C++ MacroBuilder::defineMacro方法代码示例

/// \brief Add definitions required for a smooth interaction between
/// Objective-C++ automated reference counting and libstdc++ (4.2).
static void AddObjCXXARCLibstdcxxDefines(const LangOptions &LangOpts, 
                                         MacroBuilder &Builder) {
  Builder.defineMacro("_GLIBCXX_PREDEFINED_OBJC_ARC_IS_SCALAR");
  
  std::string Result;
  {
    // Provide specializations for the __is_scalar type trait so that 
    // lifetime-qualified objects are not considered "scalar" types, which
    // libstdc++ uses as an indicator of the presence of trivial copy, assign,
    // default-construct, and destruct semantics (none of which hold for
    // lifetime-qualified objects in ARC).
    llvm::raw_string_ostream Out(Result);
    
    Out << "namespace std {\n"
        << "\n"
        << "struct __true_type;\n"
        << "struct __false_type;\n"
        << "\n";
    
    Out << "template<typename _Tp> struct __is_scalar;\n"
        << "\n";
      
    Out << "template<typename _Tp>\n"
        << "struct __is_scalar<__attribute__((objc_ownership(strong))) _Tp> {\n"
        << "  enum { __value = 0 };\n"
        << "  typedef __false_type __type;\n"
        << "};\n"
        << "\n";
      
    if (LangOpts.ObjCARCWeak) {
      Out << "template<typename _Tp>\n"
          << "struct __is_scalar<__attribute__((objc_ownership(weak))) _Tp> {\n"
          << "  enum { __value = 0 };\n"
          << "  typedef __false_type __type;\n"
          << "};\n"
          << "\n";
    }
    
    Out << "template<typename _Tp>\n"
        << "struct __is_scalar<__attribute__((objc_ownership(autoreleasing)))"
        << " _Tp> {\n"
        << "  enum { __value = 0 };\n"
        << "  typedef __false_type __type;\n"
        << "};\n"
        << "\n";
      
    Out << "}\n";
  }
  Builder.append(Result);
}

// Append a #define line to Buf for Macro.  Macro should be of the form XXX,
// in which case we emit "#define XXX 1" or "XXX=Y z W" in which case we emit
// "#define XXX Y z W".  To get a #define with no value, use "XXX=".
static void DefineBuiltinMacro(MacroBuilder &Builder, StringRef Macro,
                               DiagnosticsEngine &Diags) {
  std::pair<StringRef, StringRef> MacroPair = Macro.split('=');
  StringRef MacroName = MacroPair.first;
  StringRef MacroBody = MacroPair.second;
  if (MacroName.size() != Macro.size()) {
    // Per GCC -D semantics, the macro ends at \n if it exists.
    StringRef::size_type End = MacroBody.find_first_of("\n\r");
    if (End != StringRef::npos)
      Diags.Report(diag::warn_fe_macro_contains_embedded_newline)
        << MacroName;
    MacroBody = MacroBody.substr(0, End);
    // We handle macro bodies which end in a backslash by appending an extra
    // backslash+newline.  This makes sure we don't accidentally treat the
    // backslash as a line continuation marker.
    if (MacroBodyEndsInBackslash(MacroBody))
      Builder.defineMacro(MacroName, Twine(MacroBody) + "\\\n");
    else
      Builder.defineMacro(MacroName, MacroBody);
  } else {
    // Push "macroname 1".
    Builder.defineMacro(Macro);
  }
}

static void DefineExactWidthIntType(TargetInfo::IntType Ty, 
                               const TargetInfo &TI, MacroBuilder &Builder) {
  int TypeWidth = TI.getTypeWidth(Ty);

  // Use the target specified int64 type, when appropriate, so that [u]int64_t
  // ends up being defined in terms of the correct type.
  if (TypeWidth == 64)
    Ty = TI.getInt64Type();

  DefineType("__INT" + Twine(TypeWidth) + "_TYPE__", Ty, Builder);

  StringRef ConstSuffix(TargetInfo::getTypeConstantSuffix(Ty));
  if (!ConstSuffix.empty())
    Builder.defineMacro("__INT" + Twine(TypeWidth) + "_C_SUFFIX__",
                        ConstSuffix);
}

void WebAssemblyTargetInfo::getTargetDefines(const LangOptions &Opts,
                                             MacroBuilder &Builder) const {
  defineCPUMacros(Builder, "wasm", /*Tuning=*/false);
  if (SIMDLevel >= SIMD128)
    Builder.defineMacro("__wasm_simd128__");
  if (SIMDLevel >= UnimplementedSIMD128)
    Builder.defineMacro("__wasm_unimplemented_simd128__");
  if (HasNontrappingFPToInt)
    Builder.defineMacro("__wasm_nontrapping_fptoint__");
  if (HasSignExt)
    Builder.defineMacro("__wasm_sign_ext__");
  if (HasExceptionHandling)
    Builder.defineMacro("__wasm_exception_handling__");
  if (HasBulkMemory)
    Builder.defineMacro("__wasm_bulk_memory__");
  if (HasAtomics)
    Builder.defineMacro("__wasm_atomics__");
  if (HasMutableGlobals)
    Builder.defineMacro("__wasm_mutable_globals__");
}

static void DefineExactWidthIntType(TargetInfo::IntType Ty,
                                    const TargetInfo &TI,
                                    MacroBuilder &Builder) {
  int TypeWidth = TI.getTypeWidth(Ty);
  bool IsSigned = TI.isTypeSigned(Ty);

  // Use the target specified int64 type, when appropriate, so that [u]int64_t
  // ends up being defined in terms of the correct type.
  if (TypeWidth == 64)
    Ty = IsSigned ? TI.getInt64Type() : TI.getUInt64Type();

  const char *Prefix = IsSigned ? "__INT" : "__UINT";

  DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder);
  DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder);

  StringRef ConstSuffix(TI.getTypeConstantSuffix(Ty));
  Builder.defineMacro(Prefix + Twine(TypeWidth) + "_C_SUFFIX__", ConstSuffix);
}

void ARMbeTargetInfo::getTargetDefines(const LangOptions &Opts,
                                       MacroBuilder &Builder) const {
  Builder.defineMacro("__ARMEB__");
  Builder.defineMacro("__ARM_BIG_ENDIAN");
  ARMTargetInfo::getTargetDefines(Opts, Builder);
}

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.........

static void InitializeStandardPredefinedMacros(const TargetInfo &TI,
                                               const LangOptions &LangOpts,
                                               const FrontendOptions &FEOpts,
                                               MacroBuilder &Builder) {
  if (!LangOpts.MSVCCompat && !LangOpts.TraditionalCPP)
    Builder.defineMacro("__STDC__");
  if (LangOpts.Freestanding)
    Builder.defineMacro("__STDC_HOSTED__", "0");
  else
    Builder.defineMacro("__STDC_HOSTED__");

  if (!LangOpts.CPlusPlus) {
    if (LangOpts.C11)
      Builder.defineMacro("__STDC_VERSION__", "201112L");
    else if (LangOpts.C99)
      Builder.defineMacro("__STDC_VERSION__", "199901L");
    else if (!LangOpts.GNUMode && LangOpts.Digraphs)
      Builder.defineMacro("__STDC_VERSION__", "199409L");
  } else {
    // FIXME: Use correct value for C++17.
    if (LangOpts.CPlusPlus1z)
      Builder.defineMacro("__cplusplus", "201406L");
    // C++1y [cpp.predefined]p1:
    //   The name __cplusplus is defined to the value 201402L when compiling a
    //   C++ translation unit.
    else if (LangOpts.CPlusPlus14)
      Builder.defineMacro("__cplusplus", "201402L");
    // C++11 [cpp.predefined]p1:
    //   The name __cplusplus is defined to the value 201103L when compiling a
    //   C++ translation unit.
    else if (LangOpts.CPlusPlus11)
      Builder.defineMacro("__cplusplus", "201103L");
    // C++03 [cpp.predefined]p1:
    //   The name __cplusplus is defined to the value 199711L when compiling a
    //   C++ translation unit.
    else
      Builder.defineMacro("__cplusplus", "199711L");
  }

  // In C11 these are environment macros. In C++11 they are only defined
  // as part of <cuchar>. To prevent breakage when mixing C and C++
  // code, define these macros unconditionally. We can define them
  // unconditionally, as Clang always uses UTF-16 and UTF-32 for 16-bit
  // and 32-bit character literals.
  Builder.defineMacro("__STDC_UTF_16__", "1");
  Builder.defineMacro("__STDC_UTF_32__", "1");

  if (LangOpts.ObjC1)
    Builder.defineMacro("__OBJC__");

  // OpenCL v1.0/1.1 s6.9, v1.2/2.0 s6.10: Preprocessor Directives and Macros.
  if (LangOpts.OpenCL) {
    // OpenCL v1.0 and v1.1 do not have a predefined macro to indicate the
    // language standard with which the program is compiled. __OPENCL_VERSION__
    // is for the OpenCL version supported by the OpenCL device, which is not
    // necessarily the language standard with which the program is compiled.
    // A shared OpenCL header file requires a macro to indicate the language
    // standard. As a workaround, __OPENCL_C_VERSION__ is defined for
    // OpenCL v1.0 and v1.1.
    switch (LangOpts.OpenCLVersion) {
    case 100:
      Builder.defineMacro("__OPENCL_C_VERSION__", "100");
      break;
    case 110:
      Builder.defineMacro("__OPENCL_C_VERSION__", "110");
      break;
    case 120:
      Builder.defineMacro("__OPENCL_C_VERSION__", "120");
      break;
    case 200:
      Builder.defineMacro("__OPENCL_C_VERSION__", "200");
      break;
    default:
      llvm_unreachable("Unsupported OpenCL version");
    }
    Builder.defineMacro("CL_VERSION_1_0", "100");
    Builder.defineMacro("CL_VERSION_1_1", "110");
    Builder.defineMacro("CL_VERSION_1_2", "120");
    Builder.defineMacro("CL_VERSION_2_0", "200");

    if (LangOpts.FastRelaxedMath)
      Builder.defineMacro("__FAST_RELAXED_MATH__");
  }
  // Not "standard" per se, but available even with the -undef flag.
  if (LangOpts.AsmPreprocessor)
    Builder.defineMacro("__ASSEMBLER__");
  if (LangOpts.CUDA)
    Builder.defineMacro("__CUDA__");
}

static void DefineTypeSizeof(StringRef MacroName, unsigned BitWidth,
                             const TargetInfo &TI, MacroBuilder &Builder) {
  Builder.defineMacro(MacroName,
                      Twine(BitWidth / TI.getCharWidth()));
}

static void DefineType(const Twine &MacroName, TargetInfo::IntType Ty,
                       MacroBuilder &Builder) {
  Builder.defineMacro(MacroName, TargetInfo::getTypeName(Ty));
}

void MipsTargetInfo::getTargetDefines(const LangOptions &Opts,
                                      MacroBuilder &Builder) const {
  if (BigEndian) {
    DefineStd(Builder, "MIPSEB", Opts);
    Builder.defineMacro("_MIPSEB");
  } else {
    DefineStd(Builder, "MIPSEL", Opts);
    Builder.defineMacro("_MIPSEL");
  }

  Builder.defineMacro("__mips__");
  Builder.defineMacro("_mips");
  if (Opts.GNUMode)
    Builder.defineMacro("mips");

  if (ABI == "o32") {
    Builder.defineMacro("__mips", "32");
    Builder.defineMacro("_MIPS_ISA", "_MIPS_ISA_MIPS32");
  } else {
    Builder.defineMacro("__mips", "64");
    Builder.defineMacro("__mips64");
    Builder.defineMacro("__mips64__");
    Builder.defineMacro("_MIPS_ISA", "_MIPS_ISA_MIPS64");
  }

  const std::string ISARev = llvm::StringSwitch<std::string>(getCPU())
                                 .Cases("mips32", "mips64", "1")
                                 .Cases("mips32r2", "mips64r2", "2")
                                 .Cases("mips32r3", "mips64r3", "3")
                                 .Cases("mips32r5", "mips64r5", "5")
                                 .Cases("mips32r6", "mips64r6", "6")
                                 .Default("");
  if (!ISARev.empty())
    Builder.defineMacro("__mips_isa_rev", ISARev);

  if (ABI == "o32") {
    Builder.defineMacro("__mips_o32");
    Builder.defineMacro("_ABIO32", "1");
    Builder.defineMacro("_MIPS_SIM", "_ABIO32");
  } else if (ABI == "n32") {
    Builder.defineMacro("__mips_n32");
    Builder.defineMacro("_ABIN32", "2");
    Builder.defineMacro("_MIPS_SIM", "_ABIN32");
  } else if (ABI == "n64") {
    Builder.defineMacro("__mips_n64");
    Builder.defineMacro("_ABI64", "3");
    Builder.defineMacro("_MIPS_SIM", "_ABI64");
  } else
    llvm_unreachable("Invalid ABI.");

  if (!IsNoABICalls) {
    Builder.defineMacro("__mips_abicalls");
    if (CanUseBSDABICalls)
      Builder.defineMacro("__ABICALLS__");
  }

  Builder.defineMacro("__REGISTER_PREFIX__", "");

  switch (FloatABI) {
  case HardFloat:
    Builder.defineMacro("__mips_hard_float", Twine(1));
    break;
  case SoftFloat:
    Builder.defineMacro("__mips_soft_float", Twine(1));
    break;
  }

  if (IsSingleFloat)
    Builder.defineMacro("__mips_single_float", Twine(1));

  Builder.defineMacro("__mips_fpr", HasFP64 ? Twine(64) : Twine(32));
  Builder.defineMacro("_MIPS_FPSET",
                      Twine(32 / (HasFP64 || IsSingleFloat ? 1 : 2)));

  if (IsMips16)
    Builder.defineMacro("__mips16", Twine(1));

  if (IsMicromips)
    Builder.defineMacro("__mips_micromips", Twine(1));

  if (IsNan2008)
    Builder.defineMacro("__mips_nan2008", Twine(1));

  if (IsAbs2008)
    Builder.defineMacro("__mips_abs2008", Twine(1));

  switch (DspRev) {
  default:
    break;
  case DSP1:
    Builder.defineMacro("__mips_dsp_rev", Twine(1));
    Builder.defineMacro("__mips_dsp", Twine(1));
    break;
  case DSP2:
    Builder.defineMacro("__mips_dsp_rev", Twine(2));
    Builder.defineMacro("__mips_dspr2", Twine(1));
    Builder.defineMacro("__mips_dsp", Twine(1));
    break;
  }

//.........这里部分代码省略.........

/// Initialize the predefined C++ language feature test macros defined in
/// ISO/IEC JTC1/SC22/WG21 (C++) SD-6: "SG10 Feature Test Recommendations".
static void InitializeCPlusPlusFeatureTestMacros(const LangOptions &LangOpts,
                                                 MacroBuilder &Builder) {
  // C++11 features.
  if (LangOpts.CPlusPlus11) {
    Builder.defineMacro("__cpp_unicode_characters", "200704");
    Builder.defineMacro("__cpp_raw_strings", "200710");
    Builder.defineMacro("__cpp_unicode_literals", "200710");
    Builder.defineMacro("__cpp_user_defined_literals", "200809");
    Builder.defineMacro("__cpp_lambdas", "200907");
    Builder.defineMacro("__cpp_constexpr",
                        LangOpts.CPlusPlus1y ? "201304" : "200704");
    Builder.defineMacro("__cpp_static_assert", "200410");
    Builder.defineMacro("__cpp_decltype", "200707");
    Builder.defineMacro("__cpp_attributes", "200809");
    Builder.defineMacro("__cpp_rvalue_references", "200610");
    Builder.defineMacro("__cpp_variadic_templates", "200704");
  }

  // C++14 features.
  if (LangOpts.CPlusPlus1y) {
    Builder.defineMacro("__cpp_binary_literals", "201304");
    Builder.defineMacro("__cpp_init_captures", "201304");
    Builder.defineMacro("__cpp_generic_lambdas", "201304");
    Builder.defineMacro("__cpp_decltype_auto", "201304");
    Builder.defineMacro("__cpp_return_type_deduction", "201304");
    Builder.defineMacro("__cpp_aggregate_nsdmi", "201304");
    Builder.defineMacro("__cpp_variable_templates", "201304");
  }
}

static void InitializeStandardPredefinedMacros(const TargetInfo &TI,
                                               const LangOptions &LangOpts,
                                               const FrontendOptions &FEOpts,
                                               MacroBuilder &Builder) {
  if (!LangOpts.MSVCCompat && !LangOpts.TraditionalCPP)
    Builder.defineMacro("__STDC__");
  if (LangOpts.Freestanding)
    Builder.defineMacro("__STDC_HOSTED__", "0");
  else
    Builder.defineMacro("__STDC_HOSTED__");

  if (!LangOpts.CPlusPlus) {
    if (LangOpts.C11)
      Builder.defineMacro("__STDC_VERSION__", "201112L");
    else if (LangOpts.C99)
      Builder.defineMacro("__STDC_VERSION__", "199901L");
    else if (!LangOpts.GNUMode && LangOpts.Digraphs)
      Builder.defineMacro("__STDC_VERSION__", "199409L");
  } else {
    // FIXME: Use correct value for C++17.
    if (LangOpts.CPlusPlus1z)
      Builder.defineMacro("__cplusplus", "201406L");
    // C++1y [cpp.predefined]p1:
    //   The name __cplusplus is defined to the value 201402L when compiling a
    //   C++ translation unit.
    else if (LangOpts.CPlusPlus1y)
      Builder.defineMacro("__cplusplus", "201402L");
    // C++11 [cpp.predefined]p1:
    //   The name __cplusplus is defined to the value 201103L when compiling a
    //   C++ translation unit.
    else if (LangOpts.CPlusPlus11)
      Builder.defineMacro("__cplusplus", "201103L");
    // C++03 [cpp.predefined]p1:
    //   The name __cplusplus is defined to the value 199711L when compiling a
    //   C++ translation unit.
    else
      Builder.defineMacro("__cplusplus", "199711L");
  }

  // In C11 these are environment macros. In C++11 they are only defined
  // as part of <cuchar>. To prevent breakage when mixing C and C++
  // code, define these macros unconditionally. We can define them
  // unconditionally, as Clang always uses UTF-16 and UTF-32 for 16-bit
  // and 32-bit character literals.
  Builder.defineMacro("__STDC_UTF_16__", "1");
  Builder.defineMacro("__STDC_UTF_32__", "1");

  if (LangOpts.ObjC1)
    Builder.defineMacro("__OBJC__");

  // Not "standard" per se, but available even with the -undef flag.
  if (LangOpts.AsmPreprocessor)
    Builder.defineMacro("__ASSEMBLER__");
}

static void InitializePredefinedMacros(const TargetInfo &TI,
                                       const LangOptions &LangOpts,
                                       const FrontendOptions &FEOpts,
                                       MacroBuilder &Builder) {
  // Compiler version introspection macros.
  Builder.defineMacro("__llvm__");  // LLVM Backend
  Builder.defineMacro("__clang__"); // Clang Frontend
#define TOSTR2(X) #X
#define TOSTR(X) TOSTR2(X)
  Builder.defineMacro("__clang_major__", TOSTR(CLANG_VERSION_MAJOR));
  Builder.defineMacro("__clang_minor__", TOSTR(CLANG_VERSION_MINOR));
#ifdef CLANG_VERSION_PATCHLEVEL
  Builder.defineMacro("__clang_patchlevel__", TOSTR(CLANG_VERSION_PATCHLEVEL));
#else
  Builder.defineMacro("__clang_patchlevel__", "0");
#endif
  Builder.defineMacro("__clang_version__", 
                      "\"" CLANG_VERSION_STRING " ("
                      + getClangFullRepositoryVersion() + ")\"");
#undef TOSTR
#undef TOSTR2
  // Currently claim to be compatible with GCC 4.2.1-5621.
  Builder.defineMacro("__GNUC_MINOR__", "2");
  Builder.defineMacro("__GNUC_PATCHLEVEL__", "1");
  Builder.defineMacro("__GNUC__", "4");
  Builder.defineMacro("__GXX_ABI_VERSION", "1002");

  // As sad as it is, enough software depends on the __VERSION__ for version
  // checks that it is necessary to report 4.2.1 (the base GCC version we claim
  // compatibility with) first.
  Builder.defineMacro("__VERSION__", "\"4.2.1 Compatible " + 
                      Twine(getClangFullCPPVersion()) + "\"");

  // Initialize language-specific preprocessor defines.

  // Standard conforming mode?
  if (!LangOpts.GNUMode)
    Builder.defineMacro("__STRICT_ANSI__");

  if (LangOpts.CPlusPlus0x)
    Builder.defineMacro("__GXX_EXPERIMENTAL_CXX0X__");

  if (LangOpts.ObjC1) {
    if (LangOpts.ObjCNonFragileABI) {
      Builder.defineMacro("__OBJC2__");
      
      if (LangOpts.ObjCExceptions)
        Builder.defineMacro("OBJC_ZEROCOST_EXCEPTIONS");
    }

    if (LangOpts.getGC() != LangOptions::NonGC)
      Builder.defineMacro("__OBJC_GC__");

    if (LangOpts.NeXTRuntime)
      Builder.defineMacro("__NEXT_RUNTIME__");
  }

  // darwin_constant_cfstrings controls this. This is also dependent
  // on other things like the runtime I believe.  This is set even for C code.
  if (!LangOpts.NoConstantCFStrings)
      Builder.defineMacro("__CONSTANT_CFSTRINGS__");

  if (LangOpts.ObjC2)
    Builder.defineMacro("OBJC_NEW_PROPERTIES");

  if (LangOpts.PascalStrings)
    Builder.defineMacro("__PASCAL_STRINGS__");

  if (LangOpts.Blocks) {
    Builder.defineMacro("__block", "__attribute__((__blocks__(byref)))");
    Builder.defineMacro("__BLOCKS__");
  }

  if (LangOpts.CXXExceptions)
    Builder.defineMacro("__EXCEPTIONS");
  if (LangOpts.RTTI)
    Builder.defineMacro("__GXX_RTTI");
  if (LangOpts.SjLjExceptions)
    Builder.defineMacro("__USING_SJLJ_EXCEPTIONS__");

  if (LangOpts.Deprecated)
    Builder.defineMacro("__DEPRECATED");

  if (LangOpts.CPlusPlus) {
    Builder.defineMacro("__GNUG__", "4");
    Builder.defineMacro("__GXX_WEAK__");
    Builder.defineMacro("__private_extern__", "extern");
  }

  if (LangOpts.MicrosoftExt) {
    // Both __PRETTY_FUNCTION__ and __FUNCTION__ are GCC extensions, however
    // VC++ appears to only like __FUNCTION__.
    Builder.defineMacro("__PRETTY_FUNCTION__", "__FUNCTION__");
    // Work around some issues with Visual C++ headerws.
    if (LangOpts.CPlusPlus) {
      // Since we define wchar_t in C++ mode.
      Builder.defineMacro("_WCHAR_T_DEFINED");
      Builder.defineMacro("_NATIVE_WCHAR_T_DEFINED");
      // FIXME: Support Microsoft's __identifier extension in the lexer.
      Builder.append("#define __identifier(x) x");
//.........这里部分代码省略.........

static void InitializePredefinedMacros(const TargetInfo &TI,
                                       const LangOptions &LangOpts,
                                       const FrontendOptions &FEOpts,
                                       MacroBuilder &Builder) {
  // Compiler version introspection macros.
  Builder.defineMacro("__llvm__");  // LLVM Backend
  Builder.defineMacro("__clang__"); // Clang Frontend
#define TOSTR2(X) #X
#define TOSTR(X) TOSTR2(X)
  Builder.defineMacro("__clang_major__", TOSTR(CLANG_VERSION_MAJOR));
  Builder.defineMacro("__clang_minor__", TOSTR(CLANG_VERSION_MINOR));
#ifdef CLANG_VERSION_PATCHLEVEL
  Builder.defineMacro("__clang_patchlevel__", TOSTR(CLANG_VERSION_PATCHLEVEL));
#else
  Builder.defineMacro("__clang_patchlevel__", "0");
#endif
  Builder.defineMacro("__clang_version__", 
                      "\"" CLANG_VERSION_STRING " "
                      + getClangFullRepositoryVersion() + "\"");
#undef TOSTR
#undef TOSTR2
  if (!LangOpts.MicrosoftMode) {
    // Currently claim to be compatible with GCC 4.2.1-5621, but only if we're
    // not compiling for MSVC compatibility
    Builder.defineMacro("__GNUC_MINOR__", "2");
    Builder.defineMacro("__GNUC_PATCHLEVEL__", "1");
    Builder.defineMacro("__GNUC__", "4");
    Builder.defineMacro("__GXX_ABI_VERSION", "1002");
  }

  // Define macros for the C11 / C++11 memory orderings
  Builder.defineMacro("__ATOMIC_RELAXED", "0");
  Builder.defineMacro("__ATOMIC_CONSUME", "1");
  Builder.defineMacro("__ATOMIC_ACQUIRE", "2");
  Builder.defineMacro("__ATOMIC_RELEASE", "3");
  Builder.defineMacro("__ATOMIC_ACQ_REL", "4");
  Builder.defineMacro("__ATOMIC_SEQ_CST", "5");

  // Support for #pragma redefine_extname (Sun compatibility)
  Builder.defineMacro("__PRAGMA_REDEFINE_EXTNAME", "1");

  // As sad as it is, enough software depends on the __VERSION__ for version
  // checks that it is necessary to report 4.2.1 (the base GCC version we claim
  // compatibility with) first.
  Builder.defineMacro("__VERSION__", "\"4.2.1 Compatible " + 
                      Twine(getClangFullCPPVersion()) + "\"");

  // Initialize language-specific preprocessor defines.

  // Standard conforming mode?
  if (!LangOpts.GNUMode)
    Builder.defineMacro("__STRICT_ANSI__");

  if (LangOpts.CPlusPlus11)
    Builder.defineMacro("__GXX_EXPERIMENTAL_CXX0X__");

  if (LangOpts.ObjC1) {
    if (LangOpts.ObjCRuntime.isNonFragile()) {
      Builder.defineMacro("__OBJC2__");
      
      if (LangOpts.ObjCExceptions)
        Builder.defineMacro("OBJC_ZEROCOST_EXCEPTIONS");
    }

    if (LangOpts.getGC() != LangOptions::NonGC)
      Builder.defineMacro("__OBJC_GC__");

    if (LangOpts.ObjCRuntime.isNeXTFamily())
      Builder.defineMacro("__NEXT_RUNTIME__");

    Builder.defineMacro("IBOutlet", "__attribute__((iboutlet))");
    Builder.defineMacro("IBOutletCollection(ClassName)",
                        "__attribute__((iboutletcollection(ClassName)))");
    Builder.defineMacro("IBAction", "void)__attribute__((ibaction)");
  }

  if (LangOpts.getDuettoSide()==LangOptions::DUETTO_Client)
  {
    Builder.defineMacro("__DUETTO_CLIENT__");
  }
  else if (LangOpts.getDuettoSide()==LangOptions::DUETTO_Server)
  {
    Builder.defineMacro("__DUETTO_SERVER__");
  }

  // darwin_constant_cfstrings controls this. This is also dependent
  // on other things like the runtime I believe.  This is set even for C code.
  if (!LangOpts.NoConstantCFStrings)
      Builder.defineMacro("__CONSTANT_CFSTRINGS__");

  if (LangOpts.ObjC2)
    Builder.defineMacro("OBJC_NEW_PROPERTIES");

  if (LangOpts.PascalStrings)
    Builder.defineMacro("__PASCAL_STRINGS__");

  if (LangOpts.Blocks) {
    Builder.defineMacro("__block", "__attribute__((__blocks__(byref)))");
    Builder.defineMacro("__BLOCKS__");
  }
//.........这里部分代码省略.........