| //===--- InitPreprocessor.cpp - PP initialization code. ---------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file implements the clang::InitializePreprocessor function. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "clang/Basic/Version.h" |
| #include "clang/Frontend/Utils.h" |
| #include "clang/Basic/MacroBuilder.h" |
| #include "clang/Basic/TargetInfo.h" |
| #include "clang/Frontend/FrontendDiagnostic.h" |
| #include "clang/Frontend/FrontendOptions.h" |
| #include "clang/Frontend/PreprocessorOptions.h" |
| #include "clang/Lex/HeaderSearch.h" |
| #include "clang/Lex/Preprocessor.h" |
| #include "clang/Basic/FileManager.h" |
| #include "clang/Basic/SourceManager.h" |
| #include "llvm/ADT/APFloat.h" |
| #include "llvm/Support/FileSystem.h" |
| #include "llvm/Support/MemoryBuffer.h" |
| #include "llvm/Support/Path.h" |
| using namespace clang; |
| |
| // 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; |
| Builder.defineMacro(MacroName, MacroBody.substr(0, End)); |
| } else { |
| // Push "macroname 1". |
| Builder.defineMacro(Macro); |
| } |
| } |
| |
| /// AddImplicitInclude - Add an implicit \#include of the specified file to the |
| /// predefines buffer. |
| static void AddImplicitInclude(MacroBuilder &Builder, StringRef File, |
| FileManager &FileMgr) { |
| Builder.append(Twine("#include \"") + |
| HeaderSearch::NormalizeDashIncludePath(File, FileMgr) + "\""); |
| } |
| |
| static void AddImplicitIncludeMacros(MacroBuilder &Builder, |
| StringRef File, |
| FileManager &FileMgr) { |
| Builder.append(Twine("#__include_macros \"") + |
| HeaderSearch::NormalizeDashIncludePath(File, FileMgr) + "\""); |
| // Marker token to stop the __include_macros fetch loop. |
| Builder.append("##"); // ##? |
| } |
| |
| /// AddImplicitIncludePTH - Add an implicit \#include using the original file |
| /// used to generate a PTH cache. |
| static void AddImplicitIncludePTH(MacroBuilder &Builder, Preprocessor &PP, |
| StringRef ImplicitIncludePTH) { |
| PTHManager *P = PP.getPTHManager(); |
| // Null check 'P' in the corner case where it couldn't be created. |
| const char *OriginalFile = P ? P->getOriginalSourceFile() : 0; |
| |
| if (!OriginalFile) { |
| PP.getDiagnostics().Report(diag::err_fe_pth_file_has_no_source_header) |
| << ImplicitIncludePTH; |
| return; |
| } |
| |
| AddImplicitInclude(Builder, OriginalFile, PP.getFileManager()); |
| } |
| |
| /// PickFP - This is used to pick a value based on the FP semantics of the |
| /// specified FP model. |
| template <typename T> |
| static T PickFP(const llvm::fltSemantics *Sem, T IEEESingleVal, |
| T IEEEDoubleVal, T X87DoubleExtendedVal, T PPCDoubleDoubleVal, |
| T IEEEQuadVal) { |
| if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEsingle) |
| return IEEESingleVal; |
| if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEdouble) |
| return IEEEDoubleVal; |
| if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::x87DoubleExtended) |
| return X87DoubleExtendedVal; |
| if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::PPCDoubleDouble) |
| return PPCDoubleDoubleVal; |
| assert(Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEquad); |
| return IEEEQuadVal; |
| } |
| |
| static void DefineFloatMacros(MacroBuilder &Builder, StringRef Prefix, |
| const llvm::fltSemantics *Sem) { |
| const char *DenormMin, *Epsilon, *Max, *Min; |
| DenormMin = PickFP(Sem, "1.40129846e-45F", "4.9406564584124654e-324", |
| "3.64519953188247460253e-4951L", |
| "4.94065645841246544176568792868221e-324L", |
| "6.47517511943802511092443895822764655e-4966L"); |
| int Digits = PickFP(Sem, 6, 15, 18, 31, 33); |
| Epsilon = PickFP(Sem, "1.19209290e-7F", "2.2204460492503131e-16", |
| "1.08420217248550443401e-19L", |
| "4.94065645841246544176568792868221e-324L", |
| "1.92592994438723585305597794258492732e-34L"); |
| int MantissaDigits = PickFP(Sem, 24, 53, 64, 106, 113); |
| int Min10Exp = PickFP(Sem, -37, -307, -4931, -291, -4931); |
| int Max10Exp = PickFP(Sem, 38, 308, 4932, 308, 4932); |
| int MinExp = PickFP(Sem, -125, -1021, -16381, -968, -16381); |
| int MaxExp = PickFP(Sem, 128, 1024, 16384, 1024, 16384); |
| Min = PickFP(Sem, "1.17549435e-38F", "2.2250738585072014e-308", |
| "3.36210314311209350626e-4932L", |
| "2.00416836000897277799610805135016e-292L", |
| "3.36210314311209350626267781732175260e-4932L"); |
| Max = PickFP(Sem, "3.40282347e+38F", "1.7976931348623157e+308", |
| "1.18973149535723176502e+4932L", |
| "1.79769313486231580793728971405301e+308L", |
| "1.18973149535723176508575932662800702e+4932L"); |
| |
| SmallString<32> DefPrefix; |
| DefPrefix = "__"; |
| DefPrefix += Prefix; |
| DefPrefix += "_"; |
| |
| Builder.defineMacro(DefPrefix + "DENORM_MIN__", DenormMin); |
| Builder.defineMacro(DefPrefix + "HAS_DENORM__"); |
| Builder.defineMacro(DefPrefix + "DIG__", Twine(Digits)); |
| Builder.defineMacro(DefPrefix + "EPSILON__", Twine(Epsilon)); |
| Builder.defineMacro(DefPrefix + "HAS_INFINITY__"); |
| Builder.defineMacro(DefPrefix + "HAS_QUIET_NAN__"); |
| Builder.defineMacro(DefPrefix + "MANT_DIG__", Twine(MantissaDigits)); |
| |
| Builder.defineMacro(DefPrefix + "MAX_10_EXP__", Twine(Max10Exp)); |
| Builder.defineMacro(DefPrefix + "MAX_EXP__", Twine(MaxExp)); |
| Builder.defineMacro(DefPrefix + "MAX__", Twine(Max)); |
| |
| Builder.defineMacro(DefPrefix + "MIN_10_EXP__","("+Twine(Min10Exp)+")"); |
| Builder.defineMacro(DefPrefix + "MIN_EXP__", "("+Twine(MinExp)+")"); |
| Builder.defineMacro(DefPrefix + "MIN__", Twine(Min)); |
| } |
| |
| |
| /// DefineTypeSize - Emit a macro to the predefines buffer that declares a macro |
| /// named MacroName with the max value for a type with width 'TypeWidth' a |
| /// signedness of 'isSigned' and with a value suffix of 'ValSuffix' (e.g. LL). |
| static void DefineTypeSize(StringRef MacroName, unsigned TypeWidth, |
| StringRef ValSuffix, bool isSigned, |
| MacroBuilder &Builder) { |
| llvm::APInt MaxVal = isSigned ? llvm::APInt::getSignedMaxValue(TypeWidth) |
| : llvm::APInt::getMaxValue(TypeWidth); |
| Builder.defineMacro(MacroName, MaxVal.toString(10, isSigned) + ValSuffix); |
| } |
| |
| /// DefineTypeSize - An overloaded helper that uses TargetInfo to determine |
| /// the width, suffix, and signedness of the given type |
| static void DefineTypeSize(StringRef MacroName, TargetInfo::IntType Ty, |
| const TargetInfo &TI, MacroBuilder &Builder) { |
| DefineTypeSize(MacroName, TI.getTypeWidth(Ty), TI.getTypeConstantSuffix(Ty), |
| TI.isTypeSigned(Ty), Builder); |
| } |
| |
| static void DefineType(const Twine &MacroName, TargetInfo::IntType Ty, |
| MacroBuilder &Builder) { |
| Builder.defineMacro(MacroName, TargetInfo::getTypeName(Ty)); |
| } |
| |
| static void DefineTypeWidth(StringRef MacroName, TargetInfo::IntType Ty, |
| const TargetInfo &TI, MacroBuilder &Builder) { |
| Builder.defineMacro(MacroName, Twine(TI.getTypeWidth(Ty))); |
| } |
| |
| static void DefineTypeSizeof(StringRef MacroName, unsigned BitWidth, |
| const TargetInfo &TI, MacroBuilder &Builder) { |
| Builder.defineMacro(MacroName, |
| Twine(BitWidth / TI.getCharWidth())); |
| } |
| |
| 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); |
| } |
| |
| /// Get the value the ATOMIC_*_LOCK_FREE macro should have for a type with |
| /// the specified properties. |
| static const char *getLockFreeValue(unsigned TypeWidth, unsigned TypeAlign, |
| unsigned InlineWidth) { |
| // Fully-aligned, power-of-2 sizes no larger than the inline |
| // width will be inlined as lock-free operations. |
| if (TypeWidth == TypeAlign && (TypeWidth & (TypeWidth - 1)) == 0 && |
| TypeWidth <= InlineWidth) |
| return "2"; // "always lock free" |
| // We cannot be certain what operations the lib calls might be |
| // able to implement as lock-free on future processors. |
| return "1"; // "sometimes lock free" |
| } |
| |
| /// \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); |
| } |
| |
| static void InitializeStandardPredefinedMacros(const TargetInfo &TI, |
| const LangOptions &LangOpts, |
| const FrontendOptions &FEOpts, |
| MacroBuilder &Builder) { |
| if (!LangOpts.MicrosoftMode && !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 { |
| // C++11 [cpp.predefined]p1: |
| // The name __cplusplus is defined to the value 201103L when compiling a |
| // C++ translation unit. |
| if (LangOpts.CPlusPlus0x) |
| 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"); |
| } |
| |
| 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 |
| 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.CPlusPlus0x) |
| 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)"); |
| } |
| |
| // 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++ headers. |
| if (LangOpts.WChar) { |
| // wchar_t supported as a keyword. |
| Builder.defineMacro("_WCHAR_T_DEFINED"); |
| Builder.defineMacro("_NATIVE_WCHAR_T_DEFINED"); |
| } |
| if (LangOpts.CPlusPlus) { |
| // FIXME: Support Microsoft's __identifier extension in the lexer. |
| Builder.append("#define __identifier(x) x"); |
| Builder.append("class type_info;"); |
| } |
| } |
| |
| if (LangOpts.Optimize) |
| Builder.defineMacro("__OPTIMIZE__"); |
| if (LangOpts.OptimizeSize) |
| Builder.defineMacro("__OPTIMIZE_SIZE__"); |
| |
| if (LangOpts.FastMath) |
| Builder.defineMacro("__FAST_MATH__"); |
| |
| // Initialize target-specific preprocessor defines. |
| |
| // __BYTE_ORDER__ was added in GCC 4.6. It's analogous |
| // to the macro __BYTE_ORDER (no trailing underscores) |
| // from glibc's <endian.h> header. |
| // We don't support the PDP-11 as a target, but include |
| // the define so it can still be compared against. |
| Builder.defineMacro("__ORDER_LITTLE_ENDIAN__", "1234"); |
| Builder.defineMacro("__ORDER_BIG_ENDIAN__", "4321"); |
| Builder.defineMacro("__ORDER_PDP_ENDIAN__", "3412"); |
| if (TI.isBigEndian()) |
| Builder.defineMacro("__BYTE_ORDER__", "__ORDER_BIG_ENDIAN__"); |
| else |
| Builder.defineMacro("__BYTE_ORDER__", "__ORDER_LITTLE_ENDIAN__"); |
| |
| |
| if (TI.getPointerWidth(0) == 64 && TI.getLongWidth() == 64 |
| && TI.getIntWidth() == 32) { |
| Builder.defineMacro("_LP64"); |
| Builder.defineMacro("__LP64__"); |
| } |
| |
| // Define type sizing macros based on the target properties. |
| assert(TI.getCharWidth() == 8 && "Only support 8-bit char so far"); |
| Builder.defineMacro("__CHAR_BIT__", "8"); |
| |
| DefineTypeSize("__SCHAR_MAX__", TI.getCharWidth(), "", true, Builder); |
| DefineTypeSize("__SHRT_MAX__", TargetInfo::SignedShort, TI, Builder); |
| DefineTypeSize("__INT_MAX__", TargetInfo::SignedInt, TI, Builder); |
| 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); |
| |
| 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); |
| |
| DefineType("__INTMAX_TYPE__", TI.getIntMaxType(), Builder); |
| DefineType("__UINTMAX_TYPE__", TI.getUIntMaxType(), Builder); |
| DefineTypeWidth("__INTMAX_WIDTH__", TI.getIntMaxType(), TI, Builder); |
| DefineType("__PTRDIFF_TYPE__", TI.getPtrDiffType(0), Builder); |
| DefineTypeWidth("__PTRDIFF_WIDTH__", TI.getPtrDiffType(0), TI, Builder); |
| DefineType("__INTPTR_TYPE__", TI.getIntPtrType(), Builder); |
| DefineTypeWidth("__INTPTR_WIDTH__", TI.getIntPtrType(), TI, Builder); |
| DefineType("__SIZE_TYPE__", TI.getSizeType(), 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); |
| DefineType("__CHAR16_TYPE__", TI.getChar16Type(), Builder); |
| DefineType("__CHAR32_TYPE__", TI.getChar32Type(), Builder); |
| |
| DefineFloatMacros(Builder, "FLT", &TI.getFloatFormat()); |
| DefineFloatMacros(Builder, "DBL", &TI.getDoubleFormat()); |
| DefineFloatMacros(Builder, "LDBL", &TI.getLongDoubleFormat()); |
| |
| // Define a __POINTER_WIDTH__ macro for stdint.h. |
| Builder.defineMacro("__POINTER_WIDTH__", |
| Twine((int)TI.getPointerWidth(0))); |
| |
| if (!LangOpts.CharIsSigned) |
| Builder.defineMacro("__CHAR_UNSIGNED__"); |
| |
| if (!TargetInfo::isTypeSigned(TI.getWCharType())) |
| Builder.defineMacro("__WCHAR_UNSIGNED__"); |
| |
| if (!TargetInfo::isTypeSigned(TI.getWIntType())) |
| Builder.defineMacro("__WINT_UNSIGNED__"); |
| |
| // Define exact-width integer types for stdint.h |
| Builder.defineMacro("__INT" + Twine(TI.getCharWidth()) + "_TYPE__", |
| "char"); |
| |
| if (TI.getShortWidth() > TI.getCharWidth()) |
| DefineExactWidthIntType(TargetInfo::SignedShort, TI, Builder); |
| |
| if (TI.getIntWidth() > TI.getShortWidth()) |
| DefineExactWidthIntType(TargetInfo::SignedInt, TI, Builder); |
| |
| if (TI.getLongWidth() > TI.getIntWidth()) |
| DefineExactWidthIntType(TargetInfo::SignedLong, TI, Builder); |
| |
| if (TI.getLongLongWidth() > TI.getLongWidth()) |
| DefineExactWidthIntType(TargetInfo::SignedLongLong, TI, Builder); |
| |
| if (const char *Prefix = TI.getUserLabelPrefix()) |
| Builder.defineMacro("__USER_LABEL_PREFIX__", Prefix); |
| |
| if (LangOpts.FastMath || LangOpts.FiniteMathOnly) |
| Builder.defineMacro("__FINITE_MATH_ONLY__", "1"); |
| else |
| Builder.defineMacro("__FINITE_MATH_ONLY__", "0"); |
| |
| if (LangOpts.GNUInline) |
| Builder.defineMacro("__GNUC_GNU_INLINE__"); |
| else |
| Builder.defineMacro("__GNUC_STDC_INLINE__"); |
| |
| // The value written by __atomic_test_and_set. |
| // FIXME: This is target-dependent. |
| Builder.defineMacro("__GCC_ATOMIC_TEST_AND_SET_TRUEVAL", "1"); |
| |
| // Used by libstdc++ to implement ATOMIC_<foo>_LOCK_FREE. |
| unsigned InlineWidthBits = TI.getMaxAtomicInlineWidth(); |
| #define DEFINE_LOCK_FREE_MACRO(TYPE, Type) \ |
| Builder.defineMacro("__GCC_ATOMIC_" #TYPE "_LOCK_FREE", \ |
| getLockFreeValue(TI.get##Type##Width(), \ |
| TI.get##Type##Align(), \ |
| InlineWidthBits)); |
| DEFINE_LOCK_FREE_MACRO(BOOL, Bool); |
| DEFINE_LOCK_FREE_MACRO(CHAR, Char); |
| DEFINE_LOCK_FREE_MACRO(CHAR16_T, Char16); |
| DEFINE_LOCK_FREE_MACRO(CHAR32_T, Char32); |
| DEFINE_LOCK_FREE_MACRO(WCHAR_T, WChar); |
| DEFINE_LOCK_FREE_MACRO(SHORT, Short); |
| DEFINE_LOCK_FREE_MACRO(INT, Int); |
| DEFINE_LOCK_FREE_MACRO(LONG, Long); |
| DEFINE_LOCK_FREE_MACRO(LLONG, LongLong); |
| Builder.defineMacro("__GCC_ATOMIC_POINTER_LOCK_FREE", |
| getLockFreeValue(TI.getPointerWidth(0), |
| TI.getPointerAlign(0), |
| InlineWidthBits)); |
| #undef DEFINE_LOCK_FREE_MACRO |
| |
| if (LangOpts.NoInlineDefine) |
| Builder.defineMacro("__NO_INLINE__"); |
| |
| if (unsigned PICLevel = LangOpts.PICLevel) { |
| Builder.defineMacro("__PIC__", Twine(PICLevel)); |
| Builder.defineMacro("__pic__", Twine(PICLevel)); |
| } |
| if (unsigned PIELevel = LangOpts.PIELevel) { |
| Builder.defineMacro("__PIE__", Twine(PIELevel)); |
| Builder.defineMacro("__pie__", Twine(PIELevel)); |
| } |
| |
| // Macros to control C99 numerics and <float.h> |
| Builder.defineMacro("__FLT_EVAL_METHOD__", Twine(TI.getFloatEvalMethod())); |
| Builder.defineMacro("__FLT_RADIX__", "2"); |
| int Dig = PickFP(&TI.getLongDoubleFormat(), -1/*FIXME*/, 17, 21, 33, 36); |
| Builder.defineMacro("__DECIMAL_DIG__", Twine(Dig)); |
| |
| if (LangOpts.getStackProtector() == LangOptions::SSPOn) |
| Builder.defineMacro("__SSP__"); |
| else if (LangOpts.getStackProtector() == LangOptions::SSPReq) |
| Builder.defineMacro("__SSP_ALL__", "2"); |
| |
| if (FEOpts.ProgramAction == frontend::RewriteObjC) |
| Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))"); |
| |
| // Define a macro that exists only when using the static analyzer. |
| if (FEOpts.ProgramAction == frontend::RunAnalysis) |
| Builder.defineMacro("__clang_analyzer__"); |
| |
| if (LangOpts.FastRelaxedMath) |
| Builder.defineMacro("__FAST_RELAXED_MATH__"); |
| |
| if (LangOpts.ObjCAutoRefCount) { |
| Builder.defineMacro("__weak", "__attribute__((objc_ownership(weak)))"); |
| Builder.defineMacro("__strong", "__attribute__((objc_ownership(strong)))"); |
| Builder.defineMacro("__autoreleasing", |
| "__attribute__((objc_ownership(autoreleasing)))"); |
| Builder.defineMacro("__unsafe_unretained", |
| "__attribute__((objc_ownership(none)))"); |
| } |
| |
| // Get other target #defines. |
| TI.getTargetDefines(LangOpts, Builder); |
| } |
| |
| // Initialize the remapping of files to alternative contents, e.g., |
| // those specified through other files. |
| static void InitializeFileRemapping(DiagnosticsEngine &Diags, |
| SourceManager &SourceMgr, |
| FileManager &FileMgr, |
| const PreprocessorOptions &InitOpts) { |
| // Remap files in the source manager (with buffers). |
| for (PreprocessorOptions::const_remapped_file_buffer_iterator |
| Remap = InitOpts.remapped_file_buffer_begin(), |
| RemapEnd = InitOpts.remapped_file_buffer_end(); |
| Remap != RemapEnd; |
| ++Remap) { |
| // Create the file entry for the file that we're mapping from. |
| const FileEntry *FromFile = FileMgr.getVirtualFile(Remap->first, |
| Remap->second->getBufferSize(), |
| 0); |
| if (!FromFile) { |
| Diags.Report(diag::err_fe_remap_missing_from_file) |
| << Remap->first; |
| if (!InitOpts.RetainRemappedFileBuffers) |
| delete Remap->second; |
| continue; |
| } |
| |
| // Override the contents of the "from" file with the contents of |
| // the "to" file. |
| SourceMgr.overrideFileContents(FromFile, Remap->second, |
| InitOpts.RetainRemappedFileBuffers); |
| } |
| |
| // Remap files in the source manager (with other files). |
| for (PreprocessorOptions::const_remapped_file_iterator |
| Remap = InitOpts.remapped_file_begin(), |
| RemapEnd = InitOpts.remapped_file_end(); |
| Remap != RemapEnd; |
| ++Remap) { |
| // Find the file that we're mapping to. |
| const FileEntry *ToFile = FileMgr.getFile(Remap->second); |
| if (!ToFile) { |
| Diags.Report(diag::err_fe_remap_missing_to_file) |
| << Remap->first << Remap->second; |
| continue; |
| } |
| |
| // Create the file entry for the file that we're mapping from. |
| const FileEntry *FromFile = FileMgr.getVirtualFile(Remap->first, |
| ToFile->getSize(), 0); |
| if (!FromFile) { |
| Diags.Report(diag::err_fe_remap_missing_from_file) |
| << Remap->first; |
| continue; |
| } |
| |
| // Override the contents of the "from" file with the contents of |
| // the "to" file. |
| SourceMgr.overrideFileContents(FromFile, ToFile); |
| } |
| |
| SourceMgr.setOverridenFilesKeepOriginalName( |
| InitOpts.RemappedFilesKeepOriginalName); |
| } |
| |
| /// InitializePreprocessor - Initialize the preprocessor getting it and the |
| /// environment ready to process a single file. This returns true on error. |
| /// |
| void clang::InitializePreprocessor(Preprocessor &PP, |
| const PreprocessorOptions &InitOpts, |
| const HeaderSearchOptions &HSOpts, |
| const FrontendOptions &FEOpts) { |
| const LangOptions &LangOpts = PP.getLangOpts(); |
| std::string PredefineBuffer; |
| PredefineBuffer.reserve(4080); |
| llvm::raw_string_ostream Predefines(PredefineBuffer); |
| MacroBuilder Builder(Predefines); |
| |
| InitializeFileRemapping(PP.getDiagnostics(), PP.getSourceManager(), |
| PP.getFileManager(), InitOpts); |
| |
| // Emit line markers for various builtin sections of the file. We don't do |
| // this in asm preprocessor mode, because "# 4" is not a line marker directive |
| // in this mode. |
| if (!PP.getLangOpts().AsmPreprocessor) |
| Builder.append("# 1 \"<built-in>\" 3"); |
| |
| // Install things like __POWERPC__, __GNUC__, etc into the macro table. |
| if (InitOpts.UsePredefines) { |
| InitializePredefinedMacros(PP.getTargetInfo(), LangOpts, FEOpts, Builder); |
| |
| // Install definitions to make Objective-C++ ARC work well with various |
| // C++ Standard Library implementations. |
| if (LangOpts.ObjC1 && LangOpts.CPlusPlus && LangOpts.ObjCAutoRefCount) { |
| switch (InitOpts.ObjCXXARCStandardLibrary) { |
| case ARCXX_nolib: |
| case ARCXX_libcxx: |
| break; |
| |
| case ARCXX_libstdcxx: |
| AddObjCXXARCLibstdcxxDefines(LangOpts, Builder); |
| break; |
| } |
| } |
| } |
| |
| // Even with predefines off, some macros are still predefined. |
| // These should all be defined in the preprocessor according to the |
| // current language configuration. |
| InitializeStandardPredefinedMacros(PP.getTargetInfo(), PP.getLangOpts(), |
| FEOpts, Builder); |
| |
| // Add on the predefines from the driver. Wrap in a #line directive to report |
| // that they come from the command line. |
| if (!PP.getLangOpts().AsmPreprocessor) |
| Builder.append("# 1 \"<command line>\" 1"); |
| |
| // Process #define's and #undef's in the order they are given. |
| for (unsigned i = 0, e = InitOpts.Macros.size(); i != e; ++i) { |
| if (InitOpts.Macros[i].second) // isUndef |
| Builder.undefineMacro(InitOpts.Macros[i].first); |
| else |
| DefineBuiltinMacro(Builder, InitOpts.Macros[i].first, |
| PP.getDiagnostics()); |
| } |
| |
| // If -imacros are specified, include them now. These are processed before |
| // any -include directives. |
| for (unsigned i = 0, e = InitOpts.MacroIncludes.size(); i != e; ++i) |
| AddImplicitIncludeMacros(Builder, InitOpts.MacroIncludes[i], |
| PP.getFileManager()); |
| |
| // Process -include directives. |
| for (unsigned i = 0, e = InitOpts.Includes.size(); i != e; ++i) { |
| const std::string &Path = InitOpts.Includes[i]; |
| if (Path == InitOpts.ImplicitPTHInclude) |
| AddImplicitIncludePTH(Builder, PP, Path); |
| else |
| AddImplicitInclude(Builder, Path, PP.getFileManager()); |
| } |
| |
| // Exit the command line and go back to <built-in> (2 is LC_LEAVE). |
| if (!PP.getLangOpts().AsmPreprocessor) |
| Builder.append("# 1 \"<built-in>\" 2"); |
| |
| // Instruct the preprocessor to skip the preamble. |
| PP.setSkipMainFilePreamble(InitOpts.PrecompiledPreambleBytes.first, |
| InitOpts.PrecompiledPreambleBytes.second); |
| |
| // Copy PredefinedBuffer into the Preprocessor. |
| PP.setPredefines(Predefines.str()); |
| |
| // Initialize the header search object. |
| ApplyHeaderSearchOptions(PP.getHeaderSearchInfo(), HSOpts, |
| PP.getLangOpts(), |
| PP.getTargetInfo().getTriple()); |
| } |