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/TargetInfo.h" 18 #include "clang/Basic/Version.h" 19 #include "clang/Frontend/FrontendDiagnostic.h" 20 #include "clang/Frontend/FrontendOptions.h" 21 #include "clang/Frontend/Utils.h" 22 #include "clang/Lex/HeaderSearch.h" 23 #include "clang/Lex/PTHManager.h" 24 #include "clang/Lex/Preprocessor.h" 25 #include "clang/Lex/PreprocessorOptions.h" 26 #include "clang/Serialization/ASTReader.h" 27 #include "llvm/ADT/APFloat.h" 28 using namespace clang; 29 30 static bool MacroBodyEndsInBackslash(StringRef MacroBody) { 31 while (!MacroBody.empty() && isWhitespace(MacroBody.back())) 32 MacroBody = MacroBody.drop_back(); 33 return !MacroBody.empty() && MacroBody.back() == '\\'; 34 } 35 36 // Append a #define line to Buf for Macro. Macro should be of the form XXX, 37 // in which case we emit "#define XXX 1" or "XXX=Y z W" in which case we emit 38 // "#define XXX Y z W". To get a #define with no value, use "XXX=". 39 static void DefineBuiltinMacro(MacroBuilder &Builder, StringRef Macro, 40 DiagnosticsEngine &Diags) { 41 std::pair<StringRef, StringRef> MacroPair = Macro.split('='); 42 StringRef MacroName = MacroPair.first; 43 StringRef MacroBody = MacroPair.second; 44 if (MacroName.size() != Macro.size()) { 45 // Per GCC -D semantics, the macro ends at \n if it exists. 46 StringRef::size_type End = MacroBody.find_first_of("\n\r"); 47 if (End != StringRef::npos) 48 Diags.Report(diag::warn_fe_macro_contains_embedded_newline) 49 << MacroName; 50 MacroBody = MacroBody.substr(0, End); 51 // We handle macro bodies which end in a backslash by appending an extra 52 // backslash+newline. This makes sure we don't accidentally treat the 53 // backslash as a line continuation marker. 54 if (MacroBodyEndsInBackslash(MacroBody)) 55 Builder.defineMacro(MacroName, Twine(MacroBody) + "\\\n"); 56 else 57 Builder.defineMacro(MacroName, MacroBody); 58 } else { 59 // Push "macroname 1". 60 Builder.defineMacro(Macro); 61 } 62 } 63 64 /// AddImplicitInclude - Add an implicit \#include of the specified file to the 65 /// predefines buffer. 66 /// As these includes are generated by -include arguments the header search 67 /// logic is going to search relatively to the current working directory. 68 static void AddImplicitInclude(MacroBuilder &Builder, StringRef File) { 69 Builder.append(Twine("#include \"") + File + "\""); 70 } 71 72 static void AddImplicitIncludeMacros(MacroBuilder &Builder, StringRef File) { 73 Builder.append(Twine("#__include_macros \"") + File + "\""); 74 // Marker token to stop the __include_macros fetch loop. 75 Builder.append("##"); // ##? 76 } 77 78 /// AddImplicitIncludePTH - Add an implicit \#include using the original file 79 /// used to generate a PTH cache. 80 static void AddImplicitIncludePTH(MacroBuilder &Builder, Preprocessor &PP, 81 StringRef ImplicitIncludePTH) { 82 PTHManager *P = PP.getPTHManager(); 83 // Null check 'P' in the corner case where it couldn't be created. 84 const char *OriginalFile = P ? P->getOriginalSourceFile() : nullptr; 85 86 if (!OriginalFile) { 87 PP.getDiagnostics().Report(diag::err_fe_pth_file_has_no_source_header) 88 << ImplicitIncludePTH; 89 return; 90 } 91 92 AddImplicitInclude(Builder, OriginalFile); 93 } 94 95 /// \brief Add an implicit \#include using the original file used to generate 96 /// a PCH file. 97 static void AddImplicitIncludePCH(MacroBuilder &Builder, Preprocessor &PP, 98 const PCHContainerReader &PCHContainerRdr, 99 StringRef ImplicitIncludePCH) { 100 std::string OriginalFile = 101 ASTReader::getOriginalSourceFile(ImplicitIncludePCH, PP.getFileManager(), 102 PCHContainerRdr, PP.getDiagnostics()); 103 if (OriginalFile.empty()) 104 return; 105 106 AddImplicitInclude(Builder, OriginalFile); 107 } 108 109 /// PickFP - This is used to pick a value based on the FP semantics of the 110 /// specified FP model. 111 template <typename T> 112 static T PickFP(const llvm::fltSemantics *Sem, T IEEESingleVal, 113 T IEEEDoubleVal, T X87DoubleExtendedVal, T PPCDoubleDoubleVal, 114 T IEEEQuadVal) { 115 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEsingle()) 116 return IEEESingleVal; 117 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEdouble()) 118 return IEEEDoubleVal; 119 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::x87DoubleExtended()) 120 return X87DoubleExtendedVal; 121 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::PPCDoubleDouble()) 122 return PPCDoubleDoubleVal; 123 assert(Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEquad()); 124 return IEEEQuadVal; 125 } 126 127 static void DefineFloatMacros(MacroBuilder &Builder, StringRef Prefix, 128 const llvm::fltSemantics *Sem, StringRef Ext) { 129 const char *DenormMin, *Epsilon, *Max, *Min; 130 DenormMin = PickFP(Sem, "1.40129846e-45", "4.9406564584124654e-324", 131 "3.64519953188247460253e-4951", 132 "4.94065645841246544176568792868221e-324", 133 "6.47517511943802511092443895822764655e-4966"); 134 int Digits = PickFP(Sem, 6, 15, 18, 31, 33); 135 int DecimalDigits = PickFP(Sem, 9, 17, 21, 33, 36); 136 Epsilon = PickFP(Sem, "1.19209290e-7", "2.2204460492503131e-16", 137 "1.08420217248550443401e-19", 138 "4.94065645841246544176568792868221e-324", 139 "1.92592994438723585305597794258492732e-34"); 140 int MantissaDigits = PickFP(Sem, 24, 53, 64, 106, 113); 141 int Min10Exp = PickFP(Sem, -37, -307, -4931, -291, -4931); 142 int Max10Exp = PickFP(Sem, 38, 308, 4932, 308, 4932); 143 int MinExp = PickFP(Sem, -125, -1021, -16381, -968, -16381); 144 int MaxExp = PickFP(Sem, 128, 1024, 16384, 1024, 16384); 145 Min = PickFP(Sem, "1.17549435e-38", "2.2250738585072014e-308", 146 "3.36210314311209350626e-4932", 147 "2.00416836000897277799610805135016e-292", 148 "3.36210314311209350626267781732175260e-4932"); 149 Max = PickFP(Sem, "3.40282347e+38", "1.7976931348623157e+308", 150 "1.18973149535723176502e+4932", 151 "1.79769313486231580793728971405301e+308", 152 "1.18973149535723176508575932662800702e+4932"); 153 154 SmallString<32> DefPrefix; 155 DefPrefix = "__"; 156 DefPrefix += Prefix; 157 DefPrefix += "_"; 158 159 Builder.defineMacro(DefPrefix + "DENORM_MIN__", Twine(DenormMin)+Ext); 160 Builder.defineMacro(DefPrefix + "HAS_DENORM__"); 161 Builder.defineMacro(DefPrefix + "DIG__", Twine(Digits)); 162 Builder.defineMacro(DefPrefix + "DECIMAL_DIG__", Twine(DecimalDigits)); 163 Builder.defineMacro(DefPrefix + "EPSILON__", Twine(Epsilon)+Ext); 164 Builder.defineMacro(DefPrefix + "HAS_INFINITY__"); 165 Builder.defineMacro(DefPrefix + "HAS_QUIET_NAN__"); 166 Builder.defineMacro(DefPrefix + "MANT_DIG__", Twine(MantissaDigits)); 167 168 Builder.defineMacro(DefPrefix + "MAX_10_EXP__", Twine(Max10Exp)); 169 Builder.defineMacro(DefPrefix + "MAX_EXP__", Twine(MaxExp)); 170 Builder.defineMacro(DefPrefix + "MAX__", Twine(Max)+Ext); 171 172 Builder.defineMacro(DefPrefix + "MIN_10_EXP__","("+Twine(Min10Exp)+")"); 173 Builder.defineMacro(DefPrefix + "MIN_EXP__", "("+Twine(MinExp)+")"); 174 Builder.defineMacro(DefPrefix + "MIN__", Twine(Min)+Ext); 175 } 176 177 178 /// DefineTypeSize - Emit a macro to the predefines buffer that declares a macro 179 /// named MacroName with the max value for a type with width 'TypeWidth' a 180 /// signedness of 'isSigned' and with a value suffix of 'ValSuffix' (e.g. LL). 181 static void DefineTypeSize(const Twine &MacroName, unsigned TypeWidth, 182 StringRef ValSuffix, bool isSigned, 183 MacroBuilder &Builder) { 184 llvm::APInt MaxVal = isSigned ? llvm::APInt::getSignedMaxValue(TypeWidth) 185 : llvm::APInt::getMaxValue(TypeWidth); 186 Builder.defineMacro(MacroName, MaxVal.toString(10, isSigned) + ValSuffix); 187 } 188 189 /// DefineTypeSize - An overloaded helper that uses TargetInfo to determine 190 /// the width, suffix, and signedness of the given type 191 static void DefineTypeSize(const Twine &MacroName, TargetInfo::IntType Ty, 192 const TargetInfo &TI, MacroBuilder &Builder) { 193 DefineTypeSize(MacroName, TI.getTypeWidth(Ty), TI.getTypeConstantSuffix(Ty), 194 TI.isTypeSigned(Ty), Builder); 195 } 196 197 static void DefineFmt(const Twine &Prefix, TargetInfo::IntType Ty, 198 const TargetInfo &TI, MacroBuilder &Builder) { 199 bool IsSigned = TI.isTypeSigned(Ty); 200 StringRef FmtModifier = TI.getTypeFormatModifier(Ty); 201 for (const char *Fmt = IsSigned ? "di" : "ouxX"; *Fmt; ++Fmt) { 202 Builder.defineMacro(Prefix + "_FMT" + Twine(*Fmt) + "__", 203 Twine("\"") + FmtModifier + Twine(*Fmt) + "\""); 204 } 205 } 206 207 static void DefineType(const Twine &MacroName, TargetInfo::IntType Ty, 208 MacroBuilder &Builder) { 209 Builder.defineMacro(MacroName, TargetInfo::getTypeName(Ty)); 210 } 211 212 static void DefineTypeWidth(StringRef MacroName, TargetInfo::IntType Ty, 213 const TargetInfo &TI, MacroBuilder &Builder) { 214 Builder.defineMacro(MacroName, Twine(TI.getTypeWidth(Ty))); 215 } 216 217 static void DefineTypeSizeof(StringRef MacroName, unsigned BitWidth, 218 const TargetInfo &TI, MacroBuilder &Builder) { 219 Builder.defineMacro(MacroName, 220 Twine(BitWidth / TI.getCharWidth())); 221 } 222 223 static void DefineExactWidthIntType(TargetInfo::IntType Ty, 224 const TargetInfo &TI, 225 MacroBuilder &Builder) { 226 int TypeWidth = TI.getTypeWidth(Ty); 227 bool IsSigned = TI.isTypeSigned(Ty); 228 229 // Use the target specified int64 type, when appropriate, so that [u]int64_t 230 // ends up being defined in terms of the correct type. 231 if (TypeWidth == 64) 232 Ty = IsSigned ? TI.getInt64Type() : TI.getUInt64Type(); 233 234 const char *Prefix = IsSigned ? "__INT" : "__UINT"; 235 236 DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder); 237 DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder); 238 239 StringRef ConstSuffix(TI.getTypeConstantSuffix(Ty)); 240 Builder.defineMacro(Prefix + Twine(TypeWidth) + "_C_SUFFIX__", ConstSuffix); 241 } 242 243 static void DefineExactWidthIntTypeSize(TargetInfo::IntType Ty, 244 const TargetInfo &TI, 245 MacroBuilder &Builder) { 246 int TypeWidth = TI.getTypeWidth(Ty); 247 bool IsSigned = TI.isTypeSigned(Ty); 248 249 // Use the target specified int64 type, when appropriate, so that [u]int64_t 250 // ends up being defined in terms of the correct type. 251 if (TypeWidth == 64) 252 Ty = IsSigned ? TI.getInt64Type() : TI.getUInt64Type(); 253 254 const char *Prefix = IsSigned ? "__INT" : "__UINT"; 255 DefineTypeSize(Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder); 256 } 257 258 static void DefineLeastWidthIntType(unsigned TypeWidth, bool IsSigned, 259 const TargetInfo &TI, 260 MacroBuilder &Builder) { 261 TargetInfo::IntType Ty = TI.getLeastIntTypeByWidth(TypeWidth, IsSigned); 262 if (Ty == TargetInfo::NoInt) 263 return; 264 265 const char *Prefix = IsSigned ? "__INT_LEAST" : "__UINT_LEAST"; 266 DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder); 267 DefineTypeSize(Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder); 268 DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder); 269 } 270 271 static void DefineFastIntType(unsigned TypeWidth, bool IsSigned, 272 const TargetInfo &TI, MacroBuilder &Builder) { 273 // stdint.h currently defines the fast int types as equivalent to the least 274 // types. 275 TargetInfo::IntType Ty = TI.getLeastIntTypeByWidth(TypeWidth, IsSigned); 276 if (Ty == TargetInfo::NoInt) 277 return; 278 279 const char *Prefix = IsSigned ? "__INT_FAST" : "__UINT_FAST"; 280 DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder); 281 DefineTypeSize(Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder); 282 283 DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder); 284 } 285 286 287 /// Get the value the ATOMIC_*_LOCK_FREE macro should have for a type with 288 /// the specified properties. 289 static const char *getLockFreeValue(unsigned TypeWidth, unsigned TypeAlign, 290 unsigned InlineWidth) { 291 // Fully-aligned, power-of-2 sizes no larger than the inline 292 // width will be inlined as lock-free operations. 293 if (TypeWidth == TypeAlign && (TypeWidth & (TypeWidth - 1)) == 0 && 294 TypeWidth <= InlineWidth) 295 return "2"; // "always lock free" 296 // We cannot be certain what operations the lib calls might be 297 // able to implement as lock-free on future processors. 298 return "1"; // "sometimes lock free" 299 } 300 301 /// \brief Add definitions required for a smooth interaction between 302 /// Objective-C++ automated reference counting and libstdc++ (4.2). 303 static void AddObjCXXARCLibstdcxxDefines(const LangOptions &LangOpts, 304 MacroBuilder &Builder) { 305 Builder.defineMacro("_GLIBCXX_PREDEFINED_OBJC_ARC_IS_SCALAR"); 306 307 std::string Result; 308 { 309 // Provide specializations for the __is_scalar type trait so that 310 // lifetime-qualified objects are not considered "scalar" types, which 311 // libstdc++ uses as an indicator of the presence of trivial copy, assign, 312 // default-construct, and destruct semantics (none of which hold for 313 // lifetime-qualified objects in ARC). 314 llvm::raw_string_ostream Out(Result); 315 316 Out << "namespace std {\n" 317 << "\n" 318 << "struct __true_type;\n" 319 << "struct __false_type;\n" 320 << "\n"; 321 322 Out << "template<typename _Tp> struct __is_scalar;\n" 323 << "\n"; 324 325 if (LangOpts.ObjCAutoRefCount) { 326 Out << "template<typename _Tp>\n" 327 << "struct __is_scalar<__attribute__((objc_ownership(strong))) _Tp> {\n" 328 << " enum { __value = 0 };\n" 329 << " typedef __false_type __type;\n" 330 << "};\n" 331 << "\n"; 332 } 333 334 if (LangOpts.ObjCWeak) { 335 Out << "template<typename _Tp>\n" 336 << "struct __is_scalar<__attribute__((objc_ownership(weak))) _Tp> {\n" 337 << " enum { __value = 0 };\n" 338 << " typedef __false_type __type;\n" 339 << "};\n" 340 << "\n"; 341 } 342 343 if (LangOpts.ObjCAutoRefCount) { 344 Out << "template<typename _Tp>\n" 345 << "struct __is_scalar<__attribute__((objc_ownership(autoreleasing)))" 346 << " _Tp> {\n" 347 << " enum { __value = 0 };\n" 348 << " typedef __false_type __type;\n" 349 << "};\n" 350 << "\n"; 351 } 352 353 Out << "}\n"; 354 } 355 Builder.append(Result); 356 } 357 358 static void InitializeStandardPredefinedMacros(const TargetInfo &TI, 359 const LangOptions &LangOpts, 360 const FrontendOptions &FEOpts, 361 MacroBuilder &Builder) { 362 if (!LangOpts.MSVCCompat && !LangOpts.TraditionalCPP) 363 Builder.defineMacro("__STDC__"); 364 if (LangOpts.Freestanding) 365 Builder.defineMacro("__STDC_HOSTED__", "0"); 366 else 367 Builder.defineMacro("__STDC_HOSTED__"); 368 369 if (!LangOpts.CPlusPlus) { 370 if (LangOpts.C11) 371 Builder.defineMacro("__STDC_VERSION__", "201112L"); 372 else if (LangOpts.C99) 373 Builder.defineMacro("__STDC_VERSION__", "199901L"); 374 else if (!LangOpts.GNUMode && LangOpts.Digraphs) 375 Builder.defineMacro("__STDC_VERSION__", "199409L"); 376 } else { 377 // C++17 [cpp.predefined]p1: 378 // The name __cplusplus is defined to the value 201703L when compiling a 379 // C++ translation unit. 380 if (LangOpts.CPlusPlus1z) 381 Builder.defineMacro("__cplusplus", "201703L"); 382 // C++1y [cpp.predefined]p1: 383 // The name __cplusplus is defined to the value 201402L when compiling a 384 // C++ translation unit. 385 else if (LangOpts.CPlusPlus14) 386 Builder.defineMacro("__cplusplus", "201402L"); 387 // C++11 [cpp.predefined]p1: 388 // The name __cplusplus is defined to the value 201103L when compiling a 389 // C++ translation unit. 390 else if (LangOpts.CPlusPlus11) 391 Builder.defineMacro("__cplusplus", "201103L"); 392 // C++03 [cpp.predefined]p1: 393 // The name __cplusplus is defined to the value 199711L when compiling a 394 // C++ translation unit. 395 else 396 Builder.defineMacro("__cplusplus", "199711L"); 397 398 // C++1z [cpp.predefined]p1: 399 // An integer literal of type std::size_t whose value is the alignment 400 // guaranteed by a call to operator new(std::size_t) 401 // 402 // We provide this in all language modes, since it seems generally useful. 403 Builder.defineMacro("__STDCPP_DEFAULT_NEW_ALIGNMENT__", 404 Twine(TI.getNewAlign() / TI.getCharWidth()) + 405 TI.getTypeConstantSuffix(TI.getSizeType())); 406 } 407 408 // In C11 these are environment macros. In C++11 they are only defined 409 // as part of <cuchar>. To prevent breakage when mixing C and C++ 410 // code, define these macros unconditionally. We can define them 411 // unconditionally, as Clang always uses UTF-16 and UTF-32 for 16-bit 412 // and 32-bit character literals. 413 Builder.defineMacro("__STDC_UTF_16__", "1"); 414 Builder.defineMacro("__STDC_UTF_32__", "1"); 415 416 if (LangOpts.ObjC1) 417 Builder.defineMacro("__OBJC__"); 418 419 // OpenCL v1.0/1.1 s6.9, v1.2/2.0 s6.10: Preprocessor Directives and Macros. 420 if (LangOpts.OpenCL) { 421 // OpenCL v1.0 and v1.1 do not have a predefined macro to indicate the 422 // language standard with which the program is compiled. __OPENCL_VERSION__ 423 // is for the OpenCL version supported by the OpenCL device, which is not 424 // necessarily the language standard with which the program is compiled. 425 // A shared OpenCL header file requires a macro to indicate the language 426 // standard. As a workaround, __OPENCL_C_VERSION__ is defined for 427 // OpenCL v1.0 and v1.1. 428 switch (LangOpts.OpenCLVersion) { 429 case 100: 430 Builder.defineMacro("__OPENCL_C_VERSION__", "100"); 431 break; 432 case 110: 433 Builder.defineMacro("__OPENCL_C_VERSION__", "110"); 434 break; 435 case 120: 436 Builder.defineMacro("__OPENCL_C_VERSION__", "120"); 437 break; 438 case 200: 439 Builder.defineMacro("__OPENCL_C_VERSION__", "200"); 440 break; 441 default: 442 llvm_unreachable("Unsupported OpenCL version"); 443 } 444 Builder.defineMacro("CL_VERSION_1_0", "100"); 445 Builder.defineMacro("CL_VERSION_1_1", "110"); 446 Builder.defineMacro("CL_VERSION_1_2", "120"); 447 Builder.defineMacro("CL_VERSION_2_0", "200"); 448 449 if (TI.isLittleEndian()) 450 Builder.defineMacro("__ENDIAN_LITTLE__"); 451 452 if (LangOpts.FastRelaxedMath) 453 Builder.defineMacro("__FAST_RELAXED_MATH__"); 454 } 455 // Not "standard" per se, but available even with the -undef flag. 456 if (LangOpts.AsmPreprocessor) 457 Builder.defineMacro("__ASSEMBLER__"); 458 if (LangOpts.CUDA) 459 Builder.defineMacro("__CUDA__"); 460 } 461 462 /// Initialize the predefined C++ language feature test macros defined in 463 /// ISO/IEC JTC1/SC22/WG21 (C++) SD-6: "SG10 Feature Test Recommendations". 464 static void InitializeCPlusPlusFeatureTestMacros(const LangOptions &LangOpts, 465 MacroBuilder &Builder) { 466 // C++98 features. 467 if (LangOpts.RTTI) 468 Builder.defineMacro("__cpp_rtti", "199711"); 469 if (LangOpts.CXXExceptions) 470 Builder.defineMacro("__cpp_exceptions", "199711"); 471 472 // C++11 features. 473 if (LangOpts.CPlusPlus11) { 474 Builder.defineMacro("__cpp_unicode_characters", "200704"); 475 Builder.defineMacro("__cpp_raw_strings", "200710"); 476 Builder.defineMacro("__cpp_unicode_literals", "200710"); 477 Builder.defineMacro("__cpp_user_defined_literals", "200809"); 478 Builder.defineMacro("__cpp_lambdas", "200907"); 479 Builder.defineMacro("__cpp_constexpr", 480 LangOpts.CPlusPlus1z ? "201603" : 481 LangOpts.CPlusPlus14 ? "201304" : "200704"); 482 Builder.defineMacro("__cpp_range_based_for", 483 LangOpts.CPlusPlus1z ? "201603" : "200907"); 484 Builder.defineMacro("__cpp_static_assert", 485 LangOpts.CPlusPlus1z ? "201411" : "200410"); 486 Builder.defineMacro("__cpp_decltype", "200707"); 487 Builder.defineMacro("__cpp_attributes", "200809"); 488 Builder.defineMacro("__cpp_rvalue_references", "200610"); 489 Builder.defineMacro("__cpp_variadic_templates", "200704"); 490 Builder.defineMacro("__cpp_initializer_lists", "200806"); 491 Builder.defineMacro("__cpp_delegating_constructors", "200604"); 492 Builder.defineMacro("__cpp_nsdmi", "200809"); 493 Builder.defineMacro("__cpp_inheriting_constructors", "201511"); 494 Builder.defineMacro("__cpp_ref_qualifiers", "200710"); 495 Builder.defineMacro("__cpp_alias_templates", "200704"); 496 } 497 498 // C++14 features. 499 if (LangOpts.CPlusPlus14) { 500 Builder.defineMacro("__cpp_binary_literals", "201304"); 501 Builder.defineMacro("__cpp_digit_separators", "201309"); 502 Builder.defineMacro("__cpp_init_captures", "201304"); 503 Builder.defineMacro("__cpp_generic_lambdas", "201304"); 504 Builder.defineMacro("__cpp_decltype_auto", "201304"); 505 Builder.defineMacro("__cpp_return_type_deduction", "201304"); 506 Builder.defineMacro("__cpp_aggregate_nsdmi", "201304"); 507 Builder.defineMacro("__cpp_variable_templates", "201304"); 508 } 509 if (LangOpts.SizedDeallocation) 510 Builder.defineMacro("__cpp_sized_deallocation", "201309"); 511 512 // C++17 features. 513 if (LangOpts.CPlusPlus1z) { 514 Builder.defineMacro("__cpp_hex_float", "201603"); 515 Builder.defineMacro("__cpp_inline_variables", "201606"); 516 Builder.defineMacro("__cpp_noexcept_function_type", "201510"); 517 Builder.defineMacro("__cpp_capture_star_this", "201603"); 518 Builder.defineMacro("__cpp_if_constexpr", "201606"); 519 Builder.defineMacro("__cpp_template_auto", "201606"); 520 Builder.defineMacro("__cpp_namespace_attributes", "201411"); 521 Builder.defineMacro("__cpp_enumerator_attributes", "201411"); 522 Builder.defineMacro("__cpp_nested_namespace_definitions", "201411"); 523 Builder.defineMacro("__cpp_variadic_using", "201611"); 524 Builder.defineMacro("__cpp_aggregate_bases", "201603"); 525 Builder.defineMacro("__cpp_structured_bindings", "201606"); 526 Builder.defineMacro("__cpp_nontype_template_args", "201411"); 527 Builder.defineMacro("__cpp_fold_expressions", "201603"); 528 // FIXME: This is not yet listed in SD-6. 529 Builder.defineMacro("__cpp_deduction_guides", "201611"); 530 } 531 if (LangOpts.AlignedAllocation) 532 Builder.defineMacro("__cpp_aligned_new", "201606"); 533 534 // TS features. 535 if (LangOpts.ConceptsTS) 536 Builder.defineMacro("__cpp_experimental_concepts", "1"); 537 if (LangOpts.CoroutinesTS) 538 Builder.defineMacro("__cpp_coroutines", "201703L"); 539 } 540 541 static void InitializePredefinedMacros(const TargetInfo &TI, 542 const LangOptions &LangOpts, 543 const FrontendOptions &FEOpts, 544 MacroBuilder &Builder) { 545 // Compiler version introspection macros. 546 Builder.defineMacro("__llvm__"); // LLVM Backend 547 Builder.defineMacro("__clang__"); // Clang Frontend 548 #define TOSTR2(X) #X 549 #define TOSTR(X) TOSTR2(X) 550 Builder.defineMacro("__clang_major__", TOSTR(CLANG_VERSION_MAJOR)); 551 Builder.defineMacro("__clang_minor__", TOSTR(CLANG_VERSION_MINOR)); 552 Builder.defineMacro("__clang_patchlevel__", TOSTR(CLANG_VERSION_PATCHLEVEL)); 553 #undef TOSTR 554 #undef TOSTR2 555 Builder.defineMacro("__clang_version__", 556 "\"" CLANG_VERSION_STRING " " 557 + getClangFullRepositoryVersion() + "\""); 558 if (!LangOpts.MSVCCompat) { 559 // Currently claim to be compatible with GCC 4.2.1-5621, but only if we're 560 // not compiling for MSVC compatibility 561 Builder.defineMacro("__GNUC_MINOR__", "2"); 562 Builder.defineMacro("__GNUC_PATCHLEVEL__", "1"); 563 Builder.defineMacro("__GNUC__", "4"); 564 Builder.defineMacro("__GXX_ABI_VERSION", "1002"); 565 } 566 567 // Define macros for the C11 / C++11 memory orderings 568 Builder.defineMacro("__ATOMIC_RELAXED", "0"); 569 Builder.defineMacro("__ATOMIC_CONSUME", "1"); 570 Builder.defineMacro("__ATOMIC_ACQUIRE", "2"); 571 Builder.defineMacro("__ATOMIC_RELEASE", "3"); 572 Builder.defineMacro("__ATOMIC_ACQ_REL", "4"); 573 Builder.defineMacro("__ATOMIC_SEQ_CST", "5"); 574 575 // Support for #pragma redefine_extname (Sun compatibility) 576 Builder.defineMacro("__PRAGMA_REDEFINE_EXTNAME", "1"); 577 578 // As sad as it is, enough software depends on the __VERSION__ for version 579 // checks that it is necessary to report 4.2.1 (the base GCC version we claim 580 // compatibility with) first. 581 Builder.defineMacro("__VERSION__", "\"4.2.1 Compatible " + 582 Twine(getClangFullCPPVersion()) + "\""); 583 584 // Initialize language-specific preprocessor defines. 585 586 // Standard conforming mode? 587 if (!LangOpts.GNUMode && !LangOpts.MSVCCompat) 588 Builder.defineMacro("__STRICT_ANSI__"); 589 590 if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus11) 591 Builder.defineMacro("__GXX_EXPERIMENTAL_CXX0X__"); 592 593 if (LangOpts.ObjC1) { 594 if (LangOpts.ObjCRuntime.isNonFragile()) { 595 Builder.defineMacro("__OBJC2__"); 596 597 if (LangOpts.ObjCExceptions) 598 Builder.defineMacro("OBJC_ZEROCOST_EXCEPTIONS"); 599 } 600 601 if (LangOpts.getGC() != LangOptions::NonGC) 602 Builder.defineMacro("__OBJC_GC__"); 603 604 if (LangOpts.ObjCRuntime.isNeXTFamily()) 605 Builder.defineMacro("__NEXT_RUNTIME__"); 606 607 if (LangOpts.ObjCRuntime.getKind() == ObjCRuntime::ObjFW) { 608 VersionTuple tuple = LangOpts.ObjCRuntime.getVersion(); 609 610 unsigned minor = 0; 611 if (tuple.getMinor().hasValue()) 612 minor = tuple.getMinor().getValue(); 613 614 unsigned subminor = 0; 615 if (tuple.getSubminor().hasValue()) 616 subminor = tuple.getSubminor().getValue(); 617 618 Builder.defineMacro("__OBJFW_RUNTIME_ABI__", 619 Twine(tuple.getMajor() * 10000 + minor * 100 + 620 subminor)); 621 } 622 623 Builder.defineMacro("IBOutlet", "__attribute__((iboutlet))"); 624 Builder.defineMacro("IBOutletCollection(ClassName)", 625 "__attribute__((iboutletcollection(ClassName)))"); 626 Builder.defineMacro("IBAction", "void)__attribute__((ibaction)"); 627 Builder.defineMacro("IBInspectable", ""); 628 Builder.defineMacro("IB_DESIGNABLE", ""); 629 } 630 631 // Define a macro that describes the Objective-C boolean type even for C 632 // and C++ since BOOL can be used from non Objective-C code. 633 Builder.defineMacro("__OBJC_BOOL_IS_BOOL", 634 Twine(TI.useSignedCharForObjCBool() ? "0" : "1")); 635 636 if (LangOpts.CPlusPlus) 637 InitializeCPlusPlusFeatureTestMacros(LangOpts, Builder); 638 639 // darwin_constant_cfstrings controls this. This is also dependent 640 // on other things like the runtime I believe. This is set even for C code. 641 if (!LangOpts.NoConstantCFStrings) 642 Builder.defineMacro("__CONSTANT_CFSTRINGS__"); 643 644 if (LangOpts.ObjC2) 645 Builder.defineMacro("OBJC_NEW_PROPERTIES"); 646 647 if (LangOpts.PascalStrings) 648 Builder.defineMacro("__PASCAL_STRINGS__"); 649 650 if (LangOpts.Blocks) { 651 Builder.defineMacro("__block", "__attribute__((__blocks__(byref)))"); 652 Builder.defineMacro("__BLOCKS__"); 653 } 654 655 if (!LangOpts.MSVCCompat && LangOpts.Exceptions) 656 Builder.defineMacro("__EXCEPTIONS"); 657 if (!LangOpts.MSVCCompat && LangOpts.RTTI) 658 Builder.defineMacro("__GXX_RTTI"); 659 if (LangOpts.SjLjExceptions) 660 Builder.defineMacro("__USING_SJLJ_EXCEPTIONS__"); 661 662 if (LangOpts.Deprecated) 663 Builder.defineMacro("__DEPRECATED"); 664 665 if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus) { 666 Builder.defineMacro("__GNUG__", "4"); 667 Builder.defineMacro("__GXX_WEAK__"); 668 Builder.defineMacro("__private_extern__", "extern"); 669 } 670 671 if (LangOpts.MicrosoftExt) { 672 if (LangOpts.WChar) { 673 // wchar_t supported as a keyword. 674 Builder.defineMacro("_WCHAR_T_DEFINED"); 675 Builder.defineMacro("_NATIVE_WCHAR_T_DEFINED"); 676 } 677 } 678 679 if (LangOpts.Optimize) 680 Builder.defineMacro("__OPTIMIZE__"); 681 if (LangOpts.OptimizeSize) 682 Builder.defineMacro("__OPTIMIZE_SIZE__"); 683 684 if (LangOpts.FastMath) 685 Builder.defineMacro("__FAST_MATH__"); 686 687 // Initialize target-specific preprocessor defines. 688 689 // __BYTE_ORDER__ was added in GCC 4.6. It's analogous 690 // to the macro __BYTE_ORDER (no trailing underscores) 691 // from glibc's <endian.h> header. 692 // We don't support the PDP-11 as a target, but include 693 // the define so it can still be compared against. 694 Builder.defineMacro("__ORDER_LITTLE_ENDIAN__", "1234"); 695 Builder.defineMacro("__ORDER_BIG_ENDIAN__", "4321"); 696 Builder.defineMacro("__ORDER_PDP_ENDIAN__", "3412"); 697 if (TI.isBigEndian()) { 698 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_BIG_ENDIAN__"); 699 Builder.defineMacro("__BIG_ENDIAN__"); 700 } else { 701 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_LITTLE_ENDIAN__"); 702 Builder.defineMacro("__LITTLE_ENDIAN__"); 703 } 704 705 if (TI.getPointerWidth(0) == 64 && TI.getLongWidth() == 64 706 && TI.getIntWidth() == 32) { 707 Builder.defineMacro("_LP64"); 708 Builder.defineMacro("__LP64__"); 709 } 710 711 if (TI.getPointerWidth(0) == 32 && TI.getLongWidth() == 32 712 && TI.getIntWidth() == 32) { 713 Builder.defineMacro("_ILP32"); 714 Builder.defineMacro("__ILP32__"); 715 } 716 717 // Define type sizing macros based on the target properties. 718 assert(TI.getCharWidth() == 8 && "Only support 8-bit char so far"); 719 Builder.defineMacro("__CHAR_BIT__", Twine(TI.getCharWidth())); 720 721 DefineTypeSize("__SCHAR_MAX__", TargetInfo::SignedChar, TI, Builder); 722 DefineTypeSize("__SHRT_MAX__", TargetInfo::SignedShort, TI, Builder); 723 DefineTypeSize("__INT_MAX__", TargetInfo::SignedInt, TI, Builder); 724 DefineTypeSize("__LONG_MAX__", TargetInfo::SignedLong, TI, Builder); 725 DefineTypeSize("__LONG_LONG_MAX__", TargetInfo::SignedLongLong, TI, Builder); 726 DefineTypeSize("__WCHAR_MAX__", TI.getWCharType(), TI, Builder); 727 DefineTypeSize("__INTMAX_MAX__", TI.getIntMaxType(), TI, Builder); 728 DefineTypeSize("__SIZE_MAX__", TI.getSizeType(), TI, Builder); 729 730 DefineTypeSize("__UINTMAX_MAX__", TI.getUIntMaxType(), TI, Builder); 731 DefineTypeSize("__PTRDIFF_MAX__", TI.getPtrDiffType(0), TI, Builder); 732 DefineTypeSize("__INTPTR_MAX__", TI.getIntPtrType(), TI, Builder); 733 DefineTypeSize("__UINTPTR_MAX__", TI.getUIntPtrType(), TI, Builder); 734 735 DefineTypeSizeof("__SIZEOF_DOUBLE__", TI.getDoubleWidth(), TI, Builder); 736 DefineTypeSizeof("__SIZEOF_FLOAT__", TI.getFloatWidth(), TI, Builder); 737 DefineTypeSizeof("__SIZEOF_INT__", TI.getIntWidth(), TI, Builder); 738 DefineTypeSizeof("__SIZEOF_LONG__", TI.getLongWidth(), TI, Builder); 739 DefineTypeSizeof("__SIZEOF_LONG_DOUBLE__",TI.getLongDoubleWidth(),TI,Builder); 740 DefineTypeSizeof("__SIZEOF_LONG_LONG__", TI.getLongLongWidth(), TI, Builder); 741 DefineTypeSizeof("__SIZEOF_POINTER__", TI.getPointerWidth(0), TI, Builder); 742 DefineTypeSizeof("__SIZEOF_SHORT__", TI.getShortWidth(), TI, Builder); 743 DefineTypeSizeof("__SIZEOF_PTRDIFF_T__", 744 TI.getTypeWidth(TI.getPtrDiffType(0)), TI, Builder); 745 DefineTypeSizeof("__SIZEOF_SIZE_T__", 746 TI.getTypeWidth(TI.getSizeType()), TI, Builder); 747 DefineTypeSizeof("__SIZEOF_WCHAR_T__", 748 TI.getTypeWidth(TI.getWCharType()), TI, Builder); 749 DefineTypeSizeof("__SIZEOF_WINT_T__", 750 TI.getTypeWidth(TI.getWIntType()), TI, Builder); 751 if (TI.hasInt128Type()) 752 DefineTypeSizeof("__SIZEOF_INT128__", 128, TI, Builder); 753 if (TI.hasFloat128Type()) 754 DefineTypeSizeof("__SIZEOF_FLOAT128__", 128, TI, Builder); 755 756 DefineType("__INTMAX_TYPE__", TI.getIntMaxType(), Builder); 757 DefineFmt("__INTMAX", TI.getIntMaxType(), TI, Builder); 758 Builder.defineMacro("__INTMAX_C_SUFFIX__", 759 TI.getTypeConstantSuffix(TI.getIntMaxType())); 760 DefineType("__UINTMAX_TYPE__", TI.getUIntMaxType(), Builder); 761 DefineFmt("__UINTMAX", TI.getUIntMaxType(), TI, Builder); 762 Builder.defineMacro("__UINTMAX_C_SUFFIX__", 763 TI.getTypeConstantSuffix(TI.getUIntMaxType())); 764 DefineTypeWidth("__INTMAX_WIDTH__", TI.getIntMaxType(), TI, Builder); 765 DefineType("__PTRDIFF_TYPE__", TI.getPtrDiffType(0), Builder); 766 DefineFmt("__PTRDIFF", TI.getPtrDiffType(0), TI, Builder); 767 DefineTypeWidth("__PTRDIFF_WIDTH__", TI.getPtrDiffType(0), TI, Builder); 768 DefineType("__INTPTR_TYPE__", TI.getIntPtrType(), Builder); 769 DefineFmt("__INTPTR", TI.getIntPtrType(), TI, Builder); 770 DefineTypeWidth("__INTPTR_WIDTH__", TI.getIntPtrType(), TI, Builder); 771 DefineType("__SIZE_TYPE__", TI.getSizeType(), Builder); 772 DefineFmt("__SIZE", TI.getSizeType(), TI, Builder); 773 DefineTypeWidth("__SIZE_WIDTH__", TI.getSizeType(), TI, Builder); 774 DefineType("__WCHAR_TYPE__", TI.getWCharType(), Builder); 775 DefineTypeWidth("__WCHAR_WIDTH__", TI.getWCharType(), TI, Builder); 776 DefineType("__WINT_TYPE__", TI.getWIntType(), Builder); 777 DefineTypeWidth("__WINT_WIDTH__", TI.getWIntType(), TI, Builder); 778 DefineTypeWidth("__SIG_ATOMIC_WIDTH__", TI.getSigAtomicType(), TI, Builder); 779 DefineTypeSize("__SIG_ATOMIC_MAX__", TI.getSigAtomicType(), TI, Builder); 780 DefineType("__CHAR16_TYPE__", TI.getChar16Type(), Builder); 781 DefineType("__CHAR32_TYPE__", TI.getChar32Type(), Builder); 782 783 DefineTypeWidth("__UINTMAX_WIDTH__", TI.getUIntMaxType(), TI, Builder); 784 DefineType("__UINTPTR_TYPE__", TI.getUIntPtrType(), Builder); 785 DefineFmt("__UINTPTR", TI.getUIntPtrType(), TI, Builder); 786 DefineTypeWidth("__UINTPTR_WIDTH__", TI.getUIntPtrType(), TI, Builder); 787 788 DefineFloatMacros(Builder, "FLT", &TI.getFloatFormat(), "F"); 789 DefineFloatMacros(Builder, "DBL", &TI.getDoubleFormat(), ""); 790 DefineFloatMacros(Builder, "LDBL", &TI.getLongDoubleFormat(), "L"); 791 792 // Define a __POINTER_WIDTH__ macro for stdint.h. 793 Builder.defineMacro("__POINTER_WIDTH__", 794 Twine((int)TI.getPointerWidth(0))); 795 796 // Define __BIGGEST_ALIGNMENT__ to be compatible with gcc. 797 Builder.defineMacro("__BIGGEST_ALIGNMENT__", 798 Twine(TI.getSuitableAlign() / TI.getCharWidth()) ); 799 800 if (!LangOpts.CharIsSigned) 801 Builder.defineMacro("__CHAR_UNSIGNED__"); 802 803 if (!TargetInfo::isTypeSigned(TI.getWCharType())) 804 Builder.defineMacro("__WCHAR_UNSIGNED__"); 805 806 if (!TargetInfo::isTypeSigned(TI.getWIntType())) 807 Builder.defineMacro("__WINT_UNSIGNED__"); 808 809 // Define exact-width integer types for stdint.h 810 DefineExactWidthIntType(TargetInfo::SignedChar, TI, Builder); 811 812 if (TI.getShortWidth() > TI.getCharWidth()) 813 DefineExactWidthIntType(TargetInfo::SignedShort, TI, Builder); 814 815 if (TI.getIntWidth() > TI.getShortWidth()) 816 DefineExactWidthIntType(TargetInfo::SignedInt, TI, Builder); 817 818 if (TI.getLongWidth() > TI.getIntWidth()) 819 DefineExactWidthIntType(TargetInfo::SignedLong, TI, Builder); 820 821 if (TI.getLongLongWidth() > TI.getLongWidth()) 822 DefineExactWidthIntType(TargetInfo::SignedLongLong, TI, Builder); 823 824 DefineExactWidthIntType(TargetInfo::UnsignedChar, TI, Builder); 825 DefineExactWidthIntTypeSize(TargetInfo::UnsignedChar, TI, Builder); 826 DefineExactWidthIntTypeSize(TargetInfo::SignedChar, TI, Builder); 827 828 if (TI.getShortWidth() > TI.getCharWidth()) { 829 DefineExactWidthIntType(TargetInfo::UnsignedShort, TI, Builder); 830 DefineExactWidthIntTypeSize(TargetInfo::UnsignedShort, TI, Builder); 831 DefineExactWidthIntTypeSize(TargetInfo::SignedShort, TI, Builder); 832 } 833 834 if (TI.getIntWidth() > TI.getShortWidth()) { 835 DefineExactWidthIntType(TargetInfo::UnsignedInt, TI, Builder); 836 DefineExactWidthIntTypeSize(TargetInfo::UnsignedInt, TI, Builder); 837 DefineExactWidthIntTypeSize(TargetInfo::SignedInt, TI, Builder); 838 } 839 840 if (TI.getLongWidth() > TI.getIntWidth()) { 841 DefineExactWidthIntType(TargetInfo::UnsignedLong, TI, Builder); 842 DefineExactWidthIntTypeSize(TargetInfo::UnsignedLong, TI, Builder); 843 DefineExactWidthIntTypeSize(TargetInfo::SignedLong, TI, Builder); 844 } 845 846 if (TI.getLongLongWidth() > TI.getLongWidth()) { 847 DefineExactWidthIntType(TargetInfo::UnsignedLongLong, TI, Builder); 848 DefineExactWidthIntTypeSize(TargetInfo::UnsignedLongLong, TI, Builder); 849 DefineExactWidthIntTypeSize(TargetInfo::SignedLongLong, TI, Builder); 850 } 851 852 DefineLeastWidthIntType(8, true, TI, Builder); 853 DefineLeastWidthIntType(8, false, TI, Builder); 854 DefineLeastWidthIntType(16, true, TI, Builder); 855 DefineLeastWidthIntType(16, false, TI, Builder); 856 DefineLeastWidthIntType(32, true, TI, Builder); 857 DefineLeastWidthIntType(32, false, TI, Builder); 858 DefineLeastWidthIntType(64, true, TI, Builder); 859 DefineLeastWidthIntType(64, false, TI, Builder); 860 861 DefineFastIntType(8, true, TI, Builder); 862 DefineFastIntType(8, false, TI, Builder); 863 DefineFastIntType(16, true, TI, Builder); 864 DefineFastIntType(16, false, TI, Builder); 865 DefineFastIntType(32, true, TI, Builder); 866 DefineFastIntType(32, false, TI, Builder); 867 DefineFastIntType(64, true, TI, Builder); 868 DefineFastIntType(64, false, TI, Builder); 869 870 char UserLabelPrefix[2] = {TI.getDataLayout().getGlobalPrefix(), 0}; 871 Builder.defineMacro("__USER_LABEL_PREFIX__", UserLabelPrefix); 872 873 if (LangOpts.FastMath || LangOpts.FiniteMathOnly) 874 Builder.defineMacro("__FINITE_MATH_ONLY__", "1"); 875 else 876 Builder.defineMacro("__FINITE_MATH_ONLY__", "0"); 877 878 if (!LangOpts.MSVCCompat) { 879 if (LangOpts.GNUInline || LangOpts.CPlusPlus) 880 Builder.defineMacro("__GNUC_GNU_INLINE__"); 881 else 882 Builder.defineMacro("__GNUC_STDC_INLINE__"); 883 884 // The value written by __atomic_test_and_set. 885 // FIXME: This is target-dependent. 886 Builder.defineMacro("__GCC_ATOMIC_TEST_AND_SET_TRUEVAL", "1"); 887 } 888 889 auto addLockFreeMacros = [&](const llvm::Twine &Prefix) { 890 // Used by libc++ and libstdc++ to implement ATOMIC_<foo>_LOCK_FREE. 891 unsigned InlineWidthBits = TI.getMaxAtomicInlineWidth(); 892 #define DEFINE_LOCK_FREE_MACRO(TYPE, Type) \ 893 Builder.defineMacro(Prefix + #TYPE "_LOCK_FREE", \ 894 getLockFreeValue(TI.get##Type##Width(), \ 895 TI.get##Type##Align(), \ 896 InlineWidthBits)); 897 DEFINE_LOCK_FREE_MACRO(BOOL, Bool); 898 DEFINE_LOCK_FREE_MACRO(CHAR, Char); 899 DEFINE_LOCK_FREE_MACRO(CHAR16_T, Char16); 900 DEFINE_LOCK_FREE_MACRO(CHAR32_T, Char32); 901 DEFINE_LOCK_FREE_MACRO(WCHAR_T, WChar); 902 DEFINE_LOCK_FREE_MACRO(SHORT, Short); 903 DEFINE_LOCK_FREE_MACRO(INT, Int); 904 DEFINE_LOCK_FREE_MACRO(LONG, Long); 905 DEFINE_LOCK_FREE_MACRO(LLONG, LongLong); 906 Builder.defineMacro(Prefix + "POINTER_LOCK_FREE", 907 getLockFreeValue(TI.getPointerWidth(0), 908 TI.getPointerAlign(0), 909 InlineWidthBits)); 910 #undef DEFINE_LOCK_FREE_MACRO 911 }; 912 addLockFreeMacros("__CLANG_ATOMIC_"); 913 if (!LangOpts.MSVCCompat) 914 addLockFreeMacros("__GCC_ATOMIC_"); 915 916 if (LangOpts.NoInlineDefine) 917 Builder.defineMacro("__NO_INLINE__"); 918 919 if (unsigned PICLevel = LangOpts.PICLevel) { 920 Builder.defineMacro("__PIC__", Twine(PICLevel)); 921 Builder.defineMacro("__pic__", Twine(PICLevel)); 922 if (LangOpts.PIE) { 923 Builder.defineMacro("__PIE__", Twine(PICLevel)); 924 Builder.defineMacro("__pie__", Twine(PICLevel)); 925 } 926 } 927 928 // Macros to control C99 numerics and <float.h> 929 Builder.defineMacro("__FLT_EVAL_METHOD__", Twine(TI.getFloatEvalMethod())); 930 Builder.defineMacro("__FLT_RADIX__", "2"); 931 Builder.defineMacro("__DECIMAL_DIG__", "__LDBL_DECIMAL_DIG__"); 932 933 if (LangOpts.getStackProtector() == LangOptions::SSPOn) 934 Builder.defineMacro("__SSP__"); 935 else if (LangOpts.getStackProtector() == LangOptions::SSPStrong) 936 Builder.defineMacro("__SSP_STRONG__", "2"); 937 else if (LangOpts.getStackProtector() == LangOptions::SSPReq) 938 Builder.defineMacro("__SSP_ALL__", "3"); 939 940 // Define a macro that exists only when using the static analyzer. 941 if (FEOpts.ProgramAction == frontend::RunAnalysis) 942 Builder.defineMacro("__clang_analyzer__"); 943 944 if (LangOpts.FastRelaxedMath) 945 Builder.defineMacro("__FAST_RELAXED_MATH__"); 946 947 if (FEOpts.ProgramAction == frontend::RewriteObjC || 948 LangOpts.getGC() != LangOptions::NonGC) { 949 Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))"); 950 Builder.defineMacro("__strong", "__attribute__((objc_gc(strong)))"); 951 Builder.defineMacro("__autoreleasing", ""); 952 Builder.defineMacro("__unsafe_unretained", ""); 953 } else if (LangOpts.ObjC1) { 954 Builder.defineMacro("__weak", "__attribute__((objc_ownership(weak)))"); 955 Builder.defineMacro("__strong", "__attribute__((objc_ownership(strong)))"); 956 Builder.defineMacro("__autoreleasing", 957 "__attribute__((objc_ownership(autoreleasing)))"); 958 Builder.defineMacro("__unsafe_unretained", 959 "__attribute__((objc_ownership(none)))"); 960 } 961 962 // On Darwin, there are __double_underscored variants of the type 963 // nullability qualifiers. 964 if (TI.getTriple().isOSDarwin()) { 965 Builder.defineMacro("__nonnull", "_Nonnull"); 966 Builder.defineMacro("__null_unspecified", "_Null_unspecified"); 967 Builder.defineMacro("__nullable", "_Nullable"); 968 } 969 970 // OpenMP definition 971 // OpenMP 2.2: 972 // In implementations that support a preprocessor, the _OPENMP 973 // macro name is defined to have the decimal value yyyymm where 974 // yyyy and mm are the year and the month designations of the 975 // version of the OpenMP API that the implementation support. 976 switch (LangOpts.OpenMP) { 977 case 0: 978 break; 979 case 40: 980 Builder.defineMacro("_OPENMP", "201307"); 981 break; 982 case 45: 983 Builder.defineMacro("_OPENMP", "201511"); 984 break; 985 default: 986 // Default version is OpenMP 3.1 987 Builder.defineMacro("_OPENMP", "201107"); 988 break; 989 } 990 991 // CUDA device path compilaton 992 if (LangOpts.CUDAIsDevice) { 993 // The CUDA_ARCH value is set for the GPU target specified in the NVPTX 994 // backend's target defines. 995 Builder.defineMacro("__CUDA_ARCH__"); 996 } 997 998 // We need to communicate this to our CUDA header wrapper, which in turn 999 // informs the proper CUDA headers of this choice. 1000 if (LangOpts.CUDADeviceApproxTranscendentals || LangOpts.FastMath) { 1001 Builder.defineMacro("__CLANG_CUDA_APPROX_TRANSCENDENTALS__"); 1002 } 1003 1004 // OpenCL definitions. 1005 if (LangOpts.OpenCL) { 1006 #define OPENCLEXT(Ext) \ 1007 if (TI.getSupportedOpenCLOpts().isSupported(#Ext, \ 1008 LangOpts.OpenCLVersion)) \ 1009 Builder.defineMacro(#Ext); 1010 #include "clang/Basic/OpenCLExtensions.def" 1011 } 1012 1013 if (TI.hasInt128Type() && LangOpts.CPlusPlus && LangOpts.GNUMode) { 1014 // For each extended integer type, g++ defines a macro mapping the 1015 // index of the type (0 in this case) in some list of extended types 1016 // to the type. 1017 Builder.defineMacro("__GLIBCXX_TYPE_INT_N_0", "__int128"); 1018 Builder.defineMacro("__GLIBCXX_BITSIZE_INT_N_0", "128"); 1019 } 1020 1021 // Get other target #defines. 1022 TI.getTargetDefines(LangOpts, Builder); 1023 } 1024 1025 /// InitializePreprocessor - Initialize the preprocessor getting it and the 1026 /// environment ready to process a single file. This returns true on error. 1027 /// 1028 void clang::InitializePreprocessor( 1029 Preprocessor &PP, const PreprocessorOptions &InitOpts, 1030 const PCHContainerReader &PCHContainerRdr, 1031 const FrontendOptions &FEOpts) { 1032 const LangOptions &LangOpts = PP.getLangOpts(); 1033 std::string PredefineBuffer; 1034 PredefineBuffer.reserve(4080); 1035 llvm::raw_string_ostream Predefines(PredefineBuffer); 1036 MacroBuilder Builder(Predefines); 1037 1038 // Emit line markers for various builtin sections of the file. We don't do 1039 // this in asm preprocessor mode, because "# 4" is not a line marker directive 1040 // in this mode. 1041 if (!PP.getLangOpts().AsmPreprocessor) 1042 Builder.append("# 1 \"<built-in>\" 3"); 1043 1044 // Install things like __POWERPC__, __GNUC__, etc into the macro table. 1045 if (InitOpts.UsePredefines) { 1046 // FIXME: This will create multiple definitions for most of the predefined 1047 // macros. This is not the right way to handle this. 1048 if (LangOpts.CUDA && PP.getAuxTargetInfo()) 1049 InitializePredefinedMacros(*PP.getAuxTargetInfo(), LangOpts, FEOpts, 1050 Builder); 1051 1052 InitializePredefinedMacros(PP.getTargetInfo(), LangOpts, FEOpts, Builder); 1053 1054 // Install definitions to make Objective-C++ ARC work well with various 1055 // C++ Standard Library implementations. 1056 if (LangOpts.ObjC1 && LangOpts.CPlusPlus && 1057 (LangOpts.ObjCAutoRefCount || LangOpts.ObjCWeak)) { 1058 switch (InitOpts.ObjCXXARCStandardLibrary) { 1059 case ARCXX_nolib: 1060 case ARCXX_libcxx: 1061 break; 1062 1063 case ARCXX_libstdcxx: 1064 AddObjCXXARCLibstdcxxDefines(LangOpts, Builder); 1065 break; 1066 } 1067 } 1068 } 1069 1070 // Even with predefines off, some macros are still predefined. 1071 // These should all be defined in the preprocessor according to the 1072 // current language configuration. 1073 InitializeStandardPredefinedMacros(PP.getTargetInfo(), PP.getLangOpts(), 1074 FEOpts, Builder); 1075 1076 // Add on the predefines from the driver. Wrap in a #line directive to report 1077 // that they come from the command line. 1078 if (!PP.getLangOpts().AsmPreprocessor) 1079 Builder.append("# 1 \"<command line>\" 1"); 1080 1081 // Process #define's and #undef's in the order they are given. 1082 for (unsigned i = 0, e = InitOpts.Macros.size(); i != e; ++i) { 1083 if (InitOpts.Macros[i].second) // isUndef 1084 Builder.undefineMacro(InitOpts.Macros[i].first); 1085 else 1086 DefineBuiltinMacro(Builder, InitOpts.Macros[i].first, 1087 PP.getDiagnostics()); 1088 } 1089 1090 // Exit the command line and go back to <built-in> (2 is LC_LEAVE). 1091 if (!PP.getLangOpts().AsmPreprocessor) 1092 Builder.append("# 1 \"<built-in>\" 2"); 1093 1094 // If -imacros are specified, include them now. These are processed before 1095 // any -include directives. 1096 for (unsigned i = 0, e = InitOpts.MacroIncludes.size(); i != e; ++i) 1097 AddImplicitIncludeMacros(Builder, InitOpts.MacroIncludes[i]); 1098 1099 // Process -include-pch/-include-pth directives. 1100 if (!InitOpts.ImplicitPCHInclude.empty()) 1101 AddImplicitIncludePCH(Builder, PP, PCHContainerRdr, 1102 InitOpts.ImplicitPCHInclude); 1103 if (!InitOpts.ImplicitPTHInclude.empty()) 1104 AddImplicitIncludePTH(Builder, PP, InitOpts.ImplicitPTHInclude); 1105 1106 // Process -include directives. 1107 for (unsigned i = 0, e = InitOpts.Includes.size(); i != e; ++i) { 1108 const std::string &Path = InitOpts.Includes[i]; 1109 AddImplicitInclude(Builder, Path); 1110 } 1111 1112 // Instruct the preprocessor to skip the preamble. 1113 PP.setSkipMainFilePreamble(InitOpts.PrecompiledPreambleBytes.first, 1114 InitOpts.PrecompiledPreambleBytes.second); 1115 1116 // Copy PredefinedBuffer into the Preprocessor. 1117 PP.setPredefines(Predefines.str()); 1118 } 1119