X86Subtarget::X86Subtarget(const Triple &TT, const std::string &CPU,
                           const std::string &FS, const X86TargetMachine &TM,
                           unsigned StackAlignOverride)
    : X86GenSubtargetInfo(TT, CPU, FS), X86ProcFamily(Others),
      PICStyle(PICStyles::None), TargetTriple(TT),
      StackAlignOverride(StackAlignOverride),
      In64BitMode(TargetTriple.getArch() == Triple::x86_64),
      In32BitMode(TargetTriple.getArch() == Triple::x86 &&
                  TargetTriple.getEnvironment() != Triple::CODE16),
      In16BitMode(TargetTriple.getArch() == Triple::x86 &&
                  TargetTriple.getEnvironment() == Triple::CODE16),
      TSInfo(), InstrInfo(initializeSubtargetDependencies(CPU, FS)),
      TLInfo(TM, *this), FrameLowering(*this, getStackAlignment()) {
  // Determine the PICStyle based on the target selected.
  if (TM.getRelocationModel() == Reloc::Static) {
    // Unless we're in PIC or DynamicNoPIC mode, set the PIC style to None.
    setPICStyle(PICStyles::None);
  } else if (is64Bit()) {
    // PIC in 64 bit mode is always rip-rel.
    setPICStyle(PICStyles::RIPRel);
  } else if (isTargetCOFF()) {
    setPICStyle(PICStyles::None);
  } else if (isTargetDarwin()) {
    if (TM.getRelocationModel() == Reloc::PIC_)
      setPICStyle(PICStyles::StubPIC);
    else {
      assert(TM.getRelocationModel() == Reloc::DynamicNoPIC);
      setPICStyle(PICStyles::StubDynamicNoPIC);
    }
  } else if (isTargetELF()) {
    setPICStyle(PICStyles::GOT);
  }
}

X86RegisterInfo::X86RegisterInfo(X86TargetMachine &tm,
                                 const TargetInstrInfo &tii)
  : X86GenRegisterInfo(tm.getSubtarget<X86Subtarget>().is64Bit()
                         ? X86::RIP : X86::EIP,
                       X86_MC::getDwarfRegFlavour(tm.getTargetTriple(), false),
                       X86_MC::getDwarfRegFlavour(tm.getTargetTriple(), true)),
                       TM(tm), TII(tii) {
  X86_MC::InitLLVM2SEHRegisterMapping(this);

  // Cache some information.
  const X86Subtarget *Subtarget = &TM.getSubtarget<X86Subtarget>();
  Is64Bit = Subtarget->is64Bit();
  IsWin64 = Subtarget->isTargetWin64();

  if (Is64Bit) {
    SlotSize = 8;
    StackPtr = X86::RSP;
    FramePtr = X86::RBP;
  } else {
    SlotSize = 4;
    StackPtr = X86::ESP;
    FramePtr = X86::EBP;
  }
  // Use a callee-saved register as the base pointer.  These registers must
  // not conflict with any ABI requirements.  For example, in 32-bit mode PIC
  // requires GOT in the EBX register before function calls via PLT GOT pointer.
  BasePtr = Is64Bit ? X86::RBX : X86::ESI;
}

X86RegisterInfo::X86RegisterInfo(X86TargetMachine &tm,
                                 const TargetInstrInfo &tii)
  : X86GenRegisterInfo(tm.getSubtarget<X86Subtarget>().is64Bit()
                         ? X86::RIP : X86::EIP,
                       X86_MC::getDwarfRegFlavour(tm.getTargetTriple(), false),
                       X86_MC::getDwarfRegFlavour(tm.getTargetTriple(), true)),
                       TM(tm), TII(tii) {
  X86_MC::InitLLVM2SEHRegisterMapping(this);

  // Cache some information.
  const X86Subtarget *Subtarget = &TM.getSubtarget<X86Subtarget>();
  Is64Bit = Subtarget->is64Bit();
  IsWin64 = Subtarget->isTargetWin64();

  if (Is64Bit) {
    SlotSize = 8;
    StackPtr = X86::RSP;
    FramePtr = X86::RBP;
  } else {
    SlotSize = 4;
    StackPtr = X86::ESP;
    FramePtr = X86::EBP;
  }
}

X86SelectionDAGInfo::X86SelectionDAGInfo(const X86TargetMachine &TM) :
  TargetSelectionDAGInfo(TM),
  Subtarget(&TM.getSubtarget<X86Subtarget>()),
  TLI(*TM.getTargetLowering()) {
}

X86DarwinTargetAsmInfo::X86DarwinTargetAsmInfo(const X86TargetMachine &TM):
  X86TargetAsmInfo<DarwinTargetAsmInfo>(TM) {
  const X86Subtarget* Subtarget = &TM.getSubtarget<X86Subtarget>();
  bool is64Bit = Subtarget->is64Bit();

  AlignmentIsInBytes = false;
  TextAlignFillValue = 0x90;
  GlobalPrefix = "_";
  if (!is64Bit)
    Data64bitsDirective = 0;       // we can't emit a 64-bit unit
  ZeroDirective = "\t.space\t";  // ".space N" emits N zeros.
  PrivateGlobalPrefix = "L";     // Marker for constant pool idxs
  LessPrivateGlobalPrefix = "l";  // Marker for some ObjC metadata
  BSSSection = 0;                       // no BSS section.
  ZeroFillDirective = "\t.zerofill\t";  // Uses .zerofill
  if (TM.getRelocationModel() != Reloc::Static)
    ConstantPoolSection = "\t.const_data";
  else
    ConstantPoolSection = "\t.const\n";
  JumpTableDataSection = "\t.const\n";
  CStringSection = "\t.cstring";
  // FIXME: Why don't always use this section?
  if (is64Bit) {
    SixteenByteConstantSection = getUnnamedSection("\t.literal16\n",
                                                   SectionFlags::Mergeable);
  }
  LCOMMDirective = "\t.lcomm\t";
  SwitchToSectionDirective = "\t.section ";
  StringConstantPrefix = "\1LC";
  // Leopard and above support aligned common symbols.
  COMMDirectiveTakesAlignment = (Subtarget->getDarwinVers() >= 9);
  HasDotTypeDotSizeDirective = false;
  HasSingleParameterDotFile = false;
  NonLocalEHFrameLabel = true;
  if (TM.getRelocationModel() == Reloc::Static) {
    StaticCtorsSection = ".constructor";
    StaticDtorsSection = ".destructor";
  } else {
    StaticCtorsSection = ".mod_init_func";
    StaticDtorsSection = ".mod_term_func";
  }
  if (is64Bit) {
    PersonalityPrefix = "";
    PersonalitySuffix = "[email protected]";
  } else {
    PersonalityPrefix = "L";
    PersonalitySuffix = "$non_lazy_ptr";
  }
  NeedsIndirectEncoding = true;
  InlineAsmStart = "## InlineAsm Start";
  InlineAsmEnd = "## InlineAsm End";
  CommentString = "##";
  SetDirective = "\t.set";
  PCSymbol = ".";
  UsedDirective = "\t.no_dead_strip\t";
  WeakDefDirective = "\t.weak_definition ";
  WeakRefDirective = "\t.weak_reference ";
  HiddenDirective = "\t.private_extern ";
  ProtectedDirective = "\t.globl\t";

  // In non-PIC modes, emit a special label before jump tables so that the
  // linker can perform more accurate dead code stripping.
  if (TM.getRelocationModel() != Reloc::PIC_) {
    // Emit a local label that is preserved until the linker runs.
    JumpTableSpecialLabelPrefix = "l";
  }

  SupportsDebugInformation = true;
  NeedsSet = true;
  DwarfAbbrevSection = ".section __DWARF,__debug_abbrev,regular,debug";
  DwarfInfoSection = ".section __DWARF,__debug_info,regular,debug";
  DwarfLineSection = ".section __DWARF,__debug_line,regular,debug";
  DwarfFrameSection = ".section __DWARF,__debug_frame,regular,debug";
  DwarfPubNamesSection = ".section __DWARF,__debug_pubnames,regular,debug";
  DwarfPubTypesSection = ".section __DWARF,__debug_pubtypes,regular,debug";
  DwarfDebugInlineSection = ".section __DWARF,__debug_inlined,regular,debug";
  DwarfUsesInlineInfoSection = true;
  DwarfStrSection = ".section __DWARF,__debug_str,regular,debug";
  DwarfLocSection = ".section __DWARF,__debug_loc,regular,debug";
  DwarfARangesSection = ".section __DWARF,__debug_aranges,regular,debug";
  DwarfRangesSection = ".section __DWARF,__debug_ranges,regular,debug";
  DwarfMacInfoSection = ".section __DWARF,__debug_macinfo,regular,debug";

  // Exceptions handling
  SupportsExceptionHandling = true;
  GlobalEHDirective = "\t.globl\t";
  SupportsWeakOmittedEHFrame = false;
  AbsoluteEHSectionOffsets = false;
  DwarfEHFrameSection =
  ".section __TEXT,__eh_frame,coalesced,no_toc+strip_static_syms+live_support";
  DwarfExceptionSection = ".section __DATA,__gcc_except_tab";
}