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/Frontend/Utils.h" 15 #include "clang/Basic/FileManager.h" 16 #include "clang/Basic/MacroBuilder.h" 17 #include "clang/Basic/SourceManager.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/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 #include "llvm/Support/FileSystem.h" 29 #include "llvm/Support/MemoryBuffer.h" 30 #include "llvm/Support/Path.h" 31 using namespace clang; 32 33 static bool MacroBodyEndsInBackslash(StringRef MacroBody) { 34 while (!MacroBody.empty() && isWhitespace(MacroBody.back())) 35 MacroBody = MacroBody.drop_back(); 36 return !MacroBody.empty() && MacroBody.back() == '\\'; 37 } 38 39 // Append a #define line to Buf for Macro. Macro should be of the form XXX, 40 // in which case we emit "#define XXX 1" or "XXX=Y z W" in which case we emit 41 // "#define XXX Y z W". To get a #define with no value, use "XXX=". 42 static void DefineBuiltinMacro(MacroBuilder &Builder, StringRef Macro, 43 DiagnosticsEngine &Diags) { 44 std::pair<StringRef, StringRef> MacroPair = Macro.split('='); 45 StringRef MacroName = MacroPair.first; 46 StringRef MacroBody = MacroPair.second; 47 if (MacroName.size() != Macro.size()) { 48 // Per GCC -D semantics, the macro ends at \n if it exists. 49 StringRef::size_type End = MacroBody.find_first_of("\n\r"); 50 if (End != StringRef::npos) 51 Diags.Report(diag::warn_fe_macro_contains_embedded_newline) 52 << MacroName; 53 MacroBody = MacroBody.substr(0, End); 54 // We handle macro bodies which end in a backslash by appending an extra 55 // backslash+newline. This makes sure we don't accidentally treat the 56 // backslash as a line continuation marker. 57 if (MacroBodyEndsInBackslash(MacroBody)) 58 Builder.defineMacro(MacroName, Twine(MacroBody) + "\\\n"); 59 else 60 Builder.defineMacro(MacroName, MacroBody); 61 } else { 62 // Push "macroname 1". 63 Builder.defineMacro(Macro); 64 } 65 } 66 67 /// AddImplicitInclude - Add an implicit \#include of the specified file to the 68 /// predefines buffer. 69 /// As these includes are generated by -include arguments the header search 70 /// logic is going to search relatively to the current working directory. 71 static void AddImplicitInclude(MacroBuilder &Builder, StringRef File) { 72 Builder.append(Twine("#include \"") + File + "\""); 73 } 74 75 static void AddImplicitIncludeMacros(MacroBuilder &Builder, StringRef File) { 76 Builder.append(Twine("#__include_macros \"") + File + "\""); 77 // Marker token to stop the __include_macros fetch loop. 78 Builder.append("##"); // ##? 79 } 80 81 /// AddImplicitIncludePTH - Add an implicit \#include using the original file 82 /// used to generate a PTH cache. 83 static void AddImplicitIncludePTH(MacroBuilder &Builder, Preprocessor &PP, 84 StringRef ImplicitIncludePTH) { 85 PTHManager *P = PP.getPTHManager(); 86 // Null check 'P' in the corner case where it couldn't be created. 87 const char *OriginalFile = P ? P->getOriginalSourceFile() : nullptr; 88 89 if (!OriginalFile) { 90 PP.getDiagnostics().Report(diag::err_fe_pth_file_has_no_source_header) 91 << ImplicitIncludePTH; 92 return; 93 } 94 95 AddImplicitInclude(Builder, OriginalFile); 96 } 97 98 /// \brief Add an implicit \#include using the original file used to generate 99 /// a PCH file. 100 static void AddImplicitIncludePCH(MacroBuilder &Builder, Preprocessor &PP, 101 const PCHContainerReader &PCHContainerRdr, 102 StringRef ImplicitIncludePCH) { 103 std::string OriginalFile = 104 ASTReader::getOriginalSourceFile(ImplicitIncludePCH, PP.getFileManager(), 105 PCHContainerRdr, PP.getDiagnostics()); 106 if (OriginalFile.empty()) 107 return; 108 109 AddImplicitInclude(Builder, OriginalFile); 110 } 111 112 /// PickFP - This is used to pick a value based on the FP semantics of the 113 /// specified FP model. 114 template <typename T> 115 static T PickFP(const llvm::fltSemantics *Sem, T IEEESingleVal, 116 T IEEEDoubleVal, T X87DoubleExtendedVal, T PPCDoubleDoubleVal, 117 T IEEEQuadVal) { 118 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEsingle) 119 return IEEESingleVal; 120 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEdouble) 121 return IEEEDoubleVal; 122 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::x87DoubleExtended) 123 return X87DoubleExtendedVal; 124 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::PPCDoubleDouble) 125 return PPCDoubleDoubleVal; 126 assert(Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEquad); 127 return IEEEQuadVal; 128 } 129 130 static void DefineFloatMacros(MacroBuilder &Builder, StringRef Prefix, 131 const llvm::fltSemantics *Sem, StringRef Ext) { 132 const char *DenormMin, *Epsilon, *Max, *Min; 133 DenormMin = PickFP(Sem, "1.40129846e-45", "4.9406564584124654e-324", 134 "3.64519953188247460253e-4951", 135 "4.94065645841246544176568792868221e-324", 136 "6.47517511943802511092443895822764655e-4966"); 137 int Digits = PickFP(Sem, 6, 15, 18, 31, 33); 138 int DecimalDigits = PickFP(Sem, 9, 17, 21, 33, 36); 139 Epsilon = PickFP(Sem, "1.19209290e-7", "2.2204460492503131e-16", 140 "1.08420217248550443401e-19", 141 "4.94065645841246544176568792868221e-324", 142 "1.92592994438723585305597794258492732e-34"); 143 int MantissaDigits = PickFP(Sem, 24, 53, 64, 106, 113); 144 int Min10Exp = PickFP(Sem, -37, -307, -4931, -291, -4931); 145 int Max10Exp = PickFP(Sem, 38, 308, 4932, 308, 4932); 146 int MinExp = PickFP(Sem, -125, -1021, -16381, -968, -16381); 147 int MaxExp = PickFP(Sem, 128, 1024, 16384, 1024, 16384); 148 Min = PickFP(Sem, "1.17549435e-38", "2.2250738585072014e-308", 149 "3.36210314311209350626e-4932", 150 "2.00416836000897277799610805135016e-292", 151 "3.36210314311209350626267781732175260e-4932"); 152 Max = PickFP(Sem, "3.40282347e+38", "1.7976931348623157e+308", 153 "1.18973149535723176502e+4932", 154 "1.79769313486231580793728971405301e+308", 155 "1.18973149535723176508575932662800702e+4932"); 156 157 SmallString<32> DefPrefix; 158 DefPrefix = "__"; 159 DefPrefix += Prefix; 160 DefPrefix += "_"; 161 162 Builder.defineMacro(DefPrefix + "DENORM_MIN__", Twine(DenormMin)+Ext); 163 Builder.defineMacro(DefPrefix + "HAS_DENORM__"); 164 Builder.defineMacro(DefPrefix + "DIG__", Twine(Digits)); 165 Builder.defineMacro(DefPrefix + "DECIMAL_DIG__", Twine(DecimalDigits)); 166 Builder.defineMacro(DefPrefix + "EPSILON__", Twine(Epsilon)+Ext); 167 Builder.defineMacro(DefPrefix + "HAS_INFINITY__"); 168 Builder.defineMacro(DefPrefix + "HAS_QUIET_NAN__"); 169 Builder.defineMacro(DefPrefix + "MANT_DIG__", Twine(MantissaDigits)); 170 171 Builder.defineMacro(DefPrefix + "MAX_10_EXP__", Twine(Max10Exp)); 172 Builder.defineMacro(DefPrefix + "MAX_EXP__", Twine(MaxExp)); 173 Builder.defineMacro(DefPrefix + "MAX__", Twine(Max)+Ext); 174 175 Builder.defineMacro(DefPrefix + "MIN_10_EXP__","("+Twine(Min10Exp)+")"); 176 Builder.defineMacro(DefPrefix + "MIN_EXP__", "("+Twine(MinExp)+")"); 177 Builder.defineMacro(DefPrefix + "MIN__", Twine(Min)+Ext); 178 } 179 180 181 /// DefineTypeSize - Emit a macro to the predefines buffer that declares a macro 182 /// named MacroName with the max value for a type with width 'TypeWidth' a 183 /// signedness of 'isSigned' and with a value suffix of 'ValSuffix' (e.g. LL). 184 static void DefineTypeSize(const Twine &MacroName, unsigned TypeWidth, 185 StringRef ValSuffix, bool isSigned, 186 MacroBuilder &Builder) { 187 llvm::APInt MaxVal = isSigned ? llvm::APInt::getSignedMaxValue(TypeWidth) 188 : llvm::APInt::getMaxValue(TypeWidth); 189 Builder.defineMacro(MacroName, MaxVal.toString(10, isSigned) + ValSuffix); 190 } 191 192 /// DefineTypeSize - An overloaded helper that uses TargetInfo to determine 193 /// the width, suffix, and signedness of the given type 194 static void DefineTypeSize(const Twine &MacroName, TargetInfo::IntType Ty, 195 const TargetInfo &TI, MacroBuilder &Builder) { 196 DefineTypeSize(MacroName, TI.getTypeWidth(Ty), TI.getTypeConstantSuffix(Ty), 197 TI.isTypeSigned(Ty), Builder); 198 } 199 200 static void DefineFmt(const Twine &Prefix, TargetInfo::IntType Ty, 201 const TargetInfo &TI, MacroBuilder &Builder) { 202 bool IsSigned = TI.isTypeSigned(Ty); 203 StringRef FmtModifier = TI.getTypeFormatModifier(Ty); 204 for (const char *Fmt = IsSigned ? "di" : "ouxX"; *Fmt; ++Fmt) { 205 Builder.defineMacro(Prefix + "_FMT" + Twine(*Fmt) + "__", 206 Twine("\"") + FmtModifier + Twine(*Fmt) + "\""); 207 } 208 } 209 210 static void DefineType(const Twine &MacroName, TargetInfo::IntType Ty, 211 MacroBuilder &Builder) { 212 Builder.defineMacro(MacroName, TargetInfo::getTypeName(Ty)); 213 } 214 215 static void DefineTypeWidth(StringRef MacroName, TargetInfo::IntType Ty, 216 const TargetInfo &TI, MacroBuilder &Builder) { 217 Builder.defineMacro(MacroName, Twine(TI.getTypeWidth(Ty))); 218 } 219 220 static void DefineTypeSizeof(StringRef MacroName, unsigned BitWidth, 221 const TargetInfo &TI, MacroBuilder &Builder) { 222 Builder.defineMacro(MacroName, 223 Twine(BitWidth / TI.getCharWidth())); 224 } 225 226 static void DefineExactWidthIntType(TargetInfo::IntType Ty, 227 const TargetInfo &TI, 228 MacroBuilder &Builder) { 229 int TypeWidth = TI.getTypeWidth(Ty); 230 bool IsSigned = TI.isTypeSigned(Ty); 231 232 // Use the target specified int64 type, when appropriate, so that [u]int64_t 233 // ends up being defined in terms of the correct type. 234 if (TypeWidth == 64) 235 Ty = IsSigned ? TI.getInt64Type() : TI.getUInt64Type(); 236 237 const char *Prefix = IsSigned ? "__INT" : "__UINT"; 238 239 DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder); 240 DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder); 241 242 StringRef ConstSuffix(TI.getTypeConstantSuffix(Ty)); 243 Builder.defineMacro(Prefix + Twine(TypeWidth) + "_C_SUFFIX__", ConstSuffix); 244 } 245 246 static void DefineExactWidthIntTypeSize(TargetInfo::IntType Ty, 247 const TargetInfo &TI, 248 MacroBuilder &Builder) { 249 int TypeWidth = TI.getTypeWidth(Ty); 250 bool IsSigned = TI.isTypeSigned(Ty); 251 252 // Use the target specified int64 type, when appropriate, so that [u]int64_t 253 // ends up being defined in terms of the correct type. 254 if (TypeWidth == 64) 255 Ty = IsSigned ? TI.getInt64Type() : TI.getUInt64Type(); 256 257 const char *Prefix = IsSigned ? "__INT" : "__UINT"; 258 DefineTypeSize(Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder); 259 } 260 261 static void DefineLeastWidthIntType(unsigned TypeWidth, bool IsSigned, 262 const TargetInfo &TI, 263 MacroBuilder &Builder) { 264 TargetInfo::IntType Ty = TI.getLeastIntTypeByWidth(TypeWidth, IsSigned); 265 if (Ty == TargetInfo::NoInt) 266 return; 267 268 const char *Prefix = IsSigned ? "__INT_LEAST" : "__UINT_LEAST"; 269 DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder); 270 DefineTypeSize(Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder); 271 DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder); 272 } 273 274 static void DefineFastIntType(unsigned TypeWidth, bool IsSigned, 275 const TargetInfo &TI, MacroBuilder &Builder) { 276 // stdint.h currently defines the fast int types as equivalent to the least 277 // types. 278 TargetInfo::IntType Ty = TI.getLeastIntTypeByWidth(TypeWidth, IsSigned); 279 if (Ty == TargetInfo::NoInt) 280 return; 281 282 const char *Prefix = IsSigned ? "__INT_FAST" : "__UINT_FAST"; 283 DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder); 284 DefineTypeSize(Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder); 285 286 DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder); 287 } 288 289 290 /// Get the value the ATOMIC_*_LOCK_FREE macro should have for a type with 291 /// the specified properties. 292 static const char *getLockFreeValue(unsigned TypeWidth, unsigned TypeAlign, 293 unsigned InlineWidth) { 294 // Fully-aligned, power-of-2 sizes no larger than the inline 295 // width will be inlined as lock-free operations. 296 if (TypeWidth == TypeAlign && (TypeWidth & (TypeWidth - 1)) == 0 && 297 TypeWidth <= InlineWidth) 298 return "2"; // "always lock free" 299 // We cannot be certain what operations the lib calls might be 300 // able to implement as lock-free on future processors. 301 return "1"; // "sometimes lock free" 302 } 303 304 /// \brief Add definitions required for a smooth interaction between 305 /// Objective-C++ automated reference counting and libstdc++ (4.2). 306 static void AddObjCXXARCLibstdcxxDefines(const LangOptions &LangOpts, 307 MacroBuilder &Builder) { 308 Builder.defineMacro("_GLIBCXX_PREDEFINED_OBJC_ARC_IS_SCALAR"); 309 310 std::string Result; 311 { 312 // Provide specializations for the __is_scalar type trait so that 313 // lifetime-qualified objects are not considered "scalar" types, which 314 // libstdc++ uses as an indicator of the presence of trivial copy, assign, 315 // default-construct, and destruct semantics (none of which hold for 316 // lifetime-qualified objects in ARC). 317 llvm::raw_string_ostream Out(Result); 318 319 Out << "namespace std {\n" 320 << "\n" 321 << "struct __true_type;\n" 322 << "struct __false_type;\n" 323 << "\n"; 324 325 Out << "template<typename _Tp> struct __is_scalar;\n" 326 << "\n"; 327 328 if (LangOpts.ObjCAutoRefCount) { 329 Out << "template<typename _Tp>\n" 330 << "struct __is_scalar<__attribute__((objc_ownership(strong))) _Tp> {\n" 331 << " enum { __value = 0 };\n" 332 << " typedef __false_type __type;\n" 333 << "};\n" 334 << "\n"; 335 } 336 337 if (LangOpts.ObjCWeak) { 338 Out << "template<typename _Tp>\n" 339 << "struct __is_scalar<__attribute__((objc_ownership(weak))) _Tp> {\n" 340 << " enum { __value = 0 };\n" 341 << " typedef __false_type __type;\n" 342 << "};\n" 343 << "\n"; 344 } 345 346 if (LangOpts.ObjCAutoRefCount) { 347 Out << "template<typename _Tp>\n" 348 << "struct __is_scalar<__attribute__((objc_ownership(autoreleasing)))" 349 << " _Tp> {\n" 350 << " enum { __value = 0 };\n" 351 << " typedef __false_type __type;\n" 352 << "};\n" 353 << "\n"; 354 } 355 356 Out << "}\n"; 357 } 358 Builder.append(Result); 359 } 360 361 static void InitializeStandardPredefinedMacros(const TargetInfo &TI, 362 const LangOptions &LangOpts, 363 const FrontendOptions &FEOpts, 364 MacroBuilder &Builder) { 365 if (!LangOpts.MSVCCompat && !LangOpts.TraditionalCPP) 366 Builder.defineMacro("__STDC__"); 367 if (LangOpts.Freestanding) 368 Builder.defineMacro("__STDC_HOSTED__", "0"); 369 else 370 Builder.defineMacro("__STDC_HOSTED__"); 371 372 if (!LangOpts.CPlusPlus) { 373 if (LangOpts.C11) 374 Builder.defineMacro("__STDC_VERSION__", "201112L"); 375 else if (LangOpts.C99) 376 Builder.defineMacro("__STDC_VERSION__", "199901L"); 377 else if (!LangOpts.GNUMode && LangOpts.Digraphs) 378 Builder.defineMacro("__STDC_VERSION__", "199409L"); 379 } else { 380 // FIXME: Use correct value for C++17. 381 if (LangOpts.CPlusPlus1z) 382 Builder.defineMacro("__cplusplus", "201406L"); 383 // C++1y [cpp.predefined]p1: 384 // The name __cplusplus is defined to the value 201402L when compiling a 385 // C++ translation unit. 386 else if (LangOpts.CPlusPlus14) 387 Builder.defineMacro("__cplusplus", "201402L"); 388 // C++11 [cpp.predefined]p1: 389 // The name __cplusplus is defined to the value 201103L when compiling a 390 // C++ translation unit. 391 else if (LangOpts.CPlusPlus11) 392 Builder.defineMacro("__cplusplus", "201103L"); 393 // C++03 [cpp.predefined]p1: 394 // The name __cplusplus is defined to the value 199711L when compiling a 395 // C++ translation unit. 396 else 397 Builder.defineMacro("__cplusplus", "199711L"); 398 } 399 400 // In C11 these are environment macros. In C++11 they are only defined 401 // as part of <cuchar>. To prevent breakage when mixing C and C++ 402 // code, define these macros unconditionally. We can define them 403 // unconditionally, as Clang always uses UTF-16 and UTF-32 for 16-bit 404 // and 32-bit character literals. 405 Builder.defineMacro("__STDC_UTF_16__", "1"); 406 Builder.defineMacro("__STDC_UTF_32__", "1"); 407 408 if (LangOpts.ObjC1) 409 Builder.defineMacro("__OBJC__"); 410 411 // OpenCL v1.0/1.1 s6.9, v1.2/2.0 s6.10: Preprocessor Directives and Macros. 412 if (LangOpts.OpenCL) { 413 // OpenCL v1.0 and v1.1 do not have a predefined macro to indicate the 414 // language standard with which the program is compiled. __OPENCL_VERSION__ 415 // is for the OpenCL version supported by the OpenCL device, which is not 416 // necessarily the language standard with which the program is compiled. 417 // A shared OpenCL header file requires a macro to indicate the language 418 // standard. As a workaround, __OPENCL_C_VERSION__ is defined for 419 // OpenCL v1.0 and v1.1. 420 switch (LangOpts.OpenCLVersion) { 421 case 100: 422 Builder.defineMacro("__OPENCL_C_VERSION__", "100"); 423 break; 424 case 110: 425 Builder.defineMacro("__OPENCL_C_VERSION__", "110"); 426 break; 427 case 120: 428 Builder.defineMacro("__OPENCL_C_VERSION__", "120"); 429 break; 430 case 200: 431 Builder.defineMacro("__OPENCL_C_VERSION__", "200"); 432 break; 433 default: 434 llvm_unreachable("Unsupported OpenCL version"); 435 } 436 Builder.defineMacro("CL_VERSION_1_0", "100"); 437 Builder.defineMacro("CL_VERSION_1_1", "110"); 438 Builder.defineMacro("CL_VERSION_1_2", "120"); 439 Builder.defineMacro("CL_VERSION_2_0", "200"); 440 441 if (LangOpts.FastRelaxedMath) 442 Builder.defineMacro("__FAST_RELAXED_MATH__"); 443 } 444 // Not "standard" per se, but available even with the -undef flag. 445 if (LangOpts.AsmPreprocessor) 446 Builder.defineMacro("__ASSEMBLER__"); 447 if (LangOpts.CUDA) 448 Builder.defineMacro("__CUDA__"); 449 } 450 451 /// Initialize the predefined C++ language feature test macros defined in 452 /// ISO/IEC JTC1/SC22/WG21 (C++) SD-6: "SG10 Feature Test Recommendations". 453 static void InitializeCPlusPlusFeatureTestMacros(const LangOptions &LangOpts, 454 MacroBuilder &Builder) { 455 // C++98 features. 456 if (LangOpts.RTTI) 457 Builder.defineMacro("__cpp_rtti", "199711"); 458 if (LangOpts.CXXExceptions) 459 Builder.defineMacro("__cpp_exceptions", "199711"); 460 461 // C++11 features. 462 if (LangOpts.CPlusPlus11) { 463 Builder.defineMacro("__cpp_unicode_characters", "200704"); 464 Builder.defineMacro("__cpp_raw_strings", "200710"); 465 Builder.defineMacro("__cpp_unicode_literals", "200710"); 466 Builder.defineMacro("__cpp_user_defined_literals", "200809"); 467 Builder.defineMacro("__cpp_lambdas", "200907"); 468 Builder.defineMacro("__cpp_constexpr", 469 LangOpts.CPlusPlus14 ? "201304" : "200704"); 470 Builder.defineMacro("__cpp_range_based_for", "200907"); 471 Builder.defineMacro("__cpp_static_assert", "200410"); 472 Builder.defineMacro("__cpp_decltype", "200707"); 473 Builder.defineMacro("__cpp_attributes", "200809"); 474 Builder.defineMacro("__cpp_rvalue_references", "200610"); 475 Builder.defineMacro("__cpp_variadic_templates", "200704"); 476 Builder.defineMacro("__cpp_initializer_lists", "200806"); 477 Builder.defineMacro("__cpp_delegating_constructors", "200604"); 478 Builder.defineMacro("__cpp_nsdmi", "200809"); 479 Builder.defineMacro("__cpp_inheriting_constructors", "200802"); 480 Builder.defineMacro("__cpp_ref_qualifiers", "200710"); 481 Builder.defineMacro("__cpp_alias_templates", "200704"); 482 } 483 484 // C++14 features. 485 if (LangOpts.CPlusPlus14) { 486 Builder.defineMacro("__cpp_binary_literals", "201304"); 487 Builder.defineMacro("__cpp_digit_separators", "201309"); 488 Builder.defineMacro("__cpp_init_captures", "201304"); 489 Builder.defineMacro("__cpp_generic_lambdas", "201304"); 490 Builder.defineMacro("__cpp_decltype_auto", "201304"); 491 Builder.defineMacro("__cpp_return_type_deduction", "201304"); 492 Builder.defineMacro("__cpp_aggregate_nsdmi", "201304"); 493 Builder.defineMacro("__cpp_variable_templates", "201304"); 494 } 495 if (LangOpts.SizedDeallocation) 496 Builder.defineMacro("__cpp_sized_deallocation", "201309"); 497 if (LangOpts.ConceptsTS) 498 Builder.defineMacro("__cpp_experimental_concepts", "1"); 499 if (LangOpts.Coroutines) 500 Builder.defineMacro("__cpp_coroutines", "1"); 501 } 502 503 static void InitializePredefinedMacros(const TargetInfo &TI, 504 const LangOptions &LangOpts, 505 const FrontendOptions &FEOpts, 506 MacroBuilder &Builder) { 507 // Compiler version introspection macros. 508 Builder.defineMacro("__llvm__"); // LLVM Backend 509 Builder.defineMacro("__clang__"); // Clang Frontend 510 #define TOSTR2(X) #X 511 #define TOSTR(X) TOSTR2(X) 512 Builder.defineMacro("__clang_major__", TOSTR(CLANG_VERSION_MAJOR)); 513 Builder.defineMacro("__clang_minor__", TOSTR(CLANG_VERSION_MINOR)); 514 #ifdef CLANG_VERSION_PATCHLEVEL 515 Builder.defineMacro("__clang_patchlevel__", TOSTR(CLANG_VERSION_PATCHLEVEL)); 516 #else 517 Builder.defineMacro("__clang_patchlevel__", "0"); 518 #endif 519 Builder.defineMacro("__clang_version__", 520 "\"" CLANG_VERSION_STRING " " 521 + getClangFullRepositoryVersion() + "\""); 522 #undef TOSTR 523 #undef TOSTR2 524 if (!LangOpts.MSVCCompat) { 525 // Currently claim to be compatible with GCC 4.2.1-5621, but only if we're 526 // not compiling for MSVC compatibility 527 Builder.defineMacro("__GNUC_MINOR__", "2"); 528 Builder.defineMacro("__GNUC_PATCHLEVEL__", "1"); 529 Builder.defineMacro("__GNUC__", "4"); 530 Builder.defineMacro("__GXX_ABI_VERSION", "1002"); 531 } 532 533 // Define macros for the C11 / C++11 memory orderings 534 Builder.defineMacro("__ATOMIC_RELAXED", "0"); 535 Builder.defineMacro("__ATOMIC_CONSUME", "1"); 536 Builder.defineMacro("__ATOMIC_ACQUIRE", "2"); 537 Builder.defineMacro("__ATOMIC_RELEASE", "3"); 538 Builder.defineMacro("__ATOMIC_ACQ_REL", "4"); 539 Builder.defineMacro("__ATOMIC_SEQ_CST", "5"); 540 541 // Support for #pragma redefine_extname (Sun compatibility) 542 Builder.defineMacro("__PRAGMA_REDEFINE_EXTNAME", "1"); 543 544 // As sad as it is, enough software depends on the __VERSION__ for version 545 // checks that it is necessary to report 4.2.1 (the base GCC version we claim 546 // compatibility with) first. 547 Builder.defineMacro("__VERSION__", "\"4.2.1 Compatible " + 548 Twine(getClangFullCPPVersion()) + "\""); 549 550 // Initialize language-specific preprocessor defines. 551 552 // Standard conforming mode? 553 if (!LangOpts.GNUMode && !LangOpts.MSVCCompat) 554 Builder.defineMacro("__STRICT_ANSI__"); 555 556 if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus11) 557 Builder.defineMacro("__GXX_EXPERIMENTAL_CXX0X__"); 558 559 if (LangOpts.ObjC1) { 560 if (LangOpts.ObjCRuntime.isNonFragile()) { 561 Builder.defineMacro("__OBJC2__"); 562 563 if (LangOpts.ObjCExceptions) 564 Builder.defineMacro("OBJC_ZEROCOST_EXCEPTIONS"); 565 } 566 567 if (LangOpts.getGC() != LangOptions::NonGC) 568 Builder.defineMacro("__OBJC_GC__"); 569 570 if (LangOpts.ObjCRuntime.isNeXTFamily()) 571 Builder.defineMacro("__NEXT_RUNTIME__"); 572 573 if (LangOpts.ObjCRuntime.getKind() == ObjCRuntime::ObjFW) { 574 VersionTuple tuple = LangOpts.ObjCRuntime.getVersion(); 575 576 unsigned minor = 0; 577 if (tuple.getMinor().hasValue()) 578 minor = tuple.getMinor().getValue(); 579 580 unsigned subminor = 0; 581 if (tuple.getSubminor().hasValue()) 582 subminor = tuple.getSubminor().getValue(); 583 584 Builder.defineMacro("__OBJFW_RUNTIME_ABI__", 585 Twine(tuple.getMajor() * 10000 + minor * 100 + 586 subminor)); 587 } 588 589 Builder.defineMacro("IBOutlet", "__attribute__((iboutlet))"); 590 Builder.defineMacro("IBOutletCollection(ClassName)", 591 "__attribute__((iboutletcollection(ClassName)))"); 592 Builder.defineMacro("IBAction", "void)__attribute__((ibaction)"); 593 Builder.defineMacro("IBInspectable", ""); 594 Builder.defineMacro("IB_DESIGNABLE", ""); 595 } 596 597 if (LangOpts.CPlusPlus) 598 InitializeCPlusPlusFeatureTestMacros(LangOpts, Builder); 599 600 // darwin_constant_cfstrings controls this. This is also dependent 601 // on other things like the runtime I believe. This is set even for C code. 602 if (!LangOpts.NoConstantCFStrings) 603 Builder.defineMacro("__CONSTANT_CFSTRINGS__"); 604 605 if (LangOpts.ObjC2) 606 Builder.defineMacro("OBJC_NEW_PROPERTIES"); 607 608 if (LangOpts.PascalStrings) 609 Builder.defineMacro("__PASCAL_STRINGS__"); 610 611 if (LangOpts.Blocks) { 612 Builder.defineMacro("__block", "__attribute__((__blocks__(byref)))"); 613 Builder.defineMacro("__BLOCKS__"); 614 } 615 616 if (!LangOpts.MSVCCompat && LangOpts.Exceptions) 617 Builder.defineMacro("__EXCEPTIONS"); 618 if (!LangOpts.MSVCCompat && LangOpts.RTTI) 619 Builder.defineMacro("__GXX_RTTI"); 620 if (LangOpts.SjLjExceptions) 621 Builder.defineMacro("__USING_SJLJ_EXCEPTIONS__"); 622 623 if (LangOpts.Deprecated) 624 Builder.defineMacro("__DEPRECATED"); 625 626 if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus) { 627 Builder.defineMacro("__GNUG__", "4"); 628 Builder.defineMacro("__GXX_WEAK__"); 629 Builder.defineMacro("__private_extern__", "extern"); 630 } 631 632 if (LangOpts.MicrosoftExt) { 633 if (LangOpts.WChar) { 634 // wchar_t supported as a keyword. 635 Builder.defineMacro("_WCHAR_T_DEFINED"); 636 Builder.defineMacro("_NATIVE_WCHAR_T_DEFINED"); 637 } 638 } 639 640 if (LangOpts.Optimize) 641 Builder.defineMacro("__OPTIMIZE__"); 642 if (LangOpts.OptimizeSize) 643 Builder.defineMacro("__OPTIMIZE_SIZE__"); 644 645 if (LangOpts.FastMath) 646 Builder.defineMacro("__FAST_MATH__"); 647 648 // Initialize target-specific preprocessor defines. 649 650 // __BYTE_ORDER__ was added in GCC 4.6. It's analogous 651 // to the macro __BYTE_ORDER (no trailing underscores) 652 // from glibc's <endian.h> header. 653 // We don't support the PDP-11 as a target, but include 654 // the define so it can still be compared against. 655 Builder.defineMacro("__ORDER_LITTLE_ENDIAN__", "1234"); 656 Builder.defineMacro("__ORDER_BIG_ENDIAN__", "4321"); 657 Builder.defineMacro("__ORDER_PDP_ENDIAN__", "3412"); 658 if (TI.isBigEndian()) { 659 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_BIG_ENDIAN__"); 660 Builder.defineMacro("__BIG_ENDIAN__"); 661 } else { 662 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_LITTLE_ENDIAN__"); 663 Builder.defineMacro("__LITTLE_ENDIAN__"); 664 } 665 666 if (TI.getPointerWidth(0) == 64 && TI.getLongWidth() == 64 667 && TI.getIntWidth() == 32) { 668 Builder.defineMacro("_LP64"); 669 Builder.defineMacro("__LP64__"); 670 } 671 672 if (TI.getPointerWidth(0) == 32 && TI.getLongWidth() == 32 673 && TI.getIntWidth() == 32) { 674 Builder.defineMacro("_ILP32"); 675 Builder.defineMacro("__ILP32__"); 676 } 677 678 // Define type sizing macros based on the target properties. 679 assert(TI.getCharWidth() == 8 && "Only support 8-bit char so far"); 680 Builder.defineMacro("__CHAR_BIT__", "8"); 681 682 DefineTypeSize("__SCHAR_MAX__", TargetInfo::SignedChar, TI, Builder); 683 DefineTypeSize("__SHRT_MAX__", TargetInfo::SignedShort, TI, Builder); 684 DefineTypeSize("__INT_MAX__", TargetInfo::SignedInt, TI, Builder); 685 DefineTypeSize("__LONG_MAX__", TargetInfo::SignedLong, TI, Builder); 686 DefineTypeSize("__LONG_LONG_MAX__", TargetInfo::SignedLongLong, TI, Builder); 687 DefineTypeSize("__WCHAR_MAX__", TI.getWCharType(), TI, Builder); 688 DefineTypeSize("__INTMAX_MAX__", TI.getIntMaxType(), TI, Builder); 689 DefineTypeSize("__SIZE_MAX__", TI.getSizeType(), TI, Builder); 690 691 DefineTypeSize("__UINTMAX_MAX__", TI.getUIntMaxType(), TI, Builder); 692 DefineTypeSize("__PTRDIFF_MAX__", TI.getPtrDiffType(0), TI, Builder); 693 DefineTypeSize("__INTPTR_MAX__", TI.getIntPtrType(), TI, Builder); 694 DefineTypeSize("__UINTPTR_MAX__", TI.getUIntPtrType(), TI, Builder); 695 696 DefineTypeSizeof("__SIZEOF_DOUBLE__", TI.getDoubleWidth(), TI, Builder); 697 DefineTypeSizeof("__SIZEOF_FLOAT__", TI.getFloatWidth(), TI, Builder); 698 DefineTypeSizeof("__SIZEOF_INT__", TI.getIntWidth(), TI, Builder); 699 DefineTypeSizeof("__SIZEOF_LONG__", TI.getLongWidth(), TI, Builder); 700 DefineTypeSizeof("__SIZEOF_LONG_DOUBLE__",TI.getLongDoubleWidth(),TI,Builder); 701 DefineTypeSizeof("__SIZEOF_LONG_LONG__", TI.getLongLongWidth(), TI, Builder); 702 DefineTypeSizeof("__SIZEOF_POINTER__", TI.getPointerWidth(0), TI, Builder); 703 DefineTypeSizeof("__SIZEOF_SHORT__", TI.getShortWidth(), TI, Builder); 704 DefineTypeSizeof("__SIZEOF_PTRDIFF_T__", 705 TI.getTypeWidth(TI.getPtrDiffType(0)), TI, Builder); 706 DefineTypeSizeof("__SIZEOF_SIZE_T__", 707 TI.getTypeWidth(TI.getSizeType()), TI, Builder); 708 DefineTypeSizeof("__SIZEOF_WCHAR_T__", 709 TI.getTypeWidth(TI.getWCharType()), TI, Builder); 710 DefineTypeSizeof("__SIZEOF_WINT_T__", 711 TI.getTypeWidth(TI.getWIntType()), TI, Builder); 712 if (TI.hasInt128Type()) 713 DefineTypeSizeof("__SIZEOF_INT128__", 128, TI, Builder); 714 715 DefineType("__INTMAX_TYPE__", TI.getIntMaxType(), Builder); 716 DefineFmt("__INTMAX", TI.getIntMaxType(), TI, Builder); 717 Builder.defineMacro("__INTMAX_C_SUFFIX__", 718 TI.getTypeConstantSuffix(TI.getIntMaxType())); 719 DefineType("__UINTMAX_TYPE__", TI.getUIntMaxType(), Builder); 720 DefineFmt("__UINTMAX", TI.getUIntMaxType(), TI, Builder); 721 Builder.defineMacro("__UINTMAX_C_SUFFIX__", 722 TI.getTypeConstantSuffix(TI.getUIntMaxType())); 723 DefineTypeWidth("__INTMAX_WIDTH__", TI.getIntMaxType(), TI, Builder); 724 DefineType("__PTRDIFF_TYPE__", TI.getPtrDiffType(0), Builder); 725 DefineFmt("__PTRDIFF", TI.getPtrDiffType(0), TI, Builder); 726 DefineTypeWidth("__PTRDIFF_WIDTH__", TI.getPtrDiffType(0), TI, Builder); 727 DefineType("__INTPTR_TYPE__", TI.getIntPtrType(), Builder); 728 DefineFmt("__INTPTR", TI.getIntPtrType(), TI, Builder); 729 DefineTypeWidth("__INTPTR_WIDTH__", TI.getIntPtrType(), TI, Builder); 730 DefineType("__SIZE_TYPE__", TI.getSizeType(), Builder); 731 DefineFmt("__SIZE", TI.getSizeType(), TI, Builder); 732 DefineTypeWidth("__SIZE_WIDTH__", TI.getSizeType(), TI, Builder); 733 DefineType("__WCHAR_TYPE__", TI.getWCharType(), Builder); 734 DefineTypeWidth("__WCHAR_WIDTH__", TI.getWCharType(), TI, Builder); 735 DefineType("__WINT_TYPE__", TI.getWIntType(), Builder); 736 DefineTypeWidth("__WINT_WIDTH__", TI.getWIntType(), TI, Builder); 737 DefineTypeWidth("__SIG_ATOMIC_WIDTH__", TI.getSigAtomicType(), TI, Builder); 738 DefineTypeSize("__SIG_ATOMIC_MAX__", TI.getSigAtomicType(), TI, Builder); 739 DefineType("__CHAR16_TYPE__", TI.getChar16Type(), Builder); 740 DefineType("__CHAR32_TYPE__", TI.getChar32Type(), Builder); 741 742 DefineTypeWidth("__UINTMAX_WIDTH__", TI.getUIntMaxType(), TI, Builder); 743 DefineType("__UINTPTR_TYPE__", TI.getUIntPtrType(), Builder); 744 DefineFmt("__UINTPTR", TI.getUIntPtrType(), TI, Builder); 745 DefineTypeWidth("__UINTPTR_WIDTH__", TI.getUIntPtrType(), TI, Builder); 746 747 DefineFloatMacros(Builder, "FLT", &TI.getFloatFormat(), "F"); 748 DefineFloatMacros(Builder, "DBL", &TI.getDoubleFormat(), ""); 749 DefineFloatMacros(Builder, "LDBL", &TI.getLongDoubleFormat(), "L"); 750 751 // Define a __POINTER_WIDTH__ macro for stdint.h. 752 Builder.defineMacro("__POINTER_WIDTH__", 753 Twine((int)TI.getPointerWidth(0))); 754 755 // Define __BIGGEST_ALIGNMENT__ to be compatible with gcc. 756 Builder.defineMacro("__BIGGEST_ALIGNMENT__", 757 Twine(TI.getSuitableAlign() / TI.getCharWidth()) ); 758 759 if (!LangOpts.CharIsSigned) 760 Builder.defineMacro("__CHAR_UNSIGNED__"); 761 762 if (!TargetInfo::isTypeSigned(TI.getWCharType())) 763 Builder.defineMacro("__WCHAR_UNSIGNED__"); 764 765 if (!TargetInfo::isTypeSigned(TI.getWIntType())) 766 Builder.defineMacro("__WINT_UNSIGNED__"); 767 768 // Define exact-width integer types for stdint.h 769 DefineExactWidthIntType(TargetInfo::SignedChar, TI, Builder); 770 771 if (TI.getShortWidth() > TI.getCharWidth()) 772 DefineExactWidthIntType(TargetInfo::SignedShort, TI, Builder); 773 774 if (TI.getIntWidth() > TI.getShortWidth()) 775 DefineExactWidthIntType(TargetInfo::SignedInt, TI, Builder); 776 777 if (TI.getLongWidth() > TI.getIntWidth()) 778 DefineExactWidthIntType(TargetInfo::SignedLong, TI, Builder); 779 780 if (TI.getLongLongWidth() > TI.getLongWidth()) 781 DefineExactWidthIntType(TargetInfo::SignedLongLong, TI, Builder); 782 783 DefineExactWidthIntType(TargetInfo::UnsignedChar, TI, Builder); 784 DefineExactWidthIntTypeSize(TargetInfo::UnsignedChar, TI, Builder); 785 DefineExactWidthIntTypeSize(TargetInfo::SignedChar, TI, Builder); 786 787 if (TI.getShortWidth() > TI.getCharWidth()) { 788 DefineExactWidthIntType(TargetInfo::UnsignedShort, TI, Builder); 789 DefineExactWidthIntTypeSize(TargetInfo::UnsignedShort, TI, Builder); 790 DefineExactWidthIntTypeSize(TargetInfo::SignedShort, TI, Builder); 791 } 792 793 if (TI.getIntWidth() > TI.getShortWidth()) { 794 DefineExactWidthIntType(TargetInfo::UnsignedInt, TI, Builder); 795 DefineExactWidthIntTypeSize(TargetInfo::UnsignedInt, TI, Builder); 796 DefineExactWidthIntTypeSize(TargetInfo::SignedInt, TI, Builder); 797 } 798 799 if (TI.getLongWidth() > TI.getIntWidth()) { 800 DefineExactWidthIntType(TargetInfo::UnsignedLong, TI, Builder); 801 DefineExactWidthIntTypeSize(TargetInfo::UnsignedLong, TI, Builder); 802 DefineExactWidthIntTypeSize(TargetInfo::SignedLong, TI, Builder); 803 } 804 805 if (TI.getLongLongWidth() > TI.getLongWidth()) { 806 DefineExactWidthIntType(TargetInfo::UnsignedLongLong, TI, Builder); 807 DefineExactWidthIntTypeSize(TargetInfo::UnsignedLongLong, TI, Builder); 808 DefineExactWidthIntTypeSize(TargetInfo::SignedLongLong, TI, Builder); 809 } 810 811 DefineLeastWidthIntType(8, true, TI, Builder); 812 DefineLeastWidthIntType(8, false, TI, Builder); 813 DefineLeastWidthIntType(16, true, TI, Builder); 814 DefineLeastWidthIntType(16, false, TI, Builder); 815 DefineLeastWidthIntType(32, true, TI, Builder); 816 DefineLeastWidthIntType(32, false, TI, Builder); 817 DefineLeastWidthIntType(64, true, TI, Builder); 818 DefineLeastWidthIntType(64, false, TI, Builder); 819 820 DefineFastIntType(8, true, TI, Builder); 821 DefineFastIntType(8, false, TI, Builder); 822 DefineFastIntType(16, true, TI, Builder); 823 DefineFastIntType(16, false, TI, Builder); 824 DefineFastIntType(32, true, TI, Builder); 825 DefineFastIntType(32, false, TI, Builder); 826 DefineFastIntType(64, true, TI, Builder); 827 DefineFastIntType(64, false, TI, Builder); 828 829 char UserLabelPrefix[2] = {TI.getDataLayout().getGlobalPrefix(), 0}; 830 Builder.defineMacro("__USER_LABEL_PREFIX__", UserLabelPrefix); 831 832 if (LangOpts.FastMath || LangOpts.FiniteMathOnly) 833 Builder.defineMacro("__FINITE_MATH_ONLY__", "1"); 834 else 835 Builder.defineMacro("__FINITE_MATH_ONLY__", "0"); 836 837 if (!LangOpts.MSVCCompat) { 838 if (LangOpts.GNUInline || LangOpts.CPlusPlus) 839 Builder.defineMacro("__GNUC_GNU_INLINE__"); 840 else 841 Builder.defineMacro("__GNUC_STDC_INLINE__"); 842 843 // The value written by __atomic_test_and_set. 844 // FIXME: This is target-dependent. 845 Builder.defineMacro("__GCC_ATOMIC_TEST_AND_SET_TRUEVAL", "1"); 846 847 // Used by libc++ and libstdc++ to implement ATOMIC_<foo>_LOCK_FREE. 848 unsigned InlineWidthBits = TI.getMaxAtomicInlineWidth(); 849 #define DEFINE_LOCK_FREE_MACRO(TYPE, Type) \ 850 Builder.defineMacro("__GCC_ATOMIC_" #TYPE "_LOCK_FREE", \ 851 getLockFreeValue(TI.get##Type##Width(), \ 852 TI.get##Type##Align(), \ 853 InlineWidthBits)); 854 DEFINE_LOCK_FREE_MACRO(BOOL, Bool); 855 DEFINE_LOCK_FREE_MACRO(CHAR, Char); 856 DEFINE_LOCK_FREE_MACRO(CHAR16_T, Char16); 857 DEFINE_LOCK_FREE_MACRO(CHAR32_T, Char32); 858 DEFINE_LOCK_FREE_MACRO(WCHAR_T, WChar); 859 DEFINE_LOCK_FREE_MACRO(SHORT, Short); 860 DEFINE_LOCK_FREE_MACRO(INT, Int); 861 DEFINE_LOCK_FREE_MACRO(LONG, Long); 862 DEFINE_LOCK_FREE_MACRO(LLONG, LongLong); 863 Builder.defineMacro("__GCC_ATOMIC_POINTER_LOCK_FREE", 864 getLockFreeValue(TI.getPointerWidth(0), 865 TI.getPointerAlign(0), 866 InlineWidthBits)); 867 #undef DEFINE_LOCK_FREE_MACRO 868 } 869 870 if (LangOpts.NoInlineDefine) 871 Builder.defineMacro("__NO_INLINE__"); 872 873 if (unsigned PICLevel = LangOpts.PICLevel) { 874 Builder.defineMacro("__PIC__", Twine(PICLevel)); 875 Builder.defineMacro("__pic__", Twine(PICLevel)); 876 if (LangOpts.PIE) { 877 Builder.defineMacro("__PIE__", Twine(PICLevel)); 878 Builder.defineMacro("__pie__", Twine(PICLevel)); 879 } 880 } 881 882 // Macros to control C99 numerics and <float.h> 883 Builder.defineMacro("__FLT_EVAL_METHOD__", Twine(TI.getFloatEvalMethod())); 884 Builder.defineMacro("__FLT_RADIX__", "2"); 885 Builder.defineMacro("__DECIMAL_DIG__", "__LDBL_DECIMAL_DIG__"); 886 887 if (LangOpts.getStackProtector() == LangOptions::SSPOn) 888 Builder.defineMacro("__SSP__"); 889 else if (LangOpts.getStackProtector() == LangOptions::SSPStrong) 890 Builder.defineMacro("__SSP_STRONG__", "2"); 891 else if (LangOpts.getStackProtector() == LangOptions::SSPReq) 892 Builder.defineMacro("__SSP_ALL__", "3"); 893 894 // Define a macro that exists only when using the static analyzer. 895 if (FEOpts.ProgramAction == frontend::RunAnalysis) 896 Builder.defineMacro("__clang_analyzer__"); 897 898 if (LangOpts.FastRelaxedMath) 899 Builder.defineMacro("__FAST_RELAXED_MATH__"); 900 901 if (FEOpts.ProgramAction == frontend::RewriteObjC || 902 LangOpts.getGC() != LangOptions::NonGC) { 903 Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))"); 904 Builder.defineMacro("__strong", "__attribute__((objc_gc(strong)))"); 905 Builder.defineMacro("__autoreleasing", ""); 906 Builder.defineMacro("__unsafe_unretained", ""); 907 } else if (LangOpts.ObjC1) { 908 Builder.defineMacro("__weak", "__attribute__((objc_ownership(weak)))"); 909 Builder.defineMacro("__strong", "__attribute__((objc_ownership(strong)))"); 910 Builder.defineMacro("__autoreleasing", 911 "__attribute__((objc_ownership(autoreleasing)))"); 912 Builder.defineMacro("__unsafe_unretained", 913 "__attribute__((objc_ownership(none)))"); 914 } 915 916 // On Darwin, there are __double_underscored variants of the type 917 // nullability qualifiers. 918 if (TI.getTriple().isOSDarwin()) { 919 Builder.defineMacro("__nonnull", "_Nonnull"); 920 Builder.defineMacro("__null_unspecified", "_Null_unspecified"); 921 Builder.defineMacro("__nullable", "_Nullable"); 922 } 923 924 // OpenMP definition 925 // OpenMP 2.2: 926 // In implementations that support a preprocessor, the _OPENMP 927 // macro name is defined to have the decimal value yyyymm where 928 // yyyy and mm are the year and the month designations of the 929 // version of the OpenMP API that the implementation support. 930 switch (LangOpts.OpenMP) { 931 case 0: 932 break; 933 case 40: 934 Builder.defineMacro("_OPENMP", "201307"); 935 break; 936 case 45: 937 Builder.defineMacro("_OPENMP", "201511"); 938 break; 939 default: 940 // Default version is OpenMP 3.1 941 Builder.defineMacro("_OPENMP", "201107"); 942 break; 943 } 944 945 // CUDA device path compilaton 946 if (LangOpts.CUDAIsDevice) { 947 // The CUDA_ARCH value is set for the GPU target specified in the NVPTX 948 // backend's target defines. 949 Builder.defineMacro("__CUDA_ARCH__"); 950 } 951 952 // We need to communicate this to our CUDA header wrapper, which in turn 953 // informs the proper CUDA headers of this choice. 954 if (LangOpts.CUDADeviceApproxTranscendentals || LangOpts.FastMath) { 955 Builder.defineMacro("__CLANG_CUDA_APPROX_TRANSCENDENTALS__"); 956 } 957 958 // OpenCL definitions. 959 if (LangOpts.OpenCL) { 960 #define OPENCLEXT(Ext) \ 961 if (TI.getSupportedOpenCLOpts().is_##Ext##_supported( \ 962 LangOpts.OpenCLVersion)) \ 963 Builder.defineMacro(#Ext); 964 #include "clang/Basic/OpenCLExtensions.def" 965 } 966 967 // Get other target #defines. 968 TI.getTargetDefines(LangOpts, Builder); 969 } 970 971 /// InitializePreprocessor - Initialize the preprocessor getting it and the 972 /// environment ready to process a single file. This returns true on error. 973 /// 974 void clang::InitializePreprocessor( 975 Preprocessor &PP, const PreprocessorOptions &InitOpts, 976 const PCHContainerReader &PCHContainerRdr, 977 const FrontendOptions &FEOpts) { 978 const LangOptions &LangOpts = PP.getLangOpts(); 979 std::string PredefineBuffer; 980 PredefineBuffer.reserve(4080); 981 llvm::raw_string_ostream Predefines(PredefineBuffer); 982 MacroBuilder Builder(Predefines); 983 984 // Emit line markers for various builtin sections of the file. We don't do 985 // this in asm preprocessor mode, because "# 4" is not a line marker directive 986 // in this mode. 987 if (!PP.getLangOpts().AsmPreprocessor) 988 Builder.append("# 1 \"<built-in>\" 3"); 989 990 // Install things like __POWERPC__, __GNUC__, etc into the macro table. 991 if (InitOpts.UsePredefines) { 992 if (LangOpts.CUDA && PP.getAuxTargetInfo()) 993 InitializePredefinedMacros(*PP.getAuxTargetInfo(), LangOpts, FEOpts, 994 Builder); 995 996 InitializePredefinedMacros(PP.getTargetInfo(), LangOpts, FEOpts, Builder); 997 998 // Install definitions to make Objective-C++ ARC work well with various 999 // C++ Standard Library implementations. 1000 if (LangOpts.ObjC1 && LangOpts.CPlusPlus && 1001 (LangOpts.ObjCAutoRefCount || LangOpts.ObjCWeak)) { 1002 switch (InitOpts.ObjCXXARCStandardLibrary) { 1003 case ARCXX_nolib: 1004 case ARCXX_libcxx: 1005 break; 1006 1007 case ARCXX_libstdcxx: 1008 AddObjCXXARCLibstdcxxDefines(LangOpts, Builder); 1009 break; 1010 } 1011 } 1012 } 1013 1014 // Even with predefines off, some macros are still predefined. 1015 // These should all be defined in the preprocessor according to the 1016 // current language configuration. 1017 InitializeStandardPredefinedMacros(PP.getTargetInfo(), PP.getLangOpts(), 1018 FEOpts, Builder); 1019 1020 // Add on the predefines from the driver. Wrap in a #line directive to report 1021 // that they come from the command line. 1022 if (!PP.getLangOpts().AsmPreprocessor) 1023 Builder.append("# 1 \"<command line>\" 1"); 1024 1025 // Process #define's and #undef's in the order they are given. 1026 for (unsigned i = 0, e = InitOpts.Macros.size(); i != e; ++i) { 1027 if (InitOpts.Macros[i].second) // isUndef 1028 Builder.undefineMacro(InitOpts.Macros[i].first); 1029 else 1030 DefineBuiltinMacro(Builder, InitOpts.Macros[i].first, 1031 PP.getDiagnostics()); 1032 } 1033 1034 // Exit the command line and go back to <built-in> (2 is LC_LEAVE). 1035 if (!PP.getLangOpts().AsmPreprocessor) 1036 Builder.append("# 1 \"<built-in>\" 2"); 1037 1038 // If -imacros are specified, include them now. These are processed before 1039 // any -include directives. 1040 for (unsigned i = 0, e = InitOpts.MacroIncludes.size(); i != e; ++i) 1041 AddImplicitIncludeMacros(Builder, InitOpts.MacroIncludes[i]); 1042 1043 // Process -include-pch/-include-pth directives. 1044 if (!InitOpts.ImplicitPCHInclude.empty()) 1045 AddImplicitIncludePCH(Builder, PP, PCHContainerRdr, 1046 InitOpts.ImplicitPCHInclude); 1047 if (!InitOpts.ImplicitPTHInclude.empty()) 1048 AddImplicitIncludePTH(Builder, PP, InitOpts.ImplicitPTHInclude); 1049 1050 // Process -include directives. 1051 for (unsigned i = 0, e = InitOpts.Includes.size(); i != e; ++i) { 1052 const std::string &Path = InitOpts.Includes[i]; 1053 AddImplicitInclude(Builder, Path); 1054 } 1055 1056 // Instruct the preprocessor to skip the preamble. 1057 PP.setSkipMainFilePreamble(InitOpts.PrecompiledPreambleBytes.first, 1058 InitOpts.PrecompiledPreambleBytes.second); 1059 1060 // Copy PredefinedBuffer into the Preprocessor. 1061 PP.setPredefines(Predefines.str()); 1062 } 1063
