C++ TargetInfo::getTypeConstantSuffix方法代码示例

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);
}

//.........这里部分代码省略.........
  DefineTypeSize("__LONG_MAX__", TargetInfo::SignedLong, TI, Builder);
  DefineTypeSize("__LONG_LONG_MAX__", TargetInfo::SignedLongLong, TI, Builder);
  DefineTypeSize("__WCHAR_MAX__", TI.getWCharType(), TI, Builder);
  DefineTypeSize("__INTMAX_MAX__", TI.getIntMaxType(), TI, Builder);
  DefineTypeSize("__SIZE_MAX__", TI.getSizeType(), TI, Builder);

  DefineTypeSize("__UINTMAX_MAX__", TI.getUIntMaxType(), TI, Builder);
  DefineTypeSize("__PTRDIFF_MAX__", TI.getPtrDiffType(0), TI, Builder);
  DefineTypeSize("__INTPTR_MAX__", TI.getIntPtrType(), TI, Builder);
  DefineTypeSize("__UINTPTR_MAX__", TI.getUIntPtrType(), TI, Builder);

  DefineTypeSizeof("__SIZEOF_DOUBLE__", TI.getDoubleWidth(), TI, Builder);
  DefineTypeSizeof("__SIZEOF_FLOAT__", TI.getFloatWidth(), TI, Builder);
  DefineTypeSizeof("__SIZEOF_INT__", TI.getIntWidth(), TI, Builder);
  DefineTypeSizeof("__SIZEOF_LONG__", TI.getLongWidth(), TI, Builder);
  DefineTypeSizeof("__SIZEOF_LONG_DOUBLE__",TI.getLongDoubleWidth(),TI,Builder);
  DefineTypeSizeof("__SIZEOF_LONG_LONG__", TI.getLongLongWidth(), TI, Builder);
  DefineTypeSizeof("__SIZEOF_POINTER__", TI.getPointerWidth(0), TI, Builder);
  DefineTypeSizeof("__SIZEOF_SHORT__", TI.getShortWidth(), TI, Builder);
  DefineTypeSizeof("__SIZEOF_PTRDIFF_T__",
                   TI.getTypeWidth(TI.getPtrDiffType(0)), TI, Builder);
  DefineTypeSizeof("__SIZEOF_SIZE_T__",
                   TI.getTypeWidth(TI.getSizeType()), TI, Builder);
  DefineTypeSizeof("__SIZEOF_WCHAR_T__",
                   TI.getTypeWidth(TI.getWCharType()), TI, Builder);
  DefineTypeSizeof("__SIZEOF_WINT_T__",
                   TI.getTypeWidth(TI.getWIntType()), TI, Builder);
  if (TI.hasInt128Type())
    DefineTypeSizeof("__SIZEOF_INT128__", 128, TI, Builder);

  DefineType("__INTMAX_TYPE__", TI.getIntMaxType(), Builder);
  DefineFmt("__INTMAX", TI.getIntMaxType(), TI, Builder);
  Builder.defineMacro("__INTMAX_C_SUFFIX__",
                      TI.getTypeConstantSuffix(TI.getIntMaxType()));
  DefineType("__UINTMAX_TYPE__", TI.getUIntMaxType(), Builder);
  DefineFmt("__UINTMAX", TI.getUIntMaxType(), TI, Builder);
  Builder.defineMacro("__UINTMAX_C_SUFFIX__",
                      TI.getTypeConstantSuffix(TI.getUIntMaxType()));
  DefineTypeWidth("__INTMAX_WIDTH__",  TI.getIntMaxType(), TI, Builder);
  DefineType("__PTRDIFF_TYPE__", TI.getPtrDiffType(0), Builder);
  DefineFmt("__PTRDIFF", TI.getPtrDiffType(0), TI, Builder);
  DefineTypeWidth("__PTRDIFF_WIDTH__", TI.getPtrDiffType(0), TI, Builder);
  DefineType("__INTPTR_TYPE__", TI.getIntPtrType(), Builder);
  DefineFmt("__INTPTR", TI.getIntPtrType(), TI, Builder);
  DefineTypeWidth("__INTPTR_WIDTH__", TI.getIntPtrType(), TI, Builder);
  DefineType("__SIZE_TYPE__", TI.getSizeType(), Builder);
  DefineFmt("__SIZE", TI.getSizeType(), TI, Builder);
  DefineTypeWidth("__SIZE_WIDTH__", TI.getSizeType(), TI, Builder);
  DefineType("__WCHAR_TYPE__", TI.getWCharType(), Builder);
  DefineTypeWidth("__WCHAR_WIDTH__", TI.getWCharType(), TI, Builder);
  DefineType("__WINT_TYPE__", TI.getWIntType(), Builder);
  DefineTypeWidth("__WINT_WIDTH__", TI.getWIntType(), TI, Builder);
  DefineTypeWidth("__SIG_ATOMIC_WIDTH__", TI.getSigAtomicType(), TI, Builder);
  DefineTypeSize("__SIG_ATOMIC_MAX__", TI.getSigAtomicType(), TI, Builder);
  DefineType("__CHAR16_TYPE__", TI.getChar16Type(), Builder);
  DefineType("__CHAR32_TYPE__", TI.getChar32Type(), Builder);

  DefineTypeWidth("__UINTMAX_WIDTH__",  TI.getUIntMaxType(), TI, Builder);
  DefineType("__UINTPTR_TYPE__", TI.getUIntPtrType(), Builder);
  DefineFmt("__UINTPTR", TI.getUIntPtrType(), TI, Builder);
  DefineTypeWidth("__UINTPTR_WIDTH__", TI.getUIntPtrType(), TI, Builder);

  DefineFloatMacros(Builder, "FLT", &TI.getFloatFormat(), "F");
  DefineFloatMacros(Builder, "DBL", &TI.getDoubleFormat(), "");
  DefineFloatMacros(Builder, "LDBL", &TI.getLongDoubleFormat(), "L");

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");

    // C++1z [cpp.predefined]p1:
    //   An integer literal of type std::size_t whose value is the alignment
    //   guaranteed by a call to operator new(std::size_t)
    //
    // We provide this in all language modes, since it seems generally useful.
    Builder.defineMacro("__STDCPP_DEFAULT_NEW_ALIGNMENT__",
                        Twine(TI.getNewAlign() / TI.getCharWidth()) +
                            TI.getTypeConstantSuffix(TI.getSizeType()));
  }

  // 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 (TI.isLittleEndian())
      Builder.defineMacro("__ENDIAN_LITTLE__");

    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__");
//.........这里部分代码省略.........

/// DefineTypeSize - An overloaded helper that uses TargetInfo to determine
/// the width, suffix, and signedness of the given type
static void DefineTypeSize(const Twine &MacroName, TargetInfo::IntType Ty,
                           const TargetInfo &TI, MacroBuilder &Builder) {
  DefineTypeSize(MacroName, TI.getTypeWidth(Ty), TI.getTypeConstantSuffix(Ty), 
                 TI.isTypeSigned(Ty), Builder);
}

/// DefineTypeSize - An overloaded helper that uses TargetInfo to determine
/// the width, suffix, and signedness of the given type
static void DefineTypeSize(const char *MacroName, TargetInfo::IntType Ty,
                           const TargetInfo &TI, std::vector<char> &Buf) {
  DefineTypeSize(MacroName, TI.getTypeWidth(Ty), TI.getTypeConstantSuffix(Ty), 
                 TI.isTypeSigned(Ty), Buf);
}