| //===--- 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/Frontend/Utils.h" |
| #include "clang/Basic/TargetInfo.h" |
| #include "clang/Frontend/FrontendDiagnostic.h" |
| #include "clang/Frontend/PreprocessorOptions.h" |
| #include "clang/Lex/Preprocessor.h" |
| #include "clang/Basic/FileManager.h" |
| #include "clang/Basic/SourceManager.h" |
| #include "llvm/ADT/StringExtras.h" |
| #include "llvm/ADT/StringMap.h" |
| #include "llvm/ADT/STLExtras.h" |
| #include "llvm/Support/MemoryBuffer.h" |
| #include "llvm/System/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(std::vector<char> &Buf, const char *Macro, |
| Diagnostic *Diags = 0) { |
| const char *Command = "#define "; |
| Buf.insert(Buf.end(), Command, Command+strlen(Command)); |
| if (const char *Equal = strchr(Macro, '=')) { |
| // Turn the = into ' '. |
| Buf.insert(Buf.end(), Macro, Equal); |
| Buf.push_back(' '); |
| |
| // Per GCC -D semantics, the macro ends at \n if it exists. |
| const char *End = strpbrk(Equal, "\n\r"); |
| if (End) { |
| assert(Diags && "Unexpected macro with embedded newline!"); |
| Diags->Report(diag::warn_fe_macro_contains_embedded_newline) |
| << std::string(Macro, Equal); |
| } else { |
| End = Equal+strlen(Equal); |
| } |
| |
| Buf.insert(Buf.end(), Equal+1, End); |
| } else { |
| // Push "macroname 1". |
| Buf.insert(Buf.end(), Macro, Macro+strlen(Macro)); |
| Buf.push_back(' '); |
| Buf.push_back('1'); |
| } |
| Buf.push_back('\n'); |
| } |
| |
| // Append a #undef line to Buf for Macro. Macro should be of the form XXX |
| // and we emit "#undef XXX". |
| static void UndefineBuiltinMacro(std::vector<char> &Buf, const char *Macro) { |
| // Push "macroname". |
| const char *Command = "#undef "; |
| Buf.insert(Buf.end(), Command, Command+strlen(Command)); |
| Buf.insert(Buf.end(), Macro, Macro+strlen(Macro)); |
| Buf.push_back('\n'); |
| } |
| |
| std::string clang::NormalizeDashIncludePath(llvm::StringRef File) { |
| // Implicit include paths should be resolved relative to the current |
| // working directory first, and then use the regular header search |
| // mechanism. The proper way to handle this is to have the |
| // predefines buffer located at the current working directory, but |
| // it has not file entry. For now, workaround this by using an |
| // absolute path if we find the file here, and otherwise letting |
| // header search handle it. |
| llvm::sys::Path Path(File); |
| Path.makeAbsolute(); |
| if (!Path.exists()) |
| Path = File; |
| |
| return Lexer::Stringify(Path.str()); |
| } |
| |
| /// Add the quoted name of an implicit include file. |
| static void AddQuotedIncludePath(std::vector<char> &Buf, |
| const std::string &File) { |
| |
| // Escape double quotes etc. |
| Buf.push_back('"'); |
| std::string EscapedFile = NormalizeDashIncludePath(File); |
| Buf.insert(Buf.end(), EscapedFile.begin(), EscapedFile.end()); |
| Buf.push_back('"'); |
| } |
| |
| /// AddImplicitInclude - Add an implicit #include of the specified file to the |
| /// predefines buffer. |
| static void AddImplicitInclude(std::vector<char> &Buf, |
| const std::string &File) { |
| const char *Inc = "#include "; |
| Buf.insert(Buf.end(), Inc, Inc+strlen(Inc)); |
| AddQuotedIncludePath(Buf, File); |
| Buf.push_back('\n'); |
| } |
| |
| static void AddImplicitIncludeMacros(std::vector<char> &Buf, |
| const std::string &File) { |
| const char *Inc = "#__include_macros "; |
| Buf.insert(Buf.end(), Inc, Inc+strlen(Inc)); |
| AddQuotedIncludePath(Buf, File); |
| Buf.push_back('\n'); |
| // Marker token to stop the __include_macros fetch loop. |
| const char *Marker = "##\n"; // ##? |
| Buf.insert(Buf.end(), Marker, Marker+strlen(Marker)); |
| } |
| |
| /// AddImplicitIncludePTH - Add an implicit #include using the original file |
| /// used to generate a PTH cache. |
| static void AddImplicitIncludePTH(std::vector<char> &Buf, Preprocessor &PP, |
| const std::string& ImplicitIncludePTH) { |
| PTHManager *P = PP.getPTHManager(); |
| assert(P && "No PTHManager."); |
| const char *OriginalFile = P->getOriginalSourceFile(); |
| |
| if (!OriginalFile) { |
| PP.getDiagnostics().Report(diag::err_fe_pth_file_has_no_source_header) |
| << ImplicitIncludePTH; |
| return; |
| } |
| |
| AddImplicitInclude(Buf, OriginalFile); |
| } |
| |
| /// 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(std::vector<char> &Buf, const char *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 HasInifinity = 1, HasQuietNaN = 1; |
| 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"); |
| |
| char MacroBuf[100]; |
| sprintf(MacroBuf, "__%s_DENORM_MIN__=%s", Prefix, DenormMin); |
| DefineBuiltinMacro(Buf, MacroBuf); |
| sprintf(MacroBuf, "__%s_DIG__=%d", Prefix, Digits); |
| DefineBuiltinMacro(Buf, MacroBuf); |
| sprintf(MacroBuf, "__%s_EPSILON__=%s", Prefix, Epsilon); |
| DefineBuiltinMacro(Buf, MacroBuf); |
| sprintf(MacroBuf, "__%s_HAS_INFINITY__=%d", Prefix, HasInifinity); |
| DefineBuiltinMacro(Buf, MacroBuf); |
| sprintf(MacroBuf, "__%s_HAS_QUIET_NAN__=%d", Prefix, HasQuietNaN); |
| DefineBuiltinMacro(Buf, MacroBuf); |
| sprintf(MacroBuf, "__%s_MANT_DIG__=%d", Prefix, MantissaDigits); |
| DefineBuiltinMacro(Buf, MacroBuf); |
| sprintf(MacroBuf, "__%s_MAX_10_EXP__=%d", Prefix, Max10Exp); |
| DefineBuiltinMacro(Buf, MacroBuf); |
| sprintf(MacroBuf, "__%s_MAX_EXP__=%d", Prefix, MaxExp); |
| DefineBuiltinMacro(Buf, MacroBuf); |
| sprintf(MacroBuf, "__%s_MAX__=%s", Prefix, Max); |
| DefineBuiltinMacro(Buf, MacroBuf); |
| sprintf(MacroBuf, "__%s_MIN_10_EXP__=(%d)", Prefix, Min10Exp); |
| DefineBuiltinMacro(Buf, MacroBuf); |
| sprintf(MacroBuf, "__%s_MIN_EXP__=(%d)", Prefix, MinExp); |
| DefineBuiltinMacro(Buf, MacroBuf); |
| sprintf(MacroBuf, "__%s_MIN__=%s", Prefix, Min); |
| DefineBuiltinMacro(Buf, MacroBuf); |
| sprintf(MacroBuf, "__%s_HAS_DENORM__=1", Prefix); |
| DefineBuiltinMacro(Buf, MacroBuf); |
| } |
| |
| |
| /// 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(const char *MacroName, unsigned TypeWidth, |
| const char *ValSuffix, bool isSigned, |
| std::vector<char> &Buf) { |
| char MacroBuf[60]; |
| long long MaxVal; |
| if (isSigned) |
| MaxVal = (1LL << (TypeWidth - 1)) - 1; |
| else |
| MaxVal = ~0LL >> (64-TypeWidth); |
| |
| // FIXME: Switch to using raw_ostream and avoid utostr(). |
| sprintf(MacroBuf, "%s=%s%s", MacroName, llvm::utostr(MaxVal).c_str(), |
| ValSuffix); |
| DefineBuiltinMacro(Buf, MacroBuf); |
| } |
| |
| /// 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); |
| } |
| |
| static void DefineType(const char *MacroName, TargetInfo::IntType Ty, |
| std::vector<char> &Buf) { |
| char MacroBuf[60]; |
| sprintf(MacroBuf, "%s=%s", MacroName, TargetInfo::getTypeName(Ty)); |
| DefineBuiltinMacro(Buf, MacroBuf); |
| } |
| |
| static void DefineTypeWidth(const char *MacroName, TargetInfo::IntType Ty, |
| const TargetInfo &TI, std::vector<char> &Buf) { |
| char MacroBuf[60]; |
| sprintf(MacroBuf, "%s=%d", MacroName, TI.getTypeWidth(Ty)); |
| DefineBuiltinMacro(Buf, MacroBuf); |
| } |
| |
| static void DefineExactWidthIntType(TargetInfo::IntType Ty, |
| const TargetInfo &TI, std::vector<char> &Buf) { |
| char MacroBuf[60]; |
| int TypeWidth = TI.getTypeWidth(Ty); |
| sprintf(MacroBuf, "__INT%d_TYPE__", TypeWidth); |
| DefineType(MacroBuf, Ty, Buf); |
| |
| |
| const char *ConstSuffix = TargetInfo::getTypeConstantSuffix(Ty); |
| if (strlen(ConstSuffix) > 0) { |
| sprintf(MacroBuf, "__INT%d_C_SUFFIX__=%s", TypeWidth, ConstSuffix); |
| DefineBuiltinMacro(Buf, MacroBuf); |
| } |
| } |
| |
| static void InitializePredefinedMacros(const TargetInfo &TI, |
| const LangOptions &LangOpts, |
| std::vector<char> &Buf) { |
| char MacroBuf[60]; |
| // Compiler version introspection macros. |
| DefineBuiltinMacro(Buf, "__llvm__=1"); // LLVM Backend |
| DefineBuiltinMacro(Buf, "__clang__=1"); // Clang Frontend |
| |
| // Currently claim to be compatible with GCC 4.2.1-5621. |
| DefineBuiltinMacro(Buf, "__GNUC_MINOR__=2"); |
| DefineBuiltinMacro(Buf, "__GNUC_PATCHLEVEL__=1"); |
| DefineBuiltinMacro(Buf, "__GNUC__=4"); |
| DefineBuiltinMacro(Buf, "__GXX_ABI_VERSION=1002"); |
| DefineBuiltinMacro(Buf, "__VERSION__=\"4.2.1 Compatible Clang Compiler\""); |
| |
| |
| // Initialize language-specific preprocessor defines. |
| |
| // These should all be defined in the preprocessor according to the |
| // current language configuration. |
| if (!LangOpts.Microsoft) |
| DefineBuiltinMacro(Buf, "__STDC__=1"); |
| if (LangOpts.AsmPreprocessor) |
| DefineBuiltinMacro(Buf, "__ASSEMBLER__=1"); |
| |
| if (!LangOpts.CPlusPlus) { |
| if (LangOpts.C99) |
| DefineBuiltinMacro(Buf, "__STDC_VERSION__=199901L"); |
| else if (!LangOpts.GNUMode && LangOpts.Digraphs) |
| DefineBuiltinMacro(Buf, "__STDC_VERSION__=199409L"); |
| } |
| |
| // Standard conforming mode? |
| if (!LangOpts.GNUMode) |
| DefineBuiltinMacro(Buf, "__STRICT_ANSI__=1"); |
| |
| if (LangOpts.CPlusPlus0x) |
| DefineBuiltinMacro(Buf, "__GXX_EXPERIMENTAL_CXX0X__"); |
| |
| if (LangOpts.Freestanding) |
| DefineBuiltinMacro(Buf, "__STDC_HOSTED__=0"); |
| else |
| DefineBuiltinMacro(Buf, "__STDC_HOSTED__=1"); |
| |
| if (LangOpts.ObjC1) { |
| DefineBuiltinMacro(Buf, "__OBJC__=1"); |
| if (LangOpts.ObjCNonFragileABI) { |
| DefineBuiltinMacro(Buf, "__OBJC2__=1"); |
| DefineBuiltinMacro(Buf, "OBJC_ZEROCOST_EXCEPTIONS=1"); |
| } |
| |
| if (LangOpts.getGCMode() != LangOptions::NonGC) |
| DefineBuiltinMacro(Buf, "__OBJC_GC__=1"); |
| |
| if (LangOpts.NeXTRuntime) |
| DefineBuiltinMacro(Buf, "__NEXT_RUNTIME__=1"); |
| } |
| |
| // darwin_constant_cfstrings controls this. This is also dependent |
| // on other things like the runtime I believe. This is set even for C code. |
| DefineBuiltinMacro(Buf, "__CONSTANT_CFSTRINGS__=1"); |
| |
| if (LangOpts.ObjC2) |
| DefineBuiltinMacro(Buf, "OBJC_NEW_PROPERTIES"); |
| |
| if (LangOpts.PascalStrings) |
| DefineBuiltinMacro(Buf, "__PASCAL_STRINGS__"); |
| |
| if (LangOpts.Blocks) { |
| DefineBuiltinMacro(Buf, "__block=__attribute__((__blocks__(byref)))"); |
| DefineBuiltinMacro(Buf, "__BLOCKS__=1"); |
| } |
| |
| if (LangOpts.Exceptions) |
| DefineBuiltinMacro(Buf, "__EXCEPTIONS=1"); |
| |
| if (LangOpts.CPlusPlus) { |
| DefineBuiltinMacro(Buf, "__DEPRECATED=1"); |
| DefineBuiltinMacro(Buf, "__GNUG__=4"); |
| DefineBuiltinMacro(Buf, "__GXX_WEAK__=1"); |
| if (LangOpts.GNUMode) |
| DefineBuiltinMacro(Buf, "__cplusplus=1"); |
| else |
| // C++ [cpp.predefined]p1: |
| // The name_ _cplusplusis defined to the value199711Lwhen compiling a |
| // C++ translation unit. |
| DefineBuiltinMacro(Buf, "__cplusplus=199711L"); |
| DefineBuiltinMacro(Buf, "__private_extern__=extern"); |
| // Ugly hack to work with GNU libstdc++. |
| DefineBuiltinMacro(Buf, "_GNU_SOURCE=1"); |
| } |
| |
| if (LangOpts.Microsoft) { |
| // Filter out some microsoft extensions when trying to parse in ms-compat |
| // mode. |
| DefineBuiltinMacro(Buf, "__int8=__INT8_TYPE__"); |
| DefineBuiltinMacro(Buf, "__int16=__INT16_TYPE__"); |
| DefineBuiltinMacro(Buf, "__int32=__INT32_TYPE__"); |
| DefineBuiltinMacro(Buf, "__int64=__INT64_TYPE__"); |
| // Both __PRETTY_FUNCTION__ and __FUNCTION__ are GCC extensions, however |
| // VC++ appears to only like __FUNCTION__. |
| DefineBuiltinMacro(Buf, "__PRETTY_FUNCTION__=__FUNCTION__"); |
| // Work around some issues with Visual C++ headerws. |
| if (LangOpts.CPlusPlus) { |
| // Since we define wchar_t in C++ mode. |
| DefineBuiltinMacro(Buf, "_WCHAR_T_DEFINED=1"); |
| DefineBuiltinMacro(Buf, "_NATIVE_WCHAR_T_DEFINED=1"); |
| // FIXME: This should be temporary until we have a __pragma |
| // solution, to avoid some errors flagged in VC++ headers. |
| DefineBuiltinMacro(Buf, "_CRT_SECURE_CPP_OVERLOAD_SECURE_NAMES=0"); |
| } |
| } |
| |
| if (LangOpts.Optimize) |
| DefineBuiltinMacro(Buf, "__OPTIMIZE__=1"); |
| if (LangOpts.OptimizeSize) |
| DefineBuiltinMacro(Buf, "__OPTIMIZE_SIZE__=1"); |
| |
| // Initialize target-specific preprocessor defines. |
| |
| // Define type sizing macros based on the target properties. |
| assert(TI.getCharWidth() == 8 && "Only support 8-bit char so far"); |
| DefineBuiltinMacro(Buf, "__CHAR_BIT__=8"); |
| |
| DefineTypeSize("__SCHAR_MAX__", TI.getCharWidth(), "", true, Buf); |
| DefineTypeSize("__SHRT_MAX__", TargetInfo::SignedShort, TI, Buf); |
| DefineTypeSize("__INT_MAX__", TargetInfo::SignedInt, TI, Buf); |
| DefineTypeSize("__LONG_MAX__", TargetInfo::SignedLong, TI, Buf); |
| DefineTypeSize("__LONG_LONG_MAX__", TargetInfo::SignedLongLong, TI, Buf); |
| DefineTypeSize("__WCHAR_MAX__", TI.getWCharType(), TI, Buf); |
| DefineTypeSize("__INTMAX_MAX__", TI.getIntMaxType(), TI, Buf); |
| |
| DefineType("__INTMAX_TYPE__", TI.getIntMaxType(), Buf); |
| DefineType("__UINTMAX_TYPE__", TI.getUIntMaxType(), Buf); |
| DefineTypeWidth("__INTMAX_WIDTH__", TI.getIntMaxType(), TI, Buf); |
| DefineType("__PTRDIFF_TYPE__", TI.getPtrDiffType(0), Buf); |
| DefineTypeWidth("__PTRDIFF_WIDTH__", TI.getPtrDiffType(0), TI, Buf); |
| DefineType("__INTPTR_TYPE__", TI.getIntPtrType(), Buf); |
| DefineTypeWidth("__INTPTR_WIDTH__", TI.getIntPtrType(), TI, Buf); |
| DefineType("__SIZE_TYPE__", TI.getSizeType(), Buf); |
| DefineTypeWidth("__SIZE_WIDTH__", TI.getSizeType(), TI, Buf); |
| DefineType("__WCHAR_TYPE__", TI.getWCharType(), Buf); |
| DefineTypeWidth("__WCHAR_WIDTH__", TI.getWCharType(), TI, Buf); |
| DefineType("__WINT_TYPE__", TI.getWIntType(), Buf); |
| DefineTypeWidth("__WINT_WIDTH__", TI.getWIntType(), TI, Buf); |
| DefineTypeWidth("__SIG_ATOMIC_WIDTH__", TI.getSigAtomicType(), TI, Buf); |
| |
| DefineFloatMacros(Buf, "FLT", &TI.getFloatFormat()); |
| DefineFloatMacros(Buf, "DBL", &TI.getDoubleFormat()); |
| DefineFloatMacros(Buf, "LDBL", &TI.getLongDoubleFormat()); |
| |
| // Define a __POINTER_WIDTH__ macro for stdint.h. |
| sprintf(MacroBuf, "__POINTER_WIDTH__=%d", (int)TI.getPointerWidth(0)); |
| DefineBuiltinMacro(Buf, MacroBuf); |
| |
| if (!LangOpts.CharIsSigned) |
| DefineBuiltinMacro(Buf, "__CHAR_UNSIGNED__"); |
| |
| // Define exact-width integer types for stdint.h |
| sprintf(MacroBuf, "__INT%d_TYPE__=char", TI.getCharWidth()); |
| DefineBuiltinMacro(Buf, MacroBuf); |
| |
| if (TI.getShortWidth() > TI.getCharWidth()) |
| DefineExactWidthIntType(TargetInfo::SignedShort, TI, Buf); |
| |
| if (TI.getIntWidth() > TI.getShortWidth()) |
| DefineExactWidthIntType(TargetInfo::SignedInt, TI, Buf); |
| |
| if (TI.getLongWidth() > TI.getIntWidth()) |
| DefineExactWidthIntType(TargetInfo::SignedLong, TI, Buf); |
| |
| if (TI.getLongLongWidth() > TI.getLongWidth()) |
| DefineExactWidthIntType(TargetInfo::SignedLongLong, TI, Buf); |
| |
| // Add __builtin_va_list typedef. |
| { |
| const char *VAList = TI.getVAListDeclaration(); |
| Buf.insert(Buf.end(), VAList, VAList+strlen(VAList)); |
| Buf.push_back('\n'); |
| } |
| |
| if (const char *Prefix = TI.getUserLabelPrefix()) { |
| sprintf(MacroBuf, "__USER_LABEL_PREFIX__=%s", Prefix); |
| DefineBuiltinMacro(Buf, MacroBuf); |
| } |
| |
| // Build configuration options. FIXME: these should be controlled by |
| // command line options or something. |
| DefineBuiltinMacro(Buf, "__FINITE_MATH_ONLY__=0"); |
| |
| if (LangOpts.GNUInline) |
| DefineBuiltinMacro(Buf, "__GNUC_GNU_INLINE__=1"); |
| else |
| DefineBuiltinMacro(Buf, "__GNUC_STDC_INLINE__=1"); |
| |
| if (LangOpts.NoInline) |
| DefineBuiltinMacro(Buf, "__NO_INLINE__=1"); |
| |
| if (unsigned PICLevel = LangOpts.PICLevel) { |
| sprintf(MacroBuf, "__PIC__=%d", PICLevel); |
| DefineBuiltinMacro(Buf, MacroBuf); |
| |
| sprintf(MacroBuf, "__pic__=%d", PICLevel); |
| DefineBuiltinMacro(Buf, MacroBuf); |
| } |
| |
| // Macros to control C99 numerics and <float.h> |
| DefineBuiltinMacro(Buf, "__FLT_EVAL_METHOD__=0"); |
| DefineBuiltinMacro(Buf, "__FLT_RADIX__=2"); |
| sprintf(MacroBuf, "__DECIMAL_DIG__=%d", |
| PickFP(&TI.getLongDoubleFormat(), -1/*FIXME*/, 17, 21, 33, 36)); |
| DefineBuiltinMacro(Buf, MacroBuf); |
| |
| if (LangOpts.getStackProtectorMode() == LangOptions::SSPOn) |
| DefineBuiltinMacro(Buf, "__SSP__=1"); |
| else if (LangOpts.getStackProtectorMode() == LangOptions::SSPReq) |
| DefineBuiltinMacro(Buf, "__SSP_ALL__=2"); |
| |
| // Get other target #defines. |
| TI.getTargetDefines(LangOpts, Buf); |
| } |
| |
| // Initialize the remapping of files to alternative contents, e.g., |
| // those specified through other files. |
| static void InitializeFileRemapping(Diagnostic &Diags, |
| SourceManager &SourceMgr, |
| FileManager &FileMgr, |
| const PreprocessorOptions &InitOpts) { |
| // Remap files in the source manager. |
| for (PreprocessorOptions::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; |
| } |
| |
| // Load the contents of the file we're mapping to. |
| std::string ErrorStr; |
| const llvm::MemoryBuffer *Buffer |
| = llvm::MemoryBuffer::getFile(ToFile->getName(), &ErrorStr); |
| if (!Buffer) { |
| Diags.Report(diag::err_fe_error_opening) |
| << Remap->second << ErrorStr; |
| continue; |
| } |
| |
| // Override the contents of the "from" file with the contents of |
| // the "to" file. |
| SourceMgr.overrideFileContents(FromFile, Buffer); |
| } |
| } |
| |
| /// 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) { |
| std::vector<char> PredefineBuffer; |
| |
| InitializeFileRemapping(PP.getDiagnostics(), PP.getSourceManager(), |
| PP.getFileManager(), InitOpts); |
| |
| const char *LineDirective = "# 1 \"<built-in>\" 3\n"; |
| PredefineBuffer.insert(PredefineBuffer.end(), |
| LineDirective, LineDirective+strlen(LineDirective)); |
| |
| // Install things like __POWERPC__, __GNUC__, etc into the macro table. |
| if (InitOpts.UsePredefines) |
| InitializePredefinedMacros(PP.getTargetInfo(), PP.getLangOptions(), |
| PredefineBuffer); |
| |
| // Add on the predefines from the driver. Wrap in a #line directive to report |
| // that they come from the command line. |
| LineDirective = "# 1 \"<command line>\" 1\n"; |
| PredefineBuffer.insert(PredefineBuffer.end(), |
| LineDirective, LineDirective+strlen(LineDirective)); |
| |
| // 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 |
| UndefineBuiltinMacro(PredefineBuffer, InitOpts.Macros[i].first.c_str()); |
| else |
| DefineBuiltinMacro(PredefineBuffer, InitOpts.Macros[i].first.c_str(), |
| &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(PredefineBuffer, InitOpts.MacroIncludes[i]); |
| |
| // 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(PredefineBuffer, PP, Path); |
| else |
| AddImplicitInclude(PredefineBuffer, Path); |
| } |
| |
| // Exit the command line and go back to <built-in> (2 is LC_LEAVE). |
| LineDirective = "# 1 \"<built-in>\" 2\n"; |
| PredefineBuffer.insert(PredefineBuffer.end(), |
| LineDirective, LineDirective+strlen(LineDirective)); |
| |
| // Null terminate PredefinedBuffer and add it. |
| PredefineBuffer.push_back(0); |
| PP.setPredefines(&PredefineBuffer[0]); |
| |
| // Initialize the header search object. |
| ApplyHeaderSearchOptions(PP.getHeaderSearchInfo(), HSOpts, |
| PP.getLangOptions(), |
| PP.getTargetInfo().getTriple()); |
| } |