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/Basic/FileManager.h" 15 #include "clang/Basic/MacroBuilder.h" 16 #include "clang/Basic/SourceManager.h" 17 #include "clang/Basic/SyncScope.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/Frontend/Utils.h" 23 #include "clang/Lex/HeaderSearch.h" 24 #include "clang/Lex/PTHManager.h" 25 #include "clang/Lex/Preprocessor.h" 26 #include "clang/Lex/PreprocessorOptions.h" 27 #include "clang/Serialization/ASTReader.h" 28 #include "llvm/ADT/APFloat.h" 29 using namespace clang; 30 31 static bool MacroBodyEndsInBackslash(StringRef MacroBody) { 32 while (!MacroBody.empty() && isWhitespace(MacroBody.back())) 33 MacroBody = MacroBody.drop_back(); 34 return !MacroBody.empty() && MacroBody.back() == '\\'; 35 } 36 37 // Append a #define line to Buf for Macro. Macro should be of the form XXX, 38 // in which case we emit "#define XXX 1" or "XXX=Y z W" in which case we emit 39 // "#define XXX Y z W". To get a #define with no value, use "XXX=". 40 static void DefineBuiltinMacro(MacroBuilder &Builder, StringRef Macro, 41 DiagnosticsEngine &Diags) { 42 std::pair<StringRef, StringRef> MacroPair = Macro.split('='); 43 StringRef MacroName = MacroPair.first; 44 StringRef MacroBody = MacroPair.second; 45 if (MacroName.size() != Macro.size()) { 46 // Per GCC -D semantics, the macro ends at \n if it exists. 47 StringRef::size_type End = MacroBody.find_first_of("\n\r"); 48 if (End != StringRef::npos) 49 Diags.Report(diag::warn_fe_macro_contains_embedded_newline) 50 << MacroName; 51 MacroBody = MacroBody.substr(0, End); 52 // We handle macro bodies which end in a backslash by appending an extra 53 // backslash+newline. This makes sure we don't accidentally treat the 54 // backslash as a line continuation marker. 55 if (MacroBodyEndsInBackslash(MacroBody)) 56 Builder.defineMacro(MacroName, Twine(MacroBody) + "\\\n"); 57 else 58 Builder.defineMacro(MacroName, MacroBody); 59 } else { 60 // Push "macroname 1". 61 Builder.defineMacro(Macro); 62 } 63 } 64 65 /// AddImplicitInclude - Add an implicit \#include of the specified file to the 66 /// predefines buffer. 67 /// As these includes are generated by -include arguments the header search 68 /// logic is going to search relatively to the current working directory. 69 static void AddImplicitInclude(MacroBuilder &Builder, StringRef File) { 70 Builder.append(Twine("#include \"") + File + "\""); 71 } 72 73 static void AddImplicitIncludeMacros(MacroBuilder &Builder, StringRef File) { 74 Builder.append(Twine("#__include_macros \"") + File + "\""); 75 // Marker token to stop the __include_macros fetch loop. 76 Builder.append("##"); // ##? 77 } 78 79 /// AddImplicitIncludePTH - Add an implicit \#include using the original file 80 /// used to generate a PTH cache. 81 static void AddImplicitIncludePTH(MacroBuilder &Builder, Preprocessor &PP, 82 StringRef ImplicitIncludePTH) { 83 PTHManager *P = PP.getPTHManager(); 84 // Null check 'P' in the corner case where it couldn't be created. 85 const char *OriginalFile = P ? P->getOriginalSourceFile() : nullptr; 86 87 if (!OriginalFile) { 88 PP.getDiagnostics().Report(diag::err_fe_pth_file_has_no_source_header) 89 << ImplicitIncludePTH; 90 return; 91 } 92 93 AddImplicitInclude(Builder, OriginalFile); 94 } 95 96 /// \brief Add an implicit \#include using the original file used to generate 97 /// a PCH file. 98 static void AddImplicitIncludePCH(MacroBuilder &Builder, Preprocessor &PP, 99 const PCHContainerReader &PCHContainerRdr, 100 StringRef ImplicitIncludePCH) { 101 std::string OriginalFile = 102 ASTReader::getOriginalSourceFile(ImplicitIncludePCH, PP.getFileManager(), 103 PCHContainerRdr, PP.getDiagnostics()); 104 if (OriginalFile.empty()) 105 return; 106 107 AddImplicitInclude(Builder, OriginalFile); 108 } 109 110 /// PickFP - This is used to pick a value based on the FP semantics of the 111 /// specified FP model. 112 template <typename T> 113 static T PickFP(const llvm::fltSemantics *Sem, T IEEEHalfVal, T IEEESingleVal, 114 T IEEEDoubleVal, T X87DoubleExtendedVal, T PPCDoubleDoubleVal, 115 T IEEEQuadVal) { 116 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEhalf()) 117 return IEEEHalfVal; 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, "5.9604644775390625e-8", "1.40129846e-45", 134 "4.9406564584124654e-324", "3.64519953188247460253e-4951", 135 "4.94065645841246544176568792868221e-324", 136 "6.47517511943802511092443895822764655e-4966"); 137 int Digits = PickFP(Sem, 3, 6, 15, 18, 31, 33); 138 int DecimalDigits = PickFP(Sem, 5, 9, 17, 21, 33, 36); 139 Epsilon = PickFP(Sem, "9.765625e-4", "1.19209290e-7", 140 "2.2204460492503131e-16", "1.08420217248550443401e-19", 141 "4.94065645841246544176568792868221e-324", 142 "1.92592994438723585305597794258492732e-34"); 143 int MantissaDigits = PickFP(Sem, 11, 24, 53, 64, 106, 113); 144 int Min10Exp = PickFP(Sem, -13, -37, -307, -4931, -291, -4931); 145 int Max10Exp = PickFP(Sem, 4, 38, 308, 4932, 308, 4932); 146 int MinExp = PickFP(Sem, -14, -125, -1021, -16381, -968, -16381); 147 int MaxExp = PickFP(Sem, 15, 128, 1024, 16384, 1024, 16384); 148 Min = PickFP(Sem, "6.103515625e-5", "1.17549435e-38", "2.2250738585072014e-308", 149 "3.36210314311209350626e-4932", 150 "2.00416836000897277799610805135016e-292", 151 "3.36210314311209350626267781732175260e-4932"); 152 Max = PickFP(Sem, "6.5504e+4", "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++20. 381 if (LangOpts.CPlusPlus2a) 382 Builder.defineMacro("__cplusplus", "201707L"); 383 // C++17 [cpp.predefined]p1: 384 // The name __cplusplus is defined to the value 201703L when compiling a 385 // C++ translation unit. 386 else if (LangOpts.CPlusPlus17) 387 Builder.defineMacro("__cplusplus", "201703L"); 388 // C++1y [cpp.predefined]p1: 389 // The name __cplusplus is defined to the value 201402L when compiling a 390 // C++ translation unit. 391 else if (LangOpts.CPlusPlus14) 392 Builder.defineMacro("__cplusplus", "201402L"); 393 // C++11 [cpp.predefined]p1: 394 // The name __cplusplus is defined to the value 201103L when compiling a 395 // C++ translation unit. 396 else if (LangOpts.CPlusPlus11) 397 Builder.defineMacro("__cplusplus", "201103L"); 398 // C++03 [cpp.predefined]p1: 399 // The name __cplusplus is defined to the value 199711L when compiling a 400 // C++ translation unit. 401 else 402 Builder.defineMacro("__cplusplus", "199711L"); 403 404 // C++1z [cpp.predefined]p1: 405 // An integer literal of type std::size_t whose value is the alignment 406 // guaranteed by a call to operator new(std::size_t) 407 // 408 // We provide this in all language modes, since it seems generally useful. 409 Builder.defineMacro("__STDCPP_DEFAULT_NEW_ALIGNMENT__", 410 Twine(TI.getNewAlign() / TI.getCharWidth()) + 411 TI.getTypeConstantSuffix(TI.getSizeType())); 412 } 413 414 // In C11 these are environment macros. In C++11 they are only defined 415 // as part of <cuchar>. To prevent breakage when mixing C and C++ 416 // code, define these macros unconditionally. We can define them 417 // unconditionally, as Clang always uses UTF-16 and UTF-32 for 16-bit 418 // and 32-bit character literals. 419 Builder.defineMacro("__STDC_UTF_16__", "1"); 420 Builder.defineMacro("__STDC_UTF_32__", "1"); 421 422 if (LangOpts.ObjC1) 423 Builder.defineMacro("__OBJC__"); 424 425 // OpenCL v1.0/1.1 s6.9, v1.2/2.0 s6.10: Preprocessor Directives and Macros. 426 if (LangOpts.OpenCL) { 427 // OpenCL v1.0 and v1.1 do not have a predefined macro to indicate the 428 // language standard with which the program is compiled. __OPENCL_VERSION__ 429 // is for the OpenCL version supported by the OpenCL device, which is not 430 // necessarily the language standard with which the program is compiled. 431 // A shared OpenCL header file requires a macro to indicate the language 432 // standard. As a workaround, __OPENCL_C_VERSION__ is defined for 433 // OpenCL v1.0 and v1.1. 434 switch (LangOpts.OpenCLVersion) { 435 case 100: 436 Builder.defineMacro("__OPENCL_C_VERSION__", "100"); 437 break; 438 case 110: 439 Builder.defineMacro("__OPENCL_C_VERSION__", "110"); 440 break; 441 case 120: 442 Builder.defineMacro("__OPENCL_C_VERSION__", "120"); 443 break; 444 case 200: 445 Builder.defineMacro("__OPENCL_C_VERSION__", "200"); 446 break; 447 default: 448 llvm_unreachable("Unsupported OpenCL version"); 449 } 450 Builder.defineMacro("CL_VERSION_1_0", "100"); 451 Builder.defineMacro("CL_VERSION_1_1", "110"); 452 Builder.defineMacro("CL_VERSION_1_2", "120"); 453 Builder.defineMacro("CL_VERSION_2_0", "200"); 454 455 if (TI.isLittleEndian()) 456 Builder.defineMacro("__ENDIAN_LITTLE__"); 457 458 if (LangOpts.FastRelaxedMath) 459 Builder.defineMacro("__FAST_RELAXED_MATH__"); 460 } 461 // Not "standard" per se, but available even with the -undef flag. 462 if (LangOpts.AsmPreprocessor) 463 Builder.defineMacro("__ASSEMBLER__"); 464 if (LangOpts.CUDA) 465 Builder.defineMacro("__CUDA__"); 466 } 467 468 /// Initialize the predefined C++ language feature test macros defined in 469 /// ISO/IEC JTC1/SC22/WG21 (C++) SD-6: "SG10 Feature Test Recommendations". 470 static void InitializeCPlusPlusFeatureTestMacros(const LangOptions &LangOpts, 471 MacroBuilder &Builder) { 472 // C++98 features. 473 if (LangOpts.RTTI) 474 Builder.defineMacro("__cpp_rtti", "199711"); 475 if (LangOpts.CXXExceptions) 476 Builder.defineMacro("__cpp_exceptions", "199711"); 477 478 // C++11 features. 479 if (LangOpts.CPlusPlus11) { 480 Builder.defineMacro("__cpp_unicode_characters", "200704"); 481 Builder.defineMacro("__cpp_raw_strings", "200710"); 482 Builder.defineMacro("__cpp_unicode_literals", "200710"); 483 Builder.defineMacro("__cpp_user_defined_literals", "200809"); 484 Builder.defineMacro("__cpp_lambdas", "200907"); 485 Builder.defineMacro("__cpp_constexpr", 486 LangOpts.CPlusPlus17 ? "201603" : 487 LangOpts.CPlusPlus14 ? "201304" : "200704"); 488 Builder.defineMacro("__cpp_range_based_for", 489 LangOpts.CPlusPlus17 ? "201603" : "200907"); 490 Builder.defineMacro("__cpp_static_assert", 491 LangOpts.CPlusPlus17 ? "201411" : "200410"); 492 Builder.defineMacro("__cpp_decltype", "200707"); 493 Builder.defineMacro("__cpp_attributes", "200809"); 494 Builder.defineMacro("__cpp_rvalue_references", "200610"); 495 Builder.defineMacro("__cpp_variadic_templates", "200704"); 496 Builder.defineMacro("__cpp_initializer_lists", "200806"); 497 Builder.defineMacro("__cpp_delegating_constructors", "200604"); 498 Builder.defineMacro("__cpp_nsdmi", "200809"); 499 Builder.defineMacro("__cpp_inheriting_constructors", "201511"); 500 Builder.defineMacro("__cpp_ref_qualifiers", "200710"); 501 Builder.defineMacro("__cpp_alias_templates", "200704"); 502 } 503 if (LangOpts.ThreadsafeStatics) 504 Builder.defineMacro("__cpp_threadsafe_static_init", "200806"); 505 506 // C++14 features. 507 if (LangOpts.CPlusPlus14) { 508 Builder.defineMacro("__cpp_binary_literals", "201304"); 509 Builder.defineMacro("__cpp_digit_separators", "201309"); 510 Builder.defineMacro("__cpp_init_captures", "201304"); 511 Builder.defineMacro("__cpp_generic_lambdas", "201304"); 512 Builder.defineMacro("__cpp_decltype_auto", "201304"); 513 Builder.defineMacro("__cpp_return_type_deduction", "201304"); 514 Builder.defineMacro("__cpp_aggregate_nsdmi", "201304"); 515 Builder.defineMacro("__cpp_variable_templates", "201304"); 516 } 517 if (LangOpts.SizedDeallocation) 518 Builder.defineMacro("__cpp_sized_deallocation", "201309"); 519 520 // C++17 features. 521 if (LangOpts.CPlusPlus17) { 522 Builder.defineMacro("__cpp_hex_float", "201603"); 523 Builder.defineMacro("__cpp_inline_variables", "201606"); 524 Builder.defineMacro("__cpp_noexcept_function_type", "201510"); 525 Builder.defineMacro("__cpp_capture_star_this", "201603"); 526 Builder.defineMacro("__cpp_if_constexpr", "201606"); 527 Builder.defineMacro("__cpp_deduction_guides", "201611"); 528 Builder.defineMacro("__cpp_template_auto", "201606"); 529 Builder.defineMacro("__cpp_namespace_attributes", "201411"); 530 Builder.defineMacro("__cpp_enumerator_attributes", "201411"); 531 Builder.defineMacro("__cpp_nested_namespace_definitions", "201411"); 532 Builder.defineMacro("__cpp_variadic_using", "201611"); 533 Builder.defineMacro("__cpp_aggregate_bases", "201603"); 534 Builder.defineMacro("__cpp_structured_bindings", "201606"); 535 Builder.defineMacro("__cpp_nontype_template_args", "201411"); 536 Builder.defineMacro("__cpp_fold_expressions", "201603"); 537 } 538 if (LangOpts.AlignedAllocation) 539 Builder.defineMacro("__cpp_aligned_new", "201606"); 540 541 // TS features. 542 if (LangOpts.ConceptsTS) 543 Builder.defineMacro("__cpp_experimental_concepts", "1"); 544 if (LangOpts.CoroutinesTS) 545 Builder.defineMacro("__cpp_coroutines", "201703L"); 546 } 547 548 static void InitializePredefinedMacros(const TargetInfo &TI, 549 const LangOptions &LangOpts, 550 const FrontendOptions &FEOpts, 551 MacroBuilder &Builder) { 552 // Compiler version introspection macros. 553 Builder.defineMacro("__llvm__"); // LLVM Backend 554 Builder.defineMacro("__clang__"); // Clang Frontend 555 #define TOSTR2(X) #X 556 #define TOSTR(X) TOSTR2(X) 557 Builder.defineMacro("__clang_major__", TOSTR(CLANG_VERSION_MAJOR)); 558 Builder.defineMacro("__clang_minor__", TOSTR(CLANG_VERSION_MINOR)); 559 Builder.defineMacro("__clang_patchlevel__", TOSTR(CLANG_VERSION_PATCHLEVEL)); 560 #undef TOSTR 561 #undef TOSTR2 562 Builder.defineMacro("__clang_version__", 563 "\"" CLANG_VERSION_STRING " " 564 + getClangFullRepositoryVersion() + "\""); 565 if (!LangOpts.MSVCCompat) { 566 // Currently claim to be compatible with GCC 4.2.1-5621, but only if we're 567 // not compiling for MSVC compatibility 568 Builder.defineMacro("__GNUC_MINOR__", "2"); 569 Builder.defineMacro("__GNUC_PATCHLEVEL__", "1"); 570 Builder.defineMacro("__GNUC__", "4"); 571 Builder.defineMacro("__GXX_ABI_VERSION", "1002"); 572 } 573 574 // Define macros for the C11 / C++11 memory orderings 575 Builder.defineMacro("__ATOMIC_RELAXED", "0"); 576 Builder.defineMacro("__ATOMIC_CONSUME", "1"); 577 Builder.defineMacro("__ATOMIC_ACQUIRE", "2"); 578 Builder.defineMacro("__ATOMIC_RELEASE", "3"); 579 Builder.defineMacro("__ATOMIC_ACQ_REL", "4"); 580 Builder.defineMacro("__ATOMIC_SEQ_CST", "5"); 581 582 // Define macros for the OpenCL memory scope. 583 // The values should match AtomicScopeOpenCLModel::ID enum. 584 static_assert( 585 static_cast<unsigned>(AtomicScopeOpenCLModel::WorkGroup) == 1 && 586 static_cast<unsigned>(AtomicScopeOpenCLModel::Device) == 2 && 587 static_cast<unsigned>(AtomicScopeOpenCLModel::AllSVMDevices) == 3 && 588 static_cast<unsigned>(AtomicScopeOpenCLModel::SubGroup) == 4, 589 "Invalid OpenCL memory scope enum definition"); 590 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_WORK_ITEM", "0"); 591 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_WORK_GROUP", "1"); 592 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_DEVICE", "2"); 593 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_ALL_SVM_DEVICES", "3"); 594 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_SUB_GROUP", "4"); 595 596 // Support for #pragma redefine_extname (Sun compatibility) 597 Builder.defineMacro("__PRAGMA_REDEFINE_EXTNAME", "1"); 598 599 // As sad as it is, enough software depends on the __VERSION__ for version 600 // checks that it is necessary to report 4.2.1 (the base GCC version we claim 601 // compatibility with) first. 602 Builder.defineMacro("__VERSION__", "\"4.2.1 Compatible " + 603 Twine(getClangFullCPPVersion()) + "\""); 604 605 // Initialize language-specific preprocessor defines. 606 607 // Standard conforming mode? 608 if (!LangOpts.GNUMode && !LangOpts.MSVCCompat) 609 Builder.defineMacro("__STRICT_ANSI__"); 610 611 if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus11) 612 Builder.defineMacro("__GXX_EXPERIMENTAL_CXX0X__"); 613 614 if (LangOpts.ObjC1) { 615 if (LangOpts.ObjCRuntime.isNonFragile()) { 616 Builder.defineMacro("__OBJC2__"); 617 618 if (LangOpts.ObjCExceptions) 619 Builder.defineMacro("OBJC_ZEROCOST_EXCEPTIONS"); 620 } 621 622 if (LangOpts.getGC() != LangOptions::NonGC) 623 Builder.defineMacro("__OBJC_GC__"); 624 625 if (LangOpts.ObjCRuntime.isNeXTFamily()) 626 Builder.defineMacro("__NEXT_RUNTIME__"); 627 628 if (LangOpts.ObjCRuntime.getKind() == ObjCRuntime::ObjFW) { 629 VersionTuple tuple = LangOpts.ObjCRuntime.getVersion(); 630 631 unsigned minor = 0; 632 if (tuple.getMinor().hasValue()) 633 minor = tuple.getMinor().getValue(); 634 635 unsigned subminor = 0; 636 if (tuple.getSubminor().hasValue()) 637 subminor = tuple.getSubminor().getValue(); 638 639 Builder.defineMacro("__OBJFW_RUNTIME_ABI__", 640 Twine(tuple.getMajor() * 10000 + minor * 100 + 641 subminor)); 642 } 643 644 Builder.defineMacro("IBOutlet", "__attribute__((iboutlet))"); 645 Builder.defineMacro("IBOutletCollection(ClassName)", 646 "__attribute__((iboutletcollection(ClassName)))"); 647 Builder.defineMacro("IBAction", "void)__attribute__((ibaction)"); 648 Builder.defineMacro("IBInspectable", ""); 649 Builder.defineMacro("IB_DESIGNABLE", ""); 650 } 651 652 // Define a macro that describes the Objective-C boolean type even for C 653 // and C++ since BOOL can be used from non Objective-C code. 654 Builder.defineMacro("__OBJC_BOOL_IS_BOOL", 655 Twine(TI.useSignedCharForObjCBool() ? "0" : "1")); 656 657 if (LangOpts.CPlusPlus) 658 InitializeCPlusPlusFeatureTestMacros(LangOpts, Builder); 659 660 // darwin_constant_cfstrings controls this. This is also dependent 661 // on other things like the runtime I believe. This is set even for C code. 662 if (!LangOpts.NoConstantCFStrings) 663 Builder.defineMacro("__CONSTANT_CFSTRINGS__"); 664 665 if (LangOpts.ObjC2) 666 Builder.defineMacro("OBJC_NEW_PROPERTIES"); 667 668 if (LangOpts.PascalStrings) 669 Builder.defineMacro("__PASCAL_STRINGS__"); 670 671 if (LangOpts.Blocks) { 672 Builder.defineMacro("__block", "__attribute__((__blocks__(byref)))"); 673 Builder.defineMacro("__BLOCKS__"); 674 } 675 676 if (!LangOpts.MSVCCompat && LangOpts.Exceptions) 677 Builder.defineMacro("__EXCEPTIONS"); 678 if (!LangOpts.MSVCCompat && LangOpts.RTTI) 679 Builder.defineMacro("__GXX_RTTI"); 680 681 if (LangOpts.SjLjExceptions) 682 Builder.defineMacro("__USING_SJLJ_EXCEPTIONS__"); 683 else if (LangOpts.SEHExceptions) 684 Builder.defineMacro("__SEH__"); 685 else if (LangOpts.DWARFExceptions && 686 (TI.getTriple().isThumb() || TI.getTriple().isARM())) 687 Builder.defineMacro("__ARM_DWARF_EH__"); 688 689 if (LangOpts.Deprecated) 690 Builder.defineMacro("__DEPRECATED"); 691 692 if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus) { 693 Builder.defineMacro("__GNUG__", "4"); 694 Builder.defineMacro("__GXX_WEAK__"); 695 Builder.defineMacro("__private_extern__", "extern"); 696 } 697 698 if (LangOpts.MicrosoftExt) { 699 if (LangOpts.WChar) { 700 // wchar_t supported as a keyword. 701 Builder.defineMacro("_WCHAR_T_DEFINED"); 702 Builder.defineMacro("_NATIVE_WCHAR_T_DEFINED"); 703 } 704 } 705 706 if (LangOpts.Optimize) 707 Builder.defineMacro("__OPTIMIZE__"); 708 if (LangOpts.OptimizeSize) 709 Builder.defineMacro("__OPTIMIZE_SIZE__"); 710 711 if (LangOpts.FastMath) 712 Builder.defineMacro("__FAST_MATH__"); 713 714 // Initialize target-specific preprocessor defines. 715 716 // __BYTE_ORDER__ was added in GCC 4.6. It's analogous 717 // to the macro __BYTE_ORDER (no trailing underscores) 718 // from glibc's <endian.h> header. 719 // We don't support the PDP-11 as a target, but include 720 // the define so it can still be compared against. 721 Builder.defineMacro("__ORDER_LITTLE_ENDIAN__", "1234"); 722 Builder.defineMacro("__ORDER_BIG_ENDIAN__", "4321"); 723 Builder.defineMacro("__ORDER_PDP_ENDIAN__", "3412"); 724 if (TI.isBigEndian()) { 725 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_BIG_ENDIAN__"); 726 Builder.defineMacro("__BIG_ENDIAN__"); 727 } else { 728 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_LITTLE_ENDIAN__"); 729 Builder.defineMacro("__LITTLE_ENDIAN__"); 730 } 731 732 if (TI.getPointerWidth(0) == 64 && TI.getLongWidth() == 64 733 && TI.getIntWidth() == 32) { 734 Builder.defineMacro("_LP64"); 735 Builder.defineMacro("__LP64__"); 736 } 737 738 if (TI.getPointerWidth(0) == 32 && TI.getLongWidth() == 32 739 && TI.getIntWidth() == 32) { 740 Builder.defineMacro("_ILP32"); 741 Builder.defineMacro("__ILP32__"); 742 } 743 744 // Define type sizing macros based on the target properties. 745 assert(TI.getCharWidth() == 8 && "Only support 8-bit char so far"); 746 Builder.defineMacro("__CHAR_BIT__", Twine(TI.getCharWidth())); 747 748 DefineTypeSize("__SCHAR_MAX__", TargetInfo::SignedChar, TI, Builder); 749 DefineTypeSize("__SHRT_MAX__", TargetInfo::SignedShort, TI, Builder); 750 DefineTypeSize("__INT_MAX__", TargetInfo::SignedInt, TI, Builder); 751 DefineTypeSize("__LONG_MAX__", TargetInfo::SignedLong, TI, Builder); 752 DefineTypeSize("__LONG_LONG_MAX__", TargetInfo::SignedLongLong, TI, Builder); 753 DefineTypeSize("__WCHAR_MAX__", TI.getWCharType(), TI, Builder); 754 DefineTypeSize("__INTMAX_MAX__", TI.getIntMaxType(), TI, Builder); 755 DefineTypeSize("__SIZE_MAX__", TI.getSizeType(), TI, Builder); 756 757 DefineTypeSize("__UINTMAX_MAX__", TI.getUIntMaxType(), TI, Builder); 758 DefineTypeSize("__PTRDIFF_MAX__", TI.getPtrDiffType(0), TI, Builder); 759 DefineTypeSize("__INTPTR_MAX__", TI.getIntPtrType(), TI, Builder); 760 DefineTypeSize("__UINTPTR_MAX__", TI.getUIntPtrType(), TI, Builder); 761 762 DefineTypeSizeof("__SIZEOF_DOUBLE__", TI.getDoubleWidth(), TI, Builder); 763 DefineTypeSizeof("__SIZEOF_FLOAT__", TI.getFloatWidth(), TI, Builder); 764 DefineTypeSizeof("__SIZEOF_INT__", TI.getIntWidth(), TI, Builder); 765 DefineTypeSizeof("__SIZEOF_LONG__", TI.getLongWidth(), TI, Builder); 766 DefineTypeSizeof("__SIZEOF_LONG_DOUBLE__",TI.getLongDoubleWidth(),TI,Builder); 767 DefineTypeSizeof("__SIZEOF_LONG_LONG__", TI.getLongLongWidth(), TI, Builder); 768 DefineTypeSizeof("__SIZEOF_POINTER__", TI.getPointerWidth(0), TI, Builder); 769 DefineTypeSizeof("__SIZEOF_SHORT__", TI.getShortWidth(), TI, Builder); 770 DefineTypeSizeof("__SIZEOF_PTRDIFF_T__", 771 TI.getTypeWidth(TI.getPtrDiffType(0)), TI, Builder); 772 DefineTypeSizeof("__SIZEOF_SIZE_T__", 773 TI.getTypeWidth(TI.getSizeType()), TI, Builder); 774 DefineTypeSizeof("__SIZEOF_WCHAR_T__", 775 TI.getTypeWidth(TI.getWCharType()), TI, Builder); 776 DefineTypeSizeof("__SIZEOF_WINT_T__", 777 TI.getTypeWidth(TI.getWIntType()), TI, Builder); 778 if (TI.hasInt128Type()) 779 DefineTypeSizeof("__SIZEOF_INT128__", 128, TI, Builder); 780 781 DefineType("__INTMAX_TYPE__", TI.getIntMaxType(), Builder); 782 DefineFmt("__INTMAX", TI.getIntMaxType(), TI, Builder); 783 Builder.defineMacro("__INTMAX_C_SUFFIX__", 784 TI.getTypeConstantSuffix(TI.getIntMaxType())); 785 DefineType("__UINTMAX_TYPE__", TI.getUIntMaxType(), Builder); 786 DefineFmt("__UINTMAX", TI.getUIntMaxType(), TI, Builder); 787 Builder.defineMacro("__UINTMAX_C_SUFFIX__", 788 TI.getTypeConstantSuffix(TI.getUIntMaxType())); 789 DefineTypeWidth("__INTMAX_WIDTH__", TI.getIntMaxType(), TI, Builder); 790 DefineType("__PTRDIFF_TYPE__", TI.getPtrDiffType(0), Builder); 791 DefineFmt("__PTRDIFF", TI.getPtrDiffType(0), TI, Builder); 792 DefineTypeWidth("__PTRDIFF_WIDTH__", TI.getPtrDiffType(0), TI, Builder); 793 DefineType("__INTPTR_TYPE__", TI.getIntPtrType(), Builder); 794 DefineFmt("__INTPTR", TI.getIntPtrType(), TI, Builder); 795 DefineTypeWidth("__INTPTR_WIDTH__", TI.getIntPtrType(), TI, Builder); 796 DefineType("__SIZE_TYPE__", TI.getSizeType(), Builder); 797 DefineFmt("__SIZE", TI.getSizeType(), TI, Builder); 798 DefineTypeWidth("__SIZE_WIDTH__", TI.getSizeType(), TI, Builder); 799 DefineType("__WCHAR_TYPE__", TI.getWCharType(), Builder); 800 DefineTypeWidth("__WCHAR_WIDTH__", TI.getWCharType(), TI, Builder); 801 DefineType("__WINT_TYPE__", TI.getWIntType(), Builder); 802 DefineTypeWidth("__WINT_WIDTH__", TI.getWIntType(), TI, Builder); 803 DefineTypeWidth("__SIG_ATOMIC_WIDTH__", TI.getSigAtomicType(), TI, Builder); 804 DefineTypeSize("__SIG_ATOMIC_MAX__", TI.getSigAtomicType(), TI, Builder); 805 DefineType("__CHAR16_TYPE__", TI.getChar16Type(), Builder); 806 DefineType("__CHAR32_TYPE__", TI.getChar32Type(), Builder); 807 808 DefineTypeWidth("__UINTMAX_WIDTH__", TI.getUIntMaxType(), TI, Builder); 809 DefineType("__UINTPTR_TYPE__", TI.getUIntPtrType(), Builder); 810 DefineFmt("__UINTPTR", TI.getUIntPtrType(), TI, Builder); 811 DefineTypeWidth("__UINTPTR_WIDTH__", TI.getUIntPtrType(), TI, Builder); 812 813 DefineFloatMacros(Builder, "FLT16", &TI.getHalfFormat(), "F16"); 814 DefineFloatMacros(Builder, "FLT", &TI.getFloatFormat(), "F"); 815 DefineFloatMacros(Builder, "DBL", &TI.getDoubleFormat(), ""); 816 DefineFloatMacros(Builder, "LDBL", &TI.getLongDoubleFormat(), "L"); 817 818 // Define a __POINTER_WIDTH__ macro for stdint.h. 819 Builder.defineMacro("__POINTER_WIDTH__", 820 Twine((int)TI.getPointerWidth(0))); 821 822 // Define __BIGGEST_ALIGNMENT__ to be compatible with gcc. 823 Builder.defineMacro("__BIGGEST_ALIGNMENT__", 824 Twine(TI.getSuitableAlign() / TI.getCharWidth()) ); 825 826 if (!LangOpts.CharIsSigned) 827 Builder.defineMacro("__CHAR_UNSIGNED__"); 828 829 if (!TargetInfo::isTypeSigned(TI.getWCharType())) 830 Builder.defineMacro("__WCHAR_UNSIGNED__"); 831 832 if (!TargetInfo::isTypeSigned(TI.getWIntType())) 833 Builder.defineMacro("__WINT_UNSIGNED__"); 834 835 // Define exact-width integer types for stdint.h 836 DefineExactWidthIntType(TargetInfo::SignedChar, TI, Builder); 837 838 if (TI.getShortWidth() > TI.getCharWidth()) 839 DefineExactWidthIntType(TargetInfo::SignedShort, TI, Builder); 840 841 if (TI.getIntWidth() > TI.getShortWidth()) 842 DefineExactWidthIntType(TargetInfo::SignedInt, TI, Builder); 843 844 if (TI.getLongWidth() > TI.getIntWidth()) 845 DefineExactWidthIntType(TargetInfo::SignedLong, TI, Builder); 846 847 if (TI.getLongLongWidth() > TI.getLongWidth()) 848 DefineExactWidthIntType(TargetInfo::SignedLongLong, TI, Builder); 849 850 DefineExactWidthIntType(TargetInfo::UnsignedChar, TI, Builder); 851 DefineExactWidthIntTypeSize(TargetInfo::UnsignedChar, TI, Builder); 852 DefineExactWidthIntTypeSize(TargetInfo::SignedChar, TI, Builder); 853 854 if (TI.getShortWidth() > TI.getCharWidth()) { 855 DefineExactWidthIntType(TargetInfo::UnsignedShort, TI, Builder); 856 DefineExactWidthIntTypeSize(TargetInfo::UnsignedShort, TI, Builder); 857 DefineExactWidthIntTypeSize(TargetInfo::SignedShort, TI, Builder); 858 } 859 860 if (TI.getIntWidth() > TI.getShortWidth()) { 861 DefineExactWidthIntType(TargetInfo::UnsignedInt, TI, Builder); 862 DefineExactWidthIntTypeSize(TargetInfo::UnsignedInt, TI, Builder); 863 DefineExactWidthIntTypeSize(TargetInfo::SignedInt, TI, Builder); 864 } 865 866 if (TI.getLongWidth() > TI.getIntWidth()) { 867 DefineExactWidthIntType(TargetInfo::UnsignedLong, TI, Builder); 868 DefineExactWidthIntTypeSize(TargetInfo::UnsignedLong, TI, Builder); 869 DefineExactWidthIntTypeSize(TargetInfo::SignedLong, TI, Builder); 870 } 871 872 if (TI.getLongLongWidth() > TI.getLongWidth()) { 873 DefineExactWidthIntType(TargetInfo::UnsignedLongLong, TI, Builder); 874 DefineExactWidthIntTypeSize(TargetInfo::UnsignedLongLong, TI, Builder); 875 DefineExactWidthIntTypeSize(TargetInfo::SignedLongLong, TI, Builder); 876 } 877 878 DefineLeastWidthIntType(8, true, TI, Builder); 879 DefineLeastWidthIntType(8, false, TI, Builder); 880 DefineLeastWidthIntType(16, true, TI, Builder); 881 DefineLeastWidthIntType(16, false, TI, Builder); 882 DefineLeastWidthIntType(32, true, TI, Builder); 883 DefineLeastWidthIntType(32, false, TI, Builder); 884 DefineLeastWidthIntType(64, true, TI, Builder); 885 DefineLeastWidthIntType(64, false, TI, Builder); 886 887 DefineFastIntType(8, true, TI, Builder); 888 DefineFastIntType(8, false, TI, Builder); 889 DefineFastIntType(16, true, TI, Builder); 890 DefineFastIntType(16, false, TI, Builder); 891 DefineFastIntType(32, true, TI, Builder); 892 DefineFastIntType(32, false, TI, Builder); 893 DefineFastIntType(64, true, TI, Builder); 894 DefineFastIntType(64, false, TI, Builder); 895 896 char UserLabelPrefix[2] = {TI.getDataLayout().getGlobalPrefix(), 0}; 897 Builder.defineMacro("__USER_LABEL_PREFIX__", UserLabelPrefix); 898 899 if (LangOpts.FastMath || LangOpts.FiniteMathOnly) 900 Builder.defineMacro("__FINITE_MATH_ONLY__", "1"); 901 else 902 Builder.defineMacro("__FINITE_MATH_ONLY__", "0"); 903 904 if (!LangOpts.MSVCCompat) { 905 if (LangOpts.GNUInline || LangOpts.CPlusPlus) 906 Builder.defineMacro("__GNUC_GNU_INLINE__"); 907 else 908 Builder.defineMacro("__GNUC_STDC_INLINE__"); 909 910 // The value written by __atomic_test_and_set. 911 // FIXME: This is target-dependent. 912 Builder.defineMacro("__GCC_ATOMIC_TEST_AND_SET_TRUEVAL", "1"); 913 } 914 915 auto addLockFreeMacros = [&](const llvm::Twine &Prefix) { 916 // Used by libc++ and libstdc++ to implement ATOMIC_<foo>_LOCK_FREE. 917 unsigned InlineWidthBits = TI.getMaxAtomicInlineWidth(); 918 #define DEFINE_LOCK_FREE_MACRO(TYPE, Type) \ 919 Builder.defineMacro(Prefix + #TYPE "_LOCK_FREE", \ 920 getLockFreeValue(TI.get##Type##Width(), \ 921 TI.get##Type##Align(), \ 922 InlineWidthBits)); 923 DEFINE_LOCK_FREE_MACRO(BOOL, Bool); 924 DEFINE_LOCK_FREE_MACRO(CHAR, Char); 925 DEFINE_LOCK_FREE_MACRO(CHAR16_T, Char16); 926 DEFINE_LOCK_FREE_MACRO(CHAR32_T, Char32); 927 DEFINE_LOCK_FREE_MACRO(WCHAR_T, WChar); 928 DEFINE_LOCK_FREE_MACRO(SHORT, Short); 929 DEFINE_LOCK_FREE_MACRO(INT, Int); 930 DEFINE_LOCK_FREE_MACRO(LONG, Long); 931 DEFINE_LOCK_FREE_MACRO(LLONG, LongLong); 932 Builder.defineMacro(Prefix + "POINTER_LOCK_FREE", 933 getLockFreeValue(TI.getPointerWidth(0), 934 TI.getPointerAlign(0), 935 InlineWidthBits)); 936 #undef DEFINE_LOCK_FREE_MACRO 937 }; 938 addLockFreeMacros("__CLANG_ATOMIC_"); 939 if (!LangOpts.MSVCCompat) 940 addLockFreeMacros("__GCC_ATOMIC_"); 941 942 if (LangOpts.NoInlineDefine) 943 Builder.defineMacro("__NO_INLINE__"); 944 945 if (unsigned PICLevel = LangOpts.PICLevel) { 946 Builder.defineMacro("__PIC__", Twine(PICLevel)); 947 Builder.defineMacro("__pic__", Twine(PICLevel)); 948 if (LangOpts.PIE) { 949 Builder.defineMacro("__PIE__", Twine(PICLevel)); 950 Builder.defineMacro("__pie__", Twine(PICLevel)); 951 } 952 } 953 954 // Macros to control C99 numerics and <float.h> 955 Builder.defineMacro("__FLT_EVAL_METHOD__", Twine(TI.getFloatEvalMethod())); 956 Builder.defineMacro("__FLT_RADIX__", "2"); 957 Builder.defineMacro("__DECIMAL_DIG__", "__LDBL_DECIMAL_DIG__"); 958 959 if (LangOpts.getStackProtector() == LangOptions::SSPOn) 960 Builder.defineMacro("__SSP__"); 961 else if (LangOpts.getStackProtector() == LangOptions::SSPStrong) 962 Builder.defineMacro("__SSP_STRONG__", "2"); 963 else if (LangOpts.getStackProtector() == LangOptions::SSPReq) 964 Builder.defineMacro("__SSP_ALL__", "3"); 965 966 // Define a macro that exists only when using the static analyzer. 967 if (FEOpts.ProgramAction == frontend::RunAnalysis) 968 Builder.defineMacro("__clang_analyzer__"); 969 970 if (LangOpts.FastRelaxedMath) 971 Builder.defineMacro("__FAST_RELAXED_MATH__"); 972 973 if (FEOpts.ProgramAction == frontend::RewriteObjC || 974 LangOpts.getGC() != LangOptions::NonGC) { 975 Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))"); 976 Builder.defineMacro("__strong", "__attribute__((objc_gc(strong)))"); 977 Builder.defineMacro("__autoreleasing", ""); 978 Builder.defineMacro("__unsafe_unretained", ""); 979 } else if (LangOpts.ObjC1) { 980 Builder.defineMacro("__weak", "__attribute__((objc_ownership(weak)))"); 981 Builder.defineMacro("__strong", "__attribute__((objc_ownership(strong)))"); 982 Builder.defineMacro("__autoreleasing", 983 "__attribute__((objc_ownership(autoreleasing)))"); 984 Builder.defineMacro("__unsafe_unretained", 985 "__attribute__((objc_ownership(none)))"); 986 } 987 988 // On Darwin, there are __double_underscored variants of the type 989 // nullability qualifiers. 990 if (TI.getTriple().isOSDarwin()) { 991 Builder.defineMacro("__nonnull", "_Nonnull"); 992 Builder.defineMacro("__null_unspecified", "_Null_unspecified"); 993 Builder.defineMacro("__nullable", "_Nullable"); 994 } 995 996 // OpenMP definition 997 // OpenMP 2.2: 998 // In implementations that support a preprocessor, the _OPENMP 999 // macro name is defined to have the decimal value yyyymm where 1000 // yyyy and mm are the year and the month designations of the 1001 // version of the OpenMP API that the implementation support. 1002 switch (LangOpts.OpenMP) { 1003 case 0: 1004 break; 1005 case 40: 1006 Builder.defineMacro("_OPENMP", "201307"); 1007 break; 1008 case 45: 1009 Builder.defineMacro("_OPENMP", "201511"); 1010 break; 1011 default: 1012 // Default version is OpenMP 3.1 1013 Builder.defineMacro("_OPENMP", "201107"); 1014 break; 1015 } 1016 1017 // CUDA device path compilaton 1018 if (LangOpts.CUDAIsDevice) { 1019 // The CUDA_ARCH value is set for the GPU target specified in the NVPTX 1020 // backend's target defines. 1021 Builder.defineMacro("__CUDA_ARCH__"); 1022 } 1023 1024 // We need to communicate this to our CUDA header wrapper, which in turn 1025 // informs the proper CUDA headers of this choice. 1026 if (LangOpts.CUDADeviceApproxTranscendentals || LangOpts.FastMath) { 1027 Builder.defineMacro("__CLANG_CUDA_APPROX_TRANSCENDENTALS__"); 1028 } 1029 1030 // OpenCL definitions. 1031 if (LangOpts.OpenCL) { 1032 #define OPENCLEXT(Ext) \ 1033 if (TI.getSupportedOpenCLOpts().isSupported(#Ext, \ 1034 LangOpts.OpenCLVersion)) \ 1035 Builder.defineMacro(#Ext); 1036 #include "clang/Basic/OpenCLExtensions.def" 1037 1038 auto Arch = TI.getTriple().getArch(); 1039 if (Arch == llvm::Triple::spir || Arch == llvm::Triple::spir64) 1040 Builder.defineMacro("__IMAGE_SUPPORT__"); 1041 } 1042 1043 if (TI.hasInt128Type() && LangOpts.CPlusPlus && LangOpts.GNUMode) { 1044 // For each extended integer type, g++ defines a macro mapping the 1045 // index of the type (0 in this case) in some list of extended types 1046 // to the type. 1047 Builder.defineMacro("__GLIBCXX_TYPE_INT_N_0", "__int128"); 1048 Builder.defineMacro("__GLIBCXX_BITSIZE_INT_N_0", "128"); 1049 } 1050 1051 // Get other target #defines. 1052 TI.getTargetDefines(LangOpts, Builder); 1053 } 1054 1055 /// InitializePreprocessor - Initialize the preprocessor getting it and the 1056 /// environment ready to process a single file. This returns true on error. 1057 /// 1058 void clang::InitializePreprocessor( 1059 Preprocessor &PP, const PreprocessorOptions &InitOpts, 1060 const PCHContainerReader &PCHContainerRdr, 1061 const FrontendOptions &FEOpts) { 1062 const LangOptions &LangOpts = PP.getLangOpts(); 1063 std::string PredefineBuffer; 1064 PredefineBuffer.reserve(4080); 1065 llvm::raw_string_ostream Predefines(PredefineBuffer); 1066 MacroBuilder Builder(Predefines); 1067 1068 // Emit line markers for various builtin sections of the file. We don't do 1069 // this in asm preprocessor mode, because "# 4" is not a line marker directive 1070 // in this mode. 1071 if (!PP.getLangOpts().AsmPreprocessor) 1072 Builder.append("# 1 \"<built-in>\" 3"); 1073 1074 // Install things like __POWERPC__, __GNUC__, etc into the macro table. 1075 if (InitOpts.UsePredefines) { 1076 // FIXME: This will create multiple definitions for most of the predefined 1077 // macros. This is not the right way to handle this. 1078 if ((LangOpts.CUDA || LangOpts.OpenMPIsDevice) && PP.getAuxTargetInfo()) 1079 InitializePredefinedMacros(*PP.getAuxTargetInfo(), LangOpts, FEOpts, 1080 Builder); 1081 1082 InitializePredefinedMacros(PP.getTargetInfo(), LangOpts, FEOpts, Builder); 1083 1084 // Install definitions to make Objective-C++ ARC work well with various 1085 // C++ Standard Library implementations. 1086 if (LangOpts.ObjC1 && LangOpts.CPlusPlus && 1087 (LangOpts.ObjCAutoRefCount || LangOpts.ObjCWeak)) { 1088 switch (InitOpts.ObjCXXARCStandardLibrary) { 1089 case ARCXX_nolib: 1090 case ARCXX_libcxx: 1091 break; 1092 1093 case ARCXX_libstdcxx: 1094 AddObjCXXARCLibstdcxxDefines(LangOpts, Builder); 1095 break; 1096 } 1097 } 1098 } 1099 1100 // Even with predefines off, some macros are still predefined. 1101 // These should all be defined in the preprocessor according to the 1102 // current language configuration. 1103 InitializeStandardPredefinedMacros(PP.getTargetInfo(), PP.getLangOpts(), 1104 FEOpts, Builder); 1105 1106 // Add on the predefines from the driver. Wrap in a #line directive to report 1107 // that they come from the command line. 1108 if (!PP.getLangOpts().AsmPreprocessor) 1109 Builder.append("# 1 \"<command line>\" 1"); 1110 1111 // Process #define's and #undef's in the order they are given. 1112 for (unsigned i = 0, e = InitOpts.Macros.size(); i != e; ++i) { 1113 if (InitOpts.Macros[i].second) // isUndef 1114 Builder.undefineMacro(InitOpts.Macros[i].first); 1115 else 1116 DefineBuiltinMacro(Builder, InitOpts.Macros[i].first, 1117 PP.getDiagnostics()); 1118 } 1119 1120 // Exit the command line and go back to <built-in> (2 is LC_LEAVE). 1121 if (!PP.getLangOpts().AsmPreprocessor) 1122 Builder.append("# 1 \"<built-in>\" 2"); 1123 1124 // If -imacros are specified, include them now. These are processed before 1125 // any -include directives. 1126 for (unsigned i = 0, e = InitOpts.MacroIncludes.size(); i != e; ++i) 1127 AddImplicitIncludeMacros(Builder, InitOpts.MacroIncludes[i]); 1128 1129 // Process -include-pch/-include-pth directives. 1130 if (!InitOpts.ImplicitPCHInclude.empty()) 1131 AddImplicitIncludePCH(Builder, PP, PCHContainerRdr, 1132 InitOpts.ImplicitPCHInclude); 1133 if (!InitOpts.ImplicitPTHInclude.empty()) 1134 AddImplicitIncludePTH(Builder, PP, InitOpts.ImplicitPTHInclude); 1135 1136 // Process -include directives. 1137 for (unsigned i = 0, e = InitOpts.Includes.size(); i != e; ++i) { 1138 const std::string &Path = InitOpts.Includes[i]; 1139 AddImplicitInclude(Builder, Path); 1140 } 1141 1142 // Instruct the preprocessor to skip the preamble. 1143 PP.setSkipMainFilePreamble(InitOpts.PrecompiledPreambleBytes.first, 1144 InitOpts.PrecompiledPreambleBytes.second); 1145 1146 // Copy PredefinedBuffer into the Preprocessor. 1147 PP.setPredefines(Predefines.str()); 1148 } 1149