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, 0 insertions, 343 deletions

diff --git a/contrib/llvm/lib/Target/R600/AMDGPUIndirectAddressing.cpp b/contrib/llvm/lib/Target/R600/AMDGPUIndirectAddressing.cpp
deleted file mode 100644
index ed6c8ec..0000000
--- a/contrib/llvm/lib/Target/R600/AMDGPUIndirectAddressing.cpp
+++ /dev/null
@@ -1,343 +0,0 @@
-//===-- AMDGPUIndirectAddressing.cpp - Indirect Adressing Support ---------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-/// \file
-///
-/// Instructions can use indirect addressing to index the register file as if it
-/// were memory.  This pass lowers RegisterLoad and RegisterStore instructions
-/// to either a COPY or a MOV that uses indirect addressing.
-//
-//===----------------------------------------------------------------------===//
-
-#include "AMDGPU.h"
-#include "R600InstrInfo.h"
-#include "R600MachineFunctionInfo.h"
-#include "llvm/CodeGen/MachineFunction.h"
-#include "llvm/CodeGen/MachineFunctionPass.h"
-#include "llvm/CodeGen/MachineInstrBuilder.h"
-#include "llvm/CodeGen/MachineRegisterInfo.h"
-#include "llvm/Support/Debug.h"
-
-using namespace llvm;
-
-namespace {
-
-class AMDGPUIndirectAddressingPass : public MachineFunctionPass {
-
-private:
-  static char ID;
-  const AMDGPUInstrInfo *TII;
-
-  bool regHasExplicitDef(MachineRegisterInfo &MRI, unsigned Reg) const;
-
-public:
-  AMDGPUIndirectAddressingPass(TargetMachine &tm) :
-    MachineFunctionPass(ID),
-    TII(static_cast<const AMDGPUInstrInfo*>(tm.getInstrInfo()))
-    { }
-
-  virtual bool runOnMachineFunction(MachineFunction &MF);
-
-  const char *getPassName() const { return "R600 Handle indirect addressing"; }
-
-};
-
-} // End anonymous namespace
-
-char AMDGPUIndirectAddressingPass::ID = 0;
-
-FunctionPass *llvm::createAMDGPUIndirectAddressingPass(TargetMachine &tm) {
-  return new AMDGPUIndirectAddressingPass(tm);
-}
-
-bool AMDGPUIndirectAddressingPass::runOnMachineFunction(MachineFunction &MF) {
-  MachineRegisterInfo &MRI = MF.getRegInfo();
-
-  int IndirectBegin = TII->getIndirectIndexBegin(MF);
-  int IndirectEnd = TII->getIndirectIndexEnd(MF);
-
-  if (IndirectBegin == -1) {
-    // No indirect addressing, we can skip this pass
-    assert(IndirectEnd == -1);
-    return false;
-  }
-
-  // The map keeps track of the indirect address that is represented by
-  // each virtual register. The key is the register and the value is the
-  // indirect address it uses.
-  std::map<unsigned, unsigned> RegisterAddressMap;
-
-  // First pass - Lower all of the RegisterStore instructions and track which
-  // registers are live.
-  for (MachineFunction::iterator BB = MF.begin(), BB_E = MF.end();
-                                                      BB != BB_E; ++BB) {
-    // This map keeps track of the current live indirect registers.
-    // The key is the address and the value is the register
-    std::map<unsigned, unsigned> LiveAddressRegisterMap;
-    MachineBasicBlock &MBB = *BB;
-
-    for (MachineBasicBlock::iterator I = MBB.begin(), Next = llvm::next(I);
-                               I != MBB.end(); I = Next) {
-      Next = llvm::next(I);
-      MachineInstr &MI = *I;
-
-      if (!TII->isRegisterStore(MI)) {
-        continue;
-      }
-
-      // Lower RegisterStore
-
-      unsigned RegIndex = MI.getOperand(2).getImm();
-      unsigned Channel = MI.getOperand(3).getImm();
-      unsigned Address = TII->calculateIndirectAddress(RegIndex, Channel);
-      const TargetRegisterClass *IndirectStoreRegClass =
-                   TII->getIndirectAddrStoreRegClass(MI.getOperand(0).getReg());
-
-      if (MI.getOperand(1).getReg() == AMDGPU::INDIRECT_BASE_ADDR) {
-        // Direct register access.
-        unsigned DstReg = MRI.createVirtualRegister(IndirectStoreRegClass);
-
-        BuildMI(MBB, I, MBB.findDebugLoc(I), TII->get(AMDGPU::COPY), DstReg)
-                .addOperand(MI.getOperand(0));
-
-        RegisterAddressMap[DstReg] = Address;
-        LiveAddressRegisterMap[Address] = DstReg;
-      } else {
-        // Indirect register access.
-        MachineInstrBuilder MOV = TII->buildIndirectWrite(BB, I,
-                                           MI.getOperand(0).getReg(), // Value
-                                           Address,
-                                           MI.getOperand(1).getReg()); // Offset
-        for (int i = IndirectBegin; i <= IndirectEnd; ++i) {
-          unsigned Addr = TII->calculateIndirectAddress(i, Channel);
-          unsigned DstReg = MRI.createVirtualRegister(IndirectStoreRegClass);
-          MOV.addReg(DstReg, RegState::Define | RegState::Implicit);
-          RegisterAddressMap[DstReg] = Addr;
-          LiveAddressRegisterMap[Addr] = DstReg;
-        }
-      }
-      MI.eraseFromParent();
-    }
-
-    // Update the live-ins of the succesor blocks
-    for (MachineBasicBlock::succ_iterator Succ = MBB.succ_begin(),
-                                          SuccEnd = MBB.succ_end();
-                                          SuccEnd != Succ; ++Succ) {
-      std::map<unsigned, unsigned>::const_iterator Key, KeyEnd;
-      for (Key = LiveAddressRegisterMap.begin(),
-           KeyEnd = LiveAddressRegisterMap.end(); KeyEnd != Key; ++Key) {
-        (*Succ)->addLiveIn(Key->second);
-      }
-    }
-  }
-
-  // Second pass - Lower the RegisterLoad instructions
-  for (MachineFunction::iterator BB = MF.begin(), BB_E = MF.end();
-                                                      BB != BB_E; ++BB) {
-    // Key is the address and the value is the register
-    std::map<unsigned, unsigned> LiveAddressRegisterMap;
-    MachineBasicBlock &MBB = *BB;
-
-    MachineBasicBlock::livein_iterator LI = MBB.livein_begin();
-    while (LI != MBB.livein_end()) {
-      std::vector<unsigned> PhiRegisters;
-
-      // Make sure this live in is used for indirect addressing
-      if (RegisterAddressMap.find(*LI) == RegisterAddressMap.end()) {
-        ++LI;
-        continue;
-      }
-
-      unsigned Address = RegisterAddressMap[*LI];
-      LiveAddressRegisterMap[Address] = *LI;
-      PhiRegisters.push_back(*LI);
-
-      // Check if there are other live in registers which map to the same
-      // indirect address.
-      for (MachineBasicBlock::livein_iterator LJ = llvm::next(LI),
-                                              LE = MBB.livein_end();
-                                              LJ != LE; ++LJ) {
-        unsigned Reg = *LJ;
-        if (RegisterAddressMap.find(Reg) == RegisterAddressMap.end()) {
-          continue;
-        }
-
-        if (RegisterAddressMap[Reg] == Address) {
-          PhiRegisters.push_back(Reg);
-        }
-      }
-
-      if (PhiRegisters.size() == 1) {
-        // We don't need to insert a Phi instruction, so we can just add the
-        // registers to the live list for the block.
-        LiveAddressRegisterMap[Address] = *LI;
-        MBB.removeLiveIn(*LI);
-      } else {
-        // We need to insert a PHI, because we have the same address being
-        // written in multiple predecessor blocks.
-        const TargetRegisterClass *PhiDstClass =
-                   TII->getIndirectAddrStoreRegClass(*(PhiRegisters.begin()));
-        unsigned PhiDstReg = MRI.createVirtualRegister(PhiDstClass);
-        MachineInstrBuilder Phi = BuildMI(MBB, MBB.begin(),
-                                          MBB.findDebugLoc(MBB.begin()),
-                                          TII->get(AMDGPU::PHI), PhiDstReg);
-
-        for (std::vector<unsigned>::const_iterator RI = PhiRegisters.begin(),
-                                                   RE = PhiRegisters.end();
-                                                   RI != RE; ++RI) {
-          unsigned Reg = *RI;
-          MachineInstr *DefInst = MRI.getVRegDef(Reg);
-          assert(DefInst);
-          MachineBasicBlock *RegBlock = DefInst->getParent();
-          Phi.addReg(Reg);
-          Phi.addMBB(RegBlock);
-          MBB.removeLiveIn(Reg);
-        }
-        RegisterAddressMap[PhiDstReg] = Address;
-        LiveAddressRegisterMap[Address] = PhiDstReg;
-      }
-      LI = MBB.livein_begin();
-    }
-
-    for (MachineBasicBlock::iterator I = MBB.begin(), Next = llvm::next(I);
-                               I != MBB.end(); I = Next) {
-      Next = llvm::next(I);
-      MachineInstr &MI = *I;
-
-      if (!TII->isRegisterLoad(MI)) {
-        if (MI.getOpcode() == AMDGPU::PHI) {
-          continue;
-        }
-        // Check for indirect register defs
-        for (unsigned OpIdx = 0, NumOperands = MI.getNumOperands();
-                                 OpIdx < NumOperands; ++OpIdx) {
-          MachineOperand &MO = MI.getOperand(OpIdx);
-          if (MO.isReg() && MO.isDef() &&
-              RegisterAddressMap.find(MO.getReg()) != RegisterAddressMap.end()) {
-            unsigned Reg = MO.getReg();
-            unsigned LiveAddress = RegisterAddressMap[Reg];
-            // Chain the live-ins
-            if (LiveAddressRegisterMap.find(LiveAddress) !=
-                                                     RegisterAddressMap.end()) {
-              MI.addOperand(MachineOperand::CreateReg(
-                                  LiveAddressRegisterMap[LiveAddress],
-                                  false, // isDef
-                                  true,  // isImp
-                                  true));  // isKill
-            }
-            LiveAddressRegisterMap[LiveAddress] = Reg;
-          }
-        }
-        continue;
-      }
-
-      const TargetRegisterClass *SuperIndirectRegClass =
-                                                TII->getSuperIndirectRegClass();
-      const TargetRegisterClass *IndirectLoadRegClass =
-                                             TII->getIndirectAddrLoadRegClass();
-      unsigned IndirectReg = MRI.createVirtualRegister(SuperIndirectRegClass);
-
-      unsigned RegIndex = MI.getOperand(2).getImm();
-      unsigned Channel = MI.getOperand(3).getImm();
-      unsigned Address = TII->calculateIndirectAddress(RegIndex, Channel);
-
-      if (MI.getOperand(1).getReg() == AMDGPU::INDIRECT_BASE_ADDR) {
-        // Direct register access
-        unsigned Reg = LiveAddressRegisterMap[Address];
-        unsigned AddrReg = IndirectLoadRegClass->getRegister(Address);
-
-        if (regHasExplicitDef(MRI, Reg)) {
-          // If the register we are reading from has an explicit def, then that
-          // means it was written via a direct register access (i.e. COPY
-          // or other instruction that doesn't use indirect addressing).  In
-          // this case we know where the value has been stored, so we can just
-          // issue a copy.
-          BuildMI(MBB, I, MBB.findDebugLoc(I), TII->get(AMDGPU::COPY),
-                  MI.getOperand(0).getReg())
-                  .addReg(Reg);
-        } else {
-          // If the register we are reading has an implicit def, then that
-          // means it was written by an indirect register access (i.e. An
-          // instruction that uses indirect addressing. 
-          BuildMI(MBB, I, MBB.findDebugLoc(I), TII->get(AMDGPU::COPY),
-                   MI.getOperand(0).getReg())
-                   .addReg(AddrReg)
-                   .addReg(Reg, RegState::Implicit);
-        }
-      } else {
-        // Indirect register access
-
-        // Note on REQ_SEQUENCE instructons: You can't actually use the register
-        // it defines unless  you have an instruction that takes the defined
-        // register class as an operand.
-
-        MachineInstrBuilder Sequence = BuildMI(MBB, I, MBB.findDebugLoc(I),
-                                               TII->get(AMDGPU::REG_SEQUENCE),
-                                               IndirectReg);
-        for (int i = IndirectBegin; i <= IndirectEnd; ++i) {
-          unsigned Addr = TII->calculateIndirectAddress(i, Channel);
-          if (LiveAddressRegisterMap.find(Addr) == LiveAddressRegisterMap.end()) {
-            continue;
-          }
-          unsigned Reg = LiveAddressRegisterMap[Addr];
-
-          // We only need to use REG_SEQUENCE for explicit defs, since the
-          // register coalescer won't do anything with the implicit defs.
-          if (!regHasExplicitDef(MRI, Reg)) {
-            continue;
-          }
-
-          // Insert a REQ_SEQUENCE instruction to force the register allocator
-          // to allocate the virtual register to the correct physical register.
-          Sequence.addReg(LiveAddressRegisterMap[Addr]);
-          Sequence.addImm(TII->getRegisterInfo().getIndirectSubReg(Addr));
-        }
-        MachineInstrBuilder Mov = TII->buildIndirectRead(BB, I,
-                                           MI.getOperand(0).getReg(), // Value
-                                           Address,
-                                           MI.getOperand(1).getReg()); // Offset
-
-
-
-        Mov.addReg(IndirectReg, RegState::Implicit | RegState::Kill);
-        Mov.addReg(LiveAddressRegisterMap[Address], RegState::Implicit);
-
-      }
-      MI.eraseFromParent();
-    }
-  }
-  return false;
-}
-
-bool AMDGPUIndirectAddressingPass::regHasExplicitDef(MachineRegisterInfo &MRI,
-                                                  unsigned Reg) const {
-  MachineInstr *DefInstr = MRI.getVRegDef(Reg);
-
-  if (!DefInstr) {
-    return false;
-  }
-
-  if (DefInstr->getOpcode() == AMDGPU::PHI) {
-    bool Explicit = false;
-    for (MachineInstr::const_mop_iterator I = DefInstr->operands_begin(),
-                                          E = DefInstr->operands_end();
-                                          I != E; ++I) {
-      const MachineOperand &MO = *I;
-      if (!MO.isReg() || MO.isDef()) {
-        continue;
-      }
-
-      Explicit = Explicit || regHasExplicitDef(MRI, MO.getReg());
-    }
-    return Explicit;
-  }
-
-  return DefInstr->getOperand(0).isReg() &&
-         DefInstr->getOperand(0).getReg() == Reg;
-}