MFC r309124:

Upgrade our copies of clang, llvm, lldb, compiler-rt and libc++ to 3.9.0
release, and add lld 3.9.0.  Also completely revamp the build system for
clang, llvm, lldb and their related tools.

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

Release notes for llvm, clang and lld are available here:
<http://llvm.org/releases/3.9.0/docs/ReleaseNotes.html>
<http://llvm.org/releases/3.9.0/tools/clang/docs/ReleaseNotes.html>
<http://llvm.org/releases/3.9.0/tools/lld/docs/ReleaseNotes.html>

Thanks to Ed Maste, Bryan Drewery, Andrew Turner, Antoine Brodin and Jan
Beich for their help.

Relnotes:	yes

MFC r309147:

Pull in r282174 from upstream llvm trunk (by Krzysztof Parzyszek):

  [PPC] Set SP after loading data from stack frame, if no red zone is
  present

  Follow-up to r280705: Make sure that the SP is only restored after
  all data is loaded from the stack frame, if there is no red zone.

  This completes the fix for
  https://llvm.org/bugs/show_bug.cgi?id=26519.

  Differential Revision: https://reviews.llvm.org/D24466

Reported by:    Mark Millard
PR:             214433

MFC r309149:

Pull in r283060 from upstream llvm trunk (by Hal Finkel):

  [PowerPC] Refactor soft-float support, and enable PPC64 soft float

  This change enables soft-float for PowerPC64, and also makes
  soft-float disable all vector instruction sets for both 32-bit and
  64-bit modes. This latter part is necessary because the PPC backend
  canonicalizes many Altivec vector types to floating-point types, and
  so soft-float breaks scalarization support for many operations. Both
  for embedded targets and for operating-system kernels desiring
  soft-float support, it seems reasonable that disabling hardware
  floating-point also disables vector instructions (embedded targets
  without hardware floating point support are unlikely to have Altivec,
  etc. and operating system kernels desiring not to use floating-point
  registers to lower syscall cost are unlikely to want to use vector
  registers either). If someone needs this to work, we'll need to
  change the fact that we promote many Altivec operations to act on
  v4f32. To make it possible to disable Altivec when soft-float is
  enabled, hardware floating-point support needs to be expressed as a
  positive feature, like the others, and not a negative feature,
  because target features cannot have dependencies on the disabling of
  some other feature. So +soft-float has now become -hard-float.

  Fixes PR26970.

Pull in r283061 from upstream clang trunk (by Hal Finkel):

  [PowerPC] Enable soft-float for PPC64, and +soft-float -> -hard-float

  Enable soft-float support on PPC64, as the backend now supports it.
  Also, the backend now uses -hard-float instead of +soft-float, so set
  the target features accordingly.

  Fixes PR26970.

Reported by:	Mark Millard
PR:		214433

MFC r309212:

Add a few missed clang 3.9.0 files to OptionalObsoleteFiles.

MFC r309262:

Fix packaging for clang, lldb and lld 3.9.0

During the upgrade of clang/llvm etc to 3.9.0 in r309124, the PACKAGE
directive in the usr.bin/clang/*.mk files got dropped accidentally.

Restore it, with a few minor changes and additions:
* Correct license in clang.ucl to NCSA
* Add PACKAGE=clang for clang and most of the "ll" tools
* Put lldb in its own package
* Put lld in its own package

Reviewed by:	gjb, jmallett
Differential Revision: https://reviews.freebsd.org/D8666

MFC r309656:

During the bootstrap phase, when building the minimal llvm library on
PowerPC, add lib/Support/Atomic.cpp.  This is needed because upstream
llvm revision r271821 disabled the use of std::call_once, which causes
some fallback functions from Atomic.cpp to be used instead.

Reported by:	Mark Millard
PR:		214902

MFC r309835:

Tentatively apply https://reviews.llvm.org/D18730 to work around gcc PR
70528 (bogus error: constructor required before non-static data member).
This should fix buildworld with the external gcc package.

Reported by:	https://jenkins.freebsd.org/job/FreeBSD_HEAD_amd64_gcc/

MFC r310194:

Upgrade our copies of clang, llvm, lld, lldb, compiler-rt and libc++ to
3.9.1 release.

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

Release notes for llvm, clang and lld will be available here:
<http://releases.llvm.org/3.9.1/docs/ReleaseNotes.html>
<http://releases.llvm.org/3.9.1/tools/clang/docs/ReleaseNotes.html>
<http://releases.llvm.org/3.9.1/tools/lld/docs/ReleaseNotes.html>

Relnotes:	yes

1 files changed, 273 insertions, 0 deletions

diff --git a/contrib/llvm/lib/DebugInfo/PDB/Raw/TpiStream.cpp b/contrib/llvm/lib/DebugInfo/PDB/Raw/TpiStream.cpp
new file mode 100644
index 0000000..5617e57
--- /dev/null
+++ b/contrib/llvm/lib/DebugInfo/PDB/Raw/TpiStream.cpp
@@ -0,0 +1,273 @@
+//===- TpiStream.cpp - PDB Type Info (TPI) Stream 2 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/Raw/TpiStream.h"
+
+#include "llvm/DebugInfo/CodeView/CVTypeVisitor.h"
+#include "llvm/DebugInfo/CodeView/CodeView.h"
+#include "llvm/DebugInfo/CodeView/StreamReader.h"
+#include "llvm/DebugInfo/CodeView/TypeIndex.h"
+#include "llvm/DebugInfo/CodeView/TypeRecord.h"
+#include "llvm/DebugInfo/PDB/Raw/Hash.h"
+#include "llvm/DebugInfo/PDB/Raw/IndexedStreamData.h"
+#include "llvm/DebugInfo/PDB/Raw/MappedBlockStream.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/Support/Endian.h"
+
+using namespace llvm;
+using namespace llvm::codeview;
+using namespace llvm::support;
+using namespace llvm::pdb;
+
+namespace {
+const uint32_t MinHashBuckets = 0x1000;
+const uint32_t MaxHashBuckets = 0x40000;
+}
+
+// This corresponds to `HDR` in PDB/dbi/tpi.h.
+struct TpiStream::HeaderInfo {
+  struct EmbeddedBuf {
+    little32_t Off;
+    ulittle32_t Length;
+  };
+
+  ulittle32_t Version;
+  ulittle32_t HeaderSize;
+  ulittle32_t TypeIndexBegin;
+  ulittle32_t TypeIndexEnd;
+  ulittle32_t TypeRecordBytes;
+
+  // The following members correspond to `TpiHash` in PDB/dbi/tpi.h.
+  ulittle16_t HashStreamIndex;
+  ulittle16_t HashAuxStreamIndex;
+  ulittle32_t HashKeySize;
+  ulittle32_t NumHashBuckets;
+
+  EmbeddedBuf HashValueBuffer;
+  EmbeddedBuf IndexOffsetBuffer;
+  EmbeddedBuf HashAdjBuffer;
+};
+
+TpiStream::TpiStream(const PDBFile &File,
+                     std::unique_ptr<MappedBlockStream> Stream)
+    : Pdb(File), Stream(std::move(Stream)) {}
+
+TpiStream::~TpiStream() {}
+
+// 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, const CVRecord<TypeLeafKind> &RawRec) {
+  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(RawRec.RawData);
+}
+
+namespace {
+class TpiHashVerifier : public TypeVisitorCallbacks {
+public:
+  TpiHashVerifier(FixedStreamArray<support::ulittle32_t> &HashValues,
+                  uint32_t NumHashBuckets)
+      : HashValues(HashValues), NumHashBuckets(NumHashBuckets) {}
+
+  Error visitUdtSourceLine(UdtSourceLineRecord &Rec) override {
+    return verifySourceLine(Rec);
+  }
+
+  Error visitUdtModSourceLine(UdtModSourceLineRecord &Rec) override {
+    return verifySourceLine(Rec);
+  }
+
+  Error visitClass(ClassRecord &Rec) override { return verify(Rec); }
+  Error visitEnum(EnumRecord &Rec) override { return verify(Rec); }
+  Error visitUnion(UnionRecord &Rec) override { return verify(Rec); }
+
+  Error visitTypeBegin(const CVRecord<TypeLeafKind> &Rec) override {
+    ++Index;
+    RawRecord = &Rec;
+    return Error::success();
+  }
+
+private:
+  template <typename T> Error verify(T &Rec) {
+    uint32_t Hash = getTpiHash(Rec, *RawRecord);
+    if (Hash % NumHashBuckets != HashValues[Index])
+      return errorInvalidHash();
+    return Error::success();
+  }
+
+  template <typename T> Error verifySourceLine(T &Rec) {
+    char Buf[4];
+    support::endian::write32le(Buf, Rec.getUDT().getIndex());
+    uint32_t Hash = hashStringV1(StringRef(Buf, 4));
+    if (Hash % NumHashBuckets != HashValues[Index])
+      return errorInvalidHash();
+    return Error::success();
+  }
+
+  Error errorInvalidHash() {
+    return make_error<RawError>(
+        raw_error_code::invalid_tpi_hash,
+        "Type index is 0x" + utohexstr(TypeIndex::FirstNonSimpleIndex + Index));
+  }
+
+  FixedStreamArray<support::ulittle32_t> HashValues;
+  const CVRecord<TypeLeafKind> *RawRecord;
+  uint32_t NumHashBuckets;
+  uint32_t Index = -1;
+};
+}
+
+// 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);
+  CVTypeVisitor Visitor(Verifier);
+  return Visitor.visitTypeStream(TypeRecords);
+}
+
+Error TpiStream::reload() {
+  StreamReader Reader(*Stream);
+
+  if (Reader.bytesRemaining() < sizeof(HeaderInfo))
+    return make_error<RawError>(raw_error_code::corrupt_file,
+                                "TPI Stream does not contain a header.");
+
+  if (Reader.readObject(Header))
+    return make_error<RawError>(raw_error_code::corrupt_file,
+                                "TPI Stream does not contain a header.");
+
+  if (Header->Version != PdbTpiV80)
+    return make_error<RawError>(raw_error_code::corrupt_file,
+                                "Unsupported TPI Version.");
+
+  if (Header->HeaderSize != sizeof(HeaderInfo))
+    return make_error<RawError>(raw_error_code::corrupt_file,
+                                "Corrupt TPI Header size.");
+
+  if (Header->HashKeySize != sizeof(ulittle32_t))
+    return make_error<RawError>(raw_error_code::corrupt_file,
+                                "TPI Stream expected 4 byte hash key size.");
+
+  if (Header->NumHashBuckets < MinHashBuckets ||
+      Header->NumHashBuckets > MaxHashBuckets)
+    return make_error<RawError>(raw_error_code::corrupt_file,
+                                "TPI Stream Invalid number of hash buckets.");
+
+  // The actual type records themselves come from this stream
+  if (auto EC = Reader.readArray(TypeRecords, Header->TypeRecordBytes))
+    return EC;
+
+  // Hash indices, hash values, etc come from the hash stream.
+  if (Header->HashStreamIndex >= Pdb.getNumStreams())
+    return make_error<RawError>(raw_error_code::corrupt_file,
+                                "Invalid TPI hash stream index.");
+
+  auto HS =
+      MappedBlockStream::createIndexedStream(Header->HashStreamIndex, Pdb);
+  if (!HS)
+    return HS.takeError();
+  StreamReader HSR(**HS);
+
+  uint32_t NumHashValues = Header->HashValueBuffer.Length / sizeof(ulittle32_t);
+  if (NumHashValues != NumTypeRecords())
+    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;
+
+  HSR.setOffset(Header->IndexOffsetBuffer.Off);
+  uint32_t NumTypeIndexOffsets =
+      Header->IndexOffsetBuffer.Length / sizeof(TypeIndexOffset);
+  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;
+
+  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;
+
+  return Error::success();
+}
+
+PdbRaw_TpiVer TpiStream::getTpiVersion() const {
+  uint32_t Value = Header->Version;
+  return static_cast<PdbRaw_TpiVer>(Value);
+}
+
+uint32_t TpiStream::TypeIndexBegin() const { return Header->TypeIndexBegin; }
+
+uint32_t TpiStream::TypeIndexEnd() const { return Header->TypeIndexEnd; }
+
+uint32_t TpiStream::NumTypeRecords() const {
+  return TypeIndexEnd() - TypeIndexBegin();
+}
+
+uint16_t TpiStream::getTypeHashStreamIndex() const {
+  return Header->HashStreamIndex;
+}
+
+uint16_t TpiStream::getTypeHashStreamAuxIndex() const {
+  return Header->HashAuxStreamIndex;
+}
+
+uint32_t TpiStream::NumHashBuckets() const { return Header->NumHashBuckets; }
+uint32_t TpiStream::getHashKeySize() const { return Header->HashKeySize; }
+
+FixedStreamArray<support::ulittle32_t>
+TpiStream::getHashValues() const {
+  return HashValues;
+}
+
+FixedStreamArray<TypeIndexOffset>
+TpiStream::getTypeIndexOffsets() const {
+  return TypeIndexOffsets;
+}
+
+FixedStreamArray<TypeIndexOffset>
+TpiStream::getHashAdjustments() const {
+  return HashAdjustments;
+}
+
+iterator_range<CVTypeArray::Iterator>
+TpiStream::types(bool *HadError) const {
+  return llvm::make_range(TypeRecords.begin(HadError), TypeRecords.end());
+}
+
+Error TpiStream::commit() { return Error::success(); }