C++ Triple::isArch64Bit方法代码示例

static std::string getX86TargetCPU(const llvm::Triple &triple)
{
    // Select the default CPU if none was given (or detection failed).

    // Intel Macs are relatively recent, take advantage of that.
    if (triple.isOSDarwin())
        return triple.isArch64Bit() ? "core2" : "yonah";

    // Everything else goes to x86-64 in 64-bit mode.
    if (triple.isArch64Bit())
        return "x86-64";

    if (triple.getOSName().startswith("haiku"))
        return "i586";
    if (triple.getOSName().startswith("openbsd"))
        return "i486";
    if (triple.getOSName().startswith("bitrig"))
        return "i686";
    if (triple.getOSName().startswith("freebsd"))
        return "i486";
    if (triple.getOSName().startswith("netbsd"))
        return "i486";
#if LDC_LLVM_VER >= 302
    // All x86 devices running Android have core2 as their common
    // denominator. This makes a better choice than pentium4.
    if (triple.getEnvironment() == llvm::Triple::Android)
        return "core2";
#endif

    // Fallback to p4.
    return "pentium4";
}

WebAssembly::WebAssembly(const Driver &D, const llvm::Triple &Triple,
                         const llvm::opt::ArgList &Args)
  : ToolChain(D, Triple, Args) {

  assert(Triple.isArch32Bit() != Triple.isArch64Bit());
  getFilePaths().push_back(
      getDriver().SysRoot + "/lib" + (Triple.isArch32Bit() ? "32" : "64"));
}

WebAssembly::WebAssembly(const Driver &D, const llvm::Triple &Triple,
                         const llvm::opt::ArgList &Args)
    : ToolChain(D, Triple, Args) {

  assert(Triple.isArch32Bit() != Triple.isArch64Bit());

  getProgramPaths().push_back(getDriver().getInstalledDir());

  getFilePaths().push_back(getDriver().SysRoot + "/lib");
}

SanitizerKind swift::parseSanitizerArgValues(const llvm::opt::Arg *A,
                                      const llvm::Triple &Triple,
                                      DiagnosticEngine &Diags) {
  SanitizerKind kind = SanitizerKind::None;

  // Find the sanitizer kind.
  SanitizerKind pKind = SanitizerKind::None;
  for (int i = 0, n = A->getNumValues(); i != n; ++i) {
    kind =
    llvm::StringSwitch<SanitizerKind>(A->getValue(i))
      .Case("address", SanitizerKind::Address)
      .Case("thread", SanitizerKind::Thread)
      .Default(SanitizerKind::None);

    if (kind == SanitizerKind::None) {
      Diags.diagnose(SourceLoc(), diag::error_unsupported_option_argument,
        A->getOption().getPrefixedName(), A->getValue(i));
      return kind;
    }

    // Currently, more than one sanitizer cannot be enabled at the same time.
    if (pKind != SanitizerKind::None && pKind != kind) {
      SmallString<128> pb;
      SmallString<128> b;
      Diags.diagnose(SourceLoc(), diag::error_argument_not_allowed_with,
        (A->getOption().getPrefixedName() + toStringRef(pKind)).toStringRef(pb),
        (A->getOption().getPrefixedName() + toStringRef(kind)).toStringRef(b));
    }
    pKind = kind;
  }

  if (kind == SanitizerKind::None)
    return kind;

  // Check if the target is supported for this sanitizer.
  // None of the sanitizers work on Linux right now.
  if (!Triple.isOSDarwin()) {
    SmallString<128> b;
    Diags.diagnose(SourceLoc(), diag::error_unsupported_opt_for_target,
      (A->getOption().getPrefixedName() + toStringRef(kind)).toStringRef(b),
      Triple.getTriple());
  }
  // Thread Sanitizer only works on OS X and the simulators. It's only supported
  // on 64 bit architectures.
  if (kind == SanitizerKind::Thread &&
      (!(Triple.isMacOSX() || tripleIsAnySimulator(Triple)) ||
       !Triple.isArch64Bit())) {
    SmallString<128> b;
    Diags.diagnose(SourceLoc(), diag::error_unsupported_opt_for_target,
      (A->getOption().getPrefixedName() + toStringRef(kind)).toStringRef(b),
      Triple.getTriple());
  }

  return kind;
}

CudaInstallationDetector::CudaInstallationDetector(
    const Driver &D, const llvm::Triple &HostTriple,
    const llvm::opt::ArgList &Args)
    : D(D) {
  struct Candidate {
    std::string Path;
    bool StrictChecking;

    Candidate(std::string Path, bool StrictChecking = false)
        : Path(Path), StrictChecking(StrictChecking) {}
  };
  SmallVector<Candidate, 4> Candidates;

  // In decreasing order so we prefer newer versions to older versions.
  std::initializer_list<const char *> Versions = {"8.0", "7.5", "7.0"};

  if (Args.hasArg(clang::driver::options::OPT_cuda_path_EQ)) {
    Candidates.emplace_back(
        Args.getLastArgValue(clang::driver::options::OPT_cuda_path_EQ).str());
  } else if (HostTriple.isOSWindows()) {
    for (const char *Ver : Versions)
      Candidates.emplace_back(
          D.SysRoot + "/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v" +
          Ver);
  } else {
    if (!Args.hasArg(clang::driver::options::OPT_cuda_path_ignore_env)) {
      // Try to find ptxas binary. If the executable is located in a directory
      // called 'bin/', its parent directory might be a good guess for a valid
      // CUDA installation.
      // However, some distributions might installs 'ptxas' to /usr/bin. In that
      // case the candidate would be '/usr' which passes the following checks
      // because '/usr/include' exists as well. To avoid this case, we always
      // check for the directory potentially containing files for libdevice,
      // even if the user passes -nocudalib.
      if (llvm::ErrorOr<std::string> ptxas =
              llvm::sys::findProgramByName("ptxas")) {
        SmallString<256> ptxasAbsolutePath;
        llvm::sys::fs::real_path(*ptxas, ptxasAbsolutePath);

        StringRef ptxasDir = llvm::sys::path::parent_path(ptxasAbsolutePath);
        if (llvm::sys::path::filename(ptxasDir) == "bin")
          Candidates.emplace_back(llvm::sys::path::parent_path(ptxasDir),
                                  /*StrictChecking=*/true);
      }
    }

    Candidates.emplace_back(D.SysRoot + "/usr/local/cuda");
    for (const char *Ver : Versions)
      Candidates.emplace_back(D.SysRoot + "/usr/local/cuda-" + Ver);

    if (Distro(D.getVFS()).IsDebian())
      // Special case for Debian to have nvidia-cuda-toolkit work
      // out of the box. More info on http://bugs.debian.org/882505
      Candidates.emplace_back(D.SysRoot + "/usr/lib/cuda");
  }

  bool NoCudaLib = Args.hasArg(options::OPT_nocudalib);

  for (const auto &Candidate : Candidates) {
    InstallPath = Candidate.Path;
    if (InstallPath.empty() || !D.getVFS().exists(InstallPath))
      continue;

    BinPath = InstallPath + "/bin";
    IncludePath = InstallPath + "/include";
    LibDevicePath = InstallPath + "/nvvm/libdevice";

    auto &FS = D.getVFS();
    if (!(FS.exists(IncludePath) && FS.exists(BinPath)))
      continue;
    bool CheckLibDevice = (!NoCudaLib || Candidate.StrictChecking);
    if (CheckLibDevice && !FS.exists(LibDevicePath))
      continue;

    // On Linux, we have both lib and lib64 directories, and we need to choose
    // based on our triple.  On MacOS, we have only a lib directory.
    //
    // It's sufficient for our purposes to be flexible: If both lib and lib64
    // exist, we choose whichever one matches our triple.  Otherwise, if only
    // lib exists, we use it.
    if (HostTriple.isArch64Bit() && FS.exists(InstallPath + "/lib64"))
      LibPath = InstallPath + "/lib64";
    else if (FS.exists(InstallPath + "/lib"))
      LibPath = InstallPath + "/lib";
    else
      continue;

    llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> VersionFile =
        FS.getBufferForFile(InstallPath + "/version.txt");
    if (!VersionFile) {
      // CUDA 7.0 doesn't have a version.txt, so guess that's our version if
      // version.txt isn't present.
      Version = CudaVersion::CUDA_70;
    } else {
      Version = ParseCudaVersionFile((*VersionFile)->getBuffer());
    }

    if (Version >= CudaVersion::CUDA_90) {
      // CUDA-9+ uses single libdevice file for all GPU variants.
      std::string FilePath = LibDevicePath + "/libdevice.10.bc";
//.........这里部分代码省略.........

CudaInstallationDetector::CudaInstallationDetector(
    const Driver &D, const llvm::Triple &HostTriple,
    const llvm::opt::ArgList &Args)
    : D(D) {
  SmallVector<std::string, 4> CudaPathCandidates;

  // In decreasing order so we prefer newer versions to older versions.
  std::initializer_list<const char *> Versions = {"8.0", "7.5", "7.0"};

  if (Args.hasArg(clang::driver::options::OPT_cuda_path_EQ)) {
    CudaPathCandidates.push_back(
        Args.getLastArgValue(clang::driver::options::OPT_cuda_path_EQ));
  } else if (HostTriple.isOSWindows()) {
    for (const char *Ver : Versions)
      CudaPathCandidates.push_back(
          D.SysRoot + "/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v" +
          Ver);
  } else {
    CudaPathCandidates.push_back(D.SysRoot + "/usr/local/cuda");
    for (const char *Ver : Versions)
      CudaPathCandidates.push_back(D.SysRoot + "/usr/local/cuda-" + Ver);
  }

  for (const auto &CudaPath : CudaPathCandidates) {
    if (CudaPath.empty() || !D.getVFS().exists(CudaPath))
      continue;

    InstallPath = CudaPath;
    BinPath = CudaPath + "/bin";
    IncludePath = InstallPath + "/include";
    LibDevicePath = InstallPath + "/nvvm/libdevice";

    auto &FS = D.getVFS();
    if (!(FS.exists(IncludePath) && FS.exists(BinPath) &&
          FS.exists(LibDevicePath)))
      continue;

    // On Linux, we have both lib and lib64 directories, and we need to choose
    // based on our triple.  On MacOS, we have only a lib directory.
    //
    // It's sufficient for our purposes to be flexible: If both lib and lib64
    // exist, we choose whichever one matches our triple.  Otherwise, if only
    // lib exists, we use it.
    if (HostTriple.isArch64Bit() && FS.exists(InstallPath + "/lib64"))
      LibPath = InstallPath + "/lib64";
    else if (FS.exists(InstallPath + "/lib"))
      LibPath = InstallPath + "/lib";
    else
      continue;

    llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> VersionFile =
        FS.getBufferForFile(InstallPath + "/version.txt");
    if (!VersionFile) {
      // CUDA 7.0 doesn't have a version.txt, so guess that's our version if
      // version.txt isn't present.
      Version = CudaVersion::CUDA_70;
    } else {
      Version = ParseCudaVersionFile((*VersionFile)->getBuffer());
    }

    std::error_code EC;
    for (llvm::sys::fs::directory_iterator LI(LibDevicePath, EC), LE;
         !EC && LI != LE; LI = LI.increment(EC)) {
      StringRef FilePath = LI->path();
      StringRef FileName = llvm::sys::path::filename(FilePath);
      // Process all bitcode filenames that look like libdevice.compute_XX.YY.bc
      const StringRef LibDeviceName = "libdevice.";
      if (!(FileName.startswith(LibDeviceName) && FileName.endswith(".bc")))
        continue;
      StringRef GpuArch = FileName.slice(
          LibDeviceName.size(), FileName.find('.', LibDeviceName.size()));
      LibDeviceMap[GpuArch] = FilePath.str();
      // Insert map entries for specifc devices with this compute
      // capability. NVCC's choice of the libdevice library version is
      // rather peculiar and depends on the CUDA version.
      if (GpuArch == "compute_20") {
        LibDeviceMap["sm_20"] = FilePath;
        LibDeviceMap["sm_21"] = FilePath;
        LibDeviceMap["sm_32"] = FilePath;
      } else if (GpuArch == "compute_30") {
        LibDeviceMap["sm_30"] = FilePath;
        if (Version < CudaVersion::CUDA_80) {
          LibDeviceMap["sm_50"] = FilePath;
          LibDeviceMap["sm_52"] = FilePath;
          LibDeviceMap["sm_53"] = FilePath;
        }
        LibDeviceMap["sm_60"] = FilePath;
        LibDeviceMap["sm_61"] = FilePath;
        LibDeviceMap["sm_62"] = FilePath;
      } else if (GpuArch == "compute_35") {
        LibDeviceMap["sm_35"] = FilePath;
        LibDeviceMap["sm_37"] = FilePath;
      } else if (GpuArch == "compute_50") {
        if (Version >= CudaVersion::CUDA_80) {
          LibDeviceMap["sm_50"] = FilePath;
          LibDeviceMap["sm_52"] = FilePath;
          LibDeviceMap["sm_53"] = FilePath;
        }
      }
    }
//.........这里部分代码省略.........

OptionSet<SanitizerKind> swift::parseSanitizerArgValues(
    const llvm::opt::ArgList &Args,
    const llvm::opt::Arg *A,
    const llvm::Triple &Triple,
    DiagnosticEngine &Diags,
    llvm::function_ref<bool(llvm::StringRef, bool)> sanitizerRuntimeLibExists) {
  OptionSet<SanitizerKind> sanitizerSet;

  // Find the sanitizer kind.
  for (int i = 0, n = A->getNumValues(); i != n; ++i) {
    auto kind = llvm::StringSwitch<Optional<SanitizerKind>>(A->getValue(i))
        .Case("address", SanitizerKind::Address)
        .Case("thread", SanitizerKind::Thread)
        .Case("fuzzer", SanitizerKind::Fuzzer)
        .Default(None);
    bool isShared = kind && *kind != SanitizerKind::Fuzzer;
    if (!kind) {
      Diags.diagnose(SourceLoc(), diag::error_unsupported_option_argument,
          A->getOption().getPrefixedName(), A->getValue(i));
    } else {
      // Support is determined by existance of the sanitizer library.
      bool sanitizerSupported =
          sanitizerRuntimeLibExists(toFileName(*kind), isShared);

      // TSan is explicitly not supported for 32 bits.
      if (*kind == SanitizerKind::Thread && !Triple.isArch64Bit())
        sanitizerSupported = false;

      if (!sanitizerSupported) {
        SmallString<128> b;
        Diags.diagnose(SourceLoc(), diag::error_unsupported_opt_for_target,
                       (A->getOption().getPrefixedName() + toStringRef(*kind))
                           .toStringRef(b),
                       Triple.getTriple());
      } else {
        sanitizerSet |= *kind;
      }
    }
  }

  // Check that we're one of the known supported targets for sanitizers.
  if (!(Triple.isOSDarwin() || Triple.isOSLinux() || Triple.isOSWindows())) {
    SmallString<128> b;
    Diags.diagnose(SourceLoc(), diag::error_unsupported_opt_for_target,
      (A->getOption().getPrefixedName() +
          StringRef(A->getAsString(Args))).toStringRef(b),
      Triple.getTriple());
  }

  // Address and thread sanitizers can not be enabled concurrently.
  if ((sanitizerSet & SanitizerKind::Thread)
        && (sanitizerSet & SanitizerKind::Address)) {
    SmallString<128> b1;
    SmallString<128> b2;
    Diags.diagnose(SourceLoc(), diag::error_argument_not_allowed_with,
        (A->getOption().getPrefixedName()
            + toStringRef(SanitizerKind::Address)).toStringRef(b1),
        (A->getOption().getPrefixedName()
            + toStringRef(SanitizerKind::Thread)).toStringRef(b2));
  }

  return sanitizerSet;
}

MipsLinkingContext::MipsLinkingContext(llvm::Triple triple)
    : ELFLinkingContext(triple, createTarget(triple, *this)),
      _flagsMerger(triple.isArch64Bit()) {}

static bool isTSanSupported(
    const llvm::Triple &Triple,
    llvm::function_ref<bool(llvm::StringRef)> sanitizerRuntimeLibExists) {

  return Triple.isArch64Bit() && sanitizerRuntimeLibExists("tsan");
}