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 // Potential future breaking changes. 564 if (LangOpts.Char8) 565 Builder.defineMacro("__cpp_char8_t", "201803"); 566 } 567 568 static void InitializePredefinedMacros(const TargetInfo &TI, 569 const LangOptions &LangOpts, 570 const FrontendOptions &FEOpts, 571 MacroBuilder &Builder) { 572 // Compiler version introspection macros. 573 Builder.defineMacro("__llvm__"); // LLVM Backend 574 Builder.defineMacro("__clang__"); // Clang Frontend 575 #define TOSTR2(X) #X 576 #define TOSTR(X) TOSTR2(X) 577 Builder.defineMacro("__clang_major__", TOSTR(CLANG_VERSION_MAJOR)); 578 Builder.defineMacro("__clang_minor__", TOSTR(CLANG_VERSION_MINOR)); 579 Builder.defineMacro("__clang_patchlevel__", TOSTR(CLANG_VERSION_PATCHLEVEL)); 580 #undef TOSTR 581 #undef TOSTR2 582 Builder.defineMacro("__clang_version__", 583 "\"" CLANG_VERSION_STRING " " 584 + getClangFullRepositoryVersion() + "\""); 585 if (!LangOpts.MSVCCompat) { 586 // Currently claim to be compatible with GCC 4.2.1-5621, but only if we're 587 // not compiling for MSVC compatibility 588 Builder.defineMacro("__GNUC_MINOR__", "2"); 589 Builder.defineMacro("__GNUC_PATCHLEVEL__", "1"); 590 Builder.defineMacro("__GNUC__", "4"); 591 Builder.defineMacro("__GXX_ABI_VERSION", "1002"); 592 } 593 594 // Define macros for the C11 / C++11 memory orderings 595 Builder.defineMacro("__ATOMIC_RELAXED", "0"); 596 Builder.defineMacro("__ATOMIC_CONSUME", "1"); 597 Builder.defineMacro("__ATOMIC_ACQUIRE", "2"); 598 Builder.defineMacro("__ATOMIC_RELEASE", "3"); 599 Builder.defineMacro("__ATOMIC_ACQ_REL", "4"); 600 Builder.defineMacro("__ATOMIC_SEQ_CST", "5"); 601 602 // Define macros for the OpenCL memory scope. 603 // The values should match AtomicScopeOpenCLModel::ID enum. 604 static_assert( 605 static_cast<unsigned>(AtomicScopeOpenCLModel::WorkGroup) == 1 && 606 static_cast<unsigned>(AtomicScopeOpenCLModel::Device) == 2 && 607 static_cast<unsigned>(AtomicScopeOpenCLModel::AllSVMDevices) == 3 && 608 static_cast<unsigned>(AtomicScopeOpenCLModel::SubGroup) == 4, 609 "Invalid OpenCL memory scope enum definition"); 610 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_WORK_ITEM", "0"); 611 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_WORK_GROUP", "1"); 612 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_DEVICE", "2"); 613 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_ALL_SVM_DEVICES", "3"); 614 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_SUB_GROUP", "4"); 615 616 // Support for #pragma redefine_extname (Sun compatibility) 617 Builder.defineMacro("__PRAGMA_REDEFINE_EXTNAME", "1"); 618 619 // As sad as it is, enough software depends on the __VERSION__ for version 620 // checks that it is necessary to report 4.2.1 (the base GCC version we claim 621 // compatibility with) first. 622 Builder.defineMacro("__VERSION__", "\"4.2.1 Compatible " + 623 Twine(getClangFullCPPVersion()) + "\""); 624 625 // Initialize language-specific preprocessor defines. 626 627 // Standard conforming mode? 628 if (!LangOpts.GNUMode && !LangOpts.MSVCCompat) 629 Builder.defineMacro("__STRICT_ANSI__"); 630 631 if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus11) 632 Builder.defineMacro("__GXX_EXPERIMENTAL_CXX0X__"); 633 634 if (LangOpts.ObjC1) { 635 if (LangOpts.ObjCRuntime.isNonFragile()) { 636 Builder.defineMacro("__OBJC2__"); 637 638 if (LangOpts.ObjCExceptions) 639 Builder.defineMacro("OBJC_ZEROCOST_EXCEPTIONS"); 640 } 641 642 if (LangOpts.getGC() != LangOptions::NonGC) 643 Builder.defineMacro("__OBJC_GC__"); 644 645 if (LangOpts.ObjCRuntime.isNeXTFamily()) 646 Builder.defineMacro("__NEXT_RUNTIME__"); 647 648 if (LangOpts.ObjCRuntime.getKind() == ObjCRuntime::ObjFW) { 649 VersionTuple tuple = LangOpts.ObjCRuntime.getVersion(); 650 651 unsigned minor = 0; 652 if (tuple.getMinor().hasValue()) 653 minor = tuple.getMinor().getValue(); 654 655 unsigned subminor = 0; 656 if (tuple.getSubminor().hasValue()) 657 subminor = tuple.getSubminor().getValue(); 658 659 Builder.defineMacro("__OBJFW_RUNTIME_ABI__", 660 Twine(tuple.getMajor() * 10000 + minor * 100 + 661 subminor)); 662 } 663 664 Builder.defineMacro("IBOutlet", "__attribute__((iboutlet))"); 665 Builder.defineMacro("IBOutletCollection(ClassName)", 666 "__attribute__((iboutletcollection(ClassName)))"); 667 Builder.defineMacro("IBAction", "void)__attribute__((ibaction)"); 668 Builder.defineMacro("IBInspectable", ""); 669 Builder.defineMacro("IB_DESIGNABLE", ""); 670 } 671 672 // Define a macro that describes the Objective-C boolean type even for C 673 // and C++ since BOOL can be used from non Objective-C code. 674 Builder.defineMacro("__OBJC_BOOL_IS_BOOL", 675 Twine(TI.useSignedCharForObjCBool() ? "0" : "1")); 676 677 if (LangOpts.CPlusPlus) 678 InitializeCPlusPlusFeatureTestMacros(LangOpts, Builder); 679 680 // darwin_constant_cfstrings controls this. This is also dependent 681 // on other things like the runtime I believe. This is set even for C code. 682 if (!LangOpts.NoConstantCFStrings) 683 Builder.defineMacro("__CONSTANT_CFSTRINGS__"); 684 685 if (LangOpts.ObjC2) 686 Builder.defineMacro("OBJC_NEW_PROPERTIES"); 687 688 if (LangOpts.PascalStrings) 689 Builder.defineMacro("__PASCAL_STRINGS__"); 690 691 if (LangOpts.Blocks) { 692 Builder.defineMacro("__block", "__attribute__((__blocks__(byref)))"); 693 Builder.defineMacro("__BLOCKS__"); 694 } 695 696 if (!LangOpts.MSVCCompat && LangOpts.Exceptions) 697 Builder.defineMacro("__EXCEPTIONS"); 698 if (!LangOpts.MSVCCompat && LangOpts.RTTI) 699 Builder.defineMacro("__GXX_RTTI"); 700 701 if (LangOpts.SjLjExceptions) 702 Builder.defineMacro("__USING_SJLJ_EXCEPTIONS__"); 703 else if (LangOpts.SEHExceptions) 704 Builder.defineMacro("__SEH__"); 705 else if (LangOpts.DWARFExceptions && 706 (TI.getTriple().isThumb() || TI.getTriple().isARM())) 707 Builder.defineMacro("__ARM_DWARF_EH__"); 708 709 if (LangOpts.Deprecated) 710 Builder.defineMacro("__DEPRECATED"); 711 712 if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus) { 713 Builder.defineMacro("__GNUG__", "4"); 714 Builder.defineMacro("__GXX_WEAK__"); 715 Builder.defineMacro("__private_extern__", "extern"); 716 } 717 718 if (LangOpts.MicrosoftExt) { 719 if (LangOpts.WChar) { 720 // wchar_t supported as a keyword. 721 Builder.defineMacro("_WCHAR_T_DEFINED"); 722 Builder.defineMacro("_NATIVE_WCHAR_T_DEFINED"); 723 } 724 } 725 726 if (LangOpts.Optimize) 727 Builder.defineMacro("__OPTIMIZE__"); 728 if (LangOpts.OptimizeSize) 729 Builder.defineMacro("__OPTIMIZE_SIZE__"); 730 731 if (LangOpts.FastMath) 732 Builder.defineMacro("__FAST_MATH__"); 733 734 // Initialize target-specific preprocessor defines. 735 736 // __BYTE_ORDER__ was added in GCC 4.6. It's analogous 737 // to the macro __BYTE_ORDER (no trailing underscores) 738 // from glibc's <endian.h> header. 739 // We don't support the PDP-11 as a target, but include 740 // the define so it can still be compared against. 741 Builder.defineMacro("__ORDER_LITTLE_ENDIAN__", "1234"); 742 Builder.defineMacro("__ORDER_BIG_ENDIAN__", "4321"); 743 Builder.defineMacro("__ORDER_PDP_ENDIAN__", "3412"); 744 if (TI.isBigEndian()) { 745 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_BIG_ENDIAN__"); 746 Builder.defineMacro("__BIG_ENDIAN__"); 747 } else { 748 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_LITTLE_ENDIAN__"); 749 Builder.defineMacro("__LITTLE_ENDIAN__"); 750 } 751 752 if (TI.getPointerWidth(0) == 64 && TI.getLongWidth() == 64 753 && TI.getIntWidth() == 32) { 754 Builder.defineMacro("_LP64"); 755 Builder.defineMacro("__LP64__"); 756 } 757 758 if (TI.getPointerWidth(0) == 32 && TI.getLongWidth() == 32 759 && TI.getIntWidth() == 32) { 760 Builder.defineMacro("_ILP32"); 761 Builder.defineMacro("__ILP32__"); 762 } 763 764 // Define type sizing macros based on the target properties. 765 assert(TI.getCharWidth() == 8 && "Only support 8-bit char so far"); 766 Builder.defineMacro("__CHAR_BIT__", Twine(TI.getCharWidth())); 767 768 DefineTypeSize("__SCHAR_MAX__", TargetInfo::SignedChar, TI, Builder); 769 DefineTypeSize("__SHRT_MAX__", TargetInfo::SignedShort, TI, Builder); 770 DefineTypeSize("__INT_MAX__", TargetInfo::SignedInt, TI, Builder); 771 DefineTypeSize("__LONG_MAX__", TargetInfo::SignedLong, TI, Builder); 772 DefineTypeSize("__LONG_LONG_MAX__", TargetInfo::SignedLongLong, TI, Builder); 773 DefineTypeSize("__WCHAR_MAX__", TI.getWCharType(), TI, Builder); 774 DefineTypeSize("__WINT_MAX__", TI.getWIntType(), TI, Builder); 775 DefineTypeSize("__INTMAX_MAX__", TI.getIntMaxType(), TI, Builder); 776 DefineTypeSize("__SIZE_MAX__", TI.getSizeType(), TI, Builder); 777 778 DefineTypeSize("__UINTMAX_MAX__", TI.getUIntMaxType(), TI, Builder); 779 DefineTypeSize("__PTRDIFF_MAX__", TI.getPtrDiffType(0), TI, Builder); 780 DefineTypeSize("__INTPTR_MAX__", TI.getIntPtrType(), TI, Builder); 781 DefineTypeSize("__UINTPTR_MAX__", TI.getUIntPtrType(), TI, Builder); 782 783 DefineTypeSizeof("__SIZEOF_DOUBLE__", TI.getDoubleWidth(), TI, Builder); 784 DefineTypeSizeof("__SIZEOF_FLOAT__", TI.getFloatWidth(), TI, Builder); 785 DefineTypeSizeof("__SIZEOF_INT__", TI.getIntWidth(), TI, Builder); 786 DefineTypeSizeof("__SIZEOF_LONG__", TI.getLongWidth(), TI, Builder); 787 DefineTypeSizeof("__SIZEOF_LONG_DOUBLE__",TI.getLongDoubleWidth(),TI,Builder); 788 DefineTypeSizeof("__SIZEOF_LONG_LONG__", TI.getLongLongWidth(), TI, Builder); 789 DefineTypeSizeof("__SIZEOF_POINTER__", TI.getPointerWidth(0), TI, Builder); 790 DefineTypeSizeof("__SIZEOF_SHORT__", TI.getShortWidth(), TI, Builder); 791 DefineTypeSizeof("__SIZEOF_PTRDIFF_T__", 792 TI.getTypeWidth(TI.getPtrDiffType(0)), TI, Builder); 793 DefineTypeSizeof("__SIZEOF_SIZE_T__", 794 TI.getTypeWidth(TI.getSizeType()), TI, Builder); 795 DefineTypeSizeof("__SIZEOF_WCHAR_T__", 796 TI.getTypeWidth(TI.getWCharType()), TI, Builder); 797 DefineTypeSizeof("__SIZEOF_WINT_T__", 798 TI.getTypeWidth(TI.getWIntType()), TI, Builder); 799 if (TI.hasInt128Type()) 800 DefineTypeSizeof("__SIZEOF_INT128__", 128, TI, Builder); 801 802 DefineType("__INTMAX_TYPE__", TI.getIntMaxType(), Builder); 803 DefineFmt("__INTMAX", TI.getIntMaxType(), TI, Builder); 804 Builder.defineMacro("__INTMAX_C_SUFFIX__", 805 TI.getTypeConstantSuffix(TI.getIntMaxType())); 806 DefineType("__UINTMAX_TYPE__", TI.getUIntMaxType(), Builder); 807 DefineFmt("__UINTMAX", TI.getUIntMaxType(), TI, Builder); 808 Builder.defineMacro("__UINTMAX_C_SUFFIX__", 809 TI.getTypeConstantSuffix(TI.getUIntMaxType())); 810 DefineTypeWidth("__INTMAX_WIDTH__", TI.getIntMaxType(), TI, Builder); 811 DefineType("__PTRDIFF_TYPE__", TI.getPtrDiffType(0), Builder); 812 DefineFmt("__PTRDIFF", TI.getPtrDiffType(0), TI, Builder); 813 DefineTypeWidth("__PTRDIFF_WIDTH__", TI.getPtrDiffType(0), TI, Builder); 814 DefineType("__INTPTR_TYPE__", TI.getIntPtrType(), Builder); 815 DefineFmt("__INTPTR", TI.getIntPtrType(), TI, Builder); 816 DefineTypeWidth("__INTPTR_WIDTH__", TI.getIntPtrType(), TI, Builder); 817 DefineType("__SIZE_TYPE__", TI.getSizeType(), Builder); 818 DefineFmt("__SIZE", TI.getSizeType(), TI, Builder); 819 DefineTypeWidth("__SIZE_WIDTH__", TI.getSizeType(), TI, Builder); 820 DefineType("__WCHAR_TYPE__", TI.getWCharType(), Builder); 821 DefineTypeWidth("__WCHAR_WIDTH__", TI.getWCharType(), TI, Builder); 822 DefineType("__WINT_TYPE__", TI.getWIntType(), Builder); 823 DefineTypeWidth("__WINT_WIDTH__", TI.getWIntType(), TI, Builder); 824 DefineTypeWidth("__SIG_ATOMIC_WIDTH__", TI.getSigAtomicType(), TI, Builder); 825 DefineTypeSize("__SIG_ATOMIC_MAX__", TI.getSigAtomicType(), TI, Builder); 826 DefineType("__CHAR16_TYPE__", TI.getChar16Type(), Builder); 827 DefineType("__CHAR32_TYPE__", TI.getChar32Type(), Builder); 828 829 DefineTypeWidth("__UINTMAX_WIDTH__", TI.getUIntMaxType(), TI, Builder); 830 DefineType("__UINTPTR_TYPE__", TI.getUIntPtrType(), Builder); 831 DefineFmt("__UINTPTR", TI.getUIntPtrType(), TI, Builder); 832 DefineTypeWidth("__UINTPTR_WIDTH__", TI.getUIntPtrType(), TI, Builder); 833 834 DefineFloatMacros(Builder, "FLT16", &TI.getHalfFormat(), "F16"); 835 DefineFloatMacros(Builder, "FLT", &TI.getFloatFormat(), "F"); 836 DefineFloatMacros(Builder, "DBL", &TI.getDoubleFormat(), ""); 837 DefineFloatMacros(Builder, "LDBL", &TI.getLongDoubleFormat(), "L"); 838 839 // Define a __POINTER_WIDTH__ macro for stdint.h. 840 Builder.defineMacro("__POINTER_WIDTH__", 841 Twine((int)TI.getPointerWidth(0))); 842 843 // Define __BIGGEST_ALIGNMENT__ to be compatible with gcc. 844 Builder.defineMacro("__BIGGEST_ALIGNMENT__", 845 Twine(TI.getSuitableAlign() / TI.getCharWidth()) ); 846 847 if (!LangOpts.CharIsSigned) 848 Builder.defineMacro("__CHAR_UNSIGNED__"); 849 850 if (!TargetInfo::isTypeSigned(TI.getWCharType())) 851 Builder.defineMacro("__WCHAR_UNSIGNED__"); 852 853 if (!TargetInfo::isTypeSigned(TI.getWIntType())) 854 Builder.defineMacro("__WINT_UNSIGNED__"); 855 856 // Define exact-width integer types for stdint.h 857 DefineExactWidthIntType(TargetInfo::SignedChar, TI, Builder); 858 859 if (TI.getShortWidth() > TI.getCharWidth()) 860 DefineExactWidthIntType(TargetInfo::SignedShort, TI, Builder); 861 862 if (TI.getIntWidth() > TI.getShortWidth()) 863 DefineExactWidthIntType(TargetInfo::SignedInt, TI, Builder); 864 865 if (TI.getLongWidth() > TI.getIntWidth()) 866 DefineExactWidthIntType(TargetInfo::SignedLong, TI, Builder); 867 868 if (TI.getLongLongWidth() > TI.getLongWidth()) 869 DefineExactWidthIntType(TargetInfo::SignedLongLong, TI, Builder); 870 871 DefineExactWidthIntType(TargetInfo::UnsignedChar, TI, Builder); 872 DefineExactWidthIntTypeSize(TargetInfo::UnsignedChar, TI, Builder); 873 DefineExactWidthIntTypeSize(TargetInfo::SignedChar, TI, Builder); 874 875 if (TI.getShortWidth() > TI.getCharWidth()) { 876 DefineExactWidthIntType(TargetInfo::UnsignedShort, TI, Builder); 877 DefineExactWidthIntTypeSize(TargetInfo::UnsignedShort, TI, Builder); 878 DefineExactWidthIntTypeSize(TargetInfo::SignedShort, TI, Builder); 879 } 880 881 if (TI.getIntWidth() > TI.getShortWidth()) { 882 DefineExactWidthIntType(TargetInfo::UnsignedInt, TI, Builder); 883 DefineExactWidthIntTypeSize(TargetInfo::UnsignedInt, TI, Builder); 884 DefineExactWidthIntTypeSize(TargetInfo::SignedInt, TI, Builder); 885 } 886 887 if (TI.getLongWidth() > TI.getIntWidth()) { 888 DefineExactWidthIntType(TargetInfo::UnsignedLong, TI, Builder); 889 DefineExactWidthIntTypeSize(TargetInfo::UnsignedLong, TI, Builder); 890 DefineExactWidthIntTypeSize(TargetInfo::SignedLong, TI, Builder); 891 } 892 893 if (TI.getLongLongWidth() > TI.getLongWidth()) { 894 DefineExactWidthIntType(TargetInfo::UnsignedLongLong, TI, Builder); 895 DefineExactWidthIntTypeSize(TargetInfo::UnsignedLongLong, TI, Builder); 896 DefineExactWidthIntTypeSize(TargetInfo::SignedLongLong, TI, Builder); 897 } 898 899 DefineLeastWidthIntType(8, true, TI, Builder); 900 DefineLeastWidthIntType(8, false, TI, Builder); 901 DefineLeastWidthIntType(16, true, TI, Builder); 902 DefineLeastWidthIntType(16, false, TI, Builder); 903 DefineLeastWidthIntType(32, true, TI, Builder); 904 DefineLeastWidthIntType(32, false, TI, Builder); 905 DefineLeastWidthIntType(64, true, TI, Builder); 906 DefineLeastWidthIntType(64, false, TI, Builder); 907 908 DefineFastIntType(8, true, TI, Builder); 909 DefineFastIntType(8, false, TI, Builder); 910 DefineFastIntType(16, true, TI, Builder); 911 DefineFastIntType(16, false, TI, Builder); 912 DefineFastIntType(32, true, TI, Builder); 913 DefineFastIntType(32, false, TI, Builder); 914 DefineFastIntType(64, true, TI, Builder); 915 DefineFastIntType(64, false, TI, Builder); 916 917 char UserLabelPrefix[2] = {TI.getDataLayout().getGlobalPrefix(), 0}; 918 Builder.defineMacro("__USER_LABEL_PREFIX__", UserLabelPrefix); 919 920 if (LangOpts.FastMath || LangOpts.FiniteMathOnly) 921 Builder.defineMacro("__FINITE_MATH_ONLY__", "1"); 922 else 923 Builder.defineMacro("__FINITE_MATH_ONLY__", "0"); 924 925 if (!LangOpts.MSVCCompat) { 926 if (LangOpts.GNUInline || LangOpts.CPlusPlus) 927 Builder.defineMacro("__GNUC_GNU_INLINE__"); 928 else 929 Builder.defineMacro("__GNUC_STDC_INLINE__"); 930 931 // The value written by __atomic_test_and_set. 932 // FIXME: This is target-dependent. 933 Builder.defineMacro("__GCC_ATOMIC_TEST_AND_SET_TRUEVAL", "1"); 934 } 935 936 auto addLockFreeMacros = [&](const llvm::Twine &Prefix) { 937 // Used by libc++ and libstdc++ to implement ATOMIC_<foo>_LOCK_FREE. 938 unsigned InlineWidthBits = TI.getMaxAtomicInlineWidth(); 939 #define DEFINE_LOCK_FREE_MACRO(TYPE, Type) \ 940 Builder.defineMacro(Prefix + #TYPE "_LOCK_FREE", \ 941 getLockFreeValue(TI.get##Type##Width(), \ 942 TI.get##Type##Align(), \ 943 InlineWidthBits)); 944 DEFINE_LOCK_FREE_MACRO(BOOL, Bool); 945 DEFINE_LOCK_FREE_MACRO(CHAR, Char); 946 if (LangOpts.Char8) 947 DEFINE_LOCK_FREE_MACRO(CHAR8_T, Char); // Treat char8_t like char. 948 DEFINE_LOCK_FREE_MACRO(CHAR16_T, Char16); 949 DEFINE_LOCK_FREE_MACRO(CHAR32_T, Char32); 950 DEFINE_LOCK_FREE_MACRO(WCHAR_T, WChar); 951 DEFINE_LOCK_FREE_MACRO(SHORT, Short); 952 DEFINE_LOCK_FREE_MACRO(INT, Int); 953 DEFINE_LOCK_FREE_MACRO(LONG, Long); 954 DEFINE_LOCK_FREE_MACRO(LLONG, LongLong); 955 Builder.defineMacro(Prefix + "POINTER_LOCK_FREE", 956 getLockFreeValue(TI.getPointerWidth(0), 957 TI.getPointerAlign(0), 958 InlineWidthBits)); 959 #undef DEFINE_LOCK_FREE_MACRO 960 }; 961 addLockFreeMacros("__CLANG_ATOMIC_"); 962 if (!LangOpts.MSVCCompat) 963 addLockFreeMacros("__GCC_ATOMIC_"); 964 965 if (LangOpts.NoInlineDefine) 966 Builder.defineMacro("__NO_INLINE__"); 967 968 if (unsigned PICLevel = LangOpts.PICLevel) { 969 Builder.defineMacro("__PIC__", Twine(PICLevel)); 970 Builder.defineMacro("__pic__", Twine(PICLevel)); 971 if (LangOpts.PIE) { 972 Builder.defineMacro("__PIE__", Twine(PICLevel)); 973 Builder.defineMacro("__pie__", Twine(PICLevel)); 974 } 975 } 976 977 // Macros to control C99 numerics and <float.h> 978 Builder.defineMacro("__FLT_EVAL_METHOD__", Twine(TI.getFloatEvalMethod())); 979 Builder.defineMacro("__FLT_RADIX__", "2"); 980 Builder.defineMacro("__DECIMAL_DIG__", "__LDBL_DECIMAL_DIG__"); 981 982 if (LangOpts.getStackProtector() == LangOptions::SSPOn) 983 Builder.defineMacro("__SSP__"); 984 else if (LangOpts.getStackProtector() == LangOptions::SSPStrong) 985 Builder.defineMacro("__SSP_STRONG__", "2"); 986 else if (LangOpts.getStackProtector() == LangOptions::SSPReq) 987 Builder.defineMacro("__SSP_ALL__", "3"); 988 989 // Define a macro that exists only when using the static analyzer. 990 if (FEOpts.ProgramAction == frontend::RunAnalysis) 991 Builder.defineMacro("__clang_analyzer__"); 992 993 if (LangOpts.FastRelaxedMath) 994 Builder.defineMacro("__FAST_RELAXED_MATH__"); 995 996 if (FEOpts.ProgramAction == frontend::RewriteObjC || 997 LangOpts.getGC() != LangOptions::NonGC) { 998 Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))"); 999 Builder.defineMacro("__strong", "__attribute__((objc_gc(strong)))"); 1000 Builder.defineMacro("__autoreleasing", ""); 1001 Builder.defineMacro("__unsafe_unretained", ""); 1002 } else if (LangOpts.ObjC1) { 1003 Builder.defineMacro("__weak", "__attribute__((objc_ownership(weak)))"); 1004 Builder.defineMacro("__strong", "__attribute__((objc_ownership(strong)))"); 1005 Builder.defineMacro("__autoreleasing", 1006 "__attribute__((objc_ownership(autoreleasing)))"); 1007 Builder.defineMacro("__unsafe_unretained", 1008 "__attribute__((objc_ownership(none)))"); 1009 } 1010 1011 // On Darwin, there are __double_underscored variants of the type 1012 // nullability qualifiers. 1013 if (TI.getTriple().isOSDarwin()) { 1014 Builder.defineMacro("__nonnull", "_Nonnull"); 1015 Builder.defineMacro("__null_unspecified", "_Null_unspecified"); 1016 Builder.defineMacro("__nullable", "_Nullable"); 1017 } 1018 1019 // Add a macro to differentiate between regular iOS/tvOS/watchOS targets and 1020 // the corresponding simulator targets. 1021 if (TI.getTriple().isOSDarwin() && TI.getTriple().isSimulatorEnvironment()) 1022 Builder.defineMacro("__APPLE_EMBEDDED_SIMULATOR__", "1"); 1023 1024 // OpenMP definition 1025 // OpenMP 2.2: 1026 // In implementations that support a preprocessor, the _OPENMP 1027 // macro name is defined to have the decimal value yyyymm where 1028 // yyyy and mm are the year and the month designations of the 1029 // version of the OpenMP API that the implementation support. 1030 switch (LangOpts.OpenMP) { 1031 case 0: 1032 break; 1033 case 40: 1034 Builder.defineMacro("_OPENMP", "201307"); 1035 break; 1036 case 45: 1037 Builder.defineMacro("_OPENMP", "201511"); 1038 break; 1039 default: 1040 // Default version is OpenMP 3.1, in Simd only mode - 4.5 1041 Builder.defineMacro("_OPENMP", LangOpts.OpenMPSimd ? "201511" : "201107"); 1042 break; 1043 } 1044 1045 // CUDA device path compilaton 1046 if (LangOpts.CUDAIsDevice && !LangOpts.HIP) { 1047 // The CUDA_ARCH value is set for the GPU target specified in the NVPTX 1048 // backend's target defines. 1049 Builder.defineMacro("__CUDA_ARCH__"); 1050 } 1051 1052 // We need to communicate this to our CUDA header wrapper, which in turn 1053 // informs the proper CUDA headers of this choice. 1054 if (LangOpts.CUDADeviceApproxTranscendentals || LangOpts.FastMath) { 1055 Builder.defineMacro("__CLANG_CUDA_APPROX_TRANSCENDENTALS__"); 1056 } 1057 1058 // OpenCL definitions. 1059 if (LangOpts.OpenCL) { 1060 #define OPENCLEXT(Ext) \ 1061 if (TI.getSupportedOpenCLOpts().isSupported(#Ext, \ 1062 LangOpts.OpenCLVersion)) \ 1063 Builder.defineMacro(#Ext); 1064 #include "clang/Basic/OpenCLExtensions.def" 1065 1066 auto Arch = TI.getTriple().getArch(); 1067 if (Arch == llvm::Triple::spir || Arch == llvm::Triple::spir64) 1068 Builder.defineMacro("__IMAGE_SUPPORT__"); 1069 } 1070 1071 if (TI.hasInt128Type() && LangOpts.CPlusPlus && LangOpts.GNUMode) { 1072 // For each extended integer type, g++ defines a macro mapping the 1073 // index of the type (0 in this case) in some list of extended types 1074 // to the type. 1075 Builder.defineMacro("__GLIBCXX_TYPE_INT_N_0", "__int128"); 1076 Builder.defineMacro("__GLIBCXX_BITSIZE_INT_N_0", "128"); 1077 } 1078 1079 // Get other target #defines. 1080 TI.getTargetDefines(LangOpts, Builder); 1081 } 1082 1083 /// InitializePreprocessor - Initialize the preprocessor getting it and the 1084 /// environment ready to process a single file. This returns true on error. 1085 /// 1086 void clang::InitializePreprocessor( 1087 Preprocessor &PP, const PreprocessorOptions &InitOpts, 1088 const PCHContainerReader &PCHContainerRdr, 1089 const FrontendOptions &FEOpts) { 1090 const LangOptions &LangOpts = PP.getLangOpts(); 1091 std::string PredefineBuffer; 1092 PredefineBuffer.reserve(4080); 1093 llvm::raw_string_ostream Predefines(PredefineBuffer); 1094 MacroBuilder Builder(Predefines); 1095 1096 // Emit line markers for various builtin sections of the file. We don't do 1097 // this in asm preprocessor mode, because "# 4" is not a line marker directive 1098 // in this mode. 1099 if (!PP.getLangOpts().AsmPreprocessor) 1100 Builder.append("# 1 \"<built-in>\" 3"); 1101 1102 // Install things like __POWERPC__, __GNUC__, etc into the macro table. 1103 if (InitOpts.UsePredefines) { 1104 // FIXME: This will create multiple definitions for most of the predefined 1105 // macros. This is not the right way to handle this. 1106 if ((LangOpts.CUDA || LangOpts.OpenMPIsDevice) && PP.getAuxTargetInfo()) 1107 InitializePredefinedMacros(*PP.getAuxTargetInfo(), LangOpts, FEOpts, 1108 Builder); 1109 1110 InitializePredefinedMacros(PP.getTargetInfo(), LangOpts, FEOpts, Builder); 1111 1112 // Install definitions to make Objective-C++ ARC work well with various 1113 // C++ Standard Library implementations. 1114 if (LangOpts.ObjC1 && LangOpts.CPlusPlus && 1115 (LangOpts.ObjCAutoRefCount || LangOpts.ObjCWeak)) { 1116 switch (InitOpts.ObjCXXARCStandardLibrary) { 1117 case ARCXX_nolib: 1118 case ARCXX_libcxx: 1119 break; 1120 1121 case ARCXX_libstdcxx: 1122 AddObjCXXARCLibstdcxxDefines(LangOpts, Builder); 1123 break; 1124 } 1125 } 1126 } 1127 1128 // Even with predefines off, some macros are still predefined. 1129 // These should all be defined in the preprocessor according to the 1130 // current language configuration. 1131 InitializeStandardPredefinedMacros(PP.getTargetInfo(), PP.getLangOpts(), 1132 FEOpts, Builder); 1133 1134 // Add on the predefines from the driver. Wrap in a #line directive to report 1135 // that they come from the command line. 1136 if (!PP.getLangOpts().AsmPreprocessor) 1137 Builder.append("# 1 \"<command line>\" 1"); 1138 1139 // Process #define's and #undef's in the order they are given. 1140 for (unsigned i = 0, e = InitOpts.Macros.size(); i != e; ++i) { 1141 if (InitOpts.Macros[i].second) // isUndef 1142 Builder.undefineMacro(InitOpts.Macros[i].first); 1143 else 1144 DefineBuiltinMacro(Builder, InitOpts.Macros[i].first, 1145 PP.getDiagnostics()); 1146 } 1147 1148 // Exit the command line and go back to <built-in> (2 is LC_LEAVE). 1149 if (!PP.getLangOpts().AsmPreprocessor) 1150 Builder.append("# 1 \"<built-in>\" 2"); 1151 1152 // If -imacros are specified, include them now. These are processed before 1153 // any -include directives. 1154 for (unsigned i = 0, e = InitOpts.MacroIncludes.size(); i != e; ++i) 1155 AddImplicitIncludeMacros(Builder, InitOpts.MacroIncludes[i]); 1156 1157 // Process -include-pch/-include-pth directives. 1158 if (!InitOpts.ImplicitPCHInclude.empty()) 1159 AddImplicitIncludePCH(Builder, PP, PCHContainerRdr, 1160 InitOpts.ImplicitPCHInclude); 1161 if (!InitOpts.ImplicitPTHInclude.empty()) 1162 AddImplicitIncludePTH(Builder, PP, InitOpts.ImplicitPTHInclude); 1163 1164 // Process -include directives. 1165 for (unsigned i = 0, e = InitOpts.Includes.size(); i != e; ++i) { 1166 const std::string &Path = InitOpts.Includes[i]; 1167 AddImplicitInclude(Builder, Path); 1168 } 1169 1170 // Instruct the preprocessor to skip the preamble. 1171 PP.setSkipMainFilePreamble(InitOpts.PrecompiledPreambleBytes.first, 1172 InitOpts.PrecompiledPreambleBytes.second); 1173 1174 // Copy PredefinedBuffer into the Preprocessor. 1175 PP.setPredefines(Predefines.str()); 1176 } 1177