InitPreprocessor.cpp revision 328381
1//===--- InitPreprocessor.cpp - PP initialization code. ---------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file implements the clang::InitializePreprocessor function. 11// 12//===----------------------------------------------------------------------===// 13 14#include "clang/Basic/FileManager.h" 15#include "clang/Basic/MacroBuilder.h" 16#include "clang/Basic/SourceManager.h" 17#include "clang/Basic/SyncScope.h" 18#include "clang/Basic/TargetInfo.h" 19#include "clang/Basic/Version.h" 20#include "clang/Frontend/FrontendDiagnostic.h" 21#include "clang/Frontend/FrontendOptions.h" 22#include "clang/Frontend/Utils.h" 23#include "clang/Lex/HeaderSearch.h" 24#include "clang/Lex/PTHManager.h" 25#include "clang/Lex/Preprocessor.h" 26#include "clang/Lex/PreprocessorOptions.h" 27#include "clang/Serialization/ASTReader.h" 28#include "llvm/ADT/APFloat.h" 29using namespace clang; 30 31static bool MacroBodyEndsInBackslash(StringRef MacroBody) { 32 while (!MacroBody.empty() && isWhitespace(MacroBody.back())) 33 MacroBody = MacroBody.drop_back(); 34 return !MacroBody.empty() && MacroBody.back() == '\\'; 35} 36 37// Append a #define line to Buf for Macro. Macro should be of the form XXX, 38// in which case we emit "#define XXX 1" or "XXX=Y z W" in which case we emit 39// "#define XXX Y z W". To get a #define with no value, use "XXX=". 40static void DefineBuiltinMacro(MacroBuilder &Builder, StringRef Macro, 41 DiagnosticsEngine &Diags) { 42 std::pair<StringRef, StringRef> MacroPair = Macro.split('='); 43 StringRef MacroName = MacroPair.first; 44 StringRef MacroBody = MacroPair.second; 45 if (MacroName.size() != Macro.size()) { 46 // Per GCC -D semantics, the macro ends at \n if it exists. 47 StringRef::size_type End = MacroBody.find_first_of("\n\r"); 48 if (End != StringRef::npos) 49 Diags.Report(diag::warn_fe_macro_contains_embedded_newline) 50 << MacroName; 51 MacroBody = MacroBody.substr(0, End); 52 // We handle macro bodies which end in a backslash by appending an extra 53 // backslash+newline. This makes sure we don't accidentally treat the 54 // backslash as a line continuation marker. 55 if (MacroBodyEndsInBackslash(MacroBody)) 56 Builder.defineMacro(MacroName, Twine(MacroBody) + "\\\n"); 57 else 58 Builder.defineMacro(MacroName, MacroBody); 59 } else { 60 // Push "macroname 1". 61 Builder.defineMacro(Macro); 62 } 63} 64 65/// AddImplicitInclude - Add an implicit \#include of the specified file to the 66/// predefines buffer. 67/// As these includes are generated by -include arguments the header search 68/// logic is going to search relatively to the current working directory. 69static void AddImplicitInclude(MacroBuilder &Builder, StringRef File) { 70 Builder.append(Twine("#include \"") + File + "\""); 71} 72 73static void AddImplicitIncludeMacros(MacroBuilder &Builder, StringRef File) { 74 Builder.append(Twine("#__include_macros \"") + File + "\""); 75 // Marker token to stop the __include_macros fetch loop. 76 Builder.append("##"); // ##? 77} 78 79/// AddImplicitIncludePTH - Add an implicit \#include using the original file 80/// used to generate a PTH cache. 81static void AddImplicitIncludePTH(MacroBuilder &Builder, Preprocessor &PP, 82 StringRef ImplicitIncludePTH) { 83 PTHManager *P = PP.getPTHManager(); 84 // Null check 'P' in the corner case where it couldn't be created. 85 const char *OriginalFile = P ? P->getOriginalSourceFile() : nullptr; 86 87 if (!OriginalFile) { 88 PP.getDiagnostics().Report(diag::err_fe_pth_file_has_no_source_header) 89 << ImplicitIncludePTH; 90 return; 91 } 92 93 AddImplicitInclude(Builder, OriginalFile); 94} 95 96/// \brief Add an implicit \#include using the original file used to generate 97/// a PCH file. 98static void AddImplicitIncludePCH(MacroBuilder &Builder, Preprocessor &PP, 99 const PCHContainerReader &PCHContainerRdr, 100 StringRef ImplicitIncludePCH) { 101 std::string OriginalFile = 102 ASTReader::getOriginalSourceFile(ImplicitIncludePCH, PP.getFileManager(), 103 PCHContainerRdr, PP.getDiagnostics()); 104 if (OriginalFile.empty()) 105 return; 106 107 AddImplicitInclude(Builder, OriginalFile); 108} 109 110/// PickFP - This is used to pick a value based on the FP semantics of the 111/// specified FP model. 112template <typename T> 113static T PickFP(const llvm::fltSemantics *Sem, T IEEEHalfVal, T IEEESingleVal, 114 T IEEEDoubleVal, T X87DoubleExtendedVal, T PPCDoubleDoubleVal, 115 T IEEEQuadVal) { 116 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEhalf()) 117 return IEEEHalfVal; 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 130static void DefineFloatMacros(MacroBuilder &Builder, StringRef Prefix, 131 const llvm::fltSemantics *Sem, StringRef Ext) { 132 const char *DenormMin, *Epsilon, *Max, *Min; 133 DenormMin = PickFP(Sem, "5.9604644775390625e-8", "1.40129846e-45", 134 "4.9406564584124654e-324", "3.64519953188247460253e-4951", 135 "4.94065645841246544176568792868221e-324", 136 "6.47517511943802511092443895822764655e-4966"); 137 int Digits = PickFP(Sem, 3, 6, 15, 18, 31, 33); 138 int DecimalDigits = PickFP(Sem, 5, 9, 17, 21, 33, 36); 139 Epsilon = PickFP(Sem, "9.765625e-4", "1.19209290e-7", 140 "2.2204460492503131e-16", "1.08420217248550443401e-19", 141 "4.94065645841246544176568792868221e-324", 142 "1.92592994438723585305597794258492732e-34"); 143 int MantissaDigits = PickFP(Sem, 11, 24, 53, 64, 106, 113); 144 int Min10Exp = PickFP(Sem, -13, -37, -307, -4931, -291, -4931); 145 int Max10Exp = PickFP(Sem, 4, 38, 308, 4932, 308, 4932); 146 int MinExp = PickFP(Sem, -14, -125, -1021, -16381, -968, -16381); 147 int MaxExp = PickFP(Sem, 15, 128, 1024, 16384, 1024, 16384); 148 Min = PickFP(Sem, "6.103515625e-5", "1.17549435e-38", "2.2250738585072014e-308", 149 "3.36210314311209350626e-4932", 150 "2.00416836000897277799610805135016e-292", 151 "3.36210314311209350626267781732175260e-4932"); 152 Max = PickFP(Sem, "6.5504e+4", "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). 184static 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 194static 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 200static 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 210static void DefineType(const Twine &MacroName, TargetInfo::IntType Ty, 211 MacroBuilder &Builder) { 212 Builder.defineMacro(MacroName, TargetInfo::getTypeName(Ty)); 213} 214 215static void DefineTypeWidth(StringRef MacroName, TargetInfo::IntType Ty, 216 const TargetInfo &TI, MacroBuilder &Builder) { 217 Builder.defineMacro(MacroName, Twine(TI.getTypeWidth(Ty))); 218} 219 220static void DefineTypeSizeof(StringRef MacroName, unsigned BitWidth, 221 const TargetInfo &TI, MacroBuilder &Builder) { 222 Builder.defineMacro(MacroName, 223 Twine(BitWidth / TI.getCharWidth())); 224} 225 226static 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 246static 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 261static 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 274static 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. 292static 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). 306static 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 361static 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.C17) 374 Builder.defineMacro("__STDC_VERSION__", "201710L"); 375 else if (LangOpts.C11) 376 Builder.defineMacro("__STDC_VERSION__", "201112L"); 377 else if (LangOpts.C99) 378 Builder.defineMacro("__STDC_VERSION__", "199901L"); 379 else if (!LangOpts.GNUMode && LangOpts.Digraphs) 380 Builder.defineMacro("__STDC_VERSION__", "199409L"); 381 } else { 382 // FIXME: Use correct value for C++20. 383 if (LangOpts.CPlusPlus2a) 384 Builder.defineMacro("__cplusplus", "201707L"); 385 // C++17 [cpp.predefined]p1: 386 // The name __cplusplus is defined to the value 201703L when compiling a 387 // C++ translation unit. 388 else if (LangOpts.CPlusPlus17) 389 Builder.defineMacro("__cplusplus", "201703L"); 390 // C++1y [cpp.predefined]p1: 391 // The name __cplusplus is defined to the value 201402L when compiling a 392 // C++ translation unit. 393 else if (LangOpts.CPlusPlus14) 394 Builder.defineMacro("__cplusplus", "201402L"); 395 // C++11 [cpp.predefined]p1: 396 // The name __cplusplus is defined to the value 201103L when compiling a 397 // C++ translation unit. 398 else if (LangOpts.CPlusPlus11) 399 Builder.defineMacro("__cplusplus", "201103L"); 400 // C++03 [cpp.predefined]p1: 401 // The name __cplusplus is defined to the value 199711L when compiling a 402 // C++ translation unit. 403 else 404 Builder.defineMacro("__cplusplus", "199711L"); 405 406 // C++1z [cpp.predefined]p1: 407 // An integer literal of type std::size_t whose value is the alignment 408 // guaranteed by a call to operator new(std::size_t) 409 // 410 // We provide this in all language modes, since it seems generally useful. 411 Builder.defineMacro("__STDCPP_DEFAULT_NEW_ALIGNMENT__", 412 Twine(TI.getNewAlign() / TI.getCharWidth()) + 413 TI.getTypeConstantSuffix(TI.getSizeType())); 414 } 415 416 // In C11 these are environment macros. In C++11 they are only defined 417 // as part of <cuchar>. To prevent breakage when mixing C and C++ 418 // code, define these macros unconditionally. We can define them 419 // unconditionally, as Clang always uses UTF-16 and UTF-32 for 16-bit 420 // and 32-bit character literals. 421 Builder.defineMacro("__STDC_UTF_16__", "1"); 422 Builder.defineMacro("__STDC_UTF_32__", "1"); 423 424 if (LangOpts.ObjC1) 425 Builder.defineMacro("__OBJC__"); 426 427 // OpenCL v1.0/1.1 s6.9, v1.2/2.0 s6.10: Preprocessor Directives and Macros. 428 if (LangOpts.OpenCL) { 429 // OpenCL v1.0 and v1.1 do not have a predefined macro to indicate the 430 // language standard with which the program is compiled. __OPENCL_VERSION__ 431 // is for the OpenCL version supported by the OpenCL device, which is not 432 // necessarily the language standard with which the program is compiled. 433 // A shared OpenCL header file requires a macro to indicate the language 434 // standard. As a workaround, __OPENCL_C_VERSION__ is defined for 435 // OpenCL v1.0 and v1.1. 436 switch (LangOpts.OpenCLVersion) { 437 case 100: 438 Builder.defineMacro("__OPENCL_C_VERSION__", "100"); 439 break; 440 case 110: 441 Builder.defineMacro("__OPENCL_C_VERSION__", "110"); 442 break; 443 case 120: 444 Builder.defineMacro("__OPENCL_C_VERSION__", "120"); 445 break; 446 case 200: 447 Builder.defineMacro("__OPENCL_C_VERSION__", "200"); 448 break; 449 default: 450 llvm_unreachable("Unsupported OpenCL version"); 451 } 452 Builder.defineMacro("CL_VERSION_1_0", "100"); 453 Builder.defineMacro("CL_VERSION_1_1", "110"); 454 Builder.defineMacro("CL_VERSION_1_2", "120"); 455 Builder.defineMacro("CL_VERSION_2_0", "200"); 456 457 if (TI.isLittleEndian()) 458 Builder.defineMacro("__ENDIAN_LITTLE__"); 459 460 if (LangOpts.FastRelaxedMath) 461 Builder.defineMacro("__FAST_RELAXED_MATH__"); 462 } 463 // Not "standard" per se, but available even with the -undef flag. 464 if (LangOpts.AsmPreprocessor) 465 Builder.defineMacro("__ASSEMBLER__"); 466 if (LangOpts.CUDA) 467 Builder.defineMacro("__CUDA__"); 468} 469 470/// Initialize the predefined C++ language feature test macros defined in 471/// ISO/IEC JTC1/SC22/WG21 (C++) SD-6: "SG10 Feature Test Recommendations". 472static void InitializeCPlusPlusFeatureTestMacros(const LangOptions &LangOpts, 473 MacroBuilder &Builder) { 474 // C++98 features. 475 if (LangOpts.RTTI) 476 Builder.defineMacro("__cpp_rtti", "199711"); 477 if (LangOpts.CXXExceptions) 478 Builder.defineMacro("__cpp_exceptions", "199711"); 479 480 // C++11 features. 481 if (LangOpts.CPlusPlus11) { 482 Builder.defineMacro("__cpp_unicode_characters", "200704"); 483 Builder.defineMacro("__cpp_raw_strings", "200710"); 484 Builder.defineMacro("__cpp_unicode_literals", "200710"); 485 Builder.defineMacro("__cpp_user_defined_literals", "200809"); 486 Builder.defineMacro("__cpp_lambdas", "200907"); 487 Builder.defineMacro("__cpp_constexpr", 488 LangOpts.CPlusPlus17 ? "201603" : 489 LangOpts.CPlusPlus14 ? "201304" : "200704"); 490 Builder.defineMacro("__cpp_range_based_for", 491 LangOpts.CPlusPlus17 ? "201603" : "200907"); 492 Builder.defineMacro("__cpp_static_assert", 493 LangOpts.CPlusPlus17 ? "201411" : "200410"); 494 Builder.defineMacro("__cpp_decltype", "200707"); 495 Builder.defineMacro("__cpp_attributes", "200809"); 496 Builder.defineMacro("__cpp_rvalue_references", "200610"); 497 Builder.defineMacro("__cpp_variadic_templates", "200704"); 498 Builder.defineMacro("__cpp_initializer_lists", "200806"); 499 Builder.defineMacro("__cpp_delegating_constructors", "200604"); 500 Builder.defineMacro("__cpp_nsdmi", "200809"); 501 Builder.defineMacro("__cpp_inheriting_constructors", "201511"); 502 Builder.defineMacro("__cpp_ref_qualifiers", "200710"); 503 Builder.defineMacro("__cpp_alias_templates", "200704"); 504 } 505 if (LangOpts.ThreadsafeStatics) 506 Builder.defineMacro("__cpp_threadsafe_static_init", "200806"); 507 508 // C++14 features. 509 if (LangOpts.CPlusPlus14) { 510 Builder.defineMacro("__cpp_binary_literals", "201304"); 511 Builder.defineMacro("__cpp_digit_separators", "201309"); 512 Builder.defineMacro("__cpp_init_captures", "201304"); 513 Builder.defineMacro("__cpp_generic_lambdas", "201304"); 514 Builder.defineMacro("__cpp_decltype_auto", "201304"); 515 Builder.defineMacro("__cpp_return_type_deduction", "201304"); 516 Builder.defineMacro("__cpp_aggregate_nsdmi", "201304"); 517 Builder.defineMacro("__cpp_variable_templates", "201304"); 518 } 519 if (LangOpts.SizedDeallocation) 520 Builder.defineMacro("__cpp_sized_deallocation", "201309"); 521 522 // C++17 features. 523 if (LangOpts.CPlusPlus17) { 524 Builder.defineMacro("__cpp_hex_float", "201603"); 525 Builder.defineMacro("__cpp_inline_variables", "201606"); 526 Builder.defineMacro("__cpp_noexcept_function_type", "201510"); 527 Builder.defineMacro("__cpp_capture_star_this", "201603"); 528 Builder.defineMacro("__cpp_if_constexpr", "201606"); 529 Builder.defineMacro("__cpp_deduction_guides", "201611"); 530 Builder.defineMacro("__cpp_template_auto", "201606"); 531 Builder.defineMacro("__cpp_namespace_attributes", "201411"); 532 Builder.defineMacro("__cpp_enumerator_attributes", "201411"); 533 Builder.defineMacro("__cpp_nested_namespace_definitions", "201411"); 534 Builder.defineMacro("__cpp_variadic_using", "201611"); 535 Builder.defineMacro("__cpp_aggregate_bases", "201603"); 536 Builder.defineMacro("__cpp_structured_bindings", "201606"); 537 Builder.defineMacro("__cpp_nontype_template_args", "201411"); 538 Builder.defineMacro("__cpp_fold_expressions", "201603"); 539 } 540 if (LangOpts.AlignedAllocation) 541 Builder.defineMacro("__cpp_aligned_new", "201606"); 542 543 // TS features. 544 if (LangOpts.ConceptsTS) 545 Builder.defineMacro("__cpp_experimental_concepts", "1"); 546 if (LangOpts.CoroutinesTS) 547 Builder.defineMacro("__cpp_coroutines", "201703L"); 548} 549 550static void InitializePredefinedMacros(const TargetInfo &TI, 551 const LangOptions &LangOpts, 552 const FrontendOptions &FEOpts, 553 MacroBuilder &Builder) { 554 // Compiler version introspection macros. 555 Builder.defineMacro("__llvm__"); // LLVM Backend 556 Builder.defineMacro("__clang__"); // Clang Frontend 557#define TOSTR2(X) #X 558#define TOSTR(X) TOSTR2(X) 559 Builder.defineMacro("__clang_major__", TOSTR(CLANG_VERSION_MAJOR)); 560 Builder.defineMacro("__clang_minor__", TOSTR(CLANG_VERSION_MINOR)); 561 Builder.defineMacro("__clang_patchlevel__", TOSTR(CLANG_VERSION_PATCHLEVEL)); 562#undef TOSTR 563#undef TOSTR2 564 Builder.defineMacro("__clang_version__", 565 "\"" CLANG_VERSION_STRING " " 566 + getClangFullRepositoryVersion() + "\""); 567 if (!LangOpts.MSVCCompat) { 568 // Currently claim to be compatible with GCC 4.2.1-5621, but only if we're 569 // not compiling for MSVC compatibility 570 Builder.defineMacro("__GNUC_MINOR__", "2"); 571 Builder.defineMacro("__GNUC_PATCHLEVEL__", "1"); 572 Builder.defineMacro("__GNUC__", "4"); 573 Builder.defineMacro("__GXX_ABI_VERSION", "1002"); 574 } 575 576 // Define macros for the C11 / C++11 memory orderings 577 Builder.defineMacro("__ATOMIC_RELAXED", "0"); 578 Builder.defineMacro("__ATOMIC_CONSUME", "1"); 579 Builder.defineMacro("__ATOMIC_ACQUIRE", "2"); 580 Builder.defineMacro("__ATOMIC_RELEASE", "3"); 581 Builder.defineMacro("__ATOMIC_ACQ_REL", "4"); 582 Builder.defineMacro("__ATOMIC_SEQ_CST", "5"); 583 584 // Define macros for the OpenCL memory scope. 585 // The values should match AtomicScopeOpenCLModel::ID enum. 586 static_assert( 587 static_cast<unsigned>(AtomicScopeOpenCLModel::WorkGroup) == 1 && 588 static_cast<unsigned>(AtomicScopeOpenCLModel::Device) == 2 && 589 static_cast<unsigned>(AtomicScopeOpenCLModel::AllSVMDevices) == 3 && 590 static_cast<unsigned>(AtomicScopeOpenCLModel::SubGroup) == 4, 591 "Invalid OpenCL memory scope enum definition"); 592 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_WORK_ITEM", "0"); 593 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_WORK_GROUP", "1"); 594 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_DEVICE", "2"); 595 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_ALL_SVM_DEVICES", "3"); 596 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_SUB_GROUP", "4"); 597 598 // Support for #pragma redefine_extname (Sun compatibility) 599 Builder.defineMacro("__PRAGMA_REDEFINE_EXTNAME", "1"); 600 601 // As sad as it is, enough software depends on the __VERSION__ for version 602 // checks that it is necessary to report 4.2.1 (the base GCC version we claim 603 // compatibility with) first. 604 Builder.defineMacro("__VERSION__", "\"4.2.1 Compatible " + 605 Twine(getClangFullCPPVersion()) + "\""); 606 607 // Initialize language-specific preprocessor defines. 608 609 // Standard conforming mode? 610 if (!LangOpts.GNUMode && !LangOpts.MSVCCompat) 611 Builder.defineMacro("__STRICT_ANSI__"); 612 613 if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus11) 614 Builder.defineMacro("__GXX_EXPERIMENTAL_CXX0X__"); 615 616 if (LangOpts.ObjC1) { 617 if (LangOpts.ObjCRuntime.isNonFragile()) { 618 Builder.defineMacro("__OBJC2__"); 619 620 if (LangOpts.ObjCExceptions) 621 Builder.defineMacro("OBJC_ZEROCOST_EXCEPTIONS"); 622 } 623 624 if (LangOpts.getGC() != LangOptions::NonGC) 625 Builder.defineMacro("__OBJC_GC__"); 626 627 if (LangOpts.ObjCRuntime.isNeXTFamily()) 628 Builder.defineMacro("__NEXT_RUNTIME__"); 629 630 if (LangOpts.ObjCRuntime.getKind() == ObjCRuntime::ObjFW) { 631 VersionTuple tuple = LangOpts.ObjCRuntime.getVersion(); 632 633 unsigned minor = 0; 634 if (tuple.getMinor().hasValue()) 635 minor = tuple.getMinor().getValue(); 636 637 unsigned subminor = 0; 638 if (tuple.getSubminor().hasValue()) 639 subminor = tuple.getSubminor().getValue(); 640 641 Builder.defineMacro("__OBJFW_RUNTIME_ABI__", 642 Twine(tuple.getMajor() * 10000 + minor * 100 + 643 subminor)); 644 } 645 646 Builder.defineMacro("IBOutlet", "__attribute__((iboutlet))"); 647 Builder.defineMacro("IBOutletCollection(ClassName)", 648 "__attribute__((iboutletcollection(ClassName)))"); 649 Builder.defineMacro("IBAction", "void)__attribute__((ibaction)"); 650 Builder.defineMacro("IBInspectable", ""); 651 Builder.defineMacro("IB_DESIGNABLE", ""); 652 } 653 654 // Define a macro that describes the Objective-C boolean type even for C 655 // and C++ since BOOL can be used from non Objective-C code. 656 Builder.defineMacro("__OBJC_BOOL_IS_BOOL", 657 Twine(TI.useSignedCharForObjCBool() ? "0" : "1")); 658 659 if (LangOpts.CPlusPlus) 660 InitializeCPlusPlusFeatureTestMacros(LangOpts, Builder); 661 662 // darwin_constant_cfstrings controls this. This is also dependent 663 // on other things like the runtime I believe. This is set even for C code. 664 if (!LangOpts.NoConstantCFStrings) 665 Builder.defineMacro("__CONSTANT_CFSTRINGS__"); 666 667 if (LangOpts.ObjC2) 668 Builder.defineMacro("OBJC_NEW_PROPERTIES"); 669 670 if (LangOpts.PascalStrings) 671 Builder.defineMacro("__PASCAL_STRINGS__"); 672 673 if (LangOpts.Blocks) { 674 Builder.defineMacro("__block", "__attribute__((__blocks__(byref)))"); 675 Builder.defineMacro("__BLOCKS__"); 676 } 677 678 if (!LangOpts.MSVCCompat && LangOpts.Exceptions) 679 Builder.defineMacro("__EXCEPTIONS"); 680 if (!LangOpts.MSVCCompat && LangOpts.RTTI) 681 Builder.defineMacro("__GXX_RTTI"); 682 683 if (LangOpts.SjLjExceptions) 684 Builder.defineMacro("__USING_SJLJ_EXCEPTIONS__"); 685 else if (LangOpts.SEHExceptions) 686 Builder.defineMacro("__SEH__"); 687 else if (LangOpts.DWARFExceptions && 688 (TI.getTriple().isThumb() || TI.getTriple().isARM())) 689 Builder.defineMacro("__ARM_DWARF_EH__"); 690 691 if (LangOpts.Deprecated) 692 Builder.defineMacro("__DEPRECATED"); 693 694 if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus) { 695 Builder.defineMacro("__GNUG__", "4"); 696 Builder.defineMacro("__GXX_WEAK__"); 697 Builder.defineMacro("__private_extern__", "extern"); 698 } 699 700 if (LangOpts.MicrosoftExt) { 701 if (LangOpts.WChar) { 702 // wchar_t supported as a keyword. 703 Builder.defineMacro("_WCHAR_T_DEFINED"); 704 Builder.defineMacro("_NATIVE_WCHAR_T_DEFINED"); 705 } 706 } 707 708 if (LangOpts.Optimize) 709 Builder.defineMacro("__OPTIMIZE__"); 710 if (LangOpts.OptimizeSize) 711 Builder.defineMacro("__OPTIMIZE_SIZE__"); 712 713 if (LangOpts.FastMath) 714 Builder.defineMacro("__FAST_MATH__"); 715 716 // Initialize target-specific preprocessor defines. 717 718 // __BYTE_ORDER__ was added in GCC 4.6. It's analogous 719 // to the macro __BYTE_ORDER (no trailing underscores) 720 // from glibc's <endian.h> header. 721 // We don't support the PDP-11 as a target, but include 722 // the define so it can still be compared against. 723 Builder.defineMacro("__ORDER_LITTLE_ENDIAN__", "1234"); 724 Builder.defineMacro("__ORDER_BIG_ENDIAN__", "4321"); 725 Builder.defineMacro("__ORDER_PDP_ENDIAN__", "3412"); 726 if (TI.isBigEndian()) { 727 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_BIG_ENDIAN__"); 728 Builder.defineMacro("__BIG_ENDIAN__"); 729 } else { 730 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_LITTLE_ENDIAN__"); 731 Builder.defineMacro("__LITTLE_ENDIAN__"); 732 } 733 734 if (TI.getPointerWidth(0) == 64 && TI.getLongWidth() == 64 735 && TI.getIntWidth() == 32) { 736 Builder.defineMacro("_LP64"); 737 Builder.defineMacro("__LP64__"); 738 } 739 740 if (TI.getPointerWidth(0) == 32 && TI.getLongWidth() == 32 741 && TI.getIntWidth() == 32) { 742 Builder.defineMacro("_ILP32"); 743 Builder.defineMacro("__ILP32__"); 744 } 745 746 // Define type sizing macros based on the target properties. 747 assert(TI.getCharWidth() == 8 && "Only support 8-bit char so far"); 748 Builder.defineMacro("__CHAR_BIT__", Twine(TI.getCharWidth())); 749 750 DefineTypeSize("__SCHAR_MAX__", TargetInfo::SignedChar, TI, Builder); 751 DefineTypeSize("__SHRT_MAX__", TargetInfo::SignedShort, TI, Builder); 752 DefineTypeSize("__INT_MAX__", TargetInfo::SignedInt, TI, Builder); 753 DefineTypeSize("__LONG_MAX__", TargetInfo::SignedLong, TI, Builder); 754 DefineTypeSize("__LONG_LONG_MAX__", TargetInfo::SignedLongLong, TI, Builder); 755 DefineTypeSize("__WCHAR_MAX__", TI.getWCharType(), TI, Builder); 756 DefineTypeSize("__WINT_MAX__", TI.getWIntType(), TI, Builder); 757 DefineTypeSize("__INTMAX_MAX__", TI.getIntMaxType(), TI, Builder); 758 DefineTypeSize("__SIZE_MAX__", TI.getSizeType(), TI, Builder); 759 760 DefineTypeSize("__UINTMAX_MAX__", TI.getUIntMaxType(), TI, Builder); 761 DefineTypeSize("__PTRDIFF_MAX__", TI.getPtrDiffType(0), TI, Builder); 762 DefineTypeSize("__INTPTR_MAX__", TI.getIntPtrType(), TI, Builder); 763 DefineTypeSize("__UINTPTR_MAX__", TI.getUIntPtrType(), TI, Builder); 764 765 DefineTypeSizeof("__SIZEOF_DOUBLE__", TI.getDoubleWidth(), TI, Builder); 766 DefineTypeSizeof("__SIZEOF_FLOAT__", TI.getFloatWidth(), TI, Builder); 767 DefineTypeSizeof("__SIZEOF_INT__", TI.getIntWidth(), TI, Builder); 768 DefineTypeSizeof("__SIZEOF_LONG__", TI.getLongWidth(), TI, Builder); 769 DefineTypeSizeof("__SIZEOF_LONG_DOUBLE__",TI.getLongDoubleWidth(),TI,Builder); 770 DefineTypeSizeof("__SIZEOF_LONG_LONG__", TI.getLongLongWidth(), TI, Builder); 771 DefineTypeSizeof("__SIZEOF_POINTER__", TI.getPointerWidth(0), TI, Builder); 772 DefineTypeSizeof("__SIZEOF_SHORT__", TI.getShortWidth(), TI, Builder); 773 DefineTypeSizeof("__SIZEOF_PTRDIFF_T__", 774 TI.getTypeWidth(TI.getPtrDiffType(0)), TI, Builder); 775 DefineTypeSizeof("__SIZEOF_SIZE_T__", 776 TI.getTypeWidth(TI.getSizeType()), TI, Builder); 777 DefineTypeSizeof("__SIZEOF_WCHAR_T__", 778 TI.getTypeWidth(TI.getWCharType()), TI, Builder); 779 DefineTypeSizeof("__SIZEOF_WINT_T__", 780 TI.getTypeWidth(TI.getWIntType()), TI, Builder); 781 if (TI.hasInt128Type()) 782 DefineTypeSizeof("__SIZEOF_INT128__", 128, TI, Builder); 783 784 DefineType("__INTMAX_TYPE__", TI.getIntMaxType(), Builder); 785 DefineFmt("__INTMAX", TI.getIntMaxType(), TI, Builder); 786 Builder.defineMacro("__INTMAX_C_SUFFIX__", 787 TI.getTypeConstantSuffix(TI.getIntMaxType())); 788 DefineType("__UINTMAX_TYPE__", TI.getUIntMaxType(), Builder); 789 DefineFmt("__UINTMAX", TI.getUIntMaxType(), TI, Builder); 790 Builder.defineMacro("__UINTMAX_C_SUFFIX__", 791 TI.getTypeConstantSuffix(TI.getUIntMaxType())); 792 DefineTypeWidth("__INTMAX_WIDTH__", TI.getIntMaxType(), TI, Builder); 793 DefineType("__PTRDIFF_TYPE__", TI.getPtrDiffType(0), Builder); 794 DefineFmt("__PTRDIFF", TI.getPtrDiffType(0), TI, Builder); 795 DefineTypeWidth("__PTRDIFF_WIDTH__", TI.getPtrDiffType(0), TI, Builder); 796 DefineType("__INTPTR_TYPE__", TI.getIntPtrType(), Builder); 797 DefineFmt("__INTPTR", TI.getIntPtrType(), TI, Builder); 798 DefineTypeWidth("__INTPTR_WIDTH__", TI.getIntPtrType(), TI, Builder); 799 DefineType("__SIZE_TYPE__", TI.getSizeType(), Builder); 800 DefineFmt("__SIZE", TI.getSizeType(), TI, Builder); 801 DefineTypeWidth("__SIZE_WIDTH__", TI.getSizeType(), TI, Builder); 802 DefineType("__WCHAR_TYPE__", TI.getWCharType(), Builder); 803 DefineTypeWidth("__WCHAR_WIDTH__", TI.getWCharType(), TI, Builder); 804 DefineType("__WINT_TYPE__", TI.getWIntType(), Builder); 805 DefineTypeWidth("__WINT_WIDTH__", TI.getWIntType(), TI, Builder); 806 DefineTypeWidth("__SIG_ATOMIC_WIDTH__", TI.getSigAtomicType(), TI, Builder); 807 DefineTypeSize("__SIG_ATOMIC_MAX__", TI.getSigAtomicType(), TI, Builder); 808 DefineType("__CHAR16_TYPE__", TI.getChar16Type(), Builder); 809 DefineType("__CHAR32_TYPE__", TI.getChar32Type(), Builder); 810 811 DefineTypeWidth("__UINTMAX_WIDTH__", TI.getUIntMaxType(), TI, Builder); 812 DefineType("__UINTPTR_TYPE__", TI.getUIntPtrType(), Builder); 813 DefineFmt("__UINTPTR", TI.getUIntPtrType(), TI, Builder); 814 DefineTypeWidth("__UINTPTR_WIDTH__", TI.getUIntPtrType(), TI, Builder); 815 816 DefineFloatMacros(Builder, "FLT16", &TI.getHalfFormat(), "F16"); 817 DefineFloatMacros(Builder, "FLT", &TI.getFloatFormat(), "F"); 818 DefineFloatMacros(Builder, "DBL", &TI.getDoubleFormat(), ""); 819 DefineFloatMacros(Builder, "LDBL", &TI.getLongDoubleFormat(), "L"); 820 821 // Define a __POINTER_WIDTH__ macro for stdint.h. 822 Builder.defineMacro("__POINTER_WIDTH__", 823 Twine((int)TI.getPointerWidth(0))); 824 825 // Define __BIGGEST_ALIGNMENT__ to be compatible with gcc. 826 Builder.defineMacro("__BIGGEST_ALIGNMENT__", 827 Twine(TI.getSuitableAlign() / TI.getCharWidth()) ); 828 829 if (!LangOpts.CharIsSigned) 830 Builder.defineMacro("__CHAR_UNSIGNED__"); 831 832 if (!TargetInfo::isTypeSigned(TI.getWCharType())) 833 Builder.defineMacro("__WCHAR_UNSIGNED__"); 834 835 if (!TargetInfo::isTypeSigned(TI.getWIntType())) 836 Builder.defineMacro("__WINT_UNSIGNED__"); 837 838 // Define exact-width integer types for stdint.h 839 DefineExactWidthIntType(TargetInfo::SignedChar, TI, Builder); 840 841 if (TI.getShortWidth() > TI.getCharWidth()) 842 DefineExactWidthIntType(TargetInfo::SignedShort, TI, Builder); 843 844 if (TI.getIntWidth() > TI.getShortWidth()) 845 DefineExactWidthIntType(TargetInfo::SignedInt, TI, Builder); 846 847 if (TI.getLongWidth() > TI.getIntWidth()) 848 DefineExactWidthIntType(TargetInfo::SignedLong, TI, Builder); 849 850 if (TI.getLongLongWidth() > TI.getLongWidth()) 851 DefineExactWidthIntType(TargetInfo::SignedLongLong, TI, Builder); 852 853 DefineExactWidthIntType(TargetInfo::UnsignedChar, TI, Builder); 854 DefineExactWidthIntTypeSize(TargetInfo::UnsignedChar, TI, Builder); 855 DefineExactWidthIntTypeSize(TargetInfo::SignedChar, TI, Builder); 856 857 if (TI.getShortWidth() > TI.getCharWidth()) { 858 DefineExactWidthIntType(TargetInfo::UnsignedShort, TI, Builder); 859 DefineExactWidthIntTypeSize(TargetInfo::UnsignedShort, TI, Builder); 860 DefineExactWidthIntTypeSize(TargetInfo::SignedShort, TI, Builder); 861 } 862 863 if (TI.getIntWidth() > TI.getShortWidth()) { 864 DefineExactWidthIntType(TargetInfo::UnsignedInt, TI, Builder); 865 DefineExactWidthIntTypeSize(TargetInfo::UnsignedInt, TI, Builder); 866 DefineExactWidthIntTypeSize(TargetInfo::SignedInt, TI, Builder); 867 } 868 869 if (TI.getLongWidth() > TI.getIntWidth()) { 870 DefineExactWidthIntType(TargetInfo::UnsignedLong, TI, Builder); 871 DefineExactWidthIntTypeSize(TargetInfo::UnsignedLong, TI, Builder); 872 DefineExactWidthIntTypeSize(TargetInfo::SignedLong, TI, Builder); 873 } 874 875 if (TI.getLongLongWidth() > TI.getLongWidth()) { 876 DefineExactWidthIntType(TargetInfo::UnsignedLongLong, TI, Builder); 877 DefineExactWidthIntTypeSize(TargetInfo::UnsignedLongLong, TI, Builder); 878 DefineExactWidthIntTypeSize(TargetInfo::SignedLongLong, TI, Builder); 879 } 880 881 DefineLeastWidthIntType(8, true, TI, Builder); 882 DefineLeastWidthIntType(8, false, TI, Builder); 883 DefineLeastWidthIntType(16, true, TI, Builder); 884 DefineLeastWidthIntType(16, false, TI, Builder); 885 DefineLeastWidthIntType(32, true, TI, Builder); 886 DefineLeastWidthIntType(32, false, TI, Builder); 887 DefineLeastWidthIntType(64, true, TI, Builder); 888 DefineLeastWidthIntType(64, false, TI, Builder); 889 890 DefineFastIntType(8, true, TI, Builder); 891 DefineFastIntType(8, false, TI, Builder); 892 DefineFastIntType(16, true, TI, Builder); 893 DefineFastIntType(16, false, TI, Builder); 894 DefineFastIntType(32, true, TI, Builder); 895 DefineFastIntType(32, false, TI, Builder); 896 DefineFastIntType(64, true, TI, Builder); 897 DefineFastIntType(64, false, TI, Builder); 898 899 char UserLabelPrefix[2] = {TI.getDataLayout().getGlobalPrefix(), 0}; 900 Builder.defineMacro("__USER_LABEL_PREFIX__", UserLabelPrefix); 901 902 if (LangOpts.FastMath || LangOpts.FiniteMathOnly) 903 Builder.defineMacro("__FINITE_MATH_ONLY__", "1"); 904 else 905 Builder.defineMacro("__FINITE_MATH_ONLY__", "0"); 906 907 if (!LangOpts.MSVCCompat) { 908 if (LangOpts.GNUInline || LangOpts.CPlusPlus) 909 Builder.defineMacro("__GNUC_GNU_INLINE__"); 910 else 911 Builder.defineMacro("__GNUC_STDC_INLINE__"); 912 913 // The value written by __atomic_test_and_set. 914 // FIXME: This is target-dependent. 915 Builder.defineMacro("__GCC_ATOMIC_TEST_AND_SET_TRUEVAL", "1"); 916 } 917 918 auto addLockFreeMacros = [&](const llvm::Twine &Prefix) { 919 // Used by libc++ and libstdc++ to implement ATOMIC_<foo>_LOCK_FREE. 920 unsigned InlineWidthBits = TI.getMaxAtomicInlineWidth(); 921#define DEFINE_LOCK_FREE_MACRO(TYPE, Type) \ 922 Builder.defineMacro(Prefix + #TYPE "_LOCK_FREE", \ 923 getLockFreeValue(TI.get##Type##Width(), \ 924 TI.get##Type##Align(), \ 925 InlineWidthBits)); 926 DEFINE_LOCK_FREE_MACRO(BOOL, Bool); 927 DEFINE_LOCK_FREE_MACRO(CHAR, Char); 928 DEFINE_LOCK_FREE_MACRO(CHAR16_T, Char16); 929 DEFINE_LOCK_FREE_MACRO(CHAR32_T, Char32); 930 DEFINE_LOCK_FREE_MACRO(WCHAR_T, WChar); 931 DEFINE_LOCK_FREE_MACRO(SHORT, Short); 932 DEFINE_LOCK_FREE_MACRO(INT, Int); 933 DEFINE_LOCK_FREE_MACRO(LONG, Long); 934 DEFINE_LOCK_FREE_MACRO(LLONG, LongLong); 935 Builder.defineMacro(Prefix + "POINTER_LOCK_FREE", 936 getLockFreeValue(TI.getPointerWidth(0), 937 TI.getPointerAlign(0), 938 InlineWidthBits)); 939#undef DEFINE_LOCK_FREE_MACRO 940 }; 941 addLockFreeMacros("__CLANG_ATOMIC_"); 942 if (!LangOpts.MSVCCompat) 943 addLockFreeMacros("__GCC_ATOMIC_"); 944 945 if (LangOpts.NoInlineDefine) 946 Builder.defineMacro("__NO_INLINE__"); 947 948 if (unsigned PICLevel = LangOpts.PICLevel) { 949 Builder.defineMacro("__PIC__", Twine(PICLevel)); 950 Builder.defineMacro("__pic__", Twine(PICLevel)); 951 if (LangOpts.PIE) { 952 Builder.defineMacro("__PIE__", Twine(PICLevel)); 953 Builder.defineMacro("__pie__", Twine(PICLevel)); 954 } 955 } 956 957 // Macros to control C99 numerics and <float.h> 958 Builder.defineMacro("__FLT_EVAL_METHOD__", Twine(TI.getFloatEvalMethod())); 959 Builder.defineMacro("__FLT_RADIX__", "2"); 960 Builder.defineMacro("__DECIMAL_DIG__", "__LDBL_DECIMAL_DIG__"); 961 962 if (LangOpts.getStackProtector() == LangOptions::SSPOn) 963 Builder.defineMacro("__SSP__"); 964 else if (LangOpts.getStackProtector() == LangOptions::SSPStrong) 965 Builder.defineMacro("__SSP_STRONG__", "2"); 966 else if (LangOpts.getStackProtector() == LangOptions::SSPReq) 967 Builder.defineMacro("__SSP_ALL__", "3"); 968 969 // Define a macro that exists only when using the static analyzer. 970 if (FEOpts.ProgramAction == frontend::RunAnalysis) 971 Builder.defineMacro("__clang_analyzer__"); 972 973 if (LangOpts.FastRelaxedMath) 974 Builder.defineMacro("__FAST_RELAXED_MATH__"); 975 976 if (FEOpts.ProgramAction == frontend::RewriteObjC || 977 LangOpts.getGC() != LangOptions::NonGC) { 978 Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))"); 979 Builder.defineMacro("__strong", "__attribute__((objc_gc(strong)))"); 980 Builder.defineMacro("__autoreleasing", ""); 981 Builder.defineMacro("__unsafe_unretained", ""); 982 } else if (LangOpts.ObjC1) { 983 Builder.defineMacro("__weak", "__attribute__((objc_ownership(weak)))"); 984 Builder.defineMacro("__strong", "__attribute__((objc_ownership(strong)))"); 985 Builder.defineMacro("__autoreleasing", 986 "__attribute__((objc_ownership(autoreleasing)))"); 987 Builder.defineMacro("__unsafe_unretained", 988 "__attribute__((objc_ownership(none)))"); 989 } 990 991 // On Darwin, there are __double_underscored variants of the type 992 // nullability qualifiers. 993 if (TI.getTriple().isOSDarwin()) { 994 Builder.defineMacro("__nonnull", "_Nonnull"); 995 Builder.defineMacro("__null_unspecified", "_Null_unspecified"); 996 Builder.defineMacro("__nullable", "_Nullable"); 997 } 998 999 // Add a macro to differentiate between regular iOS/tvOS/watchOS targets and 1000 // the corresponding simulator targets. 1001 if (TI.getTriple().isOSDarwin() && TI.getTriple().isSimulatorEnvironment()) 1002 Builder.defineMacro("__APPLE_EMBEDDED_SIMULATOR__", "1"); 1003 1004 // OpenMP definition 1005 // OpenMP 2.2: 1006 // In implementations that support a preprocessor, the _OPENMP 1007 // macro name is defined to have the decimal value yyyymm where 1008 // yyyy and mm are the year and the month designations of the 1009 // version of the OpenMP API that the implementation support. 1010 switch (LangOpts.OpenMP) { 1011 case 0: 1012 break; 1013 case 40: 1014 Builder.defineMacro("_OPENMP", "201307"); 1015 break; 1016 case 45: 1017 Builder.defineMacro("_OPENMP", "201511"); 1018 break; 1019 default: 1020 // Default version is OpenMP 3.1, in Simd only mode - 4.5 1021 Builder.defineMacro("_OPENMP", LangOpts.OpenMPSimd ? "201511" : "201107"); 1022 break; 1023 } 1024 1025 // CUDA device path compilaton 1026 if (LangOpts.CUDAIsDevice) { 1027 // The CUDA_ARCH value is set for the GPU target specified in the NVPTX 1028 // backend's target defines. 1029 Builder.defineMacro("__CUDA_ARCH__"); 1030 } 1031 1032 // We need to communicate this to our CUDA header wrapper, which in turn 1033 // informs the proper CUDA headers of this choice. 1034 if (LangOpts.CUDADeviceApproxTranscendentals || LangOpts.FastMath) { 1035 Builder.defineMacro("__CLANG_CUDA_APPROX_TRANSCENDENTALS__"); 1036 } 1037 1038 // OpenCL definitions. 1039 if (LangOpts.OpenCL) { 1040#define OPENCLEXT(Ext) \ 1041 if (TI.getSupportedOpenCLOpts().isSupported(#Ext, \ 1042 LangOpts.OpenCLVersion)) \ 1043 Builder.defineMacro(#Ext); 1044#include "clang/Basic/OpenCLExtensions.def" 1045 1046 auto Arch = TI.getTriple().getArch(); 1047 if (Arch == llvm::Triple::spir || Arch == llvm::Triple::spir64) 1048 Builder.defineMacro("__IMAGE_SUPPORT__"); 1049 } 1050 1051 if (TI.hasInt128Type() && LangOpts.CPlusPlus && LangOpts.GNUMode) { 1052 // For each extended integer type, g++ defines a macro mapping the 1053 // index of the type (0 in this case) in some list of extended types 1054 // to the type. 1055 Builder.defineMacro("__GLIBCXX_TYPE_INT_N_0", "__int128"); 1056 Builder.defineMacro("__GLIBCXX_BITSIZE_INT_N_0", "128"); 1057 } 1058 1059 // Get other target #defines. 1060 TI.getTargetDefines(LangOpts, Builder); 1061} 1062 1063/// InitializePreprocessor - Initialize the preprocessor getting it and the 1064/// environment ready to process a single file. This returns true on error. 1065/// 1066void clang::InitializePreprocessor( 1067 Preprocessor &PP, const PreprocessorOptions &InitOpts, 1068 const PCHContainerReader &PCHContainerRdr, 1069 const FrontendOptions &FEOpts) { 1070 const LangOptions &LangOpts = PP.getLangOpts(); 1071 std::string PredefineBuffer; 1072 PredefineBuffer.reserve(4080); 1073 llvm::raw_string_ostream Predefines(PredefineBuffer); 1074 MacroBuilder Builder(Predefines); 1075 1076 // Emit line markers for various builtin sections of the file. We don't do 1077 // this in asm preprocessor mode, because "# 4" is not a line marker directive 1078 // in this mode. 1079 if (!PP.getLangOpts().AsmPreprocessor) 1080 Builder.append("# 1 \"<built-in>\" 3"); 1081 1082 // Install things like __POWERPC__, __GNUC__, etc into the macro table. 1083 if (InitOpts.UsePredefines) { 1084 // FIXME: This will create multiple definitions for most of the predefined 1085 // macros. This is not the right way to handle this. 1086 if ((LangOpts.CUDA || LangOpts.OpenMPIsDevice) && PP.getAuxTargetInfo()) 1087 InitializePredefinedMacros(*PP.getAuxTargetInfo(), LangOpts, FEOpts, 1088 Builder); 1089 1090 InitializePredefinedMacros(PP.getTargetInfo(), LangOpts, FEOpts, Builder); 1091 1092 // Install definitions to make Objective-C++ ARC work well with various 1093 // C++ Standard Library implementations. 1094 if (LangOpts.ObjC1 && LangOpts.CPlusPlus && 1095 (LangOpts.ObjCAutoRefCount || LangOpts.ObjCWeak)) { 1096 switch (InitOpts.ObjCXXARCStandardLibrary) { 1097 case ARCXX_nolib: 1098 case ARCXX_libcxx: 1099 break; 1100 1101 case ARCXX_libstdcxx: 1102 AddObjCXXARCLibstdcxxDefines(LangOpts, Builder); 1103 break; 1104 } 1105 } 1106 } 1107 1108 // Even with predefines off, some macros are still predefined. 1109 // These should all be defined in the preprocessor according to the 1110 // current language configuration. 1111 InitializeStandardPredefinedMacros(PP.getTargetInfo(), PP.getLangOpts(), 1112 FEOpts, Builder); 1113 1114 // Add on the predefines from the driver. Wrap in a #line directive to report 1115 // that they come from the command line. 1116 if (!PP.getLangOpts().AsmPreprocessor) 1117 Builder.append("# 1 \"<command line>\" 1"); 1118 1119 // Process #define's and #undef's in the order they are given. 1120 for (unsigned i = 0, e = InitOpts.Macros.size(); i != e; ++i) { 1121 if (InitOpts.Macros[i].second) // isUndef 1122 Builder.undefineMacro(InitOpts.Macros[i].first); 1123 else 1124 DefineBuiltinMacro(Builder, InitOpts.Macros[i].first, 1125 PP.getDiagnostics()); 1126 } 1127 1128 // Exit the command line and go back to <built-in> (2 is LC_LEAVE). 1129 if (!PP.getLangOpts().AsmPreprocessor) 1130 Builder.append("# 1 \"<built-in>\" 2"); 1131 1132 // If -imacros are specified, include them now. These are processed before 1133 // any -include directives. 1134 for (unsigned i = 0, e = InitOpts.MacroIncludes.size(); i != e; ++i) 1135 AddImplicitIncludeMacros(Builder, InitOpts.MacroIncludes[i]); 1136 1137 // Process -include-pch/-include-pth directives. 1138 if (!InitOpts.ImplicitPCHInclude.empty()) 1139 AddImplicitIncludePCH(Builder, PP, PCHContainerRdr, 1140 InitOpts.ImplicitPCHInclude); 1141 if (!InitOpts.ImplicitPTHInclude.empty()) 1142 AddImplicitIncludePTH(Builder, PP, InitOpts.ImplicitPTHInclude); 1143 1144 // Process -include directives. 1145 for (unsigned i = 0, e = InitOpts.Includes.size(); i != e; ++i) { 1146 const std::string &Path = InitOpts.Includes[i]; 1147 AddImplicitInclude(Builder, Path); 1148 } 1149 1150 // Instruct the preprocessor to skip the preamble. 1151 PP.setSkipMainFilePreamble(InitOpts.PrecompiledPreambleBytes.first, 1152 InitOpts.PrecompiledPreambleBytes.second); 1153 1154 // Copy PredefinedBuffer into the Preprocessor. 1155 PP.setPredefines(Predefines.str()); 1156} 1157