1 //===--- InitPreprocessor.cpp - PP initialization code. ---------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the clang::InitializePreprocessor function.
12 //===----------------------------------------------------------------------===//
14 #include "clang/Basic/FileManager.h"
15 #include "clang/Basic/MacroBuilder.h"
16 #include "clang/Basic/SourceManager.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/PTHManager.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 using namespace clang;
30 static bool MacroBodyEndsInBackslash(StringRef MacroBody) {
31 while (!MacroBody.empty() && isWhitespace(MacroBody.back()))
32 MacroBody = MacroBody.drop_back();
33 return !MacroBody.empty() && MacroBody.back() == '\\';
36 // Append a #define line to Buf for Macro. Macro should be of the form XXX,
37 // in which case we emit "#define XXX 1" or "XXX=Y z W" in which case we emit
38 // "#define XXX Y z W". To get a #define with no value, use "XXX=".
39 static void DefineBuiltinMacro(MacroBuilder &Builder, StringRef Macro,
40 DiagnosticsEngine &Diags) {
41 std::pair<StringRef, StringRef> MacroPair = Macro.split('=');
42 StringRef MacroName = MacroPair.first;
43 StringRef MacroBody = MacroPair.second;
44 if (MacroName.size() != Macro.size()) {
45 // Per GCC -D semantics, the macro ends at \n if it exists.
46 StringRef::size_type End = MacroBody.find_first_of("\n\r");
47 if (End != StringRef::npos)
48 Diags.Report(diag::warn_fe_macro_contains_embedded_newline)
50 MacroBody = MacroBody.substr(0, End);
51 // We handle macro bodies which end in a backslash by appending an extra
52 // backslash+newline. This makes sure we don't accidentally treat the
53 // backslash as a line continuation marker.
54 if (MacroBodyEndsInBackslash(MacroBody))
55 Builder.defineMacro(MacroName, Twine(MacroBody) + "\\\n");
57 Builder.defineMacro(MacroName, MacroBody);
59 // Push "macroname 1".
60 Builder.defineMacro(Macro);
64 /// AddImplicitInclude - Add an implicit \#include of the specified file to the
65 /// predefines buffer.
66 /// As these includes are generated by -include arguments the header search
67 /// logic is going to search relatively to the current working directory.
68 static void AddImplicitInclude(MacroBuilder &Builder, StringRef File) {
69 Builder.append(Twine("#include \"") + File + "\"");
72 static void AddImplicitIncludeMacros(MacroBuilder &Builder, StringRef File) {
73 Builder.append(Twine("#__include_macros \"") + File + "\"");
74 // Marker token to stop the __include_macros fetch loop.
75 Builder.append("##"); // ##?
78 /// AddImplicitIncludePTH - Add an implicit \#include using the original file
79 /// used to generate a PTH cache.
80 static void AddImplicitIncludePTH(MacroBuilder &Builder, Preprocessor &PP,
81 StringRef ImplicitIncludePTH) {
82 PTHManager *P = PP.getPTHManager();
83 // Null check 'P' in the corner case where it couldn't be created.
84 const char *OriginalFile = P ? P->getOriginalSourceFile() : nullptr;
87 PP.getDiagnostics().Report(diag::err_fe_pth_file_has_no_source_header)
88 << ImplicitIncludePTH;
92 AddImplicitInclude(Builder, OriginalFile);
95 /// \brief Add an implicit \#include using the original file used to generate
97 static void AddImplicitIncludePCH(MacroBuilder &Builder, Preprocessor &PP,
98 const PCHContainerReader &PCHContainerRdr,
99 StringRef ImplicitIncludePCH) {
100 std::string OriginalFile =
101 ASTReader::getOriginalSourceFile(ImplicitIncludePCH, PP.getFileManager(),
102 PCHContainerRdr, PP.getDiagnostics());
103 if (OriginalFile.empty())
106 AddImplicitInclude(Builder, OriginalFile);
109 /// PickFP - This is used to pick a value based on the FP semantics of the
110 /// specified FP model.
111 template <typename T>
112 static T PickFP(const llvm::fltSemantics *Sem, T IEEESingleVal,
113 T IEEEDoubleVal, T X87DoubleExtendedVal, T PPCDoubleDoubleVal,
115 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEsingle())
116 return IEEESingleVal;
117 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEdouble())
118 return IEEEDoubleVal;
119 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::x87DoubleExtended())
120 return X87DoubleExtendedVal;
121 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::PPCDoubleDouble())
122 return PPCDoubleDoubleVal;
123 assert(Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEquad());
127 static void DefineFloatMacros(MacroBuilder &Builder, StringRef Prefix,
128 const llvm::fltSemantics *Sem, StringRef Ext) {
129 const char *DenormMin, *Epsilon, *Max, *Min;
130 DenormMin = PickFP(Sem, "1.40129846e-45", "4.9406564584124654e-324",
131 "3.64519953188247460253e-4951",
132 "4.94065645841246544176568792868221e-324",
133 "6.47517511943802511092443895822764655e-4966");
134 int Digits = PickFP(Sem, 6, 15, 18, 31, 33);
135 int DecimalDigits = PickFP(Sem, 9, 17, 21, 33, 36);
136 Epsilon = PickFP(Sem, "1.19209290e-7", "2.2204460492503131e-16",
137 "1.08420217248550443401e-19",
138 "4.94065645841246544176568792868221e-324",
139 "1.92592994438723585305597794258492732e-34");
140 int MantissaDigits = PickFP(Sem, 24, 53, 64, 106, 113);
141 int Min10Exp = PickFP(Sem, -37, -307, -4931, -291, -4931);
142 int Max10Exp = PickFP(Sem, 38, 308, 4932, 308, 4932);
143 int MinExp = PickFP(Sem, -125, -1021, -16381, -968, -16381);
144 int MaxExp = PickFP(Sem, 128, 1024, 16384, 1024, 16384);
145 Min = PickFP(Sem, "1.17549435e-38", "2.2250738585072014e-308",
146 "3.36210314311209350626e-4932",
147 "2.00416836000897277799610805135016e-292",
148 "3.36210314311209350626267781732175260e-4932");
149 Max = PickFP(Sem, "3.40282347e+38", "1.7976931348623157e+308",
150 "1.18973149535723176502e+4932",
151 "1.79769313486231580793728971405301e+308",
152 "1.18973149535723176508575932662800702e+4932");
154 SmallString<32> DefPrefix;
159 Builder.defineMacro(DefPrefix + "DENORM_MIN__", Twine(DenormMin)+Ext);
160 Builder.defineMacro(DefPrefix + "HAS_DENORM__");
161 Builder.defineMacro(DefPrefix + "DIG__", Twine(Digits));
162 Builder.defineMacro(DefPrefix + "DECIMAL_DIG__", Twine(DecimalDigits));
163 Builder.defineMacro(DefPrefix + "EPSILON__", Twine(Epsilon)+Ext);
164 Builder.defineMacro(DefPrefix + "HAS_INFINITY__");
165 Builder.defineMacro(DefPrefix + "HAS_QUIET_NAN__");
166 Builder.defineMacro(DefPrefix + "MANT_DIG__", Twine(MantissaDigits));
168 Builder.defineMacro(DefPrefix + "MAX_10_EXP__", Twine(Max10Exp));
169 Builder.defineMacro(DefPrefix + "MAX_EXP__", Twine(MaxExp));
170 Builder.defineMacro(DefPrefix + "MAX__", Twine(Max)+Ext);
172 Builder.defineMacro(DefPrefix + "MIN_10_EXP__","("+Twine(Min10Exp)+")");
173 Builder.defineMacro(DefPrefix + "MIN_EXP__", "("+Twine(MinExp)+")");
174 Builder.defineMacro(DefPrefix + "MIN__", Twine(Min)+Ext);
178 /// DefineTypeSize - Emit a macro to the predefines buffer that declares a macro
179 /// named MacroName with the max value for a type with width 'TypeWidth' a
180 /// signedness of 'isSigned' and with a value suffix of 'ValSuffix' (e.g. LL).
181 static void DefineTypeSize(const Twine &MacroName, unsigned TypeWidth,
182 StringRef ValSuffix, bool isSigned,
183 MacroBuilder &Builder) {
184 llvm::APInt MaxVal = isSigned ? llvm::APInt::getSignedMaxValue(TypeWidth)
185 : llvm::APInt::getMaxValue(TypeWidth);
186 Builder.defineMacro(MacroName, MaxVal.toString(10, isSigned) + ValSuffix);
189 /// DefineTypeSize - An overloaded helper that uses TargetInfo to determine
190 /// the width, suffix, and signedness of the given type
191 static void DefineTypeSize(const Twine &MacroName, TargetInfo::IntType Ty,
192 const TargetInfo &TI, MacroBuilder &Builder) {
193 DefineTypeSize(MacroName, TI.getTypeWidth(Ty), TI.getTypeConstantSuffix(Ty),
194 TI.isTypeSigned(Ty), Builder);
197 static void DefineFmt(const Twine &Prefix, TargetInfo::IntType Ty,
198 const TargetInfo &TI, MacroBuilder &Builder) {
199 bool IsSigned = TI.isTypeSigned(Ty);
200 StringRef FmtModifier = TI.getTypeFormatModifier(Ty);
201 for (const char *Fmt = IsSigned ? "di" : "ouxX"; *Fmt; ++Fmt) {
202 Builder.defineMacro(Prefix + "_FMT" + Twine(*Fmt) + "__",
203 Twine("\"") + FmtModifier + Twine(*Fmt) + "\"");
207 static void DefineType(const Twine &MacroName, TargetInfo::IntType Ty,
208 MacroBuilder &Builder) {
209 Builder.defineMacro(MacroName, TargetInfo::getTypeName(Ty));
212 static void DefineTypeWidth(StringRef MacroName, TargetInfo::IntType Ty,
213 const TargetInfo &TI, MacroBuilder &Builder) {
214 Builder.defineMacro(MacroName, Twine(TI.getTypeWidth(Ty)));
217 static void DefineTypeSizeof(StringRef MacroName, unsigned BitWidth,
218 const TargetInfo &TI, MacroBuilder &Builder) {
219 Builder.defineMacro(MacroName,
220 Twine(BitWidth / TI.getCharWidth()));
223 static void DefineExactWidthIntType(TargetInfo::IntType Ty,
224 const TargetInfo &TI,
225 MacroBuilder &Builder) {
226 int TypeWidth = TI.getTypeWidth(Ty);
227 bool IsSigned = TI.isTypeSigned(Ty);
229 // Use the target specified int64 type, when appropriate, so that [u]int64_t
230 // ends up being defined in terms of the correct type.
232 Ty = IsSigned ? TI.getInt64Type() : TI.getUInt64Type();
234 const char *Prefix = IsSigned ? "__INT" : "__UINT";
236 DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder);
237 DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder);
239 StringRef ConstSuffix(TI.getTypeConstantSuffix(Ty));
240 Builder.defineMacro(Prefix + Twine(TypeWidth) + "_C_SUFFIX__", ConstSuffix);
243 static void DefineExactWidthIntTypeSize(TargetInfo::IntType Ty,
244 const TargetInfo &TI,
245 MacroBuilder &Builder) {
246 int TypeWidth = TI.getTypeWidth(Ty);
247 bool IsSigned = TI.isTypeSigned(Ty);
249 // Use the target specified int64 type, when appropriate, so that [u]int64_t
250 // ends up being defined in terms of the correct type.
252 Ty = IsSigned ? TI.getInt64Type() : TI.getUInt64Type();
254 const char *Prefix = IsSigned ? "__INT" : "__UINT";
255 DefineTypeSize(Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder);
258 static void DefineLeastWidthIntType(unsigned TypeWidth, bool IsSigned,
259 const TargetInfo &TI,
260 MacroBuilder &Builder) {
261 TargetInfo::IntType Ty = TI.getLeastIntTypeByWidth(TypeWidth, IsSigned);
262 if (Ty == TargetInfo::NoInt)
265 const char *Prefix = IsSigned ? "__INT_LEAST" : "__UINT_LEAST";
266 DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder);
267 DefineTypeSize(Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder);
268 DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder);
271 static void DefineFastIntType(unsigned TypeWidth, bool IsSigned,
272 const TargetInfo &TI, MacroBuilder &Builder) {
273 // stdint.h currently defines the fast int types as equivalent to the least
275 TargetInfo::IntType Ty = TI.getLeastIntTypeByWidth(TypeWidth, IsSigned);
276 if (Ty == TargetInfo::NoInt)
279 const char *Prefix = IsSigned ? "__INT_FAST" : "__UINT_FAST";
280 DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder);
281 DefineTypeSize(Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder);
283 DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder);
287 /// Get the value the ATOMIC_*_LOCK_FREE macro should have for a type with
288 /// the specified properties.
289 static const char *getLockFreeValue(unsigned TypeWidth, unsigned TypeAlign,
290 unsigned InlineWidth) {
291 // Fully-aligned, power-of-2 sizes no larger than the inline
292 // width will be inlined as lock-free operations.
293 if (TypeWidth == TypeAlign && (TypeWidth & (TypeWidth - 1)) == 0 &&
294 TypeWidth <= InlineWidth)
295 return "2"; // "always lock free"
296 // We cannot be certain what operations the lib calls might be
297 // able to implement as lock-free on future processors.
298 return "1"; // "sometimes lock free"
301 /// \brief Add definitions required for a smooth interaction between
302 /// Objective-C++ automated reference counting and libstdc++ (4.2).
303 static void AddObjCXXARCLibstdcxxDefines(const LangOptions &LangOpts,
304 MacroBuilder &Builder) {
305 Builder.defineMacro("_GLIBCXX_PREDEFINED_OBJC_ARC_IS_SCALAR");
309 // Provide specializations for the __is_scalar type trait so that
310 // lifetime-qualified objects are not considered "scalar" types, which
311 // libstdc++ uses as an indicator of the presence of trivial copy, assign,
312 // default-construct, and destruct semantics (none of which hold for
313 // lifetime-qualified objects in ARC).
314 llvm::raw_string_ostream Out(Result);
316 Out << "namespace std {\n"
318 << "struct __true_type;\n"
319 << "struct __false_type;\n"
322 Out << "template<typename _Tp> struct __is_scalar;\n"
325 if (LangOpts.ObjCAutoRefCount) {
326 Out << "template<typename _Tp>\n"
327 << "struct __is_scalar<__attribute__((objc_ownership(strong))) _Tp> {\n"
328 << " enum { __value = 0 };\n"
329 << " typedef __false_type __type;\n"
334 if (LangOpts.ObjCWeak) {
335 Out << "template<typename _Tp>\n"
336 << "struct __is_scalar<__attribute__((objc_ownership(weak))) _Tp> {\n"
337 << " enum { __value = 0 };\n"
338 << " typedef __false_type __type;\n"
343 if (LangOpts.ObjCAutoRefCount) {
344 Out << "template<typename _Tp>\n"
345 << "struct __is_scalar<__attribute__((objc_ownership(autoreleasing)))"
347 << " enum { __value = 0 };\n"
348 << " typedef __false_type __type;\n"
355 Builder.append(Result);
358 static void InitializeStandardPredefinedMacros(const TargetInfo &TI,
359 const LangOptions &LangOpts,
360 const FrontendOptions &FEOpts,
361 MacroBuilder &Builder) {
362 if (!LangOpts.MSVCCompat && !LangOpts.TraditionalCPP)
363 Builder.defineMacro("__STDC__");
364 if (LangOpts.Freestanding)
365 Builder.defineMacro("__STDC_HOSTED__", "0");
367 Builder.defineMacro("__STDC_HOSTED__");
369 if (!LangOpts.CPlusPlus) {
371 Builder.defineMacro("__STDC_VERSION__", "201112L");
372 else if (LangOpts.C99)
373 Builder.defineMacro("__STDC_VERSION__", "199901L");
374 else if (!LangOpts.GNUMode && LangOpts.Digraphs)
375 Builder.defineMacro("__STDC_VERSION__", "199409L");
377 // FIXME: Use correct value for C++20.
378 if (LangOpts.CPlusPlus2a)
379 Builder.defineMacro("__cplusplus", "201707L");
380 // C++17 [cpp.predefined]p1:
381 // The name __cplusplus is defined to the value 201703L when compiling a
382 // C++ translation unit.
383 else if (LangOpts.CPlusPlus1z)
384 Builder.defineMacro("__cplusplus", "201703L");
385 // C++1y [cpp.predefined]p1:
386 // The name __cplusplus is defined to the value 201402L when compiling a
387 // C++ translation unit.
388 else if (LangOpts.CPlusPlus14)
389 Builder.defineMacro("__cplusplus", "201402L");
390 // C++11 [cpp.predefined]p1:
391 // The name __cplusplus is defined to the value 201103L when compiling a
392 // C++ translation unit.
393 else if (LangOpts.CPlusPlus11)
394 Builder.defineMacro("__cplusplus", "201103L");
395 // C++03 [cpp.predefined]p1:
396 // The name __cplusplus is defined to the value 199711L when compiling a
397 // C++ translation unit.
399 Builder.defineMacro("__cplusplus", "199711L");
401 // C++1z [cpp.predefined]p1:
402 // An integer literal of type std::size_t whose value is the alignment
403 // guaranteed by a call to operator new(std::size_t)
405 // We provide this in all language modes, since it seems generally useful.
406 Builder.defineMacro("__STDCPP_DEFAULT_NEW_ALIGNMENT__",
407 Twine(TI.getNewAlign() / TI.getCharWidth()) +
408 TI.getTypeConstantSuffix(TI.getSizeType()));
411 // In C11 these are environment macros. In C++11 they are only defined
412 // as part of <cuchar>. To prevent breakage when mixing C and C++
413 // code, define these macros unconditionally. We can define them
414 // unconditionally, as Clang always uses UTF-16 and UTF-32 for 16-bit
415 // and 32-bit character literals.
416 Builder.defineMacro("__STDC_UTF_16__", "1");
417 Builder.defineMacro("__STDC_UTF_32__", "1");
420 Builder.defineMacro("__OBJC__");
422 // OpenCL v1.0/1.1 s6.9, v1.2/2.0 s6.10: Preprocessor Directives and Macros.
423 if (LangOpts.OpenCL) {
424 // OpenCL v1.0 and v1.1 do not have a predefined macro to indicate the
425 // language standard with which the program is compiled. __OPENCL_VERSION__
426 // is for the OpenCL version supported by the OpenCL device, which is not
427 // necessarily the language standard with which the program is compiled.
428 // A shared OpenCL header file requires a macro to indicate the language
429 // standard. As a workaround, __OPENCL_C_VERSION__ is defined for
430 // OpenCL v1.0 and v1.1.
431 switch (LangOpts.OpenCLVersion) {
433 Builder.defineMacro("__OPENCL_C_VERSION__", "100");
436 Builder.defineMacro("__OPENCL_C_VERSION__", "110");
439 Builder.defineMacro("__OPENCL_C_VERSION__", "120");
442 Builder.defineMacro("__OPENCL_C_VERSION__", "200");
445 llvm_unreachable("Unsupported OpenCL version");
447 Builder.defineMacro("CL_VERSION_1_0", "100");
448 Builder.defineMacro("CL_VERSION_1_1", "110");
449 Builder.defineMacro("CL_VERSION_1_2", "120");
450 Builder.defineMacro("CL_VERSION_2_0", "200");
452 if (TI.isLittleEndian())
453 Builder.defineMacro("__ENDIAN_LITTLE__");
455 if (LangOpts.FastRelaxedMath)
456 Builder.defineMacro("__FAST_RELAXED_MATH__");
458 // Not "standard" per se, but available even with the -undef flag.
459 if (LangOpts.AsmPreprocessor)
460 Builder.defineMacro("__ASSEMBLER__");
462 Builder.defineMacro("__CUDA__");
465 /// Initialize the predefined C++ language feature test macros defined in
466 /// ISO/IEC JTC1/SC22/WG21 (C++) SD-6: "SG10 Feature Test Recommendations".
467 static void InitializeCPlusPlusFeatureTestMacros(const LangOptions &LangOpts,
468 MacroBuilder &Builder) {
471 Builder.defineMacro("__cpp_rtti", "199711");
472 if (LangOpts.CXXExceptions)
473 Builder.defineMacro("__cpp_exceptions", "199711");
476 if (LangOpts.CPlusPlus11) {
477 Builder.defineMacro("__cpp_unicode_characters", "200704");
478 Builder.defineMacro("__cpp_raw_strings", "200710");
479 Builder.defineMacro("__cpp_unicode_literals", "200710");
480 Builder.defineMacro("__cpp_user_defined_literals", "200809");
481 Builder.defineMacro("__cpp_lambdas", "200907");
482 Builder.defineMacro("__cpp_constexpr",
483 LangOpts.CPlusPlus1z ? "201603" :
484 LangOpts.CPlusPlus14 ? "201304" : "200704");
485 Builder.defineMacro("__cpp_range_based_for",
486 LangOpts.CPlusPlus1z ? "201603" : "200907");
487 Builder.defineMacro("__cpp_static_assert",
488 LangOpts.CPlusPlus1z ? "201411" : "200410");
489 Builder.defineMacro("__cpp_decltype", "200707");
490 Builder.defineMacro("__cpp_attributes", "200809");
491 Builder.defineMacro("__cpp_rvalue_references", "200610");
492 Builder.defineMacro("__cpp_variadic_templates", "200704");
493 Builder.defineMacro("__cpp_initializer_lists", "200806");
494 Builder.defineMacro("__cpp_delegating_constructors", "200604");
495 Builder.defineMacro("__cpp_nsdmi", "200809");
496 Builder.defineMacro("__cpp_inheriting_constructors", "201511");
497 Builder.defineMacro("__cpp_ref_qualifiers", "200710");
498 Builder.defineMacro("__cpp_alias_templates", "200704");
502 if (LangOpts.CPlusPlus14) {
503 Builder.defineMacro("__cpp_binary_literals", "201304");
504 Builder.defineMacro("__cpp_digit_separators", "201309");
505 Builder.defineMacro("__cpp_init_captures", "201304");
506 Builder.defineMacro("__cpp_generic_lambdas", "201304");
507 Builder.defineMacro("__cpp_decltype_auto", "201304");
508 Builder.defineMacro("__cpp_return_type_deduction", "201304");
509 Builder.defineMacro("__cpp_aggregate_nsdmi", "201304");
510 Builder.defineMacro("__cpp_variable_templates", "201304");
512 if (LangOpts.SizedDeallocation)
513 Builder.defineMacro("__cpp_sized_deallocation", "201309");
516 if (LangOpts.CPlusPlus1z) {
517 Builder.defineMacro("__cpp_hex_float", "201603");
518 Builder.defineMacro("__cpp_inline_variables", "201606");
519 Builder.defineMacro("__cpp_noexcept_function_type", "201510");
520 Builder.defineMacro("__cpp_capture_star_this", "201603");
521 Builder.defineMacro("__cpp_if_constexpr", "201606");
522 Builder.defineMacro("__cpp_template_auto", "201606");
523 Builder.defineMacro("__cpp_namespace_attributes", "201411");
524 Builder.defineMacro("__cpp_enumerator_attributes", "201411");
525 Builder.defineMacro("__cpp_nested_namespace_definitions", "201411");
526 Builder.defineMacro("__cpp_variadic_using", "201611");
527 Builder.defineMacro("__cpp_aggregate_bases", "201603");
528 Builder.defineMacro("__cpp_structured_bindings", "201606");
529 Builder.defineMacro("__cpp_nontype_template_args", "201411");
530 Builder.defineMacro("__cpp_fold_expressions", "201603");
531 // FIXME: This is not yet listed in SD-6.
532 Builder.defineMacro("__cpp_deduction_guides", "201611");
534 if (LangOpts.AlignedAllocation)
535 Builder.defineMacro("__cpp_aligned_new", "201606");
538 if (LangOpts.ConceptsTS)
539 Builder.defineMacro("__cpp_experimental_concepts", "1");
540 if (LangOpts.CoroutinesTS)
541 Builder.defineMacro("__cpp_coroutines", "201703L");
544 static void InitializePredefinedMacros(const TargetInfo &TI,
545 const LangOptions &LangOpts,
546 const FrontendOptions &FEOpts,
547 MacroBuilder &Builder) {
548 // Compiler version introspection macros.
549 Builder.defineMacro("__llvm__"); // LLVM Backend
550 Builder.defineMacro("__clang__"); // Clang Frontend
552 #define TOSTR(X) TOSTR2(X)
553 Builder.defineMacro("__clang_major__", TOSTR(CLANG_VERSION_MAJOR));
554 Builder.defineMacro("__clang_minor__", TOSTR(CLANG_VERSION_MINOR));
555 Builder.defineMacro("__clang_patchlevel__", TOSTR(CLANG_VERSION_PATCHLEVEL));
558 Builder.defineMacro("__clang_version__",
559 "\"" CLANG_VERSION_STRING " "
560 + getClangFullRepositoryVersion() + "\"");
561 if (!LangOpts.MSVCCompat) {
562 // Currently claim to be compatible with GCC 4.2.1-5621, but only if we're
563 // not compiling for MSVC compatibility
564 Builder.defineMacro("__GNUC_MINOR__", "2");
565 Builder.defineMacro("__GNUC_PATCHLEVEL__", "1");
566 Builder.defineMacro("__GNUC__", "4");
567 Builder.defineMacro("__GXX_ABI_VERSION", "1002");
570 // Define macros for the C11 / C++11 memory orderings
571 Builder.defineMacro("__ATOMIC_RELAXED", "0");
572 Builder.defineMacro("__ATOMIC_CONSUME", "1");
573 Builder.defineMacro("__ATOMIC_ACQUIRE", "2");
574 Builder.defineMacro("__ATOMIC_RELEASE", "3");
575 Builder.defineMacro("__ATOMIC_ACQ_REL", "4");
576 Builder.defineMacro("__ATOMIC_SEQ_CST", "5");
578 // Support for #pragma redefine_extname (Sun compatibility)
579 Builder.defineMacro("__PRAGMA_REDEFINE_EXTNAME", "1");
581 // As sad as it is, enough software depends on the __VERSION__ for version
582 // checks that it is necessary to report 4.2.1 (the base GCC version we claim
583 // compatibility with) first.
584 Builder.defineMacro("__VERSION__", "\"4.2.1 Compatible " +
585 Twine(getClangFullCPPVersion()) + "\"");
587 // Initialize language-specific preprocessor defines.
589 // Standard conforming mode?
590 if (!LangOpts.GNUMode && !LangOpts.MSVCCompat)
591 Builder.defineMacro("__STRICT_ANSI__");
593 if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus11)
594 Builder.defineMacro("__GXX_EXPERIMENTAL_CXX0X__");
596 if (LangOpts.ObjC1) {
597 if (LangOpts.ObjCRuntime.isNonFragile()) {
598 Builder.defineMacro("__OBJC2__");
600 if (LangOpts.ObjCExceptions)
601 Builder.defineMacro("OBJC_ZEROCOST_EXCEPTIONS");
604 if (LangOpts.getGC() != LangOptions::NonGC)
605 Builder.defineMacro("__OBJC_GC__");
607 if (LangOpts.ObjCRuntime.isNeXTFamily())
608 Builder.defineMacro("__NEXT_RUNTIME__");
610 if (LangOpts.ObjCRuntime.getKind() == ObjCRuntime::ObjFW) {
611 VersionTuple tuple = LangOpts.ObjCRuntime.getVersion();
614 if (tuple.getMinor().hasValue())
615 minor = tuple.getMinor().getValue();
617 unsigned subminor = 0;
618 if (tuple.getSubminor().hasValue())
619 subminor = tuple.getSubminor().getValue();
621 Builder.defineMacro("__OBJFW_RUNTIME_ABI__",
622 Twine(tuple.getMajor() * 10000 + minor * 100 +
626 Builder.defineMacro("IBOutlet", "__attribute__((iboutlet))");
627 Builder.defineMacro("IBOutletCollection(ClassName)",
628 "__attribute__((iboutletcollection(ClassName)))");
629 Builder.defineMacro("IBAction", "void)__attribute__((ibaction)");
630 Builder.defineMacro("IBInspectable", "");
631 Builder.defineMacro("IB_DESIGNABLE", "");
634 // Define a macro that describes the Objective-C boolean type even for C
635 // and C++ since BOOL can be used from non Objective-C code.
636 Builder.defineMacro("__OBJC_BOOL_IS_BOOL",
637 Twine(TI.useSignedCharForObjCBool() ? "0" : "1"));
639 if (LangOpts.CPlusPlus)
640 InitializeCPlusPlusFeatureTestMacros(LangOpts, Builder);
642 // darwin_constant_cfstrings controls this. This is also dependent
643 // on other things like the runtime I believe. This is set even for C code.
644 if (!LangOpts.NoConstantCFStrings)
645 Builder.defineMacro("__CONSTANT_CFSTRINGS__");
648 Builder.defineMacro("OBJC_NEW_PROPERTIES");
650 if (LangOpts.PascalStrings)
651 Builder.defineMacro("__PASCAL_STRINGS__");
653 if (LangOpts.Blocks) {
654 Builder.defineMacro("__block", "__attribute__((__blocks__(byref)))");
655 Builder.defineMacro("__BLOCKS__");
658 if (!LangOpts.MSVCCompat && LangOpts.Exceptions)
659 Builder.defineMacro("__EXCEPTIONS");
660 if (!LangOpts.MSVCCompat && LangOpts.RTTI)
661 Builder.defineMacro("__GXX_RTTI");
662 if (LangOpts.SjLjExceptions)
663 Builder.defineMacro("__USING_SJLJ_EXCEPTIONS__");
665 if (LangOpts.Deprecated)
666 Builder.defineMacro("__DEPRECATED");
668 if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus) {
669 Builder.defineMacro("__GNUG__", "4");
670 Builder.defineMacro("__GXX_WEAK__");
671 Builder.defineMacro("__private_extern__", "extern");
674 if (LangOpts.MicrosoftExt) {
675 if (LangOpts.WChar) {
676 // wchar_t supported as a keyword.
677 Builder.defineMacro("_WCHAR_T_DEFINED");
678 Builder.defineMacro("_NATIVE_WCHAR_T_DEFINED");
682 if (LangOpts.Optimize)
683 Builder.defineMacro("__OPTIMIZE__");
684 if (LangOpts.OptimizeSize)
685 Builder.defineMacro("__OPTIMIZE_SIZE__");
687 if (LangOpts.FastMath)
688 Builder.defineMacro("__FAST_MATH__");
690 // Initialize target-specific preprocessor defines.
692 // __BYTE_ORDER__ was added in GCC 4.6. It's analogous
693 // to the macro __BYTE_ORDER (no trailing underscores)
694 // from glibc's <endian.h> header.
695 // We don't support the PDP-11 as a target, but include
696 // the define so it can still be compared against.
697 Builder.defineMacro("__ORDER_LITTLE_ENDIAN__", "1234");
698 Builder.defineMacro("__ORDER_BIG_ENDIAN__", "4321");
699 Builder.defineMacro("__ORDER_PDP_ENDIAN__", "3412");
700 if (TI.isBigEndian()) {
701 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_BIG_ENDIAN__");
702 Builder.defineMacro("__BIG_ENDIAN__");
704 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_LITTLE_ENDIAN__");
705 Builder.defineMacro("__LITTLE_ENDIAN__");
708 if (TI.getPointerWidth(0) == 64 && TI.getLongWidth() == 64
709 && TI.getIntWidth() == 32) {
710 Builder.defineMacro("_LP64");
711 Builder.defineMacro("__LP64__");
714 if (TI.getPointerWidth(0) == 32 && TI.getLongWidth() == 32
715 && TI.getIntWidth() == 32) {
716 Builder.defineMacro("_ILP32");
717 Builder.defineMacro("__ILP32__");
720 // Define type sizing macros based on the target properties.
721 assert(TI.getCharWidth() == 8 && "Only support 8-bit char so far");
722 Builder.defineMacro("__CHAR_BIT__", Twine(TI.getCharWidth()));
724 DefineTypeSize("__SCHAR_MAX__", TargetInfo::SignedChar, TI, Builder);
725 DefineTypeSize("__SHRT_MAX__", TargetInfo::SignedShort, TI, Builder);
726 DefineTypeSize("__INT_MAX__", TargetInfo::SignedInt, TI, Builder);
727 DefineTypeSize("__LONG_MAX__", TargetInfo::SignedLong, TI, Builder);
728 DefineTypeSize("__LONG_LONG_MAX__", TargetInfo::SignedLongLong, TI, Builder);
729 DefineTypeSize("__WCHAR_MAX__", TI.getWCharType(), TI, Builder);
730 DefineTypeSize("__INTMAX_MAX__", TI.getIntMaxType(), TI, Builder);
731 DefineTypeSize("__SIZE_MAX__", TI.getSizeType(), TI, Builder);
733 DefineTypeSize("__UINTMAX_MAX__", TI.getUIntMaxType(), TI, Builder);
734 DefineTypeSize("__PTRDIFF_MAX__", TI.getPtrDiffType(0), TI, Builder);
735 DefineTypeSize("__INTPTR_MAX__", TI.getIntPtrType(), TI, Builder);
736 DefineTypeSize("__UINTPTR_MAX__", TI.getUIntPtrType(), TI, Builder);
738 DefineTypeSizeof("__SIZEOF_DOUBLE__", TI.getDoubleWidth(), TI, Builder);
739 DefineTypeSizeof("__SIZEOF_FLOAT__", TI.getFloatWidth(), TI, Builder);
740 DefineTypeSizeof("__SIZEOF_INT__", TI.getIntWidth(), TI, Builder);
741 DefineTypeSizeof("__SIZEOF_LONG__", TI.getLongWidth(), TI, Builder);
742 DefineTypeSizeof("__SIZEOF_LONG_DOUBLE__",TI.getLongDoubleWidth(),TI,Builder);
743 DefineTypeSizeof("__SIZEOF_LONG_LONG__", TI.getLongLongWidth(), TI, Builder);
744 DefineTypeSizeof("__SIZEOF_POINTER__", TI.getPointerWidth(0), TI, Builder);
745 DefineTypeSizeof("__SIZEOF_SHORT__", TI.getShortWidth(), TI, Builder);
746 DefineTypeSizeof("__SIZEOF_PTRDIFF_T__",
747 TI.getTypeWidth(TI.getPtrDiffType(0)), TI, Builder);
748 DefineTypeSizeof("__SIZEOF_SIZE_T__",
749 TI.getTypeWidth(TI.getSizeType()), TI, Builder);
750 DefineTypeSizeof("__SIZEOF_WCHAR_T__",
751 TI.getTypeWidth(TI.getWCharType()), TI, Builder);
752 DefineTypeSizeof("__SIZEOF_WINT_T__",
753 TI.getTypeWidth(TI.getWIntType()), TI, Builder);
754 if (TI.hasInt128Type())
755 DefineTypeSizeof("__SIZEOF_INT128__", 128, TI, Builder);
757 DefineType("__INTMAX_TYPE__", TI.getIntMaxType(), Builder);
758 DefineFmt("__INTMAX", TI.getIntMaxType(), TI, Builder);
759 Builder.defineMacro("__INTMAX_C_SUFFIX__",
760 TI.getTypeConstantSuffix(TI.getIntMaxType()));
761 DefineType("__UINTMAX_TYPE__", TI.getUIntMaxType(), Builder);
762 DefineFmt("__UINTMAX", TI.getUIntMaxType(), TI, Builder);
763 Builder.defineMacro("__UINTMAX_C_SUFFIX__",
764 TI.getTypeConstantSuffix(TI.getUIntMaxType()));
765 DefineTypeWidth("__INTMAX_WIDTH__", TI.getIntMaxType(), TI, Builder);
766 DefineType("__PTRDIFF_TYPE__", TI.getPtrDiffType(0), Builder);
767 DefineFmt("__PTRDIFF", TI.getPtrDiffType(0), TI, Builder);
768 DefineTypeWidth("__PTRDIFF_WIDTH__", TI.getPtrDiffType(0), TI, Builder);
769 DefineType("__INTPTR_TYPE__", TI.getIntPtrType(), Builder);
770 DefineFmt("__INTPTR", TI.getIntPtrType(), TI, Builder);
771 DefineTypeWidth("__INTPTR_WIDTH__", TI.getIntPtrType(), TI, Builder);
772 DefineType("__SIZE_TYPE__", TI.getSizeType(), Builder);
773 DefineFmt("__SIZE", TI.getSizeType(), TI, Builder);
774 DefineTypeWidth("__SIZE_WIDTH__", TI.getSizeType(), TI, Builder);
775 DefineType("__WCHAR_TYPE__", TI.getWCharType(), Builder);
776 DefineTypeWidth("__WCHAR_WIDTH__", TI.getWCharType(), TI, Builder);
777 DefineType("__WINT_TYPE__", TI.getWIntType(), Builder);
778 DefineTypeWidth("__WINT_WIDTH__", TI.getWIntType(), TI, Builder);
779 DefineTypeWidth("__SIG_ATOMIC_WIDTH__", TI.getSigAtomicType(), TI, Builder);
780 DefineTypeSize("__SIG_ATOMIC_MAX__", TI.getSigAtomicType(), TI, Builder);
781 DefineType("__CHAR16_TYPE__", TI.getChar16Type(), Builder);
782 DefineType("__CHAR32_TYPE__", TI.getChar32Type(), Builder);
784 DefineTypeWidth("__UINTMAX_WIDTH__", TI.getUIntMaxType(), TI, Builder);
785 DefineType("__UINTPTR_TYPE__", TI.getUIntPtrType(), Builder);
786 DefineFmt("__UINTPTR", TI.getUIntPtrType(), TI, Builder);
787 DefineTypeWidth("__UINTPTR_WIDTH__", TI.getUIntPtrType(), TI, Builder);
789 DefineFloatMacros(Builder, "FLT", &TI.getFloatFormat(), "F");
790 DefineFloatMacros(Builder, "DBL", &TI.getDoubleFormat(), "");
791 DefineFloatMacros(Builder, "LDBL", &TI.getLongDoubleFormat(), "L");
793 // Define a __POINTER_WIDTH__ macro for stdint.h.
794 Builder.defineMacro("__POINTER_WIDTH__",
795 Twine((int)TI.getPointerWidth(0)));
797 // Define __BIGGEST_ALIGNMENT__ to be compatible with gcc.
798 Builder.defineMacro("__BIGGEST_ALIGNMENT__",
799 Twine(TI.getSuitableAlign() / TI.getCharWidth()) );
801 if (!LangOpts.CharIsSigned)
802 Builder.defineMacro("__CHAR_UNSIGNED__");
804 if (!TargetInfo::isTypeSigned(TI.getWCharType()))
805 Builder.defineMacro("__WCHAR_UNSIGNED__");
807 if (!TargetInfo::isTypeSigned(TI.getWIntType()))
808 Builder.defineMacro("__WINT_UNSIGNED__");
810 // Define exact-width integer types for stdint.h
811 DefineExactWidthIntType(TargetInfo::SignedChar, TI, Builder);
813 if (TI.getShortWidth() > TI.getCharWidth())
814 DefineExactWidthIntType(TargetInfo::SignedShort, TI, Builder);
816 if (TI.getIntWidth() > TI.getShortWidth())
817 DefineExactWidthIntType(TargetInfo::SignedInt, TI, Builder);
819 if (TI.getLongWidth() > TI.getIntWidth())
820 DefineExactWidthIntType(TargetInfo::SignedLong, TI, Builder);
822 if (TI.getLongLongWidth() > TI.getLongWidth())
823 DefineExactWidthIntType(TargetInfo::SignedLongLong, TI, Builder);
825 DefineExactWidthIntType(TargetInfo::UnsignedChar, TI, Builder);
826 DefineExactWidthIntTypeSize(TargetInfo::UnsignedChar, TI, Builder);
827 DefineExactWidthIntTypeSize(TargetInfo::SignedChar, TI, Builder);
829 if (TI.getShortWidth() > TI.getCharWidth()) {
830 DefineExactWidthIntType(TargetInfo::UnsignedShort, TI, Builder);
831 DefineExactWidthIntTypeSize(TargetInfo::UnsignedShort, TI, Builder);
832 DefineExactWidthIntTypeSize(TargetInfo::SignedShort, TI, Builder);
835 if (TI.getIntWidth() > TI.getShortWidth()) {
836 DefineExactWidthIntType(TargetInfo::UnsignedInt, TI, Builder);
837 DefineExactWidthIntTypeSize(TargetInfo::UnsignedInt, TI, Builder);
838 DefineExactWidthIntTypeSize(TargetInfo::SignedInt, TI, Builder);
841 if (TI.getLongWidth() > TI.getIntWidth()) {
842 DefineExactWidthIntType(TargetInfo::UnsignedLong, TI, Builder);
843 DefineExactWidthIntTypeSize(TargetInfo::UnsignedLong, TI, Builder);
844 DefineExactWidthIntTypeSize(TargetInfo::SignedLong, TI, Builder);
847 if (TI.getLongLongWidth() > TI.getLongWidth()) {
848 DefineExactWidthIntType(TargetInfo::UnsignedLongLong, TI, Builder);
849 DefineExactWidthIntTypeSize(TargetInfo::UnsignedLongLong, TI, Builder);
850 DefineExactWidthIntTypeSize(TargetInfo::SignedLongLong, TI, Builder);
853 DefineLeastWidthIntType(8, true, TI, Builder);
854 DefineLeastWidthIntType(8, false, TI, Builder);
855 DefineLeastWidthIntType(16, true, TI, Builder);
856 DefineLeastWidthIntType(16, false, TI, Builder);
857 DefineLeastWidthIntType(32, true, TI, Builder);
858 DefineLeastWidthIntType(32, false, TI, Builder);
859 DefineLeastWidthIntType(64, true, TI, Builder);
860 DefineLeastWidthIntType(64, false, TI, Builder);
862 DefineFastIntType(8, true, TI, Builder);
863 DefineFastIntType(8, false, TI, Builder);
864 DefineFastIntType(16, true, TI, Builder);
865 DefineFastIntType(16, false, TI, Builder);
866 DefineFastIntType(32, true, TI, Builder);
867 DefineFastIntType(32, false, TI, Builder);
868 DefineFastIntType(64, true, TI, Builder);
869 DefineFastIntType(64, false, TI, Builder);
871 char UserLabelPrefix[2] = {TI.getDataLayout().getGlobalPrefix(), 0};
872 Builder.defineMacro("__USER_LABEL_PREFIX__", UserLabelPrefix);
874 if (LangOpts.FastMath || LangOpts.FiniteMathOnly)
875 Builder.defineMacro("__FINITE_MATH_ONLY__", "1");
877 Builder.defineMacro("__FINITE_MATH_ONLY__", "0");
879 if (!LangOpts.MSVCCompat) {
880 if (LangOpts.GNUInline || LangOpts.CPlusPlus)
881 Builder.defineMacro("__GNUC_GNU_INLINE__");
883 Builder.defineMacro("__GNUC_STDC_INLINE__");
885 // The value written by __atomic_test_and_set.
886 // FIXME: This is target-dependent.
887 Builder.defineMacro("__GCC_ATOMIC_TEST_AND_SET_TRUEVAL", "1");
890 auto addLockFreeMacros = [&](const llvm::Twine &Prefix) {
891 // Used by libc++ and libstdc++ to implement ATOMIC_<foo>_LOCK_FREE.
892 unsigned InlineWidthBits = TI.getMaxAtomicInlineWidth();
893 #define DEFINE_LOCK_FREE_MACRO(TYPE, Type) \
894 Builder.defineMacro(Prefix + #TYPE "_LOCK_FREE", \
895 getLockFreeValue(TI.get##Type##Width(), \
896 TI.get##Type##Align(), \
898 DEFINE_LOCK_FREE_MACRO(BOOL, Bool);
899 DEFINE_LOCK_FREE_MACRO(CHAR, Char);
900 DEFINE_LOCK_FREE_MACRO(CHAR16_T, Char16);
901 DEFINE_LOCK_FREE_MACRO(CHAR32_T, Char32);
902 DEFINE_LOCK_FREE_MACRO(WCHAR_T, WChar);
903 DEFINE_LOCK_FREE_MACRO(SHORT, Short);
904 DEFINE_LOCK_FREE_MACRO(INT, Int);
905 DEFINE_LOCK_FREE_MACRO(LONG, Long);
906 DEFINE_LOCK_FREE_MACRO(LLONG, LongLong);
907 Builder.defineMacro(Prefix + "POINTER_LOCK_FREE",
908 getLockFreeValue(TI.getPointerWidth(0),
909 TI.getPointerAlign(0),
911 #undef DEFINE_LOCK_FREE_MACRO
913 addLockFreeMacros("__CLANG_ATOMIC_");
914 if (!LangOpts.MSVCCompat)
915 addLockFreeMacros("__GCC_ATOMIC_");
917 if (LangOpts.NoInlineDefine)
918 Builder.defineMacro("__NO_INLINE__");
920 if (unsigned PICLevel = LangOpts.PICLevel) {
921 Builder.defineMacro("__PIC__", Twine(PICLevel));
922 Builder.defineMacro("__pic__", Twine(PICLevel));
924 Builder.defineMacro("__PIE__", Twine(PICLevel));
925 Builder.defineMacro("__pie__", Twine(PICLevel));
929 // Macros to control C99 numerics and <float.h>
930 Builder.defineMacro("__FLT_EVAL_METHOD__", Twine(TI.getFloatEvalMethod()));
931 Builder.defineMacro("__FLT_RADIX__", "2");
932 Builder.defineMacro("__DECIMAL_DIG__", "__LDBL_DECIMAL_DIG__");
934 if (LangOpts.getStackProtector() == LangOptions::SSPOn)
935 Builder.defineMacro("__SSP__");
936 else if (LangOpts.getStackProtector() == LangOptions::SSPStrong)
937 Builder.defineMacro("__SSP_STRONG__", "2");
938 else if (LangOpts.getStackProtector() == LangOptions::SSPReq)
939 Builder.defineMacro("__SSP_ALL__", "3");
941 // Define a macro that exists only when using the static analyzer.
942 if (FEOpts.ProgramAction == frontend::RunAnalysis)
943 Builder.defineMacro("__clang_analyzer__");
945 if (LangOpts.FastRelaxedMath)
946 Builder.defineMacro("__FAST_RELAXED_MATH__");
948 if (FEOpts.ProgramAction == frontend::RewriteObjC ||
949 LangOpts.getGC() != LangOptions::NonGC) {
950 Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))");
951 Builder.defineMacro("__strong", "__attribute__((objc_gc(strong)))");
952 Builder.defineMacro("__autoreleasing", "");
953 Builder.defineMacro("__unsafe_unretained", "");
954 } else if (LangOpts.ObjC1) {
955 Builder.defineMacro("__weak", "__attribute__((objc_ownership(weak)))");
956 Builder.defineMacro("__strong", "__attribute__((objc_ownership(strong)))");
957 Builder.defineMacro("__autoreleasing",
958 "__attribute__((objc_ownership(autoreleasing)))");
959 Builder.defineMacro("__unsafe_unretained",
960 "__attribute__((objc_ownership(none)))");
963 // On Darwin, there are __double_underscored variants of the type
964 // nullability qualifiers.
965 if (TI.getTriple().isOSDarwin()) {
966 Builder.defineMacro("__nonnull", "_Nonnull");
967 Builder.defineMacro("__null_unspecified", "_Null_unspecified");
968 Builder.defineMacro("__nullable", "_Nullable");
973 // In implementations that support a preprocessor, the _OPENMP
974 // macro name is defined to have the decimal value yyyymm where
975 // yyyy and mm are the year and the month designations of the
976 // version of the OpenMP API that the implementation support.
977 switch (LangOpts.OpenMP) {
981 Builder.defineMacro("_OPENMP", "201307");
984 Builder.defineMacro("_OPENMP", "201511");
987 // Default version is OpenMP 3.1
988 Builder.defineMacro("_OPENMP", "201107");
992 // CUDA device path compilaton
993 if (LangOpts.CUDAIsDevice) {
994 // The CUDA_ARCH value is set for the GPU target specified in the NVPTX
995 // backend's target defines.
996 Builder.defineMacro("__CUDA_ARCH__");
999 // We need to communicate this to our CUDA header wrapper, which in turn
1000 // informs the proper CUDA headers of this choice.
1001 if (LangOpts.CUDADeviceApproxTranscendentals || LangOpts.FastMath) {
1002 Builder.defineMacro("__CLANG_CUDA_APPROX_TRANSCENDENTALS__");
1005 // OpenCL definitions.
1006 if (LangOpts.OpenCL) {
1007 #define OPENCLEXT(Ext) \
1008 if (TI.getSupportedOpenCLOpts().isSupported(#Ext, \
1009 LangOpts.OpenCLVersion)) \
1010 Builder.defineMacro(#Ext);
1011 #include "clang/Basic/OpenCLExtensions.def"
1014 if (TI.hasInt128Type() && LangOpts.CPlusPlus && LangOpts.GNUMode) {
1015 // For each extended integer type, g++ defines a macro mapping the
1016 // index of the type (0 in this case) in some list of extended types
1018 Builder.defineMacro("__GLIBCXX_TYPE_INT_N_0", "__int128");
1019 Builder.defineMacro("__GLIBCXX_BITSIZE_INT_N_0", "128");
1022 // Get other target #defines.
1023 TI.getTargetDefines(LangOpts, Builder);
1026 /// InitializePreprocessor - Initialize the preprocessor getting it and the
1027 /// environment ready to process a single file. This returns true on error.
1029 void clang::InitializePreprocessor(
1030 Preprocessor &PP, const PreprocessorOptions &InitOpts,
1031 const PCHContainerReader &PCHContainerRdr,
1032 const FrontendOptions &FEOpts) {
1033 const LangOptions &LangOpts = PP.getLangOpts();
1034 std::string PredefineBuffer;
1035 PredefineBuffer.reserve(4080);
1036 llvm::raw_string_ostream Predefines(PredefineBuffer);
1037 MacroBuilder Builder(Predefines);
1039 // Emit line markers for various builtin sections of the file. We don't do
1040 // this in asm preprocessor mode, because "# 4" is not a line marker directive
1042 if (!PP.getLangOpts().AsmPreprocessor)
1043 Builder.append("# 1 \"<built-in>\" 3");
1045 // Install things like __POWERPC__, __GNUC__, etc into the macro table.
1046 if (InitOpts.UsePredefines) {
1047 // FIXME: This will create multiple definitions for most of the predefined
1048 // macros. This is not the right way to handle this.
1049 if ((LangOpts.CUDA || LangOpts.OpenMPIsDevice) && PP.getAuxTargetInfo())
1050 InitializePredefinedMacros(*PP.getAuxTargetInfo(), LangOpts, FEOpts,
1053 InitializePredefinedMacros(PP.getTargetInfo(), LangOpts, FEOpts, Builder);
1055 // Install definitions to make Objective-C++ ARC work well with various
1056 // C++ Standard Library implementations.
1057 if (LangOpts.ObjC1 && LangOpts.CPlusPlus &&
1058 (LangOpts.ObjCAutoRefCount || LangOpts.ObjCWeak)) {
1059 switch (InitOpts.ObjCXXARCStandardLibrary) {
1064 case ARCXX_libstdcxx:
1065 AddObjCXXARCLibstdcxxDefines(LangOpts, Builder);
1071 // Even with predefines off, some macros are still predefined.
1072 // These should all be defined in the preprocessor according to the
1073 // current language configuration.
1074 InitializeStandardPredefinedMacros(PP.getTargetInfo(), PP.getLangOpts(),
1077 // Add on the predefines from the driver. Wrap in a #line directive to report
1078 // that they come from the command line.
1079 if (!PP.getLangOpts().AsmPreprocessor)
1080 Builder.append("# 1 \"<command line>\" 1");
1082 // Process #define's and #undef's in the order they are given.
1083 for (unsigned i = 0, e = InitOpts.Macros.size(); i != e; ++i) {
1084 if (InitOpts.Macros[i].second) // isUndef
1085 Builder.undefineMacro(InitOpts.Macros[i].first);
1087 DefineBuiltinMacro(Builder, InitOpts.Macros[i].first,
1088 PP.getDiagnostics());
1091 // Exit the command line and go back to <built-in> (2 is LC_LEAVE).
1092 if (!PP.getLangOpts().AsmPreprocessor)
1093 Builder.append("# 1 \"<built-in>\" 2");
1095 // If -imacros are specified, include them now. These are processed before
1096 // any -include directives.
1097 for (unsigned i = 0, e = InitOpts.MacroIncludes.size(); i != e; ++i)
1098 AddImplicitIncludeMacros(Builder, InitOpts.MacroIncludes[i]);
1100 // Process -include-pch/-include-pth directives.
1101 if (!InitOpts.ImplicitPCHInclude.empty())
1102 AddImplicitIncludePCH(Builder, PP, PCHContainerRdr,
1103 InitOpts.ImplicitPCHInclude);
1104 if (!InitOpts.ImplicitPTHInclude.empty())
1105 AddImplicitIncludePTH(Builder, PP, InitOpts.ImplicitPTHInclude);
1107 // Process -include directives.
1108 for (unsigned i = 0, e = InitOpts.Includes.size(); i != e; ++i) {
1109 const std::string &Path = InitOpts.Includes[i];
1110 AddImplicitInclude(Builder, Path);
1113 // Instruct the preprocessor to skip the preamble.
1114 PP.setSkipMainFilePreamble(InitOpts.PrecompiledPreambleBytes.first,
1115 InitOpts.PrecompiledPreambleBytes.second);
1117 // Copy PredefinedBuffer into the Preprocessor.
1118 PP.setPredefines(Predefines.str());