C++ Triple类代码示例

static PPCTargetMachine::PPCABI computeTargetABI(const Triple &TT,
                                                 const TargetOptions &Options) {
  if (Options.MCOptions.getABIName().startswith("elfv1"))
    return PPCTargetMachine::PPC_ABI_ELFv1;
  else if (Options.MCOptions.getABIName().startswith("elfv2"))
    return PPCTargetMachine::PPC_ABI_ELFv2;

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

  if (!TT.isMacOSX()) {
    switch (TT.getArch()) {
    case Triple::ppc64le:
      return PPCTargetMachine::PPC_ABI_ELFv2;
    case Triple::ppc64:
      return PPCTargetMachine::PPC_ABI_ELFv1;
    default:
      // Fallthrough.
      ;
    }
  }
  return PPCTargetMachine::PPC_ABI_UNKNOWN;
}

PPCMCAsmInfoDarwin::PPCMCAsmInfoDarwin(bool is64Bit, const Triple& T) {
  if (is64Bit) {
    PointerSize = CalleeSaveStackSlotSize = 8;
  }
  IsLittleEndian = false;

  CommentString = ";";
  ExceptionsType = ExceptionHandling::DwarfCFI;

  if (!is64Bit)
    Data64bitsDirective = 0;      // We can't emit a 64-bit unit in PPC32 mode.

  AssemblerDialect = 1;           // New-Style mnemonics.
  SupportsDebugInformation= true; // Debug information.

  // The installed assembler for OSX < 10.6 lacks some directives.
  // FIXME: this should really be a check on the assembler characteristics
  // rather than OS version
  if (T.isMacOSX() && T.isMacOSXVersionLT(10, 6))
    HasWeakDefCanBeHiddenDirective = false;

  UseIntegratedAssembler = true;
}

bool NameServiceOnTriples::cmdCheck(NameTripleState& act) {
    lock();
    if (act.reply.size()==0) {
        act.reply.addString("old");
    }
    ConstString port = act.cmd.get(1).asString();
    ConstString key = act.cmd.get(2).toString();
    ConstString val = act.cmd.get(3).toString();
    Triple t;
    t.setNameValue("port",port.c_str());
    int result = act.mem.find(t, YARP_NULLPTR);
    if (result==-1) {
        unlock();
        return false;
    }
    TripleContext context;
    context.setRid(result);
    t.setNameValue(key.c_str(),"*");
    list<Triple> lst = act.mem.query(t,&context);
    Bottle& q = act.reply.addList();
    q.addString("port");
    q.addString(port);
    q.addString("property");
    q.addString(key);
    q.addString("value");
    q.addString(val);
    q.addString("present");
    ConstString present = "false";
    for (list<Triple>::iterator it=lst.begin(); it!=lst.end(); it++) {
        if (val == it->value.c_str()) {
            present = "true";
        }
    }
    q.addString(present);
    unlock();
    return true;
}

Expected<std::unique_ptr<LazyCallThroughManager>>
createLocalLazyCallThroughManager(const Triple &T, ExecutionSession &ES,
                                  JITTargetAddress ErrorHandlerAddr) {
  switch (T.getArch()) {
  default:
    return make_error<StringError>(
        std::string("No callback manager available for ") + T.str(),
        inconvertibleErrorCode());

  case Triple::aarch64:
    return LocalLazyCallThroughManager::Create<OrcAArch64>(ES,
                                                           ErrorHandlerAddr);

  case Triple::x86:
    return LocalLazyCallThroughManager::Create<OrcI386>(ES, ErrorHandlerAddr);

  case Triple::mips:
    return LocalLazyCallThroughManager::Create<OrcMips32Be>(ES,
                                                            ErrorHandlerAddr);

  case Triple::mipsel:
    return LocalLazyCallThroughManager::Create<OrcMips32Le>(ES,
                                                            ErrorHandlerAddr);

  case Triple::mips64:
  case Triple::mips64el:
    return LocalLazyCallThroughManager::Create<OrcMips64>(ES, ErrorHandlerAddr);

  case Triple::x86_64:
    if (T.getOS() == Triple::OSType::Win32)
      return LocalLazyCallThroughManager::Create<OrcX86_64_Win32>(
          ES, ErrorHandlerAddr);
    else
      return LocalLazyCallThroughManager::Create<OrcX86_64_SysV>(
          ES, ErrorHandlerAddr);
  }
}

MipsMCAsmInfo::MipsMCAsmInfo(const Triple &TheTriple) {
  if ((TheTriple.getArch() == Triple::mips) ||
      (TheTriple.getArch() == Triple::mips64))
    IsLittleEndian = false;

  if ((TheTriple.getArch() == Triple::mips64el) ||
      (TheTriple.getArch() == Triple::mips64)) {
    PointerSize = CalleeSaveStackSlotSize = 8;
  }

  // FIXME: This condition isn't quite right but it's the best we can do until
  //        this object can identify the ABI. It will misbehave when using O32
  //        on a mips64*-* triple.
  if ((TheTriple.getArch() == Triple::mipsel) ||
      (TheTriple.getArch() == Triple::mips)) {
    PrivateGlobalPrefix = "$";
    PrivateLabelPrefix = "$";
  }

  AlignmentIsInBytes          = false;
  Data16bitsDirective         = "\t.2byte\t";
  Data32bitsDirective         = "\t.4byte\t";
  Data64bitsDirective         = "\t.8byte\t";
  CommentString               = "#";
  ZeroDirective               = "\t.space\t";
  GPRel32Directive            = "\t.gpword\t";
  GPRel64Directive            = "\t.gpdword\t";
  UseAssignmentForEHBegin = true;
  SupportsDebugInformation = true;
  ExceptionsType = ExceptionHandling::DwarfCFI;
  DwarfRegNumForCFI = true;

  // Enable IAS by default for O32.
  if (TheTriple.getArch() == Triple::mips ||
      TheTriple.getArch() == Triple::mipsel)
    UseIntegratedAssembler = true;
}

OrcLazyJIT::CallbackManagerBuilder
OrcLazyJIT::createCallbackManagerBuilder(Triple T) {
  switch (T.getArch()) {
    default: return nullptr;

    case Triple::x86_64: {
      typedef orc::JITCompileCallbackManager<CompileLayerT,
                                             orc::OrcX86_64> CCMgrT;
      return [](CompileLayerT &CompileLayer, RuntimeDyld::MemoryManager &MemMgr,
                LLVMContext &Context) {
               return make_unique<CCMgrT>(CompileLayer, MemMgr, Context, 0, 64);
             };
    }
  }
}

X86MCAsmInfoMicrosoft::X86MCAsmInfoMicrosoft(const Triple &Triple) {
  if (Triple.getArch() == Triple::x86_64) {
    PrivateGlobalPrefix = ".L";
    PointerSize = 8;
    ExceptionsType = ExceptionHandling::WinEH;
  }

  AssemblerDialect = AsmWriterFlavor;

  TextAlignFillValue = 0x90;

  AllowAtInName = true;

  UseIntegratedAssembler = true;
}

Triple ObjectFile::makeTriple() const {
  Triple TheTriple;
  auto Arch = getArch();
  TheTriple.setArch(Triple::ArchType(Arch));

  // For ARM targets, try to use the build attributes to build determine
  // the build target. Target features are also added, but later during
  // disassembly.
  if (Arch == Triple::arm || Arch == Triple::armeb)
    setARMSubArch(TheTriple);

  // TheTriple defaults to ELF, and COFF doesn't have an environment:
  // the best we can do here is indicate that it is mach-o.
  if (isMachO())
    TheTriple.setObjectFormat(Triple::MachO);

  if (isCOFF()) {
    const auto COFFObj = dyn_cast<COFFObjectFile>(this);
    if (COFFObj->getArch() == Triple::thumb)
      TheTriple.setTriple("thumbv7-windows");
  }

  return TheTriple;
}

static Triple::ObjectFormatType getDefaultFormat(const Triple &T) {
  switch (T.getArch()) {
  default:
    break;
  case Triple::hexagon:
  case Triple::mips:
  case Triple::mipsel:
  case Triple::mips64:
  case Triple::mips64el:
  case Triple::r600:
  case Triple::amdgcn:
  case Triple::sparc:
  case Triple::sparcv9:
  case Triple::systemz:
  case Triple::xcore:
  case Triple::ppc64le:
    return Triple::ELF;

  case Triple::ppc:
  case Triple::ppc64:
    if (T.isOSDarwin())
      return Triple::MachO;
    return Triple::ELF;

  case Triple::wasm32:
  case Triple::wasm64:
    // Unknown for now, until an object format is specified.
    return Triple::UnknownObjectFormat;
  }

  if (T.isOSDarwin())
    return Triple::MachO;
  else if (T.isOSWindows())
    return Triple::COFF;
  return Triple::ELF;
}

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;
}

NVPTXTargetMachine::NVPTXTargetMachine(const Target &T, const Triple &TT,
                                       StringRef CPU, StringRef FS,
                                       const TargetOptions &Options,
                                       Reloc::Model RM, CodeModel::Model CM,
                                       CodeGenOpt::Level OL, bool is64bit)
    : LLVMTargetMachine(T, computeDataLayout(is64bit), TT, CPU, FS, Options, RM,
                        CM, OL),
      is64bit(is64bit), TLOF(make_unique<NVPTXTargetObjectFile>()),
      Subtarget(TT, CPU, FS, *this) {
  if (TT.getOS() == Triple::NVCL)
    drvInterface = NVPTX::NVCL;
  else
    drvInterface = NVPTX::CUDA;
  initAsmInfo();
}

int main(int argc, char **argv) {
  // Print a stack trace if we signal out.
  sys::PrintStackTraceOnErrorSignal();
  PrettyStackTraceProgram X(argc, argv);

  llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
  cl::ParseCommandLineOptions(argc, argv, "llvm object size dumper\n");

  ToolName = argv[0];
  if (OutputFormatShort.getNumOccurrences())
    OutputFormat = OutputFormatShort;
  if (RadixShort.getNumOccurrences())
    Radix = RadixShort;

  for (unsigned i = 0; i < ArchFlags.size(); ++i) {
    if (ArchFlags[i] == "all") {
      ArchAll = true;
    } else {
      Triple T = MachOObjectFile::getArch(ArchFlags[i]);
      if (T.getArch() == Triple::UnknownArch) {
        outs() << ToolName << ": for the -arch option: Unknown architecture "
               << "named '" << ArchFlags[i] << "'";
        return 1;
      }
    }
  }

  if (InputFilenames.size() == 0)
    InputFilenames.push_back("a.out");

  moreThanOneFile = InputFilenames.size() > 1;
  std::for_each(InputFilenames.begin(), InputFilenames.end(),
                PrintFileSectionSizes);

  return 0;
}

X86ELFMCAsmInfo::X86ELFMCAsmInfo(const Triple &T) {
  AsmTransCBE = x86_asm_table;
  AssemblerDialect = AsmWriterFlavor;

  TextAlignFillValue = 0x90;

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

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

  // Debug Information
  SupportsDebugInformation = true;

  // Exceptions handling
  ExceptionsType = ExceptionHandling::Dwarf;
  
  // OpenBSD has buggy support for .quad in 32-bit mode, just split into two
  // .words.
  if (T.getOS() == Triple::OpenBSD && T.getArch() == Triple::x86)
    Data64bitsDirective = 0;
}

static std::unique_ptr<TargetLoweringObjectFile> createTLOF(const Triple &TT) {
  if (TT.isOSBinFormatMachO()) {
    if (TT.getArch() == Triple::x86_64)
      return make_unique<X86_64MachoTargetObjectFile>();
    return make_unique<TargetLoweringObjectFileMachO>();
  }

  if (TT.isOSLinux() || TT.isOSNaCl())
    return make_unique<X86LinuxNaClTargetObjectFile>();
  if (TT.isOSBinFormatELF())
    return make_unique<X86ELFTargetObjectFile>();
  if (TT.isKnownWindowsMSVCEnvironment() || TT.isWindowsCoreCLREnvironment())
    return make_unique<X86WindowsTargetObjectFile>();
  if (TT.isOSBinFormatCOFF())
    return make_unique<TargetLoweringObjectFileCOFF>();
  llvm_unreachable("unknown subtarget type");
}

/// Create an WebAssembly architecture model.
///
WebAssemblyTargetMachine::WebAssemblyTargetMachine(
    const Target &T, const Triple &TT, StringRef CPU, StringRef FS,
    const TargetOptions &Options, Reloc::Model RM, CodeModel::Model CM,
    CodeGenOpt::Level OL)
    : LLVMTargetMachine(T, TT.isArch64Bit()
                               ? "e-p:64:64-i64:64-v128:8:128-n32:64-S128"
                               : "e-p:32:32-i64:64-v128:8:128-n32:64-S128",
                        TT, CPU, FS, Options, RM, CM, OL),
      TLOF(make_unique<WebAssemblyTargetObjectFile>()) {
  initAsmInfo();

  // We need a reducible CFG, so disable some optimizations which tend to
  // introduce irreducibility.
  setRequiresStructuredCFG(true);
}