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, 44 insertions, 46 deletions

diff --git a/contrib/llvm/lib/DebugInfo/DWARFDebugInfoEntry.h b/contrib/llvm/lib/DebugInfo/DWARFDebugInfoEntry.h
index 9003591..aa61056 100644
--- a/contrib/llvm/lib/DebugInfo/DWARFDebugInfoEntry.h
+++ b/contrib/llvm/lib/DebugInfo/DWARFDebugInfoEntry.h
@@ -18,9 +18,10 @@ namespace llvm {
 
 class DWARFDebugAranges;
 class DWARFCompileUnit;
+class DWARFUnit;
 class DWARFContext;
 class DWARFFormValue;
-class DWARFInlinedSubroutineChain;
+struct DWARFDebugInfoEntryInlinedChain;
 
 /// DWARFDebugInfoEntryMinimal - A DIE with only the minimum required data.
 class DWARFDebugInfoEntryMinimal {
@@ -39,23 +40,15 @@ public:
   DWARFDebugInfoEntryMinimal()
     : Offset(0), ParentIdx(0), SiblingIdx(0), AbbrevDecl(0) {}
 
-  void dump(raw_ostream &OS, const DWARFCompileUnit *cu,
-            unsigned recurseDepth, unsigned indent = 0) const;
-  void dumpAttribute(raw_ostream &OS, const DWARFCompileUnit *cu,
-                     uint32_t *offset_ptr, uint16_t attr, uint16_t form,
-                     unsigned indent = 0) const;
+  void dump(raw_ostream &OS, const DWARFUnit *u, unsigned recurseDepth,
+            unsigned indent = 0) const;
+  void dumpAttribute(raw_ostream &OS, const DWARFUnit *u, uint32_t *offset_ptr,
+                     uint16_t attr, uint16_t form, unsigned indent = 0) const;
 
-  /// Extracts a debug info entry, which is a child of a given compile unit,
+  /// Extracts a debug info entry, which is a child of a given unit,
   /// starting at a given offset. If DIE can't be extracted, returns false and
   /// doesn't change OffsetPtr.
-  bool extractFast(const DWARFCompileUnit *CU, const uint8_t *FixedFormSizes,
-                   uint32_t *OffsetPtr);
-
-  /// Extract a debug info entry for a given compile unit from the
-  /// .debug_info and .debug_abbrev data starting at the given offset.
-  /// If compile unit can't be parsed, returns false and doesn't change
-  /// OffsetPtr.
-  bool extract(const DWARFCompileUnit *CU, uint32_t *OffsetPtr);
+  bool extractFast(const DWARFUnit *U, uint32_t *OffsetPtr);
 
   uint32_t getTag() const { return AbbrevDecl ? AbbrevDecl->getTag() : 0; }
   bool isNULL() const { return AbbrevDecl == 0; }
@@ -120,60 +113,65 @@ public:
     return AbbrevDecl;
   }
 
-  uint32_t getAttributeValue(const DWARFCompileUnit *cu,
-                             const uint16_t attr, DWARFFormValue &formValue,
-                             uint32_t *end_attr_offset_ptr = 0) const;
+  bool getAttributeValue(const DWARFUnit *U, const uint16_t Attr,
+                         DWARFFormValue &FormValue) const;
+
+  const char *getAttributeValueAsString(const DWARFUnit *U, const uint16_t Attr,
+                                        const char *FailValue) const;
 
-  const char* getAttributeValueAsString(const DWARFCompileUnit* cu,
-                                        const uint16_t attr,
-                                        const char *fail_value) const;
+  uint64_t getAttributeValueAsAddress(const DWARFUnit *U, const uint16_t Attr,
+                                      uint64_t FailValue) const;
 
-  uint64_t getAttributeValueAsUnsigned(const DWARFCompileUnit *cu,
-                                       const uint16_t attr,
-                                       uint64_t fail_value) const;
+  uint64_t getAttributeValueAsUnsignedConstant(const DWARFUnit *U,
+                                               const uint16_t Attr,
+                                               uint64_t FailValue) const;
 
-  uint64_t getAttributeValueAsReference(const DWARFCompileUnit *cu,
-                                        const uint16_t attr,
-                                        uint64_t fail_value) const;
+  uint64_t getAttributeValueAsReference(const DWARFUnit *U, const uint16_t Attr,
+                                        uint64_t FailValue) const;
 
-  int64_t getAttributeValueAsSigned(const DWARFCompileUnit* cu,
-                                    const uint16_t attr,
-                                    int64_t fail_value) const;
+  uint64_t getAttributeValueAsSectionOffset(const DWARFUnit *U,
+                                            const uint16_t Attr,
+                                            uint64_t FailValue) const;
 
   /// Retrieves DW_AT_low_pc and DW_AT_high_pc from CU.
   /// Returns true if both attributes are present.
-  bool getLowAndHighPC(const DWARFCompileUnit *CU,
-                       uint64_t &LowPC, uint64_t &HighPC) const;
+  bool getLowAndHighPC(const DWARFUnit *U, uint64_t &LowPC,
+                       uint64_t &HighPC) const;
 
-  void buildAddressRangeTable(const DWARFCompileUnit *CU,
-                              DWARFDebugAranges *DebugAranges) const;
+  void buildAddressRangeTable(const DWARFUnit *U,
+                              DWARFDebugAranges *DebugAranges,
+                              uint32_t CUOffsetInAranges) const;
 
-  bool addressRangeContainsAddress(const DWARFCompileUnit *CU,
+  bool addressRangeContainsAddress(const DWARFUnit *U,
                                    const uint64_t Address) const;
 
   /// If a DIE represents a subprogram (or inlined subroutine),
   /// returns its mangled name (or short name, if mangled is missing).
   /// This name may be fetched from specification or abstract origin
   /// for this subprogram. Returns null if no name is found.
-  const char* getSubroutineName(const DWARFCompileUnit *CU) const;
+  const char *getSubroutineName(const DWARFUnit *U) const;
 
   /// Retrieves values of DW_AT_call_file, DW_AT_call_line and
   /// DW_AT_call_column from DIE (or zeroes if they are missing).
-  void getCallerFrame(const DWARFCompileUnit *CU, uint32_t &CallFile,
+  void getCallerFrame(const DWARFUnit *U, uint32_t &CallFile,
                       uint32_t &CallLine, uint32_t &CallColumn) const;
 
-  /// InlinedChain - represents a chain of inlined_subroutine
-  /// DIEs, (possibly ending with subprogram DIE), all of which are contained
-  /// in some concrete inlined instance tree. Address range for each DIE
-  /// (except the last DIE) in this chain is contained in address
-  /// range for next DIE in the chain.
-  typedef SmallVector<DWARFDebugInfoEntryMinimal, 4> InlinedChain;
-
   /// Get inlined chain for a given address, rooted at the current DIE.
   /// Returns empty chain if address is not contained in address range
   /// of current DIE.
-  InlinedChain getInlinedChainForAddress(const DWARFCompileUnit *CU,
-                                         const uint64_t Address) const;
+  DWARFDebugInfoEntryInlinedChain
+  getInlinedChainForAddress(const DWARFUnit *U, const uint64_t Address) const;
+};
+
+/// DWARFDebugInfoEntryInlinedChain - represents a chain of inlined_subroutine
+/// DIEs, (possibly ending with subprogram DIE), all of which are contained
+/// in some concrete inlined instance tree. Address range for each DIE
+/// (except the last DIE) in this chain is contained in address
+/// range for next DIE in the chain.
+struct DWARFDebugInfoEntryInlinedChain {
+  DWARFDebugInfoEntryInlinedChain() : U(0) {}
+  SmallVector<DWARFDebugInfoEntryMinimal, 4> DIEs;
+  const DWARFUnit *U;
 };
 
 }