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/HLSLRuntime.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/Preprocessor.h" 25 #include "clang/Lex/PreprocessorOptions.h" 26 #include "clang/Serialization/ASTReader.h" 27 #include "llvm/ADT/APFloat.h" 28 #include "llvm/IR/DataLayout.h" 29 #include "llvm/IR/DerivedTypes.h" 30 using namespace clang; 31 32 static bool MacroBodyEndsInBackslash(StringRef MacroBody) { 33 while (!MacroBody.empty() && isWhitespace(MacroBody.back())) 34 MacroBody = MacroBody.drop_back(); 35 return !MacroBody.empty() && MacroBody.back() == '\\'; 36 } 37 38 // Append a #define line to Buf for Macro. Macro should be of the form XXX, 39 // in which case we emit "#define XXX 1" or "XXX=Y z W" in which case we emit 40 // "#define XXX Y z W". To get a #define with no value, use "XXX=". 41 static void DefineBuiltinMacro(MacroBuilder &Builder, StringRef Macro, 42 DiagnosticsEngine &Diags) { 43 std::pair<StringRef, StringRef> MacroPair = Macro.split('='); 44 StringRef MacroName = MacroPair.first; 45 StringRef MacroBody = MacroPair.second; 46 if (MacroName.size() != Macro.size()) { 47 // Per GCC -D semantics, the macro ends at \n if it exists. 48 StringRef::size_type End = MacroBody.find_first_of("\n\r"); 49 if (End != StringRef::npos) 50 Diags.Report(diag::warn_fe_macro_contains_embedded_newline) 51 << MacroName; 52 MacroBody = MacroBody.substr(0, End); 53 // We handle macro bodies which end in a backslash by appending an extra 54 // backslash+newline. This makes sure we don't accidentally treat the 55 // backslash as a line continuation marker. 56 if (MacroBodyEndsInBackslash(MacroBody)) 57 Builder.defineMacro(MacroName, Twine(MacroBody) + "\\\n"); 58 else 59 Builder.defineMacro(MacroName, MacroBody); 60 } else { 61 // Push "macroname 1". 62 Builder.defineMacro(Macro); 63 } 64 } 65 66 /// AddImplicitInclude - Add an implicit \#include of the specified file to the 67 /// predefines buffer. 68 /// As these includes are generated by -include arguments the header search 69 /// logic is going to search relatively to the current working directory. 70 static void AddImplicitInclude(MacroBuilder &Builder, StringRef File) { 71 Builder.append(Twine("#include \"") + File + "\""); 72 } 73 74 static void AddImplicitIncludeMacros(MacroBuilder &Builder, StringRef File) { 75 Builder.append(Twine("#__include_macros \"") + File + "\""); 76 // Marker token to stop the __include_macros fetch loop. 77 Builder.append("##"); // ##? 78 } 79 80 /// Add an implicit \#include using the original file used to generate 81 /// a PCH file. 82 static void AddImplicitIncludePCH(MacroBuilder &Builder, Preprocessor &PP, 83 const PCHContainerReader &PCHContainerRdr, 84 StringRef ImplicitIncludePCH) { 85 std::string OriginalFile = ASTReader::getOriginalSourceFile( 86 std::string(ImplicitIncludePCH), PP.getFileManager(), PCHContainerRdr, 87 PP.getDiagnostics()); 88 if (OriginalFile.empty()) 89 return; 90 91 AddImplicitInclude(Builder, OriginalFile); 92 } 93 94 /// PickFP - This is used to pick a value based on the FP semantics of the 95 /// specified FP model. 96 template <typename T> 97 static T PickFP(const llvm::fltSemantics *Sem, T IEEEHalfVal, T IEEESingleVal, 98 T IEEEDoubleVal, T X87DoubleExtendedVal, T PPCDoubleDoubleVal, 99 T IEEEQuadVal) { 100 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEhalf()) 101 return IEEEHalfVal; 102 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEsingle()) 103 return IEEESingleVal; 104 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEdouble()) 105 return IEEEDoubleVal; 106 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::x87DoubleExtended()) 107 return X87DoubleExtendedVal; 108 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::PPCDoubleDouble()) 109 return PPCDoubleDoubleVal; 110 assert(Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEquad()); 111 return IEEEQuadVal; 112 } 113 114 static void DefineFloatMacros(MacroBuilder &Builder, StringRef Prefix, 115 const llvm::fltSemantics *Sem, StringRef Ext) { 116 const char *DenormMin, *Epsilon, *Max, *Min; 117 DenormMin = PickFP(Sem, "5.9604644775390625e-8", "1.40129846e-45", 118 "4.9406564584124654e-324", "3.64519953188247460253e-4951", 119 "4.94065645841246544176568792868221e-324", 120 "6.47517511943802511092443895822764655e-4966"); 121 int Digits = PickFP(Sem, 3, 6, 15, 18, 31, 33); 122 int DecimalDigits = PickFP(Sem, 5, 9, 17, 21, 33, 36); 123 Epsilon = PickFP(Sem, "9.765625e-4", "1.19209290e-7", 124 "2.2204460492503131e-16", "1.08420217248550443401e-19", 125 "4.94065645841246544176568792868221e-324", 126 "1.92592994438723585305597794258492732e-34"); 127 int MantissaDigits = PickFP(Sem, 11, 24, 53, 64, 106, 113); 128 int Min10Exp = PickFP(Sem, -4, -37, -307, -4931, -291, -4931); 129 int Max10Exp = PickFP(Sem, 4, 38, 308, 4932, 308, 4932); 130 int MinExp = PickFP(Sem, -13, -125, -1021, -16381, -968, -16381); 131 int MaxExp = PickFP(Sem, 16, 128, 1024, 16384, 1024, 16384); 132 Min = PickFP(Sem, "6.103515625e-5", "1.17549435e-38", "2.2250738585072014e-308", 133 "3.36210314311209350626e-4932", 134 "2.00416836000897277799610805135016e-292", 135 "3.36210314311209350626267781732175260e-4932"); 136 Max = PickFP(Sem, "6.5504e+4", "3.40282347e+38", "1.7976931348623157e+308", 137 "1.18973149535723176502e+4932", 138 "1.79769313486231580793728971405301e+308", 139 "1.18973149535723176508575932662800702e+4932"); 140 141 SmallString<32> DefPrefix; 142 DefPrefix = "__"; 143 DefPrefix += Prefix; 144 DefPrefix += "_"; 145 146 Builder.defineMacro(DefPrefix + "DENORM_MIN__", Twine(DenormMin)+Ext); 147 Builder.defineMacro(DefPrefix + "HAS_DENORM__"); 148 Builder.defineMacro(DefPrefix + "DIG__", Twine(Digits)); 149 Builder.defineMacro(DefPrefix + "DECIMAL_DIG__", Twine(DecimalDigits)); 150 Builder.defineMacro(DefPrefix + "EPSILON__", Twine(Epsilon)+Ext); 151 Builder.defineMacro(DefPrefix + "HAS_INFINITY__"); 152 Builder.defineMacro(DefPrefix + "HAS_QUIET_NAN__"); 153 Builder.defineMacro(DefPrefix + "MANT_DIG__", Twine(MantissaDigits)); 154 155 Builder.defineMacro(DefPrefix + "MAX_10_EXP__", Twine(Max10Exp)); 156 Builder.defineMacro(DefPrefix + "MAX_EXP__", Twine(MaxExp)); 157 Builder.defineMacro(DefPrefix + "MAX__", Twine(Max)+Ext); 158 159 Builder.defineMacro(DefPrefix + "MIN_10_EXP__","("+Twine(Min10Exp)+")"); 160 Builder.defineMacro(DefPrefix + "MIN_EXP__", "("+Twine(MinExp)+")"); 161 Builder.defineMacro(DefPrefix + "MIN__", Twine(Min)+Ext); 162 } 163 164 165 /// DefineTypeSize - Emit a macro to the predefines buffer that declares a macro 166 /// named MacroName with the max value for a type with width 'TypeWidth' a 167 /// signedness of 'isSigned' and with a value suffix of 'ValSuffix' (e.g. LL). 168 static void DefineTypeSize(const Twine &MacroName, unsigned TypeWidth, 169 StringRef ValSuffix, bool isSigned, 170 MacroBuilder &Builder) { 171 llvm::APInt MaxVal = isSigned ? llvm::APInt::getSignedMaxValue(TypeWidth) 172 : llvm::APInt::getMaxValue(TypeWidth); 173 Builder.defineMacro(MacroName, toString(MaxVal, 10, isSigned) + ValSuffix); 174 } 175 176 /// DefineTypeSize - An overloaded helper that uses TargetInfo to determine 177 /// the width, suffix, and signedness of the given type 178 static void DefineTypeSize(const Twine &MacroName, TargetInfo::IntType Ty, 179 const TargetInfo &TI, MacroBuilder &Builder) { 180 DefineTypeSize(MacroName, TI.getTypeWidth(Ty), TI.getTypeConstantSuffix(Ty), 181 TI.isTypeSigned(Ty), Builder); 182 } 183 184 static void DefineFmt(const Twine &Prefix, TargetInfo::IntType Ty, 185 const TargetInfo &TI, MacroBuilder &Builder) { 186 bool IsSigned = TI.isTypeSigned(Ty); 187 StringRef FmtModifier = TI.getTypeFormatModifier(Ty); 188 for (const char *Fmt = IsSigned ? "di" : "ouxX"; *Fmt; ++Fmt) { 189 Builder.defineMacro(Prefix + "_FMT" + Twine(*Fmt) + "__", 190 Twine("\"") + FmtModifier + Twine(*Fmt) + "\""); 191 } 192 } 193 194 static void DefineType(const Twine &MacroName, TargetInfo::IntType Ty, 195 MacroBuilder &Builder) { 196 Builder.defineMacro(MacroName, TargetInfo::getTypeName(Ty)); 197 } 198 199 static void DefineTypeWidth(const Twine &MacroName, TargetInfo::IntType Ty, 200 const TargetInfo &TI, MacroBuilder &Builder) { 201 Builder.defineMacro(MacroName, Twine(TI.getTypeWidth(Ty))); 202 } 203 204 static void DefineTypeSizeof(StringRef MacroName, unsigned BitWidth, 205 const TargetInfo &TI, MacroBuilder &Builder) { 206 Builder.defineMacro(MacroName, 207 Twine(BitWidth / TI.getCharWidth())); 208 } 209 210 // This will generate a macro based on the prefix with `_MAX__` as the suffix 211 // for the max value representable for the type, and a macro with a `_WIDTH__` 212 // suffix for the width of the type. 213 static void DefineTypeSizeAndWidth(const Twine &Prefix, TargetInfo::IntType Ty, 214 const TargetInfo &TI, 215 MacroBuilder &Builder) { 216 DefineTypeSize(Prefix + "_MAX__", Ty, TI, Builder); 217 DefineTypeWidth(Prefix + "_WIDTH__", Ty, TI, Builder); 218 } 219 220 static void DefineExactWidthIntType(TargetInfo::IntType Ty, 221 const TargetInfo &TI, 222 MacroBuilder &Builder) { 223 int TypeWidth = TI.getTypeWidth(Ty); 224 bool IsSigned = TI.isTypeSigned(Ty); 225 226 // Use the target specified int64 type, when appropriate, so that [u]int64_t 227 // ends up being defined in terms of the correct type. 228 if (TypeWidth == 64) 229 Ty = IsSigned ? TI.getInt64Type() : TI.getUInt64Type(); 230 231 // Use the target specified int16 type when appropriate. Some MCU targets 232 // (such as AVR) have definition of [u]int16_t to [un]signed int. 233 if (TypeWidth == 16) 234 Ty = IsSigned ? TI.getInt16Type() : TI.getUInt16Type(); 235 236 const char *Prefix = IsSigned ? "__INT" : "__UINT"; 237 238 DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder); 239 DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder); 240 241 StringRef ConstSuffix(TI.getTypeConstantSuffix(Ty)); 242 Builder.defineMacro(Prefix + Twine(TypeWidth) + "_C_SUFFIX__", ConstSuffix); 243 } 244 245 static void DefineExactWidthIntTypeSize(TargetInfo::IntType Ty, 246 const TargetInfo &TI, 247 MacroBuilder &Builder) { 248 int TypeWidth = TI.getTypeWidth(Ty); 249 bool IsSigned = TI.isTypeSigned(Ty); 250 251 // Use the target specified int64 type, when appropriate, so that [u]int64_t 252 // ends up being defined in terms of the correct type. 253 if (TypeWidth == 64) 254 Ty = IsSigned ? TI.getInt64Type() : TI.getUInt64Type(); 255 256 // We don't need to define a _WIDTH macro for the exact-width types because 257 // we already know the width. 258 const char *Prefix = IsSigned ? "__INT" : "__UINT"; 259 DefineTypeSize(Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder); 260 } 261 262 static void DefineLeastWidthIntType(unsigned TypeWidth, bool IsSigned, 263 const TargetInfo &TI, 264 MacroBuilder &Builder) { 265 TargetInfo::IntType Ty = TI.getLeastIntTypeByWidth(TypeWidth, IsSigned); 266 if (Ty == TargetInfo::NoInt) 267 return; 268 269 const char *Prefix = IsSigned ? "__INT_LEAST" : "__UINT_LEAST"; 270 DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder); 271 // We only want the *_WIDTH macro for the signed types to avoid too many 272 // predefined macros (the unsigned width and the signed width are identical.) 273 if (IsSigned) 274 DefineTypeSizeAndWidth(Prefix + Twine(TypeWidth), Ty, TI, Builder); 275 else 276 DefineTypeSize(Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder); 277 DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder); 278 } 279 280 static void DefineFastIntType(unsigned TypeWidth, bool IsSigned, 281 const TargetInfo &TI, MacroBuilder &Builder) { 282 // stdint.h currently defines the fast int types as equivalent to the least 283 // types. 284 TargetInfo::IntType Ty = TI.getLeastIntTypeByWidth(TypeWidth, IsSigned); 285 if (Ty == TargetInfo::NoInt) 286 return; 287 288 const char *Prefix = IsSigned ? "__INT_FAST" : "__UINT_FAST"; 289 DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder); 290 // We only want the *_WIDTH macro for the signed types to avoid too many 291 // predefined macros (the unsigned width and the signed width are identical.) 292 if (IsSigned) 293 DefineTypeSizeAndWidth(Prefix + Twine(TypeWidth), Ty, TI, Builder); 294 else 295 DefineTypeSize(Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder); 296 DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder); 297 } 298 299 300 /// Get the value the ATOMIC_*_LOCK_FREE macro should have for a type with 301 /// the specified properties. 302 static const char *getLockFreeValue(unsigned TypeWidth, const TargetInfo &TI) { 303 // Fully-aligned, power-of-2 sizes no larger than the inline 304 // width will be inlined as lock-free operations. 305 // Note: we do not need to check alignment since _Atomic(T) is always 306 // appropriately-aligned in clang. 307 if (TI.hasBuiltinAtomic(TypeWidth, TypeWidth)) 308 return "2"; // "always lock free" 309 // We cannot be certain what operations the lib calls might be 310 // able to implement as lock-free on future processors. 311 return "1"; // "sometimes lock free" 312 } 313 314 /// Add definitions required for a smooth interaction between 315 /// Objective-C++ automated reference counting and libstdc++ (4.2). 316 static void AddObjCXXARCLibstdcxxDefines(const LangOptions &LangOpts, 317 MacroBuilder &Builder) { 318 Builder.defineMacro("_GLIBCXX_PREDEFINED_OBJC_ARC_IS_SCALAR"); 319 320 std::string Result; 321 { 322 // Provide specializations for the __is_scalar type trait so that 323 // lifetime-qualified objects are not considered "scalar" types, which 324 // libstdc++ uses as an indicator of the presence of trivial copy, assign, 325 // default-construct, and destruct semantics (none of which hold for 326 // lifetime-qualified objects in ARC). 327 llvm::raw_string_ostream Out(Result); 328 329 Out << "namespace std {\n" 330 << "\n" 331 << "struct __true_type;\n" 332 << "struct __false_type;\n" 333 << "\n"; 334 335 Out << "template<typename _Tp> struct __is_scalar;\n" 336 << "\n"; 337 338 if (LangOpts.ObjCAutoRefCount) { 339 Out << "template<typename _Tp>\n" 340 << "struct __is_scalar<__attribute__((objc_ownership(strong))) _Tp> {\n" 341 << " enum { __value = 0 };\n" 342 << " typedef __false_type __type;\n" 343 << "};\n" 344 << "\n"; 345 } 346 347 if (LangOpts.ObjCWeak) { 348 Out << "template<typename _Tp>\n" 349 << "struct __is_scalar<__attribute__((objc_ownership(weak))) _Tp> {\n" 350 << " enum { __value = 0 };\n" 351 << " typedef __false_type __type;\n" 352 << "};\n" 353 << "\n"; 354 } 355 356 if (LangOpts.ObjCAutoRefCount) { 357 Out << "template<typename _Tp>\n" 358 << "struct __is_scalar<__attribute__((objc_ownership(autoreleasing)))" 359 << " _Tp> {\n" 360 << " enum { __value = 0 };\n" 361 << " typedef __false_type __type;\n" 362 << "};\n" 363 << "\n"; 364 } 365 366 Out << "}\n"; 367 } 368 Builder.append(Result); 369 } 370 371 static void InitializeStandardPredefinedMacros(const TargetInfo &TI, 372 const LangOptions &LangOpts, 373 const FrontendOptions &FEOpts, 374 MacroBuilder &Builder) { 375 if (LangOpts.HLSL) { 376 Builder.defineMacro("__hlsl_clang"); 377 // HLSL Version 378 Builder.defineMacro("__HLSL_VERSION", 379 Twine((unsigned)LangOpts.getHLSLVersion())); 380 381 if (LangOpts.NativeHalfType) 382 Builder.defineMacro("__HLSL_ENABLE_16_BIT", 383 Twine((unsigned)LangOpts.getHLSLVersion())); 384 385 // Shader target information 386 // "enums" for shader stages 387 Builder.defineMacro("__SHADER_STAGE_VERTEX", 388 Twine((uint32_t)ShaderStage::Vertex)); 389 Builder.defineMacro("__SHADER_STAGE_PIXEL", 390 Twine((uint32_t)ShaderStage::Pixel)); 391 Builder.defineMacro("__SHADER_STAGE_GEOMETRY", 392 Twine((uint32_t)ShaderStage::Geometry)); 393 Builder.defineMacro("__SHADER_STAGE_HULL", 394 Twine((uint32_t)ShaderStage::Hull)); 395 Builder.defineMacro("__SHADER_STAGE_DOMAIN", 396 Twine((uint32_t)ShaderStage::Domain)); 397 Builder.defineMacro("__SHADER_STAGE_COMPUTE", 398 Twine((uint32_t)ShaderStage::Compute)); 399 Builder.defineMacro("__SHADER_STAGE_AMPLIFICATION", 400 Twine((uint32_t)ShaderStage::Amplification)); 401 Builder.defineMacro("__SHADER_STAGE_MESH", 402 Twine((uint32_t)ShaderStage::Mesh)); 403 Builder.defineMacro("__SHADER_STAGE_LIBRARY", 404 Twine((uint32_t)ShaderStage::Library)); 405 // The current shader stage itself 406 uint32_t StageInteger = static_cast<uint32_t>( 407 hlsl::getStageFromEnvironment(TI.getTriple().getEnvironment())); 408 409 Builder.defineMacro("__SHADER_TARGET_STAGE", Twine(StageInteger)); 410 // Add target versions 411 if (TI.getTriple().getOS() == llvm::Triple::ShaderModel) { 412 VersionTuple Version = TI.getTriple().getOSVersion(); 413 Builder.defineMacro("__SHADER_TARGET_MAJOR", Twine(Version.getMajor())); 414 unsigned Minor = Version.getMinor().value_or(0); 415 Builder.defineMacro("__SHADER_TARGET_MINOR", Twine(Minor)); 416 } 417 return; 418 } 419 // C++ [cpp.predefined]p1: 420 // The following macro names shall be defined by the implementation: 421 422 // -- __STDC__ 423 // [C++] Whether __STDC__ is predefined and if so, what its value is, 424 // are implementation-defined. 425 // (Removed in C++20.) 426 if (!LangOpts.MSVCCompat && !LangOpts.TraditionalCPP) 427 Builder.defineMacro("__STDC__"); 428 // -- __STDC_HOSTED__ 429 // The integer literal 1 if the implementation is a hosted 430 // implementation or the integer literal 0 if it is not. 431 if (LangOpts.Freestanding) 432 Builder.defineMacro("__STDC_HOSTED__", "0"); 433 else 434 Builder.defineMacro("__STDC_HOSTED__"); 435 436 // -- __STDC_VERSION__ 437 // [C++] Whether __STDC_VERSION__ is predefined and if so, what its 438 // value is, are implementation-defined. 439 // (Removed in C++20.) 440 if (!LangOpts.CPlusPlus) { 441 // FIXME: Use correct value for C23. 442 if (LangOpts.C2x) 443 Builder.defineMacro("__STDC_VERSION__", "202000L"); 444 else if (LangOpts.C17) 445 Builder.defineMacro("__STDC_VERSION__", "201710L"); 446 else if (LangOpts.C11) 447 Builder.defineMacro("__STDC_VERSION__", "201112L"); 448 else if (LangOpts.C99) 449 Builder.defineMacro("__STDC_VERSION__", "199901L"); 450 else if (!LangOpts.GNUMode && LangOpts.Digraphs) 451 Builder.defineMacro("__STDC_VERSION__", "199409L"); 452 } else { 453 // -- __cplusplus 454 if (LangOpts.CPlusPlus26) 455 // FIXME: Use correct value for C++26. 456 Builder.defineMacro("__cplusplus", "202400L"); 457 else if (LangOpts.CPlusPlus23) 458 Builder.defineMacro("__cplusplus", "202302L"); 459 // [C++20] The integer literal 202002L. 460 else if (LangOpts.CPlusPlus20) 461 Builder.defineMacro("__cplusplus", "202002L"); 462 // [C++17] The integer literal 201703L. 463 else if (LangOpts.CPlusPlus17) 464 Builder.defineMacro("__cplusplus", "201703L"); 465 // [C++14] The name __cplusplus is defined to the value 201402L when 466 // compiling a C++ translation unit. 467 else if (LangOpts.CPlusPlus14) 468 Builder.defineMacro("__cplusplus", "201402L"); 469 // [C++11] The name __cplusplus is defined to the value 201103L when 470 // compiling a C++ translation unit. 471 else if (LangOpts.CPlusPlus11) 472 Builder.defineMacro("__cplusplus", "201103L"); 473 // [C++03] The name __cplusplus is defined to the value 199711L when 474 // compiling a C++ translation unit. 475 else 476 Builder.defineMacro("__cplusplus", "199711L"); 477 478 // -- __STDCPP_DEFAULT_NEW_ALIGNMENT__ 479 // [C++17] An integer literal of type std::size_t whose value is the 480 // alignment guaranteed by a call to operator new(std::size_t) 481 // 482 // We provide this in all language modes, since it seems generally useful. 483 Builder.defineMacro("__STDCPP_DEFAULT_NEW_ALIGNMENT__", 484 Twine(TI.getNewAlign() / TI.getCharWidth()) + 485 TI.getTypeConstantSuffix(TI.getSizeType())); 486 487 // -- __STDCPP_THREADS__ 488 // Defined, and has the value integer literal 1, if and only if a 489 // program can have more than one thread of execution. 490 if (LangOpts.getThreadModel() == LangOptions::ThreadModelKind::POSIX) 491 Builder.defineMacro("__STDCPP_THREADS__", "1"); 492 } 493 494 // In C11 these are environment macros. In C++11 they are only defined 495 // as part of <cuchar>. To prevent breakage when mixing C and C++ 496 // code, define these macros unconditionally. We can define them 497 // unconditionally, as Clang always uses UTF-16 and UTF-32 for 16-bit 498 // and 32-bit character literals. 499 Builder.defineMacro("__STDC_UTF_16__", "1"); 500 Builder.defineMacro("__STDC_UTF_32__", "1"); 501 502 if (LangOpts.ObjC) 503 Builder.defineMacro("__OBJC__"); 504 505 // OpenCL v1.0/1.1 s6.9, v1.2/2.0 s6.10: Preprocessor Directives and Macros. 506 if (LangOpts.OpenCL) { 507 if (LangOpts.CPlusPlus) { 508 switch (LangOpts.OpenCLCPlusPlusVersion) { 509 case 100: 510 Builder.defineMacro("__OPENCL_CPP_VERSION__", "100"); 511 break; 512 case 202100: 513 Builder.defineMacro("__OPENCL_CPP_VERSION__", "202100"); 514 break; 515 default: 516 llvm_unreachable("Unsupported C++ version for OpenCL"); 517 } 518 Builder.defineMacro("__CL_CPP_VERSION_1_0__", "100"); 519 Builder.defineMacro("__CL_CPP_VERSION_2021__", "202100"); 520 } else { 521 // OpenCL v1.0 and v1.1 do not have a predefined macro to indicate the 522 // language standard with which the program is compiled. __OPENCL_VERSION__ 523 // is for the OpenCL version supported by the OpenCL device, which is not 524 // necessarily the language standard with which the program is compiled. 525 // A shared OpenCL header file requires a macro to indicate the language 526 // standard. As a workaround, __OPENCL_C_VERSION__ is defined for 527 // OpenCL v1.0 and v1.1. 528 switch (LangOpts.OpenCLVersion) { 529 case 100: 530 Builder.defineMacro("__OPENCL_C_VERSION__", "100"); 531 break; 532 case 110: 533 Builder.defineMacro("__OPENCL_C_VERSION__", "110"); 534 break; 535 case 120: 536 Builder.defineMacro("__OPENCL_C_VERSION__", "120"); 537 break; 538 case 200: 539 Builder.defineMacro("__OPENCL_C_VERSION__", "200"); 540 break; 541 case 300: 542 Builder.defineMacro("__OPENCL_C_VERSION__", "300"); 543 break; 544 default: 545 llvm_unreachable("Unsupported OpenCL version"); 546 } 547 } 548 Builder.defineMacro("CL_VERSION_1_0", "100"); 549 Builder.defineMacro("CL_VERSION_1_1", "110"); 550 Builder.defineMacro("CL_VERSION_1_2", "120"); 551 Builder.defineMacro("CL_VERSION_2_0", "200"); 552 Builder.defineMacro("CL_VERSION_3_0", "300"); 553 554 if (TI.isLittleEndian()) 555 Builder.defineMacro("__ENDIAN_LITTLE__"); 556 557 if (LangOpts.FastRelaxedMath) 558 Builder.defineMacro("__FAST_RELAXED_MATH__"); 559 } 560 561 if (LangOpts.SYCLIsDevice || LangOpts.SYCLIsHost) { 562 // SYCL Version is set to a value when building SYCL applications 563 if (LangOpts.getSYCLVersion() == LangOptions::SYCL_2017) 564 Builder.defineMacro("CL_SYCL_LANGUAGE_VERSION", "121"); 565 else if (LangOpts.getSYCLVersion() == LangOptions::SYCL_2020) 566 Builder.defineMacro("SYCL_LANGUAGE_VERSION", "202001"); 567 } 568 569 // Not "standard" per se, but available even with the -undef flag. 570 if (LangOpts.AsmPreprocessor) 571 Builder.defineMacro("__ASSEMBLER__"); 572 if (LangOpts.CUDA) { 573 if (LangOpts.GPURelocatableDeviceCode) 574 Builder.defineMacro("__CLANG_RDC__"); 575 if (!LangOpts.HIP) 576 Builder.defineMacro("__CUDA__"); 577 if (LangOpts.GPUDefaultStream == 578 LangOptions::GPUDefaultStreamKind::PerThread) 579 Builder.defineMacro("CUDA_API_PER_THREAD_DEFAULT_STREAM"); 580 } 581 if (LangOpts.HIP) { 582 Builder.defineMacro("__HIP__"); 583 Builder.defineMacro("__HIPCC__"); 584 Builder.defineMacro("__HIP_MEMORY_SCOPE_SINGLETHREAD", "1"); 585 Builder.defineMacro("__HIP_MEMORY_SCOPE_WAVEFRONT", "2"); 586 Builder.defineMacro("__HIP_MEMORY_SCOPE_WORKGROUP", "3"); 587 Builder.defineMacro("__HIP_MEMORY_SCOPE_AGENT", "4"); 588 Builder.defineMacro("__HIP_MEMORY_SCOPE_SYSTEM", "5"); 589 if (LangOpts.CUDAIsDevice) { 590 Builder.defineMacro("__HIP_DEVICE_COMPILE__"); 591 if (!TI.hasHIPImageSupport()) { 592 Builder.defineMacro("__HIP_NO_IMAGE_SUPPORT__", "1"); 593 // Deprecated. 594 Builder.defineMacro("__HIP_NO_IMAGE_SUPPORT", "1"); 595 } 596 } 597 if (LangOpts.GPUDefaultStream == 598 LangOptions::GPUDefaultStreamKind::PerThread) { 599 Builder.defineMacro("__HIP_API_PER_THREAD_DEFAULT_STREAM__"); 600 // Deprecated. 601 Builder.defineMacro("HIP_API_PER_THREAD_DEFAULT_STREAM"); 602 } 603 } 604 } 605 606 /// Initialize the predefined C++ language feature test macros defined in 607 /// ISO/IEC JTC1/SC22/WG21 (C++) SD-6: "SG10 Feature Test Recommendations". 608 static void InitializeCPlusPlusFeatureTestMacros(const LangOptions &LangOpts, 609 MacroBuilder &Builder) { 610 // C++98 features. 611 if (LangOpts.RTTI) 612 Builder.defineMacro("__cpp_rtti", "199711L"); 613 if (LangOpts.CXXExceptions) 614 Builder.defineMacro("__cpp_exceptions", "199711L"); 615 616 // C++11 features. 617 if (LangOpts.CPlusPlus11) { 618 Builder.defineMacro("__cpp_unicode_characters", "200704L"); 619 Builder.defineMacro("__cpp_raw_strings", "200710L"); 620 Builder.defineMacro("__cpp_unicode_literals", "200710L"); 621 Builder.defineMacro("__cpp_user_defined_literals", "200809L"); 622 Builder.defineMacro("__cpp_lambdas", "200907L"); 623 Builder.defineMacro("__cpp_constexpr", LangOpts.CPlusPlus26 ? "202306L" 624 : LangOpts.CPlusPlus23 ? "202211L" 625 : LangOpts.CPlusPlus20 ? "201907L" 626 : LangOpts.CPlusPlus17 ? "201603L" 627 : LangOpts.CPlusPlus14 ? "201304L" 628 : "200704"); 629 Builder.defineMacro("__cpp_constexpr_in_decltype", "201711L"); 630 Builder.defineMacro("__cpp_range_based_for", 631 LangOpts.CPlusPlus17 ? "201603L" : "200907"); 632 Builder.defineMacro("__cpp_static_assert", LangOpts.CPlusPlus26 ? "202306L" 633 : LangOpts.CPlusPlus17 634 ? "201411L" 635 : "200410"); 636 Builder.defineMacro("__cpp_decltype", "200707L"); 637 Builder.defineMacro("__cpp_attributes", "200809L"); 638 Builder.defineMacro("__cpp_rvalue_references", "200610L"); 639 Builder.defineMacro("__cpp_variadic_templates", "200704L"); 640 Builder.defineMacro("__cpp_initializer_lists", "200806L"); 641 Builder.defineMacro("__cpp_delegating_constructors", "200604L"); 642 Builder.defineMacro("__cpp_nsdmi", "200809L"); 643 Builder.defineMacro("__cpp_inheriting_constructors", "201511L"); 644 Builder.defineMacro("__cpp_ref_qualifiers", "200710L"); 645 Builder.defineMacro("__cpp_alias_templates", "200704L"); 646 } 647 if (LangOpts.ThreadsafeStatics) 648 Builder.defineMacro("__cpp_threadsafe_static_init", "200806L"); 649 650 // C++14 features. 651 if (LangOpts.CPlusPlus14) { 652 Builder.defineMacro("__cpp_binary_literals", "201304L"); 653 Builder.defineMacro("__cpp_digit_separators", "201309L"); 654 Builder.defineMacro("__cpp_init_captures", 655 LangOpts.CPlusPlus20 ? "201803L" : "201304L"); 656 Builder.defineMacro("__cpp_generic_lambdas", 657 LangOpts.CPlusPlus20 ? "201707L" : "201304L"); 658 Builder.defineMacro("__cpp_decltype_auto", "201304L"); 659 Builder.defineMacro("__cpp_return_type_deduction", "201304L"); 660 Builder.defineMacro("__cpp_aggregate_nsdmi", "201304L"); 661 Builder.defineMacro("__cpp_variable_templates", "201304L"); 662 } 663 if (LangOpts.SizedDeallocation) 664 Builder.defineMacro("__cpp_sized_deallocation", "201309L"); 665 666 // C++17 features. 667 if (LangOpts.CPlusPlus17) { 668 Builder.defineMacro("__cpp_hex_float", "201603L"); 669 Builder.defineMacro("__cpp_inline_variables", "201606L"); 670 Builder.defineMacro("__cpp_noexcept_function_type", "201510L"); 671 Builder.defineMacro("__cpp_capture_star_this", "201603L"); 672 Builder.defineMacro("__cpp_if_constexpr", "201606L"); 673 Builder.defineMacro("__cpp_deduction_guides", "201703L"); // (not latest) 674 Builder.defineMacro("__cpp_template_auto", "201606L"); // (old name) 675 Builder.defineMacro("__cpp_namespace_attributes", "201411L"); 676 Builder.defineMacro("__cpp_enumerator_attributes", "201411L"); 677 Builder.defineMacro("__cpp_nested_namespace_definitions", "201411L"); 678 Builder.defineMacro("__cpp_variadic_using", "201611L"); 679 Builder.defineMacro("__cpp_aggregate_bases", "201603L"); 680 Builder.defineMacro("__cpp_structured_bindings", "201606L"); 681 Builder.defineMacro("__cpp_nontype_template_args", 682 "201411L"); // (not latest) 683 Builder.defineMacro("__cpp_fold_expressions", "201603L"); 684 Builder.defineMacro("__cpp_guaranteed_copy_elision", "201606L"); 685 Builder.defineMacro("__cpp_nontype_template_parameter_auto", "201606L"); 686 } 687 if (LangOpts.AlignedAllocation && !LangOpts.AlignedAllocationUnavailable) 688 Builder.defineMacro("__cpp_aligned_new", "201606L"); 689 if (LangOpts.RelaxedTemplateTemplateArgs) 690 Builder.defineMacro("__cpp_template_template_args", "201611L"); 691 692 // C++20 features. 693 if (LangOpts.CPlusPlus20) { 694 Builder.defineMacro("__cpp_aggregate_paren_init", "201902L"); 695 696 // P0848 is implemented, but we're still waiting for other concepts 697 // issues to be addressed before bumping __cpp_concepts up to 202002L. 698 // Refer to the discussion of this at https://reviews.llvm.org/D128619. 699 Builder.defineMacro("__cpp_concepts", "201907L"); 700 Builder.defineMacro("__cpp_conditional_explicit", "201806L"); 701 Builder.defineMacro("__cpp_consteval", "202211L"); 702 Builder.defineMacro("__cpp_constexpr_dynamic_alloc", "201907L"); 703 Builder.defineMacro("__cpp_constinit", "201907L"); 704 Builder.defineMacro("__cpp_impl_coroutine", "201902L"); 705 Builder.defineMacro("__cpp_designated_initializers", "201707L"); 706 Builder.defineMacro("__cpp_impl_three_way_comparison", "201907L"); 707 //Builder.defineMacro("__cpp_modules", "201907L"); 708 Builder.defineMacro("__cpp_using_enum", "201907L"); 709 } 710 // C++23 features. 711 if (LangOpts.CPlusPlus23) { 712 Builder.defineMacro("__cpp_implicit_move", "202011L"); 713 Builder.defineMacro("__cpp_size_t_suffix", "202011L"); 714 Builder.defineMacro("__cpp_if_consteval", "202106L"); 715 Builder.defineMacro("__cpp_multidimensional_subscript", "202211L"); 716 } 717 718 // We provide those C++23 features as extensions in earlier language modes, so 719 // we also define their feature test macros. 720 if (LangOpts.CPlusPlus11) 721 Builder.defineMacro("__cpp_static_call_operator", "202207L"); 722 Builder.defineMacro("__cpp_named_character_escapes", "202207L"); 723 724 if (LangOpts.Char8) 725 Builder.defineMacro("__cpp_char8_t", "202207L"); 726 Builder.defineMacro("__cpp_impl_destroying_delete", "201806L"); 727 } 728 729 /// InitializeOpenCLFeatureTestMacros - Define OpenCL macros based on target 730 /// settings and language version 731 void InitializeOpenCLFeatureTestMacros(const TargetInfo &TI, 732 const LangOptions &Opts, 733 MacroBuilder &Builder) { 734 const llvm::StringMap<bool> &OpenCLFeaturesMap = TI.getSupportedOpenCLOpts(); 735 // FIXME: OpenCL options which affect language semantics/syntax 736 // should be moved into LangOptions. 737 auto defineOpenCLExtMacro = [&](llvm::StringRef Name, auto... OptArgs) { 738 // Check if extension is supported by target and is available in this 739 // OpenCL version 740 if (TI.hasFeatureEnabled(OpenCLFeaturesMap, Name) && 741 OpenCLOptions::isOpenCLOptionAvailableIn(Opts, OptArgs...)) 742 Builder.defineMacro(Name); 743 }; 744 #define OPENCL_GENERIC_EXTENSION(Ext, ...) \ 745 defineOpenCLExtMacro(#Ext, __VA_ARGS__); 746 #include "clang/Basic/OpenCLExtensions.def" 747 748 // Assume compiling for FULL profile 749 Builder.defineMacro("__opencl_c_int64"); 750 } 751 752 static void InitializePredefinedMacros(const TargetInfo &TI, 753 const LangOptions &LangOpts, 754 const FrontendOptions &FEOpts, 755 const PreprocessorOptions &PPOpts, 756 MacroBuilder &Builder) { 757 // Compiler version introspection macros. 758 Builder.defineMacro("__llvm__"); // LLVM Backend 759 Builder.defineMacro("__clang__"); // Clang Frontend 760 #define TOSTR2(X) #X 761 #define TOSTR(X) TOSTR2(X) 762 Builder.defineMacro("__clang_major__", TOSTR(CLANG_VERSION_MAJOR)); 763 Builder.defineMacro("__clang_minor__", TOSTR(CLANG_VERSION_MINOR)); 764 Builder.defineMacro("__clang_patchlevel__", TOSTR(CLANG_VERSION_PATCHLEVEL)); 765 #undef TOSTR 766 #undef TOSTR2 767 Builder.defineMacro("__clang_version__", 768 "\"" CLANG_VERSION_STRING " " 769 + getClangFullRepositoryVersion() + "\""); 770 771 if (LangOpts.GNUCVersion != 0) { 772 // Major, minor, patch, are given two decimal places each, so 4.2.1 becomes 773 // 40201. 774 unsigned GNUCMajor = LangOpts.GNUCVersion / 100 / 100; 775 unsigned GNUCMinor = LangOpts.GNUCVersion / 100 % 100; 776 unsigned GNUCPatch = LangOpts.GNUCVersion % 100; 777 Builder.defineMacro("__GNUC__", Twine(GNUCMajor)); 778 Builder.defineMacro("__GNUC_MINOR__", Twine(GNUCMinor)); 779 Builder.defineMacro("__GNUC_PATCHLEVEL__", Twine(GNUCPatch)); 780 Builder.defineMacro("__GXX_ABI_VERSION", "1002"); 781 782 if (LangOpts.CPlusPlus) { 783 Builder.defineMacro("__GNUG__", Twine(GNUCMajor)); 784 Builder.defineMacro("__GXX_WEAK__"); 785 } 786 } 787 788 // Define macros for the C11 / C++11 memory orderings 789 Builder.defineMacro("__ATOMIC_RELAXED", "0"); 790 Builder.defineMacro("__ATOMIC_CONSUME", "1"); 791 Builder.defineMacro("__ATOMIC_ACQUIRE", "2"); 792 Builder.defineMacro("__ATOMIC_RELEASE", "3"); 793 Builder.defineMacro("__ATOMIC_ACQ_REL", "4"); 794 Builder.defineMacro("__ATOMIC_SEQ_CST", "5"); 795 796 // Define macros for the OpenCL memory scope. 797 // The values should match AtomicScopeOpenCLModel::ID enum. 798 static_assert( 799 static_cast<unsigned>(AtomicScopeOpenCLModel::WorkGroup) == 1 && 800 static_cast<unsigned>(AtomicScopeOpenCLModel::Device) == 2 && 801 static_cast<unsigned>(AtomicScopeOpenCLModel::AllSVMDevices) == 3 && 802 static_cast<unsigned>(AtomicScopeOpenCLModel::SubGroup) == 4, 803 "Invalid OpenCL memory scope enum definition"); 804 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_WORK_ITEM", "0"); 805 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_WORK_GROUP", "1"); 806 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_DEVICE", "2"); 807 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_ALL_SVM_DEVICES", "3"); 808 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_SUB_GROUP", "4"); 809 810 // Define macros for floating-point data classes, used in __builtin_isfpclass. 811 Builder.defineMacro("__FPCLASS_SNAN", "0x0001"); 812 Builder.defineMacro("__FPCLASS_QNAN", "0x0002"); 813 Builder.defineMacro("__FPCLASS_NEGINF", "0x0004"); 814 Builder.defineMacro("__FPCLASS_NEGNORMAL", "0x0008"); 815 Builder.defineMacro("__FPCLASS_NEGSUBNORMAL", "0x0010"); 816 Builder.defineMacro("__FPCLASS_NEGZERO", "0x0020"); 817 Builder.defineMacro("__FPCLASS_POSZERO", "0x0040"); 818 Builder.defineMacro("__FPCLASS_POSSUBNORMAL", "0x0080"); 819 Builder.defineMacro("__FPCLASS_POSNORMAL", "0x0100"); 820 Builder.defineMacro("__FPCLASS_POSINF", "0x0200"); 821 822 // Support for #pragma redefine_extname (Sun compatibility) 823 Builder.defineMacro("__PRAGMA_REDEFINE_EXTNAME", "1"); 824 825 // Previously this macro was set to a string aiming to achieve compatibility 826 // with GCC 4.2.1. Now, just return the full Clang version 827 Builder.defineMacro("__VERSION__", "\"" + 828 Twine(getClangFullCPPVersion()) + "\""); 829 830 // Initialize language-specific preprocessor defines. 831 832 // Standard conforming mode? 833 if (!LangOpts.GNUMode && !LangOpts.MSVCCompat) 834 Builder.defineMacro("__STRICT_ANSI__"); 835 836 if (LangOpts.GNUCVersion && LangOpts.CPlusPlus11) 837 Builder.defineMacro("__GXX_EXPERIMENTAL_CXX0X__"); 838 839 if (LangOpts.ObjC) { 840 if (LangOpts.ObjCRuntime.isNonFragile()) { 841 Builder.defineMacro("__OBJC2__"); 842 843 if (LangOpts.ObjCExceptions) 844 Builder.defineMacro("OBJC_ZEROCOST_EXCEPTIONS"); 845 } 846 847 if (LangOpts.getGC() != LangOptions::NonGC) 848 Builder.defineMacro("__OBJC_GC__"); 849 850 if (LangOpts.ObjCRuntime.isNeXTFamily()) 851 Builder.defineMacro("__NEXT_RUNTIME__"); 852 853 if (LangOpts.ObjCRuntime.getKind() == ObjCRuntime::GNUstep) { 854 auto version = LangOpts.ObjCRuntime.getVersion(); 855 std::string versionString = "1"; 856 // Don't rely on the tuple argument, because we can be asked to target 857 // later ABIs than we actually support, so clamp these values to those 858 // currently supported 859 if (version >= VersionTuple(2, 0)) 860 Builder.defineMacro("__OBJC_GNUSTEP_RUNTIME_ABI__", "20"); 861 else 862 Builder.defineMacro( 863 "__OBJC_GNUSTEP_RUNTIME_ABI__", 864 "1" + Twine(std::min(8U, version.getMinor().value_or(0)))); 865 } 866 867 if (LangOpts.ObjCRuntime.getKind() == ObjCRuntime::ObjFW) { 868 VersionTuple tuple = LangOpts.ObjCRuntime.getVersion(); 869 unsigned minor = tuple.getMinor().value_or(0); 870 unsigned subminor = tuple.getSubminor().value_or(0); 871 Builder.defineMacro("__OBJFW_RUNTIME_ABI__", 872 Twine(tuple.getMajor() * 10000 + minor * 100 + 873 subminor)); 874 } 875 876 Builder.defineMacro("IBOutlet", "__attribute__((iboutlet))"); 877 Builder.defineMacro("IBOutletCollection(ClassName)", 878 "__attribute__((iboutletcollection(ClassName)))"); 879 Builder.defineMacro("IBAction", "void)__attribute__((ibaction)"); 880 Builder.defineMacro("IBInspectable", ""); 881 Builder.defineMacro("IB_DESIGNABLE", ""); 882 } 883 884 // Define a macro that describes the Objective-C boolean type even for C 885 // and C++ since BOOL can be used from non Objective-C code. 886 Builder.defineMacro("__OBJC_BOOL_IS_BOOL", 887 Twine(TI.useSignedCharForObjCBool() ? "0" : "1")); 888 889 if (LangOpts.CPlusPlus) 890 InitializeCPlusPlusFeatureTestMacros(LangOpts, Builder); 891 892 // darwin_constant_cfstrings controls this. This is also dependent 893 // on other things like the runtime I believe. This is set even for C code. 894 if (!LangOpts.NoConstantCFStrings) 895 Builder.defineMacro("__CONSTANT_CFSTRINGS__"); 896 897 if (LangOpts.ObjC) 898 Builder.defineMacro("OBJC_NEW_PROPERTIES"); 899 900 if (LangOpts.PascalStrings) 901 Builder.defineMacro("__PASCAL_STRINGS__"); 902 903 if (LangOpts.Blocks) { 904 Builder.defineMacro("__block", "__attribute__((__blocks__(byref)))"); 905 Builder.defineMacro("__BLOCKS__"); 906 } 907 908 if (!LangOpts.MSVCCompat && LangOpts.Exceptions) 909 Builder.defineMacro("__EXCEPTIONS"); 910 if (LangOpts.GNUCVersion && LangOpts.RTTI) 911 Builder.defineMacro("__GXX_RTTI"); 912 913 if (LangOpts.hasSjLjExceptions()) 914 Builder.defineMacro("__USING_SJLJ_EXCEPTIONS__"); 915 else if (LangOpts.hasSEHExceptions()) 916 Builder.defineMacro("__SEH__"); 917 else if (LangOpts.hasDWARFExceptions() && 918 (TI.getTriple().isThumb() || TI.getTriple().isARM())) 919 Builder.defineMacro("__ARM_DWARF_EH__"); 920 921 if (LangOpts.Deprecated) 922 Builder.defineMacro("__DEPRECATED"); 923 924 if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus) 925 Builder.defineMacro("__private_extern__", "extern"); 926 927 if (LangOpts.MicrosoftExt) { 928 if (LangOpts.WChar) { 929 // wchar_t supported as a keyword. 930 Builder.defineMacro("_WCHAR_T_DEFINED"); 931 Builder.defineMacro("_NATIVE_WCHAR_T_DEFINED"); 932 } 933 } 934 935 // Macros to help identify the narrow and wide character sets 936 // FIXME: clang currently ignores -fexec-charset=. If this changes, 937 // then this may need to be updated. 938 Builder.defineMacro("__clang_literal_encoding__", "\"UTF-8\""); 939 if (TI.getTypeWidth(TI.getWCharType()) >= 32) { 940 // FIXME: 32-bit wchar_t signals UTF-32. This may change 941 // if -fwide-exec-charset= is ever supported. 942 Builder.defineMacro("__clang_wide_literal_encoding__", "\"UTF-32\""); 943 } else { 944 // FIXME: Less-than 32-bit wchar_t generally means UTF-16 945 // (e.g., Windows, 32-bit IBM). This may need to be 946 // updated if -fwide-exec-charset= is ever supported. 947 Builder.defineMacro("__clang_wide_literal_encoding__", "\"UTF-16\""); 948 } 949 950 if (LangOpts.Optimize) 951 Builder.defineMacro("__OPTIMIZE__"); 952 if (LangOpts.OptimizeSize) 953 Builder.defineMacro("__OPTIMIZE_SIZE__"); 954 955 if (LangOpts.FastMath) 956 Builder.defineMacro("__FAST_MATH__"); 957 958 // Initialize target-specific preprocessor defines. 959 960 // __BYTE_ORDER__ was added in GCC 4.6. It's analogous 961 // to the macro __BYTE_ORDER (no trailing underscores) 962 // from glibc's <endian.h> header. 963 // We don't support the PDP-11 as a target, but include 964 // the define so it can still be compared against. 965 Builder.defineMacro("__ORDER_LITTLE_ENDIAN__", "1234"); 966 Builder.defineMacro("__ORDER_BIG_ENDIAN__", "4321"); 967 Builder.defineMacro("__ORDER_PDP_ENDIAN__", "3412"); 968 if (TI.isBigEndian()) { 969 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_BIG_ENDIAN__"); 970 Builder.defineMacro("__BIG_ENDIAN__"); 971 } else { 972 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_LITTLE_ENDIAN__"); 973 Builder.defineMacro("__LITTLE_ENDIAN__"); 974 } 975 976 if (TI.getPointerWidth(LangAS::Default) == 64 && TI.getLongWidth() == 64 && 977 TI.getIntWidth() == 32) { 978 Builder.defineMacro("_LP64"); 979 Builder.defineMacro("__LP64__"); 980 } 981 982 if (TI.getPointerWidth(LangAS::Default) == 32 && TI.getLongWidth() == 32 && 983 TI.getIntWidth() == 32) { 984 Builder.defineMacro("_ILP32"); 985 Builder.defineMacro("__ILP32__"); 986 } 987 988 // Define type sizing macros based on the target properties. 989 assert(TI.getCharWidth() == 8 && "Only support 8-bit char so far"); 990 Builder.defineMacro("__CHAR_BIT__", Twine(TI.getCharWidth())); 991 992 Builder.defineMacro("__BOOL_WIDTH__", Twine(TI.getBoolWidth())); 993 Builder.defineMacro("__SHRT_WIDTH__", Twine(TI.getShortWidth())); 994 Builder.defineMacro("__INT_WIDTH__", Twine(TI.getIntWidth())); 995 Builder.defineMacro("__LONG_WIDTH__", Twine(TI.getLongWidth())); 996 Builder.defineMacro("__LLONG_WIDTH__", Twine(TI.getLongLongWidth())); 997 998 size_t BitIntMaxWidth = TI.getMaxBitIntWidth(); 999 assert(BitIntMaxWidth <= llvm::IntegerType::MAX_INT_BITS && 1000 "Target defined a max bit width larger than LLVM can support!"); 1001 assert(BitIntMaxWidth >= TI.getLongLongWidth() && 1002 "Target defined a max bit width smaller than the C standard allows!"); 1003 Builder.defineMacro("__BITINT_MAXWIDTH__", Twine(BitIntMaxWidth)); 1004 1005 DefineTypeSize("__SCHAR_MAX__", TargetInfo::SignedChar, TI, Builder); 1006 DefineTypeSize("__SHRT_MAX__", TargetInfo::SignedShort, TI, Builder); 1007 DefineTypeSize("__INT_MAX__", TargetInfo::SignedInt, TI, Builder); 1008 DefineTypeSize("__LONG_MAX__", TargetInfo::SignedLong, TI, Builder); 1009 DefineTypeSize("__LONG_LONG_MAX__", TargetInfo::SignedLongLong, TI, Builder); 1010 DefineTypeSizeAndWidth("__WCHAR", TI.getWCharType(), TI, Builder); 1011 DefineTypeSizeAndWidth("__WINT", TI.getWIntType(), TI, Builder); 1012 DefineTypeSizeAndWidth("__INTMAX", TI.getIntMaxType(), TI, Builder); 1013 DefineTypeSizeAndWidth("__SIZE", TI.getSizeType(), TI, Builder); 1014 1015 DefineTypeSizeAndWidth("__UINTMAX", TI.getUIntMaxType(), TI, Builder); 1016 DefineTypeSizeAndWidth("__PTRDIFF", TI.getPtrDiffType(LangAS::Default), TI, 1017 Builder); 1018 DefineTypeSizeAndWidth("__INTPTR", TI.getIntPtrType(), TI, Builder); 1019 DefineTypeSizeAndWidth("__UINTPTR", TI.getUIntPtrType(), TI, Builder); 1020 1021 DefineTypeSizeof("__SIZEOF_DOUBLE__", TI.getDoubleWidth(), TI, Builder); 1022 DefineTypeSizeof("__SIZEOF_FLOAT__", TI.getFloatWidth(), TI, Builder); 1023 DefineTypeSizeof("__SIZEOF_INT__", TI.getIntWidth(), TI, Builder); 1024 DefineTypeSizeof("__SIZEOF_LONG__", TI.getLongWidth(), TI, Builder); 1025 DefineTypeSizeof("__SIZEOF_LONG_DOUBLE__",TI.getLongDoubleWidth(),TI,Builder); 1026 DefineTypeSizeof("__SIZEOF_LONG_LONG__", TI.getLongLongWidth(), TI, Builder); 1027 DefineTypeSizeof("__SIZEOF_POINTER__", TI.getPointerWidth(LangAS::Default), 1028 TI, Builder); 1029 DefineTypeSizeof("__SIZEOF_SHORT__", TI.getShortWidth(), TI, Builder); 1030 DefineTypeSizeof("__SIZEOF_PTRDIFF_T__", 1031 TI.getTypeWidth(TI.getPtrDiffType(LangAS::Default)), TI, 1032 Builder); 1033 DefineTypeSizeof("__SIZEOF_SIZE_T__", 1034 TI.getTypeWidth(TI.getSizeType()), TI, Builder); 1035 DefineTypeSizeof("__SIZEOF_WCHAR_T__", 1036 TI.getTypeWidth(TI.getWCharType()), TI, Builder); 1037 DefineTypeSizeof("__SIZEOF_WINT_T__", 1038 TI.getTypeWidth(TI.getWIntType()), TI, Builder); 1039 if (TI.hasInt128Type()) 1040 DefineTypeSizeof("__SIZEOF_INT128__", 128, TI, Builder); 1041 1042 DefineType("__INTMAX_TYPE__", TI.getIntMaxType(), Builder); 1043 DefineFmt("__INTMAX", TI.getIntMaxType(), TI, Builder); 1044 Builder.defineMacro("__INTMAX_C_SUFFIX__", 1045 TI.getTypeConstantSuffix(TI.getIntMaxType())); 1046 DefineType("__UINTMAX_TYPE__", TI.getUIntMaxType(), Builder); 1047 DefineFmt("__UINTMAX", TI.getUIntMaxType(), TI, Builder); 1048 Builder.defineMacro("__UINTMAX_C_SUFFIX__", 1049 TI.getTypeConstantSuffix(TI.getUIntMaxType())); 1050 DefineType("__PTRDIFF_TYPE__", TI.getPtrDiffType(LangAS::Default), Builder); 1051 DefineFmt("__PTRDIFF", TI.getPtrDiffType(LangAS::Default), TI, Builder); 1052 DefineType("__INTPTR_TYPE__", TI.getIntPtrType(), Builder); 1053 DefineFmt("__INTPTR", TI.getIntPtrType(), TI, Builder); 1054 DefineType("__SIZE_TYPE__", TI.getSizeType(), Builder); 1055 DefineFmt("__SIZE", TI.getSizeType(), TI, Builder); 1056 DefineType("__WCHAR_TYPE__", TI.getWCharType(), Builder); 1057 DefineType("__WINT_TYPE__", TI.getWIntType(), Builder); 1058 DefineTypeSizeAndWidth("__SIG_ATOMIC", TI.getSigAtomicType(), TI, Builder); 1059 DefineType("__CHAR16_TYPE__", TI.getChar16Type(), Builder); 1060 DefineType("__CHAR32_TYPE__", TI.getChar32Type(), Builder); 1061 1062 DefineType("__UINTPTR_TYPE__", TI.getUIntPtrType(), Builder); 1063 DefineFmt("__UINTPTR", TI.getUIntPtrType(), TI, Builder); 1064 1065 // The C standard requires the width of uintptr_t and intptr_t to be the same, 1066 // per 7.20.2.4p1. Same for intmax_t and uintmax_t, per 7.20.2.5p1. 1067 assert(TI.getTypeWidth(TI.getUIntPtrType()) == 1068 TI.getTypeWidth(TI.getIntPtrType()) && 1069 "uintptr_t and intptr_t have different widths?"); 1070 assert(TI.getTypeWidth(TI.getUIntMaxType()) == 1071 TI.getTypeWidth(TI.getIntMaxType()) && 1072 "uintmax_t and intmax_t have different widths?"); 1073 1074 if (TI.hasFloat16Type()) 1075 DefineFloatMacros(Builder, "FLT16", &TI.getHalfFormat(), "F16"); 1076 DefineFloatMacros(Builder, "FLT", &TI.getFloatFormat(), "F"); 1077 DefineFloatMacros(Builder, "DBL", &TI.getDoubleFormat(), ""); 1078 DefineFloatMacros(Builder, "LDBL", &TI.getLongDoubleFormat(), "L"); 1079 1080 // Define a __POINTER_WIDTH__ macro for stdint.h. 1081 Builder.defineMacro("__POINTER_WIDTH__", 1082 Twine((int)TI.getPointerWidth(LangAS::Default))); 1083 1084 // Define __BIGGEST_ALIGNMENT__ to be compatible with gcc. 1085 Builder.defineMacro("__BIGGEST_ALIGNMENT__", 1086 Twine(TI.getSuitableAlign() / TI.getCharWidth()) ); 1087 1088 if (!LangOpts.CharIsSigned) 1089 Builder.defineMacro("__CHAR_UNSIGNED__"); 1090 1091 if (!TargetInfo::isTypeSigned(TI.getWCharType())) 1092 Builder.defineMacro("__WCHAR_UNSIGNED__"); 1093 1094 if (!TargetInfo::isTypeSigned(TI.getWIntType())) 1095 Builder.defineMacro("__WINT_UNSIGNED__"); 1096 1097 // Define exact-width integer types for stdint.h 1098 DefineExactWidthIntType(TargetInfo::SignedChar, TI, Builder); 1099 1100 if (TI.getShortWidth() > TI.getCharWidth()) 1101 DefineExactWidthIntType(TargetInfo::SignedShort, TI, Builder); 1102 1103 if (TI.getIntWidth() > TI.getShortWidth()) 1104 DefineExactWidthIntType(TargetInfo::SignedInt, TI, Builder); 1105 1106 if (TI.getLongWidth() > TI.getIntWidth()) 1107 DefineExactWidthIntType(TargetInfo::SignedLong, TI, Builder); 1108 1109 if (TI.getLongLongWidth() > TI.getLongWidth()) 1110 DefineExactWidthIntType(TargetInfo::SignedLongLong, TI, Builder); 1111 1112 DefineExactWidthIntType(TargetInfo::UnsignedChar, TI, Builder); 1113 DefineExactWidthIntTypeSize(TargetInfo::UnsignedChar, TI, Builder); 1114 DefineExactWidthIntTypeSize(TargetInfo::SignedChar, TI, Builder); 1115 1116 if (TI.getShortWidth() > TI.getCharWidth()) { 1117 DefineExactWidthIntType(TargetInfo::UnsignedShort, TI, Builder); 1118 DefineExactWidthIntTypeSize(TargetInfo::UnsignedShort, TI, Builder); 1119 DefineExactWidthIntTypeSize(TargetInfo::SignedShort, TI, Builder); 1120 } 1121 1122 if (TI.getIntWidth() > TI.getShortWidth()) { 1123 DefineExactWidthIntType(TargetInfo::UnsignedInt, TI, Builder); 1124 DefineExactWidthIntTypeSize(TargetInfo::UnsignedInt, TI, Builder); 1125 DefineExactWidthIntTypeSize(TargetInfo::SignedInt, TI, Builder); 1126 } 1127 1128 if (TI.getLongWidth() > TI.getIntWidth()) { 1129 DefineExactWidthIntType(TargetInfo::UnsignedLong, TI, Builder); 1130 DefineExactWidthIntTypeSize(TargetInfo::UnsignedLong, TI, Builder); 1131 DefineExactWidthIntTypeSize(TargetInfo::SignedLong, TI, Builder); 1132 } 1133 1134 if (TI.getLongLongWidth() > TI.getLongWidth()) { 1135 DefineExactWidthIntType(TargetInfo::UnsignedLongLong, TI, Builder); 1136 DefineExactWidthIntTypeSize(TargetInfo::UnsignedLongLong, TI, Builder); 1137 DefineExactWidthIntTypeSize(TargetInfo::SignedLongLong, TI, Builder); 1138 } 1139 1140 DefineLeastWidthIntType(8, true, TI, Builder); 1141 DefineLeastWidthIntType(8, false, TI, Builder); 1142 DefineLeastWidthIntType(16, true, TI, Builder); 1143 DefineLeastWidthIntType(16, false, TI, Builder); 1144 DefineLeastWidthIntType(32, true, TI, Builder); 1145 DefineLeastWidthIntType(32, false, TI, Builder); 1146 DefineLeastWidthIntType(64, true, TI, Builder); 1147 DefineLeastWidthIntType(64, false, TI, Builder); 1148 1149 DefineFastIntType(8, true, TI, Builder); 1150 DefineFastIntType(8, false, TI, Builder); 1151 DefineFastIntType(16, true, TI, Builder); 1152 DefineFastIntType(16, false, TI, Builder); 1153 DefineFastIntType(32, true, TI, Builder); 1154 DefineFastIntType(32, false, TI, Builder); 1155 DefineFastIntType(64, true, TI, Builder); 1156 DefineFastIntType(64, false, TI, Builder); 1157 1158 Builder.defineMacro("__USER_LABEL_PREFIX__", TI.getUserLabelPrefix()); 1159 1160 if (!LangOpts.MathErrno) 1161 Builder.defineMacro("__NO_MATH_ERRNO__"); 1162 1163 if (LangOpts.FastMath || LangOpts.FiniteMathOnly) 1164 Builder.defineMacro("__FINITE_MATH_ONLY__", "1"); 1165 else 1166 Builder.defineMacro("__FINITE_MATH_ONLY__", "0"); 1167 1168 if (LangOpts.GNUCVersion) { 1169 if (LangOpts.GNUInline || LangOpts.CPlusPlus) 1170 Builder.defineMacro("__GNUC_GNU_INLINE__"); 1171 else 1172 Builder.defineMacro("__GNUC_STDC_INLINE__"); 1173 1174 // The value written by __atomic_test_and_set. 1175 // FIXME: This is target-dependent. 1176 Builder.defineMacro("__GCC_ATOMIC_TEST_AND_SET_TRUEVAL", "1"); 1177 } 1178 1179 auto addLockFreeMacros = [&](const llvm::Twine &Prefix) { 1180 // Used by libc++ and libstdc++ to implement ATOMIC_<foo>_LOCK_FREE. 1181 #define DEFINE_LOCK_FREE_MACRO(TYPE, Type) \ 1182 Builder.defineMacro(Prefix + #TYPE "_LOCK_FREE", \ 1183 getLockFreeValue(TI.get##Type##Width(), TI)); 1184 DEFINE_LOCK_FREE_MACRO(BOOL, Bool); 1185 DEFINE_LOCK_FREE_MACRO(CHAR, Char); 1186 if (LangOpts.Char8) 1187 DEFINE_LOCK_FREE_MACRO(CHAR8_T, Char); // Treat char8_t like char. 1188 DEFINE_LOCK_FREE_MACRO(CHAR16_T, Char16); 1189 DEFINE_LOCK_FREE_MACRO(CHAR32_T, Char32); 1190 DEFINE_LOCK_FREE_MACRO(WCHAR_T, WChar); 1191 DEFINE_LOCK_FREE_MACRO(SHORT, Short); 1192 DEFINE_LOCK_FREE_MACRO(INT, Int); 1193 DEFINE_LOCK_FREE_MACRO(LONG, Long); 1194 DEFINE_LOCK_FREE_MACRO(LLONG, LongLong); 1195 Builder.defineMacro( 1196 Prefix + "POINTER_LOCK_FREE", 1197 getLockFreeValue(TI.getPointerWidth(LangAS::Default), TI)); 1198 #undef DEFINE_LOCK_FREE_MACRO 1199 }; 1200 addLockFreeMacros("__CLANG_ATOMIC_"); 1201 if (LangOpts.GNUCVersion) 1202 addLockFreeMacros("__GCC_ATOMIC_"); 1203 1204 if (LangOpts.NoInlineDefine) 1205 Builder.defineMacro("__NO_INLINE__"); 1206 1207 if (unsigned PICLevel = LangOpts.PICLevel) { 1208 Builder.defineMacro("__PIC__", Twine(PICLevel)); 1209 Builder.defineMacro("__pic__", Twine(PICLevel)); 1210 if (LangOpts.PIE) { 1211 Builder.defineMacro("__PIE__", Twine(PICLevel)); 1212 Builder.defineMacro("__pie__", Twine(PICLevel)); 1213 } 1214 } 1215 1216 // Macros to control C99 numerics and <float.h> 1217 Builder.defineMacro("__FLT_RADIX__", "2"); 1218 Builder.defineMacro("__DECIMAL_DIG__", "__LDBL_DECIMAL_DIG__"); 1219 1220 if (LangOpts.getStackProtector() == LangOptions::SSPOn) 1221 Builder.defineMacro("__SSP__"); 1222 else if (LangOpts.getStackProtector() == LangOptions::SSPStrong) 1223 Builder.defineMacro("__SSP_STRONG__", "2"); 1224 else if (LangOpts.getStackProtector() == LangOptions::SSPReq) 1225 Builder.defineMacro("__SSP_ALL__", "3"); 1226 1227 if (PPOpts.SetUpStaticAnalyzer) 1228 Builder.defineMacro("__clang_analyzer__"); 1229 1230 if (LangOpts.FastRelaxedMath) 1231 Builder.defineMacro("__FAST_RELAXED_MATH__"); 1232 1233 if (FEOpts.ProgramAction == frontend::RewriteObjC || 1234 LangOpts.getGC() != LangOptions::NonGC) { 1235 Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))"); 1236 Builder.defineMacro("__strong", "__attribute__((objc_gc(strong)))"); 1237 Builder.defineMacro("__autoreleasing", ""); 1238 Builder.defineMacro("__unsafe_unretained", ""); 1239 } else if (LangOpts.ObjC) { 1240 Builder.defineMacro("__weak", "__attribute__((objc_ownership(weak)))"); 1241 Builder.defineMacro("__strong", "__attribute__((objc_ownership(strong)))"); 1242 Builder.defineMacro("__autoreleasing", 1243 "__attribute__((objc_ownership(autoreleasing)))"); 1244 Builder.defineMacro("__unsafe_unretained", 1245 "__attribute__((objc_ownership(none)))"); 1246 } 1247 1248 // On Darwin, there are __double_underscored variants of the type 1249 // nullability qualifiers. 1250 if (TI.getTriple().isOSDarwin()) { 1251 Builder.defineMacro("__nonnull", "_Nonnull"); 1252 Builder.defineMacro("__null_unspecified", "_Null_unspecified"); 1253 Builder.defineMacro("__nullable", "_Nullable"); 1254 } 1255 1256 // Add a macro to differentiate between regular iOS/tvOS/watchOS targets and 1257 // the corresponding simulator targets. 1258 if (TI.getTriple().isOSDarwin() && TI.getTriple().isSimulatorEnvironment()) 1259 Builder.defineMacro("__APPLE_EMBEDDED_SIMULATOR__", "1"); 1260 1261 // OpenMP definition 1262 // OpenMP 2.2: 1263 // In implementations that support a preprocessor, the _OPENMP 1264 // macro name is defined to have the decimal value yyyymm where 1265 // yyyy and mm are the year and the month designations of the 1266 // version of the OpenMP API that the implementation support. 1267 if (!LangOpts.OpenMPSimd) { 1268 switch (LangOpts.OpenMP) { 1269 case 0: 1270 break; 1271 case 31: 1272 Builder.defineMacro("_OPENMP", "201107"); 1273 break; 1274 case 40: 1275 Builder.defineMacro("_OPENMP", "201307"); 1276 break; 1277 case 45: 1278 Builder.defineMacro("_OPENMP", "201511"); 1279 break; 1280 case 50: 1281 Builder.defineMacro("_OPENMP", "201811"); 1282 break; 1283 case 52: 1284 Builder.defineMacro("_OPENMP", "202111"); 1285 break; 1286 default: // case 51: 1287 // Default version is OpenMP 5.1 1288 Builder.defineMacro("_OPENMP", "202011"); 1289 break; 1290 } 1291 } 1292 1293 // CUDA device path compilaton 1294 if (LangOpts.CUDAIsDevice && !LangOpts.HIP) { 1295 // The CUDA_ARCH value is set for the GPU target specified in the NVPTX 1296 // backend's target defines. 1297 Builder.defineMacro("__CUDA_ARCH__"); 1298 } 1299 1300 // We need to communicate this to our CUDA header wrapper, which in turn 1301 // informs the proper CUDA headers of this choice. 1302 if (LangOpts.CUDADeviceApproxTranscendentals || LangOpts.FastMath) { 1303 Builder.defineMacro("__CLANG_CUDA_APPROX_TRANSCENDENTALS__"); 1304 } 1305 1306 // Define a macro indicating that the source file is being compiled with a 1307 // SYCL device compiler which doesn't produce host binary. 1308 if (LangOpts.SYCLIsDevice) { 1309 Builder.defineMacro("__SYCL_DEVICE_ONLY__", "1"); 1310 } 1311 1312 // OpenCL definitions. 1313 if (LangOpts.OpenCL) { 1314 InitializeOpenCLFeatureTestMacros(TI, LangOpts, Builder); 1315 1316 if (TI.getTriple().isSPIR() || TI.getTriple().isSPIRV()) 1317 Builder.defineMacro("__IMAGE_SUPPORT__"); 1318 } 1319 1320 if (TI.hasInt128Type() && LangOpts.CPlusPlus && LangOpts.GNUMode) { 1321 // For each extended integer type, g++ defines a macro mapping the 1322 // index of the type (0 in this case) in some list of extended types 1323 // to the type. 1324 Builder.defineMacro("__GLIBCXX_TYPE_INT_N_0", "__int128"); 1325 Builder.defineMacro("__GLIBCXX_BITSIZE_INT_N_0", "128"); 1326 } 1327 1328 // ELF targets define __ELF__ 1329 if (TI.getTriple().isOSBinFormatELF()) 1330 Builder.defineMacro("__ELF__"); 1331 1332 // Get other target #defines. 1333 TI.getTargetDefines(LangOpts, Builder); 1334 } 1335 1336 /// InitializePreprocessor - Initialize the preprocessor getting it and the 1337 /// environment ready to process a single file. 1338 void clang::InitializePreprocessor( 1339 Preprocessor &PP, const PreprocessorOptions &InitOpts, 1340 const PCHContainerReader &PCHContainerRdr, 1341 const FrontendOptions &FEOpts) { 1342 const LangOptions &LangOpts = PP.getLangOpts(); 1343 std::string PredefineBuffer; 1344 PredefineBuffer.reserve(4080); 1345 llvm::raw_string_ostream Predefines(PredefineBuffer); 1346 MacroBuilder Builder(Predefines); 1347 1348 // Emit line markers for various builtin sections of the file. The 3 here 1349 // marks <built-in> as being a system header, which suppresses warnings when 1350 // the same macro is defined multiple times. 1351 Builder.append("# 1 \"<built-in>\" 3"); 1352 1353 // Install things like __POWERPC__, __GNUC__, etc into the macro table. 1354 if (InitOpts.UsePredefines) { 1355 // FIXME: This will create multiple definitions for most of the predefined 1356 // macros. This is not the right way to handle this. 1357 if ((LangOpts.CUDA || LangOpts.OpenMPIsTargetDevice || 1358 LangOpts.SYCLIsDevice) && 1359 PP.getAuxTargetInfo()) 1360 InitializePredefinedMacros(*PP.getAuxTargetInfo(), LangOpts, FEOpts, 1361 PP.getPreprocessorOpts(), Builder); 1362 1363 InitializePredefinedMacros(PP.getTargetInfo(), LangOpts, FEOpts, 1364 PP.getPreprocessorOpts(), Builder); 1365 1366 // Install definitions to make Objective-C++ ARC work well with various 1367 // C++ Standard Library implementations. 1368 if (LangOpts.ObjC && LangOpts.CPlusPlus && 1369 (LangOpts.ObjCAutoRefCount || LangOpts.ObjCWeak)) { 1370 switch (InitOpts.ObjCXXARCStandardLibrary) { 1371 case ARCXX_nolib: 1372 case ARCXX_libcxx: 1373 break; 1374 1375 case ARCXX_libstdcxx: 1376 AddObjCXXARCLibstdcxxDefines(LangOpts, Builder); 1377 break; 1378 } 1379 } 1380 } 1381 1382 // Even with predefines off, some macros are still predefined. 1383 // These should all be defined in the preprocessor according to the 1384 // current language configuration. 1385 InitializeStandardPredefinedMacros(PP.getTargetInfo(), PP.getLangOpts(), 1386 FEOpts, Builder); 1387 1388 // Add on the predefines from the driver. Wrap in a #line directive to report 1389 // that they come from the command line. 1390 Builder.append("# 1 \"<command line>\" 1"); 1391 1392 // Process #define's and #undef's in the order they are given. 1393 for (unsigned i = 0, e = InitOpts.Macros.size(); i != e; ++i) { 1394 if (InitOpts.Macros[i].second) // isUndef 1395 Builder.undefineMacro(InitOpts.Macros[i].first); 1396 else 1397 DefineBuiltinMacro(Builder, InitOpts.Macros[i].first, 1398 PP.getDiagnostics()); 1399 } 1400 1401 // Exit the command line and go back to <built-in> (2 is LC_LEAVE). 1402 Builder.append("# 1 \"<built-in>\" 2"); 1403 1404 // If -imacros are specified, include them now. These are processed before 1405 // any -include directives. 1406 for (unsigned i = 0, e = InitOpts.MacroIncludes.size(); i != e; ++i) 1407 AddImplicitIncludeMacros(Builder, InitOpts.MacroIncludes[i]); 1408 1409 // Process -include-pch/-include-pth directives. 1410 if (!InitOpts.ImplicitPCHInclude.empty()) 1411 AddImplicitIncludePCH(Builder, PP, PCHContainerRdr, 1412 InitOpts.ImplicitPCHInclude); 1413 1414 // Process -include directives. 1415 for (unsigned i = 0, e = InitOpts.Includes.size(); i != e; ++i) { 1416 const std::string &Path = InitOpts.Includes[i]; 1417 AddImplicitInclude(Builder, Path); 1418 } 1419 1420 // Instruct the preprocessor to skip the preamble. 1421 PP.setSkipMainFilePreamble(InitOpts.PrecompiledPreambleBytes.first, 1422 InitOpts.PrecompiledPreambleBytes.second); 1423 1424 // Copy PredefinedBuffer into the Preprocessor. 1425 PP.setPredefines(std::move(PredefineBuffer)); 1426 } 1427