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.C17) 374 Builder.defineMacro("__STDC_VERSION__", "201710L"); 375 else if (LangOpts.C11) 376 Builder.defineMacro("__STDC_VERSION__", "201112L"); 377 else if (LangOpts.C99) 378 Builder.defineMacro("__STDC_VERSION__", "199901L"); 379 else if (!LangOpts.GNUMode && LangOpts.Digraphs) 380 Builder.defineMacro("__STDC_VERSION__", "199409L"); 381 } else { 382 // FIXME: Use correct value for C++20. 383 if (LangOpts.CPlusPlus2a) 384 Builder.defineMacro("__cplusplus", "201707L"); 385 // C++17 [cpp.predefined]p1: 386 // The name __cplusplus is defined to the value 201703L when compiling a 387 // C++ translation unit. 388 else if (LangOpts.CPlusPlus17) 389 Builder.defineMacro("__cplusplus", "201703L"); 390 // C++1y [cpp.predefined]p1: 391 // The name __cplusplus is defined to the value 201402L when compiling a 392 // C++ translation unit. 393 else if (LangOpts.CPlusPlus14) 394 Builder.defineMacro("__cplusplus", "201402L"); 395 // C++11 [cpp.predefined]p1: 396 // The name __cplusplus is defined to the value 201103L when compiling a 397 // C++ translation unit. 398 else if (LangOpts.CPlusPlus11) 399 Builder.defineMacro("__cplusplus", "201103L"); 400 // C++03 [cpp.predefined]p1: 401 // The name __cplusplus is defined to the value 199711L when compiling a 402 // C++ translation unit. 403 else 404 Builder.defineMacro("__cplusplus", "199711L"); 405 406 // C++1z [cpp.predefined]p1: 407 // An integer literal of type std::size_t whose value is the alignment 408 // guaranteed by a call to operator new(std::size_t) 409 // 410 // We provide this in all language modes, since it seems generally useful. 411 Builder.defineMacro("__STDCPP_DEFAULT_NEW_ALIGNMENT__", 412 Twine(TI.getNewAlign() / TI.getCharWidth()) + 413 TI.getTypeConstantSuffix(TI.getSizeType())); 414 } 415 416 // In C11 these are environment macros. In C++11 they are only defined 417 // as part of <cuchar>. To prevent breakage when mixing C and C++ 418 // code, define these macros unconditionally. We can define them 419 // unconditionally, as Clang always uses UTF-16 and UTF-32 for 16-bit 420 // and 32-bit character literals. 421 Builder.defineMacro("__STDC_UTF_16__", "1"); 422 Builder.defineMacro("__STDC_UTF_32__", "1"); 423 424 if (LangOpts.ObjC1) 425 Builder.defineMacro("__OBJC__"); 426 427 // OpenCL v1.0/1.1 s6.9, v1.2/2.0 s6.10: Preprocessor Directives and Macros. 428 if (LangOpts.OpenCL) { 429 if (LangOpts.CPlusPlus) { 430 if (LangOpts.OpenCLCPlusPlusVersion == 100) 431 Builder.defineMacro("__OPENCL_CPP_VERSION__", "100"); 432 else 433 llvm_unreachable("Unsupported OpenCL C++ version"); 434 Builder.defineMacro("__CL_CPP_VERSION_1_0__", "100"); 435 } else { 436 // OpenCL v1.0 and v1.1 do not have a predefined macro to indicate the 437 // language standard with which the program is compiled. __OPENCL_VERSION__ 438 // is for the OpenCL version supported by the OpenCL device, which is not 439 // necessarily the language standard with which the program is compiled. 440 // A shared OpenCL header file requires a macro to indicate the language 441 // standard. As a workaround, __OPENCL_C_VERSION__ is defined for 442 // OpenCL v1.0 and v1.1. 443 switch (LangOpts.OpenCLVersion) { 444 case 100: 445 Builder.defineMacro("__OPENCL_C_VERSION__", "100"); 446 break; 447 case 110: 448 Builder.defineMacro("__OPENCL_C_VERSION__", "110"); 449 break; 450 case 120: 451 Builder.defineMacro("__OPENCL_C_VERSION__", "120"); 452 break; 453 case 200: 454 Builder.defineMacro("__OPENCL_C_VERSION__", "200"); 455 break; 456 default: 457 llvm_unreachable("Unsupported OpenCL version"); 458 } 459 Builder.defineMacro("CL_VERSION_1_0", "100"); 460 Builder.defineMacro("CL_VERSION_1_1", "110"); 461 Builder.defineMacro("CL_VERSION_1_2", "120"); 462 Builder.defineMacro("CL_VERSION_2_0", "200"); 463 464 if (TI.isLittleEndian()) 465 Builder.defineMacro("__ENDIAN_LITTLE__"); 466 467 if (LangOpts.FastRelaxedMath) 468 Builder.defineMacro("__FAST_RELAXED_MATH__"); 469 } 470 } 471 // Not "standard" per se, but available even with the -undef flag. 472 if (LangOpts.AsmPreprocessor) 473 Builder.defineMacro("__ASSEMBLER__"); 474 if (LangOpts.CUDA && !LangOpts.HIP) 475 Builder.defineMacro("__CUDA__"); 476 if (LangOpts.HIP) { 477 Builder.defineMacro("__HIP__"); 478 Builder.defineMacro("__HIPCC__"); 479 if (LangOpts.CUDAIsDevice) 480 Builder.defineMacro("__HIP_DEVICE_COMPILE__"); 481 } 482 } 483 484 /// Initialize the predefined C++ language feature test macros defined in 485 /// ISO/IEC JTC1/SC22/WG21 (C++) SD-6: "SG10 Feature Test Recommendations". 486 static void InitializeCPlusPlusFeatureTestMacros(const LangOptions &LangOpts, 487 MacroBuilder &Builder) { 488 // C++98 features. 489 if (LangOpts.RTTI) 490 Builder.defineMacro("__cpp_rtti", "199711"); 491 if (LangOpts.CXXExceptions) 492 Builder.defineMacro("__cpp_exceptions", "199711"); 493 494 // C++11 features. 495 if (LangOpts.CPlusPlus11) { 496 Builder.defineMacro("__cpp_unicode_characters", "200704"); 497 Builder.defineMacro("__cpp_raw_strings", "200710"); 498 Builder.defineMacro("__cpp_unicode_literals", "200710"); 499 Builder.defineMacro("__cpp_user_defined_literals", "200809"); 500 Builder.defineMacro("__cpp_lambdas", "200907"); 501 Builder.defineMacro("__cpp_constexpr", 502 LangOpts.CPlusPlus17 ? "201603" : 503 LangOpts.CPlusPlus14 ? "201304" : "200704"); 504 Builder.defineMacro("__cpp_range_based_for", 505 LangOpts.CPlusPlus17 ? "201603" : "200907"); 506 Builder.defineMacro("__cpp_static_assert", 507 LangOpts.CPlusPlus17 ? "201411" : "200410"); 508 Builder.defineMacro("__cpp_decltype", "200707"); 509 Builder.defineMacro("__cpp_attributes", "200809"); 510 Builder.defineMacro("__cpp_rvalue_references", "200610"); 511 Builder.defineMacro("__cpp_variadic_templates", "200704"); 512 Builder.defineMacro("__cpp_initializer_lists", "200806"); 513 Builder.defineMacro("__cpp_delegating_constructors", "200604"); 514 Builder.defineMacro("__cpp_nsdmi", "200809"); 515 Builder.defineMacro("__cpp_inheriting_constructors", "201511"); 516 Builder.defineMacro("__cpp_ref_qualifiers", "200710"); 517 Builder.defineMacro("__cpp_alias_templates", "200704"); 518 } 519 if (LangOpts.ThreadsafeStatics) 520 Builder.defineMacro("__cpp_threadsafe_static_init", "200806"); 521 522 // C++14 features. 523 if (LangOpts.CPlusPlus14) { 524 Builder.defineMacro("__cpp_binary_literals", "201304"); 525 Builder.defineMacro("__cpp_digit_separators", "201309"); 526 Builder.defineMacro("__cpp_init_captures", "201304"); 527 Builder.defineMacro("__cpp_generic_lambdas", "201304"); 528 Builder.defineMacro("__cpp_decltype_auto", "201304"); 529 Builder.defineMacro("__cpp_return_type_deduction", "201304"); 530 Builder.defineMacro("__cpp_aggregate_nsdmi", "201304"); 531 Builder.defineMacro("__cpp_variable_templates", "201304"); 532 } 533 if (LangOpts.SizedDeallocation) 534 Builder.defineMacro("__cpp_sized_deallocation", "201309"); 535 536 // C++17 features. 537 if (LangOpts.CPlusPlus17) { 538 Builder.defineMacro("__cpp_hex_float", "201603"); 539 Builder.defineMacro("__cpp_inline_variables", "201606"); 540 Builder.defineMacro("__cpp_noexcept_function_type", "201510"); 541 Builder.defineMacro("__cpp_capture_star_this", "201603"); 542 Builder.defineMacro("__cpp_if_constexpr", "201606"); 543 Builder.defineMacro("__cpp_deduction_guides", "201611"); 544 Builder.defineMacro("__cpp_template_auto", "201606"); 545 Builder.defineMacro("__cpp_namespace_attributes", "201411"); 546 Builder.defineMacro("__cpp_enumerator_attributes", "201411"); 547 Builder.defineMacro("__cpp_nested_namespace_definitions", "201411"); 548 Builder.defineMacro("__cpp_variadic_using", "201611"); 549 Builder.defineMacro("__cpp_aggregate_bases", "201603"); 550 Builder.defineMacro("__cpp_structured_bindings", "201606"); 551 Builder.defineMacro("__cpp_nontype_template_args", "201411"); 552 Builder.defineMacro("__cpp_fold_expressions", "201603"); 553 } 554 if (LangOpts.AlignedAllocation) 555 Builder.defineMacro("__cpp_aligned_new", "201606"); 556 557 // TS features. 558 if (LangOpts.ConceptsTS) 559 Builder.defineMacro("__cpp_experimental_concepts", "1"); 560 if (LangOpts.CoroutinesTS) 561 Builder.defineMacro("__cpp_coroutines", "201703L"); 562 } 563 564 static void InitializePredefinedMacros(const TargetInfo &TI, 565 const LangOptions &LangOpts, 566 const FrontendOptions &FEOpts, 567 MacroBuilder &Builder) { 568 // Compiler version introspection macros. 569 Builder.defineMacro("__llvm__"); // LLVM Backend 570 Builder.defineMacro("__clang__"); // Clang Frontend 571 #define TOSTR2(X) #X 572 #define TOSTR(X) TOSTR2(X) 573 Builder.defineMacro("__clang_major__", TOSTR(CLANG_VERSION_MAJOR)); 574 Builder.defineMacro("__clang_minor__", TOSTR(CLANG_VERSION_MINOR)); 575 Builder.defineMacro("__clang_patchlevel__", TOSTR(CLANG_VERSION_PATCHLEVEL)); 576 #undef TOSTR 577 #undef TOSTR2 578 Builder.defineMacro("__clang_version__", 579 "\"" CLANG_VERSION_STRING " " 580 + getClangFullRepositoryVersion() + "\""); 581 if (!LangOpts.MSVCCompat) { 582 // Currently claim to be compatible with GCC 4.2.1-5621, but only if we're 583 // not compiling for MSVC compatibility 584 Builder.defineMacro("__GNUC_MINOR__", "2"); 585 Builder.defineMacro("__GNUC_PATCHLEVEL__", "1"); 586 Builder.defineMacro("__GNUC__", "4"); 587 Builder.defineMacro("__GXX_ABI_VERSION", "1002"); 588 } 589 590 // Define macros for the C11 / C++11 memory orderings 591 Builder.defineMacro("__ATOMIC_RELAXED", "0"); 592 Builder.defineMacro("__ATOMIC_CONSUME", "1"); 593 Builder.defineMacro("__ATOMIC_ACQUIRE", "2"); 594 Builder.defineMacro("__ATOMIC_RELEASE", "3"); 595 Builder.defineMacro("__ATOMIC_ACQ_REL", "4"); 596 Builder.defineMacro("__ATOMIC_SEQ_CST", "5"); 597 598 // Define macros for the OpenCL memory scope. 599 // The values should match AtomicScopeOpenCLModel::ID enum. 600 static_assert( 601 static_cast<unsigned>(AtomicScopeOpenCLModel::WorkGroup) == 1 && 602 static_cast<unsigned>(AtomicScopeOpenCLModel::Device) == 2 && 603 static_cast<unsigned>(AtomicScopeOpenCLModel::AllSVMDevices) == 3 && 604 static_cast<unsigned>(AtomicScopeOpenCLModel::SubGroup) == 4, 605 "Invalid OpenCL memory scope enum definition"); 606 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_WORK_ITEM", "0"); 607 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_WORK_GROUP", "1"); 608 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_DEVICE", "2"); 609 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_ALL_SVM_DEVICES", "3"); 610 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_SUB_GROUP", "4"); 611 612 // Support for #pragma redefine_extname (Sun compatibility) 613 Builder.defineMacro("__PRAGMA_REDEFINE_EXTNAME", "1"); 614 615 // As sad as it is, enough software depends on the __VERSION__ for version 616 // checks that it is necessary to report 4.2.1 (the base GCC version we claim 617 // compatibility with) first. 618 Builder.defineMacro("__VERSION__", "\"4.2.1 Compatible " + 619 Twine(getClangFullCPPVersion()) + "\""); 620 621 // Initialize language-specific preprocessor defines. 622 623 // Standard conforming mode? 624 if (!LangOpts.GNUMode && !LangOpts.MSVCCompat) 625 Builder.defineMacro("__STRICT_ANSI__"); 626 627 if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus11) 628 Builder.defineMacro("__GXX_EXPERIMENTAL_CXX0X__"); 629 630 if (LangOpts.ObjC1) { 631 if (LangOpts.ObjCRuntime.isNonFragile()) { 632 Builder.defineMacro("__OBJC2__"); 633 634 if (LangOpts.ObjCExceptions) 635 Builder.defineMacro("OBJC_ZEROCOST_EXCEPTIONS"); 636 } 637 638 if (LangOpts.getGC() != LangOptions::NonGC) 639 Builder.defineMacro("__OBJC_GC__"); 640 641 if (LangOpts.ObjCRuntime.isNeXTFamily()) 642 Builder.defineMacro("__NEXT_RUNTIME__"); 643 644 if (LangOpts.ObjCRuntime.getKind() == ObjCRuntime::ObjFW) { 645 VersionTuple tuple = LangOpts.ObjCRuntime.getVersion(); 646 647 unsigned minor = 0; 648 if (tuple.getMinor().hasValue()) 649 minor = tuple.getMinor().getValue(); 650 651 unsigned subminor = 0; 652 if (tuple.getSubminor().hasValue()) 653 subminor = tuple.getSubminor().getValue(); 654 655 Builder.defineMacro("__OBJFW_RUNTIME_ABI__", 656 Twine(tuple.getMajor() * 10000 + minor * 100 + 657 subminor)); 658 } 659 660 Builder.defineMacro("IBOutlet", "__attribute__((iboutlet))"); 661 Builder.defineMacro("IBOutletCollection(ClassName)", 662 "__attribute__((iboutletcollection(ClassName)))"); 663 Builder.defineMacro("IBAction", "void)__attribute__((ibaction)"); 664 Builder.defineMacro("IBInspectable", ""); 665 Builder.defineMacro("IB_DESIGNABLE", ""); 666 } 667 668 // Define a macro that describes the Objective-C boolean type even for C 669 // and C++ since BOOL can be used from non Objective-C code. 670 Builder.defineMacro("__OBJC_BOOL_IS_BOOL", 671 Twine(TI.useSignedCharForObjCBool() ? "0" : "1")); 672 673 if (LangOpts.CPlusPlus) 674 InitializeCPlusPlusFeatureTestMacros(LangOpts, Builder); 675 676 // darwin_constant_cfstrings controls this. This is also dependent 677 // on other things like the runtime I believe. This is set even for C code. 678 if (!LangOpts.NoConstantCFStrings) 679 Builder.defineMacro("__CONSTANT_CFSTRINGS__"); 680 681 if (LangOpts.ObjC2) 682 Builder.defineMacro("OBJC_NEW_PROPERTIES"); 683 684 if (LangOpts.PascalStrings) 685 Builder.defineMacro("__PASCAL_STRINGS__"); 686 687 if (LangOpts.Blocks) { 688 Builder.defineMacro("__block", "__attribute__((__blocks__(byref)))"); 689 Builder.defineMacro("__BLOCKS__"); 690 } 691 692 if (!LangOpts.MSVCCompat && LangOpts.Exceptions) 693 Builder.defineMacro("__EXCEPTIONS"); 694 if (!LangOpts.MSVCCompat && LangOpts.RTTI) 695 Builder.defineMacro("__GXX_RTTI"); 696 697 if (LangOpts.SjLjExceptions) 698 Builder.defineMacro("__USING_SJLJ_EXCEPTIONS__"); 699 else if (LangOpts.SEHExceptions) 700 Builder.defineMacro("__SEH__"); 701 else if (LangOpts.DWARFExceptions && 702 (TI.getTriple().isThumb() || TI.getTriple().isARM())) 703 Builder.defineMacro("__ARM_DWARF_EH__"); 704 705 if (LangOpts.Deprecated) 706 Builder.defineMacro("__DEPRECATED"); 707 708 if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus) { 709 Builder.defineMacro("__GNUG__", "4"); 710 Builder.defineMacro("__GXX_WEAK__"); 711 Builder.defineMacro("__private_extern__", "extern"); 712 } 713 714 if (LangOpts.MicrosoftExt) { 715 if (LangOpts.WChar) { 716 // wchar_t supported as a keyword. 717 Builder.defineMacro("_WCHAR_T_DEFINED"); 718 Builder.defineMacro("_NATIVE_WCHAR_T_DEFINED"); 719 } 720 } 721 722 if (LangOpts.Optimize) 723 Builder.defineMacro("__OPTIMIZE__"); 724 if (LangOpts.OptimizeSize) 725 Builder.defineMacro("__OPTIMIZE_SIZE__"); 726 727 if (LangOpts.FastMath) 728 Builder.defineMacro("__FAST_MATH__"); 729 730 // Initialize target-specific preprocessor defines. 731 732 // __BYTE_ORDER__ was added in GCC 4.6. It's analogous 733 // to the macro __BYTE_ORDER (no trailing underscores) 734 // from glibc's <endian.h> header. 735 // We don't support the PDP-11 as a target, but include 736 // the define so it can still be compared against. 737 Builder.defineMacro("__ORDER_LITTLE_ENDIAN__", "1234"); 738 Builder.defineMacro("__ORDER_BIG_ENDIAN__", "4321"); 739 Builder.defineMacro("__ORDER_PDP_ENDIAN__", "3412"); 740 if (TI.isBigEndian()) { 741 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_BIG_ENDIAN__"); 742 Builder.defineMacro("__BIG_ENDIAN__"); 743 } else { 744 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_LITTLE_ENDIAN__"); 745 Builder.defineMacro("__LITTLE_ENDIAN__"); 746 } 747 748 if (TI.getPointerWidth(0) == 64 && TI.getLongWidth() == 64 749 && TI.getIntWidth() == 32) { 750 Builder.defineMacro("_LP64"); 751 Builder.defineMacro("__LP64__"); 752 } 753 754 if (TI.getPointerWidth(0) == 32 && TI.getLongWidth() == 32 755 && TI.getIntWidth() == 32) { 756 Builder.defineMacro("_ILP32"); 757 Builder.defineMacro("__ILP32__"); 758 } 759 760 // Define type sizing macros based on the target properties. 761 assert(TI.getCharWidth() == 8 && "Only support 8-bit char so far"); 762 Builder.defineMacro("__CHAR_BIT__", Twine(TI.getCharWidth())); 763 764 DefineTypeSize("__SCHAR_MAX__", TargetInfo::SignedChar, TI, Builder); 765 DefineTypeSize("__SHRT_MAX__", TargetInfo::SignedShort, TI, Builder); 766 DefineTypeSize("__INT_MAX__", TargetInfo::SignedInt, TI, Builder); 767 DefineTypeSize("__LONG_MAX__", TargetInfo::SignedLong, TI, Builder); 768 DefineTypeSize("__LONG_LONG_MAX__", TargetInfo::SignedLongLong, TI, Builder); 769 DefineTypeSize("__WCHAR_MAX__", TI.getWCharType(), TI, Builder); 770 DefineTypeSize("__WINT_MAX__", TI.getWIntType(), TI, Builder); 771 DefineTypeSize("__INTMAX_MAX__", TI.getIntMaxType(), TI, Builder); 772 DefineTypeSize("__SIZE_MAX__", TI.getSizeType(), TI, Builder); 773 774 DefineTypeSize("__UINTMAX_MAX__", TI.getUIntMaxType(), TI, Builder); 775 DefineTypeSize("__PTRDIFF_MAX__", TI.getPtrDiffType(0), TI, Builder); 776 DefineTypeSize("__INTPTR_MAX__", TI.getIntPtrType(), TI, Builder); 777 DefineTypeSize("__UINTPTR_MAX__", TI.getUIntPtrType(), TI, Builder); 778 779 DefineTypeSizeof("__SIZEOF_DOUBLE__", TI.getDoubleWidth(), TI, Builder); 780 DefineTypeSizeof("__SIZEOF_FLOAT__", TI.getFloatWidth(), TI, Builder); 781 DefineTypeSizeof("__SIZEOF_INT__", TI.getIntWidth(), TI, Builder); 782 DefineTypeSizeof("__SIZEOF_LONG__", TI.getLongWidth(), TI, Builder); 783 DefineTypeSizeof("__SIZEOF_LONG_DOUBLE__",TI.getLongDoubleWidth(),TI,Builder); 784 DefineTypeSizeof("__SIZEOF_LONG_LONG__", TI.getLongLongWidth(), TI, Builder); 785 DefineTypeSizeof("__SIZEOF_POINTER__", TI.getPointerWidth(0), TI, Builder); 786 DefineTypeSizeof("__SIZEOF_SHORT__", TI.getShortWidth(), TI, Builder); 787 DefineTypeSizeof("__SIZEOF_PTRDIFF_T__", 788 TI.getTypeWidth(TI.getPtrDiffType(0)), TI, Builder); 789 DefineTypeSizeof("__SIZEOF_SIZE_T__", 790 TI.getTypeWidth(TI.getSizeType()), TI, Builder); 791 DefineTypeSizeof("__SIZEOF_WCHAR_T__", 792 TI.getTypeWidth(TI.getWCharType()), TI, Builder); 793 DefineTypeSizeof("__SIZEOF_WINT_T__", 794 TI.getTypeWidth(TI.getWIntType()), TI, Builder); 795 if (TI.hasInt128Type()) 796 DefineTypeSizeof("__SIZEOF_INT128__", 128, TI, Builder); 797 798 DefineType("__INTMAX_TYPE__", TI.getIntMaxType(), Builder); 799 DefineFmt("__INTMAX", TI.getIntMaxType(), TI, Builder); 800 Builder.defineMacro("__INTMAX_C_SUFFIX__", 801 TI.getTypeConstantSuffix(TI.getIntMaxType())); 802 DefineType("__UINTMAX_TYPE__", TI.getUIntMaxType(), Builder); 803 DefineFmt("__UINTMAX", TI.getUIntMaxType(), TI, Builder); 804 Builder.defineMacro("__UINTMAX_C_SUFFIX__", 805 TI.getTypeConstantSuffix(TI.getUIntMaxType())); 806 DefineTypeWidth("__INTMAX_WIDTH__", TI.getIntMaxType(), TI, Builder); 807 DefineType("__PTRDIFF_TYPE__", TI.getPtrDiffType(0), Builder); 808 DefineFmt("__PTRDIFF", TI.getPtrDiffType(0), TI, Builder); 809 DefineTypeWidth("__PTRDIFF_WIDTH__", TI.getPtrDiffType(0), TI, Builder); 810 DefineType("__INTPTR_TYPE__", TI.getIntPtrType(), Builder); 811 DefineFmt("__INTPTR", TI.getIntPtrType(), TI, Builder); 812 DefineTypeWidth("__INTPTR_WIDTH__", TI.getIntPtrType(), TI, Builder); 813 DefineType("__SIZE_TYPE__", TI.getSizeType(), Builder); 814 DefineFmt("__SIZE", TI.getSizeType(), TI, Builder); 815 DefineTypeWidth("__SIZE_WIDTH__", TI.getSizeType(), TI, Builder); 816 DefineType("__WCHAR_TYPE__", TI.getWCharType(), Builder); 817 DefineTypeWidth("__WCHAR_WIDTH__", TI.getWCharType(), TI, Builder); 818 DefineType("__WINT_TYPE__", TI.getWIntType(), Builder); 819 DefineTypeWidth("__WINT_WIDTH__", TI.getWIntType(), TI, Builder); 820 DefineTypeWidth("__SIG_ATOMIC_WIDTH__", TI.getSigAtomicType(), TI, Builder); 821 DefineTypeSize("__SIG_ATOMIC_MAX__", TI.getSigAtomicType(), TI, Builder); 822 DefineType("__CHAR16_TYPE__", TI.getChar16Type(), Builder); 823 DefineType("__CHAR32_TYPE__", TI.getChar32Type(), Builder); 824 825 DefineTypeWidth("__UINTMAX_WIDTH__", TI.getUIntMaxType(), TI, Builder); 826 DefineType("__UINTPTR_TYPE__", TI.getUIntPtrType(), Builder); 827 DefineFmt("__UINTPTR", TI.getUIntPtrType(), TI, Builder); 828 DefineTypeWidth("__UINTPTR_WIDTH__", TI.getUIntPtrType(), TI, Builder); 829 830 DefineFloatMacros(Builder, "FLT16", &TI.getHalfFormat(), "F16"); 831 DefineFloatMacros(Builder, "FLT", &TI.getFloatFormat(), "F"); 832 DefineFloatMacros(Builder, "DBL", &TI.getDoubleFormat(), ""); 833 DefineFloatMacros(Builder, "LDBL", &TI.getLongDoubleFormat(), "L"); 834 835 // Define a __POINTER_WIDTH__ macro for stdint.h. 836 Builder.defineMacro("__POINTER_WIDTH__", 837 Twine((int)TI.getPointerWidth(0))); 838 839 // Define __BIGGEST_ALIGNMENT__ to be compatible with gcc. 840 Builder.defineMacro("__BIGGEST_ALIGNMENT__", 841 Twine(TI.getSuitableAlign() / TI.getCharWidth()) ); 842 843 if (!LangOpts.CharIsSigned) 844 Builder.defineMacro("__CHAR_UNSIGNED__"); 845 846 if (!TargetInfo::isTypeSigned(TI.getWCharType())) 847 Builder.defineMacro("__WCHAR_UNSIGNED__"); 848 849 if (!TargetInfo::isTypeSigned(TI.getWIntType())) 850 Builder.defineMacro("__WINT_UNSIGNED__"); 851 852 // Define exact-width integer types for stdint.h 853 DefineExactWidthIntType(TargetInfo::SignedChar, TI, Builder); 854 855 if (TI.getShortWidth() > TI.getCharWidth()) 856 DefineExactWidthIntType(TargetInfo::SignedShort, TI, Builder); 857 858 if (TI.getIntWidth() > TI.getShortWidth()) 859 DefineExactWidthIntType(TargetInfo::SignedInt, TI, Builder); 860 861 if (TI.getLongWidth() > TI.getIntWidth()) 862 DefineExactWidthIntType(TargetInfo::SignedLong, TI, Builder); 863 864 if (TI.getLongLongWidth() > TI.getLongWidth()) 865 DefineExactWidthIntType(TargetInfo::SignedLongLong, TI, Builder); 866 867 DefineExactWidthIntType(TargetInfo::UnsignedChar, TI, Builder); 868 DefineExactWidthIntTypeSize(TargetInfo::UnsignedChar, TI, Builder); 869 DefineExactWidthIntTypeSize(TargetInfo::SignedChar, TI, Builder); 870 871 if (TI.getShortWidth() > TI.getCharWidth()) { 872 DefineExactWidthIntType(TargetInfo::UnsignedShort, TI, Builder); 873 DefineExactWidthIntTypeSize(TargetInfo::UnsignedShort, TI, Builder); 874 DefineExactWidthIntTypeSize(TargetInfo::SignedShort, TI, Builder); 875 } 876 877 if (TI.getIntWidth() > TI.getShortWidth()) { 878 DefineExactWidthIntType(TargetInfo::UnsignedInt, TI, Builder); 879 DefineExactWidthIntTypeSize(TargetInfo::UnsignedInt, TI, Builder); 880 DefineExactWidthIntTypeSize(TargetInfo::SignedInt, TI, Builder); 881 } 882 883 if (TI.getLongWidth() > TI.getIntWidth()) { 884 DefineExactWidthIntType(TargetInfo::UnsignedLong, TI, Builder); 885 DefineExactWidthIntTypeSize(TargetInfo::UnsignedLong, TI, Builder); 886 DefineExactWidthIntTypeSize(TargetInfo::SignedLong, TI, Builder); 887 } 888 889 if (TI.getLongLongWidth() > TI.getLongWidth()) { 890 DefineExactWidthIntType(TargetInfo::UnsignedLongLong, TI, Builder); 891 DefineExactWidthIntTypeSize(TargetInfo::UnsignedLongLong, TI, Builder); 892 DefineExactWidthIntTypeSize(TargetInfo::SignedLongLong, TI, Builder); 893 } 894 895 DefineLeastWidthIntType(8, true, TI, Builder); 896 DefineLeastWidthIntType(8, false, TI, Builder); 897 DefineLeastWidthIntType(16, true, TI, Builder); 898 DefineLeastWidthIntType(16, false, TI, Builder); 899 DefineLeastWidthIntType(32, true, TI, Builder); 900 DefineLeastWidthIntType(32, false, TI, Builder); 901 DefineLeastWidthIntType(64, true, TI, Builder); 902 DefineLeastWidthIntType(64, false, TI, Builder); 903 904 DefineFastIntType(8, true, TI, Builder); 905 DefineFastIntType(8, false, TI, Builder); 906 DefineFastIntType(16, true, TI, Builder); 907 DefineFastIntType(16, false, TI, Builder); 908 DefineFastIntType(32, true, TI, Builder); 909 DefineFastIntType(32, false, TI, Builder); 910 DefineFastIntType(64, true, TI, Builder); 911 DefineFastIntType(64, false, TI, Builder); 912 913 char UserLabelPrefix[2] = {TI.getDataLayout().getGlobalPrefix(), 0}; 914 Builder.defineMacro("__USER_LABEL_PREFIX__", UserLabelPrefix); 915 916 if (LangOpts.FastMath || LangOpts.FiniteMathOnly) 917 Builder.defineMacro("__FINITE_MATH_ONLY__", "1"); 918 else 919 Builder.defineMacro("__FINITE_MATH_ONLY__", "0"); 920 921 if (!LangOpts.MSVCCompat) { 922 if (LangOpts.GNUInline || LangOpts.CPlusPlus) 923 Builder.defineMacro("__GNUC_GNU_INLINE__"); 924 else 925 Builder.defineMacro("__GNUC_STDC_INLINE__"); 926 927 // The value written by __atomic_test_and_set. 928 // FIXME: This is target-dependent. 929 Builder.defineMacro("__GCC_ATOMIC_TEST_AND_SET_TRUEVAL", "1"); 930 } 931 932 auto addLockFreeMacros = [&](const llvm::Twine &Prefix) { 933 // Used by libc++ and libstdc++ to implement ATOMIC_<foo>_LOCK_FREE. 934 unsigned InlineWidthBits = TI.getMaxAtomicInlineWidth(); 935 #define DEFINE_LOCK_FREE_MACRO(TYPE, Type) \ 936 Builder.defineMacro(Prefix + #TYPE "_LOCK_FREE", \ 937 getLockFreeValue(TI.get##Type##Width(), \ 938 TI.get##Type##Align(), \ 939 InlineWidthBits)); 940 DEFINE_LOCK_FREE_MACRO(BOOL, Bool); 941 DEFINE_LOCK_FREE_MACRO(CHAR, Char); 942 DEFINE_LOCK_FREE_MACRO(CHAR16_T, Char16); 943 DEFINE_LOCK_FREE_MACRO(CHAR32_T, Char32); 944 DEFINE_LOCK_FREE_MACRO(WCHAR_T, WChar); 945 DEFINE_LOCK_FREE_MACRO(SHORT, Short); 946 DEFINE_LOCK_FREE_MACRO(INT, Int); 947 DEFINE_LOCK_FREE_MACRO(LONG, Long); 948 DEFINE_LOCK_FREE_MACRO(LLONG, LongLong); 949 Builder.defineMacro(Prefix + "POINTER_LOCK_FREE", 950 getLockFreeValue(TI.getPointerWidth(0), 951 TI.getPointerAlign(0), 952 InlineWidthBits)); 953 #undef DEFINE_LOCK_FREE_MACRO 954 }; 955 addLockFreeMacros("__CLANG_ATOMIC_"); 956 if (!LangOpts.MSVCCompat) 957 addLockFreeMacros("__GCC_ATOMIC_"); 958 959 if (LangOpts.NoInlineDefine) 960 Builder.defineMacro("__NO_INLINE__"); 961 962 if (unsigned PICLevel = LangOpts.PICLevel) { 963 Builder.defineMacro("__PIC__", Twine(PICLevel)); 964 Builder.defineMacro("__pic__", Twine(PICLevel)); 965 if (LangOpts.PIE) { 966 Builder.defineMacro("__PIE__", Twine(PICLevel)); 967 Builder.defineMacro("__pie__", Twine(PICLevel)); 968 } 969 } 970 971 // Macros to control C99 numerics and <float.h> 972 Builder.defineMacro("__FLT_EVAL_METHOD__", Twine(TI.getFloatEvalMethod())); 973 Builder.defineMacro("__FLT_RADIX__", "2"); 974 Builder.defineMacro("__DECIMAL_DIG__", "__LDBL_DECIMAL_DIG__"); 975 976 if (LangOpts.getStackProtector() == LangOptions::SSPOn) 977 Builder.defineMacro("__SSP__"); 978 else if (LangOpts.getStackProtector() == LangOptions::SSPStrong) 979 Builder.defineMacro("__SSP_STRONG__", "2"); 980 else if (LangOpts.getStackProtector() == LangOptions::SSPReq) 981 Builder.defineMacro("__SSP_ALL__", "3"); 982 983 // Define a macro that exists only when using the static analyzer. 984 if (FEOpts.ProgramAction == frontend::RunAnalysis) 985 Builder.defineMacro("__clang_analyzer__"); 986 987 if (LangOpts.FastRelaxedMath) 988 Builder.defineMacro("__FAST_RELAXED_MATH__"); 989 990 if (FEOpts.ProgramAction == frontend::RewriteObjC || 991 LangOpts.getGC() != LangOptions::NonGC) { 992 Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))"); 993 Builder.defineMacro("__strong", "__attribute__((objc_gc(strong)))"); 994 Builder.defineMacro("__autoreleasing", ""); 995 Builder.defineMacro("__unsafe_unretained", ""); 996 } else if (LangOpts.ObjC1) { 997 Builder.defineMacro("__weak", "__attribute__((objc_ownership(weak)))"); 998 Builder.defineMacro("__strong", "__attribute__((objc_ownership(strong)))"); 999 Builder.defineMacro("__autoreleasing", 1000 "__attribute__((objc_ownership(autoreleasing)))"); 1001 Builder.defineMacro("__unsafe_unretained", 1002 "__attribute__((objc_ownership(none)))"); 1003 } 1004 1005 // On Darwin, there are __double_underscored variants of the type 1006 // nullability qualifiers. 1007 if (TI.getTriple().isOSDarwin()) { 1008 Builder.defineMacro("__nonnull", "_Nonnull"); 1009 Builder.defineMacro("__null_unspecified", "_Null_unspecified"); 1010 Builder.defineMacro("__nullable", "_Nullable"); 1011 } 1012 1013 // Add a macro to differentiate between regular iOS/tvOS/watchOS targets and 1014 // the corresponding simulator targets. 1015 if (TI.getTriple().isOSDarwin() && TI.getTriple().isSimulatorEnvironment()) 1016 Builder.defineMacro("__APPLE_EMBEDDED_SIMULATOR__", "1"); 1017 1018 // OpenMP definition 1019 // OpenMP 2.2: 1020 // In implementations that support a preprocessor, the _OPENMP 1021 // macro name is defined to have the decimal value yyyymm where 1022 // yyyy and mm are the year and the month designations of the 1023 // version of the OpenMP API that the implementation support. 1024 switch (LangOpts.OpenMP) { 1025 case 0: 1026 break; 1027 case 40: 1028 Builder.defineMacro("_OPENMP", "201307"); 1029 break; 1030 case 45: 1031 Builder.defineMacro("_OPENMP", "201511"); 1032 break; 1033 default: 1034 // Default version is OpenMP 3.1, in Simd only mode - 4.5 1035 Builder.defineMacro("_OPENMP", LangOpts.OpenMPSimd ? "201511" : "201107"); 1036 break; 1037 } 1038 1039 // CUDA device path compilaton 1040 if (LangOpts.CUDAIsDevice && !LangOpts.HIP) { 1041 // The CUDA_ARCH value is set for the GPU target specified in the NVPTX 1042 // backend's target defines. 1043 Builder.defineMacro("__CUDA_ARCH__"); 1044 } 1045 1046 // We need to communicate this to our CUDA header wrapper, which in turn 1047 // informs the proper CUDA headers of this choice. 1048 if (LangOpts.CUDADeviceApproxTranscendentals || LangOpts.FastMath) { 1049 Builder.defineMacro("__CLANG_CUDA_APPROX_TRANSCENDENTALS__"); 1050 } 1051 1052 // OpenCL definitions. 1053 if (LangOpts.OpenCL) { 1054 #define OPENCLEXT(Ext) \ 1055 if (TI.getSupportedOpenCLOpts().isSupported(#Ext, \ 1056 LangOpts.OpenCLVersion)) \ 1057 Builder.defineMacro(#Ext); 1058 #include "clang/Basic/OpenCLExtensions.def" 1059 1060 auto Arch = TI.getTriple().getArch(); 1061 if (Arch == llvm::Triple::spir || Arch == llvm::Triple::spir64) 1062 Builder.defineMacro("__IMAGE_SUPPORT__"); 1063 } 1064 1065 if (TI.hasInt128Type() && LangOpts.CPlusPlus && LangOpts.GNUMode) { 1066 // For each extended integer type, g++ defines a macro mapping the 1067 // index of the type (0 in this case) in some list of extended types 1068 // to the type. 1069 Builder.defineMacro("__GLIBCXX_TYPE_INT_N_0", "__int128"); 1070 Builder.defineMacro("__GLIBCXX_BITSIZE_INT_N_0", "128"); 1071 } 1072 1073 // Get other target #defines. 1074 TI.getTargetDefines(LangOpts, Builder); 1075 } 1076 1077 /// InitializePreprocessor - Initialize the preprocessor getting it and the 1078 /// environment ready to process a single file. This returns true on error. 1079 /// 1080 void clang::InitializePreprocessor( 1081 Preprocessor &PP, const PreprocessorOptions &InitOpts, 1082 const PCHContainerReader &PCHContainerRdr, 1083 const FrontendOptions &FEOpts) { 1084 const LangOptions &LangOpts = PP.getLangOpts(); 1085 std::string PredefineBuffer; 1086 PredefineBuffer.reserve(4080); 1087 llvm::raw_string_ostream Predefines(PredefineBuffer); 1088 MacroBuilder Builder(Predefines); 1089 1090 // Emit line markers for various builtin sections of the file. We don't do 1091 // this in asm preprocessor mode, because "# 4" is not a line marker directive 1092 // in this mode. 1093 if (!PP.getLangOpts().AsmPreprocessor) 1094 Builder.append("# 1 \"<built-in>\" 3"); 1095 1096 // Install things like __POWERPC__, __GNUC__, etc into the macro table. 1097 if (InitOpts.UsePredefines) { 1098 // FIXME: This will create multiple definitions for most of the predefined 1099 // macros. This is not the right way to handle this. 1100 if ((LangOpts.CUDA || LangOpts.OpenMPIsDevice) && PP.getAuxTargetInfo()) 1101 InitializePredefinedMacros(*PP.getAuxTargetInfo(), LangOpts, FEOpts, 1102 Builder); 1103 1104 InitializePredefinedMacros(PP.getTargetInfo(), LangOpts, FEOpts, Builder); 1105 1106 // Install definitions to make Objective-C++ ARC work well with various 1107 // C++ Standard Library implementations. 1108 if (LangOpts.ObjC1 && LangOpts.CPlusPlus && 1109 (LangOpts.ObjCAutoRefCount || LangOpts.ObjCWeak)) { 1110 switch (InitOpts.ObjCXXARCStandardLibrary) { 1111 case ARCXX_nolib: 1112 case ARCXX_libcxx: 1113 break; 1114 1115 case ARCXX_libstdcxx: 1116 AddObjCXXARCLibstdcxxDefines(LangOpts, Builder); 1117 break; 1118 } 1119 } 1120 } 1121 1122 // Even with predefines off, some macros are still predefined. 1123 // These should all be defined in the preprocessor according to the 1124 // current language configuration. 1125 InitializeStandardPredefinedMacros(PP.getTargetInfo(), PP.getLangOpts(), 1126 FEOpts, Builder); 1127 1128 // Add on the predefines from the driver. Wrap in a #line directive to report 1129 // that they come from the command line. 1130 if (!PP.getLangOpts().AsmPreprocessor) 1131 Builder.append("# 1 \"<command line>\" 1"); 1132 1133 // Process #define's and #undef's in the order they are given. 1134 for (unsigned i = 0, e = InitOpts.Macros.size(); i != e; ++i) { 1135 if (InitOpts.Macros[i].second) // isUndef 1136 Builder.undefineMacro(InitOpts.Macros[i].first); 1137 else 1138 DefineBuiltinMacro(Builder, InitOpts.Macros[i].first, 1139 PP.getDiagnostics()); 1140 } 1141 1142 // Exit the command line and go back to <built-in> (2 is LC_LEAVE). 1143 if (!PP.getLangOpts().AsmPreprocessor) 1144 Builder.append("# 1 \"<built-in>\" 2"); 1145 1146 // If -imacros are specified, include them now. These are processed before 1147 // any -include directives. 1148 for (unsigned i = 0, e = InitOpts.MacroIncludes.size(); i != e; ++i) 1149 AddImplicitIncludeMacros(Builder, InitOpts.MacroIncludes[i]); 1150 1151 // Process -include-pch/-include-pth directives. 1152 if (!InitOpts.ImplicitPCHInclude.empty()) 1153 AddImplicitIncludePCH(Builder, PP, PCHContainerRdr, 1154 InitOpts.ImplicitPCHInclude); 1155 if (!InitOpts.ImplicitPTHInclude.empty()) 1156 AddImplicitIncludePTH(Builder, PP, InitOpts.ImplicitPTHInclude); 1157 1158 // Process -include directives. 1159 for (unsigned i = 0, e = InitOpts.Includes.size(); i != e; ++i) { 1160 const std::string &Path = InitOpts.Includes[i]; 1161 AddImplicitInclude(Builder, Path); 1162 } 1163 1164 // Instruct the preprocessor to skip the preamble. 1165 PP.setSkipMainFilePreamble(InitOpts.PrecompiledPreambleBytes.first, 1166 InitOpts.PrecompiledPreambleBytes.second); 1167 1168 // Copy PredefinedBuffer into the Preprocessor. 1169 PP.setPredefines(Predefines.str()); 1170 } 1171