C++ Triple::isOSLinux方法代码示例

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");
}

//.........这里部分代码省略.........
    TLI.setUnavailable(LibFunc::flockfile);
    TLI.setUnavailable(LibFunc::fseeko);
    TLI.setUnavailable(LibFunc::fstat);
    TLI.setUnavailable(LibFunc::fstatvfs);
    TLI.setUnavailable(LibFunc::ftello);
    TLI.setUnavailable(LibFunc::ftrylockfile);
    TLI.setUnavailable(LibFunc::funlockfile);
    TLI.setUnavailable(LibFunc::getc_unlocked);
    TLI.setUnavailable(LibFunc::getitimer);
    TLI.setUnavailable(LibFunc::getlogin_r);
    TLI.setUnavailable(LibFunc::getpwnam);
    TLI.setUnavailable(LibFunc::gettimeofday);
    TLI.setUnavailable(LibFunc::htonl);
    TLI.setUnavailable(LibFunc::htons);
    TLI.setUnavailable(LibFunc::lchown);
    TLI.setUnavailable(LibFunc::lstat);
    TLI.setUnavailable(LibFunc::memccpy);
    TLI.setUnavailable(LibFunc::mkdir);
    TLI.setUnavailable(LibFunc::ntohl);
    TLI.setUnavailable(LibFunc::ntohs);
    TLI.setUnavailable(LibFunc::open);
    TLI.setUnavailable(LibFunc::opendir);
    TLI.setUnavailable(LibFunc::pclose);
    TLI.setUnavailable(LibFunc::popen);
    TLI.setUnavailable(LibFunc::pread);
    TLI.setUnavailable(LibFunc::pwrite);
    TLI.setUnavailable(LibFunc::read);
    TLI.setUnavailable(LibFunc::readlink);
    TLI.setUnavailable(LibFunc::realpath);
    TLI.setUnavailable(LibFunc::rmdir);
    TLI.setUnavailable(LibFunc::setitimer);
    TLI.setUnavailable(LibFunc::stat);
    TLI.setUnavailable(LibFunc::statvfs);
    TLI.setUnavailable(LibFunc::stpcpy);
    TLI.setUnavailable(LibFunc::stpncpy);
    TLI.setUnavailable(LibFunc::strcasecmp);
    TLI.setUnavailable(LibFunc::strncasecmp);
    TLI.setUnavailable(LibFunc::times);
    TLI.setUnavailable(LibFunc::uname);
    TLI.setUnavailable(LibFunc::unlink);
    TLI.setUnavailable(LibFunc::unsetenv);
    TLI.setUnavailable(LibFunc::utime);
    TLI.setUnavailable(LibFunc::utimes);
    TLI.setUnavailable(LibFunc::write);

    // Win32 does *not* provide provide these functions, but they are
    // specified by C99:
    TLI.setUnavailable(LibFunc::atoll);
    TLI.setUnavailable(LibFunc::frexpf);
    TLI.setUnavailable(LibFunc::llabs);
  }

  // ffsl is available on at least Darwin, Mac OS X, iOS, FreeBSD, and
  // Linux (GLIBC):
  // http://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man3/ffsl.3.html
  // http://svn.freebsd.org/base/user/eri/pf45/head/lib/libc/string/ffsl.c
  // http://www.gnu.org/software/gnulib/manual/html_node/ffsl.html
  switch (T.getOS()) {
  case Triple::Darwin:
  case Triple::MacOSX:
  case Triple::IOS:
  case Triple::FreeBSD:
  case Triple::Linux:
    break;
  default:
    TLI.setUnavailable(LibFunc::ffsl);
  }

  // ffsll is available on at least FreeBSD and Linux (GLIBC):
  // http://svn.freebsd.org/base/user/eri/pf45/head/lib/libc/string/ffsll.c
  // http://www.gnu.org/software/gnulib/manual/html_node/ffsll.html
  switch (T.getOS()) {
  case Triple::FreeBSD:
  case Triple::Linux:
    break;
  default:
    TLI.setUnavailable(LibFunc::ffsll);
  }

  // The following functions are available on at least Linux:
  if (!T.isOSLinux()) {
    TLI.setUnavailable(LibFunc::dunder_strdup);
    TLI.setUnavailable(LibFunc::dunder_strtok_r);
    TLI.setUnavailable(LibFunc::dunder_isoc99_scanf);
    TLI.setUnavailable(LibFunc::dunder_isoc99_sscanf);
    TLI.setUnavailable(LibFunc::under_IO_getc);
    TLI.setUnavailable(LibFunc::under_IO_putc);
    TLI.setUnavailable(LibFunc::memalign);
    TLI.setUnavailable(LibFunc::fopen64);
    TLI.setUnavailable(LibFunc::fseeko64);
    TLI.setUnavailable(LibFunc::fstat64);
    TLI.setUnavailable(LibFunc::fstatvfs64);
    TLI.setUnavailable(LibFunc::ftello64);
    TLI.setUnavailable(LibFunc::lstat64);
    TLI.setUnavailable(LibFunc::open64);
    TLI.setUnavailable(LibFunc::stat64);
    TLI.setUnavailable(LibFunc::statvfs64);
    TLI.setUnavailable(LibFunc::tmpfile64);
  }
}

//.........这里部分代码省略.........
    }
    break;
  case Triple::Linux:
    // exp10, exp10f, exp10l is available on Linux (GLIBC) but are extremely
    // buggy prior to glibc version 2.18. Until this version is widely deployed
    // or we have a reasonable detection strategy, we cannot use exp10 reliably
    // on Linux.
    //
    // Fall through to disable all of them.
  default:
    TLI.setUnavailable(LibFunc::exp10);
    TLI.setUnavailable(LibFunc::exp10f);
    TLI.setUnavailable(LibFunc::exp10l);
  }

  // ffsl is available on at least Darwin, Mac OS X, iOS, FreeBSD, and
  // Linux (GLIBC):
  // http://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man3/ffsl.3.html
  // http://svn.freebsd.org/base/head/lib/libc/string/ffsl.c
  // http://www.gnu.org/software/gnulib/manual/html_node/ffsl.html
  switch (T.getOS()) {
  case Triple::Darwin:
  case Triple::MacOSX:
  case Triple::IOS:
  case Triple::TvOS:
  case Triple::WatchOS:
  case Triple::FreeBSD:
  case Triple::Linux:
    break;
  default:
    TLI.setUnavailable(LibFunc::ffsl);
  }

  // ffsll is available on at least FreeBSD and Linux (GLIBC):
  // http://svn.freebsd.org/base/head/lib/libc/string/ffsll.c
  // http://www.gnu.org/software/gnulib/manual/html_node/ffsll.html
  switch (T.getOS()) {
  case Triple::Darwin:
  case Triple::MacOSX:
  case Triple::IOS:
  case Triple::TvOS:
  case Triple::WatchOS:
  case Triple::FreeBSD:
  case Triple::Linux:
    break;
  default:
    TLI.setUnavailable(LibFunc::ffsll);
  }

  // The following functions are available on at least FreeBSD:
  // http://svn.freebsd.org/base/head/lib/libc/string/fls.c
  // http://svn.freebsd.org/base/head/lib/libc/string/flsl.c
  // http://svn.freebsd.org/base/head/lib/libc/string/flsll.c
  if (!T.isOSFreeBSD()) {
    TLI.setUnavailable(LibFunc::fls);
    TLI.setUnavailable(LibFunc::flsl);
    TLI.setUnavailable(LibFunc::flsll);
  }

  // The following functions are available on at least Linux:
  if (!T.isOSLinux()) {
    TLI.setUnavailable(LibFunc::dunder_strdup);
    TLI.setUnavailable(LibFunc::dunder_strtok_r);
    TLI.setUnavailable(LibFunc::dunder_isoc99_scanf);
    TLI.setUnavailable(LibFunc::dunder_isoc99_sscanf);
    TLI.setUnavailable(LibFunc::under_IO_getc);
    TLI.setUnavailable(LibFunc::under_IO_putc);
    TLI.setUnavailable(LibFunc::memalign);
    TLI.setUnavailable(LibFunc::fopen64);
    TLI.setUnavailable(LibFunc::fseeko64);
    TLI.setUnavailable(LibFunc::fstat64);
    TLI.setUnavailable(LibFunc::fstatvfs64);
    TLI.setUnavailable(LibFunc::ftello64);
    TLI.setUnavailable(LibFunc::lstat64);
    TLI.setUnavailable(LibFunc::open64);
    TLI.setUnavailable(LibFunc::stat64);
    TLI.setUnavailable(LibFunc::statvfs64);
    TLI.setUnavailable(LibFunc::tmpfile64);
  }

  // As currently implemented in clang, NVPTX code has no standard library to
  // speak of.  Headers provide a standard-ish library implementation, but many
  // of the signatures are wrong -- for example, many libm functions are not
  // extern "C".
  //
  // libdevice, an IR library provided by nvidia, is linked in by the front-end,
  // but only used functions are provided to llvm.  Moreover, most of the
  // functions in libdevice don't map precisely to standard library functions.
  //
  // FIXME: Having no standard library prevents e.g. many fastmath
  // optimizations, so this situation should be fixed.
  if (T.isNVPTX()) {
    TLI.disableAllFunctions();
    TLI.setAvailable(LibFunc::nvvm_reflect);
  } else {
    TLI.setUnavailable(LibFunc::nvvm_reflect);
  }

  TLI.addVectorizableFunctionsFromVecLib(ClVectorLibrary);
}