
-
-  TypeVisitorCallbackPipeline Pipeline;
-  Pipeline.addCallbackToPipeline(Deserializer);
-  Pipeline.addCallbackToPipeline(Verifier);
-
-  CVTypeVisitor Visitor(Pipeline);
-  return Visitor.visitTypeStream(TypeRecords);
-}
-
 Error TpiStream::reload() {
-  StreamReader Reader(*Stream);
+  BinaryStreamReader Reader(*Stream);
 
   if (Reader.bytesRemaining() < sizeof(TpiStreamHeader))
     return make_error<RawError>(raw_error_code::corrupt_file,
@@ -81,7 +65,13 @@ Error TpiStream::reload() {
                                 "TPI Stream Invalid number of hash buckets.");
 
   // The actual type records themselves come from this stream
-  if (auto EC = Reader.readArray(TypeRecords, Header->TypeRecordBytes))
+  if (auto EC =
+          Reader.readSubstream(TypeRecordsSubstream, Header->TypeRecordBytes))
+    return EC;
+
+  BinaryStreamReader RecordReader(TypeRecordsSubstream.StreamData);
+  if (auto EC =
+          RecordReader.readArray(TypeRecords, TypeRecordsSubstream.size()))
     return EC;
 
   // Hash indices, hash values, etc come from the hash stream.
@@ -91,21 +81,20 @@ Error TpiStream::reload() {
                                   "Invalid TPI hash stream index.");
 
     auto HS = MappedBlockStream::createIndexedStream(
-        Pdb.getMsfLayout(), Pdb.getMsfBuffer(), Header->HashStreamIndex);
-    StreamReader HSR(*HS);
+        Pdb.getMsfLayout(), Pdb.getMsfBuffer(), Header->HashStreamIndex,
+        Pdb.getAllocator());
+    BinaryStreamReader HSR(*HS);
 
+    // There should be a hash value for every type record, or no hashes at all.
     uint32_t NumHashValues =
         Header->HashValueBuffer.Length / sizeof(ulittle32_t);
-    if (NumHashValues != NumTypeRecords())
+    if (NumHashValues != getNumTypeRecords() && NumHashValues != 0)
       return make_error<RawError>(
           raw_error_code::corrupt_file,
           "TPI hash count does not match with the number of type records.");
     HSR.setOffset(Header->HashValueBuffer.Off);
     if (auto EC = HSR.readArray(HashValues, NumHashValues))
       return EC;
-    std::vector<ulittle32_t> HashValueList;
-    for (auto I : HashValues)
-      HashValueList.push_back(I);
 
     HSR.setOffset(Header->IndexOffsetBuffer.Off);
     uint32_t NumTypeIndexOffsets =
@@ -113,20 +102,17 @@ Error TpiStream::reload() {
     if (auto EC = HSR.readArray(TypeIndexOffsets, NumTypeIndexOffsets))
       return EC;
 
-    HSR.setOffset(Header->HashAdjBuffer.Off);
-    uint32_t NumHashAdjustments =
-        Header->HashAdjBuffer.Length / sizeof(TypeIndexOffset);
-    if (auto EC = HSR.readArray(HashAdjustments, NumHashAdjustments))
-      return EC;
+    if (Header->HashAdjBuffer.Length > 0) {
+      HSR.setOffset(Header->HashAdjBuffer.Off);
+      if (auto EC = HashAdjusters.load(HSR))
+        return EC;
+    }
 
     HashStream = std::move(HS);
-
-    // TPI hash table is a parallel array for the type records.
-    // Verify that the hash values match with type records.
-    if (auto EC = verifyHashValues())
-      return EC;
   }
 
+  Types = llvm::make_unique<LazyRandomTypeCollection>(
+      TypeRecords, getNumTypeRecords(), getTypeIndexOffsets());
   return Error::success();
 }
 
@@ -139,7 +125,7 @@ uint32_t TpiStream::TypeIndexBegin() const { return Header->TypeIndexBegin; }
 
 uint32_t TpiStream::TypeIndexEnd() const { return Header->TypeIndexEnd; }
 
-uint32_t TpiStream::NumTypeRecords() const {
+uint32_t TpiStream::getNumTypeRecords() const {
   return TypeIndexEnd() - TypeIndexBegin();
 }
 
@@ -151,26 +137,24 @@ uint16_t TpiStream::getTypeHashStreamAuxIndex() const {
   return Header->HashAuxStreamIndex;
 }
 
-uint32_t TpiStream::NumHashBuckets() const { return Header->NumHashBuckets; }
+uint32_t TpiStream::getNumHashBuckets() const { return Header->NumHashBuckets; }
 uint32_t TpiStream::getHashKeySize() const { return Header->HashKeySize; }
 
-FixedStreamArray<support::ulittle32_t>
-TpiStream::getHashValues() const {
+BinarySubstreamRef TpiStream::getTypeRecordsSubstream() const {
+  return TypeRecordsSubstream;
+}
+
+FixedStreamArray<support::ulittle32_t> TpiStream::getHashValues() const {
   return HashValues;
 }
 
-FixedStreamArray<TypeIndexOffset>
-TpiStream::getTypeIndexOffsets() const {
+FixedStreamArray<TypeIndexOffset> TpiStream::getTypeIndexOffsets() const {
   return TypeIndexOffsets;
 }
 
-FixedStreamArray<TypeIndexOffset>
-TpiStream::getHashAdjustments() const {
-  return HashAdjustments;
-}
+HashTable &TpiStream::getHashAdjusters() { return HashAdjusters; }
 
-iterator_range<CVTypeArray::Iterator>
-TpiStream::types(bool *HadError) const {
+CVTypeRange TpiStream::types(bool *HadError) const {
   return make_range(TypeRecords.begin(HadError), TypeRecords.end());
 }
 
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Native/TpiStreamBuilder.cpp b/contrib/llvm/lib/DebugInfo/PDB/Native/TpiStreamBuilder.cpp
new file mode 100644
index 0000000..9e943c7
--- /dev/null
+++ b/contrib/llvm/lib/DebugInfo/PDB/Native/TpiStreamBuilder.cpp
@@ -0,0 +1,177 @@
+//===- TpiStreamBuilder.cpp -   -------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/PDB/Native/TpiStreamBuilder.h"
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/DebugInfo/CodeView/TypeIndex.h"
+#include "llvm/DebugInfo/CodeView/TypeRecord.h"
+#include "llvm/DebugInfo/MSF/MSFBuilder.h"
+#include "llvm/DebugInfo/MSF/MappedBlockStream.h"
+#include "llvm/DebugInfo/PDB/Native/PDBFile.h"
+#include "llvm/DebugInfo/PDB/Native/RawError.h"
+#include "llvm/DebugInfo/PDB/Native/RawTypes.h"
+#include "llvm/DebugInfo/PDB/Native/TpiStream.h"
+#include "llvm/Support/Allocator.h"
+#include "llvm/Support/BinaryByteStream.h"
+#include "llvm/Support/BinaryStreamArray.h"
+#include "llvm/Support/BinaryStreamReader.h"
+#include "llvm/Support/BinaryStreamWriter.h"
+#include "llvm/Support/Endian.h"
+#include "llvm/Support/Error.h"
+#include <algorithm>
+#include <cstdint>
+
+using namespace llvm;
+using namespace llvm::msf;
+using namespace llvm::pdb;
+using namespace llvm::support;
+
+TpiStreamBuilder::TpiStreamBuilder(MSFBuilder &Msf, uint32_t StreamIdx)
+    : Msf(Msf), Allocator(Msf.getAllocator()), Header(nullptr), Idx(StreamIdx) {
+}
+
+TpiStreamBuilder::~TpiStreamBuilder() = default;
+
+void TpiStreamBuilder::setVersionHeader(PdbRaw_TpiVer Version) {
+  VerHeader = Version;
+}
+
+void TpiStreamBuilder::addTypeRecord(ArrayRef<uint8_t> Record,
+                                     Optional<uint32_t> Hash) {
+  // If we just crossed an 8KB threshold, add a type index offset.
+  size_t NewSize = TypeRecordBytes + Record.size();
+  constexpr size_t EightKB = 8 * 1024;
+  if (NewSize / EightKB > TypeRecordBytes / EightKB || TypeRecords.empty()) {
+    TypeIndexOffsets.push_back(
+        {codeview::TypeIndex(codeview::TypeIndex::FirstNonSimpleIndex +
+                             TypeRecords.size()),
+         ulittle32_t(TypeRecordBytes)});
+  }
+  TypeRecordBytes = NewSize;
+
+  TypeRecords.push_back(Record);
+  if (Hash)
+    TypeHashes.push_back(*Hash);
+}
+
+Error TpiStreamBuilder::finalize() {
+  if (Header)
+    return Error::success();
+
+  TpiStreamHeader *H = Allocator.Allocate<TpiStreamHeader>();
+
+  uint32_t Count = TypeRecords.size();
+
+  H->Version = VerHeader;
+  H->HeaderSize = sizeof(TpiStreamHeader);
+  H->TypeIndexBegin = codeview::TypeIndex::FirstNonSimpleIndex;
+  H->TypeIndexEnd = H->TypeIndexBegin + Count;
+  H->TypeRecordBytes = TypeRecordBytes;
+
+  H->HashStreamIndex = HashStreamIndex;
+  H->HashAuxStreamIndex = kInvalidStreamIndex;
+  H->HashKeySize = sizeof(ulittle32_t);
+  H->NumHashBuckets = MinTpiHashBuckets;
+
+  // Recall that hash values go into a completely different stream identified by
+  // the `HashStreamIndex` field of the `TpiStreamHeader`.  Therefore, the data
+  // begins at offset 0 of this independent stream.
+  H->HashValueBuffer.Off = 0;
+  H->HashValueBuffer.Length = calculateHashBufferSize();
+
+  // We never write any adjustments into our PDBs, so this is usually some
+  // offset with zero length.
+  H->HashAdjBuffer.Off = H->HashValueBuffer.Off + H->HashValueBuffer.Length;
+  H->HashAdjBuffer.Length = 0;
+
+  H->IndexOffsetBuffer.Off = H->HashAdjBuffer.Off + H->HashAdjBuffer.Length;
+  H->IndexOffsetBuffer.Length = calculateIndexOffsetSize();
+
+  Header = H;
+  return Error::success();
+}
+
+uint32_t TpiStreamBuilder::calculateSerializedLength() {
+  return sizeof(TpiStreamHeader) + TypeRecordBytes;
+}
+
+uint32_t TpiStreamBuilder::calculateHashBufferSize() const {
+  assert((TypeRecords.size() == TypeHashes.size() || TypeHashes.empty()) &&
+         "either all or no type records should have hashes");
+  return TypeHashes.size() * sizeof(ulittle32_t);
+}
+
+uint32_t TpiStreamBuilder::calculateIndexOffsetSize() const {
+  return TypeIndexOffsets.size() * sizeof(codeview::TypeIndexOffset);
+}
+
+Error TpiStreamBuilder::finalizeMsfLayout() {
+  uint32_t Length = calculateSerializedLength();
+  if (auto EC = Msf.setStreamSize(Idx, Length))
+    return EC;
+
+  uint32_t HashStreamSize =
+      calculateHashBufferSize() + calculateIndexOffsetSize();
+
+  if (HashStreamSize == 0)
+    return Error::success();
+
+  auto ExpectedIndex = Msf.addStream(HashStreamSize);
+  if (!ExpectedIndex)
+    return ExpectedIndex.takeError();
+  HashStreamIndex = *ExpectedIndex;
+  if (!TypeHashes.empty()) {
+    ulittle32_t *H = Allocator.Allocate<ulittle32_t>(TypeHashes.size());
+    MutableArrayRef<ulittle32_t> HashBuffer(H, TypeHashes.size());
+    for (uint32_t I = 0; I < TypeHashes.size(); ++I) {
+      HashBuffer[I] = TypeHashes[I] % MinTpiHashBuckets;
+    }
+    ArrayRef<uint8_t> Bytes(
+        reinterpret_cast<const uint8_t *>(HashBuffer.data()),
+        calculateHashBufferSize());
+    HashValueStream =
+        llvm::make_unique<BinaryByteStream>(Bytes, llvm::support::little);
+  }
+  return Error::success();
+}
+
+Error TpiStreamBuilder::commit(const msf::MSFLayout &Layout,
+                               WritableBinaryStreamRef Buffer) {
+  if (auto EC = finalize())
+    return EC;
+
+  auto InfoS = WritableMappedBlockStream::createIndexedStream(Layout, Buffer,
+                                                              Idx, Allocator);
+
+  BinaryStreamWriter Writer(*InfoS);
+  if (auto EC = Writer.writeObject(*Header))
+    return EC;
+
+  for (auto Rec : TypeRecords)
+    if (auto EC = Writer.writeBytes(Rec))
+      return EC;
+
+  if (HashStreamIndex != kInvalidStreamIndex) {
+    auto HVS = WritableMappedBlockStream::createIndexedStream(
+        Layout, Buffer, HashStreamIndex, Allocator);
+    BinaryStreamWriter HW(*HVS);
+    if (HashValueStream) {
+      if (auto EC = HW.writeStreamRef(*HashValueStream))
+        return EC;
+    }
+
+    for (auto &IndexOffset : TypeIndexOffsets) {
+      if (auto EC = HW.writeObject(IndexOffset))
+        return EC;
+    }
+  }
+
+  return Error::success();
+}
diff --git a/contrib/llvm/lib/DebugInfo/PDB/PDB.cpp b/contrib/llvm/lib/DebugInfo/PDB/PDB.cpp
index 0d72059..501d4f5 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/PDB.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/PDB.cpp
@@ -1,4 +1,4 @@
-//===- PDB.cpp - base header file for creating a PDB reader -----*- C++ -*-===//
+//===- PDB.cpp - base header file for creating a PDB reader ---------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -8,18 +8,14 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/DebugInfo/PDB/PDB.h"
-
 #include "llvm/ADT/StringRef.h"
 #include "llvm/Config/config.h"
 #include "llvm/DebugInfo/PDB/GenericError.h"
-#include "llvm/DebugInfo/PDB/IPDBSession.h"
-#include "llvm/DebugInfo/PDB/PDB.h"
 #if LLVM_ENABLE_DIA_SDK
 #include "llvm/DebugInfo/PDB/DIA/DIASession.h"
 #endif
-#include "llvm/DebugInfo/PDB/Raw/RawSession.h"
-#include "llvm/Support/ErrorHandling.h"
-#include "llvm/Support/ManagedStatic.h"
+#include "llvm/DebugInfo/PDB/Native/NativeSession.h"
+#include "llvm/Support/Error.h"
 
 using namespace llvm;
 using namespace llvm::pdb;
@@ -27,25 +23,25 @@ using namespace llvm::pdb;
 Error llvm::pdb::loadDataForPDB(PDB_ReaderType Type, StringRef Path,
                                 std::unique_ptr<IPDBSession> &Session) {
   // Create the correct concrete instance type based on the value of Type.
-  if (Type == PDB_ReaderType::Raw)
-    return RawSession::createFromPdb(Path, Session);
+  if (Type == PDB_ReaderType::Native)
+    return NativeSession::createFromPdb(Path, Session);
 
 #if LLVM_ENABLE_DIA_SDK
   return DIASession::createFromPdb(Path, Session);
 #else
-  return llvm::make_error<GenericError>("DIA is not installed on the system");
+  return make_error<GenericError>("DIA is not installed on the system");
 #endif
 }
 
 Error llvm::pdb::loadDataForEXE(PDB_ReaderType Type, StringRef Path,
                                 std::unique_ptr<IPDBSession> &Session) {
   // Create the correct concrete instance type based on the value of Type.
-  if (Type == PDB_ReaderType::Raw)
-    return RawSession::createFromExe(Path, Session);
+  if (Type == PDB_ReaderType::Native)
+    return NativeSession::createFromExe(Path, Session);
 
 #if LLVM_ENABLE_DIA_SDK
   return DIASession::createFromExe(Path, Session);
 #else
-  return llvm::make_error<GenericError>("DIA is not installed on the system");
+  return make_error<GenericError>("DIA is not installed on the system");
 #endif
 }
diff --git a/contrib/llvm/lib/DebugInfo/PDB/PDBContext.cpp b/contrib/llvm/lib/DebugInfo/PDB/PDBContext.cpp
index 94b81ec..df0feac 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/PDBContext.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/PDBContext.cpp
@@ -12,8 +12,8 @@
 #include "llvm/DebugInfo/PDB/IPDBLineNumber.h"
 #include "llvm/DebugInfo/PDB/IPDBSourceFile.h"
 #include "llvm/DebugInfo/PDB/PDBSymbol.h"
-#include "llvm/DebugInfo/PDB/PDBSymbolFunc.h"
 #include "llvm/DebugInfo/PDB/PDBSymbolData.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolFunc.h"
 #include "llvm/DebugInfo/PDB/PDBSymbolPublicSymbol.h"
 #include "llvm/Object/COFF.h"
 
@@ -29,8 +29,7 @@ PDBContext::PDBContext(const COFFObjectFile &Object,
     Session->setLoadAddress(ImageBase.get());
 }
 
-void PDBContext::dump(raw_ostream &OS, DIDumpType DumpType, bool DumpEH,
-                      bool SummarizeTypes) {}
+void PDBContext::dump(raw_ostream &OS, DIDumpOptions DumpOpts){}
 
 DILineInfo PDBContext::getLineInfoForAddress(uint64_t Address,
                                              DILineInfoSpecifier Specifier) {
diff --git a/contrib/llvm/lib/DebugInfo/PDB/PDBExtras.cpp b/contrib/llvm/lib/DebugInfo/PDB/PDBExtras.cpp
index b7eee6e..c291185 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/PDBExtras.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/PDBExtras.cpp
@@ -1,4 +1,4 @@
-//===- PDBExtras.cpp - helper functions and classes for PDBs -----*- C++-*-===//
+//===- PDBExtras.cpp - helper functions and classes for PDBs --------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -8,8 +8,9 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/DebugInfo/PDB/PDBExtras.h"
-
 #include "llvm/ADT/ArrayRef.h"
+#include "llvm/DebugInfo/CodeView/Formatters.h"
+#include "llvm/Support/raw_ostream.h"
 
 using namespace llvm;
 using namespace llvm::pdb;
@@ -269,25 +270,6 @@ raw_ostream &llvm::pdb::operator<<(raw_ostream &OS, const PDB_UdtType &Type) {
   return OS;
 }
 
-raw_ostream &llvm::pdb::operator<<(raw_ostream &OS, const PDB_UniqueId &Id) {
-  static const char *Lookup = "0123456789ABCDEF";
-
-  static_assert(sizeof(PDB_UniqueId) == 16, "Expected 16-byte GUID");
-  ArrayRef<uint8_t> GuidBytes(reinterpret_cast<const uint8_t*>(&Id), 16);
-  OS << "{";
-  for (int i=0; i < 16;) {
-    uint8_t Byte = GuidBytes[i];
-    uint8_t HighNibble = (Byte >> 4) & 0xF;
-    uint8_t LowNibble = Byte & 0xF;
-    OS << Lookup[HighNibble] << Lookup[LowNibble];
-    ++i;
-    if (i>=4 && i<=10 && i%2==0)
-      OS << "-";
-  }
-  OS << "}";
-  return OS;
-}
-
 raw_ostream &llvm::pdb::operator<<(raw_ostream &OS,
                                    const PDB_Machine &Machine) {
   switch (Machine) {
diff --git a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbol.cpp b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbol.cpp
index 633e11a..74010c2 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbol.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbol.cpp
@@ -10,6 +10,7 @@
 #include "llvm/DebugInfo/PDB/PDBSymbol.h"
 #include "llvm/DebugInfo/PDB/IPDBEnumChildren.h"
 #include "llvm/DebugInfo/PDB/IPDBRawSymbol.h"
+#include "llvm/DebugInfo/PDB/IPDBSession.h"
 #include "llvm/DebugInfo/PDB/PDBExtras.h"
 #include "llvm/DebugInfo/PDB/PDBSymbolAnnotation.h"
 #include "llvm/DebugInfo/PDB/PDBSymbolBlock.h"
@@ -53,6 +54,9 @@ PDBSymbol::PDBSymbol(const IPDBSession &PDBSession,
                      std::unique_ptr<IPDBRawSymbol> Symbol)
     : Session(PDBSession), RawSymbol(std::move(Symbol)) {}
 
+PDBSymbol::PDBSymbol(PDBSymbol &Symbol)
+    : Session(Symbol.Session), RawSymbol(std::move(Symbol.RawSymbol)) {}
+
 PDBSymbol::~PDBSymbol() = default;
 
 #define FACTORY_SYMTAG_CASE(Tag, Type)                                         \
@@ -99,16 +103,30 @@ PDBSymbol::create(const IPDBSession &PDBSession,
   }
 }
 
-#define TRY_DUMP_TYPE(Type)                                                    \
-  if (const Type *DerivedThis = dyn_cast<Type>(this))                          \
-    Dumper.dump(OS, Indent, *DerivedThis);
-
-#define ELSE_TRY_DUMP_TYPE(Type, Dumper) else TRY_DUMP_TYPE(Type, Dumper)
-
 void PDBSymbol::defaultDump(raw_ostream &OS, int Indent) const {
   RawSymbol->dump(OS, Indent);
 }
 
+void PDBSymbol::dumpProperties() const {
+  outs() << "\n";
+  defaultDump(outs(), 0);
+  outs().flush();
+}
+
+void PDBSymbol::dumpChildStats() const {
+  TagStats Stats;
+  getChildStats(Stats);
+  outs() << "\n";
+  for (auto &Stat : Stats) {
+    outs() << Stat.first << ": " << Stat.second << "\n";
+  }
+  outs().flush();
+}
+
+std::unique_ptr<PDBSymbol> PDBSymbol::clone() const {
+  return Session.getSymbolById(getSymIndexId());
+}
+
 PDB_SymType PDBSymbol::getSymTag() const { return RawSymbol->getSymTag(); }
 uint32_t PDBSymbol::getSymIndexId() const { return RawSymbol->getSymIndexId(); }
 
@@ -141,6 +159,8 @@ PDBSymbol::findInlineFramesByRVA(uint32_t RVA) const {
 std::unique_ptr<IPDBEnumSymbols>
 PDBSymbol::getChildStats(TagStats &Stats) const {
   std::unique_ptr<IPDBEnumSymbols> Result(findAllChildren());
+  if (!Result)
+    return nullptr;
   Stats.clear();
   while (auto Child = Result->getNext()) {
     ++Stats[Child->getSymTag()];
@@ -148,3 +168,7 @@ PDBSymbol::getChildStats(TagStats &Stats) const {
   Result->reset();
   return Result;
 }
+
+std::unique_ptr<PDBSymbol> PDBSymbol::getSymbolByIdHelper(uint32_t Id) const {
+  return Session.getSymbolById(Id);
+}
diff --git a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolAnnotation.cpp b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolAnnotation.cpp
index cdb167b..3648272 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolAnnotation.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolAnnotation.cpp
@@ -18,7 +18,9 @@ using namespace llvm::pdb;
 
 PDBSymbolAnnotation::PDBSymbolAnnotation(const IPDBSession &PDBSession,
                                          std::unique_ptr<IPDBRawSymbol> Symbol)
-    : PDBSymbol(PDBSession, std::move(Symbol)) {}
+    : PDBSymbol(PDBSession, std::move(Symbol)) {
+  assert(RawSymbol->getSymTag() == PDB_SymType::Annotation);
+}
 
 void PDBSymbolAnnotation::dump(PDBSymDumper &Dumper) const {
   Dumper.dump(*this);
diff --git a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolBlock.cpp b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolBlock.cpp
index fd5dc94..7076b4a 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolBlock.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolBlock.cpp
@@ -9,8 +9,8 @@
 
 #include "llvm/DebugInfo/PDB/PDBSymbolBlock.h"
 
-#include "llvm/DebugInfo/PDB/PDBSymbol.h"
 #include "llvm/DebugInfo/PDB/PDBSymDumper.h"
+#include "llvm/DebugInfo/PDB/PDBSymbol.h"
 
 #include <utility>
 
@@ -19,6 +19,8 @@ using namespace llvm::pdb;
 
 PDBSymbolBlock::PDBSymbolBlock(const IPDBSession &PDBSession,
                                std::unique_ptr<IPDBRawSymbol> Symbol)
-    : PDBSymbol(PDBSession, std::move(Symbol)) {}
+    : PDBSymbol(PDBSession, std::move(Symbol)) {
+  assert(RawSymbol->getSymTag() == PDB_SymType::Block);
+}
 
 void PDBSymbolBlock::dump(PDBSymDumper &Dumper) const { Dumper.dump(*this); }
diff --git a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolCompiland.cpp b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolCompiland.cpp
index ebff088..854cf42 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolCompiland.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolCompiland.cpp
@@ -19,7 +19,9 @@ using namespace llvm::pdb;
 
 PDBSymbolCompiland::PDBSymbolCompiland(const IPDBSession &PDBSession,
                                        std::unique_ptr<IPDBRawSymbol> Symbol)
-    : PDBSymbol(PDBSession, std::move(Symbol)) {}
+    : PDBSymbol(PDBSession, std::move(Symbol)) {
+  assert(RawSymbol->getSymTag() == PDB_SymType::Compiland);
+}
 
 void PDBSymbolCompiland::dump(PDBSymDumper &Dumper) const {
   Dumper.dump(*this);
diff --git a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolCompilandDetails.cpp b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolCompilandDetails.cpp
index 6dbd522..f73cd36 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolCompilandDetails.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolCompilandDetails.cpp
@@ -9,8 +9,8 @@
 
 #include "llvm/DebugInfo/PDB/PDBSymbolCompilandDetails.h"
 
-#include "llvm/DebugInfo/PDB/PDBSymbol.h"
 #include "llvm/DebugInfo/PDB/PDBSymDumper.h"
+#include "llvm/DebugInfo/PDB/PDBSymbol.h"
 
 #include <utility>
 
@@ -19,7 +19,9 @@ using namespace llvm::pdb;
 
 PDBSymbolCompilandDetails::PDBSymbolCompilandDetails(
     const IPDBSession &PDBSession, std::unique_ptr<IPDBRawSymbol> Symbol)
-    : PDBSymbol(PDBSession, std::move(Symbol)) {}
+    : PDBSymbol(PDBSession, std::move(Symbol)) {
+  assert(RawSymbol->getSymTag() == PDB_SymType::CompilandDetails);
+}
 
 void PDBSymbolCompilandDetails::dump(PDBSymDumper &Dumper) const {
   Dumper.dump(*this);
diff --git a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolCompilandEnv.cpp b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolCompilandEnv.cpp
index 9c7f0b1..df696fa 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolCompilandEnv.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolCompilandEnv.cpp
@@ -10,8 +10,8 @@
 #include "llvm/DebugInfo/PDB/PDBSymbolCompilandEnv.h"
 
 #include "llvm/DebugInfo/PDB/IPDBRawSymbol.h"
-#include "llvm/DebugInfo/PDB/PDBSymbol.h"
 #include "llvm/DebugInfo/PDB/PDBSymDumper.h"
+#include "llvm/DebugInfo/PDB/PDBSymbol.h"
 
 #include <utility>
 
@@ -20,7 +20,9 @@ using namespace llvm::pdb;
 
 PDBSymbolCompilandEnv::PDBSymbolCompilandEnv(
     const IPDBSession &PDBSession, std::unique_ptr<IPDBRawSymbol> Symbol)
-    : PDBSymbol(PDBSession, std::move(Symbol)) {}
+    : PDBSymbol(PDBSession, std::move(Symbol)) {
+  assert(RawSymbol->getSymTag() == PDB_SymType::CompilandEnv);
+}
 
 std::string PDBSymbolCompilandEnv::getValue() const {
   Variant Value = RawSymbol->getValue();
diff --git a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolCustom.cpp b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolCustom.cpp
index 0ea387a..a7b69a7 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolCustom.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolCustom.cpp
@@ -10,8 +10,8 @@
 #include "llvm/DebugInfo/PDB/PDBSymbolCustom.h"
 
 #include "llvm/DebugInfo/PDB/IPDBRawSymbol.h"
-#include "llvm/DebugInfo/PDB/PDBSymbol.h"
 #include "llvm/DebugInfo/PDB/PDBSymDumper.h"
+#include "llvm/DebugInfo/PDB/PDBSymbol.h"
 
 #include <utility>
 
@@ -20,7 +20,9 @@ using namespace llvm::pdb;
 
 PDBSymbolCustom::PDBSymbolCustom(const IPDBSession &PDBSession,
                                  std::unique_ptr<IPDBRawSymbol> CustomSymbol)
-    : PDBSymbol(PDBSession, std::move(CustomSymbol)) {}
+    : PDBSymbol(PDBSession, std::move(CustomSymbol)) {
+  assert(RawSymbol->getSymTag() == PDB_SymType::Custom);
+}
 
 void PDBSymbolCustom::getDataBytes(llvm::SmallVector<uint8_t, 32> &bytes) {
   RawSymbol->getDataBytes(bytes);
diff --git a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolData.cpp b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolData.cpp
index 62bb6f3..6002668 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolData.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolData.cpp
@@ -19,10 +19,8 @@ using namespace llvm::pdb;
 
 PDBSymbolData::PDBSymbolData(const IPDBSession &PDBSession,
                              std::unique_ptr<IPDBRawSymbol> DataSymbol)
-    : PDBSymbol(PDBSession, std::move(DataSymbol)) {}
-
-std::unique_ptr<PDBSymbol> PDBSymbolData::getType() const {
-  return Session.getSymbolById(getTypeId());
+    : PDBSymbol(PDBSession, std::move(DataSymbol)) {
+  assert(RawSymbol->getSymTag() == PDB_SymType::Data);
 }
 
 void PDBSymbolData::dump(PDBSymDumper &Dumper) const { Dumper.dump(*this); }
diff --git a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolExe.cpp b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolExe.cpp
index 60101c1..7417167 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolExe.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolExe.cpp
@@ -10,6 +10,7 @@
 #include "llvm/DebugInfo/PDB/PDBSymbolExe.h"
 
 #include "llvm/DebugInfo/PDB/PDBSymDumper.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypePointer.h"
 
 #include <utility>
 
@@ -18,6 +19,18 @@ using namespace llvm::pdb;
 
 PDBSymbolExe::PDBSymbolExe(const IPDBSession &PDBSession,
                            std::unique_ptr<IPDBRawSymbol> Symbol)
-    : PDBSymbol(PDBSession, std::move(Symbol)) {}
+    : PDBSymbol(PDBSession, std::move(Symbol)) {
+  assert(RawSymbol->getSymTag() == PDB_SymType::Exe);
+}
 
 void PDBSymbolExe::dump(PDBSymDumper &Dumper) const { Dumper.dump(*this); }
+
+uint32_t PDBSymbolExe::getPointerByteSize() const {
+  auto Pointer = findOneChild<PDBSymbolTypePointer>();
+  if (Pointer)
+    return Pointer->getLength();
+
+  if (getMachineType() == PDB_Machine::x86)
+    return 4;
+  return 8;
+}
diff --git a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolFunc.cpp b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolFunc.cpp
index 35251c0..5a5cb4c 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolFunc.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolFunc.cpp
@@ -12,10 +12,10 @@
 #include "llvm/DebugInfo/PDB/ConcreteSymbolEnumerator.h"
 #include "llvm/DebugInfo/PDB/IPDBEnumChildren.h"
 #include "llvm/DebugInfo/PDB/IPDBSession.h"
+#include "llvm/DebugInfo/PDB/PDBSymDumper.h"
 #include "llvm/DebugInfo/PDB/PDBSymbolData.h"
 #include "llvm/DebugInfo/PDB/PDBSymbolTypeFunctionSig.h"
 #include "llvm/DebugInfo/PDB/PDBSymbolTypeUDT.h"
-#include "llvm/DebugInfo/PDB/PDBSymDumper.h"
 #include "llvm/DebugInfo/PDB/PDBTypes.h"
 
 #include <unordered_set>
@@ -85,10 +85,8 @@ private:
 
 PDBSymbolFunc::PDBSymbolFunc(const IPDBSession &PDBSession,
                              std::unique_ptr<IPDBRawSymbol> Symbol)
-    : PDBSymbol(PDBSession, std::move(Symbol)) {}
-
-std::unique_ptr<PDBSymbolTypeFunctionSig> PDBSymbolFunc::getSignature() const {
-  return Session.getConcreteSymbolById<PDBSymbolTypeFunctionSig>(getTypeId());
+    : PDBSymbol(PDBSession, std::move(Symbol)) {
+  assert(RawSymbol->getSymTag() == PDB_SymType::Function);
 }
 
 std::unique_ptr<IPDBEnumChildren<PDBSymbolData>>
@@ -96,8 +94,15 @@ PDBSymbolFunc::getArguments() const {
   return llvm::make_unique<FunctionArgEnumerator>(Session, *this);
 }
 
-std::unique_ptr<PDBSymbolTypeUDT> PDBSymbolFunc::getClassParent() const {
-  return Session.getConcreteSymbolById<PDBSymbolTypeUDT>(getClassParentId());
-}
-
 void PDBSymbolFunc::dump(PDBSymDumper &Dumper) const { Dumper.dump(*this); }
+
+bool PDBSymbolFunc::isDestructor() const {
+  std::string Name = getName();
+  if (Name.empty())
+    return false;
+  if (Name[0] == '~')
+    return true;
+  if (Name == "__vecDelDtor")
+    return true;
+  return false;
+}
diff --git a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolFuncDebugEnd.cpp b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolFuncDebugEnd.cpp
index 77e996f..4a4195b 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolFuncDebugEnd.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolFuncDebugEnd.cpp
@@ -9,8 +9,8 @@
 
 #include "llvm/DebugInfo/PDB/PDBSymbolFuncDebugEnd.h"
 
-#include "llvm/DebugInfo/PDB/PDBSymbol.h"
 #include "llvm/DebugInfo/PDB/PDBSymDumper.h"
+#include "llvm/DebugInfo/PDB/PDBSymbol.h"
 
 #include <utility>
 
@@ -19,7 +19,9 @@ using namespace llvm::pdb;
 
 PDBSymbolFuncDebugEnd::PDBSymbolFuncDebugEnd(
     const IPDBSession &PDBSession, std::unique_ptr<IPDBRawSymbol> Symbol)
-    : PDBSymbol(PDBSession, std::move(Symbol)) {}
+    : PDBSymbol(PDBSession, std::move(Symbol)) {
+  assert(RawSymbol->getSymTag() == PDB_SymType::FuncDebugEnd);
+}
 
 void PDBSymbolFuncDebugEnd::dump(PDBSymDumper &Dumper) const {
   Dumper.dump(*this);
diff --git a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolFuncDebugStart.cpp b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolFuncDebugStart.cpp
index 9c65387..a448a40 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolFuncDebugStart.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolFuncDebugStart.cpp
@@ -9,8 +9,8 @@
 
 #include "llvm/DebugInfo/PDB/PDBSymbolFuncDebugStart.h"
 
-#include "llvm/DebugInfo/PDB/PDBSymbol.h"
 #include "llvm/DebugInfo/PDB/PDBSymDumper.h"
+#include "llvm/DebugInfo/PDB/PDBSymbol.h"
 
 #include <utility>
 
@@ -19,7 +19,9 @@ using namespace llvm::pdb;
 
 PDBSymbolFuncDebugStart::PDBSymbolFuncDebugStart(
     const IPDBSession &PDBSession, std::unique_ptr<IPDBRawSymbol> Symbol)
-    : PDBSymbol(PDBSession, std::move(Symbol)) {}
+    : PDBSymbol(PDBSession, std::move(Symbol)) {
+  assert(RawSymbol->getSymTag() == PDB_SymType::FuncDebugStart);
+}
 
 void PDBSymbolFuncDebugStart::dump(PDBSymDumper &Dumper) const {
   Dumper.dump(*this);
diff --git a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolLabel.cpp b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolLabel.cpp
index d2cfd11..a67a20d 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolLabel.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolLabel.cpp
@@ -18,6 +18,8 @@ using namespace llvm::pdb;
 
 PDBSymbolLabel::PDBSymbolLabel(const IPDBSession &PDBSession,
                                std::unique_ptr<IPDBRawSymbol> Symbol)
-    : PDBSymbol(PDBSession, std::move(Symbol)) {}
+    : PDBSymbol(PDBSession, std::move(Symbol)) {
+  assert(RawSymbol->getSymTag() == PDB_SymType::Label);
+}
 
 void PDBSymbolLabel::dump(PDBSymDumper &Dumper) const { Dumper.dump(*this); }
diff --git a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolPublicSymbol.cpp b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolPublicSymbol.cpp
index 97d6687..dbec16f 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolPublicSymbol.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolPublicSymbol.cpp
@@ -9,8 +9,8 @@
 
 #include "llvm/DebugInfo/PDB/PDBSymbolPublicSymbol.h"
 
-#include "llvm/DebugInfo/PDB/PDBSymbol.h"
 #include "llvm/DebugInfo/PDB/PDBSymDumper.h"
+#include "llvm/DebugInfo/PDB/PDBSymbol.h"
 
 #include <utility>
 
@@ -19,7 +19,9 @@ using namespace llvm::pdb;
 
 PDBSymbolPublicSymbol::PDBSymbolPublicSymbol(
     const IPDBSession &PDBSession, std::unique_ptr<IPDBRawSymbol> Symbol)
-    : PDBSymbol(PDBSession, std::move(Symbol)) {}
+    : PDBSymbol(PDBSession, std::move(Symbol)) {
+  assert(RawSymbol->getSymTag() == PDB_SymType::PublicSymbol);
+}
 
 void PDBSymbolPublicSymbol::dump(PDBSymDumper &Dumper) const {
   Dumper.dump(*this);
diff --git a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolThunk.cpp b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolThunk.cpp
index ef8897d..b264819 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolThunk.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolThunk.cpp
@@ -18,6 +18,8 @@ using namespace llvm::pdb;
 
 PDBSymbolThunk::PDBSymbolThunk(const IPDBSession &PDBSession,
                                std::unique_ptr<IPDBRawSymbol> Symbol)
-    : PDBSymbol(PDBSession, std::move(Symbol)) {}
+    : PDBSymbol(PDBSession, std::move(Symbol)) {
+  assert(RawSymbol->getSymTag() == PDB_SymType::Thunk);
+}
 
 void PDBSymbolThunk::dump(PDBSymDumper &Dumper) const { Dumper.dump(*this); }
diff --git a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeArray.cpp b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeArray.cpp
index c010cc5..a8054a4 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeArray.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeArray.cpp
@@ -19,12 +19,14 @@ using namespace llvm::pdb;
 
 PDBSymbolTypeArray::PDBSymbolTypeArray(const IPDBSession &PDBSession,
                                        std::unique_ptr<IPDBRawSymbol> Symbol)
-    : PDBSymbol(PDBSession, std::move(Symbol)) {}
-
-std::unique_ptr<PDBSymbol> PDBSymbolTypeArray::getElementType() const {
-  return Session.getSymbolById(getTypeId());
+    : PDBSymbol(PDBSession, std::move(Symbol)) {
+  assert(RawSymbol->getSymTag() == PDB_SymType::ArrayType);
 }
 
 void PDBSymbolTypeArray::dump(PDBSymDumper &Dumper) const {
   Dumper.dump(*this);
 }
+
+void PDBSymbolTypeArray::dumpRight(PDBSymDumper &Dumper) const {
+  Dumper.dumpRight(*this);
+}
diff --git a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeBaseClass.cpp b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeBaseClass.cpp
index 382c397..0fdf8b6 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeBaseClass.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeBaseClass.cpp
@@ -9,8 +9,8 @@
 
 #include "llvm/DebugInfo/PDB/PDBSymbolTypeBaseClass.h"
 
-#include "llvm/DebugInfo/PDB/PDBSymbol.h"
 #include "llvm/DebugInfo/PDB/PDBSymDumper.h"
+#include "llvm/DebugInfo/PDB/PDBSymbol.h"
 
 #include <utility>
 
@@ -19,7 +19,9 @@ using namespace llvm::pdb;
 
 PDBSymbolTypeBaseClass::PDBSymbolTypeBaseClass(
     const IPDBSession &PDBSession, std::unique_ptr<IPDBRawSymbol> Symbol)
-    : PDBSymbol(PDBSession, std::move(Symbol)) {}
+    : PDBSymbol(PDBSession, std::move(Symbol)) {
+  assert(RawSymbol->getSymTag() == PDB_SymType::BaseClass);
+}
 
 void PDBSymbolTypeBaseClass::dump(PDBSymDumper &Dumper) const {
   Dumper.dump(*this);
diff --git a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeBuiltin.cpp b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeBuiltin.cpp
index e5d65bf..0bf563a 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeBuiltin.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeBuiltin.cpp
@@ -18,7 +18,9 @@ using namespace llvm::pdb;
 
 PDBSymbolTypeBuiltin::PDBSymbolTypeBuiltin(
     const IPDBSession &PDBSession, std::unique_ptr<IPDBRawSymbol> Symbol)
-    : PDBSymbol(PDBSession, std::move(Symbol)) {}
+    : PDBSymbol(PDBSession, std::move(Symbol)) {
+  assert(RawSymbol->getSymTag() == PDB_SymType::BuiltinType);
+}
 
 void PDBSymbolTypeBuiltin::dump(PDBSymDumper &Dumper) const {
   Dumper.dump(*this);
diff --git a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeCustom.cpp b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeCustom.cpp
index 1d80c97..726e7e1 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeCustom.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeCustom.cpp
@@ -9,8 +9,8 @@
 
 #include "llvm/DebugInfo/PDB/PDBSymbolTypeCustom.h"
 
-#include "llvm/DebugInfo/PDB/PDBSymbol.h"
 #include "llvm/DebugInfo/PDB/PDBSymDumper.h"
+#include "llvm/DebugInfo/PDB/PDBSymbol.h"
 
 #include <utility>
 
@@ -19,7 +19,9 @@ using namespace llvm::pdb;
 
 PDBSymbolTypeCustom::PDBSymbolTypeCustom(const IPDBSession &PDBSession,
                                          std::unique_ptr<IPDBRawSymbol> Symbol)
-    : PDBSymbol(PDBSession, std::move(Symbol)) {}
+    : PDBSymbol(PDBSession, std::move(Symbol)) {
+  assert(RawSymbol->getSymTag() == PDB_SymType::CustomType);
+}
 
 void PDBSymbolTypeCustom::dump(PDBSymDumper &Dumper) const {
   Dumper.dump(*this);
diff --git a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeDimension.cpp b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeDimension.cpp
index 535d97d..6c84b98 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeDimension.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeDimension.cpp
@@ -10,8 +10,8 @@
 
 #include "llvm/DebugInfo/PDB/PDBSymbolTypeDimension.h"
 
-#include "llvm/DebugInfo/PDB/PDBSymbol.h"
 #include "llvm/DebugInfo/PDB/PDBSymDumper.h"
+#include "llvm/DebugInfo/PDB/PDBSymbol.h"
 
 #include <utility>
 
@@ -20,7 +20,9 @@ using namespace llvm::pdb;
 
 PDBSymbolTypeDimension::PDBSymbolTypeDimension(
     const IPDBSession &PDBSession, std::unique_ptr<IPDBRawSymbol> Symbol)
-    : PDBSymbol(PDBSession, std::move(Symbol)) {}
+    : PDBSymbol(PDBSession, std::move(Symbol)) {
+  assert(RawSymbol->getSymTag() == PDB_SymType::Dimension);
+}
 
 void PDBSymbolTypeDimension::dump(PDBSymDumper &Dumper) const {
   Dumper.dump(*this);
diff --git a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeEnum.cpp b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeEnum.cpp
index 788f2b7..2addea0 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeEnum.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeEnum.cpp
@@ -21,15 +21,8 @@ using namespace llvm::pdb;
 
 PDBSymbolTypeEnum::PDBSymbolTypeEnum(const IPDBSession &PDBSession,
                                      std::unique_ptr<IPDBRawSymbol> Symbol)
-    : PDBSymbol(PDBSession, std::move(Symbol)) {}
-
-std::unique_ptr<PDBSymbolTypeUDT> PDBSymbolTypeEnum::getClassParent() const {
-  return Session.getConcreteSymbolById<PDBSymbolTypeUDT>(getClassParentId());
-}
-
-std::unique_ptr<PDBSymbolTypeBuiltin>
-PDBSymbolTypeEnum::getUnderlyingType() const {
-  return Session.getConcreteSymbolById<PDBSymbolTypeBuiltin>(getTypeId());
+    : PDBSymbol(PDBSession, std::move(Symbol)) {
+  assert(RawSymbol->getSymTag() == PDB_SymType::Enum);
 }
 
 void PDBSymbolTypeEnum::dump(PDBSymDumper &Dumper) const { Dumper.dump(*this); }
diff --git a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeFriend.cpp b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeFriend.cpp
index 5831bae..c018772 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeFriend.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeFriend.cpp
@@ -9,8 +9,8 @@
 
 #include "llvm/DebugInfo/PDB/PDBSymbolTypeFriend.h"
 
-#include "llvm/DebugInfo/PDB/PDBSymbol.h"
 #include "llvm/DebugInfo/PDB/PDBSymDumper.h"
+#include "llvm/DebugInfo/PDB/PDBSymbol.h"
 
 #include <utility>
 
@@ -19,7 +19,9 @@ using namespace llvm::pdb;
 
 PDBSymbolTypeFriend::PDBSymbolTypeFriend(const IPDBSession &PDBSession,
                                          std::unique_ptr<IPDBRawSymbol> Symbol)
-    : PDBSymbol(PDBSession, std::move(Symbol)) {}
+    : PDBSymbol(PDBSession, std::move(Symbol)) {
+  assert(RawSymbol->getSymTag() == PDB_SymType::Friend);
+}
 
 void PDBSymbolTypeFriend::dump(PDBSymDumper &Dumper) const {
   Dumper.dump(*this);
diff --git a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeFunctionArg.cpp b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeFunctionArg.cpp
index c6f586d..4d5cd63 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeFunctionArg.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeFunctionArg.cpp
@@ -18,7 +18,9 @@ using namespace llvm::pdb;
 
 PDBSymbolTypeFunctionArg::PDBSymbolTypeFunctionArg(
     const IPDBSession &PDBSession, std::unique_ptr<IPDBRawSymbol> Symbol)
-    : PDBSymbol(PDBSession, std::move(Symbol)) {}
+    : PDBSymbol(PDBSession, std::move(Symbol)) {
+  assert(RawSymbol->getSymTag() == PDB_SymType::FunctionArg);
+}
 
 void PDBSymbolTypeFunctionArg::dump(PDBSymDumper &Dumper) const {
   Dumper.dump(*this);
diff --git a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeFunctionSig.cpp b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeFunctionSig.cpp
index 057ae26..0304c62 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeFunctionSig.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeFunctionSig.cpp
@@ -12,9 +12,9 @@
 #include "llvm/DebugInfo/PDB/ConcreteSymbolEnumerator.h"
 #include "llvm/DebugInfo/PDB/IPDBEnumChildren.h"
 #include "llvm/DebugInfo/PDB/IPDBSession.h"
+#include "llvm/DebugInfo/PDB/PDBSymDumper.h"
 #include "llvm/DebugInfo/PDB/PDBSymbol.h"
 #include "llvm/DebugInfo/PDB/PDBSymbolTypeFunctionArg.h"
-#include "llvm/DebugInfo/PDB/PDBSymDumper.h"
 
 #include <utility>
 
@@ -68,10 +68,8 @@ private:
 
 PDBSymbolTypeFunctionSig::PDBSymbolTypeFunctionSig(
     const IPDBSession &PDBSession, std::unique_ptr<IPDBRawSymbol> Symbol)
-    : PDBSymbol(PDBSession, std::move(Symbol)) {}
-
-std::unique_ptr<PDBSymbol> PDBSymbolTypeFunctionSig::getReturnType() const {
-  return Session.getSymbolById(getTypeId());
+    : PDBSymbol(PDBSession, std::move(Symbol)) {
+  assert(RawSymbol->getSymTag() == PDB_SymType::FunctionSig);
 }
 
 std::unique_ptr<IPDBEnumSymbols>
@@ -79,13 +77,10 @@ PDBSymbolTypeFunctionSig::getArguments() const {
   return llvm::make_unique<FunctionArgEnumerator>(Session, *this);
 }
 
-std::unique_ptr<PDBSymbol> PDBSymbolTypeFunctionSig::getClassParent() const {
-  uint32_t ClassId = getClassParentId();
-  if (ClassId == 0)
-    return nullptr;
-  return Session.getSymbolById(ClassId);
-}
-
 void PDBSymbolTypeFunctionSig::dump(PDBSymDumper &Dumper) const {
   Dumper.dump(*this);
 }
+
+void PDBSymbolTypeFunctionSig::dumpRight(PDBSymDumper &Dumper) const {
+  Dumper.dumpRight(*this);
+}
diff --git a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeManaged.cpp b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeManaged.cpp
index 072d2cf..7cfba82 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeManaged.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeManaged.cpp
@@ -9,8 +9,8 @@
 
 #include "llvm/DebugInfo/PDB/PDBSymbolTypeManaged.h"
 
-#include "llvm/DebugInfo/PDB/PDBSymbol.h"
 #include "llvm/DebugInfo/PDB/PDBSymDumper.h"
+#include "llvm/DebugInfo/PDB/PDBSymbol.h"
 
 #include <utility>
 
@@ -19,7 +19,9 @@ using namespace llvm::pdb;
 
 PDBSymbolTypeManaged::PDBSymbolTypeManaged(
     const IPDBSession &PDBSession, std::unique_ptr<IPDBRawSymbol> Symbol)
-    : PDBSymbol(PDBSession, std::move(Symbol)) {}
+    : PDBSymbol(PDBSession, std::move(Symbol)) {
+  assert(RawSymbol->getSymTag() == PDB_SymType::ManagedType);
+}
 
 void PDBSymbolTypeManaged::dump(PDBSymDumper &Dumper) const {
   Dumper.dump(*this);
diff --git a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypePointer.cpp b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypePointer.cpp
index 6997714..6981981 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypePointer.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypePointer.cpp
@@ -19,12 +19,14 @@ using namespace llvm::pdb;
 
 PDBSymbolTypePointer::PDBSymbolTypePointer(
     const IPDBSession &PDBSession, std::unique_ptr<IPDBRawSymbol> Symbol)
-    : PDBSymbol(PDBSession, std::move(Symbol)) {}
-
-std::unique_ptr<PDBSymbol> PDBSymbolTypePointer::getPointeeType() const {
-  return Session.getSymbolById(getTypeId());
+    : PDBSymbol(PDBSession, std::move(Symbol)) {
+  assert(RawSymbol->getSymTag() == PDB_SymType::PointerType);
 }
 
 void PDBSymbolTypePointer::dump(PDBSymDumper &Dumper) const {
   Dumper.dump(*this);
 }
+
+void PDBSymbolTypePointer::dumpRight(PDBSymDumper &Dumper) const {
+  Dumper.dumpRight(*this);
+}
diff --git a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeTypedef.cpp b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeTypedef.cpp
index 0f283b9..102b540 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeTypedef.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeTypedef.cpp
@@ -18,7 +18,9 @@ using namespace llvm::pdb;
 
 PDBSymbolTypeTypedef::PDBSymbolTypeTypedef(
     const IPDBSession &PDBSession, std::unique_ptr<IPDBRawSymbol> Symbol)
-    : PDBSymbol(PDBSession, std::move(Symbol)) {}
+    : PDBSymbol(PDBSession, std::move(Symbol)) {
+  assert(RawSymbol->getSymTag() == PDB_SymType::Typedef);
+}
 
 void PDBSymbolTypeTypedef::dump(PDBSymDumper &Dumper) const {
   Dumper.dump(*this);
diff --git a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeUDT.cpp b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeUDT.cpp
index c71838c..15dc153 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeUDT.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeUDT.cpp
@@ -9,7 +9,15 @@
 
 #include "llvm/DebugInfo/PDB/PDBSymbolTypeUDT.h"
 
+#include "llvm/DebugInfo/PDB/IPDBSession.h"
 #include "llvm/DebugInfo/PDB/PDBSymDumper.h"
+#include "llvm/DebugInfo/PDB/PDBSymbol.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolData.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolExe.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypeBaseClass.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypeVTable.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypeVTableShape.h"
+#include "llvm/DebugInfo/PDB/UDTLayout.h"
 
 #include <utility>
 
@@ -18,6 +26,8 @@ using namespace llvm::pdb;
 
 PDBSymbolTypeUDT::PDBSymbolTypeUDT(const IPDBSession &PDBSession,
                                    std::unique_ptr<IPDBRawSymbol> Symbol)
-    : PDBSymbol(PDBSession, std::move(Symbol)) {}
+    : PDBSymbol(PDBSession, std::move(Symbol)) {
+  assert(RawSymbol->getSymTag() == PDB_SymType::UDT);
+}
 
 void PDBSymbolTypeUDT::dump(PDBSymDumper &Dumper) const { Dumper.dump(*this); }
diff --git a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeVTable.cpp b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeVTable.cpp
index 6b76db5..9a21855 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeVTable.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeVTable.cpp
@@ -18,7 +18,9 @@ using namespace llvm::pdb;
 
 PDBSymbolTypeVTable::PDBSymbolTypeVTable(const IPDBSession &PDBSession,
                                          std::unique_ptr<IPDBRawSymbol> Symbol)
-    : PDBSymbol(PDBSession, std::move(Symbol)) {}
+    : PDBSymbol(PDBSession, std::move(Symbol)) {
+  assert(RawSymbol->getSymTag() == PDB_SymType::VTable);
+}
 
 void PDBSymbolTypeVTable::dump(PDBSymDumper &Dumper) const {
   Dumper.dump(*this);
diff --git a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeVTableShape.cpp b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeVTableShape.cpp
index ef509d6..ddc0574 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeVTableShape.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolTypeVTableShape.cpp
@@ -9,8 +9,8 @@
 
 #include "llvm/DebugInfo/PDB/PDBSymbolTypeVTableShape.h"
 
-#include "llvm/DebugInfo/PDB/PDBSymbol.h"
 #include "llvm/DebugInfo/PDB/PDBSymDumper.h"
+#include "llvm/DebugInfo/PDB/PDBSymbol.h"
 
 #include <utility>
 
@@ -19,7 +19,9 @@ using namespace llvm::pdb;
 
 PDBSymbolTypeVTableShape::PDBSymbolTypeVTableShape(
     const IPDBSession &PDBSession, std::unique_ptr<IPDBRawSymbol> Symbol)
-    : PDBSymbol(PDBSession, std::move(Symbol)) {}
+    : PDBSymbol(PDBSession, std::move(Symbol)) {
+  assert(RawSymbol->getSymTag() == PDB_SymType::VTableShape);
+}
 
 void PDBSymbolTypeVTableShape::dump(PDBSymDumper &Dumper) const {
   Dumper.dump(*this);
diff --git a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolUnknown.cpp b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolUnknown.cpp
index dbbea9c..fdbe845 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolUnknown.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolUnknown.cpp
@@ -9,8 +9,8 @@
 
 #include "llvm/DebugInfo/PDB/PDBSymbolUnknown.h"
 
-#include "llvm/DebugInfo/PDB/PDBSymbol.h"
 #include "llvm/DebugInfo/PDB/PDBSymDumper.h"
+#include "llvm/DebugInfo/PDB/PDBSymbol.h"
 
 #include <utility>
 
diff --git a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolUsingNamespace.cpp b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolUsingNamespace.cpp
index 6a62d55..f40578f 100644
--- a/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolUsingNamespace.cpp
+++ b/contrib/llvm/lib/DebugInfo/PDB/PDBSymbolUsingNamespace.cpp
@@ -9,8 +9,8 @@
 
 #include "llvm/DebugInfo/PDB/PDBSymbolUsingNamespace.h"
 
-#include "llvm/DebugInfo/PDB/PDBSymbol.h"
 #include "llvm/DebugInfo/PDB/PDBSymDumper.h"
+#include "llvm/DebugInfo/PDB/PDBSymbol.h"
 
 #include <utility>
 
@@ -19,7 +19,9 @@ using namespace llvm::pdb;
 
 PDBSymbolUsingNamespace::PDBSymbolUsingNamespace(
     const IPDBSession &PDBSession, std::unique_ptr<IPDBRawSymbol> Symbol)
-    : PDBSymbol(PDBSession, std::move(Symbol)) {}
+    : PDBSymbol(PDBSession, std::move(Symbol)) {
+  assert(RawSymbol->getSymTag() == PDB_SymType::UsingNamespace);
+}
 
 void PDBSymbolUsingNamespace::dump(PDBSymDumper &Dumper) const {
   Dumper.dump(*this);
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Raw/InfoStream.cpp b/contrib/llvm/lib/DebugInfo/PDB/Raw/InfoStream.cpp
deleted file mode 100644
index f19535d..0000000
--- a/contrib/llvm/lib/DebugInfo/PDB/Raw/InfoStream.cpp
+++ /dev/null
@@ -1,77 +0,0 @@
-//===- InfoStream.cpp - PDB Info Stream (Stream 1) Access -------*- C++ -*-===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/DebugInfo/PDB/Raw/InfoStream.h"
-#include "llvm/ADT/BitVector.h"
-#include "llvm/ADT/SmallVector.h"
-#include "llvm/DebugInfo/MSF/StreamReader.h"
-#include "llvm/DebugInfo/MSF/StreamWriter.h"
-#include "llvm/DebugInfo/PDB/Raw/PDBFile.h"
-#include "llvm/DebugInfo/PDB/Raw/RawConstants.h"
-#include "llvm/DebugInfo/PDB/Raw/RawError.h"
-#include "llvm/DebugInfo/PDB/Raw/RawTypes.h"
-
-using namespace llvm;
-using namespace llvm::codeview;
-using namespace llvm::msf;
-using namespace llvm::pdb;
-
-InfoStream::InfoStream(std::unique_ptr<MappedBlockStream> Stream)
-    : Stream(std::move(Stream)) {}
-
-Error InfoStream::reload() {
-  StreamReader Reader(*Stream);
-
-  const InfoStreamHeader *H;
-  if (auto EC = Reader.readObject(H))
-    return joinErrors(
-        std::move(EC),
-        make_error<RawError>(raw_error_code::corrupt_file,
-                             "PDB Stream does not contain a header."));
-
-  switch (H->Version) {
-  case PdbImplVC70:
-  case PdbImplVC80:
-  case PdbImplVC110:
-  case PdbImplVC140:
-    break;
-  default:
-    return make_error<RawError>(raw_error_code::corrupt_file,
-                                "Unsupported PDB stream version.");
-  }
-
-  Version = H->Version;
-  Signature = H->Signature;
-  Age = H->Age;
-  Guid = H->Guid;
-
-  return NamedStreams.load(Reader);
-}
-
-uint32_t InfoStream::getNamedStreamIndex(llvm::StringRef Name) const {
-  uint32_t Result;
-  if (!NamedStreams.tryGetValue(Name, Result))
-    return 0;
-  return Result;
-}
-
-iterator_range<StringMapConstIterator<uint32_t>>
-InfoStream::named_streams() const {
-  return NamedStreams.entries();
-}
-
-PdbRaw_ImplVer InfoStream::getVersion() const {
-  return static_cast<PdbRaw_ImplVer>(Version);
-}
-
-uint32_t InfoStream::getSignature() const { return Signature; }
-
-uint32_t InfoStream::getAge() const { return Age; }
-
-PDB_UniqueId InfoStream::getGuid() const { return Guid; }
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Raw/InfoStreamBuilder.cpp b/contrib/llvm/lib/DebugInfo/PDB/Raw/InfoStreamBuilder.cpp
deleted file mode 100644
index 73fbf85..0000000
--- a/contrib/llvm/lib/DebugInfo/PDB/Raw/InfoStreamBuilder.cpp
+++ /dev/null
@@ -1,65 +0,0 @@
-//===- InfoStreamBuilder.cpp - PDB Info Stream Creation ---------*- C++ -*-===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/DebugInfo/PDB/Raw/InfoStreamBuilder.h"
-
-#include "llvm/DebugInfo/MSF/MSFBuilder.h"
-#include "llvm/DebugInfo/MSF/MappedBlockStream.h"
-#include "llvm/DebugInfo/MSF/StreamWriter.h"
-#include "llvm/DebugInfo/PDB/Raw/InfoStream.h"
-#include "llvm/DebugInfo/PDB/Raw/RawError.h"
-#include "llvm/DebugInfo/PDB/Raw/RawTypes.h"
-
-using namespace llvm;
-using namespace llvm::codeview;
-using namespace llvm::msf;
-using namespace llvm::pdb;
-
-InfoStreamBuilder::InfoStreamBuilder(msf::MSFBuilder &Msf)
-    : Msf(Msf), Ver(PdbRaw_ImplVer::PdbImplVC70), Sig(-1), Age(0) {}
-
-void InfoStreamBuilder::setVersion(PdbRaw_ImplVer V) { Ver = V; }
-
-void InfoStreamBuilder::setSignature(uint32_t S) { Sig = S; }
-
-void InfoStreamBuilder::setAge(uint32_t A) { Age = A; }
-
-void InfoStreamBuilder::setGuid(PDB_UniqueId G) { Guid = G; }
-
-NameMapBuilder &InfoStreamBuilder::getNamedStreamsBuilder() {
-  return NamedStreams;
-}
-
-uint32_t InfoStreamBuilder::calculateSerializedLength() const {
-  return sizeof(InfoStreamHeader) + NamedStreams.calculateSerializedLength();
-}
-
-Error InfoStreamBuilder::finalizeMsfLayout() {
-  uint32_t Length = calculateSerializedLength();
-  if (auto EC = Msf.setStreamSize(StreamPDB, Length))
-    return EC;
-  return Error::success();
-}
-
-Error InfoStreamBuilder::commit(const msf::MSFLayout &Layout,
-                                const msf::WritableStream &Buffer) const {
-  auto InfoS =
-      WritableMappedBlockStream::createIndexedStream(Layout, Buffer, StreamPDB);
-  StreamWriter Writer(*InfoS);
-
-  InfoStreamHeader H;
-  H.Age = Age;
-  H.Signature = Sig;
-  H.Version = Ver;
-  H.Guid = Guid;
-  if (auto EC = Writer.writeObject(H))
-    return EC;
-
-  return NamedStreams.commit(Writer);
-}
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Raw/ModInfo.cpp b/contrib/llvm/lib/DebugInfo/PDB/Raw/ModInfo.cpp
deleted file mode 100644
index b34d770..0000000
--- a/contrib/llvm/lib/DebugInfo/PDB/Raw/ModInfo.cpp
+++ /dev/null
@@ -1,81 +0,0 @@
-//===- ModInfo.cpp - PDB module information -------------------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/DebugInfo/MSF/StreamReader.h"
-#include "llvm/DebugInfo/PDB/Raw/ModInfo.h"
-#include "llvm/DebugInfo/PDB/Raw/RawTypes.h"
-#include "llvm/Support/Endian.h"
-#include "llvm/Support/Error.h"
-#include "llvm/Support/MathExtras.h"
-#include <cstdint>
-
-using namespace llvm;
-using namespace llvm::msf;
-using namespace llvm::pdb;
-using namespace llvm::support;
-
-ModInfo::ModInfo() = default;
-
-ModInfo::ModInfo(const ModInfo &Info) = default;
-
-ModInfo::~ModInfo() = default;
-
-Error ModInfo::initialize(ReadableStreamRef Stream, ModInfo &Info) {
-  StreamReader Reader(Stream);
-  if (auto EC = Reader.readObject(Info.Layout))
-    return EC;
-
-  if (auto EC = Reader.readZeroString(Info.ModuleName))
-    return EC;
-
-  if (auto EC = Reader.readZeroString(Info.ObjFileName))
-    return EC;
-  return Error::success();
-}
-
-bool ModInfo::hasECInfo() const {
-  return (Layout->Flags & ModInfoFlags::HasECFlagMask) != 0;
-}
-
-uint16_t ModInfo::getTypeServerIndex() const {
-  return (Layout->Flags & ModInfoFlags::TypeServerIndexMask) >>
-         ModInfoFlags::TypeServerIndexShift;
-}
-
-uint16_t ModInfo::getModuleStreamIndex() const { return Layout->ModDiStream; }
-
-uint32_t ModInfo::getSymbolDebugInfoByteSize() const {
-  return Layout->SymBytes;
-}
-
-uint32_t ModInfo::getLineInfoByteSize() const { return Layout->LineBytes; }
-
-uint32_t ModInfo::getC13LineInfoByteSize() const { return Layout->C13Bytes; }
-
-uint32_t ModInfo::getNumberOfFiles() const { return Layout->NumFiles; }
-
-uint32_t ModInfo::getSourceFileNameIndex() const {
-  return Layout->SrcFileNameNI;
-}
-
-uint32_t ModInfo::getPdbFilePathNameIndex() const {
-  return Layout->PdbFilePathNI;
-}
-
-StringRef ModInfo::getModuleName() const { return ModuleName; }
-
-StringRef ModInfo::getObjFileName() const { return ObjFileName; }
-
-uint32_t ModInfo::getRecordLength() const {
-  uint32_t M = ModuleName.str().size() + 1;
-  uint32_t O = ObjFileName.str().size() + 1;
-  uint32_t Size = sizeof(ModuleInfoHeader) + M + O;
-  Size = alignTo(Size, 4);
-  return Size;
-}
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Raw/ModStream.cpp b/contrib/llvm/lib/DebugInfo/PDB/Raw/ModStream.cpp
deleted file mode 100644
index 0ffc5b7..0000000
--- a/contrib/llvm/lib/DebugInfo/PDB/Raw/ModStream.cpp
+++ /dev/null
@@ -1,85 +0,0 @@
-//===- ModStream.cpp - PDB Module Info Stream Access ----------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/ADT/iterator_range.h"
-#include "llvm/DebugInfo/CodeView/SymbolRecord.h"
-#include "llvm/DebugInfo/MSF/StreamReader.h"
-#include "llvm/DebugInfo/MSF/StreamRef.h"
-#include "llvm/DebugInfo/PDB/Raw/ModInfo.h"
-#include "llvm/DebugInfo/PDB/Raw/ModStream.h"
-#include "llvm/DebugInfo/PDB/Raw/PDBFile.h"
-#include "llvm/DebugInfo/PDB/Raw/RawError.h"
-#include "llvm/DebugInfo/PDB/Raw/RawTypes.h"
-#include "llvm/Support/Error.h"
-#include <algorithm>
-#include <cstdint>
-
-using namespace llvm;
-using namespace llvm::msf;
-using namespace llvm::pdb;
-
-ModStream::ModStream(const ModInfo &Module,
-                     std::unique_ptr<MappedBlockStream> Stream)
-    : Mod(Module), Stream(std::move(Stream)) {}
-
-ModStream::~ModStream() = default;
-
-Error ModStream::reload() {
-  StreamReader Reader(*Stream);
-
-  uint32_t SymbolSize = Mod.getSymbolDebugInfoByteSize();
-  uint32_t C11Size = Mod.getLineInfoByteSize();
-  uint32_t C13Size = Mod.getC13LineInfoByteSize();
-
-  if (C11Size > 0 && C13Size > 0)
-    return make_error<RawError>(raw_error_code::corrupt_file,
-                                "Module has both C11 and C13 line info");
-
-  ReadableStreamRef S;
-
-  if (auto EC = Reader.readInteger(Signature))
-    return EC;
-  if (auto EC = Reader.readArray(SymbolsSubstream, SymbolSize - 4))
-    return EC;
-
-  if (auto EC = Reader.readStreamRef(LinesSubstream, C11Size))
-    return EC;
-  if (auto EC = Reader.readStreamRef(C13LinesSubstream, C13Size))
-    return EC;
-
-  StreamReader LineReader(C13LinesSubstream);
-  if (auto EC = LineReader.readArray(LineInfo, LineReader.bytesRemaining()))
-    return EC;
-
-  uint32_t GlobalRefsSize;
-  if (auto EC = Reader.readInteger(GlobalRefsSize))
-    return EC;
-  if (auto EC = Reader.readStreamRef(GlobalRefsSubstream, GlobalRefsSize))
-    return EC;
-  if (Reader.bytesRemaining() > 0)
-    return make_error<RawError>(raw_error_code::corrupt_file,
-                                "Unexpected bytes in module stream.");
-
-  return Error::success();
-}
-
-iterator_range<codeview::CVSymbolArray::Iterator>
-ModStream::symbols(bool *HadError) const {
-  // It's OK if the stream is empty.
-  if (SymbolsSubstream.getUnderlyingStream().getLength() == 0)
-    return make_range(SymbolsSubstream.end(), SymbolsSubstream.end());
-  return make_range(SymbolsSubstream.begin(HadError), SymbolsSubstream.end());
-}
-
-iterator_range<codeview::ModuleSubstreamArray::Iterator>
-ModStream::lines(bool *HadError) const {
-  return make_range(LineInfo.begin(HadError), LineInfo.end());
-}
-
-Error ModStream::commit() { return Error::success(); }
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Raw/NameHashTable.cpp b/contrib/llvm/lib/DebugInfo/PDB/Raw/NameHashTable.cpp
deleted file mode 100644
index 84cccb35..0000000
--- a/contrib/llvm/lib/DebugInfo/PDB/Raw/NameHashTable.cpp
+++ /dev/null
@@ -1,104 +0,0 @@
-//===- NameHashTable.cpp - PDB Name Hash Table ------------------*- C++ -*-===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/DebugInfo/PDB/Raw/NameHashTable.h"
-
-#include "llvm/ADT/ArrayRef.h"
-#include "llvm/DebugInfo/MSF/StreamReader.h"
-#include "llvm/DebugInfo/PDB/Raw/Hash.h"
-#include "llvm/DebugInfo/PDB/Raw/RawError.h"
-#include "llvm/Support/Endian.h"
-
-using namespace llvm;
-using namespace llvm::msf;
-using namespace llvm::support;
-using namespace llvm::pdb;
-
-NameHashTable::NameHashTable() : Signature(0), HashVersion(0), NameCount(0) {}
-
-Error NameHashTable::load(StreamReader &Stream) {
-  struct Header {
-    support::ulittle32_t Signature;
-    support::ulittle32_t HashVersion;
-    support::ulittle32_t ByteSize;
-  };
-
-  const Header *H;
-  if (auto EC = Stream.readObject(H))
-    return EC;
-
-  if (H->Signature != 0xEFFEEFFE)
-    return make_error<RawError>(raw_error_code::corrupt_file,
-                                "Invalid hash table signature");
-  if (H->HashVersion != 1 && H->HashVersion != 2)
-    return make_error<RawError>(raw_error_code::corrupt_file,
-                                "Unsupported hash version");
-
-  Signature = H->Signature;
-  HashVersion = H->HashVersion;
-  if (auto EC = Stream.readStreamRef(NamesBuffer, H->ByteSize))
-    return joinErrors(std::move(EC),
-                      make_error<RawError>(raw_error_code::corrupt_file,
-                                           "Invalid hash table byte length"));
-
-  const support::ulittle32_t *HashCount;
-  if (auto EC = Stream.readObject(HashCount))
-    return EC;
-
-  if (auto EC = Stream.readArray(IDs, *HashCount))
-    return joinErrors(std::move(EC),
-                      make_error<RawError>(raw_error_code::corrupt_file,
-                                           "Could not read bucket array"));
-
-  if (Stream.bytesRemaining() < sizeof(support::ulittle32_t))
-    return make_error<RawError>(raw_error_code::corrupt_file,
-                                "Missing name count");
-
-  if (auto EC = Stream.readInteger(NameCount))
-    return EC;
-  return Error::success();
-}
-
-StringRef NameHashTable::getStringForID(uint32_t ID) const {
-  if (ID == IDs[0])
-    return StringRef();
-
-  // NamesBuffer is a buffer of null terminated strings back to back.  ID is
-  // the starting offset of the string we're looking for.  So just seek into
-  // the desired offset and a read a null terminated stream from that offset.
-  StringRef Result;
-  StreamReader NameReader(NamesBuffer);
-  NameReader.setOffset(ID);
-  if (auto EC = NameReader.readZeroString(Result))
-    consumeError(std::move(EC));
-  return Result;
-}
-
-uint32_t NameHashTable::getIDForString(StringRef Str) const {
-  uint32_t Hash = (HashVersion == 1) ? hashStringV1(Str) : hashStringV2(Str);
-  size_t Count = IDs.size();
-  uint32_t Start = Hash % Count;
-  for (size_t I = 0; I < Count; ++I) {
-    // The hash is just a starting point for the search, but if it
-    // doesn't work we should find the string no matter what, because
-    // we iterate the entire array.
-    uint32_t Index = (Start + I) % Count;
-
-    uint32_t ID = IDs[Index];
-    StringRef S = getStringForID(ID);
-    if (S == Str)
-      return ID;
-  }
-  // IDs[0] contains the ID of the "invalid" entry.
-  return IDs[0];
-}
-
-FixedStreamArray<support::ulittle32_t> NameHashTable::name_ids() const {
-  return IDs;
-}
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Raw/NameMap.cpp b/contrib/llvm/lib/DebugInfo/PDB/Raw/NameMap.cpp
deleted file mode 100644
index 0f55f58..0000000
--- a/contrib/llvm/lib/DebugInfo/PDB/Raw/NameMap.cpp
+++ /dev/null
@@ -1,163 +0,0 @@
-//===- NameMap.cpp - PDB Name Map -------------------------------*- C++ -*-===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/ADT/SparseBitVector.h"
-#include "llvm/ADT/StringMap.h"
-#include "llvm/ADT/StringRef.h"
-#include "llvm/ADT/iterator_range.h"
-#include "llvm/DebugInfo/MSF/StreamReader.h"
-#include "llvm/DebugInfo/PDB/Raw/NameMap.h"
-#include "llvm/DebugInfo/PDB/Raw/RawError.h"
-#include "llvm/Support/Error.h"
-#include <algorithm>
-#include <cstdint>
-
-using namespace llvm;
-using namespace llvm::msf;
-using namespace llvm::pdb;
-
-NameMap::NameMap() = default;
-
-Error NameMap::load(StreamReader &Stream) {
-  // This is some sort of weird string-set/hash table encoded in the stream.
-  // It starts with the number of bytes in the table.
-  uint32_t NumberOfBytes;
-  if (auto EC = Stream.readInteger(NumberOfBytes))
-    return joinErrors(std::move(EC),
-                      make_error<RawError>(raw_error_code::corrupt_file,
-                                           "Expected name map length"));
-  if (Stream.bytesRemaining() < NumberOfBytes)
-    return make_error<RawError>(raw_error_code::corrupt_file,
-                                "Invalid name map length");
-
-  // Following that field is the starting offset of strings in the name table.
-  uint32_t StringsOffset = Stream.getOffset();
-  Stream.setOffset(StringsOffset + NumberOfBytes);
-
-  // This appears to be equivalent to the total number of strings *actually*
-  // in the name table.
-  uint32_t HashSize;
-  if (auto EC = Stream.readInteger(HashSize))
-    return joinErrors(std::move(EC),
-                      make_error<RawError>(raw_error_code::corrupt_file,
-                                           "Expected name map hash size"));
-
-  // This appears to be an upper bound on the number of strings in the name
-  // table.
-  uint32_t MaxNumberOfStrings;
-  if (auto EC = Stream.readInteger(MaxNumberOfStrings))
-    return joinErrors(std::move(EC),
-                      make_error<RawError>(raw_error_code::corrupt_file,
-                                           "Expected name map max strings"));
-
-  if (MaxNumberOfStrings > (UINT32_MAX / sizeof(uint32_t)))
-    return make_error<RawError>(raw_error_code::corrupt_file,
-                                "Implausible number of strings");
-
-  const uint32_t MaxNumberOfWords = UINT32_MAX / (sizeof(uint32_t) * 8);
-
-  // This appears to be a hash table which uses bitfields to determine whether
-  // or not a bucket is 'present'.
-  uint32_t NumPresentWords;
-  if (auto EC = Stream.readInteger(NumPresentWords))
-    return joinErrors(std::move(EC),
-                      make_error<RawError>(raw_error_code::corrupt_file,
-                                           "Expected name map num words"));
-
-  if (NumPresentWords > MaxNumberOfWords)
-    return make_error<RawError>(raw_error_code::corrupt_file,
-                                "Number of present words is too large");
-
-  SparseBitVector<> Present;
-  for (uint32_t I = 0; I != NumPresentWords; ++I) {
-    uint32_t Word;
-    if (auto EC = Stream.readInteger(Word))
-      return joinErrors(std::move(EC),
-                        make_error<RawError>(raw_error_code::corrupt_file,
-                                             "Expected name map word"));
-    for (unsigned Idx = 0; Idx < 32; ++Idx)
-      if (Word & (1U << Idx))
-        Present.set((I * 32) + Idx);
-  }
-
-  // This appears to be a hash table which uses bitfields to determine whether
-  // or not a bucket is 'deleted'.
-  uint32_t NumDeletedWords;
-  if (auto EC = Stream.readInteger(NumDeletedWords))
-    return joinErrors(
-        std::move(EC),
-        make_error<RawError>(raw_error_code::corrupt_file,
-                             "Expected name map num deleted words"));
-
-  if (NumDeletedWords > MaxNumberOfWords)
-    return make_error<RawError>(raw_error_code::corrupt_file,
-                                "Number of deleted words is too large");
-
-  SparseBitVector<> Deleted;
-  for (uint32_t I = 0; I != NumDeletedWords; ++I) {
-    uint32_t Word;
-    if (auto EC = Stream.readInteger(Word))
-      return joinErrors(std::move(EC),
-                        make_error<RawError>(raw_error_code::corrupt_file,
-                                             "Expected name map word"));
-    for (unsigned Idx = 0; Idx < 32; ++Idx)
-      if (Word & (1U << Idx))
-        Deleted.set((I * 32) + Idx);
-  }
-
-  for (unsigned I : Present) {
-    // For all present entries, dump out their mapping.
-    (void)I;
-
-    // This appears to be an offset relative to the start of the strings.
-    // It tells us where the null-terminated string begins.
-    uint32_t NameOffset;
-    if (auto EC = Stream.readInteger(NameOffset))
-      return joinErrors(std::move(EC),
-                        make_error<RawError>(raw_error_code::corrupt_file,
-                                             "Expected name map name offset"));
-
-    // This appears to be a stream number into the stream directory.
-    uint32_t NameIndex;
-    if (auto EC = Stream.readInteger(NameIndex))
-      return joinErrors(std::move(EC),
-                        make_error<RawError>(raw_error_code::corrupt_file,
-                                             "Expected name map name index"));
-
-    // Compute the offset of the start of the string relative to the stream.
-    uint32_t StringOffset = StringsOffset + NameOffset;
-    uint32_t OldOffset = Stream.getOffset();
-    // Pump out our c-string from the stream.
-    StringRef Str;
-    Stream.setOffset(StringOffset);
-    if (auto EC = Stream.readZeroString(Str))
-      return joinErrors(std::move(EC),
-                        make_error<RawError>(raw_error_code::corrupt_file,
-                                             "Expected name map name"));
-
-    Stream.setOffset(OldOffset);
-    // Add this to a string-map from name to stream number.
-    Mapping.insert({Str, NameIndex});
-  }
-
-  return Error::success();
-}
-
-iterator_range<StringMapConstIterator<uint32_t>> NameMap::entries() const {
-  return make_range<StringMapConstIterator<uint32_t>>(Mapping.begin(),
-                                                      Mapping.end());
-}
-
-bool NameMap::tryGetValue(StringRef Name, uint32_t &Value) const {
-  auto Iter = Mapping.find(Name);
-  if (Iter == Mapping.end())
-    return false;
-  Value = Iter->second;
-  return true;
-}
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Raw/NameMapBuilder.cpp b/contrib/llvm/lib/DebugInfo/PDB/Raw/NameMapBuilder.cpp
deleted file mode 100644
index f570d59..0000000
--- a/contrib/llvm/lib/DebugInfo/PDB/Raw/NameMapBuilder.cpp
+++ /dev/null
@@ -1,108 +0,0 @@
-//===- NameMapBuilder.cpp - PDB Name Map Builder ----------------*- C++ -*-===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/ADT/STLExtras.h"
-#include "llvm/DebugInfo/MSF/StreamWriter.h"
-#include "llvm/DebugInfo/PDB/Raw/NameMap.h"
-#include "llvm/DebugInfo/PDB/Raw/NameMapBuilder.h"
-#include "llvm/Support/Endian.h"
-#include "llvm/Support/Error.h"
-#include <algorithm>
-#include <cstdint>
-
-using namespace llvm;
-using namespace llvm::pdb;
-
-NameMapBuilder::NameMapBuilder() = default;
-
-void NameMapBuilder::addMapping(StringRef Name, uint32_t Mapping) {
-  StringDataBytes += Name.size() + 1;
-  Map.insert({Name, Mapping});
-}
-
-Expected<std::unique_ptr<NameMap>> NameMapBuilder::build() {
-  auto Result = llvm::make_unique<NameMap>();
-  Result->Mapping = Map;
-  return std::move(Result);
-}
-
-uint32_t NameMapBuilder::calculateSerializedLength() const {
-  uint32_t TotalLength = 0;
-
-  TotalLength += sizeof(support::ulittle32_t); // StringDataBytes value
-  TotalLength += StringDataBytes;              // actual string data
-
-  TotalLength += sizeof(support::ulittle32_t); // Hash Size
-  TotalLength += sizeof(support::ulittle32_t); // Max Number of Strings
-  TotalLength += sizeof(support::ulittle32_t); // Num Present Words
-  // One bitmask word for each present entry
-  TotalLength += Map.size() * sizeof(support::ulittle32_t);
-  TotalLength += sizeof(support::ulittle32_t); // Num Deleted Words
-
-  // For each present word, which we are treating as equivalent to the number of
-  // entries in the table, we have a pair of integers.  An offset into the
-  // string data, and a corresponding stream number.
-  TotalLength += Map.size() * 2 * sizeof(support::ulittle32_t);
-
-  return TotalLength;
-}
-
-Error NameMapBuilder::commit(msf::StreamWriter &Writer) const {
-  // The first field is the number of bytes of string data.  So add
-  // up the length of all strings plus a null terminator for each
-  // one.
-  uint32_t NumBytes = 0;
-  for (auto B = Map.begin(), E = Map.end(); B != E; ++B) {
-    NumBytes += B->getKeyLength() + 1;
-  }
-
-  if (auto EC = Writer.writeInteger(NumBytes)) // Number of bytes of string data
-    return EC;
-  // Now all of the string data itself.
-  for (auto B = Map.begin(), E = Map.end(); B != E; ++B) {
-    if (auto EC = Writer.writeZeroString(B->getKey()))
-      return EC;
-  }
-
-  if (auto EC = Writer.writeInteger(Map.size())) // Hash Size
-    return EC;
-
-  if (auto EC = Writer.writeInteger(Map.size())) // Max Number of Strings
-    return EC;
-
-  if (auto EC = Writer.writeInteger(Map.size())) // Num Present Words
-    return EC;
-
-  // For each entry in the mapping, write a bit mask which represents a bucket
-  // to store it in.  We don't use this, so the value we write isn't important
-  // to us, it just has to be there.
-  for (auto B = Map.begin(), E = Map.end(); B != E; ++B) {
-    if (auto EC = Writer.writeInteger(1U))
-      return EC;
-  }
-
-  if (auto EC = Writer.writeInteger(0U)) // Num Deleted Words
-    return EC;
-
-  // Mappings of each word.
-  uint32_t OffsetSoFar = 0;
-  for (auto B = Map.begin(), E = Map.end(); B != E; ++B) {
-    // This is a list of key value pairs where the key is the offset into the
-    // strings buffer, and the value is a stream number.  Write each pair.
-    if (auto EC = Writer.writeInteger(OffsetSoFar))
-      return EC;
-
-    if (auto EC = Writer.writeInteger(B->second))
-      return EC;
-
-    OffsetSoFar += B->getKeyLength() + 1;
-  }
-
-  return Error::success();
-}
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Raw/PDBFileBuilder.cpp b/contrib/llvm/lib/DebugInfo/PDB/Raw/PDBFileBuilder.cpp
deleted file mode 100644
index 6fec0e3..0000000
--- a/contrib/llvm/lib/DebugInfo/PDB/Raw/PDBFileBuilder.cpp
+++ /dev/null
@@ -1,148 +0,0 @@
-//===- PDBFileBuilder.cpp - PDB File Creation -------------------*- C++ -*-===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/DebugInfo/PDB/Raw/PDBFileBuilder.h"
-
-#include "llvm/ADT/BitVector.h"
-
-#include "llvm/DebugInfo/MSF/MSFBuilder.h"
-#include "llvm/DebugInfo/MSF/StreamInterface.h"
-#include "llvm/DebugInfo/MSF/StreamWriter.h"
-#include "llvm/DebugInfo/PDB/GenericError.h"
-#include "llvm/DebugInfo/PDB/Raw/DbiStream.h"
-#include "llvm/DebugInfo/PDB/Raw/DbiStreamBuilder.h"
-#include "llvm/DebugInfo/PDB/Raw/InfoStream.h"
-#include "llvm/DebugInfo/PDB/Raw/InfoStreamBuilder.h"
-#include "llvm/DebugInfo/PDB/Raw/RawError.h"
-#include "llvm/DebugInfo/PDB/Raw/TpiStream.h"
-#include "llvm/DebugInfo/PDB/Raw/TpiStreamBuilder.h"
-
-using namespace llvm;
-using namespace llvm::codeview;
-using namespace llvm::msf;
-using namespace llvm::pdb;
-using namespace llvm::support;
-
-PDBFileBuilder::PDBFileBuilder(BumpPtrAllocator &Allocator)
-    : Allocator(Allocator) {}
-
-Error PDBFileBuilder::initialize(uint32_t BlockSize) {
-  auto ExpectedMsf = MSFBuilder::create(Allocator, BlockSize);
-  if (!ExpectedMsf)
-    return ExpectedMsf.takeError();
-  Msf = llvm::make_unique<MSFBuilder>(std::move(*ExpectedMsf));
-  return Error::success();
-}
-
-MSFBuilder &PDBFileBuilder::getMsfBuilder() { return *Msf; }
-
-InfoStreamBuilder &PDBFileBuilder::getInfoBuilder() {
-  if (!Info)
-    Info = llvm::make_unique<InfoStreamBuilder>(*Msf);
-  return *Info;
-}
-
-DbiStreamBuilder &PDBFileBuilder::getDbiBuilder() {
-  if (!Dbi)
-    Dbi = llvm::make_unique<DbiStreamBuilder>(*Msf);
-  return *Dbi;
-}
-
-TpiStreamBuilder &PDBFileBuilder::getTpiBuilder() {
-  if (!Tpi)
-    Tpi = llvm::make_unique<TpiStreamBuilder>(*Msf, StreamTPI);
-  return *Tpi;
-}
-
-TpiStreamBuilder &PDBFileBuilder::getIpiBuilder() {
-  if (!Ipi)
-    Ipi = llvm::make_unique<TpiStreamBuilder>(*Msf, StreamIPI);
-  return *Ipi;
-}
-
-Expected<msf::MSFLayout> PDBFileBuilder::finalizeMsfLayout() const {
-  if (Info) {
-    if (auto EC = Info->finalizeMsfLayout())
-      return std::move(EC);
-  }
-  if (Dbi) {
-    if (auto EC = Dbi->finalizeMsfLayout())
-      return std::move(EC);
-  }
-  if (Tpi) {
-    if (auto EC = Tpi->finalizeMsfLayout())
-      return std::move(EC);
-  }
-  if (Ipi) {
-    if (auto EC = Ipi->finalizeMsfLayout())
-      return std::move(EC);
-  }
-
-  return Msf->build();
-}
-
-Error PDBFileBuilder::commit(StringRef Filename) {
-  auto ExpectedLayout = finalizeMsfLayout();
-  if (!ExpectedLayout)
-    return ExpectedLayout.takeError();
-  auto &Layout = *ExpectedLayout;
-
-  uint64_t Filesize = Layout.SB->BlockSize * Layout.SB->NumBlocks;
-  auto OutFileOrError = FileOutputBuffer::create(Filename, Filesize);
-  if (OutFileOrError.getError())
-    return llvm::make_error<pdb::GenericError>(generic_error_code::invalid_path,
-                                               Filename);
-  FileBufferByteStream Buffer(std::move(*OutFileOrError));
-  StreamWriter Writer(Buffer);
-
-  if (auto EC = Writer.writeObject(*Layout.SB))
-    return EC;
-  uint32_t BlockMapOffset =
-      msf::blockToOffset(Layout.SB->BlockMapAddr, Layout.SB->BlockSize);
-  Writer.setOffset(BlockMapOffset);
-  if (auto EC = Writer.writeArray(Layout.DirectoryBlocks))
-    return EC;
-
-  auto DirStream =
-      WritableMappedBlockStream::createDirectoryStream(Layout, Buffer);
-  StreamWriter DW(*DirStream);
-  if (auto EC =
-          DW.writeInteger(static_cast<uint32_t>(Layout.StreamSizes.size())))
-    return EC;
-
-  if (auto EC = DW.writeArray(Layout.StreamSizes))
-    return EC;
-
-  for (const auto &Blocks : Layout.StreamMap) {
-    if (auto EC = DW.writeArray(Blocks))
-      return EC;
-  }
-
-  if (Info) {
-    if (auto EC = Info->commit(Layout, Buffer))
-      return EC;
-  }
-
-  if (Dbi) {
-    if (auto EC = Dbi->commit(Layout, Buffer))
-      return EC;
-  }
-
-  if (Tpi) {
-    if (auto EC = Tpi->commit(Layout, Buffer))
-      return EC;
-  }
-
-  if (Ipi) {
-    if (auto EC = Ipi->commit(Layout, Buffer))
-      return EC;
-  }
-
-  return Buffer.commit();
-}
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Raw/RawSession.cpp b/contrib/llvm/lib/DebugInfo/PDB/Raw/RawSession.cpp
deleted file mode 100644
index cd3a206..0000000
--- a/contrib/llvm/lib/DebugInfo/PDB/Raw/RawSession.cpp
+++ /dev/null
@@ -1,136 +0,0 @@
-//===- RawSession.cpp - Raw implementation of IPDBSession -------*- C++ -*-===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/ADT/STLExtras.h"
-#include "llvm/DebugInfo/MSF/ByteStream.h"
-#include "llvm/DebugInfo/PDB/GenericError.h"
-#include "llvm/DebugInfo/PDB/IPDBEnumChildren.h"
-#include "llvm/DebugInfo/PDB/IPDBSourceFile.h"
-#include "llvm/DebugInfo/PDB/PDBSymbolCompiland.h"
-#include "llvm/DebugInfo/PDB/PDBSymbolExe.h"
-#include "llvm/DebugInfo/PDB/Raw/PDBFile.h"
-#include "llvm/DebugInfo/PDB/Raw/RawError.h"
-#include "llvm/DebugInfo/PDB/Raw/RawSession.h"
-#include "llvm/Support/Allocator.h"
-#include "llvm/Support/Error.h"
-#include "llvm/Support/ErrorOr.h"
-#include "llvm/Support/MemoryBuffer.h"
-#include <algorithm>
-#include <memory>
-
-using namespace llvm;
-using namespace llvm::msf;
-using namespace llvm::pdb;
-
-RawSession::RawSession(std::unique_ptr<PDBFile> PdbFile,
-                       std::unique_ptr<BumpPtrAllocator> Allocator)
-    : Pdb(std::move(PdbFile)), Allocator(std::move(Allocator)) {}
-
-RawSession::~RawSession() = default;
-
-Error RawSession::createFromPdb(StringRef Path,
-                                std::unique_ptr<IPDBSession> &Session) {
-  ErrorOr<std::unique_ptr<MemoryBuffer>> ErrorOrBuffer =
-      MemoryBuffer::getFileOrSTDIN(Path, /*FileSize=*/-1,
-                                   /*RequiresNullTerminator=*/false);
-  if (!ErrorOrBuffer)
-    return make_error<GenericError>(generic_error_code::invalid_path);
-
-  std::unique_ptr<MemoryBuffer> Buffer = std::move(*ErrorOrBuffer);
-  auto Stream = llvm::make_unique<MemoryBufferByteStream>(std::move(Buffer));
-
-  auto Allocator = llvm::make_unique<BumpPtrAllocator>();
-  auto File = llvm::make_unique<PDBFile>(std::move(Stream), *Allocator);
-  if (auto EC = File->parseFileHeaders())
-    return EC;
-  if (auto EC = File->parseStreamData())
-    return EC;
-
-  Session =
-      llvm::make_unique<RawSession>(std::move(File), std::move(Allocator));
-
-  return Error::success();
-}
-
-Error RawSession::createFromExe(StringRef Path,
-                                std::unique_ptr<IPDBSession> &Session) {
-  return make_error<RawError>(raw_error_code::feature_unsupported);
-}
-
-uint64_t RawSession::getLoadAddress() const { return 0; }
-
-void RawSession::setLoadAddress(uint64_t Address) {}
-
-std::unique_ptr<PDBSymbolExe> RawSession::getGlobalScope() const {
-  return nullptr;
-}
-
-std::unique_ptr<PDBSymbol> RawSession::getSymbolById(uint32_t SymbolId) const {
-  return nullptr;
-}
-
-std::unique_ptr<PDBSymbol>
-RawSession::findSymbolByAddress(uint64_t Address, PDB_SymType Type) const {
-  return nullptr;
-}
-
-std::unique_ptr<IPDBEnumLineNumbers>
-RawSession::findLineNumbers(const PDBSymbolCompiland &Compiland,
-                            const IPDBSourceFile &File) const {
-  return nullptr;
-}
-
-std::unique_ptr<IPDBEnumLineNumbers>
-RawSession::findLineNumbersByAddress(uint64_t Address, uint32_t Length) const {
-  return nullptr;
-}
-
-std::unique_ptr<IPDBEnumSourceFiles>
-RawSession::findSourceFiles(const PDBSymbolCompiland *Compiland,
-                            StringRef Pattern,
-                            PDB_NameSearchFlags Flags) const {
-  return nullptr;
-}
-
-std::unique_ptr<IPDBSourceFile>
-RawSession::findOneSourceFile(const PDBSymbolCompiland *Compiland,
-                              StringRef Pattern,
-                              PDB_NameSearchFlags Flags) const {
-  return nullptr;
-}
-
-std::unique_ptr<IPDBEnumChildren<PDBSymbolCompiland>>
-RawSession::findCompilandsForSourceFile(StringRef Pattern,
-                                        PDB_NameSearchFlags Flags) const {
-  return nullptr;
-}
-
-std::unique_ptr<PDBSymbolCompiland>
-RawSession::findOneCompilandForSourceFile(StringRef Pattern,
-                                          PDB_NameSearchFlags Flags) const {
-  return nullptr;
-}
-
-std::unique_ptr<IPDBEnumSourceFiles> RawSession::getAllSourceFiles() const {
-  return nullptr;
-}
-
-std::unique_ptr<IPDBEnumSourceFiles> RawSession::getSourceFilesForCompiland(
-    const PDBSymbolCompiland &Compiland) const {
-  return nullptr;
-}
-
-std::unique_ptr<IPDBSourceFile>
-RawSession::getSourceFileById(uint32_t FileId) const {
-  return nullptr;
-}
-
-std::unique_ptr<IPDBEnumDataStreams> RawSession::getDebugStreams() const {
-  return nullptr;
-}
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Raw/TpiHashing.cpp b/contrib/llvm/lib/DebugInfo/PDB/Raw/TpiHashing.cpp
deleted file mode 100644
index 6c3ddb3..0000000
--- a/contrib/llvm/lib/DebugInfo/PDB/Raw/TpiHashing.cpp
+++ /dev/null
@@ -1,110 +0,0 @@
-//===- TpiHashing.cpp -----------------------------------------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/DebugInfo/PDB/Raw/TpiHashing.h"
-
-#include "llvm/DebugInfo/PDB/Raw/Hash.h"
-#include "llvm/DebugInfo/PDB/Raw/RawError.h"
-
-using namespace llvm;
-using namespace llvm::codeview;
-using namespace llvm::pdb;
-
-// Corresponds to `fUDTAnon`.
-template <typename T> static bool isAnonymous(T &Rec) {
-  StringRef Name = Rec.getName();
-  return Name == "<unnamed-tag>" || Name == "__unnamed" ||
-         Name.endswith("::<unnamed-tag>") || Name.endswith("::__unnamed");
-}
-
-// Computes a hash for a given TPI record.
-template <typename T>
-static uint32_t getTpiHash(T &Rec, ArrayRef<uint8_t> FullRecord) {
-  auto Opts = static_cast<uint16_t>(Rec.getOptions());
-
-  bool ForwardRef =
-      Opts & static_cast<uint16_t>(ClassOptions::ForwardReference);
-  bool Scoped = Opts & static_cast<uint16_t>(ClassOptions::Scoped);
-  bool UniqueName = Opts & static_cast<uint16_t>(ClassOptions::HasUniqueName);
-  bool IsAnon = UniqueName && isAnonymous(Rec);
-
-  if (!ForwardRef && !Scoped && !IsAnon)
-    return hashStringV1(Rec.getName());
-  if (!ForwardRef && UniqueName && !IsAnon)
-    return hashStringV1(Rec.getUniqueName());
-  return hashBufferV8(FullRecord);
-}
-
-template <typename T> static uint32_t getSourceLineHash(T &Rec) {
-  char Buf[4];
-  support::endian::write32le(Buf, Rec.getUDT().getIndex());
-  return hashStringV1(StringRef(Buf, 4));
-}
-
-void TpiHashUpdater::visitKnownRecordImpl(CVType &CVR,
-                                          UdtSourceLineRecord &Rec) {
-  CVR.Hash = getSourceLineHash(Rec);
-}
-
-void TpiHashUpdater::visitKnownRecordImpl(CVType &CVR,
-                                          UdtModSourceLineRecord &Rec) {
-  CVR.Hash = getSourceLineHash(Rec);
-}
-
-void TpiHashUpdater::visitKnownRecordImpl(CVType &CVR, ClassRecord &Rec) {
-  CVR.Hash = getTpiHash(Rec, CVR.data());
-}
-
-void TpiHashUpdater::visitKnownRecordImpl(CVType &CVR, EnumRecord &Rec) {
-  CVR.Hash = getTpiHash(Rec, CVR.data());
-}
-
-void TpiHashUpdater::visitKnownRecordImpl(CVType &CVR, UnionRecord &Rec) {
-  CVR.Hash = getTpiHash(Rec, CVR.data());
-}
-
-Error TpiHashVerifier::visitKnownRecord(CVType &CVR, UdtSourceLineRecord &Rec) {
-  return verifySourceLine(Rec.getUDT());
-}
-
-Error TpiHashVerifier::visitKnownRecord(CVType &CVR,
-                                        UdtModSourceLineRecord &Rec) {
-  return verifySourceLine(Rec.getUDT());
-}
-
-Error TpiHashVerifier::visitKnownRecord(CVType &CVR, ClassRecord &Rec) {
-  if (getTpiHash(Rec, CVR.data()) % NumHashBuckets != HashValues[Index])
-    return errorInvalidHash();
-  return Error::success();
-}
-Error TpiHashVerifier::visitKnownRecord(CVType &CVR, EnumRecord &Rec) {
-  if (getTpiHash(Rec, CVR.data()) % NumHashBuckets != HashValues[Index])
-    return errorInvalidHash();
-  return Error::success();
-}
-Error TpiHashVerifier::visitKnownRecord(CVType &CVR, UnionRecord &Rec) {
-  if (getTpiHash(Rec, CVR.data()) % NumHashBuckets != HashValues[Index])
-    return errorInvalidHash();
-  return Error::success();
-}
-
-Error TpiHashVerifier::verifySourceLine(codeview::TypeIndex TI) {
-  char Buf[4];
-  support::endian::write32le(Buf, TI.getIndex());
-  uint32_t Hash = hashStringV1(StringRef(Buf, 4));
-  if (Hash % NumHashBuckets != HashValues[Index])
-    return errorInvalidHash();
-  return Error::success();
-}
-
-Error TpiHashVerifier::visitTypeBegin(CVType &Rec) {
-  ++Index;
-  RawRecord = Rec;
-  return Error::success();
-}
diff --git a/contrib/llvm/lib/DebugInfo/PDB/Raw/TpiStreamBuilder.cpp b/contrib/llvm/lib/DebugInfo/PDB/Raw/TpiStreamBuilder.cpp
deleted file mode 100644
index c769321..0000000
--- a/contrib/llvm/lib/DebugInfo/PDB/Raw/TpiStreamBuilder.cpp
+++ /dev/null
@@ -1,145 +0,0 @@
-//===- TpiStreamBuilder.cpp -   -------------------------------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/ADT/ArrayRef.h"
-#include "llvm/ADT/STLExtras.h"
-#include "llvm/DebugInfo/CodeView/TypeIndex.h"
-#include "llvm/DebugInfo/CodeView/TypeRecord.h"
-#include "llvm/DebugInfo/MSF/ByteStream.h"
-#include "llvm/DebugInfo/MSF/MSFBuilder.h"
-#include "llvm/DebugInfo/MSF/MappedBlockStream.h"
-#include "llvm/DebugInfo/MSF/StreamArray.h"
-#include "llvm/DebugInfo/MSF/StreamReader.h"
-#include "llvm/DebugInfo/MSF/StreamWriter.h"
-#include "llvm/DebugInfo/PDB/Raw/PDBFile.h"
-#include "llvm/DebugInfo/PDB/Raw/RawError.h"
-#include "llvm/DebugInfo/PDB/Raw/RawTypes.h"
-#include "llvm/DebugInfo/PDB/Raw/TpiStream.h"
-#include "llvm/DebugInfo/PDB/Raw/TpiStreamBuilder.h"
-#include "llvm/Support/Allocator.h"
-#include "llvm/Support/Endian.h"
-#include "llvm/Support/Error.h"
-#include <algorithm>
-#include <cstdint>
-
-using namespace llvm;
-using namespace llvm::msf;
-using namespace llvm::pdb;
-using namespace llvm::support;
-
-TpiStreamBuilder::TpiStreamBuilder(MSFBuilder &Msf, uint32_t StreamIdx)
-    : Msf(Msf), Allocator(Msf.getAllocator()), Header(nullptr), Idx(StreamIdx) {
-}
-
-TpiStreamBuilder::~TpiStreamBuilder() = default;
-
-void TpiStreamBuilder::setVersionHeader(PdbRaw_TpiVer Version) {
-  VerHeader = Version;
-}
-
-void TpiStreamBuilder::addTypeRecord(const codeview::CVType &Record) {
-  TypeRecords.push_back(Record);
-  TypeRecordStream.setItems(TypeRecords);
-}
-
-Error TpiStreamBuilder::finalize() {
-  if (Header)
-    return Error::success();
-
-  TpiStreamHeader *H = Allocator.Allocate<TpiStreamHeader>();
-
-  uint32_t Count = TypeRecords.size();
-  uint32_t HashBufferSize = calculateHashBufferSize();
-
-  H->Version = *VerHeader;
-  H->HeaderSize = sizeof(TpiStreamHeader);
-  H->TypeIndexBegin = codeview::TypeIndex::FirstNonSimpleIndex;
-  H->TypeIndexEnd = H->TypeIndexBegin + Count;
-  H->TypeRecordBytes = TypeRecordStream.getLength();
-
-  H->HashStreamIndex = HashStreamIndex;
-  H->HashAuxStreamIndex = kInvalidStreamIndex;
-  H->HashKeySize = sizeof(ulittle32_t);
-  H->NumHashBuckets = MinTpiHashBuckets;
-
-  // Recall that hash values go into a completely different stream identified by
-  // the `HashStreamIndex` field of the `TpiStreamHeader`.  Therefore, the data
-  // begins at offset 0 of this independent stream.
-  H->HashValueBuffer.Off = 0;
-  H->HashValueBuffer.Length = HashBufferSize;
-  H->HashAdjBuffer.Off = H->HashValueBuffer.Off + H->HashValueBuffer.Length;
-  H->HashAdjBuffer.Length = 0;
-  H->IndexOffsetBuffer.Off = H->HashAdjBuffer.Off + H->HashAdjBuffer.Length;
-  H->IndexOffsetBuffer.Length = 0;
-
-  Header = H;
-  return Error::success();
-}
-
-uint32_t TpiStreamBuilder::calculateSerializedLength() const {
-  return sizeof(TpiStreamHeader) + TypeRecordStream.getLength();
-}
-
-uint32_t TpiStreamBuilder::calculateHashBufferSize() const {
-  if (TypeRecords.empty() || !TypeRecords[0].Hash.hasValue())
-    return 0;
-  return TypeRecords.size() * sizeof(ulittle32_t);
-}
-
-Error TpiStreamBuilder::finalizeMsfLayout() {
-  uint32_t Length = calculateSerializedLength();
-  if (auto EC = Msf.setStreamSize(Idx, Length))
-    return EC;
-
-  uint32_t HashBufferSize = calculateHashBufferSize();
-
-  if (HashBufferSize == 0)
-    return Error::success();
-
-  auto ExpectedIndex = Msf.addStream(HashBufferSize);
-  if (!ExpectedIndex)
-    return ExpectedIndex.takeError();
-  HashStreamIndex = *ExpectedIndex;
-  ulittle32_t *H = Allocator.Allocate<ulittle32_t>(TypeRecords.size());
-  MutableArrayRef<ulittle32_t> HashBuffer(H, TypeRecords.size());
-  for (uint32_t I = 0; I < TypeRecords.size(); ++I) {
-    HashBuffer[I] = *TypeRecords[I].Hash % MinTpiHashBuckets;
-  }
-  ArrayRef<uint8_t> Bytes(reinterpret_cast<const uint8_t *>(HashBuffer.data()),
-                          HashBufferSize);
-  HashValueStream = llvm::make_unique<ByteStream>(Bytes);
-  return Error::success();
-}
-
-Error TpiStreamBuilder::commit(const msf::MSFLayout &Layout,
-                               const msf::WritableStream &Buffer) {
-  if (auto EC = finalize())
-    return EC;
-
-  auto InfoS =
-      WritableMappedBlockStream::createIndexedStream(Layout, Buffer, Idx);
-
-  StreamWriter Writer(*InfoS);
-  if (auto EC = Writer.writeObject(*Header))
-    return EC;
-
-  auto RecordArray = VarStreamArray<codeview::CVType>(TypeRecordStream);
-  if (auto EC = Writer.writeArray(RecordArray))
-    return EC;
-
-  if (HashStreamIndex != kInvalidStreamIndex) {
-    auto HVS = WritableMappedBlockStream::createIndexedStream(Layout, Buffer,
-                                                              HashStreamIndex);
-    StreamWriter HW(*HVS);
-    if (auto EC = HW.writeStreamRef(*HashValueStream))
-      return EC;
-  }
-
-  return Error::success();
-}
diff --git a/contrib/llvm/lib/DebugInfo/PDB/UDTLayout.cpp b/contrib/llvm/lib/DebugInfo/PDB/UDTLayout.cpp
new file mode 100644
index 0000000..5f4390b
--- /dev/null
+++ b/contrib/llvm/lib/DebugInfo/PDB/UDTLayout.cpp
@@ -0,0 +1,303 @@
+//===- UDTLayout.cpp ------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/PDB/UDTLayout.h"
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/BitVector.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/DebugInfo/PDB/IPDBRawSymbol.h"
+#include "llvm/DebugInfo/PDB/IPDBSession.h"
+#include "llvm/DebugInfo/PDB/PDBSymbol.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolData.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolFunc.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypeBaseClass.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypeBuiltin.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypePointer.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypeUDT.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypeVTable.h"
+#include "llvm/DebugInfo/PDB/PDBTypes.h"
+#include "llvm/Support/Casting.h"
+#include <algorithm>
+#include <cassert>
+#include <cstdint>
+#include <memory>
+
+using namespace llvm;
+using namespace llvm::pdb;
+
+static std::unique_ptr<PDBSymbol> getSymbolType(const PDBSymbol &Symbol) {
+  const IPDBSession &Session = Symbol.getSession();
+  const IPDBRawSymbol &RawSymbol = Symbol.getRawSymbol();
+  uint32_t TypeId = RawSymbol.getTypeId();
+  return Session.getSymbolById(TypeId);
+}
+
+static uint32_t getTypeLength(const PDBSymbol &Symbol) {
+  auto SymbolType = getSymbolType(Symbol);
+  const IPDBRawSymbol &RawType = SymbolType->getRawSymbol();
+
+  return RawType.getLength();
+}
+
+LayoutItemBase::LayoutItemBase(const UDTLayoutBase *Parent,
+                               const PDBSymbol *Symbol, const std::string &Name,
+                               uint32_t OffsetInParent, uint32_t Size,
+                               bool IsElided)
+    : Symbol(Symbol), Parent(Parent), Name(Name),
+      OffsetInParent(OffsetInParent), SizeOf(Size), LayoutSize(Size),
+      IsElided(IsElided) {
+  UsedBytes.resize(SizeOf, true);
+}
+
+uint32_t LayoutItemBase::deepPaddingSize() const {
+  return UsedBytes.size() - UsedBytes.count();
+}
+
+uint32_t LayoutItemBase::tailPadding() const {
+  int Last = UsedBytes.find_last();
+
+  return UsedBytes.size() - (Last + 1);
+}
+
+DataMemberLayoutItem::DataMemberLayoutItem(
+    const UDTLayoutBase &Parent, std::unique_ptr<PDBSymbolData> Member)
+    : LayoutItemBase(&Parent, Member.get(), Member->getName(),
+                     Member->getOffset(), getTypeLength(*Member), false),
+      DataMember(std::move(Member)) {
+  auto Type = DataMember->getType();
+  if (auto UDT = unique_dyn_cast<PDBSymbolTypeUDT>(Type)) {
+    UdtLayout = llvm::make_unique<ClassLayout>(std::move(UDT));
+    UsedBytes = UdtLayout->usedBytes();
+  }
+}
+
+VBPtrLayoutItem::VBPtrLayoutItem(const UDTLayoutBase &Parent,
+                                 std::unique_ptr<PDBSymbolTypeBuiltin> Sym,
+                                 uint32_t Offset, uint32_t Size)
+    : LayoutItemBase(&Parent, Sym.get(), "<vbptr>", Offset, Size, false),
+      Type(std::move(Sym)) {
+}
+
+const PDBSymbolData &DataMemberLayoutItem::getDataMember() {
+  return *dyn_cast<PDBSymbolData>(Symbol);
+}
+
+bool DataMemberLayoutItem::hasUDTLayout() const { return UdtLayout != nullptr; }
+
+const ClassLayout &DataMemberLayoutItem::getUDTLayout() const {
+  return *UdtLayout;
+}
+
+VTableLayoutItem::VTableLayoutItem(const UDTLayoutBase &Parent,
+                                   std::unique_ptr<PDBSymbolTypeVTable> VT)
+    : LayoutItemBase(&Parent, VT.get(), "<vtbl>", 0, getTypeLength(*VT), false),
+      VTable(std::move(VT)) {
+  auto VTableType = cast<PDBSymbolTypePointer>(VTable->getType());
+  ElementSize = VTableType->getLength();
+}
+
+UDTLayoutBase::UDTLayoutBase(const UDTLayoutBase *Parent, const PDBSymbol &Sym,
+                             const std::string &Name, uint32_t OffsetInParent,
+                             uint32_t Size, bool IsElided)
+    : LayoutItemBase(Parent, &Sym, Name, OffsetInParent, Size, IsElided) {
+  // UDT storage comes from a union of all the children's storage, so start out
+  // uninitialized.
+  UsedBytes.reset(0, Size);
+
+  initializeChildren(Sym);
+  if (LayoutSize < Size)
+    UsedBytes.resize(LayoutSize);
+}
+
+uint32_t UDTLayoutBase::tailPadding() const {
+  uint32_t Abs = LayoutItemBase::tailPadding();
+  if (!LayoutItems.empty()) {
+    const LayoutItemBase *Back = LayoutItems.back();
+    uint32_t ChildPadding = Back->LayoutItemBase::tailPadding();
+    if (Abs < ChildPadding)
+      Abs = 0;
+    else
+      Abs -= ChildPadding;
+  }
+  return Abs;
+}
+
+ClassLayout::ClassLayout(const PDBSymbolTypeUDT &UDT)
+    : UDTLayoutBase(nullptr, UDT, UDT.getName(), 0, UDT.getLength(), false),
+      UDT(UDT) {
+  ImmediateUsedBytes.resize(SizeOf, false);
+  for (auto &LI : LayoutItems) {
+    uint32_t Begin = LI->getOffsetInParent();
+    uint32_t End = Begin + LI->getLayoutSize();
+    End = std::min(SizeOf, End);
+    ImmediateUsedBytes.set(Begin, End);
+  }
+}
+
+ClassLayout::ClassLayout(std::unique_ptr<PDBSymbolTypeUDT> UDT)
+    : ClassLayout(*UDT) {
+  OwnedStorage = std::move(UDT);
+}
+
+uint32_t ClassLayout::immediatePadding() const {
+  return SizeOf - ImmediateUsedBytes.count();
+}
+
+BaseClassLayout::BaseClassLayout(const UDTLayoutBase &Parent,
+                                 uint32_t OffsetInParent, bool Elide,
+                                 std::unique_ptr<PDBSymbolTypeBaseClass> B)
+    : UDTLayoutBase(&Parent, *B, B->getName(), OffsetInParent, B->getLength(),
+                    Elide),
+      Base(std::move(B)) {
+  if (isEmptyBase()) {
+    // Special case an empty base so that it doesn't get treated as padding.
+    UsedBytes.resize(1);
+    UsedBytes.set(0);
+  }
+  IsVirtualBase = Base->isVirtualBaseClass();
+}
+
+void UDTLayoutBase::initializeChildren(const PDBSymbol &Sym) {
+  // Handled bases first, followed by VTables, followed by data members,
+  // followed by functions, followed by other.  This ordering is necessary
+  // so that bases and vtables get initialized before any functions which
+  // may override them.
+  UniquePtrVector<PDBSymbolTypeBaseClass> Bases;
+  UniquePtrVector<PDBSymbolTypeVTable> VTables;
+  UniquePtrVector<PDBSymbolData> Members;
+  UniquePtrVector<PDBSymbolTypeBaseClass> VirtualBaseSyms;
+
+  auto Children = Sym.findAllChildren();
+  while (auto Child = Children->getNext()) {
+    if (auto Base = unique_dyn_cast<PDBSymbolTypeBaseClass>(Child)) {
+      if (Base->isVirtualBaseClass())
+        VirtualBaseSyms.push_back(std::move(Base));
+      else
+        Bases.push_back(std::move(Base));
+    }
+    else if (auto Data = unique_dyn_cast<PDBSymbolData>(Child)) {
+      if (Data->getDataKind() == PDB_DataKind::Member)
+        Members.push_back(std::move(Data));
+      else
+        Other.push_back(std::move(Data));
+    } else if (auto VT = unique_dyn_cast<PDBSymbolTypeVTable>(Child))
+      VTables.push_back(std::move(VT));
+    else if (auto Func = unique_dyn_cast<PDBSymbolFunc>(Child))
+      Funcs.push_back(std::move(Func));
+    else {
+      Other.push_back(std::move(Child));
+    }
+  }
+
+  // We don't want to have any re-allocations in the list of bases, so make
+  // sure to reserve enough space so that our ArrayRefs don't get invalidated.
+  AllBases.reserve(Bases.size() + VirtualBaseSyms.size());
+
+  // Only add non-virtual bases to the class first.  Only at the end of the
+  // class, after all non-virtual bases and data members have been added do we
+  // add virtual bases.  This way the offsets are correctly aligned when we go
+  // to lay out virtual bases.
+  for (auto &Base : Bases) {
+    uint32_t Offset = Base->getOffset();
+    // Non-virtual bases never get elided.
+    auto BL = llvm::make_unique<BaseClassLayout>(*this, Offset, false,
+                                                 std::move(Base));
+
+    AllBases.push_back(BL.get());
+    addChildToLayout(std::move(BL));
+  }
+  NonVirtualBases = AllBases;
+
+  assert(VTables.size() <= 1);
+  if (!VTables.empty()) {
+    auto VTLayout =
+        llvm::make_unique<VTableLayoutItem>(*this, std::move(VTables[0]));
+
+    VTable = VTLayout.get();
+
+    addChildToLayout(std::move(VTLayout));
+  }
+
+  for (auto &Data : Members) {
+    auto DM = llvm::make_unique<DataMemberLayoutItem>(*this, std::move(Data));
+
+    addChildToLayout(std::move(DM));
+  }
+
+  // Make sure add virtual bases before adding functions, since functions may be
+  // overrides of virtual functions declared in a virtual base, so the VTables
+  // and virtual intros need to be correctly initialized.
+  for (auto &VB : VirtualBaseSyms) {
+    int VBPO = VB->getVirtualBasePointerOffset();
+    if (!hasVBPtrAtOffset(VBPO)) {
+      if (auto VBP = VB->getRawSymbol().getVirtualBaseTableType()) {
+        auto VBPL = llvm::make_unique<VBPtrLayoutItem>(*this, std::move(VBP),
+                                                       VBPO, VBP->getLength());
+        VBPtr = VBPL.get();
+        addChildToLayout(std::move(VBPL));
+      }
+    }
+
+    // Virtual bases always go at the end.  So just look for the last place we
+    // ended when writing something, and put our virtual base there.
+    // Note that virtual bases get elided unless this is a top-most derived
+    // class.
+    uint32_t Offset = UsedBytes.find_last() + 1;
+    bool Elide = (Parent != nullptr);
+    auto BL =
+        llvm::make_unique<BaseClassLayout>(*this, Offset, Elide, std::move(VB));
+    AllBases.push_back(BL.get());
+
+    // Only lay this virtual base out directly inside of *this* class if this
+    // is a top-most derived class.  Keep track of it regardless, but only
+    // physically lay it out if it's a topmost derived class.
+    addChildToLayout(std::move(BL));
+  }
+  VirtualBases = makeArrayRef(AllBases).drop_front(NonVirtualBases.size());
+
+  if (Parent != nullptr)
+    LayoutSize = UsedBytes.find_last() + 1;
+}
+
+bool UDTLayoutBase::hasVBPtrAtOffset(uint32_t Off) const {
+  if (VBPtr && VBPtr->getOffsetInParent() == Off)
+    return true;
+  for (BaseClassLayout *BL : AllBases) {
+    if (BL->hasVBPtrAtOffset(Off - BL->getOffsetInParent()))
+      return true;
+  }
+  return false;
+}
+
+void UDTLayoutBase::addChildToLayout(std::unique_ptr<LayoutItemBase> Child) {
+  uint32_t Begin = Child->getOffsetInParent();
+
+  if (!Child->isElided()) {
+    BitVector ChildBytes = Child->usedBytes();
+
+    // Suppose the child occupies 4 bytes starting at offset 12 in a 32 byte
+    // class.  When we call ChildBytes.resize(32), the Child's storage will
+    // still begin at offset 0, so we need to shift it left by offset bytes
+    // to get it into the right position.
+    ChildBytes.resize(UsedBytes.size());
+    ChildBytes <<= Child->getOffsetInParent();
+    UsedBytes |= ChildBytes;
+
+    if (ChildBytes.count() > 0) {
+      auto Loc = std::upper_bound(LayoutItems.begin(), LayoutItems.end(), Begin,
+                                  [](uint32_t Off, const LayoutItemBase *Item) {
+                                    return (Off < Item->getOffsetInParent());
+                                  });
+
+      LayoutItems.insert(Loc, Child.get());
+    }
+  }
+
+  ChildStorage.push_back(std::move(Child));
+}