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, 85 insertions, 29 deletions

diff --git a/contrib/llvm/lib/Target/SystemZ/MCTargetDesc/SystemZMCCodeEmitter.cpp b/contrib/llvm/lib/Target/SystemZ/MCTargetDesc/SystemZMCCodeEmitter.cpp
index ea2250f..f07ea7b 100644
--- a/contrib/llvm/lib/Target/SystemZ/MCTargetDesc/SystemZMCCodeEmitter.cpp
+++ b/contrib/llvm/lib/Target/SystemZ/MCTargetDesc/SystemZMCCodeEmitter.cpp
@@ -45,33 +45,40 @@ private:
 
   // Called by the TableGen code to get the binary encoding of operand
   // MO in MI.  Fixups is the list of fixups against MI.
-  unsigned getMachineOpValue(const MCInst &MI, const MCOperand &MO,
+  uint64_t getMachineOpValue(const MCInst &MI, const MCOperand &MO,
                              SmallVectorImpl<MCFixup> &Fixups) const;
 
+  // Called by the TableGen code to get the binary encoding of an address.
+  // The index or length, if any, is encoded first, followed by the base,
+  // followed by the displacement.  In a 20-bit displacement,
+  // the low 12 bits are encoded before the high 8 bits.
+  uint64_t getBDAddr12Encoding(const MCInst &MI, unsigned OpNum,
+                               SmallVectorImpl<MCFixup> &Fixups) const;
+  uint64_t getBDAddr20Encoding(const MCInst &MI, unsigned OpNum,
+                               SmallVectorImpl<MCFixup> &Fixups) const;
+  uint64_t getBDXAddr12Encoding(const MCInst &MI, unsigned OpNum,
+                                SmallVectorImpl<MCFixup> &Fixups) const;
+  uint64_t getBDXAddr20Encoding(const MCInst &MI, unsigned OpNum,
+                                SmallVectorImpl<MCFixup> &Fixups) const;
+  uint64_t getBDLAddr12Len8Encoding(const MCInst &MI, unsigned OpNum,
+                                    SmallVectorImpl<MCFixup> &Fixups) const;
+
   // Operand OpNum of MI needs a PC-relative fixup of kind Kind at
   // Offset bytes from the start of MI.  Add the fixup to Fixups
   // and return the in-place addend, which since we're a RELA target
   // is always 0.
-  unsigned getPCRelEncoding(const MCInst &MI, unsigned int OpNum,
+  uint64_t getPCRelEncoding(const MCInst &MI, unsigned OpNum,
                             SmallVectorImpl<MCFixup> &Fixups,
                             unsigned Kind, int64_t Offset) const;
 
-  unsigned getPC16DBLEncoding(const MCInst &MI, unsigned int OpNum,
+  uint64_t getPC16DBLEncoding(const MCInst &MI, unsigned OpNum,
                               SmallVectorImpl<MCFixup> &Fixups) const {
     return getPCRelEncoding(MI, OpNum, Fixups, SystemZ::FK_390_PC16DBL, 2);
   }
-  unsigned getPC32DBLEncoding(const MCInst &MI, unsigned int OpNum,
+  uint64_t getPC32DBLEncoding(const MCInst &MI, unsigned OpNum,
                               SmallVectorImpl<MCFixup> &Fixups) const {
     return getPCRelEncoding(MI, OpNum, Fixups, SystemZ::FK_390_PC32DBL, 2);
   }
-  unsigned getPLT16DBLEncoding(const MCInst &MI, unsigned int OpNum,
-                               SmallVectorImpl<MCFixup> &Fixups) const {
-    return getPCRelEncoding(MI, OpNum, Fixups, SystemZ::FK_390_PLT16DBL, 2);
-  }
-  unsigned getPLT32DBLEncoding(const MCInst &MI, unsigned int OpNum,
-                               SmallVectorImpl<MCFixup> &Fixups) const {
-    return getPCRelEncoding(MI, OpNum, Fixups, SystemZ::FK_390_PLT32DBL, 2);
-  }
 };
 }
 
@@ -95,34 +102,83 @@ EncodeInstruction(const MCInst &MI, raw_ostream &OS,
   }
 }
 
-unsigned SystemZMCCodeEmitter::
+uint64_t SystemZMCCodeEmitter::
 getMachineOpValue(const MCInst &MI, const MCOperand &MO,
                   SmallVectorImpl<MCFixup> &Fixups) const {
   if (MO.isReg())
-    return Ctx.getRegisterInfo().getEncodingValue(MO.getReg());
+    return Ctx.getRegisterInfo()->getEncodingValue(MO.getReg());
   if (MO.isImm())
-    return static_cast<unsigned>(MO.getImm());
+    return static_cast<uint64_t>(MO.getImm());
   llvm_unreachable("Unexpected operand type!");
 }
 
-unsigned
-SystemZMCCodeEmitter::getPCRelEncoding(const MCInst &MI, unsigned int OpNum,
+uint64_t SystemZMCCodeEmitter::
+getBDAddr12Encoding(const MCInst &MI, unsigned OpNum,
+                    SmallVectorImpl<MCFixup> &Fixups) const {
+  uint64_t Base = getMachineOpValue(MI, MI.getOperand(OpNum), Fixups);
+  uint64_t Disp = getMachineOpValue(MI, MI.getOperand(OpNum + 1), Fixups);
+  assert(isUInt<4>(Base) && isUInt<12>(Disp));
+  return (Base << 12) | Disp;
+}
+
+uint64_t SystemZMCCodeEmitter::
+getBDAddr20Encoding(const MCInst &MI, unsigned OpNum,
+                    SmallVectorImpl<MCFixup> &Fixups) const {
+  uint64_t Base = getMachineOpValue(MI, MI.getOperand(OpNum), Fixups);
+  uint64_t Disp = getMachineOpValue(MI, MI.getOperand(OpNum + 1), Fixups);
+  assert(isUInt<4>(Base) && isInt<20>(Disp));
+  return (Base << 20) | ((Disp & 0xfff) << 8) | ((Disp & 0xff000) >> 12);
+}
+
+uint64_t SystemZMCCodeEmitter::
+getBDXAddr12Encoding(const MCInst &MI, unsigned OpNum,
+                     SmallVectorImpl<MCFixup> &Fixups) const {
+  uint64_t Base = getMachineOpValue(MI, MI.getOperand(OpNum), Fixups);
+  uint64_t Disp = getMachineOpValue(MI, MI.getOperand(OpNum + 1), Fixups);
+  uint64_t Index = getMachineOpValue(MI, MI.getOperand(OpNum + 2), Fixups);
+  assert(isUInt<4>(Base) && isUInt<12>(Disp) && isUInt<4>(Index));
+  return (Index << 16) | (Base << 12) | Disp;
+}
+
+uint64_t SystemZMCCodeEmitter::
+getBDXAddr20Encoding(const MCInst &MI, unsigned OpNum,
+                     SmallVectorImpl<MCFixup> &Fixups) const {
+  uint64_t Base = getMachineOpValue(MI, MI.getOperand(OpNum), Fixups);
+  uint64_t Disp = getMachineOpValue(MI, MI.getOperand(OpNum + 1), Fixups);
+  uint64_t Index = getMachineOpValue(MI, MI.getOperand(OpNum + 2), Fixups);
+  assert(isUInt<4>(Base) && isInt<20>(Disp) && isUInt<4>(Index));
+  return (Index << 24) | (Base << 20) | ((Disp & 0xfff) << 8)
+    | ((Disp & 0xff000) >> 12);
+}
+
+uint64_t SystemZMCCodeEmitter::
+getBDLAddr12Len8Encoding(const MCInst &MI, unsigned OpNum,
+                         SmallVectorImpl<MCFixup> &Fixups) const {
+  uint64_t Base = getMachineOpValue(MI, MI.getOperand(OpNum), Fixups);
+  uint64_t Disp = getMachineOpValue(MI, MI.getOperand(OpNum + 1), Fixups);
+  uint64_t Len  = getMachineOpValue(MI, MI.getOperand(OpNum + 2), Fixups) - 1;
+  assert(isUInt<4>(Base) && isUInt<12>(Disp) && isUInt<8>(Len));
+  return (Len << 16) | (Base << 12) | Disp;
+}
+
+uint64_t
+SystemZMCCodeEmitter::getPCRelEncoding(const MCInst &MI, unsigned OpNum,
                                        SmallVectorImpl<MCFixup> &Fixups,
                                        unsigned Kind, int64_t Offset) const {
   const MCOperand &MO = MI.getOperand(OpNum);
-  // For compatibility with the GNU assembler, treat constant operands as
-  // unadjusted PC-relative offsets.
+  const MCExpr *Expr;
   if (MO.isImm())
-    return MO.getImm() / 2;
-
-  const MCExpr *Expr = MO.getExpr();
-  if (Offset) {
-    // The operand value is relative to the start of MI, but the fixup
-    // is relative to the operand field itself, which is Offset bytes
-    // into MI.  Add Offset to the relocation value to cancel out
-    // this difference.
-    const MCExpr *OffsetExpr = MCConstantExpr::Create(Offset, Ctx);
-    Expr = MCBinaryExpr::CreateAdd(Expr, OffsetExpr, Ctx);
+    Expr = MCConstantExpr::Create(MO.getImm() + Offset, Ctx);
+  else {
+    Expr = MO.getExpr();
+    if (Offset) {
+      // The operand value is relative to the start of MI, but the fixup
+      // is relative to the operand field itself, which is Offset bytes
+      // into MI.  Add Offset to the relocation value to cancel out
+      // this difference.
+      const MCExpr *OffsetExpr = MCConstantExpr::Create(Offset, Ctx);
+      Expr = MCBinaryExpr::CreateAdd(Expr, OffsetExpr, Ctx);
+    }
   }
   Fixups.push_back(MCFixup::Create(Offset, Expr, (MCFixupKind)Kind));
   return 0;