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, 323 insertions, 0 deletions

diff --git a/contrib/llvm/lib/Target/SystemZ/Disassembler/SystemZDisassembler.cpp b/contrib/llvm/lib/Target/SystemZ/Disassembler/SystemZDisassembler.cpp
new file mode 100644
index 0000000..fc3c38d
--- /dev/null
+++ b/contrib/llvm/lib/Target/SystemZ/Disassembler/SystemZDisassembler.cpp
@@ -0,0 +1,323 @@
+//===-- SystemZDisassembler.cpp - Disassembler for SystemZ ------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "SystemZ.h"
+#include "llvm/MC/MCDisassembler.h"
+#include "llvm/MC/MCFixedLenDisassembler.h"
+#include "llvm/MC/MCInst.h"
+#include "llvm/MC/MCSubtargetInfo.h"
+#include "llvm/Support/MemoryObject.h"
+#include "llvm/Support/TargetRegistry.h"
+
+using namespace llvm;
+
+typedef MCDisassembler::DecodeStatus DecodeStatus;
+
+namespace {
+class SystemZDisassembler : public MCDisassembler {
+public:
+  SystemZDisassembler(const MCSubtargetInfo &STI)
+    : MCDisassembler(STI) {}
+  virtual ~SystemZDisassembler() {}
+
+  // Override MCDisassembler.
+  virtual DecodeStatus getInstruction(MCInst &instr,
+                                      uint64_t &size,
+                                      const MemoryObject &region,
+                                      uint64_t address,
+                                      raw_ostream &vStream,
+                                      raw_ostream &cStream) const LLVM_OVERRIDE;
+};
+} // end anonymous namespace
+
+static MCDisassembler *createSystemZDisassembler(const Target &T,
+                                                 const MCSubtargetInfo &STI) {
+  return new SystemZDisassembler(STI);
+}
+
+extern "C" void LLVMInitializeSystemZDisassembler() {
+  // Register the disassembler.
+  TargetRegistry::RegisterMCDisassembler(TheSystemZTarget,
+                                         createSystemZDisassembler);
+}
+
+static DecodeStatus decodeRegisterClass(MCInst &Inst, uint64_t RegNo,
+                                        const unsigned *Regs) {
+  assert(RegNo < 16 && "Invalid register");
+  RegNo = Regs[RegNo];
+  if (RegNo == 0)
+    return MCDisassembler::Fail;
+  Inst.addOperand(MCOperand::CreateReg(RegNo));
+  return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeGR32BitRegisterClass(MCInst &Inst, uint64_t RegNo,
+                                               uint64_t Address,
+                                               const void *Decoder) {
+  return decodeRegisterClass(Inst, RegNo, SystemZMC::GR32Regs);
+}
+
+static DecodeStatus DecodeGRH32BitRegisterClass(MCInst &Inst, uint64_t RegNo,
+                                                uint64_t Address,
+                                                const void *Decoder) {
+  return decodeRegisterClass(Inst, RegNo, SystemZMC::GRH32Regs);
+}
+
+static DecodeStatus DecodeGR64BitRegisterClass(MCInst &Inst, uint64_t RegNo,
+                                               uint64_t Address,
+                                               const void *Decoder) {
+  return decodeRegisterClass(Inst, RegNo, SystemZMC::GR64Regs);
+}
+
+static DecodeStatus DecodeGR128BitRegisterClass(MCInst &Inst, uint64_t RegNo,
+                                                uint64_t Address,
+                                                const void *Decoder) {
+  return decodeRegisterClass(Inst, RegNo, SystemZMC::GR128Regs);
+}
+
+static DecodeStatus DecodeADDR64BitRegisterClass(MCInst &Inst, uint64_t RegNo,
+                                                 uint64_t Address,
+                                                 const void *Decoder) {
+  return decodeRegisterClass(Inst, RegNo, SystemZMC::GR64Regs);
+}
+
+static DecodeStatus DecodeFP32BitRegisterClass(MCInst &Inst, uint64_t RegNo,
+                                               uint64_t Address,
+                                               const void *Decoder) {
+  return decodeRegisterClass(Inst, RegNo, SystemZMC::FP32Regs);
+}
+
+static DecodeStatus DecodeFP64BitRegisterClass(MCInst &Inst, uint64_t RegNo,
+                                               uint64_t Address,
+                                               const void *Decoder) {
+  return decodeRegisterClass(Inst, RegNo, SystemZMC::FP64Regs);
+}
+
+static DecodeStatus DecodeFP128BitRegisterClass(MCInst &Inst, uint64_t RegNo,
+                                                uint64_t Address,
+                                                const void *Decoder) {
+  return decodeRegisterClass(Inst, RegNo, SystemZMC::FP128Regs);
+}
+
+template<unsigned N>
+static DecodeStatus decodeUImmOperand(MCInst &Inst, uint64_t Imm) {
+  assert(isUInt<N>(Imm) && "Invalid immediate");
+  Inst.addOperand(MCOperand::CreateImm(Imm));
+  return MCDisassembler::Success;
+}
+
+template<unsigned N>
+static DecodeStatus decodeSImmOperand(MCInst &Inst, uint64_t Imm) {
+  assert(isUInt<N>(Imm) && "Invalid immediate");
+  Inst.addOperand(MCOperand::CreateImm(SignExtend64<N>(Imm)));
+  return MCDisassembler::Success;
+}
+
+static DecodeStatus decodeAccessRegOperand(MCInst &Inst, uint64_t Imm,
+                                           uint64_t Address,
+                                           const void *Decoder) {
+  return decodeUImmOperand<4>(Inst, Imm);
+}
+
+static DecodeStatus decodeU4ImmOperand(MCInst &Inst, uint64_t Imm,
+                                       uint64_t Address, const void *Decoder) {
+  return decodeUImmOperand<4>(Inst, Imm);
+}
+
+static DecodeStatus decodeU6ImmOperand(MCInst &Inst, uint64_t Imm,
+                                       uint64_t Address, const void *Decoder) {
+  return decodeUImmOperand<6>(Inst, Imm);
+}
+
+static DecodeStatus decodeU8ImmOperand(MCInst &Inst, uint64_t Imm,
+                                       uint64_t Address, const void *Decoder) {
+  return decodeUImmOperand<8>(Inst, Imm);
+}
+
+static DecodeStatus decodeU16ImmOperand(MCInst &Inst, uint64_t Imm,
+                                        uint64_t Address, const void *Decoder) {
+  return decodeUImmOperand<16>(Inst, Imm);
+}
+
+static DecodeStatus decodeU32ImmOperand(MCInst &Inst, uint64_t Imm,
+                                        uint64_t Address, const void *Decoder) {
+  return decodeUImmOperand<32>(Inst, Imm);
+}
+
+static DecodeStatus decodeS8ImmOperand(MCInst &Inst, uint64_t Imm,
+                                       uint64_t Address, const void *Decoder) {
+  return decodeSImmOperand<8>(Inst, Imm);
+}
+
+static DecodeStatus decodeS16ImmOperand(MCInst &Inst, uint64_t Imm,
+                                        uint64_t Address, const void *Decoder) {
+  return decodeSImmOperand<16>(Inst, Imm);
+}
+
+static DecodeStatus decodeS32ImmOperand(MCInst &Inst, uint64_t Imm,
+                                        uint64_t Address, const void *Decoder) {
+  return decodeSImmOperand<32>(Inst, Imm);
+}
+
+template<unsigned N>
+static DecodeStatus decodePCDBLOperand(MCInst &Inst, uint64_t Imm,
+                                       uint64_t Address) {
+  assert(isUInt<N>(Imm) && "Invalid PC-relative offset");
+  Inst.addOperand(MCOperand::CreateImm(SignExtend64<N>(Imm) * 2 + Address));
+  return MCDisassembler::Success;
+}
+
+static DecodeStatus decodePC16DBLOperand(MCInst &Inst, uint64_t Imm,
+                                         uint64_t Address,
+                                         const void *Decoder) {
+  return decodePCDBLOperand<16>(Inst, Imm, Address);
+}
+
+static DecodeStatus decodePC32DBLOperand(MCInst &Inst, uint64_t Imm,
+                                         uint64_t Address,
+                                         const void *Decoder) {
+  return decodePCDBLOperand<32>(Inst, Imm, Address);
+}
+
+static DecodeStatus decodeBDAddr12Operand(MCInst &Inst, uint64_t Field,
+                                          const unsigned *Regs) {
+  uint64_t Base = Field >> 12;
+  uint64_t Disp = Field & 0xfff;
+  assert(Base < 16 && "Invalid BDAddr12");
+  Inst.addOperand(MCOperand::CreateReg(Base == 0 ? 0 : Regs[Base]));
+  Inst.addOperand(MCOperand::CreateImm(Disp));
+  return MCDisassembler::Success;
+}
+
+static DecodeStatus decodeBDAddr20Operand(MCInst &Inst, uint64_t Field,
+                                          const unsigned *Regs) {
+  uint64_t Base = Field >> 20;
+  uint64_t Disp = ((Field << 12) & 0xff000) | ((Field >> 8) & 0xfff);
+  assert(Base < 16 && "Invalid BDAddr20");
+  Inst.addOperand(MCOperand::CreateReg(Base == 0 ? 0 : Regs[Base]));
+  Inst.addOperand(MCOperand::CreateImm(SignExtend64<20>(Disp)));
+  return MCDisassembler::Success;
+}
+
+static DecodeStatus decodeBDXAddr12Operand(MCInst &Inst, uint64_t Field,
+                                           const unsigned *Regs) {
+  uint64_t Index = Field >> 16;
+  uint64_t Base = (Field >> 12) & 0xf;
+  uint64_t Disp = Field & 0xfff;
+  assert(Index < 16 && "Invalid BDXAddr12");
+  Inst.addOperand(MCOperand::CreateReg(Base == 0 ? 0 : Regs[Base]));
+  Inst.addOperand(MCOperand::CreateImm(Disp));
+  Inst.addOperand(MCOperand::CreateReg(Index == 0 ? 0 : Regs[Index]));
+  return MCDisassembler::Success;
+}
+
+static DecodeStatus decodeBDXAddr20Operand(MCInst &Inst, uint64_t Field,
+                                           const unsigned *Regs) {
+  uint64_t Index = Field >> 24;
+  uint64_t Base = (Field >> 20) & 0xf;
+  uint64_t Disp = ((Field & 0xfff00) >> 8) | ((Field & 0xff) << 12);
+  assert(Index < 16 && "Invalid BDXAddr20");
+  Inst.addOperand(MCOperand::CreateReg(Base == 0 ? 0 : Regs[Base]));
+  Inst.addOperand(MCOperand::CreateImm(SignExtend64<20>(Disp)));
+  Inst.addOperand(MCOperand::CreateReg(Index == 0 ? 0 : Regs[Index]));
+  return MCDisassembler::Success;
+}
+
+static DecodeStatus decodeBDLAddr12Len8Operand(MCInst &Inst, uint64_t Field,
+                                               const unsigned *Regs) {
+  uint64_t Length = Field >> 16;
+  uint64_t Base = (Field >> 12) & 0xf;
+  uint64_t Disp = Field & 0xfff;
+  assert(Length < 256 && "Invalid BDLAddr12Len8");
+  Inst.addOperand(MCOperand::CreateReg(Base == 0 ? 0 : Regs[Base]));
+  Inst.addOperand(MCOperand::CreateImm(Disp));
+  Inst.addOperand(MCOperand::CreateImm(Length + 1));
+  return MCDisassembler::Success;
+}
+
+static DecodeStatus decodeBDAddr32Disp12Operand(MCInst &Inst, uint64_t Field,
+                                                uint64_t Address,
+                                                const void *Decoder) {
+  return decodeBDAddr12Operand(Inst, Field, SystemZMC::GR32Regs);
+}
+
+static DecodeStatus decodeBDAddr32Disp20Operand(MCInst &Inst, uint64_t Field,
+                                                uint64_t Address,
+                                                const void *Decoder) {
+  return decodeBDAddr20Operand(Inst, Field, SystemZMC::GR32Regs);
+}
+
+static DecodeStatus decodeBDAddr64Disp12Operand(MCInst &Inst, uint64_t Field,
+                                                uint64_t Address,
+                                                const void *Decoder) {
+  return decodeBDAddr12Operand(Inst, Field, SystemZMC::GR64Regs);
+}
+
+static DecodeStatus decodeBDAddr64Disp20Operand(MCInst &Inst, uint64_t Field,
+                                                uint64_t Address,
+                                                const void *Decoder) {
+  return decodeBDAddr20Operand(Inst, Field, SystemZMC::GR64Regs);
+}
+
+static DecodeStatus decodeBDXAddr64Disp12Operand(MCInst &Inst, uint64_t Field,
+                                                 uint64_t Address,
+                                                 const void *Decoder) {
+  return decodeBDXAddr12Operand(Inst, Field, SystemZMC::GR64Regs);
+}
+
+static DecodeStatus decodeBDXAddr64Disp20Operand(MCInst &Inst, uint64_t Field,
+                                                 uint64_t Address,
+                                                 const void *Decoder) {
+  return decodeBDXAddr20Operand(Inst, Field, SystemZMC::GR64Regs);
+}
+
+static DecodeStatus decodeBDLAddr64Disp12Len8Operand(MCInst &Inst,
+                                                     uint64_t Field,
+                                                     uint64_t Address,
+                                                     const void *Decoder) {
+  return decodeBDLAddr12Len8Operand(Inst, Field, SystemZMC::GR64Regs);
+}
+
+#include "SystemZGenDisassemblerTables.inc"
+
+DecodeStatus SystemZDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
+                                                 const MemoryObject &Region,
+                                                 uint64_t Address,
+                                                 raw_ostream &os,
+                                                 raw_ostream &cs) const {
+  // Get the first two bytes of the instruction.
+  uint8_t Bytes[6];
+  Size = 0;
+  if (Region.readBytes(Address, 2, Bytes) == -1)
+    return MCDisassembler::Fail;
+
+  // The top 2 bits of the first byte specify the size.
+  const uint8_t *Table;
+  if (Bytes[0] < 0x40) {
+    Size = 2;
+    Table = DecoderTable16;
+  } else if (Bytes[0] < 0xc0) {
+    Size = 4;
+    Table = DecoderTable32;
+  } else {
+    Size = 6;
+    Table = DecoderTable48;
+  }
+
+  // Read any remaining bytes.
+  if (Size > 2 && Region.readBytes(Address + 2, Size - 2, Bytes + 2) == -1)
+    return MCDisassembler::Fail;
+
+  // Construct the instruction.
+  uint64_t Inst = 0;
+  for (uint64_t I = 0; I < Size; ++I)
+    Inst = (Inst << 8) | Bytes[I];
+
+  return decodeInstruction(Table, MI, Inst, Address, this, STI);
+}