1 //===--- InitPreprocessor.cpp - PP initialization code. ---------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file implements the clang::InitializePreprocessor function. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "clang/Basic/FileManager.h" 14 #include "clang/Basic/MacroBuilder.h" 15 #include "clang/Basic/SourceManager.h" 16 #include "clang/Basic/SyncScope.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/Preprocessor.h" 24 #include "clang/Lex/PreprocessorOptions.h" 25 #include "clang/Serialization/ASTReader.h" 26 #include "llvm/ADT/APFloat.h" 27 #include "llvm/IR/DataLayout.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 /// Add an implicit \#include using the original file used to generate 79 /// a PCH file. 80 static void AddImplicitIncludePCH(MacroBuilder &Builder, Preprocessor &PP, 81 const PCHContainerReader &PCHContainerRdr, 82 StringRef ImplicitIncludePCH) { 83 std::string OriginalFile = ASTReader::getOriginalSourceFile( 84 std::string(ImplicitIncludePCH), PP.getFileManager(), PCHContainerRdr, 85 PP.getDiagnostics()); 86 if (OriginalFile.empty()) 87 return; 88 89 AddImplicitInclude(Builder, OriginalFile); 90 } 91 92 /// PickFP - This is used to pick a value based on the FP semantics of the 93 /// specified FP model. 94 template <typename T> 95 static T PickFP(const llvm::fltSemantics *Sem, T IEEEHalfVal, T IEEESingleVal, 96 T IEEEDoubleVal, T X87DoubleExtendedVal, T PPCDoubleDoubleVal, 97 T IEEEQuadVal) { 98 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEhalf()) 99 return IEEEHalfVal; 100 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEsingle()) 101 return IEEESingleVal; 102 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEdouble()) 103 return IEEEDoubleVal; 104 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::x87DoubleExtended()) 105 return X87DoubleExtendedVal; 106 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::PPCDoubleDouble()) 107 return PPCDoubleDoubleVal; 108 assert(Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEquad()); 109 return IEEEQuadVal; 110 } 111 112 static void DefineFloatMacros(MacroBuilder &Builder, StringRef Prefix, 113 const llvm::fltSemantics *Sem, StringRef Ext) { 114 const char *DenormMin, *Epsilon, *Max, *Min; 115 DenormMin = PickFP(Sem, "5.9604644775390625e-8", "1.40129846e-45", 116 "4.9406564584124654e-324", "3.64519953188247460253e-4951", 117 "4.94065645841246544176568792868221e-324", 118 "6.47517511943802511092443895822764655e-4966"); 119 int Digits = PickFP(Sem, 3, 6, 15, 18, 31, 33); 120 int DecimalDigits = PickFP(Sem, 5, 9, 17, 21, 33, 36); 121 Epsilon = PickFP(Sem, "9.765625e-4", "1.19209290e-7", 122 "2.2204460492503131e-16", "1.08420217248550443401e-19", 123 "4.94065645841246544176568792868221e-324", 124 "1.92592994438723585305597794258492732e-34"); 125 int MantissaDigits = PickFP(Sem, 11, 24, 53, 64, 106, 113); 126 int Min10Exp = PickFP(Sem, -4, -37, -307, -4931, -291, -4931); 127 int Max10Exp = PickFP(Sem, 4, 38, 308, 4932, 308, 4932); 128 int MinExp = PickFP(Sem, -13, -125, -1021, -16381, -968, -16381); 129 int MaxExp = PickFP(Sem, 16, 128, 1024, 16384, 1024, 16384); 130 Min = PickFP(Sem, "6.103515625e-5", "1.17549435e-38", "2.2250738585072014e-308", 131 "3.36210314311209350626e-4932", 132 "2.00416836000897277799610805135016e-292", 133 "3.36210314311209350626267781732175260e-4932"); 134 Max = PickFP(Sem, "6.5504e+4", "3.40282347e+38", "1.7976931348623157e+308", 135 "1.18973149535723176502e+4932", 136 "1.79769313486231580793728971405301e+308", 137 "1.18973149535723176508575932662800702e+4932"); 138 139 SmallString<32> DefPrefix; 140 DefPrefix = "__"; 141 DefPrefix += Prefix; 142 DefPrefix += "_"; 143 144 Builder.defineMacro(DefPrefix + "DENORM_MIN__", Twine(DenormMin)+Ext); 145 Builder.defineMacro(DefPrefix + "HAS_DENORM__"); 146 Builder.defineMacro(DefPrefix + "DIG__", Twine(Digits)); 147 Builder.defineMacro(DefPrefix + "DECIMAL_DIG__", Twine(DecimalDigits)); 148 Builder.defineMacro(DefPrefix + "EPSILON__", Twine(Epsilon)+Ext); 149 Builder.defineMacro(DefPrefix + "HAS_INFINITY__"); 150 Builder.defineMacro(DefPrefix + "HAS_QUIET_NAN__"); 151 Builder.defineMacro(DefPrefix + "MANT_DIG__", Twine(MantissaDigits)); 152 153 Builder.defineMacro(DefPrefix + "MAX_10_EXP__", Twine(Max10Exp)); 154 Builder.defineMacro(DefPrefix + "MAX_EXP__", Twine(MaxExp)); 155 Builder.defineMacro(DefPrefix + "MAX__", Twine(Max)+Ext); 156 157 Builder.defineMacro(DefPrefix + "MIN_10_EXP__","("+Twine(Min10Exp)+")"); 158 Builder.defineMacro(DefPrefix + "MIN_EXP__", "("+Twine(MinExp)+")"); 159 Builder.defineMacro(DefPrefix + "MIN__", Twine(Min)+Ext); 160 } 161 162 163 /// DefineTypeSize - Emit a macro to the predefines buffer that declares a macro 164 /// named MacroName with the max value for a type with width 'TypeWidth' a 165 /// signedness of 'isSigned' and with a value suffix of 'ValSuffix' (e.g. LL). 166 static void DefineTypeSize(const Twine &MacroName, unsigned TypeWidth, 167 StringRef ValSuffix, bool isSigned, 168 MacroBuilder &Builder) { 169 llvm::APInt MaxVal = isSigned ? llvm::APInt::getSignedMaxValue(TypeWidth) 170 : llvm::APInt::getMaxValue(TypeWidth); 171 Builder.defineMacro(MacroName, MaxVal.toString(10, isSigned) + ValSuffix); 172 } 173 174 /// DefineTypeSize - An overloaded helper that uses TargetInfo to determine 175 /// the width, suffix, and signedness of the given type 176 static void DefineTypeSize(const Twine &MacroName, TargetInfo::IntType Ty, 177 const TargetInfo &TI, MacroBuilder &Builder) { 178 DefineTypeSize(MacroName, TI.getTypeWidth(Ty), TI.getTypeConstantSuffix(Ty), 179 TI.isTypeSigned(Ty), Builder); 180 } 181 182 static void DefineFmt(const Twine &Prefix, TargetInfo::IntType Ty, 183 const TargetInfo &TI, MacroBuilder &Builder) { 184 bool IsSigned = TI.isTypeSigned(Ty); 185 StringRef FmtModifier = TI.getTypeFormatModifier(Ty); 186 for (const char *Fmt = IsSigned ? "di" : "ouxX"; *Fmt; ++Fmt) { 187 Builder.defineMacro(Prefix + "_FMT" + Twine(*Fmt) + "__", 188 Twine("\"") + FmtModifier + Twine(*Fmt) + "\""); 189 } 190 } 191 192 static void DefineType(const Twine &MacroName, TargetInfo::IntType Ty, 193 MacroBuilder &Builder) { 194 Builder.defineMacro(MacroName, TargetInfo::getTypeName(Ty)); 195 } 196 197 static void DefineTypeWidth(StringRef MacroName, TargetInfo::IntType Ty, 198 const TargetInfo &TI, MacroBuilder &Builder) { 199 Builder.defineMacro(MacroName, Twine(TI.getTypeWidth(Ty))); 200 } 201 202 static void DefineTypeSizeof(StringRef MacroName, unsigned BitWidth, 203 const TargetInfo &TI, MacroBuilder &Builder) { 204 Builder.defineMacro(MacroName, 205 Twine(BitWidth / TI.getCharWidth())); 206 } 207 208 static void DefineExactWidthIntType(TargetInfo::IntType Ty, 209 const TargetInfo &TI, 210 MacroBuilder &Builder) { 211 int TypeWidth = TI.getTypeWidth(Ty); 212 bool IsSigned = TI.isTypeSigned(Ty); 213 214 // Use the target specified int64 type, when appropriate, so that [u]int64_t 215 // ends up being defined in terms of the correct type. 216 if (TypeWidth == 64) 217 Ty = IsSigned ? TI.getInt64Type() : TI.getUInt64Type(); 218 219 const char *Prefix = IsSigned ? "__INT" : "__UINT"; 220 221 DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder); 222 DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder); 223 224 StringRef ConstSuffix(TI.getTypeConstantSuffix(Ty)); 225 Builder.defineMacro(Prefix + Twine(TypeWidth) + "_C_SUFFIX__", ConstSuffix); 226 } 227 228 static void DefineExactWidthIntTypeSize(TargetInfo::IntType Ty, 229 const TargetInfo &TI, 230 MacroBuilder &Builder) { 231 int TypeWidth = TI.getTypeWidth(Ty); 232 bool IsSigned = TI.isTypeSigned(Ty); 233 234 // Use the target specified int64 type, when appropriate, so that [u]int64_t 235 // ends up being defined in terms of the correct type. 236 if (TypeWidth == 64) 237 Ty = IsSigned ? TI.getInt64Type() : TI.getUInt64Type(); 238 239 const char *Prefix = IsSigned ? "__INT" : "__UINT"; 240 DefineTypeSize(Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder); 241 } 242 243 static void DefineLeastWidthIntType(unsigned TypeWidth, bool IsSigned, 244 const TargetInfo &TI, 245 MacroBuilder &Builder) { 246 TargetInfo::IntType Ty = TI.getLeastIntTypeByWidth(TypeWidth, IsSigned); 247 if (Ty == TargetInfo::NoInt) 248 return; 249 250 const char *Prefix = IsSigned ? "__INT_LEAST" : "__UINT_LEAST"; 251 DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder); 252 DefineTypeSize(Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder); 253 DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder); 254 } 255 256 static void DefineFastIntType(unsigned TypeWidth, bool IsSigned, 257 const TargetInfo &TI, MacroBuilder &Builder) { 258 // stdint.h currently defines the fast int types as equivalent to the least 259 // types. 260 TargetInfo::IntType Ty = TI.getLeastIntTypeByWidth(TypeWidth, IsSigned); 261 if (Ty == TargetInfo::NoInt) 262 return; 263 264 const char *Prefix = IsSigned ? "__INT_FAST" : "__UINT_FAST"; 265 DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder); 266 DefineTypeSize(Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder); 267 268 DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder); 269 } 270 271 272 /// Get the value the ATOMIC_*_LOCK_FREE macro should have for a type with 273 /// the specified properties. 274 static const char *getLockFreeValue(unsigned TypeWidth, unsigned TypeAlign, 275 unsigned InlineWidth) { 276 // Fully-aligned, power-of-2 sizes no larger than the inline 277 // width will be inlined as lock-free operations. 278 if (TypeWidth == TypeAlign && (TypeWidth & (TypeWidth - 1)) == 0 && 279 TypeWidth <= InlineWidth) 280 return "2"; // "always lock free" 281 // We cannot be certain what operations the lib calls might be 282 // able to implement as lock-free on future processors. 283 return "1"; // "sometimes lock free" 284 } 285 286 /// Add definitions required for a smooth interaction between 287 /// Objective-C++ automated reference counting and libstdc++ (4.2). 288 static void AddObjCXXARCLibstdcxxDefines(const LangOptions &LangOpts, 289 MacroBuilder &Builder) { 290 Builder.defineMacro("_GLIBCXX_PREDEFINED_OBJC_ARC_IS_SCALAR"); 291 292 std::string Result; 293 { 294 // Provide specializations for the __is_scalar type trait so that 295 // lifetime-qualified objects are not considered "scalar" types, which 296 // libstdc++ uses as an indicator of the presence of trivial copy, assign, 297 // default-construct, and destruct semantics (none of which hold for 298 // lifetime-qualified objects in ARC). 299 llvm::raw_string_ostream Out(Result); 300 301 Out << "namespace std {\n" 302 << "\n" 303 << "struct __true_type;\n" 304 << "struct __false_type;\n" 305 << "\n"; 306 307 Out << "template<typename _Tp> struct __is_scalar;\n" 308 << "\n"; 309 310 if (LangOpts.ObjCAutoRefCount) { 311 Out << "template<typename _Tp>\n" 312 << "struct __is_scalar<__attribute__((objc_ownership(strong))) _Tp> {\n" 313 << " enum { __value = 0 };\n" 314 << " typedef __false_type __type;\n" 315 << "};\n" 316 << "\n"; 317 } 318 319 if (LangOpts.ObjCWeak) { 320 Out << "template<typename _Tp>\n" 321 << "struct __is_scalar<__attribute__((objc_ownership(weak))) _Tp> {\n" 322 << " enum { __value = 0 };\n" 323 << " typedef __false_type __type;\n" 324 << "};\n" 325 << "\n"; 326 } 327 328 if (LangOpts.ObjCAutoRefCount) { 329 Out << "template<typename _Tp>\n" 330 << "struct __is_scalar<__attribute__((objc_ownership(autoreleasing)))" 331 << " _Tp> {\n" 332 << " enum { __value = 0 };\n" 333 << " typedef __false_type __type;\n" 334 << "};\n" 335 << "\n"; 336 } 337 338 Out << "}\n"; 339 } 340 Builder.append(Result); 341 } 342 343 static void InitializeStandardPredefinedMacros(const TargetInfo &TI, 344 const LangOptions &LangOpts, 345 const FrontendOptions &FEOpts, 346 MacroBuilder &Builder) { 347 // C++ [cpp.predefined]p1: 348 // The following macro names shall be defined by the implementation: 349 350 // -- __STDC__ 351 // [C++] Whether __STDC__ is predefined and if so, what its value is, 352 // are implementation-defined. 353 // (Removed in C++20.) 354 if (!LangOpts.MSVCCompat && !LangOpts.TraditionalCPP) 355 Builder.defineMacro("__STDC__"); 356 // -- __STDC_HOSTED__ 357 // The integer literal 1 if the implementation is a hosted 358 // implementation or the integer literal 0 if it is not. 359 if (LangOpts.Freestanding) 360 Builder.defineMacro("__STDC_HOSTED__", "0"); 361 else 362 Builder.defineMacro("__STDC_HOSTED__"); 363 364 // -- __STDC_VERSION__ 365 // [C++] Whether __STDC_VERSION__ is predefined and if so, what its 366 // value is, are implementation-defined. 367 // (Removed in C++20.) 368 if (!LangOpts.CPlusPlus) { 369 if (LangOpts.C17) 370 Builder.defineMacro("__STDC_VERSION__", "201710L"); 371 else if (LangOpts.C11) 372 Builder.defineMacro("__STDC_VERSION__", "201112L"); 373 else if (LangOpts.C99) 374 Builder.defineMacro("__STDC_VERSION__", "199901L"); 375 else if (!LangOpts.GNUMode && LangOpts.Digraphs) 376 Builder.defineMacro("__STDC_VERSION__", "199409L"); 377 } else { 378 // -- __cplusplus 379 // FIXME: Use correct value for C++23. 380 if (LangOpts.CPlusPlus2b) 381 Builder.defineMacro("__cplusplus", "202101L"); 382 // [C++20] The integer literal 202002L. 383 else if (LangOpts.CPlusPlus20) 384 Builder.defineMacro("__cplusplus", "202002L"); 385 // [C++17] The integer literal 201703L. 386 else if (LangOpts.CPlusPlus17) 387 Builder.defineMacro("__cplusplus", "201703L"); 388 // [C++14] The name __cplusplus is defined to the value 201402L when 389 // compiling a C++ translation unit. 390 else if (LangOpts.CPlusPlus14) 391 Builder.defineMacro("__cplusplus", "201402L"); 392 // [C++11] The name __cplusplus is defined to the value 201103L when 393 // compiling a C++ translation unit. 394 else if (LangOpts.CPlusPlus11) 395 Builder.defineMacro("__cplusplus", "201103L"); 396 // [C++03] The name __cplusplus is defined to the value 199711L when 397 // compiling a C++ translation unit. 398 else 399 Builder.defineMacro("__cplusplus", "199711L"); 400 401 // -- __STDCPP_DEFAULT_NEW_ALIGNMENT__ 402 // [C++17] An integer literal of type std::size_t whose value is the 403 // alignment guaranteed by a call to operator new(std::size_t) 404 // 405 // We provide this in all language modes, since it seems generally useful. 406 Builder.defineMacro("__STDCPP_DEFAULT_NEW_ALIGNMENT__", 407 Twine(TI.getNewAlign() / TI.getCharWidth()) + 408 TI.getTypeConstantSuffix(TI.getSizeType())); 409 410 // -- __STDCPP_THREADS__ 411 // Defined, and has the value integer literal 1, if and only if a 412 // program can have more than one thread of execution. 413 if (LangOpts.getThreadModel() == LangOptions::ThreadModelKind::POSIX) 414 Builder.defineMacro("__STDCPP_THREADS__", "1"); 415 } 416 417 // In C11 these are environment macros. In C++11 they are only defined 418 // as part of <cuchar>. To prevent breakage when mixing C and C++ 419 // code, define these macros unconditionally. We can define them 420 // unconditionally, as Clang always uses UTF-16 and UTF-32 for 16-bit 421 // and 32-bit character literals. 422 Builder.defineMacro("__STDC_UTF_16__", "1"); 423 Builder.defineMacro("__STDC_UTF_32__", "1"); 424 425 if (LangOpts.ObjC) 426 Builder.defineMacro("__OBJC__"); 427 428 // OpenCL v1.0/1.1 s6.9, v1.2/2.0 s6.10: Preprocessor Directives and Macros. 429 if (LangOpts.OpenCL) { 430 if (LangOpts.CPlusPlus) { 431 if (LangOpts.OpenCLCPlusPlusVersion == 100) 432 Builder.defineMacro("__OPENCL_CPP_VERSION__", "100"); 433 else 434 llvm_unreachable("Unsupported C++ version for OpenCL"); 435 Builder.defineMacro("__CL_CPP_VERSION_1_0__", "100"); 436 } else { 437 // OpenCL v1.0 and v1.1 do not have a predefined macro to indicate the 438 // language standard with which the program is compiled. __OPENCL_VERSION__ 439 // is for the OpenCL version supported by the OpenCL device, which is not 440 // necessarily the language standard with which the program is compiled. 441 // A shared OpenCL header file requires a macro to indicate the language 442 // standard. As a workaround, __OPENCL_C_VERSION__ is defined for 443 // OpenCL v1.0 and v1.1. 444 switch (LangOpts.OpenCLVersion) { 445 case 100: 446 Builder.defineMacro("__OPENCL_C_VERSION__", "100"); 447 break; 448 case 110: 449 Builder.defineMacro("__OPENCL_C_VERSION__", "110"); 450 break; 451 case 120: 452 Builder.defineMacro("__OPENCL_C_VERSION__", "120"); 453 break; 454 case 200: 455 Builder.defineMacro("__OPENCL_C_VERSION__", "200"); 456 break; 457 case 300: 458 Builder.defineMacro("__OPENCL_C_VERSION__", "300"); 459 break; 460 default: 461 llvm_unreachable("Unsupported OpenCL version"); 462 } 463 } 464 Builder.defineMacro("CL_VERSION_1_0", "100"); 465 Builder.defineMacro("CL_VERSION_1_1", "110"); 466 Builder.defineMacro("CL_VERSION_1_2", "120"); 467 Builder.defineMacro("CL_VERSION_2_0", "200"); 468 Builder.defineMacro("CL_VERSION_3_0", "300"); 469 470 if (TI.isLittleEndian()) 471 Builder.defineMacro("__ENDIAN_LITTLE__"); 472 473 if (LangOpts.FastRelaxedMath) 474 Builder.defineMacro("__FAST_RELAXED_MATH__"); 475 } 476 477 if (LangOpts.SYCLIsDevice || LangOpts.SYCLIsHost) { 478 // SYCL Version is set to a value when building SYCL applications 479 if (LangOpts.getSYCLVersion() == LangOptions::SYCL_2017) 480 Builder.defineMacro("CL_SYCL_LANGUAGE_VERSION", "121"); 481 } 482 483 // Not "standard" per se, but available even with the -undef flag. 484 if (LangOpts.AsmPreprocessor) 485 Builder.defineMacro("__ASSEMBLER__"); 486 if (LangOpts.CUDA && !LangOpts.HIP) 487 Builder.defineMacro("__CUDA__"); 488 if (LangOpts.HIP) { 489 Builder.defineMacro("__HIP__"); 490 Builder.defineMacro("__HIPCC__"); 491 if (LangOpts.CUDAIsDevice) 492 Builder.defineMacro("__HIP_DEVICE_COMPILE__"); 493 } 494 } 495 496 /// Initialize the predefined C++ language feature test macros defined in 497 /// ISO/IEC JTC1/SC22/WG21 (C++) SD-6: "SG10 Feature Test Recommendations". 498 static void InitializeCPlusPlusFeatureTestMacros(const LangOptions &LangOpts, 499 MacroBuilder &Builder) { 500 // C++98 features. 501 if (LangOpts.RTTI) 502 Builder.defineMacro("__cpp_rtti", "199711L"); 503 if (LangOpts.CXXExceptions) 504 Builder.defineMacro("__cpp_exceptions", "199711L"); 505 506 // C++11 features. 507 if (LangOpts.CPlusPlus11) { 508 Builder.defineMacro("__cpp_unicode_characters", "200704L"); 509 Builder.defineMacro("__cpp_raw_strings", "200710L"); 510 Builder.defineMacro("__cpp_unicode_literals", "200710L"); 511 Builder.defineMacro("__cpp_user_defined_literals", "200809L"); 512 Builder.defineMacro("__cpp_lambdas", "200907L"); 513 Builder.defineMacro("__cpp_constexpr", 514 LangOpts.CPlusPlus20 ? "201907L" : 515 LangOpts.CPlusPlus17 ? "201603L" : 516 LangOpts.CPlusPlus14 ? "201304L" : "200704"); 517 Builder.defineMacro("__cpp_constexpr_in_decltype", "201711L"); 518 Builder.defineMacro("__cpp_range_based_for", 519 LangOpts.CPlusPlus17 ? "201603L" : "200907"); 520 Builder.defineMacro("__cpp_static_assert", 521 LangOpts.CPlusPlus17 ? "201411L" : "200410"); 522 Builder.defineMacro("__cpp_decltype", "200707L"); 523 Builder.defineMacro("__cpp_attributes", "200809L"); 524 Builder.defineMacro("__cpp_rvalue_references", "200610L"); 525 Builder.defineMacro("__cpp_variadic_templates", "200704L"); 526 Builder.defineMacro("__cpp_initializer_lists", "200806L"); 527 Builder.defineMacro("__cpp_delegating_constructors", "200604L"); 528 Builder.defineMacro("__cpp_nsdmi", "200809L"); 529 Builder.defineMacro("__cpp_inheriting_constructors", "201511L"); 530 Builder.defineMacro("__cpp_ref_qualifiers", "200710L"); 531 Builder.defineMacro("__cpp_alias_templates", "200704L"); 532 } 533 if (LangOpts.ThreadsafeStatics) 534 Builder.defineMacro("__cpp_threadsafe_static_init", "200806L"); 535 536 // C++14 features. 537 if (LangOpts.CPlusPlus14) { 538 Builder.defineMacro("__cpp_binary_literals", "201304L"); 539 Builder.defineMacro("__cpp_digit_separators", "201309L"); 540 Builder.defineMacro("__cpp_init_captures", 541 LangOpts.CPlusPlus20 ? "201803L" : "201304L"); 542 Builder.defineMacro("__cpp_generic_lambdas", 543 LangOpts.CPlusPlus20 ? "201707L" : "201304L"); 544 Builder.defineMacro("__cpp_decltype_auto", "201304L"); 545 Builder.defineMacro("__cpp_return_type_deduction", "201304L"); 546 Builder.defineMacro("__cpp_aggregate_nsdmi", "201304L"); 547 Builder.defineMacro("__cpp_variable_templates", "201304L"); 548 } 549 if (LangOpts.SizedDeallocation) 550 Builder.defineMacro("__cpp_sized_deallocation", "201309L"); 551 552 // C++17 features. 553 if (LangOpts.CPlusPlus17) { 554 Builder.defineMacro("__cpp_hex_float", "201603L"); 555 Builder.defineMacro("__cpp_inline_variables", "201606L"); 556 Builder.defineMacro("__cpp_noexcept_function_type", "201510L"); 557 Builder.defineMacro("__cpp_capture_star_this", "201603L"); 558 Builder.defineMacro("__cpp_if_constexpr", "201606L"); 559 Builder.defineMacro("__cpp_deduction_guides", "201703L"); // (not latest) 560 Builder.defineMacro("__cpp_template_auto", "201606L"); // (old name) 561 Builder.defineMacro("__cpp_namespace_attributes", "201411L"); 562 Builder.defineMacro("__cpp_enumerator_attributes", "201411L"); 563 Builder.defineMacro("__cpp_nested_namespace_definitions", "201411L"); 564 Builder.defineMacro("__cpp_variadic_using", "201611L"); 565 Builder.defineMacro("__cpp_aggregate_bases", "201603L"); 566 Builder.defineMacro("__cpp_structured_bindings", "201606L"); 567 Builder.defineMacro("__cpp_nontype_template_args", 568 "201411L"); // (not latest) 569 Builder.defineMacro("__cpp_fold_expressions", "201603L"); 570 Builder.defineMacro("__cpp_guaranteed_copy_elision", "201606L"); 571 Builder.defineMacro("__cpp_nontype_template_parameter_auto", "201606L"); 572 } 573 if (LangOpts.AlignedAllocation && !LangOpts.AlignedAllocationUnavailable) 574 Builder.defineMacro("__cpp_aligned_new", "201606L"); 575 if (LangOpts.RelaxedTemplateTemplateArgs) 576 Builder.defineMacro("__cpp_template_template_args", "201611L"); 577 578 // C++20 features. 579 if (LangOpts.CPlusPlus20) { 580 //Builder.defineMacro("__cpp_aggregate_paren_init", "201902L"); 581 Builder.defineMacro("__cpp_concepts", "201907L"); 582 Builder.defineMacro("__cpp_conditional_explicit", "201806L"); 583 //Builder.defineMacro("__cpp_consteval", "201811L"); 584 Builder.defineMacro("__cpp_constexpr_dynamic_alloc", "201907L"); 585 Builder.defineMacro("__cpp_constinit", "201907L"); 586 //Builder.defineMacro("__cpp_coroutines", "201902L"); 587 Builder.defineMacro("__cpp_designated_initializers", "201707L"); 588 Builder.defineMacro("__cpp_impl_three_way_comparison", "201907L"); 589 //Builder.defineMacro("__cpp_modules", "201907L"); 590 //Builder.defineMacro("__cpp_using_enum", "201907L"); 591 } 592 // C++2b features. 593 if (LangOpts.CPlusPlus2b) 594 Builder.defineMacro("__cpp_size_t_suffix", "202011L"); 595 if (LangOpts.Char8) 596 Builder.defineMacro("__cpp_char8_t", "201811L"); 597 Builder.defineMacro("__cpp_impl_destroying_delete", "201806L"); 598 599 // TS features. 600 if (LangOpts.Coroutines) 601 Builder.defineMacro("__cpp_coroutines", "201703L"); 602 } 603 604 static void InitializePredefinedMacros(const TargetInfo &TI, 605 const LangOptions &LangOpts, 606 const FrontendOptions &FEOpts, 607 const PreprocessorOptions &PPOpts, 608 MacroBuilder &Builder) { 609 // Compiler version introspection macros. 610 Builder.defineMacro("__llvm__"); // LLVM Backend 611 Builder.defineMacro("__clang__"); // Clang Frontend 612 #define TOSTR2(X) #X 613 #define TOSTR(X) TOSTR2(X) 614 Builder.defineMacro("__clang_major__", TOSTR(CLANG_VERSION_MAJOR)); 615 Builder.defineMacro("__clang_minor__", TOSTR(CLANG_VERSION_MINOR)); 616 Builder.defineMacro("__clang_patchlevel__", TOSTR(CLANG_VERSION_PATCHLEVEL)); 617 #undef TOSTR 618 #undef TOSTR2 619 Builder.defineMacro("__clang_version__", 620 "\"" CLANG_VERSION_STRING " " 621 + getClangFullRepositoryVersion() + "\""); 622 623 if (LangOpts.GNUCVersion != 0) { 624 // Major, minor, patch, are given two decimal places each, so 4.2.1 becomes 625 // 40201. 626 unsigned GNUCMajor = LangOpts.GNUCVersion / 100 / 100; 627 unsigned GNUCMinor = LangOpts.GNUCVersion / 100 % 100; 628 unsigned GNUCPatch = LangOpts.GNUCVersion % 100; 629 Builder.defineMacro("__GNUC__", Twine(GNUCMajor)); 630 Builder.defineMacro("__GNUC_MINOR__", Twine(GNUCMinor)); 631 Builder.defineMacro("__GNUC_PATCHLEVEL__", Twine(GNUCPatch)); 632 Builder.defineMacro("__GXX_ABI_VERSION", "1002"); 633 634 if (LangOpts.CPlusPlus) { 635 Builder.defineMacro("__GNUG__", Twine(GNUCMajor)); 636 Builder.defineMacro("__GXX_WEAK__"); 637 } 638 } 639 640 // Define macros for the C11 / C++11 memory orderings 641 Builder.defineMacro("__ATOMIC_RELAXED", "0"); 642 Builder.defineMacro("__ATOMIC_CONSUME", "1"); 643 Builder.defineMacro("__ATOMIC_ACQUIRE", "2"); 644 Builder.defineMacro("__ATOMIC_RELEASE", "3"); 645 Builder.defineMacro("__ATOMIC_ACQ_REL", "4"); 646 Builder.defineMacro("__ATOMIC_SEQ_CST", "5"); 647 648 // Define macros for the OpenCL memory scope. 649 // The values should match AtomicScopeOpenCLModel::ID enum. 650 static_assert( 651 static_cast<unsigned>(AtomicScopeOpenCLModel::WorkGroup) == 1 && 652 static_cast<unsigned>(AtomicScopeOpenCLModel::Device) == 2 && 653 static_cast<unsigned>(AtomicScopeOpenCLModel::AllSVMDevices) == 3 && 654 static_cast<unsigned>(AtomicScopeOpenCLModel::SubGroup) == 4, 655 "Invalid OpenCL memory scope enum definition"); 656 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_WORK_ITEM", "0"); 657 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_WORK_GROUP", "1"); 658 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_DEVICE", "2"); 659 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_ALL_SVM_DEVICES", "3"); 660 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_SUB_GROUP", "4"); 661 662 // Support for #pragma redefine_extname (Sun compatibility) 663 Builder.defineMacro("__PRAGMA_REDEFINE_EXTNAME", "1"); 664 665 // Previously this macro was set to a string aiming to achieve compatibility 666 // with GCC 4.2.1. Now, just return the full Clang version 667 Builder.defineMacro("__VERSION__", "\"" + 668 Twine(getClangFullCPPVersion()) + "\""); 669 670 // Initialize language-specific preprocessor defines. 671 672 // Standard conforming mode? 673 if (!LangOpts.GNUMode && !LangOpts.MSVCCompat) 674 Builder.defineMacro("__STRICT_ANSI__"); 675 676 if (LangOpts.GNUCVersion && LangOpts.CPlusPlus11) 677 Builder.defineMacro("__GXX_EXPERIMENTAL_CXX0X__"); 678 679 if (LangOpts.ObjC) { 680 if (LangOpts.ObjCRuntime.isNonFragile()) { 681 Builder.defineMacro("__OBJC2__"); 682 683 if (LangOpts.ObjCExceptions) 684 Builder.defineMacro("OBJC_ZEROCOST_EXCEPTIONS"); 685 } 686 687 if (LangOpts.getGC() != LangOptions::NonGC) 688 Builder.defineMacro("__OBJC_GC__"); 689 690 if (LangOpts.ObjCRuntime.isNeXTFamily()) 691 Builder.defineMacro("__NEXT_RUNTIME__"); 692 693 if (LangOpts.ObjCRuntime.getKind() == ObjCRuntime::GNUstep) { 694 auto version = LangOpts.ObjCRuntime.getVersion(); 695 std::string versionString = "1"; 696 // Don't rely on the tuple argument, because we can be asked to target 697 // later ABIs than we actually support, so clamp these values to those 698 // currently supported 699 if (version >= VersionTuple(2, 0)) 700 Builder.defineMacro("__OBJC_GNUSTEP_RUNTIME_ABI__", "20"); 701 else 702 Builder.defineMacro("__OBJC_GNUSTEP_RUNTIME_ABI__", 703 "1" + Twine(std::min(8U, version.getMinor().getValueOr(0)))); 704 } 705 706 if (LangOpts.ObjCRuntime.getKind() == ObjCRuntime::ObjFW) { 707 VersionTuple tuple = LangOpts.ObjCRuntime.getVersion(); 708 709 unsigned minor = 0; 710 if (tuple.getMinor().hasValue()) 711 minor = tuple.getMinor().getValue(); 712 713 unsigned subminor = 0; 714 if (tuple.getSubminor().hasValue()) 715 subminor = tuple.getSubminor().getValue(); 716 717 Builder.defineMacro("__OBJFW_RUNTIME_ABI__", 718 Twine(tuple.getMajor() * 10000 + minor * 100 + 719 subminor)); 720 } 721 722 Builder.defineMacro("IBOutlet", "__attribute__((iboutlet))"); 723 Builder.defineMacro("IBOutletCollection(ClassName)", 724 "__attribute__((iboutletcollection(ClassName)))"); 725 Builder.defineMacro("IBAction", "void)__attribute__((ibaction)"); 726 Builder.defineMacro("IBInspectable", ""); 727 Builder.defineMacro("IB_DESIGNABLE", ""); 728 } 729 730 // Define a macro that describes the Objective-C boolean type even for C 731 // and C++ since BOOL can be used from non Objective-C code. 732 Builder.defineMacro("__OBJC_BOOL_IS_BOOL", 733 Twine(TI.useSignedCharForObjCBool() ? "0" : "1")); 734 735 if (LangOpts.CPlusPlus) 736 InitializeCPlusPlusFeatureTestMacros(LangOpts, Builder); 737 738 // darwin_constant_cfstrings controls this. This is also dependent 739 // on other things like the runtime I believe. This is set even for C code. 740 if (!LangOpts.NoConstantCFStrings) 741 Builder.defineMacro("__CONSTANT_CFSTRINGS__"); 742 743 if (LangOpts.ObjC) 744 Builder.defineMacro("OBJC_NEW_PROPERTIES"); 745 746 if (LangOpts.PascalStrings) 747 Builder.defineMacro("__PASCAL_STRINGS__"); 748 749 if (LangOpts.Blocks) { 750 Builder.defineMacro("__block", "__attribute__((__blocks__(byref)))"); 751 Builder.defineMacro("__BLOCKS__"); 752 } 753 754 if (!LangOpts.MSVCCompat && LangOpts.Exceptions) 755 Builder.defineMacro("__EXCEPTIONS"); 756 if (LangOpts.GNUCVersion && LangOpts.RTTI) 757 Builder.defineMacro("__GXX_RTTI"); 758 759 if (LangOpts.hasSjLjExceptions()) 760 Builder.defineMacro("__USING_SJLJ_EXCEPTIONS__"); 761 else if (LangOpts.hasSEHExceptions()) 762 Builder.defineMacro("__SEH__"); 763 else if (LangOpts.hasDWARFExceptions() && 764 (TI.getTriple().isThumb() || TI.getTriple().isARM())) 765 Builder.defineMacro("__ARM_DWARF_EH__"); 766 767 if (LangOpts.Deprecated) 768 Builder.defineMacro("__DEPRECATED"); 769 770 if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus) 771 Builder.defineMacro("__private_extern__", "extern"); 772 773 if (LangOpts.MicrosoftExt) { 774 if (LangOpts.WChar) { 775 // wchar_t supported as a keyword. 776 Builder.defineMacro("_WCHAR_T_DEFINED"); 777 Builder.defineMacro("_NATIVE_WCHAR_T_DEFINED"); 778 } 779 } 780 781 // Macros to help identify the narrow and wide character sets 782 // FIXME: clang currently ignores -fexec-charset=. If this changes, 783 // then this may need to be updated. 784 Builder.defineMacro("__clang_literal_encoding__", "\"UTF-8\""); 785 if (TI.getTypeWidth(TI.getWCharType()) >= 32) { 786 // FIXME: 32-bit wchar_t signals UTF-32. This may change 787 // if -fwide-exec-charset= is ever supported. 788 Builder.defineMacro("__clang_wide_literal_encoding__", "\"UTF-32\""); 789 } else { 790 // FIXME: Less-than 32-bit wchar_t generally means UTF-16 791 // (e.g., Windows, 32-bit IBM). This may need to be 792 // updated if -fwide-exec-charset= is ever supported. 793 Builder.defineMacro("__clang_wide_literal_encoding__", "\"UTF-16\""); 794 } 795 796 if (LangOpts.Optimize) 797 Builder.defineMacro("__OPTIMIZE__"); 798 if (LangOpts.OptimizeSize) 799 Builder.defineMacro("__OPTIMIZE_SIZE__"); 800 801 if (LangOpts.FastMath) 802 Builder.defineMacro("__FAST_MATH__"); 803 804 // Initialize target-specific preprocessor defines. 805 806 // __BYTE_ORDER__ was added in GCC 4.6. It's analogous 807 // to the macro __BYTE_ORDER (no trailing underscores) 808 // from glibc's <endian.h> header. 809 // We don't support the PDP-11 as a target, but include 810 // the define so it can still be compared against. 811 Builder.defineMacro("__ORDER_LITTLE_ENDIAN__", "1234"); 812 Builder.defineMacro("__ORDER_BIG_ENDIAN__", "4321"); 813 Builder.defineMacro("__ORDER_PDP_ENDIAN__", "3412"); 814 if (TI.isBigEndian()) { 815 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_BIG_ENDIAN__"); 816 Builder.defineMacro("__BIG_ENDIAN__"); 817 } else { 818 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_LITTLE_ENDIAN__"); 819 Builder.defineMacro("__LITTLE_ENDIAN__"); 820 } 821 822 if (TI.getPointerWidth(0) == 64 && TI.getLongWidth() == 64 823 && TI.getIntWidth() == 32) { 824 Builder.defineMacro("_LP64"); 825 Builder.defineMacro("__LP64__"); 826 } 827 828 if (TI.getPointerWidth(0) == 32 && TI.getLongWidth() == 32 829 && TI.getIntWidth() == 32) { 830 Builder.defineMacro("_ILP32"); 831 Builder.defineMacro("__ILP32__"); 832 } 833 834 // Define type sizing macros based on the target properties. 835 assert(TI.getCharWidth() == 8 && "Only support 8-bit char so far"); 836 Builder.defineMacro("__CHAR_BIT__", Twine(TI.getCharWidth())); 837 838 DefineTypeSize("__SCHAR_MAX__", TargetInfo::SignedChar, TI, Builder); 839 DefineTypeSize("__SHRT_MAX__", TargetInfo::SignedShort, TI, Builder); 840 DefineTypeSize("__INT_MAX__", TargetInfo::SignedInt, TI, Builder); 841 DefineTypeSize("__LONG_MAX__", TargetInfo::SignedLong, TI, Builder); 842 DefineTypeSize("__LONG_LONG_MAX__", TargetInfo::SignedLongLong, TI, Builder); 843 DefineTypeSize("__WCHAR_MAX__", TI.getWCharType(), TI, Builder); 844 DefineTypeSize("__WINT_MAX__", TI.getWIntType(), TI, Builder); 845 DefineTypeSize("__INTMAX_MAX__", TI.getIntMaxType(), TI, Builder); 846 DefineTypeSize("__SIZE_MAX__", TI.getSizeType(), TI, Builder); 847 848 DefineTypeSize("__UINTMAX_MAX__", TI.getUIntMaxType(), TI, Builder); 849 DefineTypeSize("__PTRDIFF_MAX__", TI.getPtrDiffType(0), TI, Builder); 850 DefineTypeSize("__INTPTR_MAX__", TI.getIntPtrType(), TI, Builder); 851 DefineTypeSize("__UINTPTR_MAX__", TI.getUIntPtrType(), TI, Builder); 852 853 DefineTypeSizeof("__SIZEOF_DOUBLE__", TI.getDoubleWidth(), TI, Builder); 854 DefineTypeSizeof("__SIZEOF_FLOAT__", TI.getFloatWidth(), TI, Builder); 855 DefineTypeSizeof("__SIZEOF_INT__", TI.getIntWidth(), TI, Builder); 856 DefineTypeSizeof("__SIZEOF_LONG__", TI.getLongWidth(), TI, Builder); 857 DefineTypeSizeof("__SIZEOF_LONG_DOUBLE__",TI.getLongDoubleWidth(),TI,Builder); 858 DefineTypeSizeof("__SIZEOF_LONG_LONG__", TI.getLongLongWidth(), TI, Builder); 859 DefineTypeSizeof("__SIZEOF_POINTER__", TI.getPointerWidth(0), TI, Builder); 860 DefineTypeSizeof("__SIZEOF_SHORT__", TI.getShortWidth(), TI, Builder); 861 DefineTypeSizeof("__SIZEOF_PTRDIFF_T__", 862 TI.getTypeWidth(TI.getPtrDiffType(0)), TI, Builder); 863 DefineTypeSizeof("__SIZEOF_SIZE_T__", 864 TI.getTypeWidth(TI.getSizeType()), TI, Builder); 865 DefineTypeSizeof("__SIZEOF_WCHAR_T__", 866 TI.getTypeWidth(TI.getWCharType()), TI, Builder); 867 DefineTypeSizeof("__SIZEOF_WINT_T__", 868 TI.getTypeWidth(TI.getWIntType()), TI, Builder); 869 if (TI.hasInt128Type()) 870 DefineTypeSizeof("__SIZEOF_INT128__", 128, TI, Builder); 871 872 DefineType("__INTMAX_TYPE__", TI.getIntMaxType(), Builder); 873 DefineFmt("__INTMAX", TI.getIntMaxType(), TI, Builder); 874 Builder.defineMacro("__INTMAX_C_SUFFIX__", 875 TI.getTypeConstantSuffix(TI.getIntMaxType())); 876 DefineType("__UINTMAX_TYPE__", TI.getUIntMaxType(), Builder); 877 DefineFmt("__UINTMAX", TI.getUIntMaxType(), TI, Builder); 878 Builder.defineMacro("__UINTMAX_C_SUFFIX__", 879 TI.getTypeConstantSuffix(TI.getUIntMaxType())); 880 DefineTypeWidth("__INTMAX_WIDTH__", TI.getIntMaxType(), TI, Builder); 881 DefineType("__PTRDIFF_TYPE__", TI.getPtrDiffType(0), Builder); 882 DefineFmt("__PTRDIFF", TI.getPtrDiffType(0), TI, Builder); 883 DefineTypeWidth("__PTRDIFF_WIDTH__", TI.getPtrDiffType(0), TI, Builder); 884 DefineType("__INTPTR_TYPE__", TI.getIntPtrType(), Builder); 885 DefineFmt("__INTPTR", TI.getIntPtrType(), TI, Builder); 886 DefineTypeWidth("__INTPTR_WIDTH__", TI.getIntPtrType(), TI, Builder); 887 DefineType("__SIZE_TYPE__", TI.getSizeType(), Builder); 888 DefineFmt("__SIZE", TI.getSizeType(), TI, Builder); 889 DefineTypeWidth("__SIZE_WIDTH__", TI.getSizeType(), TI, Builder); 890 DefineType("__WCHAR_TYPE__", TI.getWCharType(), Builder); 891 DefineTypeWidth("__WCHAR_WIDTH__", TI.getWCharType(), TI, Builder); 892 DefineType("__WINT_TYPE__", TI.getWIntType(), Builder); 893 DefineTypeWidth("__WINT_WIDTH__", TI.getWIntType(), TI, Builder); 894 DefineTypeWidth("__SIG_ATOMIC_WIDTH__", TI.getSigAtomicType(), TI, Builder); 895 DefineTypeSize("__SIG_ATOMIC_MAX__", TI.getSigAtomicType(), TI, Builder); 896 DefineType("__CHAR16_TYPE__", TI.getChar16Type(), Builder); 897 DefineType("__CHAR32_TYPE__", TI.getChar32Type(), Builder); 898 899 DefineTypeWidth("__UINTMAX_WIDTH__", TI.getUIntMaxType(), TI, Builder); 900 DefineType("__UINTPTR_TYPE__", TI.getUIntPtrType(), Builder); 901 DefineFmt("__UINTPTR", TI.getUIntPtrType(), TI, Builder); 902 DefineTypeWidth("__UINTPTR_WIDTH__", TI.getUIntPtrType(), TI, Builder); 903 904 if (TI.hasFloat16Type()) 905 DefineFloatMacros(Builder, "FLT16", &TI.getHalfFormat(), "F16"); 906 DefineFloatMacros(Builder, "FLT", &TI.getFloatFormat(), "F"); 907 DefineFloatMacros(Builder, "DBL", &TI.getDoubleFormat(), ""); 908 DefineFloatMacros(Builder, "LDBL", &TI.getLongDoubleFormat(), "L"); 909 910 // Define a __POINTER_WIDTH__ macro for stdint.h. 911 Builder.defineMacro("__POINTER_WIDTH__", 912 Twine((int)TI.getPointerWidth(0))); 913 914 // Define __BIGGEST_ALIGNMENT__ to be compatible with gcc. 915 Builder.defineMacro("__BIGGEST_ALIGNMENT__", 916 Twine(TI.getSuitableAlign() / TI.getCharWidth()) ); 917 918 if (!LangOpts.CharIsSigned) 919 Builder.defineMacro("__CHAR_UNSIGNED__"); 920 921 if (!TargetInfo::isTypeSigned(TI.getWCharType())) 922 Builder.defineMacro("__WCHAR_UNSIGNED__"); 923 924 if (!TargetInfo::isTypeSigned(TI.getWIntType())) 925 Builder.defineMacro("__WINT_UNSIGNED__"); 926 927 // Define exact-width integer types for stdint.h 928 DefineExactWidthIntType(TargetInfo::SignedChar, TI, Builder); 929 930 if (TI.getShortWidth() > TI.getCharWidth()) 931 DefineExactWidthIntType(TargetInfo::SignedShort, TI, Builder); 932 933 if (TI.getIntWidth() > TI.getShortWidth()) 934 DefineExactWidthIntType(TargetInfo::SignedInt, TI, Builder); 935 936 if (TI.getLongWidth() > TI.getIntWidth()) 937 DefineExactWidthIntType(TargetInfo::SignedLong, TI, Builder); 938 939 if (TI.getLongLongWidth() > TI.getLongWidth()) 940 DefineExactWidthIntType(TargetInfo::SignedLongLong, TI, Builder); 941 942 DefineExactWidthIntType(TargetInfo::UnsignedChar, TI, Builder); 943 DefineExactWidthIntTypeSize(TargetInfo::UnsignedChar, TI, Builder); 944 DefineExactWidthIntTypeSize(TargetInfo::SignedChar, TI, Builder); 945 946 if (TI.getShortWidth() > TI.getCharWidth()) { 947 DefineExactWidthIntType(TargetInfo::UnsignedShort, TI, Builder); 948 DefineExactWidthIntTypeSize(TargetInfo::UnsignedShort, TI, Builder); 949 DefineExactWidthIntTypeSize(TargetInfo::SignedShort, TI, Builder); 950 } 951 952 if (TI.getIntWidth() > TI.getShortWidth()) { 953 DefineExactWidthIntType(TargetInfo::UnsignedInt, TI, Builder); 954 DefineExactWidthIntTypeSize(TargetInfo::UnsignedInt, TI, Builder); 955 DefineExactWidthIntTypeSize(TargetInfo::SignedInt, TI, Builder); 956 } 957 958 if (TI.getLongWidth() > TI.getIntWidth()) { 959 DefineExactWidthIntType(TargetInfo::UnsignedLong, TI, Builder); 960 DefineExactWidthIntTypeSize(TargetInfo::UnsignedLong, TI, Builder); 961 DefineExactWidthIntTypeSize(TargetInfo::SignedLong, TI, Builder); 962 } 963 964 if (TI.getLongLongWidth() > TI.getLongWidth()) { 965 DefineExactWidthIntType(TargetInfo::UnsignedLongLong, TI, Builder); 966 DefineExactWidthIntTypeSize(TargetInfo::UnsignedLongLong, TI, Builder); 967 DefineExactWidthIntTypeSize(TargetInfo::SignedLongLong, TI, Builder); 968 } 969 970 DefineLeastWidthIntType(8, true, TI, Builder); 971 DefineLeastWidthIntType(8, false, TI, Builder); 972 DefineLeastWidthIntType(16, true, TI, Builder); 973 DefineLeastWidthIntType(16, false, TI, Builder); 974 DefineLeastWidthIntType(32, true, TI, Builder); 975 DefineLeastWidthIntType(32, false, TI, Builder); 976 DefineLeastWidthIntType(64, true, TI, Builder); 977 DefineLeastWidthIntType(64, false, TI, Builder); 978 979 DefineFastIntType(8, true, TI, Builder); 980 DefineFastIntType(8, false, TI, Builder); 981 DefineFastIntType(16, true, TI, Builder); 982 DefineFastIntType(16, false, TI, Builder); 983 DefineFastIntType(32, true, TI, Builder); 984 DefineFastIntType(32, false, TI, Builder); 985 DefineFastIntType(64, true, TI, Builder); 986 DefineFastIntType(64, false, TI, Builder); 987 988 Builder.defineMacro("__USER_LABEL_PREFIX__", TI.getUserLabelPrefix()); 989 990 if (LangOpts.FastMath || LangOpts.FiniteMathOnly) 991 Builder.defineMacro("__FINITE_MATH_ONLY__", "1"); 992 else 993 Builder.defineMacro("__FINITE_MATH_ONLY__", "0"); 994 995 if (LangOpts.GNUCVersion) { 996 if (LangOpts.GNUInline || LangOpts.CPlusPlus) 997 Builder.defineMacro("__GNUC_GNU_INLINE__"); 998 else 999 Builder.defineMacro("__GNUC_STDC_INLINE__"); 1000 1001 // The value written by __atomic_test_and_set. 1002 // FIXME: This is target-dependent. 1003 Builder.defineMacro("__GCC_ATOMIC_TEST_AND_SET_TRUEVAL", "1"); 1004 } 1005 1006 auto addLockFreeMacros = [&](const llvm::Twine &Prefix) { 1007 // Used by libc++ and libstdc++ to implement ATOMIC_<foo>_LOCK_FREE. 1008 unsigned InlineWidthBits = TI.getMaxAtomicInlineWidth(); 1009 #define DEFINE_LOCK_FREE_MACRO(TYPE, Type) \ 1010 Builder.defineMacro(Prefix + #TYPE "_LOCK_FREE", \ 1011 getLockFreeValue(TI.get##Type##Width(), \ 1012 TI.get##Type##Align(), \ 1013 InlineWidthBits)); 1014 DEFINE_LOCK_FREE_MACRO(BOOL, Bool); 1015 DEFINE_LOCK_FREE_MACRO(CHAR, Char); 1016 if (LangOpts.Char8) 1017 DEFINE_LOCK_FREE_MACRO(CHAR8_T, Char); // Treat char8_t like char. 1018 DEFINE_LOCK_FREE_MACRO(CHAR16_T, Char16); 1019 DEFINE_LOCK_FREE_MACRO(CHAR32_T, Char32); 1020 DEFINE_LOCK_FREE_MACRO(WCHAR_T, WChar); 1021 DEFINE_LOCK_FREE_MACRO(SHORT, Short); 1022 DEFINE_LOCK_FREE_MACRO(INT, Int); 1023 DEFINE_LOCK_FREE_MACRO(LONG, Long); 1024 DEFINE_LOCK_FREE_MACRO(LLONG, LongLong); 1025 Builder.defineMacro(Prefix + "POINTER_LOCK_FREE", 1026 getLockFreeValue(TI.getPointerWidth(0), 1027 TI.getPointerAlign(0), 1028 InlineWidthBits)); 1029 #undef DEFINE_LOCK_FREE_MACRO 1030 }; 1031 addLockFreeMacros("__CLANG_ATOMIC_"); 1032 if (LangOpts.GNUCVersion) 1033 addLockFreeMacros("__GCC_ATOMIC_"); 1034 1035 if (LangOpts.NoInlineDefine) 1036 Builder.defineMacro("__NO_INLINE__"); 1037 1038 if (unsigned PICLevel = LangOpts.PICLevel) { 1039 Builder.defineMacro("__PIC__", Twine(PICLevel)); 1040 Builder.defineMacro("__pic__", Twine(PICLevel)); 1041 if (LangOpts.PIE) { 1042 Builder.defineMacro("__PIE__", Twine(PICLevel)); 1043 Builder.defineMacro("__pie__", Twine(PICLevel)); 1044 } 1045 } 1046 1047 // Macros to control C99 numerics and <float.h> 1048 Builder.defineMacro("__FLT_EVAL_METHOD__", Twine(TI.getFloatEvalMethod())); 1049 Builder.defineMacro("__FLT_RADIX__", "2"); 1050 Builder.defineMacro("__DECIMAL_DIG__", "__LDBL_DECIMAL_DIG__"); 1051 1052 if (LangOpts.getStackProtector() == LangOptions::SSPOn) 1053 Builder.defineMacro("__SSP__"); 1054 else if (LangOpts.getStackProtector() == LangOptions::SSPStrong) 1055 Builder.defineMacro("__SSP_STRONG__", "2"); 1056 else if (LangOpts.getStackProtector() == LangOptions::SSPReq) 1057 Builder.defineMacro("__SSP_ALL__", "3"); 1058 1059 if (PPOpts.SetUpStaticAnalyzer) 1060 Builder.defineMacro("__clang_analyzer__"); 1061 1062 if (LangOpts.FastRelaxedMath) 1063 Builder.defineMacro("__FAST_RELAXED_MATH__"); 1064 1065 if (FEOpts.ProgramAction == frontend::RewriteObjC || 1066 LangOpts.getGC() != LangOptions::NonGC) { 1067 Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))"); 1068 Builder.defineMacro("__strong", "__attribute__((objc_gc(strong)))"); 1069 Builder.defineMacro("__autoreleasing", ""); 1070 Builder.defineMacro("__unsafe_unretained", ""); 1071 } else if (LangOpts.ObjC) { 1072 Builder.defineMacro("__weak", "__attribute__((objc_ownership(weak)))"); 1073 Builder.defineMacro("__strong", "__attribute__((objc_ownership(strong)))"); 1074 Builder.defineMacro("__autoreleasing", 1075 "__attribute__((objc_ownership(autoreleasing)))"); 1076 Builder.defineMacro("__unsafe_unretained", 1077 "__attribute__((objc_ownership(none)))"); 1078 } 1079 1080 // On Darwin, there are __double_underscored variants of the type 1081 // nullability qualifiers. 1082 if (TI.getTriple().isOSDarwin()) { 1083 Builder.defineMacro("__nonnull", "_Nonnull"); 1084 Builder.defineMacro("__null_unspecified", "_Null_unspecified"); 1085 Builder.defineMacro("__nullable", "_Nullable"); 1086 } 1087 1088 // Add a macro to differentiate between regular iOS/tvOS/watchOS targets and 1089 // the corresponding simulator targets. 1090 if (TI.getTriple().isOSDarwin() && TI.getTriple().isSimulatorEnvironment()) 1091 Builder.defineMacro("__APPLE_EMBEDDED_SIMULATOR__", "1"); 1092 1093 // OpenMP definition 1094 // OpenMP 2.2: 1095 // In implementations that support a preprocessor, the _OPENMP 1096 // macro name is defined to have the decimal value yyyymm where 1097 // yyyy and mm are the year and the month designations of the 1098 // version of the OpenMP API that the implementation support. 1099 if (!LangOpts.OpenMPSimd) { 1100 switch (LangOpts.OpenMP) { 1101 case 0: 1102 break; 1103 case 31: 1104 Builder.defineMacro("_OPENMP", "201107"); 1105 break; 1106 case 40: 1107 Builder.defineMacro("_OPENMP", "201307"); 1108 break; 1109 case 45: 1110 Builder.defineMacro("_OPENMP", "201511"); 1111 break; 1112 default: 1113 // Default version is OpenMP 5.0 1114 Builder.defineMacro("_OPENMP", "201811"); 1115 break; 1116 } 1117 } 1118 1119 // CUDA device path compilaton 1120 if (LangOpts.CUDAIsDevice && !LangOpts.HIP) { 1121 // The CUDA_ARCH value is set for the GPU target specified in the NVPTX 1122 // backend's target defines. 1123 Builder.defineMacro("__CUDA_ARCH__"); 1124 } 1125 1126 // We need to communicate this to our CUDA header wrapper, which in turn 1127 // informs the proper CUDA headers of this choice. 1128 if (LangOpts.CUDADeviceApproxTranscendentals || LangOpts.FastMath) { 1129 Builder.defineMacro("__CLANG_CUDA_APPROX_TRANSCENDENTALS__"); 1130 } 1131 1132 // Define a macro indicating that the source file is being compiled with a 1133 // SYCL device compiler which doesn't produce host binary. 1134 if (LangOpts.SYCLIsDevice) { 1135 Builder.defineMacro("__SYCL_DEVICE_ONLY__", "1"); 1136 } 1137 1138 // OpenCL definitions. 1139 if (LangOpts.OpenCL) { 1140 TI.getOpenCLFeatureDefines(LangOpts, Builder); 1141 1142 if (TI.getTriple().isSPIR()) 1143 Builder.defineMacro("__IMAGE_SUPPORT__"); 1144 } 1145 1146 if (TI.hasInt128Type() && LangOpts.CPlusPlus && LangOpts.GNUMode) { 1147 // For each extended integer type, g++ defines a macro mapping the 1148 // index of the type (0 in this case) in some list of extended types 1149 // to the type. 1150 Builder.defineMacro("__GLIBCXX_TYPE_INT_N_0", "__int128"); 1151 Builder.defineMacro("__GLIBCXX_BITSIZE_INT_N_0", "128"); 1152 } 1153 1154 // Get other target #defines. 1155 TI.getTargetDefines(LangOpts, Builder); 1156 } 1157 1158 /// InitializePreprocessor - Initialize the preprocessor getting it and the 1159 /// environment ready to process a single file. This returns true on error. 1160 /// 1161 void clang::InitializePreprocessor( 1162 Preprocessor &PP, const PreprocessorOptions &InitOpts, 1163 const PCHContainerReader &PCHContainerRdr, 1164 const FrontendOptions &FEOpts) { 1165 const LangOptions &LangOpts = PP.getLangOpts(); 1166 std::string PredefineBuffer; 1167 PredefineBuffer.reserve(4080); 1168 llvm::raw_string_ostream Predefines(PredefineBuffer); 1169 MacroBuilder Builder(Predefines); 1170 1171 // Emit line markers for various builtin sections of the file. We don't do 1172 // this in asm preprocessor mode, because "# 4" is not a line marker directive 1173 // in this mode. 1174 if (!PP.getLangOpts().AsmPreprocessor) 1175 Builder.append("# 1 \"<built-in>\" 3"); 1176 1177 // Install things like __POWERPC__, __GNUC__, etc into the macro table. 1178 if (InitOpts.UsePredefines) { 1179 // FIXME: This will create multiple definitions for most of the predefined 1180 // macros. This is not the right way to handle this. 1181 if ((LangOpts.CUDA || LangOpts.OpenMPIsDevice || LangOpts.SYCLIsDevice) && 1182 PP.getAuxTargetInfo()) 1183 InitializePredefinedMacros(*PP.getAuxTargetInfo(), LangOpts, FEOpts, 1184 PP.getPreprocessorOpts(), Builder); 1185 1186 InitializePredefinedMacros(PP.getTargetInfo(), LangOpts, FEOpts, 1187 PP.getPreprocessorOpts(), Builder); 1188 1189 // Install definitions to make Objective-C++ ARC work well with various 1190 // C++ Standard Library implementations. 1191 if (LangOpts.ObjC && LangOpts.CPlusPlus && 1192 (LangOpts.ObjCAutoRefCount || LangOpts.ObjCWeak)) { 1193 switch (InitOpts.ObjCXXARCStandardLibrary) { 1194 case ARCXX_nolib: 1195 case ARCXX_libcxx: 1196 break; 1197 1198 case ARCXX_libstdcxx: 1199 AddObjCXXARCLibstdcxxDefines(LangOpts, Builder); 1200 break; 1201 } 1202 } 1203 } 1204 1205 // Even with predefines off, some macros are still predefined. 1206 // These should all be defined in the preprocessor according to the 1207 // current language configuration. 1208 InitializeStandardPredefinedMacros(PP.getTargetInfo(), PP.getLangOpts(), 1209 FEOpts, Builder); 1210 1211 // Add on the predefines from the driver. Wrap in a #line directive to report 1212 // that they come from the command line. 1213 if (!PP.getLangOpts().AsmPreprocessor) 1214 Builder.append("# 1 \"<command line>\" 1"); 1215 1216 // Process #define's and #undef's in the order they are given. 1217 for (unsigned i = 0, e = InitOpts.Macros.size(); i != e; ++i) { 1218 if (InitOpts.Macros[i].second) // isUndef 1219 Builder.undefineMacro(InitOpts.Macros[i].first); 1220 else 1221 DefineBuiltinMacro(Builder, InitOpts.Macros[i].first, 1222 PP.getDiagnostics()); 1223 } 1224 1225 // Exit the command line and go back to <built-in> (2 is LC_LEAVE). 1226 if (!PP.getLangOpts().AsmPreprocessor) 1227 Builder.append("# 1 \"<built-in>\" 2"); 1228 1229 // If -imacros are specified, include them now. These are processed before 1230 // any -include directives. 1231 for (unsigned i = 0, e = InitOpts.MacroIncludes.size(); i != e; ++i) 1232 AddImplicitIncludeMacros(Builder, InitOpts.MacroIncludes[i]); 1233 1234 // Process -include-pch/-include-pth directives. 1235 if (!InitOpts.ImplicitPCHInclude.empty()) 1236 AddImplicitIncludePCH(Builder, PP, PCHContainerRdr, 1237 InitOpts.ImplicitPCHInclude); 1238 1239 // Process -include directives. 1240 for (unsigned i = 0, e = InitOpts.Includes.size(); i != e; ++i) { 1241 const std::string &Path = InitOpts.Includes[i]; 1242 AddImplicitInclude(Builder, Path); 1243 } 1244 1245 // Instruct the preprocessor to skip the preamble. 1246 PP.setSkipMainFilePreamble(InitOpts.PrecompiledPreambleBytes.first, 1247 InitOpts.PrecompiledPreambleBytes.second); 1248 1249 // Copy PredefinedBuffer into the Preprocessor. 1250 PP.setPredefines(Predefines.str()); 1251 } 1252