1 //===--- InitPreprocessor.cpp - PP initialization code. ---------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file implements the clang::InitializePreprocessor function. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "clang/Frontend/Utils.h" 15 #include "clang/Basic/FileManager.h" 16 #include "clang/Basic/MacroBuilder.h" 17 #include "clang/Basic/SourceManager.h" 18 #include "clang/Basic/TargetInfo.h" 19 #include "clang/Basic/Version.h" 20 #include "clang/Frontend/FrontendDiagnostic.h" 21 #include "clang/Frontend/FrontendOptions.h" 22 #include "clang/Lex/HeaderSearch.h" 23 #include "clang/Lex/PTHManager.h" 24 #include "clang/Lex/Preprocessor.h" 25 #include "clang/Lex/PreprocessorOptions.h" 26 #include "clang/Serialization/ASTReader.h" 27 #include "llvm/ADT/APFloat.h" 28 #include "llvm/Support/FileSystem.h" 29 #include "llvm/Support/MemoryBuffer.h" 30 #include "llvm/Support/Path.h" 31 using namespace clang; 32 33 static bool MacroBodyEndsInBackslash(StringRef MacroBody) { 34 while (!MacroBody.empty() && isWhitespace(MacroBody.back())) 35 MacroBody = MacroBody.drop_back(); 36 return !MacroBody.empty() && MacroBody.back() == '\\'; 37 } 38 39 // Append a #define line to Buf for Macro. Macro should be of the form XXX, 40 // in which case we emit "#define XXX 1" or "XXX=Y z W" in which case we emit 41 // "#define XXX Y z W". To get a #define with no value, use "XXX=". 42 static void DefineBuiltinMacro(MacroBuilder &Builder, StringRef Macro, 43 DiagnosticsEngine &Diags) { 44 std::pair<StringRef, StringRef> MacroPair = Macro.split('='); 45 StringRef MacroName = MacroPair.first; 46 StringRef MacroBody = MacroPair.second; 47 if (MacroName.size() != Macro.size()) { 48 // Per GCC -D semantics, the macro ends at \n if it exists. 49 StringRef::size_type End = MacroBody.find_first_of("\n\r"); 50 if (End != StringRef::npos) 51 Diags.Report(diag::warn_fe_macro_contains_embedded_newline) 52 << MacroName; 53 MacroBody = MacroBody.substr(0, End); 54 // We handle macro bodies which end in a backslash by appending an extra 55 // backslash+newline. This makes sure we don't accidentally treat the 56 // backslash as a line continuation marker. 57 if (MacroBodyEndsInBackslash(MacroBody)) 58 Builder.defineMacro(MacroName, Twine(MacroBody) + "\\\n"); 59 else 60 Builder.defineMacro(MacroName, MacroBody); 61 } else { 62 // Push "macroname 1". 63 Builder.defineMacro(Macro); 64 } 65 } 66 67 /// AddImplicitInclude - Add an implicit \#include of the specified file to the 68 /// predefines buffer. 69 /// As these includes are generated by -include arguments the header search 70 /// logic is going to search relatively to the current working directory. 71 static void AddImplicitInclude(MacroBuilder &Builder, StringRef File) { 72 Builder.append(Twine("#include \"") + File + "\""); 73 } 74 75 static void AddImplicitIncludeMacros(MacroBuilder &Builder, StringRef File) { 76 Builder.append(Twine("#__include_macros \"") + File + "\""); 77 // Marker token to stop the __include_macros fetch loop. 78 Builder.append("##"); // ##? 79 } 80 81 /// AddImplicitIncludePTH - Add an implicit \#include using the original file 82 /// used to generate a PTH cache. 83 static void AddImplicitIncludePTH(MacroBuilder &Builder, Preprocessor &PP, 84 StringRef ImplicitIncludePTH) { 85 PTHManager *P = PP.getPTHManager(); 86 // Null check 'P' in the corner case where it couldn't be created. 87 const char *OriginalFile = P ? P->getOriginalSourceFile() : nullptr; 88 89 if (!OriginalFile) { 90 PP.getDiagnostics().Report(diag::err_fe_pth_file_has_no_source_header) 91 << ImplicitIncludePTH; 92 return; 93 } 94 95 AddImplicitInclude(Builder, OriginalFile); 96 } 97 98 /// \brief Add an implicit \#include using the original file used to generate 99 /// a PCH file. 100 static void AddImplicitIncludePCH(MacroBuilder &Builder, Preprocessor &PP, 101 const PCHContainerReader &PCHContainerRdr, 102 StringRef ImplicitIncludePCH) { 103 std::string OriginalFile = 104 ASTReader::getOriginalSourceFile(ImplicitIncludePCH, PP.getFileManager(), 105 PCHContainerRdr, PP.getDiagnostics()); 106 if (OriginalFile.empty()) 107 return; 108 109 AddImplicitInclude(Builder, OriginalFile); 110 } 111 112 /// PickFP - This is used to pick a value based on the FP semantics of the 113 /// specified FP model. 114 template <typename T> 115 static T PickFP(const llvm::fltSemantics *Sem, T IEEESingleVal, 116 T IEEEDoubleVal, T X87DoubleExtendedVal, T PPCDoubleDoubleVal, 117 T IEEEQuadVal) { 118 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEsingle) 119 return IEEESingleVal; 120 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEdouble) 121 return IEEEDoubleVal; 122 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::x87DoubleExtended) 123 return X87DoubleExtendedVal; 124 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::PPCDoubleDouble) 125 return PPCDoubleDoubleVal; 126 assert(Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEquad); 127 return IEEEQuadVal; 128 } 129 130 static void DefineFloatMacros(MacroBuilder &Builder, StringRef Prefix, 131 const llvm::fltSemantics *Sem, StringRef Ext) { 132 const char *DenormMin, *Epsilon, *Max, *Min; 133 DenormMin = PickFP(Sem, "1.40129846e-45", "4.9406564584124654e-324", 134 "3.64519953188247460253e-4951", 135 "4.94065645841246544176568792868221e-324", 136 "6.47517511943802511092443895822764655e-4966"); 137 int Digits = PickFP(Sem, 6, 15, 18, 31, 33); 138 int DecimalDigits = PickFP(Sem, 9, 17, 21, 33, 36); 139 Epsilon = PickFP(Sem, "1.19209290e-7", "2.2204460492503131e-16", 140 "1.08420217248550443401e-19", 141 "4.94065645841246544176568792868221e-324", 142 "1.92592994438723585305597794258492732e-34"); 143 int MantissaDigits = PickFP(Sem, 24, 53, 64, 106, 113); 144 int Min10Exp = PickFP(Sem, -37, -307, -4931, -291, -4931); 145 int Max10Exp = PickFP(Sem, 38, 308, 4932, 308, 4932); 146 int MinExp = PickFP(Sem, -125, -1021, -16381, -968, -16381); 147 int MaxExp = PickFP(Sem, 128, 1024, 16384, 1024, 16384); 148 Min = PickFP(Sem, "1.17549435e-38", "2.2250738585072014e-308", 149 "3.36210314311209350626e-4932", 150 "2.00416836000897277799610805135016e-292", 151 "3.36210314311209350626267781732175260e-4932"); 152 Max = PickFP(Sem, "3.40282347e+38", "1.7976931348623157e+308", 153 "1.18973149535723176502e+4932", 154 "1.79769313486231580793728971405301e+308", 155 "1.18973149535723176508575932662800702e+4932"); 156 157 SmallString<32> DefPrefix; 158 DefPrefix = "__"; 159 DefPrefix += Prefix; 160 DefPrefix += "_"; 161 162 Builder.defineMacro(DefPrefix + "DENORM_MIN__", Twine(DenormMin)+Ext); 163 Builder.defineMacro(DefPrefix + "HAS_DENORM__"); 164 Builder.defineMacro(DefPrefix + "DIG__", Twine(Digits)); 165 Builder.defineMacro(DefPrefix + "DECIMAL_DIG__", Twine(DecimalDigits)); 166 Builder.defineMacro(DefPrefix + "EPSILON__", Twine(Epsilon)+Ext); 167 Builder.defineMacro(DefPrefix + "HAS_INFINITY__"); 168 Builder.defineMacro(DefPrefix + "HAS_QUIET_NAN__"); 169 Builder.defineMacro(DefPrefix + "MANT_DIG__", Twine(MantissaDigits)); 170 171 Builder.defineMacro(DefPrefix + "MAX_10_EXP__", Twine(Max10Exp)); 172 Builder.defineMacro(DefPrefix + "MAX_EXP__", Twine(MaxExp)); 173 Builder.defineMacro(DefPrefix + "MAX__", Twine(Max)+Ext); 174 175 Builder.defineMacro(DefPrefix + "MIN_10_EXP__","("+Twine(Min10Exp)+")"); 176 Builder.defineMacro(DefPrefix + "MIN_EXP__", "("+Twine(MinExp)+")"); 177 Builder.defineMacro(DefPrefix + "MIN__", Twine(Min)+Ext); 178 } 179 180 181 /// DefineTypeSize - Emit a macro to the predefines buffer that declares a macro 182 /// named MacroName with the max value for a type with width 'TypeWidth' a 183 /// signedness of 'isSigned' and with a value suffix of 'ValSuffix' (e.g. LL). 184 static void DefineTypeSize(const Twine &MacroName, unsigned TypeWidth, 185 StringRef ValSuffix, bool isSigned, 186 MacroBuilder &Builder) { 187 llvm::APInt MaxVal = isSigned ? llvm::APInt::getSignedMaxValue(TypeWidth) 188 : llvm::APInt::getMaxValue(TypeWidth); 189 Builder.defineMacro(MacroName, MaxVal.toString(10, isSigned) + ValSuffix); 190 } 191 192 /// DefineTypeSize - An overloaded helper that uses TargetInfo to determine 193 /// the width, suffix, and signedness of the given type 194 static void DefineTypeSize(const Twine &MacroName, TargetInfo::IntType Ty, 195 const TargetInfo &TI, MacroBuilder &Builder) { 196 DefineTypeSize(MacroName, TI.getTypeWidth(Ty), TI.getTypeConstantSuffix(Ty), 197 TI.isTypeSigned(Ty), Builder); 198 } 199 200 static void DefineFmt(const Twine &Prefix, TargetInfo::IntType Ty, 201 const TargetInfo &TI, MacroBuilder &Builder) { 202 bool IsSigned = TI.isTypeSigned(Ty); 203 StringRef FmtModifier = TI.getTypeFormatModifier(Ty); 204 for (const char *Fmt = IsSigned ? "di" : "ouxX"; *Fmt; ++Fmt) { 205 Builder.defineMacro(Prefix + "_FMT" + Twine(*Fmt) + "__", 206 Twine("\"") + FmtModifier + Twine(*Fmt) + "\""); 207 } 208 } 209 210 static void DefineType(const Twine &MacroName, TargetInfo::IntType Ty, 211 MacroBuilder &Builder) { 212 Builder.defineMacro(MacroName, TargetInfo::getTypeName(Ty)); 213 } 214 215 static void DefineTypeWidth(StringRef MacroName, TargetInfo::IntType Ty, 216 const TargetInfo &TI, MacroBuilder &Builder) { 217 Builder.defineMacro(MacroName, Twine(TI.getTypeWidth(Ty))); 218 } 219 220 static void DefineTypeSizeof(StringRef MacroName, unsigned BitWidth, 221 const TargetInfo &TI, MacroBuilder &Builder) { 222 Builder.defineMacro(MacroName, 223 Twine(BitWidth / TI.getCharWidth())); 224 } 225 226 static void DefineExactWidthIntType(TargetInfo::IntType Ty, 227 const TargetInfo &TI, 228 MacroBuilder &Builder) { 229 int TypeWidth = TI.getTypeWidth(Ty); 230 bool IsSigned = TI.isTypeSigned(Ty); 231 232 // Use the target specified int64 type, when appropriate, so that [u]int64_t 233 // ends up being defined in terms of the correct type. 234 if (TypeWidth == 64) 235 Ty = IsSigned ? TI.getInt64Type() : TI.getUInt64Type(); 236 237 const char *Prefix = IsSigned ? "__INT" : "__UINT"; 238 239 DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder); 240 DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder); 241 242 StringRef ConstSuffix(TI.getTypeConstantSuffix(Ty)); 243 Builder.defineMacro(Prefix + Twine(TypeWidth) + "_C_SUFFIX__", ConstSuffix); 244 } 245 246 static void DefineExactWidthIntTypeSize(TargetInfo::IntType Ty, 247 const TargetInfo &TI, 248 MacroBuilder &Builder) { 249 int TypeWidth = TI.getTypeWidth(Ty); 250 bool IsSigned = TI.isTypeSigned(Ty); 251 252 // Use the target specified int64 type, when appropriate, so that [u]int64_t 253 // ends up being defined in terms of the correct type. 254 if (TypeWidth == 64) 255 Ty = IsSigned ? TI.getInt64Type() : TI.getUInt64Type(); 256 257 const char *Prefix = IsSigned ? "__INT" : "__UINT"; 258 DefineTypeSize(Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder); 259 } 260 261 static void DefineLeastWidthIntType(unsigned TypeWidth, bool IsSigned, 262 const TargetInfo &TI, 263 MacroBuilder &Builder) { 264 TargetInfo::IntType Ty = TI.getLeastIntTypeByWidth(TypeWidth, IsSigned); 265 if (Ty == TargetInfo::NoInt) 266 return; 267 268 const char *Prefix = IsSigned ? "__INT_LEAST" : "__UINT_LEAST"; 269 DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder); 270 DefineTypeSize(Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder); 271 DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder); 272 } 273 274 static void DefineFastIntType(unsigned TypeWidth, bool IsSigned, 275 const TargetInfo &TI, MacroBuilder &Builder) { 276 // stdint.h currently defines the fast int types as equivalent to the least 277 // types. 278 TargetInfo::IntType Ty = TI.getLeastIntTypeByWidth(TypeWidth, IsSigned); 279 if (Ty == TargetInfo::NoInt) 280 return; 281 282 const char *Prefix = IsSigned ? "__INT_FAST" : "__UINT_FAST"; 283 DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder); 284 DefineTypeSize(Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder); 285 286 DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder); 287 } 288 289 290 /// Get the value the ATOMIC_*_LOCK_FREE macro should have for a type with 291 /// the specified properties. 292 static const char *getLockFreeValue(unsigned TypeWidth, unsigned TypeAlign, 293 unsigned InlineWidth) { 294 // Fully-aligned, power-of-2 sizes no larger than the inline 295 // width will be inlined as lock-free operations. 296 if (TypeWidth == TypeAlign && (TypeWidth & (TypeWidth - 1)) == 0 && 297 TypeWidth <= InlineWidth) 298 return "2"; // "always lock free" 299 // We cannot be certain what operations the lib calls might be 300 // able to implement as lock-free on future processors. 301 return "1"; // "sometimes lock free" 302 } 303 304 /// \brief Add definitions required for a smooth interaction between 305 /// Objective-C++ automated reference counting and libstdc++ (4.2). 306 static void AddObjCXXARCLibstdcxxDefines(const LangOptions &LangOpts, 307 MacroBuilder &Builder) { 308 Builder.defineMacro("_GLIBCXX_PREDEFINED_OBJC_ARC_IS_SCALAR"); 309 310 std::string Result; 311 { 312 // Provide specializations for the __is_scalar type trait so that 313 // lifetime-qualified objects are not considered "scalar" types, which 314 // libstdc++ uses as an indicator of the presence of trivial copy, assign, 315 // default-construct, and destruct semantics (none of which hold for 316 // lifetime-qualified objects in ARC). 317 llvm::raw_string_ostream Out(Result); 318 319 Out << "namespace std {\n" 320 << "\n" 321 << "struct __true_type;\n" 322 << "struct __false_type;\n" 323 << "\n"; 324 325 Out << "template<typename _Tp> struct __is_scalar;\n" 326 << "\n"; 327 328 if (LangOpts.ObjCAutoRefCount) { 329 Out << "template<typename _Tp>\n" 330 << "struct __is_scalar<__attribute__((objc_ownership(strong))) _Tp> {\n" 331 << " enum { __value = 0 };\n" 332 << " typedef __false_type __type;\n" 333 << "};\n" 334 << "\n"; 335 } 336 337 if (LangOpts.ObjCWeak) { 338 Out << "template<typename _Tp>\n" 339 << "struct __is_scalar<__attribute__((objc_ownership(weak))) _Tp> {\n" 340 << " enum { __value = 0 };\n" 341 << " typedef __false_type __type;\n" 342 << "};\n" 343 << "\n"; 344 } 345 346 if (LangOpts.ObjCAutoRefCount) { 347 Out << "template<typename _Tp>\n" 348 << "struct __is_scalar<__attribute__((objc_ownership(autoreleasing)))" 349 << " _Tp> {\n" 350 << " enum { __value = 0 };\n" 351 << " typedef __false_type __type;\n" 352 << "};\n" 353 << "\n"; 354 } 355 356 Out << "}\n"; 357 } 358 Builder.append(Result); 359 } 360 361 static void InitializeStandardPredefinedMacros(const TargetInfo &TI, 362 const LangOptions &LangOpts, 363 const FrontendOptions &FEOpts, 364 MacroBuilder &Builder) { 365 if (!LangOpts.MSVCCompat && !LangOpts.TraditionalCPP) 366 Builder.defineMacro("__STDC__"); 367 if (LangOpts.Freestanding) 368 Builder.defineMacro("__STDC_HOSTED__", "0"); 369 else 370 Builder.defineMacro("__STDC_HOSTED__"); 371 372 if (!LangOpts.CPlusPlus) { 373 if (LangOpts.C11) 374 Builder.defineMacro("__STDC_VERSION__", "201112L"); 375 else if (LangOpts.C99) 376 Builder.defineMacro("__STDC_VERSION__", "199901L"); 377 else if (!LangOpts.GNUMode && LangOpts.Digraphs) 378 Builder.defineMacro("__STDC_VERSION__", "199409L"); 379 } else { 380 // FIXME: Use correct value for C++17. 381 if (LangOpts.CPlusPlus1z) 382 Builder.defineMacro("__cplusplus", "201406L"); 383 // C++1y [cpp.predefined]p1: 384 // The name __cplusplus is defined to the value 201402L when compiling a 385 // C++ translation unit. 386 else if (LangOpts.CPlusPlus14) 387 Builder.defineMacro("__cplusplus", "201402L"); 388 // C++11 [cpp.predefined]p1: 389 // The name __cplusplus is defined to the value 201103L when compiling a 390 // C++ translation unit. 391 else if (LangOpts.CPlusPlus11) 392 Builder.defineMacro("__cplusplus", "201103L"); 393 // C++03 [cpp.predefined]p1: 394 // The name __cplusplus is defined to the value 199711L when compiling a 395 // C++ translation unit. 396 else 397 Builder.defineMacro("__cplusplus", "199711L"); 398 } 399 400 // In C11 these are environment macros. In C++11 they are only defined 401 // as part of <cuchar>. To prevent breakage when mixing C and C++ 402 // code, define these macros unconditionally. We can define them 403 // unconditionally, as Clang always uses UTF-16 and UTF-32 for 16-bit 404 // and 32-bit character literals. 405 Builder.defineMacro("__STDC_UTF_16__", "1"); 406 Builder.defineMacro("__STDC_UTF_32__", "1"); 407 408 if (LangOpts.ObjC1) 409 Builder.defineMacro("__OBJC__"); 410 411 // Not "standard" per se, but available even with the -undef flag. 412 if (LangOpts.AsmPreprocessor) 413 Builder.defineMacro("__ASSEMBLER__"); 414 if (LangOpts.CUDA) 415 Builder.defineMacro("__CUDA__"); 416 } 417 418 /// Initialize the predefined C++ language feature test macros defined in 419 /// ISO/IEC JTC1/SC22/WG21 (C++) SD-6: "SG10 Feature Test Recommendations". 420 static void InitializeCPlusPlusFeatureTestMacros(const LangOptions &LangOpts, 421 MacroBuilder &Builder) { 422 // C++98 features. 423 if (LangOpts.RTTI) 424 Builder.defineMacro("__cpp_rtti", "199711"); 425 if (LangOpts.CXXExceptions) 426 Builder.defineMacro("__cpp_exceptions", "199711"); 427 428 // C++11 features. 429 if (LangOpts.CPlusPlus11) { 430 Builder.defineMacro("__cpp_unicode_characters", "200704"); 431 Builder.defineMacro("__cpp_raw_strings", "200710"); 432 Builder.defineMacro("__cpp_unicode_literals", "200710"); 433 Builder.defineMacro("__cpp_user_defined_literals", "200809"); 434 Builder.defineMacro("__cpp_lambdas", "200907"); 435 Builder.defineMacro("__cpp_constexpr", 436 LangOpts.CPlusPlus14 ? "201304" : "200704"); 437 Builder.defineMacro("__cpp_range_based_for", "200907"); 438 Builder.defineMacro("__cpp_static_assert", "200410"); 439 Builder.defineMacro("__cpp_decltype", "200707"); 440 Builder.defineMacro("__cpp_attributes", "200809"); 441 Builder.defineMacro("__cpp_rvalue_references", "200610"); 442 Builder.defineMacro("__cpp_variadic_templates", "200704"); 443 Builder.defineMacro("__cpp_initializer_lists", "200806"); 444 Builder.defineMacro("__cpp_delegating_constructors", "200604"); 445 Builder.defineMacro("__cpp_nsdmi", "200809"); 446 Builder.defineMacro("__cpp_inheriting_constructors", "200802"); 447 Builder.defineMacro("__cpp_ref_qualifiers", "200710"); 448 Builder.defineMacro("__cpp_alias_templates", "200704"); 449 } 450 451 // C++14 features. 452 if (LangOpts.CPlusPlus14) { 453 Builder.defineMacro("__cpp_binary_literals", "201304"); 454 Builder.defineMacro("__cpp_digit_separators", "201309"); 455 Builder.defineMacro("__cpp_init_captures", "201304"); 456 Builder.defineMacro("__cpp_generic_lambdas", "201304"); 457 Builder.defineMacro("__cpp_decltype_auto", "201304"); 458 Builder.defineMacro("__cpp_return_type_deduction", "201304"); 459 Builder.defineMacro("__cpp_aggregate_nsdmi", "201304"); 460 Builder.defineMacro("__cpp_variable_templates", "201304"); 461 } 462 if (LangOpts.SizedDeallocation) 463 Builder.defineMacro("__cpp_sized_deallocation", "201309"); 464 if (LangOpts.ConceptsTS) 465 Builder.defineMacro("__cpp_experimental_concepts", "1"); 466 if (LangOpts.Coroutines) 467 Builder.defineMacro("__cpp_coroutines", "1"); 468 } 469 470 static void InitializePredefinedMacros(const TargetInfo &TI, 471 const LangOptions &LangOpts, 472 const FrontendOptions &FEOpts, 473 MacroBuilder &Builder) { 474 // Compiler version introspection macros. 475 Builder.defineMacro("__llvm__"); // LLVM Backend 476 Builder.defineMacro("__clang__"); // Clang Frontend 477 #define TOSTR2(X) #X 478 #define TOSTR(X) TOSTR2(X) 479 Builder.defineMacro("__clang_major__", TOSTR(CLANG_VERSION_MAJOR)); 480 Builder.defineMacro("__clang_minor__", TOSTR(CLANG_VERSION_MINOR)); 481 #ifdef CLANG_VERSION_PATCHLEVEL 482 Builder.defineMacro("__clang_patchlevel__", TOSTR(CLANG_VERSION_PATCHLEVEL)); 483 #else 484 Builder.defineMacro("__clang_patchlevel__", "0"); 485 #endif 486 Builder.defineMacro("__clang_version__", 487 "\"" CLANG_VERSION_STRING " " 488 + getClangFullRepositoryVersion() + "\""); 489 #undef TOSTR 490 #undef TOSTR2 491 if (!LangOpts.MSVCCompat) { 492 // Currently claim to be compatible with GCC 4.2.1-5621, but only if we're 493 // not compiling for MSVC compatibility 494 Builder.defineMacro("__GNUC_MINOR__", "2"); 495 Builder.defineMacro("__GNUC_PATCHLEVEL__", "1"); 496 Builder.defineMacro("__GNUC__", "4"); 497 Builder.defineMacro("__GXX_ABI_VERSION", "1002"); 498 } 499 500 // Define macros for the C11 / C++11 memory orderings 501 Builder.defineMacro("__ATOMIC_RELAXED", "0"); 502 Builder.defineMacro("__ATOMIC_CONSUME", "1"); 503 Builder.defineMacro("__ATOMIC_ACQUIRE", "2"); 504 Builder.defineMacro("__ATOMIC_RELEASE", "3"); 505 Builder.defineMacro("__ATOMIC_ACQ_REL", "4"); 506 Builder.defineMacro("__ATOMIC_SEQ_CST", "5"); 507 508 // Support for #pragma redefine_extname (Sun compatibility) 509 Builder.defineMacro("__PRAGMA_REDEFINE_EXTNAME", "1"); 510 511 // As sad as it is, enough software depends on the __VERSION__ for version 512 // checks that it is necessary to report 4.2.1 (the base GCC version we claim 513 // compatibility with) first. 514 Builder.defineMacro("__VERSION__", "\"4.2.1 Compatible " + 515 Twine(getClangFullCPPVersion()) + "\""); 516 517 // Initialize language-specific preprocessor defines. 518 519 // Standard conforming mode? 520 if (!LangOpts.GNUMode && !LangOpts.MSVCCompat) 521 Builder.defineMacro("__STRICT_ANSI__"); 522 523 if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus11) 524 Builder.defineMacro("__GXX_EXPERIMENTAL_CXX0X__"); 525 526 if (LangOpts.ObjC1) { 527 if (LangOpts.ObjCRuntime.isNonFragile()) { 528 Builder.defineMacro("__OBJC2__"); 529 530 if (LangOpts.ObjCExceptions) 531 Builder.defineMacro("OBJC_ZEROCOST_EXCEPTIONS"); 532 } 533 534 if (LangOpts.getGC() != LangOptions::NonGC) 535 Builder.defineMacro("__OBJC_GC__"); 536 537 if (LangOpts.ObjCRuntime.isNeXTFamily()) 538 Builder.defineMacro("__NEXT_RUNTIME__"); 539 540 if (LangOpts.ObjCRuntime.getKind() == ObjCRuntime::ObjFW) { 541 VersionTuple tuple = LangOpts.ObjCRuntime.getVersion(); 542 543 unsigned minor = 0; 544 if (tuple.getMinor().hasValue()) 545 minor = tuple.getMinor().getValue(); 546 547 unsigned subminor = 0; 548 if (tuple.getSubminor().hasValue()) 549 subminor = tuple.getSubminor().getValue(); 550 551 Builder.defineMacro("__OBJFW_RUNTIME_ABI__", 552 Twine(tuple.getMajor() * 10000 + minor * 100 + 553 subminor)); 554 } 555 556 Builder.defineMacro("IBOutlet", "__attribute__((iboutlet))"); 557 Builder.defineMacro("IBOutletCollection(ClassName)", 558 "__attribute__((iboutletcollection(ClassName)))"); 559 Builder.defineMacro("IBAction", "void)__attribute__((ibaction)"); 560 Builder.defineMacro("IBInspectable", ""); 561 Builder.defineMacro("IB_DESIGNABLE", ""); 562 } 563 564 if (LangOpts.CPlusPlus) 565 InitializeCPlusPlusFeatureTestMacros(LangOpts, Builder); 566 567 // darwin_constant_cfstrings controls this. This is also dependent 568 // on other things like the runtime I believe. This is set even for C code. 569 if (!LangOpts.NoConstantCFStrings) 570 Builder.defineMacro("__CONSTANT_CFSTRINGS__"); 571 572 if (LangOpts.ObjC2) 573 Builder.defineMacro("OBJC_NEW_PROPERTIES"); 574 575 if (LangOpts.PascalStrings) 576 Builder.defineMacro("__PASCAL_STRINGS__"); 577 578 if (LangOpts.Blocks) { 579 Builder.defineMacro("__block", "__attribute__((__blocks__(byref)))"); 580 Builder.defineMacro("__BLOCKS__"); 581 } 582 583 if (!LangOpts.MSVCCompat && LangOpts.Exceptions) 584 Builder.defineMacro("__EXCEPTIONS"); 585 if (!LangOpts.MSVCCompat && LangOpts.RTTI) 586 Builder.defineMacro("__GXX_RTTI"); 587 if (LangOpts.SjLjExceptions) 588 Builder.defineMacro("__USING_SJLJ_EXCEPTIONS__"); 589 590 if (LangOpts.Deprecated) 591 Builder.defineMacro("__DEPRECATED"); 592 593 if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus) { 594 Builder.defineMacro("__GNUG__", "4"); 595 Builder.defineMacro("__GXX_WEAK__"); 596 Builder.defineMacro("__private_extern__", "extern"); 597 } 598 599 if (LangOpts.MicrosoftExt) { 600 if (LangOpts.WChar) { 601 // wchar_t supported as a keyword. 602 Builder.defineMacro("_WCHAR_T_DEFINED"); 603 Builder.defineMacro("_NATIVE_WCHAR_T_DEFINED"); 604 } 605 } 606 607 if (LangOpts.Optimize) 608 Builder.defineMacro("__OPTIMIZE__"); 609 if (LangOpts.OptimizeSize) 610 Builder.defineMacro("__OPTIMIZE_SIZE__"); 611 612 if (LangOpts.FastMath) 613 Builder.defineMacro("__FAST_MATH__"); 614 615 // Initialize target-specific preprocessor defines. 616 617 // __BYTE_ORDER__ was added in GCC 4.6. It's analogous 618 // to the macro __BYTE_ORDER (no trailing underscores) 619 // from glibc's <endian.h> header. 620 // We don't support the PDP-11 as a target, but include 621 // the define so it can still be compared against. 622 Builder.defineMacro("__ORDER_LITTLE_ENDIAN__", "1234"); 623 Builder.defineMacro("__ORDER_BIG_ENDIAN__", "4321"); 624 Builder.defineMacro("__ORDER_PDP_ENDIAN__", "3412"); 625 if (TI.isBigEndian()) { 626 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_BIG_ENDIAN__"); 627 Builder.defineMacro("__BIG_ENDIAN__"); 628 } else { 629 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_LITTLE_ENDIAN__"); 630 Builder.defineMacro("__LITTLE_ENDIAN__"); 631 } 632 633 if (TI.getPointerWidth(0) == 64 && TI.getLongWidth() == 64 634 && TI.getIntWidth() == 32) { 635 Builder.defineMacro("_LP64"); 636 Builder.defineMacro("__LP64__"); 637 } 638 639 if (TI.getPointerWidth(0) == 32 && TI.getLongWidth() == 32 640 && TI.getIntWidth() == 32) { 641 Builder.defineMacro("_ILP32"); 642 Builder.defineMacro("__ILP32__"); 643 } 644 645 // Define type sizing macros based on the target properties. 646 assert(TI.getCharWidth() == 8 && "Only support 8-bit char so far"); 647 Builder.defineMacro("__CHAR_BIT__", "8"); 648 649 DefineTypeSize("__SCHAR_MAX__", TargetInfo::SignedChar, TI, Builder); 650 DefineTypeSize("__SHRT_MAX__", TargetInfo::SignedShort, TI, Builder); 651 DefineTypeSize("__INT_MAX__", TargetInfo::SignedInt, TI, Builder); 652 DefineTypeSize("__LONG_MAX__", TargetInfo::SignedLong, TI, Builder); 653 DefineTypeSize("__LONG_LONG_MAX__", TargetInfo::SignedLongLong, TI, Builder); 654 DefineTypeSize("__WCHAR_MAX__", TI.getWCharType(), TI, Builder); 655 DefineTypeSize("__INTMAX_MAX__", TI.getIntMaxType(), TI, Builder); 656 DefineTypeSize("__SIZE_MAX__", TI.getSizeType(), TI, Builder); 657 658 DefineTypeSize("__UINTMAX_MAX__", TI.getUIntMaxType(), TI, Builder); 659 DefineTypeSize("__PTRDIFF_MAX__", TI.getPtrDiffType(0), TI, Builder); 660 DefineTypeSize("__INTPTR_MAX__", TI.getIntPtrType(), TI, Builder); 661 DefineTypeSize("__UINTPTR_MAX__", TI.getUIntPtrType(), TI, Builder); 662 663 DefineTypeSizeof("__SIZEOF_DOUBLE__", TI.getDoubleWidth(), TI, Builder); 664 DefineTypeSizeof("__SIZEOF_FLOAT__", TI.getFloatWidth(), TI, Builder); 665 DefineTypeSizeof("__SIZEOF_INT__", TI.getIntWidth(), TI, Builder); 666 DefineTypeSizeof("__SIZEOF_LONG__", TI.getLongWidth(), TI, Builder); 667 DefineTypeSizeof("__SIZEOF_LONG_DOUBLE__",TI.getLongDoubleWidth(),TI,Builder); 668 DefineTypeSizeof("__SIZEOF_LONG_LONG__", TI.getLongLongWidth(), TI, Builder); 669 DefineTypeSizeof("__SIZEOF_POINTER__", TI.getPointerWidth(0), TI, Builder); 670 DefineTypeSizeof("__SIZEOF_SHORT__", TI.getShortWidth(), TI, Builder); 671 DefineTypeSizeof("__SIZEOF_PTRDIFF_T__", 672 TI.getTypeWidth(TI.getPtrDiffType(0)), TI, Builder); 673 DefineTypeSizeof("__SIZEOF_SIZE_T__", 674 TI.getTypeWidth(TI.getSizeType()), TI, Builder); 675 DefineTypeSizeof("__SIZEOF_WCHAR_T__", 676 TI.getTypeWidth(TI.getWCharType()), TI, Builder); 677 DefineTypeSizeof("__SIZEOF_WINT_T__", 678 TI.getTypeWidth(TI.getWIntType()), TI, Builder); 679 if (TI.hasInt128Type()) 680 DefineTypeSizeof("__SIZEOF_INT128__", 128, TI, Builder); 681 682 DefineType("__INTMAX_TYPE__", TI.getIntMaxType(), Builder); 683 DefineFmt("__INTMAX", TI.getIntMaxType(), TI, Builder); 684 Builder.defineMacro("__INTMAX_C_SUFFIX__", 685 TI.getTypeConstantSuffix(TI.getIntMaxType())); 686 DefineType("__UINTMAX_TYPE__", TI.getUIntMaxType(), Builder); 687 DefineFmt("__UINTMAX", TI.getUIntMaxType(), TI, Builder); 688 Builder.defineMacro("__UINTMAX_C_SUFFIX__", 689 TI.getTypeConstantSuffix(TI.getUIntMaxType())); 690 DefineTypeWidth("__INTMAX_WIDTH__", TI.getIntMaxType(), TI, Builder); 691 DefineType("__PTRDIFF_TYPE__", TI.getPtrDiffType(0), Builder); 692 DefineFmt("__PTRDIFF", TI.getPtrDiffType(0), TI, Builder); 693 DefineTypeWidth("__PTRDIFF_WIDTH__", TI.getPtrDiffType(0), TI, Builder); 694 DefineType("__INTPTR_TYPE__", TI.getIntPtrType(), Builder); 695 DefineFmt("__INTPTR", TI.getIntPtrType(), TI, Builder); 696 DefineTypeWidth("__INTPTR_WIDTH__", TI.getIntPtrType(), TI, Builder); 697 DefineType("__SIZE_TYPE__", TI.getSizeType(), Builder); 698 DefineFmt("__SIZE", TI.getSizeType(), TI, Builder); 699 DefineTypeWidth("__SIZE_WIDTH__", TI.getSizeType(), TI, Builder); 700 DefineType("__WCHAR_TYPE__", TI.getWCharType(), Builder); 701 DefineTypeWidth("__WCHAR_WIDTH__", TI.getWCharType(), TI, Builder); 702 DefineType("__WINT_TYPE__", TI.getWIntType(), Builder); 703 DefineTypeWidth("__WINT_WIDTH__", TI.getWIntType(), TI, Builder); 704 DefineTypeWidth("__SIG_ATOMIC_WIDTH__", TI.getSigAtomicType(), TI, Builder); 705 DefineTypeSize("__SIG_ATOMIC_MAX__", TI.getSigAtomicType(), TI, Builder); 706 DefineType("__CHAR16_TYPE__", TI.getChar16Type(), Builder); 707 DefineType("__CHAR32_TYPE__", TI.getChar32Type(), Builder); 708 709 DefineTypeWidth("__UINTMAX_WIDTH__", TI.getUIntMaxType(), TI, Builder); 710 DefineType("__UINTPTR_TYPE__", TI.getUIntPtrType(), Builder); 711 DefineFmt("__UINTPTR", TI.getUIntPtrType(), TI, Builder); 712 DefineTypeWidth("__UINTPTR_WIDTH__", TI.getUIntPtrType(), TI, Builder); 713 714 DefineFloatMacros(Builder, "FLT", &TI.getFloatFormat(), "F"); 715 DefineFloatMacros(Builder, "DBL", &TI.getDoubleFormat(), ""); 716 DefineFloatMacros(Builder, "LDBL", &TI.getLongDoubleFormat(), "L"); 717 718 // Define a __POINTER_WIDTH__ macro for stdint.h. 719 Builder.defineMacro("__POINTER_WIDTH__", 720 Twine((int)TI.getPointerWidth(0))); 721 722 // Define __BIGGEST_ALIGNMENT__ to be compatible with gcc. 723 Builder.defineMacro("__BIGGEST_ALIGNMENT__", 724 Twine(TI.getSuitableAlign() / TI.getCharWidth()) ); 725 726 if (!LangOpts.CharIsSigned) 727 Builder.defineMacro("__CHAR_UNSIGNED__"); 728 729 if (!TargetInfo::isTypeSigned(TI.getWCharType())) 730 Builder.defineMacro("__WCHAR_UNSIGNED__"); 731 732 if (!TargetInfo::isTypeSigned(TI.getWIntType())) 733 Builder.defineMacro("__WINT_UNSIGNED__"); 734 735 // Define exact-width integer types for stdint.h 736 DefineExactWidthIntType(TargetInfo::SignedChar, TI, Builder); 737 738 if (TI.getShortWidth() > TI.getCharWidth()) 739 DefineExactWidthIntType(TargetInfo::SignedShort, TI, Builder); 740 741 if (TI.getIntWidth() > TI.getShortWidth()) 742 DefineExactWidthIntType(TargetInfo::SignedInt, TI, Builder); 743 744 if (TI.getLongWidth() > TI.getIntWidth()) 745 DefineExactWidthIntType(TargetInfo::SignedLong, TI, Builder); 746 747 if (TI.getLongLongWidth() > TI.getLongWidth()) 748 DefineExactWidthIntType(TargetInfo::SignedLongLong, TI, Builder); 749 750 DefineExactWidthIntType(TargetInfo::UnsignedChar, TI, Builder); 751 DefineExactWidthIntTypeSize(TargetInfo::UnsignedChar, TI, Builder); 752 DefineExactWidthIntTypeSize(TargetInfo::SignedChar, TI, Builder); 753 754 if (TI.getShortWidth() > TI.getCharWidth()) { 755 DefineExactWidthIntType(TargetInfo::UnsignedShort, TI, Builder); 756 DefineExactWidthIntTypeSize(TargetInfo::UnsignedShort, TI, Builder); 757 DefineExactWidthIntTypeSize(TargetInfo::SignedShort, TI, Builder); 758 } 759 760 if (TI.getIntWidth() > TI.getShortWidth()) { 761 DefineExactWidthIntType(TargetInfo::UnsignedInt, TI, Builder); 762 DefineExactWidthIntTypeSize(TargetInfo::UnsignedInt, TI, Builder); 763 DefineExactWidthIntTypeSize(TargetInfo::SignedInt, TI, Builder); 764 } 765 766 if (TI.getLongWidth() > TI.getIntWidth()) { 767 DefineExactWidthIntType(TargetInfo::UnsignedLong, TI, Builder); 768 DefineExactWidthIntTypeSize(TargetInfo::UnsignedLong, TI, Builder); 769 DefineExactWidthIntTypeSize(TargetInfo::SignedLong, TI, Builder); 770 } 771 772 if (TI.getLongLongWidth() > TI.getLongWidth()) { 773 DefineExactWidthIntType(TargetInfo::UnsignedLongLong, TI, Builder); 774 DefineExactWidthIntTypeSize(TargetInfo::UnsignedLongLong, TI, Builder); 775 DefineExactWidthIntTypeSize(TargetInfo::SignedLongLong, TI, Builder); 776 } 777 778 DefineLeastWidthIntType(8, true, TI, Builder); 779 DefineLeastWidthIntType(8, false, TI, Builder); 780 DefineLeastWidthIntType(16, true, TI, Builder); 781 DefineLeastWidthIntType(16, false, TI, Builder); 782 DefineLeastWidthIntType(32, true, TI, Builder); 783 DefineLeastWidthIntType(32, false, TI, Builder); 784 DefineLeastWidthIntType(64, true, TI, Builder); 785 DefineLeastWidthIntType(64, false, TI, Builder); 786 787 DefineFastIntType(8, true, TI, Builder); 788 DefineFastIntType(8, false, TI, Builder); 789 DefineFastIntType(16, true, TI, Builder); 790 DefineFastIntType(16, false, TI, Builder); 791 DefineFastIntType(32, true, TI, Builder); 792 DefineFastIntType(32, false, TI, Builder); 793 DefineFastIntType(64, true, TI, Builder); 794 DefineFastIntType(64, false, TI, Builder); 795 796 if (const char *Prefix = TI.getUserLabelPrefix()) 797 Builder.defineMacro("__USER_LABEL_PREFIX__", Prefix); 798 799 if (LangOpts.FastMath || LangOpts.FiniteMathOnly) 800 Builder.defineMacro("__FINITE_MATH_ONLY__", "1"); 801 else 802 Builder.defineMacro("__FINITE_MATH_ONLY__", "0"); 803 804 if (!LangOpts.MSVCCompat) { 805 if (LangOpts.GNUInline || LangOpts.CPlusPlus) 806 Builder.defineMacro("__GNUC_GNU_INLINE__"); 807 else 808 Builder.defineMacro("__GNUC_STDC_INLINE__"); 809 810 // The value written by __atomic_test_and_set. 811 // FIXME: This is target-dependent. 812 Builder.defineMacro("__GCC_ATOMIC_TEST_AND_SET_TRUEVAL", "1"); 813 814 // Used by libstdc++ to implement ATOMIC_<foo>_LOCK_FREE. 815 unsigned InlineWidthBits = TI.getMaxAtomicInlineWidth(); 816 #define DEFINE_LOCK_FREE_MACRO(TYPE, Type) \ 817 Builder.defineMacro("__GCC_ATOMIC_" #TYPE "_LOCK_FREE", \ 818 getLockFreeValue(TI.get##Type##Width(), \ 819 TI.get##Type##Align(), \ 820 InlineWidthBits)); 821 DEFINE_LOCK_FREE_MACRO(BOOL, Bool); 822 DEFINE_LOCK_FREE_MACRO(CHAR, Char); 823 DEFINE_LOCK_FREE_MACRO(CHAR16_T, Char16); 824 DEFINE_LOCK_FREE_MACRO(CHAR32_T, Char32); 825 DEFINE_LOCK_FREE_MACRO(WCHAR_T, WChar); 826 DEFINE_LOCK_FREE_MACRO(SHORT, Short); 827 DEFINE_LOCK_FREE_MACRO(INT, Int); 828 DEFINE_LOCK_FREE_MACRO(LONG, Long); 829 DEFINE_LOCK_FREE_MACRO(LLONG, LongLong); 830 Builder.defineMacro("__GCC_ATOMIC_POINTER_LOCK_FREE", 831 getLockFreeValue(TI.getPointerWidth(0), 832 TI.getPointerAlign(0), 833 InlineWidthBits)); 834 #undef DEFINE_LOCK_FREE_MACRO 835 } 836 837 if (LangOpts.NoInlineDefine) 838 Builder.defineMacro("__NO_INLINE__"); 839 840 if (unsigned PICLevel = LangOpts.PICLevel) { 841 Builder.defineMacro("__PIC__", Twine(PICLevel)); 842 Builder.defineMacro("__pic__", Twine(PICLevel)); 843 } 844 if (unsigned PIELevel = LangOpts.PIELevel) { 845 Builder.defineMacro("__PIE__", Twine(PIELevel)); 846 Builder.defineMacro("__pie__", Twine(PIELevel)); 847 } 848 849 // Macros to control C99 numerics and <float.h> 850 Builder.defineMacro("__FLT_EVAL_METHOD__", Twine(TI.getFloatEvalMethod())); 851 Builder.defineMacro("__FLT_RADIX__", "2"); 852 Builder.defineMacro("__DECIMAL_DIG__", "__LDBL_DECIMAL_DIG__"); 853 854 if (LangOpts.getStackProtector() == LangOptions::SSPOn) 855 Builder.defineMacro("__SSP__"); 856 else if (LangOpts.getStackProtector() == LangOptions::SSPStrong) 857 Builder.defineMacro("__SSP_STRONG__", "2"); 858 else if (LangOpts.getStackProtector() == LangOptions::SSPReq) 859 Builder.defineMacro("__SSP_ALL__", "3"); 860 861 // Define a macro that exists only when using the static analyzer. 862 if (FEOpts.ProgramAction == frontend::RunAnalysis) 863 Builder.defineMacro("__clang_analyzer__"); 864 865 if (LangOpts.FastRelaxedMath) 866 Builder.defineMacro("__FAST_RELAXED_MATH__"); 867 868 if (FEOpts.ProgramAction == frontend::RewriteObjC || 869 LangOpts.getGC() != LangOptions::NonGC) { 870 Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))"); 871 Builder.defineMacro("__strong", "__attribute__((objc_gc(strong)))"); 872 Builder.defineMacro("__autoreleasing", ""); 873 Builder.defineMacro("__unsafe_unretained", ""); 874 } else if (LangOpts.ObjC1) { 875 Builder.defineMacro("__weak", "__attribute__((objc_ownership(weak)))"); 876 Builder.defineMacro("__strong", "__attribute__((objc_ownership(strong)))"); 877 Builder.defineMacro("__autoreleasing", 878 "__attribute__((objc_ownership(autoreleasing)))"); 879 Builder.defineMacro("__unsafe_unretained", 880 "__attribute__((objc_ownership(none)))"); 881 } 882 883 // On Darwin, there are __double_underscored variants of the type 884 // nullability qualifiers. 885 if (TI.getTriple().isOSDarwin()) { 886 Builder.defineMacro("__nonnull", "_Nonnull"); 887 Builder.defineMacro("__null_unspecified", "_Null_unspecified"); 888 Builder.defineMacro("__nullable", "_Nullable"); 889 } 890 891 // OpenMP definition 892 if (LangOpts.OpenMP) { 893 // OpenMP 2.2: 894 // In implementations that support a preprocessor, the _OPENMP 895 // macro name is defined to have the decimal value yyyymm where 896 // yyyy and mm are the year and the month designations of the 897 // version of the OpenMP API that the implementation support. 898 Builder.defineMacro("_OPENMP", "201307"); 899 } 900 901 // CUDA device path compilaton 902 if (LangOpts.CUDAIsDevice) { 903 // The CUDA_ARCH value is set for the GPU target specified in the NVPTX 904 // backend's target defines. 905 Builder.defineMacro("__CUDA_ARCH__"); 906 } 907 908 // Get other target #defines. 909 TI.getTargetDefines(LangOpts, Builder); 910 } 911 912 /// InitializePreprocessor - Initialize the preprocessor getting it and the 913 /// environment ready to process a single file. This returns true on error. 914 /// 915 void clang::InitializePreprocessor( 916 Preprocessor &PP, const PreprocessorOptions &InitOpts, 917 const PCHContainerReader &PCHContainerRdr, 918 const FrontendOptions &FEOpts) { 919 const LangOptions &LangOpts = PP.getLangOpts(); 920 std::string PredefineBuffer; 921 PredefineBuffer.reserve(4080); 922 llvm::raw_string_ostream Predefines(PredefineBuffer); 923 MacroBuilder Builder(Predefines); 924 925 // Emit line markers for various builtin sections of the file. We don't do 926 // this in asm preprocessor mode, because "# 4" is not a line marker directive 927 // in this mode. 928 if (!PP.getLangOpts().AsmPreprocessor) 929 Builder.append("# 1 \"<built-in>\" 3"); 930 931 // Install things like __POWERPC__, __GNUC__, etc into the macro table. 932 if (InitOpts.UsePredefines) { 933 if (LangOpts.CUDA && PP.getAuxTargetInfo()) 934 InitializePredefinedMacros(*PP.getAuxTargetInfo(), LangOpts, FEOpts, 935 Builder); 936 937 InitializePredefinedMacros(PP.getTargetInfo(), LangOpts, FEOpts, Builder); 938 939 // Install definitions to make Objective-C++ ARC work well with various 940 // C++ Standard Library implementations. 941 if (LangOpts.ObjC1 && LangOpts.CPlusPlus && 942 (LangOpts.ObjCAutoRefCount || LangOpts.ObjCWeak)) { 943 switch (InitOpts.ObjCXXARCStandardLibrary) { 944 case ARCXX_nolib: 945 case ARCXX_libcxx: 946 break; 947 948 case ARCXX_libstdcxx: 949 AddObjCXXARCLibstdcxxDefines(LangOpts, Builder); 950 break; 951 } 952 } 953 } 954 955 // Even with predefines off, some macros are still predefined. 956 // These should all be defined in the preprocessor according to the 957 // current language configuration. 958 InitializeStandardPredefinedMacros(PP.getTargetInfo(), PP.getLangOpts(), 959 FEOpts, Builder); 960 961 // Add on the predefines from the driver. Wrap in a #line directive to report 962 // that they come from the command line. 963 if (!PP.getLangOpts().AsmPreprocessor) 964 Builder.append("# 1 \"<command line>\" 1"); 965 966 // Process #define's and #undef's in the order they are given. 967 for (unsigned i = 0, e = InitOpts.Macros.size(); i != e; ++i) { 968 if (InitOpts.Macros[i].second) // isUndef 969 Builder.undefineMacro(InitOpts.Macros[i].first); 970 else 971 DefineBuiltinMacro(Builder, InitOpts.Macros[i].first, 972 PP.getDiagnostics()); 973 } 974 975 // If -imacros are specified, include them now. These are processed before 976 // any -include directives. 977 for (unsigned i = 0, e = InitOpts.MacroIncludes.size(); i != e; ++i) 978 AddImplicitIncludeMacros(Builder, InitOpts.MacroIncludes[i]); 979 980 // Process -include-pch/-include-pth directives. 981 if (!InitOpts.ImplicitPCHInclude.empty()) 982 AddImplicitIncludePCH(Builder, PP, PCHContainerRdr, 983 InitOpts.ImplicitPCHInclude); 984 if (!InitOpts.ImplicitPTHInclude.empty()) 985 AddImplicitIncludePTH(Builder, PP, InitOpts.ImplicitPTHInclude); 986 987 // Process -include directives. 988 for (unsigned i = 0, e = InitOpts.Includes.size(); i != e; ++i) { 989 const std::string &Path = InitOpts.Includes[i]; 990 AddImplicitInclude(Builder, Path); 991 } 992 993 // Exit the command line and go back to <built-in> (2 is LC_LEAVE). 994 if (!PP.getLangOpts().AsmPreprocessor) 995 Builder.append("# 1 \"<built-in>\" 2"); 996 997 // Instruct the preprocessor to skip the preamble. 998 PP.setSkipMainFilePreamble(InitOpts.PrecompiledPreambleBytes.first, 999 InitOpts.PrecompiledPreambleBytes.second); 1000 1001 // Copy PredefinedBuffer into the Preprocessor. 1002 PP.setPredefines(Predefines.str()); 1003 } 1004
