MFC 261991:

Upgrade our copy of llvm/clang to 3.4 release.  This version supports
all of the features in the current working draft of the upcoming C++
standard, provisionally named C++1y.

The code generator's performance is greatly increased, and the loop
auto-vectorizer is now enabled at -Os and -O2 in addition to -O3.  The
PowerPC backend has made several major improvements to code generation
quality and compile time, and the X86, SPARC, ARM32, Aarch64 and SystemZ
backends have all seen major feature work.

Release notes for llvm and clang can be found here:
<http://llvm.org/releases/3.4/docs/ReleaseNotes.html>
<http://llvm.org/releases/3.4/tools/clang/docs/ReleaseNotes.html>

MFC 262121 (by emaste):

Update lldb for clang/llvm 3.4 import

This commit largely restores the lldb source to the upstream r196259
snapshot with the addition of threaded inferior support and a few bug
fixes.

Specific upstream lldb revisions restored include:
   SVN      git
  181387  779e6ac
  181703  7bef4e2
  182099  b31044e
  182650  f2dcf35
  182683  0d91b80
  183862  15c1774
  183929  99447a6
  184177  0b2934b
  184948  4dc3761
  184954  007e7bc
  186990  eebd175

Sponsored by:	DARPA, AFRL

MFC 262186 (by emaste):

Fix mismerge in r262121

A break statement was lost in the merge.  The error had no functional
impact, but restore it to reduce the diff against upstream.

MFC 262303:

Pull in r197521 from upstream clang trunk (by rdivacky):

  Use the integrated assembler by default on FreeBSD/ppc and ppc64.

Requested by:	jhibbits

MFC 262611:

Pull in r196874 from upstream llvm trunk:

  Fix a crash that occurs when PWD is invalid.

  MCJIT needs to be able to run in hostile environments, even when PWD
  is invalid. There's no need to crash MCJIT in this case.

  The obvious fix is to simply leave MCContext's CompilationDir empty
  when PWD can't be determined. This way, MCJIT clients,
  and other clients that link with LLVM don't need a valid working directory.

  If we do want to guarantee valid CompilationDir, that should be done
  only for clients of getCompilationDir(). This is as simple as checking
  for an empty string.

  The only current use of getCompilationDir is EmitGenDwarfInfo, which
  won't conceivably run with an invalid working dir. However, in the
  purely hypothetically and untestable case that this happens, the
  AT_comp_dir will be omitted from the compilation_unit DIE.

This should help fix assertions occurring with ports-mgmt/tinderbox,
when it is using jails, and sometimes invalidates clang's current
working directory.

Reported by:	decke

MFC 262809:

Pull in r203007 from upstream clang trunk:

  Don't produce an alias between destructors with different calling conventions.

  Fixes pr19007.

(Please note that is an LLVM PR identifier, not a FreeBSD one.)

This should fix Firefox and/or libxul crashes (due to problems with
regparm/stdcall calling conventions) on i386.

Reported by:	multiple users on freebsd-current
PR:		bin/187103

MFC 263048:

Repair recognition of "CC" as an alias for the C++ compiler, since it
was silently broken by upstream for a Windows-specific use-case.

Apparently some versions of CMake still rely on this archaic feature...

Reported by:	rakuco

MFC 263049:

Garbage collect the old way of adding the libstdc++ include directories
in clang's InitHeaderSearch.cpp.  This has been superseded by David
Chisnall's commit in r255321.

Moreover, if libc++ is used, the libstdc++ include directories should
not be in the search path at all.  These directories are now only used
if you pass -stdlib=libstdc++.

1 files changed, 168 insertions, 0 deletions

diff --git a/contrib/llvm/lib/DebugInfo/DWARFUnit.h b/contrib/llvm/lib/DebugInfo/DWARFUnit.h
new file mode 100644
index 0000000..bd768a6
--- /dev/null
+++ b/contrib/llvm/lib/DebugInfo/DWARFUnit.h
@@ -0,0 +1,168 @@
+//===-- DWARFUnit.h ---------------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_DEBUGINFO_DWARFUNIT_H
+#define LLVM_DEBUGINFO_DWARFUNIT_H
+
+#include "llvm/ADT/OwningPtr.h"
+#include "DWARFDebugAbbrev.h"
+#include "DWARFDebugInfoEntry.h"
+#include "DWARFDebugRangeList.h"
+#include "DWARFRelocMap.h"
+#include <vector>
+
+namespace llvm {
+
+namespace object {
+class ObjectFile;
+}
+
+class DWARFDebugAbbrev;
+class StringRef;
+class raw_ostream;
+
+class DWARFUnit {
+  const DWARFDebugAbbrev *Abbrev;
+  StringRef InfoSection;
+  StringRef AbbrevSection;
+  StringRef RangeSection;
+  uint32_t RangeSectionBase;
+  StringRef StringSection;
+  StringRef StringOffsetSection;
+  StringRef AddrOffsetSection;
+  uint32_t AddrOffsetSectionBase;
+  const RelocAddrMap *RelocMap;
+  bool isLittleEndian;
+
+  uint32_t Offset;
+  uint32_t Length;
+  uint16_t Version;
+  const DWARFAbbreviationDeclarationSet *Abbrevs;
+  uint8_t AddrSize;
+  uint64_t BaseAddr;
+  // The compile unit debug information entry items.
+  std::vector<DWARFDebugInfoEntryMinimal> DieArray;
+
+  class DWOHolder {
+    OwningPtr<object::ObjectFile> DWOFile;
+    OwningPtr<DWARFContext> DWOContext;
+    DWARFUnit *DWOU;
+  public:
+    DWOHolder(object::ObjectFile *DWOFile);
+    DWARFUnit *getUnit() const { return DWOU; }
+  };
+  OwningPtr<DWOHolder> DWO;
+
+protected:
+  virtual bool extractImpl(DataExtractor debug_info, uint32_t *offset_ptr);
+
+public:
+
+  DWARFUnit(const DWARFDebugAbbrev *DA, StringRef IS, StringRef AS,
+            StringRef RS, StringRef SS, StringRef SOS, StringRef AOS,
+            const RelocAddrMap *M, bool LE);
+
+  virtual ~DWARFUnit();
+
+  StringRef getStringSection() const { return StringSection; }
+  StringRef getStringOffsetSection() const { return StringOffsetSection; }
+  void setAddrOffsetSection(StringRef AOS, uint32_t Base) {
+    AddrOffsetSection = AOS;
+    AddrOffsetSectionBase = Base;
+  }
+  void setRangesSection(StringRef RS, uint32_t Base) {
+    RangeSection = RS;
+    RangeSectionBase = Base;
+  }
+
+  bool getAddrOffsetSectionItem(uint32_t Index, uint64_t &Result) const;
+  // FIXME: Result should be uint64_t in DWARF64.
+  bool getStringOffsetSectionItem(uint32_t Index, uint32_t &Result) const;
+
+  DataExtractor getDebugInfoExtractor() const {
+    return DataExtractor(InfoSection, isLittleEndian, AddrSize);
+  }
+  DataExtractor getStringExtractor() const {
+    return DataExtractor(StringSection, false, 0);
+  }
+
+  const RelocAddrMap *getRelocMap() const { return RelocMap; }
+
+  bool extract(DataExtractor debug_info, uint32_t* offset_ptr);
+
+  /// extractRangeList - extracts the range list referenced by this compile
+  /// unit from .debug_ranges section. Returns true on success.
+  /// Requires that compile unit is already extracted.
+  bool extractRangeList(uint32_t RangeListOffset,
+                        DWARFDebugRangeList &RangeList) const;
+  void clear();
+  uint32_t getOffset() const { return Offset; }
+  /// Size in bytes of the compile unit header.
+  virtual uint32_t getSize() const { return 11; }
+  uint32_t getFirstDIEOffset() const { return Offset + getSize(); }
+  uint32_t getNextUnitOffset() const { return Offset + Length + 4; }
+  /// Size in bytes of the .debug_info data associated with this compile unit.
+  size_t getDebugInfoSize() const { return Length + 4 - getSize(); }
+  uint32_t getLength() const { return Length; }
+  uint16_t getVersion() const { return Version; }
+  const DWARFAbbreviationDeclarationSet *getAbbreviations() const {
+    return Abbrevs;
+  }
+  uint8_t getAddressByteSize() const { return AddrSize; }
+  uint64_t getBaseAddress() const { return BaseAddr; }
+
+  void setBaseAddress(uint64_t base_addr) {
+    BaseAddr = base_addr;
+  }
+
+  const DWARFDebugInfoEntryMinimal *
+  getCompileUnitDIE(bool extract_cu_die_only = true) {
+    extractDIEsIfNeeded(extract_cu_die_only);
+    return DieArray.empty() ? NULL : &DieArray[0];
+  }
+
+  const char *getCompilationDir();
+  uint64_t getDWOId();
+
+  void buildAddressRangeTable(DWARFDebugAranges *debug_aranges,
+                              bool clear_dies_if_already_not_parsed,
+                              uint32_t CUOffsetInAranges);
+
+  /// getInlinedChainForAddress - fetches inlined chain for a given address.
+  /// Returns empty chain if there is no subprogram containing address. The
+  /// chain is valid as long as parsed compile unit DIEs are not cleared.
+  DWARFDebugInfoEntryInlinedChain getInlinedChainForAddress(uint64_t Address);
+
+private:
+  /// extractDIEsIfNeeded - Parses a compile unit and indexes its DIEs if it
+  /// hasn't already been done. Returns the number of DIEs parsed at this call.
+  size_t extractDIEsIfNeeded(bool CUDieOnly);
+  /// extractDIEsToVector - Appends all parsed DIEs to a vector.
+  void extractDIEsToVector(bool AppendCUDie, bool AppendNonCUDIEs,
+                           std::vector<DWARFDebugInfoEntryMinimal> &DIEs) const;
+  /// setDIERelations - We read in all of the DIE entries into our flat list
+  /// of DIE entries and now we need to go back through all of them and set the
+  /// parent, sibling and child pointers for quick DIE navigation.
+  void setDIERelations();
+  /// clearDIEs - Clear parsed DIEs to keep memory usage low.
+  void clearDIEs(bool KeepCUDie);
+
+  /// parseDWO - Parses .dwo file for current compile unit. Returns true if
+  /// it was actually constructed.
+  bool parseDWO();
+
+  /// getSubprogramForAddress - Returns subprogram DIE with address range
+  /// encompassing the provided address. The pointer is alive as long as parsed
+  /// compile unit DIEs are not cleared.
+  const DWARFDebugInfoEntryMinimal *getSubprogramForAddress(uint64_t Address);
+};
+
+}
+
+#endif