C++ llvm::Triple类代码示例

void InitHeaderSearch::AddDefaultCIncludePaths(const llvm::Triple &triple,
                                            const HeaderSearchOptions &HSOpts) {
  llvm::Triple::OSType os = triple.getOS();

  switch (os) {
  case llvm::Triple::FreeBSD:
  case llvm::Triple::NetBSD:
    break;
  default:
    // FIXME: temporary hack: hard-coded paths.
    AddPath("/usr/local/include", System, true, false, false);
    break;
  }

  // Builtin includes use #include_next directives and should be positioned
  // just prior C include dirs.
  if (HSOpts.UseBuiltinIncludes) {
    // Ignore the sys root, we *always* look for clang headers relative to
    // supplied path.
    llvm::sys::Path P(HSOpts.ResourceDir);
    P.appendComponent("include");
    AddPath(P.str(), System, false, false, false, /*IgnoreSysRoot=*/ true);
  }

  // Add dirs specified via 'configure --with-c-include-dirs'.
  StringRef CIncludeDirs(C_INCLUDE_DIRS);
  if (CIncludeDirs != "") {
    SmallVector<StringRef, 5> dirs;
    CIncludeDirs.split(dirs, ":");
    for (SmallVectorImpl<StringRef>::iterator i = dirs.begin();
         i != dirs.end();
         ++i)
      AddPath(*i, System, false, false, false);
    return;
  }

  switch (os) {
  case llvm::Triple::Win32: {
    std::string VSDir;
    std::string WindowsSDKDir;
    if (getVisualStudioDir(VSDir)) {
      AddPath(VSDir + "\\VC\\include", System, false, false, false);
      if (getWindowsSDKDir(WindowsSDKDir))
        AddPath(WindowsSDKDir + "\\include", System, false, false, false);
      else
        AddPath(VSDir + "\\VC\\PlatformSDK\\Include",
                System, false, false, false);
    } else {
      // Default install paths.
      AddPath("C:/Program Files/Microsoft Visual Studio 10.0/VC/include",
              System, false, false, false);
      AddPath("C:/Program Files/Microsoft Visual Studio 9.0/VC/include",
              System, false, false, false);
      AddPath(
        "C:/Program Files/Microsoft Visual Studio 9.0/VC/PlatformSDK/Include",
        System, false, false, false);
      AddPath("C:/Program Files/Microsoft Visual Studio 8/VC/include",
              System, false, false, false);
      AddPath(
        "C:/Program Files/Microsoft Visual Studio 8/VC/PlatformSDK/Include",
        System, false, false, false);
    }
    break;
  }
  case llvm::Triple::Haiku:
    AddPath("/boot/common/include", System, true, false, false);
    AddPath("/boot/develop/headers/os", System, true, false, false);
    AddPath("/boot/develop/headers/os/app", System, true, false, false);
    AddPath("/boot/develop/headers/os/arch", System, true, false, false);
    AddPath("/boot/develop/headers/os/device", System, true, false, false);
    AddPath("/boot/develop/headers/os/drivers", System, true, false, false);
    AddPath("/boot/develop/headers/os/game", System, true, false, false);
    AddPath("/boot/develop/headers/os/interface", System, true, false, false);
    AddPath("/boot/develop/headers/os/kernel", System, true, false, false);
    AddPath("/boot/develop/headers/os/locale", System, true, false, false);
    AddPath("/boot/develop/headers/os/mail", System, true, false, false);
    AddPath("/boot/develop/headers/os/media", System, true, false, false);
    AddPath("/boot/develop/headers/os/midi", System, true, false, false);
    AddPath("/boot/develop/headers/os/midi2", System, true, false, false);
    AddPath("/boot/develop/headers/os/net", System, true, false, false);
    AddPath("/boot/develop/headers/os/storage", System, true, false, false);
    AddPath("/boot/develop/headers/os/support", System, true, false, false);
    AddPath("/boot/develop/headers/os/translation",
      System, true, false, false);
    AddPath("/boot/develop/headers/os/add-ons/graphics",
      System, true, false, false);
    AddPath("/boot/develop/headers/os/add-ons/input_server",
      System, true, false, false);
    AddPath("/boot/develop/headers/os/add-ons/screen_saver",
      System, true, false, false);
    AddPath("/boot/develop/headers/os/add-ons/tracker",
      System, true, false, false);
    AddPath("/boot/develop/headers/os/be_apps/Deskbar",
      System, true, false, false);
    AddPath("/boot/develop/headers/os/be_apps/NetPositive",
      System, true, false, false);
    AddPath("/boot/develop/headers/os/be_apps/Tracker",
      System, true, false, false);
    AddPath("/boot/develop/headers/cpp", System, true, false, false);
    AddPath("/boot/develop/headers/cpp/i586-pc-haiku",
//.........这里部分代码省略.........

ARMTargetInfo::ARMTargetInfo(const llvm::Triple &Triple,
                             const TargetOptions &Opts)
    : TargetInfo(Triple), FPMath(FP_Default), IsAAPCS(true), LDREX(0),
      HW_FP(0) {
  bool IsOpenBSD = Triple.isOSOpenBSD();
  bool IsNetBSD = Triple.isOSNetBSD();

  // FIXME: the isOSBinFormatMachO is a workaround for identifying a Darwin-like
  // environment where size_t is `unsigned long` rather than `unsigned int`

  PtrDiffType = IntPtrType =
      (Triple.isOSDarwin() || Triple.isOSBinFormatMachO() || IsOpenBSD ||
       IsNetBSD)
          ? SignedLong
          : SignedInt;

  SizeType = (Triple.isOSDarwin() || Triple.isOSBinFormatMachO() || IsOpenBSD ||
              IsNetBSD)
                 ? UnsignedLong
                 : UnsignedInt;

  // ptrdiff_t is inconsistent on Darwin
  if ((Triple.isOSDarwin() || Triple.isOSBinFormatMachO()) &&
      !Triple.isWatchABI())
    PtrDiffType = SignedInt;

  // Cache arch related info.
  setArchInfo();

  // {} in inline assembly are neon specifiers, not assembly variant
  // specifiers.
  NoAsmVariants = true;

  // FIXME: This duplicates code from the driver that sets the -target-abi
  // option - this code is used if -target-abi isn't passed and should
  // be unified in some way.
  if (Triple.isOSBinFormatMachO()) {
    // The backend is hardwired to assume AAPCS for M-class processors, ensure
    // the frontend matches that.
    if (Triple.getEnvironment() == llvm::Triple::EABI ||
        Triple.getOS() == llvm::Triple::UnknownOS ||
        ArchProfile == llvm::ARM::ProfileKind::M) {
      setABI("aapcs");
    } else if (Triple.isWatchABI()) {
      setABI("aapcs16");
    } else {
      setABI("apcs-gnu");
    }
  } else if (Triple.isOSWindows()) {
    // FIXME: this is invalid for WindowsCE
    setABI("aapcs");
  } else {
    // Select the default based on the platform.
    switch (Triple.getEnvironment()) {
    case llvm::Triple::Android:
    case llvm::Triple::GNUEABI:
    case llvm::Triple::GNUEABIHF:
    case llvm::Triple::MuslEABI:
    case llvm::Triple::MuslEABIHF:
      setABI("aapcs-linux");
      break;
    case llvm::Triple::EABIHF:
    case llvm::Triple::EABI:
      setABI("aapcs");
      break;
    case llvm::Triple::GNU:
      setABI("apcs-gnu");
      break;
    default:
      if (IsNetBSD)
        setABI("apcs-gnu");
      else if (IsOpenBSD)
        setABI("aapcs-linux");
      else
        setABI("aapcs");
      break;
    }
  }

  // ARM targets default to using the ARM C++ ABI.
  TheCXXABI.set(TargetCXXABI::GenericARM);

  // ARM has atomics up to 8 bytes
  setAtomic();

  // Maximum alignment for ARM NEON data types should be 64-bits (AAPCS)
  if (IsAAPCS && (Triple.getEnvironment() != llvm::Triple::Android))
    MaxVectorAlign = 64;

  // Do force alignment of members that follow zero length bitfields.  If
  // the alignment of the zero-length bitfield is greater than the member
  // that follows it, `bar', `bar' will be aligned as the  type of the
  // zero length bitfield.
  UseZeroLengthBitfieldAlignment = true;

  if (Triple.getOS() == llvm::Triple::Linux ||
      Triple.getOS() == llvm::Triple::UnknownOS)
    this->MCountName = Opts.EABIVersion == llvm::EABI::GNU
                           ? "\01__gnu_mcount_nc"
                           : "\01mcount";
//.........这里部分代码省略.........

Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
    : Generic_ELF(D, Triple, Args) {
  GCCInstallation.init(Triple, Args);
  Multilibs = GCCInstallation.getMultilibs();
  llvm::Triple::ArchType Arch = Triple.getArch();
  std::string SysRoot = computeSysRoot();

  // Cross-compiling binutils and GCC installations (vanilla and openSUSE at
  // least) put various tools in a triple-prefixed directory off of the parent
  // of the GCC installation. We use the GCC triple here to ensure that we end
  // up with tools that support the same amount of cross compiling as the
  // detected GCC installation. For example, if we find a GCC installation
  // targeting x86_64, but it is a bi-arch GCC installation, it can also be
  // used to target i386.
  // FIXME: This seems unlikely to be Linux-specific.
  ToolChain::path_list &PPaths = getProgramPaths();
  PPaths.push_back(Twine(GCCInstallation.getParentLibPath() + "/../" +
                         GCCInstallation.getTriple().str() + "/bin")
                       .str());

  Distro Distro(D.getVFS());

  if (Distro.IsOpenSUSE() || Distro.IsUbuntu()) {
    ExtraOpts.push_back("-z");
    ExtraOpts.push_back("relro");
  }

  if (Arch == llvm::Triple::arm || Arch == llvm::Triple::thumb)
    ExtraOpts.push_back("-X");

  const bool IsAndroid = Triple.isAndroid();
  const bool IsMips = tools::isMipsArch(Arch);
  const bool IsHexagon = Arch == llvm::Triple::hexagon;

  if (IsMips && !SysRoot.empty())
    ExtraOpts.push_back("--sysroot=" + SysRoot);

  // Do not use 'gnu' hash style for Mips targets because .gnu.hash
  // and the MIPS ABI require .dynsym to be sorted in different ways.
  // .gnu.hash needs symbols to be grouped by hash code whereas the MIPS
  // ABI requires a mapping between the GOT and the symbol table.
  // Android loader does not support .gnu.hash.
  // Hexagon linker/loader does not support .gnu.hash
  if (!IsMips && !IsAndroid && !IsHexagon) {
    if (Distro.IsRedhat() || Distro.IsOpenSUSE() ||
        (Distro.IsUbuntu() && Distro >= Distro::UbuntuMaverick))
      ExtraOpts.push_back("--hash-style=gnu");

    if (Distro.IsDebian() || Distro.IsOpenSUSE() || Distro == Distro::UbuntuLucid ||
        Distro == Distro::UbuntuJaunty || Distro == Distro::UbuntuKarmic)
      ExtraOpts.push_back("--hash-style=both");
  }

  if (Distro.IsRedhat() && Distro != Distro::RHEL5 && Distro != Distro::RHEL6)
    ExtraOpts.push_back("--no-add-needed");

#ifdef ENABLE_LINKER_BUILD_ID
  ExtraOpts.push_back("--build-id");
#endif

  if (Distro.IsOpenSUSE())
    ExtraOpts.push_back("--enable-new-dtags");

  // The selection of paths to try here is designed to match the patterns which
  // the GCC driver itself uses, as this is part of the GCC-compatible driver.
  // This was determined by running GCC in a fake filesystem, creating all
  // possible permutations of these directories, and seeing which ones it added
  // to the link paths.
  path_list &Paths = getFilePaths();

  const std::string OSLibDir = getOSLibDir(Triple, Args);
  const std::string MultiarchTriple = getMultiarchTriple(D, Triple, SysRoot);

  // Add the multilib suffixed paths where they are available.
  if (GCCInstallation.isValid()) {
    const llvm::Triple &GCCTriple = GCCInstallation.getTriple();
    const std::string &LibPath = GCCInstallation.getParentLibPath();
    const Multilib &Multilib = GCCInstallation.getMultilib();
    const MultilibSet &Multilibs = GCCInstallation.getMultilibs();

    // Add toolchain / multilib specific file paths.
    addMultilibsFilePaths(D, Multilibs, Multilib,
                          GCCInstallation.getInstallPath(), Paths);

    // Sourcery CodeBench MIPS toolchain holds some libraries under
    // a biarch-like suffix of the GCC installation.
    addPathIfExists(D, GCCInstallation.getInstallPath() + Multilib.gccSuffix(),
                    Paths);

    // GCC cross compiling toolchains will install target libraries which ship
    // as part of the toolchain under <prefix>/<triple>/<libdir> rather than as
    // any part of the GCC installation in
    // <prefix>/<libdir>/gcc/<triple>/<version>. This decision is somewhat
    // debatable, but is the reality today. We need to search this tree even
    // when we have a sysroot somewhere else. It is the responsibility of
    // whomever is doing the cross build targeting a sysroot using a GCC
    // installation that is *not* within the system root to ensure two things:
    //
    //  1) Any DSOs that are linked in from this tree or from the install path
    //     above must be present on the system root and found via an
//.........这里部分代码省略.........

void InitHeaderSearch::AddDefaultCIncludePaths(const llvm::Triple &triple,
                                            const HeaderSearchOptions &HSOpts) {
  llvm::Triple::OSType os = triple.getOS();

  if (HSOpts.UseStandardSystemIncludes) {
    switch (os) {
    case llvm::Triple::CloudABI:
    case llvm::Triple::FreeBSD:
    case llvm::Triple::NetBSD:
    case llvm::Triple::OpenBSD:
    case llvm::Triple::NaCl:
    case llvm::Triple::PS4:
    case llvm::Triple::ELFIAMCU:
      break;
    case llvm::Triple::Win32:
      if (triple.getEnvironment() != llvm::Triple::Cygnus)
        break;
      LLVM_FALLTHROUGH;
    default:
      // FIXME: temporary hack: hard-coded paths.
      AddPath("/usr/local/include", System, false);
      break;
    }
  }

  // Builtin includes use #include_next directives and should be positioned
  // just prior C include dirs.
  if (HSOpts.UseBuiltinIncludes) {
    // Ignore the sys root, we *always* look for clang headers relative to
    // supplied path.
    SmallString<128> P = StringRef(HSOpts.ResourceDir);
    llvm::sys::path::append(P, "include");
    AddUnmappedPath(P, ExternCSystem, false);
  }

  // All remaining additions are for system include directories, early exit if
  // we aren't using them.
  if (!HSOpts.UseStandardSystemIncludes)
    return;

  // Add dirs specified via 'configure --with-c-include-dirs'.
  StringRef CIncludeDirs(C_INCLUDE_DIRS);
  if (CIncludeDirs != "") {
    SmallVector<StringRef, 5> dirs;
    CIncludeDirs.split(dirs, ":");
    for (StringRef dir : dirs)
      AddPath(dir, ExternCSystem, false);
    return;
  }

  switch (os) {
  case llvm::Triple::Linux:
  case llvm::Triple::Solaris:
    llvm_unreachable("Include management is handled in the driver.");

  case llvm::Triple::CloudABI: {
    // <sysroot>/<triple>/include
    SmallString<128> P = StringRef(HSOpts.ResourceDir);
    llvm::sys::path::append(P, "../../..", triple.str(), "include");
    AddPath(P, System, false);
    break;
  }

  case llvm::Triple::Haiku:
    AddPath("/boot/system/non-packaged/develop/headers", System, false);
    AddPath("/boot/system/develop/headers/os", System, false);
    AddPath("/boot/system/develop/headers/os/app", System, false);
    AddPath("/boot/system/develop/headers/os/arch", System, false);
    AddPath("/boot/system/develop/headers/os/device", System, false);
    AddPath("/boot/system/develop/headers/os/drivers", System, false);
    AddPath("/boot/system/develop/headers/os/game", System, false);
    AddPath("/boot/system/develop/headers/os/interface", System, false);
    AddPath("/boot/system/develop/headers/os/kernel", System, false);
    AddPath("/boot/system/develop/headers/os/locale", System, false);
    AddPath("/boot/system/develop/headers/os/mail", System, false);
    AddPath("/boot/system/develop/headers/os/media", System, false);
    AddPath("/boot/system/develop/headers/os/midi", System, false);
    AddPath("/boot/system/develop/headers/os/midi2", System, false);
    AddPath("/boot/system/develop/headers/os/net", System, false);
    AddPath("/boot/system/develop/headers/os/opengl", System, false);
    AddPath("/boot/system/develop/headers/os/storage", System, false);
    AddPath("/boot/system/develop/headers/os/support", System, false);
    AddPath("/boot/system/develop/headers/os/translation", System, false);
    AddPath("/boot/system/develop/headers/os/add-ons/graphics", System, false);
    AddPath("/boot/system/develop/headers/os/add-ons/input_server", System, false);
    AddPath("/boot/system/develop/headers/os/add-ons/mail_daemon", System, false);
    AddPath("/boot/system/develop/headers/os/add-ons/registrar", System, false);
    AddPath("/boot/system/develop/headers/os/add-ons/screen_saver", System, false);
    AddPath("/boot/system/develop/headers/os/add-ons/tracker", System, false);
    AddPath("/boot/system/develop/headers/os/be_apps/Deskbar", System, false);
    AddPath("/boot/system/develop/headers/os/be_apps/NetPositive", System, false);
    AddPath("/boot/system/develop/headers/os/be_apps/Tracker", System, false);
    AddPath("/boot/system/develop/headers/3rdparty", System, false);
    AddPath("/boot/system/develop/headers/bsd", System, false);
    AddPath("/boot/system/develop/headers/glibc", System, false);
    AddPath("/boot/system/develop/headers/posix", System, false);
    AddPath("/boot/system/develop/headers",  System, false);
    break;
  case llvm::Triple::RTEMS:
    break;
//.........这里部分代码省略.........

std::pair<bool, bool> LangOptions::setTarget(llvm::Triple triple) {
  clearAllPlatformConditionValues();

  if (triple.getOS() == llvm::Triple::Darwin &&
      triple.getVendor() == llvm::Triple::Apple) {
    // Rewrite darwinX.Y triples to macosx10.X'.Y ones.
    // It affects code generation on our platform.
    llvm::SmallString<16> osxBuf;
    llvm::raw_svector_ostream osx(osxBuf);
    osx << llvm::Triple::getOSTypeName(llvm::Triple::MacOSX);

    unsigned major, minor, micro;
    triple.getMacOSXVersion(major, minor, micro);
    osx << major << "." << minor;
    if (micro != 0)
      osx << "." << micro;

    triple.setOSName(osx.str());
  }
  Target = std::move(triple);

  bool UnsupportedOS = false;

  // Set the "os" platform condition.
  if (Target.isMacOSX())
    addPlatformConditionValue(PlatformConditionKind::OS, "OSX");
  else if (triple.isTvOS())
    addPlatformConditionValue(PlatformConditionKind::OS, "tvOS");
  else if (triple.isWatchOS())
    addPlatformConditionValue(PlatformConditionKind::OS, "watchOS");
  else if (triple.isiOS())
    addPlatformConditionValue(PlatformConditionKind::OS, "iOS");
  else if (triple.isAndroid())
    addPlatformConditionValue(PlatformConditionKind::OS, "Android");
  else if (triple.isOSLinux())
    addPlatformConditionValue(PlatformConditionKind::OS, "Linux");
  else if (triple.isOSFreeBSD())
    addPlatformConditionValue(PlatformConditionKind::OS, "FreeBSD");
  else if (triple.isOSWindows())
    addPlatformConditionValue(PlatformConditionKind::OS, "Windows");
  else if (triple.isWindowsCygwinEnvironment())
    addPlatformConditionValue(PlatformConditionKind::OS, "Cygwin");
  else if (triple.isPS4())
    addPlatformConditionValue(PlatformConditionKind::OS, "PS4");
  else
    UnsupportedOS = true;

  bool UnsupportedArch = false;

  // Set the "arch" platform condition.
  switch (Target.getArch()) {
  case llvm::Triple::ArchType::arm:
  case llvm::Triple::ArchType::thumb:
    addPlatformConditionValue(PlatformConditionKind::Arch, "arm");
    break;
  case llvm::Triple::ArchType::aarch64:
    addPlatformConditionValue(PlatformConditionKind::Arch, "arm64");
    break;
  case llvm::Triple::ArchType::ppc64:
    addPlatformConditionValue(PlatformConditionKind::Arch, "powerpc64");
    break;
  case llvm::Triple::ArchType::ppc64le:
    addPlatformConditionValue(PlatformConditionKind::Arch, "powerpc64le");
    break;
  case llvm::Triple::ArchType::x86:
    addPlatformConditionValue(PlatformConditionKind::Arch, "i386");
    break;
  case llvm::Triple::ArchType::x86_64:
    addPlatformConditionValue(PlatformConditionKind::Arch, "x86_64");
    break;
  case llvm::Triple::ArchType::systemz:
    addPlatformConditionValue(PlatformConditionKind::Arch, "s390x");
    break;
  default:
    UnsupportedArch = true;
  }

  if (UnsupportedOS || UnsupportedArch)
    return { UnsupportedOS, UnsupportedArch };

  // Set the "_endian" platform condition.
  switch (Target.getArch()) {
  case llvm::Triple::ArchType::arm:
  case llvm::Triple::ArchType::thumb:
    addPlatformConditionValue(PlatformConditionKind::Endianness, "little");
    break;
  case llvm::Triple::ArchType::aarch64:
    addPlatformConditionValue(PlatformConditionKind::Endianness, "little");
    break;
  case llvm::Triple::ArchType::ppc64:
    addPlatformConditionValue(PlatformConditionKind::Endianness, "big");
    break;
  case llvm::Triple::ArchType::ppc64le:
    addPlatformConditionValue(PlatformConditionKind::Endianness, "little");
    break;
  case llvm::Triple::ArchType::x86:
    addPlatformConditionValue(PlatformConditionKind::Endianness, "little");
    break;
  case llvm::Triple::ArchType::x86_64:
    addPlatformConditionValue(PlatformConditionKind::Endianness, "little");
//.........这里部分代码省略.........

void InitHeaderSearch::
AddDefaultCPlusPlusIncludePaths(const llvm::Triple &triple, const HeaderSearchOptions &HSOpts) {
  llvm::Triple::OSType os = triple.getOS();
  // FIXME: temporary hack: hard-coded paths.

  if (triple.isOSDarwin()) {
    switch (triple.getArch()) {
    default: break;

    case llvm::Triple::ppc:
    case llvm::Triple::ppc64:
      AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
                                  "powerpc-apple-darwin10", "", "ppc64",
                                  triple);
      AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.0.0",
                                  "powerpc-apple-darwin10", "", "ppc64",
                                  triple);
      break;

    case llvm::Triple::x86:
    case llvm::Triple::x86_64:
      AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
                                  "i686-apple-darwin10", "", "x86_64", triple);
      AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.0.0",
                                  "i686-apple-darwin8", "", "", triple);
      break;

    case llvm::Triple::arm:
    case llvm::Triple::thumb:
      AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
                                  "arm-apple-darwin10", "v7", "", triple);
      AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
                                  "arm-apple-darwin10", "v6", "", triple);
      break;
    }
    return;
  }

  switch (os) {
  case llvm::Triple::Linux:
  case llvm::Triple::Win32:
    llvm_unreachable("Include management is handled in the driver.");

  case llvm::Triple::Cygwin:
    // Cygwin-1.7
    AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.5.3");
    AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.3.4");
    // g++-4 / Cygwin-1.5
    AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.3.2");
    break;
  case llvm::Triple::MinGW32:
    // mingw-w64 C++ include paths (i686-w64-mingw32 and x86_64-w64-mingw32)
    AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.5.0");
    AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.5.1");
    AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.5.2");
    AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.5.3");
    AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.5.4");
    AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.6.0");
    AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.6.1");
    AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.6.2");
    AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.6.3");
    AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.7.0");
    // mingw.org C++ include paths
    AddMinGWCPlusPlusIncludePaths("/mingw/lib/gcc", "mingw32", "4.5.2"); //MSYS
#if defined(_WIN32)
    AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.6.2");
    AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.6.1");
    AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.5.2");
    AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.5.0");
    AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.4.0");
    AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.3.0");
#endif
    break;
  case llvm::Triple::DragonFly:
    if (llvm::sys::fs::exists("/usr/lib/gcc47"))
      AddPath("/usr/include/c++/4.7", CXXSystem, false);
    else
      AddPath("/usr/include/c++/4.4", CXXSystem, false);
    break;
  case llvm::Triple::FreeBSD:
    // FreeBSD 8.0
    // FreeBSD 7.3
    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2", "", "", "", triple);
    break;
  case llvm::Triple::OpenBSD: {
    std::string t = triple.getTriple();
    if (t.substr(0, 6) == "x86_64")
      t.replace(0, 6, "amd64");
    AddGnuCPlusPlusIncludePaths("/usr/include/g++",
                                t, "", "", triple);
    break;
  }
  case llvm::Triple::Minix:
    AddGnuCPlusPlusIncludePaths("/usr/gnu/include/c++/4.4.3",
                                "", "", "", triple);
    break;
  case llvm::Triple::Solaris:
    AddGnuCPlusPlusIncludePaths("/usr/gcc/4.5/include/c++/4.5.2/",
                                "i386-pc-solaris2.11", "", "", triple);
    // Solaris - Fall though..
//.........这里部分代码省略.........

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.........

bool swift::irgen::useDllStorage(const llvm::Triple &triple) {
  return triple.isOSBinFormatCOFF() && !triple.isOSCygMing();
}

UniversalLinkageInfo::UniversalLinkageInfo(const llvm::Triple &triple,
                                           bool hasMultipleIGMs,
                                           bool isWholeModule)
    : IsELFObject(triple.isOSBinFormatELF()),
      UseDLLStorage(useDllStorage(triple)), HasMultipleIGMs(hasMultipleIGMs),
      IsWholeModule(isWholeModule) {}

// Get CPU and ABI names. They are not independent
// so we have to calculate them together.
void mips::getMipsCPUAndABI(const ArgList &Args, const llvm::Triple &Triple,
                            StringRef &CPUName, StringRef &ABIName) {
  const char *DefMips32CPU = "mips32r2";
  const char *DefMips64CPU = "mips64r2";

  // MIPS32r6 is the default for mips(el)?-img-linux-gnu and MIPS64r6 is the
  // default for mips64(el)?-img-linux-gnu.
  if (Triple.getVendor() == llvm::Triple::ImaginationTechnologies &&
      Triple.getEnvironment() == llvm::Triple::GNU) {
    DefMips32CPU = "mips32r6";
    DefMips64CPU = "mips64r6";
  }

  // MIPS64r6 is the default for Android MIPS64 (mips64el-linux-android).
  if (Triple.isAndroid()) {
    DefMips32CPU = "mips32";
    DefMips64CPU = "mips64r6";
  }

  // MIPS3 is the default for mips64*-unknown-openbsd.
  if (Triple.getOS() == llvm::Triple::OpenBSD)
    DefMips64CPU = "mips3";

  if (Arg *A = Args.getLastArg(clang::driver::options::OPT_march_EQ,
                               options::OPT_mcpu_EQ))
    CPUName = A->getValue();

  if (Arg *A = Args.getLastArg(options::OPT_mabi_EQ)) {
    ABIName = A->getValue();
    // Convert a GNU style Mips ABI name to the name
    // accepted by LLVM Mips backend.
    ABIName = llvm::StringSwitch<llvm::StringRef>(ABIName)
                  .Case("32", "o32")
                  .Case("64", "n64")
                  .Default(ABIName);
  }

  // Setup default CPU and ABI names.
  if (CPUName.empty() && ABIName.empty()) {
    switch (Triple.getArch()) {
    default:
      llvm_unreachable("Unexpected triple arch name");
    case llvm::Triple::mips:
    case llvm::Triple::mipsel:
      CPUName = DefMips32CPU;
      break;
    case llvm::Triple::mips64:
    case llvm::Triple::mips64el:
      CPUName = DefMips64CPU;
      break;
    }
  }

  if (ABIName.empty() &&
      (Triple.getVendor() == llvm::Triple::MipsTechnologies ||
       Triple.getVendor() == llvm::Triple::ImaginationTechnologies)) {
    ABIName = llvm::StringSwitch<const char *>(CPUName)
                  .Case("mips1", "o32")
                  .Case("mips2", "o32")
                  .Case("mips3", "n64")
                  .Case("mips4", "n64")
                  .Case("mips5", "n64")
                  .Case("mips32", "o32")
                  .Case("mips32r2", "o32")
                  .Case("mips32r3", "o32")
                  .Case("mips32r5", "o32")
                  .Case("mips32r6", "o32")
                  .Case("mips64", "n64")
                  .Case("mips64r2", "n64")
                  .Case("mips64r3", "n64")
                  .Case("mips64r5", "n64")
                  .Case("mips64r6", "n64")
                  .Case("octeon", "n64")
                  .Case("p5600", "o32")
                  .Default("");
  }

  if (ABIName.empty()) {
    // Deduce ABI name from the target triple.
    if (Triple.getArch() == llvm::Triple::mips ||
        Triple.getArch() == llvm::Triple::mipsel)
      ABIName = "o32";
    else
      ABIName = "n64";
  }

  if (CPUName.empty()) {
    // Deduce CPU name from ABI name.
    CPUName = llvm::StringSwitch<const char *>(ABIName)
                  .Case("o32", DefMips32CPU)
                  .Cases("n32", "n64", DefMips64CPU)
                  .Default("");
  }

  // FIXME: Warn on inconsistent use of -march and -mabi.
}

void getDarwinDefines(MacroBuilder &Builder, const LangOptions &Opts,
                      const llvm::Triple &Triple, StringRef &PlatformName,
                      VersionTuple &PlatformMinVersion) {
  Builder.defineMacro("__APPLE_CC__", "6000");
  Builder.defineMacro("__APPLE__");
  Builder.defineMacro("__STDC_NO_THREADS__");
  Builder.defineMacro("OBJC_NEW_PROPERTIES");
  // AddressSanitizer doesn't play well with source fortification, which is on
  // by default on Darwin.
  if (Opts.Sanitize.has(SanitizerKind::Address))
    Builder.defineMacro("_FORTIFY_SOURCE", "0");

  // Darwin defines __weak, __strong, and __unsafe_unretained even in C mode.
  if (!Opts.ObjC) {
    // __weak is always defined, for use in blocks and with objc pointers.
    Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))");
    Builder.defineMacro("__strong", "");
    Builder.defineMacro("__unsafe_unretained", "");
  }

  if (Opts.Static)
    Builder.defineMacro("__STATIC__");
  else
    Builder.defineMacro("__DYNAMIC__");

  if (Opts.POSIXThreads)
    Builder.defineMacro("_REENTRANT");

  // Get the platform type and version number from the triple.
  unsigned Maj, Min, Rev;
  if (Triple.isMacOSX()) {
    Triple.getMacOSXVersion(Maj, Min, Rev);
    PlatformName = "macos";
  } else {
    Triple.getOSVersion(Maj, Min, Rev);
    PlatformName = llvm::Triple::getOSTypeName(Triple.getOS());
  }

  // If -target arch-pc-win32-macho option specified, we're
  // generating code for Win32 ABI. No need to emit
  // __ENVIRONMENT_XX_OS_VERSION_MIN_REQUIRED__.
  if (PlatformName == "win32") {
    PlatformMinVersion = VersionTuple(Maj, Min, Rev);
    return;
  }

  // Set the appropriate OS version define.
  if (Triple.isiOS()) {
    assert(Maj < 100 && Min < 100 && Rev < 100 && "Invalid version!");
    char Str[7];
    if (Maj < 10) {
      Str[0] = '0' + Maj;
      Str[1] = '0' + (Min / 10);
      Str[2] = '0' + (Min % 10);
      Str[3] = '0' + (Rev / 10);
      Str[4] = '0' + (Rev % 10);
      Str[5] = '\0';
    } else {
      // Handle versions >= 10.
      Str[0] = '0' + (Maj / 10);
      Str[1] = '0' + (Maj % 10);
      Str[2] = '0' + (Min / 10);
      Str[3] = '0' + (Min % 10);
      Str[4] = '0' + (Rev / 10);
      Str[5] = '0' + (Rev % 10);
      Str[6] = '\0';
    }
    if (Triple.isTvOS())
      Builder.defineMacro("__ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__", Str);
    else
      Builder.defineMacro("__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__",
                          Str);

  } else if (Triple.isWatchOS()) {
    assert(Maj < 10 && Min < 100 && Rev < 100 && "Invalid version!");
    char Str[6];
    Str[0] = '0' + Maj;
    Str[1] = '0' + (Min / 10);
    Str[2] = '0' + (Min % 10);
    Str[3] = '0' + (Rev / 10);
    Str[4] = '0' + (Rev % 10);
    Str[5] = '\0';
    Builder.defineMacro("__ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__", Str);
  } else if (Triple.isMacOSX()) {
    // Note that the Driver allows versions which aren't representable in the
    // define (because we only get a single digit for the minor and micro
    // revision numbers). So, we limit them to the maximum representable
    // version.
    assert(Maj < 100 && Min < 100 && Rev < 100 && "Invalid version!");
    char Str[7];
    if (Maj < 10 || (Maj == 10 && Min < 10)) {
      Str[0] = '0' + (Maj / 10);
      Str[1] = '0' + (Maj % 10);
      Str[2] = '0' + std::min(Min, 9U);
      Str[3] = '0' + std::min(Rev, 9U);
      Str[4] = '\0';
    } else {
      // Handle versions > 10.9.
      Str[0] = '0' + (Maj / 10);
      Str[1] = '0' + (Maj % 10);
//.........这里部分代码省略.........

// TargetInfo Constructor.
TargetInfo::TargetInfo(const llvm::Triple &T) : TargetOpts(), Triple(T) {
  // Set defaults.  Defaults are set for a 32-bit RISC platform, like PPC or
  // SPARC.  These should be overridden by concrete targets as needed.
  BigEndian = !T.isLittleEndian();
  TLSSupported = true;
  NoAsmVariants = false;
  HasFloat128 = false;
  PointerWidth = PointerAlign = 32;
  BoolWidth = BoolAlign = 8;
  IntWidth = IntAlign = 32;
  LongWidth = LongAlign = 32;
  LongLongWidth = LongLongAlign = 64;
  SuitableAlign = 64;
  DefaultAlignForAttributeAligned = 128;
  MinGlobalAlign = 0;
  // From the glibc documentation, on GNU systems, malloc guarantees 16-byte
  // alignment on 64-bit systems and 8-byte alignment on 32-bit systems. See
  // https://www.gnu.org/software/libc/manual/html_node/Malloc-Examples.html
  if (T.isGNUEnvironment())
    NewAlign = Triple.isArch64Bit() ? 128 : Triple.isArch32Bit() ? 64 : 0;
  else
    NewAlign = 0; // Infer from basic type alignment.
  HalfWidth = 16;
  HalfAlign = 16;
  FloatWidth = 32;
  FloatAlign = 32;
  DoubleWidth = 64;
  DoubleAlign = 64;
  LongDoubleWidth = 64;
  LongDoubleAlign = 64;
  Float128Align = 128;
  LargeArrayMinWidth = 0;
  LargeArrayAlign = 0;
  MaxAtomicPromoteWidth = MaxAtomicInlineWidth = 0;
  MaxVectorAlign = 0;
  MaxTLSAlign = 0;
  SimdDefaultAlign = 0;
  SizeType = UnsignedLong;
  PtrDiffType = SignedLong;
  IntMaxType = SignedLongLong;
  IntPtrType = SignedLong;
  WCharType = SignedInt;
  WIntType = SignedInt;
  Char16Type = UnsignedShort;
  Char32Type = UnsignedInt;
  Int64Type = SignedLongLong;
  SigAtomicType = SignedInt;
  ProcessIDType = SignedInt;
  UseSignedCharForObjCBool = true;
  UseBitFieldTypeAlignment = true;
  UseZeroLengthBitfieldAlignment = false;
  UseExplicitBitFieldAlignment = true;
  ZeroLengthBitfieldBoundary = 0;
  HalfFormat = &llvm::APFloat::IEEEhalf();
  FloatFormat = &llvm::APFloat::IEEEsingle();
  DoubleFormat = &llvm::APFloat::IEEEdouble();
  LongDoubleFormat = &llvm::APFloat::IEEEdouble();
  Float128Format = &llvm::APFloat::IEEEquad();
  MCountName = "mcount";
  RegParmMax = 0;
  SSERegParmMax = 0;
  HasAlignMac68kSupport = false;
  HasBuiltinMSVaList = false;
  IsRenderScriptTarget = false;

  // Default to no types using fpret.
  RealTypeUsesObjCFPRet = 0;

  // Default to not using fp2ret for __Complex long double
  ComplexLongDoubleUsesFP2Ret = false;

  // Set the C++ ABI based on the triple.
  TheCXXABI.set(Triple.isKnownWindowsMSVCEnvironment()
                    ? TargetCXXABI::Microsoft
                    : TargetCXXABI::GenericItanium);

  // Default to an empty address space map.
  AddrSpaceMap = &DefaultAddrSpaceMap;
  UseAddrSpaceMapMangling = false;

  // Default to an unknown platform name.
  PlatformName = "unknown";
  PlatformMinVersion = VersionTuple();
}

std::unique_ptr<ELFLinkingContext>
elf::createX86LinkingContext(llvm::Triple triple) {
  if (triple.getArch() == llvm::Triple::x86)
    return llvm::make_unique<X86LinkingContext>(triple);
  return nullptr;
}

void InitHeaderSearch::
AddDefaultCPlusPlusIncludePaths(const llvm::Triple &triple, const HeaderSearchOptions &HSOpts) {
  llvm::Triple::OSType os = triple.getOS();
  StringRef CxxIncludeRoot(CXX_INCLUDE_ROOT);
  if (CxxIncludeRoot != "") {
    StringRef CxxIncludeArch(CXX_INCLUDE_ARCH);
    if (CxxIncludeArch == "")
      AddGnuCPlusPlusIncludePaths(CxxIncludeRoot, triple.str().c_str(),
                                  CXX_INCLUDE_32BIT_DIR, CXX_INCLUDE_64BIT_DIR,
                                  triple);
    else
      AddGnuCPlusPlusIncludePaths(CxxIncludeRoot, CXX_INCLUDE_ARCH,
                                  CXX_INCLUDE_32BIT_DIR, CXX_INCLUDE_64BIT_DIR,
                                  triple);
    return;
  }
  // FIXME: temporary hack: hard-coded paths.

  if (triple.isOSDarwin()) {
    switch (triple.getArch()) {
    default: break;

    case llvm::Triple::ppc:
    case llvm::Triple::ppc64:
      AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
                                  "powerpc-apple-darwin10", "", "ppc64",
                                  triple);
      AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.0.0",
                                  "powerpc-apple-darwin10", "", "ppc64",
                                  triple);
      break;

    case llvm::Triple::x86:
    case llvm::Triple::x86_64:
      AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
                                  "i686-apple-darwin10", "", "x86_64", triple);
      AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.0.0",
                                  "i686-apple-darwin8", "", "", triple);
      break;

    case llvm::Triple::arm:
    case llvm::Triple::thumb:
      AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
                                  "arm-apple-darwin10", "v7", "", triple);
      AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
                                  "arm-apple-darwin10", "v6", "", triple);
      break;
    }
    return;
  }

  switch (os) {
  case llvm::Triple::Cygwin:
    // Cygwin-1.7
    AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.3.4");
    // g++-4 / Cygwin-1.5
    AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "4.3.2");
    // FIXME: Do we support g++-3.4.4?
    AddMinGWCPlusPlusIncludePaths("/usr/lib/gcc", "i686-pc-cygwin", "3.4.4");
    break;
  case llvm::Triple::MinGW32:
    // mingw-w64 C++ include paths (i686-w64-mingw32 and x86_64-w64-mingw32)
    AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.5.0");
    AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.5.1");
    AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.5.2");
    AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.5.3");
    AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.6.0");
    AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.6.1");
    AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.6.2");
    AddMinGW64CXXPaths(HSOpts.ResourceDir, "4.7.0");
    // mingw.org C++ include paths
    AddMinGWCPlusPlusIncludePaths("/mingw/lib/gcc", "mingw32", "4.5.2"); //MSYS
    AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.5.0");
    AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.4.0");
    AddMinGWCPlusPlusIncludePaths("c:/MinGW/lib/gcc", "mingw32", "4.3.0");
    break;
  case llvm::Triple::DragonFly:
    AddPath("/usr/include/c++/4.1", CXXSystem, true, false, false);
    break;
  case llvm::Triple::Linux:
    //===------------------------------------------------------------------===//
    // Debian based distros.
    // Note: these distros symlink /usr/include/c++/X.Y.Z -> X.Y
    //===------------------------------------------------------------------===//

    // Ubuntu 11.11 "Oneiric Ocelot" -- gcc-4.6.0
    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.6",
                                "x86_64-linux-gnu", "32", "", triple);
    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.6",
                                "i686-linux-gnu", "", "64", triple);
    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.6",
                                "i486-linux-gnu", "", "64", triple);
    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.6",
                                "arm-linux-gnueabi", "", "", triple);

    // Ubuntu 11.04 "Natty Narwhal" -- gcc-4.5.2
    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.5",
                                "x86_64-linux-gnu", "32", "", triple);
    AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.5",
                                "i686-linux-gnu", "", "64", triple);
//.........这里部分代码省略.........

IRGenModule::IRGenModule(IRGenModuleDispatcher &dispatcher, SourceFile *SF,
                         ASTContext &Context,
                         llvm::LLVMContext &LLVMContext,
                         IRGenOptions &Opts, StringRef ModuleName,
                         const llvm::DataLayout &DataLayout,
                         const llvm::Triple &Triple,
                         llvm::TargetMachine *TargetMachine,
                         SILModule *SILMod,
                         StringRef OutputFilename)
  : Context(Context), Opts(Opts),
    ClangCodeGen(createClangCodeGenerator(Context, LLVMContext, Opts, ModuleName)),
    Module(*ClangCodeGen->GetModule()),
    LLVMContext(Module.getContext()), DataLayout(DataLayout),
    Triple(Triple), TargetMachine(TargetMachine),
    SILMod(SILMod), OutputFilename(OutputFilename), dispatcher(dispatcher),
    TargetInfo(SwiftTargetInfo::get(*this)),
    DebugInfo(0), ModuleHash(nullptr),
    ObjCInterop(Context.LangOpts.EnableObjCInterop),
    Types(*new TypeConverter(*this))
{
  dispatcher.addGenModule(SF, this);

  // If the command line contains an explicit request about whether to add
  // LLVM value names, honor it.  Otherwise, add value names only if the
  // final result is textual LLVM assembly.
  if (Opts.HasValueNamesSetting) {
    EnableValueNames = Opts.ValueNames;
  } else {
    EnableValueNames = (Opts.OutputKind == IRGenOutputKind::LLVMAssembly);
  }
  
  VoidTy = llvm::Type::getVoidTy(getLLVMContext());
  Int1Ty = llvm::Type::getInt1Ty(getLLVMContext());
  Int8Ty = llvm::Type::getInt8Ty(getLLVMContext());
  Int16Ty = llvm::Type::getInt16Ty(getLLVMContext());
  Int32Ty = llvm::Type::getInt32Ty(getLLVMContext());
  Int64Ty = llvm::Type::getInt64Ty(getLLVMContext());
  Int8PtrTy = llvm::Type::getInt8PtrTy(getLLVMContext());
  Int8PtrPtrTy = Int8PtrTy->getPointerTo(0);
  SizeTy = DataLayout.getIntPtrType(getLLVMContext(), /*addrspace*/ 0);

  auto CI = static_cast<ClangImporter*>(&*Context.getClangModuleLoader());
  assert(CI && "no clang module loader");
  auto &clangASTContext = CI->getClangASTContext();

  ObjCBoolTy = Int1Ty;
  if (clangASTContext.getTargetInfo().useSignedCharForObjCBool())
    ObjCBoolTy = Int8Ty;

  RefCountedStructTy =
    llvm::StructType::create(getLLVMContext(), "swift.refcounted");
  RefCountedPtrTy = RefCountedStructTy->getPointerTo(/*addrspace*/ 0);
  RefCountedNull = llvm::ConstantPointerNull::get(RefCountedPtrTy);

  // For now, native weak references are just a pointer.
  WeakReferencePtrTy =
    createStructPointerType(*this, "swift.weak", { RefCountedPtrTy });

  // Native unowned references are just a pointer.
  UnownedReferencePtrTy =
    createStructPointerType(*this, "swift.unowned", { RefCountedPtrTy });

  // A type metadata record is the structure pointed to by the canonical
  // address point of a type metadata.  This is at least one word, and
  // potentially more than that, past the start of the actual global
  // structure.
  TypeMetadataStructTy = createStructType(*this, "swift.type", {
    MetadataKindTy          // MetadataKind Kind;
  });
  TypeMetadataPtrTy = TypeMetadataStructTy->getPointerTo(DefaultAS);

  // A protocol descriptor describes a protocol. It is not type metadata in
  // and of itself, but is referenced in the structure of existential type
  // metadata records.
  ProtocolDescriptorStructTy = createStructType(*this, "swift.protocol", {
    Int8PtrTy,              // objc isa
    Int8PtrTy,              // name
    Int8PtrTy,              // inherited protocols
    Int8PtrTy,              // required objc instance methods
    Int8PtrTy,              // required objc class methods
    Int8PtrTy,              // optional objc instance methods
    Int8PtrTy,              // optional objc class methods
    Int8PtrTy,              // objc properties
    Int32Ty,                // size
    Int32Ty,                // flags
    Int16Ty,                // minimum witness count
    Int16Ty,                // default witness count
    Int32Ty                 // padding
  });
  
  ProtocolDescriptorPtrTy = ProtocolDescriptorStructTy->getPointerTo();
  
  // A tuple type metadata record has a couple extra fields.
  auto tupleElementTy = createStructType(*this, "swift.tuple_element_type", {
    TypeMetadataPtrTy,      // Metadata *Type;
    SizeTy                  // size_t Offset;
  });
  TupleTypeMetadataPtrTy = createStructPointerType(*this, "swift.tuple_type", {
    TypeMetadataStructTy,   // (base)
    SizeTy,                 // size_t NumElements;
//.........这里部分代码省略.........