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++.

5 files changed, 13 insertions, 912 deletions

diff --git a/contrib/llvm/lib/ExecutionEngine/JIT/JIT.cpp b/contrib/llvm/lib/ExecutionEngine/JIT/JIT.cpp
index 53ea0a2..246a675 100644
--- a/contrib/llvm/lib/ExecutionEngine/JIT/JIT.cpp
+++ b/contrib/llvm/lib/ExecutionEngine/JIT/JIT.cpp
@@ -67,140 +67,6 @@ static struct RegisterJIT {
 extern "C" void LLVMLinkInJIT() {
 }
 
-// Determine whether we can register EH tables.
-#if (defined(__GNUC__) && !defined(__ARM_EABI__) && \
-     !defined(__USING_SJLJ_EXCEPTIONS__))
-#define HAVE_EHTABLE_SUPPORT 1
-#else
-#define HAVE_EHTABLE_SUPPORT 0
-#endif
-
-#if HAVE_EHTABLE_SUPPORT
-
-// libgcc defines the __register_frame function to dynamically register new
-// dwarf frames for exception handling. This functionality is not portable
-// across compilers and is only provided by GCC. We use the __register_frame
-// function here so that code generated by the JIT cooperates with the unwinding
-// runtime of libgcc. When JITting with exception handling enable, LLVM
-// generates dwarf frames and registers it to libgcc with __register_frame.
-//
-// The __register_frame function works with Linux.
-//
-// Unfortunately, this functionality seems to be in libgcc after the unwinding
-// library of libgcc for darwin was written. The code for darwin overwrites the
-// value updated by __register_frame with a value fetched with "keymgr".
-// "keymgr" is an obsolete functionality, which should be rewritten some day.
-// In the meantime, since "keymgr" is on all libgccs shipped with apple-gcc, we
-// need a workaround in LLVM which uses the "keymgr" to dynamically modify the
-// values of an opaque key, used by libgcc to find dwarf tables.
-
-extern "C" void __register_frame(void*);
-extern "C" void __deregister_frame(void*);
-
-#if defined(__APPLE__) && MAC_OS_X_VERSION_MAX_ALLOWED <= 1050
-# define USE_KEYMGR 1
-#else
-# define USE_KEYMGR 0
-#endif
-
-#if USE_KEYMGR
-
-namespace {
-
-// LibgccObject - This is the structure defined in libgcc. There is no #include
-// provided for this structure, so we also define it here. libgcc calls it
-// "struct object". The structure is undocumented in libgcc.
-struct LibgccObject {
-  void *unused1;
-  void *unused2;
-  void *unused3;
-
-  /// frame - Pointer to the exception table.
-  void *frame;
-
-  /// encoding -  The encoding of the object?
-  union {
-    struct {
-      unsigned long sorted : 1;
-      unsigned long from_array : 1;
-      unsigned long mixed_encoding : 1;
-      unsigned long encoding : 8;
-      unsigned long count : 21;
-    } b;
-    size_t i;
-  } encoding;
-
-  /// fde_end - libgcc defines this field only if some macro is defined. We
-  /// include this field even if it may not there, to make libgcc happy.
-  char *fde_end;
-
-  /// next - At least we know it's a chained list!
-  struct LibgccObject *next;
-};
-
-// "kemgr" stuff. Apparently, all frame tables are stored there.
-extern "C" void _keymgr_set_and_unlock_processwide_ptr(int, void *);
-extern "C" void *_keymgr_get_and_lock_processwide_ptr(int);
-#define KEYMGR_GCC3_DW2_OBJ_LIST        302     /* Dwarf2 object list  */
-
-/// LibgccObjectInfo - libgcc defines this struct as km_object_info. It
-/// probably contains all dwarf tables that are loaded.
-struct LibgccObjectInfo {
-
-  /// seenObjects - LibgccObjects already parsed by the unwinding runtime.
-  ///
-  struct LibgccObject* seenObjects;
-
-  /// unseenObjects - LibgccObjects not parsed yet by the unwinding runtime.
-  ///
-  struct LibgccObject* unseenObjects;
-
-  unsigned unused[2];
-};
-
-/// darwin_register_frame - Since __register_frame does not work with darwin's
-/// libgcc,we provide our own function, which "tricks" libgcc by modifying the
-/// "Dwarf2 object list" key.
-void DarwinRegisterFrame(void* FrameBegin) {
-  // Get the key.
-  LibgccObjectInfo* LOI = (struct LibgccObjectInfo*)
-    _keymgr_get_and_lock_processwide_ptr(KEYMGR_GCC3_DW2_OBJ_LIST);
-  assert(LOI && "This should be preallocated by the runtime");
-
-  // Allocate a new LibgccObject to represent this frame. Deallocation of this
-  // object may be impossible: since darwin code in libgcc was written after
-  // the ability to dynamically register frames, things may crash if we
-  // deallocate it.
-  struct LibgccObject* ob = (struct LibgccObject*)
-    malloc(sizeof(struct LibgccObject));
-
-  // Do like libgcc for the values of the field.
-  ob->unused1 = (void *)-1;
-  ob->unused2 = 0;
-  ob->unused3 = 0;
-  ob->frame = FrameBegin;
-  ob->encoding.i = 0;
-  ob->encoding.b.encoding = llvm::dwarf::DW_EH_PE_omit;
-
-  // Put the info on both places, as libgcc uses the first or the second
-  // field. Note that we rely on having two pointers here. If fde_end was a
-  // char, things would get complicated.
-  ob->fde_end = (char*)LOI->unseenObjects;
-  ob->next = LOI->unseenObjects;
-
-  // Update the key's unseenObjects list.
-  LOI->unseenObjects = ob;
-
-  // Finally update the "key". Apparently, libgcc requires it.
-  _keymgr_set_and_unlock_processwide_ptr(KEYMGR_GCC3_DW2_OBJ_LIST,
-                                         LOI);
-
-}
-
-}
-#endif // __APPLE__
-#endif // HAVE_EHTABLE_SUPPORT
-
 /// createJIT - This is the factory method for creating a JIT for the current
 /// machine, it does not fall back to the interpreter.  This takes ownership
 /// of the module.
@@ -293,33 +159,11 @@ JIT::JIT(Module *M, TargetMachine &tm, TargetJITInfo &tji,
     report_fatal_error("Target does not support machine code emission!");
   }
 
-  // Register routine for informing unwinding runtime about new EH frames
-#if HAVE_EHTABLE_SUPPORT
-#if USE_KEYMGR
-  struct LibgccObjectInfo* LOI = (struct LibgccObjectInfo*)
-    _keymgr_get_and_lock_processwide_ptr(KEYMGR_GCC3_DW2_OBJ_LIST);
-
-  // The key is created on demand, and libgcc creates it the first time an
-  // exception occurs. Since we need the key to register frames, we create
-  // it now.
-  if (!LOI)
-    LOI = (LibgccObjectInfo*)calloc(sizeof(struct LibgccObjectInfo), 1);
-  _keymgr_set_and_unlock_processwide_ptr(KEYMGR_GCC3_DW2_OBJ_LIST, LOI);
-  InstallExceptionTableRegister(DarwinRegisterFrame);
-  // Not sure about how to deregister on Darwin.
-#else
-  InstallExceptionTableRegister(__register_frame);
-  InstallExceptionTableDeregister(__deregister_frame);
-#endif // __APPLE__
-#endif // HAVE_EHTABLE_SUPPORT
-
   // Initialize passes.
   PM.doInitialization();
 }
 
 JIT::~JIT() {
-  // Unregister all exception tables registered by this JIT.
-  DeregisterAllTables();
   // Cleanup.
   AllJits->Remove(this);
   delete jitstate;
diff --git a/contrib/llvm/lib/ExecutionEngine/JIT/JITDwarfEmitter.cpp b/contrib/llvm/lib/ExecutionEngine/JIT/JITDwarfEmitter.cpp
deleted file mode 100644
index 35d2b8b..0000000
--- a/contrib/llvm/lib/ExecutionEngine/JIT/JITDwarfEmitter.cpp
+++ /dev/null
@@ -1,596 +0,0 @@
-//===----- JITDwarfEmitter.cpp - Write dwarf tables into memory -----------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file defines a JITDwarfEmitter object that is used by the JIT to
-// write dwarf tables to memory.
-//
-//===----------------------------------------------------------------------===//
-
-#include "JITDwarfEmitter.h"
-#include "JIT.h"
-#include "llvm/ADT/DenseMap.h"
-#include "llvm/CodeGen/JITCodeEmitter.h"
-#include "llvm/CodeGen/MachineFunction.h"
-#include "llvm/CodeGen/MachineModuleInfo.h"
-#include "llvm/ExecutionEngine/JITMemoryManager.h"
-#include "llvm/IR/DataLayout.h"
-#include "llvm/IR/Function.h"
-#include "llvm/MC/MCAsmInfo.h"
-#include "llvm/MC/MCSymbol.h"
-#include "llvm/MC/MachineLocation.h"
-#include "llvm/Support/ErrorHandling.h"
-#include "llvm/Target/TargetFrameLowering.h"
-#include "llvm/Target/TargetInstrInfo.h"
-#include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/TargetRegisterInfo.h"
-using namespace llvm;
-
-JITDwarfEmitter::JITDwarfEmitter(JIT& theJit) : MMI(0), Jit(theJit) {}
-
-
-unsigned char* JITDwarfEmitter::EmitDwarfTable(MachineFunction& F,
-                                               JITCodeEmitter& jce,
-                                               unsigned char* StartFunction,
-                                               unsigned char* EndFunction,
-                                               unsigned char* &EHFramePtr) {
-  assert(MMI && "MachineModuleInfo not registered!");
-
-  const TargetMachine& TM = F.getTarget();
-  TD = TM.getDataLayout();
-  stackGrowthDirection = TM.getFrameLowering()->getStackGrowthDirection();
-  RI = TM.getRegisterInfo();
-  MAI = TM.getMCAsmInfo();
-  JCE = &jce;
-
-  unsigned char* ExceptionTable = EmitExceptionTable(&F, StartFunction,
-                                                     EndFunction);
-
-  unsigned char* Result = 0;
-
-  const std::vector<const Function *> Personalities = MMI->getPersonalities();
-  EHFramePtr = EmitCommonEHFrame(Personalities[MMI->getPersonalityIndex()]);
-
-  Result = EmitEHFrame(Personalities[MMI->getPersonalityIndex()], EHFramePtr,
-                       StartFunction, EndFunction, ExceptionTable);
-
-  return Result;
-}
-
-
-void
-JITDwarfEmitter::EmitFrameMoves(intptr_t BaseLabelPtr,
-                                const std::vector<MachineMove> &Moves) const {
-  unsigned PointerSize = TD->getPointerSize();
-  int stackGrowth = stackGrowthDirection == TargetFrameLowering::StackGrowsUp ?
-          PointerSize : -PointerSize;
-  MCSymbol *BaseLabel = 0;
-
-  for (unsigned i = 0, N = Moves.size(); i < N; ++i) {
-    const MachineMove &Move = Moves[i];
-    MCSymbol *Label = Move.getLabel();
-
-    // Throw out move if the label is invalid.
-    if (Label && (*JCE->getLabelLocations())[Label] == 0)
-      continue;
-
-    intptr_t LabelPtr = 0;
-    if (Label) LabelPtr = JCE->getLabelAddress(Label);
-
-    const MachineLocation &Dst = Move.getDestination();
-    const MachineLocation &Src = Move.getSource();
-
-    // Advance row if new location.
-    if (BaseLabelPtr && Label && BaseLabel != Label) {
-      JCE->emitByte(dwarf::DW_CFA_advance_loc4);
-      JCE->emitInt32(LabelPtr - BaseLabelPtr);
-
-      BaseLabel = Label;
-      BaseLabelPtr = LabelPtr;
-    }
-
-    // If advancing cfa.
-    if (Dst.isReg() && Dst.getReg() == MachineLocation::VirtualFP) {
-      if (!Src.isReg()) {
-        if (Src.getReg() == MachineLocation::VirtualFP) {
-          JCE->emitByte(dwarf::DW_CFA_def_cfa_offset);
-        } else {
-          JCE->emitByte(dwarf::DW_CFA_def_cfa);
-          JCE->emitULEB128Bytes(RI->getDwarfRegNum(Src.getReg(), true));
-        }
-
-        JCE->emitULEB128Bytes(-Src.getOffset());
-      } else {
-        llvm_unreachable("Machine move not supported yet.");
-      }
-    } else if (Src.isReg() &&
-      Src.getReg() == MachineLocation::VirtualFP) {
-      if (Dst.isReg()) {
-        JCE->emitByte(dwarf::DW_CFA_def_cfa_register);
-        JCE->emitULEB128Bytes(RI->getDwarfRegNum(Dst.getReg(), true));
-      } else {
-        llvm_unreachable("Machine move not supported yet.");
-      }
-    } else {
-      unsigned Reg = RI->getDwarfRegNum(Src.getReg(), true);
-      int Offset = Dst.getOffset() / stackGrowth;
-
-      if (Offset < 0) {
-        JCE->emitByte(dwarf::DW_CFA_offset_extended_sf);
-        JCE->emitULEB128Bytes(Reg);
-        JCE->emitSLEB128Bytes(Offset);
-      } else if (Reg < 64) {
-        JCE->emitByte(dwarf::DW_CFA_offset + Reg);
-        JCE->emitULEB128Bytes(Offset);
-      } else {
-        JCE->emitByte(dwarf::DW_CFA_offset_extended);
-        JCE->emitULEB128Bytes(Reg);
-        JCE->emitULEB128Bytes(Offset);
-      }
-    }
-  }
-}
-
-/// SharedTypeIds - How many leading type ids two landing pads have in common.
-static unsigned SharedTypeIds(const LandingPadInfo *L,
-                              const LandingPadInfo *R) {
-  const std::vector<int> &LIds = L->TypeIds, &RIds = R->TypeIds;
-  unsigned LSize = LIds.size(), RSize = RIds.size();
-  unsigned MinSize = LSize < RSize ? LSize : RSize;
-  unsigned Count = 0;
-
-  for (; Count != MinSize; ++Count)
-    if (LIds[Count] != RIds[Count])
-      return Count;
-
-  return Count;
-}
-
-
-/// PadLT - Order landing pads lexicographically by type id.
-static bool PadLT(const LandingPadInfo *L, const LandingPadInfo *R) {
-  const std::vector<int> &LIds = L->TypeIds, &RIds = R->TypeIds;
-  unsigned LSize = LIds.size(), RSize = RIds.size();
-  unsigned MinSize = LSize < RSize ? LSize : RSize;
-
-  for (unsigned i = 0; i != MinSize; ++i)
-    if (LIds[i] != RIds[i])
-      return LIds[i] < RIds[i];
-
-  return LSize < RSize;
-}
-
-namespace {
-
-/// ActionEntry - Structure describing an entry in the actions table.
-struct ActionEntry {
-  int ValueForTypeID; // The value to write - may not be equal to the type id.
-  int NextAction;
-  struct ActionEntry *Previous;
-};
-
-/// PadRange - Structure holding a try-range and the associated landing pad.
-struct PadRange {
-  // The index of the landing pad.
-  unsigned PadIndex;
-  // The index of the begin and end labels in the landing pad's label lists.
-  unsigned RangeIndex;
-};
-
-typedef DenseMap<MCSymbol*, PadRange> RangeMapType;
-
-/// CallSiteEntry - Structure describing an entry in the call-site table.
-struct CallSiteEntry {
-  MCSymbol *BeginLabel; // zero indicates the start of the function.
-  MCSymbol *EndLabel;   // zero indicates the end of the function.
-  MCSymbol *PadLabel;   // zero indicates that there is no landing pad.
-  unsigned Action;
-};
-
-}
-
-unsigned char* JITDwarfEmitter::EmitExceptionTable(MachineFunction* MF,
-                                         unsigned char* StartFunction,
-                                         unsigned char* EndFunction) const {
-  assert(MMI && "MachineModuleInfo not registered!");
-
-  // Map all labels and get rid of any dead landing pads.
-  MMI->TidyLandingPads(JCE->getLabelLocations());
-
-  const std::vector<const GlobalVariable *> &TypeInfos = MMI->getTypeInfos();
-  const std::vector<unsigned> &FilterIds = MMI->getFilterIds();
-  const std::vector<LandingPadInfo> &PadInfos = MMI->getLandingPads();
-  if (PadInfos.empty()) return 0;
-
-  // Sort the landing pads in order of their type ids.  This is used to fold
-  // duplicate actions.
-  SmallVector<const LandingPadInfo *, 64> LandingPads;
-  LandingPads.reserve(PadInfos.size());
-  for (unsigned i = 0, N = PadInfos.size(); i != N; ++i)
-    LandingPads.push_back(&PadInfos[i]);
-  std::sort(LandingPads.begin(), LandingPads.end(), PadLT);
-
-  // Negative type ids index into FilterIds, positive type ids index into
-  // TypeInfos.  The value written for a positive type id is just the type
-  // id itself.  For a negative type id, however, the value written is the
-  // (negative) byte offset of the corresponding FilterIds entry.  The byte
-  // offset is usually equal to the type id, because the FilterIds entries
-  // are written using a variable width encoding which outputs one byte per
-  // entry as long as the value written is not too large, but can differ.
-  // This kind of complication does not occur for positive type ids because
-  // type infos are output using a fixed width encoding.
-  // FilterOffsets[i] holds the byte offset corresponding to FilterIds[i].
-  SmallVector<int, 16> FilterOffsets;
-  FilterOffsets.reserve(FilterIds.size());
-  int Offset = -1;
-  for(std::vector<unsigned>::const_iterator I = FilterIds.begin(),
-    E = FilterIds.end(); I != E; ++I) {
-    FilterOffsets.push_back(Offset);
-    Offset -= MCAsmInfo::getULEB128Size(*I);
-  }
-
-  // Compute the actions table and gather the first action index for each
-  // landing pad site.
-  SmallVector<ActionEntry, 32> Actions;
-  SmallVector<unsigned, 64> FirstActions;
-  FirstActions.reserve(LandingPads.size());
-
-  int FirstAction = 0;
-  unsigned SizeActions = 0;
-  for (unsigned i = 0, N = LandingPads.size(); i != N; ++i) {
-    const LandingPadInfo *LP = LandingPads[i];
-    const std::vector<int> &TypeIds = LP->TypeIds;
-    const unsigned NumShared = i ? SharedTypeIds(LP, LandingPads[i-1]) : 0;
-    unsigned SizeSiteActions = 0;
-
-    if (NumShared < TypeIds.size()) {
-      unsigned SizeAction = 0;
-      ActionEntry *PrevAction = 0;
-
-      if (NumShared) {
-        const unsigned SizePrevIds = LandingPads[i-1]->TypeIds.size();
-        assert(Actions.size());
-        PrevAction = &Actions.back();
-        SizeAction = MCAsmInfo::getSLEB128Size(PrevAction->NextAction) +
-          MCAsmInfo::getSLEB128Size(PrevAction->ValueForTypeID);
-        for (unsigned j = NumShared; j != SizePrevIds; ++j) {
-          SizeAction -= MCAsmInfo::getSLEB128Size(PrevAction->ValueForTypeID);
-          SizeAction += -PrevAction->NextAction;
-          PrevAction = PrevAction->Previous;
-        }
-      }
-
-      // Compute the actions.
-      for (unsigned I = NumShared, M = TypeIds.size(); I != M; ++I) {
-        int TypeID = TypeIds[I];
-        assert(-1-TypeID < (int)FilterOffsets.size() && "Unknown filter id!");
-        int ValueForTypeID = TypeID < 0 ? FilterOffsets[-1 - TypeID] : TypeID;
-        unsigned SizeTypeID = MCAsmInfo::getSLEB128Size(ValueForTypeID);
-
-        int NextAction = SizeAction ? -(SizeAction + SizeTypeID) : 0;
-        SizeAction = SizeTypeID + MCAsmInfo::getSLEB128Size(NextAction);
-        SizeSiteActions += SizeAction;
-
-        ActionEntry Action = {ValueForTypeID, NextAction, PrevAction};
-        Actions.push_back(Action);
-
-        PrevAction = &Actions.back();
-      }
-
-      // Record the first action of the landing pad site.
-      FirstAction = SizeActions + SizeSiteActions - SizeAction + 1;
-    } // else identical - re-use previous FirstAction
-
-    FirstActions.push_back(FirstAction);
-
-    // Compute this sites contribution to size.
-    SizeActions += SizeSiteActions;
-  }
-
-  // Compute the call-site table.  Entries must be ordered by address.
-  SmallVector<CallSiteEntry, 64> CallSites;
-
-  RangeMapType PadMap;
-  for (unsigned i = 0, N = LandingPads.size(); i != N; ++i) {
-    const LandingPadInfo *LandingPad = LandingPads[i];
-    for (unsigned j=0, E = LandingPad->BeginLabels.size(); j != E; ++j) {
-      MCSymbol *BeginLabel = LandingPad->BeginLabels[j];
-      assert(!PadMap.count(BeginLabel) && "Duplicate landing pad labels!");
-      PadRange P = { i, j };
-      PadMap[BeginLabel] = P;
-    }
-  }
-
-  bool MayThrow = false;
-  MCSymbol *LastLabel = 0;
-  for (MachineFunction::const_iterator I = MF->begin(), E = MF->end();
-        I != E; ++I) {
-    for (MachineBasicBlock::const_iterator MI = I->begin(), E = I->end();
-          MI != E; ++MI) {
-      if (!MI->isLabel()) {
-        MayThrow |= MI->isCall();
-        continue;
-      }
-
-      MCSymbol *BeginLabel = MI->getOperand(0).getMCSymbol();
-      assert(BeginLabel && "Invalid label!");
-
-      if (BeginLabel == LastLabel)
-        MayThrow = false;
-
-      RangeMapType::iterator L = PadMap.find(BeginLabel);
-
-      if (L == PadMap.end())
-        continue;
-
-      PadRange P = L->second;
-      const LandingPadInfo *LandingPad = LandingPads[P.PadIndex];
-
-      assert(BeginLabel == LandingPad->BeginLabels[P.RangeIndex] &&
-              "Inconsistent landing pad map!");
-
-      // If some instruction between the previous try-range and this one may
-      // throw, create a call-site entry with no landing pad for the region
-      // between the try-ranges.
-      if (MayThrow) {
-        CallSiteEntry Site = {LastLabel, BeginLabel, 0, 0};
-        CallSites.push_back(Site);
-      }
-
-      LastLabel = LandingPad->EndLabels[P.RangeIndex];
-      CallSiteEntry Site = {BeginLabel, LastLabel,
-        LandingPad->LandingPadLabel, FirstActions[P.PadIndex]};
-
-      assert(Site.BeginLabel && Site.EndLabel && Site.PadLabel &&
-              "Invalid landing pad!");
-
-      // Try to merge with the previous call-site.
-      if (CallSites.size()) {
-        CallSiteEntry &Prev = CallSites.back();
-        if (Site.PadLabel == Prev.PadLabel && Site.Action == Prev.Action) {
-          // Extend the range of the previous entry.
-          Prev.EndLabel = Site.EndLabel;
-          continue;
-        }
-      }
-
-      // Otherwise, create a new call-site.
-      CallSites.push_back(Site);
-    }
-  }
-  // If some instruction between the previous try-range and the end of the
-  // function may throw, create a call-site entry with no landing pad for the
-  // region following the try-range.
-  if (MayThrow) {
-    CallSiteEntry Site = {LastLabel, 0, 0, 0};
-    CallSites.push_back(Site);
-  }
-
-  // Final tallies.
-  unsigned SizeSites = CallSites.size() * (sizeof(int32_t) + // Site start.
-                                            sizeof(int32_t) + // Site length.
-                                            sizeof(int32_t)); // Landing pad.
-  for (unsigned i = 0, e = CallSites.size(); i < e; ++i)
-    SizeSites += MCAsmInfo::getULEB128Size(CallSites[i].Action);
-
-  unsigned SizeTypes = TypeInfos.size() * TD->getPointerSize();
-
-  unsigned TypeOffset = sizeof(int8_t) + // Call site format
-                        // Call-site table length
-                        MCAsmInfo::getULEB128Size(SizeSites) +
-                        SizeSites + SizeActions + SizeTypes;
-
-  // Begin the exception table.
-  JCE->emitAlignmentWithFill(4, 0);
-  // Asm->EOL("Padding");
-
-  unsigned char* DwarfExceptionTable = (unsigned char*)JCE->getCurrentPCValue();
-
-  // Emit the header.
-  JCE->emitByte(dwarf::DW_EH_PE_omit);
-  // Asm->EOL("LPStart format (DW_EH_PE_omit)");
-  JCE->emitByte(dwarf::DW_EH_PE_absptr);
-  // Asm->EOL("TType format (DW_EH_PE_absptr)");
-  JCE->emitULEB128Bytes(TypeOffset);
-  // Asm->EOL("TType base offset");
-  JCE->emitByte(dwarf::DW_EH_PE_udata4);
-  // Asm->EOL("Call site format (DW_EH_PE_udata4)");
-  JCE->emitULEB128Bytes(SizeSites);
-  // Asm->EOL("Call-site table length");
-
-  // Emit the landing pad site information.
-  for (unsigned i = 0; i < CallSites.size(); ++i) {
-    CallSiteEntry &S = CallSites[i];
-    intptr_t BeginLabelPtr = 0;
-    intptr_t EndLabelPtr = 0;
-
-    if (!S.BeginLabel) {
-      BeginLabelPtr = (intptr_t)StartFunction;
-      JCE->emitInt32(0);
-    } else {
-      BeginLabelPtr = JCE->getLabelAddress(S.BeginLabel);
-      JCE->emitInt32(BeginLabelPtr - (intptr_t)StartFunction);
-    }
-
-    // Asm->EOL("Region start");
-
-    if (!S.EndLabel)
-      EndLabelPtr = (intptr_t)EndFunction;
-    else
-      EndLabelPtr = JCE->getLabelAddress(S.EndLabel);
-
-    JCE->emitInt32(EndLabelPtr - BeginLabelPtr);
-    //Asm->EOL("Region length");
-
-    if (!S.PadLabel) {
-      JCE->emitInt32(0);
-    } else {
-      unsigned PadLabelPtr = JCE->getLabelAddress(S.PadLabel);
-      JCE->emitInt32(PadLabelPtr - (intptr_t)StartFunction);
-    }
-    // Asm->EOL("Landing pad");
-
-    JCE->emitULEB128Bytes(S.Action);
-    // Asm->EOL("Action");
-  }
-
-  // Emit the actions.
-  for (unsigned I = 0, N = Actions.size(); I != N; ++I) {
-    ActionEntry &Action = Actions[I];
-
-    JCE->emitSLEB128Bytes(Action.ValueForTypeID);
-    //Asm->EOL("TypeInfo index");
-    JCE->emitSLEB128Bytes(Action.NextAction);
-    //Asm->EOL("Next action");
-  }
-
-  // Emit the type ids.
-  for (unsigned M = TypeInfos.size(); M; --M) {
-    const GlobalVariable *GV = TypeInfos[M - 1];
-
-    if (GV) {
-      if (TD->getPointerSize() == sizeof(int32_t))
-        JCE->emitInt32((intptr_t)Jit.getOrEmitGlobalVariable(GV));
-      else
-        JCE->emitInt64((intptr_t)Jit.getOrEmitGlobalVariable(GV));
-    } else {
-      if (TD->getPointerSize() == sizeof(int32_t))
-        JCE->emitInt32(0);
-      else
-        JCE->emitInt64(0);
-    }
-    // Asm->EOL("TypeInfo");
-  }
-
-  // Emit the filter typeids.
-  for (unsigned j = 0, M = FilterIds.size(); j < M; ++j) {
-    unsigned TypeID = FilterIds[j];
-    JCE->emitULEB128Bytes(TypeID);
-    //Asm->EOL("Filter TypeInfo index");
-  }
-
-  JCE->emitAlignmentWithFill(4, 0);
-
-  return DwarfExceptionTable;
-}
-
-unsigned char*
-JITDwarfEmitter::EmitCommonEHFrame(const Function* Personality) const {
-  unsigned PointerSize = TD->getPointerSize();
-  int stackGrowth = stackGrowthDirection == TargetFrameLowering::StackGrowsUp ?
-          PointerSize : -PointerSize;
-
-  unsigned char* StartCommonPtr = (unsigned char*)JCE->getCurrentPCValue();
-  // EH Common Frame header
-  JCE->allocateSpace(4, 0);
-  unsigned char* FrameCommonBeginPtr = (unsigned char*)JCE->getCurrentPCValue();
-  JCE->emitInt32((int)0);
-  JCE->emitByte(dwarf::DW_CIE_VERSION);
-  JCE->emitString(Personality ? "zPLR" : "zR");
-  JCE->emitULEB128Bytes(1);
-  JCE->emitSLEB128Bytes(stackGrowth);
-  JCE->emitByte(RI->getDwarfRegNum(RI->getRARegister(), true));
-
-  if (Personality) {
-    // Augmentation Size: 3 small ULEBs of one byte each, and the personality
-    // function which size is PointerSize.
-    JCE->emitULEB128Bytes(3 + PointerSize);
-
-    // We set the encoding of the personality as direct encoding because we use
-    // the function pointer. The encoding is not relative because the current
-    // PC value may be bigger than the personality function pointer.
-    if (PointerSize == 4) {
-      JCE->emitByte(dwarf::DW_EH_PE_sdata4);
-      JCE->emitInt32(((intptr_t)Jit.getPointerToGlobal(Personality)));
-    } else {
-      JCE->emitByte(dwarf::DW_EH_PE_sdata8);
-      JCE->emitInt64(((intptr_t)Jit.getPointerToGlobal(Personality)));
-    }
-
-    // LSDA encoding: This must match the encoding used in EmitEHFrame ()
-    if (PointerSize == 4)
-      JCE->emitULEB128Bytes(dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4);
-    else
-      JCE->emitULEB128Bytes(dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata8);
-    JCE->emitULEB128Bytes(dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4);
-  } else {
-    JCE->emitULEB128Bytes(1);
-    JCE->emitULEB128Bytes(dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4);
-  }
-
-  EmitFrameMoves(0, MAI->getInitialFrameState());
-
-  JCE->emitAlignmentWithFill(PointerSize, dwarf::DW_CFA_nop);
-
-  JCE->emitInt32At((uintptr_t*)StartCommonPtr,
-                   (uintptr_t)((unsigned char*)JCE->getCurrentPCValue() -
-                               FrameCommonBeginPtr));
-
-  return StartCommonPtr;
-}
-
-
-unsigned char*
-JITDwarfEmitter::EmitEHFrame(const Function* Personality,
-                             unsigned char* StartCommonPtr,
-                             unsigned char* StartFunction,
-                             unsigned char* EndFunction,
-                             unsigned char* ExceptionTable) const {
-  unsigned PointerSize = TD->getPointerSize();
-
-  // EH frame header.
-  unsigned char* StartEHPtr = (unsigned char*)JCE->getCurrentPCValue();
-  JCE->allocateSpace(4, 0);
-  unsigned char* FrameBeginPtr = (unsigned char*)JCE->getCurrentPCValue();
-  // FDE CIE Offset
-  JCE->emitInt32(FrameBeginPtr - StartCommonPtr);
-  JCE->emitInt32(StartFunction - (unsigned char*)JCE->getCurrentPCValue());
-  JCE->emitInt32(EndFunction - StartFunction);
-
-  // If there is a personality and landing pads then point to the language
-  // specific data area in the exception table.
-  if (Personality) {
-    JCE->emitULEB128Bytes(PointerSize == 4 ? 4 : 8);
-
-    if (PointerSize == 4) {
-      if (!MMI->getLandingPads().empty())
-        JCE->emitInt32(ExceptionTable-(unsigned char*)JCE->getCurrentPCValue());
-      else
-        JCE->emitInt32((int)0);
-    } else {
-      if (!MMI->getLandingPads().empty())
-        JCE->emitInt64(ExceptionTable-(unsigned char*)JCE->getCurrentPCValue());
-      else
-        JCE->emitInt64((int)0);
-    }
-  } else {
-    JCE->emitULEB128Bytes(0);
-  }
-
-  // Indicate locations of function specific  callee saved registers in
-  // frame.
-  EmitFrameMoves((intptr_t)StartFunction, MMI->getFrameMoves());
-
-  JCE->emitAlignmentWithFill(PointerSize, dwarf::DW_CFA_nop);
-
-  // Indicate the size of the table
-  JCE->emitInt32At((uintptr_t*)StartEHPtr,
-                   (uintptr_t)((unsigned char*)JCE->getCurrentPCValue() -
-                               StartEHPtr));
-
-  // Double zeroes for the unwind runtime
-  if (PointerSize == 8) {
-    JCE->emitInt64(0);
-    JCE->emitInt64(0);
-  } else {
-    JCE->emitInt32(0);
-    JCE->emitInt32(0);
-  }
-
-  return StartEHPtr;
-}
diff --git a/contrib/llvm/lib/ExecutionEngine/JIT/JITDwarfEmitter.h b/contrib/llvm/lib/ExecutionEngine/JIT/JITDwarfEmitter.h
deleted file mode 100644
index 98ac340..0000000
--- a/contrib/llvm/lib/ExecutionEngine/JIT/JITDwarfEmitter.h
+++ /dev/null
@@ -1,77 +0,0 @@
-//===------ JITDwarfEmitter.h - Write dwarf tables into memory ------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file defines a JITDwarfEmitter object that is used by the JIT to
-// write dwarf tables to memory.
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_EXECUTION_ENGINE_JIT_DWARFEMITTER_H
-#define LLVM_EXECUTION_ENGINE_JIT_DWARFEMITTER_H
-
-#include "llvm/Support/DataTypes.h"
-#include <vector>
-
-namespace llvm {
-
-class Function;
-class JIT;
-class JITCodeEmitter;
-class MachineFunction;
-class MachineModuleInfo;
-class MachineMove;
-class MCAsmInfo;
-class DataLayout;
-class TargetMachine;
-class TargetRegisterInfo;
-
-class JITDwarfEmitter {
-  const DataLayout* TD;
-  JITCodeEmitter* JCE;
-  const TargetRegisterInfo* RI;
-  const MCAsmInfo *MAI;
-  MachineModuleInfo* MMI;
-  JIT& Jit;
-  bool stackGrowthDirection;
-
-  unsigned char* EmitExceptionTable(MachineFunction* MF,
-                                    unsigned char* StartFunction,
-                                    unsigned char* EndFunction) const;
-
-  void EmitFrameMoves(intptr_t BaseLabelPtr,
-                      const std::vector<MachineMove> &Moves) const;
-
-  unsigned char* EmitCommonEHFrame(const Function* Personality) const;
-
-  unsigned char* EmitEHFrame(const Function* Personality,
-                             unsigned char* StartBufferPtr,
-                             unsigned char* StartFunction,
-                             unsigned char* EndFunction,
-                             unsigned char* ExceptionTable) const;
-
-public:
-
-  JITDwarfEmitter(JIT& jit);
-
-  unsigned char* EmitDwarfTable(MachineFunction& F,
-                                JITCodeEmitter& JCE,
-                                unsigned char* StartFunction,
-                                unsigned char* EndFunction,
-                                unsigned char* &EHFramePtr);
-
-
-  void setModuleInfo(MachineModuleInfo* Info) {
-    MMI = Info;
-  }
-};
-
-
-} // end namespace llvm
-
-#endif // LLVM_EXECUTION_ENGINE_JIT_DWARFEMITTER_H
diff --git a/contrib/llvm/lib/ExecutionEngine/JIT/JITEmitter.cpp b/contrib/llvm/lib/ExecutionEngine/JIT/JITEmitter.cpp
index c273876..acbbfa1 100644
--- a/contrib/llvm/lib/ExecutionEngine/JIT/JITEmitter.cpp
+++ b/contrib/llvm/lib/ExecutionEngine/JIT/JITEmitter.cpp
@@ -14,7 +14,6 @@
 
 #define DEBUG_TYPE "jit"
 #include "JIT.h"
-#include "JITDwarfEmitter.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/OwningPtr.h"
 #include "llvm/ADT/SmallPtrSet.h"
@@ -325,9 +324,6 @@ namespace {
     /// Resolver - This contains info about the currently resolved functions.
     JITResolver Resolver;
 
-    /// DE - The dwarf emitter for the jit.
-    OwningPtr<JITDwarfEmitter> DE;
-
     /// LabelLocations - This vector is a mapping from Label ID's to their
     /// address.
     DenseMap<MCSymbol*, uintptr_t> LabelLocations;
@@ -363,22 +359,16 @@ namespace {
     /// Instance of the JIT
     JIT *TheJIT;
 
-    bool JITExceptionHandling;
-
   public:
     JITEmitter(JIT &jit, JITMemoryManager *JMM, TargetMachine &TM)
       : SizeEstimate(0), Resolver(jit, *this), MMI(0), CurFn(0),
-        EmittedFunctions(this), TheJIT(&jit),
-        JITExceptionHandling(TM.Options.JITExceptionHandling) {
+        EmittedFunctions(this), TheJIT(&jit) {
       MemMgr = JMM ? JMM : JITMemoryManager::CreateDefaultMemManager();
       if (jit.getJITInfo().needsGOT()) {
         MemMgr->AllocateGOT();
         DEBUG(dbgs() << "JIT is managing a GOT\n");
       }
 
-      if (JITExceptionHandling) {
-        DE.reset(new JITDwarfEmitter(jit));
-      }
     }
     ~JITEmitter() {
       delete MemMgr;
@@ -460,7 +450,6 @@ namespace {
 
     virtual void setModuleInfo(MachineModuleInfo* Info) {
       MMI = Info;
-      if (DE.get()) DE->setModuleInfo(Info);
     }
 
   private:
@@ -964,40 +953,6 @@ bool JITEmitter::finishFunction(MachineFunction &F) {
       }
     });
 
-  if (JITExceptionHandling) {
-    uintptr_t ActualSize = 0;
-    SavedBufferBegin = BufferBegin;
-    SavedBufferEnd = BufferEnd;
-    SavedCurBufferPtr = CurBufferPtr;
-    uint8_t *FrameRegister;
-
-    while (true) {
-      BufferBegin = CurBufferPtr = MemMgr->startExceptionTable(F.getFunction(),
-                                                               ActualSize);
-      BufferEnd = BufferBegin+ActualSize;
-      EmittedFunctions[F.getFunction()].ExceptionTable = BufferBegin;
-      uint8_t *EhStart;
-      FrameRegister = DE->EmitDwarfTable(F, *this, FnStart, FnEnd, EhStart);
-
-      // If the buffer was large enough to hold the table then we are done.
-      if (CurBufferPtr != BufferEnd)
-        break;
-
-      // Try again with twice as much space.
-      ActualSize = (CurBufferPtr - BufferBegin) * 2;
-      MemMgr->deallocateExceptionTable(BufferBegin);
-    }
-    MemMgr->endExceptionTable(F.getFunction(), BufferBegin, CurBufferPtr,
-                              FrameRegister);
-    BufferBegin = SavedBufferBegin;
-    BufferEnd = SavedBufferEnd;
-    CurBufferPtr = SavedCurBufferPtr;
-
-    if (JITExceptionHandling) {
-      TheJIT->RegisterTable(F.getFunction(), FrameRegister);
-    }
-  }
-
   if (MMI)
     MMI->EndFunction();
 
@@ -1027,15 +982,10 @@ void JITEmitter::deallocateMemForFunction(const Function *F) {
     Emitted = EmittedFunctions.find(F);
   if (Emitted != EmittedFunctions.end()) {
     MemMgr->deallocateFunctionBody(Emitted->second.FunctionBody);
-    MemMgr->deallocateExceptionTable(Emitted->second.ExceptionTable);
     TheJIT->NotifyFreeingMachineCode(Emitted->second.Code);
 
     EmittedFunctions.erase(Emitted);
   }
-
-  if (JITExceptionHandling) {
-    TheJIT->DeregisterTable(F);
-  }
 }
 
 
diff --git a/contrib/llvm/lib/ExecutionEngine/JIT/JITMemoryManager.cpp b/contrib/llvm/lib/ExecutionEngine/JIT/JITMemoryManager.cpp
index 66aeb77..f58d31b 100644
--- a/contrib/llvm/lib/ExecutionEngine/JIT/JITMemoryManager.cpp
+++ b/contrib/llvm/lib/ExecutionEngine/JIT/JITMemoryManager.cpp
@@ -464,11 +464,15 @@ namespace {
 
     /// allocateCodeSection - Allocate memory for a code section.
     uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment,
-                                 unsigned SectionID) {
+                                 unsigned SectionID, StringRef SectionName) {
       // Grow the required block size to account for the block header
       Size += sizeof(*CurBlock);
 
-      // FIXME: Alignement handling.
+      // Alignment handling.
+      if (!Alignment)
+        Alignment = 16;
+      Size += Alignment - 1;
+
       FreeRangeHeader* candidateBlock = FreeMemoryList;
       FreeRangeHeader* head = FreeMemoryList;
       FreeRangeHeader* iter = head->Next;
@@ -500,39 +504,21 @@ namespace {
       FreeMemoryList = candidateBlock->AllocateBlock();
       // Release the memory at the end of this block that isn't needed.
       FreeMemoryList = CurBlock->TrimAllocationToSize(FreeMemoryList, Size);
-      return (uint8_t *)(CurBlock + 1);
+      uintptr_t unalignedAddr = (uintptr_t)CurBlock + sizeof(*CurBlock);
+      return (uint8_t*)RoundUpToAlignment((uint64_t)unalignedAddr, Alignment);
     }
 
     /// allocateDataSection - Allocate memory for a data section.
     uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment,
-                                 unsigned SectionID, bool IsReadOnly) {
+                                 unsigned SectionID, StringRef SectionName,
+                                 bool IsReadOnly) {
       return (uint8_t*)DataAllocator.Allocate(Size, Alignment);
     }
 
-    bool applyPermissions(std::string *ErrMsg) {
+    bool finalizeMemory(std::string *ErrMsg) {
       return false;
     }
 
-    /// startExceptionTable - Use startFunctionBody to allocate memory for the
-    /// function's exception table.
-    uint8_t* startExceptionTable(const Function* F, uintptr_t &ActualSize) {
-      return startFunctionBody(F, ActualSize);
-    }
-
-    /// endExceptionTable - The exception table of F is now allocated,
-    /// and takes the memory in the range [TableStart,TableEnd).
-    void endExceptionTable(const Function *F, uint8_t *TableStart,
-                           uint8_t *TableEnd, uint8_t* FrameRegister) {
-      assert(TableEnd > TableStart);
-      assert(TableStart == (uint8_t *)(CurBlock+1) &&
-             "Mismatched table start/end!");
-
-      uintptr_t BlockSize = TableEnd - (uint8_t *)CurBlock;
-
-      // Release the memory at the end of this block that isn't needed.
-      FreeMemoryList =CurBlock->TrimAllocationToSize(FreeMemoryList, BlockSize);
-    }
-
     uint8_t *getGOTBase() const {
       return GOTBase;
     }
@@ -557,12 +543,6 @@ namespace {
       if (Body) deallocateBlock(Body);
     }
 
-    /// deallocateExceptionTable - Deallocate memory for the specified
-    /// exception table.
-    void deallocateExceptionTable(void *ET) {
-      if (ET) deallocateBlock(ET);
-    }
-
     /// setMemoryWritable - When code generation is in progress,
     /// the code pages may need permissions changed.
     void setMemoryWritable()
@@ -814,7 +794,7 @@ static void runAtExitHandlers() {
 // not inlined, and hiding their real definitions in a separate archive file
 // that the dynamic linker can't see. For more info, search for
 // 'libc_nonshared.a' on Google, or read http://llvm.org/PR274.
-#if defined(__linux__)
+#if defined(__linux__) && defined(__GLIBC__)
 /* stat functions are redirecting to __xstat with a version number.  On x86-64
  * linking with libc_nonshared.a and -Wl,--export-dynamic doesn't make 'stat'
  * available as an exported symbol, so we have to add it explicitly.