InitPreprocessor.cpp source code [clang_source_code/lib/Frontend/InitPreprocessor.cpp]

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	using namespace clang;
28
29	static bool MacroBodyEndsInBackslash(StringRef MacroBody) {
30	while (!MacroBody.empty() && isWhitespace(MacroBody.back()))
31	MacroBody = MacroBody.drop_back();
32	return !MacroBody.empty() && MacroBody.back() == '\\';
33	}
34
35	// Append a #define line to Buf for Macro. Macro should be of the form XXX,
36	// in which case we emit "#define XXX 1" or "XXX=Y z W" in which case we emit
37	// "#define XXX Y z W". To get a #define with no value, use "XXX=".
38	static void DefineBuiltinMacro(MacroBuilder &Builder, StringRef Macro,
39	DiagnosticsEngine &Diags) {
40	std::pair<StringRef, StringRef> MacroPair = Macro.split('=');
41	StringRef MacroName = MacroPair.first;
42	StringRef MacroBody = MacroPair.second;
43	if (MacroName.size() != Macro.size()) {
44	// Per GCC -D semantics, the macro ends at \n if it exists.
45	StringRef::size_type End = MacroBody.find_first_of("\n\r");
46	if (End != StringRef::npos)
47	Diags.Report(diag::warn_fe_macro_contains_embedded_newline)
48	<< MacroName;
49	MacroBody = MacroBody.substr(0, End);
50	// We handle macro bodies which end in a backslash by appending an extra
51	// backslash+newline. This makes sure we don't accidentally treat the
52	// backslash as a line continuation marker.
53	if (MacroBodyEndsInBackslash(MacroBody))
54	Builder.defineMacro(MacroName, Twine(MacroBody) + "\\\n");
55	else
56	Builder.defineMacro(MacroName, MacroBody);
57	} else {
58	// Push "macroname 1".
59	Builder.defineMacro(Macro);
60	}
61	}
62
63	/// AddImplicitInclude - Add an implicit \#include of the specified file to the
64	/// predefines buffer.
65	/// As these includes are generated by -include arguments the header search
66	/// logic is going to search relatively to the current working directory.
67	static void AddImplicitInclude(MacroBuilder &Builder, StringRef File) {
68	Builder.append(Twine("#include \"") + File + "\"");
69	}
70
71	static void AddImplicitIncludeMacros(MacroBuilder &Builder, StringRef File) {
72	Builder.append(Twine("#__include_macros \"") + File + "\"");
73	// Marker token to stop the __include_macros fetch loop.
74	Builder.append("##"); // ##?
75	}
76
77	/// Add an implicit \#include using the original file used to generate
78	/// a PCH file.
79	static void AddImplicitIncludePCH(MacroBuilder &Builder, Preprocessor &PP,
80	const PCHContainerReader &PCHContainerRdr,
81	StringRef ImplicitIncludePCH) {
82	std::string OriginalFile =
83	ASTReader::getOriginalSourceFile(ImplicitIncludePCH, PP.getFileManager(),
84	PCHContainerRdr, PP.getDiagnostics());
85	if (OriginalFile.empty())
86	return;
87
88	AddImplicitInclude(Builder, OriginalFile);
89	}
90
91	/// PickFP - This is used to pick a value based on the FP semantics of the
92	/// specified FP model.
93	template <typename T>
94	static T PickFP(const llvm::fltSemantics *Sem, T IEEEHalfVal, T IEEESingleVal,
95	T IEEEDoubleVal, T X87DoubleExtendedVal, T PPCDoubleDoubleVal,
96	T IEEEQuadVal) {
97	if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEhalf())
98	return IEEEHalfVal;
99	if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEsingle())
100	return IEEESingleVal;
101	if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEdouble())
102	return IEEEDoubleVal;
103	if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::x87DoubleExtended())
104	return X87DoubleExtendedVal;
105	if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::PPCDoubleDouble())
106	return PPCDoubleDoubleVal;
107	assert(Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEquad());
108	return IEEEQuadVal;
109	}
110
111	static void DefineFloatMacros(MacroBuilder &Builder, StringRef Prefix,
112	const llvm::fltSemantics *Sem, StringRef Ext) {
113	const char DenormMin, Epsilon, Max, Min;
114	DenormMin = PickFP(Sem, "5.9604644775390625e-8", "1.40129846e-45",
115	"4.9406564584124654e-324", "3.64519953188247460253e-4951",
116	"4.94065645841246544176568792868221e-324",
117	"6.47517511943802511092443895822764655e-4966");
118	int Digits = PickFP(Sem, 3, 6, 15, 18, 31, 33);
119	int DecimalDigits = PickFP(Sem, 5, 9, 17, 21, 33, 36);
120	Epsilon = PickFP(Sem, "9.765625e-4", "1.19209290e-7",
121	"2.2204460492503131e-16", "1.08420217248550443401e-19",
122	"4.94065645841246544176568792868221e-324",
123	"1.92592994438723585305597794258492732e-34");
124	int MantissaDigits = PickFP(Sem, 11, 24, 53, 64, 106, 113);
125	int Min10Exp = PickFP(Sem, -13, -37, -307, -4931, -291, -4931);
126	int Max10Exp = PickFP(Sem, 4, 38, 308, 4932, 308, 4932);
127	int MinExp = PickFP(Sem, -14, -125, -1021, -16381, -968, -16381);
128	int MaxExp = PickFP(Sem, 15, 128, 1024, 16384, 1024, 16384);
129	Min = PickFP(Sem, "6.103515625e-5", "1.17549435e-38", "2.2250738585072014e-308",
130	"3.36210314311209350626e-4932",
131	"2.00416836000897277799610805135016e-292",
132	"3.36210314311209350626267781732175260e-4932");
133	Max = PickFP(Sem, "6.5504e+4", "3.40282347e+38", "1.7976931348623157e+308",
134	"1.18973149535723176502e+4932",
135	"1.79769313486231580793728971405301e+308",
136	"1.18973149535723176508575932662800702e+4932");
137
138	SmallString<32> DefPrefix;
139	DefPrefix = "__";
140	DefPrefix += Prefix;
141	DefPrefix += "_";
142
143	Builder.defineMacro(DefPrefix + "DENORM_MIN__", Twine(DenormMin)+Ext);
144	Builder.defineMacro(DefPrefix + "HAS_DENORM__");
145	Builder.defineMacro(DefPrefix + "DIG__", Twine(Digits));
146	Builder.defineMacro(DefPrefix + "DECIMAL_DIG__", Twine(DecimalDigits));
147	Builder.defineMacro(DefPrefix + "EPSILON__", Twine(Epsilon)+Ext);
148	Builder.defineMacro(DefPrefix + "HAS_INFINITY__");
149	Builder.defineMacro(DefPrefix + "HAS_QUIET_NAN__");
150	Builder.defineMacro(DefPrefix + "MANT_DIG__", Twine(MantissaDigits));
151
152	Builder.defineMacro(DefPrefix + "MAX_10_EXP__", Twine(Max10Exp));
153	Builder.defineMacro(DefPrefix + "MAX_EXP__", Twine(MaxExp));
154	Builder.defineMacro(DefPrefix + "MAX__", Twine(Max)+Ext);
155
156	Builder.defineMacro(DefPrefix + "MIN_10_EXP__","("+Twine(Min10Exp)+")");
157	Builder.defineMacro(DefPrefix + "MIN_EXP__", "("+Twine(MinExp)+")");
158	Builder.defineMacro(DefPrefix + "MIN__", Twine(Min)+Ext);
159	}
160
161
162	/// DefineTypeSize - Emit a macro to the predefines buffer that declares a macro
163	/// named MacroName with the max value for a type with width 'TypeWidth' a
164	/// signedness of 'isSigned' and with a value suffix of 'ValSuffix' (e.g. LL).
165	static void DefineTypeSize(const Twine &MacroName, unsigned TypeWidth,
166	StringRef ValSuffix, bool isSigned,
167	MacroBuilder &Builder) {
168	llvm::APInt MaxVal = isSigned ? llvm::APInt::getSignedMaxValue(TypeWidth)
169	: llvm::APInt::getMaxValue(TypeWidth);
170	Builder.defineMacro(MacroName, MaxVal.toString(10, isSigned) + ValSuffix);
171	}
172
173	/// DefineTypeSize - An overloaded helper that uses TargetInfo to determine
174	/// the width, suffix, and signedness of the given type
175	static void DefineTypeSize(const Twine &MacroName, TargetInfo::IntType Ty,
176	const TargetInfo &TI, MacroBuilder &Builder) {
177	DefineTypeSize(MacroName, TI.getTypeWidth(Ty), TI.getTypeConstantSuffix(Ty),
178	TI.isTypeSigned(Ty), Builder);
179	}
180
181	static void DefineFmt(const Twine &Prefix, TargetInfo::IntType Ty,
182	const TargetInfo &TI, MacroBuilder &Builder) {
183	bool IsSigned = TI.isTypeSigned(Ty);
184	StringRef FmtModifier = TI.getTypeFormatModifier(Ty);
185	for (const char Fmt = IsSigned ? "di" : "ouxX"; Fmt; ++Fmt) {
186	Builder.defineMacro(Prefix + "_FMT" + Twine(*Fmt) + "__",
187	Twine("\"") + FmtModifier + Twine(*Fmt) + "\"");
188	}
189	}
190
191	static void DefineType(const Twine &MacroName, TargetInfo::IntType Ty,
192	MacroBuilder &Builder) {
193	Builder.defineMacro(MacroName, TargetInfo::getTypeName(Ty));
194	}
195
196	static void DefineTypeWidth(StringRef MacroName, TargetInfo::IntType Ty,
197	const TargetInfo &TI, MacroBuilder &Builder) {
198	Builder.defineMacro(MacroName, Twine(TI.getTypeWidth(Ty)));
199	}
200
201	static void DefineTypeSizeof(StringRef MacroName, unsigned BitWidth,
202	const TargetInfo &TI, MacroBuilder &Builder) {
203	Builder.defineMacro(MacroName,
204	Twine(BitWidth / TI.getCharWidth()));
205	}
206
207	static void DefineExactWidthIntType(TargetInfo::IntType Ty,
208	const TargetInfo &TI,
209	MacroBuilder &Builder) {
210	int TypeWidth = TI.getTypeWidth(Ty);
211	bool IsSigned = TI.isTypeSigned(Ty);
212
213	// Use the target specified int64 type, when appropriate, so that [u]int64_t
214	// ends up being defined in terms of the correct type.
215	if (TypeWidth == 64)
216	Ty = IsSigned ? TI.getInt64Type() : TI.getUInt64Type();
217
218	const char *Prefix = IsSigned ? "__INT" : "__UINT";
219
220	DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder);
221	DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder);
222
223	StringRef ConstSuffix(TI.getTypeConstantSuffix(Ty));
224	Builder.defineMacro(Prefix + Twine(TypeWidth) + "_C_SUFFIX__", ConstSuffix);
225	}
226
227	static void DefineExactWidthIntTypeSize(TargetInfo::IntType Ty,
228	const TargetInfo &TI,
229	MacroBuilder &Builder) {
230	int TypeWidth = TI.getTypeWidth(Ty);
231	bool IsSigned = TI.isTypeSigned(Ty);
232
233	// Use the target specified int64 type, when appropriate, so that [u]int64_t
234	// ends up being defined in terms of the correct type.
235	if (TypeWidth == 64)
236	Ty = IsSigned ? TI.getInt64Type() : TI.getUInt64Type();
237
238	const char *Prefix = IsSigned ? "__INT" : "__UINT";
239	DefineTypeSize(Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder);
240	}
241
242	static void DefineLeastWidthIntType(unsigned TypeWidth, bool IsSigned,
243	const TargetInfo &TI,
244	MacroBuilder &Builder) {
245	TargetInfo::IntType Ty = TI.getLeastIntTypeByWidth(TypeWidth, IsSigned);
246	if (Ty == TargetInfo::NoInt)
247	return;
248
249	const char *Prefix = IsSigned ? "__INT_LEAST" : "__UINT_LEAST";
250	DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder);
251	DefineTypeSize(Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder);
252	DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder);
253	}
254
255	static void DefineFastIntType(unsigned TypeWidth, bool IsSigned,
256	const TargetInfo &TI, MacroBuilder &Builder) {
257	// stdint.h currently defines the fast int types as equivalent to the least
258	// types.
259	TargetInfo::IntType Ty = TI.getLeastIntTypeByWidth(TypeWidth, IsSigned);
260	if (Ty == TargetInfo::NoInt)
261	return;
262
263	const char *Prefix = IsSigned ? "__INT_FAST" : "__UINT_FAST";
264	DefineType(Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder);
265	DefineTypeSize(Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder);
266
267	DefineFmt(Prefix + Twine(TypeWidth), Ty, TI, Builder);
268	}
269
270
271	/// Get the value the ATOMIC_*_LOCK_FREE macro should have for a type with
272	/// the specified properties.
273	static const char *getLockFreeValue(unsigned TypeWidth, unsigned TypeAlign,
274	unsigned InlineWidth) {
275	// Fully-aligned, power-of-2 sizes no larger than the inline
276	// width will be inlined as lock-free operations.
277	if (TypeWidth == TypeAlign && (TypeWidth & (TypeWidth - 1)) == 0 &&
278	TypeWidth <= InlineWidth)
279	return "2"; // "always lock free"
280	// We cannot be certain what operations the lib calls might be
281	// able to implement as lock-free on future processors.
282	return "1"; // "sometimes lock free"
283	}
284
285	/// Add definitions required for a smooth interaction between
286	/// Objective-C++ automated reference counting and libstdc++ (4.2).
287	static void AddObjCXXARCLibstdcxxDefines(const LangOptions &LangOpts,
288	MacroBuilder &Builder) {
289	Builder.defineMacro("_GLIBCXX_PREDEFINED_OBJC_ARC_IS_SCALAR");
290
291	std::string Result;
292	{
293	// Provide specializations for the __is_scalar type trait so that
294	// lifetime-qualified objects are not considered "scalar" types, which
295	// libstdc++ uses as an indicator of the presence of trivial copy, assign,
296	// default-construct, and destruct semantics (none of which hold for
297	// lifetime-qualified objects in ARC).
298	llvm::raw_string_ostream Out(Result);
299
300	Out << "namespace std {\n"
301	<< "\n"
302	<< "struct __true_type;\n"
303	<< "struct __false_type;\n"
304	<< "\n";
305
306	Out << "template<typename _Tp> struct __is_scalar;\n"
307	<< "\n";
308
309	if (LangOpts.ObjCAutoRefCount) {
310	Out << "template<typename _Tp>\n"
311	<< "struct __is_scalar<__attribute__((objc_ownership(strong))) _Tp> {\n"
312	<< " enum { __value = 0 };\n"
313	<< " typedef __false_type __type;\n"
314	<< "};\n"
315	<< "\n";
316	}
317
318	if (LangOpts.ObjCWeak) {
319	Out << "template<typename _Tp>\n"
320	<< "struct __is_scalar<__attribute__((objc_ownership(weak))) _Tp> {\n"
321	<< " enum { __value = 0 };\n"
322	<< " typedef __false_type __type;\n"
323	<< "};\n"
324	<< "\n";
325	}
326
327	if (LangOpts.ObjCAutoRefCount) {
328	Out << "template<typename _Tp>\n"
329	<< "struct __is_scalar<__attribute__((objc_ownership(autoreleasing)))"
330	<< " _Tp> {\n"
331	<< " enum { __value = 0 };\n"
332	<< " typedef __false_type __type;\n"
333	<< "};\n"
334	<< "\n";
335	}
336
337	Out << "}\n";
338	}
339	Builder.append(Result);
340	}
341
342	static void InitializeStandardPredefinedMacros(const TargetInfo &TI,
343	const LangOptions &LangOpts,
344	const FrontendOptions &FEOpts,
345	MacroBuilder &Builder) {
346	if (!LangOpts.MSVCCompat && !LangOpts.TraditionalCPP)
347	Builder.defineMacro("__STDC__");
348	if (LangOpts.Freestanding)
349	Builder.defineMacro("__STDC_HOSTED__", "0");
350	else
351	Builder.defineMacro("__STDC_HOSTED__");
352
353	if (!LangOpts.CPlusPlus) {
354	if (LangOpts.C17)
355	Builder.defineMacro("__STDC_VERSION__", "201710L");
356	else if (LangOpts.C11)
357	Builder.defineMacro("__STDC_VERSION__", "201112L");
358	else if (LangOpts.C99)
359	Builder.defineMacro("__STDC_VERSION__", "199901L");
360	else if (!LangOpts.GNUMode && LangOpts.Digraphs)
361	Builder.defineMacro("__STDC_VERSION__", "199409L");
362	} else {
363	// FIXME: Use correct value for C++20.
364	if (LangOpts.CPlusPlus2a)
365	Builder.defineMacro("__cplusplus", "201707L");
366	// C++17 [cpp.predefined]p1:
367	// The name __cplusplus is defined to the value 201703L when compiling a
368	// C++ translation unit.
369	else if (LangOpts.CPlusPlus17)
370	Builder.defineMacro("__cplusplus", "201703L");
371	// C++1y [cpp.predefined]p1:
372	// The name __cplusplus is defined to the value 201402L when compiling a
373	// C++ translation unit.
374	else if (LangOpts.CPlusPlus14)
375	Builder.defineMacro("__cplusplus", "201402L");
376	// C++11 [cpp.predefined]p1:
377	// The name __cplusplus is defined to the value 201103L when compiling a
378	// C++ translation unit.
379	else if (LangOpts.CPlusPlus11)
380	Builder.defineMacro("__cplusplus", "201103L");
381	// C++03 [cpp.predefined]p1:
382	// The name __cplusplus is defined to the value 199711L when compiling a
383	// C++ translation unit.
384	else
385	Builder.defineMacro("__cplusplus", "199711L");
386
387	// C++1z [cpp.predefined]p1:
388	// An integer literal of type std::size_t whose value is the alignment
389	// guaranteed by a call to operator new(std::size_t)
390	//
391	// We provide this in all language modes, since it seems generally useful.
392	Builder.defineMacro("__STDCPP_DEFAULT_NEW_ALIGNMENT__",
393	Twine(TI.getNewAlign() / TI.getCharWidth()) +
394	TI.getTypeConstantSuffix(TI.getSizeType()));
395	}
396
397	// In C11 these are environment macros. In C++11 they are only defined
398	// as part of <cuchar>. To prevent breakage when mixing C and C++
399	// code, define these macros unconditionally. We can define them
400	// unconditionally, as Clang always uses UTF-16 and UTF-32 for 16-bit
401	// and 32-bit character literals.
402	Builder.defineMacro("__STDC_UTF_16__", "1");
403	Builder.defineMacro("__STDC_UTF_32__", "1");
404
405	if (LangOpts.ObjC)
406	Builder.defineMacro("__OBJC__");
407
408	// OpenCL v1.0/1.1 s6.9, v1.2/2.0 s6.10: Preprocessor Directives and Macros.
409	if (LangOpts.OpenCL) {
410	if (LangOpts.CPlusPlus) {
411	if (LangOpts.OpenCLCPlusPlusVersion == 100)
412	Builder.defineMacro("__OPENCL_CPP_VERSION__", "100");
413	else
414	llvm_unreachable("Unsupported OpenCL C++ version");
415	Builder.defineMacro("__CL_CPP_VERSION_1_0__", "100");
416	} else {
417	// OpenCL v1.0 and v1.1 do not have a predefined macro to indicate the
418	// language standard with which the program is compiled. __OPENCL_VERSION__
419	// is for the OpenCL version supported by the OpenCL device, which is not
420	// necessarily the language standard with which the program is compiled.
421	// A shared OpenCL header file requires a macro to indicate the language
422	// standard. As a workaround, __OPENCL_C_VERSION__ is defined for
423	// OpenCL v1.0 and v1.1.
424	switch (LangOpts.OpenCLVersion) {
425	case 100:
426	Builder.defineMacro("__OPENCL_C_VERSION__", "100");
427	break;
428	case 110:
429	Builder.defineMacro("__OPENCL_C_VERSION__", "110");
430	break;
431	case 120:
432	Builder.defineMacro("__OPENCL_C_VERSION__", "120");
433	break;
434	case 200:
435	Builder.defineMacro("__OPENCL_C_VERSION__", "200");
436	break;
437	default:
438	llvm_unreachable("Unsupported OpenCL version");
439	}
440	Builder.defineMacro("CL_VERSION_1_0", "100");
441	Builder.defineMacro("CL_VERSION_1_1", "110");
442	Builder.defineMacro("CL_VERSION_1_2", "120");
443	Builder.defineMacro("CL_VERSION_2_0", "200");
444
445	if (TI.isLittleEndian())
446	Builder.defineMacro("__ENDIAN_LITTLE__");
447
448	if (LangOpts.FastRelaxedMath)
449	Builder.defineMacro("__FAST_RELAXED_MATH__");
450	}
451	}
452	// Not "standard" per se, but available even with the -undef flag.
453	if (LangOpts.AsmPreprocessor)
454	Builder.defineMacro("__ASSEMBLER__");
455	if (LangOpts.CUDA && !LangOpts.HIP)
456	Builder.defineMacro("__CUDA__");
457	if (LangOpts.HIP) {
458	Builder.defineMacro("__HIP__");
459	Builder.defineMacro("__HIPCC__");
460	if (LangOpts.CUDAIsDevice)
461	Builder.defineMacro("__HIP_DEVICE_COMPILE__");
462	}
463	}
464
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) {
469	// C++98 features.
470	if (LangOpts.RTTI)
471	Builder.defineMacro("__cpp_rtti", "199711L");
472	if (LangOpts.CXXExceptions)
473	Builder.defineMacro("__cpp_exceptions", "199711L");
474
475	// C++11 features.
476	if (LangOpts.CPlusPlus11) {
477	Builder.defineMacro("__cpp_unicode_characters", "200704L");
478	Builder.defineMacro("__cpp_raw_strings", "200710L");
479	Builder.defineMacro("__cpp_unicode_literals", "200710L");
480	Builder.defineMacro("__cpp_user_defined_literals", "200809L");
481	Builder.defineMacro("__cpp_lambdas", "200907L");
482	Builder.defineMacro("__cpp_constexpr",
483	LangOpts.CPlusPlus17 ? "201603L" :
484	LangOpts.CPlusPlus14 ? "201304L" : "200704");
485	Builder.defineMacro("__cpp_range_based_for",
486	LangOpts.CPlusPlus17 ? "201603L" : "200907");
487	Builder.defineMacro("__cpp_static_assert",
488	LangOpts.CPlusPlus17 ? "201411L" : "200410");
489	Builder.defineMacro("__cpp_decltype", "200707L");
490	Builder.defineMacro("__cpp_attributes", "200809L");
491	Builder.defineMacro("__cpp_rvalue_references", "200610L");
492	Builder.defineMacro("__cpp_variadic_templates", "200704L");
493	Builder.defineMacro("__cpp_initializer_lists", "200806L");
494	Builder.defineMacro("__cpp_delegating_constructors", "200604L");
495	Builder.defineMacro("__cpp_nsdmi", "200809L");
496	Builder.defineMacro("__cpp_inheriting_constructors", "201511L");
497	Builder.defineMacro("__cpp_ref_qualifiers", "200710L");
498	Builder.defineMacro("__cpp_alias_templates", "200704L");
499	}
500	if (LangOpts.ThreadsafeStatics)
501	Builder.defineMacro("__cpp_threadsafe_static_init", "200806L");
502
503	// C++14 features.
504	if (LangOpts.CPlusPlus14) {
505	Builder.defineMacro("__cpp_binary_literals", "201304L");
506	Builder.defineMacro("__cpp_digit_separators", "201309L");
507	Builder.defineMacro("__cpp_init_captures", "201304L");
508	Builder.defineMacro("__cpp_generic_lambdas", "201304L");
509	Builder.defineMacro("__cpp_decltype_auto", "201304L");
510	Builder.defineMacro("__cpp_return_type_deduction", "201304L");
511	Builder.defineMacro("__cpp_aggregate_nsdmi", "201304L");
512	Builder.defineMacro("__cpp_variable_templates", "201304L");
513	}
514	if (LangOpts.SizedDeallocation)
515	Builder.defineMacro("__cpp_sized_deallocation", "201309L");
516
517	// C++17 features.
518	if (LangOpts.CPlusPlus17) {
519	Builder.defineMacro("__cpp_hex_float", "201603L");
520	Builder.defineMacro("__cpp_inline_variables", "201606L");
521	Builder.defineMacro("__cpp_noexcept_function_type", "201510L");
522	Builder.defineMacro("__cpp_capture_star_this", "201603L");
523	Builder.defineMacro("__cpp_if_constexpr", "201606L");
524	Builder.defineMacro("__cpp_deduction_guides", "201703L");
525	Builder.defineMacro("__cpp_template_auto", "201606L"); // (old name)
526	Builder.defineMacro("__cpp_namespace_attributes", "201411L");
527	Builder.defineMacro("__cpp_enumerator_attributes", "201411L");
528	Builder.defineMacro("__cpp_nested_namespace_definitions", "201411L");
529	Builder.defineMacro("__cpp_variadic_using", "201611L");
530	Builder.defineMacro("__cpp_aggregate_bases", "201603L");
531	Builder.defineMacro("__cpp_structured_bindings", "201606L");
532	Builder.defineMacro("__cpp_nontype_template_args", "201411L");
533	Builder.defineMacro("__cpp_fold_expressions", "201603L");
534	Builder.defineMacro("__cpp_guaranteed_copy_elision", "201606L");
535	Builder.defineMacro("__cpp_nontype_template_parameter_auto", "201606L");
536	}
537	if (LangOpts.AlignedAllocation && !LangOpts.AlignedAllocationUnavailable)
538	Builder.defineMacro("__cpp_aligned_new", "201606L");
539	if (LangOpts.RelaxedTemplateTemplateArgs)
540	Builder.defineMacro("__cpp_template_template_args", "201611L");
541
542	// C++20 features.
543	if (LangOpts.Char8)
544	Builder.defineMacro("__cpp_char8_t", "201811L");
545	Builder.defineMacro("__cpp_impl_destroying_delete", "201806L");
546
547	// TS features.
548	if (LangOpts.ConceptsTS)
549	Builder.defineMacro("__cpp_experimental_concepts", "1L");
550	if (LangOpts.Coroutines)
551	Builder.defineMacro("__cpp_coroutines", "201703L");
552	}
553
554	static void InitializePredefinedMacros(const TargetInfo &TI,
555	const LangOptions &LangOpts,
556	const FrontendOptions &FEOpts,
557	MacroBuilder &Builder) {
558	// Compiler version introspection macros.
559	Builder.defineMacro("__llvm__"); // LLVM Backend
560	Builder.defineMacro("__clang__"); // Clang Frontend
561	#define TOSTR2(X) #X
562	#define TOSTR(X) TOSTR2(X)
563	Builder.defineMacro("__clang_major__", TOSTR(CLANG_VERSION_MAJOR));
564	Builder.defineMacro("__clang_minor__", TOSTR(CLANG_VERSION_MINOR));
565	Builder.defineMacro("__clang_patchlevel__", TOSTR(CLANG_VERSION_PATCHLEVEL));
566	#undef TOSTR
567	#undef TOSTR2
568	Builder.defineMacro("__clang_version__",
569	"\"" CLANG_VERSION_STRING " "
570	+ getClangFullRepositoryVersion() + "\"");
571	if (!LangOpts.MSVCCompat) {
572	// Currently claim to be compatible with GCC 4.2.1-5621, but only if we're
573	// not compiling for MSVC compatibility
574	Builder.defineMacro("__GNUC_MINOR__", "2");
575	Builder.defineMacro("__GNUC_PATCHLEVEL__", "1");
576	Builder.defineMacro("__GNUC__", "4");
577	Builder.defineMacro("__GXX_ABI_VERSION", "1002");
578	}
579
580	// Define macros for the C11 / C++11 memory orderings
581	Builder.defineMacro("__ATOMIC_RELAXED", "0");
582	Builder.defineMacro("__ATOMIC_CONSUME", "1");
583	Builder.defineMacro("__ATOMIC_ACQUIRE", "2");
584	Builder.defineMacro("__ATOMIC_RELEASE", "3");
585	Builder.defineMacro("__ATOMIC_ACQ_REL", "4");
586	Builder.defineMacro("__ATOMIC_SEQ_CST", "5");
587
588	// Define macros for the OpenCL memory scope.
589	// The values should match AtomicScopeOpenCLModel::ID enum.
590	static_assert(
591	static_cast<unsigned>(AtomicScopeOpenCLModel::WorkGroup) == 1 &&
592	static_cast<unsigned>(AtomicScopeOpenCLModel::Device) == 2 &&
593	static_cast<unsigned>(AtomicScopeOpenCLModel::AllSVMDevices) == 3 &&
594	static_cast<unsigned>(AtomicScopeOpenCLModel::SubGroup) == 4,
595	"Invalid OpenCL memory scope enum definition");
596	Builder.defineMacro("__OPENCL_MEMORY_SCOPE_WORK_ITEM", "0");
597	Builder.defineMacro("__OPENCL_MEMORY_SCOPE_WORK_GROUP", "1");
598	Builder.defineMacro("__OPENCL_MEMORY_SCOPE_DEVICE", "2");
599	Builder.defineMacro("__OPENCL_MEMORY_SCOPE_ALL_SVM_DEVICES", "3");
600	Builder.defineMacro("__OPENCL_MEMORY_SCOPE_SUB_GROUP", "4");
601
602	// Support for #pragma redefine_extname (Sun compatibility)
603	Builder.defineMacro("__PRAGMA_REDEFINE_EXTNAME", "1");
604
605	// As sad as it is, enough software depends on the __VERSION__ for version
606	// checks that it is necessary to report 4.2.1 (the base GCC version we claim
607	// compatibility with) first.
608	Builder.defineMacro("__VERSION__", "\"4.2.1 Compatible " +
609	Twine(getClangFullCPPVersion()) + "\"");
610
611	// Initialize language-specific preprocessor defines.
612
613	// Standard conforming mode?
614	if (!LangOpts.GNUMode && !LangOpts.MSVCCompat)
615	Builder.defineMacro("__STRICT_ANSI__");
616
617	if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus11)
618	Builder.defineMacro("__GXX_EXPERIMENTAL_CXX0X__");
619
620	if (LangOpts.ObjC) {
621	if (LangOpts.ObjCRuntime.isNonFragile()) {
622	Builder.defineMacro("__OBJC2__");
623
624	if (LangOpts.ObjCExceptions)
625	Builder.defineMacro("OBJC_ZEROCOST_EXCEPTIONS");
626	}
627
628	if (LangOpts.getGC() != LangOptions::NonGC)
629	Builder.defineMacro("__OBJC_GC__");
630
631	if (LangOpts.ObjCRuntime.isNeXTFamily())
632	Builder.defineMacro("__NEXT_RUNTIME__");
633
634	if (LangOpts.ObjCRuntime.getKind() == ObjCRuntime::GNUstep) {
635	auto version = LangOpts.ObjCRuntime.getVersion();
636	std::string versionString = "1";
637	// Don't rely on the tuple argument, because we can be asked to target
638	// later ABIs than we actually support, so clamp these values to those
639	// currently supported
640	if (version >= VersionTuple(2, 0))
641	Builder.defineMacro("__OBJC_GNUSTEP_RUNTIME_ABI__", "20");
642	else
643	Builder.defineMacro("__OBJC_GNUSTEP_RUNTIME_ABI__",
644	"1" + Twine(std::min(8U, version.getMinor().getValueOr(0))));
645	}
646
647	if (LangOpts.ObjCRuntime.getKind() == ObjCRuntime::ObjFW) {
648	VersionTuple tuple = LangOpts.ObjCRuntime.getVersion();
649
650	unsigned minor = 0;
651	if (tuple.getMinor().hasValue())
652	minor = tuple.getMinor().getValue();
653
654	unsigned subminor = 0;
655	if (tuple.getSubminor().hasValue())
656	subminor = tuple.getSubminor().getValue();
657
658	Builder.defineMacro("__OBJFW_RUNTIME_ABI__",
659	Twine(tuple.getMajor() * 10000 + minor * 100 +
660	subminor));
661	}
662
663	Builder.defineMacro("IBOutlet", "__attribute__((iboutlet))");
664	Builder.defineMacro("IBOutletCollection(ClassName)",
665	"__attribute__((iboutletcollection(ClassName)))");
666	Builder.defineMacro("IBAction", "void)__attribute__((ibaction)");
667	Builder.defineMacro("IBInspectable", "");
668	Builder.defineMacro("IB_DESIGNABLE", "");
669	}
670
671	// Define a macro that describes the Objective-C boolean type even for C
672	// and C++ since BOOL can be used from non Objective-C code.
673	Builder.defineMacro("__OBJC_BOOL_IS_BOOL",
674	Twine(TI.useSignedCharForObjCBool() ? "0" : "1"));
675
676	if (LangOpts.CPlusPlus)
677	InitializeCPlusPlusFeatureTestMacros(LangOpts, Builder);
678
679	// darwin_constant_cfstrings controls this. This is also dependent
680	// on other things like the runtime I believe. This is set even for C code.
681	if (!LangOpts.NoConstantCFStrings)
682	Builder.defineMacro("__CONSTANT_CFSTRINGS__");
683
684	if (LangOpts.ObjC)
685	Builder.defineMacro("OBJC_NEW_PROPERTIES");
686
687	if (LangOpts.PascalStrings)
688	Builder.defineMacro("__PASCAL_STRINGS__");
689
690	if (LangOpts.Blocks) {
691	Builder.defineMacro("__block", "__attribute__((__blocks__(byref)))");
692	Builder.defineMacro("__BLOCKS__");
693	}
694
695	if (!LangOpts.MSVCCompat && LangOpts.Exceptions)
696	Builder.defineMacro("__EXCEPTIONS");
697	if (!LangOpts.MSVCCompat && LangOpts.RTTI)
698	Builder.defineMacro("__GXX_RTTI");
699
700	if (LangOpts.SjLjExceptions)
701	Builder.defineMacro("__USING_SJLJ_EXCEPTIONS__");
702	else if (LangOpts.SEHExceptions)
703	Builder.defineMacro("__SEH__");
704	else if (LangOpts.DWARFExceptions &&
705	(TI.getTriple().isThumb() \|\| TI.getTriple().isARM()))
706	Builder.defineMacro("__ARM_DWARF_EH__");
707
708	if (LangOpts.Deprecated)
709	Builder.defineMacro("__DEPRECATED");
710
711	if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus) {
712	Builder.defineMacro("__GNUG__", "4");
713	Builder.defineMacro("__GXX_WEAK__");
714	Builder.defineMacro("__private_extern__", "extern");
715	}
716
717	if (LangOpts.MicrosoftExt) {
718	if (LangOpts.WChar) {
719	// wchar_t supported as a keyword.
720	Builder.defineMacro("_WCHAR_T_DEFINED");
721	Builder.defineMacro("_NATIVE_WCHAR_T_DEFINED");
722	}
723	}
724
725	if (LangOpts.Optimize)
726	Builder.defineMacro("__OPTIMIZE__");
727	if (LangOpts.OptimizeSize)
728	Builder.defineMacro("__OPTIMIZE_SIZE__");
729
730	if (LangOpts.FastMath)
731	Builder.defineMacro("__FAST_MATH__");
732
733	// Initialize target-specific preprocessor defines.
734
735	// __BYTE_ORDER__ was added in GCC 4.6. It's analogous
736	// to the macro __BYTE_ORDER (no trailing underscores)
737	// from glibc's <endian.h> header.
738	// We don't support the PDP-11 as a target, but include
739	// the define so it can still be compared against.
740	Builder.defineMacro("__ORDER_LITTLE_ENDIAN__", "1234");
741	Builder.defineMacro("__ORDER_BIG_ENDIAN__", "4321");
742	Builder.defineMacro("__ORDER_PDP_ENDIAN__", "3412");
743	if (TI.isBigEndian()) {
744	Builder.defineMacro("__BYTE_ORDER__", "__ORDER_BIG_ENDIAN__");
745	Builder.defineMacro("__BIG_ENDIAN__");
746	} else {
747	Builder.defineMacro("__BYTE_ORDER__", "__ORDER_LITTLE_ENDIAN__");
748	Builder.defineMacro("__LITTLE_ENDIAN__");
749	}
750
751	if (TI.getPointerWidth(0) == 64 && TI.getLongWidth() == 64
752	&& TI.getIntWidth() == 32) {
753	Builder.defineMacro("_LP64");
754	Builder.defineMacro("__LP64__");
755	}
756
757	if (TI.getPointerWidth(0) == 32 && TI.getLongWidth() == 32
758	&& TI.getIntWidth() == 32) {
759	Builder.defineMacro("_ILP32");
760	Builder.defineMacro("__ILP32__");
761	}
762
763	// Define type sizing macros based on the target properties.
764	(0) . __assert_fail ("TI.getCharWidth() == 8 && \"Only support 8-bit char so far\"", "/home/seafit/code_projects/clang_source/clang/lib/Frontend/InitPreprocessor.cpp", 764, __PRETTY_FUNCTION__))" file_link="../../../include/assert.h.html#88" macro="true">assert(TI.getCharWidth() == 8 && "Only support 8-bit char so far");
765	Builder.defineMacro("__CHAR_BIT__", Twine(TI.getCharWidth()));
766
767	DefineTypeSize("__SCHAR_MAX__", TargetInfo::SignedChar, TI, Builder);
768	DefineTypeSize("__SHRT_MAX__", TargetInfo::SignedShort, TI, Builder);
769	DefineTypeSize("__INT_MAX__", TargetInfo::SignedInt, TI, Builder);
770	DefineTypeSize("__LONG_MAX__", TargetInfo::SignedLong, TI, Builder);
771	DefineTypeSize("__LONG_LONG_MAX__", TargetInfo::SignedLongLong, TI, Builder);
772	DefineTypeSize("__WCHAR_MAX__", TI.getWCharType(), TI, Builder);
773	DefineTypeSize("__WINT_MAX__", TI.getWIntType(), TI, Builder);
774	DefineTypeSize("__INTMAX_MAX__", TI.getIntMaxType(), TI, Builder);
775	DefineTypeSize("__SIZE_MAX__", TI.getSizeType(), TI, Builder);
776
777	DefineTypeSize("__UINTMAX_MAX__", TI.getUIntMaxType(), TI, Builder);
778	DefineTypeSize("__PTRDIFF_MAX__", TI.getPtrDiffType(0), TI, Builder);
779	DefineTypeSize("__INTPTR_MAX__", TI.getIntPtrType(), TI, Builder);
780	DefineTypeSize("__UINTPTR_MAX__", TI.getUIntPtrType(), TI, Builder);
781
782	DefineTypeSizeof("__SIZEOF_DOUBLE__", TI.getDoubleWidth(), TI, Builder);
783	DefineTypeSizeof("__SIZEOF_FLOAT__", TI.getFloatWidth(), TI, Builder);
784	DefineTypeSizeof("__SIZEOF_INT__", TI.getIntWidth(), TI, Builder);
785	DefineTypeSizeof("__SIZEOF_LONG__", TI.getLongWidth(), TI, Builder);
786	DefineTypeSizeof("__SIZEOF_LONG_DOUBLE__",TI.getLongDoubleWidth(),TI,Builder);
787	DefineTypeSizeof("__SIZEOF_LONG_LONG__", TI.getLongLongWidth(), TI, Builder);
788	DefineTypeSizeof("__SIZEOF_POINTER__", TI.getPointerWidth(0), TI, Builder);
789	DefineTypeSizeof("__SIZEOF_SHORT__", TI.getShortWidth(), TI, Builder);
790	DefineTypeSizeof("__SIZEOF_PTRDIFF_T__",
791	TI.getTypeWidth(TI.getPtrDiffType(0)), TI, Builder);
792	DefineTypeSizeof("__SIZEOF_SIZE_T__",
793	TI.getTypeWidth(TI.getSizeType()), TI, Builder);
794	DefineTypeSizeof("__SIZEOF_WCHAR_T__",
795	TI.getTypeWidth(TI.getWCharType()), TI, Builder);
796	DefineTypeSizeof("__SIZEOF_WINT_T__",
797	TI.getTypeWidth(TI.getWIntType()), TI, Builder);
798	if (TI.hasInt128Type())
799	DefineTypeSizeof("__SIZEOF_INT128__", 128, TI, Builder);
800
801	DefineType("__INTMAX_TYPE__", TI.getIntMaxType(), Builder);
802	DefineFmt("__INTMAX", TI.getIntMaxType(), TI, Builder);
803	Builder.defineMacro("__INTMAX_C_SUFFIX__",
804	TI.getTypeConstantSuffix(TI.getIntMaxType()));
805	DefineType("__UINTMAX_TYPE__", TI.getUIntMaxType(), Builder);
806	DefineFmt("__UINTMAX", TI.getUIntMaxType(), TI, Builder);
807	Builder.defineMacro("__UINTMAX_C_SUFFIX__",
808	TI.getTypeConstantSuffix(TI.getUIntMaxType()));
809	DefineTypeWidth("__INTMAX_WIDTH__", TI.getIntMaxType(), TI, Builder);
810	DefineType("__PTRDIFF_TYPE__", TI.getPtrDiffType(0), Builder);
811	DefineFmt("__PTRDIFF", TI.getPtrDiffType(0), TI, Builder);
812	DefineTypeWidth("__PTRDIFF_WIDTH__", TI.getPtrDiffType(0), TI, Builder);
813	DefineType("__INTPTR_TYPE__", TI.getIntPtrType(), Builder);
814	DefineFmt("__INTPTR", TI.getIntPtrType(), TI, Builder);
815	DefineTypeWidth("__INTPTR_WIDTH__", TI.getIntPtrType(), TI, Builder);
816	DefineType("__SIZE_TYPE__", TI.getSizeType(), Builder);
817	DefineFmt("__SIZE", TI.getSizeType(), TI, Builder);
818	DefineTypeWidth("__SIZE_WIDTH__", TI.getSizeType(), TI, Builder);
819	DefineType("__WCHAR_TYPE__", TI.getWCharType(), Builder);
820	DefineTypeWidth("__WCHAR_WIDTH__", TI.getWCharType(), TI, Builder);
821	DefineType("__WINT_TYPE__", TI.getWIntType(), Builder);
822	DefineTypeWidth("__WINT_WIDTH__", TI.getWIntType(), TI, Builder);
823	DefineTypeWidth("__SIG_ATOMIC_WIDTH__", TI.getSigAtomicType(), TI, Builder);
824	DefineTypeSize("__SIG_ATOMIC_MAX__", TI.getSigAtomicType(), TI, Builder);
825	DefineType("__CHAR16_TYPE__", TI.getChar16Type(), Builder);
826	DefineType("__CHAR32_TYPE__", TI.getChar32Type(), Builder);
827
828	DefineTypeWidth("__UINTMAX_WIDTH__", TI.getUIntMaxType(), TI, Builder);
829	DefineType("__UINTPTR_TYPE__", TI.getUIntPtrType(), Builder);
830	DefineFmt("__UINTPTR", TI.getUIntPtrType(), TI, Builder);
831	DefineTypeWidth("__UINTPTR_WIDTH__", TI.getUIntPtrType(), TI, Builder);
832
833	if (TI.hasFloat16Type())
834	DefineFloatMacros(Builder, "FLT16", &TI.getHalfFormat(), "F16");
835	DefineFloatMacros(Builder, "FLT", &TI.getFloatFormat(), "F");
836	DefineFloatMacros(Builder, "DBL", &TI.getDoubleFormat(), "");
837	DefineFloatMacros(Builder, "LDBL", &TI.getLongDoubleFormat(), "L");
838
839	// Define a __POINTER_WIDTH__ macro for stdint.h.
840	Builder.defineMacro("__POINTER_WIDTH__",
841	Twine((int)TI.getPointerWidth(0)));
842
843	// Define __BIGGEST_ALIGNMENT__ to be compatible with gcc.
844	Builder.defineMacro("__BIGGEST_ALIGNMENT__",
845	Twine(TI.getSuitableAlign() / TI.getCharWidth()) );
846
847	if (!LangOpts.CharIsSigned)
848	Builder.defineMacro("__CHAR_UNSIGNED__");
849
850	if (!TargetInfo::isTypeSigned(TI.getWCharType()))
851	Builder.defineMacro("__WCHAR_UNSIGNED__");
852
853	if (!TargetInfo::isTypeSigned(TI.getWIntType()))
854	Builder.defineMacro("__WINT_UNSIGNED__");
855
856	// Define exact-width integer types for stdint.h
857	DefineExactWidthIntType(TargetInfo::SignedChar, TI, Builder);
858
859	if (TI.getShortWidth() > TI.getCharWidth())
860	DefineExactWidthIntType(TargetInfo::SignedShort, TI, Builder);
861
862	if (TI.getIntWidth() > TI.getShortWidth())
863	DefineExactWidthIntType(TargetInfo::SignedInt, TI, Builder);
864
865	if (TI.getLongWidth() > TI.getIntWidth())
866	DefineExactWidthIntType(TargetInfo::SignedLong, TI, Builder);
867
868	if (TI.getLongLongWidth() > TI.getLongWidth())
869	DefineExactWidthIntType(TargetInfo::SignedLongLong, TI, Builder);
870
871	DefineExactWidthIntType(TargetInfo::UnsignedChar, TI, Builder);
872	DefineExactWidthIntTypeSize(TargetInfo::UnsignedChar, TI, Builder);
873	DefineExactWidthIntTypeSize(TargetInfo::SignedChar, TI, Builder);
874
875	if (TI.getShortWidth() > TI.getCharWidth()) {
876	DefineExactWidthIntType(TargetInfo::UnsignedShort, TI, Builder);
877	DefineExactWidthIntTypeSize(TargetInfo::UnsignedShort, TI, Builder);
878	DefineExactWidthIntTypeSize(TargetInfo::SignedShort, TI, Builder);
879	}
880
881	if (TI.getIntWidth() > TI.getShortWidth()) {
882	DefineExactWidthIntType(TargetInfo::UnsignedInt, TI, Builder);
883	DefineExactWidthIntTypeSize(TargetInfo::UnsignedInt, TI, Builder);
884	DefineExactWidthIntTypeSize(TargetInfo::SignedInt, TI, Builder);
885	}
886
887	if (TI.getLongWidth() > TI.getIntWidth()) {
888	DefineExactWidthIntType(TargetInfo::UnsignedLong, TI, Builder);
889	DefineExactWidthIntTypeSize(TargetInfo::UnsignedLong, TI, Builder);
890	DefineExactWidthIntTypeSize(TargetInfo::SignedLong, TI, Builder);
891	}
892
893	if (TI.getLongLongWidth() > TI.getLongWidth()) {
894	DefineExactWidthIntType(TargetInfo::UnsignedLongLong, TI, Builder);
895	DefineExactWidthIntTypeSize(TargetInfo::UnsignedLongLong, TI, Builder);
896	DefineExactWidthIntTypeSize(TargetInfo::SignedLongLong, TI, Builder);
897	}
898
899	DefineLeastWidthIntType(8, true, TI, Builder);
900	DefineLeastWidthIntType(8, false, TI, Builder);
901	DefineLeastWidthIntType(16, true, TI, Builder);
902	DefineLeastWidthIntType(16, false, TI, Builder);
903	DefineLeastWidthIntType(32, true, TI, Builder);
904	DefineLeastWidthIntType(32, false, TI, Builder);
905	DefineLeastWidthIntType(64, true, TI, Builder);
906	DefineLeastWidthIntType(64, false, TI, Builder);
907
908	DefineFastIntType(8, true, TI, Builder);
909	DefineFastIntType(8, false, TI, Builder);
910	DefineFastIntType(16, true, TI, Builder);
911	DefineFastIntType(16, false, TI, Builder);
912	DefineFastIntType(32, true, TI, Builder);
913	DefineFastIntType(32, false, TI, Builder);
914	DefineFastIntType(64, true, TI, Builder);
915	DefineFastIntType(64, false, TI, Builder);
916
917	char UserLabelPrefix[2] = {TI.getDataLayout().getGlobalPrefix(), 0};
918	Builder.defineMacro("__USER_LABEL_PREFIX__", UserLabelPrefix);
919
920	if (LangOpts.FastMath \|\| LangOpts.FiniteMathOnly)
921	Builder.defineMacro("__FINITE_MATH_ONLY__", "1");
922	else
923	Builder.defineMacro("__FINITE_MATH_ONLY__", "0");
924
925	if (!LangOpts.MSVCCompat) {
926	if (LangOpts.GNUInline \|\| LangOpts.CPlusPlus)
927	Builder.defineMacro("__GNUC_GNU_INLINE__");
928	else
929	Builder.defineMacro("__GNUC_STDC_INLINE__");
930
931	// The value written by __atomic_test_and_set.
932	// FIXME: This is target-dependent.
933	Builder.defineMacro("__GCC_ATOMIC_TEST_AND_SET_TRUEVAL", "1");
934	}
935
936	auto addLockFreeMacros = [&](const llvm::Twine &Prefix) {
937	// Used by libc++ and libstdc++ to implement ATOMIC_<foo>_LOCK_FREE.
938	unsigned InlineWidthBits = TI.getMaxAtomicInlineWidth();
939	#define DEFINE_LOCK_FREE_MACRO(TYPE, Type) \
940	Builder.defineMacro(Prefix + #TYPE "_LOCK_FREE", \
941	getLockFreeValue(TI.get##Type##Width(), \
942	TI.get##Type##Align(), \
943	InlineWidthBits));
944	DEFINE_LOCK_FREE_MACRO(BOOL, Bool);
945	DEFINE_LOCK_FREE_MACRO(CHAR, Char);
946	if (LangOpts.Char8)
947	DEFINE_LOCK_FREE_MACRO(CHAR8_T, Char); // Treat char8_t like char.
948	DEFINE_LOCK_FREE_MACRO(CHAR16_T, Char16);
949	DEFINE_LOCK_FREE_MACRO(CHAR32_T, Char32);
950	DEFINE_LOCK_FREE_MACRO(WCHAR_T, WChar);
951	DEFINE_LOCK_FREE_MACRO(SHORT, Short);
952	DEFINE_LOCK_FREE_MACRO(INT, Int);
953	DEFINE_LOCK_FREE_MACRO(LONG, Long);
954	DEFINE_LOCK_FREE_MACRO(LLONG, LongLong);
955	Builder.defineMacro(Prefix + "POINTER_LOCK_FREE",
956	getLockFreeValue(TI.getPointerWidth(0),
957	TI.getPointerAlign(0),
958	InlineWidthBits));
959	#undef DEFINE_LOCK_FREE_MACRO
960	};
961	addLockFreeMacros("__CLANG_ATOMIC_");
962	if (!LangOpts.MSVCCompat)
963	addLockFreeMacros("__GCC_ATOMIC_");
964
965	if (LangOpts.NoInlineDefine)
966	Builder.defineMacro("__NO_INLINE__");
967
968	if (unsigned PICLevel = LangOpts.PICLevel) {
969	Builder.defineMacro("__PIC__", Twine(PICLevel));
970	Builder.defineMacro("__pic__", Twine(PICLevel));
971	if (LangOpts.PIE) {
972	Builder.defineMacro("__PIE__", Twine(PICLevel));
973	Builder.defineMacro("__pie__", Twine(PICLevel));
974	}
975	}
976
977	// Macros to control C99 numerics and <float.h>
978	Builder.defineMacro("__FLT_EVAL_METHOD__", Twine(TI.getFloatEvalMethod()));
979	Builder.defineMacro("__FLT_RADIX__", "2");
980	Builder.defineMacro("__DECIMAL_DIG__", "__LDBL_DECIMAL_DIG__");
981
982	if (LangOpts.getStackProtector() == LangOptions::SSPOn)
983	Builder.defineMacro("__SSP__");
984	else if (LangOpts.getStackProtector() == LangOptions::SSPStrong)
985	Builder.defineMacro("__SSP_STRONG__", "2");
986	else if (LangOpts.getStackProtector() == LangOptions::SSPReq)
987	Builder.defineMacro("__SSP_ALL__", "3");
988
989	// Define a macro that exists only when using the static analyzer.
990	if (FEOpts.ProgramAction == frontend::RunAnalysis)
991	Builder.defineMacro("__clang_analyzer__");
992
993	if (LangOpts.FastRelaxedMath)
994	Builder.defineMacro("__FAST_RELAXED_MATH__");
995
996	if (FEOpts.ProgramAction == frontend::RewriteObjC \|\|
997	LangOpts.getGC() != LangOptions::NonGC) {
998	Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))");
999	Builder.defineMacro("__strong", "__attribute__((objc_gc(strong)))");
1000	Builder.defineMacro("__autoreleasing", "");
1001	Builder.defineMacro("__unsafe_unretained", "");
1002	} else if (LangOpts.ObjC) {
1003	Builder.defineMacro("__weak", "__attribute__((objc_ownership(weak)))");
1004	Builder.defineMacro("__strong", "__attribute__((objc_ownership(strong)))");
1005	Builder.defineMacro("__autoreleasing",
1006	"__attribute__((objc_ownership(autoreleasing)))");
1007	Builder.defineMacro("__unsafe_unretained",
1008	"__attribute__((objc_ownership(none)))");
1009	}
1010
1011	// On Darwin, there are __double_underscored variants of the type
1012	// nullability qualifiers.
1013	if (TI.getTriple().isOSDarwin()) {
1014	Builder.defineMacro("__nonnull", "_Nonnull");
1015	Builder.defineMacro("__null_unspecified", "_Null_unspecified");
1016	Builder.defineMacro("__nullable", "_Nullable");
1017	}
1018
1019	// Add a macro to differentiate between regular iOS/tvOS/watchOS targets and
1020	// the corresponding simulator targets.
1021	if (TI.getTriple().isOSDarwin() && TI.getTriple().isSimulatorEnvironment())
1022	Builder.defineMacro("__APPLE_EMBEDDED_SIMULATOR__", "1");
1023
1024	// OpenMP definition
1025	// OpenMP 2.2:
1026	// In implementations that support a preprocessor, the _OPENMP
1027	// macro name is defined to have the decimal value yyyymm where
1028	// yyyy and mm are the year and the month designations of the
1029	// version of the OpenMP API that the implementation support.
1030	if (!LangOpts.OpenMPSimd) {
1031	switch (LangOpts.OpenMP) {
1032	case 0:
1033	break;
1034	case 40:
1035	Builder.defineMacro("_OPENMP", "201307");
1036	break;
1037	case 45:
1038	Builder.defineMacro("_OPENMP", "201511");
1039	break;
1040	default:
1041	// Default version is OpenMP 3.1
1042	Builder.defineMacro("_OPENMP", "201107");
1043	break;
1044	}
1045	}
1046
1047	// CUDA device path compilaton
1048	if (LangOpts.CUDAIsDevice && !LangOpts.HIP) {
1049	// The CUDA_ARCH value is set for the GPU target specified in the NVPTX
1050	// backend's target defines.
1051	Builder.defineMacro("__CUDA_ARCH__");
1052	}
1053
1054	// We need to communicate this to our CUDA header wrapper, which in turn
1055	// informs the proper CUDA headers of this choice.
1056	if (LangOpts.CUDADeviceApproxTranscendentals \|\| LangOpts.FastMath) {
1057	Builder.defineMacro("__CLANG_CUDA_APPROX_TRANSCENDENTALS__");
1058	}
1059
1060	// Define a macro indicating that the source file is being compiled with a
1061	// SYCL device compiler which doesn't produce host binary.
1062	if (LangOpts.SYCLIsDevice) {
1063	Builder.defineMacro("__SYCL_DEVICE_ONLY__", "1");
1064	}
1065
1066	// OpenCL definitions.
1067	if (LangOpts.OpenCL) {
1068	#define OPENCLEXT(Ext) \
1069	if (TI.getSupportedOpenCLOpts().isSupported(#Ext, LangOpts)) \
1070	Builder.defineMacro(#Ext);
1071	#include "clang/Basic/OpenCLExtensions.def"
1072
1073	auto Arch = TI.getTriple().getArch();
1074	if (Arch == llvm::Triple::spir \|\| Arch == llvm::Triple::spir64)
1075	Builder.defineMacro("__IMAGE_SUPPORT__");
1076	}
1077
1078	if (TI.hasInt128Type() && LangOpts.CPlusPlus && LangOpts.GNUMode) {
1079	// For each extended integer type, g++ defines a macro mapping the
1080	// index of the type (0 in this case) in some list of extended types
1081	// to the type.
1082	Builder.defineMacro("__GLIBCXX_TYPE_INT_N_0", "__int128");
1083	Builder.defineMacro("__GLIBCXX_BITSIZE_INT_N_0", "128");
1084	}
1085
1086	// Get other target #defines.
1087	TI.getTargetDefines(LangOpts, Builder);
1088	}
1089
1090	/// InitializePreprocessor - Initialize the preprocessor getting it and the
1091	/// environment ready to process a single file. This returns true on error.
1092	///
1093	void clang::InitializePreprocessor(
1094	Preprocessor &PP, const PreprocessorOptions &InitOpts,
1095	const PCHContainerReader &PCHContainerRdr,
1096	const FrontendOptions &FEOpts) {
1097	const LangOptions &LangOpts = PP.getLangOpts();
1098	std::string PredefineBuffer;
1099	PredefineBuffer.reserve(4080);
1100	llvm::raw_string_ostream Predefines(PredefineBuffer);
1101	MacroBuilder Builder(Predefines);
1102
1103	// Emit line markers for various builtin sections of the file. We don't do
1104	// this in asm preprocessor mode, because "# 4" is not a line marker directive
1105	// in this mode.
1106	if (!PP.getLangOpts().AsmPreprocessor)
1107	Builder.append("# 1 \"<built-in>\" 3");
1108
1109	// Install things like __POWERPC__, __GNUC__, etc into the macro table.
1110	if (InitOpts.UsePredefines) {
1111	// FIXME: This will create multiple definitions for most of the predefined
1112	// macros. This is not the right way to handle this.
1113	if ((LangOpts.CUDA \|\| LangOpts.OpenMPIsDevice) && PP.getAuxTargetInfo())
1114	InitializePredefinedMacros(*PP.getAuxTargetInfo(), LangOpts, FEOpts,
1115	Builder);
1116
1117	InitializePredefinedMacros(PP.getTargetInfo(), LangOpts, FEOpts, Builder);
1118
1119	// Install definitions to make Objective-C++ ARC work well with various
1120	// C++ Standard Library implementations.
1121	if (LangOpts.ObjC && LangOpts.CPlusPlus &&
1122	(LangOpts.ObjCAutoRefCount \|\| LangOpts.ObjCWeak)) {
1123	switch (InitOpts.ObjCXXARCStandardLibrary) {
1124	case ARCXX_nolib:
1125	case ARCXX_libcxx:
1126	break;
1127
1128	case ARCXX_libstdcxx:
1129	AddObjCXXARCLibstdcxxDefines(LangOpts, Builder);
1130	break;
1131	}
1132	}
1133	}
1134
1135	// Even with predefines off, some macros are still predefined.
1136	// These should all be defined in the preprocessor according to the
1137	// current language configuration.
1138	InitializeStandardPredefinedMacros(PP.getTargetInfo(), PP.getLangOpts(),
1139	FEOpts, Builder);
1140
1141	// Add on the predefines from the driver. Wrap in a #line directive to report
1142	// that they come from the command line.
1143	if (!PP.getLangOpts().AsmPreprocessor)
1144	Builder.append("# 1 \"<command line>\" 1");
1145
1146	// Process #define's and #undef's in the order they are given.
1147	for (unsigned i = 0, e = InitOpts.Macros.size(); i != e; ++i) {
1148	if (InitOpts.Macros[i].second) // isUndef
1149	Builder.undefineMacro(InitOpts.Macros[i].first);
1150	else
1151	DefineBuiltinMacro(Builder, InitOpts.Macros[i].first,
1152	PP.getDiagnostics());
1153	}
1154
1155	// Exit the command line and go back to <built-in> (2 is LC_LEAVE).
1156	if (!PP.getLangOpts().AsmPreprocessor)
1157	Builder.append("# 1 \"<built-in>\" 2");
1158
1159	// If -imacros are specified, include them now. These are processed before
1160	// any -include directives.
1161	for (unsigned i = 0, e = InitOpts.MacroIncludes.size(); i != e; ++i)
1162	AddImplicitIncludeMacros(Builder, InitOpts.MacroIncludes[i]);
1163
1164	// Process -include-pch/-include-pth directives.
1165	if (!InitOpts.ImplicitPCHInclude.empty())
1166	AddImplicitIncludePCH(Builder, PP, PCHContainerRdr,
1167	InitOpts.ImplicitPCHInclude);
1168
1169	// Process -include directives.
1170	for (unsigned i = 0, e = InitOpts.Includes.size(); i != e; ++i) {
1171	const std::string &Path = InitOpts.Includes[i];
1172	AddImplicitInclude(Builder, Path);
1173	}
1174
1175	// Instruct the preprocessor to skip the preamble.
1176	PP.setSkipMainFilePreamble(InitOpts.PrecompiledPreambleBytes.first,
1177	InitOpts.PrecompiledPreambleBytes.second);
1178
1179	// Copy PredefinedBuffer into the Preprocessor.
1180	PP.setPredefines(Predefines.str());
1181	}
1182

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