1 //===--- InitPreprocessor.cpp - PP initialization code. ---------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file implements the clang::InitializePreprocessor function. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "clang/Basic/FileManager.h" 14 #include "clang/Basic/MacroBuilder.h" 15 #include "clang/Basic/SourceManager.h" 16 #include "clang/Basic/SyncScope.h" 17 #include "clang/Basic/TargetInfo.h" 18 #include "clang/Basic/Version.h" 19 #include "clang/Frontend/FrontendDiagnostic.h" 20 #include "clang/Frontend/FrontendOptions.h" 21 #include "clang/Frontend/Utils.h" 22 #include "clang/Lex/HeaderSearch.h" 23 #include "clang/Lex/Preprocessor.h" 24 #include "clang/Lex/PreprocessorOptions.h" 25 #include "clang/Serialization/ASTReader.h" 26 #include "llvm/ADT/APFloat.h" 27 #include "llvm/IR/DataLayout.h" 28 #include "llvm/IR/DerivedTypes.h" 29 using namespace clang; 30 31 static bool MacroBodyEndsInBackslash(StringRef MacroBody) { 32 while (!MacroBody.empty() && isWhitespace(MacroBody.back())) 33 MacroBody = MacroBody.drop_back(); 34 return !MacroBody.empty() && MacroBody.back() == '\\'; 35 } 36 37 // Append a #define line to Buf for Macro. Macro should be of the form XXX, 38 // in which case we emit "#define XXX 1" or "XXX=Y z W" in which case we emit 39 // "#define XXX Y z W". To get a #define with no value, use "XXX=". 40 static void DefineBuiltinMacro(MacroBuilder &Builder, StringRef Macro, 41 DiagnosticsEngine &Diags) { 42 std::pair<StringRef, StringRef> MacroPair = Macro.split('='); 43 StringRef MacroName = MacroPair.first; 44 StringRef MacroBody = MacroPair.second; 45 if (MacroName.size() != Macro.size()) { 46 // Per GCC -D semantics, the macro ends at \n if it exists. 47 StringRef::size_type End = MacroBody.find_first_of("\n\r"); 48 if (End != StringRef::npos) 49 Diags.Report(diag::warn_fe_macro_contains_embedded_newline) 50 << MacroName; 51 MacroBody = MacroBody.substr(0, End); 52 // We handle macro bodies which end in a backslash by appending an extra 53 // backslash+newline. This makes sure we don't accidentally treat the 54 // backslash as a line continuation marker. 55 if (MacroBodyEndsInBackslash(MacroBody)) 56 Builder.defineMacro(MacroName, Twine(MacroBody) + "\\\n"); 57 else 58 Builder.defineMacro(MacroName, MacroBody); 59 } else { 60 // Push "macroname 1". 61 Builder.defineMacro(Macro); 62 } 63 } 64 65 /// AddImplicitInclude - Add an implicit \#include of the specified file to the 66 /// predefines buffer. 67 /// As these includes are generated by -include arguments the header search 68 /// logic is going to search relatively to the current working directory. 69 static void AddImplicitInclude(MacroBuilder &Builder, StringRef File) { 70 Builder.append(Twine("#include \"") + File + "\""); 71 } 72 73 static void AddImplicitIncludeMacros(MacroBuilder &Builder, StringRef File) { 74 Builder.append(Twine("#__include_macros \"") + File + "\""); 75 // Marker token to stop the __include_macros fetch loop. 76 Builder.append("##"); // ##? 77 } 78 79 /// Add an implicit \#include using the original file used to generate 80 /// a PCH file. 81 static void AddImplicitIncludePCH(MacroBuilder &Builder, Preprocessor &PP, 82 const PCHContainerReader &PCHContainerRdr, 83 StringRef ImplicitIncludePCH) { 84 std::string OriginalFile = ASTReader::getOriginalSourceFile( 85 std::string(ImplicitIncludePCH), PP.getFileManager(), PCHContainerRdr, 86 PP.getDiagnostics()); 87 if (OriginalFile.empty()) 88 return; 89 90 AddImplicitInclude(Builder, OriginalFile); 91 } 92 93 /// PickFP - This is used to pick a value based on the FP semantics of the 94 /// specified FP model. 95 template <typename T> 96 static T PickFP(const llvm::fltSemantics *Sem, T IEEEHalfVal, T IEEESingleVal, 97 T IEEEDoubleVal, T X87DoubleExtendedVal, T PPCDoubleDoubleVal, 98 T IEEEQuadVal) { 99 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEhalf()) 100 return IEEEHalfVal; 101 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEsingle()) 102 return IEEESingleVal; 103 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEdouble()) 104 return IEEEDoubleVal; 105 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::x87DoubleExtended()) 106 return X87DoubleExtendedVal; 107 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::PPCDoubleDouble()) 108 return PPCDoubleDoubleVal; 109 assert(Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEquad()); 110 return IEEEQuadVal; 111 } 112 113 static void DefineFloatMacros(MacroBuilder &Builder, StringRef Prefix, 114 const llvm::fltSemantics *Sem, StringRef Ext) { 115 const char *DenormMin, *Epsilon, *Max, *Min; 116 DenormMin = PickFP(Sem, "5.9604644775390625e-8", "1.40129846e-45", 117 "4.9406564584124654e-324", "3.64519953188247460253e-4951", 118 "4.94065645841246544176568792868221e-324", 119 "6.47517511943802511092443895822764655e-4966"); 120 int Digits = PickFP(Sem, 3, 6, 15, 18, 31, 33); 121 int DecimalDigits = PickFP(Sem, 5, 9, 17, 21, 33, 36); 122 Epsilon = PickFP(Sem, "9.765625e-4", "1.19209290e-7", 123 "2.2204460492503131e-16", "1.08420217248550443401e-19", 124 "4.94065645841246544176568792868221e-324", 125 "1.92592994438723585305597794258492732e-34"); 126 int MantissaDigits = PickFP(Sem, 11, 24, 53, 64, 106, 113); 127 int Min10Exp = PickFP(Sem, -4, -37, -307, -4931, -291, -4931); 128 int Max10Exp = PickFP(Sem, 4, 38, 308, 4932, 308, 4932); 129 int MinExp = PickFP(Sem, -13, -125, -1021, -16381, -968, -16381); 130 int MaxExp = PickFP(Sem, 16, 128, 1024, 16384, 1024, 16384); 131 Min = PickFP(Sem, "6.103515625e-5", "1.17549435e-38", "2.2250738585072014e-308", 132 "3.36210314311209350626e-4932", 133 "2.00416836000897277799610805135016e-292", 134 "3.36210314311209350626267781732175260e-4932"); 135 Max = PickFP(Sem, "6.5504e+4", "3.40282347e+38", "1.7976931348623157e+308", 136 "1.18973149535723176502e+4932", 137 "1.79769313486231580793728971405301e+308", 138 "1.18973149535723176508575932662800702e+4932"); 139 140 SmallString<32> DefPrefix; 141 DefPrefix = "__"; 142 DefPrefix += Prefix; 143 DefPrefix += "_"; 144 145 Builder.defineMacro(DefPrefix + "DENORM_MIN__", Twine(DenormMin)+Ext); 146 Builder.defineMacro(DefPrefix + "HAS_DENORM__"); 147 Builder.defineMacro(DefPrefix + "DIG__", Twine(Digits)); 148 Builder.defineMacro(DefPrefix + "DECIMAL_DIG__", Twine(DecimalDigits)); 149 Builder.defineMacro(DefPrefix + "EPSILON__", Twine(Epsilon)+Ext); 150 Builder.defineMacro(DefPrefix + "HAS_INFINITY__"); 151 Builder.defineMacro(DefPrefix + "HAS_QUIET_NAN__"); 152 Builder.defineMacro(DefPrefix + "MANT_DIG__", Twine(MantissaDigits)); 153 154 Builder.defineMacro(DefPrefix + "MAX_10_EXP__", Twine(Max10Exp)); 155 Builder.defineMacro(DefPrefix + "MAX_EXP__", Twine(MaxExp)); 156 Builder.defineMacro(DefPrefix + "MAX__", Twine(Max)+Ext); 157 158 Builder.defineMacro(DefPrefix + "MIN_10_EXP__","("+Twine(Min10Exp)+")"); 159 Builder.defineMacro(DefPrefix + "MIN_EXP__", "("+Twine(MinExp)+")"); 160 Builder.defineMacro(DefPrefix + "MIN__", Twine(Min)+Ext); 161 } 162 163 164 /// DefineTypeSize - Emit a macro to the predefines buffer that declares a macro 165 /// named MacroName with the max value for a type with width 'TypeWidth' a 166 /// signedness of 'isSigned' and with a value suffix of 'ValSuffix' (e.g. LL). 167 static void DefineTypeSize(const Twine &MacroName, unsigned TypeWidth, 168 StringRef ValSuffix, bool isSigned, 169 MacroBuilder &Builder) { 170 llvm::APInt MaxVal = isSigned ? llvm::APInt::getSignedMaxValue(TypeWidth) 171 : llvm::APInt::getMaxValue(TypeWidth); 172 Builder.defineMacro(MacroName, toString(MaxVal, 10, isSigned) + ValSuffix); 173 } 174 175 /// DefineTypeSize - An overloaded helper that uses TargetInfo to determine 176 /// the width, suffix, and signedness of the given type 177 static void DefineTypeSize(const Twine &MacroName, TargetInfo::IntType Ty, 178 const TargetInfo &TI, MacroBuilder &Builder) { 179 DefineTypeSize(MacroName, TI.getTypeWidth(Ty), TI.getTypeConstantSuffix(Ty), 180 TI.isTypeSigned(Ty), Builder); 181 } 182 183 static void DefineFmt(const Twine &Prefix, TargetInfo::IntType Ty, 184 const TargetInfo &TI, MacroBuilder &Builder) { 185 bool IsSigned = TI.isTypeSigned(Ty); 186 StringRef FmtModifier = TI.getTypeFormatModifier(Ty); 187 for (const char *Fmt = IsSigned ? "di" : "ouxX"; *Fmt; ++Fmt) { 188 Builder.defineMacro(Prefix + "_FMT" + Twine(*Fmt) + "__", 189 Twine("\"") + FmtModifier + Twine(*Fmt) + "\""); 190 } 191 } 192 193 static void DefineType(const Twine &MacroName, TargetInfo::IntType Ty, 194 MacroBuilder &Builder) { 195 Builder.defineMacro(MacroName, TargetInfo::getTypeName(Ty)); 196 } 197 198 static void DefineTypeWidth(const Twine &MacroName, TargetInfo::IntType Ty, 199 const TargetInfo &TI, MacroBuilder &Builder) { 200 Builder.defineMacro(MacroName, Twine(TI.getTypeWidth(Ty))); 201 } 202 203 static void DefineTypeSizeof(StringRef MacroName, unsigned BitWidth, 204 const TargetInfo &TI, MacroBuilder &Builder) { 205 Builder.defineMacro(MacroName, 206 Twine(BitWidth / TI.getCharWidth())); 207 } 208 209 // This will generate a macro based on the prefix with `_MAX__` as the suffix 210 // for the max value representable for the type, and a macro with a `_WIDTH__` 211 // suffix for the width of the type. 212 static void DefineTypeSizeAndWidth(const Twine &Prefix, TargetInfo::IntType Ty, 213 const TargetInfo &TI, 214 MacroBuilder &Builder) { 215 DefineTypeSize(Prefix + "_MAX__", Ty, TI, Builder); 216 DefineTypeWidth(Prefix + "_WIDTH__", Ty, TI, Builder); 217 } 218 219 static void DefineExactWidthIntType(TargetInfo::IntType Ty, 220 const TargetInfo &TI, 221 MacroBuilder &Builder) { 222 int TypeWidth = TI.getTypeWidth(Ty); 223 bool IsSigned = TI.isTypeSigned(Ty); 224 225 // Use the target specified int64 type, when appropriate, so that [u]int64_t 226 // ends up being defined in terms of the correct type. 227 if (TypeWidth == 64) 228 Ty = IsSigned ? TI.getInt64Type() : TI.getUInt64Type(); 229 230 // Use the target specified int16 type when appropriate. Some MCU targets 231 // (such as AVR) have definition of [u]int16_t to [un]signed int. 232 if (TypeWidth == 16) 233 Ty = IsSigned ? TI.getInt16Type() : TI.getUInt16Type(); 234 235 const char *Prefix = IsSigned ? "__INT" : "__UINT"; 236 237 DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder); 238 DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder); 239 240 StringRef ConstSuffix(TI.getTypeConstantSuffix(Ty)); 241 Builder.defineMacro(Prefix + Twine(TypeWidth) + "_C_SUFFIX__", ConstSuffix); 242 } 243 244 static void DefineExactWidthIntTypeSize(TargetInfo::IntType Ty, 245 const TargetInfo &TI, 246 MacroBuilder &Builder) { 247 int TypeWidth = TI.getTypeWidth(Ty); 248 bool IsSigned = TI.isTypeSigned(Ty); 249 250 // Use the target specified int64 type, when appropriate, so that [u]int64_t 251 // ends up being defined in terms of the correct type. 252 if (TypeWidth == 64) 253 Ty = IsSigned ? TI.getInt64Type() : TI.getUInt64Type(); 254 255 // We don't need to define a _WIDTH macro for the exact-width types because 256 // we already know the width. 257 const char *Prefix = IsSigned ? "__INT" : "__UINT"; 258 DefineTypeSize(Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder); 259 } 260 261 static void DefineLeastWidthIntType(unsigned TypeWidth, bool IsSigned, 262 const TargetInfo &TI, 263 MacroBuilder &Builder) { 264 TargetInfo::IntType Ty = TI.getLeastIntTypeByWidth(TypeWidth, IsSigned); 265 if (Ty == TargetInfo::NoInt) 266 return; 267 268 const char *Prefix = IsSigned ? "__INT_LEAST" : "__UINT_LEAST"; 269 DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder); 270 // We only want the *_WIDTH macro for the signed types to avoid too many 271 // predefined macros (the unsigned width and the signed width are identical.) 272 if (IsSigned) 273 DefineTypeSizeAndWidth(Prefix + Twine(TypeWidth), Ty, TI, Builder); 274 else 275 DefineTypeSize(Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder); 276 DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder); 277 } 278 279 static void DefineFastIntType(unsigned TypeWidth, bool IsSigned, 280 const TargetInfo &TI, MacroBuilder &Builder) { 281 // stdint.h currently defines the fast int types as equivalent to the least 282 // types. 283 TargetInfo::IntType Ty = TI.getLeastIntTypeByWidth(TypeWidth, IsSigned); 284 if (Ty == TargetInfo::NoInt) 285 return; 286 287 const char *Prefix = IsSigned ? "__INT_FAST" : "__UINT_FAST"; 288 DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder); 289 // We only want the *_WIDTH macro for the signed types to avoid too many 290 // predefined macros (the unsigned width and the signed width are identical.) 291 if (IsSigned) 292 DefineTypeSizeAndWidth(Prefix + Twine(TypeWidth), Ty, TI, Builder); 293 else 294 DefineTypeSize(Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder); 295 DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder); 296 } 297 298 299 /// Get the value the ATOMIC_*_LOCK_FREE macro should have for a type with 300 /// the specified properties. 301 static const char *getLockFreeValue(unsigned TypeWidth, unsigned TypeAlign, 302 unsigned InlineWidth) { 303 // Fully-aligned, power-of-2 sizes no larger than the inline 304 // width will be inlined as lock-free operations. 305 if (TypeWidth == TypeAlign && (TypeWidth & (TypeWidth - 1)) == 0 && 306 TypeWidth <= InlineWidth) 307 return "2"; // "always lock free" 308 // We cannot be certain what operations the lib calls might be 309 // able to implement as lock-free on future processors. 310 return "1"; // "sometimes lock free" 311 } 312 313 /// Add definitions required for a smooth interaction between 314 /// Objective-C++ automated reference counting and libstdc++ (4.2). 315 static void AddObjCXXARCLibstdcxxDefines(const LangOptions &LangOpts, 316 MacroBuilder &Builder) { 317 Builder.defineMacro("_GLIBCXX_PREDEFINED_OBJC_ARC_IS_SCALAR"); 318 319 std::string Result; 320 { 321 // Provide specializations for the __is_scalar type trait so that 322 // lifetime-qualified objects are not considered "scalar" types, which 323 // libstdc++ uses as an indicator of the presence of trivial copy, assign, 324 // default-construct, and destruct semantics (none of which hold for 325 // lifetime-qualified objects in ARC). 326 llvm::raw_string_ostream Out(Result); 327 328 Out << "namespace std {\n" 329 << "\n" 330 << "struct __true_type;\n" 331 << "struct __false_type;\n" 332 << "\n"; 333 334 Out << "template<typename _Tp> struct __is_scalar;\n" 335 << "\n"; 336 337 if (LangOpts.ObjCAutoRefCount) { 338 Out << "template<typename _Tp>\n" 339 << "struct __is_scalar<__attribute__((objc_ownership(strong))) _Tp> {\n" 340 << " enum { __value = 0 };\n" 341 << " typedef __false_type __type;\n" 342 << "};\n" 343 << "\n"; 344 } 345 346 if (LangOpts.ObjCWeak) { 347 Out << "template<typename _Tp>\n" 348 << "struct __is_scalar<__attribute__((objc_ownership(weak))) _Tp> {\n" 349 << " enum { __value = 0 };\n" 350 << " typedef __false_type __type;\n" 351 << "};\n" 352 << "\n"; 353 } 354 355 if (LangOpts.ObjCAutoRefCount) { 356 Out << "template<typename _Tp>\n" 357 << "struct __is_scalar<__attribute__((objc_ownership(autoreleasing)))" 358 << " _Tp> {\n" 359 << " enum { __value = 0 };\n" 360 << " typedef __false_type __type;\n" 361 << "};\n" 362 << "\n"; 363 } 364 365 Out << "}\n"; 366 } 367 Builder.append(Result); 368 } 369 370 static void InitializeStandardPredefinedMacros(const TargetInfo &TI, 371 const LangOptions &LangOpts, 372 const FrontendOptions &FEOpts, 373 MacroBuilder &Builder) { 374 if (LangOpts.HLSL) { 375 Builder.defineMacro("__hlsl_clang"); 376 // HLSL Version 377 Builder.defineMacro("__HLSL_VERSION", 378 Twine((unsigned)LangOpts.getHLSLVersion())); 379 380 // Shader target information 381 // "enums" for shader stages 382 Builder.defineMacro("__SHADER_STAGE_VERTEX", 383 Twine((uint32_t)ShaderStage::Vertex)); 384 Builder.defineMacro("__SHADER_STAGE_PIXEL", 385 Twine((uint32_t)ShaderStage::Pixel)); 386 Builder.defineMacro("__SHADER_STAGE_GEOMETRY", 387 Twine((uint32_t)ShaderStage::Geometry)); 388 Builder.defineMacro("__SHADER_STAGE_HULL", 389 Twine((uint32_t)ShaderStage::Hull)); 390 Builder.defineMacro("__SHADER_STAGE_DOMAIN", 391 Twine((uint32_t)ShaderStage::Domain)); 392 Builder.defineMacro("__SHADER_STAGE_COMPUTE", 393 Twine((uint32_t)ShaderStage::Compute)); 394 Builder.defineMacro("__SHADER_STAGE_AMPLIFICATION", 395 Twine((uint32_t)ShaderStage::Amplification)); 396 Builder.defineMacro("__SHADER_STAGE_MESH", 397 Twine((uint32_t)ShaderStage::Mesh)); 398 Builder.defineMacro("__SHADER_STAGE_LIBRARY", 399 Twine((uint32_t)ShaderStage::Library)); 400 // The current shader stage itself 401 uint32_t StageInteger = StageInteger = 402 (uint32_t)TI.getTriple().getEnvironment() - 403 (uint32_t)llvm::Triple::Pixel; 404 // TODO: When we add raytracing support we can clean this up 405 if (TI.getTriple().getEnvironment() == llvm::Triple::Mesh) 406 StageInteger = (uint32_t)ShaderStage::Mesh; 407 else if (TI.getTriple().getEnvironment() == llvm::Triple::Amplification) 408 StageInteger = (uint32_t)ShaderStage::Amplification; 409 410 Builder.defineMacro("__SHADER_TARGET_STAGE", Twine(StageInteger)); 411 // Add target versions 412 if (TI.getTriple().getOS() == llvm::Triple::ShaderModel) { 413 VersionTuple Version = TI.getTriple().getOSVersion(); 414 Builder.defineMacro("__SHADER_TARGET_MAJOR", Twine(Version.getMajor())); 415 unsigned Minor = Version.getMinor() ? *Version.getMinor() : 0; 416 Builder.defineMacro("__SHADER_TARGET_MINOR", Twine(Minor)); 417 } 418 return; 419 } 420 // C++ [cpp.predefined]p1: 421 // The following macro names shall be defined by the implementation: 422 423 // -- __STDC__ 424 // [C++] Whether __STDC__ is predefined and if so, what its value is, 425 // are implementation-defined. 426 // (Removed in C++20.) 427 if (!LangOpts.MSVCCompat && !LangOpts.TraditionalCPP) 428 Builder.defineMacro("__STDC__"); 429 // -- __STDC_HOSTED__ 430 // The integer literal 1 if the implementation is a hosted 431 // implementation or the integer literal 0 if it is not. 432 if (LangOpts.Freestanding) 433 Builder.defineMacro("__STDC_HOSTED__", "0"); 434 else 435 Builder.defineMacro("__STDC_HOSTED__"); 436 437 // -- __STDC_VERSION__ 438 // [C++] Whether __STDC_VERSION__ is predefined and if so, what its 439 // value is, are implementation-defined. 440 // (Removed in C++20.) 441 if (!LangOpts.CPlusPlus) { 442 // FIXME: Use correct value for C23. 443 if (LangOpts.C2x) 444 Builder.defineMacro("__STDC_VERSION__", "202000L"); 445 else if (LangOpts.C17) 446 Builder.defineMacro("__STDC_VERSION__", "201710L"); 447 else if (LangOpts.C11) 448 Builder.defineMacro("__STDC_VERSION__", "201112L"); 449 else if (LangOpts.C99) 450 Builder.defineMacro("__STDC_VERSION__", "199901L"); 451 else if (!LangOpts.GNUMode && LangOpts.Digraphs) 452 Builder.defineMacro("__STDC_VERSION__", "199409L"); 453 } else { 454 // -- __cplusplus 455 // FIXME: Use correct value for C++23. 456 if (LangOpts.CPlusPlus2b) 457 Builder.defineMacro("__cplusplus", "202101L"); 458 // [C++20] The integer literal 202002L. 459 else if (LangOpts.CPlusPlus20) 460 Builder.defineMacro("__cplusplus", "202002L"); 461 // [C++17] The integer literal 201703L. 462 else if (LangOpts.CPlusPlus17) 463 Builder.defineMacro("__cplusplus", "201703L"); 464 // [C++14] The name __cplusplus is defined to the value 201402L when 465 // compiling a C++ translation unit. 466 else if (LangOpts.CPlusPlus14) 467 Builder.defineMacro("__cplusplus", "201402L"); 468 // [C++11] The name __cplusplus is defined to the value 201103L when 469 // compiling a C++ translation unit. 470 else if (LangOpts.CPlusPlus11) 471 Builder.defineMacro("__cplusplus", "201103L"); 472 // [C++03] The name __cplusplus is defined to the value 199711L when 473 // compiling a C++ translation unit. 474 else 475 Builder.defineMacro("__cplusplus", "199711L"); 476 477 // -- __STDCPP_DEFAULT_NEW_ALIGNMENT__ 478 // [C++17] An integer literal of type std::size_t whose value is the 479 // alignment guaranteed by a call to operator new(std::size_t) 480 // 481 // We provide this in all language modes, since it seems generally useful. 482 Builder.defineMacro("__STDCPP_DEFAULT_NEW_ALIGNMENT__", 483 Twine(TI.getNewAlign() / TI.getCharWidth()) + 484 TI.getTypeConstantSuffix(TI.getSizeType())); 485 486 // -- __STDCPP_THREADS__ 487 // Defined, and has the value integer literal 1, if and only if a 488 // program can have more than one thread of execution. 489 if (LangOpts.getThreadModel() == LangOptions::ThreadModelKind::POSIX) 490 Builder.defineMacro("__STDCPP_THREADS__", "1"); 491 } 492 493 // In C11 these are environment macros. In C++11 they are only defined 494 // as part of <cuchar>. To prevent breakage when mixing C and C++ 495 // code, define these macros unconditionally. We can define them 496 // unconditionally, as Clang always uses UTF-16 and UTF-32 for 16-bit 497 // and 32-bit character literals. 498 Builder.defineMacro("__STDC_UTF_16__", "1"); 499 Builder.defineMacro("__STDC_UTF_32__", "1"); 500 501 if (LangOpts.ObjC) 502 Builder.defineMacro("__OBJC__"); 503 504 // OpenCL v1.0/1.1 s6.9, v1.2/2.0 s6.10: Preprocessor Directives and Macros. 505 if (LangOpts.OpenCL) { 506 if (LangOpts.CPlusPlus) { 507 switch (LangOpts.OpenCLCPlusPlusVersion) { 508 case 100: 509 Builder.defineMacro("__OPENCL_CPP_VERSION__", "100"); 510 break; 511 case 202100: 512 Builder.defineMacro("__OPENCL_CPP_VERSION__", "202100"); 513 break; 514 default: 515 llvm_unreachable("Unsupported C++ version for OpenCL"); 516 } 517 Builder.defineMacro("__CL_CPP_VERSION_1_0__", "100"); 518 Builder.defineMacro("__CL_CPP_VERSION_2021__", "202100"); 519 } else { 520 // OpenCL v1.0 and v1.1 do not have a predefined macro to indicate the 521 // language standard with which the program is compiled. __OPENCL_VERSION__ 522 // is for the OpenCL version supported by the OpenCL device, which is not 523 // necessarily the language standard with which the program is compiled. 524 // A shared OpenCL header file requires a macro to indicate the language 525 // standard. As a workaround, __OPENCL_C_VERSION__ is defined for 526 // OpenCL v1.0 and v1.1. 527 switch (LangOpts.OpenCLVersion) { 528 case 100: 529 Builder.defineMacro("__OPENCL_C_VERSION__", "100"); 530 break; 531 case 110: 532 Builder.defineMacro("__OPENCL_C_VERSION__", "110"); 533 break; 534 case 120: 535 Builder.defineMacro("__OPENCL_C_VERSION__", "120"); 536 break; 537 case 200: 538 Builder.defineMacro("__OPENCL_C_VERSION__", "200"); 539 break; 540 case 300: 541 Builder.defineMacro("__OPENCL_C_VERSION__", "300"); 542 break; 543 default: 544 llvm_unreachable("Unsupported OpenCL version"); 545 } 546 } 547 Builder.defineMacro("CL_VERSION_1_0", "100"); 548 Builder.defineMacro("CL_VERSION_1_1", "110"); 549 Builder.defineMacro("CL_VERSION_1_2", "120"); 550 Builder.defineMacro("CL_VERSION_2_0", "200"); 551 Builder.defineMacro("CL_VERSION_3_0", "300"); 552 553 if (TI.isLittleEndian()) 554 Builder.defineMacro("__ENDIAN_LITTLE__"); 555 556 if (LangOpts.FastRelaxedMath) 557 Builder.defineMacro("__FAST_RELAXED_MATH__"); 558 } 559 560 if (LangOpts.SYCLIsDevice || LangOpts.SYCLIsHost) { 561 // SYCL Version is set to a value when building SYCL applications 562 if (LangOpts.getSYCLVersion() == LangOptions::SYCL_2017) 563 Builder.defineMacro("CL_SYCL_LANGUAGE_VERSION", "121"); 564 else if (LangOpts.getSYCLVersion() == LangOptions::SYCL_2020) 565 Builder.defineMacro("SYCL_LANGUAGE_VERSION", "202001"); 566 } 567 568 // Not "standard" per se, but available even with the -undef flag. 569 if (LangOpts.AsmPreprocessor) 570 Builder.defineMacro("__ASSEMBLER__"); 571 if (LangOpts.CUDA) { 572 if (LangOpts.GPURelocatableDeviceCode) 573 Builder.defineMacro("__CLANG_RDC__"); 574 if (!LangOpts.HIP) 575 Builder.defineMacro("__CUDA__"); 576 } 577 if (LangOpts.HIP) { 578 Builder.defineMacro("__HIP__"); 579 Builder.defineMacro("__HIPCC__"); 580 Builder.defineMacro("__HIP_MEMORY_SCOPE_SINGLETHREAD", "1"); 581 Builder.defineMacro("__HIP_MEMORY_SCOPE_WAVEFRONT", "2"); 582 Builder.defineMacro("__HIP_MEMORY_SCOPE_WORKGROUP", "3"); 583 Builder.defineMacro("__HIP_MEMORY_SCOPE_AGENT", "4"); 584 Builder.defineMacro("__HIP_MEMORY_SCOPE_SYSTEM", "5"); 585 if (LangOpts.CUDAIsDevice) 586 Builder.defineMacro("__HIP_DEVICE_COMPILE__"); 587 if (LangOpts.GPUDefaultStream == 588 LangOptions::GPUDefaultStreamKind::PerThread) 589 Builder.defineMacro("HIP_API_PER_THREAD_DEFAULT_STREAM"); 590 } 591 } 592 593 /// Initialize the predefined C++ language feature test macros defined in 594 /// ISO/IEC JTC1/SC22/WG21 (C++) SD-6: "SG10 Feature Test Recommendations". 595 static void InitializeCPlusPlusFeatureTestMacros(const LangOptions &LangOpts, 596 MacroBuilder &Builder) { 597 // C++98 features. 598 if (LangOpts.RTTI) 599 Builder.defineMacro("__cpp_rtti", "199711L"); 600 if (LangOpts.CXXExceptions) 601 Builder.defineMacro("__cpp_exceptions", "199711L"); 602 603 // C++11 features. 604 if (LangOpts.CPlusPlus11) { 605 Builder.defineMacro("__cpp_unicode_characters", "200704L"); 606 Builder.defineMacro("__cpp_raw_strings", "200710L"); 607 Builder.defineMacro("__cpp_unicode_literals", "200710L"); 608 Builder.defineMacro("__cpp_user_defined_literals", "200809L"); 609 Builder.defineMacro("__cpp_lambdas", "200907L"); 610 Builder.defineMacro("__cpp_constexpr", LangOpts.CPlusPlus2b ? "202110L" 611 : LangOpts.CPlusPlus20 ? "201907L" 612 : LangOpts.CPlusPlus17 ? "201603L" 613 : LangOpts.CPlusPlus14 ? "201304L" 614 : "200704"); 615 Builder.defineMacro("__cpp_constexpr_in_decltype", "201711L"); 616 Builder.defineMacro("__cpp_range_based_for", 617 LangOpts.CPlusPlus17 ? "201603L" : "200907"); 618 Builder.defineMacro("__cpp_static_assert", 619 LangOpts.CPlusPlus17 ? "201411L" : "200410"); 620 Builder.defineMacro("__cpp_decltype", "200707L"); 621 Builder.defineMacro("__cpp_attributes", "200809L"); 622 Builder.defineMacro("__cpp_rvalue_references", "200610L"); 623 Builder.defineMacro("__cpp_variadic_templates", "200704L"); 624 Builder.defineMacro("__cpp_initializer_lists", "200806L"); 625 Builder.defineMacro("__cpp_delegating_constructors", "200604L"); 626 Builder.defineMacro("__cpp_nsdmi", "200809L"); 627 Builder.defineMacro("__cpp_inheriting_constructors", "201511L"); 628 Builder.defineMacro("__cpp_ref_qualifiers", "200710L"); 629 Builder.defineMacro("__cpp_alias_templates", "200704L"); 630 } 631 if (LangOpts.ThreadsafeStatics) 632 Builder.defineMacro("__cpp_threadsafe_static_init", "200806L"); 633 634 // C++14 features. 635 if (LangOpts.CPlusPlus14) { 636 Builder.defineMacro("__cpp_binary_literals", "201304L"); 637 Builder.defineMacro("__cpp_digit_separators", "201309L"); 638 Builder.defineMacro("__cpp_init_captures", 639 LangOpts.CPlusPlus20 ? "201803L" : "201304L"); 640 Builder.defineMacro("__cpp_generic_lambdas", 641 LangOpts.CPlusPlus20 ? "201707L" : "201304L"); 642 Builder.defineMacro("__cpp_decltype_auto", "201304L"); 643 Builder.defineMacro("__cpp_return_type_deduction", "201304L"); 644 Builder.defineMacro("__cpp_aggregate_nsdmi", "201304L"); 645 Builder.defineMacro("__cpp_variable_templates", "201304L"); 646 } 647 if (LangOpts.SizedDeallocation) 648 Builder.defineMacro("__cpp_sized_deallocation", "201309L"); 649 650 // C++17 features. 651 if (LangOpts.CPlusPlus17) { 652 Builder.defineMacro("__cpp_hex_float", "201603L"); 653 Builder.defineMacro("__cpp_inline_variables", "201606L"); 654 Builder.defineMacro("__cpp_noexcept_function_type", "201510L"); 655 Builder.defineMacro("__cpp_capture_star_this", "201603L"); 656 Builder.defineMacro("__cpp_if_constexpr", "201606L"); 657 Builder.defineMacro("__cpp_deduction_guides", "201703L"); // (not latest) 658 Builder.defineMacro("__cpp_template_auto", "201606L"); // (old name) 659 Builder.defineMacro("__cpp_namespace_attributes", "201411L"); 660 Builder.defineMacro("__cpp_enumerator_attributes", "201411L"); 661 Builder.defineMacro("__cpp_nested_namespace_definitions", "201411L"); 662 Builder.defineMacro("__cpp_variadic_using", "201611L"); 663 Builder.defineMacro("__cpp_aggregate_bases", "201603L"); 664 Builder.defineMacro("__cpp_structured_bindings", "201606L"); 665 Builder.defineMacro("__cpp_nontype_template_args", 666 "201411L"); // (not latest) 667 Builder.defineMacro("__cpp_fold_expressions", "201603L"); 668 Builder.defineMacro("__cpp_guaranteed_copy_elision", "201606L"); 669 Builder.defineMacro("__cpp_nontype_template_parameter_auto", "201606L"); 670 } 671 if (LangOpts.AlignedAllocation && !LangOpts.AlignedAllocationUnavailable) 672 Builder.defineMacro("__cpp_aligned_new", "201606L"); 673 if (LangOpts.RelaxedTemplateTemplateArgs) 674 Builder.defineMacro("__cpp_template_template_args", "201611L"); 675 676 // C++20 features. 677 if (LangOpts.CPlusPlus20) { 678 //Builder.defineMacro("__cpp_aggregate_paren_init", "201902L"); 679 Builder.defineMacro("__cpp_concepts", "201907L"); 680 Builder.defineMacro("__cpp_conditional_explicit", "201806L"); 681 //Builder.defineMacro("__cpp_consteval", "201811L"); 682 Builder.defineMacro("__cpp_constexpr_dynamic_alloc", "201907L"); 683 Builder.defineMacro("__cpp_constinit", "201907L"); 684 Builder.defineMacro("__cpp_impl_coroutine", "201902L"); 685 Builder.defineMacro("__cpp_designated_initializers", "201707L"); 686 Builder.defineMacro("__cpp_impl_three_way_comparison", "201907L"); 687 //Builder.defineMacro("__cpp_modules", "201907L"); 688 Builder.defineMacro("__cpp_using_enum", "201907L"); 689 } 690 // C++2b features. 691 if (LangOpts.CPlusPlus2b) { 692 Builder.defineMacro("__cpp_implicit_move", "202011L"); 693 Builder.defineMacro("__cpp_size_t_suffix", "202011L"); 694 Builder.defineMacro("__cpp_if_consteval", "202106L"); 695 Builder.defineMacro("__cpp_multidimensional_subscript", "202110L"); 696 } 697 if (LangOpts.Char8) 698 Builder.defineMacro("__cpp_char8_t", "201811L"); 699 Builder.defineMacro("__cpp_impl_destroying_delete", "201806L"); 700 701 // TS features. 702 if (LangOpts.Coroutines) 703 Builder.defineMacro("__cpp_coroutines", "201703L"); 704 } 705 706 /// InitializeOpenCLFeatureTestMacros - Define OpenCL macros based on target 707 /// settings and language version 708 void InitializeOpenCLFeatureTestMacros(const TargetInfo &TI, 709 const LangOptions &Opts, 710 MacroBuilder &Builder) { 711 const llvm::StringMap<bool> &OpenCLFeaturesMap = TI.getSupportedOpenCLOpts(); 712 // FIXME: OpenCL options which affect language semantics/syntax 713 // should be moved into LangOptions. 714 auto defineOpenCLExtMacro = [&](llvm::StringRef Name, auto... OptArgs) { 715 // Check if extension is supported by target and is available in this 716 // OpenCL version 717 if (TI.hasFeatureEnabled(OpenCLFeaturesMap, Name) && 718 OpenCLOptions::isOpenCLOptionAvailableIn(Opts, OptArgs...)) 719 Builder.defineMacro(Name); 720 }; 721 #define OPENCL_GENERIC_EXTENSION(Ext, ...) \ 722 defineOpenCLExtMacro(#Ext, __VA_ARGS__); 723 #include "clang/Basic/OpenCLExtensions.def" 724 725 // Assume compiling for FULL profile 726 Builder.defineMacro("__opencl_c_int64"); 727 } 728 729 static void InitializePredefinedMacros(const TargetInfo &TI, 730 const LangOptions &LangOpts, 731 const FrontendOptions &FEOpts, 732 const PreprocessorOptions &PPOpts, 733 MacroBuilder &Builder) { 734 // Compiler version introspection macros. 735 Builder.defineMacro("__llvm__"); // LLVM Backend 736 Builder.defineMacro("__clang__"); // Clang Frontend 737 #define TOSTR2(X) #X 738 #define TOSTR(X) TOSTR2(X) 739 Builder.defineMacro("__clang_major__", TOSTR(CLANG_VERSION_MAJOR)); 740 Builder.defineMacro("__clang_minor__", TOSTR(CLANG_VERSION_MINOR)); 741 Builder.defineMacro("__clang_patchlevel__", TOSTR(CLANG_VERSION_PATCHLEVEL)); 742 #undef TOSTR 743 #undef TOSTR2 744 Builder.defineMacro("__clang_version__", 745 "\"" CLANG_VERSION_STRING " " 746 + getClangFullRepositoryVersion() + "\""); 747 748 if (LangOpts.GNUCVersion != 0) { 749 // Major, minor, patch, are given two decimal places each, so 4.2.1 becomes 750 // 40201. 751 unsigned GNUCMajor = LangOpts.GNUCVersion / 100 / 100; 752 unsigned GNUCMinor = LangOpts.GNUCVersion / 100 % 100; 753 unsigned GNUCPatch = LangOpts.GNUCVersion % 100; 754 Builder.defineMacro("__GNUC__", Twine(GNUCMajor)); 755 Builder.defineMacro("__GNUC_MINOR__", Twine(GNUCMinor)); 756 Builder.defineMacro("__GNUC_PATCHLEVEL__", Twine(GNUCPatch)); 757 Builder.defineMacro("__GXX_ABI_VERSION", "1002"); 758 759 if (LangOpts.CPlusPlus) { 760 Builder.defineMacro("__GNUG__", Twine(GNUCMajor)); 761 Builder.defineMacro("__GXX_WEAK__"); 762 } 763 } 764 765 // Define macros for the C11 / C++11 memory orderings 766 Builder.defineMacro("__ATOMIC_RELAXED", "0"); 767 Builder.defineMacro("__ATOMIC_CONSUME", "1"); 768 Builder.defineMacro("__ATOMIC_ACQUIRE", "2"); 769 Builder.defineMacro("__ATOMIC_RELEASE", "3"); 770 Builder.defineMacro("__ATOMIC_ACQ_REL", "4"); 771 Builder.defineMacro("__ATOMIC_SEQ_CST", "5"); 772 773 // Define macros for the OpenCL memory scope. 774 // The values should match AtomicScopeOpenCLModel::ID enum. 775 static_assert( 776 static_cast<unsigned>(AtomicScopeOpenCLModel::WorkGroup) == 1 && 777 static_cast<unsigned>(AtomicScopeOpenCLModel::Device) == 2 && 778 static_cast<unsigned>(AtomicScopeOpenCLModel::AllSVMDevices) == 3 && 779 static_cast<unsigned>(AtomicScopeOpenCLModel::SubGroup) == 4, 780 "Invalid OpenCL memory scope enum definition"); 781 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_WORK_ITEM", "0"); 782 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_WORK_GROUP", "1"); 783 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_DEVICE", "2"); 784 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_ALL_SVM_DEVICES", "3"); 785 Builder.defineMacro("__OPENCL_MEMORY_SCOPE_SUB_GROUP", "4"); 786 787 // Support for #pragma redefine_extname (Sun compatibility) 788 Builder.defineMacro("__PRAGMA_REDEFINE_EXTNAME", "1"); 789 790 // Previously this macro was set to a string aiming to achieve compatibility 791 // with GCC 4.2.1. Now, just return the full Clang version 792 Builder.defineMacro("__VERSION__", "\"" + 793 Twine(getClangFullCPPVersion()) + "\""); 794 795 // Initialize language-specific preprocessor defines. 796 797 // Standard conforming mode? 798 if (!LangOpts.GNUMode && !LangOpts.MSVCCompat) 799 Builder.defineMacro("__STRICT_ANSI__"); 800 801 if (LangOpts.GNUCVersion && LangOpts.CPlusPlus11) 802 Builder.defineMacro("__GXX_EXPERIMENTAL_CXX0X__"); 803 804 if (LangOpts.ObjC) { 805 if (LangOpts.ObjCRuntime.isNonFragile()) { 806 Builder.defineMacro("__OBJC2__"); 807 808 if (LangOpts.ObjCExceptions) 809 Builder.defineMacro("OBJC_ZEROCOST_EXCEPTIONS"); 810 } 811 812 if (LangOpts.getGC() != LangOptions::NonGC) 813 Builder.defineMacro("__OBJC_GC__"); 814 815 if (LangOpts.ObjCRuntime.isNeXTFamily()) 816 Builder.defineMacro("__NEXT_RUNTIME__"); 817 818 if (LangOpts.ObjCRuntime.getKind() == ObjCRuntime::GNUstep) { 819 auto version = LangOpts.ObjCRuntime.getVersion(); 820 std::string versionString = "1"; 821 // Don't rely on the tuple argument, because we can be asked to target 822 // later ABIs than we actually support, so clamp these values to those 823 // currently supported 824 if (version >= VersionTuple(2, 0)) 825 Builder.defineMacro("__OBJC_GNUSTEP_RUNTIME_ABI__", "20"); 826 else 827 Builder.defineMacro("__OBJC_GNUSTEP_RUNTIME_ABI__", 828 "1" + Twine(std::min(8U, version.getMinor().getValueOr(0)))); 829 } 830 831 if (LangOpts.ObjCRuntime.getKind() == ObjCRuntime::ObjFW) { 832 VersionTuple tuple = LangOpts.ObjCRuntime.getVersion(); 833 834 unsigned minor = 0; 835 if (tuple.getMinor().hasValue()) 836 minor = tuple.getMinor().getValue(); 837 838 unsigned subminor = 0; 839 if (tuple.getSubminor().hasValue()) 840 subminor = tuple.getSubminor().getValue(); 841 842 Builder.defineMacro("__OBJFW_RUNTIME_ABI__", 843 Twine(tuple.getMajor() * 10000 + minor * 100 + 844 subminor)); 845 } 846 847 Builder.defineMacro("IBOutlet", "__attribute__((iboutlet))"); 848 Builder.defineMacro("IBOutletCollection(ClassName)", 849 "__attribute__((iboutletcollection(ClassName)))"); 850 Builder.defineMacro("IBAction", "void)__attribute__((ibaction)"); 851 Builder.defineMacro("IBInspectable", ""); 852 Builder.defineMacro("IB_DESIGNABLE", ""); 853 } 854 855 // Define a macro that describes the Objective-C boolean type even for C 856 // and C++ since BOOL can be used from non Objective-C code. 857 Builder.defineMacro("__OBJC_BOOL_IS_BOOL", 858 Twine(TI.useSignedCharForObjCBool() ? "0" : "1")); 859 860 if (LangOpts.CPlusPlus) 861 InitializeCPlusPlusFeatureTestMacros(LangOpts, Builder); 862 863 // darwin_constant_cfstrings controls this. This is also dependent 864 // on other things like the runtime I believe. This is set even for C code. 865 if (!LangOpts.NoConstantCFStrings) 866 Builder.defineMacro("__CONSTANT_CFSTRINGS__"); 867 868 if (LangOpts.ObjC) 869 Builder.defineMacro("OBJC_NEW_PROPERTIES"); 870 871 if (LangOpts.PascalStrings) 872 Builder.defineMacro("__PASCAL_STRINGS__"); 873 874 if (LangOpts.Blocks) { 875 Builder.defineMacro("__block", "__attribute__((__blocks__(byref)))"); 876 Builder.defineMacro("__BLOCKS__"); 877 } 878 879 if (!LangOpts.MSVCCompat && LangOpts.Exceptions) 880 Builder.defineMacro("__EXCEPTIONS"); 881 if (LangOpts.GNUCVersion && LangOpts.RTTI) 882 Builder.defineMacro("__GXX_RTTI"); 883 884 if (LangOpts.hasSjLjExceptions()) 885 Builder.defineMacro("__USING_SJLJ_EXCEPTIONS__"); 886 else if (LangOpts.hasSEHExceptions()) 887 Builder.defineMacro("__SEH__"); 888 else if (LangOpts.hasDWARFExceptions() && 889 (TI.getTriple().isThumb() || TI.getTriple().isARM())) 890 Builder.defineMacro("__ARM_DWARF_EH__"); 891 892 if (LangOpts.Deprecated) 893 Builder.defineMacro("__DEPRECATED"); 894 895 if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus) 896 Builder.defineMacro("__private_extern__", "extern"); 897 898 if (LangOpts.MicrosoftExt) { 899 if (LangOpts.WChar) { 900 // wchar_t supported as a keyword. 901 Builder.defineMacro("_WCHAR_T_DEFINED"); 902 Builder.defineMacro("_NATIVE_WCHAR_T_DEFINED"); 903 } 904 } 905 906 // Macros to help identify the narrow and wide character sets 907 // FIXME: clang currently ignores -fexec-charset=. If this changes, 908 // then this may need to be updated. 909 Builder.defineMacro("__clang_literal_encoding__", "\"UTF-8\""); 910 if (TI.getTypeWidth(TI.getWCharType()) >= 32) { 911 // FIXME: 32-bit wchar_t signals UTF-32. This may change 912 // if -fwide-exec-charset= is ever supported. 913 Builder.defineMacro("__clang_wide_literal_encoding__", "\"UTF-32\""); 914 } else { 915 // FIXME: Less-than 32-bit wchar_t generally means UTF-16 916 // (e.g., Windows, 32-bit IBM). This may need to be 917 // updated if -fwide-exec-charset= is ever supported. 918 Builder.defineMacro("__clang_wide_literal_encoding__", "\"UTF-16\""); 919 } 920 921 if (LangOpts.Optimize) 922 Builder.defineMacro("__OPTIMIZE__"); 923 if (LangOpts.OptimizeSize) 924 Builder.defineMacro("__OPTIMIZE_SIZE__"); 925 926 if (LangOpts.FastMath) 927 Builder.defineMacro("__FAST_MATH__"); 928 929 // Initialize target-specific preprocessor defines. 930 931 // __BYTE_ORDER__ was added in GCC 4.6. It's analogous 932 // to the macro __BYTE_ORDER (no trailing underscores) 933 // from glibc's <endian.h> header. 934 // We don't support the PDP-11 as a target, but include 935 // the define so it can still be compared against. 936 Builder.defineMacro("__ORDER_LITTLE_ENDIAN__", "1234"); 937 Builder.defineMacro("__ORDER_BIG_ENDIAN__", "4321"); 938 Builder.defineMacro("__ORDER_PDP_ENDIAN__", "3412"); 939 if (TI.isBigEndian()) { 940 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_BIG_ENDIAN__"); 941 Builder.defineMacro("__BIG_ENDIAN__"); 942 } else { 943 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_LITTLE_ENDIAN__"); 944 Builder.defineMacro("__LITTLE_ENDIAN__"); 945 } 946 947 if (TI.getPointerWidth(0) == 64 && TI.getLongWidth() == 64 948 && TI.getIntWidth() == 32) { 949 Builder.defineMacro("_LP64"); 950 Builder.defineMacro("__LP64__"); 951 } 952 953 if (TI.getPointerWidth(0) == 32 && TI.getLongWidth() == 32 954 && TI.getIntWidth() == 32) { 955 Builder.defineMacro("_ILP32"); 956 Builder.defineMacro("__ILP32__"); 957 } 958 959 // Define type sizing macros based on the target properties. 960 assert(TI.getCharWidth() == 8 && "Only support 8-bit char so far"); 961 Builder.defineMacro("__CHAR_BIT__", Twine(TI.getCharWidth())); 962 963 Builder.defineMacro("__BOOL_WIDTH__", Twine(TI.getBoolWidth())); 964 Builder.defineMacro("__SHRT_WIDTH__", Twine(TI.getShortWidth())); 965 Builder.defineMacro("__INT_WIDTH__", Twine(TI.getIntWidth())); 966 Builder.defineMacro("__LONG_WIDTH__", Twine(TI.getLongWidth())); 967 Builder.defineMacro("__LLONG_WIDTH__", Twine(TI.getLongLongWidth())); 968 969 size_t BitIntMaxWidth = TI.getMaxBitIntWidth(); 970 assert(BitIntMaxWidth <= llvm::IntegerType::MAX_INT_BITS && 971 "Target defined a max bit width larger than LLVM can support!"); 972 assert(BitIntMaxWidth >= TI.getLongLongWidth() && 973 "Target defined a max bit width smaller than the C standard allows!"); 974 Builder.defineMacro("__BITINT_MAXWIDTH__", Twine(BitIntMaxWidth)); 975 976 DefineTypeSize("__SCHAR_MAX__", TargetInfo::SignedChar, TI, Builder); 977 DefineTypeSize("__SHRT_MAX__", TargetInfo::SignedShort, TI, Builder); 978 DefineTypeSize("__INT_MAX__", TargetInfo::SignedInt, TI, Builder); 979 DefineTypeSize("__LONG_MAX__", TargetInfo::SignedLong, TI, Builder); 980 DefineTypeSize("__LONG_LONG_MAX__", TargetInfo::SignedLongLong, TI, Builder); 981 DefineTypeSizeAndWidth("__WCHAR", TI.getWCharType(), TI, Builder); 982 DefineTypeSizeAndWidth("__WINT", TI.getWIntType(), TI, Builder); 983 DefineTypeSizeAndWidth("__INTMAX", TI.getIntMaxType(), TI, Builder); 984 DefineTypeSizeAndWidth("__SIZE", TI.getSizeType(), TI, Builder); 985 986 DefineTypeSizeAndWidth("__UINTMAX", TI.getUIntMaxType(), TI, Builder); 987 DefineTypeSizeAndWidth("__PTRDIFF", TI.getPtrDiffType(0), TI, Builder); 988 DefineTypeSizeAndWidth("__INTPTR", TI.getIntPtrType(), TI, Builder); 989 DefineTypeSizeAndWidth("__UINTPTR", TI.getUIntPtrType(), TI, Builder); 990 991 DefineTypeSizeof("__SIZEOF_DOUBLE__", TI.getDoubleWidth(), TI, Builder); 992 DefineTypeSizeof("__SIZEOF_FLOAT__", TI.getFloatWidth(), TI, Builder); 993 DefineTypeSizeof("__SIZEOF_INT__", TI.getIntWidth(), TI, Builder); 994 DefineTypeSizeof("__SIZEOF_LONG__", TI.getLongWidth(), TI, Builder); 995 DefineTypeSizeof("__SIZEOF_LONG_DOUBLE__",TI.getLongDoubleWidth(),TI,Builder); 996 DefineTypeSizeof("__SIZEOF_LONG_LONG__", TI.getLongLongWidth(), TI, Builder); 997 DefineTypeSizeof("__SIZEOF_POINTER__", TI.getPointerWidth(0), TI, Builder); 998 DefineTypeSizeof("__SIZEOF_SHORT__", TI.getShortWidth(), TI, Builder); 999 DefineTypeSizeof("__SIZEOF_PTRDIFF_T__", 1000 TI.getTypeWidth(TI.getPtrDiffType(0)), TI, Builder); 1001 DefineTypeSizeof("__SIZEOF_SIZE_T__", 1002 TI.getTypeWidth(TI.getSizeType()), TI, Builder); 1003 DefineTypeSizeof("__SIZEOF_WCHAR_T__", 1004 TI.getTypeWidth(TI.getWCharType()), TI, Builder); 1005 DefineTypeSizeof("__SIZEOF_WINT_T__", 1006 TI.getTypeWidth(TI.getWIntType()), TI, Builder); 1007 if (TI.hasInt128Type()) 1008 DefineTypeSizeof("__SIZEOF_INT128__", 128, TI, Builder); 1009 1010 DefineType("__INTMAX_TYPE__", TI.getIntMaxType(), Builder); 1011 DefineFmt("__INTMAX", TI.getIntMaxType(), TI, Builder); 1012 Builder.defineMacro("__INTMAX_C_SUFFIX__", 1013 TI.getTypeConstantSuffix(TI.getIntMaxType())); 1014 DefineType("__UINTMAX_TYPE__", TI.getUIntMaxType(), Builder); 1015 DefineFmt("__UINTMAX", TI.getUIntMaxType(), TI, Builder); 1016 Builder.defineMacro("__UINTMAX_C_SUFFIX__", 1017 TI.getTypeConstantSuffix(TI.getUIntMaxType())); 1018 DefineType("__PTRDIFF_TYPE__", TI.getPtrDiffType(0), Builder); 1019 DefineFmt("__PTRDIFF", TI.getPtrDiffType(0), TI, Builder); 1020 DefineType("__INTPTR_TYPE__", TI.getIntPtrType(), Builder); 1021 DefineFmt("__INTPTR", TI.getIntPtrType(), TI, Builder); 1022 DefineType("__SIZE_TYPE__", TI.getSizeType(), Builder); 1023 DefineFmt("__SIZE", TI.getSizeType(), TI, Builder); 1024 DefineType("__WCHAR_TYPE__", TI.getWCharType(), Builder); 1025 DefineType("__WINT_TYPE__", TI.getWIntType(), Builder); 1026 DefineTypeSizeAndWidth("__SIG_ATOMIC", TI.getSigAtomicType(), TI, Builder); 1027 DefineType("__CHAR16_TYPE__", TI.getChar16Type(), Builder); 1028 DefineType("__CHAR32_TYPE__", TI.getChar32Type(), Builder); 1029 1030 DefineType("__UINTPTR_TYPE__", TI.getUIntPtrType(), Builder); 1031 DefineFmt("__UINTPTR", TI.getUIntPtrType(), TI, Builder); 1032 1033 // The C standard requires the width of uintptr_t and intptr_t to be the same, 1034 // per 7.20.2.4p1. Same for intmax_t and uintmax_t, per 7.20.2.5p1. 1035 assert(TI.getTypeWidth(TI.getUIntPtrType()) == 1036 TI.getTypeWidth(TI.getIntPtrType()) && 1037 "uintptr_t and intptr_t have different widths?"); 1038 assert(TI.getTypeWidth(TI.getUIntMaxType()) == 1039 TI.getTypeWidth(TI.getIntMaxType()) && 1040 "uintmax_t and intmax_t have different widths?"); 1041 1042 if (TI.hasFloat16Type()) 1043 DefineFloatMacros(Builder, "FLT16", &TI.getHalfFormat(), "F16"); 1044 DefineFloatMacros(Builder, "FLT", &TI.getFloatFormat(), "F"); 1045 DefineFloatMacros(Builder, "DBL", &TI.getDoubleFormat(), ""); 1046 DefineFloatMacros(Builder, "LDBL", &TI.getLongDoubleFormat(), "L"); 1047 1048 // Define a __POINTER_WIDTH__ macro for stdint.h. 1049 Builder.defineMacro("__POINTER_WIDTH__", 1050 Twine((int)TI.getPointerWidth(0))); 1051 1052 // Define __BIGGEST_ALIGNMENT__ to be compatible with gcc. 1053 Builder.defineMacro("__BIGGEST_ALIGNMENT__", 1054 Twine(TI.getSuitableAlign() / TI.getCharWidth()) ); 1055 1056 if (!LangOpts.CharIsSigned) 1057 Builder.defineMacro("__CHAR_UNSIGNED__"); 1058 1059 if (!TargetInfo::isTypeSigned(TI.getWCharType())) 1060 Builder.defineMacro("__WCHAR_UNSIGNED__"); 1061 1062 if (!TargetInfo::isTypeSigned(TI.getWIntType())) 1063 Builder.defineMacro("__WINT_UNSIGNED__"); 1064 1065 // Define exact-width integer types for stdint.h 1066 DefineExactWidthIntType(TargetInfo::SignedChar, TI, Builder); 1067 1068 if (TI.getShortWidth() > TI.getCharWidth()) 1069 DefineExactWidthIntType(TargetInfo::SignedShort, TI, Builder); 1070 1071 if (TI.getIntWidth() > TI.getShortWidth()) 1072 DefineExactWidthIntType(TargetInfo::SignedInt, TI, Builder); 1073 1074 if (TI.getLongWidth() > TI.getIntWidth()) 1075 DefineExactWidthIntType(TargetInfo::SignedLong, TI, Builder); 1076 1077 if (TI.getLongLongWidth() > TI.getLongWidth()) 1078 DefineExactWidthIntType(TargetInfo::SignedLongLong, TI, Builder); 1079 1080 DefineExactWidthIntType(TargetInfo::UnsignedChar, TI, Builder); 1081 DefineExactWidthIntTypeSize(TargetInfo::UnsignedChar, TI, Builder); 1082 DefineExactWidthIntTypeSize(TargetInfo::SignedChar, TI, Builder); 1083 1084 if (TI.getShortWidth() > TI.getCharWidth()) { 1085 DefineExactWidthIntType(TargetInfo::UnsignedShort, TI, Builder); 1086 DefineExactWidthIntTypeSize(TargetInfo::UnsignedShort, TI, Builder); 1087 DefineExactWidthIntTypeSize(TargetInfo::SignedShort, TI, Builder); 1088 } 1089 1090 if (TI.getIntWidth() > TI.getShortWidth()) { 1091 DefineExactWidthIntType(TargetInfo::UnsignedInt, TI, Builder); 1092 DefineExactWidthIntTypeSize(TargetInfo::UnsignedInt, TI, Builder); 1093 DefineExactWidthIntTypeSize(TargetInfo::SignedInt, TI, Builder); 1094 } 1095 1096 if (TI.getLongWidth() > TI.getIntWidth()) { 1097 DefineExactWidthIntType(TargetInfo::UnsignedLong, TI, Builder); 1098 DefineExactWidthIntTypeSize(TargetInfo::UnsignedLong, TI, Builder); 1099 DefineExactWidthIntTypeSize(TargetInfo::SignedLong, TI, Builder); 1100 } 1101 1102 if (TI.getLongLongWidth() > TI.getLongWidth()) { 1103 DefineExactWidthIntType(TargetInfo::UnsignedLongLong, TI, Builder); 1104 DefineExactWidthIntTypeSize(TargetInfo::UnsignedLongLong, TI, Builder); 1105 DefineExactWidthIntTypeSize(TargetInfo::SignedLongLong, TI, Builder); 1106 } 1107 1108 DefineLeastWidthIntType(8, true, TI, Builder); 1109 DefineLeastWidthIntType(8, false, TI, Builder); 1110 DefineLeastWidthIntType(16, true, TI, Builder); 1111 DefineLeastWidthIntType(16, false, TI, Builder); 1112 DefineLeastWidthIntType(32, true, TI, Builder); 1113 DefineLeastWidthIntType(32, false, TI, Builder); 1114 DefineLeastWidthIntType(64, true, TI, Builder); 1115 DefineLeastWidthIntType(64, false, TI, Builder); 1116 1117 DefineFastIntType(8, true, TI, Builder); 1118 DefineFastIntType(8, false, TI, Builder); 1119 DefineFastIntType(16, true, TI, Builder); 1120 DefineFastIntType(16, false, TI, Builder); 1121 DefineFastIntType(32, true, TI, Builder); 1122 DefineFastIntType(32, false, TI, Builder); 1123 DefineFastIntType(64, true, TI, Builder); 1124 DefineFastIntType(64, false, TI, Builder); 1125 1126 Builder.defineMacro("__USER_LABEL_PREFIX__", TI.getUserLabelPrefix()); 1127 1128 if (!LangOpts.MathErrno) 1129 Builder.defineMacro("__NO_MATH_ERRNO__"); 1130 1131 if (LangOpts.FastMath || LangOpts.FiniteMathOnly) 1132 Builder.defineMacro("__FINITE_MATH_ONLY__", "1"); 1133 else 1134 Builder.defineMacro("__FINITE_MATH_ONLY__", "0"); 1135 1136 if (LangOpts.GNUCVersion) { 1137 if (LangOpts.GNUInline || LangOpts.CPlusPlus) 1138 Builder.defineMacro("__GNUC_GNU_INLINE__"); 1139 else 1140 Builder.defineMacro("__GNUC_STDC_INLINE__"); 1141 1142 // The value written by __atomic_test_and_set. 1143 // FIXME: This is target-dependent. 1144 Builder.defineMacro("__GCC_ATOMIC_TEST_AND_SET_TRUEVAL", "1"); 1145 } 1146 1147 auto addLockFreeMacros = [&](const llvm::Twine &Prefix) { 1148 // Used by libc++ and libstdc++ to implement ATOMIC_<foo>_LOCK_FREE. 1149 unsigned InlineWidthBits = TI.getMaxAtomicInlineWidth(); 1150 #define DEFINE_LOCK_FREE_MACRO(TYPE, Type) \ 1151 Builder.defineMacro(Prefix + #TYPE "_LOCK_FREE", \ 1152 getLockFreeValue(TI.get##Type##Width(), \ 1153 TI.get##Type##Align(), \ 1154 InlineWidthBits)); 1155 DEFINE_LOCK_FREE_MACRO(BOOL, Bool); 1156 DEFINE_LOCK_FREE_MACRO(CHAR, Char); 1157 if (LangOpts.Char8) 1158 DEFINE_LOCK_FREE_MACRO(CHAR8_T, Char); // Treat char8_t like char. 1159 DEFINE_LOCK_FREE_MACRO(CHAR16_T, Char16); 1160 DEFINE_LOCK_FREE_MACRO(CHAR32_T, Char32); 1161 DEFINE_LOCK_FREE_MACRO(WCHAR_T, WChar); 1162 DEFINE_LOCK_FREE_MACRO(SHORT, Short); 1163 DEFINE_LOCK_FREE_MACRO(INT, Int); 1164 DEFINE_LOCK_FREE_MACRO(LONG, Long); 1165 DEFINE_LOCK_FREE_MACRO(LLONG, LongLong); 1166 Builder.defineMacro(Prefix + "POINTER_LOCK_FREE", 1167 getLockFreeValue(TI.getPointerWidth(0), 1168 TI.getPointerAlign(0), 1169 InlineWidthBits)); 1170 #undef DEFINE_LOCK_FREE_MACRO 1171 }; 1172 addLockFreeMacros("__CLANG_ATOMIC_"); 1173 if (LangOpts.GNUCVersion) 1174 addLockFreeMacros("__GCC_ATOMIC_"); 1175 1176 if (LangOpts.NoInlineDefine) 1177 Builder.defineMacro("__NO_INLINE__"); 1178 1179 if (unsigned PICLevel = LangOpts.PICLevel) { 1180 Builder.defineMacro("__PIC__", Twine(PICLevel)); 1181 Builder.defineMacro("__pic__", Twine(PICLevel)); 1182 if (LangOpts.PIE) { 1183 Builder.defineMacro("__PIE__", Twine(PICLevel)); 1184 Builder.defineMacro("__pie__", Twine(PICLevel)); 1185 } 1186 } 1187 1188 // Macros to control C99 numerics and <float.h> 1189 Builder.defineMacro("__FLT_RADIX__", "2"); 1190 Builder.defineMacro("__DECIMAL_DIG__", "__LDBL_DECIMAL_DIG__"); 1191 1192 if (LangOpts.getStackProtector() == LangOptions::SSPOn) 1193 Builder.defineMacro("__SSP__"); 1194 else if (LangOpts.getStackProtector() == LangOptions::SSPStrong) 1195 Builder.defineMacro("__SSP_STRONG__", "2"); 1196 else if (LangOpts.getStackProtector() == LangOptions::SSPReq) 1197 Builder.defineMacro("__SSP_ALL__", "3"); 1198 1199 if (PPOpts.SetUpStaticAnalyzer) 1200 Builder.defineMacro("__clang_analyzer__"); 1201 1202 if (LangOpts.FastRelaxedMath) 1203 Builder.defineMacro("__FAST_RELAXED_MATH__"); 1204 1205 if (FEOpts.ProgramAction == frontend::RewriteObjC || 1206 LangOpts.getGC() != LangOptions::NonGC) { 1207 Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))"); 1208 Builder.defineMacro("__strong", "__attribute__((objc_gc(strong)))"); 1209 Builder.defineMacro("__autoreleasing", ""); 1210 Builder.defineMacro("__unsafe_unretained", ""); 1211 } else if (LangOpts.ObjC) { 1212 Builder.defineMacro("__weak", "__attribute__((objc_ownership(weak)))"); 1213 Builder.defineMacro("__strong", "__attribute__((objc_ownership(strong)))"); 1214 Builder.defineMacro("__autoreleasing", 1215 "__attribute__((objc_ownership(autoreleasing)))"); 1216 Builder.defineMacro("__unsafe_unretained", 1217 "__attribute__((objc_ownership(none)))"); 1218 } 1219 1220 // On Darwin, there are __double_underscored variants of the type 1221 // nullability qualifiers. 1222 if (TI.getTriple().isOSDarwin()) { 1223 Builder.defineMacro("__nonnull", "_Nonnull"); 1224 Builder.defineMacro("__null_unspecified", "_Null_unspecified"); 1225 Builder.defineMacro("__nullable", "_Nullable"); 1226 } 1227 1228 // Add a macro to differentiate between regular iOS/tvOS/watchOS targets and 1229 // the corresponding simulator targets. 1230 if (TI.getTriple().isOSDarwin() && TI.getTriple().isSimulatorEnvironment()) 1231 Builder.defineMacro("__APPLE_EMBEDDED_SIMULATOR__", "1"); 1232 1233 // OpenMP definition 1234 // OpenMP 2.2: 1235 // In implementations that support a preprocessor, the _OPENMP 1236 // macro name is defined to have the decimal value yyyymm where 1237 // yyyy and mm are the year and the month designations of the 1238 // version of the OpenMP API that the implementation support. 1239 if (!LangOpts.OpenMPSimd) { 1240 switch (LangOpts.OpenMP) { 1241 case 0: 1242 break; 1243 case 31: 1244 Builder.defineMacro("_OPENMP", "201107"); 1245 break; 1246 case 40: 1247 Builder.defineMacro("_OPENMP", "201307"); 1248 break; 1249 case 45: 1250 Builder.defineMacro("_OPENMP", "201511"); 1251 break; 1252 case 51: 1253 Builder.defineMacro("_OPENMP", "202011"); 1254 break; 1255 case 52: 1256 Builder.defineMacro("_OPENMP", "202111"); 1257 break; 1258 default: 1259 // Default version is OpenMP 5.0 1260 Builder.defineMacro("_OPENMP", "201811"); 1261 break; 1262 } 1263 } 1264 1265 // CUDA device path compilaton 1266 if (LangOpts.CUDAIsDevice && !LangOpts.HIP) { 1267 // The CUDA_ARCH value is set for the GPU target specified in the NVPTX 1268 // backend's target defines. 1269 Builder.defineMacro("__CUDA_ARCH__"); 1270 } 1271 1272 // We need to communicate this to our CUDA header wrapper, which in turn 1273 // informs the proper CUDA headers of this choice. 1274 if (LangOpts.CUDADeviceApproxTranscendentals || LangOpts.FastMath) { 1275 Builder.defineMacro("__CLANG_CUDA_APPROX_TRANSCENDENTALS__"); 1276 } 1277 1278 // Define a macro indicating that the source file is being compiled with a 1279 // SYCL device compiler which doesn't produce host binary. 1280 if (LangOpts.SYCLIsDevice) { 1281 Builder.defineMacro("__SYCL_DEVICE_ONLY__", "1"); 1282 } 1283 1284 // OpenCL definitions. 1285 if (LangOpts.OpenCL) { 1286 InitializeOpenCLFeatureTestMacros(TI, LangOpts, Builder); 1287 1288 if (TI.getTriple().isSPIR() || TI.getTriple().isSPIRV()) 1289 Builder.defineMacro("__IMAGE_SUPPORT__"); 1290 } 1291 1292 if (TI.hasInt128Type() && LangOpts.CPlusPlus && LangOpts.GNUMode) { 1293 // For each extended integer type, g++ defines a macro mapping the 1294 // index of the type (0 in this case) in some list of extended types 1295 // to the type. 1296 Builder.defineMacro("__GLIBCXX_TYPE_INT_N_0", "__int128"); 1297 Builder.defineMacro("__GLIBCXX_BITSIZE_INT_N_0", "128"); 1298 } 1299 1300 // Get other target #defines. 1301 TI.getTargetDefines(LangOpts, Builder); 1302 } 1303 1304 /// InitializePreprocessor - Initialize the preprocessor getting it and the 1305 /// environment ready to process a single file. This returns true on error. 1306 /// 1307 void clang::InitializePreprocessor( 1308 Preprocessor &PP, const PreprocessorOptions &InitOpts, 1309 const PCHContainerReader &PCHContainerRdr, 1310 const FrontendOptions &FEOpts) { 1311 const LangOptions &LangOpts = PP.getLangOpts(); 1312 std::string PredefineBuffer; 1313 PredefineBuffer.reserve(4080); 1314 llvm::raw_string_ostream Predefines(PredefineBuffer); 1315 MacroBuilder Builder(Predefines); 1316 1317 // Emit line markers for various builtin sections of the file. We don't do 1318 // this in asm preprocessor mode, because "# 4" is not a line marker directive 1319 // in this mode. 1320 if (!PP.getLangOpts().AsmPreprocessor) 1321 Builder.append("# 1 \"<built-in>\" 3"); 1322 1323 // Install things like __POWERPC__, __GNUC__, etc into the macro table. 1324 if (InitOpts.UsePredefines) { 1325 // FIXME: This will create multiple definitions for most of the predefined 1326 // macros. This is not the right way to handle this. 1327 if ((LangOpts.CUDA || LangOpts.OpenMPIsDevice || LangOpts.SYCLIsDevice) && 1328 PP.getAuxTargetInfo()) 1329 InitializePredefinedMacros(*PP.getAuxTargetInfo(), LangOpts, FEOpts, 1330 PP.getPreprocessorOpts(), Builder); 1331 1332 InitializePredefinedMacros(PP.getTargetInfo(), LangOpts, FEOpts, 1333 PP.getPreprocessorOpts(), Builder); 1334 1335 // Install definitions to make Objective-C++ ARC work well with various 1336 // C++ Standard Library implementations. 1337 if (LangOpts.ObjC && LangOpts.CPlusPlus && 1338 (LangOpts.ObjCAutoRefCount || LangOpts.ObjCWeak)) { 1339 switch (InitOpts.ObjCXXARCStandardLibrary) { 1340 case ARCXX_nolib: 1341 case ARCXX_libcxx: 1342 break; 1343 1344 case ARCXX_libstdcxx: 1345 AddObjCXXARCLibstdcxxDefines(LangOpts, Builder); 1346 break; 1347 } 1348 } 1349 } 1350 1351 // Even with predefines off, some macros are still predefined. 1352 // These should all be defined in the preprocessor according to the 1353 // current language configuration. 1354 InitializeStandardPredefinedMacros(PP.getTargetInfo(), PP.getLangOpts(), 1355 FEOpts, Builder); 1356 1357 // Add on the predefines from the driver. Wrap in a #line directive to report 1358 // that they come from the command line. 1359 if (!PP.getLangOpts().AsmPreprocessor) 1360 Builder.append("# 1 \"<command line>\" 1"); 1361 1362 // Process #define's and #undef's in the order they are given. 1363 for (unsigned i = 0, e = InitOpts.Macros.size(); i != e; ++i) { 1364 if (InitOpts.Macros[i].second) // isUndef 1365 Builder.undefineMacro(InitOpts.Macros[i].first); 1366 else 1367 DefineBuiltinMacro(Builder, InitOpts.Macros[i].first, 1368 PP.getDiagnostics()); 1369 } 1370 1371 // Exit the command line and go back to <built-in> (2 is LC_LEAVE). 1372 if (!PP.getLangOpts().AsmPreprocessor) 1373 Builder.append("# 1 \"<built-in>\" 2"); 1374 1375 // If -imacros are specified, include them now. These are processed before 1376 // any -include directives. 1377 for (unsigned i = 0, e = InitOpts.MacroIncludes.size(); i != e; ++i) 1378 AddImplicitIncludeMacros(Builder, InitOpts.MacroIncludes[i]); 1379 1380 // Process -include-pch/-include-pth directives. 1381 if (!InitOpts.ImplicitPCHInclude.empty()) 1382 AddImplicitIncludePCH(Builder, PP, PCHContainerRdr, 1383 InitOpts.ImplicitPCHInclude); 1384 1385 // Process -include directives. 1386 for (unsigned i = 0, e = InitOpts.Includes.size(); i != e; ++i) { 1387 const std::string &Path = InitOpts.Includes[i]; 1388 AddImplicitInclude(Builder, Path); 1389 } 1390 1391 // Instruct the preprocessor to skip the preamble. 1392 PP.setSkipMainFilePreamble(InitOpts.PrecompiledPreambleBytes.first, 1393 InitOpts.PrecompiledPreambleBytes.second); 1394 1395 // Copy PredefinedBuffer into the Preprocessor. 1396 PP.setPredefines(Predefines.str()); 1397 } 1398