C++ Triple::getEnvironment方法代码示例

StringRef ARM::computeDefaultTargetABI(const Triple &TT, StringRef CPU) {
  StringRef ArchName =
      CPU.empty() ? TT.getArchName() : getArchName(parseCPUArch(CPU));

  if (TT.isOSBinFormatMachO()) {
    if (TT.getEnvironment() == Triple::EABI ||
        TT.getOS() == Triple::UnknownOS ||
        parseArchProfile(ArchName) == ProfileKind::M)
      return "aapcs";
    if (TT.isWatchABI())
      return "aapcs16";
    return "apcs-gnu";
  } else if (TT.isOSWindows())
    // FIXME: this is invalid for WindowsCE.
    return "aapcs";

  // Select the default based on the platform.
  switch (TT.getEnvironment()) {
  case Triple::Android:
  case Triple::GNUEABI:
  case Triple::GNUEABIHF:
  case Triple::MuslEABI:
  case Triple::MuslEABIHF:
    return "aapcs-linux";
  case Triple::EABIHF:
  case Triple::EABI:
    return "aapcs";
  default:
    if (TT.isOSNetBSD())
      return "apcs-gnu";
    if (TT.isOSOpenBSD())
      return "aapcs-linux";
    return "aapcs";
  }
}

static ARMBaseTargetMachine::ARMABI
computeTargetABI(const Triple &TT, StringRef CPU,
                 const TargetOptions &Options) {
  if (Options.MCOptions.getABIName() == "aapcs16")
    return ARMBaseTargetMachine::ARM_ABI_AAPCS16;
  else if (Options.MCOptions.getABIName().startswith("aapcs"))
    return ARMBaseTargetMachine::ARM_ABI_AAPCS;
  else if (Options.MCOptions.getABIName().startswith("apcs"))
    return ARMBaseTargetMachine::ARM_ABI_APCS;

  assert(Options.MCOptions.getABIName().empty() &&
         "Unknown target-abi option!");

  ARMBaseTargetMachine::ARMABI TargetABI =
      ARMBaseTargetMachine::ARM_ABI_UNKNOWN;

  unsigned ArchKind = ARM::parseCPUArch(CPU);
  StringRef ArchName = ARM::getArchName(ArchKind);
  // FIXME: This is duplicated code from the front end and should be unified.
  if (TT.isOSBinFormatMachO()) {
    if (TT.getEnvironment() == Triple::EABI ||
        (TT.getOS() == Triple::UnknownOS && TT.isOSBinFormatMachO()) ||
        ARM::parseArchProfile(ArchName) == ARM::PK_M) {
      TargetABI = ARMBaseTargetMachine::ARM_ABI_AAPCS;
    } else if (TT.isWatchABI()) {
      TargetABI = ARMBaseTargetMachine::ARM_ABI_AAPCS16;
    } else {
      TargetABI = ARMBaseTargetMachine::ARM_ABI_APCS;
    }
  } else if (TT.isOSWindows()) {
    // FIXME: this is invalid for WindowsCE
    TargetABI = ARMBaseTargetMachine::ARM_ABI_AAPCS;
  } else {
    // Select the default based on the platform.
    switch (TT.getEnvironment()) {
    case Triple::Android:
    case Triple::GNUEABI:
    case Triple::GNUEABIHF:
    case Triple::MuslEABI:
    case Triple::MuslEABIHF:
    case Triple::EABIHF:
    case Triple::EABI:
      TargetABI = ARMBaseTargetMachine::ARM_ABI_AAPCS;
      break;
    case Triple::GNU:
      TargetABI = ARMBaseTargetMachine::ARM_ABI_APCS;
      break;
    default:
      if (TT.isOSNetBSD())
        TargetABI = ARMBaseTargetMachine::ARM_ABI_APCS;
      else
        TargetABI = ARMBaseTargetMachine::ARM_ABI_AAPCS;
      break;
    }
  }

  return TargetABI;
}

static ARMBaseTargetMachine::ARMABI
computeTargetABI(const Triple &TT, StringRef CPU,
                 const TargetOptions &Options) {
  if (Options.MCOptions.getABIName().startswith("aapcs"))
    return ARMBaseTargetMachine::ARM_ABI_AAPCS;
  else if (Options.MCOptions.getABIName().startswith("apcs"))
    return ARMBaseTargetMachine::ARM_ABI_APCS;

  assert(Options.MCOptions.getABIName().empty() &&
         "Unknown target-abi option!");

  ARMBaseTargetMachine::ARMABI TargetABI =
      ARMBaseTargetMachine::ARM_ABI_UNKNOWN;

  // FIXME: This is duplicated code from the front end and should be unified.
  if (TT.isOSBinFormatMachO()) {
    if (TT.getEnvironment() == llvm::Triple::EABI ||
        (TT.getOS() == llvm::Triple::UnknownOS &&
         TT.getObjectFormat() == llvm::Triple::MachO) ||
        CPU.startswith("cortex-m")) {
      TargetABI = ARMBaseTargetMachine::ARM_ABI_AAPCS;
    } else {
      TargetABI = ARMBaseTargetMachine::ARM_ABI_APCS;
    }
  } else if (TT.isOSWindows()) {
    // FIXME: this is invalid for WindowsCE
    TargetABI = ARMBaseTargetMachine::ARM_ABI_AAPCS;
  } else {
    // Select the default based on the platform.
    switch (TT.getEnvironment()) {
    case llvm::Triple::Android:
    case llvm::Triple::GNUEABI:
    case llvm::Triple::GNUEABIHF:
    case llvm::Triple::EABIHF:
    case llvm::Triple::EABI:
      TargetABI = ARMBaseTargetMachine::ARM_ABI_AAPCS;
      break;
    case llvm::Triple::GNU:
      TargetABI = ARMBaseTargetMachine::ARM_ABI_APCS;
      break;
    default:
      if (TT.getOS() == llvm::Triple::NetBSD)
	TargetABI = ARMBaseTargetMachine::ARM_ABI_APCS;
      else
	TargetABI = ARMBaseTargetMachine::ARM_ABI_AAPCS;
      break;
    }
  }

  return TargetABI;
}

X86RegisterInfo::X86RegisterInfo(const Triple &TT)
    : X86GenRegisterInfo((TT.isArch64Bit() ? X86::RIP : X86::EIP),
                         X86_MC::getDwarfRegFlavour(TT, false),
                         X86_MC::getDwarfRegFlavour(TT, true),
                         (TT.isArch64Bit() ? X86::RIP : X86::EIP)) {
  X86_MC::InitLLVM2SEHRegisterMapping(this);

  // Cache some information.
  Is64Bit = TT.isArch64Bit();
  IsWin64 = Is64Bit && TT.isOSWindows();

  // 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.
  if (Is64Bit) {
    SlotSize = 8;
    // This matches the simplified 32-bit pointer code in the data layout
    // computation.
    // FIXME: Should use the data layout?
    bool Use64BitReg = TT.getEnvironment() != Triple::GNUX32;
    StackPtr = Use64BitReg ? X86::RSP : X86::ESP;
    FramePtr = Use64BitReg ? X86::RBP : X86::EBP;
    BasePtr = Use64BitReg ? X86::RBX : X86::EBX;
  } else {
    SlotSize = 4;
    StackPtr = X86::ESP;
    FramePtr = X86::EBP;
    BasePtr = X86::ESI;
  }
}

X86ELFMCAsmInfo::X86ELFMCAsmInfo(const Triple &T) {
  bool is64Bit = T.getArch() == Triple::x86_64;
  bool isX32 = T.getEnvironment() == Triple::GNUX32;

  // For ELF, x86-64 pointer size depends on the ABI.
  // For x86-64 without the x32 ABI, pointer size is 8. For x86 and for x86-64
  // with the x32 ABI, pointer size remains the default 4.
  PointerSize = (is64Bit && !isX32) ? 8 : 4;

  // OTOH, stack slot size is always 8 for x86-64, even with the x32 ABI.
  CalleeSaveStackSlotSize = is64Bit ? 8 : 4;

  AssemblerDialect = AsmWriterFlavor;

  TextAlignFillValue = 0x90;

  // Debug Information
  SupportsDebugInformation = true;

  // Exceptions handling
  ExceptionsType = ExceptionHandling::DwarfCFI;

  // Always enable the integrated assembler by default.
  // Clang also enabled it when the OS is Solaris but that is redundant here.
  UseIntegratedAssembler = true;
}

X86ELFMCAsmInfo::X86ELFMCAsmInfo(const Triple &T) {
  bool is64Bit = T.getArch() == Triple::x86_64;
  bool isX32 = T.getEnvironment() == Triple::GNUX32;

  // For ELF, x86-64 pointer size depends on the ABI.
  // For x86-64 without the x32 ABI, pointer size is 8. For x86 and for x86-64
  // with the x32 ABI, pointer size remains the default 4.
  PointerSize = (is64Bit && !isX32) ? 8 : 4;

  // OTOH, stack slot size is always 8 for x86-64, even with the x32 ABI.
  CalleeSaveStackSlotSize = is64Bit ? 8 : 4;

  AssemblerDialect = AsmWriterFlavor;

  TextAlignFillValue = 0x90;

  // Debug Information
  SupportsDebugInformation = true;

  // Exceptions handling
  ExceptionsType = ExceptionHandling::DwarfCFI;

  // OpenBSD and Bitrig have buggy support for .quad in 32-bit mode, just split
  // into two .words.
  if ((T.isOSOpenBSD() || T.isOSBitrig()) && T.getArch() == Triple::x86)
    Data64bitsDirective = nullptr;

  // Always enable the integrated assembler by default.
  // Clang also enabled it when the OS is Solaris but that is redundant here.
  UseIntegratedAssembler = true;
}

X86ELFMCAsmInfo::X86ELFMCAsmInfo(const Triple &T) {
  bool is64Bit = T.getArch() == Triple::x86_64;
  bool isX32 = T.getEnvironment() == Triple::GNUX32;

  // For ELF, x86-64 pointer size depends on the ABI.
  // For x86-64 without the x32 ABI, pointer size is 8. For x86 and for x86-64
  // with the x32 ABI, pointer size remains the default 4.
  PointerSize = (is64Bit && !isX32) ? 8 : 4;

  // OTOH, stack slot size is always 8 for x86-64, even with the x32 ABI.
  CalleeSaveStackSlotSize = is64Bit ? 8 : 4;

  AssemblerDialect = AsmWriterFlavor;

  TextAlignFillValue = 0x90;

  PrivateGlobalPrefix = ".L";
  WeakRefDirective = "\t.weak\t";

  // Set up DWARF directives
  HasLEB128 = true;  // Target asm supports leb128 directives (little-endian)

  // Debug Information
  SupportsDebugInformation = true;

  // Exceptions handling
  ExceptionsType = ExceptionHandling::DwarfCFI;

  // OpenBSD and Bitrig have buggy support for .quad in 32-bit mode, just split
  // into two .words.
  if ((T.getOS() == Triple::OpenBSD || T.getOS() == Triple::Bitrig) &&
       T.getArch() == Triple::x86)
    Data64bitsDirective = 0;
}

static FloatAbi get_float_abi(const Triple &triple) {
    switch (triple.getOS()) {
        case Triple::Darwin:
        case Triple::MacOSX:
        case Triple::IOS:
            if (get_arm_sub_arch_version(triple) == 6 ||
                get_arm_sub_arch_version(triple) == 7)
            {
                return FloatAbiSoftFp;
            } else {
                return FloatAbiSoft;
            }
        case Triple::Win32:
            return FloatAbiHard;
        case Triple::FreeBSD:
            switch (triple.getEnvironment()) {
                case Triple::GNUEABIHF:
                    return FloatAbiHard;
                default:
                    return FloatAbiSoft;
            }
        default:
            switch (triple.getEnvironment()) {
                case Triple::GNUEABIHF:
                    return FloatAbiHard;
                case Triple::GNUEABI:
                    return FloatAbiSoftFp;
                case Triple::EABIHF:
                    return FloatAbiHard;
                case Triple::EABI:
                    return FloatAbiSoftFp;
                case Triple::Android:
                    if (get_arm_sub_arch_version(triple) == 7) {
                        return FloatAbiSoftFp;
                    } else {
                        return FloatAbiSoft;
                    }
                default:
                    return FloatAbiSoft;
            }
    }
}

std::string X86_MC::ParseX86Triple(const Triple &TT) {
  std::string FS;
  if (TT.getArch() == Triple::x86_64)
    FS = "+64bit-mode,-32bit-mode,-16bit-mode";
  else if (TT.getEnvironment() != Triple::CODE16)
    FS = "-64bit-mode,+32bit-mode,-16bit-mode";
  else
    FS = "-64bit-mode,-32bit-mode,+16bit-mode";

  return FS;
}

  // This is intended for platform as a temporary "XFAIL"
  bool isUnsupportedOSOrEnvironment() {
    Triple Host(Triple::normalize(sys::getProcessTriple()));

    if (find(UnsupportedEnvironments, Host.getEnvironment()) !=
        UnsupportedEnvironments.end())
      return true;

    if (is_contained(UnsupportedOSs, Host.getOS()))
      return true;

    if (is_contained(UnsupportedArchs, Host.getArch()))
      return true;

    return false;
  }

MipsABIInfo MipsABIInfo::computeTargetABI(const Triple &TT, StringRef CPU,
                                          const MCTargetOptions &Options) {
  if (Options.getABIName().startswith("o32"))
    return MipsABIInfo::O32();
  if (Options.getABIName().startswith("n32"))
    return MipsABIInfo::N32();
  if (Options.getABIName().startswith("n64"))
    return MipsABIInfo::N64();
  if (TT.getEnvironment() == llvm::Triple::GNUABIN32)
    return MipsABIInfo::N32();
  assert(Options.getABIName().empty() && "Unknown ABI option for MIPS");

  if (TT.isMIPS64())
    return MipsABIInfo::N64();
  return MipsABIInfo::O32();
}

  // This is intended for platform as a temporary "XFAIL"
  bool isUnsupportedOSOrEnvironment() {
    Triple Host(Triple::normalize(sys::getProcessTriple()));

    if (std::find(UnsupportedEnvironments.begin(), UnsupportedEnvironments.end(),
                  Host.getEnvironment()) != UnsupportedEnvironments.end())
      return true;

    if (std::find(UnsupportedOSs.begin(), UnsupportedOSs.end(), Host.getOS())
        != UnsupportedOSs.end())
      return true;

    if (std::find(UnsupportedArchs.begin(), UnsupportedArchs.end(), Host.getArch())
        != UnsupportedArchs.end())
      return true;

    return false;
  }

static std::string computeDataLayout(const Triple &TT) {
  // X86 is little endian
  std::string Ret = "e";

  Ret += DataLayout::getManglingComponent(TT);
  // X86 and x32 have 32 bit pointers.
  if ((TT.isArch64Bit() &&
       (TT.getEnvironment() == Triple::GNUX32 || TT.isOSNaCl())) ||
      !TT.isArch64Bit())
    Ret += "-p:32:32";

  // Some ABIs align 64 bit integers and doubles to 64 bits, others to 32.
  if (TT.isArch64Bit() || TT.isOSWindows() || TT.isOSNaCl())
    Ret += "-i64:64";
  else if (TT.isOSIAMCU())
    Ret += "-i64:32-f64:32";
  else
    Ret += "-f64:32:64";

  // Some ABIs align long double to 128 bits, others to 32.
  if (TT.isOSNaCl() || TT.isOSIAMCU())
    ; // No f80
  else if (TT.isArch64Bit() || TT.isOSDarwin())
    Ret += "-f80:128";
  else
    Ret += "-f80:32";

  if (TT.isOSIAMCU())
    Ret += "-f128:32";

  // The registers can hold 8, 16, 32 or, in x86-64, 64 bits.
  if (TT.isArch64Bit())
    Ret += "-n8:16:32:64";
  else
    Ret += "-n8:16:32";

  // The stack is aligned to 32 bits on some ABIs and 128 bits on others.
  if ((!TT.isArch64Bit() && TT.isOSWindows()) || TT.isOSIAMCU())
    Ret += "-a:0:32-S32";
  else
    Ret += "-S128";

  return Ret;
}