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 InlineWidth) {
290 // Fully-aligned, power-of-2 sizes no larger than the inline
291 // width will be inlined as lock-free operations.
292 // Note: we do not need to check alignment since _Atomic(T) is always
293 // appropriately-aligned in clang.
294 if ((TypeWidth & (TypeWidth - 1)) == 0 && 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++17.
378 if (LangOpts.CPlusPlus1z)
379 Builder.defineMacro("__cplusplus", "201406L");
380 // C++1y [cpp.predefined]p1:
381 // The name __cplusplus is defined to the value 201402L when compiling a
382 // C++ translation unit.
383 else if (LangOpts.CPlusPlus14)
384 Builder.defineMacro("__cplusplus", "201402L");
385 // C++11 [cpp.predefined]p1:
386 // The name __cplusplus is defined to the value 201103L when compiling a
387 // C++ translation unit.
388 else if (LangOpts.CPlusPlus11)
389 Builder.defineMacro("__cplusplus", "201103L");
390 // C++03 [cpp.predefined]p1:
391 // The name __cplusplus is defined to the value 199711L when compiling a
392 // C++ translation unit.
394 Builder.defineMacro("__cplusplus", "199711L");
396 // C++1z [cpp.predefined]p1:
397 // An integer literal of type std::size_t whose value is the alignment
398 // guaranteed by a call to operator new(std::size_t)
400 // We provide this in all language modes, since it seems generally useful.
401 Builder.defineMacro("__STDCPP_DEFAULT_NEW_ALIGNMENT__",
402 Twine(TI.getNewAlign() / TI.getCharWidth()) +
403 TI.getTypeConstantSuffix(TI.getSizeType()));
406 // In C11 these are environment macros. In C++11 they are only defined
407 // as part of <cuchar>. To prevent breakage when mixing C and C++
408 // code, define these macros unconditionally. We can define them
409 // unconditionally, as Clang always uses UTF-16 and UTF-32 for 16-bit
410 // and 32-bit character literals.
411 Builder.defineMacro("__STDC_UTF_16__", "1");
412 Builder.defineMacro("__STDC_UTF_32__", "1");
415 Builder.defineMacro("__OBJC__");
417 // OpenCL v1.0/1.1 s6.9, v1.2/2.0 s6.10: Preprocessor Directives and Macros.
418 if (LangOpts.OpenCL) {
419 // OpenCL v1.0 and v1.1 do not have a predefined macro to indicate the
420 // language standard with which the program is compiled. __OPENCL_VERSION__
421 // is for the OpenCL version supported by the OpenCL device, which is not
422 // necessarily the language standard with which the program is compiled.
423 // A shared OpenCL header file requires a macro to indicate the language
424 // standard. As a workaround, __OPENCL_C_VERSION__ is defined for
425 // OpenCL v1.0 and v1.1.
426 switch (LangOpts.OpenCLVersion) {
428 Builder.defineMacro("__OPENCL_C_VERSION__", "100");
431 Builder.defineMacro("__OPENCL_C_VERSION__", "110");
434 Builder.defineMacro("__OPENCL_C_VERSION__", "120");
437 Builder.defineMacro("__OPENCL_C_VERSION__", "200");
440 llvm_unreachable("Unsupported OpenCL version");
442 Builder.defineMacro("CL_VERSION_1_0", "100");
443 Builder.defineMacro("CL_VERSION_1_1", "110");
444 Builder.defineMacro("CL_VERSION_1_2", "120");
445 Builder.defineMacro("CL_VERSION_2_0", "200");
447 if (TI.isLittleEndian())
448 Builder.defineMacro("__ENDIAN_LITTLE__");
450 if (LangOpts.FastRelaxedMath)
451 Builder.defineMacro("__FAST_RELAXED_MATH__");
453 // Not "standard" per se, but available even with the -undef flag.
454 if (LangOpts.AsmPreprocessor)
455 Builder.defineMacro("__ASSEMBLER__");
457 Builder.defineMacro("__CUDA__");
460 /// Initialize the predefined C++ language feature test macros defined in
461 /// ISO/IEC JTC1/SC22/WG21 (C++) SD-6: "SG10 Feature Test Recommendations".
462 static void InitializeCPlusPlusFeatureTestMacros(const LangOptions &LangOpts,
463 MacroBuilder &Builder) {
466 Builder.defineMacro("__cpp_rtti", "199711");
467 if (LangOpts.CXXExceptions)
468 Builder.defineMacro("__cpp_exceptions", "199711");
471 if (LangOpts.CPlusPlus11) {
472 Builder.defineMacro("__cpp_unicode_characters", "200704");
473 Builder.defineMacro("__cpp_raw_strings", "200710");
474 Builder.defineMacro("__cpp_unicode_literals", "200710");
475 Builder.defineMacro("__cpp_user_defined_literals", "200809");
476 Builder.defineMacro("__cpp_lambdas", "200907");
477 Builder.defineMacro("__cpp_constexpr",
478 LangOpts.CPlusPlus14 ? "201304" : "200704");
479 Builder.defineMacro("__cpp_range_based_for",
480 LangOpts.CPlusPlus1z ? "201603" : "200907");
481 Builder.defineMacro("__cpp_static_assert",
482 LangOpts.CPlusPlus1z ? "201411" : "200410");
483 Builder.defineMacro("__cpp_decltype", "200707");
484 Builder.defineMacro("__cpp_attributes", "200809");
485 Builder.defineMacro("__cpp_rvalue_references", "200610");
486 Builder.defineMacro("__cpp_variadic_templates", "200704");
487 Builder.defineMacro("__cpp_initializer_lists", "200806");
488 Builder.defineMacro("__cpp_delegating_constructors", "200604");
489 Builder.defineMacro("__cpp_nsdmi", "200809");
490 Builder.defineMacro("__cpp_inheriting_constructors", "201511");
491 Builder.defineMacro("__cpp_ref_qualifiers", "200710");
492 Builder.defineMacro("__cpp_alias_templates", "200704");
496 if (LangOpts.CPlusPlus14) {
497 Builder.defineMacro("__cpp_binary_literals", "201304");
498 Builder.defineMacro("__cpp_digit_separators", "201309");
499 Builder.defineMacro("__cpp_init_captures", "201304");
500 Builder.defineMacro("__cpp_generic_lambdas", "201304");
501 Builder.defineMacro("__cpp_decltype_auto", "201304");
502 Builder.defineMacro("__cpp_return_type_deduction", "201304");
503 Builder.defineMacro("__cpp_aggregate_nsdmi", "201304");
504 Builder.defineMacro("__cpp_variable_templates", "201304");
506 if (LangOpts.SizedDeallocation)
507 Builder.defineMacro("__cpp_sized_deallocation", "201309");
510 if (LangOpts.CPlusPlus1z) {
511 Builder.defineMacro("__cpp_hex_float", "201603");
512 Builder.defineMacro("__cpp_inline_variables", "201606");
513 Builder.defineMacro("__cpp_noexcept_function_type", "201510");
514 Builder.defineMacro("__cpp_capture_star_this", "201603");
515 Builder.defineMacro("__cpp_if_constexpr", "201606");
516 Builder.defineMacro("__cpp_template_auto", "201606");
517 Builder.defineMacro("__cpp_namespace_attributes", "201411");
518 Builder.defineMacro("__cpp_enumerator_attributes", "201411");
519 Builder.defineMacro("__cpp_nested_namespace_definitions", "201411");
520 Builder.defineMacro("__cpp_variadic_using", "201611");
521 Builder.defineMacro("__cpp_aggregate_bases", "201603");
522 Builder.defineMacro("__cpp_structured_bindings", "201606");
523 Builder.defineMacro("__cpp_nontype_template_args", "201411");
524 Builder.defineMacro("__cpp_fold_expressions", "201603");
526 if (LangOpts.AlignedAllocation)
527 Builder.defineMacro("__cpp_aligned_new", "201606");
530 if (LangOpts.ConceptsTS)
531 Builder.defineMacro("__cpp_experimental_concepts", "1");
532 if (LangOpts.CoroutinesTS)
533 Builder.defineMacro("__cpp_coroutines", "1");
536 static void InitializePredefinedMacros(const TargetInfo &TI,
537 const LangOptions &LangOpts,
538 const FrontendOptions &FEOpts,
539 MacroBuilder &Builder) {
540 // Compiler version introspection macros.
541 Builder.defineMacro("__llvm__"); // LLVM Backend
542 Builder.defineMacro("__clang__"); // Clang Frontend
544 #define TOSTR(X) TOSTR2(X)
545 Builder.defineMacro("__clang_major__", TOSTR(CLANG_VERSION_MAJOR));
546 Builder.defineMacro("__clang_minor__", TOSTR(CLANG_VERSION_MINOR));
547 Builder.defineMacro("__clang_patchlevel__", TOSTR(CLANG_VERSION_PATCHLEVEL));
550 Builder.defineMacro("__clang_version__",
551 "\"" CLANG_VERSION_STRING " "
552 + getClangFullRepositoryVersion() + "\"");
553 if (!LangOpts.MSVCCompat) {
554 // Currently claim to be compatible with GCC 4.2.1-5621, but only if we're
555 // not compiling for MSVC compatibility
556 Builder.defineMacro("__GNUC_MINOR__", "2");
557 Builder.defineMacro("__GNUC_PATCHLEVEL__", "1");
558 Builder.defineMacro("__GNUC__", "4");
559 Builder.defineMacro("__GXX_ABI_VERSION", "1002");
562 // Define macros for the C11 / C++11 memory orderings
563 Builder.defineMacro("__ATOMIC_RELAXED", "0");
564 Builder.defineMacro("__ATOMIC_CONSUME", "1");
565 Builder.defineMacro("__ATOMIC_ACQUIRE", "2");
566 Builder.defineMacro("__ATOMIC_RELEASE", "3");
567 Builder.defineMacro("__ATOMIC_ACQ_REL", "4");
568 Builder.defineMacro("__ATOMIC_SEQ_CST", "5");
570 // Support for #pragma redefine_extname (Sun compatibility)
571 Builder.defineMacro("__PRAGMA_REDEFINE_EXTNAME", "1");
573 // As sad as it is, enough software depends on the __VERSION__ for version
574 // checks that it is necessary to report 4.2.1 (the base GCC version we claim
575 // compatibility with) first.
576 Builder.defineMacro("__VERSION__", "\"4.2.1 Compatible " +
577 Twine(getClangFullCPPVersion()) + "\"");
579 // Initialize language-specific preprocessor defines.
581 // Standard conforming mode?
582 if (!LangOpts.GNUMode && !LangOpts.MSVCCompat)
583 Builder.defineMacro("__STRICT_ANSI__");
585 if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus11)
586 Builder.defineMacro("__GXX_EXPERIMENTAL_CXX0X__");
588 if (LangOpts.ObjC1) {
589 if (LangOpts.ObjCRuntime.isNonFragile()) {
590 Builder.defineMacro("__OBJC2__");
592 if (LangOpts.ObjCExceptions)
593 Builder.defineMacro("OBJC_ZEROCOST_EXCEPTIONS");
596 Builder.defineMacro("__OBJC_BOOL_IS_BOOL",
597 Twine(TI.useSignedCharForObjCBool() ? "0" : "1"));
599 if (LangOpts.getGC() != LangOptions::NonGC)
600 Builder.defineMacro("__OBJC_GC__");
602 if (LangOpts.ObjCRuntime.isNeXTFamily())
603 Builder.defineMacro("__NEXT_RUNTIME__");
605 if (LangOpts.ObjCRuntime.getKind() == ObjCRuntime::ObjFW) {
606 VersionTuple tuple = LangOpts.ObjCRuntime.getVersion();
609 if (tuple.getMinor().hasValue())
610 minor = tuple.getMinor().getValue();
612 unsigned subminor = 0;
613 if (tuple.getSubminor().hasValue())
614 subminor = tuple.getSubminor().getValue();
616 Builder.defineMacro("__OBJFW_RUNTIME_ABI__",
617 Twine(tuple.getMajor() * 10000 + minor * 100 +
621 Builder.defineMacro("IBOutlet", "__attribute__((iboutlet))");
622 Builder.defineMacro("IBOutletCollection(ClassName)",
623 "__attribute__((iboutletcollection(ClassName)))");
624 Builder.defineMacro("IBAction", "void)__attribute__((ibaction)");
625 Builder.defineMacro("IBInspectable", "");
626 Builder.defineMacro("IB_DESIGNABLE", "");
629 if (LangOpts.CPlusPlus)
630 InitializeCPlusPlusFeatureTestMacros(LangOpts, Builder);
632 // darwin_constant_cfstrings controls this. This is also dependent
633 // on other things like the runtime I believe. This is set even for C code.
634 if (!LangOpts.NoConstantCFStrings)
635 Builder.defineMacro("__CONSTANT_CFSTRINGS__");
638 Builder.defineMacro("OBJC_NEW_PROPERTIES");
640 if (LangOpts.PascalStrings)
641 Builder.defineMacro("__PASCAL_STRINGS__");
643 if (LangOpts.Blocks) {
644 Builder.defineMacro("__block", "__attribute__((__blocks__(byref)))");
645 Builder.defineMacro("__BLOCKS__");
648 if (!LangOpts.MSVCCompat && LangOpts.Exceptions)
649 Builder.defineMacro("__EXCEPTIONS");
650 if (!LangOpts.MSVCCompat && LangOpts.RTTI)
651 Builder.defineMacro("__GXX_RTTI");
652 if (LangOpts.SjLjExceptions)
653 Builder.defineMacro("__USING_SJLJ_EXCEPTIONS__");
655 if (LangOpts.Deprecated)
656 Builder.defineMacro("__DEPRECATED");
658 if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus) {
659 Builder.defineMacro("__GNUG__", "4");
660 Builder.defineMacro("__GXX_WEAK__");
661 Builder.defineMacro("__private_extern__", "extern");
664 if (LangOpts.MicrosoftExt) {
665 if (LangOpts.WChar) {
666 // wchar_t supported as a keyword.
667 Builder.defineMacro("_WCHAR_T_DEFINED");
668 Builder.defineMacro("_NATIVE_WCHAR_T_DEFINED");
672 if (LangOpts.Optimize)
673 Builder.defineMacro("__OPTIMIZE__");
674 if (LangOpts.OptimizeSize)
675 Builder.defineMacro("__OPTIMIZE_SIZE__");
677 if (LangOpts.FastMath)
678 Builder.defineMacro("__FAST_MATH__");
680 // Initialize target-specific preprocessor defines.
682 // __BYTE_ORDER__ was added in GCC 4.6. It's analogous
683 // to the macro __BYTE_ORDER (no trailing underscores)
684 // from glibc's <endian.h> header.
685 // We don't support the PDP-11 as a target, but include
686 // the define so it can still be compared against.
687 Builder.defineMacro("__ORDER_LITTLE_ENDIAN__", "1234");
688 Builder.defineMacro("__ORDER_BIG_ENDIAN__", "4321");
689 Builder.defineMacro("__ORDER_PDP_ENDIAN__", "3412");
690 if (TI.isBigEndian()) {
691 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_BIG_ENDIAN__");
692 Builder.defineMacro("__BIG_ENDIAN__");
694 Builder.defineMacro("__BYTE_ORDER__", "__ORDER_LITTLE_ENDIAN__");
695 Builder.defineMacro("__LITTLE_ENDIAN__");
698 if (TI.getPointerWidth(0) == 64 && TI.getLongWidth() == 64
699 && TI.getIntWidth() == 32) {
700 Builder.defineMacro("_LP64");
701 Builder.defineMacro("__LP64__");
704 if (TI.getPointerWidth(0) == 32 && TI.getLongWidth() == 32
705 && TI.getIntWidth() == 32) {
706 Builder.defineMacro("_ILP32");
707 Builder.defineMacro("__ILP32__");
710 // Define type sizing macros based on the target properties.
711 assert(TI.getCharWidth() == 8 && "Only support 8-bit char so far");
712 Builder.defineMacro("__CHAR_BIT__", Twine(TI.getCharWidth()));
714 DefineTypeSize("__SCHAR_MAX__", TargetInfo::SignedChar, TI, Builder);
715 DefineTypeSize("__SHRT_MAX__", TargetInfo::SignedShort, TI, Builder);
716 DefineTypeSize("__INT_MAX__", TargetInfo::SignedInt, TI, Builder);
717 DefineTypeSize("__LONG_MAX__", TargetInfo::SignedLong, TI, Builder);
718 DefineTypeSize("__LONG_LONG_MAX__", TargetInfo::SignedLongLong, TI, Builder);
719 DefineTypeSize("__WCHAR_MAX__", TI.getWCharType(), TI, Builder);
720 DefineTypeSize("__INTMAX_MAX__", TI.getIntMaxType(), TI, Builder);
721 DefineTypeSize("__SIZE_MAX__", TI.getSizeType(), TI, Builder);
723 DefineTypeSize("__UINTMAX_MAX__", TI.getUIntMaxType(), TI, Builder);
724 DefineTypeSize("__PTRDIFF_MAX__", TI.getPtrDiffType(0), TI, Builder);
725 DefineTypeSize("__INTPTR_MAX__", TI.getIntPtrType(), TI, Builder);
726 DefineTypeSize("__UINTPTR_MAX__", TI.getUIntPtrType(), TI, Builder);
728 DefineTypeSizeof("__SIZEOF_DOUBLE__", TI.getDoubleWidth(), TI, Builder);
729 DefineTypeSizeof("__SIZEOF_FLOAT__", TI.getFloatWidth(), TI, Builder);
730 DefineTypeSizeof("__SIZEOF_INT__", TI.getIntWidth(), TI, Builder);
731 DefineTypeSizeof("__SIZEOF_LONG__", TI.getLongWidth(), TI, Builder);
732 DefineTypeSizeof("__SIZEOF_LONG_DOUBLE__",TI.getLongDoubleWidth(),TI,Builder);
733 DefineTypeSizeof("__SIZEOF_LONG_LONG__", TI.getLongLongWidth(), TI, Builder);
734 DefineTypeSizeof("__SIZEOF_POINTER__", TI.getPointerWidth(0), TI, Builder);
735 DefineTypeSizeof("__SIZEOF_SHORT__", TI.getShortWidth(), TI, Builder);
736 DefineTypeSizeof("__SIZEOF_PTRDIFF_T__",
737 TI.getTypeWidth(TI.getPtrDiffType(0)), TI, Builder);
738 DefineTypeSizeof("__SIZEOF_SIZE_T__",
739 TI.getTypeWidth(TI.getSizeType()), TI, Builder);
740 DefineTypeSizeof("__SIZEOF_WCHAR_T__",
741 TI.getTypeWidth(TI.getWCharType()), TI, Builder);
742 DefineTypeSizeof("__SIZEOF_WINT_T__",
743 TI.getTypeWidth(TI.getWIntType()), TI, Builder);
744 if (TI.hasInt128Type())
745 DefineTypeSizeof("__SIZEOF_INT128__", 128, TI, Builder);
747 DefineType("__INTMAX_TYPE__", TI.getIntMaxType(), Builder);
748 DefineFmt("__INTMAX", TI.getIntMaxType(), TI, Builder);
749 Builder.defineMacro("__INTMAX_C_SUFFIX__",
750 TI.getTypeConstantSuffix(TI.getIntMaxType()));
751 DefineType("__UINTMAX_TYPE__", TI.getUIntMaxType(), Builder);
752 DefineFmt("__UINTMAX", TI.getUIntMaxType(), TI, Builder);
753 Builder.defineMacro("__UINTMAX_C_SUFFIX__",
754 TI.getTypeConstantSuffix(TI.getUIntMaxType()));
755 DefineTypeWidth("__INTMAX_WIDTH__", TI.getIntMaxType(), TI, Builder);
756 DefineType("__PTRDIFF_TYPE__", TI.getPtrDiffType(0), Builder);
757 DefineFmt("__PTRDIFF", TI.getPtrDiffType(0), TI, Builder);
758 DefineTypeWidth("__PTRDIFF_WIDTH__", TI.getPtrDiffType(0), TI, Builder);
759 DefineType("__INTPTR_TYPE__", TI.getIntPtrType(), Builder);
760 DefineFmt("__INTPTR", TI.getIntPtrType(), TI, Builder);
761 DefineTypeWidth("__INTPTR_WIDTH__", TI.getIntPtrType(), TI, Builder);
762 DefineType("__SIZE_TYPE__", TI.getSizeType(), Builder);
763 DefineFmt("__SIZE", TI.getSizeType(), TI, Builder);
764 DefineTypeWidth("__SIZE_WIDTH__", TI.getSizeType(), TI, Builder);
765 DefineType("__WCHAR_TYPE__", TI.getWCharType(), Builder);
766 DefineTypeWidth("__WCHAR_WIDTH__", TI.getWCharType(), TI, Builder);
767 DefineType("__WINT_TYPE__", TI.getWIntType(), Builder);
768 DefineTypeWidth("__WINT_WIDTH__", TI.getWIntType(), TI, Builder);
769 DefineTypeWidth("__SIG_ATOMIC_WIDTH__", TI.getSigAtomicType(), TI, Builder);
770 DefineTypeSize("__SIG_ATOMIC_MAX__", TI.getSigAtomicType(), TI, Builder);
771 DefineType("__CHAR16_TYPE__", TI.getChar16Type(), Builder);
772 DefineType("__CHAR32_TYPE__", TI.getChar32Type(), Builder);
774 DefineTypeWidth("__UINTMAX_WIDTH__", TI.getUIntMaxType(), TI, Builder);
775 DefineType("__UINTPTR_TYPE__", TI.getUIntPtrType(), Builder);
776 DefineFmt("__UINTPTR", TI.getUIntPtrType(), TI, Builder);
777 DefineTypeWidth("__UINTPTR_WIDTH__", TI.getUIntPtrType(), TI, Builder);
779 DefineFloatMacros(Builder, "FLT", &TI.getFloatFormat(), "F");
780 DefineFloatMacros(Builder, "DBL", &TI.getDoubleFormat(), "");
781 DefineFloatMacros(Builder, "LDBL", &TI.getLongDoubleFormat(), "L");
783 // Define a __POINTER_WIDTH__ macro for stdint.h.
784 Builder.defineMacro("__POINTER_WIDTH__",
785 Twine((int)TI.getPointerWidth(0)));
787 // Define __BIGGEST_ALIGNMENT__ to be compatible with gcc.
788 Builder.defineMacro("__BIGGEST_ALIGNMENT__",
789 Twine(TI.getSuitableAlign() / TI.getCharWidth()) );
791 if (!LangOpts.CharIsSigned)
792 Builder.defineMacro("__CHAR_UNSIGNED__");
794 if (!TargetInfo::isTypeSigned(TI.getWCharType()))
795 Builder.defineMacro("__WCHAR_UNSIGNED__");
797 if (!TargetInfo::isTypeSigned(TI.getWIntType()))
798 Builder.defineMacro("__WINT_UNSIGNED__");
800 // Define exact-width integer types for stdint.h
801 DefineExactWidthIntType(TargetInfo::SignedChar, TI, Builder);
803 if (TI.getShortWidth() > TI.getCharWidth())
804 DefineExactWidthIntType(TargetInfo::SignedShort, TI, Builder);
806 if (TI.getIntWidth() > TI.getShortWidth())
807 DefineExactWidthIntType(TargetInfo::SignedInt, TI, Builder);
809 if (TI.getLongWidth() > TI.getIntWidth())
810 DefineExactWidthIntType(TargetInfo::SignedLong, TI, Builder);
812 if (TI.getLongLongWidth() > TI.getLongWidth())
813 DefineExactWidthIntType(TargetInfo::SignedLongLong, TI, Builder);
815 DefineExactWidthIntType(TargetInfo::UnsignedChar, TI, Builder);
816 DefineExactWidthIntTypeSize(TargetInfo::UnsignedChar, TI, Builder);
817 DefineExactWidthIntTypeSize(TargetInfo::SignedChar, TI, Builder);
819 if (TI.getShortWidth() > TI.getCharWidth()) {
820 DefineExactWidthIntType(TargetInfo::UnsignedShort, TI, Builder);
821 DefineExactWidthIntTypeSize(TargetInfo::UnsignedShort, TI, Builder);
822 DefineExactWidthIntTypeSize(TargetInfo::SignedShort, TI, Builder);
825 if (TI.getIntWidth() > TI.getShortWidth()) {
826 DefineExactWidthIntType(TargetInfo::UnsignedInt, TI, Builder);
827 DefineExactWidthIntTypeSize(TargetInfo::UnsignedInt, TI, Builder);
828 DefineExactWidthIntTypeSize(TargetInfo::SignedInt, TI, Builder);
831 if (TI.getLongWidth() > TI.getIntWidth()) {
832 DefineExactWidthIntType(TargetInfo::UnsignedLong, TI, Builder);
833 DefineExactWidthIntTypeSize(TargetInfo::UnsignedLong, TI, Builder);
834 DefineExactWidthIntTypeSize(TargetInfo::SignedLong, TI, Builder);
837 if (TI.getLongLongWidth() > TI.getLongWidth()) {
838 DefineExactWidthIntType(TargetInfo::UnsignedLongLong, TI, Builder);
839 DefineExactWidthIntTypeSize(TargetInfo::UnsignedLongLong, TI, Builder);
840 DefineExactWidthIntTypeSize(TargetInfo::SignedLongLong, TI, Builder);
843 DefineLeastWidthIntType(8, true, TI, Builder);
844 DefineLeastWidthIntType(8, false, TI, Builder);
845 DefineLeastWidthIntType(16, true, TI, Builder);
846 DefineLeastWidthIntType(16, false, TI, Builder);
847 DefineLeastWidthIntType(32, true, TI, Builder);
848 DefineLeastWidthIntType(32, false, TI, Builder);
849 DefineLeastWidthIntType(64, true, TI, Builder);
850 DefineLeastWidthIntType(64, false, TI, Builder);
852 DefineFastIntType(8, true, TI, Builder);
853 DefineFastIntType(8, false, TI, Builder);
854 DefineFastIntType(16, true, TI, Builder);
855 DefineFastIntType(16, false, TI, Builder);
856 DefineFastIntType(32, true, TI, Builder);
857 DefineFastIntType(32, false, TI, Builder);
858 DefineFastIntType(64, true, TI, Builder);
859 DefineFastIntType(64, false, TI, Builder);
861 char UserLabelPrefix[2] = {TI.getDataLayout().getGlobalPrefix(), 0};
862 Builder.defineMacro("__USER_LABEL_PREFIX__", UserLabelPrefix);
864 if (LangOpts.FastMath || LangOpts.FiniteMathOnly)
865 Builder.defineMacro("__FINITE_MATH_ONLY__", "1");
867 Builder.defineMacro("__FINITE_MATH_ONLY__", "0");
869 if (!LangOpts.MSVCCompat) {
870 if (LangOpts.GNUInline || LangOpts.CPlusPlus)
871 Builder.defineMacro("__GNUC_GNU_INLINE__");
873 Builder.defineMacro("__GNUC_STDC_INLINE__");
875 // The value written by __atomic_test_and_set.
876 // FIXME: This is target-dependent.
877 Builder.defineMacro("__GCC_ATOMIC_TEST_AND_SET_TRUEVAL", "1");
879 // Used by libc++ and libstdc++ to implement ATOMIC_<foo>_LOCK_FREE.
880 unsigned InlineWidthBits = TI.getMaxAtomicInlineWidth();
881 #define DEFINE_LOCK_FREE_MACRO(TYPE, Type) \
882 Builder.defineMacro("__GCC_ATOMIC_" #TYPE "_LOCK_FREE", \
883 getLockFreeValue(TI.get##Type##Width(), \
885 DEFINE_LOCK_FREE_MACRO(BOOL, Bool);
886 DEFINE_LOCK_FREE_MACRO(CHAR, Char);
887 DEFINE_LOCK_FREE_MACRO(CHAR16_T, Char16);
888 DEFINE_LOCK_FREE_MACRO(CHAR32_T, Char32);
889 DEFINE_LOCK_FREE_MACRO(WCHAR_T, WChar);
890 DEFINE_LOCK_FREE_MACRO(SHORT, Short);
891 DEFINE_LOCK_FREE_MACRO(INT, Int);
892 DEFINE_LOCK_FREE_MACRO(LONG, Long);
893 DEFINE_LOCK_FREE_MACRO(LLONG, LongLong);
894 Builder.defineMacro("__GCC_ATOMIC_POINTER_LOCK_FREE",
895 getLockFreeValue(TI.getPointerWidth(0),
897 #undef DEFINE_LOCK_FREE_MACRO
900 if (LangOpts.NoInlineDefine)
901 Builder.defineMacro("__NO_INLINE__");
903 if (unsigned PICLevel = LangOpts.PICLevel) {
904 Builder.defineMacro("__PIC__", Twine(PICLevel));
905 Builder.defineMacro("__pic__", Twine(PICLevel));
907 Builder.defineMacro("__PIE__", Twine(PICLevel));
908 Builder.defineMacro("__pie__", Twine(PICLevel));
912 // Macros to control C99 numerics and <float.h>
913 Builder.defineMacro("__FLT_EVAL_METHOD__", Twine(TI.getFloatEvalMethod()));
914 Builder.defineMacro("__FLT_RADIX__", "2");
915 Builder.defineMacro("__DECIMAL_DIG__", "__LDBL_DECIMAL_DIG__");
917 if (LangOpts.getStackProtector() == LangOptions::SSPOn)
918 Builder.defineMacro("__SSP__");
919 else if (LangOpts.getStackProtector() == LangOptions::SSPStrong)
920 Builder.defineMacro("__SSP_STRONG__", "2");
921 else if (LangOpts.getStackProtector() == LangOptions::SSPReq)
922 Builder.defineMacro("__SSP_ALL__", "3");
924 // Define a macro that exists only when using the static analyzer.
925 if (FEOpts.ProgramAction == frontend::RunAnalysis)
926 Builder.defineMacro("__clang_analyzer__");
928 if (LangOpts.FastRelaxedMath)
929 Builder.defineMacro("__FAST_RELAXED_MATH__");
931 if (FEOpts.ProgramAction == frontend::RewriteObjC ||
932 LangOpts.getGC() != LangOptions::NonGC) {
933 Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))");
934 Builder.defineMacro("__strong", "__attribute__((objc_gc(strong)))");
935 Builder.defineMacro("__autoreleasing", "");
936 Builder.defineMacro("__unsafe_unretained", "");
937 } else if (LangOpts.ObjC1) {
938 Builder.defineMacro("__weak", "__attribute__((objc_ownership(weak)))");
939 Builder.defineMacro("__strong", "__attribute__((objc_ownership(strong)))");
940 Builder.defineMacro("__autoreleasing",
941 "__attribute__((objc_ownership(autoreleasing)))");
942 Builder.defineMacro("__unsafe_unretained",
943 "__attribute__((objc_ownership(none)))");
946 // On Darwin, there are __double_underscored variants of the type
947 // nullability qualifiers.
948 if (TI.getTriple().isOSDarwin()) {
949 Builder.defineMacro("__nonnull", "_Nonnull");
950 Builder.defineMacro("__null_unspecified", "_Null_unspecified");
951 Builder.defineMacro("__nullable", "_Nullable");
956 // In implementations that support a preprocessor, the _OPENMP
957 // macro name is defined to have the decimal value yyyymm where
958 // yyyy and mm are the year and the month designations of the
959 // version of the OpenMP API that the implementation support.
960 switch (LangOpts.OpenMP) {
964 Builder.defineMacro("_OPENMP", "201307");
967 Builder.defineMacro("_OPENMP", "201511");
970 // Default version is OpenMP 3.1
971 Builder.defineMacro("_OPENMP", "201107");
975 // CUDA device path compilaton
976 if (LangOpts.CUDAIsDevice) {
977 // The CUDA_ARCH value is set for the GPU target specified in the NVPTX
978 // backend's target defines.
979 Builder.defineMacro("__CUDA_ARCH__");
982 // We need to communicate this to our CUDA header wrapper, which in turn
983 // informs the proper CUDA headers of this choice.
984 if (LangOpts.CUDADeviceApproxTranscendentals || LangOpts.FastMath) {
985 Builder.defineMacro("__CLANG_CUDA_APPROX_TRANSCENDENTALS__");
988 // OpenCL definitions.
989 if (LangOpts.OpenCL) {
990 #define OPENCLEXT(Ext) \
991 if (TI.getSupportedOpenCLOpts().isSupported(#Ext, \
992 LangOpts.OpenCLVersion)) \
993 Builder.defineMacro(#Ext);
994 #include "clang/Basic/OpenCLExtensions.def"
997 if (TI.hasInt128Type() && LangOpts.CPlusPlus && LangOpts.GNUMode) {
998 // For each extended integer type, g++ defines a macro mapping the
999 // index of the type (0 in this case) in some list of extended types
1001 Builder.defineMacro("__GLIBCXX_TYPE_INT_N_0", "__int128");
1002 Builder.defineMacro("__GLIBCXX_BITSIZE_INT_N_0", "128");
1005 // Get other target #defines.
1006 TI.getTargetDefines(LangOpts, Builder);
1009 /// InitializePreprocessor - Initialize the preprocessor getting it and the
1010 /// environment ready to process a single file. This returns true on error.
1012 void clang::InitializePreprocessor(
1013 Preprocessor &PP, const PreprocessorOptions &InitOpts,
1014 const PCHContainerReader &PCHContainerRdr,
1015 const FrontendOptions &FEOpts) {
1016 const LangOptions &LangOpts = PP.getLangOpts();
1017 std::string PredefineBuffer;
1018 PredefineBuffer.reserve(4080);
1019 llvm::raw_string_ostream Predefines(PredefineBuffer);
1020 MacroBuilder Builder(Predefines);
1022 // Emit line markers for various builtin sections of the file. We don't do
1023 // this in asm preprocessor mode, because "# 4" is not a line marker directive
1025 if (!PP.getLangOpts().AsmPreprocessor)
1026 Builder.append("# 1 \"<built-in>\" 3");
1028 // Install things like __POWERPC__, __GNUC__, etc into the macro table.
1029 if (InitOpts.UsePredefines) {
1030 if (LangOpts.CUDA && PP.getAuxTargetInfo())
1031 InitializePredefinedMacros(*PP.getAuxTargetInfo(), LangOpts, FEOpts,
1034 InitializePredefinedMacros(PP.getTargetInfo(), LangOpts, FEOpts, Builder);
1036 // Install definitions to make Objective-C++ ARC work well with various
1037 // C++ Standard Library implementations.
1038 if (LangOpts.ObjC1 && LangOpts.CPlusPlus &&
1039 (LangOpts.ObjCAutoRefCount || LangOpts.ObjCWeak)) {
1040 switch (InitOpts.ObjCXXARCStandardLibrary) {
1045 case ARCXX_libstdcxx:
1046 AddObjCXXARCLibstdcxxDefines(LangOpts, Builder);
1052 // Even with predefines off, some macros are still predefined.
1053 // These should all be defined in the preprocessor according to the
1054 // current language configuration.
1055 InitializeStandardPredefinedMacros(PP.getTargetInfo(), PP.getLangOpts(),
1058 // Add on the predefines from the driver. Wrap in a #line directive to report
1059 // that they come from the command line.
1060 if (!PP.getLangOpts().AsmPreprocessor)
1061 Builder.append("# 1 \"<command line>\" 1");
1063 // Process #define's and #undef's in the order they are given.
1064 for (unsigned i = 0, e = InitOpts.Macros.size(); i != e; ++i) {
1065 if (InitOpts.Macros[i].second) // isUndef
1066 Builder.undefineMacro(InitOpts.Macros[i].first);
1068 DefineBuiltinMacro(Builder, InitOpts.Macros[i].first,
1069 PP.getDiagnostics());
1072 // Exit the command line and go back to <built-in> (2 is LC_LEAVE).
1073 if (!PP.getLangOpts().AsmPreprocessor)
1074 Builder.append("# 1 \"<built-in>\" 2");
1076 // If -imacros are specified, include them now. These are processed before
1077 // any -include directives.
1078 for (unsigned i = 0, e = InitOpts.MacroIncludes.size(); i != e; ++i)
1079 AddImplicitIncludeMacros(Builder, InitOpts.MacroIncludes[i]);
1081 // Process -include-pch/-include-pth directives.
1082 if (!InitOpts.ImplicitPCHInclude.empty())
1083 AddImplicitIncludePCH(Builder, PP, PCHContainerRdr,
1084 InitOpts.ImplicitPCHInclude);
1085 if (!InitOpts.ImplicitPTHInclude.empty())
1086 AddImplicitIncludePTH(Builder, PP, InitOpts.ImplicitPTHInclude);
1088 // Process -include directives.
1089 for (unsigned i = 0, e = InitOpts.Includes.size(); i != e; ++i) {
1090 const std::string &Path = InitOpts.Includes[i];
1091 AddImplicitInclude(Builder, Path);
1094 // Instruct the preprocessor to skip the preamble.
1095 PP.setSkipMainFilePreamble(InitOpts.PrecompiledPreambleBytes.first,
1096 InitOpts.PrecompiledPreambleBytes.second);
1098 // Copy PredefinedBuffer into the Preprocessor.
1099 PP.setPredefines(Predefines.str());