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 InlineWidth) { 290 // Fully-aligned, power-of-2 sizes no larger than the inline 291 // width will be inlined as lock-free operations. 292 // Note: we do not need to check alignment since _Atomic(T) is always 293 // appropriately-aligned in clang. 294 if ((TypeWidth & (TypeWidth - 1)) == 0 && 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 // FIXME: Use correct value for C++17. 378 if (LangOpts.CPlusPlus1z) 379 Builder.defineMacro("__cplusplus", "201406L"); 380 // C++1y [cpp.predefined]p1: 381 // The name __cplusplus is defined to the value 201402L when compiling a 382 // C++ translation unit. 383 else if (LangOpts.CPlusPlus14) 384 Builder.defineMacro("__cplusplus", "201402L"); 385 // C++11 [cpp.predefined]p1: 386 // The name __cplusplus is defined to the value 201103L when compiling a 387 // C++ translation unit. 388 else if (LangOpts.CPlusPlus11) 389 Builder.defineMacro("__cplusplus", "201103L"); 390 // C++03 [cpp.predefined]p1: 391 // The name __cplusplus is defined to the value 199711L when compiling a 392 // C++ translation unit. 393 else 394 Builder.defineMacro("__cplusplus", "199711L"); 395 396 // C++1z [cpp.predefined]p1: 397 // An integer literal of type std::size_t whose value is the alignment 398 // guaranteed by a call to operator new(std::size_t) 399 // 400 // We provide this in all language modes, since it seems generally useful. 401 Builder.defineMacro("__STDCPP_DEFAULT_NEW_ALIGNMENT__", 402 Twine(TI.getNewAlign() / TI.getCharWidth()) + 403 TI.getTypeConstantSuffix(TI.getSizeType())); 404 } 405 406 // In C11 these are environment macros. In C++11 they are only defined 407 // as part of <cuchar>. To prevent breakage when mixing C and C++ 408 // code, define these macros unconditionally. We can define them 409 // unconditionally, as Clang always uses UTF-16 and UTF-32 for 16-bit 410 // and 32-bit character literals. 411 Builder.defineMacro("__STDC_UTF_16__", "1"); 412 Builder.defineMacro("__STDC_UTF_32__", "1"); 413 414 if (LangOpts.ObjC1) 415 Builder.defineMacro("__OBJC__"); 416 417 // OpenCL v1.0/1.1 s6.9, v1.2/2.0 s6.10: Preprocessor Directives and Macros. 418 if (LangOpts.OpenCL) { 419 // OpenCL v1.0 and v1.1 do not have a predefined macro to indicate the 420 // language standard with which the program is compiled. __OPENCL_VERSION__ 421 // is for the OpenCL version supported by the OpenCL device, which is not 422 // necessarily the language standard with which the program is compiled. 423 // A shared OpenCL header file requires a macro to indicate the language 424 // standard. As a workaround, __OPENCL_C_VERSION__ is defined for 425 // OpenCL v1.0 and v1.1. 426 switch (LangOpts.OpenCLVersion) { 427 case 100: 428 Builder.defineMacro("__OPENCL_C_VERSION__", "100"); 429 break; 430 case 110: 431 Builder.defineMacro("__OPENCL_C_VERSION__", "110"); 432 break; 433 case 120: 434 Builder.defineMacro("__OPENCL_C_VERSION__", "120"); 435 break; 436 case 200: 437 Builder.defineMacro("__OPENCL_C_VERSION__", "200"); 438 break; 439 default: 440 llvm_unreachable("Unsupported OpenCL version"); 441 } 442 Builder.defineMacro("CL_VERSION_1_0", "100"); 443 Builder.defineMacro("CL_VERSION_1_1", "110"); 444 Builder.defineMacro("CL_VERSION_1_2", "120"); 445 Builder.defineMacro("CL_VERSION_2_0", "200"); 446 447 if (TI.isLittleEndian()) 448 Builder.defineMacro("__ENDIAN_LITTLE__"); 449 450 if (LangOpts.FastRelaxedMath) 451 Builder.defineMacro("__FAST_RELAXED_MATH__"); 452 } 453 // Not "standard" per se, but available even with the -undef flag. 454 if (LangOpts.AsmPreprocessor) 455 Builder.defineMacro("__ASSEMBLER__"); 456 if (LangOpts.CUDA) 457 Builder.defineMacro("__CUDA__"); 458 } 459 460 /// Initialize the predefined C++ language feature test macros defined in 461 /// ISO/IEC JTC1/SC22/WG21 (C++) SD-6: "SG10 Feature Test Recommendations". 462 static void InitializeCPlusPlusFeatureTestMacros(const LangOptions &LangOpts, 463 MacroBuilder &Builder) { 464 // C++98 features. 465 if (LangOpts.RTTI) 466 Builder.defineMacro("__cpp_rtti", "199711"); 467 if (LangOpts.CXXExceptions) 468 Builder.defineMacro("__cpp_exceptions", "199711"); 469 470 // C++11 features. 471 if (LangOpts.CPlusPlus11) { 472 Builder.defineMacro("__cpp_unicode_characters", "200704"); 473 Builder.defineMacro("__cpp_raw_strings", "200710"); 474 Builder.defineMacro("__cpp_unicode_literals", "200710"); 475 Builder.defineMacro("__cpp_user_defined_literals", "200809"); 476 Builder.defineMacro("__cpp_lambdas", "200907"); 477 Builder.defineMacro("__cpp_constexpr", 478 LangOpts.CPlusPlus1z ? "201603" : 479 LangOpts.CPlusPlus14 ? "201304" : "200704"); 480 Builder.defineMacro("__cpp_range_based_for", 481 LangOpts.CPlusPlus1z ? "201603" : "200907"); 482 Builder.defineMacro("__cpp_static_assert", 483 LangOpts.CPlusPlus1z ? "201411" : "200410"); 484 Builder.defineMacro("__cpp_decltype", "200707"); 485 Builder.defineMacro("__cpp_attributes", "200809"); 486 Builder.defineMacro("__cpp_rvalue_references", "200610"); 487 Builder.defineMacro("__cpp_variadic_templates", "200704"); 488 Builder.defineMacro("__cpp_initializer_lists", "200806"); 489 Builder.defineMacro("__cpp_delegating_constructors", "200604"); 490 Builder.defineMacro("__cpp_nsdmi", "200809"); 491 Builder.defineMacro("__cpp_inheriting_constructors", "201511"); 492 Builder.defineMacro("__cpp_ref_qualifiers", "200710"); 493 Builder.defineMacro("__cpp_alias_templates", "200704"); 494 } 495 496 // C++14 features. 497 if (LangOpts.CPlusPlus14) { 498 Builder.defineMacro("__cpp_binary_literals", "201304"); 499 Builder.defineMacro("__cpp_digit_separators", "201309"); 500 Builder.defineMacro("__cpp_init_captures", "201304"); 501 Builder.defineMacro("__cpp_generic_lambdas", "201304"); 502 Builder.defineMacro("__cpp_decltype_auto", "201304"); 503 Builder.defineMacro("__cpp_return_type_deduction", "201304"); 504 Builder.defineMacro("__cpp_aggregate_nsdmi", "201304"); 505 Builder.defineMacro("__cpp_variable_templates", "201304"); 506 } 507 if (LangOpts.SizedDeallocation) 508 Builder.defineMacro("__cpp_sized_deallocation", "201309"); 509 510 // C++17 features. 511 if (LangOpts.CPlusPlus1z) { 512 Builder.defineMacro("__cpp_hex_float", "201603"); 513 Builder.defineMacro("__cpp_inline_variables", "201606"); 514 Builder.defineMacro("__cpp_noexcept_function_type", "201510"); 515 Builder.defineMacro("__cpp_capture_star_this", "201603"); 516 Builder.defineMacro("__cpp_if_constexpr", "201606"); 517 Builder.defineMacro("__cpp_template_auto", "201606"); 518 Builder.defineMacro("__cpp_namespace_attributes", "201411"); 519 Builder.defineMacro("__cpp_enumerator_attributes", "201411"); 520 Builder.defineMacro("__cpp_nested_namespace_definitions", "201411"); 521 Builder.defineMacro("__cpp_variadic_using", "201611"); 522 Builder.defineMacro("__cpp_aggregate_bases", "201603"); 523 Builder.defineMacro("__cpp_structured_bindings", "201606"); 524 Builder.defineMacro("__cpp_nontype_template_args", "201411"); 525 Builder.defineMacro("__cpp_fold_expressions", "201603"); 526 // FIXME: This is not yet listed in SD-6. 527 Builder.defineMacro("__cpp_deduction_guides", "201611"); 528 } 529 if (LangOpts.AlignedAllocation) 530 Builder.defineMacro("__cpp_aligned_new", "201606"); 531 532 // TS features. 533 if (LangOpts.ConceptsTS) 534 Builder.defineMacro("__cpp_experimental_concepts", "1"); 535 if (LangOpts.CoroutinesTS) 536 Builder.defineMacro("__cpp_coroutines", "1"); 537 } 538 539 static void InitializePredefinedMacros(const TargetInfo &TI, 540 const LangOptions &LangOpts, 541 const FrontendOptions &FEOpts, 542 MacroBuilder &Builder) { 543 // Compiler version introspection macros. 544 Builder.defineMacro("__llvm__"); // LLVM Backend 545 Builder.defineMacro("__clang__"); // Clang Frontend 546 #define TOSTR2(X) #X 547 #define TOSTR(X) TOSTR2(X) 548 Builder.defineMacro("__clang_major__", TOSTR(CLANG_VERSION_MAJOR)); 549 Builder.defineMacro("__clang_minor__", TOSTR(CLANG_VERSION_MINOR)); 550 Builder.defineMacro("__clang_patchlevel__", TOSTR(CLANG_VERSION_PATCHLEVEL)); 551 #undef TOSTR 552 #undef TOSTR2 553 Builder.defineMacro("__clang_version__", 554 "\"" CLANG_VERSION_STRING " " 555 + getClangFullRepositoryVersion() + "\""); 556 if (!LangOpts.MSVCCompat) { 557 // Currently claim to be compatible with GCC 4.2.1-5621, but only if we're 558 // not compiling for MSVC compatibility 559 Builder.defineMacro("__GNUC_MINOR__", "2"); 560 Builder.defineMacro("__GNUC_PATCHLEVEL__", "1"); 561 Builder.defineMacro("__GNUC__", "4"); 562 Builder.defineMacro("__GXX_ABI_VERSION", "1002"); 563 } 564 565 // Define macros for the C11 / C++11 memory orderings 566 Builder.defineMacro("__ATOMIC_RELAXED", "0"); 567 Builder.defineMacro("__ATOMIC_CONSUME", "1"); 568 Builder.defineMacro("__ATOMIC_ACQUIRE", "2"); 569 Builder.defineMacro("__ATOMIC_RELEASE", "3"); 570 Builder.defineMacro("__ATOMIC_ACQ_REL", "4"); 571 Builder.defineMacro("__ATOMIC_SEQ_CST", "5"); 572 573 // Support for #pragma redefine_extname (Sun compatibility) 574 Builder.defineMacro("__PRAGMA_REDEFINE_EXTNAME", "1"); 575 576 // As sad as it is, enough software depends on the __VERSION__ for version 577 // checks that it is necessary to report 4.2.1 (the base GCC version we claim 578 // compatibility with) first. 579 Builder.defineMacro("__VERSION__", "\"4.2.1 Compatible " + 580 Twine(getClangFullCPPVersion()) + "\""); 581 582 // Initialize language-specific preprocessor defines. 583 584 // Standard conforming mode? 585 if (!LangOpts.GNUMode && !LangOpts.MSVCCompat) 586 Builder.defineMacro("__STRICT_ANSI__"); 587 588 if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus11) 589 Builder.defineMacro("__GXX_EXPERIMENTAL_CXX0X__"); 590 591 if (LangOpts.ObjC1) { 592 if (LangOpts.ObjCRuntime.isNonFragile()) { 593 Builder.defineMacro("__OBJC2__"); 594 595 if (LangOpts.ObjCExceptions) 596 Builder.defineMacro("OBJC_ZEROCOST_EXCEPTIONS"); 597 } 598 599 if (LangOpts.getGC() != LangOptions::NonGC) 600 Builder.defineMacro("__OBJC_GC__"); 601 602 if (LangOpts.ObjCRuntime.isNeXTFamily()) 603 Builder.defineMacro("__NEXT_RUNTIME__"); 604 605 if (LangOpts.ObjCRuntime.getKind() == ObjCRuntime::ObjFW) { 606 VersionTuple tuple = LangOpts.ObjCRuntime.getVersion(); 607 608 unsigned minor = 0; 609 if (tuple.getMinor().hasValue()) 610 minor = tuple.getMinor().getValue(); 611 612 unsigned subminor = 0; 613 if (tuple.getSubminor().hasValue()) 614 subminor = tuple.getSubminor().getValue(); 615 616 Builder.defineMacro("__OBJFW_RUNTIME_ABI__", 617 Twine(tuple.getMajor() * 10000 + minor * 100 + 618 subminor)); 619 } 620 621 Builder.defineMacro("IBOutlet", "__attribute__((iboutlet))"); 622 Builder.defineMacro("IBOutletCollection(ClassName)", 623 "__attribute__((iboutletcollection(ClassName)))"); 624 Builder.defineMacro("IBAction", "void)__attribute__((ibaction)"); 625 Builder.defineMacro("IBInspectable", ""); 626 Builder.defineMacro("IB_DESIGNABLE", ""); 627 } 628 629 // Define a macro that describes the Objective-C boolean type even for C 630 // and C++ since BOOL can be used from non Objective-C code. 631 Builder.defineMacro("__OBJC_BOOL_IS_BOOL", 632 Twine(TI.useSignedCharForObjCBool() ? "0" : "1")); 633 634 if (LangOpts.CPlusPlus) 635 InitializeCPlusPlusFeatureTestMacros(LangOpts, Builder); 636 637 // darwin_constant_cfstrings controls this. This is also dependent 638 // on other things like the runtime I believe. This is set even for C code. 639 if (!LangOpts.NoConstantCFStrings) 640 Builder.defineMacro("__CONSTANT_CFSTRINGS__"); 641 642 if (LangOpts.ObjC2) 643 Builder.defineMacro("OBJC_NEW_PROPERTIES"); 644 645 if (LangOpts.PascalStrings) 646 Builder.defineMacro("__PASCAL_STRINGS__"); 647 648 if (LangOpts.Blocks) { 649 Builder.defineMacro("__block", "__attribute__((__blocks__(byref)))"); 650 Builder.defineMacro("__BLOCKS__"); 651 } 652 653 if (!LangOpts.MSVCCompat && LangOpts.Exceptions) 654 Builder.defineMacro("__EXCEPTIONS"); 655 if (!LangOpts.MSVCCompat && LangOpts.RTTI) 656 Builder.defineMacro("__GXX_RTTI"); 657 if (LangOpts.SjLjExceptions) 658 Builder.defineMacro("__USING_SJLJ_EXCEPTIONS__"); 659 660 if (LangOpts.Deprecated) 661 Builder.defineMacro("__DEPRECATED"); 662 663 if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus) { 664 Builder.defineMacro("__GNUG__", "4"); 665 Builder.defineMacro("__GXX_WEAK__"); 666 Builder.defineMacro("__private_extern__", "extern"); 667 } 668 669 if (LangOpts.MicrosoftExt) { 670 if (LangOpts.WChar) { 671 // wchar_t supported as a keyword. 672 Builder.defineMacro("_WCHAR_T_DEFINED"); 673 Builder.defineMacro("_NATIVE_WCHAR_T_DEFINED"); 674 } 675 } 676 677 if (LangOpts.Optimize) 678 Builder.defineMacro("__OPTIMIZE__"); 679 if (LangOpts.OptimizeSize) 680 Builder.defineMacro("__OPTIMIZE_SIZE__"); 681 682 if (LangOpts.FastMath) 683 Builder.defineMacro("__FAST_MATH__"); 684 685 // Initialize target-specific preprocessor defines. 686 687 // __BYTE_ORDER__ was added in GCC 4.6. It's analogous 688 // to the macro __BYTE_ORDER (no trailing underscores) 689 // from glibc's <endian.h> header. 690 // We don't support the PDP-11 as a target, but include 691 // the define so it can still be compared against. 692 Builder.defineMacro("__ORDER_LITTLE_ENDIAN__", "1234"); 693 Builder.defineMacro("__ORDER_BIG_ENDIAN__", "4321"); 694 Builder.defineMacro("__ORDER_PDP_ENDIAN__", "3412"); 695 if (TI.isBigEndian()) { 696 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_BIG_ENDIAN__"); 697 Builder.defineMacro("__BIG_ENDIAN__"); 698 } else { 699 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_LITTLE_ENDIAN__"); 700 Builder.defineMacro("__LITTLE_ENDIAN__"); 701 } 702 703 if (TI.getPointerWidth(0) == 64 && TI.getLongWidth() == 64 704 && TI.getIntWidth() == 32) { 705 Builder.defineMacro("_LP64"); 706 Builder.defineMacro("__LP64__"); 707 } 708 709 if (TI.getPointerWidth(0) == 32 && TI.getLongWidth() == 32 710 && TI.getIntWidth() == 32) { 711 Builder.defineMacro("_ILP32"); 712 Builder.defineMacro("__ILP32__"); 713 } 714 715 // Define type sizing macros based on the target properties. 716 assert(TI.getCharWidth() == 8 && "Only support 8-bit char so far"); 717 Builder.defineMacro("__CHAR_BIT__", Twine(TI.getCharWidth())); 718 719 DefineTypeSize("__SCHAR_MAX__", TargetInfo::SignedChar, TI, Builder); 720 DefineTypeSize("__SHRT_MAX__", TargetInfo::SignedShort, TI, Builder); 721 DefineTypeSize("__INT_MAX__", TargetInfo::SignedInt, TI, Builder); 722 DefineTypeSize("__LONG_MAX__", TargetInfo::SignedLong, TI, Builder); 723 DefineTypeSize("__LONG_LONG_MAX__", TargetInfo::SignedLongLong, TI, Builder); 724 DefineTypeSize("__WCHAR_MAX__", TI.getWCharType(), TI, Builder); 725 DefineTypeSize("__INTMAX_MAX__", TI.getIntMaxType(), TI, Builder); 726 DefineTypeSize("__SIZE_MAX__", TI.getSizeType(), TI, Builder); 727 728 DefineTypeSize("__UINTMAX_MAX__", TI.getUIntMaxType(), TI, Builder); 729 DefineTypeSize("__PTRDIFF_MAX__", TI.getPtrDiffType(0), TI, Builder); 730 DefineTypeSize("__INTPTR_MAX__", TI.getIntPtrType(), TI, Builder); 731 DefineTypeSize("__UINTPTR_MAX__", TI.getUIntPtrType(), TI, Builder); 732 733 DefineTypeSizeof("__SIZEOF_DOUBLE__", TI.getDoubleWidth(), TI, Builder); 734 DefineTypeSizeof("__SIZEOF_FLOAT__", TI.getFloatWidth(), TI, Builder); 735 DefineTypeSizeof("__SIZEOF_INT__", TI.getIntWidth(), TI, Builder); 736 DefineTypeSizeof("__SIZEOF_LONG__", TI.getLongWidth(), TI, Builder); 737 DefineTypeSizeof("__SIZEOF_LONG_DOUBLE__",TI.getLongDoubleWidth(),TI,Builder); 738 DefineTypeSizeof("__SIZEOF_LONG_LONG__", TI.getLongLongWidth(), TI, Builder); 739 DefineTypeSizeof("__SIZEOF_POINTER__", TI.getPointerWidth(0), TI, Builder); 740 DefineTypeSizeof("__SIZEOF_SHORT__", TI.getShortWidth(), TI, Builder); 741 DefineTypeSizeof("__SIZEOF_PTRDIFF_T__", 742 TI.getTypeWidth(TI.getPtrDiffType(0)), TI, Builder); 743 DefineTypeSizeof("__SIZEOF_SIZE_T__", 744 TI.getTypeWidth(TI.getSizeType()), TI, Builder); 745 DefineTypeSizeof("__SIZEOF_WCHAR_T__", 746 TI.getTypeWidth(TI.getWCharType()), TI, Builder); 747 DefineTypeSizeof("__SIZEOF_WINT_T__", 748 TI.getTypeWidth(TI.getWIntType()), TI, Builder); 749 if (TI.hasInt128Type()) 750 DefineTypeSizeof("__SIZEOF_INT128__", 128, TI, Builder); 751 752 DefineType("__INTMAX_TYPE__", TI.getIntMaxType(), Builder); 753 DefineFmt("__INTMAX", TI.getIntMaxType(), TI, Builder); 754 Builder.defineMacro("__INTMAX_C_SUFFIX__", 755 TI.getTypeConstantSuffix(TI.getIntMaxType())); 756 DefineType("__UINTMAX_TYPE__", TI.getUIntMaxType(), Builder); 757 DefineFmt("__UINTMAX", TI.getUIntMaxType(), TI, Builder); 758 Builder.defineMacro("__UINTMAX_C_SUFFIX__", 759 TI.getTypeConstantSuffix(TI.getUIntMaxType())); 760 DefineTypeWidth("__INTMAX_WIDTH__", TI.getIntMaxType(), TI, Builder); 761 DefineType("__PTRDIFF_TYPE__", TI.getPtrDiffType(0), Builder); 762 DefineFmt("__PTRDIFF", TI.getPtrDiffType(0), TI, Builder); 763 DefineTypeWidth("__PTRDIFF_WIDTH__", TI.getPtrDiffType(0), TI, Builder); 764 DefineType("__INTPTR_TYPE__", TI.getIntPtrType(), Builder); 765 DefineFmt("__INTPTR", TI.getIntPtrType(), TI, Builder); 766 DefineTypeWidth("__INTPTR_WIDTH__", TI.getIntPtrType(), TI, Builder); 767 DefineType("__SIZE_TYPE__", TI.getSizeType(), Builder); 768 DefineFmt("__SIZE", TI.getSizeType(), TI, Builder); 769 DefineTypeWidth("__SIZE_WIDTH__", TI.getSizeType(), TI, Builder); 770 DefineType("__WCHAR_TYPE__", TI.getWCharType(), Builder); 771 DefineTypeWidth("__WCHAR_WIDTH__", TI.getWCharType(), TI, Builder); 772 DefineType("__WINT_TYPE__", TI.getWIntType(), Builder); 773 DefineTypeWidth("__WINT_WIDTH__", TI.getWIntType(), TI, Builder); 774 DefineTypeWidth("__SIG_ATOMIC_WIDTH__", TI.getSigAtomicType(), TI, Builder); 775 DefineTypeSize("__SIG_ATOMIC_MAX__", TI.getSigAtomicType(), TI, Builder); 776 DefineType("__CHAR16_TYPE__", TI.getChar16Type(), Builder); 777 DefineType("__CHAR32_TYPE__", TI.getChar32Type(), Builder); 778 779 DefineTypeWidth("__UINTMAX_WIDTH__", TI.getUIntMaxType(), TI, Builder); 780 DefineType("__UINTPTR_TYPE__", TI.getUIntPtrType(), Builder); 781 DefineFmt("__UINTPTR", TI.getUIntPtrType(), TI, Builder); 782 DefineTypeWidth("__UINTPTR_WIDTH__", TI.getUIntPtrType(), TI, Builder); 783 784 DefineFloatMacros(Builder, "FLT", &TI.getFloatFormat(), "F"); 785 DefineFloatMacros(Builder, "DBL", &TI.getDoubleFormat(), ""); 786 DefineFloatMacros(Builder, "LDBL", &TI.getLongDoubleFormat(), "L"); 787 788 // Define a __POINTER_WIDTH__ macro for stdint.h. 789 Builder.defineMacro("__POINTER_WIDTH__", 790 Twine((int)TI.getPointerWidth(0))); 791 792 // Define __BIGGEST_ALIGNMENT__ to be compatible with gcc. 793 Builder.defineMacro("__BIGGEST_ALIGNMENT__", 794 Twine(TI.getSuitableAlign() / TI.getCharWidth()) ); 795 796 if (!LangOpts.CharIsSigned) 797 Builder.defineMacro("__CHAR_UNSIGNED__"); 798 799 if (!TargetInfo::isTypeSigned(TI.getWCharType())) 800 Builder.defineMacro("__WCHAR_UNSIGNED__"); 801 802 if (!TargetInfo::isTypeSigned(TI.getWIntType())) 803 Builder.defineMacro("__WINT_UNSIGNED__"); 804 805 // Define exact-width integer types for stdint.h 806 DefineExactWidthIntType(TargetInfo::SignedChar, TI, Builder); 807 808 if (TI.getShortWidth() > TI.getCharWidth()) 809 DefineExactWidthIntType(TargetInfo::SignedShort, TI, Builder); 810 811 if (TI.getIntWidth() > TI.getShortWidth()) 812 DefineExactWidthIntType(TargetInfo::SignedInt, TI, Builder); 813 814 if (TI.getLongWidth() > TI.getIntWidth()) 815 DefineExactWidthIntType(TargetInfo::SignedLong, TI, Builder); 816 817 if (TI.getLongLongWidth() > TI.getLongWidth()) 818 DefineExactWidthIntType(TargetInfo::SignedLongLong, TI, Builder); 819 820 DefineExactWidthIntType(TargetInfo::UnsignedChar, TI, Builder); 821 DefineExactWidthIntTypeSize(TargetInfo::UnsignedChar, TI, Builder); 822 DefineExactWidthIntTypeSize(TargetInfo::SignedChar, TI, Builder); 823 824 if (TI.getShortWidth() > TI.getCharWidth()) { 825 DefineExactWidthIntType(TargetInfo::UnsignedShort, TI, Builder); 826 DefineExactWidthIntTypeSize(TargetInfo::UnsignedShort, TI, Builder); 827 DefineExactWidthIntTypeSize(TargetInfo::SignedShort, TI, Builder); 828 } 829 830 if (TI.getIntWidth() > TI.getShortWidth()) { 831 DefineExactWidthIntType(TargetInfo::UnsignedInt, TI, Builder); 832 DefineExactWidthIntTypeSize(TargetInfo::UnsignedInt, TI, Builder); 833 DefineExactWidthIntTypeSize(TargetInfo::SignedInt, TI, Builder); 834 } 835 836 if (TI.getLongWidth() > TI.getIntWidth()) { 837 DefineExactWidthIntType(TargetInfo::UnsignedLong, TI, Builder); 838 DefineExactWidthIntTypeSize(TargetInfo::UnsignedLong, TI, Builder); 839 DefineExactWidthIntTypeSize(TargetInfo::SignedLong, TI, Builder); 840 } 841 842 if (TI.getLongLongWidth() > TI.getLongWidth()) { 843 DefineExactWidthIntType(TargetInfo::UnsignedLongLong, TI, Builder); 844 DefineExactWidthIntTypeSize(TargetInfo::UnsignedLongLong, TI, Builder); 845 DefineExactWidthIntTypeSize(TargetInfo::SignedLongLong, TI, Builder); 846 } 847 848 DefineLeastWidthIntType(8, true, TI, Builder); 849 DefineLeastWidthIntType(8, false, TI, Builder); 850 DefineLeastWidthIntType(16, true, TI, Builder); 851 DefineLeastWidthIntType(16, false, TI, Builder); 852 DefineLeastWidthIntType(32, true, TI, Builder); 853 DefineLeastWidthIntType(32, false, TI, Builder); 854 DefineLeastWidthIntType(64, true, TI, Builder); 855 DefineLeastWidthIntType(64, false, TI, Builder); 856 857 DefineFastIntType(8, true, TI, Builder); 858 DefineFastIntType(8, false, TI, Builder); 859 DefineFastIntType(16, true, TI, Builder); 860 DefineFastIntType(16, false, TI, Builder); 861 DefineFastIntType(32, true, TI, Builder); 862 DefineFastIntType(32, false, TI, Builder); 863 DefineFastIntType(64, true, TI, Builder); 864 DefineFastIntType(64, false, TI, Builder); 865 866 char UserLabelPrefix[2] = {TI.getDataLayout().getGlobalPrefix(), 0}; 867 Builder.defineMacro("__USER_LABEL_PREFIX__", UserLabelPrefix); 868 869 if (LangOpts.FastMath || LangOpts.FiniteMathOnly) 870 Builder.defineMacro("__FINITE_MATH_ONLY__", "1"); 871 else 872 Builder.defineMacro("__FINITE_MATH_ONLY__", "0"); 873 874 if (!LangOpts.MSVCCompat) { 875 if (LangOpts.GNUInline || LangOpts.CPlusPlus) 876 Builder.defineMacro("__GNUC_GNU_INLINE__"); 877 else 878 Builder.defineMacro("__GNUC_STDC_INLINE__"); 879 880 // The value written by __atomic_test_and_set. 881 // FIXME: This is target-dependent. 882 Builder.defineMacro("__GCC_ATOMIC_TEST_AND_SET_TRUEVAL", "1"); 883 884 // Used by libc++ and libstdc++ to implement ATOMIC_<foo>_LOCK_FREE. 885 unsigned InlineWidthBits = TI.getMaxAtomicInlineWidth(); 886 #define DEFINE_LOCK_FREE_MACRO(TYPE, Type) \ 887 Builder.defineMacro("__GCC_ATOMIC_" #TYPE "_LOCK_FREE", \ 888 getLockFreeValue(TI.get##Type##Width(), \ 889 InlineWidthBits)); 890 DEFINE_LOCK_FREE_MACRO(BOOL, Bool); 891 DEFINE_LOCK_FREE_MACRO(CHAR, Char); 892 DEFINE_LOCK_FREE_MACRO(CHAR16_T, Char16); 893 DEFINE_LOCK_FREE_MACRO(CHAR32_T, Char32); 894 DEFINE_LOCK_FREE_MACRO(WCHAR_T, WChar); 895 DEFINE_LOCK_FREE_MACRO(SHORT, Short); 896 DEFINE_LOCK_FREE_MACRO(INT, Int); 897 DEFINE_LOCK_FREE_MACRO(LONG, Long); 898 DEFINE_LOCK_FREE_MACRO(LLONG, LongLong); 899 Builder.defineMacro("__GCC_ATOMIC_POINTER_LOCK_FREE", 900 getLockFreeValue(TI.getPointerWidth(0), 901 InlineWidthBits)); 902 #undef DEFINE_LOCK_FREE_MACRO 903 } 904 905 if (LangOpts.NoInlineDefine) 906 Builder.defineMacro("__NO_INLINE__"); 907 908 if (unsigned PICLevel = LangOpts.PICLevel) { 909 Builder.defineMacro("__PIC__", Twine(PICLevel)); 910 Builder.defineMacro("__pic__", Twine(PICLevel)); 911 if (LangOpts.PIE) { 912 Builder.defineMacro("__PIE__", Twine(PICLevel)); 913 Builder.defineMacro("__pie__", Twine(PICLevel)); 914 } 915 } 916 917 // Macros to control C99 numerics and <float.h> 918 Builder.defineMacro("__FLT_EVAL_METHOD__", Twine(TI.getFloatEvalMethod())); 919 Builder.defineMacro("__FLT_RADIX__", "2"); 920 Builder.defineMacro("__DECIMAL_DIG__", "__LDBL_DECIMAL_DIG__"); 921 922 if (LangOpts.getStackProtector() == LangOptions::SSPOn) 923 Builder.defineMacro("__SSP__"); 924 else if (LangOpts.getStackProtector() == LangOptions::SSPStrong) 925 Builder.defineMacro("__SSP_STRONG__", "2"); 926 else if (LangOpts.getStackProtector() == LangOptions::SSPReq) 927 Builder.defineMacro("__SSP_ALL__", "3"); 928 929 // Define a macro that exists only when using the static analyzer. 930 if (FEOpts.ProgramAction == frontend::RunAnalysis) 931 Builder.defineMacro("__clang_analyzer__"); 932 933 if (LangOpts.FastRelaxedMath) 934 Builder.defineMacro("__FAST_RELAXED_MATH__"); 935 936 if (FEOpts.ProgramAction == frontend::RewriteObjC || 937 LangOpts.getGC() != LangOptions::NonGC) { 938 Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))"); 939 Builder.defineMacro("__strong", "__attribute__((objc_gc(strong)))"); 940 Builder.defineMacro("__autoreleasing", ""); 941 Builder.defineMacro("__unsafe_unretained", ""); 942 } else if (LangOpts.ObjC1) { 943 Builder.defineMacro("__weak", "__attribute__((objc_ownership(weak)))"); 944 Builder.defineMacro("__strong", "__attribute__((objc_ownership(strong)))"); 945 Builder.defineMacro("__autoreleasing", 946 "__attribute__((objc_ownership(autoreleasing)))"); 947 Builder.defineMacro("__unsafe_unretained", 948 "__attribute__((objc_ownership(none)))"); 949 } 950 951 // On Darwin, there are __double_underscored variants of the type 952 // nullability qualifiers. 953 if (TI.getTriple().isOSDarwin()) { 954 Builder.defineMacro("__nonnull", "_Nonnull"); 955 Builder.defineMacro("__null_unspecified", "_Null_unspecified"); 956 Builder.defineMacro("__nullable", "_Nullable"); 957 } 958 959 // OpenMP definition 960 // OpenMP 2.2: 961 // In implementations that support a preprocessor, the _OPENMP 962 // macro name is defined to have the decimal value yyyymm where 963 // yyyy and mm are the year and the month designations of the 964 // version of the OpenMP API that the implementation support. 965 switch (LangOpts.OpenMP) { 966 case 0: 967 break; 968 case 40: 969 Builder.defineMacro("_OPENMP", "201307"); 970 break; 971 case 45: 972 Builder.defineMacro("_OPENMP", "201511"); 973 break; 974 default: 975 // Default version is OpenMP 3.1 976 Builder.defineMacro("_OPENMP", "201107"); 977 break; 978 } 979 980 // CUDA device path compilaton 981 if (LangOpts.CUDAIsDevice) { 982 // The CUDA_ARCH value is set for the GPU target specified in the NVPTX 983 // backend's target defines. 984 Builder.defineMacro("__CUDA_ARCH__"); 985 } 986 987 // We need to communicate this to our CUDA header wrapper, which in turn 988 // informs the proper CUDA headers of this choice. 989 if (LangOpts.CUDADeviceApproxTranscendentals || LangOpts.FastMath) { 990 Builder.defineMacro("__CLANG_CUDA_APPROX_TRANSCENDENTALS__"); 991 } 992 993 // OpenCL definitions. 994 if (LangOpts.OpenCL) { 995 #define OPENCLEXT(Ext) \ 996 if (TI.getSupportedOpenCLOpts().isSupported(#Ext, \ 997 LangOpts.OpenCLVersion)) \ 998 Builder.defineMacro(#Ext); 999 #include "clang/Basic/OpenCLExtensions.def" 1000 } 1001 1002 if (TI.hasInt128Type() && LangOpts.CPlusPlus && LangOpts.GNUMode) { 1003 // For each extended integer type, g++ defines a macro mapping the 1004 // index of the type (0 in this case) in some list of extended types 1005 // to the type. 1006 Builder.defineMacro("__GLIBCXX_TYPE_INT_N_0", "__int128"); 1007 Builder.defineMacro("__GLIBCXX_BITSIZE_INT_N_0", "128"); 1008 } 1009 1010 // Get other target #defines. 1011 TI.getTargetDefines(LangOpts, Builder); 1012 } 1013 1014 /// InitializePreprocessor - Initialize the preprocessor getting it and the 1015 /// environment ready to process a single file. This returns true on error. 1016 /// 1017 void clang::InitializePreprocessor( 1018 Preprocessor &PP, const PreprocessorOptions &InitOpts, 1019 const PCHContainerReader &PCHContainerRdr, 1020 const FrontendOptions &FEOpts) { 1021 const LangOptions &LangOpts = PP.getLangOpts(); 1022 std::string PredefineBuffer; 1023 PredefineBuffer.reserve(4080); 1024 llvm::raw_string_ostream Predefines(PredefineBuffer); 1025 MacroBuilder Builder(Predefines); 1026 1027 // Emit line markers for various builtin sections of the file. We don't do 1028 // this in asm preprocessor mode, because "# 4" is not a line marker directive 1029 // in this mode. 1030 if (!PP.getLangOpts().AsmPreprocessor) 1031 Builder.append("# 1 \"<built-in>\" 3"); 1032 1033 // Install things like __POWERPC__, __GNUC__, etc into the macro table. 1034 if (InitOpts.UsePredefines) { 1035 if (LangOpts.CUDA && PP.getAuxTargetInfo()) 1036 InitializePredefinedMacros(*PP.getAuxTargetInfo(), LangOpts, FEOpts, 1037 Builder); 1038 1039 InitializePredefinedMacros(PP.getTargetInfo(), LangOpts, FEOpts, Builder); 1040 1041 // Install definitions to make Objective-C++ ARC work well with various 1042 // C++ Standard Library implementations. 1043 if (LangOpts.ObjC1 && LangOpts.CPlusPlus && 1044 (LangOpts.ObjCAutoRefCount || LangOpts.ObjCWeak)) { 1045 switch (InitOpts.ObjCXXARCStandardLibrary) { 1046 case ARCXX_nolib: 1047 case ARCXX_libcxx: 1048 break; 1049 1050 case ARCXX_libstdcxx: 1051 AddObjCXXARCLibstdcxxDefines(LangOpts, Builder); 1052 break; 1053 } 1054 } 1055 } 1056 1057 // Even with predefines off, some macros are still predefined. 1058 // These should all be defined in the preprocessor according to the 1059 // current language configuration. 1060 InitializeStandardPredefinedMacros(PP.getTargetInfo(), PP.getLangOpts(), 1061 FEOpts, Builder); 1062 1063 // Add on the predefines from the driver. Wrap in a #line directive to report 1064 // that they come from the command line. 1065 if (!PP.getLangOpts().AsmPreprocessor) 1066 Builder.append("# 1 \"<command line>\" 1"); 1067 1068 // Process #define's and #undef's in the order they are given. 1069 for (unsigned i = 0, e = InitOpts.Macros.size(); i != e; ++i) { 1070 if (InitOpts.Macros[i].second) // isUndef 1071 Builder.undefineMacro(InitOpts.Macros[i].first); 1072 else 1073 DefineBuiltinMacro(Builder, InitOpts.Macros[i].first, 1074 PP.getDiagnostics()); 1075 } 1076 1077 // Exit the command line and go back to <built-in> (2 is LC_LEAVE). 1078 if (!PP.getLangOpts().AsmPreprocessor) 1079 Builder.append("# 1 \"<built-in>\" 2"); 1080 1081 // If -imacros are specified, include them now. These are processed before 1082 // any -include directives. 1083 for (unsigned i = 0, e = InitOpts.MacroIncludes.size(); i != e; ++i) 1084 AddImplicitIncludeMacros(Builder, InitOpts.MacroIncludes[i]); 1085 1086 // Process -include-pch/-include-pth directives. 1087 if (!InitOpts.ImplicitPCHInclude.empty()) 1088 AddImplicitIncludePCH(Builder, PP, PCHContainerRdr, 1089 InitOpts.ImplicitPCHInclude); 1090 if (!InitOpts.ImplicitPTHInclude.empty()) 1091 AddImplicitIncludePTH(Builder, PP, InitOpts.ImplicitPTHInclude); 1092 1093 // Process -include directives. 1094 for (unsigned i = 0, e = InitOpts.Includes.size(); i != e; ++i) { 1095 const std::string &Path = InitOpts.Includes[i]; 1096 AddImplicitInclude(Builder, Path); 1097 } 1098 1099 // Instruct the preprocessor to skip the preamble. 1100 PP.setSkipMainFilePreamble(InitOpts.PrecompiledPreambleBytes.first, 1101 InitOpts.PrecompiledPreambleBytes.second); 1102 1103 // Copy PredefinedBuffer into the Preprocessor. 1104 PP.setPredefines(Predefines.str()); 1105 } 1106