Import LLVM, at r72732.

7 files changed, 2076 insertions, 0 deletions

diff --git a/lib/Target/X86/AsmPrinter/CMakeLists.txt b/lib/Target/X86/AsmPrinter/CMakeLists.txt
new file mode 100644
index 0000000..dbd03d8
--- /dev/null
+++ b/lib/Target/X86/AsmPrinter/CMakeLists.txt
@@ -0,0 +1,11 @@
+include_directories( ${CMAKE_CURRENT_BINARY_DIR}/.. ${CMAKE_CURRENT_SOURCE_DIR}/.. )
+
+add_partially_linked_object(LLVMX86AsmPrinter
+  X86ATTAsmPrinter.cpp
+  X86AsmPrinter.cpp
+  X86IntelAsmPrinter.cpp
+  )
+
+target_name_of_partially_linked_object(LLVMX86CodeGen n)
+
+add_dependencies(LLVMX86AsmPrinter ${n})
diff --git a/lib/Target/X86/AsmPrinter/Makefile b/lib/Target/X86/AsmPrinter/Makefile
new file mode 100644
index 0000000..ba89ac6
--- /dev/null
+++ b/lib/Target/X86/AsmPrinter/Makefile
@@ -0,0 +1,15 @@
+##===- lib/Target/X86/Makefile -----------------------------*- Makefile -*-===##
+#
+#                     The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+#
+##===----------------------------------------------------------------------===##
+LEVEL = ../../../..
+LIBRARYNAME = LLVMX86AsmPrinter
+
+# Hack: we need to include 'main' x86 target directory to grab private headers
+CPPFLAGS = -I$(PROJ_OBJ_DIR)/.. -I$(PROJ_SRC_DIR)/..
+
+include $(LEVEL)/Makefile.common
diff --git a/lib/Target/X86/AsmPrinter/X86ATTAsmPrinter.cpp b/lib/Target/X86/AsmPrinter/X86ATTAsmPrinter.cpp
new file mode 100644
index 0000000..8afe2ea
--- /dev/null
+++ b/lib/Target/X86/AsmPrinter/X86ATTAsmPrinter.cpp
@@ -0,0 +1,1075 @@
+//===-- X86ATTAsmPrinter.cpp - Convert X86 LLVM code to AT&T assembly -----===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains a printer that converts from our internal representation
+// of machine-dependent LLVM code to AT&T format assembly
+// language. This printer is the output mechanism used by `llc'.
+//
+//===----------------------------------------------------------------------===//
+
+#define DEBUG_TYPE "asm-printer"
+#include "X86ATTAsmPrinter.h"
+#include "X86.h"
+#include "X86COFF.h"
+#include "X86MachineFunctionInfo.h"
+#include "X86TargetMachine.h"
+#include "X86TargetAsmInfo.h"
+#include "llvm/CallingConv.h"
+#include "llvm/DerivedTypes.h"
+#include "llvm/Module.h"
+#include "llvm/Type.h"
+#include "llvm/ADT/Statistic.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/CodeGen/DwarfWriter.h"
+#include "llvm/CodeGen/MachineJumpTableInfo.h"
+#include "llvm/Support/Mangler.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/Target/TargetAsmInfo.h"
+#include "llvm/Target/TargetOptions.h"
+using namespace llvm;
+
+STATISTIC(EmittedInsts, "Number of machine instrs printed");
+
+static std::string getPICLabelString(unsigned FnNum,
+                                     const TargetAsmInfo *TAI,
+                                     const X86Subtarget* Subtarget) {
+  std::string label;
+  if (Subtarget->isTargetDarwin())
+    label =  "\"L" + utostr_32(FnNum) + "$pb\"";
+  else if (Subtarget->isTargetELF())
+    label = ".Lllvm$" + utostr_32(FnNum) + "." "$piclabel";
+  else
+    assert(0 && "Don't know how to print PIC label!\n");
+
+  return label;
+}
+
+static X86MachineFunctionInfo calculateFunctionInfo(const Function *F,
+                                                    const TargetData *TD) {
+  X86MachineFunctionInfo Info;
+  uint64_t Size = 0;
+
+  switch (F->getCallingConv()) {
+  case CallingConv::X86_StdCall:
+    Info.setDecorationStyle(StdCall);
+    break;
+  case CallingConv::X86_FastCall:
+    Info.setDecorationStyle(FastCall);
+    break;
+  default:
+    return Info;
+  }
+
+  unsigned argNum = 1;
+  for (Function::const_arg_iterator AI = F->arg_begin(), AE = F->arg_end();
+       AI != AE; ++AI, ++argNum) {
+    const Type* Ty = AI->getType();
+
+    // 'Dereference' type in case of byval parameter attribute
+    if (F->paramHasAttr(argNum, Attribute::ByVal))
+      Ty = cast<PointerType>(Ty)->getElementType();
+
+    // Size should be aligned to DWORD boundary
+    Size += ((TD->getTypeAllocSize(Ty) + 3)/4)*4;
+  }
+
+  // We're not supporting tooooo huge arguments :)
+  Info.setBytesToPopOnReturn((unsigned int)Size);
+  return Info;
+}
+
+/// PrintUnmangledNameSafely - Print out the printable characters in the name.
+/// Don't print things like \\n or \\0.
+static void PrintUnmangledNameSafely(const Value *V, raw_ostream &OS) {
+  for (const char *Name = V->getNameStart(), *E = Name+V->getNameLen();
+       Name != E; ++Name)
+    if (isprint(*Name))
+      OS << *Name;
+}
+
+/// decorateName - Query FunctionInfoMap and use this information for various
+/// name decoration.
+void X86ATTAsmPrinter::decorateName(std::string &Name,
+                                    const GlobalValue *GV) {
+  const Function *F = dyn_cast<Function>(GV);
+  if (!F) return;
+
+  // We don't want to decorate non-stdcall or non-fastcall functions right now
+  unsigned CC = F->getCallingConv();
+  if (CC != CallingConv::X86_StdCall && CC != CallingConv::X86_FastCall)
+    return;
+
+  // Decorate names only when we're targeting Cygwin/Mingw32 targets
+  if (!Subtarget->isTargetCygMing())
+    return;
+
+  FMFInfoMap::const_iterator info_item = FunctionInfoMap.find(F);
+
+  const X86MachineFunctionInfo *Info;
+  if (info_item == FunctionInfoMap.end()) {
+    // Calculate apropriate function info and populate map
+    FunctionInfoMap[F] = calculateFunctionInfo(F, TM.getTargetData());
+    Info = &FunctionInfoMap[F];
+  } else {
+    Info = &info_item->second;
+  }
+
+  const FunctionType *FT = F->getFunctionType();
+  switch (Info->getDecorationStyle()) {
+  case None:
+    break;
+  case StdCall:
+    // "Pure" variadic functions do not receive @0 suffix.
+    if (!FT->isVarArg() || (FT->getNumParams() == 0) ||
+        (FT->getNumParams() == 1 && F->hasStructRetAttr()))
+      Name += '@' + utostr_32(Info->getBytesToPopOnReturn());
+    break;
+  case FastCall:
+    // "Pure" variadic functions do not receive @0 suffix.
+    if (!FT->isVarArg() || (FT->getNumParams() == 0) ||
+        (FT->getNumParams() == 1 && F->hasStructRetAttr()))
+      Name += '@' + utostr_32(Info->getBytesToPopOnReturn());
+
+    if (Name[0] == '_') {
+      Name[0] = '@';
+    } else {
+      Name = '@' + Name;
+    }
+    break;
+  default:
+    assert(0 && "Unsupported DecorationStyle");
+  }
+}
+
+void X86ATTAsmPrinter::emitFunctionHeader(const MachineFunction &MF) {
+  const Function *F = MF.getFunction();
+
+  decorateName(CurrentFnName, F);
+
+  SwitchToSection(TAI->SectionForGlobal(F));
+
+  unsigned FnAlign = 4;
+  if (F->hasFnAttr(Attribute::OptimizeForSize))
+    FnAlign = 1;
+  switch (F->getLinkage()) {
+  default: assert(0 && "Unknown linkage type!");
+  case Function::InternalLinkage:  // Symbols default to internal.
+  case Function::PrivateLinkage:
+    EmitAlignment(FnAlign, F);
+    break;
+  case Function::DLLExportLinkage:
+  case Function::ExternalLinkage:
+    EmitAlignment(FnAlign, F);
+    O << "\t.globl\t" << CurrentFnName << '\n';
+    break;
+  case Function::LinkOnceAnyLinkage:
+  case Function::LinkOnceODRLinkage:
+  case Function::WeakAnyLinkage:
+  case Function::WeakODRLinkage:
+    EmitAlignment(FnAlign, F);
+    if (Subtarget->isTargetDarwin()) {
+      O << "\t.globl\t" << CurrentFnName << '\n';
+      O << TAI->getWeakDefDirective() << CurrentFnName << '\n';
+    } else if (Subtarget->isTargetCygMing()) {
+      O << "\t.globl\t" << CurrentFnName << "\n"
+           "\t.linkonce discard\n";
+    } else {
+      O << "\t.weak\t" << CurrentFnName << '\n';
+    }
+    break;
+  }
+
+  printVisibility(CurrentFnName, F->getVisibility());
+
+  if (Subtarget->isTargetELF())
+    O << "\t.type\t" << CurrentFnName << ",@function\n";
+  else if (Subtarget->isTargetCygMing()) {
+    O << "\t.def\t " << CurrentFnName
+      << ";\t.scl\t" <<
+      (F->hasInternalLinkage() ? COFF::C_STAT : COFF::C_EXT)
+      << ";\t.type\t" << (COFF::DT_FCN << COFF::N_BTSHFT)
+      << ";\t.endef\n";
+  }
+
+  O << CurrentFnName << ":\n";
+  // Add some workaround for linkonce linkage on Cygwin\MinGW
+  if (Subtarget->isTargetCygMing() &&
+      (F->hasLinkOnceLinkage() || F->hasWeakLinkage()))
+    O << "Lllvm$workaround$fake$stub$" << CurrentFnName << ":\n";
+}
+
+/// runOnMachineFunction - This uses the printMachineInstruction()
+/// method to print assembly for each instruction.
+///
+bool X86ATTAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
+  const Function *F = MF.getFunction();
+  this->MF = &MF;
+  unsigned CC = F->getCallingConv();
+
+  SetupMachineFunction(MF);
+  O << "\n\n";
+
+  // Populate function information map.  Actually, We don't want to populate
+  // non-stdcall or non-fastcall functions' information right now.
+  if (CC == CallingConv::X86_StdCall || CC == CallingConv::X86_FastCall)
+    FunctionInfoMap[F] = *MF.getInfo<X86MachineFunctionInfo>();
+
+  // Print out constants referenced by the function
+  EmitConstantPool(MF.getConstantPool());
+
+  if (F->hasDLLExportLinkage())
+    DLLExportedFns.insert(Mang->makeNameProper(F->getName(), ""));
+
+  // Print the 'header' of function
+  emitFunctionHeader(MF);
+
+  // Emit pre-function debug and/or EH information.
+  if (TAI->doesSupportDebugInformation() || TAI->doesSupportExceptionHandling())
+    DW->BeginFunction(&MF);
+
+  // Print out code for the function.
+  bool hasAnyRealCode = false;
+  for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
+       I != E; ++I) {
+    // Print a label for the basic block.
+    if (!VerboseAsm && (I->pred_empty() || I->isOnlyReachableByFallthrough())) {
+      // This is an entry block or a block that's only reachable via a
+      // fallthrough edge. In non-VerboseAsm mode, don't print the label.
+    } else {
+      printBasicBlockLabel(I, true, true, VerboseAsm);
+      O << '\n';
+    }
+    for (MachineBasicBlock::const_iterator II = I->begin(), IE = I->end();
+         II != IE; ++II) {
+      // Print the assembly for the instruction.
+      if (!II->isLabel())
+        hasAnyRealCode = true;
+      printMachineInstruction(II);
+    }
+  }
+
+  if (Subtarget->isTargetDarwin() && !hasAnyRealCode) {
+    // If the function is empty, then we need to emit *something*. Otherwise,
+    // the function's label might be associated with something that it wasn't
+    // meant to be associated with. We emit a noop in this situation.
+    // We are assuming inline asms are code.
+    O << "\tnop\n";
+  }
+
+  if (TAI->hasDotTypeDotSizeDirective())
+    O << "\t.size\t" << CurrentFnName << ", .-" << CurrentFnName << '\n';
+
+  // Emit post-function debug information.
+  if (TAI->doesSupportDebugInformation())
+    DW->EndFunction(&MF);
+
+  // Print out jump tables referenced by the function.
+  EmitJumpTableInfo(MF.getJumpTableInfo(), MF);
+
+  O.flush();
+
+  // We didn't modify anything.
+  return false;
+}
+
+static inline bool shouldPrintGOT(TargetMachine &TM, const X86Subtarget* ST) {
+  return ST->isPICStyleGOT() && TM.getRelocationModel() == Reloc::PIC_;
+}
+
+static inline bool shouldPrintPLT(TargetMachine &TM, const X86Subtarget* ST) {
+  return ST->isTargetELF() && TM.getRelocationModel() == Reloc::PIC_ &&
+      (ST->isPICStyleRIPRel() || ST->isPICStyleGOT());
+}
+
+static inline bool shouldPrintStub(TargetMachine &TM, const X86Subtarget* ST) {
+  return ST->isPICStyleStub() && TM.getRelocationModel() != Reloc::Static;
+}
+
+void X86ATTAsmPrinter::printOperand(const MachineInstr *MI, unsigned OpNo,
+                                    const char *Modifier, bool NotRIPRel) {
+  const MachineOperand &MO = MI->getOperand(OpNo);
+  switch (MO.getType()) {
+  case MachineOperand::MO_Register: {
+    assert(TargetRegisterInfo::isPhysicalRegister(MO.getReg()) &&
+           "Virtual registers should not make it this far!");
+    O << '%';
+    unsigned Reg = MO.getReg();
+    if (Modifier && strncmp(Modifier, "subreg", strlen("subreg")) == 0) {
+      MVT VT = (strcmp(Modifier+6,"64") == 0) ?
+        MVT::i64 : ((strcmp(Modifier+6, "32") == 0) ? MVT::i32 :
+                    ((strcmp(Modifier+6,"16") == 0) ? MVT::i16 : MVT::i8));
+      Reg = getX86SubSuperRegister(Reg, VT);
+    }
+    O << TRI->getAsmName(Reg);
+    return;
+  }
+
+  case MachineOperand::MO_Immediate:
+    if (!Modifier || (strcmp(Modifier, "debug") &&
+                      strcmp(Modifier, "mem") &&
+                      strcmp(Modifier, "call")))
+      O << '$';
+    O << MO.getImm();
+    return;
+  case MachineOperand::MO_MachineBasicBlock:
+    printBasicBlockLabel(MO.getMBB(), false, false, VerboseAsm);
+    return;
+  case MachineOperand::MO_JumpTableIndex: {
+    bool isMemOp  = Modifier && !strcmp(Modifier, "mem");
+    if (!isMemOp) O << '$';
+    O << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber() << '_'
+      << MO.getIndex();
+
+    if (TM.getRelocationModel() == Reloc::PIC_) {
+      if (Subtarget->isPICStyleStub())
+        O << "-\"" << TAI->getPrivateGlobalPrefix() << getFunctionNumber()
+          << "$pb\"";
+      else if (Subtarget->isPICStyleGOT())
+        O << "@GOTOFF";
+    }
+
+    if (isMemOp && Subtarget->isPICStyleRIPRel() && !NotRIPRel)
+      O << "(%rip)";
+    return;
+  }
+  case MachineOperand::MO_ConstantPoolIndex: {
+    bool isMemOp  = Modifier && !strcmp(Modifier, "mem");
+    if (!isMemOp) O << '$';
+    O << TAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << '_'
+      << MO.getIndex();
+
+    if (TM.getRelocationModel() == Reloc::PIC_) {
+      if (Subtarget->isPICStyleStub())
+        O << "-\"" << TAI->getPrivateGlobalPrefix() << getFunctionNumber()
+          << "$pb\"";
+      else if (Subtarget->isPICStyleGOT())
+        O << "@GOTOFF";
+    }
+
+    printOffset(MO.getOffset());
+
+    if (isMemOp && Subtarget->isPICStyleRIPRel() && !NotRIPRel)
+      O << "(%rip)";
+    return;
+  }
+  case MachineOperand::MO_GlobalAddress: {
+    bool isCallOp = Modifier && !strcmp(Modifier, "call");
+    bool isMemOp  = Modifier && !strcmp(Modifier, "mem");
+    bool needCloseParen = false;
+
+    const GlobalValue *GV = MO.getGlobal();
+    const GlobalVariable *GVar = dyn_cast<GlobalVariable>(GV);
+    if (!GVar) {
+      // If GV is an alias then use the aliasee for determining
+      // thread-localness.
+      if (const GlobalAlias *GA = dyn_cast<GlobalAlias>(GV))
+        GVar = dyn_cast_or_null<GlobalVariable>(GA->resolveAliasedGlobal(false));
+    }
+
+    bool isThreadLocal = GVar && GVar->isThreadLocal();
+
+    std::string Name = Mang->getValueName(GV);
+    decorateName(Name, GV);
+
+    if (!isMemOp && !isCallOp)
+      O << '$';
+    else if (Name[0] == '$') {
+      // The name begins with a dollar-sign. In order to avoid having it look
+      // like an integer immediate to the assembler, enclose it in parens.
+      O << '(';
+      needCloseParen = true;
+    }
+
+    if (shouldPrintStub(TM, Subtarget)) {
+      // Link-once, declaration, or Weakly-linked global variables need
+      // non-lazily-resolved stubs
+      if (GV->isDeclaration() || GV->isWeakForLinker()) {
+        // Dynamically-resolved functions need a stub for the function.
+        if (isCallOp && isa<Function>(GV)) {
+          // Function stubs are no longer needed for Mac OS X 10.5 and up.
+          if (Subtarget->isTargetDarwin() && Subtarget->getDarwinVers() >= 9) {
+            O << Name;
+          } else {
+            FnStubs.insert(Name);
+            printSuffixedName(Name, "$stub");
+          }
+        } else if (GV->hasHiddenVisibility()) {
+          if (!GV->isDeclaration() && !GV->hasCommonLinkage())
+            // Definition is not definitely in the current translation unit.
+            O << Name;
+          else {
+            HiddenGVStubs.insert(Name);
+            printSuffixedName(Name, "$non_lazy_ptr");
+          }
+        } else {
+          GVStubs.insert(Name);
+          printSuffixedName(Name, "$non_lazy_ptr");
+        }
+      } else {
+        if (GV->hasDLLImportLinkage())
+          O << "__imp_";
+        O << Name;
+      }
+
+      if (!isCallOp && TM.getRelocationModel() == Reloc::PIC_)
+        O << '-' << getPICLabelString(getFunctionNumber(), TAI, Subtarget);
+    } else {
+      if (GV->hasDLLImportLinkage()) {
+        O << "__imp_";
+      }
+      O << Name;
+
+      if (isCallOp) {
+        if (shouldPrintPLT(TM, Subtarget)) {
+          // Assemble call via PLT for externally visible symbols
+          if (!GV->hasHiddenVisibility() && !GV->hasProtectedVisibility() &&
+              !GV->hasLocalLinkage())
+            O << "@PLT";
+        }
+        if (Subtarget->isTargetCygMing() && GV->isDeclaration())
+          // Save function name for later type emission
+          FnStubs.insert(Name);
+      }
+    }
+
+    if (GV->hasExternalWeakLinkage())
+      ExtWeakSymbols.insert(GV);
+
+    printOffset(MO.getOffset());
+
+    if (isThreadLocal) {
+      TLSModel::Model model = getTLSModel(GVar, TM.getRelocationModel());
+      switch (model) {
+      case TLSModel::GeneralDynamic:
+        O << "@TLSGD";
+        break;
+      case TLSModel::LocalDynamic:
+        // O << "@TLSLD"; // local dynamic not implemented
+        O << "@TLSGD";
+        break;
+      case TLSModel::InitialExec:
+        if (Subtarget->is64Bit()) {
+          assert (!NotRIPRel);
+          O << "@GOTTPOFF(%rip)";
+        } else {
+          O << "@INDNTPOFF";
+        }
+        break;
+      case TLSModel::LocalExec:
+        if (Subtarget->is64Bit())
+          O << "@TPOFF";
+        else
+          O << "@NTPOFF";
+        break;
+      default:
+        assert (0 && "Unknown TLS model");
+      }
+    } else if (isMemOp) {
+      if (shouldPrintGOT(TM, Subtarget)) {
+        if (Subtarget->GVRequiresExtraLoad(GV, TM, false))
+          O << "@GOT";
+        else
+          O << "@GOTOFF";
+      } else if (Subtarget->isPICStyleRIPRel() && !NotRIPRel) {
+        if (TM.getRelocationModel() != Reloc::Static) {
+          if (Subtarget->GVRequiresExtraLoad(GV, TM, false))
+            O << "@GOTPCREL";
+
+          if (needCloseParen) {
+            needCloseParen = false;
+            O << ')';
+          }
+        }
+
+        // Use rip when possible to reduce code size, except when
+        // index or base register are also part of the address. e.g.
+        // foo(%rip)(%rcx,%rax,4) is not legal
+        O << "(%rip)";
+      }
+    }
+
+    if (needCloseParen)
+      O << ')';
+
+    return;
+  }
+  case MachineOperand::MO_ExternalSymbol: {
+    bool isCallOp = Modifier && !strcmp(Modifier, "call");
+    bool isMemOp  = Modifier && !strcmp(Modifier, "mem");
+    bool needCloseParen = false;
+    std::string Name(TAI->getGlobalPrefix());
+    Name += MO.getSymbolName();
+    // Print function stub suffix unless it's Mac OS X 10.5 and up.
+    if (isCallOp && shouldPrintStub(TM, Subtarget) && 
+        !(Subtarget->isTargetDarwin() && Subtarget->getDarwinVers() >= 9)) {
+      FnStubs.insert(Name);
+      printSuffixedName(Name, "$stub");
+      return;
+    }
+    if (!isMemOp && !isCallOp)
+      O << '$';
+    else if (Name[0] == '$') {
+      // The name begins with a dollar-sign. In order to avoid having it look
+      // like an integer immediate to the assembler, enclose it in parens.
+      O << '(';
+      needCloseParen = true;
+    }
+
+    O << Name;
+
+    if (shouldPrintPLT(TM, Subtarget)) {
+      std::string GOTName(TAI->getGlobalPrefix());
+      GOTName+="_GLOBAL_OFFSET_TABLE_";
+      if (Name == GOTName)
+        // HACK! Emit extra offset to PC during printing GOT offset to
+        // compensate for the size of popl instruction. The resulting code
+        // should look like:
+        //   call .piclabel
+        // piclabel:
+        //   popl %some_register
+        //   addl $_GLOBAL_ADDRESS_TABLE_ + [.-piclabel], %some_register
+        O << " + [.-"
+          << getPICLabelString(getFunctionNumber(), TAI, Subtarget) << ']';
+
+      if (isCallOp)
+        O << "@PLT";
+    }
+
+    if (needCloseParen)
+      O << ')';
+
+    if (!isCallOp && Subtarget->isPICStyleRIPRel())
+      O << "(%rip)";
+
+    return;
+  }
+  default:
+    O << "<unknown operand type>"; return;
+  }
+}
+
+void X86ATTAsmPrinter::printSSECC(const MachineInstr *MI, unsigned Op) {
+  unsigned char value = MI->getOperand(Op).getImm();
+  assert(value <= 7 && "Invalid ssecc argument!");
+  switch (value) {
+  case 0: O << "eq"; break;
+  case 1: O << "lt"; break;
+  case 2: O << "le"; break;
+  case 3: O << "unord"; break;
+  case 4: O << "neq"; break;
+  case 5: O << "nlt"; break;
+  case 6: O << "nle"; break;
+  case 7: O << "ord"; break;
+  }
+}
+
+void X86ATTAsmPrinter::printLeaMemReference(const MachineInstr *MI, unsigned Op,
+                                            const char *Modifier,
+                                            bool NotRIPRel) {
+  MachineOperand BaseReg  = MI->getOperand(Op);
+  MachineOperand IndexReg = MI->getOperand(Op+2);
+  const MachineOperand &DispSpec = MI->getOperand(Op+3);
+
+  NotRIPRel |= IndexReg.getReg() || BaseReg.getReg();
+  if (DispSpec.isGlobal() ||
+      DispSpec.isCPI() ||
+      DispSpec.isJTI() ||
+      DispSpec.isSymbol()) {
+    printOperand(MI, Op+3, "mem", NotRIPRel);
+  } else {
+    int DispVal = DispSpec.getImm();
+    if (DispVal || (!IndexReg.getReg() && !BaseReg.getReg()))
+      O << DispVal;
+  }
+
+  if (IndexReg.getReg() || BaseReg.getReg()) {
+    unsigned ScaleVal = MI->getOperand(Op+1).getImm();
+    unsigned BaseRegOperand = 0, IndexRegOperand = 2;
+
+    // There are cases where we can end up with ESP/RSP in the indexreg slot.
+    // If this happens, swap the base/index register to support assemblers that
+    // don't work when the index is *SP.
+    if (IndexReg.getReg() == X86::ESP || IndexReg.getReg() == X86::RSP) {
+      assert(ScaleVal == 1 && "Scale not supported for stack pointer!");
+      std::swap(BaseReg, IndexReg);
+      std::swap(BaseRegOperand, IndexRegOperand);
+    }
+
+    O << '(';
+    if (BaseReg.getReg())
+      printOperand(MI, Op+BaseRegOperand, Modifier);
+
+    if (IndexReg.getReg()) {
+      O << ',';
+      printOperand(MI, Op+IndexRegOperand, Modifier);
+      if (ScaleVal != 1)
+        O << ',' << ScaleVal;
+    }
+    O << ')';
+  }
+}
+
+void X86ATTAsmPrinter::printMemReference(const MachineInstr *MI, unsigned Op,
+                                         const char *Modifier, bool NotRIPRel){
+  assert(isMem(MI, Op) && "Invalid memory reference!");
+  MachineOperand Segment = MI->getOperand(Op+4);
+  if (Segment.getReg()) {
+      printOperand(MI, Op+4, Modifier);
+      O << ':';
+    }
+  printLeaMemReference(MI, Op, Modifier, NotRIPRel);
+}
+
+void X86ATTAsmPrinter::printPICJumpTableSetLabel(unsigned uid,
+                                           const MachineBasicBlock *MBB) const {
+  if (!TAI->getSetDirective())
+    return;
+
+  // We don't need .set machinery if we have GOT-style relocations
+  if (Subtarget->isPICStyleGOT())
+    return;
+
+  O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
+    << getFunctionNumber() << '_' << uid << "_set_" << MBB->getNumber() << ',';
+  printBasicBlockLabel(MBB, false, false, false);
+  if (Subtarget->isPICStyleRIPRel())
+    O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
+      << '_' << uid << '\n';
+  else
+    O << '-' << getPICLabelString(getFunctionNumber(), TAI, Subtarget) << '\n';
+}
+
+void X86ATTAsmPrinter::printPICLabel(const MachineInstr *MI, unsigned Op) {
+  std::string label = getPICLabelString(getFunctionNumber(), TAI, Subtarget);
+  O << label << '\n' << label << ':';
+}
+
+
+void X86ATTAsmPrinter::printPICJumpTableEntry(const MachineJumpTableInfo *MJTI,
+                                              const MachineBasicBlock *MBB,
+                                              unsigned uid) const
+{
+  const char *JTEntryDirective = MJTI->getEntrySize() == 4 ?
+    TAI->getData32bitsDirective() : TAI->getData64bitsDirective();
+
+  O << JTEntryDirective << ' ';
+
+  if (TM.getRelocationModel() == Reloc::PIC_) {
+    if (Subtarget->isPICStyleRIPRel() || Subtarget->isPICStyleStub()) {
+      O << TAI->getPrivateGlobalPrefix() << getFunctionNumber()
+        << '_' << uid << "_set_" << MBB->getNumber();
+    } else if (Subtarget->isPICStyleGOT()) {
+      printBasicBlockLabel(MBB, false, false, false);
+      O << "@GOTOFF";
+    } else
+      assert(0 && "Don't know how to print MBB label for this PIC mode");
+  } else
+    printBasicBlockLabel(MBB, false, false, false);
+}
+
+bool X86ATTAsmPrinter::printAsmMRegister(const MachineOperand &MO,
+                                         const char Mode) {
+  unsigned Reg = MO.getReg();
+  switch (Mode) {
+  default: return true;  // Unknown mode.
+  case 'b': // Print QImode register
+    Reg = getX86SubSuperRegister(Reg, MVT::i8);
+    break;
+  case 'h': // Print QImode high register
+    Reg = getX86SubSuperRegister(Reg, MVT::i8, true);
+    break;
+  case 'w': // Print HImode register
+    Reg = getX86SubSuperRegister(Reg, MVT::i16);
+    break;
+  case 'k': // Print SImode register
+    Reg = getX86SubSuperRegister(Reg, MVT::i32);
+    break;
+  case 'q': // Print DImode register
+    Reg = getX86SubSuperRegister(Reg, MVT::i64);
+    break;
+  }
+
+  O << '%'<< TRI->getAsmName(Reg);
+  return false;
+}
+
+/// PrintAsmOperand - Print out an operand for an inline asm expression.
+///
+bool X86ATTAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
+                                       unsigned AsmVariant,
+                                       const char *ExtraCode) {
+  // Does this asm operand have a single letter operand modifier?
+  if (ExtraCode && ExtraCode[0]) {
+    if (ExtraCode[1] != 0) return true; // Unknown modifier.
+
+    switch (ExtraCode[0]) {
+    default: return true;  // Unknown modifier.
+    case 'c': // Don't print "$" before a global var name or constant.
+      printOperand(MI, OpNo, "mem", /*NotRIPRel=*/true);
+      return false;
+    case 'b': // Print QImode register
+    case 'h': // Print QImode high register
+    case 'w': // Print HImode register
+    case 'k': // Print SImode register
+    case 'q': // Print DImode register
+      if (MI->getOperand(OpNo).isReg())
+        return printAsmMRegister(MI->getOperand(OpNo), ExtraCode[0]);
+      printOperand(MI, OpNo);
+      return false;
+
+    case 'P': // Don't print @PLT, but do print as memory.
+      printOperand(MI, OpNo, "mem", /*NotRIPRel=*/true);
+      return false;
+    }
+  }
+
+  printOperand(MI, OpNo);
+  return false;
+}
+
+bool X86ATTAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
+                                             unsigned OpNo,
+                                             unsigned AsmVariant,
+                                             const char *ExtraCode) {
+  if (ExtraCode && ExtraCode[0]) {
+    if (ExtraCode[1] != 0) return true; // Unknown modifier.
+
+    switch (ExtraCode[0]) {
+    default: return true;  // Unknown modifier.
+    case 'b': // Print QImode register
+    case 'h': // Print QImode high register
+    case 'w': // Print HImode register
+    case 'k': // Print SImode register
+    case 'q': // Print SImode register
+      // These only apply to registers, ignore on mem.
+      break;
+    case 'P': // Don't print @PLT, but do print as memory.
+      printMemReference(MI, OpNo, "mem", /*NotRIPRel=*/true);
+      return false;
+    }
+  }
+  printMemReference(MI, OpNo);
+  return false;
+}
+
+/// printMachineInstruction -- Print out a single X86 LLVM instruction MI in
+/// AT&T syntax to the current output stream.
+///
+void X86ATTAsmPrinter::printMachineInstruction(const MachineInstr *MI) {
+  ++EmittedInsts;
+
+  // Call the autogenerated instruction printer routines.
+  printInstruction(MI);
+}
+
+/// doInitialization
+bool X86ATTAsmPrinter::doInitialization(Module &M) {
+
+  bool Result = AsmPrinter::doInitialization(M);
+
+  if (TAI->doesSupportDebugInformation()) {
+    // Let PassManager know we need debug information and relay
+    // the MachineModuleInfo address on to DwarfWriter.
+    // AsmPrinter::doInitialization did this analysis.
+    MMI = getAnalysisIfAvailable<MachineModuleInfo>();
+    DW = getAnalysisIfAvailable<DwarfWriter>();
+    DW->BeginModule(&M, MMI, O, this, TAI);
+  }
+
+  // Darwin wants symbols to be quoted if they have complex names.
+  if (Subtarget->isTargetDarwin())
+    Mang->setUseQuotes(true);
+
+  return Result;
+}
+
+
+void X86ATTAsmPrinter::printModuleLevelGV(const GlobalVariable* GVar) {
+  const TargetData *TD = TM.getTargetData();
+
+  if (!GVar->hasInitializer())
+    return;   // External global require no code
+
+  // Check to see if this is a special global used by LLVM, if so, emit it.
+  if (EmitSpecialLLVMGlobal(GVar)) {
+    if (Subtarget->isTargetDarwin() &&
+        TM.getRelocationModel() == Reloc::Static) {
+      if (GVar->getName() == "llvm.global_ctors")
+        O << ".reference .constructors_used\n";
+      else if (GVar->getName() == "llvm.global_dtors")
+        O << ".reference .destructors_used\n";
+    }
+    return;
+  }
+
+  std::string name = Mang->getValueName(GVar);
+  Constant *C = GVar->getInitializer();
+  const Type *Type = C->getType();
+  unsigned Size = TD->getTypeAllocSize(Type);
+  unsigned Align = TD->getPreferredAlignmentLog(GVar);
+
+  printVisibility(name, GVar->getVisibility());
+
+  if (Subtarget->isTargetELF())
+    O << "\t.type\t" << name << ",@object\n";
+
+  SwitchToSection(TAI->SectionForGlobal(GVar));
+
+  if (C->isNullValue() && !GVar->hasSection() &&
+      !(Subtarget->isTargetDarwin() &&
+        TAI->SectionKindForGlobal(GVar) == SectionKind::RODataMergeStr)) {
+    // FIXME: This seems to be pretty darwin-specific
+    if (GVar->hasExternalLinkage()) {
+      if (const char *Directive = TAI->getZeroFillDirective()) {
+        O << "\t.globl " << name << '\n';
+        O << Directive << "__DATA, __common, " << name << ", "
+          << Size << ", " << Align << '\n';
+        return;
+      }
+    }
+
+    if (!GVar->isThreadLocal() &&
+        (GVar->hasLocalLinkage() || GVar->isWeakForLinker())) {
+      if (Size == 0) Size = 1;   // .comm Foo, 0 is undefined, avoid it.
+
+      if (TAI->getLCOMMDirective() != NULL) {
+        if (GVar->hasLocalLinkage()) {
+          O << TAI->getLCOMMDirective() << name << ',' << Size;
+          if (Subtarget->isTargetDarwin())
+            O << ',' << Align;
+        } else if (Subtarget->isTargetDarwin() && !GVar->hasCommonLinkage()) {
+          O << "\t.globl " << name << '\n'
+            << TAI->getWeakDefDirective() << name << '\n';
+          EmitAlignment(Align, GVar);
+          O << name << ":";
+          if (VerboseAsm) {
+            O << "\t\t\t\t" << TAI->getCommentString() << ' ';
+            PrintUnmangledNameSafely(GVar, O);
+          }
+          O << '\n';
+          EmitGlobalConstant(C);
+          return;
+        } else {
+          O << TAI->getCOMMDirective()  << name << ',' << Size;
+          if (TAI->getCOMMDirectiveTakesAlignment())
+            O << ',' << (TAI->getAlignmentIsInBytes() ? (1 << Align) : Align);
+        }
+      } else {
+        if (!Subtarget->isTargetCygMing()) {
+          if (GVar->hasLocalLinkage())
+            O << "\t.local\t" << name << '\n';
+        }
+        O << TAI->getCOMMDirective()  << name << ',' << Size;
+        if (TAI->getCOMMDirectiveTakesAlignment())
+          O << ',' << (TAI->getAlignmentIsInBytes() ? (1 << Align) : Align);
+      }
+      if (VerboseAsm) {
+        O << "\t\t" << TAI->getCommentString() << ' ';
+        PrintUnmangledNameSafely(GVar, O);
+      }
+      O << '\n';
+      return;
+    }
+  }
+
+  switch (GVar->getLinkage()) {
+  case GlobalValue::CommonLinkage:
+  case GlobalValue::LinkOnceAnyLinkage:
+  case GlobalValue::LinkOnceODRLinkage:
+  case GlobalValue::WeakAnyLinkage:
+  case GlobalValue::WeakODRLinkage:
+    if (Subtarget->isTargetDarwin()) {
+      O << "\t.globl " << name << '\n'
+        << TAI->getWeakDefDirective() << name << '\n';
+    } else if (Subtarget->isTargetCygMing()) {
+      O << "\t.globl\t" << name << "\n"
+           "\t.linkonce same_size\n";
+    } else {
+      O << "\t.weak\t" << name << '\n';
+    }
+    break;
+  case GlobalValue::DLLExportLinkage:
+  case GlobalValue::AppendingLinkage:
+    // FIXME: appending linkage variables should go into a section of
+    // their name or something.  For now, just emit them as external.
+  case GlobalValue::ExternalLinkage:
+    // If external or appending, declare as a global symbol
+    O << "\t.globl " << name << '\n';
+    // FALL THROUGH
+  case GlobalValue::PrivateLinkage:
+  case GlobalValue::InternalLinkage:
+     break;
+  default:
+    assert(0 && "Unknown linkage type!");
+  }
+
+  EmitAlignment(Align, GVar);
+  O << name << ":";
+  if (VerboseAsm){
+    O << "\t\t\t\t" << TAI->getCommentString() << ' ';
+    PrintUnmangledNameSafely(GVar, O);
+  }
+  O << '\n';
+  if (TAI->hasDotTypeDotSizeDirective())
+    O << "\t.size\t" << name << ", " << Size << '\n';
+
+  EmitGlobalConstant(C);
+}
+
+/// printGVStub - Print stub for a global value.
+///
+void X86ATTAsmPrinter::printGVStub(const char *GV, const char *Prefix) {
+  printSuffixedName(GV, "$non_lazy_ptr", Prefix);
+  O << ":\n\t.indirect_symbol ";
+  if (Prefix) O << Prefix;
+  O << GV << "\n\t.long\t0\n";
+}
+
+/// printHiddenGVStub - Print stub for a hidden global value.
+///
+void X86ATTAsmPrinter::printHiddenGVStub(const char *GV, const char *Prefix) {
+  EmitAlignment(2);
+  printSuffixedName(GV, "$non_lazy_ptr", Prefix);
+  if (Prefix) O << Prefix;
+  O << ":\n" << TAI->getData32bitsDirective() << GV << '\n';
+}
+
+
+bool X86ATTAsmPrinter::doFinalization(Module &M) {
+  // Print out module-level global variables here.
+  for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
+       I != E; ++I) {
+    printModuleLevelGV(I);
+
+    if (I->hasDLLExportLinkage())
+      DLLExportedGVs.insert(Mang->makeNameProper(I->getName(),""));
+
+    // If the global is a extern weak symbol, remember to emit the weak
+    // reference!
+    // FIXME: This is rather hacky, since we'll emit references to ALL weak
+    // stuff, not used. But currently it's the only way to deal with extern weak
+    // initializers hidden deep inside constant expressions.
+    if (I->hasExternalWeakLinkage())
+      ExtWeakSymbols.insert(I);
+  }
+
+  for (Module::const_iterator I = M.begin(), E = M.end();
+       I != E; ++I) {
+    // If the global is a extern weak symbol, remember to emit the weak
+    // reference!
+    // FIXME: This is rather hacky, since we'll emit references to ALL weak
+    // stuff, not used. But currently it's the only way to deal with extern weak
+    // initializers hidden deep inside constant expressions.
+    if (I->hasExternalWeakLinkage())
+      ExtWeakSymbols.insert(I);
+  }
+
+  // Output linker support code for dllexported globals
+  if (!DLLExportedGVs.empty())
+    SwitchToDataSection(".section .drectve");
+
+  for (StringSet<>::iterator i = DLLExportedGVs.begin(),
+         e = DLLExportedGVs.end();
+         i != e; ++i)
+    O << "\t.ascii \" -export:" << i->getKeyData() << ",data\"\n";
+
+  if (!DLLExportedFns.empty()) {
+    SwitchToDataSection(".section .drectve");
+  }
+
+  for (StringSet<>::iterator i = DLLExportedFns.begin(),
+         e = DLLExportedFns.end();
+         i != e; ++i)
+    O << "\t.ascii \" -export:" << i->getKeyData() << "\"\n";
+
+  if (Subtarget->isTargetDarwin()) {
+    SwitchToDataSection("");
+
+    // Output stubs for dynamically-linked functions
+    for (StringSet<>::iterator i = FnStubs.begin(), e = FnStubs.end();
+         i != e; ++i) {
+      SwitchToDataSection("\t.section __IMPORT,__jump_table,symbol_stubs,"
+                          "self_modifying_code+pure_instructions,5", 0);
+      const char *p = i->getKeyData();
+      printSuffixedName(p, "$stub");
+      O << ":\n"
+           "\t.indirect_symbol " << p << "\n"
+           "\thlt ; hlt ; hlt ; hlt ; hlt\n";
+    }
+
+    O << '\n';
+
+    // Print global value stubs.
+    bool InStubSection = false;
+    if (TAI->doesSupportExceptionHandling() && MMI && !Subtarget->is64Bit()) {
+      // Add the (possibly multiple) personalities to the set of global values.
+      // Only referenced functions get into the Personalities list.
+      const std::vector<Function *>& Personalities = MMI->getPersonalities();
+      for (std::vector<Function *>::const_iterator I = Personalities.begin(),
+             E = Personalities.end(); I != E; ++I) {
+        if (!*I)
+          continue;
+        if (!InStubSection) {
+          SwitchToDataSection(
+                     "\t.section __IMPORT,__pointers,non_lazy_symbol_pointers");
+          InStubSection = true;
+        }
+        printGVStub((*I)->getNameStart(), "_");
+      }
+    }
+
+    // Output stubs for external and common global variables.
+    if (!InStubSection && !GVStubs.empty())
+      SwitchToDataSection(
+                    "\t.section __IMPORT,__pointers,non_lazy_symbol_pointers");
+    for (StringSet<>::iterator i = GVStubs.begin(), e = GVStubs.end();
+         i != e; ++i)
+      printGVStub(i->getKeyData());
+
+    if (!HiddenGVStubs.empty()) {
+      SwitchToSection(TAI->getDataSection());
+      for (StringSet<>::iterator i = HiddenGVStubs.begin(), e = HiddenGVStubs.end();
+           i != e; ++i)
+        printHiddenGVStub(i->getKeyData());
+    }
+
+    // Emit final debug information.
+    DwarfWriter *DW = getAnalysisIfAvailable<DwarfWriter>();
+    DW->EndModule();
+
+    // Funny Darwin hack: This flag tells the linker that no global symbols
+    // contain code that falls through to other global symbols (e.g. the obvious
+    // implementation of multiple entry points).  If this doesn't occur, the
+    // linker can safely perform dead code stripping.  Since LLVM never
+    // generates code that does this, it is always safe to set.
+    O << "\t.subsections_via_symbols\n";
+  } else if (Subtarget->isTargetCygMing()) {
+    // Emit type information for external functions
+    for (StringSet<>::iterator i = FnStubs.begin(), e = FnStubs.end();
+         i != e; ++i) {
+      O << "\t.def\t " << i->getKeyData()
+        << ";\t.scl\t" << COFF::C_EXT
+        << ";\t.type\t" << (COFF::DT_FCN << COFF::N_BTSHFT)
+        << ";\t.endef\n";
+    }
+
+    // Emit final debug information.
+    DwarfWriter *DW = getAnalysisIfAvailable<DwarfWriter>();
+    DW->EndModule();
+  } else if (Subtarget->isTargetELF()) {
+    // Emit final debug information.
+    DwarfWriter *DW = getAnalysisIfAvailable<DwarfWriter>();
+    DW->EndModule();
+  }
+
+  return AsmPrinter::doFinalization(M);
+}
+
+// Include the auto-generated portion of the assembly writer.
+#include "X86GenAsmWriter.inc"
diff --git a/lib/Target/X86/AsmPrinter/X86ATTAsmPrinter.h b/lib/Target/X86/AsmPrinter/X86ATTAsmPrinter.h
new file mode 100644
index 0000000..5b40e73
--- /dev/null
+++ b/lib/Target/X86/AsmPrinter/X86ATTAsmPrinter.h
@@ -0,0 +1,164 @@
+//===-- X86ATTAsmPrinter.h - Convert X86 LLVM code to AT&T assembly -------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// AT&T assembly code printer class.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef X86ATTASMPRINTER_H
+#define X86ATTASMPRINTER_H
+
+#include "../X86.h"
+#include "../X86MachineFunctionInfo.h"
+#include "../X86TargetMachine.h"
+#include "llvm/ADT/StringSet.h"
+#include "llvm/CodeGen/AsmPrinter.h"
+#include "llvm/CodeGen/DwarfWriter.h"
+#include "llvm/CodeGen/MachineModuleInfo.h"
+#include "llvm/CodeGen/ValueTypes.h"
+#include "llvm/Support/Compiler.h"
+
+namespace llvm {
+
+class MachineJumpTableInfo;
+
+class VISIBILITY_HIDDEN X86ATTAsmPrinter : public AsmPrinter {
+  DwarfWriter *DW;
+  MachineModuleInfo *MMI;
+  const X86Subtarget *Subtarget;
+ public:
+  explicit X86ATTAsmPrinter(raw_ostream &O, X86TargetMachine &TM,
+                            const TargetAsmInfo *T, CodeGenOpt::Level OL,
+                            bool V)
+    : AsmPrinter(O, TM, T, OL, V), DW(0), MMI(0) {
+    Subtarget = &TM.getSubtarget<X86Subtarget>();
+  }
+
+  virtual const char *getPassName() const {
+    return "X86 AT&T-Style Assembly Printer";
+  }
+
+  void getAnalysisUsage(AnalysisUsage &AU) const {
+    AU.setPreservesAll();
+    if (Subtarget->isTargetDarwin() ||
+        Subtarget->isTargetELF() ||
+        Subtarget->isTargetCygMing()) {
+      AU.addRequired<MachineModuleInfo>();
+    }
+    AU.addRequired<DwarfWriter>();
+    AsmPrinter::getAnalysisUsage(AU);
+  }
+
+  bool doInitialization(Module &M);
+  bool doFinalization(Module &M);
+
+  /// printInstruction - This method is automatically generated by tablegen
+  /// from the instruction set description.  This method returns true if the
+  /// machine instruction was sufficiently described to print it, otherwise it
+  /// returns false.
+  bool printInstruction(const MachineInstr *MI);
+
+  // These methods are used by the tablegen'erated instruction printer.
+  void printOperand(const MachineInstr *MI, unsigned OpNo,
+                    const char *Modifier = 0, bool NotRIPRel = false);
+  void printi8mem(const MachineInstr *MI, unsigned OpNo) {
+    printMemReference(MI, OpNo);
+  }
+  void printi16mem(const MachineInstr *MI, unsigned OpNo) {
+    printMemReference(MI, OpNo);
+  }
+  void printi32mem(const MachineInstr *MI, unsigned OpNo) {
+    printMemReference(MI, OpNo);
+  }
+  void printi64mem(const MachineInstr *MI, unsigned OpNo) {
+    printMemReference(MI, OpNo);
+  }
+  void printi128mem(const MachineInstr *MI, unsigned OpNo) {
+    printMemReference(MI, OpNo);
+  }
+  void printf32mem(const MachineInstr *MI, unsigned OpNo) {
+    printMemReference(MI, OpNo);
+  }
+  void printf64mem(const MachineInstr *MI, unsigned OpNo) {
+    printMemReference(MI, OpNo);
+  }
+  void printf80mem(const MachineInstr *MI, unsigned OpNo) {
+    printMemReference(MI, OpNo);
+  }
+  void printf128mem(const MachineInstr *MI, unsigned OpNo) {
+    printMemReference(MI, OpNo);
+  }
+  void printlea32mem(const MachineInstr *MI, unsigned OpNo) {
+    printLeaMemReference(MI, OpNo);
+  }
+  void printlea64mem(const MachineInstr *MI, unsigned OpNo) {
+    printLeaMemReference(MI, OpNo);
+  }
+  void printlea64_32mem(const MachineInstr *MI, unsigned OpNo) {
+    printLeaMemReference(MI, OpNo, "subreg64");
+  }
+
+  bool printAsmMRegister(const MachineOperand &MO, const char Mode);
+  bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
+                       unsigned AsmVariant, const char *ExtraCode);
+  bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
+                             unsigned AsmVariant, const char *ExtraCode);
+
+  void printMachineInstruction(const MachineInstr *MI);
+  void printSSECC(const MachineInstr *MI, unsigned Op);
+  void printMemReference(const MachineInstr *MI, unsigned Op,
+                         const char *Modifier=NULL, bool NotRIPRel = false);
+  void printLeaMemReference(const MachineInstr *MI, unsigned Op,
+                            const char *Modifier=NULL, bool NotRIPRel = false);
+  void printPICJumpTableSetLabel(unsigned uid,
+                                 const MachineBasicBlock *MBB) const;
+  void printPICJumpTableSetLabel(unsigned uid, unsigned uid2,
+                                 const MachineBasicBlock *MBB) const {
+    AsmPrinter::printPICJumpTableSetLabel(uid, uid2, MBB);
+  }
+  void printPICJumpTableEntry(const MachineJumpTableInfo *MJTI,
+                              const MachineBasicBlock *MBB,
+                              unsigned uid) const;
+
+  void printPICLabel(const MachineInstr *MI, unsigned Op);
+  void printModuleLevelGV(const GlobalVariable* GVar);
+
+  void printGVStub(const char *GV, const char *Prefix = NULL);
+  void printHiddenGVStub(const char *GV, const char *Prefix = NULL);
+
+  bool runOnMachineFunction(MachineFunction &F);
+
+  void emitFunctionHeader(const MachineFunction &MF);
+
+  // Necessary for Darwin to print out the apprioriate types of linker stubs
+  StringSet<> FnStubs, GVStubs, HiddenGVStubs;
+
+  // Necessary for dllexport support
+  StringSet<> DLLExportedFns, DLLExportedGVs;
+
+  // We have to propagate some information about MachineFunction to
+  // AsmPrinter. It's ok, when we're printing the function, since we have
+  // access to MachineFunction and can get the appropriate MachineFunctionInfo.
+  // Unfortunately, this is not possible when we're printing reference to
+  // Function (e.g. calling it and so on). Even more, there is no way to get the
+  // corresponding MachineFunctions: it can even be not created at all. That's
+  // why we should use additional structure, when we're collecting all necessary
+  // information.
+  //
+  // This structure is using e.g. for name decoration for stdcall & fastcall'ed
+  // function, since we have to use arguments' size for decoration.
+  typedef std::map<const Function*, X86MachineFunctionInfo> FMFInfoMap;
+  FMFInfoMap FunctionInfoMap;
+
+  void decorateName(std::string& Name, const GlobalValue* GV);
+};
+
+} // end namespace llvm
+
+#endif
diff --git a/lib/Target/X86/AsmPrinter/X86AsmPrinter.cpp b/lib/Target/X86/AsmPrinter/X86AsmPrinter.cpp
new file mode 100644
index 0000000..c874849
--- /dev/null
+++ b/lib/Target/X86/AsmPrinter/X86AsmPrinter.cpp
@@ -0,0 +1,50 @@
+//===-- X86AsmPrinter.cpp - Convert X86 LLVM IR to X86 assembly -----------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file the shared super class printer that converts from our internal
+// representation of machine-dependent LLVM code to Intel and AT&T format
+// assembly language.
+// This printer is the output mechanism used by `llc'.
+//
+//===----------------------------------------------------------------------===//
+
+#include "X86ATTAsmPrinter.h"
+#include "X86IntelAsmPrinter.h"
+#include "X86Subtarget.h"
+using namespace llvm;
+
+/// createX86CodePrinterPass - Returns a pass that prints the X86 assembly code
+/// for a MachineFunction to the given output stream, using the given target
+/// machine description.
+///
+FunctionPass *llvm::createX86CodePrinterPass(raw_ostream &o,
+                                             X86TargetMachine &tm,
+                                             CodeGenOpt::Level OptLevel,
+                                             bool verbose) {
+  const X86Subtarget *Subtarget = &tm.getSubtarget<X86Subtarget>();
+
+  if (Subtarget->isFlavorIntel()) {
+    return new X86IntelAsmPrinter(o, tm, tm.getTargetAsmInfo(),
+                                  OptLevel, verbose);
+  } else {
+    return new X86ATTAsmPrinter(o, tm, tm.getTargetAsmInfo(),
+                                OptLevel, verbose);
+  }
+}
+
+namespace {
+  static struct Register {
+    Register() {
+      X86TargetMachine::registerAsmPrinter(createX86CodePrinterPass);
+    }
+  } Registrator;
+}
+
+extern "C" int X86AsmPrinterForceLink;
+int X86AsmPrinterForceLink = 0;
diff --git a/lib/Target/X86/AsmPrinter/X86IntelAsmPrinter.cpp b/lib/Target/X86/AsmPrinter/X86IntelAsmPrinter.cpp
new file mode 100644
index 0000000..6599349
--- /dev/null
+++ b/lib/Target/X86/AsmPrinter/X86IntelAsmPrinter.cpp
@@ -0,0 +1,609 @@
+//===-- X86IntelAsmPrinter.cpp - Convert X86 LLVM code to Intel assembly --===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains a printer that converts from our internal representation
+// of machine-dependent LLVM code to Intel format assembly language.
+// This printer is the output mechanism used by `llc'.
+//
+//===----------------------------------------------------------------------===//
+
+#define DEBUG_TYPE "asm-printer"
+#include "X86IntelAsmPrinter.h"
+#include "X86InstrInfo.h"
+#include "X86TargetAsmInfo.h"
+#include "X86.h"
+#include "llvm/CallingConv.h"
+#include "llvm/Constants.h"
+#include "llvm/DerivedTypes.h"
+#include "llvm/Module.h"
+#include "llvm/ADT/Statistic.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/Assembly/Writer.h"
+#include "llvm/CodeGen/DwarfWriter.h"
+#include "llvm/Support/Mangler.h"
+#include "llvm/Target/TargetAsmInfo.h"
+#include "llvm/Target/TargetOptions.h"
+using namespace llvm;
+
+STATISTIC(EmittedInsts, "Number of machine instrs printed");
+
+static X86MachineFunctionInfo calculateFunctionInfo(const Function *F,
+                                                    const TargetData *TD) {
+  X86MachineFunctionInfo Info;
+  uint64_t Size = 0;
+
+  switch (F->getCallingConv()) {
+  case CallingConv::X86_StdCall:
+    Info.setDecorationStyle(StdCall);
+    break;
+  case CallingConv::X86_FastCall:
+    Info.setDecorationStyle(FastCall);
+    break;
+  default:
+    return Info;
+  }
+
+  unsigned argNum = 1;
+  for (Function::const_arg_iterator AI = F->arg_begin(), AE = F->arg_end();
+       AI != AE; ++AI, ++argNum) {
+    const Type* Ty = AI->getType();
+
+    // 'Dereference' type in case of byval parameter attribute
+    if (F->paramHasAttr(argNum, Attribute::ByVal))
+      Ty = cast<PointerType>(Ty)->getElementType();
+
+    // Size should be aligned to DWORD boundary
+    Size += ((TD->getTypeAllocSize(Ty) + 3)/4)*4;
+  }
+
+  // We're not supporting tooooo huge arguments :)
+  Info.setBytesToPopOnReturn((unsigned int)Size);
+  return Info;
+}
+
+
+/// decorateName - Query FunctionInfoMap and use this information for various
+/// name decoration.
+void X86IntelAsmPrinter::decorateName(std::string &Name,
+                                      const GlobalValue *GV) {
+  const Function *F = dyn_cast<Function>(GV);
+  if (!F) return;
+
+  // We don't want to decorate non-stdcall or non-fastcall functions right now
+  unsigned CC = F->getCallingConv();
+  if (CC != CallingConv::X86_StdCall && CC != CallingConv::X86_FastCall)
+    return;
+
+  FMFInfoMap::const_iterator info_item = FunctionInfoMap.find(F);
+
+  const X86MachineFunctionInfo *Info;
+  if (info_item == FunctionInfoMap.end()) {
+    // Calculate apropriate function info and populate map
+    FunctionInfoMap[F] = calculateFunctionInfo(F, TM.getTargetData());
+    Info = &FunctionInfoMap[F];
+  } else {
+    Info = &info_item->second;
+  }
+
+  const FunctionType *FT = F->getFunctionType();
+  switch (Info->getDecorationStyle()) {
+  case None:
+    break;
+  case StdCall:
+    // "Pure" variadic functions do not receive @0 suffix.
+    if (!FT->isVarArg() || (FT->getNumParams() == 0) ||
+        (FT->getNumParams() == 1 && F->hasStructRetAttr()))
+      Name += '@' + utostr_32(Info->getBytesToPopOnReturn());
+    break;
+  case FastCall:
+    // "Pure" variadic functions do not receive @0 suffix.
+    if (!FT->isVarArg() || (FT->getNumParams() == 0) ||
+        (FT->getNumParams() == 1 && F->hasStructRetAttr()))
+      Name += '@' + utostr_32(Info->getBytesToPopOnReturn());
+
+    if (Name[0] == '_')
+      Name[0] = '@';
+    else
+      Name = '@' + Name;
+
+    break;
+  default:
+    assert(0 && "Unsupported DecorationStyle");
+  }
+}
+
+/// runOnMachineFunction - This uses the printMachineInstruction()
+/// method to print assembly for each instruction.
+///
+bool X86IntelAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
+  this->MF = &MF;
+  SetupMachineFunction(MF);
+  O << "\n\n";
+
+  // Print out constants referenced by the function
+  EmitConstantPool(MF.getConstantPool());
+
+  // Print out labels for the function.
+  const Function *F = MF.getFunction();
+  unsigned CC = F->getCallingConv();
+
+  // Populate function information map.  Actually, We don't want to populate
+  // non-stdcall or non-fastcall functions' information right now.
+  if (CC == CallingConv::X86_StdCall || CC == CallingConv::X86_FastCall)
+    FunctionInfoMap[F] = *MF.getInfo<X86MachineFunctionInfo>();
+
+  decorateName(CurrentFnName, F);
+
+  SwitchToTextSection("_text", F);
+
+  unsigned FnAlign = 4;
+  if (F->hasFnAttr(Attribute::OptimizeForSize))
+    FnAlign = 1;
+  switch (F->getLinkage()) {
+  default: assert(0 && "Unsupported linkage type!");
+  case Function::PrivateLinkage:
+  case Function::InternalLinkage:
+    EmitAlignment(FnAlign);
+    break;
+  case Function::DLLExportLinkage:
+    DLLExportedFns.insert(CurrentFnName);
+    //FALLS THROUGH
+  case Function::ExternalLinkage:
+    O << "\tpublic " << CurrentFnName << "\n";
+    EmitAlignment(FnAlign);
+    break;
+  }
+
+  O << CurrentFnName << "\tproc near\n";
+
+  // Print out code for the function.
+  for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
+       I != E; ++I) {
+    // Print a label for the basic block if there are any predecessors.
+    if (!I->pred_empty()) {
+      printBasicBlockLabel(I, true, true);
+      O << '\n';
+    }
+    for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
+         II != E; ++II) {
+      // Print the assembly for the instruction.
+      printMachineInstruction(II);
+    }
+  }
+
+  // Print out jump tables referenced by the function.
+  EmitJumpTableInfo(MF.getJumpTableInfo(), MF);
+
+  O << CurrentFnName << "\tendp\n";
+
+  O.flush();
+
+  // We didn't modify anything.
+  return false;
+}
+
+void X86IntelAsmPrinter::printSSECC(const MachineInstr *MI, unsigned Op) {
+  unsigned char value = MI->getOperand(Op).getImm();
+  assert(value <= 7 && "Invalid ssecc argument!");
+  switch (value) {
+  case 0: O << "eq"; break;
+  case 1: O << "lt"; break;
+  case 2: O << "le"; break;
+  case 3: O << "unord"; break;
+  case 4: O << "neq"; break;
+  case 5: O << "nlt"; break;
+  case 6: O << "nle"; break;
+  case 7: O << "ord"; break;
+  }
+}
+
+void X86IntelAsmPrinter::printOp(const MachineOperand &MO,
+                                 const char *Modifier) {
+  switch (MO.getType()) {
+  case MachineOperand::MO_Register: {
+    if (TargetRegisterInfo::isPhysicalRegister(MO.getReg())) {
+      unsigned Reg = MO.getReg();
+      if (Modifier && strncmp(Modifier, "subreg", strlen("subreg")) == 0) {
+        MVT VT = (strcmp(Modifier,"subreg64") == 0) ?
+          MVT::i64 : ((strcmp(Modifier, "subreg32") == 0) ? MVT::i32 :
+                      ((strcmp(Modifier,"subreg16") == 0) ? MVT::i16 :MVT::i8));
+        Reg = getX86SubSuperRegister(Reg, VT);
+      }
+      O << TRI->getName(Reg);
+    } else
+      O << "reg" << MO.getReg();
+    return;
+  }
+  case MachineOperand::MO_Immediate:
+    O << MO.getImm();
+    return;
+  case MachineOperand::MO_MachineBasicBlock:
+    printBasicBlockLabel(MO.getMBB());
+    return;
+  case MachineOperand::MO_JumpTableIndex: {
+    bool isMemOp  = Modifier && !strcmp(Modifier, "mem");
+    if (!isMemOp) O << "OFFSET ";
+    O << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
+      << "_" << MO.getIndex();
+    return;
+  }
+  case MachineOperand::MO_ConstantPoolIndex: {
+    bool isMemOp  = Modifier && !strcmp(Modifier, "mem");
+    if (!isMemOp) O << "OFFSET ";
+    O << "[" << TAI->getPrivateGlobalPrefix() << "CPI"
+      << getFunctionNumber() << "_" << MO.getIndex();
+    printOffset(MO.getOffset());
+    O << "]";
+    return;
+  }
+  case MachineOperand::MO_GlobalAddress: {
+    bool isCallOp = Modifier && !strcmp(Modifier, "call");
+    bool isMemOp  = Modifier && !strcmp(Modifier, "mem");
+    GlobalValue *GV = MO.getGlobal();
+    std::string Name = Mang->getValueName(GV);
+
+    decorateName(Name, GV);
+
+    if (!isMemOp && !isCallOp) O << "OFFSET ";
+    if (GV->hasDLLImportLinkage()) {
+      // FIXME: This should be fixed with full support of stdcall & fastcall
+      // CC's
+      O << "__imp_";
+    }
+    O << Name;
+    printOffset(MO.getOffset());
+    return;
+  }
+  case MachineOperand::MO_ExternalSymbol: {
+    bool isCallOp = Modifier && !strcmp(Modifier, "call");
+    if (!isCallOp) O << "OFFSET ";
+    O << TAI->getGlobalPrefix() << MO.getSymbolName();
+    return;
+  }
+  default:
+    O << "<unknown operand type>"; return;
+  }
+}
+
+void X86IntelAsmPrinter::printLeaMemReference(const MachineInstr *MI,
+                                              unsigned Op,
+                                              const char *Modifier) {
+  const MachineOperand &BaseReg  = MI->getOperand(Op);
+  int ScaleVal                   = MI->getOperand(Op+1).getImm();
+  const MachineOperand &IndexReg = MI->getOperand(Op+2);
+  const MachineOperand &DispSpec = MI->getOperand(Op+3);
+
+  O << "[";
+  bool NeedPlus = false;
+  if (BaseReg.getReg()) {
+    printOp(BaseReg, Modifier);
+    NeedPlus = true;
+  }
+
+  if (IndexReg.getReg()) {
+    if (NeedPlus) O << " + ";
+    if (ScaleVal != 1)
+      O << ScaleVal << "*";
+    printOp(IndexReg, Modifier);
+    NeedPlus = true;
+  }
+
+  if (DispSpec.isGlobal() || DispSpec.isCPI() ||
+      DispSpec.isJTI()) {
+    if (NeedPlus)
+      O << " + ";
+    printOp(DispSpec, "mem");
+  } else {
+    int DispVal = DispSpec.getImm();
+    if (DispVal || (!BaseReg.getReg() && !IndexReg.getReg())) {
+      if (NeedPlus) {
+        if (DispVal > 0)
+          O << " + ";
+        else {
+          O << " - ";
+          DispVal = -DispVal;
+        }
+      }
+      O << DispVal;
+    }
+  }
+  O << "]";
+}
+
+void X86IntelAsmPrinter::printMemReference(const MachineInstr *MI, unsigned Op,
+                                           const char *Modifier) {
+  assert(isMem(MI, Op) && "Invalid memory reference!");
+  MachineOperand Segment = MI->getOperand(Op+4);
+  if (Segment.getReg()) {
+      printOperand(MI, Op+4, Modifier);
+      O << ':';
+    }
+  printLeaMemReference(MI, Op, Modifier);
+}
+
+void X86IntelAsmPrinter::printPICJumpTableSetLabel(unsigned uid,
+                                           const MachineBasicBlock *MBB) const {
+  if (!TAI->getSetDirective())
+    return;
+
+  O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
+    << getFunctionNumber() << '_' << uid << "_set_" << MBB->getNumber() << ',';
+  printBasicBlockLabel(MBB, false, false, false);
+  O << '-' << "\"L" << getFunctionNumber() << "$pb\"'\n";
+}
+
+void X86IntelAsmPrinter::printPICLabel(const MachineInstr *MI, unsigned Op) {
+  O << "\"L" << getFunctionNumber() << "$pb\"\n";
+  O << "\"L" << getFunctionNumber() << "$pb\":";
+}
+
+bool X86IntelAsmPrinter::printAsmMRegister(const MachineOperand &MO,
+                                           const char Mode) {
+  unsigned Reg = MO.getReg();
+  switch (Mode) {
+  default: return true;  // Unknown mode.
+  case 'b': // Print QImode register
+    Reg = getX86SubSuperRegister(Reg, MVT::i8);
+    break;
+  case 'h': // Print QImode high register
+    Reg = getX86SubSuperRegister(Reg, MVT::i8, true);
+    break;
+  case 'w': // Print HImode register
+    Reg = getX86SubSuperRegister(Reg, MVT::i16);
+    break;
+  case 'k': // Print SImode register
+    Reg = getX86SubSuperRegister(Reg, MVT::i32);
+    break;
+  }
+
+  O << '%' << TRI->getName(Reg);
+  return false;
+}
+
+/// PrintAsmOperand - Print out an operand for an inline asm expression.
+///
+bool X86IntelAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
+                                         unsigned AsmVariant,
+                                         const char *ExtraCode) {
+  // Does this asm operand have a single letter operand modifier?
+  if (ExtraCode && ExtraCode[0]) {
+    if (ExtraCode[1] != 0) return true; // Unknown modifier.
+
+    switch (ExtraCode[0]) {
+    default: return true;  // Unknown modifier.
+    case 'b': // Print QImode register
+    case 'h': // Print QImode high register
+    case 'w': // Print HImode register
+    case 'k': // Print SImode register
+      return printAsmMRegister(MI->getOperand(OpNo), ExtraCode[0]);
+    }
+  }
+
+  printOperand(MI, OpNo);
+  return false;
+}
+
+bool X86IntelAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
+                                               unsigned OpNo,
+                                               unsigned AsmVariant,
+                                               const char *ExtraCode) {
+  if (ExtraCode && ExtraCode[0])
+    return true; // Unknown modifier.
+  printMemReference(MI, OpNo);
+  return false;
+}
+
+/// printMachineInstruction -- Print out a single X86 LLVM instruction
+/// MI in Intel syntax to the current output stream.
+///
+void X86IntelAsmPrinter::printMachineInstruction(const MachineInstr *MI) {
+  ++EmittedInsts;
+
+  // Call the autogenerated instruction printer routines.
+  printInstruction(MI);
+}
+
+bool X86IntelAsmPrinter::doInitialization(Module &M) {
+  bool Result = AsmPrinter::doInitialization(M);
+
+  Mang->markCharUnacceptable('.');
+
+  O << "\t.686\n\t.model flat\n\n";
+
+  // Emit declarations for external functions.
+  for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
+    if (I->isDeclaration()) {
+      std::string Name = Mang->getValueName(I);
+      decorateName(Name, I);
+
+      O << "\textern " ;
+      if (I->hasDLLImportLinkage()) {
+        O << "__imp_";
+      }
+      O << Name << ":near\n";
+    }
+
+  // Emit declarations for external globals.  Note that VC++ always declares
+  // external globals to have type byte, and if that's good enough for VC++...
+  for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
+       I != E; ++I) {
+    if (I->isDeclaration()) {
+      std::string Name = Mang->getValueName(I);
+
+      O << "\textern " ;
+      if (I->hasDLLImportLinkage()) {
+        O << "__imp_";
+      }
+      O << Name << ":byte\n";
+    }
+  }
+
+  return Result;
+}
+
+bool X86IntelAsmPrinter::doFinalization(Module &M) {
+  const TargetData *TD = TM.getTargetData();
+
+  // Print out module-level global variables here.
+  for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
+       I != E; ++I) {
+    if (I->isDeclaration()) continue;   // External global require no code
+
+    // Check to see if this is a special global used by LLVM, if so, emit it.
+    if (EmitSpecialLLVMGlobal(I))
+      continue;
+
+    std::string name = Mang->getValueName(I);
+    Constant *C = I->getInitializer();
+    unsigned Align = TD->getPreferredAlignmentLog(I);
+    bool bCustomSegment = false;
+
+    switch (I->getLinkage()) {
+    case GlobalValue::CommonLinkage:
+    case GlobalValue::LinkOnceAnyLinkage:
+    case GlobalValue::LinkOnceODRLinkage:
+    case GlobalValue::WeakAnyLinkage:
+    case GlobalValue::WeakODRLinkage:
+      SwitchToDataSection("");
+      O << name << "?\tsegment common 'COMMON'\n";
+      bCustomSegment = true;
+      // FIXME: the default alignment is 16 bytes, but 1, 2, 4, and 256
+      // are also available.
+      break;
+    case GlobalValue::AppendingLinkage:
+      SwitchToDataSection("");
+      O << name << "?\tsegment public 'DATA'\n";
+      bCustomSegment = true;
+      // FIXME: the default alignment is 16 bytes, but 1, 2, 4, and 256
+      // are also available.
+      break;
+    case GlobalValue::DLLExportLinkage:
+      DLLExportedGVs.insert(name);
+      // FALL THROUGH
+    case GlobalValue::ExternalLinkage:
+      O << "\tpublic " << name << "\n";
+      // FALL THROUGH
+    case GlobalValue::InternalLinkage:
+      SwitchToSection(TAI->getDataSection());
+      break;
+    default:
+      assert(0 && "Unknown linkage type!");
+    }
+
+    if (!bCustomSegment)
+      EmitAlignment(Align, I);
+
+    O << name << ":";
+    if (VerboseAsm)
+      O << "\t\t\t\t" << TAI->getCommentString()
+        << " " << I->getName();
+    O << '\n';
+
+    EmitGlobalConstant(C);
+
+    if (bCustomSegment)
+      O << name << "?\tends\n";
+  }
+
+    // Output linker support code for dllexported globals
+  if (!DLLExportedGVs.empty() || !DLLExportedFns.empty()) {
+    SwitchToDataSection("");
+    O << "; WARNING: The following code is valid only with MASM v8.x"
+      << "and (possible) higher\n"
+      << "; This version of MASM is usually shipped with Microsoft "
+      << "Visual Studio 2005\n"
+      << "; or (possible) further versions. Unfortunately, there is no "
+      << "way to support\n"
+      << "; dllexported symbols in the earlier versions of MASM in fully "
+      << "automatic way\n\n";
+    O << "_drectve\t segment info alias('.drectve')\n";
+  }
+
+  for (StringSet<>::iterator i = DLLExportedGVs.begin(),
+         e = DLLExportedGVs.end();
+         i != e; ++i)
+    O << "\t db ' /EXPORT:" << i->getKeyData() << ",data'\n";
+
+  for (StringSet<>::iterator i = DLLExportedFns.begin(),
+         e = DLLExportedFns.end();
+         i != e; ++i)
+    O << "\t db ' /EXPORT:" << i->getKeyData() << "'\n";
+
+  if (!DLLExportedGVs.empty() || !DLLExportedFns.empty())
+    O << "_drectve\t ends\n";
+
+  // Bypass X86SharedAsmPrinter::doFinalization().
+  bool Result = AsmPrinter::doFinalization(M);
+  SwitchToDataSection("");
+  O << "\tend\n";
+  return Result;
+}
+
+void X86IntelAsmPrinter::EmitString(const ConstantArray *CVA) const {
+  unsigned NumElts = CVA->getNumOperands();
+  if (NumElts) {
+    // ML does not have escape sequences except '' for '.  It also has a maximum
+    // string length of 255.
+    unsigned len = 0;
+    bool inString = false;
+    for (unsigned i = 0; i < NumElts; i++) {
+      int n = cast<ConstantInt>(CVA->getOperand(i))->getZExtValue() & 255;
+      if (len == 0)
+        O << "\tdb ";
+
+      if (n >= 32 && n <= 127) {
+        if (!inString) {
+          if (len > 0) {
+            O << ",'";
+            len += 2;
+          } else {
+            O << "'";
+            len++;
+          }
+          inString = true;
+        }
+        if (n == '\'') {
+          O << "'";
+          len++;
+        }
+        O << char(n);
+      } else {
+        if (inString) {
+          O << "'";
+          len++;
+          inString = false;
+        }
+        if (len > 0) {
+          O << ",";
+          len++;
+        }
+        O << n;
+        len += 1 + (n > 9) + (n > 99);
+      }
+
+      if (len > 60) {
+        if (inString) {
+          O << "'";
+          inString = false;
+        }
+        O << "\n";
+        len = 0;
+      }
+    }
+
+    if (len > 0) {
+      if (inString)
+        O << "'";
+      O << "\n";
+    }
+  }
+}
+
+// Include the auto-generated portion of the assembly writer.
+#include "X86GenAsmWriter1.inc"
diff --git a/lib/Target/X86/AsmPrinter/X86IntelAsmPrinter.h b/lib/Target/X86/AsmPrinter/X86IntelAsmPrinter.h
new file mode 100644
index 0000000..9520d98
--- /dev/null
+++ b/lib/Target/X86/AsmPrinter/X86IntelAsmPrinter.h
@@ -0,0 +1,152 @@
+//===-- X86IntelAsmPrinter.h - Convert X86 LLVM code to Intel assembly ----===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Intel assembly code printer class.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef X86INTELASMPRINTER_H
+#define X86INTELASMPRINTER_H
+
+#include "../X86.h"
+#include "../X86MachineFunctionInfo.h"
+#include "../X86TargetMachine.h"
+#include "llvm/CodeGen/AsmPrinter.h"
+#include "llvm/ADT/StringSet.h"
+#include "llvm/Support/Compiler.h"
+#include "llvm/Support/raw_ostream.h"
+
+namespace llvm {
+
+struct VISIBILITY_HIDDEN X86IntelAsmPrinter : public AsmPrinter {
+  explicit X86IntelAsmPrinter(raw_ostream &O, X86TargetMachine &TM,
+                              const TargetAsmInfo *T, CodeGenOpt::Level OL,
+                              bool V)
+    : AsmPrinter(O, TM, T, OL, V) {}
+
+  virtual const char *getPassName() const {
+    return "X86 Intel-Style Assembly Printer";
+  }
+
+  /// printInstruction - This method is automatically generated by tablegen
+  /// from the instruction set description.  This method returns true if the
+  /// machine instruction was sufficiently described to print it, otherwise it
+  /// returns false.
+  bool printInstruction(const MachineInstr *MI);
+
+  // This method is used by the tablegen'erated instruction printer.
+  void printOperand(const MachineInstr *MI, unsigned OpNo,
+                    const char *Modifier = 0) {
+    const MachineOperand &MO = MI->getOperand(OpNo);
+    if (MO.isReg()) {
+      assert(TargetRegisterInfo::isPhysicalRegister(MO.getReg()) &&
+             "Not physreg??");
+      O << TM.getRegisterInfo()->get(MO.getReg()).Name;  // Capitalized names
+    } else {
+      printOp(MO, Modifier);
+    }
+  }
+
+  void printi8mem(const MachineInstr *MI, unsigned OpNo) {
+    O << "BYTE PTR ";
+    printMemReference(MI, OpNo);
+  }
+  void printi16mem(const MachineInstr *MI, unsigned OpNo) {
+    O << "WORD PTR ";
+    printMemReference(MI, OpNo);
+  }
+  void printi32mem(const MachineInstr *MI, unsigned OpNo) {
+    O << "DWORD PTR ";
+    printMemReference(MI, OpNo);
+  }
+  void printi64mem(const MachineInstr *MI, unsigned OpNo) {
+    O << "QWORD PTR ";
+    printMemReference(MI, OpNo);
+  }
+  void printi128mem(const MachineInstr *MI, unsigned OpNo) {
+    O << "XMMWORD PTR ";
+    printMemReference(MI, OpNo);
+  }
+  void printf32mem(const MachineInstr *MI, unsigned OpNo) {
+    O << "DWORD PTR ";
+    printMemReference(MI, OpNo);
+  }
+  void printf64mem(const MachineInstr *MI, unsigned OpNo) {
+    O << "QWORD PTR ";
+    printMemReference(MI, OpNo);
+  }
+  void printf80mem(const MachineInstr *MI, unsigned OpNo) {
+    O << "XWORD PTR ";
+    printMemReference(MI, OpNo);
+  }
+  void printf128mem(const MachineInstr *MI, unsigned OpNo) {
+    O << "XMMWORD PTR ";
+    printMemReference(MI, OpNo);
+  }
+  void printlea32mem(const MachineInstr *MI, unsigned OpNo) {
+    O << "DWORD PTR ";
+    printLeaMemReference(MI, OpNo);
+  }
+  void printlea64mem(const MachineInstr *MI, unsigned OpNo) {
+    O << "QWORD PTR ";
+    printLeaMemReference(MI, OpNo);
+  }
+  void printlea64_32mem(const MachineInstr *MI, unsigned OpNo) {
+    O << "QWORD PTR ";
+    printLeaMemReference(MI, OpNo, "subreg64");
+  }
+
+  bool printAsmMRegister(const MachineOperand &MO, const char Mode);
+  bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
+                       unsigned AsmVariant, const char *ExtraCode);
+  bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
+                             unsigned AsmVariant, const char *ExtraCode);
+  void printMachineInstruction(const MachineInstr *MI);
+  void printOp(const MachineOperand &MO, const char *Modifier = 0);
+  void printSSECC(const MachineInstr *MI, unsigned Op);
+  void printMemReference(const MachineInstr *MI, unsigned Op,
+                         const char *Modifier=NULL);
+  void printLeaMemReference(const MachineInstr *MI, unsigned Op,
+                            const char *Modifier=NULL);
+  void printPICJumpTableSetLabel(unsigned uid,
+                                 const MachineBasicBlock *MBB) const;
+  void printPICJumpTableSetLabel(unsigned uid, unsigned uid2,
+                                 const MachineBasicBlock *MBB) const {
+    AsmPrinter::printPICJumpTableSetLabel(uid, uid2, MBB);
+  }
+  void printPICLabel(const MachineInstr *MI, unsigned Op);
+  bool runOnMachineFunction(MachineFunction &F);
+  bool doInitialization(Module &M);
+  bool doFinalization(Module &M);
+
+  // We have to propagate some information about MachineFunction to
+  // AsmPrinter. It's ok, when we're printing the function, since we have
+  // access to MachineFunction and can get the appropriate MachineFunctionInfo.
+  // Unfortunately, this is not possible when we're printing reference to
+  // Function (e.g. calling it and so on). Even more, there is no way to get the
+  // corresponding MachineFunctions: it can even be not created at all. That's
+  // why we should use additional structure, when we're collecting all necessary
+  // information.
+  //
+  // This structure is using e.g. for name decoration for stdcall & fastcall'ed
+  // function, since we have to use arguments' size for decoration.
+  typedef std::map<const Function*, X86MachineFunctionInfo> FMFInfoMap;
+  FMFInfoMap FunctionInfoMap;
+
+  void decorateName(std::string& Name, const GlobalValue* GV);
+
+  virtual void EmitString(const ConstantArray *CVA) const;
+
+  // Necessary for dllexport support
+  StringSet<> DLLExportedFns, DLLExportedGVs;
+};
+
+} // end namespace llvm
+
+#endif