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 // FIXME: Use correct value for C++23. 455 if (LangOpts.CPlusPlus2b) 456 Builder.defineMacro("__cplusplus", "202101L"); 457 // [C++20] The integer literal 202002L. 458 else if (LangOpts.CPlusPlus20) 459 Builder.defineMacro("__cplusplus", "202002L"); 460 // [C++17] The integer literal 201703L. 461 else if (LangOpts.CPlusPlus17) 462 Builder.defineMacro("__cplusplus", "201703L"); 463 // [C++14] The name __cplusplus is defined to the value 201402L when 464 // compiling a C++ translation unit. 465 else if (LangOpts.CPlusPlus14) 466 Builder.defineMacro("__cplusplus", "201402L"); 467 // [C++11] The name __cplusplus is defined to the value 201103L when 468 // compiling a C++ translation unit. 469 else if (LangOpts.CPlusPlus11) 470 Builder.defineMacro("__cplusplus", "201103L"); 471 // [C++03] The name __cplusplus is defined to the value 199711L when 472 // compiling a C++ translation unit. 473 else 474 Builder.defineMacro("__cplusplus", "199711L"); 475 476 // -- __STDCPP_DEFAULT_NEW_ALIGNMENT__ 477 // [C++17] An integer literal of type std::size_t whose value is the 478 // alignment guaranteed by a call to operator new(std::size_t) 479 // 480 // We provide this in all language modes, since it seems generally useful. 481 Builder.defineMacro("__STDCPP_DEFAULT_NEW_ALIGNMENT__", 482 Twine(TI.getNewAlign() / TI.getCharWidth()) + 483 TI.getTypeConstantSuffix(TI.getSizeType())); 484 485 // -- __STDCPP_ÂTHREADS__ 486 // Defined, and has the value integer literal 1, if and only if a 487 // program can have more than one thread of execution. 488 if (LangOpts.getThreadModel() == LangOptions::ThreadModelKind::POSIX) 489 Builder.defineMacro("__STDCPP_THREADS__", "1"); 490 } 491 492 // In C11 these are environment macros. In C++11 they are only defined 493 // as part of <cuchar>. To prevent breakage when mixing C and C++ 494 // code, define these macros unconditionally. We can define them 495 // unconditionally, as Clang always uses UTF-16 and UTF-32 for 16-bit 496 // and 32-bit character literals. 497 Builder.defineMacro("__STDC_UTF_16__", "1"); 498 Builder.defineMacro("__STDC_UTF_32__", "1"); 499 500 if (LangOpts.ObjC) 501 Builder.defineMacro("__OBJC__"); 502 503 // OpenCL v1.0/1.1 s6.9, v1.2/2.0 s6.10: Preprocessor Directives and Macros. 504 if (LangOpts.OpenCL) { 505 if (LangOpts.CPlusPlus) { 506 switch (LangOpts.OpenCLCPlusPlusVersion) { 507 case 100: 508 Builder.defineMacro("__OPENCL_CPP_VERSION__", "100"); 509 break; 510 case 202100: 511 Builder.defineMacro("__OPENCL_CPP_VERSION__", "202100"); 512 break; 513 default: 514 llvm_unreachable("Unsupported C++ version for OpenCL"); 515 } 516 Builder.defineMacro("__CL_CPP_VERSION_1_0__", "100"); 517 Builder.defineMacro("__CL_CPP_VERSION_2021__", "202100"); 518 } else { 519 // OpenCL v1.0 and v1.1 do not have a predefined macro to indicate the 520 // language standard with which the program is compiled. __OPENCL_VERSION__ 521 // is for the OpenCL version supported by the OpenCL device, which is not 522 // necessarily the language standard with which the program is compiled. 523 // A shared OpenCL header file requires a macro to indicate the language 524 // standard. As a workaround, __OPENCL_C_VERSION__ is defined for 525 // OpenCL v1.0 and v1.1. 526 switch (LangOpts.OpenCLVersion) { 527 case 100: 528 Builder.defineMacro("__OPENCL_C_VERSION__", "100"); 529 break; 530 case 110: 531 Builder.defineMacro("__OPENCL_C_VERSION__", "110"); 532 break; 533 case 120: 534 Builder.defineMacro("__OPENCL_C_VERSION__", "120"); 535 break; 536 case 200: 537 Builder.defineMacro("__OPENCL_C_VERSION__", "200"); 538 break; 539 case 300: 540 Builder.defineMacro("__OPENCL_C_VERSION__", "300"); 541 break; 542 default: 543 llvm_unreachable("Unsupported OpenCL version"); 544 } 545 } 546 Builder.defineMacro("CL_VERSION_1_0", "100"); 547 Builder.defineMacro("CL_VERSION_1_1", "110"); 548 Builder.defineMacro("CL_VERSION_1_2", "120"); 549 Builder.defineMacro("CL_VERSION_2_0", "200"); 550 Builder.defineMacro("CL_VERSION_3_0", "300"); 551 552 if (TI.isLittleEndian()) 553 Builder.defineMacro("__ENDIAN_LITTLE__"); 554 555 if (LangOpts.FastRelaxedMath) 556 Builder.defineMacro("__FAST_RELAXED_MATH__"); 557 } 558 559 if (LangOpts.SYCLIsDevice || LangOpts.SYCLIsHost) { 560 // SYCL Version is set to a value when building SYCL applications 561 if (LangOpts.getSYCLVersion() == LangOptions::SYCL_2017) 562 Builder.defineMacro("CL_SYCL_LANGUAGE_VERSION", "121"); 563 else if (LangOpts.getSYCLVersion() == LangOptions::SYCL_2020) 564 Builder.defineMacro("SYCL_LANGUAGE_VERSION", "202001"); 565 } 566 567 // Not "standard" per se, but available even with the -undef flag. 568 if (LangOpts.AsmPreprocessor) 569 Builder.defineMacro("__ASSEMBLER__"); 570 if (LangOpts.CUDA) { 571 if (LangOpts.GPURelocatableDeviceCode) 572 Builder.defineMacro("__CLANG_RDC__"); 573 if (!LangOpts.HIP) 574 Builder.defineMacro("__CUDA__"); 575 } 576 if (LangOpts.HIP) { 577 Builder.defineMacro("__HIP__"); 578 Builder.defineMacro("__HIPCC__"); 579 Builder.defineMacro("__HIP_MEMORY_SCOPE_SINGLETHREAD", "1"); 580 Builder.defineMacro("__HIP_MEMORY_SCOPE_WAVEFRONT", "2"); 581 Builder.defineMacro("__HIP_MEMORY_SCOPE_WORKGROUP", "3"); 582 Builder.defineMacro("__HIP_MEMORY_SCOPE_AGENT", "4"); 583 Builder.defineMacro("__HIP_MEMORY_SCOPE_SYSTEM", "5"); 584 if (LangOpts.CUDAIsDevice) 585 Builder.defineMacro("__HIP_DEVICE_COMPILE__"); 586 if (LangOpts.GPUDefaultStream == 587 LangOptions::GPUDefaultStreamKind::PerThread) 588 Builder.defineMacro("HIP_API_PER_THREAD_DEFAULT_STREAM"); 589 } 590 } 591 592 /// Initialize the predefined C++ language feature test macros defined in 593 /// ISO/IEC JTC1/SC22/WG21 (C++) SD-6: "SG10 Feature Test Recommendations". 594 static void InitializeCPlusPlusFeatureTestMacros(const LangOptions &LangOpts, 595 MacroBuilder &Builder) { 596 // C++98 features. 597 if (LangOpts.RTTI) 598 Builder.defineMacro("__cpp_rtti", "199711L"); 599 if (LangOpts.CXXExceptions) 600 Builder.defineMacro("__cpp_exceptions", "199711L"); 601 602 // C++11 features. 603 if (LangOpts.CPlusPlus11) { 604 Builder.defineMacro("__cpp_unicode_characters", "200704L"); 605 Builder.defineMacro("__cpp_raw_strings", "200710L"); 606 Builder.defineMacro("__cpp_unicode_literals", "200710L"); 607 Builder.defineMacro("__cpp_user_defined_literals", "200809L"); 608 Builder.defineMacro("__cpp_lambdas", "200907L"); 609 Builder.defineMacro("__cpp_constexpr", LangOpts.CPlusPlus2b ? "202211L" 610 : LangOpts.CPlusPlus20 ? "201907L" 611 : LangOpts.CPlusPlus17 ? "201603L" 612 : LangOpts.CPlusPlus14 ? "201304L" 613 : "200704"); 614 Builder.defineMacro("__cpp_constexpr_in_decltype", "201711L"); 615 Builder.defineMacro("__cpp_range_based_for", 616 LangOpts.CPlusPlus17 ? "201603L" : "200907"); 617 Builder.defineMacro("__cpp_static_assert", 618 LangOpts.CPlusPlus17 ? "201411L" : "200410"); 619 Builder.defineMacro("__cpp_decltype", "200707L"); 620 Builder.defineMacro("__cpp_attributes", "200809L"); 621 Builder.defineMacro("__cpp_rvalue_references", "200610L"); 622 Builder.defineMacro("__cpp_variadic_templates", "200704L"); 623 Builder.defineMacro("__cpp_initializer_lists", "200806L"); 624 Builder.defineMacro("__cpp_delegating_constructors", "200604L"); 625 Builder.defineMacro("__cpp_nsdmi", "200809L"); 626 Builder.defineMacro("__cpp_inheriting_constructors", "201511L"); 627 Builder.defineMacro("__cpp_ref_qualifiers", "200710L"); 628 Builder.defineMacro("__cpp_alias_templates", "200704L"); 629 } 630 if (LangOpts.ThreadsafeStatics) 631 Builder.defineMacro("__cpp_threadsafe_static_init", "200806L"); 632 633 // C++14 features. 634 if (LangOpts.CPlusPlus14) { 635 Builder.defineMacro("__cpp_binary_literals", "201304L"); 636 Builder.defineMacro("__cpp_digit_separators", "201309L"); 637 Builder.defineMacro("__cpp_init_captures", 638 LangOpts.CPlusPlus20 ? "201803L" : "201304L"); 639 Builder.defineMacro("__cpp_generic_lambdas", 640 LangOpts.CPlusPlus20 ? "201707L" : "201304L"); 641 Builder.defineMacro("__cpp_decltype_auto", "201304L"); 642 Builder.defineMacro("__cpp_return_type_deduction", "201304L"); 643 Builder.defineMacro("__cpp_aggregate_nsdmi", "201304L"); 644 Builder.defineMacro("__cpp_variable_templates", "201304L"); 645 } 646 if (LangOpts.SizedDeallocation) 647 Builder.defineMacro("__cpp_sized_deallocation", "201309L"); 648 649 // C++17 features. 650 if (LangOpts.CPlusPlus17) { 651 Builder.defineMacro("__cpp_hex_float", "201603L"); 652 Builder.defineMacro("__cpp_inline_variables", "201606L"); 653 Builder.defineMacro("__cpp_noexcept_function_type", "201510L"); 654 Builder.defineMacro("__cpp_capture_star_this", "201603L"); 655 Builder.defineMacro("__cpp_if_constexpr", "201606L"); 656 Builder.defineMacro("__cpp_deduction_guides", "201703L"); // (not latest) 657 Builder.defineMacro("__cpp_template_auto", "201606L"); // (old name) 658 Builder.defineMacro("__cpp_namespace_attributes", "201411L"); 659 Builder.defineMacro("__cpp_enumerator_attributes", "201411L"); 660 Builder.defineMacro("__cpp_nested_namespace_definitions", "201411L"); 661 Builder.defineMacro("__cpp_variadic_using", "201611L"); 662 Builder.defineMacro("__cpp_aggregate_bases", "201603L"); 663 Builder.defineMacro("__cpp_structured_bindings", "201606L"); 664 Builder.defineMacro("__cpp_nontype_template_args", 665 "201411L"); // (not latest) 666 Builder.defineMacro("__cpp_fold_expressions", "201603L"); 667 Builder.defineMacro("__cpp_guaranteed_copy_elision", "201606L"); 668 Builder.defineMacro("__cpp_nontype_template_parameter_auto", "201606L"); 669 } 670 if (LangOpts.AlignedAllocation && !LangOpts.AlignedAllocationUnavailable) 671 Builder.defineMacro("__cpp_aligned_new", "201606L"); 672 if (LangOpts.RelaxedTemplateTemplateArgs) 673 Builder.defineMacro("__cpp_template_template_args", "201611L"); 674 675 // C++20 features. 676 if (LangOpts.CPlusPlus20) { 677 Builder.defineMacro("__cpp_aggregate_paren_init", "201902L"); 678 679 // P0848 is implemented, but we're still waiting for other concepts 680 // issues to be addressed before bumping __cpp_concepts up to 202002L. 681 // Refer to the discussion of this at https://reviews.llvm.org/D128619. 682 Builder.defineMacro("__cpp_concepts", "201907L"); 683 Builder.defineMacro("__cpp_conditional_explicit", "201806L"); 684 //Builder.defineMacro("__cpp_consteval", "201811L"); 685 Builder.defineMacro("__cpp_constexpr_dynamic_alloc", "201907L"); 686 Builder.defineMacro("__cpp_constinit", "201907L"); 687 Builder.defineMacro("__cpp_impl_coroutine", "201902L"); 688 Builder.defineMacro("__cpp_designated_initializers", "201707L"); 689 Builder.defineMacro("__cpp_impl_three_way_comparison", "201907L"); 690 //Builder.defineMacro("__cpp_modules", "201907L"); 691 Builder.defineMacro("__cpp_using_enum", "201907L"); 692 } 693 // C++2b features. 694 if (LangOpts.CPlusPlus2b) { 695 Builder.defineMacro("__cpp_implicit_move", "202011L"); 696 Builder.defineMacro("__cpp_size_t_suffix", "202011L"); 697 Builder.defineMacro("__cpp_if_consteval", "202106L"); 698 Builder.defineMacro("__cpp_multidimensional_subscript", "202211L"); 699 } 700 701 // We provide those C++2b features as extensions in earlier language modes, so 702 // we also define their feature test macros. 703 if (LangOpts.CPlusPlus11) 704 Builder.defineMacro("__cpp_static_call_operator", "202207L"); 705 Builder.defineMacro("__cpp_named_character_escapes", "202207L"); 706 707 if (LangOpts.Char8) 708 Builder.defineMacro("__cpp_char8_t", "202207L"); 709 Builder.defineMacro("__cpp_impl_destroying_delete", "201806L"); 710 711 // TS features. 712 if (LangOpts.Coroutines) 713 Builder.defineMacro("__cpp_coroutines", "201703L"); 714 } 715 716 /// InitializeOpenCLFeatureTestMacros - Define OpenCL macros based on target 717 /// settings and language version 718 void InitializeOpenCLFeatureTestMacros(const TargetInfo &TI, 719 const LangOptions &Opts, 720 MacroBuilder &Builder) { 721 const llvm::StringMap<bool> &OpenCLFeaturesMap = TI.getSupportedOpenCLOpts(); 722 // FIXME: OpenCL options which affect language semantics/syntax 723 // should be moved into LangOptions. 724 auto defineOpenCLExtMacro = [&](llvm::StringRef Name, auto... OptArgs) { 725 // Check if extension is supported by target and is available in this 726 // OpenCL version 727 if (TI.hasFeatureEnabled(OpenCLFeaturesMap, Name) && 728 OpenCLOptions::isOpenCLOptionAvailableIn(Opts, OptArgs...)) 729 Builder.defineMacro(Name); 730 }; 731 #define OPENCL_GENERIC_EXTENSION(Ext, ...) \ 732 defineOpenCLExtMacro(#Ext, __VA_ARGS__); 733 #include "clang/Basic/OpenCLExtensions.def" 734 735 // Assume compiling for FULL profile 736 Builder.defineMacro("__opencl_c_int64"); 737 } 738 739 static void InitializePredefinedMacros(const TargetInfo &TI, 740 const LangOptions &LangOpts, 741 const FrontendOptions &FEOpts, 742 const PreprocessorOptions &PPOpts, 743 MacroBuilder &Builder) { 744 // Compiler version introspection macros. 745 Builder.defineMacro("__llvm__"); // LLVM Backend 746 Builder.defineMacro("__clang__"); // Clang Frontend 747 #define TOSTR2(X) #X 748 #define TOSTR(X) TOSTR2(X) 749 Builder.defineMacro("__clang_major__", TOSTR(CLANG_VERSION_MAJOR)); 750 Builder.defineMacro("__clang_minor__", TOSTR(CLANG_VERSION_MINOR)); 751 Builder.defineMacro("__clang_patchlevel__", TOSTR(CLANG_VERSION_PATCHLEVEL)); 752 #undef TOSTR 753 #undef TOSTR2 754 Builder.defineMacro("__clang_version__", 755 "\"" CLANG_VERSION_STRING " " 756 + getClangFullRepositoryVersion() + "\""); 757 758 if (LangOpts.GNUCVersion != 0) { 759 // Major, minor, patch, are given two decimal places each, so 4.2.1 becomes 760 // 40201. 761 unsigned GNUCMajor = LangOpts.GNUCVersion / 100 / 100; 762 unsigned GNUCMinor = LangOpts.GNUCVersion / 100 % 100; 763 unsigned GNUCPatch = LangOpts.GNUCVersion % 100; 764 Builder.defineMacro("__GNUC__", Twine(GNUCMajor)); 765 Builder.defineMacro("__GNUC_MINOR__", Twine(GNUCMinor)); 766 Builder.defineMacro("__GNUC_PATCHLEVEL__", Twine(GNUCPatch)); 767 Builder.defineMacro("__GXX_ABI_VERSION", "1002"); 768 769 if (LangOpts.CPlusPlus) { 770 Builder.defineMacro("__GNUG__", Twine(GNUCMajor)); 771 Builder.defineMacro("__GXX_WEAK__"); 772 } 773 } 774 775 // Define macros for the C11 / C++11 memory orderings 776 Builder.defineMacro("__ATOMIC_RELAXED", "0"); 777 Builder.defineMacro("__ATOMIC_CONSUME", "1"); 778 Builder.defineMacro("__ATOMIC_ACQUIRE", "2"); 779 Builder.defineMacro("__ATOMIC_RELEASE", "3"); 780 Builder.defineMacro("__ATOMIC_ACQ_REL", "4"); 781 Builder.defineMacro("__ATOMIC_SEQ_CST", "5"); 782 783 // Define macros for the OpenCL memory scope. 784 // The values should match AtomicScopeOpenCLModel::ID enum. 785 static_assert( 786 static_cast<unsigned>(AtomicScopeOpenCLModel::WorkGroup) == 1 && 787 static_cast<unsigned>(AtomicScopeOpenCLModel::Device) == 2 && 788 static_cast<unsigned>(AtomicScopeOpenCLModel::AllSVMDevices) == 3 && 789 static_cast<unsigned>(AtomicScopeOpenCLModel::SubGroup) == 4, 790 "Invalid OpenCL memory scope enum definition"); 791 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_WORK_ITEM", "0"); 792 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_WORK_GROUP", "1"); 793 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_DEVICE", "2"); 794 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_ALL_SVM_DEVICES", "3"); 795 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_SUB_GROUP", "4"); 796 797 // Support for #pragma redefine_extname (Sun compatibility) 798 Builder.defineMacro("__PRAGMA_REDEFINE_EXTNAME", "1"); 799 800 // Previously this macro was set to a string aiming to achieve compatibility 801 // with GCC 4.2.1. Now, just return the full Clang version 802 Builder.defineMacro("__VERSION__", "\"" + 803 Twine(getClangFullCPPVersion()) + "\""); 804 805 // Initialize language-specific preprocessor defines. 806 807 // Standard conforming mode? 808 if (!LangOpts.GNUMode && !LangOpts.MSVCCompat) 809 Builder.defineMacro("__STRICT_ANSI__"); 810 811 if (LangOpts.GNUCVersion && LangOpts.CPlusPlus11) 812 Builder.defineMacro("__GXX_EXPERIMENTAL_CXX0X__"); 813 814 if (LangOpts.ObjC) { 815 if (LangOpts.ObjCRuntime.isNonFragile()) { 816 Builder.defineMacro("__OBJC2__"); 817 818 if (LangOpts.ObjCExceptions) 819 Builder.defineMacro("OBJC_ZEROCOST_EXCEPTIONS"); 820 } 821 822 if (LangOpts.getGC() != LangOptions::NonGC) 823 Builder.defineMacro("__OBJC_GC__"); 824 825 if (LangOpts.ObjCRuntime.isNeXTFamily()) 826 Builder.defineMacro("__NEXT_RUNTIME__"); 827 828 if (LangOpts.ObjCRuntime.getKind() == ObjCRuntime::GNUstep) { 829 auto version = LangOpts.ObjCRuntime.getVersion(); 830 std::string versionString = "1"; 831 // Don't rely on the tuple argument, because we can be asked to target 832 // later ABIs than we actually support, so clamp these values to those 833 // currently supported 834 if (version >= VersionTuple(2, 0)) 835 Builder.defineMacro("__OBJC_GNUSTEP_RUNTIME_ABI__", "20"); 836 else 837 Builder.defineMacro( 838 "__OBJC_GNUSTEP_RUNTIME_ABI__", 839 "1" + Twine(std::min(8U, version.getMinor().value_or(0)))); 840 } 841 842 if (LangOpts.ObjCRuntime.getKind() == ObjCRuntime::ObjFW) { 843 VersionTuple tuple = LangOpts.ObjCRuntime.getVersion(); 844 unsigned minor = tuple.getMinor().value_or(0); 845 unsigned subminor = tuple.getSubminor().value_or(0); 846 Builder.defineMacro("__OBJFW_RUNTIME_ABI__", 847 Twine(tuple.getMajor() * 10000 + minor * 100 + 848 subminor)); 849 } 850 851 Builder.defineMacro("IBOutlet", "__attribute__((iboutlet))"); 852 Builder.defineMacro("IBOutletCollection(ClassName)", 853 "__attribute__((iboutletcollection(ClassName)))"); 854 Builder.defineMacro("IBAction", "void)__attribute__((ibaction)"); 855 Builder.defineMacro("IBInspectable", ""); 856 Builder.defineMacro("IB_DESIGNABLE", ""); 857 } 858 859 // Define a macro that describes the Objective-C boolean type even for C 860 // and C++ since BOOL can be used from non Objective-C code. 861 Builder.defineMacro("__OBJC_BOOL_IS_BOOL", 862 Twine(TI.useSignedCharForObjCBool() ? "0" : "1")); 863 864 if (LangOpts.CPlusPlus) 865 InitializeCPlusPlusFeatureTestMacros(LangOpts, Builder); 866 867 // darwin_constant_cfstrings controls this. This is also dependent 868 // on other things like the runtime I believe. This is set even for C code. 869 if (!LangOpts.NoConstantCFStrings) 870 Builder.defineMacro("__CONSTANT_CFSTRINGS__"); 871 872 if (LangOpts.ObjC) 873 Builder.defineMacro("OBJC_NEW_PROPERTIES"); 874 875 if (LangOpts.PascalStrings) 876 Builder.defineMacro("__PASCAL_STRINGS__"); 877 878 if (LangOpts.Blocks) { 879 Builder.defineMacro("__block", "__attribute__((__blocks__(byref)))"); 880 Builder.defineMacro("__BLOCKS__"); 881 } 882 883 if (!LangOpts.MSVCCompat && LangOpts.Exceptions) 884 Builder.defineMacro("__EXCEPTIONS"); 885 if (LangOpts.GNUCVersion && LangOpts.RTTI) 886 Builder.defineMacro("__GXX_RTTI"); 887 888 if (LangOpts.hasSjLjExceptions()) 889 Builder.defineMacro("__USING_SJLJ_EXCEPTIONS__"); 890 else if (LangOpts.hasSEHExceptions()) 891 Builder.defineMacro("__SEH__"); 892 else if (LangOpts.hasDWARFExceptions() && 893 (TI.getTriple().isThumb() || TI.getTriple().isARM())) 894 Builder.defineMacro("__ARM_DWARF_EH__"); 895 896 if (LangOpts.Deprecated) 897 Builder.defineMacro("__DEPRECATED"); 898 899 if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus) 900 Builder.defineMacro("__private_extern__", "extern"); 901 902 if (LangOpts.MicrosoftExt) { 903 if (LangOpts.WChar) { 904 // wchar_t supported as a keyword. 905 Builder.defineMacro("_WCHAR_T_DEFINED"); 906 Builder.defineMacro("_NATIVE_WCHAR_T_DEFINED"); 907 } 908 } 909 910 // Macros to help identify the narrow and wide character sets 911 // FIXME: clang currently ignores -fexec-charset=. If this changes, 912 // then this may need to be updated. 913 Builder.defineMacro("__clang_literal_encoding__", "\"UTF-8\""); 914 if (TI.getTypeWidth(TI.getWCharType()) >= 32) { 915 // FIXME: 32-bit wchar_t signals UTF-32. This may change 916 // if -fwide-exec-charset= is ever supported. 917 Builder.defineMacro("__clang_wide_literal_encoding__", "\"UTF-32\""); 918 } else { 919 // FIXME: Less-than 32-bit wchar_t generally means UTF-16 920 // (e.g., Windows, 32-bit IBM). This may need to be 921 // updated if -fwide-exec-charset= is ever supported. 922 Builder.defineMacro("__clang_wide_literal_encoding__", "\"UTF-16\""); 923 } 924 925 if (LangOpts.Optimize) 926 Builder.defineMacro("__OPTIMIZE__"); 927 if (LangOpts.OptimizeSize) 928 Builder.defineMacro("__OPTIMIZE_SIZE__"); 929 930 if (LangOpts.FastMath) 931 Builder.defineMacro("__FAST_MATH__"); 932 933 // Initialize target-specific preprocessor defines. 934 935 // __BYTE_ORDER__ was added in GCC 4.6. It's analogous 936 // to the macro __BYTE_ORDER (no trailing underscores) 937 // from glibc's <endian.h> header. 938 // We don't support the PDP-11 as a target, but include 939 // the define so it can still be compared against. 940 Builder.defineMacro("__ORDER_LITTLE_ENDIAN__", "1234"); 941 Builder.defineMacro("__ORDER_BIG_ENDIAN__", "4321"); 942 Builder.defineMacro("__ORDER_PDP_ENDIAN__", "3412"); 943 if (TI.isBigEndian()) { 944 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_BIG_ENDIAN__"); 945 Builder.defineMacro("__BIG_ENDIAN__"); 946 } else { 947 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_LITTLE_ENDIAN__"); 948 Builder.defineMacro("__LITTLE_ENDIAN__"); 949 } 950 951 if (TI.getPointerWidth(LangAS::Default) == 64 && TI.getLongWidth() == 64 && 952 TI.getIntWidth() == 32) { 953 Builder.defineMacro("_LP64"); 954 Builder.defineMacro("__LP64__"); 955 } 956 957 if (TI.getPointerWidth(LangAS::Default) == 32 && TI.getLongWidth() == 32 && 958 TI.getIntWidth() == 32) { 959 Builder.defineMacro("_ILP32"); 960 Builder.defineMacro("__ILP32__"); 961 } 962 963 // Define type sizing macros based on the target properties. 964 assert(TI.getCharWidth() == 8 && "Only support 8-bit char so far"); 965 Builder.defineMacro("__CHAR_BIT__", Twine(TI.getCharWidth())); 966 967 Builder.defineMacro("__BOOL_WIDTH__", Twine(TI.getBoolWidth())); 968 Builder.defineMacro("__SHRT_WIDTH__", Twine(TI.getShortWidth())); 969 Builder.defineMacro("__INT_WIDTH__", Twine(TI.getIntWidth())); 970 Builder.defineMacro("__LONG_WIDTH__", Twine(TI.getLongWidth())); 971 Builder.defineMacro("__LLONG_WIDTH__", Twine(TI.getLongLongWidth())); 972 973 size_t BitIntMaxWidth = TI.getMaxBitIntWidth(); 974 assert(BitIntMaxWidth <= llvm::IntegerType::MAX_INT_BITS && 975 "Target defined a max bit width larger than LLVM can support!"); 976 assert(BitIntMaxWidth >= TI.getLongLongWidth() && 977 "Target defined a max bit width smaller than the C standard allows!"); 978 Builder.defineMacro("__BITINT_MAXWIDTH__", Twine(BitIntMaxWidth)); 979 980 DefineTypeSize("__SCHAR_MAX__", TargetInfo::SignedChar, TI, Builder); 981 DefineTypeSize("__SHRT_MAX__", TargetInfo::SignedShort, TI, Builder); 982 DefineTypeSize("__INT_MAX__", TargetInfo::SignedInt, TI, Builder); 983 DefineTypeSize("__LONG_MAX__", TargetInfo::SignedLong, TI, Builder); 984 DefineTypeSize("__LONG_LONG_MAX__", TargetInfo::SignedLongLong, TI, Builder); 985 DefineTypeSizeAndWidth("__WCHAR", TI.getWCharType(), TI, Builder); 986 DefineTypeSizeAndWidth("__WINT", TI.getWIntType(), TI, Builder); 987 DefineTypeSizeAndWidth("__INTMAX", TI.getIntMaxType(), TI, Builder); 988 DefineTypeSizeAndWidth("__SIZE", TI.getSizeType(), TI, Builder); 989 990 DefineTypeSizeAndWidth("__UINTMAX", TI.getUIntMaxType(), TI, Builder); 991 DefineTypeSizeAndWidth("__PTRDIFF", TI.getPtrDiffType(LangAS::Default), TI, 992 Builder); 993 DefineTypeSizeAndWidth("__INTPTR", TI.getIntPtrType(), TI, Builder); 994 DefineTypeSizeAndWidth("__UINTPTR", TI.getUIntPtrType(), TI, Builder); 995 996 DefineTypeSizeof("__SIZEOF_DOUBLE__", TI.getDoubleWidth(), TI, Builder); 997 DefineTypeSizeof("__SIZEOF_FLOAT__", TI.getFloatWidth(), TI, Builder); 998 DefineTypeSizeof("__SIZEOF_INT__", TI.getIntWidth(), TI, Builder); 999 DefineTypeSizeof("__SIZEOF_LONG__", TI.getLongWidth(), TI, Builder); 1000 DefineTypeSizeof("__SIZEOF_LONG_DOUBLE__",TI.getLongDoubleWidth(),TI,Builder); 1001 DefineTypeSizeof("__SIZEOF_LONG_LONG__", TI.getLongLongWidth(), TI, Builder); 1002 DefineTypeSizeof("__SIZEOF_POINTER__", TI.getPointerWidth(LangAS::Default), 1003 TI, Builder); 1004 DefineTypeSizeof("__SIZEOF_SHORT__", TI.getShortWidth(), TI, Builder); 1005 DefineTypeSizeof("__SIZEOF_PTRDIFF_T__", 1006 TI.getTypeWidth(TI.getPtrDiffType(LangAS::Default)), TI, 1007 Builder); 1008 DefineTypeSizeof("__SIZEOF_SIZE_T__", 1009 TI.getTypeWidth(TI.getSizeType()), TI, Builder); 1010 DefineTypeSizeof("__SIZEOF_WCHAR_T__", 1011 TI.getTypeWidth(TI.getWCharType()), TI, Builder); 1012 DefineTypeSizeof("__SIZEOF_WINT_T__", 1013 TI.getTypeWidth(TI.getWIntType()), TI, Builder); 1014 if (TI.hasInt128Type()) 1015 DefineTypeSizeof("__SIZEOF_INT128__", 128, TI, Builder); 1016 1017 DefineType("__INTMAX_TYPE__", TI.getIntMaxType(), Builder); 1018 DefineFmt("__INTMAX", TI.getIntMaxType(), TI, Builder); 1019 Builder.defineMacro("__INTMAX_C_SUFFIX__", 1020 TI.getTypeConstantSuffix(TI.getIntMaxType())); 1021 DefineType("__UINTMAX_TYPE__", TI.getUIntMaxType(), Builder); 1022 DefineFmt("__UINTMAX", TI.getUIntMaxType(), TI, Builder); 1023 Builder.defineMacro("__UINTMAX_C_SUFFIX__", 1024 TI.getTypeConstantSuffix(TI.getUIntMaxType())); 1025 DefineType("__PTRDIFF_TYPE__", TI.getPtrDiffType(LangAS::Default), Builder); 1026 DefineFmt("__PTRDIFF", TI.getPtrDiffType(LangAS::Default), TI, Builder); 1027 DefineType("__INTPTR_TYPE__", TI.getIntPtrType(), Builder); 1028 DefineFmt("__INTPTR", TI.getIntPtrType(), TI, Builder); 1029 DefineType("__SIZE_TYPE__", TI.getSizeType(), Builder); 1030 DefineFmt("__SIZE", TI.getSizeType(), TI, Builder); 1031 DefineType("__WCHAR_TYPE__", TI.getWCharType(), Builder); 1032 DefineType("__WINT_TYPE__", TI.getWIntType(), Builder); 1033 DefineTypeSizeAndWidth("__SIG_ATOMIC", TI.getSigAtomicType(), TI, Builder); 1034 DefineType("__CHAR16_TYPE__", TI.getChar16Type(), Builder); 1035 DefineType("__CHAR32_TYPE__", TI.getChar32Type(), Builder); 1036 1037 DefineType("__UINTPTR_TYPE__", TI.getUIntPtrType(), Builder); 1038 DefineFmt("__UINTPTR", TI.getUIntPtrType(), TI, Builder); 1039 1040 // The C standard requires the width of uintptr_t and intptr_t to be the same, 1041 // per 7.20.2.4p1. Same for intmax_t and uintmax_t, per 7.20.2.5p1. 1042 assert(TI.getTypeWidth(TI.getUIntPtrType()) == 1043 TI.getTypeWidth(TI.getIntPtrType()) && 1044 "uintptr_t and intptr_t have different widths?"); 1045 assert(TI.getTypeWidth(TI.getUIntMaxType()) == 1046 TI.getTypeWidth(TI.getIntMaxType()) && 1047 "uintmax_t and intmax_t have different widths?"); 1048 1049 if (TI.hasFloat16Type()) 1050 DefineFloatMacros(Builder, "FLT16", &TI.getHalfFormat(), "F16"); 1051 DefineFloatMacros(Builder, "FLT", &TI.getFloatFormat(), "F"); 1052 DefineFloatMacros(Builder, "DBL", &TI.getDoubleFormat(), ""); 1053 DefineFloatMacros(Builder, "LDBL", &TI.getLongDoubleFormat(), "L"); 1054 1055 // Define a __POINTER_WIDTH__ macro for stdint.h. 1056 Builder.defineMacro("__POINTER_WIDTH__", 1057 Twine((int)TI.getPointerWidth(LangAS::Default))); 1058 1059 // Define __BIGGEST_ALIGNMENT__ to be compatible with gcc. 1060 Builder.defineMacro("__BIGGEST_ALIGNMENT__", 1061 Twine(TI.getSuitableAlign() / TI.getCharWidth()) ); 1062 1063 if (!LangOpts.CharIsSigned) 1064 Builder.defineMacro("__CHAR_UNSIGNED__"); 1065 1066 if (!TargetInfo::isTypeSigned(TI.getWCharType())) 1067 Builder.defineMacro("__WCHAR_UNSIGNED__"); 1068 1069 if (!TargetInfo::isTypeSigned(TI.getWIntType())) 1070 Builder.defineMacro("__WINT_UNSIGNED__"); 1071 1072 // Define exact-width integer types for stdint.h 1073 DefineExactWidthIntType(TargetInfo::SignedChar, TI, Builder); 1074 1075 if (TI.getShortWidth() > TI.getCharWidth()) 1076 DefineExactWidthIntType(TargetInfo::SignedShort, TI, Builder); 1077 1078 if (TI.getIntWidth() > TI.getShortWidth()) 1079 DefineExactWidthIntType(TargetInfo::SignedInt, TI, Builder); 1080 1081 if (TI.getLongWidth() > TI.getIntWidth()) 1082 DefineExactWidthIntType(TargetInfo::SignedLong, TI, Builder); 1083 1084 if (TI.getLongLongWidth() > TI.getLongWidth()) 1085 DefineExactWidthIntType(TargetInfo::SignedLongLong, TI, Builder); 1086 1087 DefineExactWidthIntType(TargetInfo::UnsignedChar, TI, Builder); 1088 DefineExactWidthIntTypeSize(TargetInfo::UnsignedChar, TI, Builder); 1089 DefineExactWidthIntTypeSize(TargetInfo::SignedChar, TI, Builder); 1090 1091 if (TI.getShortWidth() > TI.getCharWidth()) { 1092 DefineExactWidthIntType(TargetInfo::UnsignedShort, TI, Builder); 1093 DefineExactWidthIntTypeSize(TargetInfo::UnsignedShort, TI, Builder); 1094 DefineExactWidthIntTypeSize(TargetInfo::SignedShort, TI, Builder); 1095 } 1096 1097 if (TI.getIntWidth() > TI.getShortWidth()) { 1098 DefineExactWidthIntType(TargetInfo::UnsignedInt, TI, Builder); 1099 DefineExactWidthIntTypeSize(TargetInfo::UnsignedInt, TI, Builder); 1100 DefineExactWidthIntTypeSize(TargetInfo::SignedInt, TI, Builder); 1101 } 1102 1103 if (TI.getLongWidth() > TI.getIntWidth()) { 1104 DefineExactWidthIntType(TargetInfo::UnsignedLong, TI, Builder); 1105 DefineExactWidthIntTypeSize(TargetInfo::UnsignedLong, TI, Builder); 1106 DefineExactWidthIntTypeSize(TargetInfo::SignedLong, TI, Builder); 1107 } 1108 1109 if (TI.getLongLongWidth() > TI.getLongWidth()) { 1110 DefineExactWidthIntType(TargetInfo::UnsignedLongLong, TI, Builder); 1111 DefineExactWidthIntTypeSize(TargetInfo::UnsignedLongLong, TI, Builder); 1112 DefineExactWidthIntTypeSize(TargetInfo::SignedLongLong, TI, Builder); 1113 } 1114 1115 DefineLeastWidthIntType(8, true, TI, Builder); 1116 DefineLeastWidthIntType(8, false, TI, Builder); 1117 DefineLeastWidthIntType(16, true, TI, Builder); 1118 DefineLeastWidthIntType(16, false, TI, Builder); 1119 DefineLeastWidthIntType(32, true, TI, Builder); 1120 DefineLeastWidthIntType(32, false, TI, Builder); 1121 DefineLeastWidthIntType(64, true, TI, Builder); 1122 DefineLeastWidthIntType(64, false, TI, Builder); 1123 1124 DefineFastIntType(8, true, TI, Builder); 1125 DefineFastIntType(8, false, TI, Builder); 1126 DefineFastIntType(16, true, TI, Builder); 1127 DefineFastIntType(16, false, TI, Builder); 1128 DefineFastIntType(32, true, TI, Builder); 1129 DefineFastIntType(32, false, TI, Builder); 1130 DefineFastIntType(64, true, TI, Builder); 1131 DefineFastIntType(64, false, TI, Builder); 1132 1133 Builder.defineMacro("__USER_LABEL_PREFIX__", TI.getUserLabelPrefix()); 1134 1135 if (!LangOpts.MathErrno) 1136 Builder.defineMacro("__NO_MATH_ERRNO__"); 1137 1138 if (LangOpts.FastMath || LangOpts.FiniteMathOnly) 1139 Builder.defineMacro("__FINITE_MATH_ONLY__", "1"); 1140 else 1141 Builder.defineMacro("__FINITE_MATH_ONLY__", "0"); 1142 1143 if (LangOpts.GNUCVersion) { 1144 if (LangOpts.GNUInline || LangOpts.CPlusPlus) 1145 Builder.defineMacro("__GNUC_GNU_INLINE__"); 1146 else 1147 Builder.defineMacro("__GNUC_STDC_INLINE__"); 1148 1149 // The value written by __atomic_test_and_set. 1150 // FIXME: This is target-dependent. 1151 Builder.defineMacro("__GCC_ATOMIC_TEST_AND_SET_TRUEVAL", "1"); 1152 } 1153 1154 auto addLockFreeMacros = [&](const llvm::Twine &Prefix) { 1155 // Used by libc++ and libstdc++ to implement ATOMIC_<foo>_LOCK_FREE. 1156 #define DEFINE_LOCK_FREE_MACRO(TYPE, Type) \ 1157 Builder.defineMacro(Prefix + #TYPE "_LOCK_FREE", \ 1158 getLockFreeValue(TI.get##Type##Width(), TI)); 1159 DEFINE_LOCK_FREE_MACRO(BOOL, Bool); 1160 DEFINE_LOCK_FREE_MACRO(CHAR, Char); 1161 if (LangOpts.Char8) 1162 DEFINE_LOCK_FREE_MACRO(CHAR8_T, Char); // Treat char8_t like char. 1163 DEFINE_LOCK_FREE_MACRO(CHAR16_T, Char16); 1164 DEFINE_LOCK_FREE_MACRO(CHAR32_T, Char32); 1165 DEFINE_LOCK_FREE_MACRO(WCHAR_T, WChar); 1166 DEFINE_LOCK_FREE_MACRO(SHORT, Short); 1167 DEFINE_LOCK_FREE_MACRO(INT, Int); 1168 DEFINE_LOCK_FREE_MACRO(LONG, Long); 1169 DEFINE_LOCK_FREE_MACRO(LLONG, LongLong); 1170 Builder.defineMacro( 1171 Prefix + "POINTER_LOCK_FREE", 1172 getLockFreeValue(TI.getPointerWidth(LangAS::Default), TI)); 1173 #undef DEFINE_LOCK_FREE_MACRO 1174 }; 1175 addLockFreeMacros("__CLANG_ATOMIC_"); 1176 if (LangOpts.GNUCVersion) 1177 addLockFreeMacros("__GCC_ATOMIC_"); 1178 1179 if (LangOpts.NoInlineDefine) 1180 Builder.defineMacro("__NO_INLINE__"); 1181 1182 if (unsigned PICLevel = LangOpts.PICLevel) { 1183 Builder.defineMacro("__PIC__", Twine(PICLevel)); 1184 Builder.defineMacro("__pic__", Twine(PICLevel)); 1185 if (LangOpts.PIE) { 1186 Builder.defineMacro("__PIE__", Twine(PICLevel)); 1187 Builder.defineMacro("__pie__", Twine(PICLevel)); 1188 } 1189 } 1190 1191 // Macros to control C99 numerics and <float.h> 1192 Builder.defineMacro("__FLT_RADIX__", "2"); 1193 Builder.defineMacro("__DECIMAL_DIG__", "__LDBL_DECIMAL_DIG__"); 1194 1195 if (LangOpts.getStackProtector() == LangOptions::SSPOn) 1196 Builder.defineMacro("__SSP__"); 1197 else if (LangOpts.getStackProtector() == LangOptions::SSPStrong) 1198 Builder.defineMacro("__SSP_STRONG__", "2"); 1199 else if (LangOpts.getStackProtector() == LangOptions::SSPReq) 1200 Builder.defineMacro("__SSP_ALL__", "3"); 1201 1202 if (PPOpts.SetUpStaticAnalyzer) 1203 Builder.defineMacro("__clang_analyzer__"); 1204 1205 if (LangOpts.FastRelaxedMath) 1206 Builder.defineMacro("__FAST_RELAXED_MATH__"); 1207 1208 if (FEOpts.ProgramAction == frontend::RewriteObjC || 1209 LangOpts.getGC() != LangOptions::NonGC) { 1210 Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))"); 1211 Builder.defineMacro("__strong", "__attribute__((objc_gc(strong)))"); 1212 Builder.defineMacro("__autoreleasing", ""); 1213 Builder.defineMacro("__unsafe_unretained", ""); 1214 } else if (LangOpts.ObjC) { 1215 Builder.defineMacro("__weak", "__attribute__((objc_ownership(weak)))"); 1216 Builder.defineMacro("__strong", "__attribute__((objc_ownership(strong)))"); 1217 Builder.defineMacro("__autoreleasing", 1218 "__attribute__((objc_ownership(autoreleasing)))"); 1219 Builder.defineMacro("__unsafe_unretained", 1220 "__attribute__((objc_ownership(none)))"); 1221 } 1222 1223 // On Darwin, there are __double_underscored variants of the type 1224 // nullability qualifiers. 1225 if (TI.getTriple().isOSDarwin()) { 1226 Builder.defineMacro("__nonnull", "_Nonnull"); 1227 Builder.defineMacro("__null_unspecified", "_Null_unspecified"); 1228 Builder.defineMacro("__nullable", "_Nullable"); 1229 } 1230 1231 // Add a macro to differentiate between regular iOS/tvOS/watchOS targets and 1232 // the corresponding simulator targets. 1233 if (TI.getTriple().isOSDarwin() && TI.getTriple().isSimulatorEnvironment()) 1234 Builder.defineMacro("__APPLE_EMBEDDED_SIMULATOR__", "1"); 1235 1236 // OpenMP definition 1237 // OpenMP 2.2: 1238 // In implementations that support a preprocessor, the _OPENMP 1239 // macro name is defined to have the decimal value yyyymm where 1240 // yyyy and mm are the year and the month designations of the 1241 // version of the OpenMP API that the implementation support. 1242 if (!LangOpts.OpenMPSimd) { 1243 switch (LangOpts.OpenMP) { 1244 case 0: 1245 break; 1246 case 31: 1247 Builder.defineMacro("_OPENMP", "201107"); 1248 break; 1249 case 40: 1250 Builder.defineMacro("_OPENMP", "201307"); 1251 break; 1252 case 45: 1253 Builder.defineMacro("_OPENMP", "201511"); 1254 break; 1255 case 51: 1256 Builder.defineMacro("_OPENMP", "202011"); 1257 break; 1258 case 52: 1259 Builder.defineMacro("_OPENMP", "202111"); 1260 break; 1261 case 50: 1262 default: 1263 // Default version is OpenMP 5.0 1264 Builder.defineMacro("_OPENMP", "201811"); 1265 break; 1266 } 1267 } 1268 1269 // CUDA device path compilaton 1270 if (LangOpts.CUDAIsDevice && !LangOpts.HIP) { 1271 // The CUDA_ARCH value is set for the GPU target specified in the NVPTX 1272 // backend's target defines. 1273 Builder.defineMacro("__CUDA_ARCH__"); 1274 } 1275 1276 // We need to communicate this to our CUDA header wrapper, which in turn 1277 // informs the proper CUDA headers of this choice. 1278 if (LangOpts.CUDADeviceApproxTranscendentals || LangOpts.FastMath) { 1279 Builder.defineMacro("__CLANG_CUDA_APPROX_TRANSCENDENTALS__"); 1280 } 1281 1282 // Define a macro indicating that the source file is being compiled with a 1283 // SYCL device compiler which doesn't produce host binary. 1284 if (LangOpts.SYCLIsDevice) { 1285 Builder.defineMacro("__SYCL_DEVICE_ONLY__", "1"); 1286 } 1287 1288 // OpenCL definitions. 1289 if (LangOpts.OpenCL) { 1290 InitializeOpenCLFeatureTestMacros(TI, LangOpts, Builder); 1291 1292 if (TI.getTriple().isSPIR() || TI.getTriple().isSPIRV()) 1293 Builder.defineMacro("__IMAGE_SUPPORT__"); 1294 } 1295 1296 if (TI.hasInt128Type() && LangOpts.CPlusPlus && LangOpts.GNUMode) { 1297 // For each extended integer type, g++ defines a macro mapping the 1298 // index of the type (0 in this case) in some list of extended types 1299 // to the type. 1300 Builder.defineMacro("__GLIBCXX_TYPE_INT_N_0", "__int128"); 1301 Builder.defineMacro("__GLIBCXX_BITSIZE_INT_N_0", "128"); 1302 } 1303 1304 // Get other target #defines. 1305 TI.getTargetDefines(LangOpts, Builder); 1306 } 1307 1308 /// InitializePreprocessor - Initialize the preprocessor getting it and the 1309 /// environment ready to process a single file. 1310 void clang::InitializePreprocessor( 1311 Preprocessor &PP, const PreprocessorOptions &InitOpts, 1312 const PCHContainerReader &PCHContainerRdr, 1313 const FrontendOptions &FEOpts) { 1314 const LangOptions &LangOpts = PP.getLangOpts(); 1315 std::string PredefineBuffer; 1316 PredefineBuffer.reserve(4080); 1317 llvm::raw_string_ostream Predefines(PredefineBuffer); 1318 MacroBuilder Builder(Predefines); 1319 1320 // Emit line markers for various builtin sections of the file. We don't do 1321 // this in asm preprocessor mode, because "# 4" is not a line marker directive 1322 // in this mode. 1323 if (!PP.getLangOpts().AsmPreprocessor) 1324 Builder.append("# 1 \"<built-in>\" 3"); 1325 1326 // Install things like __POWERPC__, __GNUC__, etc into the macro table. 1327 if (InitOpts.UsePredefines) { 1328 // FIXME: This will create multiple definitions for most of the predefined 1329 // macros. This is not the right way to handle this. 1330 if ((LangOpts.CUDA || LangOpts.OpenMPIsDevice || LangOpts.SYCLIsDevice) && 1331 PP.getAuxTargetInfo()) 1332 InitializePredefinedMacros(*PP.getAuxTargetInfo(), LangOpts, FEOpts, 1333 PP.getPreprocessorOpts(), Builder); 1334 1335 InitializePredefinedMacros(PP.getTargetInfo(), LangOpts, FEOpts, 1336 PP.getPreprocessorOpts(), Builder); 1337 1338 // Install definitions to make Objective-C++ ARC work well with various 1339 // C++ Standard Library implementations. 1340 if (LangOpts.ObjC && LangOpts.CPlusPlus && 1341 (LangOpts.ObjCAutoRefCount || LangOpts.ObjCWeak)) { 1342 switch (InitOpts.ObjCXXARCStandardLibrary) { 1343 case ARCXX_nolib: 1344 case ARCXX_libcxx: 1345 break; 1346 1347 case ARCXX_libstdcxx: 1348 AddObjCXXARCLibstdcxxDefines(LangOpts, Builder); 1349 break; 1350 } 1351 } 1352 } 1353 1354 // Even with predefines off, some macros are still predefined. 1355 // These should all be defined in the preprocessor according to the 1356 // current language configuration. 1357 InitializeStandardPredefinedMacros(PP.getTargetInfo(), PP.getLangOpts(), 1358 FEOpts, Builder); 1359 1360 // Add on the predefines from the driver. Wrap in a #line directive to report 1361 // that they come from the command line. 1362 if (!PP.getLangOpts().AsmPreprocessor) 1363 Builder.append("# 1 \"<command line>\" 1"); 1364 1365 // Process #define's and #undef's in the order they are given. 1366 for (unsigned i = 0, e = InitOpts.Macros.size(); i != e; ++i) { 1367 if (InitOpts.Macros[i].second) // isUndef 1368 Builder.undefineMacro(InitOpts.Macros[i].first); 1369 else 1370 DefineBuiltinMacro(Builder, InitOpts.Macros[i].first, 1371 PP.getDiagnostics()); 1372 } 1373 1374 // Exit the command line and go back to <built-in> (2 is LC_LEAVE). 1375 if (!PP.getLangOpts().AsmPreprocessor) 1376 Builder.append("# 1 \"<built-in>\" 2"); 1377 1378 // If -imacros are specified, include them now. These are processed before 1379 // any -include directives. 1380 for (unsigned i = 0, e = InitOpts.MacroIncludes.size(); i != e; ++i) 1381 AddImplicitIncludeMacros(Builder, InitOpts.MacroIncludes[i]); 1382 1383 // Process -include-pch/-include-pth directives. 1384 if (!InitOpts.ImplicitPCHInclude.empty()) 1385 AddImplicitIncludePCH(Builder, PP, PCHContainerRdr, 1386 InitOpts.ImplicitPCHInclude); 1387 1388 // Process -include directives. 1389 for (unsigned i = 0, e = InitOpts.Includes.size(); i != e; ++i) { 1390 const std::string &Path = InitOpts.Includes[i]; 1391 AddImplicitInclude(Builder, Path); 1392 } 1393 1394 // Instruct the preprocessor to skip the preamble. 1395 PP.setSkipMainFilePreamble(InitOpts.PrecompiledPreambleBytes.first, 1396 InitOpts.PrecompiledPreambleBytes.second); 1397 1398 // Copy PredefinedBuffer into the Preprocessor. 1399 PP.setPredefines(std::move(PredefineBuffer)); 1400 } 1401