1//===--- InitPreprocessor.cpp - PP initialization code. ---------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file implements the clang::InitializePreprocessor function.
10//
11//===----------------------------------------------------------------------===//
12
13#include "clang/Basic/FileManager.h"
14#include "clang/Basic/HLSLRuntime.h"
15#include "clang/Basic/MacroBuilder.h"
16#include "clang/Basic/SourceManager.h"
17#include "clang/Basic/SyncScope.h"
18#include "clang/Basic/TargetInfo.h"
19#include "clang/Basic/Version.h"
20#include "clang/Frontend/FrontendDiagnostic.h"
21#include "clang/Frontend/FrontendOptions.h"
22#include "clang/Frontend/Utils.h"
23#include "clang/Lex/HeaderSearch.h"
24#include "clang/Lex/Preprocessor.h"
25#include "clang/Lex/PreprocessorOptions.h"
26#include "clang/Serialization/ASTReader.h"
27#include "llvm/ADT/APFloat.h"
28#include "llvm/IR/DataLayout.h"
29#include "llvm/IR/DerivedTypes.h"
30using namespace clang;
31
32static bool MacroBodyEndsInBackslash(StringRef MacroBody) {
33 while (!MacroBody.empty() && isWhitespace(c: MacroBody.back()))
34 MacroBody = MacroBody.drop_back();
35 return !MacroBody.empty() && MacroBody.back() == '\\';
36}
37
38// Append a #define line to Buf for Macro. Macro should be of the form XXX,
39// in which case we emit "#define XXX 1" or "XXX=Y z W" in which case we emit
40// "#define XXX Y z W". To get a #define with no value, use "XXX=".
41static void DefineBuiltinMacro(MacroBuilder &Builder, StringRef Macro,
42 DiagnosticsEngine &Diags) {
43 std::pair<StringRef, StringRef> MacroPair = Macro.split(Separator: '=');
44 StringRef MacroName = MacroPair.first;
45 StringRef MacroBody = MacroPair.second;
46 if (MacroName.size() != Macro.size()) {
47 // Per GCC -D semantics, the macro ends at \n if it exists.
48 StringRef::size_type End = MacroBody.find_first_of(Chars: "\n\r");
49 if (End != StringRef::npos)
50 Diags.Report(DiagID: diag::warn_fe_macro_contains_embedded_newline)
51 << MacroName;
52 MacroBody = MacroBody.substr(Start: 0, N: End);
53 // We handle macro bodies which end in a backslash by appending an extra
54 // backslash+newline. This makes sure we don't accidentally treat the
55 // backslash as a line continuation marker.
56 if (MacroBodyEndsInBackslash(MacroBody))
57 Builder.defineMacro(Name: MacroName, Value: Twine(MacroBody) + "\\\n");
58 else
59 Builder.defineMacro(Name: MacroName, Value: MacroBody);
60 } else {
61 // Push "macroname 1".
62 Builder.defineMacro(Name: Macro);
63 }
64}
65
66/// AddImplicitInclude - Add an implicit \#include of the specified file to the
67/// predefines buffer.
68/// As these includes are generated by -include arguments the header search
69/// logic is going to search relatively to the current working directory.
70static void AddImplicitInclude(MacroBuilder &Builder, StringRef File) {
71 Builder.append(Str: Twine("#include \"") + File + "\"");
72}
73
74static void AddImplicitIncludeMacros(MacroBuilder &Builder, StringRef File) {
75 Builder.append(Str: Twine("#__include_macros \"") + File + "\"");
76 // Marker token to stop the __include_macros fetch loop.
77 Builder.append(Str: "##"); // ##?
78}
79
80/// Add an implicit \#include using the original file used to generate
81/// a PCH file.
82static void AddImplicitIncludePCH(MacroBuilder &Builder, Preprocessor &PP,
83 const PCHContainerReader &PCHContainerRdr,
84 StringRef ImplicitIncludePCH) {
85 std::string OriginalFile = ASTReader::getOriginalSourceFile(
86 ASTFileName: std::string(ImplicitIncludePCH), FileMgr&: PP.getFileManager(), PCHContainerRdr,
87 Diags&: PP.getDiagnostics());
88 if (OriginalFile.empty())
89 return;
90
91 AddImplicitInclude(Builder, File: OriginalFile);
92}
93
94/// PickFP - This is used to pick a value based on the FP semantics of the
95/// specified FP model.
96template <typename T>
97static T PickFP(const llvm::fltSemantics *Sem, T IEEEHalfVal, T IEEESingleVal,
98 T IEEEDoubleVal, T X87DoubleExtendedVal, T PPCDoubleDoubleVal,
99 T IEEEQuadVal) {
100 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEhalf())
101 return IEEEHalfVal;
102 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEsingle())
103 return IEEESingleVal;
104 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEdouble())
105 return IEEEDoubleVal;
106 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::x87DoubleExtended())
107 return X87DoubleExtendedVal;
108 if (Sem == (const llvm::fltSemantics*)&llvm::APFloat::PPCDoubleDouble())
109 return PPCDoubleDoubleVal;
110 assert(Sem == (const llvm::fltSemantics*)&llvm::APFloat::IEEEquad());
111 return IEEEQuadVal;
112}
113
114static void DefineFloatMacros(MacroBuilder &Builder, StringRef Prefix,
115 const llvm::fltSemantics *Sem, StringRef Ext) {
116 const char *DenormMin, *NormMax, *Epsilon, *Max, *Min;
117 NormMax = PickFP(Sem, IEEEHalfVal: "6.5504e+4", IEEESingleVal: "3.40282347e+38",
118 IEEEDoubleVal: "1.7976931348623157e+308", X87DoubleExtendedVal: "1.18973149535723176502e+4932",
119 PPCDoubleDoubleVal: "8.98846567431157953864652595394501e+307",
120 IEEEQuadVal: "1.18973149535723176508575932662800702e+4932");
121 DenormMin = PickFP(Sem, IEEEHalfVal: "5.9604644775390625e-8", IEEESingleVal: "1.40129846e-45",
122 IEEEDoubleVal: "4.9406564584124654e-324", X87DoubleExtendedVal: "3.64519953188247460253e-4951",
123 PPCDoubleDoubleVal: "4.94065645841246544176568792868221e-324",
124 IEEEQuadVal: "6.47517511943802511092443895822764655e-4966");
125 int Digits = PickFP(Sem, IEEEHalfVal: 3, IEEESingleVal: 6, IEEEDoubleVal: 15, X87DoubleExtendedVal: 18, PPCDoubleDoubleVal: 31, IEEEQuadVal: 33);
126 int DecimalDigits = PickFP(Sem, IEEEHalfVal: 5, IEEESingleVal: 9, IEEEDoubleVal: 17, X87DoubleExtendedVal: 21, PPCDoubleDoubleVal: 33, IEEEQuadVal: 36);
127 Epsilon = PickFP(Sem, IEEEHalfVal: "9.765625e-4", IEEESingleVal: "1.19209290e-7",
128 IEEEDoubleVal: "2.2204460492503131e-16", X87DoubleExtendedVal: "1.08420217248550443401e-19",
129 PPCDoubleDoubleVal: "4.94065645841246544176568792868221e-324",
130 IEEEQuadVal: "1.92592994438723585305597794258492732e-34");
131 int MantissaDigits = PickFP(Sem, IEEEHalfVal: 11, IEEESingleVal: 24, IEEEDoubleVal: 53, X87DoubleExtendedVal: 64, PPCDoubleDoubleVal: 106, IEEEQuadVal: 113);
132 int Min10Exp = PickFP(Sem, IEEEHalfVal: -4, IEEESingleVal: -37, IEEEDoubleVal: -307, X87DoubleExtendedVal: -4931, PPCDoubleDoubleVal: -291, IEEEQuadVal: -4931);
133 int Max10Exp = PickFP(Sem, IEEEHalfVal: 4, IEEESingleVal: 38, IEEEDoubleVal: 308, X87DoubleExtendedVal: 4932, PPCDoubleDoubleVal: 308, IEEEQuadVal: 4932);
134 int MinExp = PickFP(Sem, IEEEHalfVal: -13, IEEESingleVal: -125, IEEEDoubleVal: -1021, X87DoubleExtendedVal: -16381, PPCDoubleDoubleVal: -968, IEEEQuadVal: -16381);
135 int MaxExp = PickFP(Sem, IEEEHalfVal: 16, IEEESingleVal: 128, IEEEDoubleVal: 1024, X87DoubleExtendedVal: 16384, PPCDoubleDoubleVal: 1024, IEEEQuadVal: 16384);
136 Min = PickFP(Sem, IEEEHalfVal: "6.103515625e-5", IEEESingleVal: "1.17549435e-38", IEEEDoubleVal: "2.2250738585072014e-308",
137 X87DoubleExtendedVal: "3.36210314311209350626e-4932",
138 PPCDoubleDoubleVal: "2.00416836000897277799610805135016e-292",
139 IEEEQuadVal: "3.36210314311209350626267781732175260e-4932");
140 Max = PickFP(Sem, IEEEHalfVal: "6.5504e+4", IEEESingleVal: "3.40282347e+38", IEEEDoubleVal: "1.7976931348623157e+308",
141 X87DoubleExtendedVal: "1.18973149535723176502e+4932",
142 PPCDoubleDoubleVal: "1.79769313486231580793728971405301e+308",
143 IEEEQuadVal: "1.18973149535723176508575932662800702e+4932");
144
145 SmallString<32> DefPrefix;
146 DefPrefix = "__";
147 DefPrefix += Prefix;
148 DefPrefix += "_";
149
150 Builder.defineMacro(Name: DefPrefix + "DENORM_MIN__", Value: Twine(DenormMin)+Ext);
151 Builder.defineMacro(Name: DefPrefix + "NORM_MAX__", Value: Twine(NormMax)+Ext);
152 Builder.defineMacro(Name: DefPrefix + "HAS_DENORM__");
153 Builder.defineMacro(Name: DefPrefix + "DIG__", Value: Twine(Digits));
154 Builder.defineMacro(Name: DefPrefix + "DECIMAL_DIG__", Value: Twine(DecimalDigits));
155 Builder.defineMacro(Name: DefPrefix + "EPSILON__", Value: Twine(Epsilon)+Ext);
156 Builder.defineMacro(Name: DefPrefix + "HAS_INFINITY__");
157 Builder.defineMacro(Name: DefPrefix + "HAS_QUIET_NAN__");
158 Builder.defineMacro(Name: DefPrefix + "MANT_DIG__", Value: Twine(MantissaDigits));
159
160 Builder.defineMacro(Name: DefPrefix + "MAX_10_EXP__", Value: Twine(Max10Exp));
161 Builder.defineMacro(Name: DefPrefix + "MAX_EXP__", Value: Twine(MaxExp));
162 Builder.defineMacro(Name: DefPrefix + "MAX__", Value: Twine(Max)+Ext);
163
164 Builder.defineMacro(Name: DefPrefix + "MIN_10_EXP__",Value: "("+Twine(Min10Exp)+")");
165 Builder.defineMacro(Name: DefPrefix + "MIN_EXP__", Value: "("+Twine(MinExp)+")");
166 Builder.defineMacro(Name: DefPrefix + "MIN__", Value: Twine(Min)+Ext);
167}
168
169
170/// DefineTypeSize - Emit a macro to the predefines buffer that declares a macro
171/// named MacroName with the max value for a type with width 'TypeWidth' a
172/// signedness of 'isSigned' and with a value suffix of 'ValSuffix' (e.g. LL).
173static void DefineTypeSize(const Twine &MacroName, unsigned TypeWidth,
174 StringRef ValSuffix, bool isSigned,
175 MacroBuilder &Builder) {
176 llvm::APInt MaxVal = isSigned ? llvm::APInt::getSignedMaxValue(numBits: TypeWidth)
177 : llvm::APInt::getMaxValue(numBits: TypeWidth);
178 Builder.defineMacro(Name: MacroName, Value: toString(I: MaxVal, Radix: 10, Signed: isSigned) + ValSuffix);
179}
180
181/// DefineTypeSize - An overloaded helper that uses TargetInfo to determine
182/// the width, suffix, and signedness of the given type
183static void DefineTypeSize(const Twine &MacroName, TargetInfo::IntType Ty,
184 const TargetInfo &TI, MacroBuilder &Builder) {
185 DefineTypeSize(MacroName, TypeWidth: TI.getTypeWidth(T: Ty), ValSuffix: TI.getTypeConstantSuffix(T: Ty),
186 isSigned: TI.isTypeSigned(T: Ty), Builder);
187}
188
189static void DefineFmt(const LangOptions &LangOpts, const Twine &Prefix,
190 TargetInfo::IntType Ty, const TargetInfo &TI,
191 MacroBuilder &Builder) {
192 StringRef FmtModifier = TI.getTypeFormatModifier(T: Ty);
193 auto Emitter = [&](char Fmt) {
194 Builder.defineMacro(Name: Prefix + "_FMT" + Twine(Fmt) + "__",
195 Value: Twine("\"") + FmtModifier + Twine(Fmt) + "\"");
196 };
197 bool IsSigned = TI.isTypeSigned(T: Ty);
198 llvm::for_each(Range: StringRef(IsSigned ? "di" : "ouxX"), F: Emitter);
199
200 // C23 added the b and B modifiers for printing binary output of unsigned
201 // integers. Conditionally define those if compiling in C23 mode.
202 if (LangOpts.C23 && !IsSigned)
203 llvm::for_each(Range: StringRef("bB"), F: Emitter);
204}
205
206static void DefineType(const Twine &MacroName, TargetInfo::IntType Ty,
207 MacroBuilder &Builder) {
208 Builder.defineMacro(Name: MacroName, Value: TargetInfo::getTypeName(T: Ty));
209}
210
211static void DefineTypeWidth(const Twine &MacroName, TargetInfo::IntType Ty,
212 const TargetInfo &TI, MacroBuilder &Builder) {
213 Builder.defineMacro(Name: MacroName, Value: Twine(TI.getTypeWidth(T: Ty)));
214}
215
216static void DefineTypeSizeof(StringRef MacroName, unsigned BitWidth,
217 const TargetInfo &TI, MacroBuilder &Builder) {
218 Builder.defineMacro(Name: MacroName,
219 Value: Twine(BitWidth / TI.getCharWidth()));
220}
221
222// This will generate a macro based on the prefix with `_MAX__` as the suffix
223// for the max value representable for the type, and a macro with a `_WIDTH__`
224// suffix for the width of the type.
225static void DefineTypeSizeAndWidth(const Twine &Prefix, TargetInfo::IntType Ty,
226 const TargetInfo &TI,
227 MacroBuilder &Builder) {
228 DefineTypeSize(MacroName: Prefix + "_MAX__", Ty, TI, Builder);
229 DefineTypeWidth(MacroName: Prefix + "_WIDTH__", Ty, TI, Builder);
230}
231
232static void DefineExactWidthIntType(const LangOptions &LangOpts,
233 TargetInfo::IntType Ty,
234 const TargetInfo &TI,
235 MacroBuilder &Builder) {
236 int TypeWidth = TI.getTypeWidth(T: Ty);
237 bool IsSigned = TI.isTypeSigned(T: Ty);
238
239 // Use the target specified int64 type, when appropriate, so that [u]int64_t
240 // ends up being defined in terms of the correct type.
241 if (TypeWidth == 64)
242 Ty = IsSigned ? TI.getInt64Type() : TI.getUInt64Type();
243
244 // Use the target specified int16 type when appropriate. Some MCU targets
245 // (such as AVR) have definition of [u]int16_t to [un]signed int.
246 if (TypeWidth == 16)
247 Ty = IsSigned ? TI.getInt16Type() : TI.getUInt16Type();
248
249 const char *Prefix = IsSigned ? "__INT" : "__UINT";
250
251 DefineType(MacroName: Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder);
252 DefineFmt(LangOpts, Prefix: Prefix + Twine(TypeWidth), Ty, TI, Builder);
253
254 StringRef ConstSuffix(TI.getTypeConstantSuffix(T: Ty));
255 Builder.defineMacro(Name: Prefix + Twine(TypeWidth) + "_C_SUFFIX__", Value: ConstSuffix);
256}
257
258static void DefineExactWidthIntTypeSize(TargetInfo::IntType Ty,
259 const TargetInfo &TI,
260 MacroBuilder &Builder) {
261 int TypeWidth = TI.getTypeWidth(T: Ty);
262 bool IsSigned = TI.isTypeSigned(T: Ty);
263
264 // Use the target specified int64 type, when appropriate, so that [u]int64_t
265 // ends up being defined in terms of the correct type.
266 if (TypeWidth == 64)
267 Ty = IsSigned ? TI.getInt64Type() : TI.getUInt64Type();
268
269 // We don't need to define a _WIDTH macro for the exact-width types because
270 // we already know the width.
271 const char *Prefix = IsSigned ? "__INT" : "__UINT";
272 DefineTypeSize(MacroName: Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder);
273}
274
275static void DefineLeastWidthIntType(const LangOptions &LangOpts,
276 unsigned TypeWidth, bool IsSigned,
277 const TargetInfo &TI,
278 MacroBuilder &Builder) {
279 TargetInfo::IntType Ty = TI.getLeastIntTypeByWidth(BitWidth: TypeWidth, IsSigned);
280 if (Ty == TargetInfo::NoInt)
281 return;
282
283 const char *Prefix = IsSigned ? "__INT_LEAST" : "__UINT_LEAST";
284 DefineType(MacroName: Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder);
285 // We only want the *_WIDTH macro for the signed types to avoid too many
286 // predefined macros (the unsigned width and the signed width are identical.)
287 if (IsSigned)
288 DefineTypeSizeAndWidth(Prefix: Prefix + Twine(TypeWidth), Ty, TI, Builder);
289 else
290 DefineTypeSize(MacroName: Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder);
291 DefineFmt(LangOpts, Prefix: Prefix + Twine(TypeWidth), Ty, TI, Builder);
292}
293
294static void DefineFastIntType(const LangOptions &LangOpts, unsigned TypeWidth,
295 bool IsSigned, const TargetInfo &TI,
296 MacroBuilder &Builder) {
297 // stdint.h currently defines the fast int types as equivalent to the least
298 // types.
299 TargetInfo::IntType Ty = TI.getLeastIntTypeByWidth(BitWidth: TypeWidth, IsSigned);
300 if (Ty == TargetInfo::NoInt)
301 return;
302
303 const char *Prefix = IsSigned ? "__INT_FAST" : "__UINT_FAST";
304 DefineType(MacroName: Prefix + Twine(TypeWidth) + "_TYPE__", Ty, Builder);
305 // We only want the *_WIDTH macro for the signed types to avoid too many
306 // predefined macros (the unsigned width and the signed width are identical.)
307 if (IsSigned)
308 DefineTypeSizeAndWidth(Prefix: Prefix + Twine(TypeWidth), Ty, TI, Builder);
309 else
310 DefineTypeSize(MacroName: Prefix + Twine(TypeWidth) + "_MAX__", Ty, TI, Builder);
311 DefineFmt(LangOpts, Prefix: Prefix + Twine(TypeWidth), Ty, TI, Builder);
312}
313
314
315/// Get the value the ATOMIC_*_LOCK_FREE macro should have for a type with
316/// the specified properties.
317static const char *getLockFreeValue(unsigned TypeWidth, const TargetInfo &TI) {
318 // Fully-aligned, power-of-2 sizes no larger than the inline
319 // width will be inlined as lock-free operations.
320 // Note: we do not need to check alignment since _Atomic(T) is always
321 // appropriately-aligned in clang.
322 if (TI.hasBuiltinAtomic(AtomicSizeInBits: TypeWidth, AlignmentInBits: TypeWidth))
323 return "2"; // "always lock free"
324 // We cannot be certain what operations the lib calls might be
325 // able to implement as lock-free on future processors.
326 return "1"; // "sometimes lock free"
327}
328
329/// Add definitions required for a smooth interaction between
330/// Objective-C++ automated reference counting and libstdc++ (4.2).
331static void AddObjCXXARCLibstdcxxDefines(const LangOptions &LangOpts,
332 MacroBuilder &Builder) {
333 Builder.defineMacro(Name: "_GLIBCXX_PREDEFINED_OBJC_ARC_IS_SCALAR");
334
335 std::string Result;
336 {
337 // Provide specializations for the __is_scalar type trait so that
338 // lifetime-qualified objects are not considered "scalar" types, which
339 // libstdc++ uses as an indicator of the presence of trivial copy, assign,
340 // default-construct, and destruct semantics (none of which hold for
341 // lifetime-qualified objects in ARC).
342 llvm::raw_string_ostream Out(Result);
343
344 Out << "namespace std {\n"
345 << "\n"
346 << "struct __true_type;\n"
347 << "struct __false_type;\n"
348 << "\n";
349
350 Out << "template<typename _Tp> struct __is_scalar;\n"
351 << "\n";
352
353 if (LangOpts.ObjCAutoRefCount) {
354 Out << "template<typename _Tp>\n"
355 << "struct __is_scalar<__attribute__((objc_ownership(strong))) _Tp> {\n"
356 << " enum { __value = 0 };\n"
357 << " typedef __false_type __type;\n"
358 << "};\n"
359 << "\n";
360 }
361
362 if (LangOpts.ObjCWeak) {
363 Out << "template<typename _Tp>\n"
364 << "struct __is_scalar<__attribute__((objc_ownership(weak))) _Tp> {\n"
365 << " enum { __value = 0 };\n"
366 << " typedef __false_type __type;\n"
367 << "};\n"
368 << "\n";
369 }
370
371 if (LangOpts.ObjCAutoRefCount) {
372 Out << "template<typename _Tp>\n"
373 << "struct __is_scalar<__attribute__((objc_ownership(autoreleasing)))"
374 << " _Tp> {\n"
375 << " enum { __value = 0 };\n"
376 << " typedef __false_type __type;\n"
377 << "};\n"
378 << "\n";
379 }
380
381 Out << "}\n";
382 }
383 Builder.append(Str: Result);
384}
385
386static void InitializeStandardPredefinedMacros(const TargetInfo &TI,
387 const LangOptions &LangOpts,
388 const FrontendOptions &FEOpts,
389 MacroBuilder &Builder) {
390 if (LangOpts.HLSL) {
391 Builder.defineMacro(Name: "__hlsl_clang");
392 // HLSL Version
393 Builder.defineMacro(Name: "__HLSL_VERSION",
394 Value: Twine((unsigned)LangOpts.getHLSLVersion()));
395
396 if (LangOpts.NativeHalfType)
397 Builder.defineMacro(Name: "__HLSL_ENABLE_16_BIT", Value: "1");
398
399 // Shader target information
400 // "enums" for shader stages
401 Builder.defineMacro(Name: "__SHADER_STAGE_VERTEX",
402 Value: Twine((uint32_t)ShaderStage::Vertex));
403 Builder.defineMacro(Name: "__SHADER_STAGE_PIXEL",
404 Value: Twine((uint32_t)ShaderStage::Pixel));
405 Builder.defineMacro(Name: "__SHADER_STAGE_GEOMETRY",
406 Value: Twine((uint32_t)ShaderStage::Geometry));
407 Builder.defineMacro(Name: "__SHADER_STAGE_HULL",
408 Value: Twine((uint32_t)ShaderStage::Hull));
409 Builder.defineMacro(Name: "__SHADER_STAGE_DOMAIN",
410 Value: Twine((uint32_t)ShaderStage::Domain));
411 Builder.defineMacro(Name: "__SHADER_STAGE_COMPUTE",
412 Value: Twine((uint32_t)ShaderStage::Compute));
413 Builder.defineMacro(Name: "__SHADER_STAGE_AMPLIFICATION",
414 Value: Twine((uint32_t)ShaderStage::Amplification));
415 Builder.defineMacro(Name: "__SHADER_STAGE_MESH",
416 Value: Twine((uint32_t)ShaderStage::Mesh));
417 Builder.defineMacro(Name: "__SHADER_STAGE_LIBRARY",
418 Value: Twine((uint32_t)ShaderStage::Library));
419 // The current shader stage itself
420 uint32_t StageInteger = static_cast<uint32_t>(
421 hlsl::getStageFromEnvironment(E: TI.getTriple().getEnvironment()));
422
423 Builder.defineMacro(Name: "__SHADER_TARGET_STAGE", Value: Twine(StageInteger));
424 // Add target versions
425 if (TI.getTriple().getOS() == llvm::Triple::ShaderModel) {
426 VersionTuple Version = TI.getTriple().getOSVersion();
427 Builder.defineMacro(Name: "__SHADER_TARGET_MAJOR", Value: Twine(Version.getMajor()));
428 unsigned Minor = Version.getMinor().value_or(u: 0);
429 Builder.defineMacro(Name: "__SHADER_TARGET_MINOR", Value: Twine(Minor));
430 }
431 return;
432 }
433 // C++ [cpp.predefined]p1:
434 // The following macro names shall be defined by the implementation:
435
436 // -- __STDC__
437 // [C++] Whether __STDC__ is predefined and if so, what its value is,
438 // are implementation-defined.
439 // (Removed in C++20.)
440 if ((!LangOpts.MSVCCompat || LangOpts.MSVCEnableStdcMacro) &&
441 !LangOpts.TraditionalCPP)
442 Builder.defineMacro(Name: "__STDC__");
443 // -- __STDC_HOSTED__
444 // The integer literal 1 if the implementation is a hosted
445 // implementation or the integer literal 0 if it is not.
446 if (LangOpts.Freestanding)
447 Builder.defineMacro(Name: "__STDC_HOSTED__", Value: "0");
448 else
449 Builder.defineMacro(Name: "__STDC_HOSTED__");
450
451 // -- __STDC_VERSION__
452 // [C++] Whether __STDC_VERSION__ is predefined and if so, what its
453 // value is, are implementation-defined.
454 // (Removed in C++20.)
455 if (!LangOpts.CPlusPlus) {
456 if (LangOpts.C2y)
457 Builder.defineMacro(Name: "__STDC_VERSION__", Value: "202400L");
458 else if (LangOpts.C23)
459 Builder.defineMacro(Name: "__STDC_VERSION__", Value: "202311L");
460 else if (LangOpts.C17)
461 Builder.defineMacro(Name: "__STDC_VERSION__", Value: "201710L");
462 else if (LangOpts.C11)
463 Builder.defineMacro(Name: "__STDC_VERSION__", Value: "201112L");
464 else if (LangOpts.C99)
465 Builder.defineMacro(Name: "__STDC_VERSION__", Value: "199901L");
466 else if (!LangOpts.GNUMode && LangOpts.Digraphs)
467 Builder.defineMacro(Name: "__STDC_VERSION__", Value: "199409L");
468 } else {
469 // -- __cplusplus
470 if (LangOpts.CPlusPlus26)
471 // FIXME: Use correct value for C++26.
472 Builder.defineMacro(Name: "__cplusplus", Value: "202400L");
473 else if (LangOpts.CPlusPlus23)
474 Builder.defineMacro(Name: "__cplusplus", Value: "202302L");
475 // [C++20] The integer literal 202002L.
476 else if (LangOpts.CPlusPlus20)
477 Builder.defineMacro(Name: "__cplusplus", Value: "202002L");
478 // [C++17] The integer literal 201703L.
479 else if (LangOpts.CPlusPlus17)
480 Builder.defineMacro(Name: "__cplusplus", Value: "201703L");
481 // [C++14] The name __cplusplus is defined to the value 201402L when
482 // compiling a C++ translation unit.
483 else if (LangOpts.CPlusPlus14)
484 Builder.defineMacro(Name: "__cplusplus", Value: "201402L");
485 // [C++11] The name __cplusplus is defined to the value 201103L when
486 // compiling a C++ translation unit.
487 else if (LangOpts.CPlusPlus11)
488 Builder.defineMacro(Name: "__cplusplus", Value: "201103L");
489 // [C++03] The name __cplusplus is defined to the value 199711L when
490 // compiling a C++ translation unit.
491 else
492 Builder.defineMacro(Name: "__cplusplus", Value: "199711L");
493
494 // -- __STDCPP_DEFAULT_NEW_ALIGNMENT__
495 // [C++17] An integer literal of type std::size_t whose value is the
496 // alignment guaranteed by a call to operator new(std::size_t)
497 //
498 // We provide this in all language modes, since it seems generally useful.
499 Builder.defineMacro(Name: "__STDCPP_DEFAULT_NEW_ALIGNMENT__",
500 Value: Twine(TI.getNewAlign() / TI.getCharWidth()) +
501 TI.getTypeConstantSuffix(T: TI.getSizeType()));
502
503 // -- __STDCPP_­THREADS__
504 // Defined, and has the value integer literal 1, if and only if a
505 // program can have more than one thread of execution.
506 if (LangOpts.getThreadModel() == LangOptions::ThreadModelKind::POSIX)
507 Builder.defineMacro(Name: "__STDCPP_THREADS__", Value: "1");
508 }
509
510 // In C11 these are environment macros. In C++11 they are only defined
511 // as part of <cuchar>. To prevent breakage when mixing C and C++
512 // code, define these macros unconditionally. We can define them
513 // unconditionally, as Clang always uses UTF-16 and UTF-32 for 16-bit
514 // and 32-bit character literals.
515 Builder.defineMacro(Name: "__STDC_UTF_16__", Value: "1");
516 Builder.defineMacro(Name: "__STDC_UTF_32__", Value: "1");
517
518 // __has_embed definitions
519 Builder.defineMacro(Name: "__STDC_EMBED_NOT_FOUND__",
520 Value: llvm::itostr(X: static_cast<int>(EmbedResult::NotFound)));
521 Builder.defineMacro(Name: "__STDC_EMBED_FOUND__",
522 Value: llvm::itostr(X: static_cast<int>(EmbedResult::Found)));
523 Builder.defineMacro(Name: "__STDC_EMBED_EMPTY__",
524 Value: llvm::itostr(X: static_cast<int>(EmbedResult::Empty)));
525
526 if (LangOpts.ObjC)
527 Builder.defineMacro(Name: "__OBJC__");
528
529 // OpenCL v1.0/1.1 s6.9, v1.2/2.0 s6.10: Preprocessor Directives and Macros.
530 if (LangOpts.OpenCL) {
531 if (LangOpts.CPlusPlus) {
532 switch (LangOpts.OpenCLCPlusPlusVersion) {
533 case 100:
534 Builder.defineMacro(Name: "__OPENCL_CPP_VERSION__", Value: "100");
535 break;
536 case 202100:
537 Builder.defineMacro(Name: "__OPENCL_CPP_VERSION__", Value: "202100");
538 break;
539 default:
540 llvm_unreachable("Unsupported C++ version for OpenCL");
541 }
542 Builder.defineMacro(Name: "__CL_CPP_VERSION_1_0__", Value: "100");
543 Builder.defineMacro(Name: "__CL_CPP_VERSION_2021__", Value: "202100");
544 } else {
545 // OpenCL v1.0 and v1.1 do not have a predefined macro to indicate the
546 // language standard with which the program is compiled. __OPENCL_VERSION__
547 // is for the OpenCL version supported by the OpenCL device, which is not
548 // necessarily the language standard with which the program is compiled.
549 // A shared OpenCL header file requires a macro to indicate the language
550 // standard. As a workaround, __OPENCL_C_VERSION__ is defined for
551 // OpenCL v1.0 and v1.1.
552 switch (LangOpts.OpenCLVersion) {
553 case 100:
554 Builder.defineMacro(Name: "__OPENCL_C_VERSION__", Value: "100");
555 break;
556 case 110:
557 Builder.defineMacro(Name: "__OPENCL_C_VERSION__", Value: "110");
558 break;
559 case 120:
560 Builder.defineMacro(Name: "__OPENCL_C_VERSION__", Value: "120");
561 break;
562 case 200:
563 Builder.defineMacro(Name: "__OPENCL_C_VERSION__", Value: "200");
564 break;
565 case 300:
566 Builder.defineMacro(Name: "__OPENCL_C_VERSION__", Value: "300");
567 break;
568 default:
569 llvm_unreachable("Unsupported OpenCL version");
570 }
571 }
572 Builder.defineMacro(Name: "CL_VERSION_1_0", Value: "100");
573 Builder.defineMacro(Name: "CL_VERSION_1_1", Value: "110");
574 Builder.defineMacro(Name: "CL_VERSION_1_2", Value: "120");
575 Builder.defineMacro(Name: "CL_VERSION_2_0", Value: "200");
576 Builder.defineMacro(Name: "CL_VERSION_3_0", Value: "300");
577
578 if (TI.isLittleEndian())
579 Builder.defineMacro(Name: "__ENDIAN_LITTLE__");
580
581 if (LangOpts.FastRelaxedMath)
582 Builder.defineMacro(Name: "__FAST_RELAXED_MATH__");
583 }
584
585 if (LangOpts.SYCLIsDevice || LangOpts.SYCLIsHost) {
586 // SYCL Version is set to a value when building SYCL applications
587 if (LangOpts.getSYCLVersion() == LangOptions::SYCL_2017)
588 Builder.defineMacro(Name: "CL_SYCL_LANGUAGE_VERSION", Value: "121");
589 else if (LangOpts.getSYCLVersion() == LangOptions::SYCL_2020)
590 Builder.defineMacro(Name: "SYCL_LANGUAGE_VERSION", Value: "202001");
591 }
592
593 // Not "standard" per se, but available even with the -undef flag.
594 if (LangOpts.AsmPreprocessor)
595 Builder.defineMacro(Name: "__ASSEMBLER__");
596 if (LangOpts.CUDA) {
597 if (LangOpts.GPURelocatableDeviceCode)
598 Builder.defineMacro(Name: "__CLANG_RDC__");
599 if (!LangOpts.HIP)
600 Builder.defineMacro(Name: "__CUDA__");
601 if (LangOpts.GPUDefaultStream ==
602 LangOptions::GPUDefaultStreamKind::PerThread)
603 Builder.defineMacro(Name: "CUDA_API_PER_THREAD_DEFAULT_STREAM");
604 }
605 if (LangOpts.HIP) {
606 Builder.defineMacro(Name: "__HIP__");
607 Builder.defineMacro(Name: "__HIPCC__");
608 Builder.defineMacro(Name: "__HIP_MEMORY_SCOPE_SINGLETHREAD", Value: "1");
609 Builder.defineMacro(Name: "__HIP_MEMORY_SCOPE_WAVEFRONT", Value: "2");
610 Builder.defineMacro(Name: "__HIP_MEMORY_SCOPE_WORKGROUP", Value: "3");
611 Builder.defineMacro(Name: "__HIP_MEMORY_SCOPE_AGENT", Value: "4");
612 Builder.defineMacro(Name: "__HIP_MEMORY_SCOPE_SYSTEM", Value: "5");
613 if (LangOpts.HIPStdPar) {
614 Builder.defineMacro(Name: "__HIPSTDPAR__");
615 if (LangOpts.HIPStdParInterposeAlloc)
616 Builder.defineMacro(Name: "__HIPSTDPAR_INTERPOSE_ALLOC__");
617 }
618 if (LangOpts.CUDAIsDevice) {
619 Builder.defineMacro(Name: "__HIP_DEVICE_COMPILE__");
620 if (!TI.hasHIPImageSupport()) {
621 Builder.defineMacro(Name: "__HIP_NO_IMAGE_SUPPORT__", Value: "1");
622 // Deprecated.
623 Builder.defineMacro(Name: "__HIP_NO_IMAGE_SUPPORT", Value: "1");
624 }
625 }
626 if (LangOpts.GPUDefaultStream ==
627 LangOptions::GPUDefaultStreamKind::PerThread) {
628 Builder.defineMacro(Name: "__HIP_API_PER_THREAD_DEFAULT_STREAM__");
629 // Deprecated.
630 Builder.defineMacro(Name: "HIP_API_PER_THREAD_DEFAULT_STREAM");
631 }
632 }
633
634 if (LangOpts.OpenACC) {
635 // FIXME: When we have full support for OpenACC, we should set this to the
636 // version we support. Until then, set as '1' by default, but provide a
637 // temporary mechanism for users to override this so real-world examples can
638 // be tested against.
639 if (!LangOpts.OpenACCMacroOverride.empty())
640 Builder.defineMacro(Name: "_OPENACC", Value: LangOpts.OpenACCMacroOverride);
641 else
642 Builder.defineMacro(Name: "_OPENACC", Value: "1");
643 }
644}
645
646/// Initialize the predefined C++ language feature test macros defined in
647/// ISO/IEC JTC1/SC22/WG21 (C++) SD-6: "SG10 Feature Test Recommendations".
648static void InitializeCPlusPlusFeatureTestMacros(const LangOptions &LangOpts,
649 MacroBuilder &Builder) {
650 // C++98 features.
651 if (LangOpts.RTTI)
652 Builder.defineMacro(Name: "__cpp_rtti", Value: "199711L");
653 if (LangOpts.CXXExceptions)
654 Builder.defineMacro(Name: "__cpp_exceptions", Value: "199711L");
655
656 // C++11 features.
657 if (LangOpts.CPlusPlus11) {
658 Builder.defineMacro(Name: "__cpp_unicode_characters", Value: "200704L");
659 Builder.defineMacro(Name: "__cpp_raw_strings", Value: "200710L");
660 Builder.defineMacro(Name: "__cpp_unicode_literals", Value: "200710L");
661 Builder.defineMacro(Name: "__cpp_user_defined_literals", Value: "200809L");
662 Builder.defineMacro(Name: "__cpp_lambdas", Value: "200907L");
663 Builder.defineMacro(Name: "__cpp_constexpr", Value: LangOpts.CPlusPlus26 ? "202306L"
664 : LangOpts.CPlusPlus23 ? "202211L"
665 : LangOpts.CPlusPlus20 ? "201907L"
666 : LangOpts.CPlusPlus17 ? "201603L"
667 : LangOpts.CPlusPlus14 ? "201304L"
668 : "200704");
669 Builder.defineMacro(Name: "__cpp_constexpr_in_decltype", Value: "201711L");
670 Builder.defineMacro(Name: "__cpp_range_based_for",
671 Value: LangOpts.CPlusPlus23 ? "202211L"
672 : LangOpts.CPlusPlus17 ? "201603L"
673 : "200907");
674 Builder.defineMacro(Name: "__cpp_static_assert", Value: LangOpts.CPlusPlus26 ? "202306L"
675 : LangOpts.CPlusPlus17
676 ? "201411L"
677 : "200410");
678 Builder.defineMacro(Name: "__cpp_decltype", Value: "200707L");
679 Builder.defineMacro(Name: "__cpp_attributes", Value: "200809L");
680 Builder.defineMacro(Name: "__cpp_rvalue_references", Value: "200610L");
681 Builder.defineMacro(Name: "__cpp_variadic_templates", Value: "200704L");
682 Builder.defineMacro(Name: "__cpp_initializer_lists", Value: "200806L");
683 Builder.defineMacro(Name: "__cpp_delegating_constructors", Value: "200604L");
684 Builder.defineMacro(Name: "__cpp_nsdmi", Value: "200809L");
685 Builder.defineMacro(Name: "__cpp_inheriting_constructors", Value: "201511L");
686 Builder.defineMacro(Name: "__cpp_ref_qualifiers", Value: "200710L");
687 Builder.defineMacro(Name: "__cpp_alias_templates", Value: "200704L");
688 }
689 if (LangOpts.ThreadsafeStatics)
690 Builder.defineMacro(Name: "__cpp_threadsafe_static_init", Value: "200806L");
691
692 // C++14 features.
693 if (LangOpts.CPlusPlus14) {
694 Builder.defineMacro(Name: "__cpp_binary_literals", Value: "201304L");
695 Builder.defineMacro(Name: "__cpp_digit_separators", Value: "201309L");
696 Builder.defineMacro(Name: "__cpp_init_captures",
697 Value: LangOpts.CPlusPlus20 ? "201803L" : "201304L");
698 Builder.defineMacro(Name: "__cpp_generic_lambdas",
699 Value: LangOpts.CPlusPlus20 ? "201707L" : "201304L");
700 Builder.defineMacro(Name: "__cpp_decltype_auto", Value: "201304L");
701 Builder.defineMacro(Name: "__cpp_return_type_deduction", Value: "201304L");
702 Builder.defineMacro(Name: "__cpp_aggregate_nsdmi", Value: "201304L");
703 Builder.defineMacro(Name: "__cpp_variable_templates", Value: "201304L");
704 }
705 if (LangOpts.SizedDeallocation)
706 Builder.defineMacro(Name: "__cpp_sized_deallocation", Value: "201309L");
707
708 // C++17 features.
709 if (LangOpts.CPlusPlus17) {
710 Builder.defineMacro(Name: "__cpp_hex_float", Value: "201603L");
711 Builder.defineMacro(Name: "__cpp_inline_variables", Value: "201606L");
712 Builder.defineMacro(Name: "__cpp_noexcept_function_type", Value: "201510L");
713 Builder.defineMacro(Name: "__cpp_capture_star_this", Value: "201603L");
714 Builder.defineMacro(Name: "__cpp_if_constexpr", Value: "201606L");
715 Builder.defineMacro(Name: "__cpp_deduction_guides", Value: "201703L"); // (not latest)
716 Builder.defineMacro(Name: "__cpp_template_auto", Value: "201606L"); // (old name)
717 Builder.defineMacro(Name: "__cpp_namespace_attributes", Value: "201411L");
718 Builder.defineMacro(Name: "__cpp_enumerator_attributes", Value: "201411L");
719 Builder.defineMacro(Name: "__cpp_nested_namespace_definitions", Value: "201411L");
720 Builder.defineMacro(Name: "__cpp_variadic_using", Value: "201611L");
721 Builder.defineMacro(Name: "__cpp_aggregate_bases", Value: "201603L");
722 Builder.defineMacro(Name: "__cpp_structured_bindings", Value: "202403L");
723 Builder.defineMacro(Name: "__cpp_nontype_template_args",
724 Value: "201411L"); // (not latest)
725 Builder.defineMacro(Name: "__cpp_fold_expressions", Value: "201603L");
726 Builder.defineMacro(Name: "__cpp_guaranteed_copy_elision", Value: "201606L");
727 Builder.defineMacro(Name: "__cpp_nontype_template_parameter_auto", Value: "201606L");
728 }
729 if (LangOpts.AlignedAllocation && !LangOpts.AlignedAllocationUnavailable)
730 Builder.defineMacro(Name: "__cpp_aligned_new", Value: "201606L");
731 if (LangOpts.RelaxedTemplateTemplateArgs)
732 Builder.defineMacro(Name: "__cpp_template_template_args", Value: "201611L");
733
734 // C++20 features.
735 if (LangOpts.CPlusPlus20) {
736 Builder.defineMacro(Name: "__cpp_aggregate_paren_init", Value: "201902L");
737
738 Builder.defineMacro(Name: "__cpp_concepts", Value: "202002");
739 Builder.defineMacro(Name: "__cpp_conditional_explicit", Value: "201806L");
740 Builder.defineMacro(Name: "__cpp_consteval", Value: "202211L");
741 Builder.defineMacro(Name: "__cpp_constexpr_dynamic_alloc", Value: "201907L");
742 Builder.defineMacro(Name: "__cpp_constinit", Value: "201907L");
743 Builder.defineMacro(Name: "__cpp_impl_coroutine", Value: "201902L");
744 Builder.defineMacro(Name: "__cpp_designated_initializers", Value: "201707L");
745 Builder.defineMacro(Name: "__cpp_impl_three_way_comparison", Value: "201907L");
746 //Builder.defineMacro("__cpp_modules", "201907L");
747 Builder.defineMacro(Name: "__cpp_using_enum", Value: "201907L");
748 }
749 // C++23 features.
750 if (LangOpts.CPlusPlus23) {
751 Builder.defineMacro(Name: "__cpp_implicit_move", Value: "202207L");
752 Builder.defineMacro(Name: "__cpp_size_t_suffix", Value: "202011L");
753 Builder.defineMacro(Name: "__cpp_if_consteval", Value: "202106L");
754 Builder.defineMacro(Name: "__cpp_multidimensional_subscript", Value: "202211L");
755 Builder.defineMacro(Name: "__cpp_auto_cast", Value: "202110L");
756 }
757
758 // We provide those C++23 features as extensions in earlier language modes, so
759 // we also define their feature test macros.
760 if (LangOpts.CPlusPlus11)
761 Builder.defineMacro(Name: "__cpp_static_call_operator", Value: "202207L");
762 Builder.defineMacro(Name: "__cpp_named_character_escapes", Value: "202207L");
763 Builder.defineMacro(Name: "__cpp_placeholder_variables", Value: "202306L");
764
765 // C++26 features supported in earlier language modes.
766 Builder.defineMacro(Name: "__cpp_pack_indexing", Value: "202311L");
767 Builder.defineMacro(Name: "__cpp_deleted_function", Value: "202403L");
768
769 if (LangOpts.Char8)
770 Builder.defineMacro(Name: "__cpp_char8_t", Value: "202207L");
771 Builder.defineMacro(Name: "__cpp_impl_destroying_delete", Value: "201806L");
772}
773
774/// InitializeOpenCLFeatureTestMacros - Define OpenCL macros based on target
775/// settings and language version
776void InitializeOpenCLFeatureTestMacros(const TargetInfo &TI,
777 const LangOptions &Opts,
778 MacroBuilder &Builder) {
779 const llvm::StringMap<bool> &OpenCLFeaturesMap = TI.getSupportedOpenCLOpts();
780 // FIXME: OpenCL options which affect language semantics/syntax
781 // should be moved into LangOptions.
782 auto defineOpenCLExtMacro = [&](llvm::StringRef Name, auto... OptArgs) {
783 // Check if extension is supported by target and is available in this
784 // OpenCL version
785 if (TI.hasFeatureEnabled(Features: OpenCLFeaturesMap, Name) &&
786 OpenCLOptions::isOpenCLOptionAvailableIn(Opts, OptArgs...))
787 Builder.defineMacro(Name);
788 };
789#define OPENCL_GENERIC_EXTENSION(Ext, ...) \
790 defineOpenCLExtMacro(#Ext, __VA_ARGS__);
791#include "clang/Basic/OpenCLExtensions.def"
792
793 // Assume compiling for FULL profile
794 Builder.defineMacro(Name: "__opencl_c_int64");
795}
796
797llvm::SmallString<32> ConstructFixedPointLiteral(llvm::APFixedPoint Val,
798 llvm::StringRef Suffix) {
799 if (Val.isSigned() && Val == llvm::APFixedPoint::getMin(Sema: Val.getSemantics())) {
800 // When representing the min value of a signed fixed point type in source
801 // code, we cannot simply write `-<lowest value>`. For example, the min
802 // value of a `short _Fract` cannot be written as `-1.0hr`. This is because
803 // the parser will read this (and really any negative numerical literal) as
804 // a UnaryOperator that owns a FixedPointLiteral with a positive value
805 // rather than just a FixedPointLiteral with a negative value. Compiling
806 // `-1.0hr` results in an overflow to the maximal value of that fixed point
807 // type. The correct way to represent a signed min value is to instead split
808 // it into two halves, like `(-0.5hr-0.5hr)` which is what the standard
809 // defines SFRACT_MIN as.
810 llvm::SmallString<32> Literal;
811 Literal.push_back(Elt: '(');
812 llvm::SmallString<32> HalfStr =
813 ConstructFixedPointLiteral(Val: Val.shr(Amt: 1), Suffix);
814 Literal += HalfStr;
815 Literal += HalfStr;
816 Literal.push_back(Elt: ')');
817 return Literal;
818 }
819
820 llvm::SmallString<32> Str(Val.toString());
821 Str += Suffix;
822 return Str;
823}
824
825void DefineFixedPointMacros(const TargetInfo &TI, MacroBuilder &Builder,
826 llvm::StringRef TypeName, llvm::StringRef Suffix,
827 unsigned Width, unsigned Scale, bool Signed) {
828 // Saturation doesn't affect the size or scale of a fixed point type, so we
829 // don't need it here.
830 llvm::FixedPointSemantics FXSema(
831 Width, Scale, Signed, /*IsSaturated=*/false,
832 !Signed && TI.doUnsignedFixedPointTypesHavePadding());
833 llvm::SmallString<32> MacroPrefix("__");
834 MacroPrefix += TypeName;
835 Builder.defineMacro(Name: MacroPrefix + "_EPSILON__",
836 Value: ConstructFixedPointLiteral(
837 Val: llvm::APFixedPoint::getEpsilon(Sema: FXSema), Suffix));
838 Builder.defineMacro(Name: MacroPrefix + "_FBIT__", Value: Twine(Scale));
839 Builder.defineMacro(
840 Name: MacroPrefix + "_MAX__",
841 Value: ConstructFixedPointLiteral(Val: llvm::APFixedPoint::getMax(Sema: FXSema), Suffix));
842
843 // ISO/IEC TR 18037:2008 doesn't specify MIN macros for unsigned types since
844 // they're all just zero.
845 if (Signed)
846 Builder.defineMacro(
847 Name: MacroPrefix + "_MIN__",
848 Value: ConstructFixedPointLiteral(Val: llvm::APFixedPoint::getMin(Sema: FXSema), Suffix));
849}
850
851static void InitializePredefinedMacros(const TargetInfo &TI,
852 const LangOptions &LangOpts,
853 const FrontendOptions &FEOpts,
854 const PreprocessorOptions &PPOpts,
855 MacroBuilder &Builder) {
856 // Compiler version introspection macros.
857 Builder.defineMacro(Name: "__llvm__"); // LLVM Backend
858 Builder.defineMacro(Name: "__clang__"); // Clang Frontend
859#define TOSTR2(X) #X
860#define TOSTR(X) TOSTR2(X)
861 Builder.defineMacro(Name: "__clang_major__", TOSTR(CLANG_VERSION_MAJOR));
862 Builder.defineMacro(Name: "__clang_minor__", TOSTR(CLANG_VERSION_MINOR));
863 Builder.defineMacro(Name: "__clang_patchlevel__", TOSTR(CLANG_VERSION_PATCHLEVEL));
864#undef TOSTR
865#undef TOSTR2
866 Builder.defineMacro(Name: "__clang_version__",
867 Value: "\"" CLANG_VERSION_STRING " "
868 + getClangFullRepositoryVersion() + "\"");
869
870 if (LangOpts.GNUCVersion != 0) {
871 // Major, minor, patch, are given two decimal places each, so 4.2.1 becomes
872 // 40201.
873 unsigned GNUCMajor = LangOpts.GNUCVersion / 100 / 100;
874 unsigned GNUCMinor = LangOpts.GNUCVersion / 100 % 100;
875 unsigned GNUCPatch = LangOpts.GNUCVersion % 100;
876 Builder.defineMacro(Name: "__GNUC__", Value: Twine(GNUCMajor));
877 Builder.defineMacro(Name: "__GNUC_MINOR__", Value: Twine(GNUCMinor));
878 Builder.defineMacro(Name: "__GNUC_PATCHLEVEL__", Value: Twine(GNUCPatch));
879 Builder.defineMacro(Name: "__GXX_ABI_VERSION", Value: "1002");
880
881 if (LangOpts.CPlusPlus) {
882 Builder.defineMacro(Name: "__GNUG__", Value: Twine(GNUCMajor));
883 Builder.defineMacro(Name: "__GXX_WEAK__");
884 }
885 }
886
887 // Define macros for the C11 / C++11 memory orderings
888 Builder.defineMacro(Name: "__ATOMIC_RELAXED", Value: "0");
889 Builder.defineMacro(Name: "__ATOMIC_CONSUME", Value: "1");
890 Builder.defineMacro(Name: "__ATOMIC_ACQUIRE", Value: "2");
891 Builder.defineMacro(Name: "__ATOMIC_RELEASE", Value: "3");
892 Builder.defineMacro(Name: "__ATOMIC_ACQ_REL", Value: "4");
893 Builder.defineMacro(Name: "__ATOMIC_SEQ_CST", Value: "5");
894
895 // Define macros for the clang atomic scopes.
896 Builder.defineMacro(Name: "__MEMORY_SCOPE_SYSTEM", Value: "0");
897 Builder.defineMacro(Name: "__MEMORY_SCOPE_DEVICE", Value: "1");
898 Builder.defineMacro(Name: "__MEMORY_SCOPE_WRKGRP", Value: "2");
899 Builder.defineMacro(Name: "__MEMORY_SCOPE_WVFRNT", Value: "3");
900 Builder.defineMacro(Name: "__MEMORY_SCOPE_SINGLE", Value: "4");
901
902 // Define macros for the OpenCL memory scope.
903 // The values should match AtomicScopeOpenCLModel::ID enum.
904 static_assert(
905 static_cast<unsigned>(AtomicScopeOpenCLModel::WorkGroup) == 1 &&
906 static_cast<unsigned>(AtomicScopeOpenCLModel::Device) == 2 &&
907 static_cast<unsigned>(AtomicScopeOpenCLModel::AllSVMDevices) == 3 &&
908 static_cast<unsigned>(AtomicScopeOpenCLModel::SubGroup) == 4,
909 "Invalid OpenCL memory scope enum definition");
910 Builder.defineMacro(Name: "__OPENCL_MEMORY_SCOPE_WORK_ITEM", Value: "0");
911 Builder.defineMacro(Name: "__OPENCL_MEMORY_SCOPE_WORK_GROUP", Value: "1");
912 Builder.defineMacro(Name: "__OPENCL_MEMORY_SCOPE_DEVICE", Value: "2");
913 Builder.defineMacro(Name: "__OPENCL_MEMORY_SCOPE_ALL_SVM_DEVICES", Value: "3");
914 Builder.defineMacro(Name: "__OPENCL_MEMORY_SCOPE_SUB_GROUP", Value: "4");
915
916 // Define macros for floating-point data classes, used in __builtin_isfpclass.
917 Builder.defineMacro(Name: "__FPCLASS_SNAN", Value: "0x0001");
918 Builder.defineMacro(Name: "__FPCLASS_QNAN", Value: "0x0002");
919 Builder.defineMacro(Name: "__FPCLASS_NEGINF", Value: "0x0004");
920 Builder.defineMacro(Name: "__FPCLASS_NEGNORMAL", Value: "0x0008");
921 Builder.defineMacro(Name: "__FPCLASS_NEGSUBNORMAL", Value: "0x0010");
922 Builder.defineMacro(Name: "__FPCLASS_NEGZERO", Value: "0x0020");
923 Builder.defineMacro(Name: "__FPCLASS_POSZERO", Value: "0x0040");
924 Builder.defineMacro(Name: "__FPCLASS_POSSUBNORMAL", Value: "0x0080");
925 Builder.defineMacro(Name: "__FPCLASS_POSNORMAL", Value: "0x0100");
926 Builder.defineMacro(Name: "__FPCLASS_POSINF", Value: "0x0200");
927
928 // Support for #pragma redefine_extname (Sun compatibility)
929 Builder.defineMacro(Name: "__PRAGMA_REDEFINE_EXTNAME", Value: "1");
930
931 // Previously this macro was set to a string aiming to achieve compatibility
932 // with GCC 4.2.1. Now, just return the full Clang version
933 Builder.defineMacro(Name: "__VERSION__", Value: "\"" +
934 Twine(getClangFullCPPVersion()) + "\"");
935
936 // Initialize language-specific preprocessor defines.
937
938 // Standard conforming mode?
939 if (!LangOpts.GNUMode && !LangOpts.MSVCCompat)
940 Builder.defineMacro(Name: "__STRICT_ANSI__");
941
942 if (LangOpts.GNUCVersion && LangOpts.CPlusPlus11)
943 Builder.defineMacro(Name: "__GXX_EXPERIMENTAL_CXX0X__");
944
945 if (TI.getTriple().isWindowsGNUEnvironment()) {
946 // Set ABI defining macros for libstdc++ for MinGW, where the
947 // default in libstdc++ differs from the defaults for this target.
948 Builder.defineMacro(Name: "__GXX_TYPEINFO_EQUALITY_INLINE", Value: "0");
949 }
950
951 if (LangOpts.ObjC) {
952 if (LangOpts.ObjCRuntime.isNonFragile()) {
953 Builder.defineMacro(Name: "__OBJC2__");
954
955 if (LangOpts.ObjCExceptions)
956 Builder.defineMacro(Name: "OBJC_ZEROCOST_EXCEPTIONS");
957 }
958
959 if (LangOpts.getGC() != LangOptions::NonGC)
960 Builder.defineMacro(Name: "__OBJC_GC__");
961
962 if (LangOpts.ObjCRuntime.isNeXTFamily())
963 Builder.defineMacro(Name: "__NEXT_RUNTIME__");
964
965 if (LangOpts.ObjCRuntime.getKind() == ObjCRuntime::GNUstep) {
966 auto version = LangOpts.ObjCRuntime.getVersion();
967 std::string versionString = "1";
968 // Don't rely on the tuple argument, because we can be asked to target
969 // later ABIs than we actually support, so clamp these values to those
970 // currently supported
971 if (version >= VersionTuple(2, 0))
972 Builder.defineMacro(Name: "__OBJC_GNUSTEP_RUNTIME_ABI__", Value: "20");
973 else
974 Builder.defineMacro(
975 Name: "__OBJC_GNUSTEP_RUNTIME_ABI__",
976 Value: "1" + Twine(std::min(a: 8U, b: version.getMinor().value_or(u: 0))));
977 }
978
979 if (LangOpts.ObjCRuntime.getKind() == ObjCRuntime::ObjFW) {
980 VersionTuple tuple = LangOpts.ObjCRuntime.getVersion();
981 unsigned minor = tuple.getMinor().value_or(u: 0);
982 unsigned subminor = tuple.getSubminor().value_or(u: 0);
983 Builder.defineMacro(Name: "__OBJFW_RUNTIME_ABI__",
984 Value: Twine(tuple.getMajor() * 10000 + minor * 100 +
985 subminor));
986 }
987
988 Builder.defineMacro(Name: "IBOutlet", Value: "__attribute__((iboutlet))");
989 Builder.defineMacro(Name: "IBOutletCollection(ClassName)",
990 Value: "__attribute__((iboutletcollection(ClassName)))");
991 Builder.defineMacro(Name: "IBAction", Value: "void)__attribute__((ibaction)");
992 Builder.defineMacro(Name: "IBInspectable", Value: "");
993 Builder.defineMacro(Name: "IB_DESIGNABLE", Value: "");
994 }
995
996 // Define a macro that describes the Objective-C boolean type even for C
997 // and C++ since BOOL can be used from non Objective-C code.
998 Builder.defineMacro(Name: "__OBJC_BOOL_IS_BOOL",
999 Value: Twine(TI.useSignedCharForObjCBool() ? "0" : "1"));
1000
1001 if (LangOpts.CPlusPlus)
1002 InitializeCPlusPlusFeatureTestMacros(LangOpts, Builder);
1003
1004 // darwin_constant_cfstrings controls this. This is also dependent
1005 // on other things like the runtime I believe. This is set even for C code.
1006 if (!LangOpts.NoConstantCFStrings)
1007 Builder.defineMacro(Name: "__CONSTANT_CFSTRINGS__");
1008
1009 if (LangOpts.ObjC)
1010 Builder.defineMacro(Name: "OBJC_NEW_PROPERTIES");
1011
1012 if (LangOpts.PascalStrings)
1013 Builder.defineMacro(Name: "__PASCAL_STRINGS__");
1014
1015 if (LangOpts.Blocks) {
1016 Builder.defineMacro(Name: "__block", Value: "__attribute__((__blocks__(byref)))");
1017 Builder.defineMacro(Name: "__BLOCKS__");
1018 }
1019
1020 if (!LangOpts.MSVCCompat && LangOpts.Exceptions)
1021 Builder.defineMacro(Name: "__EXCEPTIONS");
1022 if (LangOpts.GNUCVersion && LangOpts.RTTI)
1023 Builder.defineMacro(Name: "__GXX_RTTI");
1024
1025 if (LangOpts.hasSjLjExceptions())
1026 Builder.defineMacro(Name: "__USING_SJLJ_EXCEPTIONS__");
1027 else if (LangOpts.hasSEHExceptions())
1028 Builder.defineMacro(Name: "__SEH__");
1029 else if (LangOpts.hasDWARFExceptions() &&
1030 (TI.getTriple().isThumb() || TI.getTriple().isARM()))
1031 Builder.defineMacro(Name: "__ARM_DWARF_EH__");
1032 else if (LangOpts.hasWasmExceptions() && TI.getTriple().isWasm())
1033 Builder.defineMacro(Name: "__WASM_EXCEPTIONS__");
1034
1035 if (LangOpts.Deprecated)
1036 Builder.defineMacro(Name: "__DEPRECATED");
1037
1038 if (!LangOpts.MSVCCompat && LangOpts.CPlusPlus)
1039 Builder.defineMacro(Name: "__private_extern__", Value: "extern");
1040
1041 if (LangOpts.MicrosoftExt) {
1042 if (LangOpts.WChar) {
1043 // wchar_t supported as a keyword.
1044 Builder.defineMacro(Name: "_WCHAR_T_DEFINED");
1045 Builder.defineMacro(Name: "_NATIVE_WCHAR_T_DEFINED");
1046 }
1047 }
1048
1049 // Macros to help identify the narrow and wide character sets
1050 // FIXME: clang currently ignores -fexec-charset=. If this changes,
1051 // then this may need to be updated.
1052 Builder.defineMacro(Name: "__clang_literal_encoding__", Value: "\"UTF-8\"");
1053 if (TI.getTypeWidth(T: TI.getWCharType()) >= 32) {
1054 // FIXME: 32-bit wchar_t signals UTF-32. This may change
1055 // if -fwide-exec-charset= is ever supported.
1056 Builder.defineMacro(Name: "__clang_wide_literal_encoding__", Value: "\"UTF-32\"");
1057 } else {
1058 // FIXME: Less-than 32-bit wchar_t generally means UTF-16
1059 // (e.g., Windows, 32-bit IBM). This may need to be
1060 // updated if -fwide-exec-charset= is ever supported.
1061 Builder.defineMacro(Name: "__clang_wide_literal_encoding__", Value: "\"UTF-16\"");
1062 }
1063
1064 if (LangOpts.Optimize)
1065 Builder.defineMacro(Name: "__OPTIMIZE__");
1066 if (LangOpts.OptimizeSize)
1067 Builder.defineMacro(Name: "__OPTIMIZE_SIZE__");
1068
1069 if (LangOpts.FastMath)
1070 Builder.defineMacro(Name: "__FAST_MATH__");
1071
1072 // Initialize target-specific preprocessor defines.
1073
1074 // __BYTE_ORDER__ was added in GCC 4.6. It's analogous
1075 // to the macro __BYTE_ORDER (no trailing underscores)
1076 // from glibc's <endian.h> header.
1077 // We don't support the PDP-11 as a target, but include
1078 // the define so it can still be compared against.
1079 Builder.defineMacro(Name: "__ORDER_LITTLE_ENDIAN__", Value: "1234");
1080 Builder.defineMacro(Name: "__ORDER_BIG_ENDIAN__", Value: "4321");
1081 Builder.defineMacro(Name: "__ORDER_PDP_ENDIAN__", Value: "3412");
1082 if (TI.isBigEndian()) {
1083 Builder.defineMacro(Name: "__BYTE_ORDER__", Value: "__ORDER_BIG_ENDIAN__");
1084 Builder.defineMacro(Name: "__BIG_ENDIAN__");
1085 } else {
1086 Builder.defineMacro(Name: "__BYTE_ORDER__", Value: "__ORDER_LITTLE_ENDIAN__");
1087 Builder.defineMacro(Name: "__LITTLE_ENDIAN__");
1088 }
1089
1090 if (TI.getPointerWidth(AddrSpace: LangAS::Default) == 64 && TI.getLongWidth() == 64 &&
1091 TI.getIntWidth() == 32) {
1092 Builder.defineMacro(Name: "_LP64");
1093 Builder.defineMacro(Name: "__LP64__");
1094 }
1095
1096 if (TI.getPointerWidth(AddrSpace: LangAS::Default) == 32 && TI.getLongWidth() == 32 &&
1097 TI.getIntWidth() == 32) {
1098 Builder.defineMacro(Name: "_ILP32");
1099 Builder.defineMacro(Name: "__ILP32__");
1100 }
1101
1102 // Define type sizing macros based on the target properties.
1103 assert(TI.getCharWidth() == 8 && "Only support 8-bit char so far");
1104 Builder.defineMacro(Name: "__CHAR_BIT__", Value: Twine(TI.getCharWidth()));
1105
1106 Builder.defineMacro(Name: "__BOOL_WIDTH__", Value: Twine(TI.getBoolWidth()));
1107 Builder.defineMacro(Name: "__SHRT_WIDTH__", Value: Twine(TI.getShortWidth()));
1108 Builder.defineMacro(Name: "__INT_WIDTH__", Value: Twine(TI.getIntWidth()));
1109 Builder.defineMacro(Name: "__LONG_WIDTH__", Value: Twine(TI.getLongWidth()));
1110 Builder.defineMacro(Name: "__LLONG_WIDTH__", Value: Twine(TI.getLongLongWidth()));
1111
1112 size_t BitIntMaxWidth = TI.getMaxBitIntWidth();
1113 assert(BitIntMaxWidth <= llvm::IntegerType::MAX_INT_BITS &&
1114 "Target defined a max bit width larger than LLVM can support!");
1115 assert(BitIntMaxWidth >= TI.getLongLongWidth() &&
1116 "Target defined a max bit width smaller than the C standard allows!");
1117 Builder.defineMacro(Name: "__BITINT_MAXWIDTH__", Value: Twine(BitIntMaxWidth));
1118
1119 DefineTypeSize(MacroName: "__SCHAR_MAX__", Ty: TargetInfo::SignedChar, TI, Builder);
1120 DefineTypeSize(MacroName: "__SHRT_MAX__", Ty: TargetInfo::SignedShort, TI, Builder);
1121 DefineTypeSize(MacroName: "__INT_MAX__", Ty: TargetInfo::SignedInt, TI, Builder);
1122 DefineTypeSize(MacroName: "__LONG_MAX__", Ty: TargetInfo::SignedLong, TI, Builder);
1123 DefineTypeSize(MacroName: "__LONG_LONG_MAX__", Ty: TargetInfo::SignedLongLong, TI, Builder);
1124 DefineTypeSizeAndWidth(Prefix: "__WCHAR", Ty: TI.getWCharType(), TI, Builder);
1125 DefineTypeSizeAndWidth(Prefix: "__WINT", Ty: TI.getWIntType(), TI, Builder);
1126 DefineTypeSizeAndWidth(Prefix: "__INTMAX", Ty: TI.getIntMaxType(), TI, Builder);
1127 DefineTypeSizeAndWidth(Prefix: "__SIZE", Ty: TI.getSizeType(), TI, Builder);
1128
1129 DefineTypeSizeAndWidth(Prefix: "__UINTMAX", Ty: TI.getUIntMaxType(), TI, Builder);
1130 DefineTypeSizeAndWidth(Prefix: "__PTRDIFF", Ty: TI.getPtrDiffType(AddrSpace: LangAS::Default), TI,
1131 Builder);
1132 DefineTypeSizeAndWidth(Prefix: "__INTPTR", Ty: TI.getIntPtrType(), TI, Builder);
1133 DefineTypeSizeAndWidth(Prefix: "__UINTPTR", Ty: TI.getUIntPtrType(), TI, Builder);
1134
1135 DefineTypeSizeof(MacroName: "__SIZEOF_DOUBLE__", BitWidth: TI.getDoubleWidth(), TI, Builder);
1136 DefineTypeSizeof(MacroName: "__SIZEOF_FLOAT__", BitWidth: TI.getFloatWidth(), TI, Builder);
1137 DefineTypeSizeof(MacroName: "__SIZEOF_INT__", BitWidth: TI.getIntWidth(), TI, Builder);
1138 DefineTypeSizeof(MacroName: "__SIZEOF_LONG__", BitWidth: TI.getLongWidth(), TI, Builder);
1139 DefineTypeSizeof(MacroName: "__SIZEOF_LONG_DOUBLE__",BitWidth: TI.getLongDoubleWidth(),TI,Builder);
1140 DefineTypeSizeof(MacroName: "__SIZEOF_LONG_LONG__", BitWidth: TI.getLongLongWidth(), TI, Builder);
1141 DefineTypeSizeof(MacroName: "__SIZEOF_POINTER__", BitWidth: TI.getPointerWidth(AddrSpace: LangAS::Default),
1142 TI, Builder);
1143 DefineTypeSizeof(MacroName: "__SIZEOF_SHORT__", BitWidth: TI.getShortWidth(), TI, Builder);
1144 DefineTypeSizeof(MacroName: "__SIZEOF_PTRDIFF_T__",
1145 BitWidth: TI.getTypeWidth(T: TI.getPtrDiffType(AddrSpace: LangAS::Default)), TI,
1146 Builder);
1147 DefineTypeSizeof(MacroName: "__SIZEOF_SIZE_T__",
1148 BitWidth: TI.getTypeWidth(T: TI.getSizeType()), TI, Builder);
1149 DefineTypeSizeof(MacroName: "__SIZEOF_WCHAR_T__",
1150 BitWidth: TI.getTypeWidth(T: TI.getWCharType()), TI, Builder);
1151 DefineTypeSizeof(MacroName: "__SIZEOF_WINT_T__",
1152 BitWidth: TI.getTypeWidth(T: TI.getWIntType()), TI, Builder);
1153 if (TI.hasInt128Type())
1154 DefineTypeSizeof(MacroName: "__SIZEOF_INT128__", BitWidth: 128, TI, Builder);
1155
1156 DefineType(MacroName: "__INTMAX_TYPE__", Ty: TI.getIntMaxType(), Builder);
1157 DefineFmt(LangOpts, Prefix: "__INTMAX", Ty: TI.getIntMaxType(), TI, Builder);
1158 Builder.defineMacro(Name: "__INTMAX_C_SUFFIX__",
1159 Value: TI.getTypeConstantSuffix(T: TI.getIntMaxType()));
1160 DefineType(MacroName: "__UINTMAX_TYPE__", Ty: TI.getUIntMaxType(), Builder);
1161 DefineFmt(LangOpts, Prefix: "__UINTMAX", Ty: TI.getUIntMaxType(), TI, Builder);
1162 Builder.defineMacro(Name: "__UINTMAX_C_SUFFIX__",
1163 Value: TI.getTypeConstantSuffix(T: TI.getUIntMaxType()));
1164 DefineType(MacroName: "__PTRDIFF_TYPE__", Ty: TI.getPtrDiffType(AddrSpace: LangAS::Default), Builder);
1165 DefineFmt(LangOpts, Prefix: "__PTRDIFF", Ty: TI.getPtrDiffType(AddrSpace: LangAS::Default), TI,
1166 Builder);
1167 DefineType(MacroName: "__INTPTR_TYPE__", Ty: TI.getIntPtrType(), Builder);
1168 DefineFmt(LangOpts, Prefix: "__INTPTR", Ty: TI.getIntPtrType(), TI, Builder);
1169 DefineType(MacroName: "__SIZE_TYPE__", Ty: TI.getSizeType(), Builder);
1170 DefineFmt(LangOpts, Prefix: "__SIZE", Ty: TI.getSizeType(), TI, Builder);
1171 DefineType(MacroName: "__WCHAR_TYPE__", Ty: TI.getWCharType(), Builder);
1172 DefineType(MacroName: "__WINT_TYPE__", Ty: TI.getWIntType(), Builder);
1173 DefineTypeSizeAndWidth(Prefix: "__SIG_ATOMIC", Ty: TI.getSigAtomicType(), TI, Builder);
1174 if (LangOpts.C23)
1175 DefineType(MacroName: "__CHAR8_TYPE__", Ty: TI.UnsignedChar, Builder);
1176 DefineType(MacroName: "__CHAR16_TYPE__", Ty: TI.getChar16Type(), Builder);
1177 DefineType(MacroName: "__CHAR32_TYPE__", Ty: TI.getChar32Type(), Builder);
1178
1179 DefineType(MacroName: "__UINTPTR_TYPE__", Ty: TI.getUIntPtrType(), Builder);
1180 DefineFmt(LangOpts, Prefix: "__UINTPTR", Ty: TI.getUIntPtrType(), TI, Builder);
1181
1182 // The C standard requires the width of uintptr_t and intptr_t to be the same,
1183 // per 7.20.2.4p1. Same for intmax_t and uintmax_t, per 7.20.2.5p1.
1184 assert(TI.getTypeWidth(TI.getUIntPtrType()) ==
1185 TI.getTypeWidth(TI.getIntPtrType()) &&
1186 "uintptr_t and intptr_t have different widths?");
1187 assert(TI.getTypeWidth(TI.getUIntMaxType()) ==
1188 TI.getTypeWidth(TI.getIntMaxType()) &&
1189 "uintmax_t and intmax_t have different widths?");
1190
1191 if (LangOpts.FixedPoint) {
1192 // Each unsigned type has the same width as their signed type.
1193 DefineFixedPointMacros(TI, Builder, TypeName: "SFRACT", Suffix: "HR", Width: TI.getShortFractWidth(),
1194 Scale: TI.getShortFractScale(), /*Signed=*/true);
1195 DefineFixedPointMacros(TI, Builder, TypeName: "USFRACT", Suffix: "UHR",
1196 Width: TI.getShortFractWidth(),
1197 Scale: TI.getUnsignedShortFractScale(), /*Signed=*/false);
1198 DefineFixedPointMacros(TI, Builder, TypeName: "FRACT", Suffix: "R", Width: TI.getFractWidth(),
1199 Scale: TI.getFractScale(), /*Signed=*/true);
1200 DefineFixedPointMacros(TI, Builder, TypeName: "UFRACT", Suffix: "UR", Width: TI.getFractWidth(),
1201 Scale: TI.getUnsignedFractScale(), /*Signed=*/false);
1202 DefineFixedPointMacros(TI, Builder, TypeName: "LFRACT", Suffix: "LR", Width: TI.getLongFractWidth(),
1203 Scale: TI.getLongFractScale(), /*Signed=*/true);
1204 DefineFixedPointMacros(TI, Builder, TypeName: "ULFRACT", Suffix: "ULR",
1205 Width: TI.getLongFractWidth(),
1206 Scale: TI.getUnsignedLongFractScale(), /*Signed=*/false);
1207 DefineFixedPointMacros(TI, Builder, TypeName: "SACCUM", Suffix: "HK", Width: TI.getShortAccumWidth(),
1208 Scale: TI.getShortAccumScale(), /*Signed=*/true);
1209 DefineFixedPointMacros(TI, Builder, TypeName: "USACCUM", Suffix: "UHK",
1210 Width: TI.getShortAccumWidth(),
1211 Scale: TI.getUnsignedShortAccumScale(), /*Signed=*/false);
1212 DefineFixedPointMacros(TI, Builder, TypeName: "ACCUM", Suffix: "K", Width: TI.getAccumWidth(),
1213 Scale: TI.getAccumScale(), /*Signed=*/true);
1214 DefineFixedPointMacros(TI, Builder, TypeName: "UACCUM", Suffix: "UK", Width: TI.getAccumWidth(),
1215 Scale: TI.getUnsignedAccumScale(), /*Signed=*/false);
1216 DefineFixedPointMacros(TI, Builder, TypeName: "LACCUM", Suffix: "LK", Width: TI.getLongAccumWidth(),
1217 Scale: TI.getLongAccumScale(), /*Signed=*/true);
1218 DefineFixedPointMacros(TI, Builder, TypeName: "ULACCUM", Suffix: "ULK",
1219 Width: TI.getLongAccumWidth(),
1220 Scale: TI.getUnsignedLongAccumScale(), /*Signed=*/false);
1221
1222 Builder.defineMacro(Name: "__SACCUM_IBIT__", Value: Twine(TI.getShortAccumIBits()));
1223 Builder.defineMacro(Name: "__USACCUM_IBIT__",
1224 Value: Twine(TI.getUnsignedShortAccumIBits()));
1225 Builder.defineMacro(Name: "__ACCUM_IBIT__", Value: Twine(TI.getAccumIBits()));
1226 Builder.defineMacro(Name: "__UACCUM_IBIT__", Value: Twine(TI.getUnsignedAccumIBits()));
1227 Builder.defineMacro(Name: "__LACCUM_IBIT__", Value: Twine(TI.getLongAccumIBits()));
1228 Builder.defineMacro(Name: "__ULACCUM_IBIT__",
1229 Value: Twine(TI.getUnsignedLongAccumIBits()));
1230 }
1231
1232 if (TI.hasFloat16Type())
1233 DefineFloatMacros(Builder, Prefix: "FLT16", Sem: &TI.getHalfFormat(), Ext: "F16");
1234 DefineFloatMacros(Builder, Prefix: "FLT", Sem: &TI.getFloatFormat(), Ext: "F");
1235 DefineFloatMacros(Builder, Prefix: "DBL", Sem: &TI.getDoubleFormat(), Ext: "");
1236 DefineFloatMacros(Builder, Prefix: "LDBL", Sem: &TI.getLongDoubleFormat(), Ext: "L");
1237
1238 // Define a __POINTER_WIDTH__ macro for stdint.h.
1239 Builder.defineMacro(Name: "__POINTER_WIDTH__",
1240 Value: Twine((int)TI.getPointerWidth(AddrSpace: LangAS::Default)));
1241
1242 // Define __BIGGEST_ALIGNMENT__ to be compatible with gcc.
1243 Builder.defineMacro(Name: "__BIGGEST_ALIGNMENT__",
1244 Value: Twine(TI.getSuitableAlign() / TI.getCharWidth()) );
1245
1246 if (!LangOpts.CharIsSigned)
1247 Builder.defineMacro(Name: "__CHAR_UNSIGNED__");
1248
1249 if (!TargetInfo::isTypeSigned(T: TI.getWCharType()))
1250 Builder.defineMacro(Name: "__WCHAR_UNSIGNED__");
1251
1252 if (!TargetInfo::isTypeSigned(T: TI.getWIntType()))
1253 Builder.defineMacro(Name: "__WINT_UNSIGNED__");
1254
1255 // Define exact-width integer types for stdint.h
1256 DefineExactWidthIntType(LangOpts, Ty: TargetInfo::SignedChar, TI, Builder);
1257
1258 if (TI.getShortWidth() > TI.getCharWidth())
1259 DefineExactWidthIntType(LangOpts, Ty: TargetInfo::SignedShort, TI, Builder);
1260
1261 if (TI.getIntWidth() > TI.getShortWidth())
1262 DefineExactWidthIntType(LangOpts, Ty: TargetInfo::SignedInt, TI, Builder);
1263
1264 if (TI.getLongWidth() > TI.getIntWidth())
1265 DefineExactWidthIntType(LangOpts, Ty: TargetInfo::SignedLong, TI, Builder);
1266
1267 if (TI.getLongLongWidth() > TI.getLongWidth())
1268 DefineExactWidthIntType(LangOpts, Ty: TargetInfo::SignedLongLong, TI, Builder);
1269
1270 DefineExactWidthIntType(LangOpts, Ty: TargetInfo::UnsignedChar, TI, Builder);
1271 DefineExactWidthIntTypeSize(Ty: TargetInfo::UnsignedChar, TI, Builder);
1272 DefineExactWidthIntTypeSize(Ty: TargetInfo::SignedChar, TI, Builder);
1273
1274 if (TI.getShortWidth() > TI.getCharWidth()) {
1275 DefineExactWidthIntType(LangOpts, Ty: TargetInfo::UnsignedShort, TI, Builder);
1276 DefineExactWidthIntTypeSize(Ty: TargetInfo::UnsignedShort, TI, Builder);
1277 DefineExactWidthIntTypeSize(Ty: TargetInfo::SignedShort, TI, Builder);
1278 }
1279
1280 if (TI.getIntWidth() > TI.getShortWidth()) {
1281 DefineExactWidthIntType(LangOpts, Ty: TargetInfo::UnsignedInt, TI, Builder);
1282 DefineExactWidthIntTypeSize(Ty: TargetInfo::UnsignedInt, TI, Builder);
1283 DefineExactWidthIntTypeSize(Ty: TargetInfo::SignedInt, TI, Builder);
1284 }
1285
1286 if (TI.getLongWidth() > TI.getIntWidth()) {
1287 DefineExactWidthIntType(LangOpts, Ty: TargetInfo::UnsignedLong, TI, Builder);
1288 DefineExactWidthIntTypeSize(Ty: TargetInfo::UnsignedLong, TI, Builder);
1289 DefineExactWidthIntTypeSize(Ty: TargetInfo::SignedLong, TI, Builder);
1290 }
1291
1292 if (TI.getLongLongWidth() > TI.getLongWidth()) {
1293 DefineExactWidthIntType(LangOpts, Ty: TargetInfo::UnsignedLongLong, TI,
1294 Builder);
1295 DefineExactWidthIntTypeSize(Ty: TargetInfo::UnsignedLongLong, TI, Builder);
1296 DefineExactWidthIntTypeSize(Ty: TargetInfo::SignedLongLong, TI, Builder);
1297 }
1298
1299 DefineLeastWidthIntType(LangOpts, TypeWidth: 8, IsSigned: true, TI, Builder);
1300 DefineLeastWidthIntType(LangOpts, TypeWidth: 8, IsSigned: false, TI, Builder);
1301 DefineLeastWidthIntType(LangOpts, TypeWidth: 16, IsSigned: true, TI, Builder);
1302 DefineLeastWidthIntType(LangOpts, TypeWidth: 16, IsSigned: false, TI, Builder);
1303 DefineLeastWidthIntType(LangOpts, TypeWidth: 32, IsSigned: true, TI, Builder);
1304 DefineLeastWidthIntType(LangOpts, TypeWidth: 32, IsSigned: false, TI, Builder);
1305 DefineLeastWidthIntType(LangOpts, TypeWidth: 64, IsSigned: true, TI, Builder);
1306 DefineLeastWidthIntType(LangOpts, TypeWidth: 64, IsSigned: false, TI, Builder);
1307
1308 DefineFastIntType(LangOpts, TypeWidth: 8, IsSigned: true, TI, Builder);
1309 DefineFastIntType(LangOpts, TypeWidth: 8, IsSigned: false, TI, Builder);
1310 DefineFastIntType(LangOpts, TypeWidth: 16, IsSigned: true, TI, Builder);
1311 DefineFastIntType(LangOpts, TypeWidth: 16, IsSigned: false, TI, Builder);
1312 DefineFastIntType(LangOpts, TypeWidth: 32, IsSigned: true, TI, Builder);
1313 DefineFastIntType(LangOpts, TypeWidth: 32, IsSigned: false, TI, Builder);
1314 DefineFastIntType(LangOpts, TypeWidth: 64, IsSigned: true, TI, Builder);
1315 DefineFastIntType(LangOpts, TypeWidth: 64, IsSigned: false, TI, Builder);
1316
1317 Builder.defineMacro(Name: "__USER_LABEL_PREFIX__", Value: TI.getUserLabelPrefix());
1318
1319 if (!LangOpts.MathErrno)
1320 Builder.defineMacro(Name: "__NO_MATH_ERRNO__");
1321
1322 if (LangOpts.FastMath || LangOpts.FiniteMathOnly)
1323 Builder.defineMacro(Name: "__FINITE_MATH_ONLY__", Value: "1");
1324 else
1325 Builder.defineMacro(Name: "__FINITE_MATH_ONLY__", Value: "0");
1326
1327 if (LangOpts.GNUCVersion) {
1328 if (LangOpts.GNUInline || LangOpts.CPlusPlus)
1329 Builder.defineMacro(Name: "__GNUC_GNU_INLINE__");
1330 else
1331 Builder.defineMacro(Name: "__GNUC_STDC_INLINE__");
1332
1333 // The value written by __atomic_test_and_set.
1334 // FIXME: This is target-dependent.
1335 Builder.defineMacro(Name: "__GCC_ATOMIC_TEST_AND_SET_TRUEVAL", Value: "1");
1336 }
1337
1338 // GCC defines these macros in both C and C++ modes despite them being needed
1339 // mostly for STL implementations in C++.
1340 auto [Destructive, Constructive] = TI.hardwareInterferenceSizes();
1341 Builder.defineMacro(Name: "__GCC_DESTRUCTIVE_SIZE", Value: Twine(Destructive));
1342 Builder.defineMacro(Name: "__GCC_CONSTRUCTIVE_SIZE", Value: Twine(Constructive));
1343 // We need to use push_macro to allow users to redefine these macros from the
1344 // command line with -D and not issue a -Wmacro-redefined warning.
1345 Builder.append(Str: "#pragma push_macro(\"__GCC_DESTRUCTIVE_SIZE\")");
1346 Builder.append(Str: "#pragma push_macro(\"__GCC_CONSTRUCTIVE_SIZE\")");
1347
1348 auto addLockFreeMacros = [&](const llvm::Twine &Prefix) {
1349 // Used by libc++ and libstdc++ to implement ATOMIC_<foo>_LOCK_FREE.
1350#define DEFINE_LOCK_FREE_MACRO(TYPE, Type) \
1351 Builder.defineMacro(Prefix + #TYPE "_LOCK_FREE", \
1352 getLockFreeValue(TI.get##Type##Width(), TI));
1353 DEFINE_LOCK_FREE_MACRO(BOOL, Bool);
1354 DEFINE_LOCK_FREE_MACRO(CHAR, Char);
1355 // char8_t has the same representation / width as unsigned
1356 // char in C++ and is a typedef for unsigned char in C23
1357 if (LangOpts.Char8 || LangOpts.C23)
1358 DEFINE_LOCK_FREE_MACRO(CHAR8_T, Char);
1359 DEFINE_LOCK_FREE_MACRO(CHAR16_T, Char16);
1360 DEFINE_LOCK_FREE_MACRO(CHAR32_T, Char32);
1361 DEFINE_LOCK_FREE_MACRO(WCHAR_T, WChar);
1362 DEFINE_LOCK_FREE_MACRO(SHORT, Short);
1363 DEFINE_LOCK_FREE_MACRO(INT, Int);
1364 DEFINE_LOCK_FREE_MACRO(LONG, Long);
1365 DEFINE_LOCK_FREE_MACRO(LLONG, LongLong);
1366 Builder.defineMacro(
1367 Name: Prefix + "POINTER_LOCK_FREE",
1368 Value: getLockFreeValue(TypeWidth: TI.getPointerWidth(AddrSpace: LangAS::Default), TI));
1369#undef DEFINE_LOCK_FREE_MACRO
1370 };
1371 addLockFreeMacros("__CLANG_ATOMIC_");
1372 if (LangOpts.GNUCVersion)
1373 addLockFreeMacros("__GCC_ATOMIC_");
1374
1375 if (LangOpts.NoInlineDefine)
1376 Builder.defineMacro(Name: "__NO_INLINE__");
1377
1378 if (unsigned PICLevel = LangOpts.PICLevel) {
1379 Builder.defineMacro(Name: "__PIC__", Value: Twine(PICLevel));
1380 Builder.defineMacro(Name: "__pic__", Value: Twine(PICLevel));
1381 if (LangOpts.PIE) {
1382 Builder.defineMacro(Name: "__PIE__", Value: Twine(PICLevel));
1383 Builder.defineMacro(Name: "__pie__", Value: Twine(PICLevel));
1384 }
1385 }
1386
1387 // Macros to control C99 numerics and <float.h>
1388 Builder.defineMacro(Name: "__FLT_RADIX__", Value: "2");
1389 Builder.defineMacro(Name: "__DECIMAL_DIG__", Value: "__LDBL_DECIMAL_DIG__");
1390
1391 if (LangOpts.getStackProtector() == LangOptions::SSPOn)
1392 Builder.defineMacro(Name: "__SSP__");
1393 else if (LangOpts.getStackProtector() == LangOptions::SSPStrong)
1394 Builder.defineMacro(Name: "__SSP_STRONG__", Value: "2");
1395 else if (LangOpts.getStackProtector() == LangOptions::SSPReq)
1396 Builder.defineMacro(Name: "__SSP_ALL__", Value: "3");
1397
1398 if (PPOpts.SetUpStaticAnalyzer)
1399 Builder.defineMacro(Name: "__clang_analyzer__");
1400
1401 if (LangOpts.FastRelaxedMath)
1402 Builder.defineMacro(Name: "__FAST_RELAXED_MATH__");
1403
1404 if (FEOpts.ProgramAction == frontend::RewriteObjC ||
1405 LangOpts.getGC() != LangOptions::NonGC) {
1406 Builder.defineMacro(Name: "__weak", Value: "__attribute__((objc_gc(weak)))");
1407 Builder.defineMacro(Name: "__strong", Value: "__attribute__((objc_gc(strong)))");
1408 Builder.defineMacro(Name: "__autoreleasing", Value: "");
1409 Builder.defineMacro(Name: "__unsafe_unretained", Value: "");
1410 } else if (LangOpts.ObjC) {
1411 Builder.defineMacro(Name: "__weak", Value: "__attribute__((objc_ownership(weak)))");
1412 Builder.defineMacro(Name: "__strong", Value: "__attribute__((objc_ownership(strong)))");
1413 Builder.defineMacro(Name: "__autoreleasing",
1414 Value: "__attribute__((objc_ownership(autoreleasing)))");
1415 Builder.defineMacro(Name: "__unsafe_unretained",
1416 Value: "__attribute__((objc_ownership(none)))");
1417 }
1418
1419 // On Darwin, there are __double_underscored variants of the type
1420 // nullability qualifiers.
1421 if (TI.getTriple().isOSDarwin()) {
1422 Builder.defineMacro(Name: "__nonnull", Value: "_Nonnull");
1423 Builder.defineMacro(Name: "__null_unspecified", Value: "_Null_unspecified");
1424 Builder.defineMacro(Name: "__nullable", Value: "_Nullable");
1425 }
1426
1427 // Add a macro to differentiate between regular iOS/tvOS/watchOS targets and
1428 // the corresponding simulator targets.
1429 if (TI.getTriple().isOSDarwin() && TI.getTriple().isSimulatorEnvironment())
1430 Builder.defineMacro(Name: "__APPLE_EMBEDDED_SIMULATOR__", Value: "1");
1431
1432 // OpenMP definition
1433 // OpenMP 2.2:
1434 // In implementations that support a preprocessor, the _OPENMP
1435 // macro name is defined to have the decimal value yyyymm where
1436 // yyyy and mm are the year and the month designations of the
1437 // version of the OpenMP API that the implementation support.
1438 if (!LangOpts.OpenMPSimd) {
1439 switch (LangOpts.OpenMP) {
1440 case 0:
1441 break;
1442 case 31:
1443 Builder.defineMacro(Name: "_OPENMP", Value: "201107");
1444 break;
1445 case 40:
1446 Builder.defineMacro(Name: "_OPENMP", Value: "201307");
1447 break;
1448 case 45:
1449 Builder.defineMacro(Name: "_OPENMP", Value: "201511");
1450 break;
1451 case 50:
1452 Builder.defineMacro(Name: "_OPENMP", Value: "201811");
1453 break;
1454 case 52:
1455 Builder.defineMacro(Name: "_OPENMP", Value: "202111");
1456 break;
1457 default: // case 51:
1458 // Default version is OpenMP 5.1
1459 Builder.defineMacro(Name: "_OPENMP", Value: "202011");
1460 break;
1461 }
1462 }
1463
1464 // CUDA device path compilaton
1465 if (LangOpts.CUDAIsDevice && !LangOpts.HIP) {
1466 // The CUDA_ARCH value is set for the GPU target specified in the NVPTX
1467 // backend's target defines.
1468 Builder.defineMacro(Name: "__CUDA_ARCH__");
1469 }
1470
1471 // We need to communicate this to our CUDA/HIP header wrapper, which in turn
1472 // informs the proper CUDA/HIP headers of this choice.
1473 if (LangOpts.GPUDeviceApproxTranscendentals)
1474 Builder.defineMacro(Name: "__CLANG_GPU_APPROX_TRANSCENDENTALS__");
1475
1476 // Define a macro indicating that the source file is being compiled with a
1477 // SYCL device compiler which doesn't produce host binary.
1478 if (LangOpts.SYCLIsDevice) {
1479 Builder.defineMacro(Name: "__SYCL_DEVICE_ONLY__", Value: "1");
1480 }
1481
1482 // OpenCL definitions.
1483 if (LangOpts.OpenCL) {
1484 InitializeOpenCLFeatureTestMacros(TI, Opts: LangOpts, Builder);
1485
1486 if (TI.getTriple().isSPIR() || TI.getTriple().isSPIRV())
1487 Builder.defineMacro(Name: "__IMAGE_SUPPORT__");
1488 }
1489
1490 if (TI.hasInt128Type() && LangOpts.CPlusPlus && LangOpts.GNUMode) {
1491 // For each extended integer type, g++ defines a macro mapping the
1492 // index of the type (0 in this case) in some list of extended types
1493 // to the type.
1494 Builder.defineMacro(Name: "__GLIBCXX_TYPE_INT_N_0", Value: "__int128");
1495 Builder.defineMacro(Name: "__GLIBCXX_BITSIZE_INT_N_0", Value: "128");
1496 }
1497
1498 // ELF targets define __ELF__
1499 if (TI.getTriple().isOSBinFormatELF())
1500 Builder.defineMacro(Name: "__ELF__");
1501
1502 // Target OS macro definitions.
1503 if (PPOpts.DefineTargetOSMacros) {
1504 const llvm::Triple &Triple = TI.getTriple();
1505#define TARGET_OS(Name, Predicate) \
1506 Builder.defineMacro(#Name, (Predicate) ? "1" : "0");
1507#include "clang/Basic/TargetOSMacros.def"
1508#undef TARGET_OS
1509 }
1510
1511 // Get other target #defines.
1512 TI.getTargetDefines(Opts: LangOpts, Builder);
1513}
1514
1515static void InitializePGOProfileMacros(const CodeGenOptions &CodeGenOpts,
1516 MacroBuilder &Builder) {
1517 if (CodeGenOpts.hasProfileInstr())
1518 Builder.defineMacro(Name: "__LLVM_INSTR_PROFILE_GENERATE");
1519
1520 if (CodeGenOpts.hasProfileIRUse() || CodeGenOpts.hasProfileClangUse())
1521 Builder.defineMacro(Name: "__LLVM_INSTR_PROFILE_USE");
1522}
1523
1524/// InitializePreprocessor - Initialize the preprocessor getting it and the
1525/// environment ready to process a single file.
1526void clang::InitializePreprocessor(Preprocessor &PP,
1527 const PreprocessorOptions &InitOpts,
1528 const PCHContainerReader &PCHContainerRdr,
1529 const FrontendOptions &FEOpts,
1530 const CodeGenOptions &CodeGenOpts) {
1531 const LangOptions &LangOpts = PP.getLangOpts();
1532 std::string PredefineBuffer;
1533 PredefineBuffer.reserve(res_arg: 4080);
1534 llvm::raw_string_ostream Predefines(PredefineBuffer);
1535 MacroBuilder Builder(Predefines);
1536
1537 // Emit line markers for various builtin sections of the file. The 3 here
1538 // marks <built-in> as being a system header, which suppresses warnings when
1539 // the same macro is defined multiple times.
1540 Builder.append(Str: "# 1 \"<built-in>\" 3");
1541
1542 // Install things like __POWERPC__, __GNUC__, etc into the macro table.
1543 if (InitOpts.UsePredefines) {
1544 // FIXME: This will create multiple definitions for most of the predefined
1545 // macros. This is not the right way to handle this.
1546 if ((LangOpts.CUDA || LangOpts.OpenMPIsTargetDevice ||
1547 LangOpts.SYCLIsDevice) &&
1548 PP.getAuxTargetInfo())
1549 InitializePredefinedMacros(TI: *PP.getAuxTargetInfo(), LangOpts, FEOpts,
1550 PPOpts: PP.getPreprocessorOpts(), Builder);
1551
1552 InitializePredefinedMacros(TI: PP.getTargetInfo(), LangOpts, FEOpts,
1553 PPOpts: PP.getPreprocessorOpts(), Builder);
1554
1555 // Install definitions to make Objective-C++ ARC work well with various
1556 // C++ Standard Library implementations.
1557 if (LangOpts.ObjC && LangOpts.CPlusPlus &&
1558 (LangOpts.ObjCAutoRefCount || LangOpts.ObjCWeak)) {
1559 switch (InitOpts.ObjCXXARCStandardLibrary) {
1560 case ARCXX_nolib:
1561 case ARCXX_libcxx:
1562 break;
1563
1564 case ARCXX_libstdcxx:
1565 AddObjCXXARCLibstdcxxDefines(LangOpts, Builder);
1566 break;
1567 }
1568 }
1569 }
1570
1571 // Even with predefines off, some macros are still predefined.
1572 // These should all be defined in the preprocessor according to the
1573 // current language configuration.
1574 InitializeStandardPredefinedMacros(TI: PP.getTargetInfo(), LangOpts: PP.getLangOpts(),
1575 FEOpts, Builder);
1576
1577 // The PGO instrumentation profile macros are driven by options
1578 // -fprofile[-instr]-generate/-fcs-profile-generate/-fprofile[-instr]-use,
1579 // hence they are not guarded by InitOpts.UsePredefines.
1580 InitializePGOProfileMacros(CodeGenOpts, Builder);
1581
1582 // Add on the predefines from the driver. Wrap in a #line directive to report
1583 // that they come from the command line.
1584 Builder.append(Str: "# 1 \"<command line>\" 1");
1585
1586 // Process #define's and #undef's in the order they are given.
1587 for (unsigned i = 0, e = InitOpts.Macros.size(); i != e; ++i) {
1588 if (InitOpts.Macros[i].second) // isUndef
1589 Builder.undefineMacro(Name: InitOpts.Macros[i].first);
1590 else
1591 DefineBuiltinMacro(Builder, Macro: InitOpts.Macros[i].first,
1592 Diags&: PP.getDiagnostics());
1593 }
1594
1595 // Exit the command line and go back to <built-in> (2 is LC_LEAVE).
1596 Builder.append(Str: "# 1 \"<built-in>\" 2");
1597
1598 // If -imacros are specified, include them now. These are processed before
1599 // any -include directives.
1600 for (unsigned i = 0, e = InitOpts.MacroIncludes.size(); i != e; ++i)
1601 AddImplicitIncludeMacros(Builder, File: InitOpts.MacroIncludes[i]);
1602
1603 // Process -include-pch/-include-pth directives.
1604 if (!InitOpts.ImplicitPCHInclude.empty())
1605 AddImplicitIncludePCH(Builder, PP, PCHContainerRdr,
1606 ImplicitIncludePCH: InitOpts.ImplicitPCHInclude);
1607
1608 // Process -include directives.
1609 for (unsigned i = 0, e = InitOpts.Includes.size(); i != e; ++i) {
1610 const std::string &Path = InitOpts.Includes[i];
1611 AddImplicitInclude(Builder, File: Path);
1612 }
1613
1614 // Instruct the preprocessor to skip the preamble.
1615 PP.setSkipMainFilePreamble(Bytes: InitOpts.PrecompiledPreambleBytes.first,
1616 StartOfLine: InitOpts.PrecompiledPreambleBytes.second);
1617
1618 // Copy PredefinedBuffer into the Preprocessor.
1619 PP.setPredefines(std::move(PredefineBuffer));
1620}
1621