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 /// 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 /// 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.ObjC) 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", "199711L"); 491 if (LangOpts.CXXExceptions) 492 Builder.defineMacro("__cpp_exceptions", "199711L"); 493 494 // C++11 features. 495 if (LangOpts.CPlusPlus11) { 496 Builder.defineMacro("__cpp_unicode_characters", "200704L"); 497 Builder.defineMacro("__cpp_raw_strings", "200710L"); 498 Builder.defineMacro("__cpp_unicode_literals", "200710L"); 499 Builder.defineMacro("__cpp_user_defined_literals", "200809L"); 500 Builder.defineMacro("__cpp_lambdas", "200907L"); 501 Builder.defineMacro("__cpp_constexpr", 502 LangOpts.CPlusPlus17 ? "201603L" : 503 LangOpts.CPlusPlus14 ? "201304L" : "200704"); 504 Builder.defineMacro("__cpp_range_based_for", 505 LangOpts.CPlusPlus17 ? "201603L" : "200907"); 506 Builder.defineMacro("__cpp_static_assert", 507 LangOpts.CPlusPlus17 ? "201411L" : "200410"); 508 Builder.defineMacro("__cpp_decltype", "200707L"); 509 Builder.defineMacro("__cpp_attributes", "200809L"); 510 Builder.defineMacro("__cpp_rvalue_references", "200610L"); 511 Builder.defineMacro("__cpp_variadic_templates", "200704L"); 512 Builder.defineMacro("__cpp_initializer_lists", "200806L"); 513 Builder.defineMacro("__cpp_delegating_constructors", "200604L"); 514 Builder.defineMacro("__cpp_nsdmi", "200809L"); 515 Builder.defineMacro("__cpp_inheriting_constructors", "201511L"); 516 Builder.defineMacro("__cpp_ref_qualifiers", "200710L"); 517 Builder.defineMacro("__cpp_alias_templates", "200704L"); 518 } 519 if (LangOpts.ThreadsafeStatics) 520 Builder.defineMacro("__cpp_threadsafe_static_init", "200806L"); 521 522 // C++14 features. 523 if (LangOpts.CPlusPlus14) { 524 Builder.defineMacro("__cpp_binary_literals", "201304L"); 525 Builder.defineMacro("__cpp_digit_separators", "201309L"); 526 Builder.defineMacro("__cpp_init_captures", "201304L"); 527 Builder.defineMacro("__cpp_generic_lambdas", "201304L"); 528 Builder.defineMacro("__cpp_decltype_auto", "201304L"); 529 Builder.defineMacro("__cpp_return_type_deduction", "201304L"); 530 Builder.defineMacro("__cpp_aggregate_nsdmi", "201304L"); 531 Builder.defineMacro("__cpp_variable_templates", "201304L"); 532 } 533 if (LangOpts.SizedDeallocation) 534 Builder.defineMacro("__cpp_sized_deallocation", "201309L"); 535 536 // C++17 features. 537 if (LangOpts.CPlusPlus17) { 538 Builder.defineMacro("__cpp_hex_float", "201603L"); 539 Builder.defineMacro("__cpp_inline_variables", "201606L"); 540 Builder.defineMacro("__cpp_noexcept_function_type", "201510L"); 541 Builder.defineMacro("__cpp_capture_star_this", "201603L"); 542 Builder.defineMacro("__cpp_if_constexpr", "201606L"); 543 Builder.defineMacro("__cpp_deduction_guides", "201703L"); 544 Builder.defineMacro("__cpp_template_auto", "201606L"); // (old name) 545 Builder.defineMacro("__cpp_namespace_attributes", "201411L"); 546 Builder.defineMacro("__cpp_enumerator_attributes", "201411L"); 547 Builder.defineMacro("__cpp_nested_namespace_definitions", "201411L"); 548 Builder.defineMacro("__cpp_variadic_using", "201611L"); 549 Builder.defineMacro("__cpp_aggregate_bases", "201603L"); 550 Builder.defineMacro("__cpp_structured_bindings", "201606L"); 551 Builder.defineMacro("__cpp_nontype_template_args", "201411L"); 552 Builder.defineMacro("__cpp_fold_expressions", "201603L"); 553 Builder.defineMacro("__cpp_guaranteed_copy_elision", "201606L"); 554 Builder.defineMacro("__cpp_nontype_template_parameter_auto", "201606L"); 555 } 556 if (LangOpts.AlignedAllocation && !LangOpts.AlignedAllocationUnavailable) 557 Builder.defineMacro("__cpp_aligned_new", "201606L"); 558 if (LangOpts.RelaxedTemplateTemplateArgs) 559 Builder.defineMacro("__cpp_template_template_args", "201611L"); 560 561 // C++20 features. 562 if (LangOpts.Char8) 563 Builder.defineMacro("__cpp_char8_t", "201811L"); 564 565 // TS features. 566 if (LangOpts.ConceptsTS) 567 Builder.defineMacro("__cpp_experimental_concepts", "1L"); 568 if (LangOpts.CoroutinesTS) 569 Builder.defineMacro("__cpp_coroutines", "201703L"); 570 } 571 572 static void InitializePredefinedMacros(const TargetInfo &TI, 573 const LangOptions &LangOpts, 574 const FrontendOptions &FEOpts, 575 MacroBuilder &Builder) { 576 // Compiler version introspection macros. 577 Builder.defineMacro("__llvm__"); // LLVM Backend 578 Builder.defineMacro("__clang__"); // Clang Frontend 579 #define TOSTR2(X) #X 580 #define TOSTR(X) TOSTR2(X) 581 Builder.defineMacro("__clang_major__", TOSTR(CLANG_VERSION_MAJOR)); 582 Builder.defineMacro("__clang_minor__", TOSTR(CLANG_VERSION_MINOR)); 583 Builder.defineMacro("__clang_patchlevel__", TOSTR(CLANG_VERSION_PATCHLEVEL)); 584 #undef TOSTR 585 #undef TOSTR2 586 Builder.defineMacro("__clang_version__", 587 "\"" CLANG_VERSION_STRING " " 588 + getClangFullRepositoryVersion() + "\""); 589 if (!LangOpts.MSVCCompat) { 590 // Currently claim to be compatible with GCC 4.2.1-5621, but only if we're 591 // not compiling for MSVC compatibility 592 Builder.defineMacro("__GNUC_MINOR__", "2"); 593 Builder.defineMacro("__GNUC_PATCHLEVEL__", "1"); 594 Builder.defineMacro("__GNUC__", "4"); 595 Builder.defineMacro("__GXX_ABI_VERSION", "1002"); 596 } 597 598 // Define macros for the C11 / C++11 memory orderings 599 Builder.defineMacro("__ATOMIC_RELAXED", "0"); 600 Builder.defineMacro("__ATOMIC_CONSUME", "1"); 601 Builder.defineMacro("__ATOMIC_ACQUIRE", "2"); 602 Builder.defineMacro("__ATOMIC_RELEASE", "3"); 603 Builder.defineMacro("__ATOMIC_ACQ_REL", "4"); 604 Builder.defineMacro("__ATOMIC_SEQ_CST", "5"); 605 606 // Define macros for the OpenCL memory scope. 607 // The values should match AtomicScopeOpenCLModel::ID enum. 608 static_assert( 609 static_cast<unsigned>(AtomicScopeOpenCLModel::WorkGroup) == 1 && 610 static_cast<unsigned>(AtomicScopeOpenCLModel::Device) == 2 && 611 static_cast<unsigned>(AtomicScopeOpenCLModel::AllSVMDevices) == 3 && 612 static_cast<unsigned>(AtomicScopeOpenCLModel::SubGroup) == 4, 613 "Invalid OpenCL memory scope enum definition"); 614 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_WORK_ITEM", "0"); 615 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_WORK_GROUP", "1"); 616 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_DEVICE", "2"); 617 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_ALL_SVM_DEVICES", "3"); 618 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_SUB_GROUP", "4"); 619 620 // Support for #pragma redefine_extname (Sun compatibility) 621 Builder.defineMacro("__PRAGMA_REDEFINE_EXTNAME", "1"); 622 623 // As sad as it is, enough software depends on the __VERSION__ for version 624 // checks that it is necessary to report 4.2.1 (the base GCC version we claim 625 // compatibility with) first. 626 Builder.defineMacro("__VERSION__", "\"4.2.1 Compatible " + 627 Twine(getClangFullCPPVersion()) + "\""); 628 629 // Initialize language-specific preprocessor defines. 630 631 // Standard conforming mode? 632 if (!LangOpts.GNUMode && !LangOpts.MSVCCompat) 633 Builder.defineMacro("__STRICT_ANSI__"); 634 635 if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus11) 636 Builder.defineMacro("__GXX_EXPERIMENTAL_CXX0X__"); 637 638 if (LangOpts.ObjC) { 639 if (LangOpts.ObjCRuntime.isNonFragile()) { 640 Builder.defineMacro("__OBJC2__"); 641 642 if (LangOpts.ObjCExceptions) 643 Builder.defineMacro("OBJC_ZEROCOST_EXCEPTIONS"); 644 } 645 646 if (LangOpts.getGC() != LangOptions::NonGC) 647 Builder.defineMacro("__OBJC_GC__"); 648 649 if (LangOpts.ObjCRuntime.isNeXTFamily()) 650 Builder.defineMacro("__NEXT_RUNTIME__"); 651 652 if (LangOpts.ObjCRuntime.getKind() == ObjCRuntime::GNUstep) { 653 auto version = LangOpts.ObjCRuntime.getVersion(); 654 std::string versionString = "1"; 655 // Don't rely on the tuple argument, because we can be asked to target 656 // later ABIs than we actually support, so clamp these values to those 657 // currently supported 658 if (version >= VersionTuple(2, 0)) 659 Builder.defineMacro("__OBJC_GNUSTEP_RUNTIME_ABI__", "20"); 660 else 661 Builder.defineMacro("__OBJC_GNUSTEP_RUNTIME_ABI__", 662 "1" + Twine(std::min(8U, version.getMinor().getValueOr(0)))); 663 } 664 665 if (LangOpts.ObjCRuntime.getKind() == ObjCRuntime::ObjFW) { 666 VersionTuple tuple = LangOpts.ObjCRuntime.getVersion(); 667 668 unsigned minor = 0; 669 if (tuple.getMinor().hasValue()) 670 minor = tuple.getMinor().getValue(); 671 672 unsigned subminor = 0; 673 if (tuple.getSubminor().hasValue()) 674 subminor = tuple.getSubminor().getValue(); 675 676 Builder.defineMacro("__OBJFW_RUNTIME_ABI__", 677 Twine(tuple.getMajor() * 10000 + minor * 100 + 678 subminor)); 679 } 680 681 Builder.defineMacro("IBOutlet", "__attribute__((iboutlet))"); 682 Builder.defineMacro("IBOutletCollection(ClassName)", 683 "__attribute__((iboutletcollection(ClassName)))"); 684 Builder.defineMacro("IBAction", "void)__attribute__((ibaction)"); 685 Builder.defineMacro("IBInspectable", ""); 686 Builder.defineMacro("IB_DESIGNABLE", ""); 687 } 688 689 // Define a macro that describes the Objective-C boolean type even for C 690 // and C++ since BOOL can be used from non Objective-C code. 691 Builder.defineMacro("__OBJC_BOOL_IS_BOOL", 692 Twine(TI.useSignedCharForObjCBool() ? "0" : "1")); 693 694 if (LangOpts.CPlusPlus) 695 InitializeCPlusPlusFeatureTestMacros(LangOpts, Builder); 696 697 // darwin_constant_cfstrings controls this. This is also dependent 698 // on other things like the runtime I believe. This is set even for C code. 699 if (!LangOpts.NoConstantCFStrings) 700 Builder.defineMacro("__CONSTANT_CFSTRINGS__"); 701 702 if (LangOpts.ObjC) 703 Builder.defineMacro("OBJC_NEW_PROPERTIES"); 704 705 if (LangOpts.PascalStrings) 706 Builder.defineMacro("__PASCAL_STRINGS__"); 707 708 if (LangOpts.Blocks) { 709 Builder.defineMacro("__block", "__attribute__((__blocks__(byref)))"); 710 Builder.defineMacro("__BLOCKS__"); 711 } 712 713 if (!LangOpts.MSVCCompat && LangOpts.Exceptions) 714 Builder.defineMacro("__EXCEPTIONS"); 715 if (!LangOpts.MSVCCompat && LangOpts.RTTI) 716 Builder.defineMacro("__GXX_RTTI"); 717 718 if (LangOpts.SjLjExceptions) 719 Builder.defineMacro("__USING_SJLJ_EXCEPTIONS__"); 720 else if (LangOpts.SEHExceptions) 721 Builder.defineMacro("__SEH__"); 722 else if (LangOpts.DWARFExceptions && 723 (TI.getTriple().isThumb() || TI.getTriple().isARM())) 724 Builder.defineMacro("__ARM_DWARF_EH__"); 725 726 if (LangOpts.Deprecated) 727 Builder.defineMacro("__DEPRECATED"); 728 729 if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus) { 730 Builder.defineMacro("__GNUG__", "4"); 731 Builder.defineMacro("__GXX_WEAK__"); 732 Builder.defineMacro("__private_extern__", "extern"); 733 } 734 735 if (LangOpts.MicrosoftExt) { 736 if (LangOpts.WChar) { 737 // wchar_t supported as a keyword. 738 Builder.defineMacro("_WCHAR_T_DEFINED"); 739 Builder.defineMacro("_NATIVE_WCHAR_T_DEFINED"); 740 } 741 } 742 743 if (LangOpts.Optimize) 744 Builder.defineMacro("__OPTIMIZE__"); 745 if (LangOpts.OptimizeSize) 746 Builder.defineMacro("__OPTIMIZE_SIZE__"); 747 748 if (LangOpts.FastMath) 749 Builder.defineMacro("__FAST_MATH__"); 750 751 // Initialize target-specific preprocessor defines. 752 753 // __BYTE_ORDER__ was added in GCC 4.6. It's analogous 754 // to the macro __BYTE_ORDER (no trailing underscores) 755 // from glibc's <endian.h> header. 756 // We don't support the PDP-11 as a target, but include 757 // the define so it can still be compared against. 758 Builder.defineMacro("__ORDER_LITTLE_ENDIAN__", "1234"); 759 Builder.defineMacro("__ORDER_BIG_ENDIAN__", "4321"); 760 Builder.defineMacro("__ORDER_PDP_ENDIAN__", "3412"); 761 if (TI.isBigEndian()) { 762 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_BIG_ENDIAN__"); 763 Builder.defineMacro("__BIG_ENDIAN__"); 764 } else { 765 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_LITTLE_ENDIAN__"); 766 Builder.defineMacro("__LITTLE_ENDIAN__"); 767 } 768 769 if (TI.getPointerWidth(0) == 64 && TI.getLongWidth() == 64 770 && TI.getIntWidth() == 32) { 771 Builder.defineMacro("_LP64"); 772 Builder.defineMacro("__LP64__"); 773 } 774 775 if (TI.getPointerWidth(0) == 32 && TI.getLongWidth() == 32 776 && TI.getIntWidth() == 32) { 777 Builder.defineMacro("_ILP32"); 778 Builder.defineMacro("__ILP32__"); 779 } 780 781 // Define type sizing macros based on the target properties. 782 assert(TI.getCharWidth() == 8 && "Only support 8-bit char so far"); 783 Builder.defineMacro("__CHAR_BIT__", Twine(TI.getCharWidth())); 784 785 DefineTypeSize("__SCHAR_MAX__", TargetInfo::SignedChar, TI, Builder); 786 DefineTypeSize("__SHRT_MAX__", TargetInfo::SignedShort, TI, Builder); 787 DefineTypeSize("__INT_MAX__", TargetInfo::SignedInt, TI, Builder); 788 DefineTypeSize("__LONG_MAX__", TargetInfo::SignedLong, TI, Builder); 789 DefineTypeSize("__LONG_LONG_MAX__", TargetInfo::SignedLongLong, TI, Builder); 790 DefineTypeSize("__WCHAR_MAX__", TI.getWCharType(), TI, Builder); 791 DefineTypeSize("__WINT_MAX__", TI.getWIntType(), TI, Builder); 792 DefineTypeSize("__INTMAX_MAX__", TI.getIntMaxType(), TI, Builder); 793 DefineTypeSize("__SIZE_MAX__", TI.getSizeType(), TI, Builder); 794 795 DefineTypeSize("__UINTMAX_MAX__", TI.getUIntMaxType(), TI, Builder); 796 DefineTypeSize("__PTRDIFF_MAX__", TI.getPtrDiffType(0), TI, Builder); 797 DefineTypeSize("__INTPTR_MAX__", TI.getIntPtrType(), TI, Builder); 798 DefineTypeSize("__UINTPTR_MAX__", TI.getUIntPtrType(), TI, Builder); 799 800 DefineTypeSizeof("__SIZEOF_DOUBLE__", TI.getDoubleWidth(), TI, Builder); 801 DefineTypeSizeof("__SIZEOF_FLOAT__", TI.getFloatWidth(), TI, Builder); 802 DefineTypeSizeof("__SIZEOF_INT__", TI.getIntWidth(), TI, Builder); 803 DefineTypeSizeof("__SIZEOF_LONG__", TI.getLongWidth(), TI, Builder); 804 DefineTypeSizeof("__SIZEOF_LONG_DOUBLE__",TI.getLongDoubleWidth(),TI,Builder); 805 DefineTypeSizeof("__SIZEOF_LONG_LONG__", TI.getLongLongWidth(), TI, Builder); 806 DefineTypeSizeof("__SIZEOF_POINTER__", TI.getPointerWidth(0), TI, Builder); 807 DefineTypeSizeof("__SIZEOF_SHORT__", TI.getShortWidth(), TI, Builder); 808 DefineTypeSizeof("__SIZEOF_PTRDIFF_T__", 809 TI.getTypeWidth(TI.getPtrDiffType(0)), TI, Builder); 810 DefineTypeSizeof("__SIZEOF_SIZE_T__", 811 TI.getTypeWidth(TI.getSizeType()), TI, Builder); 812 DefineTypeSizeof("__SIZEOF_WCHAR_T__", 813 TI.getTypeWidth(TI.getWCharType()), TI, Builder); 814 DefineTypeSizeof("__SIZEOF_WINT_T__", 815 TI.getTypeWidth(TI.getWIntType()), TI, Builder); 816 if (TI.hasInt128Type()) 817 DefineTypeSizeof("__SIZEOF_INT128__", 128, TI, Builder); 818 819 DefineType("__INTMAX_TYPE__", TI.getIntMaxType(), Builder); 820 DefineFmt("__INTMAX", TI.getIntMaxType(), TI, Builder); 821 Builder.defineMacro("__INTMAX_C_SUFFIX__", 822 TI.getTypeConstantSuffix(TI.getIntMaxType())); 823 DefineType("__UINTMAX_TYPE__", TI.getUIntMaxType(), Builder); 824 DefineFmt("__UINTMAX", TI.getUIntMaxType(), TI, Builder); 825 Builder.defineMacro("__UINTMAX_C_SUFFIX__", 826 TI.getTypeConstantSuffix(TI.getUIntMaxType())); 827 DefineTypeWidth("__INTMAX_WIDTH__", TI.getIntMaxType(), TI, Builder); 828 DefineType("__PTRDIFF_TYPE__", TI.getPtrDiffType(0), Builder); 829 DefineFmt("__PTRDIFF", TI.getPtrDiffType(0), TI, Builder); 830 DefineTypeWidth("__PTRDIFF_WIDTH__", TI.getPtrDiffType(0), TI, Builder); 831 DefineType("__INTPTR_TYPE__", TI.getIntPtrType(), Builder); 832 DefineFmt("__INTPTR", TI.getIntPtrType(), TI, Builder); 833 DefineTypeWidth("__INTPTR_WIDTH__", TI.getIntPtrType(), TI, Builder); 834 DefineType("__SIZE_TYPE__", TI.getSizeType(), Builder); 835 DefineFmt("__SIZE", TI.getSizeType(), TI, Builder); 836 DefineTypeWidth("__SIZE_WIDTH__", TI.getSizeType(), TI, Builder); 837 DefineType("__WCHAR_TYPE__", TI.getWCharType(), Builder); 838 DefineTypeWidth("__WCHAR_WIDTH__", TI.getWCharType(), TI, Builder); 839 DefineType("__WINT_TYPE__", TI.getWIntType(), Builder); 840 DefineTypeWidth("__WINT_WIDTH__", TI.getWIntType(), TI, Builder); 841 DefineTypeWidth("__SIG_ATOMIC_WIDTH__", TI.getSigAtomicType(), TI, Builder); 842 DefineTypeSize("__SIG_ATOMIC_MAX__", TI.getSigAtomicType(), TI, Builder); 843 DefineType("__CHAR16_TYPE__", TI.getChar16Type(), Builder); 844 DefineType("__CHAR32_TYPE__", TI.getChar32Type(), Builder); 845 846 DefineTypeWidth("__UINTMAX_WIDTH__", TI.getUIntMaxType(), TI, Builder); 847 DefineType("__UINTPTR_TYPE__", TI.getUIntPtrType(), Builder); 848 DefineFmt("__UINTPTR", TI.getUIntPtrType(), TI, Builder); 849 DefineTypeWidth("__UINTPTR_WIDTH__", TI.getUIntPtrType(), TI, Builder); 850 851 DefineFloatMacros(Builder, "FLT16", &TI.getHalfFormat(), "F16"); 852 DefineFloatMacros(Builder, "FLT", &TI.getFloatFormat(), "F"); 853 DefineFloatMacros(Builder, "DBL", &TI.getDoubleFormat(), ""); 854 DefineFloatMacros(Builder, "LDBL", &TI.getLongDoubleFormat(), "L"); 855 856 // Define a __POINTER_WIDTH__ macro for stdint.h. 857 Builder.defineMacro("__POINTER_WIDTH__", 858 Twine((int)TI.getPointerWidth(0))); 859 860 // Define __BIGGEST_ALIGNMENT__ to be compatible with gcc. 861 Builder.defineMacro("__BIGGEST_ALIGNMENT__", 862 Twine(TI.getSuitableAlign() / TI.getCharWidth()) ); 863 864 if (!LangOpts.CharIsSigned) 865 Builder.defineMacro("__CHAR_UNSIGNED__"); 866 867 if (!TargetInfo::isTypeSigned(TI.getWCharType())) 868 Builder.defineMacro("__WCHAR_UNSIGNED__"); 869 870 if (!TargetInfo::isTypeSigned(TI.getWIntType())) 871 Builder.defineMacro("__WINT_UNSIGNED__"); 872 873 // Define exact-width integer types for stdint.h 874 DefineExactWidthIntType(TargetInfo::SignedChar, TI, Builder); 875 876 if (TI.getShortWidth() > TI.getCharWidth()) 877 DefineExactWidthIntType(TargetInfo::SignedShort, TI, Builder); 878 879 if (TI.getIntWidth() > TI.getShortWidth()) 880 DefineExactWidthIntType(TargetInfo::SignedInt, TI, Builder); 881 882 if (TI.getLongWidth() > TI.getIntWidth()) 883 DefineExactWidthIntType(TargetInfo::SignedLong, TI, Builder); 884 885 if (TI.getLongLongWidth() > TI.getLongWidth()) 886 DefineExactWidthIntType(TargetInfo::SignedLongLong, TI, Builder); 887 888 DefineExactWidthIntType(TargetInfo::UnsignedChar, TI, Builder); 889 DefineExactWidthIntTypeSize(TargetInfo::UnsignedChar, TI, Builder); 890 DefineExactWidthIntTypeSize(TargetInfo::SignedChar, TI, Builder); 891 892 if (TI.getShortWidth() > TI.getCharWidth()) { 893 DefineExactWidthIntType(TargetInfo::UnsignedShort, TI, Builder); 894 DefineExactWidthIntTypeSize(TargetInfo::UnsignedShort, TI, Builder); 895 DefineExactWidthIntTypeSize(TargetInfo::SignedShort, TI, Builder); 896 } 897 898 if (TI.getIntWidth() > TI.getShortWidth()) { 899 DefineExactWidthIntType(TargetInfo::UnsignedInt, TI, Builder); 900 DefineExactWidthIntTypeSize(TargetInfo::UnsignedInt, TI, Builder); 901 DefineExactWidthIntTypeSize(TargetInfo::SignedInt, TI, Builder); 902 } 903 904 if (TI.getLongWidth() > TI.getIntWidth()) { 905 DefineExactWidthIntType(TargetInfo::UnsignedLong, TI, Builder); 906 DefineExactWidthIntTypeSize(TargetInfo::UnsignedLong, TI, Builder); 907 DefineExactWidthIntTypeSize(TargetInfo::SignedLong, TI, Builder); 908 } 909 910 if (TI.getLongLongWidth() > TI.getLongWidth()) { 911 DefineExactWidthIntType(TargetInfo::UnsignedLongLong, TI, Builder); 912 DefineExactWidthIntTypeSize(TargetInfo::UnsignedLongLong, TI, Builder); 913 DefineExactWidthIntTypeSize(TargetInfo::SignedLongLong, TI, Builder); 914 } 915 916 DefineLeastWidthIntType(8, true, TI, Builder); 917 DefineLeastWidthIntType(8, false, TI, Builder); 918 DefineLeastWidthIntType(16, true, TI, Builder); 919 DefineLeastWidthIntType(16, false, TI, Builder); 920 DefineLeastWidthIntType(32, true, TI, Builder); 921 DefineLeastWidthIntType(32, false, TI, Builder); 922 DefineLeastWidthIntType(64, true, TI, Builder); 923 DefineLeastWidthIntType(64, false, TI, Builder); 924 925 DefineFastIntType(8, true, TI, Builder); 926 DefineFastIntType(8, false, TI, Builder); 927 DefineFastIntType(16, true, TI, Builder); 928 DefineFastIntType(16, false, TI, Builder); 929 DefineFastIntType(32, true, TI, Builder); 930 DefineFastIntType(32, false, TI, Builder); 931 DefineFastIntType(64, true, TI, Builder); 932 DefineFastIntType(64, false, TI, Builder); 933 934 char UserLabelPrefix[2] = {TI.getDataLayout().getGlobalPrefix(), 0}; 935 Builder.defineMacro("__USER_LABEL_PREFIX__", UserLabelPrefix); 936 937 if (LangOpts.FastMath || LangOpts.FiniteMathOnly) 938 Builder.defineMacro("__FINITE_MATH_ONLY__", "1"); 939 else 940 Builder.defineMacro("__FINITE_MATH_ONLY__", "0"); 941 942 if (!LangOpts.MSVCCompat) { 943 if (LangOpts.GNUInline || LangOpts.CPlusPlus) 944 Builder.defineMacro("__GNUC_GNU_INLINE__"); 945 else 946 Builder.defineMacro("__GNUC_STDC_INLINE__"); 947 948 // The value written by __atomic_test_and_set. 949 // FIXME: This is target-dependent. 950 Builder.defineMacro("__GCC_ATOMIC_TEST_AND_SET_TRUEVAL", "1"); 951 } 952 953 auto addLockFreeMacros = [&](const llvm::Twine &Prefix) { 954 // Used by libc++ and libstdc++ to implement ATOMIC_<foo>_LOCK_FREE. 955 unsigned InlineWidthBits = TI.getMaxAtomicInlineWidth(); 956 #define DEFINE_LOCK_FREE_MACRO(TYPE, Type) \ 957 Builder.defineMacro(Prefix + #TYPE "_LOCK_FREE", \ 958 getLockFreeValue(TI.get##Type##Width(), \ 959 TI.get##Type##Align(), \ 960 InlineWidthBits)); 961 DEFINE_LOCK_FREE_MACRO(BOOL, Bool); 962 DEFINE_LOCK_FREE_MACRO(CHAR, Char); 963 if (LangOpts.Char8) 964 DEFINE_LOCK_FREE_MACRO(CHAR8_T, Char); // Treat char8_t like char. 965 DEFINE_LOCK_FREE_MACRO(CHAR16_T, Char16); 966 DEFINE_LOCK_FREE_MACRO(CHAR32_T, Char32); 967 DEFINE_LOCK_FREE_MACRO(WCHAR_T, WChar); 968 DEFINE_LOCK_FREE_MACRO(SHORT, Short); 969 DEFINE_LOCK_FREE_MACRO(INT, Int); 970 DEFINE_LOCK_FREE_MACRO(LONG, Long); 971 DEFINE_LOCK_FREE_MACRO(LLONG, LongLong); 972 Builder.defineMacro(Prefix + "POINTER_LOCK_FREE", 973 getLockFreeValue(TI.getPointerWidth(0), 974 TI.getPointerAlign(0), 975 InlineWidthBits)); 976 #undef DEFINE_LOCK_FREE_MACRO 977 }; 978 addLockFreeMacros("__CLANG_ATOMIC_"); 979 if (!LangOpts.MSVCCompat) 980 addLockFreeMacros("__GCC_ATOMIC_"); 981 982 if (LangOpts.NoInlineDefine) 983 Builder.defineMacro("__NO_INLINE__"); 984 985 if (unsigned PICLevel = LangOpts.PICLevel) { 986 Builder.defineMacro("__PIC__", Twine(PICLevel)); 987 Builder.defineMacro("__pic__", Twine(PICLevel)); 988 if (LangOpts.PIE) { 989 Builder.defineMacro("__PIE__", Twine(PICLevel)); 990 Builder.defineMacro("__pie__", Twine(PICLevel)); 991 } 992 } 993 994 // Macros to control C99 numerics and <float.h> 995 Builder.defineMacro("__FLT_EVAL_METHOD__", Twine(TI.getFloatEvalMethod())); 996 Builder.defineMacro("__FLT_RADIX__", "2"); 997 Builder.defineMacro("__DECIMAL_DIG__", "__LDBL_DECIMAL_DIG__"); 998 999 if (LangOpts.getStackProtector() == LangOptions::SSPOn) 1000 Builder.defineMacro("__SSP__"); 1001 else if (LangOpts.getStackProtector() == LangOptions::SSPStrong) 1002 Builder.defineMacro("__SSP_STRONG__", "2"); 1003 else if (LangOpts.getStackProtector() == LangOptions::SSPReq) 1004 Builder.defineMacro("__SSP_ALL__", "3"); 1005 1006 // Define a macro that exists only when using the static analyzer. 1007 if (FEOpts.ProgramAction == frontend::RunAnalysis) 1008 Builder.defineMacro("__clang_analyzer__"); 1009 1010 if (LangOpts.FastRelaxedMath) 1011 Builder.defineMacro("__FAST_RELAXED_MATH__"); 1012 1013 if (FEOpts.ProgramAction == frontend::RewriteObjC || 1014 LangOpts.getGC() != LangOptions::NonGC) { 1015 Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))"); 1016 Builder.defineMacro("__strong", "__attribute__((objc_gc(strong)))"); 1017 Builder.defineMacro("__autoreleasing", ""); 1018 Builder.defineMacro("__unsafe_unretained", ""); 1019 } else if (LangOpts.ObjC) { 1020 Builder.defineMacro("__weak", "__attribute__((objc_ownership(weak)))"); 1021 Builder.defineMacro("__strong", "__attribute__((objc_ownership(strong)))"); 1022 Builder.defineMacro("__autoreleasing", 1023 "__attribute__((objc_ownership(autoreleasing)))"); 1024 Builder.defineMacro("__unsafe_unretained", 1025 "__attribute__((objc_ownership(none)))"); 1026 } 1027 1028 // On Darwin, there are __double_underscored variants of the type 1029 // nullability qualifiers. 1030 if (TI.getTriple().isOSDarwin()) { 1031 Builder.defineMacro("__nonnull", "_Nonnull"); 1032 Builder.defineMacro("__null_unspecified", "_Null_unspecified"); 1033 Builder.defineMacro("__nullable", "_Nullable"); 1034 } 1035 1036 // Add a macro to differentiate between regular iOS/tvOS/watchOS targets and 1037 // the corresponding simulator targets. 1038 if (TI.getTriple().isOSDarwin() && TI.getTriple().isSimulatorEnvironment()) 1039 Builder.defineMacro("__APPLE_EMBEDDED_SIMULATOR__", "1"); 1040 1041 // OpenMP definition 1042 // OpenMP 2.2: 1043 // In implementations that support a preprocessor, the _OPENMP 1044 // macro name is defined to have the decimal value yyyymm where 1045 // yyyy and mm are the year and the month designations of the 1046 // version of the OpenMP API that the implementation support. 1047 if (!LangOpts.OpenMPSimd) { 1048 switch (LangOpts.OpenMP) { 1049 case 0: 1050 break; 1051 case 40: 1052 Builder.defineMacro("_OPENMP", "201307"); 1053 break; 1054 case 45: 1055 Builder.defineMacro("_OPENMP", "201511"); 1056 break; 1057 default: 1058 // Default version is OpenMP 3.1 1059 Builder.defineMacro("_OPENMP", "201107"); 1060 break; 1061 } 1062 } 1063 1064 // CUDA device path compilaton 1065 if (LangOpts.CUDAIsDevice && !LangOpts.HIP) { 1066 // The CUDA_ARCH value is set for the GPU target specified in the NVPTX 1067 // backend's target defines. 1068 Builder.defineMacro("__CUDA_ARCH__"); 1069 } 1070 1071 // We need to communicate this to our CUDA header wrapper, which in turn 1072 // informs the proper CUDA headers of this choice. 1073 if (LangOpts.CUDADeviceApproxTranscendentals || LangOpts.FastMath) { 1074 Builder.defineMacro("__CLANG_CUDA_APPROX_TRANSCENDENTALS__"); 1075 } 1076 1077 // OpenCL definitions. 1078 if (LangOpts.OpenCL) { 1079 #define OPENCLEXT(Ext) \ 1080 if (TI.getSupportedOpenCLOpts().isSupported(#Ext, \ 1081 LangOpts.OpenCLVersion)) \ 1082 Builder.defineMacro(#Ext); 1083 #include "clang/Basic/OpenCLExtensions.def" 1084 1085 auto Arch = TI.getTriple().getArch(); 1086 if (Arch == llvm::Triple::spir || Arch == llvm::Triple::spir64) 1087 Builder.defineMacro("__IMAGE_SUPPORT__"); 1088 } 1089 1090 if (TI.hasInt128Type() && LangOpts.CPlusPlus && LangOpts.GNUMode) { 1091 // For each extended integer type, g++ defines a macro mapping the 1092 // index of the type (0 in this case) in some list of extended types 1093 // to the type. 1094 Builder.defineMacro("__GLIBCXX_TYPE_INT_N_0", "__int128"); 1095 Builder.defineMacro("__GLIBCXX_BITSIZE_INT_N_0", "128"); 1096 } 1097 1098 // Get other target #defines. 1099 TI.getTargetDefines(LangOpts, Builder); 1100 } 1101 1102 /// InitializePreprocessor - Initialize the preprocessor getting it and the 1103 /// environment ready to process a single file. This returns true on error. 1104 /// 1105 void clang::InitializePreprocessor( 1106 Preprocessor &PP, const PreprocessorOptions &InitOpts, 1107 const PCHContainerReader &PCHContainerRdr, 1108 const FrontendOptions &FEOpts) { 1109 const LangOptions &LangOpts = PP.getLangOpts(); 1110 std::string PredefineBuffer; 1111 PredefineBuffer.reserve(4080); 1112 llvm::raw_string_ostream Predefines(PredefineBuffer); 1113 MacroBuilder Builder(Predefines); 1114 1115 // Emit line markers for various builtin sections of the file. We don't do 1116 // this in asm preprocessor mode, because "# 4" is not a line marker directive 1117 // in this mode. 1118 if (!PP.getLangOpts().AsmPreprocessor) 1119 Builder.append("# 1 \"<built-in>\" 3"); 1120 1121 // Install things like __POWERPC__, __GNUC__, etc into the macro table. 1122 if (InitOpts.UsePredefines) { 1123 // FIXME: This will create multiple definitions for most of the predefined 1124 // macros. This is not the right way to handle this. 1125 if ((LangOpts.CUDA || LangOpts.OpenMPIsDevice) && PP.getAuxTargetInfo()) 1126 InitializePredefinedMacros(*PP.getAuxTargetInfo(), LangOpts, FEOpts, 1127 Builder); 1128 1129 InitializePredefinedMacros(PP.getTargetInfo(), LangOpts, FEOpts, Builder); 1130 1131 // Install definitions to make Objective-C++ ARC work well with various 1132 // C++ Standard Library implementations. 1133 if (LangOpts.ObjC && LangOpts.CPlusPlus && 1134 (LangOpts.ObjCAutoRefCount || LangOpts.ObjCWeak)) { 1135 switch (InitOpts.ObjCXXARCStandardLibrary) { 1136 case ARCXX_nolib: 1137 case ARCXX_libcxx: 1138 break; 1139 1140 case ARCXX_libstdcxx: 1141 AddObjCXXARCLibstdcxxDefines(LangOpts, Builder); 1142 break; 1143 } 1144 } 1145 } 1146 1147 // Even with predefines off, some macros are still predefined. 1148 // These should all be defined in the preprocessor according to the 1149 // current language configuration. 1150 InitializeStandardPredefinedMacros(PP.getTargetInfo(), PP.getLangOpts(), 1151 FEOpts, Builder); 1152 1153 // Add on the predefines from the driver. Wrap in a #line directive to report 1154 // that they come from the command line. 1155 if (!PP.getLangOpts().AsmPreprocessor) 1156 Builder.append("# 1 \"<command line>\" 1"); 1157 1158 // Process #define's and #undef's in the order they are given. 1159 for (unsigned i = 0, e = InitOpts.Macros.size(); i != e; ++i) { 1160 if (InitOpts.Macros[i].second) // isUndef 1161 Builder.undefineMacro(InitOpts.Macros[i].first); 1162 else 1163 DefineBuiltinMacro(Builder, InitOpts.Macros[i].first, 1164 PP.getDiagnostics()); 1165 } 1166 1167 // Exit the command line and go back to <built-in> (2 is LC_LEAVE). 1168 if (!PP.getLangOpts().AsmPreprocessor) 1169 Builder.append("# 1 \"<built-in>\" 2"); 1170 1171 // If -imacros are specified, include them now. These are processed before 1172 // any -include directives. 1173 for (unsigned i = 0, e = InitOpts.MacroIncludes.size(); i != e; ++i) 1174 AddImplicitIncludeMacros(Builder, InitOpts.MacroIncludes[i]); 1175 1176 // Process -include-pch/-include-pth directives. 1177 if (!InitOpts.ImplicitPCHInclude.empty()) 1178 AddImplicitIncludePCH(Builder, PP, PCHContainerRdr, 1179 InitOpts.ImplicitPCHInclude); 1180 if (!InitOpts.ImplicitPTHInclude.empty()) 1181 AddImplicitIncludePTH(Builder, PP, InitOpts.ImplicitPTHInclude); 1182 1183 // Process -include directives. 1184 for (unsigned i = 0, e = InitOpts.Includes.size(); i != e; ++i) { 1185 const std::string &Path = InitOpts.Includes[i]; 1186 AddImplicitInclude(Builder, Path); 1187 } 1188 1189 // Instruct the preprocessor to skip the preamble. 1190 PP.setSkipMainFilePreamble(InitOpts.PrecompiledPreambleBytes.first, 1191 InitOpts.PrecompiledPreambleBytes.second); 1192 1193 // Copy PredefinedBuffer into the Preprocessor. 1194 PP.setPredefines(Predefines.str()); 1195 } 1196