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