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 IEEESingleVal, 114 T IEEEDoubleVal, T X87DoubleExtendedVal, T PPCDoubleDoubleVal, 115 T IEEEQuadVal) { 116 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEsingle()) 117 return IEEESingleVal; 118 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEdouble()) 119 return IEEEDoubleVal; 120 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::x87DoubleExtended()) 121 return X87DoubleExtendedVal; 122 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::PPCDoubleDouble()) 123 return PPCDoubleDoubleVal; 124 assert(Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEquad()); 125 return IEEEQuadVal; 126 } 127 128 static void DefineFloatMacros(MacroBuilder &Builder, StringRef Prefix, 129 const llvm::fltSemantics *Sem, StringRef Ext) { 130 const char *DenormMin, *Epsilon, *Max, *Min; 131 DenormMin = PickFP(Sem, "1.40129846e-45", "4.9406564584124654e-324", 132 "3.64519953188247460253e-4951", 133 "4.94065645841246544176568792868221e-324", 134 "6.47517511943802511092443895822764655e-4966"); 135 int Digits = PickFP(Sem, 6, 15, 18, 31, 33); 136 int DecimalDigits = PickFP(Sem, 9, 17, 21, 33, 36); 137 Epsilon = PickFP(Sem, "1.19209290e-7", "2.2204460492503131e-16", 138 "1.08420217248550443401e-19", 139 "4.94065645841246544176568792868221e-324", 140 "1.92592994438723585305597794258492732e-34"); 141 int MantissaDigits = PickFP(Sem, 24, 53, 64, 106, 113); 142 int Min10Exp = PickFP(Sem, -37, -307, -4931, -291, -4931); 143 int Max10Exp = PickFP(Sem, 38, 308, 4932, 308, 4932); 144 int MinExp = PickFP(Sem, -125, -1021, -16381, -968, -16381); 145 int MaxExp = PickFP(Sem, 128, 1024, 16384, 1024, 16384); 146 Min = PickFP(Sem, "1.17549435e-38", "2.2250738585072014e-308", 147 "3.36210314311209350626e-4932", 148 "2.00416836000897277799610805135016e-292", 149 "3.36210314311209350626267781732175260e-4932"); 150 Max = PickFP(Sem, "3.40282347e+38", "1.7976931348623157e+308", 151 "1.18973149535723176502e+4932", 152 "1.79769313486231580793728971405301e+308", 153 "1.18973149535723176508575932662800702e+4932"); 154 155 SmallString<32> DefPrefix; 156 DefPrefix = "__"; 157 DefPrefix += Prefix; 158 DefPrefix += "_"; 159 160 Builder.defineMacro(DefPrefix + "DENORM_MIN__", Twine(DenormMin)+Ext); 161 Builder.defineMacro(DefPrefix + "HAS_DENORM__"); 162 Builder.defineMacro(DefPrefix + "DIG__", Twine(Digits)); 163 Builder.defineMacro(DefPrefix + "DECIMAL_DIG__", Twine(DecimalDigits)); 164 Builder.defineMacro(DefPrefix + "EPSILON__", Twine(Epsilon)+Ext); 165 Builder.defineMacro(DefPrefix + "HAS_INFINITY__"); 166 Builder.defineMacro(DefPrefix + "HAS_QUIET_NAN__"); 167 Builder.defineMacro(DefPrefix + "MANT_DIG__", Twine(MantissaDigits)); 168 169 Builder.defineMacro(DefPrefix + "MAX_10_EXP__", Twine(Max10Exp)); 170 Builder.defineMacro(DefPrefix + "MAX_EXP__", Twine(MaxExp)); 171 Builder.defineMacro(DefPrefix + "MAX__", Twine(Max)+Ext); 172 173 Builder.defineMacro(DefPrefix + "MIN_10_EXP__","("+Twine(Min10Exp)+")"); 174 Builder.defineMacro(DefPrefix + "MIN_EXP__", "("+Twine(MinExp)+")"); 175 Builder.defineMacro(DefPrefix + "MIN__", Twine(Min)+Ext); 176 } 177 178 179 /// DefineTypeSize - Emit a macro to the predefines buffer that declares a macro 180 /// named MacroName with the max value for a type with width 'TypeWidth' a 181 /// signedness of 'isSigned' and with a value suffix of 'ValSuffix' (e.g. LL). 182 static void DefineTypeSize(const Twine &MacroName, unsigned TypeWidth, 183 StringRef ValSuffix, bool isSigned, 184 MacroBuilder &Builder) { 185 llvm::APInt MaxVal = isSigned ? llvm::APInt::getSignedMaxValue(TypeWidth) 186 : llvm::APInt::getMaxValue(TypeWidth); 187 Builder.defineMacro(MacroName, MaxVal.toString(10, isSigned) + ValSuffix); 188 } 189 190 /// DefineTypeSize - An overloaded helper that uses TargetInfo to determine 191 /// the width, suffix, and signedness of the given type 192 static void DefineTypeSize(const Twine &MacroName, TargetInfo::IntType Ty, 193 const TargetInfo &TI, MacroBuilder &Builder) { 194 DefineTypeSize(MacroName, TI.getTypeWidth(Ty), TI.getTypeConstantSuffix(Ty), 195 TI.isTypeSigned(Ty), Builder); 196 } 197 198 static void DefineFmt(const Twine &Prefix, TargetInfo::IntType Ty, 199 const TargetInfo &TI, MacroBuilder &Builder) { 200 bool IsSigned = TI.isTypeSigned(Ty); 201 StringRef FmtModifier = TI.getTypeFormatModifier(Ty); 202 for (const char *Fmt = IsSigned ? "di" : "ouxX"; *Fmt; ++Fmt) { 203 Builder.defineMacro(Prefix + "_FMT" + Twine(*Fmt) + "__", 204 Twine("\"") + FmtModifier + Twine(*Fmt) + "\""); 205 } 206 } 207 208 static void DefineType(const Twine &MacroName, TargetInfo::IntType Ty, 209 MacroBuilder &Builder) { 210 Builder.defineMacro(MacroName, TargetInfo::getTypeName(Ty)); 211 } 212 213 static void DefineTypeWidth(StringRef MacroName, TargetInfo::IntType Ty, 214 const TargetInfo &TI, MacroBuilder &Builder) { 215 Builder.defineMacro(MacroName, Twine(TI.getTypeWidth(Ty))); 216 } 217 218 static void DefineTypeSizeof(StringRef MacroName, unsigned BitWidth, 219 const TargetInfo &TI, MacroBuilder &Builder) { 220 Builder.defineMacro(MacroName, 221 Twine(BitWidth / TI.getCharWidth())); 222 } 223 224 static void DefineExactWidthIntType(TargetInfo::IntType Ty, 225 const TargetInfo &TI, 226 MacroBuilder &Builder) { 227 int TypeWidth = TI.getTypeWidth(Ty); 228 bool IsSigned = TI.isTypeSigned(Ty); 229 230 // Use the target specified int64 type, when appropriate, so that [u]int64_t 231 // ends up being defined in terms of the correct type. 232 if (TypeWidth == 64) 233 Ty = IsSigned ? TI.getInt64Type() : TI.getUInt64Type(); 234 235 const char *Prefix = IsSigned ? "__INT" : "__UINT"; 236 237 DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder); 238 DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder); 239 240 StringRef ConstSuffix(TI.getTypeConstantSuffix(Ty)); 241 Builder.defineMacro(Prefix + Twine(TypeWidth) + "_C_SUFFIX__", ConstSuffix); 242 } 243 244 static void DefineExactWidthIntTypeSize(TargetInfo::IntType Ty, 245 const TargetInfo &TI, 246 MacroBuilder &Builder) { 247 int TypeWidth = TI.getTypeWidth(Ty); 248 bool IsSigned = TI.isTypeSigned(Ty); 249 250 // Use the target specified int64 type, when appropriate, so that [u]int64_t 251 // ends up being defined in terms of the correct type. 252 if (TypeWidth == 64) 253 Ty = IsSigned ? TI.getInt64Type() : TI.getUInt64Type(); 254 255 const char *Prefix = IsSigned ? "__INT" : "__UINT"; 256 DefineTypeSize(Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder); 257 } 258 259 static void DefineLeastWidthIntType(unsigned TypeWidth, bool IsSigned, 260 const TargetInfo &TI, 261 MacroBuilder &Builder) { 262 TargetInfo::IntType Ty = TI.getLeastIntTypeByWidth(TypeWidth, IsSigned); 263 if (Ty == TargetInfo::NoInt) 264 return; 265 266 const char *Prefix = IsSigned ? "__INT_LEAST" : "__UINT_LEAST"; 267 DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder); 268 DefineTypeSize(Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder); 269 DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder); 270 } 271 272 static void DefineFastIntType(unsigned TypeWidth, bool IsSigned, 273 const TargetInfo &TI, MacroBuilder &Builder) { 274 // stdint.h currently defines the fast int types as equivalent to the least 275 // types. 276 TargetInfo::IntType Ty = TI.getLeastIntTypeByWidth(TypeWidth, IsSigned); 277 if (Ty == TargetInfo::NoInt) 278 return; 279 280 const char *Prefix = IsSigned ? "__INT_FAST" : "__UINT_FAST"; 281 DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder); 282 DefineTypeSize(Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder); 283 284 DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder); 285 } 286 287 288 /// Get the value the ATOMIC_*_LOCK_FREE macro should have for a type with 289 /// the specified properties. 290 static const char *getLockFreeValue(unsigned TypeWidth, unsigned TypeAlign, 291 unsigned InlineWidth) { 292 // Fully-aligned, power-of-2 sizes no larger than the inline 293 // width will be inlined as lock-free operations. 294 if (TypeWidth == TypeAlign && (TypeWidth & (TypeWidth - 1)) == 0 && 295 TypeWidth <= InlineWidth) 296 return "2"; // "always lock free" 297 // We cannot be certain what operations the lib calls might be 298 // able to implement as lock-free on future processors. 299 return "1"; // "sometimes lock free" 300 } 301 302 /// \brief Add definitions required for a smooth interaction between 303 /// Objective-C++ automated reference counting and libstdc++ (4.2). 304 static void AddObjCXXARCLibstdcxxDefines(const LangOptions &LangOpts, 305 MacroBuilder &Builder) { 306 Builder.defineMacro("_GLIBCXX_PREDEFINED_OBJC_ARC_IS_SCALAR"); 307 308 std::string Result; 309 { 310 // Provide specializations for the __is_scalar type trait so that 311 // lifetime-qualified objects are not considered "scalar" types, which 312 // libstdc++ uses as an indicator of the presence of trivial copy, assign, 313 // default-construct, and destruct semantics (none of which hold for 314 // lifetime-qualified objects in ARC). 315 llvm::raw_string_ostream Out(Result); 316 317 Out << "namespace std {\n" 318 << "\n" 319 << "struct __true_type;\n" 320 << "struct __false_type;\n" 321 << "\n"; 322 323 Out << "template<typename _Tp> struct __is_scalar;\n" 324 << "\n"; 325 326 if (LangOpts.ObjCAutoRefCount) { 327 Out << "template<typename _Tp>\n" 328 << "struct __is_scalar<__attribute__((objc_ownership(strong))) _Tp> {\n" 329 << " enum { __value = 0 };\n" 330 << " typedef __false_type __type;\n" 331 << "};\n" 332 << "\n"; 333 } 334 335 if (LangOpts.ObjCWeak) { 336 Out << "template<typename _Tp>\n" 337 << "struct __is_scalar<__attribute__((objc_ownership(weak))) _Tp> {\n" 338 << " enum { __value = 0 };\n" 339 << " typedef __false_type __type;\n" 340 << "};\n" 341 << "\n"; 342 } 343 344 if (LangOpts.ObjCAutoRefCount) { 345 Out << "template<typename _Tp>\n" 346 << "struct __is_scalar<__attribute__((objc_ownership(autoreleasing)))" 347 << " _Tp> {\n" 348 << " enum { __value = 0 };\n" 349 << " typedef __false_type __type;\n" 350 << "};\n" 351 << "\n"; 352 } 353 354 Out << "}\n"; 355 } 356 Builder.append(Result); 357 } 358 359 static void InitializeStandardPredefinedMacros(const TargetInfo &TI, 360 const LangOptions &LangOpts, 361 const FrontendOptions &FEOpts, 362 MacroBuilder &Builder) { 363 if (!LangOpts.MSVCCompat && !LangOpts.TraditionalCPP) 364 Builder.defineMacro("__STDC__"); 365 if (LangOpts.Freestanding) 366 Builder.defineMacro("__STDC_HOSTED__", "0"); 367 else 368 Builder.defineMacro("__STDC_HOSTED__"); 369 370 if (!LangOpts.CPlusPlus) { 371 if (LangOpts.C11) 372 Builder.defineMacro("__STDC_VERSION__", "201112L"); 373 else if (LangOpts.C99) 374 Builder.defineMacro("__STDC_VERSION__", "199901L"); 375 else if (!LangOpts.GNUMode && LangOpts.Digraphs) 376 Builder.defineMacro("__STDC_VERSION__", "199409L"); 377 } else { 378 // FIXME: Use correct value for C++20. 379 if (LangOpts.CPlusPlus2a) 380 Builder.defineMacro("__cplusplus", "201707L"); 381 // C++17 [cpp.predefined]p1: 382 // The name __cplusplus is defined to the value 201703L when compiling a 383 // C++ translation unit. 384 else if (LangOpts.CPlusPlus1z) 385 Builder.defineMacro("__cplusplus", "201703L"); 386 // C++1y [cpp.predefined]p1: 387 // The name __cplusplus is defined to the value 201402L when compiling a 388 // C++ translation unit. 389 else if (LangOpts.CPlusPlus14) 390 Builder.defineMacro("__cplusplus", "201402L"); 391 // C++11 [cpp.predefined]p1: 392 // The name __cplusplus is defined to the value 201103L when compiling a 393 // C++ translation unit. 394 else if (LangOpts.CPlusPlus11) 395 Builder.defineMacro("__cplusplus", "201103L"); 396 // C++03 [cpp.predefined]p1: 397 // The name __cplusplus is defined to the value 199711L when compiling a 398 // C++ translation unit. 399 else 400 Builder.defineMacro("__cplusplus", "199711L"); 401 402 // C++1z [cpp.predefined]p1: 403 // An integer literal of type std::size_t whose value is the alignment 404 // guaranteed by a call to operator new(std::size_t) 405 // 406 // We provide this in all language modes, since it seems generally useful. 407 Builder.defineMacro("__STDCPP_DEFAULT_NEW_ALIGNMENT__", 408 Twine(TI.getNewAlign() / TI.getCharWidth()) + 409 TI.getTypeConstantSuffix(TI.getSizeType())); 410 } 411 412 // In C11 these are environment macros. In C++11 they are only defined 413 // as part of <cuchar>. To prevent breakage when mixing C and C++ 414 // code, define these macros unconditionally. We can define them 415 // unconditionally, as Clang always uses UTF-16 and UTF-32 for 16-bit 416 // and 32-bit character literals. 417 Builder.defineMacro("__STDC_UTF_16__", "1"); 418 Builder.defineMacro("__STDC_UTF_32__", "1"); 419 420 if (LangOpts.ObjC1) 421 Builder.defineMacro("__OBJC__"); 422 423 // OpenCL v1.0/1.1 s6.9, v1.2/2.0 s6.10: Preprocessor Directives and Macros. 424 if (LangOpts.OpenCL) { 425 // OpenCL v1.0 and v1.1 do not have a predefined macro to indicate the 426 // language standard with which the program is compiled. __OPENCL_VERSION__ 427 // is for the OpenCL version supported by the OpenCL device, which is not 428 // necessarily the language standard with which the program is compiled. 429 // A shared OpenCL header file requires a macro to indicate the language 430 // standard. As a workaround, __OPENCL_C_VERSION__ is defined for 431 // OpenCL v1.0 and v1.1. 432 switch (LangOpts.OpenCLVersion) { 433 case 100: 434 Builder.defineMacro("__OPENCL_C_VERSION__", "100"); 435 break; 436 case 110: 437 Builder.defineMacro("__OPENCL_C_VERSION__", "110"); 438 break; 439 case 120: 440 Builder.defineMacro("__OPENCL_C_VERSION__", "120"); 441 break; 442 case 200: 443 Builder.defineMacro("__OPENCL_C_VERSION__", "200"); 444 break; 445 default: 446 llvm_unreachable("Unsupported OpenCL version"); 447 } 448 Builder.defineMacro("CL_VERSION_1_0", "100"); 449 Builder.defineMacro("CL_VERSION_1_1", "110"); 450 Builder.defineMacro("CL_VERSION_1_2", "120"); 451 Builder.defineMacro("CL_VERSION_2_0", "200"); 452 453 if (TI.isLittleEndian()) 454 Builder.defineMacro("__ENDIAN_LITTLE__"); 455 456 if (LangOpts.FastRelaxedMath) 457 Builder.defineMacro("__FAST_RELAXED_MATH__"); 458 } 459 // Not "standard" per se, but available even with the -undef flag. 460 if (LangOpts.AsmPreprocessor) 461 Builder.defineMacro("__ASSEMBLER__"); 462 if (LangOpts.CUDA) 463 Builder.defineMacro("__CUDA__"); 464 } 465 466 /// Initialize the predefined C++ language feature test macros defined in 467 /// ISO/IEC JTC1/SC22/WG21 (C++) SD-6: "SG10 Feature Test Recommendations". 468 static void InitializeCPlusPlusFeatureTestMacros(const LangOptions &LangOpts, 469 MacroBuilder &Builder) { 470 // C++98 features. 471 if (LangOpts.RTTI) 472 Builder.defineMacro("__cpp_rtti", "199711"); 473 if (LangOpts.CXXExceptions) 474 Builder.defineMacro("__cpp_exceptions", "199711"); 475 476 // C++11 features. 477 if (LangOpts.CPlusPlus11) { 478 Builder.defineMacro("__cpp_unicode_characters", "200704"); 479 Builder.defineMacro("__cpp_raw_strings", "200710"); 480 Builder.defineMacro("__cpp_unicode_literals", "200710"); 481 Builder.defineMacro("__cpp_user_defined_literals", "200809"); 482 Builder.defineMacro("__cpp_lambdas", "200907"); 483 Builder.defineMacro("__cpp_constexpr", 484 LangOpts.CPlusPlus1z ? "201603" : 485 LangOpts.CPlusPlus14 ? "201304" : "200704"); 486 Builder.defineMacro("__cpp_range_based_for", 487 LangOpts.CPlusPlus1z ? "201603" : "200907"); 488 Builder.defineMacro("__cpp_static_assert", 489 LangOpts.CPlusPlus1z ? "201411" : "200410"); 490 Builder.defineMacro("__cpp_decltype", "200707"); 491 Builder.defineMacro("__cpp_attributes", "200809"); 492 Builder.defineMacro("__cpp_rvalue_references", "200610"); 493 Builder.defineMacro("__cpp_variadic_templates", "200704"); 494 Builder.defineMacro("__cpp_initializer_lists", "200806"); 495 Builder.defineMacro("__cpp_delegating_constructors", "200604"); 496 Builder.defineMacro("__cpp_nsdmi", "200809"); 497 Builder.defineMacro("__cpp_inheriting_constructors", "201511"); 498 Builder.defineMacro("__cpp_ref_qualifiers", "200710"); 499 Builder.defineMacro("__cpp_alias_templates", "200704"); 500 } 501 if (LangOpts.ThreadsafeStatics) 502 Builder.defineMacro("__cpp_threadsafe_static_init", "200806"); 503 504 // C++14 features. 505 if (LangOpts.CPlusPlus14) { 506 Builder.defineMacro("__cpp_binary_literals", "201304"); 507 Builder.defineMacro("__cpp_digit_separators", "201309"); 508 Builder.defineMacro("__cpp_init_captures", "201304"); 509 Builder.defineMacro("__cpp_generic_lambdas", "201304"); 510 Builder.defineMacro("__cpp_decltype_auto", "201304"); 511 Builder.defineMacro("__cpp_return_type_deduction", "201304"); 512 Builder.defineMacro("__cpp_aggregate_nsdmi", "201304"); 513 Builder.defineMacro("__cpp_variable_templates", "201304"); 514 } 515 if (LangOpts.SizedDeallocation) 516 Builder.defineMacro("__cpp_sized_deallocation", "201309"); 517 518 // C++17 features. 519 if (LangOpts.CPlusPlus1z) { 520 Builder.defineMacro("__cpp_hex_float", "201603"); 521 Builder.defineMacro("__cpp_inline_variables", "201606"); 522 Builder.defineMacro("__cpp_noexcept_function_type", "201510"); 523 Builder.defineMacro("__cpp_capture_star_this", "201603"); 524 Builder.defineMacro("__cpp_if_constexpr", "201606"); 525 Builder.defineMacro("__cpp_deduction_guides", "201611"); 526 Builder.defineMacro("__cpp_template_auto", "201606"); 527 Builder.defineMacro("__cpp_namespace_attributes", "201411"); 528 Builder.defineMacro("__cpp_enumerator_attributes", "201411"); 529 Builder.defineMacro("__cpp_nested_namespace_definitions", "201411"); 530 Builder.defineMacro("__cpp_variadic_using", "201611"); 531 Builder.defineMacro("__cpp_aggregate_bases", "201603"); 532 Builder.defineMacro("__cpp_structured_bindings", "201606"); 533 Builder.defineMacro("__cpp_nontype_template_args", "201411"); 534 Builder.defineMacro("__cpp_fold_expressions", "201603"); 535 } 536 if (LangOpts.AlignedAllocation) 537 Builder.defineMacro("__cpp_aligned_new", "201606"); 538 539 // TS features. 540 if (LangOpts.ConceptsTS) 541 Builder.defineMacro("__cpp_experimental_concepts", "1"); 542 if (LangOpts.CoroutinesTS) 543 Builder.defineMacro("__cpp_coroutines", "201703L"); 544 } 545 546 static void InitializePredefinedMacros(const TargetInfo &TI, 547 const LangOptions &LangOpts, 548 const FrontendOptions &FEOpts, 549 MacroBuilder &Builder) { 550 // Compiler version introspection macros. 551 Builder.defineMacro("__llvm__"); // LLVM Backend 552 Builder.defineMacro("__clang__"); // Clang Frontend 553 #define TOSTR2(X) #X 554 #define TOSTR(X) TOSTR2(X) 555 Builder.defineMacro("__clang_major__", TOSTR(CLANG_VERSION_MAJOR)); 556 Builder.defineMacro("__clang_minor__", TOSTR(CLANG_VERSION_MINOR)); 557 Builder.defineMacro("__clang_patchlevel__", TOSTR(CLANG_VERSION_PATCHLEVEL)); 558 #undef TOSTR 559 #undef TOSTR2 560 Builder.defineMacro("__clang_version__", 561 "\"" CLANG_VERSION_STRING " " 562 + getClangFullRepositoryVersion() + "\""); 563 if (!LangOpts.MSVCCompat) { 564 // Currently claim to be compatible with GCC 4.2.1-5621, but only if we're 565 // not compiling for MSVC compatibility 566 Builder.defineMacro("__GNUC_MINOR__", "2"); 567 Builder.defineMacro("__GNUC_PATCHLEVEL__", "1"); 568 Builder.defineMacro("__GNUC__", "4"); 569 Builder.defineMacro("__GXX_ABI_VERSION", "1002"); 570 } 571 572 // Define macros for the C11 / C++11 memory orderings 573 Builder.defineMacro("__ATOMIC_RELAXED", "0"); 574 Builder.defineMacro("__ATOMIC_CONSUME", "1"); 575 Builder.defineMacro("__ATOMIC_ACQUIRE", "2"); 576 Builder.defineMacro("__ATOMIC_RELEASE", "3"); 577 Builder.defineMacro("__ATOMIC_ACQ_REL", "4"); 578 Builder.defineMacro("__ATOMIC_SEQ_CST", "5"); 579 580 // Define macros for the OpenCL memory scope. 581 // The values should match clang SyncScope enum. 582 assert(static_cast<unsigned>(SyncScope::OpenCLWorkGroup) == 1 && 583 static_cast<unsigned>(SyncScope::OpenCLDevice) == 2 && 584 static_cast<unsigned>(SyncScope::OpenCLAllSVMDevices) == 3 && 585 static_cast<unsigned>(SyncScope::OpenCLSubGroup) == 4); 586 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_WORK_ITEM", "0"); 587 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_WORK_GROUP", "1"); 588 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_DEVICE", "2"); 589 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_ALL_SVM_DEVICES", "3"); 590 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_SUB_GROUP", "4"); 591 592 // Support for #pragma redefine_extname (Sun compatibility) 593 Builder.defineMacro("__PRAGMA_REDEFINE_EXTNAME", "1"); 594 595 // As sad as it is, enough software depends on the __VERSION__ for version 596 // checks that it is necessary to report 4.2.1 (the base GCC version we claim 597 // compatibility with) first. 598 Builder.defineMacro("__VERSION__", "\"4.2.1 Compatible " + 599 Twine(getClangFullCPPVersion()) + "\""); 600 601 // Initialize language-specific preprocessor defines. 602 603 // Standard conforming mode? 604 if (!LangOpts.GNUMode && !LangOpts.MSVCCompat) 605 Builder.defineMacro("__STRICT_ANSI__"); 606 607 if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus11) 608 Builder.defineMacro("__GXX_EXPERIMENTAL_CXX0X__"); 609 610 if (LangOpts.ObjC1) { 611 if (LangOpts.ObjCRuntime.isNonFragile()) { 612 Builder.defineMacro("__OBJC2__"); 613 614 if (LangOpts.ObjCExceptions) 615 Builder.defineMacro("OBJC_ZEROCOST_EXCEPTIONS"); 616 } 617 618 if (LangOpts.getGC() != LangOptions::NonGC) 619 Builder.defineMacro("__OBJC_GC__"); 620 621 if (LangOpts.ObjCRuntime.isNeXTFamily()) 622 Builder.defineMacro("__NEXT_RUNTIME__"); 623 624 if (LangOpts.ObjCRuntime.getKind() == ObjCRuntime::ObjFW) { 625 VersionTuple tuple = LangOpts.ObjCRuntime.getVersion(); 626 627 unsigned minor = 0; 628 if (tuple.getMinor().hasValue()) 629 minor = tuple.getMinor().getValue(); 630 631 unsigned subminor = 0; 632 if (tuple.getSubminor().hasValue()) 633 subminor = tuple.getSubminor().getValue(); 634 635 Builder.defineMacro("__OBJFW_RUNTIME_ABI__", 636 Twine(tuple.getMajor() * 10000 + minor * 100 + 637 subminor)); 638 } 639 640 Builder.defineMacro("IBOutlet", "__attribute__((iboutlet))"); 641 Builder.defineMacro("IBOutletCollection(ClassName)", 642 "__attribute__((iboutletcollection(ClassName)))"); 643 Builder.defineMacro("IBAction", "void)__attribute__((ibaction)"); 644 Builder.defineMacro("IBInspectable", ""); 645 Builder.defineMacro("IB_DESIGNABLE", ""); 646 } 647 648 // Define a macro that describes the Objective-C boolean type even for C 649 // and C++ since BOOL can be used from non Objective-C code. 650 Builder.defineMacro("__OBJC_BOOL_IS_BOOL", 651 Twine(TI.useSignedCharForObjCBool() ? "0" : "1")); 652 653 if (LangOpts.CPlusPlus) 654 InitializeCPlusPlusFeatureTestMacros(LangOpts, Builder); 655 656 // darwin_constant_cfstrings controls this. This is also dependent 657 // on other things like the runtime I believe. This is set even for C code. 658 if (!LangOpts.NoConstantCFStrings) 659 Builder.defineMacro("__CONSTANT_CFSTRINGS__"); 660 661 if (LangOpts.ObjC2) 662 Builder.defineMacro("OBJC_NEW_PROPERTIES"); 663 664 if (LangOpts.PascalStrings) 665 Builder.defineMacro("__PASCAL_STRINGS__"); 666 667 if (LangOpts.Blocks) { 668 Builder.defineMacro("__block", "__attribute__((__blocks__(byref)))"); 669 Builder.defineMacro("__BLOCKS__"); 670 } 671 672 if (!LangOpts.MSVCCompat && LangOpts.Exceptions) 673 Builder.defineMacro("__EXCEPTIONS"); 674 if (!LangOpts.MSVCCompat && LangOpts.RTTI) 675 Builder.defineMacro("__GXX_RTTI"); 676 if (LangOpts.SjLjExceptions) 677 Builder.defineMacro("__USING_SJLJ_EXCEPTIONS__"); 678 679 if (LangOpts.Deprecated) 680 Builder.defineMacro("__DEPRECATED"); 681 682 if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus) { 683 Builder.defineMacro("__GNUG__", "4"); 684 Builder.defineMacro("__GXX_WEAK__"); 685 Builder.defineMacro("__private_extern__", "extern"); 686 } 687 688 if (LangOpts.MicrosoftExt) { 689 if (LangOpts.WChar) { 690 // wchar_t supported as a keyword. 691 Builder.defineMacro("_WCHAR_T_DEFINED"); 692 Builder.defineMacro("_NATIVE_WCHAR_T_DEFINED"); 693 } 694 } 695 696 if (LangOpts.Optimize) 697 Builder.defineMacro("__OPTIMIZE__"); 698 if (LangOpts.OptimizeSize) 699 Builder.defineMacro("__OPTIMIZE_SIZE__"); 700 701 if (LangOpts.FastMath) 702 Builder.defineMacro("__FAST_MATH__"); 703 704 // Initialize target-specific preprocessor defines. 705 706 // __BYTE_ORDER__ was added in GCC 4.6. It's analogous 707 // to the macro __BYTE_ORDER (no trailing underscores) 708 // from glibc's <endian.h> header. 709 // We don't support the PDP-11 as a target, but include 710 // the define so it can still be compared against. 711 Builder.defineMacro("__ORDER_LITTLE_ENDIAN__", "1234"); 712 Builder.defineMacro("__ORDER_BIG_ENDIAN__", "4321"); 713 Builder.defineMacro("__ORDER_PDP_ENDIAN__", "3412"); 714 if (TI.isBigEndian()) { 715 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_BIG_ENDIAN__"); 716 Builder.defineMacro("__BIG_ENDIAN__"); 717 } else { 718 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_LITTLE_ENDIAN__"); 719 Builder.defineMacro("__LITTLE_ENDIAN__"); 720 } 721 722 if (TI.getPointerWidth(0) == 64 && TI.getLongWidth() == 64 723 && TI.getIntWidth() == 32) { 724 Builder.defineMacro("_LP64"); 725 Builder.defineMacro("__LP64__"); 726 } 727 728 if (TI.getPointerWidth(0) == 32 && TI.getLongWidth() == 32 729 && TI.getIntWidth() == 32) { 730 Builder.defineMacro("_ILP32"); 731 Builder.defineMacro("__ILP32__"); 732 } 733 734 // Define type sizing macros based on the target properties. 735 assert(TI.getCharWidth() == 8 && "Only support 8-bit char so far"); 736 Builder.defineMacro("__CHAR_BIT__", Twine(TI.getCharWidth())); 737 738 DefineTypeSize("__SCHAR_MAX__", TargetInfo::SignedChar, TI, Builder); 739 DefineTypeSize("__SHRT_MAX__", TargetInfo::SignedShort, TI, Builder); 740 DefineTypeSize("__INT_MAX__", TargetInfo::SignedInt, TI, Builder); 741 DefineTypeSize("__LONG_MAX__", TargetInfo::SignedLong, TI, Builder); 742 DefineTypeSize("__LONG_LONG_MAX__", TargetInfo::SignedLongLong, TI, Builder); 743 DefineTypeSize("__WCHAR_MAX__", TI.getWCharType(), TI, Builder); 744 DefineTypeSize("__INTMAX_MAX__", TI.getIntMaxType(), TI, Builder); 745 DefineTypeSize("__SIZE_MAX__", TI.getSizeType(), TI, Builder); 746 747 DefineTypeSize("__UINTMAX_MAX__", TI.getUIntMaxType(), TI, Builder); 748 DefineTypeSize("__PTRDIFF_MAX__", TI.getPtrDiffType(0), TI, Builder); 749 DefineTypeSize("__INTPTR_MAX__", TI.getIntPtrType(), TI, Builder); 750 DefineTypeSize("__UINTPTR_MAX__", TI.getUIntPtrType(), TI, Builder); 751 752 DefineTypeSizeof("__SIZEOF_DOUBLE__", TI.getDoubleWidth(), TI, Builder); 753 DefineTypeSizeof("__SIZEOF_FLOAT__", TI.getFloatWidth(), TI, Builder); 754 DefineTypeSizeof("__SIZEOF_INT__", TI.getIntWidth(), TI, Builder); 755 DefineTypeSizeof("__SIZEOF_LONG__", TI.getLongWidth(), TI, Builder); 756 DefineTypeSizeof("__SIZEOF_LONG_DOUBLE__",TI.getLongDoubleWidth(),TI,Builder); 757 DefineTypeSizeof("__SIZEOF_LONG_LONG__", TI.getLongLongWidth(), TI, Builder); 758 DefineTypeSizeof("__SIZEOF_POINTER__", TI.getPointerWidth(0), TI, Builder); 759 DefineTypeSizeof("__SIZEOF_SHORT__", TI.getShortWidth(), TI, Builder); 760 DefineTypeSizeof("__SIZEOF_PTRDIFF_T__", 761 TI.getTypeWidth(TI.getPtrDiffType(0)), TI, Builder); 762 DefineTypeSizeof("__SIZEOF_SIZE_T__", 763 TI.getTypeWidth(TI.getSizeType()), TI, Builder); 764 DefineTypeSizeof("__SIZEOF_WCHAR_T__", 765 TI.getTypeWidth(TI.getWCharType()), TI, Builder); 766 DefineTypeSizeof("__SIZEOF_WINT_T__", 767 TI.getTypeWidth(TI.getWIntType()), TI, Builder); 768 if (TI.hasInt128Type()) 769 DefineTypeSizeof("__SIZEOF_INT128__", 128, TI, Builder); 770 771 DefineType("__INTMAX_TYPE__", TI.getIntMaxType(), Builder); 772 DefineFmt("__INTMAX", TI.getIntMaxType(), TI, Builder); 773 Builder.defineMacro("__INTMAX_C_SUFFIX__", 774 TI.getTypeConstantSuffix(TI.getIntMaxType())); 775 DefineType("__UINTMAX_TYPE__", TI.getUIntMaxType(), Builder); 776 DefineFmt("__UINTMAX", TI.getUIntMaxType(), TI, Builder); 777 Builder.defineMacro("__UINTMAX_C_SUFFIX__", 778 TI.getTypeConstantSuffix(TI.getUIntMaxType())); 779 DefineTypeWidth("__INTMAX_WIDTH__", TI.getIntMaxType(), TI, Builder); 780 DefineType("__PTRDIFF_TYPE__", TI.getPtrDiffType(0), Builder); 781 DefineFmt("__PTRDIFF", TI.getPtrDiffType(0), TI, Builder); 782 DefineTypeWidth("__PTRDIFF_WIDTH__", TI.getPtrDiffType(0), TI, Builder); 783 DefineType("__INTPTR_TYPE__", TI.getIntPtrType(), Builder); 784 DefineFmt("__INTPTR", TI.getIntPtrType(), TI, Builder); 785 DefineTypeWidth("__INTPTR_WIDTH__", TI.getIntPtrType(), TI, Builder); 786 DefineType("__SIZE_TYPE__", TI.getSizeType(), Builder); 787 DefineFmt("__SIZE", TI.getSizeType(), TI, Builder); 788 DefineTypeWidth("__SIZE_WIDTH__", TI.getSizeType(), TI, Builder); 789 DefineType("__WCHAR_TYPE__", TI.getWCharType(), Builder); 790 DefineTypeWidth("__WCHAR_WIDTH__", TI.getWCharType(), TI, Builder); 791 DefineType("__WINT_TYPE__", TI.getWIntType(), Builder); 792 DefineTypeWidth("__WINT_WIDTH__", TI.getWIntType(), TI, Builder); 793 DefineTypeWidth("__SIG_ATOMIC_WIDTH__", TI.getSigAtomicType(), TI, Builder); 794 DefineTypeSize("__SIG_ATOMIC_MAX__", TI.getSigAtomicType(), TI, Builder); 795 DefineType("__CHAR16_TYPE__", TI.getChar16Type(), Builder); 796 DefineType("__CHAR32_TYPE__", TI.getChar32Type(), Builder); 797 798 DefineTypeWidth("__UINTMAX_WIDTH__", TI.getUIntMaxType(), TI, Builder); 799 DefineType("__UINTPTR_TYPE__", TI.getUIntPtrType(), Builder); 800 DefineFmt("__UINTPTR", TI.getUIntPtrType(), TI, Builder); 801 DefineTypeWidth("__UINTPTR_WIDTH__", TI.getUIntPtrType(), TI, Builder); 802 803 DefineFloatMacros(Builder, "FLT", &TI.getFloatFormat(), "F"); 804 DefineFloatMacros(Builder, "DBL", &TI.getDoubleFormat(), ""); 805 DefineFloatMacros(Builder, "LDBL", &TI.getLongDoubleFormat(), "L"); 806 807 // Define a __POINTER_WIDTH__ macro for stdint.h. 808 Builder.defineMacro("__POINTER_WIDTH__", 809 Twine((int)TI.getPointerWidth(0))); 810 811 // Define __BIGGEST_ALIGNMENT__ to be compatible with gcc. 812 Builder.defineMacro("__BIGGEST_ALIGNMENT__", 813 Twine(TI.getSuitableAlign() / TI.getCharWidth()) ); 814 815 if (!LangOpts.CharIsSigned) 816 Builder.defineMacro("__CHAR_UNSIGNED__"); 817 818 if (!TargetInfo::isTypeSigned(TI.getWCharType())) 819 Builder.defineMacro("__WCHAR_UNSIGNED__"); 820 821 if (!TargetInfo::isTypeSigned(TI.getWIntType())) 822 Builder.defineMacro("__WINT_UNSIGNED__"); 823 824 // Define exact-width integer types for stdint.h 825 DefineExactWidthIntType(TargetInfo::SignedChar, TI, Builder); 826 827 if (TI.getShortWidth() > TI.getCharWidth()) 828 DefineExactWidthIntType(TargetInfo::SignedShort, TI, Builder); 829 830 if (TI.getIntWidth() > TI.getShortWidth()) 831 DefineExactWidthIntType(TargetInfo::SignedInt, TI, Builder); 832 833 if (TI.getLongWidth() > TI.getIntWidth()) 834 DefineExactWidthIntType(TargetInfo::SignedLong, TI, Builder); 835 836 if (TI.getLongLongWidth() > TI.getLongWidth()) 837 DefineExactWidthIntType(TargetInfo::SignedLongLong, TI, Builder); 838 839 DefineExactWidthIntType(TargetInfo::UnsignedChar, TI, Builder); 840 DefineExactWidthIntTypeSize(TargetInfo::UnsignedChar, TI, Builder); 841 DefineExactWidthIntTypeSize(TargetInfo::SignedChar, TI, Builder); 842 843 if (TI.getShortWidth() > TI.getCharWidth()) { 844 DefineExactWidthIntType(TargetInfo::UnsignedShort, TI, Builder); 845 DefineExactWidthIntTypeSize(TargetInfo::UnsignedShort, TI, Builder); 846 DefineExactWidthIntTypeSize(TargetInfo::SignedShort, TI, Builder); 847 } 848 849 if (TI.getIntWidth() > TI.getShortWidth()) { 850 DefineExactWidthIntType(TargetInfo::UnsignedInt, TI, Builder); 851 DefineExactWidthIntTypeSize(TargetInfo::UnsignedInt, TI, Builder); 852 DefineExactWidthIntTypeSize(TargetInfo::SignedInt, TI, Builder); 853 } 854 855 if (TI.getLongWidth() > TI.getIntWidth()) { 856 DefineExactWidthIntType(TargetInfo::UnsignedLong, TI, Builder); 857 DefineExactWidthIntTypeSize(TargetInfo::UnsignedLong, TI, Builder); 858 DefineExactWidthIntTypeSize(TargetInfo::SignedLong, TI, Builder); 859 } 860 861 if (TI.getLongLongWidth() > TI.getLongWidth()) { 862 DefineExactWidthIntType(TargetInfo::UnsignedLongLong, TI, Builder); 863 DefineExactWidthIntTypeSize(TargetInfo::UnsignedLongLong, TI, Builder); 864 DefineExactWidthIntTypeSize(TargetInfo::SignedLongLong, TI, Builder); 865 } 866 867 DefineLeastWidthIntType(8, true, TI, Builder); 868 DefineLeastWidthIntType(8, false, TI, Builder); 869 DefineLeastWidthIntType(16, true, TI, Builder); 870 DefineLeastWidthIntType(16, false, TI, Builder); 871 DefineLeastWidthIntType(32, true, TI, Builder); 872 DefineLeastWidthIntType(32, false, TI, Builder); 873 DefineLeastWidthIntType(64, true, TI, Builder); 874 DefineLeastWidthIntType(64, false, TI, Builder); 875 876 DefineFastIntType(8, true, TI, Builder); 877 DefineFastIntType(8, false, TI, Builder); 878 DefineFastIntType(16, true, TI, Builder); 879 DefineFastIntType(16, false, TI, Builder); 880 DefineFastIntType(32, true, TI, Builder); 881 DefineFastIntType(32, false, TI, Builder); 882 DefineFastIntType(64, true, TI, Builder); 883 DefineFastIntType(64, false, TI, Builder); 884 885 char UserLabelPrefix[2] = {TI.getDataLayout().getGlobalPrefix(), 0}; 886 Builder.defineMacro("__USER_LABEL_PREFIX__", UserLabelPrefix); 887 888 if (LangOpts.FastMath || LangOpts.FiniteMathOnly) 889 Builder.defineMacro("__FINITE_MATH_ONLY__", "1"); 890 else 891 Builder.defineMacro("__FINITE_MATH_ONLY__", "0"); 892 893 if (!LangOpts.MSVCCompat) { 894 if (LangOpts.GNUInline || LangOpts.CPlusPlus) 895 Builder.defineMacro("__GNUC_GNU_INLINE__"); 896 else 897 Builder.defineMacro("__GNUC_STDC_INLINE__"); 898 899 // The value written by __atomic_test_and_set. 900 // FIXME: This is target-dependent. 901 Builder.defineMacro("__GCC_ATOMIC_TEST_AND_SET_TRUEVAL", "1"); 902 } 903 904 auto addLockFreeMacros = [&](const llvm::Twine &Prefix) { 905 // Used by libc++ and libstdc++ to implement ATOMIC_<foo>_LOCK_FREE. 906 unsigned InlineWidthBits = TI.getMaxAtomicInlineWidth(); 907 #define DEFINE_LOCK_FREE_MACRO(TYPE, Type) \ 908 Builder.defineMacro(Prefix + #TYPE "_LOCK_FREE", \ 909 getLockFreeValue(TI.get##Type##Width(), \ 910 TI.get##Type##Align(), \ 911 InlineWidthBits)); 912 DEFINE_LOCK_FREE_MACRO(BOOL, Bool); 913 DEFINE_LOCK_FREE_MACRO(CHAR, Char); 914 DEFINE_LOCK_FREE_MACRO(CHAR16_T, Char16); 915 DEFINE_LOCK_FREE_MACRO(CHAR32_T, Char32); 916 DEFINE_LOCK_FREE_MACRO(WCHAR_T, WChar); 917 DEFINE_LOCK_FREE_MACRO(SHORT, Short); 918 DEFINE_LOCK_FREE_MACRO(INT, Int); 919 DEFINE_LOCK_FREE_MACRO(LONG, Long); 920 DEFINE_LOCK_FREE_MACRO(LLONG, LongLong); 921 Builder.defineMacro(Prefix + "POINTER_LOCK_FREE", 922 getLockFreeValue(TI.getPointerWidth(0), 923 TI.getPointerAlign(0), 924 InlineWidthBits)); 925 #undef DEFINE_LOCK_FREE_MACRO 926 }; 927 addLockFreeMacros("__CLANG_ATOMIC_"); 928 if (!LangOpts.MSVCCompat) 929 addLockFreeMacros("__GCC_ATOMIC_"); 930 931 if (LangOpts.NoInlineDefine) 932 Builder.defineMacro("__NO_INLINE__"); 933 934 if (unsigned PICLevel = LangOpts.PICLevel) { 935 Builder.defineMacro("__PIC__", Twine(PICLevel)); 936 Builder.defineMacro("__pic__", Twine(PICLevel)); 937 if (LangOpts.PIE) { 938 Builder.defineMacro("__PIE__", Twine(PICLevel)); 939 Builder.defineMacro("__pie__", Twine(PICLevel)); 940 } 941 } 942 943 // Macros to control C99 numerics and <float.h> 944 Builder.defineMacro("__FLT_EVAL_METHOD__", Twine(TI.getFloatEvalMethod())); 945 Builder.defineMacro("__FLT_RADIX__", "2"); 946 Builder.defineMacro("__DECIMAL_DIG__", "__LDBL_DECIMAL_DIG__"); 947 948 if (LangOpts.getStackProtector() == LangOptions::SSPOn) 949 Builder.defineMacro("__SSP__"); 950 else if (LangOpts.getStackProtector() == LangOptions::SSPStrong) 951 Builder.defineMacro("__SSP_STRONG__", "2"); 952 else if (LangOpts.getStackProtector() == LangOptions::SSPReq) 953 Builder.defineMacro("__SSP_ALL__", "3"); 954 955 // Define a macro that exists only when using the static analyzer. 956 if (FEOpts.ProgramAction == frontend::RunAnalysis) 957 Builder.defineMacro("__clang_analyzer__"); 958 959 if (LangOpts.FastRelaxedMath) 960 Builder.defineMacro("__FAST_RELAXED_MATH__"); 961 962 if (FEOpts.ProgramAction == frontend::RewriteObjC || 963 LangOpts.getGC() != LangOptions::NonGC) { 964 Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))"); 965 Builder.defineMacro("__strong", "__attribute__((objc_gc(strong)))"); 966 Builder.defineMacro("__autoreleasing", ""); 967 Builder.defineMacro("__unsafe_unretained", ""); 968 } else if (LangOpts.ObjC1) { 969 Builder.defineMacro("__weak", "__attribute__((objc_ownership(weak)))"); 970 Builder.defineMacro("__strong", "__attribute__((objc_ownership(strong)))"); 971 Builder.defineMacro("__autoreleasing", 972 "__attribute__((objc_ownership(autoreleasing)))"); 973 Builder.defineMacro("__unsafe_unretained", 974 "__attribute__((objc_ownership(none)))"); 975 } 976 977 // On Darwin, there are __double_underscored variants of the type 978 // nullability qualifiers. 979 if (TI.getTriple().isOSDarwin()) { 980 Builder.defineMacro("__nonnull", "_Nonnull"); 981 Builder.defineMacro("__null_unspecified", "_Null_unspecified"); 982 Builder.defineMacro("__nullable", "_Nullable"); 983 } 984 985 // OpenMP definition 986 // OpenMP 2.2: 987 // In implementations that support a preprocessor, the _OPENMP 988 // macro name is defined to have the decimal value yyyymm where 989 // yyyy and mm are the year and the month designations of the 990 // version of the OpenMP API that the implementation support. 991 switch (LangOpts.OpenMP) { 992 case 0: 993 break; 994 case 40: 995 Builder.defineMacro("_OPENMP", "201307"); 996 break; 997 case 45: 998 Builder.defineMacro("_OPENMP", "201511"); 999 break; 1000 default: 1001 // Default version is OpenMP 3.1 1002 Builder.defineMacro("_OPENMP", "201107"); 1003 break; 1004 } 1005 1006 // CUDA device path compilaton 1007 if (LangOpts.CUDAIsDevice) { 1008 // The CUDA_ARCH value is set for the GPU target specified in the NVPTX 1009 // backend's target defines. 1010 Builder.defineMacro("__CUDA_ARCH__"); 1011 } 1012 1013 // We need to communicate this to our CUDA header wrapper, which in turn 1014 // informs the proper CUDA headers of this choice. 1015 if (LangOpts.CUDADeviceApproxTranscendentals || LangOpts.FastMath) { 1016 Builder.defineMacro("__CLANG_CUDA_APPROX_TRANSCENDENTALS__"); 1017 } 1018 1019 // OpenCL definitions. 1020 if (LangOpts.OpenCL) { 1021 #define OPENCLEXT(Ext) \ 1022 if (TI.getSupportedOpenCLOpts().isSupported(#Ext, \ 1023 LangOpts.OpenCLVersion)) \ 1024 Builder.defineMacro(#Ext); 1025 #include "clang/Basic/OpenCLExtensions.def" 1026 } 1027 1028 if (TI.hasInt128Type() && LangOpts.CPlusPlus && LangOpts.GNUMode) { 1029 // For each extended integer type, g++ defines a macro mapping the 1030 // index of the type (0 in this case) in some list of extended types 1031 // to the type. 1032 Builder.defineMacro("__GLIBCXX_TYPE_INT_N_0", "__int128"); 1033 Builder.defineMacro("__GLIBCXX_BITSIZE_INT_N_0", "128"); 1034 } 1035 1036 // Get other target #defines. 1037 TI.getTargetDefines(LangOpts, Builder); 1038 } 1039 1040 /// InitializePreprocessor - Initialize the preprocessor getting it and the 1041 /// environment ready to process a single file. This returns true on error. 1042 /// 1043 void clang::InitializePreprocessor( 1044 Preprocessor &PP, const PreprocessorOptions &InitOpts, 1045 const PCHContainerReader &PCHContainerRdr, 1046 const FrontendOptions &FEOpts) { 1047 const LangOptions &LangOpts = PP.getLangOpts(); 1048 std::string PredefineBuffer; 1049 PredefineBuffer.reserve(4080); 1050 llvm::raw_string_ostream Predefines(PredefineBuffer); 1051 MacroBuilder Builder(Predefines); 1052 1053 // Emit line markers for various builtin sections of the file. We don't do 1054 // this in asm preprocessor mode, because "# 4" is not a line marker directive 1055 // in this mode. 1056 if (!PP.getLangOpts().AsmPreprocessor) 1057 Builder.append("# 1 \"<built-in>\" 3"); 1058 1059 // Install things like __POWERPC__, __GNUC__, etc into the macro table. 1060 if (InitOpts.UsePredefines) { 1061 // FIXME: This will create multiple definitions for most of the predefined 1062 // macros. This is not the right way to handle this. 1063 if ((LangOpts.CUDA || LangOpts.OpenMPIsDevice) && PP.getAuxTargetInfo()) 1064 InitializePredefinedMacros(*PP.getAuxTargetInfo(), LangOpts, FEOpts, 1065 Builder); 1066 1067 InitializePredefinedMacros(PP.getTargetInfo(), LangOpts, FEOpts, Builder); 1068 1069 // Install definitions to make Objective-C++ ARC work well with various 1070 // C++ Standard Library implementations. 1071 if (LangOpts.ObjC1 && LangOpts.CPlusPlus && 1072 (LangOpts.ObjCAutoRefCount || LangOpts.ObjCWeak)) { 1073 switch (InitOpts.ObjCXXARCStandardLibrary) { 1074 case ARCXX_nolib: 1075 case ARCXX_libcxx: 1076 break; 1077 1078 case ARCXX_libstdcxx: 1079 AddObjCXXARCLibstdcxxDefines(LangOpts, Builder); 1080 break; 1081 } 1082 } 1083 } 1084 1085 // Even with predefines off, some macros are still predefined. 1086 // These should all be defined in the preprocessor according to the 1087 // current language configuration. 1088 InitializeStandardPredefinedMacros(PP.getTargetInfo(), PP.getLangOpts(), 1089 FEOpts, Builder); 1090 1091 // Add on the predefines from the driver. Wrap in a #line directive to report 1092 // that they come from the command line. 1093 if (!PP.getLangOpts().AsmPreprocessor) 1094 Builder.append("# 1 \"<command line>\" 1"); 1095 1096 // Process #define's and #undef's in the order they are given. 1097 for (unsigned i = 0, e = InitOpts.Macros.size(); i != e; ++i) { 1098 if (InitOpts.Macros[i].second) // isUndef 1099 Builder.undefineMacro(InitOpts.Macros[i].first); 1100 else 1101 DefineBuiltinMacro(Builder, InitOpts.Macros[i].first, 1102 PP.getDiagnostics()); 1103 } 1104 1105 // Exit the command line and go back to <built-in> (2 is LC_LEAVE). 1106 if (!PP.getLangOpts().AsmPreprocessor) 1107 Builder.append("# 1 \"<built-in>\" 2"); 1108 1109 // If -imacros are specified, include them now. These are processed before 1110 // any -include directives. 1111 for (unsigned i = 0, e = InitOpts.MacroIncludes.size(); i != e; ++i) 1112 AddImplicitIncludeMacros(Builder, InitOpts.MacroIncludes[i]); 1113 1114 // Process -include-pch/-include-pth directives. 1115 if (!InitOpts.ImplicitPCHInclude.empty()) 1116 AddImplicitIncludePCH(Builder, PP, PCHContainerRdr, 1117 InitOpts.ImplicitPCHInclude); 1118 if (!InitOpts.ImplicitPTHInclude.empty()) 1119 AddImplicitIncludePTH(Builder, PP, InitOpts.ImplicitPTHInclude); 1120 1121 // Process -include directives. 1122 for (unsigned i = 0, e = InitOpts.Includes.size(); i != e; ++i) { 1123 const std::string &Path = InitOpts.Includes[i]; 1124 AddImplicitInclude(Builder, Path); 1125 } 1126 1127 // Instruct the preprocessor to skip the preamble. 1128 PP.setSkipMainFilePreamble(InitOpts.PrecompiledPreambleBytes.first, 1129 InitOpts.PrecompiledPreambleBytes.second); 1130 1131 // Copy PredefinedBuffer into the Preprocessor. 1132 PP.setPredefines(Predefines.str()); 1133 } 1134