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, 124 insertions, 26 deletions

diff --git a/contrib/llvm/lib/Support/Windows/Path.inc b/contrib/llvm/lib/Support/Windows/Path.inc
index 5ef77b1..fab6aec 100644
--- a/contrib/llvm/lib/Support/Windows/Path.inc
+++ b/contrib/llvm/lib/Support/Windows/Path.inc
@@ -151,6 +151,29 @@ UniqueID file_status::getUniqueID() const {
   return UniqueID(VolumeSerialNumber, FileID);
 }
 
+ErrorOr<space_info> disk_space(const Twine &Path) {
+  ULARGE_INTEGER Avail, Total, Free;
+  if (!::GetDiskFreeSpaceExA(Path.str().c_str(), &Avail, &Total, &Free))
+    return mapWindowsError(::GetLastError());
+  space_info SpaceInfo;
+  SpaceInfo.capacity =
+      (static_cast<uint64_t>(Total.HighPart) << 32) + Total.LowPart;
+  SpaceInfo.free = (static_cast<uint64_t>(Free.HighPart) << 32) + Free.LowPart;
+  SpaceInfo.available =
+      (static_cast<uint64_t>(Avail.HighPart) << 32) + Avail.LowPart;
+  return SpaceInfo;
+}
+
+TimeValue file_status::getLastAccessedTime() const {
+  ULARGE_INTEGER UI;
+  UI.LowPart = LastAccessedTimeLow;
+  UI.HighPart = LastAccessedTimeHigh;
+
+  TimeValue Ret;
+  Ret.fromWin32Time(UI.QuadPart);
+  return Ret;
+}
+
 TimeValue file_status::getLastModificationTime() const {
   ULARGE_INTEGER UI;
   UI.LowPart = LastWriteTimeLow;
@@ -255,24 +278,43 @@ std::error_code rename(const Twine &from, const Twine &to) {
 
   std::error_code ec = std::error_code();
 
-  // Retry while we see ERROR_ACCESS_DENIED.
+  // Retry while we see recoverable errors.
   // System scanners (eg. indexer) might open the source file when it is written
   // and closed.
 
-  for (int i = 0; i < 2000; i++) {
-    // Try ReplaceFile first, as it is able to associate a new data stream with
-    // the destination even if the destination file is currently open.
-    if (::ReplaceFileW(wide_to.begin(), wide_from.begin(), NULL, 0, NULL, NULL))
-      return std::error_code();
+  bool TryReplace = true;
 
-    // We get ERROR_FILE_NOT_FOUND if the destination file is missing.
-    // MoveFileEx can handle this case.
-    DWORD ReplaceError = ::GetLastError();
-    ec = mapWindowsError(ReplaceError);
-    if (ReplaceError != ERROR_ACCESS_DENIED &&
-        ReplaceError != ERROR_FILE_NOT_FOUND &&
-        ReplaceError != ERROR_SHARING_VIOLATION)
-      break;
+  for (int i = 0; i < 2000; i++) {
+    if (i > 0)
+      ::Sleep(1);
+
+    if (TryReplace) {
+      // Try ReplaceFile first, as it is able to associate a new data stream
+      // with the destination even if the destination file is currently open.
+      if (::ReplaceFileW(wide_to.data(), wide_from.data(), NULL, 0, NULL, NULL))
+        return std::error_code();
+
+      DWORD ReplaceError = ::GetLastError();
+      ec = mapWindowsError(ReplaceError);
+
+      // If ReplaceFileW returned ERROR_UNABLE_TO_MOVE_REPLACEMENT or
+      // ERROR_UNABLE_TO_MOVE_REPLACEMENT_2, retry but only use MoveFileExW().
+      if (ReplaceError == ERROR_UNABLE_TO_MOVE_REPLACEMENT ||
+          ReplaceError == ERROR_UNABLE_TO_MOVE_REPLACEMENT_2) {
+        TryReplace = false;
+        continue;
+      }
+      // If ReplaceFileW returned ERROR_UNABLE_TO_REMOVE_REPLACED, retry
+      // using ReplaceFileW().
+      if (ReplaceError == ERROR_UNABLE_TO_REMOVE_REPLACED)
+        continue;
+      // We get ERROR_FILE_NOT_FOUND if the destination file is missing.
+      // MoveFileEx can handle this case.
+      if (ReplaceError != ERROR_ACCESS_DENIED &&
+          ReplaceError != ERROR_FILE_NOT_FOUND &&
+          ReplaceError != ERROR_SHARING_VIOLATION)
+        break;
+    }
 
     if (::MoveFileExW(wide_from.begin(), wide_to.begin(),
                       MOVEFILE_COPY_ALLOWED | MOVEFILE_REPLACE_EXISTING))
@@ -281,8 +323,6 @@ std::error_code rename(const Twine &from, const Twine &to) {
     DWORD MoveError = ::GetLastError();
     ec = mapWindowsError(MoveError);
     if (MoveError != ERROR_ACCESS_DENIED) break;
-
-    ::Sleep(1);
   }
 
   return ec;
@@ -327,13 +367,15 @@ bool can_execute(const Twine &Path) {
 
 bool equivalent(file_status A, file_status B) {
   assert(status_known(A) && status_known(B));
-  return A.FileIndexHigh      == B.FileIndexHigh &&
-         A.FileIndexLow       == B.FileIndexLow &&
-         A.FileSizeHigh       == B.FileSizeHigh &&
-         A.FileSizeLow        == B.FileSizeLow &&
-         A.LastWriteTimeHigh  == B.LastWriteTimeHigh &&
-         A.LastWriteTimeLow   == B.LastWriteTimeLow &&
-         A.VolumeSerialNumber == B.VolumeSerialNumber;
+  return A.FileIndexHigh         == B.FileIndexHigh &&
+         A.FileIndexLow          == B.FileIndexLow &&
+         A.FileSizeHigh          == B.FileSizeHigh &&
+         A.FileSizeLow           == B.FileSizeLow &&
+         A.LastAccessedTimeHigh  == B.LastAccessedTimeHigh &&
+         A.LastAccessedTimeLow   == B.LastAccessedTimeLow &&
+         A.LastWriteTimeHigh     == B.LastWriteTimeHigh &&
+         A.LastWriteTimeLow      == B.LastWriteTimeLow &&
+         A.VolumeSerialNumber    == B.VolumeSerialNumber;
 }
 
 std::error_code equivalent(const Twine &A, const Twine &B, bool &result) {
@@ -361,7 +403,7 @@ static bool isReservedName(StringRef path) {
   if (path.startswith("\\\\.\\"))
     return true;
 
-  // Then compare against the list of ancient reserved names
+  // Then compare against the list of ancient reserved names.
   for (size_t i = 0; i < array_lengthof(sReservedNames); ++i) {
     if (path.equals_lower(sReservedNames[i]))
       return true;
@@ -404,7 +446,9 @@ static std::error_code getStatus(HANDLE FileHandle, file_status &Result) {
                          ? file_type::directory_file
                          : file_type::regular_file;
     Result =
-        file_status(Type, Info.ftLastWriteTime.dwHighDateTime,
+        file_status(Type, Info.ftLastAccessTime.dwHighDateTime,
+                    Info.ftLastAccessTime.dwLowDateTime,
+                    Info.ftLastWriteTime.dwHighDateTime,
                     Info.ftLastWriteTime.dwLowDateTime,
                     Info.dwVolumeSerialNumber, Info.nFileSizeHigh,
                     Info.nFileSizeLow, Info.nFileIndexHigh, Info.nFileIndexLow);
@@ -663,7 +707,8 @@ std::error_code detail::directory_iterator_increment(detail::DirIterState &it) {
   return std::error_code();
 }
 
-std::error_code openFileForRead(const Twine &Name, int &ResultFD) {
+std::error_code openFileForRead(const Twine &Name, int &ResultFD,
+                                SmallVectorImpl<char> *RealPath) {
   SmallVector<wchar_t, 128> PathUTF16;
 
   if (std::error_code EC = widenPath(Name, PathUTF16))
@@ -692,6 +737,22 @@ std::error_code openFileForRead(const Twine &Name, int &ResultFD) {
     return mapWindowsError(ERROR_INVALID_HANDLE);
   }
 
+  // Fetch the real name of the file, if the user asked
+  if (RealPath) {
+    RealPath->clear();
+    wchar_t RealPathUTF16[MAX_PATH];
+    DWORD CountChars =
+      ::GetFinalPathNameByHandleW(H, RealPathUTF16, MAX_PATH,
+                                  FILE_NAME_NORMALIZED);
+    if (CountChars > 0 && CountChars < MAX_PATH) {
+      // Convert the result from UTF-16 to UTF-8.
+      SmallString<MAX_PATH> RealPathUTF8;
+      if (!UTF16ToUTF8(RealPathUTF16, CountChars, RealPathUTF8))
+        RealPath->append(RealPathUTF8.data(),
+                         RealPathUTF8.data() + strlen(RealPathUTF8.data()));
+    }
+  }
+
   ResultFD = FD;
   return std::error_code();
 }
@@ -752,6 +813,42 @@ std::error_code openFileForWrite(const Twine &Name, int &ResultFD,
   ResultFD = FD;
   return std::error_code();
 }
+
+std::error_code getPathFromOpenFD(int FD, SmallVectorImpl<char> &ResultPath) {
+  HANDLE FileHandle = reinterpret_cast<HANDLE>(::_get_osfhandle(FD));
+  if (FileHandle == INVALID_HANDLE_VALUE)
+    return make_error_code(errc::bad_file_descriptor);
+
+  DWORD CharCount;
+  SmallVector<wchar_t, 1024> TempPath;
+  do {
+    CharCount = ::GetFinalPathNameByHandleW(FileHandle, TempPath.begin(),
+                                            TempPath.capacity(),
+                                            FILE_NAME_NORMALIZED);
+    if (CharCount < TempPath.capacity())
+      break;
+
+    // Reserve sufficient space for the path as well as the null character. Even
+    // though the API does not document that it is required, if we reserve just
+    // CharCount space, the function call will not store the resulting path and
+    // still report success.
+    TempPath.reserve(CharCount + 1);
+  } while (true);
+
+  if (CharCount == 0)
+    return mapWindowsError(::GetLastError());
+
+  TempPath.set_size(CharCount);
+
+  // On earlier Windows releases, the character count includes the terminating
+  // null.
+  if (TempPath.back() == L'\0') {
+    --CharCount;
+    TempPath.pop_back();
+  }
+
+  return windows::UTF16ToUTF8(TempPath.data(), CharCount, ResultPath);
+}
 } // end namespace fs
 
 namespace path {
@@ -886,6 +983,7 @@ std::error_code UTF16ToCurCP(const wchar_t *utf16, size_t utf16_len,
                              llvm::SmallVectorImpl<char> &utf8) {
   return UTF16ToCodePage(CP_ACP, utf16, utf16_len, utf8);
 }
+
 } // end namespace windows
 } // end namespace sys
 } // end namespace llvm