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, 436 insertions, 0 deletions

diff --git a/contrib/llvm/tools/llvm-cov/SourceCoverageViewHTML.cpp b/contrib/llvm/tools/llvm-cov/SourceCoverageViewHTML.cpp
new file mode 100644
index 0000000..81963e5
--- /dev/null
+++ b/contrib/llvm/tools/llvm-cov/SourceCoverageViewHTML.cpp
@@ -0,0 +1,436 @@
+//===- SourceCoverageViewHTML.cpp - A html code coverage view -------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file This file implements the html coverage renderer.
+///
+//===----------------------------------------------------------------------===//
+
+#include "SourceCoverageViewHTML.h"
+#include "llvm/ADT/Optional.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/Support/Path.h"
+
+using namespace llvm;
+
+namespace {
+
+const char *BeginHeader =
+  "<head>"
+    "<meta name='viewport' content='width=device-width,initial-scale=1'>"
+    "<meta charset='UTF-8'>";
+
+const char *CSSForCoverage =
+  "<style>"
+R"(
+
+.red {
+  background-color: #FFD0D0;
+}
+.cyan {
+  background-color: cyan;
+}
+.black {
+  background-color: black;
+  color: white;
+}
+.green {
+  background-color: #98FFA6;
+  color: white;
+}
+.magenta {
+  background-color: #F998FF;
+  color: white;
+}
+body {
+  font-family: -apple-system, sans-serif;
+}
+pre {
+  margin-top: 0px !important;
+  margin-bottom: 0px !important;
+}
+.source-name-title {
+  padding: 5px 10px;
+  border-bottom: 1px solid #dbdbdb;
+  background-color: #eee;
+}
+.centered {
+  display: table;
+  margin-left: auto;
+  margin-right: auto;
+  border: 1px solid #dbdbdb;
+  border-radius: 3px;
+}
+.expansion-view {
+  background-color: rgba(0, 0, 0, 0);
+  margin-left: 0px;
+  margin-top: 5px;
+  margin-right: 5px;
+  margin-bottom: 5px;
+  border: 1px solid #dbdbdb;
+  border-radius: 3px;
+}
+table {
+  border-collapse: collapse;
+}
+.line-number {
+  text-align: right;
+  color: #aaa;
+}
+.covered-line {
+  text-align: right;
+  color: #0080ff;
+}
+.uncovered-line {
+  text-align: right;
+  color: #ff3300;
+}
+.tooltip {
+  position: relative;
+  display: inline;
+  background-color: #b3e6ff;
+  text-decoration: none;
+}
+.tooltip span.tooltip-content {
+  position: absolute;
+  width: 100px;
+  margin-left: -50px;
+  color: #FFFFFF;
+  background: #000000;
+  height: 30px;
+  line-height: 30px;
+  text-align: center;
+  visibility: hidden;
+  border-radius: 6px;
+}
+.tooltip span.tooltip-content:after {
+  content: '';
+  position: absolute;
+  top: 100%;
+  left: 50%;
+  margin-left: -8px;
+  width: 0; height: 0;
+  border-top: 8px solid #000000;
+  border-right: 8px solid transparent;
+  border-left: 8px solid transparent;
+}
+:hover.tooltip span.tooltip-content {
+  visibility: visible;
+  opacity: 0.8;
+  bottom: 30px;
+  left: 50%;
+  z-index: 999;
+}
+th, td {
+  vertical-align: top;
+  padding: 2px 5px;
+  border-collapse: collapse;
+  border-right: solid 1px #eee;
+  border-left: solid 1px #eee;
+}
+td:first-child {
+  border-left: none;
+}
+td:last-child {
+  border-right: none;
+}
+
+)"
+  "</style>";
+
+const char *EndHeader = "</head>";
+
+const char *BeginCenteredDiv = "<div class='centered'>";
+
+const char *EndCenteredDiv = "</div>";
+
+const char *BeginSourceNameDiv = "<div class='source-name-title'>";
+
+const char *EndSourceNameDiv = "</div>";
+
+const char *BeginCodeTD = "<td class='code'>";
+
+const char *EndCodeTD = "</td>";
+
+const char *BeginPre = "<pre>";
+
+const char *EndPre = "</pre>";
+
+const char *BeginExpansionDiv = "<div class='expansion-view'>";
+
+const char *EndExpansionDiv = "</div>";
+
+const char *BeginTable = "<table>";
+
+const char *EndTable = "</table>";
+
+void emitPrelude(raw_ostream &OS) {
+  OS << "<!doctype html>"
+        "<html>"
+     << BeginHeader << CSSForCoverage << EndHeader << "<body>"
+     << BeginCenteredDiv;
+}
+
+void emitEpilog(raw_ostream &OS) {
+  OS << EndCenteredDiv << "</body>"
+                          "</html>";
+}
+
+// Return a string with the special characters in \p Str escaped.
+std::string escape(StringRef Str) {
+  std::string Result;
+  for (char C : Str) {
+    if (C == '&')
+      Result += "&amp;";
+    else if (C == '<')
+      Result += "&lt;";
+    else if (C == '>')
+      Result += "&gt;";
+    else if (C == '\"')
+      Result += "&quot;";
+    else
+      Result += C;
+  }
+  return Result;
+}
+
+// Create a \p Name tag around \p Str, and optionally set its \p ClassName.
+std::string tag(const std::string &Name, const std::string &Str,
+                const std::string &ClassName = "") {
+  std::string Tag = "<" + Name;
+  if (ClassName != "")
+    Tag += " class='" + ClassName + "'";
+  return Tag + ">" + Str + "</" + Name + ">";
+}
+
+// Create an anchor to \p Link with the label \p Str.
+std::string a(const std::string &Link, const std::string &Str) {
+  return "<a href='" + Link + "'>" + Str + "</a>";
+}
+
+} // anonymous namespace
+
+Expected<CoveragePrinter::OwnedStream>
+CoveragePrinterHTML::createViewFile(StringRef Path, bool InToplevel) {
+  auto OSOrErr = createOutputStream(Path, "html", InToplevel);
+  if (!OSOrErr)
+    return OSOrErr;
+
+  OwnedStream OS = std::move(OSOrErr.get());
+  emitPrelude(*OS.get());
+  return std::move(OS);
+}
+
+void CoveragePrinterHTML::closeViewFile(OwnedStream OS) {
+  emitEpilog(*OS.get());
+}
+
+Error CoveragePrinterHTML::createIndexFile(ArrayRef<StringRef> SourceFiles) {
+  auto OSOrErr = createOutputStream("index", "html", /*InToplevel=*/true);
+  if (Error E = OSOrErr.takeError())
+    return E;
+  auto OS = std::move(OSOrErr.get());
+  raw_ostream &OSRef = *OS.get();
+
+  // Emit a table containing links to reports for each file in the covmapping.
+  emitPrelude(OSRef);
+  OSRef << BeginSourceNameDiv << "Index" << EndSourceNameDiv;
+  OSRef << BeginTable;
+  for (StringRef SF : SourceFiles) {
+    std::string LinkText = escape(sys::path::relative_path(SF));
+    std::string LinkTarget =
+        escape(getOutputPath(SF, "html", /*InToplevel=*/false));
+    OSRef << tag("tr", tag("td", tag("pre", a(LinkTarget, LinkText), "code")));
+  }
+  OSRef << EndTable;
+  emitEpilog(OSRef);
+
+  return Error::success();
+}
+
+void SourceCoverageViewHTML::renderViewHeader(raw_ostream &OS) {
+  OS << BeginTable;
+}
+
+void SourceCoverageViewHTML::renderViewFooter(raw_ostream &OS) {
+  OS << EndTable;
+}
+
+void SourceCoverageViewHTML::renderSourceName(raw_ostream &OS) {
+  OS << BeginSourceNameDiv << tag("pre", escape(getSourceName()))
+     << EndSourceNameDiv;
+}
+
+void SourceCoverageViewHTML::renderLinePrefix(raw_ostream &OS, unsigned) {
+  OS << "<tr>";
+}
+
+void SourceCoverageViewHTML::renderLineSuffix(raw_ostream &OS, unsigned) {
+  // If this view has sub-views, renderLine() cannot close the view's cell.
+  // Take care of it here, after all sub-views have been rendered.
+  if (hasSubViews())
+    OS << EndCodeTD;
+  OS << "</tr>";
+}
+
+void SourceCoverageViewHTML::renderViewDivider(raw_ostream &, unsigned) {
+  // The table-based output makes view dividers unnecessary.
+}
+
+void SourceCoverageViewHTML::renderLine(
+    raw_ostream &OS, LineRef L, const coverage::CoverageSegment *WrappedSegment,
+    CoverageSegmentArray Segments, unsigned ExpansionCol, unsigned) {
+  StringRef Line = L.Line;
+
+  // Steps for handling text-escaping, highlighting, and tooltip creation:
+  //
+  // 1. Split the line into N+1 snippets, where N = |Segments|. The first
+  //    snippet starts from Col=1 and ends at the start of the first segment.
+  //    The last snippet starts at the last mapped column in the line and ends
+  //    at the end of the line. Both are required but may be empty.
+
+  SmallVector<std::string, 8> Snippets;
+
+  unsigned LCol = 1;
+  auto Snip = [&](unsigned Start, unsigned Len) {
+    assert(Start + Len <= Line.size() && "Snippet extends past the EOL");
+    Snippets.push_back(Line.substr(Start, Len));
+    LCol += Len;
+  };
+
+  Snip(LCol - 1, Segments.empty() ? 0 : (Segments.front()->Col - 1));
+
+  for (unsigned I = 1, E = Segments.size(); I < E; ++I) {
+    assert(LCol == Segments[I - 1]->Col && "Snippet start position is wrong");
+    Snip(LCol - 1, Segments[I]->Col - LCol);
+  }
+
+  // |Line| + 1 is needed to avoid underflow when, e.g |Line| = 0 and LCol = 1.
+  Snip(LCol - 1, Line.size() + 1 - LCol);
+  assert(LCol == Line.size() + 1 && "Final snippet doesn't reach the EOL");
+
+  // 2. Escape all of the snippets.
+
+  for (unsigned I = 0, E = Snippets.size(); I < E; ++I)
+    Snippets[I] = escape(Snippets[I]);
+
+  // 3. Use \p WrappedSegment to set the highlight for snippets 0 and 1. Use
+  //    segment 1 to set the highlight for snippet 2, segment 2 to set the
+  //    highlight for snippet 3, and so on.
+
+  Optional<std::string> Color;
+  auto Highlight = [&](const std::string &Snippet) {
+    return tag("span", Snippet, Color.getValue());
+  };
+
+  auto CheckIfUncovered = [](const coverage::CoverageSegment *S) {
+    return S && S->HasCount && S->Count == 0;
+  };
+
+  if (CheckIfUncovered(WrappedSegment) ||
+      CheckIfUncovered(Segments.empty() ? nullptr : Segments.front())) {
+    Color = "red";
+    Snippets[0] = Highlight(Snippets[0]);
+    Snippets[1] = Highlight(Snippets[1]);
+  }
+
+  for (unsigned I = 1, E = Segments.size(); I < E; ++I) {
+    const auto *CurSeg = Segments[I];
+    if (CurSeg->Col == ExpansionCol)
+      Color = "cyan";
+    else if (CheckIfUncovered(CurSeg))
+      Color = "red";
+    else
+      Color = None;
+
+    if (Color.hasValue())
+      Snippets[I + 1] = Highlight(Snippets[I + 1]);
+  }
+
+  // 4. Snippets[1:N+1] correspond to \p Segments[0:N]: use these to generate
+  //    sub-line region count tooltips if needed.
+
+  bool HasMultipleRegions = [&] {
+    unsigned RegionCount = 0;
+    for (const auto *S : Segments)
+      if (S->HasCount && S->IsRegionEntry)
+        if (++RegionCount > 1)
+          return true;
+    return false;
+  }();
+
+  if (shouldRenderRegionMarkers(HasMultipleRegions)) {
+    for (unsigned I = 0, E = Segments.size(); I < E; ++I) {
+      const auto *CurSeg = Segments[I];
+      if (!CurSeg->IsRegionEntry || !CurSeg->HasCount)
+        continue;
+
+      Snippets[I + 1] =
+          tag("div", Snippets[I + 1] + tag("span", formatCount(CurSeg->Count),
+                                          "tooltip-content"),
+              "tooltip");
+    }
+  }
+
+  OS << BeginCodeTD;
+  OS << BeginPre;
+  for (const auto &Snippet : Snippets)
+    OS << Snippet;
+  OS << EndPre;
+
+  // If there are no sub-views left to attach to this cell, end the cell.
+  // Otherwise, end it after the sub-views are rendered (renderLineSuffix()).
+  if (!hasSubViews())
+    OS << EndCodeTD;
+}
+
+void SourceCoverageViewHTML::renderLineCoverageColumn(
+    raw_ostream &OS, const LineCoverageStats &Line) {
+  std::string Count = "";
+  if (Line.isMapped())
+    Count = tag("pre", formatCount(Line.ExecutionCount));
+  std::string CoverageClass =
+      (Line.ExecutionCount > 0) ? "covered-line" : "uncovered-line";
+  OS << tag("td", Count, CoverageClass);
+}
+
+void SourceCoverageViewHTML::renderLineNumberColumn(raw_ostream &OS,
+                                                    unsigned LineNo) {
+  OS << tag("td", tag("pre", utostr(uint64_t(LineNo))), "line-number");
+}
+
+void SourceCoverageViewHTML::renderRegionMarkers(raw_ostream &,
+                                                 CoverageSegmentArray,
+                                                 unsigned) {
+  // Region markers are rendered in-line using tooltips.
+}
+
+void SourceCoverageViewHTML::renderExpansionSite(
+    raw_ostream &OS, LineRef L, const coverage::CoverageSegment *WrappedSegment,
+    CoverageSegmentArray Segments, unsigned ExpansionCol, unsigned ViewDepth) {
+  // Render the line containing the expansion site. No extra formatting needed.
+  renderLine(OS, L, WrappedSegment, Segments, ExpansionCol, ViewDepth);
+}
+
+void SourceCoverageViewHTML::renderExpansionView(raw_ostream &OS,
+                                                 ExpansionView &ESV,
+                                                 unsigned ViewDepth) {
+  OS << BeginExpansionDiv;
+  ESV.View->print(OS, /*WholeFile=*/false, /*ShowSourceName=*/false,
+                  ViewDepth + 1);
+  OS << EndExpansionDiv;
+}
+
+void SourceCoverageViewHTML::renderInstantiationView(raw_ostream &OS,
+                                                     InstantiationView &ISV,
+                                                     unsigned ViewDepth) {
+  OS << BeginExpansionDiv;
+  ISV.View->print(OS, /*WholeFile=*/false, /*ShowSourceName=*/true, ViewDepth);
+  OS << EndExpansionDiv;
+}