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, 125 insertions, 185 deletions

diff --git a/contrib/llvm/lib/MC/MCAsmStreamer.cpp b/contrib/llvm/lib/MC/MCAsmStreamer.cpp
index 9e86785..ca49f8f 100644
--- a/contrib/llvm/lib/MC/MCAsmStreamer.cpp
+++ b/contrib/llvm/lib/MC/MCAsmStreamer.cpp
@@ -25,11 +25,12 @@
 #include "llvm/MC/MCSectionCOFF.h"
 #include "llvm/MC/MCSectionMachO.h"
 #include "llvm/MC/MCSymbol.h"
+#include "llvm/Support/CommandLine.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/Format.h"
 #include "llvm/Support/FormattedStream.h"
 #include "llvm/Support/MathExtras.h"
-#include "llvm/Support/PathV2.h"
+#include "llvm/Support/Path.h"
 #include <cctype>
 using namespace llvm;
 
@@ -38,7 +39,7 @@ namespace {
 class MCAsmStreamer : public MCStreamer {
 protected:
   formatted_raw_ostream &OS;
-  const MCAsmInfo &MAI;
+  const MCAsmInfo *MAI;
 private:
   OwningPtr<MCInstPrinter> InstPrinter;
   OwningPtr<MCCodeEmitter> Emitter;
@@ -65,17 +66,15 @@ private:
   virtual void EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame);
 
 public:
-  MCAsmStreamer(MCContext &Context, formatted_raw_ostream &os,
-                bool isVerboseAsm, bool useLoc, bool useCFI,
-                bool useDwarfDirectory,
-                MCInstPrinter *printer, MCCodeEmitter *emitter,
-                MCAsmBackend *asmbackend,
-                bool showInst)
-    : MCStreamer(SK_AsmStreamer, Context), OS(os), MAI(Context.getAsmInfo()),
-      InstPrinter(printer), Emitter(emitter), AsmBackend(asmbackend),
-      CommentStream(CommentToEmit), IsVerboseAsm(isVerboseAsm),
-      ShowInst(showInst), UseLoc(useLoc), UseCFI(useCFI),
-      UseDwarfDirectory(useDwarfDirectory) {
+  MCAsmStreamer(MCContext &Context, MCTargetStreamer *TargetStreamer,
+                formatted_raw_ostream &os, bool isVerboseAsm, bool useLoc,
+                bool useCFI, bool useDwarfDirectory, MCInstPrinter *printer,
+                MCCodeEmitter *emitter, MCAsmBackend *asmbackend, bool showInst)
+      : MCStreamer(Context, TargetStreamer), OS(os), MAI(Context.getAsmInfo()),
+        InstPrinter(printer), Emitter(emitter), AsmBackend(asmbackend),
+        CommentStream(CommentToEmit), IsVerboseAsm(isVerboseAsm),
+        ShowInst(showInst), UseLoc(useLoc), UseCFI(useCFI),
+        UseDwarfDirectory(useDwarfDirectory) {
     if (InstPrinter && IsVerboseAsm)
       InstPrinter->setCommentStream(CommentStream);
   }
@@ -154,7 +153,7 @@ public:
   virtual void EmitDwarfAdvanceFrameAddr(const MCSymbol *LastLabel,
                                          const MCSymbol *Label);
 
-  virtual void EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute);
+  virtual bool EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute);
 
   virtual void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue);
   virtual void BeginCOFFSymbolDef(const MCSymbol *Symbol);
@@ -180,12 +179,10 @@ public:
   virtual void EmitTBSSSymbol (const MCSection *Section, MCSymbol *Symbol,
                                uint64_t Size, unsigned ByteAlignment = 0);
 
-  virtual void EmitBytes(StringRef Data, unsigned AddrSpace);
+  virtual void EmitBytes(StringRef Data);
 
-  virtual void EmitValueImpl(const MCExpr *Value, unsigned Size,
-                             unsigned AddrSpace);
-  virtual void EmitIntValue(uint64_t Value, unsigned Size,
-                            unsigned AddrSpace = 0);
+  virtual void EmitValueImpl(const MCExpr *Value, unsigned Size);
+  virtual void EmitIntValue(uint64_t Value, unsigned Size);
 
   virtual void EmitULEB128Value(const MCExpr *Value);
 
@@ -196,8 +193,7 @@ public:
   virtual void EmitGPRel32Value(const MCExpr *Value);
 
 
-  virtual void EmitFill(uint64_t NumBytes, uint8_t FillValue,
-                        unsigned AddrSpace);
+  virtual void EmitFill(uint64_t NumBytes, uint8_t FillValue);
 
   virtual void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value = 0,
                                     unsigned ValueSize = 1,
@@ -217,6 +213,7 @@ public:
                                      unsigned Isa, unsigned Discriminator,
                                      StringRef FileName);
 
+  virtual void EmitIdent(StringRef IdentString);
   virtual void EmitCFISections(bool EH, bool Debug);
   virtual void EmitCFIDefCfa(int64_t Register, int64_t Offset);
   virtual void EmitCFIDefCfaOffset(int64_t Offset);
@@ -232,6 +229,7 @@ public:
   virtual void EmitCFISignalFrame();
   virtual void EmitCFIUndefined(int64_t Register);
   virtual void EmitCFIRegister(int64_t Register1, int64_t Register2);
+  virtual void EmitCFIWindowSave();
 
   virtual void EmitWin64EHStartProc(const MCSymbol *Symbol);
   virtual void EmitWin64EHEndProc();
@@ -248,17 +246,6 @@ public:
   virtual void EmitWin64EHPushFrame(bool Code);
   virtual void EmitWin64EHEndProlog();
 
-  virtual void EmitFnStart();
-  virtual void EmitFnEnd();
-  virtual void EmitCantUnwind();
-  virtual void EmitPersonality(const MCSymbol *Personality);
-  virtual void EmitHandlerData();
-  virtual void EmitSetFP(unsigned FpReg, unsigned SpReg, int64_t Offset = 0);
-  virtual void EmitPad(int64_t Offset);
-  virtual void EmitRegSave(const SmallVectorImpl<unsigned> &RegList, bool);
-
-  virtual void EmitTCEntry(const MCSymbol &S);
-
   virtual void EmitInstruction(const MCInst &Inst);
 
   virtual void EmitBundleAlignMode(unsigned AlignPow2);
@@ -268,15 +255,9 @@ public:
   /// EmitRawText - If this file is backed by an assembly streamer, this dumps
   /// the specified string in the output .s file.  This capability is
   /// indicated by the hasRawTextSupport() predicate.
-  virtual void EmitRawText(StringRef String);
+  virtual void EmitRawTextImpl(StringRef String);
 
   virtual void FinishImpl();
-
-  /// @}
-
-  static bool classof(const MCStreamer *S) {
-    return S->getKind() == SK_AsmStreamer;
-  }
 };
 
 } // end anonymous namespace.
@@ -312,9 +293,9 @@ void MCAsmStreamer::EmitCommentsAndEOL() {
          "Comment array not newline terminated");
   do {
     // Emit a line of comments.
-    OS.PadToColumn(MAI.getCommentColumn());
+    OS.PadToColumn(MAI->getCommentColumn());
     size_t Position = Comments.find('\n');
-    OS << MAI.getCommentString() << ' ' << Comments.substr(0, Position) << '\n';
+    OS << MAI->getCommentString() << ' ' << Comments.substr(0, Position) <<'\n';
 
     Comments = Comments.substr(Position+1);
   } while (!Comments.empty());
@@ -332,7 +313,7 @@ static inline int64_t truncateToSize(int64_t Value, unsigned Bytes) {
 void MCAsmStreamer::ChangeSection(const MCSection *Section,
                                   const MCExpr *Subsection) {
   assert(Section && "Cannot switch to a null section!");
-  Section->PrintSwitchToSection(MAI, OS, Subsection);
+  Section->PrintSwitchToSection(*MAI, OS, Subsection);
 }
 
 void MCAsmStreamer::EmitEHSymAttributes(const MCSymbol *Symbol,
@@ -354,7 +335,7 @@ void MCAsmStreamer::EmitLabel(MCSymbol *Symbol) {
   assert(Symbol->isUndefined() && "Cannot define a symbol twice!");
   MCStreamer::EmitLabel(Symbol);
 
-  OS << *Symbol << MAI.getLabelSuffix();
+  OS << *Symbol << MAI->getLabelSuffix();
   EmitEOL();
 }
 
@@ -362,7 +343,7 @@ void MCAsmStreamer::EmitDebugLabel(MCSymbol *Symbol) {
   assert(Symbol->isUndefined() && "Cannot define a symbol twice!");
   MCStreamer::EmitDebugLabel(Symbol);
 
-  OS << *Symbol << MAI.getDebugLabelSuffix();
+  OS << *Symbol << MAI->getDebugLabelSuffix();
   EmitEOL();
 }
 
@@ -370,9 +351,9 @@ void MCAsmStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {
   switch (Flag) {
   case MCAF_SyntaxUnified:         OS << "\t.syntax unified"; break;
   case MCAF_SubsectionsViaSymbols: OS << ".subsections_via_symbols"; break;
-  case MCAF_Code16:                OS << '\t'<< MAI.getCode16Directive(); break;
-  case MCAF_Code32:                OS << '\t'<< MAI.getCode32Directive(); break;
-  case MCAF_Code64:                OS << '\t'<< MAI.getCode64Directive(); break;
+  case MCAF_Code16:                OS << '\t'<< MAI->getCode16Directive();break;
+  case MCAF_Code32:                OS << '\t'<< MAI->getCode32Directive();break;
+  case MCAF_Code64:                OS << '\t'<< MAI->getCode64Directive();break;
   }
   EmitEOL();
 }
@@ -388,9 +369,7 @@ void MCAsmStreamer::EmitLinkerOptions(ArrayRef<std::string> Options) {
 }
 
 void MCAsmStreamer::EmitDataRegion(MCDataRegionType Kind) {
-  MCContext &Ctx = getContext();
-  const MCAsmInfo &MAI = Ctx.getAsmInfo();
-  if (!MAI.doesSupportDataRegionDirectives())
+  if (!MAI->doesSupportDataRegionDirectives())
     return;
   switch (Kind) {
   case MCDR_DataRegion:            OS << "\t.data_region"; break;
@@ -407,7 +386,7 @@ void MCAsmStreamer::EmitThumbFunc(MCSymbol *Func) {
   // MCSymbols when they have spaces in them.
   OS << "\t.thumb_func";
   // Only Mach-O hasSubsectionsViaSymbols()
-  if (MAI.hasSubsectionsViaSymbols())
+  if (MAI->hasSubsectionsViaSymbols())
     OS << '\t' << *Func;
   EmitEOL();
 }
@@ -441,7 +420,7 @@ void MCAsmStreamer::EmitDwarfAdvanceFrameAddr(const MCSymbol *LastLabel,
 }
 
 
-void MCAsmStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
+bool MCAsmStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
                                         MCSymbolAttr Attribute) {
   switch (Attribute) {
   case MCSA_Invalid: llvm_unreachable("Invalid symbol attribute");
@@ -452,11 +431,12 @@ void MCAsmStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
   case MCSA_ELF_TypeCommon:      /// .type _foo, STT_COMMON  # aka @common
   case MCSA_ELF_TypeNoType:      /// .type _foo, STT_NOTYPE  # aka @notype
   case MCSA_ELF_TypeGnuUniqueObject:  /// .type _foo, @gnu_unique_object
-    assert(MAI.hasDotTypeDotSizeDirective() && "Symbol Attr not supported");
+    if (!MAI->hasDotTypeDotSizeDirective())
+      return false; // Symbol attribute not supported
     OS << "\t.type\t" << *Symbol << ','
-       << ((MAI.getCommentString()[0] != '@') ? '@' : '%');
+       << ((MAI->getCommentString()[0] != '@') ? '@' : '%');
     switch (Attribute) {
-    default: llvm_unreachable("Unknown ELF .type");
+    default: return false;
     case MCSA_ELF_TypeFunction:    OS << "function"; break;
     case MCSA_ELF_TypeIndFunction: OS << "gnu_indirect_function"; break;
     case MCSA_ELF_TypeObject:      OS << "object"; break;
@@ -466,9 +446,9 @@ void MCAsmStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
     case MCSA_ELF_TypeGnuUniqueObject: OS << "gnu_unique_object"; break;
     }
     EmitEOL();
-    return;
+    return true;
   case MCSA_Global: // .globl/.global
-    OS << MAI.getGlobalDirective();
+    OS << MAI->getGlobalDirective();
     FlagMap[Symbol] |= EHGlobal;
     break;
   case MCSA_Hidden:         OS << "\t.hidden\t";          break;
@@ -490,12 +470,14 @@ void MCAsmStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
     FlagMap[Symbol] |= EHWeakDefinition;
     break;
       // .weak_reference
-  case MCSA_WeakReference:  OS << MAI.getWeakRefDirective(); break;
+  case MCSA_WeakReference:  OS << MAI->getWeakRefDirective(); break;
   case MCSA_WeakDefAutoPrivate: OS << "\t.weak_def_can_be_hidden\t"; break;
   }
 
   OS << *Symbol;
   EmitEOL();
+
+  return true;
 }
 
 void MCAsmStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {
@@ -529,15 +511,18 @@ void MCAsmStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
 }
 
 void MCAsmStreamer::EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) {
-  assert(MAI.hasDotTypeDotSizeDirective());
+  assert(MAI->hasDotTypeDotSizeDirective());
   OS << "\t.size\t" << *Symbol << ", " << *Value << '\n';
 }
 
 void MCAsmStreamer::EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
                                      unsigned ByteAlignment) {
+  // Common symbols do not belong to any actual section.
+  AssignSection(Symbol, NULL);
+
   OS << "\t.comm\t" << *Symbol << ',' << Size;
   if (ByteAlignment != 0) {
-    if (MAI.getCOMMDirectiveAlignmentIsInBytes())
+    if (MAI->getCOMMDirectiveAlignmentIsInBytes())
       OS << ',' << ByteAlignment;
     else
       OS << ',' << Log2_32(ByteAlignment);
@@ -551,9 +536,12 @@ void MCAsmStreamer::EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
 /// @param Size - The size of the common symbol.
 void MCAsmStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
                                           unsigned ByteAlign) {
+  // Common symbols do not belong to any actual section.
+  AssignSection(Symbol, NULL);
+
   OS << "\t.lcomm\t" << *Symbol << ',' << Size;
   if (ByteAlign > 1) {
-    switch (MAI.getLCOMMDirectiveAlignmentType()) {
+    switch (MAI->getLCOMMDirectiveAlignmentType()) {
     case LCOMM::NoAlignment:
       llvm_unreachable("alignment not supported on .lcomm!");
     case LCOMM::ByteAlignment:
@@ -570,6 +558,9 @@ void MCAsmStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
 
 void MCAsmStreamer::EmitZerofill(const MCSection *Section, MCSymbol *Symbol,
                                  uint64_t Size, unsigned ByteAlignment) {
+  if (Symbol)
+    AssignSection(Symbol, Section);
+
   // Note: a .zerofill directive does not switch sections.
   OS << ".zerofill ";
 
@@ -590,6 +581,8 @@ void MCAsmStreamer::EmitZerofill(const MCSection *Section, MCSymbol *Symbol,
 // e.g. _a.
 void MCAsmStreamer::EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol,
                                    uint64_t Size, unsigned ByteAlignment) {
+  AssignSection(Symbol, Section);
+
   assert(Symbol != NULL && "Symbol shouldn't be NULL!");
   // Instead of using the Section we'll just use the shortcut.
   // This is a mach-o specific directive and section.
@@ -638,13 +631,13 @@ static void PrintQuotedString(StringRef Data, raw_ostream &OS) {
 }
 
 
-void MCAsmStreamer::EmitBytes(StringRef Data, unsigned AddrSpace) {
+void MCAsmStreamer::EmitBytes(StringRef Data) {
   assert(getCurrentSection().first &&
          "Cannot emit contents before setting section!");
   if (Data.empty()) return;
 
   if (Data.size() == 1) {
-    OS << MAI.getData8bitsDirective(AddrSpace);
+    OS << MAI->getData8bitsDirective();
     OS << (unsigned)(unsigned char)Data[0];
     EmitEOL();
     return;
@@ -652,46 +645,43 @@ void MCAsmStreamer::EmitBytes(StringRef Data, unsigned AddrSpace) {
 
   // If the data ends with 0 and the target supports .asciz, use it, otherwise
   // use .ascii
-  if (MAI.getAscizDirective() && Data.back() == 0) {
-    OS << MAI.getAscizDirective();
+  if (MAI->getAscizDirective() && Data.back() == 0) {
+    OS << MAI->getAscizDirective();
     Data = Data.substr(0, Data.size()-1);
   } else {
-    OS << MAI.getAsciiDirective();
+    OS << MAI->getAsciiDirective();
   }
 
-  OS << ' ';
   PrintQuotedString(Data, OS);
   EmitEOL();
 }
 
-void MCAsmStreamer::EmitIntValue(uint64_t Value, unsigned Size,
-                                 unsigned AddrSpace) {
-  EmitValue(MCConstantExpr::Create(Value, getContext()), Size, AddrSpace);
+void MCAsmStreamer::EmitIntValue(uint64_t Value, unsigned Size) {
+  EmitValue(MCConstantExpr::Create(Value, getContext()), Size);
 }
 
-void MCAsmStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size,
-                                  unsigned AddrSpace) {
+void MCAsmStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size) {
   assert(getCurrentSection().first &&
          "Cannot emit contents before setting section!");
   const char *Directive = 0;
   switch (Size) {
   default: break;
-  case 1: Directive = MAI.getData8bitsDirective(AddrSpace); break;
-  case 2: Directive = MAI.getData16bitsDirective(AddrSpace); break;
-  case 4: Directive = MAI.getData32bitsDirective(AddrSpace); break;
+  case 1: Directive = MAI->getData8bitsDirective();  break;
+  case 2: Directive = MAI->getData16bitsDirective(); break;
+  case 4: Directive = MAI->getData32bitsDirective(); break;
   case 8:
-    Directive = MAI.getData64bitsDirective(AddrSpace);
+    Directive = MAI->getData64bitsDirective();
     // If the target doesn't support 64-bit data, emit as two 32-bit halves.
     if (Directive) break;
     int64_t IntValue;
     if (!Value->EvaluateAsAbsolute(IntValue))
       report_fatal_error("Don't know how to emit this value.");
-    if (getContext().getAsmInfo().isLittleEndian()) {
-      EmitIntValue((uint32_t)(IntValue >> 0 ), 4, AddrSpace);
-      EmitIntValue((uint32_t)(IntValue >> 32), 4, AddrSpace);
+    if (MAI->isLittleEndian()) {
+      EmitIntValue((uint32_t)(IntValue >> 0 ), 4);
+      EmitIntValue((uint32_t)(IntValue >> 32), 4);
     } else {
-      EmitIntValue((uint32_t)(IntValue >> 32), 4, AddrSpace);
-      EmitIntValue((uint32_t)(IntValue >> 0 ), 4, AddrSpace);
+      EmitIntValue((uint32_t)(IntValue >> 32), 4);
+      EmitIntValue((uint32_t)(IntValue >> 0 ), 4);
     }
     return;
   }
@@ -707,7 +697,7 @@ void MCAsmStreamer::EmitULEB128Value(const MCExpr *Value) {
     EmitULEB128IntValue(IntValue);
     return;
   }
-  assert(MAI.hasLEB128() && "Cannot print a .uleb");
+  assert(MAI->hasLEB128() && "Cannot print a .uleb");
   OS << ".uleb128 " << *Value;
   EmitEOL();
 }
@@ -718,41 +708,39 @@ void MCAsmStreamer::EmitSLEB128Value(const MCExpr *Value) {
     EmitSLEB128IntValue(IntValue);
     return;
   }
-  assert(MAI.hasLEB128() && "Cannot print a .sleb");
+  assert(MAI->hasLEB128() && "Cannot print a .sleb");
   OS << ".sleb128 " << *Value;
   EmitEOL();
 }
 
 void MCAsmStreamer::EmitGPRel64Value(const MCExpr *Value) {
-  assert(MAI.getGPRel64Directive() != 0);
-  OS << MAI.getGPRel64Directive() << *Value;
+  assert(MAI->getGPRel64Directive() != 0);
+  OS << MAI->getGPRel64Directive() << *Value;
   EmitEOL();
 }
 
 void MCAsmStreamer::EmitGPRel32Value(const MCExpr *Value) {
-  assert(MAI.getGPRel32Directive() != 0);
-  OS << MAI.getGPRel32Directive() << *Value;
+  assert(MAI->getGPRel32Directive() != 0);
+  OS << MAI->getGPRel32Directive() << *Value;
   EmitEOL();
 }
 
 
 /// EmitFill - Emit NumBytes bytes worth of the value specified by
 /// FillValue.  This implements directives such as '.space'.
-void MCAsmStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue,
-                             unsigned AddrSpace) {
+void MCAsmStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue) {
   if (NumBytes == 0) return;
 
-  if (AddrSpace == 0)
-    if (const char *ZeroDirective = MAI.getZeroDirective()) {
-      OS << ZeroDirective << NumBytes;
-      if (FillValue != 0)
-        OS << ',' << (int)FillValue;
-      EmitEOL();
-      return;
-    }
+  if (const char *ZeroDirective = MAI->getZeroDirective()) {
+    OS << ZeroDirective << NumBytes;
+    if (FillValue != 0)
+      OS << ',' << (int)FillValue;
+    EmitEOL();
+    return;
+  }
 
   // Emit a byte at a time.
-  MCStreamer::EmitFill(NumBytes, FillValue, AddrSpace);
+  MCStreamer::EmitFill(NumBytes, FillValue);
 }
 
 void MCAsmStreamer::EmitValueToAlignment(unsigned ByteAlignment, int64_t Value,
@@ -763,14 +751,14 @@ void MCAsmStreamer::EmitValueToAlignment(unsigned ByteAlignment, int64_t Value,
   if (isPowerOf2_32(ByteAlignment)) {
     switch (ValueSize) {
     default: llvm_unreachable("Invalid size for machine code value!");
-    case 1: OS << MAI.getAlignDirective(); break;
+    case 1: OS << MAI->getAlignDirective(); break;
     // FIXME: use MAI for this!
     case 2: OS << ".p2alignw "; break;
     case 4: OS << ".p2alignl "; break;
     case 8: llvm_unreachable("Unsupported alignment size!");
     }
 
-    if (MAI.getAlignmentIsInBytes())
+    if (MAI->getAlignmentIsInBytes())
       OS << ByteAlignment;
     else
       OS << Log2_32(ByteAlignment);
@@ -806,7 +794,7 @@ void MCAsmStreamer::EmitValueToAlignment(unsigned ByteAlignment, int64_t Value,
 void MCAsmStreamer::EmitCodeAlignment(unsigned ByteAlignment,
                                       unsigned MaxBytesToEmit) {
   // Emit with a text fill value.
-  EmitValueToAlignment(ByteAlignment, MAI.getTextAlignFillValue(),
+  EmitValueToAlignment(ByteAlignment, MAI->getTextAlignFillValue(),
                        1, MaxBytesToEmit);
 }
 
@@ -820,7 +808,7 @@ bool MCAsmStreamer::EmitValueToOffset(const MCExpr *Offset,
 
 
 void MCAsmStreamer::EmitFileDirective(StringRef Filename) {
-  assert(MAI.hasSingleParameterDotFile());
+  assert(MAI->hasSingleParameterDotFile());
   OS << "\t.file\t";
   PrintQuotedString(Filename, OS);
   EmitEOL();
@@ -886,13 +874,20 @@ void MCAsmStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
     OS << "discriminator " << Discriminator;
 
   if (IsVerboseAsm) {
-    OS.PadToColumn(MAI.getCommentColumn());
-    OS << MAI.getCommentString() << ' ' << FileName << ':'
+    OS.PadToColumn(MAI->getCommentColumn());
+    OS << MAI->getCommentString() << ' ' << FileName << ':'
        << Line << ':' << Column;
   }
   EmitEOL();
 }
 
+void MCAsmStreamer::EmitIdent(StringRef IdentString) {
+  assert(MAI->hasIdentDirective() && ".ident directive not supported");
+  OS << "\t.ident\t";
+  PrintQuotedString(IdentString, OS);
+  EmitEOL();
+}
+
 void MCAsmStreamer::EmitCFISections(bool EH, bool Debug) {
   MCStreamer::EmitCFISections(EH, Debug);
 
@@ -936,9 +931,9 @@ void MCAsmStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
 }
 
 void MCAsmStreamer::EmitRegisterName(int64_t Register) {
-  if (InstPrinter && !MAI.useDwarfRegNumForCFI()) {
-    const MCRegisterInfo &MRI = getContext().getRegisterInfo();
-    unsigned LLVMRegister = MRI.getLLVMRegNum(Register, true);
+  if (InstPrinter && !MAI->useDwarfRegNumForCFI()) {
+    const MCRegisterInfo *MRI = getContext().getRegisterInfo();
+    unsigned LLVMRegister = MRI->getLLVMRegNum(Register, true);
     InstPrinter->printRegName(OS, LLVMRegister);
   } else {
     OS << Register;
@@ -1094,6 +1089,16 @@ void MCAsmStreamer::EmitCFIRegister(int64_t Register1, int64_t Register2) {
   EmitEOL();
 }
 
+void MCAsmStreamer::EmitCFIWindowSave() {
+  MCStreamer::EmitCFIWindowSave();
+
+  if (!UseCFI)
+    return;
+
+  OS << "\t.cfi_window_save";
+  EmitEOL();
+}
+
 void MCAsmStreamer::EmitWin64EHStartProc(const MCSymbol *Symbol) {
   MCStreamer::EmitWin64EHStartProc(Symbol);
 
@@ -1276,7 +1281,7 @@ void MCAsmStreamer::AddEncodingComment(const MCInst &Inst) {
         unsigned Bit = (Code[i] >> j) & 1;
 
         unsigned FixupBit;
-        if (getContext().getAsmInfo().isLittleEndian())
+        if (MAI->isLittleEndian())
           FixupBit = i * 8 + j;
         else
           FixupBit = i * 8 + (7-j);
@@ -1299,73 +1304,6 @@ void MCAsmStreamer::AddEncodingComment(const MCInst &Inst) {
   }
 }
 
-void MCAsmStreamer::EmitFnStart() {
-  OS << "\t.fnstart";
-  EmitEOL();
-}
-
-void MCAsmStreamer::EmitFnEnd() {
-  OS << "\t.fnend";
-  EmitEOL();
-}
-
-void MCAsmStreamer::EmitCantUnwind() {
-  OS << "\t.cantunwind";
-  EmitEOL();
-}
-
-void MCAsmStreamer::EmitHandlerData() {
-  OS << "\t.handlerdata";
-  EmitEOL();
-}
-
-void MCAsmStreamer::EmitPersonality(const MCSymbol *Personality) {
-  OS << "\t.personality " << Personality->getName();
-  EmitEOL();
-}
-
-void MCAsmStreamer::EmitSetFP(unsigned FpReg, unsigned SpReg, int64_t Offset) {
-  OS << "\t.setfp\t";
-  InstPrinter->printRegName(OS, FpReg);
-  OS << ", ";
-  InstPrinter->printRegName(OS, SpReg);
-  if (Offset)
-    OS << ", #" << Offset;
-  EmitEOL();
-}
-
-void MCAsmStreamer::EmitPad(int64_t Offset) {
-  OS << "\t.pad\t#" << Offset;
-  EmitEOL();
-}
-
-void MCAsmStreamer::EmitRegSave(const SmallVectorImpl<unsigned> &RegList,
-                                bool isVector) {
-  assert(RegList.size() && "RegList should not be empty");
-  if (isVector)
-    OS << "\t.vsave\t{";
-  else
-    OS << "\t.save\t{";
-
-  InstPrinter->printRegName(OS, RegList[0]);
-
-  for (unsigned i = 1, e = RegList.size(); i != e; ++i) {
-    OS << ", ";
-    InstPrinter->printRegName(OS, RegList[i]);
-  }
-
-  OS << "}";
-  EmitEOL();
-}
-
-void MCAsmStreamer::EmitTCEntry(const MCSymbol &S) {
-  OS << "\t.tc ";
-  OS << S.getName();
-  OS << "[TC],";
-  OS << S.getName();
-  EmitEOL();
-}
-
 void MCAsmStreamer::EmitInstruction(const MCInst &Inst) {
   assert(getCurrentSection().first &&
          "Cannot emit contents before setting section!");
@@ -1376,7 +1314,7 @@ void MCAsmStreamer::EmitInstruction(const MCInst &Inst) {
 
   // Show the MCInst if enabled.
   if (ShowInst) {
-    Inst.dump_pretty(GetCommentOS(), &MAI, InstPrinter.get(), "\n ");
+    Inst.dump_pretty(GetCommentOS(), MAI, InstPrinter.get(), "\n ");
     GetCommentOS() << "\n";
   }
 
@@ -1384,7 +1322,7 @@ void MCAsmStreamer::EmitInstruction(const MCInst &Inst) {
   if (InstPrinter)
     InstPrinter->printInst(&Inst, OS, "");
   else
-    Inst.print(OS, &MAI);
+    Inst.print(OS, MAI);
   EmitEOL();
 }
 
@@ -1408,7 +1346,7 @@ void MCAsmStreamer::EmitBundleUnlock() {
 /// EmitRawText - If this file is backed by an assembly streamer, this dumps
 /// the specified string in the output .s file.  This capability is
 /// indicated by the hasRawTextSupport() predicate.
-void MCAsmStreamer::EmitRawText(StringRef String) {
+void MCAsmStreamer::EmitRawTextImpl(StringRef String) {
   if (!String.empty() && String.back() == '\n')
     String = String.substr(0, String.size()-1);
   OS << String;
@@ -1427,14 +1365,16 @@ void MCAsmStreamer::FinishImpl() {
     MCGenDwarfInfo::Emit(this, LineSectionSymbol);
 
   if (!UseCFI)
-    EmitFrames(false);
+    EmitFrames(AsmBackend.get(), false);
 }
+
 MCStreamer *llvm::createAsmStreamer(MCContext &Context,
+                                    MCTargetStreamer *TargetStreamer,
                                     formatted_raw_ostream &OS,
-                                    bool isVerboseAsm, bool useLoc,
-                                    bool useCFI, bool useDwarfDirectory,
-                                    MCInstPrinter *IP, MCCodeEmitter *CE,
-                                    MCAsmBackend *MAB, bool ShowInst) {
-  return new MCAsmStreamer(Context, OS, isVerboseAsm, useLoc, useCFI,
-                           useDwarfDirectory, IP, CE, MAB, ShowInst);
+                                    bool isVerboseAsm, bool useLoc, bool useCFI,
+                                    bool useDwarfDirectory, MCInstPrinter *IP,
+                                    MCCodeEmitter *CE, MCAsmBackend *MAB,
+                                    bool ShowInst) {
+  return new MCAsmStreamer(Context, TargetStreamer, OS, isVerboseAsm, useLoc,
+                           useCFI, useDwarfDirectory, IP, CE, MAB, ShowInst);
 }