1	//===- ASTReader.cpp - AST File Reader ------------------------------------===//
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 defines the ASTReader class, which reads AST files.
10	//
11	//===----------------------------------------------------------------------===//
12
13	#include "ASTCommon.h"
14	#include "ASTReaderInternals.h"
15	#include "clang/AST/ASTConsumer.h"
16	#include "clang/AST/ASTContext.h"
17	#include "clang/AST/ASTMutationListener.h"
18	#include "clang/AST/ASTStructuralEquivalence.h"
19	#include "clang/AST/ASTUnresolvedSet.h"
20	#include "clang/AST/AbstractTypeReader.h"
21	#include "clang/AST/Decl.h"
22	#include "clang/AST/DeclBase.h"
23	#include "clang/AST/DeclCXX.h"
24	#include "clang/AST/DeclFriend.h"
25	#include "clang/AST/DeclGroup.h"
26	#include "clang/AST/DeclObjC.h"
27	#include "clang/AST/DeclTemplate.h"
28	#include "clang/AST/DeclarationName.h"
29	#include "clang/AST/Expr.h"
30	#include "clang/AST/ExprCXX.h"
31	#include "clang/AST/ExternalASTSource.h"
32	#include "clang/AST/NestedNameSpecifier.h"
33	#include "clang/AST/ODRDiagsEmitter.h"
34	#include "clang/AST/ODRHash.h"
35	#include "clang/AST/OpenMPClause.h"
36	#include "clang/AST/RawCommentList.h"
37	#include "clang/AST/TemplateBase.h"
38	#include "clang/AST/TemplateName.h"
39	#include "clang/AST/Type.h"
40	#include "clang/AST/TypeLoc.h"
41	#include "clang/AST/TypeLocVisitor.h"
42	#include "clang/AST/UnresolvedSet.h"
43	#include "clang/Basic/CommentOptions.h"
44	#include "clang/Basic/Diagnostic.h"
45	#include "clang/Basic/DiagnosticError.h"
46	#include "clang/Basic/DiagnosticOptions.h"
47	#include "clang/Basic/DiagnosticSema.h"
48	#include "clang/Basic/ExceptionSpecificationType.h"
49	#include "clang/Basic/FileManager.h"
50	#include "clang/Basic/FileSystemOptions.h"
51	#include "clang/Basic/IdentifierTable.h"
52	#include "clang/Basic/LLVM.h"
53	#include "clang/Basic/LangOptions.h"
54	#include "clang/Basic/Module.h"
55	#include "clang/Basic/ObjCRuntime.h"
56	#include "clang/Basic/OpenMPKinds.h"
57	#include "clang/Basic/OperatorKinds.h"
58	#include "clang/Basic/PragmaKinds.h"
59	#include "clang/Basic/Sanitizers.h"
60	#include "clang/Basic/SourceLocation.h"
61	#include "clang/Basic/SourceManager.h"
62	#include "clang/Basic/SourceManagerInternals.h"
63	#include "clang/Basic/Specifiers.h"
64	#include "clang/Basic/TargetInfo.h"
65	#include "clang/Basic/TargetOptions.h"
66	#include "clang/Basic/TokenKinds.h"
67	#include "clang/Basic/Version.h"
68	#include "clang/Lex/HeaderSearch.h"
69	#include "clang/Lex/HeaderSearchOptions.h"
70	#include "clang/Lex/MacroInfo.h"
71	#include "clang/Lex/ModuleMap.h"
72	#include "clang/Lex/PreprocessingRecord.h"
73	#include "clang/Lex/Preprocessor.h"
74	#include "clang/Lex/PreprocessorOptions.h"
75	#include "clang/Lex/Token.h"
76	#include "clang/Sema/ObjCMethodList.h"
77	#include "clang/Sema/Scope.h"
78	#include "clang/Sema/Sema.h"
79	#include "clang/Sema/Weak.h"
80	#include "clang/Serialization/ASTBitCodes.h"
81	#include "clang/Serialization/ASTDeserializationListener.h"
82	#include "clang/Serialization/ASTRecordReader.h"
83	#include "clang/Serialization/ContinuousRangeMap.h"
84	#include "clang/Serialization/GlobalModuleIndex.h"
85	#include "clang/Serialization/InMemoryModuleCache.h"
86	#include "clang/Serialization/ModuleFile.h"
87	#include "clang/Serialization/ModuleFileExtension.h"
88	#include "clang/Serialization/ModuleManager.h"
89	#include "clang/Serialization/PCHContainerOperations.h"
90	#include "clang/Serialization/SerializationDiagnostic.h"
91	#include "llvm/ADT/APFloat.h"
92	#include "llvm/ADT/APInt.h"
93	#include "llvm/ADT/APSInt.h"
94	#include "llvm/ADT/ArrayRef.h"
95	#include "llvm/ADT/DenseMap.h"
96	#include "llvm/ADT/FloatingPointMode.h"
97	#include "llvm/ADT/FoldingSet.h"
98	#include "llvm/ADT/Hashing.h"
99	#include "llvm/ADT/IntrusiveRefCntPtr.h"
100	#include "llvm/ADT/STLExtras.h"
101	#include "llvm/ADT/ScopeExit.h"
102	#include "llvm/ADT/SmallPtrSet.h"
103	#include "llvm/ADT/SmallString.h"
104	#include "llvm/ADT/SmallVector.h"
105	#include "llvm/ADT/StringExtras.h"
106	#include "llvm/ADT/StringMap.h"
107	#include "llvm/ADT/StringRef.h"
108	#include "llvm/ADT/iterator_range.h"
109	#include "llvm/Bitstream/BitstreamReader.h"
110	#include "llvm/Support/Casting.h"
111	#include "llvm/Support/Compiler.h"
112	#include "llvm/Support/Compression.h"
113	#include "llvm/Support/DJB.h"
114	#include "llvm/Support/Endian.h"
115	#include "llvm/Support/Error.h"
116	#include "llvm/Support/ErrorHandling.h"
117	#include "llvm/Support/FileSystem.h"
118	#include "llvm/Support/LEB128.h"
119	#include "llvm/Support/MemoryBuffer.h"
120	#include "llvm/Support/Path.h"
121	#include "llvm/Support/SaveAndRestore.h"
122	#include "llvm/Support/TimeProfiler.h"
123	#include "llvm/Support/Timer.h"
124	#include "llvm/Support/VersionTuple.h"
125	#include "llvm/Support/raw_ostream.h"
126	#include "llvm/TargetParser/Triple.h"
127	#include <algorithm>
128	#include <cassert>
129	#include <cstddef>
130	#include <cstdint>
131	#include <cstdio>
132	#include <ctime>
133	#include <iterator>
134	#include <limits>
135	#include <map>
136	#include <memory>
137	#include <optional>
138	#include <string>
139	#include <system_error>
140	#include <tuple>
141	#include <utility>
142	#include <vector>
143
144	using namespace clang;
145	using namespace clang::serialization;
146	using namespace clang::serialization::reader;
147	using llvm::BitstreamCursor;
148
149	//===----------------------------------------------------------------------===//
150	// ChainedASTReaderListener implementation
151	//===----------------------------------------------------------------------===//
152
153	bool
154	ChainedASTReaderListener::ReadFullVersionInformation(StringRef FullVersion) {
155	return First->ReadFullVersionInformation(FullVersion) ||
156	Second->ReadFullVersionInformation(FullVersion);
157	}
158
159	void ChainedASTReaderListener::ReadModuleName(StringRef ModuleName) {
160	First->ReadModuleName(ModuleName);
161	Second->ReadModuleName(ModuleName);
162	}
163
164	void ChainedASTReaderListener::ReadModuleMapFile(StringRef ModuleMapPath) {
165	First->ReadModuleMapFile(ModuleMapPath);
166	Second->ReadModuleMapFile(ModuleMapPath);
167	}
168
169	bool
170	ChainedASTReaderListener::ReadLanguageOptions(const LangOptions &LangOpts,
171	bool Complain,
172	bool AllowCompatibleDifferences) {
173	return First->ReadLanguageOptions(LangOpts, Complain,
174	AllowCompatibleDifferences) ||
175	Second->ReadLanguageOptions(LangOpts, Complain,
176	AllowCompatibleDifferences);
177	}
178
179	bool ChainedASTReaderListener::ReadTargetOptions(
180	const TargetOptions &TargetOpts, bool Complain,
181	bool AllowCompatibleDifferences) {
182	return First->ReadTargetOptions(TargetOpts, Complain,
183	AllowCompatibleDifferences) ||
184	Second->ReadTargetOptions(TargetOpts, Complain,
185	AllowCompatibleDifferences);
186	}
187
188	bool ChainedASTReaderListener::ReadDiagnosticOptions(
189	IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts, bool Complain) {
190	return First->ReadDiagnosticOptions(DiagOpts, Complain) ||
191	Second->ReadDiagnosticOptions(DiagOpts, Complain);
192	}
193
194	bool
195	ChainedASTReaderListener::ReadFileSystemOptions(const FileSystemOptions &FSOpts,
196	bool Complain) {
197	return First->ReadFileSystemOptions(FSOpts, Complain) ||
198	Second->ReadFileSystemOptions(FSOpts, Complain);
199	}
200
201	bool ChainedASTReaderListener::ReadHeaderSearchOptions(
202	const HeaderSearchOptions &HSOpts, StringRef SpecificModuleCachePath,
203	bool Complain) {
204	return First->ReadHeaderSearchOptions(HSOpts, SpecificModuleCachePath,
205	Complain) ||
206	Second->ReadHeaderSearchOptions(HSOpts, SpecificModuleCachePath,
207	Complain);
208	}
209
210	bool ChainedASTReaderListener::ReadPreprocessorOptions(
211	const PreprocessorOptions &PPOpts, bool ReadMacros, bool Complain,
212	std::string &SuggestedPredefines) {
213	return First->ReadPreprocessorOptions(PPOpts, ReadMacros, Complain,
214	SuggestedPredefines) ||
215	Second->ReadPreprocessorOptions(PPOpts, ReadMacros, Complain,
216	SuggestedPredefines);
217	}
218
219	void ChainedASTReaderListener::ReadCounter(const serialization::ModuleFile &M,
220	unsigned Value) {
221	First->ReadCounter(M, Value);
222	Second->ReadCounter(M, Value);
223	}
224
225	bool ChainedASTReaderListener::needsInputFileVisitation() {
226	return First->needsInputFileVisitation() ||
227	Second->needsInputFileVisitation();
228	}
229
230	bool ChainedASTReaderListener::needsSystemInputFileVisitation() {
231	return First->needsSystemInputFileVisitation() ||
232	Second->needsSystemInputFileVisitation();
233	}
234
235	void ChainedASTReaderListener::visitModuleFile(StringRef Filename,
236	ModuleKind Kind) {
237	First->visitModuleFile(Filename, Kind);
238	Second->visitModuleFile(Filename, Kind);
239	}
240
241	bool ChainedASTReaderListener::visitInputFile(StringRef Filename,
242	bool isSystem,
243	bool isOverridden,
244	bool isExplicitModule) {
245	bool Continue = false;
246	if (First->needsInputFileVisitation() &&
247	(!isSystem || First->needsSystemInputFileVisitation()))
248	Continue |= First->visitInputFile(Filename, isSystem, isOverridden,
249	isExplicitModule);
250	if (Second->needsInputFileVisitation() &&
251	(!isSystem || Second->needsSystemInputFileVisitation()))
252	Continue |= Second->visitInputFile(Filename, isSystem, isOverridden,
253	isExplicitModule);
254	return Continue;
255	}
256
257	void ChainedASTReaderListener::readModuleFileExtension(
258	const ModuleFileExtensionMetadata &Metadata) {
259	First->readModuleFileExtension(Metadata);
260	Second->readModuleFileExtension(Metadata);
261	}
262
263	//===----------------------------------------------------------------------===//
264	// PCH validator implementation
265	//===----------------------------------------------------------------------===//
266
267	ASTReaderListener::~ASTReaderListener() = default;
268
269	/// Compare the given set of language options against an existing set of
270	/// language options.
271	///
272	/// \param Diags If non-NULL, diagnostics will be emitted via this engine.
273	/// \param AllowCompatibleDifferences If true, differences between compatible
274	/// language options will be permitted.
275	///
276	/// \returns true if the languagae options mis-match, false otherwise.
277	static bool checkLanguageOptions(const LangOptions &LangOpts,
278	const LangOptions &ExistingLangOpts,
279	DiagnosticsEngine *Diags,
280	bool AllowCompatibleDifferences = true) {
281	#define LANGOPT(Name, Bits, Default, Description) \
282	if (ExistingLangOpts.Name != LangOpts.Name) { \
283	if (Diags) { \
284	if (Bits == 1) \
285	Diags->Report(diag::err_pch_langopt_mismatch) \
286	<< Description << LangOpts.Name << ExistingLangOpts.Name; \
287	else \
288	Diags->Report(diag::err_pch_langopt_value_mismatch) \
289	<< Description; \
290	} \
291	return true; \
292	}
293
294	#define VALUE_LANGOPT(Name, Bits, Default, Description) \
295	if (ExistingLangOpts.Name != LangOpts.Name) { \
296	if (Diags) \
297	Diags->Report(diag::err_pch_langopt_value_mismatch) \
298	<< Description; \
299	return true; \
300	}
301
302	#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
303	if (ExistingLangOpts.get##Name() != LangOpts.get##Name()) { \
304	if (Diags) \
305	Diags->Report(diag::err_pch_langopt_value_mismatch) \
306	<< Description; \
307	return true; \
308	}
309
310	#define COMPATIBLE_LANGOPT(Name, Bits, Default, Description) \
311	if (!AllowCompatibleDifferences) \
312	LANGOPT(Name, Bits, Default, Description)
313
314	#define COMPATIBLE_ENUM_LANGOPT(Name, Bits, Default, Description) \
315	if (!AllowCompatibleDifferences) \
316	ENUM_LANGOPT(Name, Bits, Default, Description)
317
318	#define COMPATIBLE_VALUE_LANGOPT(Name, Bits, Default, Description) \
319	if (!AllowCompatibleDifferences) \
320	VALUE_LANGOPT(Name, Bits, Default, Description)
321
322	#define BENIGN_LANGOPT(Name, Bits, Default, Description)
323	#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
324	#define BENIGN_VALUE_LANGOPT(Name, Bits, Default, Description)
325	#include "clang/Basic/LangOptions.def"
326
327	if (ExistingLangOpts.ModuleFeatures != LangOpts.ModuleFeatures) {
328	if (Diags)
329	Diags->Report(diag::err_pch_langopt_value_mismatch) << "module features";
330	return true;
331	}
332
333	if (ExistingLangOpts.ObjCRuntime != LangOpts.ObjCRuntime) {
334	if (Diags)
335	Diags->Report(diag::err_pch_langopt_value_mismatch)
336	<< "target Objective-C runtime";
337	return true;
338	}
339
340	if (ExistingLangOpts.CommentOpts.BlockCommandNames !=
341	LangOpts.CommentOpts.BlockCommandNames) {
342	if (Diags)
343	Diags->Report(diag::err_pch_langopt_value_mismatch)
344	<< "block command names";
345	return true;
346	}
347
348	// Sanitizer feature mismatches are treated as compatible differences. If
349	// compatible differences aren't allowed, we still only want to check for
350	// mismatches of non-modular sanitizers (the only ones which can affect AST
351	// generation).
352	if (!AllowCompatibleDifferences) {
353	SanitizerMask ModularSanitizers = getPPTransparentSanitizers();
354	SanitizerSet ExistingSanitizers = ExistingLangOpts.Sanitize;
355	SanitizerSet ImportedSanitizers = LangOpts.Sanitize;
356	ExistingSanitizers.clear(K: ModularSanitizers);
357	ImportedSanitizers.clear(K: ModularSanitizers);
358	if (ExistingSanitizers.Mask != ImportedSanitizers.Mask) {
359	const std::string Flag = "-fsanitize=";
360	if (Diags) {
361	#define SANITIZER(NAME, ID) \
362	{ \
363	bool InExistingModule = ExistingSanitizers.has(SanitizerKind::ID); \
364	bool InImportedModule = ImportedSanitizers.has(SanitizerKind::ID); \
365	if (InExistingModule != InImportedModule) \
366	Diags->Report(diag::err_pch_targetopt_feature_mismatch) \
367	<< InExistingModule << (Flag + NAME); \
368	}
369	#include "clang/Basic/Sanitizers.def"
370	}
371	return true;
372	}
373	}
374
375	return false;
376	}
377
378	/// Compare the given set of target options against an existing set of
379	/// target options.
380	///
381	/// \param Diags If non-NULL, diagnostics will be emitted via this engine.
382	///
383	/// \returns true if the target options mis-match, false otherwise.
384	static bool checkTargetOptions(const TargetOptions &TargetOpts,
385	const TargetOptions &ExistingTargetOpts,
386	DiagnosticsEngine *Diags,
387	bool AllowCompatibleDifferences = true) {
388	#define CHECK_TARGET_OPT(Field, Name) \
389	if (TargetOpts.Field != ExistingTargetOpts.Field) { \
390	if (Diags) \
391	Diags->Report(diag::err_pch_targetopt_mismatch) \
392	<< Name << TargetOpts.Field << ExistingTargetOpts.Field; \
393	return true; \
394	}
395
396	// The triple and ABI must match exactly.
397	CHECK_TARGET_OPT(Triple, "target");
398	CHECK_TARGET_OPT(ABI, "target ABI");
399
400	// We can tolerate different CPUs in many cases, notably when one CPU
401	// supports a strict superset of another. When allowing compatible
402	// differences skip this check.
403	if (!AllowCompatibleDifferences) {
404	CHECK_TARGET_OPT(CPU, "target CPU");
405	CHECK_TARGET_OPT(TuneCPU, "tune CPU");
406	}
407
408	#undef CHECK_TARGET_OPT
409
410	// Compare feature sets.
411	SmallVector<StringRef, 4> ExistingFeatures(
412	ExistingTargetOpts.FeaturesAsWritten.begin(),
413	ExistingTargetOpts.FeaturesAsWritten.end());
414	SmallVector<StringRef, 4> ReadFeatures(TargetOpts.FeaturesAsWritten.begin(),
415	TargetOpts.FeaturesAsWritten.end());
416	llvm::sort(C&: ExistingFeatures);
417	llvm::sort(C&: ReadFeatures);
418
419	// We compute the set difference in both directions explicitly so that we can
420	// diagnose the differences differently.
421	SmallVector<StringRef, 4> UnmatchedExistingFeatures, UnmatchedReadFeatures;
422	std::set_difference(
423	first1: ExistingFeatures.begin(), last1: ExistingFeatures.end(), first2: ReadFeatures.begin(),
424	last2: ReadFeatures.end(), result: std::back_inserter(x&: UnmatchedExistingFeatures));
425	std::set_difference(first1: ReadFeatures.begin(), last1: ReadFeatures.end(),
426	first2: ExistingFeatures.begin(), last2: ExistingFeatures.end(),
427	result: std::back_inserter(x&: UnmatchedReadFeatures));
428
429	// If we are allowing compatible differences and the read feature set is
430	// a strict subset of the existing feature set, there is nothing to diagnose.
431	if (AllowCompatibleDifferences && UnmatchedReadFeatures.empty())
432	return false;
433
434	if (Diags) {
435	for (StringRef Feature : UnmatchedReadFeatures)
436	Diags->Report(diag::err_pch_targetopt_feature_mismatch)
437	<< /* is-existing-feature */ false << Feature;
438	for (StringRef Feature : UnmatchedExistingFeatures)
439	Diags->Report(diag::err_pch_targetopt_feature_mismatch)
440	<< /* is-existing-feature */ true << Feature;
441	}
442
443	return !UnmatchedReadFeatures.empty() || !UnmatchedExistingFeatures.empty();
444	}
445
446	bool
447	PCHValidator::ReadLanguageOptions(const LangOptions &LangOpts,
448	bool Complain,
449	bool AllowCompatibleDifferences) {
450	const LangOptions &ExistingLangOpts = PP.getLangOpts();
451	return checkLanguageOptions(LangOpts, ExistingLangOpts,
452	Diags: Complain ? &Reader.Diags : nullptr,
453	AllowCompatibleDifferences);
454	}
455
456	bool PCHValidator::ReadTargetOptions(const TargetOptions &TargetOpts,
457	bool Complain,
458	bool AllowCompatibleDifferences) {
459	const TargetOptions &ExistingTargetOpts = PP.getTargetInfo().getTargetOpts();
460	return checkTargetOptions(TargetOpts, ExistingTargetOpts,
461	Diags: Complain ? &Reader.Diags : nullptr,
462	AllowCompatibleDifferences);
463	}
464
465	namespace {
466
467	using MacroDefinitionsMap =
468	llvm::StringMap<std::pair<StringRef, bool /*IsUndef*/>>;
469	using DeclsMap = llvm::DenseMap<DeclarationName, SmallVector<NamedDecl *, 8>>;
470
471	} // namespace
472
473	static bool checkDiagnosticGroupMappings(DiagnosticsEngine &StoredDiags,
474	DiagnosticsEngine &Diags,
475	bool Complain) {
476	using Level = DiagnosticsEngine::Level;
477
478	// Check current mappings for new -Werror mappings, and the stored mappings
479	// for cases that were explicitly mapped to *not* be errors that are now
480	// errors because of options like -Werror.
481	DiagnosticsEngine *MappingSources[] = { &Diags, &StoredDiags };
482
483	for (DiagnosticsEngine *MappingSource : MappingSources) {
484	for (auto DiagIDMappingPair : MappingSource->getDiagnosticMappings()) {
485	diag::kind DiagID = DiagIDMappingPair.first;
486	Level CurLevel = Diags.getDiagnosticLevel(DiagID, Loc: SourceLocation());
487	if (CurLevel < DiagnosticsEngine::Error)
488	continue; // not significant
489	Level StoredLevel =
490	StoredDiags.getDiagnosticLevel(DiagID, Loc: SourceLocation());
491	if (StoredLevel < DiagnosticsEngine::Error) {
492	if (Complain)
493	Diags.Report(diag::err_pch_diagopt_mismatch) << "-Werror=" +
494	Diags.getDiagnosticIDs()->getWarningOptionForDiag(DiagID).str();
495	return true;
496	}
497	}
498	}
499
500	return false;
501	}
502
503	static bool isExtHandlingFromDiagsError(DiagnosticsEngine &Diags) {
504	diag::Severity Ext = Diags.getExtensionHandlingBehavior();
505	if (Ext == diag::Severity::Warning && Diags.getWarningsAsErrors())
506	return true;
507	return Ext >= diag::Severity::Error;
508	}
509
510	static bool checkDiagnosticMappings(DiagnosticsEngine &StoredDiags,
511	DiagnosticsEngine &Diags, bool IsSystem,
512	bool SystemHeaderWarningsInModule,
513	bool Complain) {
514	// Top-level options
515	if (IsSystem) {
516	if (Diags.getSuppressSystemWarnings())
517	return false;
518	// If -Wsystem-headers was not enabled before, and it was not explicit,
519	// be conservative
520	if (StoredDiags.getSuppressSystemWarnings() &&
521	!SystemHeaderWarningsInModule) {
522	if (Complain)
523	Diags.Report(diag::err_pch_diagopt_mismatch) << "-Wsystem-headers";
524	return true;
525	}
526	}
527
528	if (Diags.getWarningsAsErrors() && !StoredDiags.getWarningsAsErrors()) {
529	if (Complain)
530	Diags.Report(diag::err_pch_diagopt_mismatch) << "-Werror";
531	return true;
532	}
533
534	if (Diags.getWarningsAsErrors() && Diags.getEnableAllWarnings() &&
535	!StoredDiags.getEnableAllWarnings()) {
536	if (Complain)
537	Diags.Report(diag::err_pch_diagopt_mismatch) << "-Weverything -Werror";
538	return true;
539	}
540
541	if (isExtHandlingFromDiagsError(Diags) &&
542	!isExtHandlingFromDiagsError(Diags&: StoredDiags)) {
543	if (Complain)
544	Diags.Report(diag::err_pch_diagopt_mismatch) << "-pedantic-errors";
545	return true;
546	}
547
548	return checkDiagnosticGroupMappings(StoredDiags, Diags, Complain);
549	}
550
551	/// Return the top import module if it is implicit, nullptr otherwise.
552	static Module *getTopImportImplicitModule(ModuleManager &ModuleMgr,
553	Preprocessor &PP) {
554	// If the original import came from a file explicitly generated by the user,
555	// don't check the diagnostic mappings.
556	// FIXME: currently this is approximated by checking whether this is not a
557	// module import of an implicitly-loaded module file.
558	// Note: ModuleMgr.rbegin() may not be the current module, but it must be in
559	// the transitive closure of its imports, since unrelated modules cannot be
560	// imported until after this module finishes validation.
561	ModuleFile *TopImport = &*ModuleMgr.rbegin();
562	while (!TopImport->ImportedBy.empty())
563	TopImport = TopImport->ImportedBy[0];
564	if (TopImport->Kind != MK_ImplicitModule)
565	return nullptr;
566
567	StringRef ModuleName = TopImport->ModuleName;
568	assert(!ModuleName.empty() && "diagnostic options read before module name");
569
570	Module *M =
571	PP.getHeaderSearchInfo().lookupModule(ModuleName, ImportLoc: TopImport->ImportLoc);
572	assert(M && "missing module");
573	return M;
574	}
575
576	bool PCHValidator::ReadDiagnosticOptions(
577	IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts, bool Complain) {
578	DiagnosticsEngine &ExistingDiags = PP.getDiagnostics();
579	IntrusiveRefCntPtr<DiagnosticIDs> DiagIDs(ExistingDiags.getDiagnosticIDs());
580	IntrusiveRefCntPtr<DiagnosticsEngine> Diags(
581	new DiagnosticsEngine(DiagIDs, DiagOpts.get()));
582	// This should never fail, because we would have processed these options
583	// before writing them to an ASTFile.
584	ProcessWarningOptions(Diags&: *Diags, Opts: *DiagOpts, /*Report*/ReportDiags: false);
585
586	ModuleManager &ModuleMgr = Reader.getModuleManager();
587	assert(ModuleMgr.size() >= 1 && "what ASTFile is this then");
588
589	Module *TopM = getTopImportImplicitModule(ModuleMgr, PP);
590	if (!TopM)
591	return false;
592
593	Module *Importer = PP.getCurrentModule();
594
595	DiagnosticOptions &ExistingOpts = ExistingDiags.getDiagnosticOptions();
596	bool SystemHeaderWarningsInModule =
597	Importer && llvm::is_contained(Range&: ExistingOpts.SystemHeaderWarningsModules,
598	Element: Importer->Name);
599
600	// FIXME: if the diagnostics are incompatible, save a DiagnosticOptions that
601	// contains the union of their flags.
602	return checkDiagnosticMappings(StoredDiags&: *Diags, Diags&: ExistingDiags, IsSystem: TopM->IsSystem,
603	SystemHeaderWarningsInModule, Complain);
604	}
605
606	/// Collect the macro definitions provided by the given preprocessor
607	/// options.
608	static void
609	collectMacroDefinitions(const PreprocessorOptions &PPOpts,
610	MacroDefinitionsMap &Macros,
611	SmallVectorImpl<StringRef> *MacroNames = nullptr) {
612	for (unsigned I = 0, N = PPOpts.Macros.size(); I != N; ++I) {
613	StringRef Macro = PPOpts.Macros[I].first;
614	bool IsUndef = PPOpts.Macros[I].second;
615
616	std::pair<StringRef, StringRef> MacroPair = Macro.split(Separator: '=');
617	StringRef MacroName = MacroPair.first;
618	StringRef MacroBody = MacroPair.second;
619
620	// For an #undef'd macro, we only care about the name.
621	if (IsUndef) {
622	if (MacroNames && !Macros.count(Key: MacroName))
623	MacroNames->push_back(Elt: MacroName);
624
625	Macros[MacroName] = std::make_pair(x: "", y: true);
626	continue;
627	}
628
629	// For a #define'd macro, figure out the actual definition.
630	if (MacroName.size() == Macro.size())
631	MacroBody = "1";
632	else {
633	// Note: GCC drops anything following an end-of-line character.
634	StringRef::size_type End = MacroBody.find_first_of(Chars: "\n\r");
635	MacroBody = MacroBody.substr(Start: 0, N: End);
636	}
637
638	if (MacroNames && !Macros.count(Key: MacroName))
639	MacroNames->push_back(Elt: MacroName);
640	Macros[MacroName] = std::make_pair(x&: MacroBody, y: false);
641	}
642	}
643
644	enum OptionValidation {
645	OptionValidateNone,
646	OptionValidateContradictions,
647	OptionValidateStrictMatches,
648	};
649
650	/// Check the preprocessor options deserialized from the control block
651	/// against the preprocessor options in an existing preprocessor.
652	///
653	/// \param Diags If non-null, produce diagnostics for any mismatches incurred.
654	/// \param Validation If set to OptionValidateNone, ignore differences in
655	/// preprocessor options. If set to OptionValidateContradictions,
656	/// require that options passed both in the AST file and on the command
657	/// line (-D or -U) match, but tolerate options missing in one or the
658	/// other. If set to OptionValidateContradictions, require that there
659	/// are no differences in the options between the two.
660	static bool checkPreprocessorOptions(
661	const PreprocessorOptions &PPOpts,
662	const PreprocessorOptions &ExistingPPOpts, bool ReadMacros,
663	DiagnosticsEngine *Diags, FileManager &FileMgr,
664	std::string &SuggestedPredefines, const LangOptions &LangOpts,
665	OptionValidation Validation = OptionValidateContradictions) {
666	if (ReadMacros) {
667	// Check macro definitions.
668	MacroDefinitionsMap ASTFileMacros;
669	collectMacroDefinitions(PPOpts, Macros&: ASTFileMacros);
670	MacroDefinitionsMap ExistingMacros;
671	SmallVector<StringRef, 4> ExistingMacroNames;
672	collectMacroDefinitions(PPOpts: ExistingPPOpts, Macros&: ExistingMacros,
673	MacroNames: &ExistingMacroNames);
674
675	// Use a line marker to enter the <command line> file, as the defines and
676	// undefines here will have come from the command line.
677	SuggestedPredefines += "# 1 \"<command line>\" 1\n";
678
679	for (unsigned I = 0, N = ExistingMacroNames.size(); I != N; ++I) {
680	// Dig out the macro definition in the existing preprocessor options.
681	StringRef MacroName = ExistingMacroNames[I];
682	std::pair<StringRef, bool> Existing = ExistingMacros[MacroName];
683
684	// Check whether we know anything about this macro name or not.
685	llvm::StringMap<std::pair<StringRef, bool /*IsUndef*/>>::iterator Known =
686	ASTFileMacros.find(Key: MacroName);
687	if (Validation == OptionValidateNone || Known == ASTFileMacros.end()) {
688	if (Validation == OptionValidateStrictMatches) {
689	// If strict matches are requested, don't tolerate any extra defines
690	// on the command line that are missing in the AST file.
691	if (Diags) {
692	Diags->Report(diag::err_pch_macro_def_undef) << MacroName << true;
693	}
694	return true;
695	}
696	// FIXME: Check whether this identifier was referenced anywhere in the
697	// AST file. If so, we should reject the AST file. Unfortunately, this
698	// information isn't in the control block. What shall we do about it?
699
700	if (Existing.second) {
701	SuggestedPredefines += "#undef ";
702	SuggestedPredefines += MacroName.str();
703	SuggestedPredefines += '\n';
704	} else {
705	SuggestedPredefines += "#define ";
706	SuggestedPredefines += MacroName.str();
707	SuggestedPredefines += ' ';
708	SuggestedPredefines += Existing.first.str();
709	SuggestedPredefines += '\n';
710	}
711	continue;
712	}
713
714	// If the macro was defined in one but undef'd in the other, we have a
715	// conflict.
716	if (Existing.second != Known->second.second) {
717	if (Diags) {
718	Diags->Report(diag::err_pch_macro_def_undef)
719	<< MacroName << Known->second.second;
720	}
721	return true;
722	}
723
724	// If the macro was #undef'd in both, or if the macro bodies are
725	// identical, it's fine.
726	if (Existing.second || Existing.first == Known->second.first) {
727	ASTFileMacros.erase(I: Known);
728	continue;
729	}
730
731	// The macro bodies differ; complain.
732	if (Diags) {
733	Diags->Report(diag::err_pch_macro_def_conflict)
734	<< MacroName << Known->second.first << Existing.first;
735	}
736	return true;
737	}
738
739	// Leave the <command line> file and return to <built-in>.
740	SuggestedPredefines += "# 1 \"<built-in>\" 2\n";
741
742	if (Validation == OptionValidateStrictMatches) {
743	// If strict matches are requested, don't tolerate any extra defines in
744	// the AST file that are missing on the command line.
745	for (const auto &MacroName : ASTFileMacros.keys()) {
746	if (Diags) {
747	Diags->Report(diag::err_pch_macro_def_undef) << MacroName << false;
748	}
749	return true;
750	}
751	}
752	}
753
754	// Check whether we're using predefines.
755	if (PPOpts.UsePredefines != ExistingPPOpts.UsePredefines &&
756	Validation != OptionValidateNone) {
757	if (Diags) {
758	Diags->Report(diag::err_pch_undef) << ExistingPPOpts.UsePredefines;
759	}
760	return true;
761	}
762
763	// Detailed record is important since it is used for the module cache hash.
764	if (LangOpts.Modules &&
765	PPOpts.DetailedRecord != ExistingPPOpts.DetailedRecord &&
766	Validation != OptionValidateNone) {
767	if (Diags) {
768	Diags->Report(diag::err_pch_pp_detailed_record) << PPOpts.DetailedRecord;
769	}
770	return true;
771	}
772
773	// Compute the #include and #include_macros lines we need.
774	for (unsigned I = 0, N = ExistingPPOpts.Includes.size(); I != N; ++I) {
775	StringRef File = ExistingPPOpts.Includes[I];
776
777	if (!ExistingPPOpts.ImplicitPCHInclude.empty() &&
778	!ExistingPPOpts.PCHThroughHeader.empty()) {
779	// In case the through header is an include, we must add all the includes
780	// to the predefines so the start point can be determined.
781	SuggestedPredefines += "#include \"";
782	SuggestedPredefines += File;
783	SuggestedPredefines += "\"\n";
784	continue;
785	}
786
787	if (File == ExistingPPOpts.ImplicitPCHInclude)
788	continue;
789
790	if (llvm::is_contained(Range: PPOpts.Includes, Element: File))
791	continue;
792
793	SuggestedPredefines += "#include \"";
794	SuggestedPredefines += File;
795	SuggestedPredefines += "\"\n";
796	}
797
798	for (unsigned I = 0, N = ExistingPPOpts.MacroIncludes.size(); I != N; ++I) {
799	StringRef File = ExistingPPOpts.MacroIncludes[I];
800	if (llvm::is_contained(Range: PPOpts.MacroIncludes, Element: File))
801	continue;
802
803	SuggestedPredefines += "#__include_macros \"";
804	SuggestedPredefines += File;
805	SuggestedPredefines += "\"\n##\n";
806	}
807
808	return false;
809	}
810
811	bool PCHValidator::ReadPreprocessorOptions(const PreprocessorOptions &PPOpts,
812	bool ReadMacros, bool Complain,
813	std::string &SuggestedPredefines) {
814	const PreprocessorOptions &ExistingPPOpts = PP.getPreprocessorOpts();
815
816	return checkPreprocessorOptions(
817	PPOpts, ExistingPPOpts, ReadMacros, Diags: Complain ? &Reader.Diags : nullptr,
818	FileMgr&: PP.getFileManager(), SuggestedPredefines, LangOpts: PP.getLangOpts());
819	}
820
821	bool SimpleASTReaderListener::ReadPreprocessorOptions(
822	const PreprocessorOptions &PPOpts, bool ReadMacros, bool Complain,
823	std::string &SuggestedPredefines) {
824	return checkPreprocessorOptions(PPOpts, ExistingPPOpts: PP.getPreprocessorOpts(), ReadMacros,
825	Diags: nullptr, FileMgr&: PP.getFileManager(),
826	SuggestedPredefines, LangOpts: PP.getLangOpts(),
827	Validation: OptionValidateNone);
828	}
829
830	/// Check the header search options deserialized from the control block
831	/// against the header search options in an existing preprocessor.
832	///
833	/// \param Diags If non-null, produce diagnostics for any mismatches incurred.
834	static bool checkHeaderSearchOptions(const HeaderSearchOptions &HSOpts,
835	StringRef SpecificModuleCachePath,
836	StringRef ExistingModuleCachePath,
837	DiagnosticsEngine *Diags,
838	const LangOptions &LangOpts,
839	const PreprocessorOptions &PPOpts) {
840	if (LangOpts.Modules) {
841	if (SpecificModuleCachePath != ExistingModuleCachePath &&
842	!PPOpts.AllowPCHWithDifferentModulesCachePath) {
843	if (Diags)
844	Diags->Report(diag::err_pch_modulecache_mismatch)
845	<< SpecificModuleCachePath << ExistingModuleCachePath;
846	return true;
847	}
848	}
849
850	return false;
851	}
852
853	bool PCHValidator::ReadHeaderSearchOptions(const HeaderSearchOptions &HSOpts,
854	StringRef SpecificModuleCachePath,
855	bool Complain) {
856	return checkHeaderSearchOptions(HSOpts, SpecificModuleCachePath,
857	ExistingModuleCachePath: PP.getHeaderSearchInfo().getModuleCachePath(),
858	Diags: Complain ? &Reader.Diags : nullptr,
859	LangOpts: PP.getLangOpts(), PPOpts: PP.getPreprocessorOpts());
860	}
861
862	void PCHValidator::ReadCounter(const ModuleFile &M, unsigned Value) {
863	PP.setCounterValue(Value);
864	}
865
866	//===----------------------------------------------------------------------===//
867	// AST reader implementation
868	//===----------------------------------------------------------------------===//
869
870	static uint64_t readULEB(const unsigned char *&P) {
871	unsigned Length = 0;
872	const char *Error = nullptr;
873
874	uint64_t Val = llvm::decodeULEB128(p: P, n: &Length, end: nullptr, error: &Error);
875	if (Error)
876	llvm::report_fatal_error(reason: Error);
877	P += Length;
878	return Val;
879	}
880
881	/// Read ULEB-encoded key length and data length.
882	static std::pair<unsigned, unsigned>
883	readULEBKeyDataLength(const unsigned char *&P) {
884	unsigned KeyLen = readULEB(P);
885	if ((unsigned)KeyLen != KeyLen)
886	llvm::report_fatal_error(reason: "key too large");
887
888	unsigned DataLen = readULEB(P);
889	if ((unsigned)DataLen != DataLen)
890	llvm::report_fatal_error(reason: "data too large");
891
892	return std::make_pair(x&: KeyLen, y&: DataLen);
893	}
894
895	void ASTReader::setDeserializationListener(ASTDeserializationListener *Listener,
896	bool TakeOwnership) {
897	DeserializationListener = Listener;
898	OwnsDeserializationListener = TakeOwnership;
899	}
900
901	unsigned ASTSelectorLookupTrait::ComputeHash(Selector Sel) {
902	return serialization::ComputeHash(Sel);
903	}
904
905	std::pair<unsigned, unsigned>
906	ASTSelectorLookupTrait::ReadKeyDataLength(const unsigned char*& d) {
907	return readULEBKeyDataLength(P&: d);
908	}
909
910	ASTSelectorLookupTrait::internal_key_type
911	ASTSelectorLookupTrait::ReadKey(const unsigned char* d, unsigned) {
912	using namespace llvm::support;
913
914	SelectorTable &SelTable = Reader.getContext().Selectors;
915	unsigned N =
916	endian::readNext<uint16_t, llvm::endianness::little, unaligned>(memory&: d);
917	IdentifierInfo *FirstII = Reader.getLocalIdentifier(
918	M&: F, LocalID: endian::readNext<uint32_t, llvm::endianness::little, unaligned>(memory&: d));
919	if (N == 0)
920	return SelTable.getNullarySelector(ID: FirstII);
921	else if (N == 1)
922	return SelTable.getUnarySelector(ID: FirstII);
923
924	SmallVector<IdentifierInfo *, 16> Args;
925	Args.push_back(Elt: FirstII);
926	for (unsigned I = 1; I != N; ++I)
927	Args.push_back(Elt: Reader.getLocalIdentifier(
928	M&: F, LocalID: endian::readNext<uint32_t, llvm::endianness::little, unaligned>(memory&: d)));
929
930	return SelTable.getSelector(NumArgs: N, IIV: Args.data());
931	}
932
933	ASTSelectorLookupTrait::data_type
934	ASTSelectorLookupTrait::ReadData(Selector, const unsigned char* d,
935	unsigned DataLen) {
936	using namespace llvm::support;
937
938	data_type Result;
939
940	Result.ID = Reader.getGlobalSelectorID(
941	M&: F, LocalID: endian::readNext<uint32_t, llvm::endianness::little, unaligned>(memory&: d));
942	unsigned FullInstanceBits =
943	endian::readNext<uint16_t, llvm::endianness::little, unaligned>(memory&: d);
944	unsigned FullFactoryBits =
945	endian::readNext<uint16_t, llvm::endianness::little, unaligned>(memory&: d);
946	Result.InstanceBits = FullInstanceBits & 0x3;
947	Result.InstanceHasMoreThanOneDecl = (FullInstanceBits >> 2) & 0x1;
948	Result.FactoryBits = FullFactoryBits & 0x3;
949	Result.FactoryHasMoreThanOneDecl = (FullFactoryBits >> 2) & 0x1;
950	unsigned NumInstanceMethods = FullInstanceBits >> 3;
951	unsigned NumFactoryMethods = FullFactoryBits >> 3;
952
953	// Load instance methods
954	for (unsigned I = 0; I != NumInstanceMethods; ++I) {
955	if (ObjCMethodDecl *Method = Reader.GetLocalDeclAs<ObjCMethodDecl>(
956	F,
957	LocalID: endian::readNext<uint32_t, llvm::endianness::little, unaligned>(memory&: d)))
958	Result.Instance.push_back(Elt: Method);
959	}
960
961	// Load factory methods
962	for (unsigned I = 0; I != NumFactoryMethods; ++I) {
963	if (ObjCMethodDecl *Method = Reader.GetLocalDeclAs<ObjCMethodDecl>(
964	F,
965	LocalID: endian::readNext<uint32_t, llvm::endianness::little, unaligned>(memory&: d)))
966	Result.Factory.push_back(Elt: Method);
967	}
968
969	return Result;
970	}
971
972	unsigned ASTIdentifierLookupTraitBase::ComputeHash(const internal_key_type& a) {
973	return llvm::djbHash(Buffer: a);
974	}
975
976	std::pair<unsigned, unsigned>
977	ASTIdentifierLookupTraitBase::ReadKeyDataLength(const unsigned char*& d) {
978	return readULEBKeyDataLength(P&: d);
979	}
980
981	ASTIdentifierLookupTraitBase::internal_key_type
982	ASTIdentifierLookupTraitBase::ReadKey(const unsigned char* d, unsigned n) {
983	assert(n >= 2 && d[n-1] == '\0');
984	return StringRef((const char*) d, n-1);
985	}
986
987	/// Whether the given identifier is "interesting".
988	static bool isInterestingIdentifier(ASTReader &Reader, IdentifierInfo &II,
989	bool IsModule) {
990	bool IsInteresting =
991	II.getNotableIdentifierID() != tok::NotableIdentifierKind::not_notable ||
992	II.getBuiltinID() != Builtin::ID::NotBuiltin ||
993	II.getObjCKeywordID() != tok::ObjCKeywordKind::objc_not_keyword;
994	return II.hadMacroDefinition() || II.isPoisoned() ||
995	(!IsModule && IsInteresting) || II.hasRevertedTokenIDToIdentifier() ||
996	(!(IsModule && Reader.getPreprocessor().getLangOpts().CPlusPlus) &&
997	II.getFETokenInfo());
998	}
999
1000	static bool readBit(unsigned &Bits) {
1001	bool Value = Bits & 0x1;
1002	Bits >>= 1;
1003	return Value;
1004	}
1005
1006	IdentID ASTIdentifierLookupTrait::ReadIdentifierID(const unsigned char *d) {
1007	using namespace llvm::support;
1008
1009	unsigned RawID =
1010	endian::readNext<uint32_t, llvm::endianness::little, unaligned>(memory&: d);
1011	return Reader.getGlobalIdentifierID(M&: F, LocalID: RawID >> 1);
1012	}
1013
1014	static void markIdentifierFromAST(ASTReader &Reader, IdentifierInfo &II) {
1015	if (!II.isFromAST()) {
1016	II.setIsFromAST();
1017	bool IsModule = Reader.getPreprocessor().getCurrentModule() != nullptr;
1018	if (isInterestingIdentifier(Reader, II, IsModule))
1019	II.setChangedSinceDeserialization();
1020	}
1021	}
1022
1023	IdentifierInfo *ASTIdentifierLookupTrait::ReadData(const internal_key_type& k,
1024	const unsigned char* d,
1025	unsigned DataLen) {
1026	using namespace llvm::support;
1027
1028	unsigned RawID =
1029	endian::readNext<uint32_t, llvm::endianness::little, unaligned>(memory&: d);
1030	bool IsInteresting = RawID & 0x01;
1031
1032	// Wipe out the "is interesting" bit.
1033	RawID = RawID >> 1;
1034
1035	// Build the IdentifierInfo and link the identifier ID with it.
1036	IdentifierInfo *II = KnownII;
1037	if (!II) {
1038	II = &Reader.getIdentifierTable().getOwn(Name: k);
1039	KnownII = II;
1040	}
1041	markIdentifierFromAST(Reader, II&: *II);
1042	Reader.markIdentifierUpToDate(II);
1043
1044	IdentID ID = Reader.getGlobalIdentifierID(M&: F, LocalID: RawID);
1045	if (!IsInteresting) {
1046	// For uninteresting identifiers, there's nothing else to do. Just notify
1047	// the reader that we've finished loading this identifier.
1048	Reader.SetIdentifierInfo(ID, II);
1049	return II;
1050	}
1051
1052	unsigned ObjCOrBuiltinID =
1053	endian::readNext<uint16_t, llvm::endianness::little, unaligned>(memory&: d);
1054	unsigned Bits =
1055	endian::readNext<uint16_t, llvm::endianness::little, unaligned>(memory&: d);
1056	bool CPlusPlusOperatorKeyword = readBit(Bits);
1057	bool HasRevertedTokenIDToIdentifier = readBit(Bits);
1058	bool Poisoned = readBit(Bits);
1059	bool ExtensionToken = readBit(Bits);
1060	bool HadMacroDefinition = readBit(Bits);
1061
1062	assert(Bits == 0 && "Extra bits in the identifier?");
1063	DataLen -= 8;
1064
1065	// Set or check the various bits in the IdentifierInfo structure.
1066	// Token IDs are read-only.
1067	if (HasRevertedTokenIDToIdentifier && II->getTokenID() != tok::identifier)
1068	II->revertTokenIDToIdentifier();
1069	if (!F.isModule())
1070	II->setObjCOrBuiltinID(ObjCOrBuiltinID);
1071	assert(II->isExtensionToken() == ExtensionToken &&
1072	"Incorrect extension token flag");
1073	(void)ExtensionToken;
1074	if (Poisoned)
1075	II->setIsPoisoned(true);
1076	assert(II->isCPlusPlusOperatorKeyword() == CPlusPlusOperatorKeyword &&
1077	"Incorrect C++ operator keyword flag");
1078	(void)CPlusPlusOperatorKeyword;
1079
1080	// If this identifier is a macro, deserialize the macro
1081	// definition.
1082	if (HadMacroDefinition) {
1083	uint32_t MacroDirectivesOffset =
1084	endian::readNext<uint32_t, llvm::endianness::little, unaligned>(memory&: d);
1085	DataLen -= 4;
1086
1087	Reader.addPendingMacro(II, M: &F, MacroDirectivesOffset);
1088	}
1089
1090	Reader.SetIdentifierInfo(ID, II);
1091
1092	// Read all of the declarations visible at global scope with this
1093	// name.
1094	if (DataLen > 0) {
1095	SmallVector<uint32_t, 4> DeclIDs;
1096	for (; DataLen > 0; DataLen -= 4)
1097	DeclIDs.push_back(Elt: Reader.getGlobalDeclID(
1098	F,
1099	LocalID: endian::readNext<uint32_t, llvm::endianness::little, unaligned>(memory&: d)));
1100	Reader.SetGloballyVisibleDecls(II, DeclIDs);
1101	}
1102
1103	return II;
1104	}
1105
1106	DeclarationNameKey::DeclarationNameKey(DeclarationName Name)
1107	: Kind(Name.getNameKind()) {
1108	switch (Kind) {
1109	case DeclarationName::Identifier:
1110	Data = (uint64_t)Name.getAsIdentifierInfo();
1111	break;
1112	case DeclarationName::ObjCZeroArgSelector:
1113	case DeclarationName::ObjCOneArgSelector:
1114	case DeclarationName::ObjCMultiArgSelector:
1115	Data = (uint64_t)Name.getObjCSelector().getAsOpaquePtr();
1116	break;
1117	case DeclarationName::CXXOperatorName:
1118	Data = Name.getCXXOverloadedOperator();
1119	break;
1120	case DeclarationName::CXXLiteralOperatorName:
1121	Data = (uint64_t)Name.getCXXLiteralIdentifier();
1122	break;
1123	case DeclarationName::CXXDeductionGuideName:
1124	Data = (uint64_t)Name.getCXXDeductionGuideTemplate()
1125	->getDeclName().getAsIdentifierInfo();
1126	break;
1127	case DeclarationName::CXXConstructorName:
1128	case DeclarationName::CXXDestructorName:
1129	case DeclarationName::CXXConversionFunctionName:
1130	case DeclarationName::CXXUsingDirective:
1131	Data = 0;
1132	break;
1133	}
1134	}
1135
1136	unsigned DeclarationNameKey::getHash() const {
1137	llvm::FoldingSetNodeID ID;
1138	ID.AddInteger(I: Kind);
1139
1140	switch (Kind) {
1141	case DeclarationName::Identifier:
1142	case DeclarationName::CXXLiteralOperatorName:
1143	case DeclarationName::CXXDeductionGuideName:
1144	ID.AddString(String: ((IdentifierInfo*)Data)->getName());
1145	break;
1146	case DeclarationName::ObjCZeroArgSelector:
1147	case DeclarationName::ObjCOneArgSelector:
1148	case DeclarationName::ObjCMultiArgSelector:
1149	ID.AddInteger(I: serialization::ComputeHash(Sel: Selector(Data)));
1150	break;
1151	case DeclarationName::CXXOperatorName:
1152	ID.AddInteger(I: (OverloadedOperatorKind)Data);
1153	break;
1154	case DeclarationName::CXXConstructorName:
1155	case DeclarationName::CXXDestructorName:
1156	case DeclarationName::CXXConversionFunctionName:
1157	case DeclarationName::CXXUsingDirective:
1158	break;
1159	}
1160
1161	return ID.ComputeHash();
1162	}
1163
1164	ModuleFile *
1165	ASTDeclContextNameLookupTrait::ReadFileRef(const unsigned char *&d) {
1166	using namespace llvm::support;
1167
1168	uint32_t ModuleFileID =
1169	endian::readNext<uint32_t, llvm::endianness::little, unaligned>(memory&: d);
1170	return Reader.getLocalModuleFile(M&: F, ID: ModuleFileID);
1171	}
1172
1173	std::pair<unsigned, unsigned>
1174	ASTDeclContextNameLookupTrait::ReadKeyDataLength(const unsigned char *&d) {
1175	return readULEBKeyDataLength(P&: d);
1176	}
1177
1178	ASTDeclContextNameLookupTrait::internal_key_type
1179	ASTDeclContextNameLookupTrait::ReadKey(const unsigned char *d, unsigned) {
1180	using namespace llvm::support;
1181
1182	auto Kind = (DeclarationName::NameKind)*d++;
1183	uint64_t Data;
1184	switch (Kind) {
1185	case DeclarationName::Identifier:
1186	case DeclarationName::CXXLiteralOperatorName:
1187	case DeclarationName::CXXDeductionGuideName:
1188	Data = (uint64_t)Reader.getLocalIdentifier(
1189	M&: F, LocalID: endian::readNext<uint32_t, llvm::endianness::little, unaligned>(memory&: d));
1190	break;
1191	case DeclarationName::ObjCZeroArgSelector:
1192	case DeclarationName::ObjCOneArgSelector:
1193	case DeclarationName::ObjCMultiArgSelector:
1194	Data =
1195	(uint64_t)Reader
1196	.getLocalSelector(
1197	M&: F,
1198	LocalID: endian::readNext<uint32_t, llvm::endianness::little, unaligned>(
1199	memory&: d))
1200	.getAsOpaquePtr();
1201	break;
1202	case DeclarationName::CXXOperatorName:
1203	Data = *d++; // OverloadedOperatorKind
1204	break;
1205	case DeclarationName::CXXConstructorName:
1206	case DeclarationName::CXXDestructorName:
1207	case DeclarationName::CXXConversionFunctionName:
1208	case DeclarationName::CXXUsingDirective:
1209	Data = 0;
1210	break;
1211	}
1212
1213	return DeclarationNameKey(Kind, Data);
1214	}
1215
1216	void ASTDeclContextNameLookupTrait::ReadDataInto(internal_key_type,
1217	const unsigned char *d,
1218	unsigned DataLen,
1219	data_type_builder &Val) {
1220	using namespace llvm::support;
1221
1222	for (unsigned NumDecls = DataLen / 4; NumDecls; --NumDecls) {
1223	uint32_t LocalID =
1224	endian::readNext<uint32_t, llvm::endianness::little, unaligned>(memory&: d);
1225	Val.insert(ID: Reader.getGlobalDeclID(F, LocalID));
1226	}
1227	}
1228
1229	bool ASTReader::ReadLexicalDeclContextStorage(ModuleFile &M,
1230	BitstreamCursor &Cursor,
1231	uint64_t Offset,
1232	DeclContext *DC) {
1233	assert(Offset != 0);
1234
1235	SavedStreamPosition SavedPosition(Cursor);
1236	if (llvm::Error Err = Cursor.JumpToBit(BitNo: Offset)) {
1237	Error(Err: std::move(Err));
1238	return true;
1239	}
1240
1241	RecordData Record;
1242	StringRef Blob;
1243	Expected<unsigned> MaybeCode = Cursor.ReadCode();
1244	if (!MaybeCode) {
1245	Error(Err: MaybeCode.takeError());
1246	return true;
1247	}
1248	unsigned Code = MaybeCode.get();
1249
1250	Expected<unsigned> MaybeRecCode = Cursor.readRecord(AbbrevID: Code, Vals&: Record, Blob: &Blob);
1251	if (!MaybeRecCode) {
1252	Error(Err: MaybeRecCode.takeError());
1253	return true;
1254	}
1255	unsigned RecCode = MaybeRecCode.get();
1256	if (RecCode != DECL_CONTEXT_LEXICAL) {
1257	Error(Msg: "Expected lexical block");
1258	return true;
1259	}
1260
1261	assert(!isa<TranslationUnitDecl>(DC) &&
1262	"expected a TU_UPDATE_LEXICAL record for TU");
1263	// If we are handling a C++ class template instantiation, we can see multiple
1264	// lexical updates for the same record. It's important that we select only one
1265	// of them, so that field numbering works properly. Just pick the first one we
1266	// see.
1267	auto &Lex = LexicalDecls[DC];
1268	if (!Lex.first) {
1269	Lex = std::make_pair(
1270	x: &M, y: llvm::ArrayRef(
1271	reinterpret_cast<const llvm::support::unaligned_uint32_t *>(
1272	Blob.data()),
1273	Blob.size() / 4));
1274	}
1275	DC->setHasExternalLexicalStorage(true);
1276	return false;
1277	}
1278
1279	bool ASTReader::ReadVisibleDeclContextStorage(ModuleFile &M,
1280	BitstreamCursor &Cursor,
1281	uint64_t Offset,
1282	DeclID ID) {
1283	assert(Offset != 0);
1284
1285	SavedStreamPosition SavedPosition(Cursor);
1286	if (llvm::Error Err = Cursor.JumpToBit(BitNo: Offset)) {
1287	Error(Err: std::move(Err));
1288	return true;
1289	}
1290
1291	RecordData Record;
1292	StringRef Blob;
1293	Expected<unsigned> MaybeCode = Cursor.ReadCode();
1294	if (!MaybeCode) {
1295	Error(Err: MaybeCode.takeError());
1296	return true;
1297	}
1298	unsigned Code = MaybeCode.get();
1299
1300	Expected<unsigned> MaybeRecCode = Cursor.readRecord(AbbrevID: Code, Vals&: Record, Blob: &Blob);
1301	if (!MaybeRecCode) {
1302	Error(Err: MaybeRecCode.takeError());
1303	return true;
1304	}
1305	unsigned RecCode = MaybeRecCode.get();
1306	if (RecCode != DECL_CONTEXT_VISIBLE) {
1307	Error(Msg: "Expected visible lookup table block");
1308	return true;
1309	}
1310
1311	// We can't safely determine the primary context yet, so delay attaching the
1312	// lookup table until we're done with recursive deserialization.
1313	auto *Data = (const unsigned char*)Blob.data();
1314	PendingVisibleUpdates[ID].push_back(Elt: PendingVisibleUpdate{.Mod: &M, .Data: Data});
1315	return false;
1316	}
1317
1318	void ASTReader::Error(StringRef Msg) const {
1319	Error(diag::err_fe_pch_malformed, Msg);
1320	if (PP.getLangOpts().Modules && !Diags.isDiagnosticInFlight() &&
1321	!PP.getHeaderSearchInfo().getModuleCachePath().empty()) {
1322	Diag(diag::note_module_cache_path)
1323	<< PP.getHeaderSearchInfo().getModuleCachePath();
1324	}
1325	}
1326
1327	void ASTReader::Error(unsigned DiagID, StringRef Arg1, StringRef Arg2,
1328	StringRef Arg3) const {
1329	if (Diags.isDiagnosticInFlight())
1330	Diags.SetDelayedDiagnostic(DiagID, Arg1, Arg2, Arg3);
1331	else
1332	Diag(DiagID) << Arg1 << Arg2 << Arg3;
1333	}
1334
1335	void ASTReader::Error(llvm::Error &&Err) const {
1336	llvm::Error RemainingErr =
1337	handleErrors(E: std::move(Err), Hs: [this](const DiagnosticError &E) {
1338	auto Diag = E.getDiagnostic().second;
1339
1340	// Ideally we'd just emit it, but have to handle a possible in-flight
1341	// diagnostic. Note that the location is currently ignored as well.
1342	auto NumArgs = Diag.getStorage()->NumDiagArgs;
1343	assert(NumArgs <= 3 && "Can only have up to 3 arguments");
1344	StringRef Arg1, Arg2, Arg3;
1345	switch (NumArgs) {
1346	case 3:
1347	Arg3 = Diag.getStringArg(I: 2);
1348	[[fallthrough]];
1349	case 2:
1350	Arg2 = Diag.getStringArg(I: 1);
1351	[[fallthrough]];
1352	case 1:
1353	Arg1 = Diag.getStringArg(I: 0);
1354	}
1355	Error(DiagID: Diag.getDiagID(), Arg1, Arg2, Arg3);
1356	});
1357	if (RemainingErr)
1358	Error(Msg: toString(E: std::move(RemainingErr)));
1359	}
1360
1361	//===----------------------------------------------------------------------===//
1362	// Source Manager Deserialization
1363	//===----------------------------------------------------------------------===//
1364
1365	/// Read the line table in the source manager block.
1366	void ASTReader::ParseLineTable(ModuleFile &F, const RecordData &Record) {
1367	unsigned Idx = 0;
1368	LineTableInfo &LineTable = SourceMgr.getLineTable();
1369
1370	// Parse the file names
1371	std::map<int, int> FileIDs;
1372	FileIDs[-1] = -1; // For unspecified filenames.
1373	for (unsigned I = 0; Record[Idx]; ++I) {
1374	// Extract the file name
1375	auto Filename = ReadPath(F, Record, Idx);
1376	FileIDs[I] = LineTable.getLineTableFilenameID(Str: Filename);
1377	}
1378	++Idx;
1379
1380	// Parse the line entries
1381	std::vector<LineEntry> Entries;
1382	while (Idx < Record.size()) {
1383	FileID FID = ReadFileID(F, Record, Idx);
1384
1385	// Extract the line entries
1386	unsigned NumEntries = Record[Idx++];
1387	assert(NumEntries && "no line entries for file ID");
1388	Entries.clear();
1389	Entries.reserve(n: NumEntries);
1390	for (unsigned I = 0; I != NumEntries; ++I) {
1391	unsigned FileOffset = Record[Idx++];
1392	unsigned LineNo = Record[Idx++];
1393	int FilenameID = FileIDs[Record[Idx++]];
1394	SrcMgr::CharacteristicKind FileKind
1395	= (SrcMgr::CharacteristicKind)Record[Idx++];
1396	unsigned IncludeOffset = Record[Idx++];
1397	Entries.push_back(x: LineEntry::get(Offs: FileOffset, Line: LineNo, Filename: FilenameID,
1398	FileKind, IncludeOffset));
1399	}
1400	LineTable.AddEntry(FID, Entries);
1401	}
1402	}
1403
1404	/// Read a source manager block
1405	llvm::Error ASTReader::ReadSourceManagerBlock(ModuleFile &F) {
1406	using namespace SrcMgr;
1407
1408	BitstreamCursor &SLocEntryCursor = F.SLocEntryCursor;
1409
1410	// Set the source-location entry cursor to the current position in
1411	// the stream. This cursor will be used to read the contents of the
1412	// source manager block initially, and then lazily read
1413	// source-location entries as needed.
1414	SLocEntryCursor = F.Stream;
1415
1416	// The stream itself is going to skip over the source manager block.
1417	if (llvm::Error Err = F.Stream.SkipBlock())
1418	return Err;
1419
1420	// Enter the source manager block.
1421	if (llvm::Error Err = SLocEntryCursor.EnterSubBlock(BlockID: SOURCE_MANAGER_BLOCK_ID))
1422	return Err;
1423	F.SourceManagerBlockStartOffset = SLocEntryCursor.GetCurrentBitNo();
1424
1425	RecordData Record;
1426	while (true) {
1427	Expected<llvm::BitstreamEntry> MaybeE =
1428	SLocEntryCursor.advanceSkippingSubblocks();
1429	if (!MaybeE)
1430	return MaybeE.takeError();
1431	llvm::BitstreamEntry E = MaybeE.get();
1432
1433	switch (E.Kind) {
1434	case llvm::BitstreamEntry::SubBlock: // Handled for us already.
1435	case llvm::BitstreamEntry::Error:
1436	return llvm::createStringError(EC: std::errc::illegal_byte_sequence,
1437	Fmt: "malformed block record in AST file");
1438	case llvm::BitstreamEntry::EndBlock:
1439	return llvm::Error::success();
1440	case llvm::BitstreamEntry::Record:
1441	// The interesting case.
1442	break;
1443	}
1444
1445	// Read a record.
1446	Record.clear();
1447	StringRef Blob;
1448	Expected<unsigned> MaybeRecord =
1449	SLocEntryCursor.readRecord(AbbrevID: E.ID, Vals&: Record, Blob: &Blob);
1450	if (!MaybeRecord)
1451	return MaybeRecord.takeError();
1452	switch (MaybeRecord.get()) {
1453	default: // Default behavior: ignore.
1454	break;
1455
1456	case SM_SLOC_FILE_ENTRY:
1457	case SM_SLOC_BUFFER_ENTRY:
1458	case SM_SLOC_EXPANSION_ENTRY:
1459	// Once we hit one of the source location entries, we're done.
1460	return llvm::Error::success();
1461	}
1462	}
1463	}
1464
1465	llvm::Expected<SourceLocation::UIntTy>
1466	ASTReader::readSLocOffset(ModuleFile *F, unsigned Index) {
1467	BitstreamCursor &Cursor = F->SLocEntryCursor;
1468	SavedStreamPosition SavedPosition(Cursor);
1469	if (llvm::Error Err = Cursor.JumpToBit(BitNo: F->SLocEntryOffsetsBase +
1470	F->SLocEntryOffsets[Index]))
1471	return std::move(Err);
1472
1473	Expected<llvm::BitstreamEntry> MaybeEntry = Cursor.advance();
1474	if (!MaybeEntry)
1475	return MaybeEntry.takeError();
1476
1477	llvm::BitstreamEntry Entry = MaybeEntry.get();
1478	if (Entry.Kind != llvm::BitstreamEntry::Record)
1479	return llvm::createStringError(
1480	EC: std::errc::illegal_byte_sequence,
1481	Fmt: "incorrectly-formatted source location entry in AST file");
1482
1483	RecordData Record;
1484	StringRef Blob;
1485	Expected<unsigned> MaybeSLOC = Cursor.readRecord(AbbrevID: Entry.ID, Vals&: Record, Blob: &Blob);
1486	if (!MaybeSLOC)
1487	return MaybeSLOC.takeError();
1488
1489	switch (MaybeSLOC.get()) {
1490	default:
1491	return llvm::createStringError(
1492	EC: std::errc::illegal_byte_sequence,
1493	Fmt: "incorrectly-formatted source location entry in AST file");
1494	case SM_SLOC_FILE_ENTRY:
1495	case SM_SLOC_BUFFER_ENTRY:
1496	case SM_SLOC_EXPANSION_ENTRY:
1497	return F->SLocEntryBaseOffset + Record[0];
1498	}
1499	}
1500
1501	int ASTReader::getSLocEntryID(SourceLocation::UIntTy SLocOffset) {
1502	auto SLocMapI =
1503	GlobalSLocOffsetMap.find(K: SourceManager::MaxLoadedOffset - SLocOffset - 1);
1504	assert(SLocMapI != GlobalSLocOffsetMap.end() &&
1505	"Corrupted global sloc offset map");
1506	ModuleFile *F = SLocMapI->second;
1507
1508	bool Invalid = false;
1509
1510	auto It = llvm::upper_bound(
1511	Range: llvm::index_range(0, F->LocalNumSLocEntries), Value&: SLocOffset,
1512	C: [&](SourceLocation::UIntTy Offset, std::size_t LocalIndex) {
1513	int ID = F->SLocEntryBaseID + LocalIndex;
1514	std::size_t Index = -ID - 2;
1515	if (!SourceMgr.SLocEntryOffsetLoaded[Index]) {
1516	assert(!SourceMgr.SLocEntryLoaded[Index]);
1517	auto MaybeEntryOffset = readSLocOffset(F, Index: LocalIndex);
1518	if (!MaybeEntryOffset) {
1519	Error(Err: MaybeEntryOffset.takeError());
1520	Invalid = true;
1521	return true;
1522	}
1523	SourceMgr.LoadedSLocEntryTable[Index] =
1524	SrcMgr::SLocEntry::getOffsetOnly(Offset: *MaybeEntryOffset);
1525	SourceMgr.SLocEntryOffsetLoaded[Index] = true;
1526	}
1527	return Offset < SourceMgr.LoadedSLocEntryTable[Index].getOffset();
1528	});
1529
1530	if (Invalid)
1531	return 0;
1532
1533	// The iterator points to the first entry with start offset greater than the
1534	// offset of interest. The previous entry must contain the offset of interest.
1535	return F->SLocEntryBaseID + *std::prev(x: It);
1536	}
1537
1538	bool ASTReader::ReadSLocEntry(int ID) {
1539	if (ID == 0)
1540	return false;
1541
1542	if (unsigned(-ID) - 2 >= getTotalNumSLocs() || ID > 0) {
1543	Error(Msg: "source location entry ID out-of-range for AST file");
1544	return true;
1545	}
1546
1547	// Local helper to read the (possibly-compressed) buffer data following the
1548	// entry record.
1549	auto ReadBuffer = [this](
1550	BitstreamCursor &SLocEntryCursor,
1551	StringRef Name) -> std::unique_ptr<llvm::MemoryBuffer> {
1552	RecordData Record;
1553	StringRef Blob;
1554	Expected<unsigned> MaybeCode = SLocEntryCursor.ReadCode();
1555	if (!MaybeCode) {
1556	Error(Err: MaybeCode.takeError());
1557	return nullptr;
1558	}
1559	unsigned Code = MaybeCode.get();
1560
1561	Expected<unsigned> MaybeRecCode =
1562	SLocEntryCursor.readRecord(AbbrevID: Code, Vals&: Record, Blob: &Blob);
1563	if (!MaybeRecCode) {
1564	Error(Err: MaybeRecCode.takeError());
1565	return nullptr;
1566	}
1567	unsigned RecCode = MaybeRecCode.get();
1568
1569	if (RecCode == SM_SLOC_BUFFER_BLOB_COMPRESSED) {
1570	// Inspect the first byte to differentiate zlib (\x78) and zstd
1571	// (little-endian 0xFD2FB528).
1572	const llvm::compression::Format F =
1573	Blob.size() > 0 && Blob.data()[0] == 0x78
1574	? llvm::compression::Format::Zlib
1575	: llvm::compression::Format::Zstd;
1576	if (const char *Reason = llvm::compression::getReasonIfUnsupported(F)) {
1577	Error(Msg: Reason);
1578	return nullptr;
1579	}
1580	SmallVector<uint8_t, 0> Decompressed;
1581	if (llvm::Error E = llvm::compression::decompress(
1582	F, Input: llvm::arrayRefFromStringRef(Input: Blob), Output&: Decompressed, UncompressedSize: Record[0])) {
1583	Error(Msg: "could not decompress embedded file contents: " +
1584	llvm::toString(E: std::move(E)));
1585	return nullptr;
1586	}
1587	return llvm::MemoryBuffer::getMemBufferCopy(
1588	InputData: llvm::toStringRef(Input: Decompressed), BufferName: Name);
1589	} else if (RecCode == SM_SLOC_BUFFER_BLOB) {
1590	return llvm::MemoryBuffer::getMemBuffer(InputData: Blob.drop_back(N: 1), BufferName: Name, RequiresNullTerminator: true);
1591	} else {
1592	Error(Msg: "AST record has invalid code");
1593	return nullptr;
1594	}
1595	};
1596
1597	ModuleFile *F = GlobalSLocEntryMap.find(K: -ID)->second;
1598	if (llvm::Error Err = F->SLocEntryCursor.JumpToBit(
1599	BitNo: F->SLocEntryOffsetsBase +
1600	F->SLocEntryOffsets[ID - F->SLocEntryBaseID])) {
1601	Error(Err: std::move(Err));
1602	return true;
1603	}
1604
1605	BitstreamCursor &SLocEntryCursor = F->SLocEntryCursor;
1606	SourceLocation::UIntTy BaseOffset = F->SLocEntryBaseOffset;
1607
1608	++NumSLocEntriesRead;
1609	Expected<llvm::BitstreamEntry> MaybeEntry = SLocEntryCursor.advance();
1610	if (!MaybeEntry) {
1611	Error(Err: MaybeEntry.takeError());
1612	return true;
1613	}
1614	llvm::BitstreamEntry Entry = MaybeEntry.get();
1615
1616	if (Entry.Kind != llvm::BitstreamEntry::Record) {
1617	Error(Msg: "incorrectly-formatted source location entry in AST file");
1618	return true;
1619	}
1620
1621	RecordData Record;
1622	StringRef Blob;
1623	Expected<unsigned> MaybeSLOC =
1624	SLocEntryCursor.readRecord(AbbrevID: Entry.ID, Vals&: Record, Blob: &Blob);
1625	if (!MaybeSLOC) {
1626	Error(Err: MaybeSLOC.takeError());
1627	return true;
1628	}
1629	switch (MaybeSLOC.get()) {
1630	default:
1631	Error(Msg: "incorrectly-formatted source location entry in AST file");
1632	return true;
1633
1634	case SM_SLOC_FILE_ENTRY: {
1635	// We will detect whether a file changed and return 'Failure' for it, but
1636	// we will also try to fail gracefully by setting up the SLocEntry.
1637	unsigned InputID = Record[4];
1638	InputFile IF = getInputFile(F&: *F, ID: InputID);
1639	OptionalFileEntryRef File = IF.getFile();
1640	bool OverriddenBuffer = IF.isOverridden();
1641
1642	// Note that we only check if a File was returned. If it was out-of-date
1643	// we have complained but we will continue creating a FileID to recover
1644	// gracefully.
1645	if (!File)
1646	return true;
1647
1648	SourceLocation IncludeLoc = ReadSourceLocation(ModuleFile&: *F, Raw: Record[1]);
1649	if (IncludeLoc.isInvalid() && F->Kind != MK_MainFile) {
1650	// This is the module's main file.
1651	IncludeLoc = getImportLocation(F);
1652	}
1653	SrcMgr::CharacteristicKind
1654	FileCharacter = (SrcMgr::CharacteristicKind)Record[2];
1655	FileID FID = SourceMgr.createFileID(SourceFile: *File, IncludePos: IncludeLoc, FileCharacter, LoadedID: ID,
1656	LoadedOffset: BaseOffset + Record[0]);
1657	SrcMgr::FileInfo &FileInfo =
1658	const_cast<SrcMgr::FileInfo&>(SourceMgr.getSLocEntry(FID).getFile());
1659	FileInfo.NumCreatedFIDs = Record[5];
1660	if (Record[3])
1661	FileInfo.setHasLineDirectives();
1662
1663	unsigned NumFileDecls = Record[7];
1664	if (NumFileDecls && ContextObj) {
1665	const DeclID *FirstDecl = F->FileSortedDecls + Record[6];
1666	assert(F->FileSortedDecls && "FILE_SORTED_DECLS not encountered yet ?");
1667	FileDeclIDs[FID] =
1668	FileDeclsInfo(F, llvm::ArrayRef(FirstDecl, NumFileDecls));
1669	}
1670
1671	const SrcMgr::ContentCache &ContentCache =
1672	SourceMgr.getOrCreateContentCache(SourceFile: *File, isSystemFile: isSystem(CK: FileCharacter));
1673	if (OverriddenBuffer && !ContentCache.BufferOverridden &&
1674	ContentCache.ContentsEntry == ContentCache.OrigEntry &&
1675	!ContentCache.getBufferIfLoaded()) {
1676	auto Buffer = ReadBuffer(SLocEntryCursor, File->getName());
1677	if (!Buffer)
1678	return true;
1679	SourceMgr.overrideFileContents(SourceFile: *File, Buffer: std::move(Buffer));
1680	}
1681
1682	break;
1683	}
1684
1685	case SM_SLOC_BUFFER_ENTRY: {
1686	const char *Name = Blob.data();
1687	unsigned Offset = Record[0];
1688	SrcMgr::CharacteristicKind
1689	FileCharacter = (SrcMgr::CharacteristicKind)Record[2];
1690	SourceLocation IncludeLoc = ReadSourceLocation(ModuleFile&: *F, Raw: Record[1]);
1691	if (IncludeLoc.isInvalid() && F->isModule()) {
1692	IncludeLoc = getImportLocation(F);
1693	}
1694
1695	auto Buffer = ReadBuffer(SLocEntryCursor, Name);
1696	if (!Buffer)
1697	return true;
1698	FileID FID = SourceMgr.createFileID(Buffer: std::move(Buffer), FileCharacter, LoadedID: ID,
1699	LoadedOffset: BaseOffset + Offset, IncludeLoc);
1700	if (Record[3]) {
1701	auto &FileInfo =
1702	const_cast<SrcMgr::FileInfo &>(SourceMgr.getSLocEntry(FID).getFile());
1703	FileInfo.setHasLineDirectives();
1704	}
1705	break;
1706	}
1707
1708	case SM_SLOC_EXPANSION_ENTRY: {
1709	LocSeq::State Seq;
1710	SourceLocation SpellingLoc = ReadSourceLocation(ModuleFile&: *F, Raw: Record[1], Seq);
1711	SourceLocation ExpansionBegin = ReadSourceLocation(ModuleFile&: *F, Raw: Record[2], Seq);
1712	SourceLocation ExpansionEnd = ReadSourceLocation(ModuleFile&: *F, Raw: Record[3], Seq);
1713	SourceMgr.createExpansionLoc(SpellingLoc, ExpansionLocStart: ExpansionBegin, ExpansionLocEnd: ExpansionEnd,
1714	Length: Record[5], ExpansionIsTokenRange: Record[4], LoadedID: ID,
1715	LoadedOffset: BaseOffset + Record[0]);
1716	break;
1717	}
1718	}
1719
1720	return false;
1721	}
1722
1723	std::pair<SourceLocation, StringRef> ASTReader::getModuleImportLoc(int ID) {
1724	if (ID == 0)
1725	return std::make_pair(x: SourceLocation(), y: "");
1726
1727	if (unsigned(-ID) - 2 >= getTotalNumSLocs() || ID > 0) {
1728	Error(Msg: "source location entry ID out-of-range for AST file");
1729	return std::make_pair(x: SourceLocation(), y: "");
1730	}
1731
1732	// Find which module file this entry lands in.
1733	ModuleFile *M = GlobalSLocEntryMap.find(K: -ID)->second;
1734	if (!M->isModule())
1735	return std::make_pair(x: SourceLocation(), y: "");
1736
1737	// FIXME: Can we map this down to a particular submodule? That would be
1738	// ideal.
1739	return std::make_pair(x&: M->ImportLoc, y: StringRef(M->ModuleName));
1740	}
1741
1742	/// Find the location where the module F is imported.
1743	SourceLocation ASTReader::getImportLocation(ModuleFile *F) {
1744	if (F->ImportLoc.isValid())
1745	return F->ImportLoc;
1746
1747	// Otherwise we have a PCH. It's considered to be "imported" at the first
1748	// location of its includer.
1749	if (F->ImportedBy.empty() || !F->ImportedBy[0]) {
1750	// Main file is the importer.
1751	assert(SourceMgr.getMainFileID().isValid() && "missing main file");
1752	return SourceMgr.getLocForStartOfFile(FID: SourceMgr.getMainFileID());
1753	}
1754	return F->ImportedBy[0]->FirstLoc;
1755	}
1756
1757	/// Enter a subblock of the specified BlockID with the specified cursor. Read
1758	/// the abbreviations that are at the top of the block and then leave the cursor
1759	/// pointing into the block.
1760	llvm::Error ASTReader::ReadBlockAbbrevs(BitstreamCursor &Cursor,
1761	unsigned BlockID,
1762	uint64_t *StartOfBlockOffset) {
1763	if (llvm::Error Err = Cursor.EnterSubBlock(BlockID))
1764	return Err;
1765
1766	if (StartOfBlockOffset)
1767	*StartOfBlockOffset = Cursor.GetCurrentBitNo();
1768
1769	while (true) {
1770	uint64_t Offset = Cursor.GetCurrentBitNo();
1771	Expected<unsigned> MaybeCode = Cursor.ReadCode();
1772	if (!MaybeCode)
1773	return MaybeCode.takeError();
1774	unsigned Code = MaybeCode.get();
1775
1776	// We expect all abbrevs to be at the start of the block.
1777	if (Code != llvm::bitc::DEFINE_ABBREV) {
1778	if (llvm::Error Err = Cursor.JumpToBit(BitNo: Offset))
1779	return Err;
1780	return llvm::Error::success();
1781	}
1782	if (llvm::Error Err = Cursor.ReadAbbrevRecord())
1783	return Err;
1784	}
1785	}
1786
1787	Token ASTReader::ReadToken(ModuleFile &M, const RecordDataImpl &Record,
1788	unsigned &Idx) {
1789	Token Tok;
1790	Tok.startToken();
1791	Tok.setLocation(ReadSourceLocation(ModuleFile&: M, Record, Idx));
1792	Tok.setKind((tok::TokenKind)Record[Idx++]);
1793	Tok.setFlag((Token::TokenFlags)Record[Idx++]);
1794
1795	if (Tok.isAnnotation()) {
1796	Tok.setAnnotationEndLoc(ReadSourceLocation(ModuleFile&: M, Record, Idx));
1797	switch (Tok.getKind()) {
1798	case tok::annot_pragma_loop_hint: {
1799	auto *Info = new (PP.getPreprocessorAllocator()) PragmaLoopHintInfo;
1800	Info->PragmaName = ReadToken(M, Record, Idx);
1801	Info->Option = ReadToken(M, Record, Idx);
1802	unsigned NumTokens = Record[Idx++];
1803	SmallVector<Token, 4> Toks;
1804	Toks.reserve(N: NumTokens);
1805	for (unsigned I = 0; I < NumTokens; ++I)
1806	Toks.push_back(Elt: ReadToken(M, Record, Idx));
1807	Info->Toks = llvm::ArrayRef(Toks).copy(A&: PP.getPreprocessorAllocator());
1808	Tok.setAnnotationValue(static_cast<void *>(Info));
1809	break;
1810	}
1811	case tok::annot_pragma_pack: {
1812	auto *Info = new (PP.getPreprocessorAllocator()) Sema::PragmaPackInfo;
1813	Info->Action = static_cast<Sema::PragmaMsStackAction>(Record[Idx++]);
1814	auto SlotLabel = ReadString(Record, Idx);
1815	Info->SlotLabel =
1816	llvm::StringRef(SlotLabel).copy(A&: PP.getPreprocessorAllocator());
1817	Info->Alignment = ReadToken(M, Record, Idx);
1818	Tok.setAnnotationValue(static_cast<void *>(Info));
1819	break;
1820	}
1821	// Some annotation tokens do not use the PtrData field.
1822	case tok::annot_pragma_openmp:
1823	case tok::annot_pragma_openmp_end:
1824	case tok::annot_pragma_unused:
1825	case tok::annot_pragma_openacc:
1826	case tok::annot_pragma_openacc_end:
1827	break;
1828	default:
1829	llvm_unreachable("missing deserialization code for annotation token");
1830	}
1831	} else {
1832	Tok.setLength(Record[Idx++]);
1833	if (IdentifierInfo *II = getLocalIdentifier(M, LocalID: Record[Idx++]))
1834	Tok.setIdentifierInfo(II);
1835	}
1836	return Tok;
1837	}
1838
1839	MacroInfo *ASTReader::ReadMacroRecord(ModuleFile &F, uint64_t Offset) {
1840	BitstreamCursor &Stream = F.MacroCursor;
1841
1842	// Keep track of where we are in the stream, then jump back there
1843	// after reading this macro.
1844	SavedStreamPosition SavedPosition(Stream);
1845
1846	if (llvm::Error Err = Stream.JumpToBit(BitNo: Offset)) {
1847	// FIXME this drops errors on the floor.
1848	consumeError(Err: std::move(Err));
1849	return nullptr;
1850	}
1851	RecordData Record;
1852	SmallVector<IdentifierInfo*, 16> MacroParams;
1853	MacroInfo *Macro = nullptr;
1854	llvm::MutableArrayRef<Token> MacroTokens;
1855
1856	while (true) {
1857	// Advance to the next record, but if we get to the end of the block, don't
1858	// pop it (removing all the abbreviations from the cursor) since we want to
1859	// be able to reseek within the block and read entries.
1860	unsigned Flags = BitstreamCursor::AF_DontPopBlockAtEnd;
1861	Expected<llvm::BitstreamEntry> MaybeEntry =
1862	Stream.advanceSkippingSubblocks(Flags);
1863	if (!MaybeEntry) {
1864	Error(Err: MaybeEntry.takeError());
1865	return Macro;
1866	}
1867	llvm::BitstreamEntry Entry = MaybeEntry.get();
1868
1869	switch (Entry.Kind) {
1870	case llvm::BitstreamEntry::SubBlock: // Handled for us already.
1871	case llvm::BitstreamEntry::Error:
1872	Error(Msg: "malformed block record in AST file");
1873	return Macro;
1874	case llvm::BitstreamEntry::EndBlock:
1875	return Macro;
1876	case llvm::BitstreamEntry::Record:
1877	// The interesting case.
1878	break;
1879	}
1880
1881	// Read a record.
1882	Record.clear();
1883	PreprocessorRecordTypes RecType;
1884	if (Expected<unsigned> MaybeRecType = Stream.readRecord(AbbrevID: Entry.ID, Vals&: Record))
1885	RecType = (PreprocessorRecordTypes)MaybeRecType.get();
1886	else {
1887	Error(Err: MaybeRecType.takeError());
1888	return Macro;
1889	}
1890	switch (RecType) {
1891	case PP_MODULE_MACRO:
1892	case PP_MACRO_DIRECTIVE_HISTORY:
1893	return Macro;
1894
1895	case PP_MACRO_OBJECT_LIKE:
1896	case PP_MACRO_FUNCTION_LIKE: {
1897	// If we already have a macro, that means that we've hit the end
1898	// of the definition of the macro we were looking for. We're
1899	// done.
1900	if (Macro)
1901	return Macro;
1902
1903	unsigned NextIndex = 1; // Skip identifier ID.
1904	SourceLocation Loc = ReadSourceLocation(ModuleFile&: F, Record, Idx&: NextIndex);
1905	MacroInfo *MI = PP.AllocateMacroInfo(L: Loc);
1906	MI->setDefinitionEndLoc(ReadSourceLocation(ModuleFile&: F, Record, Idx&: NextIndex));
1907	MI->setIsUsed(Record[NextIndex++]);
1908	MI->setUsedForHeaderGuard(Record[NextIndex++]);
1909	MacroTokens = MI->allocateTokens(NumTokens: Record[NextIndex++],
1910	PPAllocator&: PP.getPreprocessorAllocator());
1911	if (RecType == PP_MACRO_FUNCTION_LIKE) {
1912	// Decode function-like macro info.
1913	bool isC99VarArgs = Record[NextIndex++];
1914	bool isGNUVarArgs = Record[NextIndex++];
1915	bool hasCommaPasting = Record[NextIndex++];
1916	MacroParams.clear();
1917	unsigned NumArgs = Record[NextIndex++];
1918	for (unsigned i = 0; i != NumArgs; ++i)
1919	MacroParams.push_back(Elt: getLocalIdentifier(M&: F, LocalID: Record[NextIndex++]));
1920
1921	// Install function-like macro info.
1922	MI->setIsFunctionLike();
1923	if (isC99VarArgs) MI->setIsC99Varargs();
1924	if (isGNUVarArgs) MI->setIsGNUVarargs();
1925	if (hasCommaPasting) MI->setHasCommaPasting();
1926	MI->setParameterList(List: MacroParams, PPAllocator&: PP.getPreprocessorAllocator());
1927	}
1928
1929	// Remember that we saw this macro last so that we add the tokens that
1930	// form its body to it.
1931	Macro = MI;
1932
1933	if (NextIndex + 1 == Record.size() && PP.getPreprocessingRecord() &&
1934	Record[NextIndex]) {
1935	// We have a macro definition. Register the association
1936	PreprocessedEntityID
1937	GlobalID = getGlobalPreprocessedEntityID(M&: F, LocalID: Record[NextIndex]);
1938	PreprocessingRecord &PPRec = *PP.getPreprocessingRecord();
1939	PreprocessingRecord::PPEntityID PPID =
1940	PPRec.getPPEntityID(Index: GlobalID - 1, /*isLoaded=*/true);
1941	MacroDefinitionRecord *PPDef = cast_or_null<MacroDefinitionRecord>(
1942	Val: PPRec.getPreprocessedEntity(PPID));
1943	if (PPDef)
1944	PPRec.RegisterMacroDefinition(Macro, Def: PPDef);
1945	}
1946
1947	++NumMacrosRead;
1948	break;
1949	}
1950
1951	case PP_TOKEN: {
1952	// If we see a TOKEN before a PP_MACRO_*, then the file is
1953	// erroneous, just pretend we didn't see this.
1954	if (!Macro) break;
1955	if (MacroTokens.empty()) {
1956	Error(Msg: "unexpected number of macro tokens for a macro in AST file");
1957	return Macro;
1958	}
1959
1960	unsigned Idx = 0;
1961	MacroTokens[0] = ReadToken(M&: F, Record, Idx);
1962	MacroTokens = MacroTokens.drop_front();
1963	break;
1964	}
1965	}
1966	}
1967	}
1968
1969	PreprocessedEntityID
1970	ASTReader::getGlobalPreprocessedEntityID(ModuleFile &M,
1971	unsigned LocalID) const {
1972	if (!M.ModuleOffsetMap.empty())
1973	ReadModuleOffsetMap(F&: M);
1974
1975	ContinuousRangeMap<uint32_t, int, 2>::const_iterator
1976	I = M.PreprocessedEntityRemap.find(K: LocalID - NUM_PREDEF_PP_ENTITY_IDS);
1977	assert(I != M.PreprocessedEntityRemap.end()
1978	&& "Invalid index into preprocessed entity index remap");
1979
1980	return LocalID + I->second;
1981	}
1982
1983	const FileEntry *HeaderFileInfoTrait::getFile(const internal_key_type &Key) {
1984	FileManager &FileMgr = Reader.getFileManager();
1985	if (!Key.Imported) {
1986	if (auto File = FileMgr.getFile(Filename: Key.Filename))
1987	return *File;
1988	return nullptr;
1989	}
1990
1991	std::string Resolved = std::string(Key.Filename);
1992	Reader.ResolveImportedPath(M, Filename&: Resolved);
1993	if (auto File = FileMgr.getFile(Filename: Resolved))
1994	return *File;
1995	return nullptr;
1996	}
1997
1998	unsigned HeaderFileInfoTrait::ComputeHash(internal_key_ref ikey) {
1999	return llvm::hash_combine(args: ikey.Size, args: ikey.ModTime);
2000	}
2001
2002	HeaderFileInfoTrait::internal_key_type
2003	HeaderFileInfoTrait::GetInternalKey(external_key_type ekey) {
2004	internal_key_type ikey = {.Size: ekey.getSize(),
2005	.ModTime: M.HasTimestamps ? ekey.getModificationTime() : 0,
2006	.Filename: ekey.getName(), /*Imported*/ false};
2007	return ikey;
2008	}
2009
2010	bool HeaderFileInfoTrait::EqualKey(internal_key_ref a, internal_key_ref b) {
2011	if (a.Size != b.Size || (a.ModTime && b.ModTime && a.ModTime != b.ModTime))
2012	return false;
2013
2014	if (llvm::sys::path::is_absolute(path: a.Filename) && a.Filename == b.Filename)
2015	return true;
2016
2017	// Determine whether the actual files are equivalent.
2018	const FileEntry *FEA = getFile(Key: a);
2019	const FileEntry *FEB = getFile(Key: b);
2020	return FEA && FEA == FEB;
2021	}
2022
2023	std::pair<unsigned, unsigned>
2024	HeaderFileInfoTrait::ReadKeyDataLength(const unsigned char*& d) {
2025	return readULEBKeyDataLength(P&: d);
2026	}
2027
2028	HeaderFileInfoTrait::internal_key_type
2029	HeaderFileInfoTrait::ReadKey(const unsigned char *d, unsigned) {
2030	using namespace llvm::support;
2031
2032	internal_key_type ikey;
2033	ikey.Size =
2034	off_t(endian::readNext<uint64_t, llvm::endianness::little, unaligned>(memory&: d));
2035	ikey.ModTime = time_t(
2036	endian::readNext<uint64_t, llvm::endianness::little, unaligned>(memory&: d));
2037	ikey.Filename = (const char *)d;
2038	ikey.Imported = true;
2039	return ikey;
2040	}
2041
2042	HeaderFileInfoTrait::data_type
2043	HeaderFileInfoTrait::ReadData(internal_key_ref key, const unsigned char *d,
2044	unsigned DataLen) {
2045	using namespace llvm::support;
2046
2047	const unsigned char *End = d + DataLen;
2048	HeaderFileInfo HFI;
2049	unsigned Flags = *d++;
2050
2051	bool Included = (Flags >> 6) & 0x01;
2052	if (Included)
2053	if (const FileEntry *FE = getFile(Key: key))
2054	// Not using \c Preprocessor::markIncluded(), since that would attempt to
2055	// deserialize this header file info again.
2056	Reader.getPreprocessor().getIncludedFiles().insert(V: FE);
2057
2058	// FIXME: Refactor with mergeHeaderFileInfo in HeaderSearch.cpp.
2059	HFI.isImport |= (Flags >> 5) & 0x01;
2060	HFI.isPragmaOnce |= (Flags >> 4) & 0x01;
2061	HFI.DirInfo = (Flags >> 1) & 0x07;
2062	HFI.IndexHeaderMapHeader = Flags & 0x01;
2063	HFI.ControllingMacroID = Reader.getGlobalIdentifierID(
2064	M, LocalID: endian::readNext<uint32_t, llvm::endianness::little, unaligned>(memory&: d));
2065	if (unsigned FrameworkOffset =
2066	endian::readNext<uint32_t, llvm::endianness::little, unaligned>(memory&: d)) {
2067	// The framework offset is 1 greater than the actual offset,
2068	// since 0 is used as an indicator for "no framework name".
2069	StringRef FrameworkName(FrameworkStrings + FrameworkOffset - 1);
2070	HFI.Framework = HS->getUniqueFrameworkName(Framework: FrameworkName);
2071	}
2072
2073	assert((End - d) % 4 == 0 &&
2074	"Wrong data length in HeaderFileInfo deserialization");
2075	while (d != End) {
2076	uint32_t LocalSMID =
2077	endian::readNext<uint32_t, llvm::endianness::little, unaligned>(memory&: d);
2078	auto HeaderRole = static_cast<ModuleMap::ModuleHeaderRole>(LocalSMID & 7);
2079	LocalSMID >>= 3;
2080
2081	// This header is part of a module. Associate it with the module to enable
2082	// implicit module import.
2083	SubmoduleID GlobalSMID = Reader.getGlobalSubmoduleID(M, LocalID: LocalSMID);
2084	Module *Mod = Reader.getSubmodule(GlobalID: GlobalSMID);
2085	FileManager &FileMgr = Reader.getFileManager();
2086	ModuleMap &ModMap =
2087	Reader.getPreprocessor().getHeaderSearchInfo().getModuleMap();
2088
2089	std::string Filename = std::string(key.Filename);
2090	if (key.Imported)
2091	Reader.ResolveImportedPath(M, Filename);
2092	if (auto FE = FileMgr.getOptionalFileRef(Filename)) {
2093	// FIXME: NameAsWritten
2094	Module::Header H = {.NameAsWritten: std::string(key.Filename), .PathRelativeToRootModuleDirectory: "", .Entry: *FE};
2095	ModMap.addHeader(Mod, Header: H, Role: HeaderRole, /*Imported=*/true);
2096	}
2097	HFI.isModuleHeader |= ModuleMap::isModular(Role: HeaderRole);
2098	}
2099
2100	// This HeaderFileInfo was externally loaded.
2101	HFI.External = true;
2102	HFI.IsValid = true;
2103	return HFI;
2104	}
2105
2106	void ASTReader::addPendingMacro(IdentifierInfo *II, ModuleFile *M,
2107	uint32_t MacroDirectivesOffset) {
2108	assert(NumCurrentElementsDeserializing > 0 &&"Missing deserialization guard");
2109	PendingMacroIDs[II].push_back(Elt: PendingMacroInfo(M, MacroDirectivesOffset));
2110	}
2111
2112	void ASTReader::ReadDefinedMacros() {
2113	// Note that we are loading defined macros.
2114	Deserializing Macros(this);
2115
2116	for (ModuleFile &I : llvm::reverse(C&: ModuleMgr)) {
2117	BitstreamCursor &MacroCursor = I.MacroCursor;
2118
2119	// If there was no preprocessor block, skip this file.
2120	if (MacroCursor.getBitcodeBytes().empty())
2121	continue;
2122
2123	BitstreamCursor Cursor = MacroCursor;
2124	if (llvm::Error Err = Cursor.JumpToBit(BitNo: I.MacroStartOffset)) {
2125	Error(Err: std::move(Err));
2126	return;
2127	}
2128
2129	RecordData Record;
2130	while (true) {
2131	Expected<llvm::BitstreamEntry> MaybeE = Cursor.advanceSkippingSubblocks();
2132	if (!MaybeE) {
2133	Error(Err: MaybeE.takeError());
2134	return;
2135	}
2136	llvm::BitstreamEntry E = MaybeE.get();
2137
2138	switch (E.Kind) {
2139	case llvm::BitstreamEntry::SubBlock: // Handled for us already.
2140	case llvm::BitstreamEntry::Error:
2141	Error(Msg: "malformed block record in AST file");
2142	return;
2143	case llvm::BitstreamEntry::EndBlock:
2144	goto NextCursor;
2145
2146	case llvm::BitstreamEntry::Record: {
2147	Record.clear();
2148	Expected<unsigned> MaybeRecord = Cursor.readRecord(AbbrevID: E.ID, Vals&: Record);
2149	if (!MaybeRecord) {
2150	Error(Err: MaybeRecord.takeError());
2151	return;
2152	}
2153	switch (MaybeRecord.get()) {
2154	default: // Default behavior: ignore.
2155	break;
2156
2157	case PP_MACRO_OBJECT_LIKE:
2158	case PP_MACRO_FUNCTION_LIKE: {
2159	IdentifierInfo *II = getLocalIdentifier(M&: I, LocalID: Record[0]);
2160	if (II->isOutOfDate())
2161	updateOutOfDateIdentifier(II&: *II);
2162	break;
2163	}
2164
2165	case PP_TOKEN:
2166	// Ignore tokens.
2167	break;
2168	}
2169	break;
2170	}
2171	}
2172	}
2173	NextCursor: ;
2174	}
2175	}
2176
2177	namespace {
2178
2179	/// Visitor class used to look up identifirs in an AST file.
2180	class IdentifierLookupVisitor {
2181	StringRef Name;
2182	unsigned NameHash;
2183	unsigned PriorGeneration;
2184	unsigned &NumIdentifierLookups;
2185	unsigned &NumIdentifierLookupHits;
2186	IdentifierInfo *Found = nullptr;
2187
2188	public:
2189	IdentifierLookupVisitor(StringRef Name, unsigned PriorGeneration,
2190	unsigned &NumIdentifierLookups,
2191	unsigned &NumIdentifierLookupHits)
2192	: Name(Name), NameHash(ASTIdentifierLookupTrait::ComputeHash(a: Name)),
2193	PriorGeneration(PriorGeneration),
2194	NumIdentifierLookups(NumIdentifierLookups),
2195	NumIdentifierLookupHits(NumIdentifierLookupHits) {}
2196
2197	bool operator()(ModuleFile &M) {
2198	// If we've already searched this module file, skip it now.
2199	if (M.Generation <= PriorGeneration)
2200	return true;
2201
2202	ASTIdentifierLookupTable *IdTable
2203	= (ASTIdentifierLookupTable *)M.IdentifierLookupTable;
2204	if (!IdTable)
2205	return false;
2206
2207	ASTIdentifierLookupTrait Trait(IdTable->getInfoObj().getReader(), M,
2208	Found);
2209	++NumIdentifierLookups;
2210	ASTIdentifierLookupTable::iterator Pos =
2211	IdTable->find_hashed(IKey: Name, KeyHash: NameHash, InfoPtr: &Trait);
2212	if (Pos == IdTable->end())
2213	return false;
2214
2215	// Dereferencing the iterator has the effect of building the
2216	// IdentifierInfo node and populating it with the various
2217	// declarations it needs.
2218	++NumIdentifierLookupHits;
2219	Found = *Pos;
2220	return true;
2221	}
2222
2223	// Retrieve the identifier info found within the module
2224	// files.
2225	IdentifierInfo *getIdentifierInfo() const { return Found; }
2226	};
2227
2228	} // namespace
2229
2230	void ASTReader::updateOutOfDateIdentifier(IdentifierInfo &II) {
2231	// Note that we are loading an identifier.
2232	Deserializing AnIdentifier(this);
2233
2234	unsigned PriorGeneration = 0;
2235	if (getContext().getLangOpts().Modules)
2236	PriorGeneration = IdentifierGeneration[&II];
2237
2238	// If there is a global index, look there first to determine which modules
2239	// provably do not have any results for this identifier.
2240	GlobalModuleIndex::HitSet Hits;
2241	GlobalModuleIndex::HitSet *HitsPtr = nullptr;
2242	if (!loadGlobalIndex()) {
2243	if (GlobalIndex->lookupIdentifier(Name: II.getName(), Hits)) {
2244	HitsPtr = &Hits;
2245	}
2246	}
2247
2248	IdentifierLookupVisitor Visitor(II.getName(), PriorGeneration,
2249	NumIdentifierLookups,
2250	NumIdentifierLookupHits);
2251	ModuleMgr.visit(Visitor, ModuleFilesHit: HitsPtr);
2252	markIdentifierUpToDate(II: &II);
2253	}
2254
2255	void ASTReader::markIdentifierUpToDate(IdentifierInfo *II) {
2256	if (!II)
2257	return;
2258
2259	II->setOutOfDate(false);
2260
2261	// Update the generation for this identifier.
2262	if (getContext().getLangOpts().Modules)
2263	IdentifierGeneration[II] = getGeneration();
2264	}
2265
2266	void ASTReader::resolvePendingMacro(IdentifierInfo *II,
2267	const PendingMacroInfo &PMInfo) {
2268	ModuleFile &M = *PMInfo.M;
2269
2270	BitstreamCursor &Cursor = M.MacroCursor;
2271	SavedStreamPosition SavedPosition(Cursor);
2272	if (llvm::Error Err =
2273	Cursor.JumpToBit(BitNo: M.MacroOffsetsBase + PMInfo.MacroDirectivesOffset)) {
2274	Error(Err: std::move(Err));
2275	return;
2276	}
2277
2278	struct ModuleMacroRecord {
2279	SubmoduleID SubModID;
2280	MacroInfo *MI;
2281	SmallVector<SubmoduleID, 8> Overrides;
2282	};
2283	llvm::SmallVector<ModuleMacroRecord, 8> ModuleMacros;
2284
2285	// We expect to see a sequence of PP_MODULE_MACRO records listing exported
2286	// macros, followed by a PP_MACRO_DIRECTIVE_HISTORY record with the complete
2287	// macro histroy.
2288	RecordData Record;
2289	while (true) {
2290	Expected<llvm::BitstreamEntry> MaybeEntry =
2291	Cursor.advance(Flags: BitstreamCursor::AF_DontPopBlockAtEnd);
2292	if (!MaybeEntry) {
2293	Error(Err: MaybeEntry.takeError());
2294	return;
2295	}
2296	llvm::BitstreamEntry Entry = MaybeEntry.get();
2297
2298	if (Entry.Kind != llvm::BitstreamEntry::Record) {
2299	Error(Msg: "malformed block record in AST file");
2300	return;
2301	}
2302
2303	Record.clear();
2304	Expected<unsigned> MaybePP = Cursor.readRecord(AbbrevID: Entry.ID, Vals&: Record);
2305	if (!MaybePP) {
2306	Error(Err: MaybePP.takeError());
2307	return;
2308	}
2309	switch ((PreprocessorRecordTypes)MaybePP.get()) {
2310	case PP_MACRO_DIRECTIVE_HISTORY:
2311	break;
2312
2313	case PP_MODULE_MACRO: {
2314	ModuleMacros.push_back(Elt: ModuleMacroRecord());
2315	auto &Info = ModuleMacros.back();
2316	Info.SubModID = getGlobalSubmoduleID(M, LocalID: Record[0]);
2317	Info.MI = getMacro(ID: getGlobalMacroID(M, LocalID: Record[1]));
2318	for (int I = 2, N = Record.size(); I != N; ++I)
2319	Info.Overrides.push_back(Elt: getGlobalSubmoduleID(M, LocalID: Record[I]));
2320	continue;
2321	}
2322
2323	default:
2324	Error(Msg: "malformed block record in AST file");
2325	return;
2326	}
2327
2328	// We found the macro directive history; that's the last record
2329	// for this macro.
2330	break;
2331	}
2332
2333	// Module macros are listed in reverse dependency order.
2334	{
2335	std::reverse(first: ModuleMacros.begin(), last: ModuleMacros.end());
2336	llvm::SmallVector<ModuleMacro*, 8> Overrides;
2337	for (auto &MMR : ModuleMacros) {
2338	Overrides.clear();
2339	for (unsigned ModID : MMR.Overrides) {
2340	Module *Mod = getSubmodule(GlobalID: ModID);
2341	auto *Macro = PP.getModuleMacro(Mod, II);
2342	assert(Macro && "missing definition for overridden macro");
2343	Overrides.push_back(Elt: Macro);
2344	}
2345
2346	bool Inserted = false;
2347	Module *Owner = getSubmodule(GlobalID: MMR.SubModID);
2348	PP.addModuleMacro(Mod: Owner, II, Macro: MMR.MI, Overrides, IsNew&: Inserted);
2349	}
2350	}
2351
2352	// Don't read the directive history for a module; we don't have anywhere
2353	// to put it.
2354	if (M.isModule())
2355	return;
2356
2357	// Deserialize the macro directives history in reverse source-order.
2358	MacroDirective *Latest = nullptr, *Earliest = nullptr;
2359	unsigned Idx = 0, N = Record.size();
2360	while (Idx < N) {
2361	MacroDirective *MD = nullptr;
2362	SourceLocation Loc = ReadSourceLocation(ModuleFile&: M, Record, Idx);
2363	MacroDirective::Kind K = (MacroDirective::Kind)Record[Idx++];
2364	switch (K) {
2365	case MacroDirective::MD_Define: {
2366	MacroInfo *MI = getMacro(ID: getGlobalMacroID(M, LocalID: Record[Idx++]));
2367	MD = PP.AllocateDefMacroDirective(MI, Loc);
2368	break;
2369	}
2370	case MacroDirective::MD_Undefine:
2371	MD = PP.AllocateUndefMacroDirective(UndefLoc: Loc);
2372	break;
2373	case MacroDirective::MD_Visibility:
2374	bool isPublic = Record[Idx++];
2375	MD = PP.AllocateVisibilityMacroDirective(Loc, isPublic);
2376	break;
2377	}
2378
2379	if (!Latest)
2380	Latest = MD;
2381	if (Earliest)
2382	Earliest->setPrevious(MD);
2383	Earliest = MD;
2384	}
2385
2386	if (Latest)
2387	PP.setLoadedMacroDirective(II, ED: Earliest, MD: Latest);
2388	}
2389
2390	bool ASTReader::shouldDisableValidationForFile(
2391	const serialization::ModuleFile &M) const {
2392	if (DisableValidationKind == DisableValidationForModuleKind::None)
2393	return false;
2394
2395	// If a PCH is loaded and validation is disabled for PCH then disable
2396	// validation for the PCH and the modules it loads.
2397	ModuleKind K = CurrentDeserializingModuleKind.value_or(u: M.Kind);
2398
2399	switch (K) {
2400	case MK_MainFile:
2401	case MK_Preamble:
2402	case MK_PCH:
2403	return bool(DisableValidationKind & DisableValidationForModuleKind::PCH);
2404	case MK_ImplicitModule:
2405	case MK_ExplicitModule:
2406	case MK_PrebuiltModule:
2407	return bool(DisableValidationKind & DisableValidationForModuleKind::Module);
2408	}
2409
2410	return false;
2411	}
2412
2413	InputFileInfo ASTReader::getInputFileInfo(ModuleFile &F, unsigned ID) {
2414	// If this ID is bogus, just return an empty input file.
2415	if (ID == 0 || ID > F.InputFileInfosLoaded.size())
2416	return InputFileInfo();
2417
2418	// If we've already loaded this input file, return it.
2419	if (!F.InputFileInfosLoaded[ID - 1].Filename.empty())
2420	return F.InputFileInfosLoaded[ID - 1];
2421
2422	// Go find this input file.
2423	BitstreamCursor &Cursor = F.InputFilesCursor;
2424	SavedStreamPosition SavedPosition(Cursor);
2425	if (llvm::Error Err = Cursor.JumpToBit(BitNo: F.InputFilesOffsetBase +
2426	F.InputFileOffsets[ID - 1])) {
2427	// FIXME this drops errors on the floor.
2428	consumeError(Err: std::move(Err));
2429	}
2430
2431	Expected<unsigned> MaybeCode = Cursor.ReadCode();
2432	if (!MaybeCode) {
2433	// FIXME this drops errors on the floor.
2434	consumeError(Err: MaybeCode.takeError());
2435	}
2436	unsigned Code = MaybeCode.get();
2437	RecordData Record;
2438	StringRef Blob;
2439
2440	if (Expected<unsigned> Maybe = Cursor.readRecord(AbbrevID: Code, Vals&: Record, Blob: &Blob))
2441	assert(static_cast<InputFileRecordTypes>(Maybe.get()) == INPUT_FILE &&
2442	"invalid record type for input file");
2443	else {
2444	// FIXME this drops errors on the floor.
2445	consumeError(Err: Maybe.takeError());
2446	}
2447
2448	assert(Record[0] == ID && "Bogus stored ID or offset");
2449	InputFileInfo R;
2450	R.StoredSize = static_cast<off_t>(Record[1]);
2451	R.StoredTime = static_cast<time_t>(Record[2]);
2452	R.Overridden = static_cast<bool>(Record[3]);
2453	R.Transient = static_cast<bool>(Record[4]);
2454	R.TopLevel = static_cast<bool>(Record[5]);
2455	R.ModuleMap = static_cast<bool>(Record[6]);
2456	std::tie(args&: R.FilenameAsRequested, args&: R.Filename) = [&]() {
2457	uint16_t AsRequestedLength = Record[7];
2458
2459	std::string NameAsRequested = Blob.substr(Start: 0, N: AsRequestedLength).str();
2460	std::string Name = Blob.substr(Start: AsRequestedLength).str();
2461
2462	ResolveImportedPath(M&: F, Filename&: NameAsRequested);
2463	ResolveImportedPath(M&: F, Filename&: Name);
2464
2465	if (Name.empty())
2466	Name = NameAsRequested;
2467
2468	return std::make_pair(x: std::move(NameAsRequested), y: std::move(Name));
2469	}();
2470
2471	Expected<llvm::BitstreamEntry> MaybeEntry = Cursor.advance();
2472	if (!MaybeEntry) // FIXME this drops errors on the floor.
2473	consumeError(Err: MaybeEntry.takeError());
2474	llvm::BitstreamEntry Entry = MaybeEntry.get();
2475	assert(Entry.Kind == llvm::BitstreamEntry::Record &&
2476	"expected record type for input file hash");
2477
2478	Record.clear();
2479	if (Expected<unsigned> Maybe = Cursor.readRecord(AbbrevID: Entry.ID, Vals&: Record))
2480	assert(static_cast<InputFileRecordTypes>(Maybe.get()) == INPUT_FILE_HASH &&
2481	"invalid record type for input file hash");
2482	else {
2483	// FIXME this drops errors on the floor.
2484	consumeError(Err: Maybe.takeError());
2485	}
2486	R.ContentHash = (static_cast<uint64_t>(Record[1]) << 32) |
2487	static_cast<uint64_t>(Record[0]);
2488
2489	// Note that we've loaded this input file info.
2490	F.InputFileInfosLoaded[ID - 1] = R;
2491	return R;
2492	}
2493
2494	static unsigned moduleKindForDiagnostic(ModuleKind Kind);
2495	InputFile ASTReader::getInputFile(ModuleFile &F, unsigned ID, bool Complain) {
2496	// If this ID is bogus, just return an empty input file.
2497	if (ID == 0 || ID > F.InputFilesLoaded.size())
2498	return InputFile();
2499
2500	// If we've already loaded this input file, return it.
2501	if (F.InputFilesLoaded[ID-1].getFile())
2502	return F.InputFilesLoaded[ID-1];
2503
2504	if (F.InputFilesLoaded[ID-1].isNotFound())
2505	return InputFile();
2506
2507	// Go find this input file.
2508	BitstreamCursor &Cursor = F.InputFilesCursor;
2509	SavedStreamPosition SavedPosition(Cursor);
2510	if (llvm::Error Err = Cursor.JumpToBit(BitNo: F.InputFilesOffsetBase +
2511	F.InputFileOffsets[ID - 1])) {
2512	// FIXME this drops errors on the floor.
2513	consumeError(Err: std::move(Err));
2514	}
2515
2516	InputFileInfo FI = getInputFileInfo(F, ID);
2517	off_t StoredSize = FI.StoredSize;
2518	time_t StoredTime = FI.StoredTime;
2519	bool Overridden = FI.Overridden;
2520	bool Transient = FI.Transient;
2521	StringRef Filename = FI.FilenameAsRequested;
2522	uint64_t StoredContentHash = FI.ContentHash;
2523
2524	// For standard C++ modules, we don't need to check the inputs.
2525	bool SkipChecks = F.StandardCXXModule;
2526
2527	const HeaderSearchOptions &HSOpts =
2528	PP.getHeaderSearchInfo().getHeaderSearchOpts();
2529
2530	// The option ForceCheckCXX20ModulesInputFiles is only meaningful for C++20
2531	// modules.
2532	if (F.StandardCXXModule && HSOpts.ForceCheckCXX20ModulesInputFiles) {
2533	SkipChecks = false;
2534	Overridden = false;
2535	}
2536
2537	auto File = FileMgr.getOptionalFileRef(Filename, /*OpenFile=*/false);
2538
2539	// For an overridden file, create a virtual file with the stored
2540	// size/timestamp.
2541	if ((Overridden || Transient || SkipChecks) && !File)
2542	File = FileMgr.getVirtualFileRef(Filename, Size: StoredSize, ModificationTime: StoredTime);
2543
2544	if (!File) {
2545	if (Complain) {
2546	std::string ErrorStr = "could not find file '";
2547	ErrorStr += Filename;
2548	ErrorStr += "' referenced by AST file '";
2549	ErrorStr += F.FileName;
2550	ErrorStr += "'";
2551	Error(Msg: ErrorStr);
2552	}
2553	// Record that we didn't find the file.
2554	F.InputFilesLoaded[ID-1] = InputFile::getNotFound();
2555	return InputFile();
2556	}
2557
2558	// Check if there was a request to override the contents of the file
2559	// that was part of the precompiled header. Overriding such a file
2560	// can lead to problems when lexing using the source locations from the
2561	// PCH.
2562	SourceManager &SM = getSourceManager();
2563	// FIXME: Reject if the overrides are different.
2564	if ((!Overridden && !Transient) && !SkipChecks &&
2565	SM.isFileOverridden(File: *File)) {
2566	if (Complain)
2567	Error(diag::err_fe_pch_file_overridden, Filename);
2568
2569	// After emitting the diagnostic, bypass the overriding file to recover
2570	// (this creates a separate FileEntry).
2571	File = SM.bypassFileContentsOverride(File: *File);
2572	if (!File) {
2573	F.InputFilesLoaded[ID - 1] = InputFile::getNotFound();
2574	return InputFile();
2575	}
2576	}
2577
2578	struct Change {
2579	enum ModificationKind {
2580	Size,
2581	ModTime,
2582	Content,
2583	None,
2584	} Kind;
2585	std::optional<int64_t> Old = std::nullopt;
2586	std::optional<int64_t> New = std::nullopt;
2587	};
2588	auto HasInputContentChanged = [&](Change OriginalChange) {
2589	assert(ValidateASTInputFilesContent &&
2590	"We should only check the content of the inputs with "
2591	"ValidateASTInputFilesContent enabled.");
2592
2593	if (StoredContentHash == static_cast<uint64_t>(llvm::hash_code(-1)))
2594	return OriginalChange;
2595
2596	auto MemBuffOrError = FileMgr.getBufferForFile(Entry: *File);
2597	if (!MemBuffOrError) {
2598	if (!Complain)
2599	return OriginalChange;
2600	std::string ErrorStr = "could not get buffer for file '";
2601	ErrorStr += File->getName();
2602	ErrorStr += "'";
2603	Error(Msg: ErrorStr);
2604	return OriginalChange;
2605	}
2606
2607	// FIXME: hash_value is not guaranteed to be stable!
2608	auto ContentHash = hash_value(S: MemBuffOrError.get()->getBuffer());
2609	if (StoredContentHash == static_cast<uint64_t>(ContentHash))
2610	return Change{.Kind: Change::None};
2611
2612	return Change{.Kind: Change::Content};
2613	};
2614	auto HasInputFileChanged = [&]() {
2615	if (StoredSize != File->getSize())
2616	return Change{.Kind: Change::Size, .Old: StoredSize, .New: File->getSize()};
2617	if (!shouldDisableValidationForFile(M: F) && StoredTime &&
2618	StoredTime != File->getModificationTime()) {
2619	Change MTimeChange = {.Kind: Change::ModTime, .Old: StoredTime,
2620	.New: File->getModificationTime()};
2621
2622	// In case the modification time changes but not the content,
2623	// accept the cached file as legit.
2624	if (ValidateASTInputFilesContent)
2625	return HasInputContentChanged(MTimeChange);
2626
2627	return MTimeChange;
2628	}
2629	return Change{.Kind: Change::None};
2630	};
2631
2632	bool IsOutOfDate = false;
2633	auto FileChange = SkipChecks ? Change{.Kind: Change::None} : HasInputFileChanged();
2634	// When ForceCheckCXX20ModulesInputFiles and ValidateASTInputFilesContent
2635	// enabled, it is better to check the contents of the inputs. Since we can't
2636	// get correct modified time information for inputs from overriden inputs.
2637	if (HSOpts.ForceCheckCXX20ModulesInputFiles && ValidateASTInputFilesContent &&
2638	F.StandardCXXModule && FileChange.Kind == Change::None)
2639	FileChange = HasInputContentChanged(FileChange);
2640
2641	// For an overridden file, there is nothing to validate.
2642	if (!Overridden && FileChange.Kind != Change::None) {
2643	if (Complain && !Diags.isDiagnosticInFlight()) {
2644	// Build a list of the PCH imports that got us here (in reverse).
2645	SmallVector<ModuleFile *, 4> ImportStack(1, &F);
2646	while (!ImportStack.back()->ImportedBy.empty())
2647	ImportStack.push_back(Elt: ImportStack.back()->ImportedBy[0]);
2648
2649	// The top-level PCH is stale.
2650	StringRef TopLevelPCHName(ImportStack.back()->FileName);
2651	Diag(diag::err_fe_ast_file_modified)
2652	<< Filename << moduleKindForDiagnostic(ImportStack.back()->Kind)
2653	<< TopLevelPCHName << FileChange.Kind
2654	<< (FileChange.Old && FileChange.New)
2655	<< llvm::itostr(FileChange.Old.value_or(0))
2656	<< llvm::itostr(FileChange.New.value_or(0));
2657
2658	// Print the import stack.
2659	if (ImportStack.size() > 1) {
2660	Diag(diag::note_pch_required_by)
2661	<< Filename << ImportStack[0]->FileName;
2662	for (unsigned I = 1; I < ImportStack.size(); ++I)
2663	Diag(diag::note_pch_required_by)
2664	<< ImportStack[I-1]->FileName << ImportStack[I]->FileName;
2665	}
2666
2667	Diag(diag::note_pch_rebuild_required) << TopLevelPCHName;
2668	}
2669
2670	IsOutOfDate = true;
2671	}
2672	// FIXME: If the file is overridden and we've already opened it,
2673	// issue an error (or split it into a separate FileEntry).
2674
2675	InputFile IF = InputFile(*File, Overridden || Transient, IsOutOfDate);
2676
2677	// Note that we've loaded this input file.
2678	F.InputFilesLoaded[ID-1] = IF;
2679	return IF;
2680	}
2681
2682	/// If we are loading a relocatable PCH or module file, and the filename
2683	/// is not an absolute path, add the system or module root to the beginning of
2684	/// the file name.
2685	void ASTReader::ResolveImportedPath(ModuleFile &M, std::string &Filename) {
2686	// Resolve relative to the base directory, if we have one.
2687	if (!M.BaseDirectory.empty())
2688	return ResolveImportedPath(Filename, Prefix: M.BaseDirectory);
2689	}
2690
2691	void ASTReader::ResolveImportedPath(std::string &Filename, StringRef Prefix) {
2692	if (Filename.empty() || llvm::sys::path::is_absolute(path: Filename) ||
2693	Filename == "<built-in>" || Filename == "<command line>")
2694	return;
2695
2696	SmallString<128> Buffer;
2697	llvm::sys::path::append(path&: Buffer, a: Prefix, b: Filename);
2698	Filename.assign(first: Buffer.begin(), last: Buffer.end());
2699	}
2700
2701	static bool isDiagnosedResult(ASTReader::ASTReadResult ARR, unsigned Caps) {
2702	switch (ARR) {
2703	case ASTReader::Failure: return true;
2704	case ASTReader::Missing: return !(Caps & ASTReader::ARR_Missing);
2705	case ASTReader::OutOfDate: return !(Caps & ASTReader::ARR_OutOfDate);
2706	case ASTReader::VersionMismatch: return !(Caps & ASTReader::ARR_VersionMismatch);
2707	case ASTReader::ConfigurationMismatch:
2708	return !(Caps & ASTReader::ARR_ConfigurationMismatch);
2709	case ASTReader::HadErrors: return true;
2710	case ASTReader::Success: return false;
2711	}
2712
2713	llvm_unreachable("unknown ASTReadResult");
2714	}
2715
2716	ASTReader::ASTReadResult ASTReader::ReadOptionsBlock(
2717	BitstreamCursor &Stream, unsigned ClientLoadCapabilities,
2718	bool AllowCompatibleConfigurationMismatch, ASTReaderListener &Listener,
2719	std::string &SuggestedPredefines) {
2720	if (llvm::Error Err = Stream.EnterSubBlock(BlockID: OPTIONS_BLOCK_ID)) {
2721	// FIXME this drops errors on the floor.
2722	consumeError(Err: std::move(Err));
2723	return Failure;
2724	}
2725
2726	// Read all of the records in the options block.
2727	RecordData Record;
2728	ASTReadResult Result = Success;
2729	while (true) {
2730	Expected<llvm::BitstreamEntry> MaybeEntry = Stream.advance();
2731	if (!MaybeEntry) {
2732	// FIXME this drops errors on the floor.
2733	consumeError(Err: MaybeEntry.takeError());
2734	return Failure;
2735	}
2736	llvm::BitstreamEntry Entry = MaybeEntry.get();
2737
2738	switch (Entry.Kind) {
2739	case llvm::BitstreamEntry::Error:
2740	case llvm::BitstreamEntry::SubBlock:
2741	return Failure;
2742
2743	case llvm::BitstreamEntry::EndBlock:
2744	return Result;
2745
2746	case llvm::BitstreamEntry::Record:
2747	// The interesting case.
2748	break;
2749	}
2750
2751	// Read and process a record.
2752	Record.clear();
2753	Expected<unsigned> MaybeRecordType = Stream.readRecord(AbbrevID: Entry.ID, Vals&: Record);
2754	if (!MaybeRecordType) {
2755	// FIXME this drops errors on the floor.
2756	consumeError(Err: MaybeRecordType.takeError());
2757	return Failure;
2758	}
2759	switch ((OptionsRecordTypes)MaybeRecordType.get()) {
2760	case LANGUAGE_OPTIONS: {
2761	bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch) == 0;
2762	if (ParseLanguageOptions(Record, Complain, Listener,
2763	AllowCompatibleDifferences: AllowCompatibleConfigurationMismatch))
2764	Result = ConfigurationMismatch;
2765	break;
2766	}
2767
2768	case TARGET_OPTIONS: {
2769	bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch) == 0;
2770	if (ParseTargetOptions(Record, Complain, Listener,
2771	AllowCompatibleDifferences: AllowCompatibleConfigurationMismatch))
2772	Result = ConfigurationMismatch;
2773	break;
2774	}
2775
2776	case FILE_SYSTEM_OPTIONS: {
2777	bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch) == 0;
2778	if (!AllowCompatibleConfigurationMismatch &&
2779	ParseFileSystemOptions(Record, Complain, Listener))
2780	Result = ConfigurationMismatch;
2781	break;
2782	}
2783
2784	case HEADER_SEARCH_OPTIONS: {
2785	bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch) == 0;
2786	if (!AllowCompatibleConfigurationMismatch &&
2787	ParseHeaderSearchOptions(Record, Complain, Listener))
2788	Result = ConfigurationMismatch;
2789	break;
2790	}
2791
2792	case PREPROCESSOR_OPTIONS:
2793	bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch) == 0;
2794	if (!AllowCompatibleConfigurationMismatch &&
2795	ParsePreprocessorOptions(Record, Complain, Listener,
2796	SuggestedPredefines))
2797	Result = ConfigurationMismatch;
2798	break;
2799	}
2800	}
2801	}
2802
2803	ASTReader::ASTReadResult
2804	ASTReader::ReadControlBlock(ModuleFile &F,
2805	SmallVectorImpl<ImportedModule> &Loaded,
2806	const ModuleFile *ImportedBy,
2807	unsigned ClientLoadCapabilities) {
2808	BitstreamCursor &Stream = F.Stream;
2809
2810	if (llvm::Error Err = Stream.EnterSubBlock(BlockID: CONTROL_BLOCK_ID)) {
2811	Error(Err: std::move(Err));
2812	return Failure;
2813	}
2814
2815	// Lambda to read the unhashed control block the first time it's called.
2816	//
2817	// For PCM files, the unhashed control block cannot be read until after the
2818	// MODULE_NAME record. However, PCH files have no MODULE_NAME, and yet still
2819	// need to look ahead before reading the IMPORTS record. For consistency,
2820	// this block is always read somehow (see BitstreamEntry::EndBlock).
2821	bool HasReadUnhashedControlBlock = false;
2822	auto readUnhashedControlBlockOnce = [&]() {
2823	if (!HasReadUnhashedControlBlock) {
2824	HasReadUnhashedControlBlock = true;
2825	if (ASTReadResult Result =
2826	readUnhashedControlBlock(F, WasImportedBy: ImportedBy, ClientLoadCapabilities))
2827	return Result;
2828	}
2829	return Success;
2830	};
2831
2832	bool DisableValidation = shouldDisableValidationForFile(M: F);
2833
2834	// Read all of the records and blocks in the control block.
2835	RecordData Record;
2836	unsigned NumInputs = 0;
2837	unsigned NumUserInputs = 0;
2838	StringRef BaseDirectoryAsWritten;
2839	while (true) {
2840	Expected<llvm::BitstreamEntry> MaybeEntry = Stream.advance();
2841	if (!MaybeEntry) {
2842	Error(Err: MaybeEntry.takeError());
2843	return Failure;
2844	}
2845	llvm::BitstreamEntry Entry = MaybeEntry.get();
2846
2847	switch (Entry.Kind) {
2848	case llvm::BitstreamEntry::Error:
2849	Error(Msg: "malformed block record in AST file");
2850	return Failure;
2851	case llvm::BitstreamEntry::EndBlock: {
2852	// Validate the module before returning. This call catches an AST with
2853	// no module name and no imports.
2854	if (ASTReadResult Result = readUnhashedControlBlockOnce())
2855	return Result;
2856
2857	// Validate input files.
2858	const HeaderSearchOptions &HSOpts =
2859	PP.getHeaderSearchInfo().getHeaderSearchOpts();
2860
2861	// All user input files reside at the index range [0, NumUserInputs), and
2862	// system input files reside at [NumUserInputs, NumInputs). For explicitly
2863	// loaded module files, ignore missing inputs.
2864	if (!DisableValidation && F.Kind != MK_ExplicitModule &&
2865	F.Kind != MK_PrebuiltModule) {
2866	bool Complain = (ClientLoadCapabilities & ARR_OutOfDate) == 0;
2867
2868	// If we are reading a module, we will create a verification timestamp,
2869	// so we verify all input files. Otherwise, verify only user input
2870	// files.
2871
2872	unsigned N = ValidateSystemInputs ? NumInputs : NumUserInputs;
2873	if (HSOpts.ModulesValidateOncePerBuildSession &&
2874	F.InputFilesValidationTimestamp > HSOpts.BuildSessionTimestamp &&
2875	F.Kind == MK_ImplicitModule)
2876	N = NumUserInputs;
2877
2878	for (unsigned I = 0; I < N; ++I) {
2879	InputFile IF = getInputFile(F, ID: I+1, Complain);
2880	if (!IF.getFile() || IF.isOutOfDate())
2881	return OutOfDate;
2882	}
2883	}
2884
2885	if (Listener)
2886	Listener->visitModuleFile(Filename: F.FileName, Kind: F.Kind);
2887
2888	if (Listener && Listener->needsInputFileVisitation()) {
2889	unsigned N = Listener->needsSystemInputFileVisitation() ? NumInputs
2890	: NumUserInputs;
2891	for (unsigned I = 0; I < N; ++I) {
2892	bool IsSystem = I >= NumUserInputs;
2893	InputFileInfo FI = getInputFileInfo(F, ID: I + 1);
2894	Listener->visitInputFile(
2895	Filename: FI.FilenameAsRequested, isSystem: IsSystem, isOverridden: FI.Overridden,
2896	isExplicitModule: F.Kind == MK_ExplicitModule || F.Kind == MK_PrebuiltModule);
2897	}
2898	}
2899
2900	return Success;
2901	}
2902
2903	case llvm::BitstreamEntry::SubBlock:
2904	switch (Entry.ID) {
2905	case INPUT_FILES_BLOCK_ID:
2906	F.InputFilesCursor = Stream;
2907	if (llvm::Error Err = Stream.SkipBlock()) {
2908	Error(Err: std::move(Err));
2909	return Failure;
2910	}
2911	if (ReadBlockAbbrevs(Cursor&: F.InputFilesCursor, BlockID: INPUT_FILES_BLOCK_ID)) {
2912	Error(Msg: "malformed block record in AST file");
2913	return Failure;
2914	}
2915	F.InputFilesOffsetBase = F.InputFilesCursor.GetCurrentBitNo();
2916	continue;
2917
2918	case OPTIONS_BLOCK_ID:
2919	// If we're reading the first module for this group, check its options
2920	// are compatible with ours. For modules it imports, no further checking
2921	// is required, because we checked them when we built it.
2922	if (Listener && !ImportedBy) {
2923	// Should we allow the configuration of the module file to differ from
2924	// the configuration of the current translation unit in a compatible
2925	// way?
2926	//
2927	// FIXME: Allow this for files explicitly specified with -include-pch.
2928	bool AllowCompatibleConfigurationMismatch =
2929	F.Kind == MK_ExplicitModule || F.Kind == MK_PrebuiltModule;
2930
2931	ASTReadResult Result =
2932	ReadOptionsBlock(Stream, ClientLoadCapabilities,
2933	AllowCompatibleConfigurationMismatch, Listener&: *Listener,
2934	SuggestedPredefines);
2935	if (Result == Failure) {
2936	Error(Msg: "malformed block record in AST file");
2937	return Result;
2938	}
2939
2940	if (DisableValidation ||
2941	(AllowConfigurationMismatch && Result == ConfigurationMismatch))
2942	Result = Success;
2943
2944	// If we can't load the module, exit early since we likely
2945	// will rebuild the module anyway. The stream may be in the
2946	// middle of a block.
2947	if (Result != Success)
2948	return Result;
2949	} else if (llvm::Error Err = Stream.SkipBlock()) {
2950	Error(Err: std::move(Err));
2951	return Failure;
2952	}
2953	continue;
2954
2955	default:
2956	if (llvm::Error Err = Stream.SkipBlock()) {
2957	Error(Err: std::move(Err));
2958	return Failure;
2959	}
2960	continue;
2961	}
2962
2963	case llvm::BitstreamEntry::Record:
2964	// The interesting case.
2965	break;
2966	}
2967
2968	// Read and process a record.
2969	Record.clear();
2970	StringRef Blob;
2971	Expected<unsigned> MaybeRecordType =
2972	Stream.readRecord(AbbrevID: Entry.ID, Vals&: Record, Blob: &Blob);
2973	if (!MaybeRecordType) {
2974	Error(Err: MaybeRecordType.takeError());
2975	return Failure;
2976	}
2977	switch ((ControlRecordTypes)MaybeRecordType.get()) {
2978	case METADATA: {
2979	if (Record[0] != VERSION_MAJOR && !DisableValidation) {
2980	if ((ClientLoadCapabilities & ARR_VersionMismatch) == 0)
2981	Diag(Record[0] < VERSION_MAJOR? diag::err_pch_version_too_old
2982	: diag::err_pch_version_too_new);
2983	return VersionMismatch;
2984	}
2985
2986	bool hasErrors = Record[7];
2987	if (hasErrors && !DisableValidation) {
2988	// If requested by the caller and the module hasn't already been read
2989	// or compiled, mark modules on error as out-of-date.
2990	if ((ClientLoadCapabilities & ARR_TreatModuleWithErrorsAsOutOfDate) &&
2991	canRecoverFromOutOfDate(ModuleFileName: F.FileName, ClientLoadCapabilities))
2992	return OutOfDate;
2993
2994	if (!AllowASTWithCompilerErrors) {
2995	Diag(diag::err_pch_with_compiler_errors);
2996	return HadErrors;
2997	}
2998	}
2999	if (hasErrors) {
3000	Diags.ErrorOccurred = true;
3001	Diags.UncompilableErrorOccurred = true;
3002	Diags.UnrecoverableErrorOccurred = true;
3003	}
3004
3005	F.RelocatablePCH = Record[4];
3006	// Relative paths in a relocatable PCH are relative to our sysroot.
3007	if (F.RelocatablePCH)
3008	F.BaseDirectory = isysroot.empty() ? "/" : isysroot;
3009
3010	F.StandardCXXModule = Record[5];
3011
3012	F.HasTimestamps = Record[6];
3013
3014	const std::string &CurBranch = getClangFullRepositoryVersion();
3015	StringRef ASTBranch = Blob;
3016	if (StringRef(CurBranch) != ASTBranch && !DisableValidation) {
3017	if ((ClientLoadCapabilities & ARR_VersionMismatch) == 0)
3018	Diag(diag::err_pch_different_branch) << ASTBranch << CurBranch;
3019	return VersionMismatch;
3020	}
3021	break;
3022	}
3023
3024	case IMPORTS: {
3025	// Validate the AST before processing any imports (otherwise, untangling
3026	// them can be error-prone and expensive). A module will have a name and
3027	// will already have been validated, but this catches the PCH case.
3028	if (ASTReadResult Result = readUnhashedControlBlockOnce())
3029	return Result;
3030
3031	// Load each of the imported PCH files.
3032	unsigned Idx = 0, N = Record.size();
3033	while (Idx < N) {
3034	// Read information about the AST file.
3035	ModuleKind ImportedKind = (ModuleKind)Record[Idx++];
3036	// Whether we're importing a standard c++ module.
3037	bool IsImportingStdCXXModule = Record[Idx++];
3038	// The import location will be the local one for now; we will adjust
3039	// all import locations of module imports after the global source
3040	// location info are setup, in ReadAST.
3041	SourceLocation ImportLoc =
3042	ReadUntranslatedSourceLocation(Raw: Record[Idx++]);
3043	off_t StoredSize = !IsImportingStdCXXModule ? (off_t)Record[Idx++] : 0;
3044	time_t StoredModTime =
3045	!IsImportingStdCXXModule ? (time_t)Record[Idx++] : 0;
3046
3047	ASTFileSignature StoredSignature;
3048	if (!IsImportingStdCXXModule) {
3049	auto FirstSignatureByte = Record.begin() + Idx;
3050	StoredSignature = ASTFileSignature::create(
3051	First: FirstSignatureByte, Last: FirstSignatureByte + ASTFileSignature::size);
3052	Idx += ASTFileSignature::size;
3053	}
3054
3055	std::string ImportedName = ReadString(Record, Idx);
3056	std::string ImportedFile;
3057
3058	// For prebuilt and explicit modules first consult the file map for
3059	// an override. Note that here we don't search prebuilt module
3060	// directories if we're not importing standard c++ module, only the
3061	// explicit name to file mappings. Also, we will still verify the
3062	// size/signature making sure it is essentially the same file but
3063	// perhaps in a different location.
3064	if (ImportedKind == MK_PrebuiltModule || ImportedKind == MK_ExplicitModule)
3065	ImportedFile = PP.getHeaderSearchInfo().getPrebuiltModuleFileName(
3066	ModuleName: ImportedName, /*FileMapOnly*/ !IsImportingStdCXXModule);
3067
3068	// For C++20 Modules, we won't record the path to the imported modules
3069	// in the BMI
3070	if (!IsImportingStdCXXModule) {
3071	if (ImportedFile.empty()) {
3072	// Use BaseDirectoryAsWritten to ensure we use the same path in the
3073	// ModuleCache as when writing.
3074	ImportedFile = ReadPath(BaseDirectory: BaseDirectoryAsWritten, Record, Idx);
3075	} else
3076	SkipPath(Record, Idx);
3077	} else if (ImportedFile.empty()) {
3078	Diag(clang::diag::err_failed_to_find_module_file) << ImportedName;
3079	return Missing;
3080	}
3081
3082	// If our client can't cope with us being out of date, we can't cope with
3083	// our dependency being missing.
3084	unsigned Capabilities = ClientLoadCapabilities;
3085	if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
3086	Capabilities &= ~ARR_Missing;
3087
3088	// Load the AST file.
3089	auto Result = ReadASTCore(FileName: ImportedFile, Type: ImportedKind, ImportLoc, ImportedBy: &F,
3090	Loaded, ExpectedSize: StoredSize, ExpectedModTime: StoredModTime,
3091	ExpectedSignature: StoredSignature, ClientLoadCapabilities: Capabilities);
3092
3093	// If we diagnosed a problem, produce a backtrace.
3094	bool recompilingFinalized =
3095	Result == OutOfDate && (Capabilities & ARR_OutOfDate) &&
3096	getModuleManager().getModuleCache().isPCMFinal(Filename: F.FileName);
3097	if (isDiagnosedResult(Result, Capabilities) || recompilingFinalized)
3098	Diag(diag::note_module_file_imported_by)
3099	<< F.FileName << !F.ModuleName.empty() << F.ModuleName;
3100	if (recompilingFinalized)
3101	Diag(diag::note_module_file_conflict);
3102
3103	switch (Result) {
3104	case Failure: return Failure;
3105	// If we have to ignore the dependency, we'll have to ignore this too.
3106	case Missing:
3107	case OutOfDate: return OutOfDate;
3108	case VersionMismatch: return VersionMismatch;
3109	case ConfigurationMismatch: return ConfigurationMismatch;
3110	case HadErrors: return HadErrors;
3111	case Success: break;
3112	}
3113	}
3114	break;
3115	}
3116
3117	case ORIGINAL_FILE:
3118	F.OriginalSourceFileID = FileID::get(V: Record[0]);
3119	F.ActualOriginalSourceFileName = std::string(Blob);
3120	F.OriginalSourceFileName = F.ActualOriginalSourceFileName;
3121	ResolveImportedPath(M&: F, Filename&: F.OriginalSourceFileName);
3122	break;
3123
3124	case ORIGINAL_FILE_ID:
3125	F.OriginalSourceFileID = FileID::get(V: Record[0]);
3126	break;
3127
3128	case MODULE_NAME:
3129	F.ModuleName = std::string(Blob);
3130	Diag(diag::remark_module_import)
3131	<< F.ModuleName << F.FileName << (ImportedBy ? true : false)
3132	<< (ImportedBy ? StringRef(ImportedBy->ModuleName) : StringRef());
3133	if (Listener)
3134	Listener->ReadModuleName(ModuleName: F.ModuleName);
3135
3136	// Validate the AST as soon as we have a name so we can exit early on
3137	// failure.
3138	if (ASTReadResult Result = readUnhashedControlBlockOnce())
3139	return Result;
3140
3141	break;
3142
3143	case MODULE_DIRECTORY: {
3144	// Save the BaseDirectory as written in the PCM for computing the module
3145	// filename for the ModuleCache.
3146	BaseDirectoryAsWritten = Blob;
3147	assert(!F.ModuleName.empty() &&
3148	"MODULE_DIRECTORY found before MODULE_NAME");
3149	F.BaseDirectory = std::string(Blob);
3150	if (!PP.getPreprocessorOpts().ModulesCheckRelocated)
3151	break;
3152	// If we've already loaded a module map file covering this module, we may
3153	// have a better path for it (relative to the current build).
3154	Module *M = PP.getHeaderSearchInfo().lookupModule(
3155	ModuleName: F.ModuleName, ImportLoc: SourceLocation(), /*AllowSearch*/ true,
3156	/*AllowExtraModuleMapSearch*/ true);
3157	if (M && M->Directory) {
3158	// If we're implicitly loading a module, the base directory can't
3159	// change between the build and use.
3160	// Don't emit module relocation error if we have -fno-validate-pch
3161	if (!bool(PP.getPreprocessorOpts().DisablePCHOrModuleValidation &
3162	DisableValidationForModuleKind::Module) &&
3163	F.Kind != MK_ExplicitModule && F.Kind != MK_PrebuiltModule) {
3164	auto BuildDir = PP.getFileManager().getOptionalDirectoryRef(DirName: Blob);
3165	if (!BuildDir || *BuildDir != M->Directory) {
3166	if (!canRecoverFromOutOfDate(F.FileName, ClientLoadCapabilities))
3167	Diag(diag::err_imported_module_relocated)
3168	<< F.ModuleName << Blob << M->Directory->getName();
3169	return OutOfDate;
3170	}
3171	}
3172	F.BaseDirectory = std::string(M->Directory->getName());
3173	}
3174	break;
3175	}
3176
3177	case MODULE_MAP_FILE:
3178	if (ASTReadResult Result =
3179	ReadModuleMapFileBlock(Record, F, ImportedBy, ClientLoadCapabilities))
3180	return Result;
3181	break;
3182
3183	case INPUT_FILE_OFFSETS:
3184	NumInputs = Record[0];
3185	NumUserInputs = Record[1];
3186	F.InputFileOffsets =
3187	(const llvm::support::unaligned_uint64_t *)Blob.data();
3188	F.InputFilesLoaded.resize(new_size: NumInputs);
3189	F.InputFileInfosLoaded.resize(new_size: NumInputs);
3190	F.NumUserInputFiles = NumUserInputs;
3191	break;
3192	}
3193	}
3194	}
3195
3196	llvm::Error ASTReader::ReadASTBlock(ModuleFile &F,
3197	unsigned ClientLoadCapabilities) {
3198	BitstreamCursor &Stream = F.Stream;
3199
3200	if (llvm::Error Err = Stream.EnterSubBlock(BlockID: AST_BLOCK_ID))
3201	return Err;
3202	F.ASTBlockStartOffset = Stream.GetCurrentBitNo();
3203
3204	// Read all of the records and blocks for the AST file.
3205	RecordData Record;
3206	while (true) {
3207	Expected<llvm::BitstreamEntry> MaybeEntry = Stream.advance();
3208	if (!MaybeEntry)
3209	return MaybeEntry.takeError();
3210	llvm::BitstreamEntry Entry = MaybeEntry.get();
3211
3212	switch (Entry.Kind) {
3213	case llvm::BitstreamEntry::Error:
3214	return llvm::createStringError(
3215	EC: std::errc::illegal_byte_sequence,
3216	Fmt: "error at end of module block in AST file");
3217	case llvm::BitstreamEntry::EndBlock:
3218	// Outside of C++, we do not store a lookup map for the translation unit.
3219	// Instead, mark it as needing a lookup map to be built if this module
3220	// contains any declarations lexically within it (which it always does!).
3221	// This usually has no cost, since we very rarely need the lookup map for
3222	// the translation unit outside C++.
3223	if (ASTContext *Ctx = ContextObj) {
3224	DeclContext *DC = Ctx->getTranslationUnitDecl();
3225	if (DC->hasExternalLexicalStorage() && !Ctx->getLangOpts().CPlusPlus)
3226	DC->setMustBuildLookupTable();
3227	}
3228
3229	return llvm::Error::success();
3230	case llvm::BitstreamEntry::SubBlock:
3231	switch (Entry.ID) {
3232	case DECLTYPES_BLOCK_ID:
3233	// We lazily load the decls block, but we want to set up the
3234	// DeclsCursor cursor to point into it. Clone our current bitcode
3235	// cursor to it, enter the block and read the abbrevs in that block.
3236	// With the main cursor, we just skip over it.
3237	F.DeclsCursor = Stream;
3238	if (llvm::Error Err = Stream.SkipBlock())
3239	return Err;
3240	if (llvm::Error Err = ReadBlockAbbrevs(
3241	Cursor&: F.DeclsCursor, BlockID: DECLTYPES_BLOCK_ID, StartOfBlockOffset: &F.DeclsBlockStartOffset))
3242	return Err;
3243	break;
3244
3245	case PREPROCESSOR_BLOCK_ID:
3246	F.MacroCursor = Stream;
3247	if (!PP.getExternalSource())
3248	PP.setExternalSource(this);
3249
3250	if (llvm::Error Err = Stream.SkipBlock())
3251	return Err;
3252	if (llvm::Error Err =
3253	ReadBlockAbbrevs(Cursor&: F.MacroCursor, BlockID: PREPROCESSOR_BLOCK_ID))
3254	return Err;
3255	F.MacroStartOffset = F.MacroCursor.GetCurrentBitNo();
3256	break;
3257
3258	case PREPROCESSOR_DETAIL_BLOCK_ID:
3259	F.PreprocessorDetailCursor = Stream;
3260
3261	if (llvm::Error Err = Stream.SkipBlock()) {
3262	return Err;
3263	}
3264	if (llvm::Error Err = ReadBlockAbbrevs(Cursor&: F.PreprocessorDetailCursor,
3265	BlockID: PREPROCESSOR_DETAIL_BLOCK_ID))
3266	return Err;
3267	F.PreprocessorDetailStartOffset
3268	= F.PreprocessorDetailCursor.GetCurrentBitNo();
3269
3270	if (!PP.getPreprocessingRecord())
3271	PP.createPreprocessingRecord();
3272	if (!PP.getPreprocessingRecord()->getExternalSource())
3273	PP.getPreprocessingRecord()->SetExternalSource(*this);
3274	break;
3275
3276	case SOURCE_MANAGER_BLOCK_ID:
3277	if (llvm::Error Err = ReadSourceManagerBlock(F))
3278	return Err;
3279	break;
3280
3281	case SUBMODULE_BLOCK_ID:
3282	if (llvm::Error Err = ReadSubmoduleBlock(F, ClientLoadCapabilities))
3283	return Err;
3284	break;
3285
3286	case COMMENTS_BLOCK_ID: {
3287	BitstreamCursor C = Stream;
3288
3289	if (llvm::Error Err = Stream.SkipBlock())
3290	return Err;
3291	if (llvm::Error Err = ReadBlockAbbrevs(Cursor&: C, BlockID: COMMENTS_BLOCK_ID))
3292	return Err;
3293	CommentsCursors.push_back(Elt: std::make_pair(x&: C, y: &F));
3294	break;
3295	}
3296
3297	default:
3298	if (llvm::Error Err = Stream.SkipBlock())
3299	return Err;
3300	break;
3301	}
3302	continue;
3303
3304	case llvm::BitstreamEntry::Record:
3305	// The interesting case.
3306	break;
3307	}
3308
3309	// Read and process a record.
3310	Record.clear();
3311	StringRef Blob;
3312	Expected<unsigned> MaybeRecordType =
3313	Stream.readRecord(AbbrevID: Entry.ID, Vals&: Record, Blob: &Blob);
3314	if (!MaybeRecordType)
3315	return MaybeRecordType.takeError();
3316	ASTRecordTypes RecordType = (ASTRecordTypes)MaybeRecordType.get();
3317
3318	// If we're not loading an AST context, we don't care about most records.
3319	if (!ContextObj) {
3320	switch (RecordType) {
3321	case IDENTIFIER_TABLE:
3322	case IDENTIFIER_OFFSET:
3323	case INTERESTING_IDENTIFIERS:
3324	case STATISTICS:
3325	case PP_ASSUME_NONNULL_LOC:
3326	case PP_CONDITIONAL_STACK:
3327	case PP_COUNTER_VALUE:
3328	case SOURCE_LOCATION_OFFSETS:
3329	case MODULE_OFFSET_MAP:
3330	case SOURCE_MANAGER_LINE_TABLE:
3331	case PPD_ENTITIES_OFFSETS:
3332	case HEADER_SEARCH_TABLE:
3333	case IMPORTED_MODULES:
3334	case MACRO_OFFSET:
3335	break;
3336	default:
3337	continue;
3338	}
3339	}
3340
3341	switch (RecordType) {
3342	default: // Default behavior: ignore.
3343	break;
3344
3345	case TYPE_OFFSET: {
3346	if (F.LocalNumTypes != 0)
3347	return llvm::createStringError(
3348	EC: std::errc::illegal_byte_sequence,
3349	Fmt: "duplicate TYPE_OFFSET record in AST file");
3350	F.TypeOffsets = reinterpret_cast<const UnderalignedInt64 *>(Blob.data());
3351	F.LocalNumTypes = Record[0];
3352	unsigned LocalBaseTypeIndex = Record[1];
3353	F.BaseTypeIndex = getTotalNumTypes();
3354
3355	if (F.LocalNumTypes > 0) {
3356	// Introduce the global -> local mapping for types within this module.
3357	GlobalTypeMap.insert(Val: std::make_pair(x: getTotalNumTypes(), y: &F));
3358
3359	// Introduce the local -> global mapping for types within this module.
3360	F.TypeRemap.insertOrReplace(
3361	Val: std::make_pair(x&: LocalBaseTypeIndex,
3362	y: F.BaseTypeIndex - LocalBaseTypeIndex));
3363
3364	TypesLoaded.resize(NewSize: TypesLoaded.size() + F.LocalNumTypes);
3365	}
3366	break;
3367	}
3368
3369	case DECL_OFFSET: {
3370	if (F.LocalNumDecls != 0)
3371	return llvm::createStringError(
3372	EC: std::errc::illegal_byte_sequence,
3373	Fmt: "duplicate DECL_OFFSET record in AST file");
3374	F.DeclOffsets = (const DeclOffset *)Blob.data();
3375	F.LocalNumDecls = Record[0];
3376	unsigned LocalBaseDeclID = Record[1];
3377	F.BaseDeclID = getTotalNumDecls();
3378
3379	if (F.LocalNumDecls > 0) {
3380	// Introduce the global -> local mapping for declarations within this
3381	// module.
3382	GlobalDeclMap.insert(
3383	Val: std::make_pair(x: getTotalNumDecls() + NUM_PREDEF_DECL_IDS, y: &F));
3384
3385	// Introduce the local -> global mapping for declarations within this
3386	// module.
3387	F.DeclRemap.insertOrReplace(
3388	Val: std::make_pair(x&: LocalBaseDeclID, y: F.BaseDeclID - LocalBaseDeclID));
3389
3390	// Introduce the global -> local mapping for declarations within this
3391	// module.
3392	F.GlobalToLocalDeclIDs[&F] = LocalBaseDeclID;
3393
3394	DeclsLoaded.resize(NewSize: DeclsLoaded.size() + F.LocalNumDecls);
3395	}
3396	break;
3397	}
3398
3399	case TU_UPDATE_LEXICAL: {
3400	DeclContext *TU = ContextObj->getTranslationUnitDecl();
3401	LexicalContents Contents(
3402	reinterpret_cast<const llvm::support::unaligned_uint32_t *>(
3403	Blob.data()),
3404	static_cast<unsigned int>(Blob.size() / 4));
3405	TULexicalDecls.push_back(x: std::make_pair(x: &F, y&: Contents));
3406	TU->setHasExternalLexicalStorage(true);
3407	break;
3408	}
3409
3410	case UPDATE_VISIBLE: {
3411	unsigned Idx = 0;
3412	serialization::DeclID ID = ReadDeclID(F, Record, Idx);
3413	auto *Data = (const unsigned char*)Blob.data();
3414	PendingVisibleUpdates[ID].push_back(Elt: PendingVisibleUpdate{.Mod: &F, .Data: Data});
3415	// If we've already loaded the decl, perform the updates when we finish
3416	// loading this block.
3417	if (Decl *D = GetExistingDecl(ID))
3418	PendingUpdateRecords.push_back(
3419	Elt: PendingUpdateRecord(ID, D, /*JustLoaded=*/false));
3420	break;
3421	}
3422
3423	case IDENTIFIER_TABLE:
3424	F.IdentifierTableData =
3425	reinterpret_cast<const unsigned char *>(Blob.data());
3426	if (Record[0]) {
3427	F.IdentifierLookupTable = ASTIdentifierLookupTable::Create(
3428	Buckets: F.IdentifierTableData + Record[0],
3429	Payload: F.IdentifierTableData + sizeof(uint32_t),
3430	Base: F.IdentifierTableData,
3431	InfoObj: ASTIdentifierLookupTrait(*this, F));
3432
3433	PP.getIdentifierTable().setExternalIdentifierLookup(this);
3434	}
3435	break;
3436
3437	case IDENTIFIER_OFFSET: {
3438	if (F.LocalNumIdentifiers != 0)
3439	return llvm::createStringError(
3440	EC: std::errc::illegal_byte_sequence,
3441	Fmt: "duplicate IDENTIFIER_OFFSET record in AST file");
3442	F.IdentifierOffsets = (const uint32_t *)Blob.data();
3443	F.LocalNumIdentifiers = Record[0];
3444	unsigned LocalBaseIdentifierID = Record[1];
3445	F.BaseIdentifierID = getTotalNumIdentifiers();
3446
3447	if (F.LocalNumIdentifiers > 0) {
3448	// Introduce the global -> local mapping for identifiers within this
3449	// module.
3450	GlobalIdentifierMap.insert(Val: std::make_pair(x: getTotalNumIdentifiers() + 1,
3451	y: &F));
3452
3453	// Introduce the local -> global mapping for identifiers within this
3454	// module.
3455	F.IdentifierRemap.insertOrReplace(
3456	Val: std::make_pair(x&: LocalBaseIdentifierID,
3457	y: F.BaseIdentifierID - LocalBaseIdentifierID));
3458
3459	IdentifiersLoaded.resize(new_size: IdentifiersLoaded.size()
3460	+ F.LocalNumIdentifiers);
3461	}
3462	break;
3463	}
3464
3465	case INTERESTING_IDENTIFIERS:
3466	F.PreloadIdentifierOffsets.assign(first: Record.begin(), last: Record.end());
3467	break;
3468
3469	case EAGERLY_DESERIALIZED_DECLS:
3470	// FIXME: Skip reading this record if our ASTConsumer doesn't care
3471	// about "interesting" decls (for instance, if we're building a module).
3472	for (unsigned I = 0, N = Record.size(); I != N; ++I)
3473	EagerlyDeserializedDecls.push_back(Elt: getGlobalDeclID(F, LocalID: Record[I]));
3474	break;
3475
3476	case MODULAR_CODEGEN_DECLS:
3477	// FIXME: Skip reading this record if our ASTConsumer doesn't care about
3478	// them (ie: if we're not codegenerating this module).
3479	if (F.Kind == MK_MainFile ||
3480	getContext().getLangOpts().BuildingPCHWithObjectFile)
3481	for (unsigned I = 0, N = Record.size(); I != N; ++I)
3482	EagerlyDeserializedDecls.push_back(Elt: getGlobalDeclID(F, LocalID: Record[I]));
3483	break;
3484
3485	case SPECIAL_TYPES:
3486	if (SpecialTypes.empty()) {
3487	for (unsigned I = 0, N = Record.size(); I != N; ++I)
3488	SpecialTypes.push_back(Elt: getGlobalTypeID(F, LocalID: Record[I]));
3489	break;
3490	}
3491
3492	if (SpecialTypes.size() != Record.size())
3493	return llvm::createStringError(EC: std::errc::illegal_byte_sequence,
3494	Fmt: "invalid special-types record");
3495
3496	for (unsigned I = 0, N = Record.size(); I != N; ++I) {
3497	serialization::TypeID ID = getGlobalTypeID(F, LocalID: Record[I]);
3498	if (!SpecialTypes[I])
3499	SpecialTypes[I] = ID;
3500	// FIXME: If ID && SpecialTypes[I] != ID, do we need a separate
3501	// merge step?
3502	}
3503	break;
3504
3505	case STATISTICS:
3506	TotalNumStatements += Record[0];
3507	TotalNumMacros += Record[1];
3508	TotalLexicalDeclContexts += Record[2];
3509	TotalVisibleDeclContexts += Record[3];
3510	break;
3511
3512	case UNUSED_FILESCOPED_DECLS:
3513	for (unsigned I = 0, N = Record.size(); I != N; ++I)
3514	UnusedFileScopedDecls.push_back(Elt: getGlobalDeclID(F, LocalID: Record[I]));
3515	break;
3516
3517	case DELEGATING_CTORS:
3518	for (unsigned I = 0, N = Record.size(); I != N; ++I)
3519	DelegatingCtorDecls.push_back(Elt: getGlobalDeclID(F, LocalID: Record[I]));
3520	break;
3521
3522	case WEAK_UNDECLARED_IDENTIFIERS:
3523	if (Record.size() % 3 != 0)
3524	return llvm::createStringError(EC: std::errc::illegal_byte_sequence,
3525	Fmt: "invalid weak identifiers record");
3526
3527	// FIXME: Ignore weak undeclared identifiers from non-original PCH
3528	// files. This isn't the way to do it :)
3529	WeakUndeclaredIdentifiers.clear();
3530
3531	// Translate the weak, undeclared identifiers into global IDs.
3532	for (unsigned I = 0, N = Record.size(); I < N; /* in loop */) {
3533	WeakUndeclaredIdentifiers.push_back(
3534	Elt: getGlobalIdentifierID(M&: F, LocalID: Record[I++]));
3535	WeakUndeclaredIdentifiers.push_back(
3536	Elt: getGlobalIdentifierID(M&: F, LocalID: Record[I++]));
3537	WeakUndeclaredIdentifiers.push_back(
3538	Elt: ReadSourceLocation(ModuleFile&: F, Record, Idx&: I).getRawEncoding());
3539	}
3540	break;
3541
3542	case SELECTOR_OFFSETS: {
3543	F.SelectorOffsets = (const uint32_t *)Blob.data();
3544	F.LocalNumSelectors = Record[0];
3545	unsigned LocalBaseSelectorID = Record[1];
3546	F.BaseSelectorID = getTotalNumSelectors();
3547
3548	if (F.LocalNumSelectors > 0) {
3549	// Introduce the global -> local mapping for selectors within this
3550	// module.
3551	GlobalSelectorMap.insert(Val: std::make_pair(x: getTotalNumSelectors()+1, y: &F));
3552
3553	// Introduce the local -> global mapping for selectors within this
3554	// module.
3555	F.SelectorRemap.insertOrReplace(
3556	Val: std::make_pair(x&: LocalBaseSelectorID,
3557	y: F.BaseSelectorID - LocalBaseSelectorID));
3558
3559	SelectorsLoaded.resize(N: SelectorsLoaded.size() + F.LocalNumSelectors);
3560	}
3561	break;
3562	}
3563
3564	case METHOD_POOL:
3565	F.SelectorLookupTableData = (const unsigned char *)Blob.data();
3566	if (Record[0])
3567	F.SelectorLookupTable
3568	= ASTSelectorLookupTable::Create(
3569	Buckets: F.SelectorLookupTableData + Record[0],
3570	Base: F.SelectorLookupTableData,
3571	InfoObj: ASTSelectorLookupTrait(*this, F));
3572	TotalNumMethodPoolEntries += Record[1];
3573	break;
3574
3575	case REFERENCED_SELECTOR_POOL:
3576	if (!Record.empty()) {
3577	for (unsigned Idx = 0, N = Record.size() - 1; Idx < N; /* in loop */) {
3578	ReferencedSelectorsData.push_back(Elt: getGlobalSelectorID(M&: F,
3579	LocalID: Record[Idx++]));
3580	ReferencedSelectorsData.push_back(Elt: ReadSourceLocation(ModuleFile&: F, Record, Idx).
3581	getRawEncoding());
3582	}
3583	}
3584	break;
3585
3586	case PP_ASSUME_NONNULL_LOC: {
3587	unsigned Idx = 0;
3588	if (!Record.empty())
3589	PP.setPreambleRecordedPragmaAssumeNonNullLoc(
3590	ReadSourceLocation(ModuleFile&: F, Record, Idx));
3591	break;
3592	}
3593
3594	case PP_CONDITIONAL_STACK:
3595	if (!Record.empty()) {
3596	unsigned Idx = 0, End = Record.size() - 1;
3597	bool ReachedEOFWhileSkipping = Record[Idx++];
3598	std::optional<Preprocessor::PreambleSkipInfo> SkipInfo;
3599	if (ReachedEOFWhileSkipping) {
3600	SourceLocation HashToken = ReadSourceLocation(ModuleFile&: F, Record, Idx);
3601	SourceLocation IfTokenLoc = ReadSourceLocation(ModuleFile&: F, Record, Idx);
3602	bool FoundNonSkipPortion = Record[Idx++];
3603	bool FoundElse = Record[Idx++];
3604	SourceLocation ElseLoc = ReadSourceLocation(ModuleFile&: F, Record, Idx);
3605	SkipInfo.emplace(args&: HashToken, args&: IfTokenLoc, args&: FoundNonSkipPortion,
3606	args&: FoundElse, args&: ElseLoc);
3607	}
3608	SmallVector<PPConditionalInfo, 4> ConditionalStack;
3609	while (Idx < End) {
3610	auto Loc = ReadSourceLocation(ModuleFile&: F, Record, Idx);
3611	bool WasSkipping = Record[Idx++];
3612	bool FoundNonSkip = Record[Idx++];
3613	bool FoundElse = Record[Idx++];
3614	ConditionalStack.push_back(
3615	Elt: {.IfLoc: Loc, .WasSkipping: WasSkipping, .FoundNonSkip: FoundNonSkip, .FoundElse: FoundElse});
3616	}
3617	PP.setReplayablePreambleConditionalStack(s: ConditionalStack, SkipInfo);
3618	}
3619	break;
3620
3621	case PP_COUNTER_VALUE:
3622	if (!Record.empty() && Listener)
3623	Listener->ReadCounter(M: F, Value: Record[0]);
3624	break;
3625
3626	case FILE_SORTED_DECLS:
3627	F.FileSortedDecls = (const DeclID *)Blob.data();
3628	F.NumFileSortedDecls = Record[0];
3629	break;
3630
3631	case SOURCE_LOCATION_OFFSETS: {
3632	F.SLocEntryOffsets = (const uint32_t *)Blob.data();
3633	F.LocalNumSLocEntries = Record[0];
3634	SourceLocation::UIntTy SLocSpaceSize = Record[1];
3635	F.SLocEntryOffsetsBase = Record[2] + F.SourceManagerBlockStartOffset;
3636	std::tie(args&: F.SLocEntryBaseID, args&: F.SLocEntryBaseOffset) =
3637	SourceMgr.AllocateLoadedSLocEntries(NumSLocEntries: F.LocalNumSLocEntries,
3638	TotalSize: SLocSpaceSize);
3639	if (!F.SLocEntryBaseID) {
3640	if (!Diags.isDiagnosticInFlight()) {
3641	Diags.Report(SourceLocation(), diag::remark_sloc_usage);
3642	SourceMgr.noteSLocAddressSpaceUsage(Diag&: Diags);
3643	}
3644	return llvm::createStringError(EC: std::errc::invalid_argument,
3645	Fmt: "ran out of source locations");
3646	}
3647	// Make our entry in the range map. BaseID is negative and growing, so
3648	// we invert it. Because we invert it, though, we need the other end of
3649	// the range.
3650	unsigned RangeStart =
3651	unsigned(-F.SLocEntryBaseID) - F.LocalNumSLocEntries + 1;
3652	GlobalSLocEntryMap.insert(Val: std::make_pair(x&: RangeStart, y: &F));
3653	F.FirstLoc = SourceLocation::getFromRawEncoding(Encoding: F.SLocEntryBaseOffset);
3654
3655	// SLocEntryBaseOffset is lower than MaxLoadedOffset and decreasing.
3656	assert((F.SLocEntryBaseOffset & SourceLocation::MacroIDBit) == 0);
3657	GlobalSLocOffsetMap.insert(
3658	Val: std::make_pair(x: SourceManager::MaxLoadedOffset - F.SLocEntryBaseOffset
3659	- SLocSpaceSize,y: &F));
3660
3661	// Initialize the remapping table.
3662	// Invalid stays invalid.
3663	F.SLocRemap.insertOrReplace(Val: std::make_pair(x: 0U, y: 0));
3664	// This module. Base was 2 when being compiled.
3665	F.SLocRemap.insertOrReplace(Val: std::make_pair(
3666	x: 2U, y: static_cast<SourceLocation::IntTy>(F.SLocEntryBaseOffset - 2)));
3667
3668	TotalNumSLocEntries += F.LocalNumSLocEntries;
3669	break;
3670	}
3671
3672	case MODULE_OFFSET_MAP:
3673	F.ModuleOffsetMap = Blob;
3674	break;
3675
3676	case SOURCE_MANAGER_LINE_TABLE:
3677	ParseLineTable(F, Record);
3678	break;
3679
3680	case EXT_VECTOR_DECLS:
3681	for (unsigned I = 0, N = Record.size(); I != N; ++I)
3682	ExtVectorDecls.push_back(Elt: getGlobalDeclID(F, LocalID: Record[I]));
3683	break;
3684
3685	case VTABLE_USES:
3686	if (Record.size() % 3 != 0)
3687	return llvm::createStringError(EC: std::errc::illegal_byte_sequence,
3688	Fmt: "Invalid VTABLE_USES record");
3689
3690	// Later tables overwrite earlier ones.
3691	// FIXME: Modules will have some trouble with this. This is clearly not
3692	// the right way to do this.
3693	VTableUses.clear();
3694
3695	for (unsigned Idx = 0, N = Record.size(); Idx != N; /* In loop */) {
3696	VTableUses.push_back(Elt: getGlobalDeclID(F, LocalID: Record[Idx++]));
3697	VTableUses.push_back(
3698	Elt: ReadSourceLocation(ModuleFile&: F, Record, Idx).getRawEncoding());
3699	VTableUses.push_back(Elt: Record[Idx++]);
3700	}
3701	break;
3702
3703	case PENDING_IMPLICIT_INSTANTIATIONS:
3704	if (PendingInstantiations.size() % 2 != 0)
3705	return llvm::createStringError(
3706	EC: std::errc::illegal_byte_sequence,
3707	Fmt: "Invalid existing PendingInstantiations");
3708
3709	if (Record.size() % 2 != 0)
3710	return llvm::createStringError(
3711	EC: std::errc::illegal_byte_sequence,
3712	Fmt: "Invalid PENDING_IMPLICIT_INSTANTIATIONS block");
3713
3714	for (unsigned I = 0, N = Record.size(); I != N; /* in loop */) {
3715	PendingInstantiations.push_back(Elt: getGlobalDeclID(F, LocalID: Record[I++]));
3716	PendingInstantiations.push_back(
3717	Elt: ReadSourceLocation(ModuleFile&: F, Record, Idx&: I).getRawEncoding());
3718	}
3719	break;
3720
3721	case SEMA_DECL_REFS:
3722	if (Record.size() != 3)
3723	return llvm::createStringError(EC: std::errc::illegal_byte_sequence,
3724	Fmt: "Invalid SEMA_DECL_REFS block");
3725	for (unsigned I = 0, N = Record.size(); I != N; ++I)
3726	SemaDeclRefs.push_back(Elt: getGlobalDeclID(F, LocalID: Record[I]));
3727	break;
3728
3729	case PPD_ENTITIES_OFFSETS: {
3730	F.PreprocessedEntityOffsets = (const PPEntityOffset *)Blob.data();
3731	assert(Blob.size() % sizeof(PPEntityOffset) == 0);
3732	F.NumPreprocessedEntities = Blob.size() / sizeof(PPEntityOffset);
3733
3734	unsigned LocalBasePreprocessedEntityID = Record[0];
3735
3736	unsigned StartingID;
3737	if (!PP.getPreprocessingRecord())
3738	PP.createPreprocessingRecord();
3739	if (!PP.getPreprocessingRecord()->getExternalSource())
3740	PP.getPreprocessingRecord()->SetExternalSource(*this);
3741	StartingID
3742	= PP.getPreprocessingRecord()
3743	->allocateLoadedEntities(NumEntities: F.NumPreprocessedEntities);
3744	F.BasePreprocessedEntityID = StartingID;
3745
3746	if (F.NumPreprocessedEntities > 0) {
3747	// Introduce the global -> local mapping for preprocessed entities in
3748	// this module.
3749	GlobalPreprocessedEntityMap.insert(Val: std::make_pair(x&: StartingID, y: &F));
3750
3751	// Introduce the local -> global mapping for preprocessed entities in
3752	// this module.
3753	F.PreprocessedEntityRemap.insertOrReplace(
3754	Val: std::make_pair(x&: LocalBasePreprocessedEntityID,
3755	y: F.BasePreprocessedEntityID - LocalBasePreprocessedEntityID));
3756	}
3757
3758	break;
3759	}
3760
3761	case PPD_SKIPPED_RANGES: {
3762	F.PreprocessedSkippedRangeOffsets = (const PPSkippedRange*)Blob.data();
3763	assert(Blob.size() % sizeof(PPSkippedRange) == 0);
3764	F.NumPreprocessedSkippedRanges = Blob.size() / sizeof(PPSkippedRange);
3765
3766	if (!PP.getPreprocessingRecord())
3767	PP.createPreprocessingRecord();
3768	if (!PP.getPreprocessingRecord()->getExternalSource())
3769	PP.getPreprocessingRecord()->SetExternalSource(*this);
3770	F.BasePreprocessedSkippedRangeID = PP.getPreprocessingRecord()
3771	->allocateSkippedRanges(NumRanges: F.NumPreprocessedSkippedRanges);
3772
3773	if (F.NumPreprocessedSkippedRanges > 0)
3774	GlobalSkippedRangeMap.insert(
3775	Val: std::make_pair(x&: F.BasePreprocessedSkippedRangeID, y: &F));
3776	break;
3777	}
3778
3779	case DECL_UPDATE_OFFSETS:
3780	if (Record.size() % 2 != 0)
3781	return llvm::createStringError(
3782	EC: std::errc::illegal_byte_sequence,
3783	Fmt: "invalid DECL_UPDATE_OFFSETS block in AST file");
3784	for (unsigned I = 0, N = Record.size(); I != N; I += 2) {
3785	GlobalDeclID ID = getGlobalDeclID(F, LocalID: Record[I]);
3786	DeclUpdateOffsets[ID].push_back(Elt: std::make_pair(x: &F, y&: Record[I + 1]));
3787
3788	// If we've already loaded the decl, perform the updates when we finish
3789	// loading this block.
3790	if (Decl *D = GetExistingDecl(ID))
3791	PendingUpdateRecords.push_back(
3792	Elt: PendingUpdateRecord(ID, D, /*JustLoaded=*/false));
3793	}
3794	break;
3795
3796	case OBJC_CATEGORIES_MAP:
3797	if (F.LocalNumObjCCategoriesInMap != 0)
3798	return llvm::createStringError(
3799	EC: std::errc::illegal_byte_sequence,
3800	Fmt: "duplicate OBJC_CATEGORIES_MAP record in AST file");
3801
3802	F.LocalNumObjCCategoriesInMap = Record[0];
3803	F.ObjCCategoriesMap = (const ObjCCategoriesInfo *)Blob.data();
3804	break;
3805
3806	case OBJC_CATEGORIES:
3807	F.ObjCCategories.swap(RHS&: Record);
3808	break;
3809
3810	case CUDA_SPECIAL_DECL_REFS:
3811	// Later tables overwrite earlier ones.
3812	// FIXME: Modules will have trouble with this.
3813	CUDASpecialDeclRefs.clear();
3814	for (unsigned I = 0, N = Record.size(); I != N; ++I)
3815	CUDASpecialDeclRefs.push_back(Elt: getGlobalDeclID(F, LocalID: Record[I]));
3816	break;
3817
3818	case HEADER_SEARCH_TABLE:
3819	F.HeaderFileInfoTableData = Blob.data();
3820	F.LocalNumHeaderFileInfos = Record[1];
3821	if (Record[0]) {
3822	F.HeaderFileInfoTable
3823	= HeaderFileInfoLookupTable::Create(
3824	Buckets: (const unsigned char *)F.HeaderFileInfoTableData + Record[0],
3825	Base: (const unsigned char *)F.HeaderFileInfoTableData,
3826	InfoObj: HeaderFileInfoTrait(*this, F,
3827	&PP.getHeaderSearchInfo(),
3828	Blob.data() + Record[2]));
3829
3830	PP.getHeaderSearchInfo().SetExternalSource(this);
3831	if (!PP.getHeaderSearchInfo().getExternalLookup())
3832	PP.getHeaderSearchInfo().SetExternalLookup(this);
3833	}
3834	break;
3835
3836	case FP_PRAGMA_OPTIONS:
3837	// Later tables overwrite earlier ones.
3838	FPPragmaOptions.swap(RHS&: Record);
3839	break;
3840
3841	case OPENCL_EXTENSIONS:
3842	for (unsigned I = 0, E = Record.size(); I != E; ) {
3843	auto Name = ReadString(Record, Idx&: I);
3844	auto &OptInfo = OpenCLExtensions.OptMap[Name];
3845	OptInfo.Supported = Record[I++] != 0;
3846	OptInfo.Enabled = Record[I++] != 0;
3847	OptInfo.WithPragma = Record[I++] != 0;
3848	OptInfo.Avail = Record[I++];
3849	OptInfo.Core = Record[I++];
3850	OptInfo.Opt = Record[I++];
3851	}
3852	break;
3853
3854	case TENTATIVE_DEFINITIONS:
3855	for (unsigned I = 0, N = Record.size(); I != N; ++I)
3856	TentativeDefinitions.push_back(Elt: getGlobalDeclID(F, LocalID: Record[I]));
3857	break;
3858
3859	case KNOWN_NAMESPACES:
3860	for (unsigned I = 0, N = Record.size(); I != N; ++I)
3861	KnownNamespaces.push_back(Elt: getGlobalDeclID(F, LocalID: Record[I]));
3862	break;
3863
3864	case UNDEFINED_BUT_USED:
3865	if (UndefinedButUsed.size() % 2 != 0)
3866	return llvm::createStringError(EC: std::errc::illegal_byte_sequence,
3867	Fmt: "Invalid existing UndefinedButUsed");
3868
3869	if (Record.size() % 2 != 0)
3870	return llvm::createStringError(EC: std::errc::illegal_byte_sequence,
3871	Fmt: "invalid undefined-but-used record");
3872	for (unsigned I = 0, N = Record.size(); I != N; /* in loop */) {
3873	UndefinedButUsed.push_back(Elt: getGlobalDeclID(F, LocalID: Record[I++]));
3874	UndefinedButUsed.push_back(
3875	Elt: ReadSourceLocation(ModuleFile&: F, Record, Idx&: I).getRawEncoding());
3876	}
3877	break;
3878
3879	case DELETE_EXPRS_TO_ANALYZE:
3880	for (unsigned I = 0, N = Record.size(); I != N;) {
3881	DelayedDeleteExprs.push_back(Elt: getGlobalDeclID(F, LocalID: Record[I++]));
3882	const uint64_t Count = Record[I++];
3883	DelayedDeleteExprs.push_back(Elt: Count);
3884	for (uint64_t C = 0; C < Count; ++C) {
3885	DelayedDeleteExprs.push_back(Elt: ReadSourceLocation(ModuleFile&: F, Record, Idx&: I).getRawEncoding());
3886	bool IsArrayForm = Record[I++] == 1;
3887	DelayedDeleteExprs.push_back(Elt: IsArrayForm);
3888	}
3889	}
3890	break;
3891
3892	case IMPORTED_MODULES:
3893	if (!F.isModule()) {
3894	// If we aren't loading a module (which has its own exports), make
3895	// all of the imported modules visible.
3896	// FIXME: Deal with macros-only imports.
3897	for (unsigned I = 0, N = Record.size(); I != N; /**/) {
3898	unsigned GlobalID = getGlobalSubmoduleID(M&: F, LocalID: Record[I++]);
3899	SourceLocation Loc = ReadSourceLocation(ModuleFile&: F, Record, Idx&: I);
3900	if (GlobalID) {
3901	PendingImportedModules.push_back(Elt: ImportedSubmodule(GlobalID, Loc));
3902	if (DeserializationListener)
3903	DeserializationListener->ModuleImportRead(ID: GlobalID, ImportLoc: Loc);
3904	}
3905	}
3906	}
3907	break;
3908
3909	case MACRO_OFFSET: {
3910	if (F.LocalNumMacros != 0)
3911	return llvm::createStringError(
3912	EC: std::errc::illegal_byte_sequence,
3913	Fmt: "duplicate MACRO_OFFSET record in AST file");
3914	F.MacroOffsets = (const uint32_t *)Blob.data();
3915	F.LocalNumMacros = Record[0];
3916	unsigned LocalBaseMacroID = Record[1];
3917	F.MacroOffsetsBase = Record[2] + F.ASTBlockStartOffset;
3918	F.BaseMacroID = getTotalNumMacros();
3919
3920	if (F.LocalNumMacros > 0) {
3921	// Introduce the global -> local mapping for macros within this module.
3922	GlobalMacroMap.insert(Val: std::make_pair(x: getTotalNumMacros() + 1, y: &F));
3923
3924	// Introduce the local -> global mapping for macros within this module.
3925	F.MacroRemap.insertOrReplace(
3926	Val: std::make_pair(x&: LocalBaseMacroID,
3927	y: F.BaseMacroID - LocalBaseMacroID));
3928
3929	MacrosLoaded.resize(new_size: MacrosLoaded.size() + F.LocalNumMacros);
3930	}
3931	break;
3932	}
3933
3934	case LATE_PARSED_TEMPLATE:
3935	LateParsedTemplates.emplace_back(
3936	Args: std::piecewise_construct, Args: std::forward_as_tuple(args: &F),
3937	Args: std::forward_as_tuple(args: Record.begin(), args: Record.end()));
3938	break;
3939
3940	case OPTIMIZE_PRAGMA_OPTIONS:
3941	if (Record.size() != 1)
3942	return llvm::createStringError(EC: std::errc::illegal_byte_sequence,
3943	Fmt: "invalid pragma optimize record");
3944	OptimizeOffPragmaLocation = ReadSourceLocation(ModuleFile&: F, Raw: Record[0]);
3945	break;
3946
3947	case MSSTRUCT_PRAGMA_OPTIONS:
3948	if (Record.size() != 1)
3949	return llvm::createStringError(EC: std::errc::illegal_byte_sequence,
3950	Fmt: "invalid pragma ms_struct record");
3951	PragmaMSStructState = Record[0];
3952	break;
3953
3954	case POINTERS_TO_MEMBERS_PRAGMA_OPTIONS:
3955	if (Record.size() != 2)
3956	return llvm::createStringError(
3957	EC: std::errc::illegal_byte_sequence,
3958	Fmt: "invalid pragma pointers to members record");
3959	PragmaMSPointersToMembersState = Record[0];
3960	PointersToMembersPragmaLocation = ReadSourceLocation(ModuleFile&: F, Raw: Record[1]);
3961	break;
3962
3963	case UNUSED_LOCAL_TYPEDEF_NAME_CANDIDATES:
3964	for (unsigned I = 0, N = Record.size(); I != N; ++I)
3965	UnusedLocalTypedefNameCandidates.push_back(
3966	Elt: getGlobalDeclID(F, LocalID: Record[I]));
3967	break;
3968
3969	case CUDA_PRAGMA_FORCE_HOST_DEVICE_DEPTH:
3970	if (Record.size() != 1)
3971	return llvm::createStringError(EC: std::errc::illegal_byte_sequence,
3972	Fmt: "invalid cuda pragma options record");
3973	ForceCUDAHostDeviceDepth = Record[0];
3974	break;
3975
3976	case ALIGN_PACK_PRAGMA_OPTIONS: {
3977	if (Record.size() < 3)
3978	return llvm::createStringError(EC: std::errc::illegal_byte_sequence,
3979	Fmt: "invalid pragma pack record");
3980	PragmaAlignPackCurrentValue = ReadAlignPackInfo(Raw: Record[0]);
3981	PragmaAlignPackCurrentLocation = ReadSourceLocation(ModuleFile&: F, Raw: Record[1]);
3982	unsigned NumStackEntries = Record[2];
3983	unsigned Idx = 3;
3984	// Reset the stack when importing a new module.
3985	PragmaAlignPackStack.clear();
3986	for (unsigned I = 0; I < NumStackEntries; ++I) {
3987	PragmaAlignPackStackEntry Entry;
3988	Entry.Value = ReadAlignPackInfo(Raw: Record[Idx++]);
3989	Entry.Location = ReadSourceLocation(ModuleFile&: F, Raw: Record[Idx++]);
3990	Entry.PushLocation = ReadSourceLocation(ModuleFile&: F, Raw: Record[Idx++]);
3991	PragmaAlignPackStrings.push_back(Elt: ReadString(Record, Idx));
3992	Entry.SlotLabel = PragmaAlignPackStrings.back();
3993	PragmaAlignPackStack.push_back(Elt: Entry);
3994	}
3995	break;
3996	}
3997
3998	case FLOAT_CONTROL_PRAGMA_OPTIONS: {
3999	if (Record.size() < 3)
4000	return llvm::createStringError(EC: std::errc::illegal_byte_sequence,
4001	Fmt: "invalid pragma float control record");
4002	FpPragmaCurrentValue = FPOptionsOverride::getFromOpaqueInt(I: Record[0]);
4003	FpPragmaCurrentLocation = ReadSourceLocation(ModuleFile&: F, Raw: Record[1]);
4004	unsigned NumStackEntries = Record[2];
4005	unsigned Idx = 3;
4006	// Reset the stack when importing a new module.
4007	FpPragmaStack.clear();
4008	for (unsigned I = 0; I < NumStackEntries; ++I) {
4009	FpPragmaStackEntry Entry;
4010	Entry.Value = FPOptionsOverride::getFromOpaqueInt(I: Record[Idx++]);
4011	Entry.Location = ReadSourceLocation(ModuleFile&: F, Raw: Record[Idx++]);
4012	Entry.PushLocation = ReadSourceLocation(ModuleFile&: F, Raw: Record[Idx++]);
4013	FpPragmaStrings.push_back(Elt: ReadString(Record, Idx));
4014	Entry.SlotLabel = FpPragmaStrings.back();
4015	FpPragmaStack.push_back(Elt: Entry);
4016	}
4017	break;
4018	}
4019
4020	case DECLS_TO_CHECK_FOR_DEFERRED_DIAGS:
4021	for (unsigned I = 0, N = Record.size(); I != N; ++I)
4022	DeclsToCheckForDeferredDiags.insert(X: getGlobalDeclID(F, LocalID: Record[I]));
4023	break;
4024	}
4025	}
4026	}
4027
4028	void ASTReader::ReadModuleOffsetMap(ModuleFile &F) const {
4029	assert(!F.ModuleOffsetMap.empty() && "no module offset map to read");
4030
4031	// Additional remapping information.
4032	const unsigned char *Data = (const unsigned char*)F.ModuleOffsetMap.data();
4033	const unsigned char *DataEnd = Data + F.ModuleOffsetMap.size();
4034	F.ModuleOffsetMap = StringRef();
4035
4036	// If we see this entry before SOURCE_LOCATION_OFFSETS, add placeholders.
4037	if (F.SLocRemap.find(K: 0) == F.SLocRemap.end()) {
4038	F.SLocRemap.insert(Val: std::make_pair(x: 0U, y: 0));
4039	F.SLocRemap.insert(Val: std::make_pair(x: 2U, y: 1));
4040	}
4041
4042	// Continuous range maps we may be updating in our module.
4043	using SLocRemapBuilder =
4044	ContinuousRangeMap<SourceLocation::UIntTy, SourceLocation::IntTy,
4045	2>::Builder;
4046	using RemapBuilder = ContinuousRangeMap<uint32_t, int, 2>::Builder;
4047	SLocRemapBuilder SLocRemap(F.SLocRemap);
4048	RemapBuilder IdentifierRemap(F.IdentifierRemap);
4049	RemapBuilder MacroRemap(F.MacroRemap);
4050	RemapBuilder PreprocessedEntityRemap(F.PreprocessedEntityRemap);
4051	RemapBuilder SubmoduleRemap(F.SubmoduleRemap);
4052	RemapBuilder SelectorRemap(F.SelectorRemap);
4053	RemapBuilder DeclRemap(F.DeclRemap);
4054	RemapBuilder TypeRemap(F.TypeRemap);
4055
4056	while (Data < DataEnd) {
4057	// FIXME: Looking up dependency modules by filename is horrible. Let's
4058	// start fixing this with prebuilt, explicit and implicit modules and see
4059	// how it goes...
4060	using namespace llvm::support;
4061	ModuleKind Kind = static_cast<ModuleKind>(
4062	endian::readNext<uint8_t, llvm::endianness::little, unaligned>(memory&: Data));
4063	uint16_t Len =
4064	endian::readNext<uint16_t, llvm::endianness::little, unaligned>(memory&: Data);
4065	StringRef Name = StringRef((const char*)Data, Len);
4066	Data += Len;
4067	ModuleFile *OM = (Kind == MK_PrebuiltModule || Kind == MK_ExplicitModule ||
4068	Kind == MK_ImplicitModule
4069	? ModuleMgr.lookupByModuleName(ModName: Name)
4070	: ModuleMgr.lookupByFileName(FileName: Name));
4071	if (!OM) {
4072	std::string Msg =
4073	"SourceLocation remap refers to unknown module, cannot find ";
4074	Msg.append(str: std::string(Name));
4075	Error(Msg);
4076	return;
4077	}
4078
4079	SourceLocation::UIntTy SLocOffset =
4080	endian::readNext<uint32_t, llvm::endianness::little, unaligned>(memory&: Data);
4081	uint32_t IdentifierIDOffset =
4082	endian::readNext<uint32_t, llvm::endianness::little, unaligned>(memory&: Data);
4083	uint32_t MacroIDOffset =
4084	endian::readNext<uint32_t, llvm::endianness::little, unaligned>(memory&: Data);
4085	uint32_t PreprocessedEntityIDOffset =
4086	endian::readNext<uint32_t, llvm::endianness::little, unaligned>(memory&: Data);
4087	uint32_t SubmoduleIDOffset =
4088	endian::readNext<uint32_t, llvm::endianness::little, unaligned>(memory&: Data);
4089	uint32_t SelectorIDOffset =
4090	endian::readNext<uint32_t, llvm::endianness::little, unaligned>(memory&: Data);
4091	uint32_t DeclIDOffset =
4092	endian::readNext<uint32_t, llvm::endianness::little, unaligned>(memory&: Data);
4093	uint32_t TypeIndexOffset =
4094	endian::readNext<uint32_t, llvm::endianness::little, unaligned>(memory&: Data);
4095
4096	auto mapOffset = [&](uint32_t Offset, uint32_t BaseOffset,
4097	RemapBuilder &Remap) {
4098	constexpr uint32_t None = std::numeric_limits<uint32_t>::max();
4099	if (Offset != None)
4100	Remap.insert(Val: std::make_pair(x&: Offset,
4101	y: static_cast<int>(BaseOffset - Offset)));
4102	};
4103
4104	constexpr SourceLocation::UIntTy SLocNone =
4105	std::numeric_limits<SourceLocation::UIntTy>::max();
4106	if (SLocOffset != SLocNone)
4107	SLocRemap.insert(Val: std::make_pair(
4108	x&: SLocOffset, y: static_cast<SourceLocation::IntTy>(
4109	OM->SLocEntryBaseOffset - SLocOffset)));
4110
4111	mapOffset(IdentifierIDOffset, OM->BaseIdentifierID, IdentifierRemap);
4112	mapOffset(MacroIDOffset, OM->BaseMacroID, MacroRemap);
4113	mapOffset(PreprocessedEntityIDOffset, OM->BasePreprocessedEntityID,
4114	PreprocessedEntityRemap);
4115	mapOffset(SubmoduleIDOffset, OM->BaseSubmoduleID, SubmoduleRemap);
4116	mapOffset(SelectorIDOffset, OM->BaseSelectorID, SelectorRemap);
4117	mapOffset(DeclIDOffset, OM->BaseDeclID, DeclRemap);
4118	mapOffset(TypeIndexOffset, OM->BaseTypeIndex, TypeRemap);
4119
4120	// Global -> local mappings.
4121	F.GlobalToLocalDeclIDs[OM] = DeclIDOffset;
4122	}
4123	}
4124
4125	ASTReader::ASTReadResult
4126	ASTReader::ReadModuleMapFileBlock(RecordData &Record, ModuleFile &F,
4127	const ModuleFile *ImportedBy,
4128	unsigned ClientLoadCapabilities) {
4129	unsigned Idx = 0;
4130	F.ModuleMapPath = ReadPath(F, Record, Idx);
4131
4132	// Try to resolve ModuleName in the current header search context and
4133	// verify that it is found in the same module map file as we saved. If the
4134	// top-level AST file is a main file, skip this check because there is no
4135	// usable header search context.
4136	assert(!F.ModuleName.empty() &&
4137	"MODULE_NAME should come before MODULE_MAP_FILE");
4138	if (PP.getPreprocessorOpts().ModulesCheckRelocated &&
4139	F.Kind == MK_ImplicitModule && ModuleMgr.begin()->Kind != MK_MainFile) {
4140	// An implicitly-loaded module file should have its module listed in some
4141	// module map file that we've already loaded.
4142	Module *M =
4143	PP.getHeaderSearchInfo().lookupModule(ModuleName: F.ModuleName, ImportLoc: F.ImportLoc);
4144	auto &Map = PP.getHeaderSearchInfo().getModuleMap();
4145	OptionalFileEntryRef ModMap =
4146	M ? Map.getModuleMapFileForUniquing(M) : std::nullopt;
4147	// Don't emit module relocation error if we have -fno-validate-pch
4148	if (!bool(PP.getPreprocessorOpts().DisablePCHOrModuleValidation &
4149	DisableValidationForModuleKind::Module) &&
4150	!ModMap) {
4151	if (!canRecoverFromOutOfDate(ModuleFileName: F.FileName, ClientLoadCapabilities)) {
4152	if (auto ASTFE = M ? M->getASTFile() : std::nullopt) {
4153	// This module was defined by an imported (explicit) module.
4154	Diag(diag::err_module_file_conflict) << F.ModuleName << F.FileName
4155	<< ASTFE->getName();
4156	} else {
4157	// This module was built with a different module map.
4158	Diag(diag::err_imported_module_not_found)
4159	<< F.ModuleName << F.FileName
4160	<< (ImportedBy ? ImportedBy->FileName : "") << F.ModuleMapPath
4161	<< !ImportedBy;
4162	// In case it was imported by a PCH, there's a chance the user is
4163	// just missing to include the search path to the directory containing
4164	// the modulemap.
4165	if (ImportedBy && ImportedBy->Kind == MK_PCH)
4166	Diag(diag::note_imported_by_pch_module_not_found)
4167	<< llvm::sys::path::parent_path(F.ModuleMapPath);
4168	}
4169	}
4170	return OutOfDate;
4171	}
4172
4173	assert(M && M->Name == F.ModuleName && "found module with different name");
4174
4175	// Check the primary module map file.
4176	auto StoredModMap = FileMgr.getFile(Filename: F.ModuleMapPath);
4177	if (!StoredModMap || *StoredModMap != ModMap) {
4178	assert(ModMap && "found module is missing module map file");
4179	assert((ImportedBy || F.Kind == MK_ImplicitModule) &&
4180	"top-level import should be verified");
4181	bool NotImported = F.Kind == MK_ImplicitModule && !ImportedBy;
4182	if (!canRecoverFromOutOfDate(F.FileName, ClientLoadCapabilities))
4183	Diag(diag::err_imported_module_modmap_changed)
4184	<< F.ModuleName << (NotImported ? F.FileName : ImportedBy->FileName)
4185	<< ModMap->getName() << F.ModuleMapPath << NotImported;
4186	return OutOfDate;
4187	}
4188
4189	ModuleMap::AdditionalModMapsSet AdditionalStoredMaps;
4190	for (unsigned I = 0, N = Record[Idx++]; I < N; ++I) {
4191	// FIXME: we should use input files rather than storing names.
4192	std::string Filename = ReadPath(F, Record, Idx);
4193	auto SF = FileMgr.getOptionalFileRef(Filename, OpenFile: false, CacheFailure: false);
4194	if (!SF) {
4195	if (!canRecoverFromOutOfDate(ModuleFileName: F.FileName, ClientLoadCapabilities))
4196	Error(Msg: "could not find file '" + Filename +"' referenced by AST file");
4197	return OutOfDate;
4198	}
4199	AdditionalStoredMaps.insert(V: *SF);
4200	}
4201
4202	// Check any additional module map files (e.g. module.private.modulemap)
4203	// that are not in the pcm.
4204	if (auto *AdditionalModuleMaps = Map.getAdditionalModuleMapFiles(M)) {
4205	for (FileEntryRef ModMap : *AdditionalModuleMaps) {
4206	// Remove files that match
4207	// Note: SmallPtrSet::erase is really remove
4208	if (!AdditionalStoredMaps.erase(V: ModMap)) {
4209	if (!canRecoverFromOutOfDate(F.FileName, ClientLoadCapabilities))
4210	Diag(diag::err_module_different_modmap)
4211	<< F.ModuleName << /*new*/0 << ModMap.getName();
4212	return OutOfDate;
4213	}
4214	}
4215	}
4216
4217	// Check any additional module map files that are in the pcm, but not
4218	// found in header search. Cases that match are already removed.
4219	for (FileEntryRef ModMap : AdditionalStoredMaps) {
4220	if (!canRecoverFromOutOfDate(F.FileName, ClientLoadCapabilities))
4221	Diag(diag::err_module_different_modmap)
4222	<< F.ModuleName << /*not new*/1 << ModMap.getName();
4223	return OutOfDate;
4224	}
4225	}
4226
4227	if (Listener)
4228	Listener->ReadModuleMapFile(ModuleMapPath: F.ModuleMapPath);
4229	return Success;
4230	}
4231
4232	/// Move the given method to the back of the global list of methods.
4233	static void moveMethodToBackOfGlobalList(Sema &S, ObjCMethodDecl *Method) {
4234	// Find the entry for this selector in the method pool.
4235	Sema::GlobalMethodPool::iterator Known
4236	= S.MethodPool.find(Sel: Method->getSelector());
4237	if (Known == S.MethodPool.end())
4238	return;
4239
4240	// Retrieve the appropriate method list.
4241	ObjCMethodList &Start = Method->isInstanceMethod()? Known->second.first
4242	: Known->second.second;
4243	bool Found = false;
4244	for (ObjCMethodList *List = &Start; List; List = List->getNext()) {
4245	if (!Found) {
4246	if (List->getMethod() == Method) {
4247	Found = true;
4248	} else {
4249	// Keep searching.
4250	continue;
4251	}
4252	}
4253
4254	if (List->getNext())
4255	List->setMethod(List->getNext()->getMethod());
4256	else
4257	List->setMethod(Method);
4258	}
4259	}
4260
4261	void ASTReader::makeNamesVisible(const HiddenNames &Names, Module *Owner) {
4262	assert(Owner->NameVisibility != Module::Hidden && "nothing to make visible?");
4263	for (Decl *D : Names) {
4264	bool wasHidden = !D->isUnconditionallyVisible();
4265	D->setVisibleDespiteOwningModule();
4266
4267	if (wasHidden && SemaObj) {
4268	if (ObjCMethodDecl *Method = dyn_cast<ObjCMethodDecl>(Val: D)) {
4269	moveMethodToBackOfGlobalList(S&: *SemaObj, Method);
4270	}
4271	}
4272	}
4273	}
4274
4275	void ASTReader::makeModuleVisible(Module *Mod,
4276	Module::NameVisibilityKind NameVisibility,
4277	SourceLocation ImportLoc) {
4278	llvm::SmallPtrSet<Module *, 4> Visited;
4279	SmallVector<Module *, 4> Stack;
4280	Stack.push_back(Elt: Mod);
4281	while (!Stack.empty()) {
4282	Mod = Stack.pop_back_val();
4283
4284	if (NameVisibility <= Mod->NameVisibility) {
4285	// This module already has this level of visibility (or greater), so
4286	// there is nothing more to do.
4287	continue;
4288	}
4289
4290	if (Mod->isUnimportable()) {
4291	// Modules that aren't importable cannot be made visible.
4292	continue;
4293	}
4294
4295	// Update the module's name visibility.
4296	Mod->NameVisibility = NameVisibility;
4297
4298	// If we've already deserialized any names from this module,
4299	// mark them as visible.
4300	HiddenNamesMapType::iterator Hidden = HiddenNamesMap.find(Val: Mod);
4301	if (Hidden != HiddenNamesMap.end()) {
4302	auto HiddenNames = std::move(*Hidden);
4303	HiddenNamesMap.erase(I: Hidden);
4304	makeNamesVisible(Names: HiddenNames.second, Owner: HiddenNames.first);
4305	assert(!HiddenNamesMap.contains(Mod) &&
4306	"making names visible added hidden names");
4307	}
4308
4309	// Push any exported modules onto the stack to be marked as visible.
4310	SmallVector<Module *, 16> Exports;
4311	Mod->getExportedModules(Exported&: Exports);
4312	for (SmallVectorImpl<Module *>::iterator
4313	I = Exports.begin(), E = Exports.end(); I != E; ++I) {
4314	Module *Exported = *I;
4315	if (Visited.insert(Ptr: Exported).second)
4316	Stack.push_back(Elt: Exported);
4317	}
4318	}
4319	}
4320
4321	/// We've merged the definition \p MergedDef into the existing definition
4322	/// \p Def. Ensure that \p Def is made visible whenever \p MergedDef is made
4323	/// visible.
4324	void ASTReader::mergeDefinitionVisibility(NamedDecl *Def,
4325	NamedDecl *MergedDef) {
4326	if (!Def->isUnconditionallyVisible()) {
4327	// If MergedDef is visible or becomes visible, make the definition visible.
4328	if (MergedDef->isUnconditionallyVisible())
4329	Def->setVisibleDespiteOwningModule();
4330	else {
4331	getContext().mergeDefinitionIntoModule(
4332	ND: Def, M: MergedDef->getImportedOwningModule(),
4333	/*NotifyListeners*/ false);
4334	PendingMergedDefinitionsToDeduplicate.insert(X: Def);
4335	}
4336	}
4337	}
4338
4339	bool ASTReader::loadGlobalIndex() {
4340	if (GlobalIndex)
4341	return false;
4342
4343	if (TriedLoadingGlobalIndex || !UseGlobalIndex ||
4344	!PP.getLangOpts().Modules)
4345	return true;
4346
4347	// Try to load the global index.
4348	TriedLoadingGlobalIndex = true;
4349	StringRef ModuleCachePath
4350	= getPreprocessor().getHeaderSearchInfo().getModuleCachePath();
4351	std::pair<GlobalModuleIndex *, llvm::Error> Result =
4352	GlobalModuleIndex::readIndex(Path: ModuleCachePath);
4353	if (llvm::Error Err = std::move(Result.second)) {
4354	assert(!Result.first);
4355	consumeError(Err: std::move(Err)); // FIXME this drops errors on the floor.
4356	return true;
4357	}
4358
4359	GlobalIndex.reset(p: Result.first);
4360	ModuleMgr.setGlobalIndex(GlobalIndex.get());
4361	return false;
4362	}
4363
4364	bool ASTReader::isGlobalIndexUnavailable() const {
4365	return PP.getLangOpts().Modules && UseGlobalIndex &&
4366	!hasGlobalIndex() && TriedLoadingGlobalIndex;
4367	}
4368
4369	static void updateModuleTimestamp(ModuleFile &MF) {
4370	// Overwrite the timestamp file contents so that file's mtime changes.
4371	std::string TimestampFilename = MF.getTimestampFilename();
4372	std::error_code EC;
4373	llvm::raw_fd_ostream OS(TimestampFilename, EC,
4374	llvm::sys::fs::OF_TextWithCRLF);
4375	if (EC)
4376	return;
4377	OS << "Timestamp file\n";
4378	OS.close();
4379	OS.clear_error(); // Avoid triggering a fatal error.
4380	}
4381
4382	/// Given a cursor at the start of an AST file, scan ahead and drop the
4383	/// cursor into the start of the given block ID, returning false on success and
4384	/// true on failure.
4385	static bool SkipCursorToBlock(BitstreamCursor &Cursor, unsigned BlockID) {
4386	while (true) {
4387	Expected<llvm::BitstreamEntry> MaybeEntry = Cursor.advance();
4388	if (!MaybeEntry) {
4389	// FIXME this drops errors on the floor.
4390	consumeError(Err: MaybeEntry.takeError());
4391	return true;
4392	}
4393	llvm::BitstreamEntry Entry = MaybeEntry.get();
4394
4395	switch (Entry.Kind) {
4396	case llvm::BitstreamEntry::Error:
4397	case llvm::BitstreamEntry::EndBlock:
4398	return true;
4399
4400	case llvm::BitstreamEntry::Record:
4401	// Ignore top-level records.
4402	if (Expected<unsigned> Skipped = Cursor.skipRecord(AbbrevID: Entry.ID))
4403	break;
4404	else {
4405	// FIXME this drops errors on the floor.
4406	consumeError(Err: Skipped.takeError());
4407	return true;
4408	}
4409
4410	case llvm::BitstreamEntry::SubBlock:
4411	if (Entry.ID == BlockID) {
4412	if (llvm::Error Err = Cursor.EnterSubBlock(BlockID)) {
4413	// FIXME this drops the error on the floor.
4414	consumeError(Err: std::move(Err));
4415	return true;
4416	}
4417	// Found it!
4418	return false;
4419	}
4420
4421	if (llvm::Error Err = Cursor.SkipBlock()) {
4422	// FIXME this drops the error on the floor.
4423	consumeError(Err: std::move(Err));
4424	return true;
4425	}
4426	}
4427	}
4428	}
4429
4430	ASTReader::ASTReadResult ASTReader::ReadAST(StringRef FileName, ModuleKind Type,
4431	SourceLocation ImportLoc,
4432	unsigned ClientLoadCapabilities,
4433	ModuleFile **NewLoadedModuleFile) {
4434	llvm::TimeTraceScope scope("ReadAST", FileName);
4435
4436	llvm::SaveAndRestore SetCurImportLocRAII(CurrentImportLoc, ImportLoc);
4437	llvm::SaveAndRestore<std::optional<ModuleKind>> SetCurModuleKindRAII(
4438	CurrentDeserializingModuleKind, Type);
4439
4440	// Defer any pending actions until we get to the end of reading the AST file.
4441	Deserializing AnASTFile(this);
4442
4443	// Bump the generation number.
4444	unsigned PreviousGeneration = 0;
4445	if (ContextObj)
4446	PreviousGeneration = incrementGeneration(C&: *ContextObj);
4447
4448	unsigned NumModules = ModuleMgr.size();
4449	SmallVector<ImportedModule, 4> Loaded;
4450	if (ASTReadResult ReadResult =
4451	ReadASTCore(FileName, Type, ImportLoc,
4452	/*ImportedBy=*/nullptr, Loaded, ExpectedSize: 0, ExpectedModTime: 0, ExpectedSignature: ASTFileSignature(),
4453	ClientLoadCapabilities)) {
4454	ModuleMgr.removeModules(First: ModuleMgr.begin() + NumModules);
4455
4456	// If we find that any modules are unusable, the global index is going
4457	// to be out-of-date. Just remove it.
4458	GlobalIndex.reset();
4459	ModuleMgr.setGlobalIndex(nullptr);
4460	return ReadResult;
4461	}
4462
4463	if (NewLoadedModuleFile && !Loaded.empty())
4464	*NewLoadedModuleFile = Loaded.back().Mod;
4465
4466	// Here comes stuff that we only do once the entire chain is loaded. Do *not*
4467	// remove modules from this point. Various fields are updated during reading
4468	// the AST block and removing the modules would result in dangling pointers.
4469	// They are generally only incidentally dereferenced, ie. a binary search
4470	// runs over `GlobalSLocEntryMap`, which could cause an invalid module to
4471	// be dereferenced but it wouldn't actually be used.
4472
4473	// Load the AST blocks of all of the modules that we loaded. We can still
4474	// hit errors parsing the ASTs at this point.
4475	for (ImportedModule &M : Loaded) {
4476	ModuleFile &F = *M.Mod;
4477	llvm::TimeTraceScope Scope2("Read Loaded AST", F.ModuleName);
4478
4479	// Read the AST block.
4480	if (llvm::Error Err = ReadASTBlock(F, ClientLoadCapabilities)) {
4481	Error(Err: std::move(Err));
4482	return Failure;
4483	}
4484
4485	// The AST block should always have a definition for the main module.
4486	if (F.isModule() && !F.DidReadTopLevelSubmodule) {
4487	Error(diag::err_module_file_missing_top_level_submodule, F.FileName);
4488	return Failure;
4489	}
4490
4491	// Read the extension blocks.
4492	while (!SkipCursorToBlock(Cursor&: F.Stream, BlockID: EXTENSION_BLOCK_ID)) {
4493	if (llvm::Error Err = ReadExtensionBlock(F)) {
4494	Error(Err: std::move(Err));
4495	return Failure;
4496	}
4497	}
4498
4499	// Once read, set the ModuleFile bit base offset and update the size in
4500	// bits of all files we've seen.
4501	F.GlobalBitOffset = TotalModulesSizeInBits;
4502	TotalModulesSizeInBits += F.SizeInBits;
4503	GlobalBitOffsetsMap.insert(Val: std::make_pair(x&: F.GlobalBitOffset, y: &F));
4504	}
4505
4506	// Preload source locations and interesting indentifiers.
4507	for (ImportedModule &M : Loaded) {
4508	ModuleFile &F = *M.Mod;
4509
4510	// Map the original source file ID into the ID space of the current
4511	// compilation.
4512	if (F.OriginalSourceFileID.isValid())
4513	F.OriginalSourceFileID = TranslateFileID(F, FID: F.OriginalSourceFileID);
4514
4515	for (auto Offset : F.PreloadIdentifierOffsets) {
4516	const unsigned char *Data = F.IdentifierTableData + Offset;
4517
4518	ASTIdentifierLookupTrait Trait(*this, F);
4519	auto KeyDataLen = Trait.ReadKeyDataLength(d&: Data);
4520	auto Key = Trait.ReadKey(d: Data, n: KeyDataLen.first);
4521
4522	IdentifierInfo *II;
4523	if (!PP.getLangOpts().CPlusPlus) {
4524	// Identifiers present in both the module file and the importing
4525	// instance are marked out-of-date so that they can be deserialized
4526	// on next use via ASTReader::updateOutOfDateIdentifier().
4527	// Identifiers present in the module file but not in the importing
4528	// instance are ignored for now, preventing growth of the identifier
4529	// table. They will be deserialized on first use via ASTReader::get().
4530	auto It = PP.getIdentifierTable().find(Key);
4531	if (It == PP.getIdentifierTable().end())
4532	continue;
4533	II = It->second;
4534	} else {
4535	// With C++ modules, not many identifiers are considered interesting.
4536	// All identifiers in the module file can be placed into the identifier
4537	// table of the importing instance and marked as out-of-date. This makes
4538	// ASTReader::get() a no-op, and deserialization will take place on
4539	// first/next use via ASTReader::updateOutOfDateIdentifier().
4540	II = &PP.getIdentifierTable().getOwn(Name: Key);
4541	}
4542
4543	II->setOutOfDate(true);
4544
4545	// Mark this identifier as being from an AST file so that we can track
4546	// whether we need to serialize it.
4547	markIdentifierFromAST(Reader&: *this, II&: *II);
4548
4549	// Associate the ID with the identifier so that the writer can reuse it.
4550	auto ID = Trait.ReadIdentifierID(d: Data + KeyDataLen.first);
4551	SetIdentifierInfo(ID, II);
4552	}
4553	}
4554
4555	// Builtins and library builtins have already been initialized. Mark all
4556	// identifiers as out-of-date, so that they are deserialized on first use.
4557	if (Type == MK_PCH || Type == MK_Preamble || Type == MK_MainFile)
4558	for (auto &Id : PP.getIdentifierTable())
4559	Id.second->setOutOfDate(true);
4560
4561	// Mark selectors as out of date.
4562	for (const auto &Sel : SelectorGeneration)
4563	SelectorOutOfDate[Sel.first] = true;
4564
4565	// Setup the import locations and notify the module manager that we've
4566	// committed to these module files.
4567	for (ImportedModule &M : Loaded) {
4568	ModuleFile &F = *M.Mod;
4569
4570	ModuleMgr.moduleFileAccepted(MF: &F);
4571
4572	// Set the import location.
4573	F.DirectImportLoc = ImportLoc;
4574	// FIXME: We assume that locations from PCH / preamble do not need
4575	// any translation.
4576	if (!M.ImportedBy)
4577	F.ImportLoc = M.ImportLoc;
4578	else
4579	F.ImportLoc = TranslateSourceLocation(ModuleFile&: *M.ImportedBy, Loc: M.ImportLoc);
4580	}
4581
4582	// Resolve any unresolved module exports.
4583	for (unsigned I = 0, N = UnresolvedModuleRefs.size(); I != N; ++I) {
4584	UnresolvedModuleRef &Unresolved = UnresolvedModuleRefs[I];
4585	SubmoduleID GlobalID = getGlobalSubmoduleID(M&: *Unresolved.File,LocalID: Unresolved.ID);
4586	Module *ResolvedMod = getSubmodule(GlobalID);
4587
4588	switch (Unresolved.Kind) {
4589	case UnresolvedModuleRef::Conflict:
4590	if (ResolvedMod) {
4591	Module::Conflict Conflict;
4592	Conflict.Other = ResolvedMod;
4593	Conflict.Message = Unresolved.String.str();
4594	Unresolved.Mod->Conflicts.push_back(x: Conflict);
4595	}
4596	continue;
4597
4598	case UnresolvedModuleRef::Import:
4599	if (ResolvedMod)
4600	Unresolved.Mod->Imports.insert(X: ResolvedMod);
4601	continue;
4602
4603	case UnresolvedModuleRef::Affecting:
4604	if (ResolvedMod)
4605	Unresolved.Mod->AffectingClangModules.insert(X: ResolvedMod);
4606	continue;
4607
4608	case UnresolvedModuleRef::Export:
4609	if (ResolvedMod || Unresolved.IsWildcard)
4610	Unresolved.Mod->Exports.push_back(
4611	Elt: Module::ExportDecl(ResolvedMod, Unresolved.IsWildcard));
4612	continue;
4613	}
4614	}
4615	UnresolvedModuleRefs.clear();
4616
4617	// FIXME: How do we load the 'use'd modules? They may not be submodules.
4618	// Might be unnecessary as use declarations are only used to build the
4619	// module itself.
4620
4621	if (ContextObj)
4622	InitializeContext();
4623
4624	if (SemaObj)
4625	UpdateSema();
4626
4627	if (DeserializationListener)
4628	DeserializationListener->ReaderInitialized(Reader: this);
4629
4630	ModuleFile &PrimaryModule = ModuleMgr.getPrimaryModule();
4631	if (PrimaryModule.OriginalSourceFileID.isValid()) {
4632	// If this AST file is a precompiled preamble, then set the
4633	// preamble file ID of the source manager to the file source file
4634	// from which the preamble was built.
4635	if (Type == MK_Preamble) {
4636	SourceMgr.setPreambleFileID(PrimaryModule.OriginalSourceFileID);
4637	} else if (Type == MK_MainFile) {
4638	SourceMgr.setMainFileID(PrimaryModule.OriginalSourceFileID);
4639	}
4640	}
4641
4642	// For any Objective-C class definitions we have already loaded, make sure
4643	// that we load any additional categories.
4644	if (ContextObj) {
4645	for (unsigned I = 0, N = ObjCClassesLoaded.size(); I != N; ++I) {
4646	loadObjCCategories(ID: ObjCClassesLoaded[I]->getGlobalID(),
4647	D: ObjCClassesLoaded[I],
4648	PreviousGeneration);
4649	}
4650	}
4651
4652	HeaderSearchOptions &HSOpts = PP.getHeaderSearchInfo().getHeaderSearchOpts();
4653	if (HSOpts.ModulesValidateOncePerBuildSession) {
4654	// Now we are certain that the module and all modules it depends on are
4655	// up-to-date. For implicitly-built module files, ensure the corresponding
4656	// timestamp files are up-to-date in this build session.
4657	for (unsigned I = 0, N = Loaded.size(); I != N; ++I) {
4658	ImportedModule &M = Loaded[I];
4659	if (M.Mod->Kind == MK_ImplicitModule &&
4660	M.Mod->InputFilesValidationTimestamp < HSOpts.BuildSessionTimestamp)
4661	updateModuleTimestamp(MF&: *M.Mod);
4662	}
4663	}
4664
4665	return Success;
4666	}
4667
4668	static ASTFileSignature readASTFileSignature(StringRef PCH);
4669
4670	/// Whether \p Stream doesn't start with the AST/PCH file magic number 'CPCH'.
4671	static llvm::Error doesntStartWithASTFileMagic(BitstreamCursor &Stream) {
4672	// FIXME checking magic headers is done in other places such as
4673	// SerializedDiagnosticReader and GlobalModuleIndex, but error handling isn't
4674	// always done the same. Unify it all with a helper.
4675	if (!Stream.canSkipToPos(pos: 4))
4676	return llvm::createStringError(EC: std::errc::illegal_byte_sequence,
4677	Fmt: "file too small to contain AST file magic");
4678	for (unsigned C : {'C', 'P', 'C', 'H'})
4679	if (Expected<llvm::SimpleBitstreamCursor::word_t> Res = Stream.Read(NumBits: 8)) {
4680	if (Res.get() != C)
4681	return llvm::createStringError(
4682	EC: std::errc::illegal_byte_sequence,
4683	Fmt: "file doesn't start with AST file magic");
4684	} else
4685	return Res.takeError();
4686	return llvm::Error::success();
4687	}
4688
4689	static unsigned moduleKindForDiagnostic(ModuleKind Kind) {
4690	switch (Kind) {
4691	case MK_PCH:
4692	return 0; // PCH
4693	case MK_ImplicitModule:
4694	case MK_ExplicitModule:
4695	case MK_PrebuiltModule:
4696	return 1; // module
4697	case MK_MainFile:
4698	case MK_Preamble:
4699	return 2; // main source file
4700	}
4701	llvm_unreachable("unknown module kind");
4702	}
4703
4704	ASTReader::ASTReadResult
4705	ASTReader::ReadASTCore(StringRef FileName,
4706	ModuleKind Type,
4707	SourceLocation ImportLoc,
4708	ModuleFile *ImportedBy,
4709	SmallVectorImpl<ImportedModule> &Loaded,
4710	off_t ExpectedSize, time_t ExpectedModTime,
4711	ASTFileSignature ExpectedSignature,
4712	unsigned ClientLoadCapabilities) {
4713	ModuleFile *M;
4714	std::string ErrorStr;
4715	ModuleManager::AddModuleResult AddResult
4716	= ModuleMgr.addModule(FileName, Type, ImportLoc, ImportedBy,
4717	Generation: getGeneration(), ExpectedSize, ExpectedModTime,
4718	ExpectedSignature, ReadSignature: readASTFileSignature,
4719	Module&: M, ErrorStr);
4720
4721	switch (AddResult) {
4722	case ModuleManager::AlreadyLoaded:
4723	Diag(diag::remark_module_import)
4724	<< M->ModuleName << M->FileName << (ImportedBy ? true : false)
4725	<< (ImportedBy ? StringRef(ImportedBy->ModuleName) : StringRef());
4726	return Success;
4727
4728	case ModuleManager::NewlyLoaded:
4729	// Load module file below.
4730	break;
4731
4732	case ModuleManager::Missing:
4733	// The module file was missing; if the client can handle that, return
4734	// it.
4735	if (ClientLoadCapabilities & ARR_Missing)
4736	return Missing;
4737
4738	// Otherwise, return an error.
4739	Diag(diag::err_ast_file_not_found)
4740	<< moduleKindForDiagnostic(Type) << FileName << !ErrorStr.empty()
4741	<< ErrorStr;
4742	return Failure;
4743
4744	case ModuleManager::OutOfDate:
4745	// We couldn't load the module file because it is out-of-date. If the
4746	// client can handle out-of-date, return it.
4747	if (ClientLoadCapabilities & ARR_OutOfDate)
4748	return OutOfDate;
4749
4750	// Otherwise, return an error.
4751	Diag(diag::err_ast_file_out_of_date)
4752	<< moduleKindForDiagnostic(Type) << FileName << !ErrorStr.empty()
4753	<< ErrorStr;
4754	return Failure;
4755	}
4756
4757	assert(M && "Missing module file");
4758
4759	bool ShouldFinalizePCM = false;
4760	auto FinalizeOrDropPCM = llvm::make_scope_exit(F: [&]() {
4761	auto &MC = getModuleManager().getModuleCache();
4762	if (ShouldFinalizePCM)
4763	MC.finalizePCM(Filename: FileName);
4764	else
4765	MC.tryToDropPCM(Filename: FileName);
4766	});
4767	ModuleFile &F = *M;
4768	BitstreamCursor &Stream = F.Stream;
4769	Stream = BitstreamCursor(PCHContainerRdr.ExtractPCH(Buffer: *F.Buffer));
4770	F.SizeInBits = F.Buffer->getBufferSize() * 8;
4771
4772	// Sniff for the signature.
4773	if (llvm::Error Err = doesntStartWithASTFileMagic(Stream)) {
4774	Diag(diag::err_ast_file_invalid)
4775	<< moduleKindForDiagnostic(Type) << FileName << std::move(Err);
4776	return Failure;
4777	}
4778
4779	// This is used for compatibility with older PCH formats.
4780	bool HaveReadControlBlock = false;
4781	while (true) {
4782	Expected<llvm::BitstreamEntry> MaybeEntry = Stream.advance();
4783	if (!MaybeEntry) {
4784	Error(Err: MaybeEntry.takeError());
4785	return Failure;
4786	}
4787	llvm::BitstreamEntry Entry = MaybeEntry.get();
4788
4789	switch (Entry.Kind) {
4790	case llvm::BitstreamEntry::Error:
4791	case llvm::BitstreamEntry::Record:
4792	case llvm::BitstreamEntry::EndBlock:
4793	Error(Msg: "invalid record at top-level of AST file");
4794	return Failure;
4795
4796	case llvm::BitstreamEntry::SubBlock:
4797	break;
4798	}
4799
4800	switch (Entry.ID) {
4801	case CONTROL_BLOCK_ID:
4802	HaveReadControlBlock = true;
4803	switch (ReadControlBlock(F, Loaded, ImportedBy, ClientLoadCapabilities)) {
4804	case Success:
4805	// Check that we didn't try to load a non-module AST file as a module.
4806	//
4807	// FIXME: Should we also perform the converse check? Loading a module as
4808	// a PCH file sort of works, but it's a bit wonky.
4809	if ((Type == MK_ImplicitModule || Type == MK_ExplicitModule ||
4810	Type == MK_PrebuiltModule) &&
4811	F.ModuleName.empty()) {
4812	auto Result = (Type == MK_ImplicitModule) ? OutOfDate : Failure;
4813	if (Result != OutOfDate ||
4814	(ClientLoadCapabilities & ARR_OutOfDate) == 0)
4815	Diag(diag::err_module_file_not_module) << FileName;
4816	return Result;
4817	}
4818	break;
4819
4820	case Failure: return Failure;
4821	case Missing: return Missing;
4822	case OutOfDate: return OutOfDate;
4823	case VersionMismatch: return VersionMismatch;
4824	case ConfigurationMismatch: return ConfigurationMismatch;
4825	case HadErrors: return HadErrors;
4826	}
4827	break;
4828
4829	case AST_BLOCK_ID:
4830	if (!HaveReadControlBlock) {
4831	if ((ClientLoadCapabilities & ARR_VersionMismatch) == 0)
4832	Diag(diag::err_pch_version_too_old);
4833	return VersionMismatch;
4834	}
4835
4836	// Record that we've loaded this module.
4837	Loaded.push_back(Elt: ImportedModule(M, ImportedBy, ImportLoc));
4838	ShouldFinalizePCM = true;
4839	return Success;
4840
4841	default:
4842	if (llvm::Error Err = Stream.SkipBlock()) {
4843	Error(Err: std::move(Err));
4844	return Failure;
4845	}
4846	break;
4847	}
4848	}
4849
4850	llvm_unreachable("unexpected break; expected return");
4851	}
4852
4853	ASTReader::ASTReadResult
4854	ASTReader::readUnhashedControlBlock(ModuleFile &F, bool WasImportedBy,
4855	unsigned ClientLoadCapabilities) {
4856	const HeaderSearchOptions &HSOpts =
4857	PP.getHeaderSearchInfo().getHeaderSearchOpts();
4858	bool AllowCompatibleConfigurationMismatch =
4859	F.Kind == MK_ExplicitModule || F.Kind == MK_PrebuiltModule;
4860	bool DisableValidation = shouldDisableValidationForFile(M: F);
4861
4862	ASTReadResult Result = readUnhashedControlBlockImpl(
4863	F: &F, StreamData: F.Data, ClientLoadCapabilities, AllowCompatibleConfigurationMismatch,
4864	Listener: Listener.get(),
4865	ValidateDiagnosticOptions: WasImportedBy ? false : HSOpts.ModulesValidateDiagnosticOptions);
4866
4867	// If F was directly imported by another module, it's implicitly validated by
4868	// the importing module.
4869	if (DisableValidation || WasImportedBy ||
4870	(AllowConfigurationMismatch && Result == ConfigurationMismatch))
4871	return Success;
4872
4873	if (Result == Failure) {
4874	Error(Msg: "malformed block record in AST file");
4875	return Failure;
4876	}
4877
4878	if (Result == OutOfDate && F.Kind == MK_ImplicitModule) {
4879	// If this module has already been finalized in the ModuleCache, we're stuck
4880	// with it; we can only load a single version of each module.
4881	//
4882	// This can happen when a module is imported in two contexts: in one, as a
4883	// user module; in another, as a system module (due to an import from
4884	// another module marked with the [system] flag). It usually indicates a
4885	// bug in the module map: this module should also be marked with [system].
4886	//
4887	// If -Wno-system-headers (the default), and the first import is as a
4888	// system module, then validation will fail during the as-user import,
4889	// since -Werror flags won't have been validated. However, it's reasonable
4890	// to treat this consistently as a system module.
4891	//
4892	// If -Wsystem-headers, the PCM on disk was built with
4893	// -Wno-system-headers, and the first import is as a user module, then
4894	// validation will fail during the as-system import since the PCM on disk
4895	// doesn't guarantee that -Werror was respected. However, the -Werror
4896	// flags were checked during the initial as-user import.
4897	if (getModuleManager().getModuleCache().isPCMFinal(Filename: F.FileName)) {
4898	Diag(diag::warn_module_system_bit_conflict) << F.FileName;
4899	return Success;
4900	}
4901	}
4902
4903	return Result;
4904	}
4905
4906	ASTReader::ASTReadResult ASTReader::readUnhashedControlBlockImpl(
4907	ModuleFile *F, llvm::StringRef StreamData, unsigned ClientLoadCapabilities,
4908	bool AllowCompatibleConfigurationMismatch, ASTReaderListener *Listener,
4909	bool ValidateDiagnosticOptions) {
4910	// Initialize a stream.
4911	BitstreamCursor Stream(StreamData);
4912
4913	// Sniff for the signature.
4914	if (llvm::Error Err = doesntStartWithASTFileMagic(Stream)) {
4915	// FIXME this drops the error on the floor.
4916	consumeError(Err: std::move(Err));
4917	return Failure;
4918	}
4919
4920	// Scan for the UNHASHED_CONTROL_BLOCK_ID block.
4921	if (SkipCursorToBlock(Cursor&: Stream, BlockID: UNHASHED_CONTROL_BLOCK_ID))
4922	return Failure;
4923
4924	// Read all of the records in the options block.
4925	RecordData Record;
4926	ASTReadResult Result = Success;
4927	while (true) {
4928	Expected<llvm::BitstreamEntry> MaybeEntry = Stream.advance();
4929	if (!MaybeEntry) {
4930	// FIXME this drops the error on the floor.
4931	consumeError(Err: MaybeEntry.takeError());
4932	return Failure;
4933	}
4934	llvm::BitstreamEntry Entry = MaybeEntry.get();
4935
4936	switch (Entry.Kind) {
4937	case llvm::BitstreamEntry::Error:
4938	case llvm::BitstreamEntry::SubBlock:
4939	return Failure;
4940
4941	case llvm::BitstreamEntry::EndBlock:
4942	return Result;
4943
4944	case llvm::BitstreamEntry::Record:
4945	// The interesting case.
4946	break;
4947	}
4948
4949	// Read and process a record.
4950	Record.clear();
4951	StringRef Blob;
4952	Expected<unsigned> MaybeRecordType =
4953	Stream.readRecord(AbbrevID: Entry.ID, Vals&: Record, Blob: &Blob);
4954	if (!MaybeRecordType) {
4955	// FIXME this drops the error.
4956	return Failure;
4957	}
4958	switch ((UnhashedControlBlockRecordTypes)MaybeRecordType.get()) {
4959	case SIGNATURE:
4960	if (F) {
4961	F->Signature = ASTFileSignature::create(First: Blob.begin(), Last: Blob.end());
4962	assert(F->Signature != ASTFileSignature::createDummy() &&
4963	"Dummy AST file signature not backpatched in ASTWriter.");
4964	}
4965	break;
4966	case AST_BLOCK_HASH:
4967	if (F) {
4968	F->ASTBlockHash = ASTFileSignature::create(First: Blob.begin(), Last: Blob.end());
4969	assert(F->ASTBlockHash != ASTFileSignature::createDummy() &&
4970	"Dummy AST block hash not backpatched in ASTWriter.");
4971	}
4972	break;
4973	case DIAGNOSTIC_OPTIONS: {
4974	bool Complain = (ClientLoadCapabilities & ARR_OutOfDate) == 0;
4975	if (Listener && ValidateDiagnosticOptions &&
4976	!AllowCompatibleConfigurationMismatch &&
4977	ParseDiagnosticOptions(Record, Complain, Listener&: *Listener))
4978	Result = OutOfDate; // Don't return early. Read the signature.
4979	break;
4980	}
4981	case HEADER_SEARCH_PATHS: {
4982	bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch) == 0;
4983	if (Listener && !AllowCompatibleConfigurationMismatch &&
4984	ParseHeaderSearchPaths(Record, Complain, Listener&: *Listener))
4985	Result = ConfigurationMismatch;
4986	break;
4987	}
4988	case DIAG_PRAGMA_MAPPINGS:
4989	if (!F)
4990	break;
4991	if (F->PragmaDiagMappings.empty())
4992	F->PragmaDiagMappings.swap(RHS&: Record);
4993	else
4994	F->PragmaDiagMappings.insert(I: F->PragmaDiagMappings.end(),
4995	From: Record.begin(), To: Record.end());
4996	break;
4997	case HEADER_SEARCH_ENTRY_USAGE:
4998	if (F)
4999	F->SearchPathUsage = ReadBitVector(Record, Blob);
5000	break;
5001	case VFS_USAGE:
5002	if (F)
5003	F->VFSUsage = ReadBitVector(Record, Blob);
5004	break;
5005	}
5006	}
5007	}
5008
5009	/// Parse a record and blob containing module file extension metadata.
5010	static bool parseModuleFileExtensionMetadata(
5011	const SmallVectorImpl<uint64_t> &Record,
5012	StringRef Blob,
5013	ModuleFileExtensionMetadata &Metadata) {
5014	if (Record.size() < 4) return true;
5015
5016	Metadata.MajorVersion = Record[0];
5017	Metadata.MinorVersion = Record[1];
5018
5019	unsigned BlockNameLen = Record[2];
5020	unsigned UserInfoLen = Record[3];
5021
5022	if (BlockNameLen + UserInfoLen > Blob.size()) return true;
5023
5024	Metadata.BlockName = std::string(Blob.data(), Blob.data() + BlockNameLen);
5025	Metadata.UserInfo = std::string(Blob.data() + BlockNameLen,
5026	Blob.data() + BlockNameLen + UserInfoLen);
5027	return false;
5028	}
5029
5030	llvm::Error ASTReader::ReadExtensionBlock(ModuleFile &F) {
5031	BitstreamCursor &Stream = F.Stream;
5032
5033	RecordData Record;
5034	while (true) {
5035	Expected<llvm::BitstreamEntry> MaybeEntry = Stream.advance();
5036	if (!MaybeEntry)
5037	return MaybeEntry.takeError();
5038	llvm::BitstreamEntry Entry = MaybeEntry.get();
5039
5040	switch (Entry.Kind) {
5041	case llvm::BitstreamEntry::SubBlock:
5042	if (llvm::Error Err = Stream.SkipBlock())
5043	return Err;
5044	continue;
5045	case llvm::BitstreamEntry::EndBlock:
5046	return llvm::Error::success();
5047	case llvm::BitstreamEntry::Error:
5048	return llvm::createStringError(EC: std::errc::illegal_byte_sequence,
5049	Fmt: "malformed block record in AST file");
5050	case llvm::BitstreamEntry::Record:
5051	break;
5052	}
5053
5054	Record.clear();
5055	StringRef Blob;
5056	Expected<unsigned> MaybeRecCode =
5057	Stream.readRecord(AbbrevID: Entry.ID, Vals&: Record, Blob: &Blob);
5058	if (!MaybeRecCode)
5059	return MaybeRecCode.takeError();
5060	switch (MaybeRecCode.get()) {
5061	case EXTENSION_METADATA: {
5062	ModuleFileExtensionMetadata Metadata;
5063	if (parseModuleFileExtensionMetadata(Record, Blob, Metadata))
5064	return llvm::createStringError(
5065	EC: std::errc::illegal_byte_sequence,
5066	Fmt: "malformed EXTENSION_METADATA in AST file");
5067
5068	// Find a module file extension with this block name.
5069	auto Known = ModuleFileExtensions.find(Key: Metadata.BlockName);
5070	if (Known == ModuleFileExtensions.end()) break;
5071
5072	// Form a reader.
5073	if (auto Reader = Known->second->createExtensionReader(Metadata, Reader&: *this,
5074	Mod&: F, Stream)) {
5075	F.ExtensionReaders.push_back(x: std::move(Reader));
5076	}
5077
5078	break;
5079	}
5080	}
5081	}
5082
5083	return llvm::Error::success();
5084	}
5085
5086	void ASTReader::InitializeContext() {
5087	assert(ContextObj && "no context to initialize");
5088	ASTContext &Context = *ContextObj;
5089
5090	// If there's a listener, notify them that we "read" the translation unit.
5091	if (DeserializationListener)
5092	DeserializationListener->DeclRead(PREDEF_DECL_TRANSLATION_UNIT_ID,
5093	Context.getTranslationUnitDecl());
5094
5095	// FIXME: Find a better way to deal with collisions between these
5096	// built-in types. Right now, we just ignore the problem.
5097
5098	// Load the special types.
5099	if (SpecialTypes.size() >= NumSpecialTypeIDs) {
5100	if (unsigned String = SpecialTypes[SPECIAL_TYPE_CF_CONSTANT_STRING]) {
5101	if (!Context.CFConstantStringTypeDecl)
5102	Context.setCFConstantStringType(GetType(ID: String));
5103	}
5104
5105	if (unsigned File = SpecialTypes[SPECIAL_TYPE_FILE]) {
5106	QualType FileType = GetType(ID: File);
5107	if (FileType.isNull()) {
5108	Error(Msg: "FILE type is NULL");
5109	return;
5110	}
5111
5112	if (!Context.FILEDecl) {
5113	if (const TypedefType *Typedef = FileType->getAs<TypedefType>())
5114	Context.setFILEDecl(Typedef->getDecl());
5115	else {
5116	const TagType *Tag = FileType->getAs<TagType>();
5117	if (!Tag) {
5118	Error(Msg: "Invalid FILE type in AST file");
5119	return;
5120	}
5121	Context.setFILEDecl(Tag->getDecl());
5122	}
5123	}
5124	}
5125
5126	if (unsigned Jmp_buf = SpecialTypes[SPECIAL_TYPE_JMP_BUF]) {
5127	QualType Jmp_bufType = GetType(ID: Jmp_buf);
5128	if (Jmp_bufType.isNull()) {
5129	Error(Msg: "jmp_buf type is NULL");
5130	return;
5131	}
5132
5133	if (!Context.jmp_bufDecl) {
5134	if (const TypedefType *Typedef = Jmp_bufType->getAs<TypedefType>())
5135	Context.setjmp_bufDecl(Typedef->getDecl());
5136	else {
5137	const TagType *Tag = Jmp_bufType->getAs<TagType>();
5138	if (!Tag) {
5139	Error(Msg: "Invalid jmp_buf type in AST file");
5140	return;
5141	}
5142	Context.setjmp_bufDecl(Tag->getDecl());
5143	}
5144	}
5145	}
5146
5147	if (unsigned Sigjmp_buf = SpecialTypes[SPECIAL_TYPE_SIGJMP_BUF]) {
5148	QualType Sigjmp_bufType = GetType(ID: Sigjmp_buf);
5149	if (Sigjmp_bufType.isNull()) {
5150	Error(Msg: "sigjmp_buf type is NULL");
5151	return;
5152	}
5153
5154	if (!Context.sigjmp_bufDecl) {
5155	if (const TypedefType *Typedef = Sigjmp_bufType->getAs<TypedefType>())
5156	Context.setsigjmp_bufDecl(Typedef->getDecl());
5157	else {
5158	const TagType *Tag = Sigjmp_bufType->getAs<TagType>();
5159	assert(Tag && "Invalid sigjmp_buf type in AST file");
5160	Context.setsigjmp_bufDecl(Tag->getDecl());
5161	}
5162	}
5163	}
5164
5165	if (unsigned ObjCIdRedef
5166	= SpecialTypes[SPECIAL_TYPE_OBJC_ID_REDEFINITION]) {
5167	if (Context.ObjCIdRedefinitionType.isNull())
5168	Context.ObjCIdRedefinitionType = GetType(ID: ObjCIdRedef);
5169	}
5170
5171	if (unsigned ObjCClassRedef
5172	= SpecialTypes[SPECIAL_TYPE_OBJC_CLASS_REDEFINITION]) {
5173	if (Context.ObjCClassRedefinitionType.isNull())
5174	Context.ObjCClassRedefinitionType = GetType(ID: ObjCClassRedef);
5175	}
5176
5177	if (unsigned ObjCSelRedef
5178	= SpecialTypes[SPECIAL_TYPE_OBJC_SEL_REDEFINITION]) {
5179	if (Context.ObjCSelRedefinitionType.isNull())
5180	Context.ObjCSelRedefinitionType = GetType(ID: ObjCSelRedef);
5181	}
5182
5183	if (unsigned Ucontext_t = SpecialTypes[SPECIAL_TYPE_UCONTEXT_T]) {
5184	QualType Ucontext_tType = GetType(ID: Ucontext_t);
5185	if (Ucontext_tType.isNull()) {
5186	Error(Msg: "ucontext_t type is NULL");
5187	return;
5188	}
5189
5190	if (!Context.ucontext_tDecl) {
5191	if (const TypedefType *Typedef = Ucontext_tType->getAs<TypedefType>())
5192	Context.setucontext_tDecl(Typedef->getDecl());
5193	else {
5194	const TagType *Tag = Ucontext_tType->getAs<TagType>();
5195	assert(Tag && "Invalid ucontext_t type in AST file");
5196	Context.setucontext_tDecl(Tag->getDecl());
5197	}
5198	}
5199	}
5200	}
5201
5202	ReadPragmaDiagnosticMappings(Diag&: Context.getDiagnostics());
5203
5204	// If there were any CUDA special declarations, deserialize them.
5205	if (!CUDASpecialDeclRefs.empty()) {
5206	assert(CUDASpecialDeclRefs.size() == 1 && "More decl refs than expected!");
5207	Context.setcudaConfigureCallDecl(
5208	cast<FunctionDecl>(Val: GetDecl(ID: CUDASpecialDeclRefs[0])));
5209	}
5210
5211	// Re-export any modules that were imported by a non-module AST file.
5212	// FIXME: This does not make macro-only imports visible again.
5213	for (auto &Import : PendingImportedModules) {
5214	if (Module *Imported = getSubmodule(GlobalID: Import.ID)) {
5215	makeModuleVisible(Mod: Imported, NameVisibility: Module::AllVisible,
5216	/*ImportLoc=*/Import.ImportLoc);
5217	if (Import.ImportLoc.isValid())
5218	PP.makeModuleVisible(M: Imported, Loc: Import.ImportLoc);
5219	// This updates visibility for Preprocessor only. For Sema, which can be
5220	// nullptr here, we do the same later, in UpdateSema().
5221	}
5222	}
5223
5224	// Hand off these modules to Sema.
5225	PendingImportedModulesSema.append(RHS: PendingImportedModules);
5226	PendingImportedModules.clear();
5227	}
5228
5229	void ASTReader::finalizeForWriting() {
5230	// Nothing to do for now.
5231	}
5232
5233	/// Reads and return the signature record from \p PCH's control block, or
5234	/// else returns 0.
5235	static ASTFileSignature readASTFileSignature(StringRef PCH) {
5236	BitstreamCursor Stream(PCH);
5237	if (llvm::Error Err = doesntStartWithASTFileMagic(Stream)) {
5238	// FIXME this drops the error on the floor.
5239	consumeError(Err: std::move(Err));
5240	return ASTFileSignature();
5241	}
5242
5243	// Scan for the UNHASHED_CONTROL_BLOCK_ID block.
5244	if (SkipCursorToBlock(Cursor&: Stream, BlockID: UNHASHED_CONTROL_BLOCK_ID))
5245	return ASTFileSignature();
5246
5247	// Scan for SIGNATURE inside the diagnostic options block.
5248	ASTReader::RecordData Record;
5249	while (true) {
5250	Expected<llvm::BitstreamEntry> MaybeEntry =
5251	Stream.advanceSkippingSubblocks();
5252	if (!MaybeEntry) {
5253	// FIXME this drops the error on the floor.
5254	consumeError(Err: MaybeEntry.takeError());
5255	return ASTFileSignature();
5256	}
5257	llvm::BitstreamEntry Entry = MaybeEntry.get();
5258
5259	if (Entry.Kind != llvm::BitstreamEntry::Record)
5260	return ASTFileSignature();
5261
5262	Record.clear();
5263	StringRef Blob;
5264	Expected<unsigned> MaybeRecord = Stream.readRecord(AbbrevID: Entry.ID, Vals&: Record, Blob: &Blob);
5265	if (!MaybeRecord) {
5266	// FIXME this drops the error on the floor.
5267	consumeError(Err: MaybeRecord.takeError());
5268	return ASTFileSignature();
5269	}
5270	if (SIGNATURE == MaybeRecord.get()) {
5271	auto Signature = ASTFileSignature::create(First: Blob.begin(), Last: Blob.end());
5272	assert(Signature != ASTFileSignature::createDummy() &&
5273	"Dummy AST file signature not backpatched in ASTWriter.");
5274	return Signature;
5275	}
5276	}
5277	}
5278
5279	/// Retrieve the name of the original source file name
5280	/// directly from the AST file, without actually loading the AST
5281	/// file.
5282	std::string ASTReader::getOriginalSourceFile(
5283	const std::string &ASTFileName, FileManager &FileMgr,
5284	const PCHContainerReader &PCHContainerRdr, DiagnosticsEngine &Diags) {
5285	// Open the AST file.
5286	auto Buffer = FileMgr.getBufferForFile(Filename: ASTFileName, /*IsVolatile=*/isVolatile: false,
5287	/*RequiresNullTerminator=*/false);
5288	if (!Buffer) {
5289	Diags.Report(diag::err_fe_unable_to_read_pch_file)
5290	<< ASTFileName << Buffer.getError().message();
5291	return std::string();
5292	}
5293
5294	// Initialize the stream
5295	BitstreamCursor Stream(PCHContainerRdr.ExtractPCH(Buffer: **Buffer));
5296
5297	// Sniff for the signature.
5298	if (llvm::Error Err = doesntStartWithASTFileMagic(Stream)) {
5299	Diags.Report(diag::err_fe_not_a_pch_file) << ASTFileName << std::move(Err);
5300	return std::string();
5301	}
5302
5303	// Scan for the CONTROL_BLOCK_ID block.
5304	if (SkipCursorToBlock(Cursor&: Stream, BlockID: CONTROL_BLOCK_ID)) {
5305	Diags.Report(diag::err_fe_pch_malformed_block) << ASTFileName;
5306	return std::string();
5307	}
5308
5309	// Scan for ORIGINAL_FILE inside the control block.
5310	RecordData Record;
5311	while (true) {
5312	Expected<llvm::BitstreamEntry> MaybeEntry =
5313	Stream.advanceSkippingSubblocks();
5314	if (!MaybeEntry) {
5315	// FIXME this drops errors on the floor.
5316	consumeError(Err: MaybeEntry.takeError());
5317	return std::string();
5318	}
5319	llvm::BitstreamEntry Entry = MaybeEntry.get();
5320
5321	if (Entry.Kind == llvm::BitstreamEntry::EndBlock)
5322	return std::string();
5323
5324	if (Entry.Kind != llvm::BitstreamEntry::Record) {
5325	Diags.Report(diag::err_fe_pch_malformed_block) << ASTFileName;
5326	return std::string();
5327	}
5328
5329	Record.clear();
5330	StringRef Blob;
5331	Expected<unsigned> MaybeRecord = Stream.readRecord(AbbrevID: Entry.ID, Vals&: Record, Blob: &Blob);
5332	if (!MaybeRecord) {
5333	// FIXME this drops the errors on the floor.
5334	consumeError(Err: MaybeRecord.takeError());
5335	return std::string();
5336	}
5337	if (ORIGINAL_FILE == MaybeRecord.get())
5338	return Blob.str();
5339	}
5340	}
5341
5342	namespace {
5343
5344	class SimplePCHValidator : public ASTReaderListener {
5345	const LangOptions &ExistingLangOpts;
5346	const TargetOptions &ExistingTargetOpts;
5347	const PreprocessorOptions &ExistingPPOpts;
5348	std::string ExistingModuleCachePath;
5349	FileManager &FileMgr;
5350	bool StrictOptionMatches;
5351
5352	public:
5353	SimplePCHValidator(const LangOptions &ExistingLangOpts,
5354	const TargetOptions &ExistingTargetOpts,
5355	const PreprocessorOptions &ExistingPPOpts,
5356	StringRef ExistingModuleCachePath, FileManager &FileMgr,
5357	bool StrictOptionMatches)
5358	: ExistingLangOpts(ExistingLangOpts),
5359	ExistingTargetOpts(ExistingTargetOpts),
5360	ExistingPPOpts(ExistingPPOpts),
5361	ExistingModuleCachePath(ExistingModuleCachePath), FileMgr(FileMgr),
5362	StrictOptionMatches(StrictOptionMatches) {}
5363
5364	bool ReadLanguageOptions(const LangOptions &LangOpts, bool Complain,
5365	bool AllowCompatibleDifferences) override {
5366	return checkLanguageOptions(LangOpts: ExistingLangOpts, ExistingLangOpts: LangOpts, Diags: nullptr,
5367	AllowCompatibleDifferences);
5368	}
5369
5370	bool ReadTargetOptions(const TargetOptions &TargetOpts, bool Complain,
5371	bool AllowCompatibleDifferences) override {
5372	return checkTargetOptions(TargetOpts: ExistingTargetOpts, ExistingTargetOpts: TargetOpts, Diags: nullptr,
5373	AllowCompatibleDifferences);
5374	}
5375
5376	bool ReadHeaderSearchOptions(const HeaderSearchOptions &HSOpts,
5377	StringRef SpecificModuleCachePath,
5378	bool Complain) override {
5379	return checkHeaderSearchOptions(HSOpts, SpecificModuleCachePath,
5380	ExistingModuleCachePath, Diags: nullptr,
5381	LangOpts: ExistingLangOpts, PPOpts: ExistingPPOpts);
5382	}
5383
5384	bool ReadPreprocessorOptions(const PreprocessorOptions &PPOpts,
5385	bool ReadMacros, bool Complain,
5386	std::string &SuggestedPredefines) override {
5387	return checkPreprocessorOptions(
5388	PPOpts, ExistingPPOpts, ReadMacros, /*Diags=*/nullptr, FileMgr,
5389	SuggestedPredefines, LangOpts: ExistingLangOpts,
5390	Validation: StrictOptionMatches ? OptionValidateStrictMatches
5391	: OptionValidateContradictions);
5392	}
5393	};
5394
5395	} // namespace
5396
5397	bool ASTReader::readASTFileControlBlock(
5398	StringRef Filename, FileManager &FileMgr,
5399	const InMemoryModuleCache &ModuleCache,
5400	const PCHContainerReader &PCHContainerRdr, bool FindModuleFileExtensions,
5401	ASTReaderListener &Listener, bool ValidateDiagnosticOptions,
5402	unsigned ClientLoadCapabilities) {
5403	// Open the AST file.
5404	std::unique_ptr<llvm::MemoryBuffer> OwnedBuffer;
5405	llvm::MemoryBuffer *Buffer = ModuleCache.lookupPCM(Filename);
5406	if (!Buffer) {
5407	// FIXME: We should add the pcm to the InMemoryModuleCache if it could be
5408	// read again later, but we do not have the context here to determine if it
5409	// is safe to change the result of InMemoryModuleCache::getPCMState().
5410
5411	// FIXME: This allows use of the VFS; we do not allow use of the
5412	// VFS when actually loading a module.
5413	auto BufferOrErr = FileMgr.getBufferForFile(Filename);
5414	if (!BufferOrErr)
5415	return true;
5416	OwnedBuffer = std::move(*BufferOrErr);
5417	Buffer = OwnedBuffer.get();
5418	}
5419
5420	// Initialize the stream
5421	StringRef Bytes = PCHContainerRdr.ExtractPCH(Buffer: *Buffer);
5422	BitstreamCursor Stream(Bytes);
5423
5424	// Sniff for the signature.
5425	if (llvm::Error Err = doesntStartWithASTFileMagic(Stream)) {
5426	consumeError(Err: std::move(Err)); // FIXME this drops errors on the floor.
5427	return true;
5428	}
5429
5430	// Scan for the CONTROL_BLOCK_ID block.
5431	if (SkipCursorToBlock(Cursor&: Stream, BlockID: CONTROL_BLOCK_ID))
5432	return true;
5433
5434	bool NeedsInputFiles = Listener.needsInputFileVisitation();
5435	bool NeedsSystemInputFiles = Listener.needsSystemInputFileVisitation();
5436	bool NeedsImports = Listener.needsImportVisitation();
5437	BitstreamCursor InputFilesCursor;
5438	uint64_t InputFilesOffsetBase = 0;
5439
5440	RecordData Record;
5441	std::string ModuleDir;
5442	bool DoneWithControlBlock = false;
5443	while (!DoneWithControlBlock) {
5444	Expected<llvm::BitstreamEntry> MaybeEntry = Stream.advance();
5445	if (!MaybeEntry) {
5446	// FIXME this drops the error on the floor.
5447	consumeError(Err: MaybeEntry.takeError());
5448	return true;
5449	}
5450	llvm::BitstreamEntry Entry = MaybeEntry.get();
5451
5452	switch (Entry.Kind) {
5453	case llvm::BitstreamEntry::SubBlock: {
5454	switch (Entry.ID) {
5455	case OPTIONS_BLOCK_ID: {
5456	std::string IgnoredSuggestedPredefines;
5457	if (ReadOptionsBlock(Stream, ClientLoadCapabilities,
5458	/*AllowCompatibleConfigurationMismatch*/ false,
5459	Listener, SuggestedPredefines&: IgnoredSuggestedPredefines) != Success)
5460	return true;
5461	break;
5462	}
5463
5464	case INPUT_FILES_BLOCK_ID:
5465	InputFilesCursor = Stream;
5466	if (llvm::Error Err = Stream.SkipBlock()) {
5467	// FIXME this drops the error on the floor.
5468	consumeError(Err: std::move(Err));
5469	return true;
5470	}
5471	if (NeedsInputFiles &&
5472	ReadBlockAbbrevs(Cursor&: InputFilesCursor, BlockID: INPUT_FILES_BLOCK_ID))
5473	return true;
5474	InputFilesOffsetBase = InputFilesCursor.GetCurrentBitNo();
5475	break;
5476
5477	default:
5478	if (llvm::Error Err = Stream.SkipBlock()) {
5479	// FIXME this drops the error on the floor.
5480	consumeError(Err: std::move(Err));
5481	return true;
5482	}
5483	break;
5484	}
5485
5486	continue;
5487	}
5488
5489	case llvm::BitstreamEntry::EndBlock:
5490	DoneWithControlBlock = true;
5491	break;
5492
5493	case llvm::BitstreamEntry::Error:
5494	return true;
5495
5496	case llvm::BitstreamEntry::Record:
5497	break;
5498	}
5499
5500	if (DoneWithControlBlock) break;
5501
5502	Record.clear();
5503	StringRef Blob;
5504	Expected<unsigned> MaybeRecCode =
5505	Stream.readRecord(AbbrevID: Entry.ID, Vals&: Record, Blob: &Blob);
5506	if (!MaybeRecCode) {
5507	// FIXME this drops the error.
5508	return Failure;
5509	}
5510	switch ((ControlRecordTypes)MaybeRecCode.get()) {
5511	case METADATA:
5512	if (Record[0] != VERSION_MAJOR)
5513	return true;
5514	if (Listener.ReadFullVersionInformation(FullVersion: Blob))
5515	return true;
5516	break;
5517	case MODULE_NAME:
5518	Listener.ReadModuleName(ModuleName: Blob);
5519	break;
5520	case MODULE_DIRECTORY:
5521	ModuleDir = std::string(Blob);
5522	break;
5523	case MODULE_MAP_FILE: {
5524	unsigned Idx = 0;
5525	auto Path = ReadString(Record, Idx);
5526	ResolveImportedPath(Filename&: Path, Prefix: ModuleDir);
5527	Listener.ReadModuleMapFile(ModuleMapPath: Path);
5528	break;
5529	}
5530	case INPUT_FILE_OFFSETS: {
5531	if (!NeedsInputFiles)
5532	break;
5533
5534	unsigned NumInputFiles = Record[0];
5535	unsigned NumUserFiles = Record[1];
5536	const llvm::support::unaligned_uint64_t *InputFileOffs =
5537	(const llvm::support::unaligned_uint64_t *)Blob.data();
5538	for (unsigned I = 0; I != NumInputFiles; ++I) {
5539	// Go find this input file.
5540	bool isSystemFile = I >= NumUserFiles;
5541
5542	if (isSystemFile && !NeedsSystemInputFiles)
5543	break; // the rest are system input files
5544
5545	BitstreamCursor &Cursor = InputFilesCursor;
5546	SavedStreamPosition SavedPosition(Cursor);
5547	if (llvm::Error Err =
5548	Cursor.JumpToBit(BitNo: InputFilesOffsetBase + InputFileOffs[I])) {
5549	// FIXME this drops errors on the floor.
5550	consumeError(Err: std::move(Err));
5551	}
5552
5553	Expected<unsigned> MaybeCode = Cursor.ReadCode();
5554	if (!MaybeCode) {
5555	// FIXME this drops errors on the floor.
5556	consumeError(Err: MaybeCode.takeError());
5557	}
5558	unsigned Code = MaybeCode.get();
5559
5560	RecordData Record;
5561	StringRef Blob;
5562	bool shouldContinue = false;
5563	Expected<unsigned> MaybeRecordType =
5564	Cursor.readRecord(AbbrevID: Code, Vals&: Record, Blob: &Blob);
5565	if (!MaybeRecordType) {
5566	// FIXME this drops errors on the floor.
5567	consumeError(Err: MaybeRecordType.takeError());
5568	}
5569	switch ((InputFileRecordTypes)MaybeRecordType.get()) {
5570	case INPUT_FILE_HASH:
5571	break;
5572	case INPUT_FILE:
5573	bool Overridden = static_cast<bool>(Record[3]);
5574	std::string Filename = std::string(Blob);
5575	ResolveImportedPath(Filename, Prefix: ModuleDir);
5576	shouldContinue = Listener.visitInputFile(
5577	Filename, isSystem: isSystemFile, isOverridden: Overridden, /*IsExplicitModule*/isExplicitModule: false);
5578	break;
5579	}
5580	if (!shouldContinue)
5581	break;
5582	}
5583	break;
5584	}
5585
5586	case IMPORTS: {
5587	if (!NeedsImports)
5588	break;
5589
5590	unsigned Idx = 0, N = Record.size();
5591	while (Idx < N) {
5592	// Read information about the AST file.
5593
5594	// Skip Kind
5595	Idx++;
5596	bool IsStandardCXXModule = Record[Idx++];
5597
5598	// Skip ImportLoc
5599	Idx++;
5600
5601	// In C++20 Modules, we don't record the path to imported
5602	// modules in the BMI files.
5603	if (IsStandardCXXModule) {
5604	std::string ModuleName = ReadString(Record, Idx);
5605	Listener.visitImport(ModuleName, /*Filename=*/"");
5606	continue;
5607	}
5608
5609	// Skip Size, ModTime and Signature
5610	Idx += 1 + 1 + ASTFileSignature::size;
5611	std::string ModuleName = ReadString(Record, Idx);
5612	std::string Filename = ReadString(Record, Idx);
5613	ResolveImportedPath(Filename, Prefix: ModuleDir);
5614	Listener.visitImport(ModuleName, Filename);
5615	}
5616	break;
5617	}
5618
5619	default:
5620	// No other validation to perform.
5621	break;
5622	}
5623	}
5624
5625	// Look for module file extension blocks, if requested.
5626	if (FindModuleFileExtensions) {
5627	BitstreamCursor SavedStream = Stream;
5628	while (!SkipCursorToBlock(Cursor&: Stream, BlockID: EXTENSION_BLOCK_ID)) {
5629	bool DoneWithExtensionBlock = false;
5630	while (!DoneWithExtensionBlock) {
5631	Expected<llvm::BitstreamEntry> MaybeEntry = Stream.advance();
5632	if (!MaybeEntry) {
5633	// FIXME this drops the error.
5634	return true;
5635	}
5636	llvm::BitstreamEntry Entry = MaybeEntry.get();
5637
5638	switch (Entry.Kind) {
5639	case llvm::BitstreamEntry::SubBlock:
5640	if (llvm::Error Err = Stream.SkipBlock()) {
5641	// FIXME this drops the error on the floor.
5642	consumeError(Err: std::move(Err));
5643	return true;
5644	}
5645	continue;
5646
5647	case llvm::BitstreamEntry::EndBlock:
5648	DoneWithExtensionBlock = true;
5649	continue;
5650
5651	case llvm::BitstreamEntry::Error:
5652	return true;
5653
5654	case llvm::BitstreamEntry::Record:
5655	break;
5656	}
5657
5658	Record.clear();
5659	StringRef Blob;
5660	Expected<unsigned> MaybeRecCode =
5661	Stream.readRecord(AbbrevID: Entry.ID, Vals&: Record, Blob: &Blob);
5662	if (!MaybeRecCode) {
5663	// FIXME this drops the error.
5664	return true;
5665	}
5666	switch (MaybeRecCode.get()) {
5667	case EXTENSION_METADATA: {
5668	ModuleFileExtensionMetadata Metadata;
5669	if (parseModuleFileExtensionMetadata(Record, Blob, Metadata))
5670	return true;
5671
5672	Listener.readModuleFileExtension(Metadata);
5673	break;
5674	}
5675	}
5676	}
5677	}
5678	Stream = SavedStream;
5679	}
5680
5681	// Scan for the UNHASHED_CONTROL_BLOCK_ID block.
5682	if (readUnhashedControlBlockImpl(
5683	F: nullptr, StreamData: Bytes, ClientLoadCapabilities,
5684	/*AllowCompatibleConfigurationMismatch*/ false, Listener: &Listener,
5685	ValidateDiagnosticOptions) != Success)
5686	return true;
5687
5688	return false;
5689	}
5690
5691	bool ASTReader::isAcceptableASTFile(StringRef Filename, FileManager &FileMgr,
5692	const InMemoryModuleCache &ModuleCache,
5693	const PCHContainerReader &PCHContainerRdr,
5694	const LangOptions &LangOpts,
5695	const TargetOptions &TargetOpts,
5696	const PreprocessorOptions &PPOpts,
5697	StringRef ExistingModuleCachePath,
5698	bool RequireStrictOptionMatches) {
5699	SimplePCHValidator validator(LangOpts, TargetOpts, PPOpts,
5700	ExistingModuleCachePath, FileMgr,
5701	RequireStrictOptionMatches);
5702	return !readASTFileControlBlock(Filename, FileMgr, ModuleCache,
5703	PCHContainerRdr,
5704	/*FindModuleFileExtensions=*/false, Listener&: validator,
5705	/*ValidateDiagnosticOptions=*/true);
5706	}
5707
5708	llvm::Error ASTReader::ReadSubmoduleBlock(ModuleFile &F,
5709	unsigned ClientLoadCapabilities) {
5710	// Enter the submodule block.
5711	if (llvm::Error Err = F.Stream.EnterSubBlock(BlockID: SUBMODULE_BLOCK_ID))
5712	return Err;
5713
5714	ModuleMap &ModMap = PP.getHeaderSearchInfo().getModuleMap();
5715	bool First = true;
5716	Module *CurrentModule = nullptr;
5717	RecordData Record;
5718	while (true) {
5719	Expected<llvm::BitstreamEntry> MaybeEntry =
5720	F.Stream.advanceSkippingSubblocks();
5721	if (!MaybeEntry)
5722	return MaybeEntry.takeError();
5723	llvm::BitstreamEntry Entry = MaybeEntry.get();
5724
5725	switch (Entry.Kind) {
5726	case llvm::BitstreamEntry::SubBlock: // Handled for us already.
5727	case llvm::BitstreamEntry::Error:
5728	return llvm::createStringError(EC: std::errc::illegal_byte_sequence,
5729	Fmt: "malformed block record in AST file");
5730	case llvm::BitstreamEntry::EndBlock:
5731	return llvm::Error::success();
5732	case llvm::BitstreamEntry::Record:
5733	// The interesting case.
5734	break;
5735	}
5736
5737	// Read a record.
5738	StringRef Blob;
5739	Record.clear();
5740	Expected<unsigned> MaybeKind = F.Stream.readRecord(AbbrevID: Entry.ID, Vals&: Record, Blob: &Blob);
5741	if (!MaybeKind)
5742	return MaybeKind.takeError();
5743	unsigned Kind = MaybeKind.get();
5744
5745	if ((Kind == SUBMODULE_METADATA) != First)
5746	return llvm::createStringError(
5747	EC: std::errc::illegal_byte_sequence,
5748	Fmt: "submodule metadata record should be at beginning of block");
5749	First = false;
5750
5751	// Submodule information is only valid if we have a current module.
5752	// FIXME: Should we error on these cases?
5753	if (!CurrentModule && Kind != SUBMODULE_METADATA &&
5754	Kind != SUBMODULE_DEFINITION)
5755	continue;
5756
5757	switch (Kind) {
5758	default: // Default behavior: ignore.
5759	break;
5760
5761	case SUBMODULE_DEFINITION: {
5762	if (Record.size() < 13)
5763	return llvm::createStringError(EC: std::errc::illegal_byte_sequence,
5764	Fmt: "malformed module definition");
5765
5766	StringRef Name = Blob;
5767	unsigned Idx = 0;
5768	SubmoduleID GlobalID = getGlobalSubmoduleID(M&: F, LocalID: Record[Idx++]);
5769	SubmoduleID Parent = getGlobalSubmoduleID(M&: F, LocalID: Record[Idx++]);
5770	Module::ModuleKind Kind = (Module::ModuleKind)Record[Idx++];
5771	SourceLocation DefinitionLoc = ReadSourceLocation(ModuleFile&: F, Raw: Record[Idx++]);
5772	bool IsFramework = Record[Idx++];
5773	bool IsExplicit = Record[Idx++];
5774	bool IsSystem = Record[Idx++];
5775	bool IsExternC = Record[Idx++];
5776	bool InferSubmodules = Record[Idx++];
5777	bool InferExplicitSubmodules = Record[Idx++];
5778	bool InferExportWildcard = Record[Idx++];
5779	bool ConfigMacrosExhaustive = Record[Idx++];
5780	bool ModuleMapIsPrivate = Record[Idx++];
5781	bool NamedModuleHasInit = Record[Idx++];
5782
5783	Module *ParentModule = nullptr;
5784	if (Parent)
5785	ParentModule = getSubmodule(GlobalID: Parent);
5786
5787	// Retrieve this (sub)module from the module map, creating it if
5788	// necessary.
5789	CurrentModule =
5790	ModMap.findOrCreateModule(Name, Parent: ParentModule, IsFramework, IsExplicit)
5791	.first;
5792
5793	// FIXME: Call ModMap.setInferredModuleAllowedBy()
5794
5795	SubmoduleID GlobalIndex = GlobalID - NUM_PREDEF_SUBMODULE_IDS;
5796	if (GlobalIndex >= SubmodulesLoaded.size() ||
5797	SubmodulesLoaded[GlobalIndex])
5798	return llvm::createStringError(EC: std::errc::invalid_argument,
5799	Fmt: "too many submodules");
5800
5801	if (!ParentModule) {
5802	if (OptionalFileEntryRef CurFile = CurrentModule->getASTFile()) {
5803	// Don't emit module relocation error if we have -fno-validate-pch
5804	if (!bool(PP.getPreprocessorOpts().DisablePCHOrModuleValidation &
5805	DisableValidationForModuleKind::Module) &&
5806	CurFile != F.File) {
5807	auto ConflictError =
5808	PartialDiagnostic(diag::err_module_file_conflict,
5809	ContextObj->DiagAllocator)
5810	<< CurrentModule->getTopLevelModuleName() << CurFile->getName()
5811	<< F.File.getName();
5812	return DiagnosticError::create(Loc: CurrentImportLoc, Diag: ConflictError);
5813	}
5814	}
5815
5816	F.DidReadTopLevelSubmodule = true;
5817	CurrentModule->setASTFile(F.File);
5818	CurrentModule->PresumedModuleMapFile = F.ModuleMapPath;
5819	}
5820
5821	CurrentModule->Kind = Kind;
5822	CurrentModule->DefinitionLoc = DefinitionLoc;
5823	CurrentModule->Signature = F.Signature;
5824	CurrentModule->IsFromModuleFile = true;
5825	CurrentModule->IsSystem = IsSystem || CurrentModule->IsSystem;
5826	CurrentModule->IsExternC = IsExternC;
5827	CurrentModule->InferSubmodules = InferSubmodules;
5828	CurrentModule->InferExplicitSubmodules = InferExplicitSubmodules;
5829	CurrentModule->InferExportWildcard = InferExportWildcard;
5830	CurrentModule->ConfigMacrosExhaustive = ConfigMacrosExhaustive;
5831	CurrentModule->ModuleMapIsPrivate = ModuleMapIsPrivate;
5832	CurrentModule->NamedModuleHasInit = NamedModuleHasInit;
5833	if (DeserializationListener)
5834	DeserializationListener->ModuleRead(ID: GlobalID, Mod: CurrentModule);
5835
5836	SubmodulesLoaded[GlobalIndex] = CurrentModule;
5837
5838	// Clear out data that will be replaced by what is in the module file.
5839	CurrentModule->LinkLibraries.clear();
5840	CurrentModule->ConfigMacros.clear();
5841	CurrentModule->UnresolvedConflicts.clear();
5842	CurrentModule->Conflicts.clear();
5843
5844	// The module is available unless it's missing a requirement; relevant
5845	// requirements will be (re-)added by SUBMODULE_REQUIRES records.
5846	// Missing headers that were present when the module was built do not
5847	// make it unavailable -- if we got this far, this must be an explicitly
5848	// imported module file.
5849	CurrentModule->Requirements.clear();
5850	CurrentModule->MissingHeaders.clear();
5851	CurrentModule->IsUnimportable =
5852	ParentModule && ParentModule->IsUnimportable;
5853	CurrentModule->IsAvailable = !CurrentModule->IsUnimportable;
5854	break;
5855	}
5856
5857	case SUBMODULE_UMBRELLA_HEADER: {
5858	// FIXME: This doesn't work for framework modules as `Filename` is the
5859	// name as written in the module file and does not include
5860	// `Headers/`, so this path will never exist.
5861	std::string Filename = std::string(Blob);
5862	ResolveImportedPath(M&: F, Filename);
5863	if (auto Umbrella = PP.getFileManager().getOptionalFileRef(Filename)) {
5864	if (!CurrentModule->getUmbrellaHeaderAsWritten()) {
5865	// FIXME: NameAsWritten
5866	ModMap.setUmbrellaHeaderAsWritten(Mod: CurrentModule, UmbrellaHeader: *Umbrella, NameAsWritten: Blob, PathRelativeToRootModuleDirectory: "");
5867	}
5868	// Note that it's too late at this point to return out of date if the
5869	// name from the PCM doesn't match up with the one in the module map,
5870	// but also quite unlikely since we will have already checked the
5871	// modification time and size of the module map file itself.
5872	}
5873	break;
5874	}
5875
5876	case SUBMODULE_HEADER:
5877	case SUBMODULE_EXCLUDED_HEADER:
5878	case SUBMODULE_PRIVATE_HEADER:
5879	// We lazily associate headers with their modules via the HeaderInfo table.
5880	// FIXME: Re-evaluate this section; maybe only store InputFile IDs instead
5881	// of complete filenames or remove it entirely.
5882	break;
5883
5884	case SUBMODULE_TEXTUAL_HEADER:
5885	case SUBMODULE_PRIVATE_TEXTUAL_HEADER:
5886	// FIXME: Textual headers are not marked in the HeaderInfo table. Load
5887	// them here.
5888	break;
5889
5890	case SUBMODULE_TOPHEADER: {
5891	std::string HeaderName(Blob);
5892	ResolveImportedPath(M&: F, Filename&: HeaderName);
5893	CurrentModule->addTopHeaderFilename(Filename: HeaderName);
5894	break;
5895	}
5896
5897	case SUBMODULE_UMBRELLA_DIR: {
5898	// See comments in SUBMODULE_UMBRELLA_HEADER
5899	std::string Dirname = std::string(Blob);
5900	ResolveImportedPath(M&: F, Filename&: Dirname);
5901	if (auto Umbrella =
5902	PP.getFileManager().getOptionalDirectoryRef(DirName: Dirname)) {
5903	if (!CurrentModule->getUmbrellaDirAsWritten()) {
5904	// FIXME: NameAsWritten
5905	ModMap.setUmbrellaDirAsWritten(Mod: CurrentModule, UmbrellaDir: *Umbrella, NameAsWritten: Blob, PathRelativeToRootModuleDirectory: "");
5906	}
5907	}
5908	break;
5909	}
5910
5911	case SUBMODULE_METADATA: {
5912	F.BaseSubmoduleID = getTotalNumSubmodules();
5913	F.LocalNumSubmodules = Record[0];
5914	unsigned LocalBaseSubmoduleID = Record[1];
5915	if (F.LocalNumSubmodules > 0) {
5916	// Introduce the global -> local mapping for submodules within this
5917	// module.
5918	GlobalSubmoduleMap.insert(Val: std::make_pair(x: getTotalNumSubmodules()+1,y: &F));
5919
5920	// Introduce the local -> global mapping for submodules within this
5921	// module.
5922	F.SubmoduleRemap.insertOrReplace(
5923	Val: std::make_pair(x&: LocalBaseSubmoduleID,
5924	y: F.BaseSubmoduleID - LocalBaseSubmoduleID));
5925
5926	SubmodulesLoaded.resize(N: SubmodulesLoaded.size() + F.LocalNumSubmodules);
5927	}
5928	break;
5929	}
5930
5931	case SUBMODULE_IMPORTS:
5932	for (unsigned Idx = 0; Idx != Record.size(); ++Idx) {
5933	UnresolvedModuleRef Unresolved;
5934	Unresolved.File = &F;
5935	Unresolved.Mod = CurrentModule;
5936	Unresolved.ID = Record[Idx];
5937	Unresolved.Kind = UnresolvedModuleRef::Import;
5938	Unresolved.IsWildcard = false;
5939	UnresolvedModuleRefs.push_back(Elt: Unresolved);
5940	}
5941	break;
5942
5943	case SUBMODULE_AFFECTING_MODULES:
5944	for (unsigned Idx = 0; Idx != Record.size(); ++Idx) {
5945	UnresolvedModuleRef Unresolved;
5946	Unresolved.File = &F;
5947	Unresolved.Mod = CurrentModule;
5948	Unresolved.ID = Record[Idx];
5949	Unresolved.Kind = UnresolvedModuleRef::Affecting;
5950	Unresolved.IsWildcard = false;
5951	UnresolvedModuleRefs.push_back(Elt: Unresolved);
5952	}
5953	break;
5954
5955	case SUBMODULE_EXPORTS:
5956	for (unsigned Idx = 0; Idx + 1 < Record.size(); Idx += 2) {
5957	UnresolvedModuleRef Unresolved;
5958	Unresolved.File = &F;
5959	Unresolved.Mod = CurrentModule;
5960	Unresolved.ID = Record[Idx];
5961	Unresolved.Kind = UnresolvedModuleRef::Export;
5962	Unresolved.IsWildcard = Record[Idx + 1];
5963	UnresolvedModuleRefs.push_back(Elt: Unresolved);
5964	}
5965
5966	// Once we've loaded the set of exports, there's no reason to keep
5967	// the parsed, unresolved exports around.
5968	CurrentModule->UnresolvedExports.clear();
5969	break;
5970
5971	case SUBMODULE_REQUIRES:
5972	CurrentModule->addRequirement(Feature: Blob, RequiredState: Record[0], LangOpts: PP.getLangOpts(),
5973	Target: PP.getTargetInfo());
5974	break;
5975
5976	case SUBMODULE_LINK_LIBRARY:
5977	ModMap.resolveLinkAsDependencies(Mod: CurrentModule);
5978	CurrentModule->LinkLibraries.push_back(
5979	Elt: Module::LinkLibrary(std::string(Blob), Record[0]));
5980	break;
5981
5982	case SUBMODULE_CONFIG_MACRO:
5983	CurrentModule->ConfigMacros.push_back(x: Blob.str());
5984	break;
5985
5986	case SUBMODULE_CONFLICT: {
5987	UnresolvedModuleRef Unresolved;
5988	Unresolved.File = &F;
5989	Unresolved.Mod = CurrentModule;
5990	Unresolved.ID = Record[0];
5991	Unresolved.Kind = UnresolvedModuleRef::Conflict;
5992	Unresolved.IsWildcard = false;
5993	Unresolved.String = Blob;
5994	UnresolvedModuleRefs.push_back(Elt: Unresolved);
5995	break;
5996	}
5997
5998	case SUBMODULE_INITIALIZERS: {
5999	if (!ContextObj)
6000	break;
6001	SmallVector<uint32_t, 16> Inits;
6002	for (auto &ID : Record)
6003	Inits.push_back(Elt: getGlobalDeclID(F, LocalID: ID));
6004	ContextObj->addLazyModuleInitializers(M: CurrentModule, IDs: Inits);
6005	break;
6006	}
6007
6008	case SUBMODULE_EXPORT_AS:
6009	CurrentModule->ExportAsModule = Blob.str();
6010	ModMap.addLinkAsDependency(Mod: CurrentModule);
6011	break;
6012	}
6013	}
6014	}
6015
6016	/// Parse the record that corresponds to a LangOptions data
6017	/// structure.
6018	///
6019	/// This routine parses the language options from the AST file and then gives
6020	/// them to the AST listener if one is set.
6021	///
6022	/// \returns true if the listener deems the file unacceptable, false otherwise.
6023	bool ASTReader::ParseLanguageOptions(const RecordData &Record,
6024	bool Complain,
6025	ASTReaderListener &Listener,
6026	bool AllowCompatibleDifferences) {
6027	LangOptions LangOpts;
6028	unsigned Idx = 0;
6029	#define LANGOPT(Name, Bits, Default, Description) \
6030	LangOpts.Name = Record[Idx++];
6031	#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
6032	LangOpts.set##Name(static_cast<LangOptions::Type>(Record[Idx++]));
6033	#include "clang/Basic/LangOptions.def"
6034	#define SANITIZER(NAME, ID) \
6035	LangOpts.Sanitize.set(SanitizerKind::ID, Record[Idx++]);
6036	#include "clang/Basic/Sanitizers.def"
6037
6038	for (unsigned N = Record[Idx++]; N; --N)
6039	LangOpts.ModuleFeatures.push_back(x: ReadString(Record, Idx));
6040
6041	ObjCRuntime::Kind runtimeKind = (ObjCRuntime::Kind) Record[Idx++];
6042	VersionTuple runtimeVersion = ReadVersionTuple(Record, Idx);
6043	LangOpts.ObjCRuntime = ObjCRuntime(runtimeKind, runtimeVersion);
6044
6045	LangOpts.CurrentModule = ReadString(Record, Idx);
6046
6047	// Comment options.
6048	for (unsigned N = Record[Idx++]; N; --N) {
6049	LangOpts.CommentOpts.BlockCommandNames.push_back(
6050	x: ReadString(Record, Idx));
6051	}
6052	LangOpts.CommentOpts.ParseAllComments = Record[Idx++];
6053
6054	// OpenMP offloading options.
6055	for (unsigned N = Record[Idx++]; N; --N) {
6056	LangOpts.OMPTargetTriples.push_back(x: llvm::Triple(ReadString(Record, Idx)));
6057	}
6058
6059	LangOpts.OMPHostIRFile = ReadString(Record, Idx);
6060
6061	return Listener.ReadLanguageOptions(LangOpts, Complain,
6062	AllowCompatibleDifferences);
6063	}
6064
6065	bool ASTReader::ParseTargetOptions(const RecordData &Record, bool Complain,
6066	ASTReaderListener &Listener,
6067	bool AllowCompatibleDifferences) {
6068	unsigned Idx = 0;
6069	TargetOptions TargetOpts;
6070	TargetOpts.Triple = ReadString(Record, Idx);
6071	TargetOpts.CPU = ReadString(Record, Idx);
6072	TargetOpts.TuneCPU = ReadString(Record, Idx);
6073	TargetOpts.ABI = ReadString(Record, Idx);
6074	for (unsigned N = Record[Idx++]; N; --N) {
6075	TargetOpts.FeaturesAsWritten.push_back(x: ReadString(Record, Idx));
6076	}
6077	for (unsigned N = Record[Idx++]; N; --N) {
6078	TargetOpts.Features.push_back(x: ReadString(Record, Idx));
6079	}
6080
6081	return Listener.ReadTargetOptions(TargetOpts, Complain,
6082	AllowCompatibleDifferences);
6083	}
6084
6085	bool ASTReader::ParseDiagnosticOptions(const RecordData &Record, bool Complain,
6086	ASTReaderListener &Listener) {
6087	IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts(new DiagnosticOptions);
6088	unsigned Idx = 0;
6089	#define DIAGOPT(Name, Bits, Default) DiagOpts->Name = Record[Idx++];
6090	#define ENUM_DIAGOPT(Name, Type, Bits, Default) \
6091	DiagOpts->set##Name(static_cast<Type>(Record[Idx++]));
6092	#include "clang/Basic/DiagnosticOptions.def"
6093
6094	for (unsigned N = Record[Idx++]; N; --N)
6095	DiagOpts->Warnings.push_back(x: ReadString(Record, Idx));
6096	for (unsigned N = Record[Idx++]; N; --N)
6097	DiagOpts->Remarks.push_back(x: ReadString(Record, Idx));
6098
6099	return Listener.ReadDiagnosticOptions(DiagOpts, Complain);
6100	}
6101
6102	bool ASTReader::ParseFileSystemOptions(const RecordData &Record, bool Complain,
6103	ASTReaderListener &Listener) {
6104	FileSystemOptions FSOpts;
6105	unsigned Idx = 0;
6106	FSOpts.WorkingDir = ReadString(Record, Idx);
6107	return Listener.ReadFileSystemOptions(FSOpts, Complain);
6108	}
6109
6110	bool ASTReader::ParseHeaderSearchOptions(const RecordData &Record,
6111	bool Complain,
6112	ASTReaderListener &Listener) {
6113	HeaderSearchOptions HSOpts;
6114	unsigned Idx = 0;
6115	HSOpts.Sysroot = ReadString(Record, Idx);
6116
6117	HSOpts.ResourceDir = ReadString(Record, Idx);
6118	HSOpts.ModuleCachePath = ReadString(Record, Idx);
6119	HSOpts.ModuleUserBuildPath = ReadString(Record, Idx);
6120	HSOpts.DisableModuleHash = Record[Idx++];
6121	HSOpts.ImplicitModuleMaps = Record[Idx++];
6122	HSOpts.ModuleMapFileHomeIsCwd = Record[Idx++];
6123	HSOpts.EnablePrebuiltImplicitModules = Record[Idx++];
6124	HSOpts.UseBuiltinIncludes = Record[Idx++];
6125	HSOpts.UseStandardSystemIncludes = Record[Idx++];
6126	HSOpts.UseStandardCXXIncludes = Record[Idx++];
6127	HSOpts.UseLibcxx = Record[Idx++];
6128	std::string SpecificModuleCachePath = ReadString(Record, Idx);
6129
6130	return Listener.ReadHeaderSearchOptions(HSOpts, SpecificModuleCachePath,
6131	Complain);
6132	}
6133
6134	bool ASTReader::ParseHeaderSearchPaths(const RecordData &Record, bool Complain,
6135	ASTReaderListener &Listener) {
6136	HeaderSearchOptions HSOpts;
6137	unsigned Idx = 0;
6138
6139	// Include entries.
6140	for (unsigned N = Record[Idx++]; N; --N) {
6141	std::string Path = ReadString(Record, Idx);
6142	frontend::IncludeDirGroup Group
6143	= static_cast<frontend::IncludeDirGroup>(Record[Idx++]);
6144	bool IsFramework = Record[Idx++];
6145	bool IgnoreSysRoot = Record[Idx++];
6146	HSOpts.UserEntries.emplace_back(args: std::move(Path), args&: Group, args&: IsFramework,
6147	args&: IgnoreSysRoot);
6148	}
6149
6150	// System header prefixes.
6151	for (unsigned N = Record[Idx++]; N; --N) {
6152	std::string Prefix = ReadString(Record, Idx);
6153	bool IsSystemHeader = Record[Idx++];
6154	HSOpts.SystemHeaderPrefixes.emplace_back(args: std::move(Prefix), args&: IsSystemHeader);
6155	}
6156
6157	// VFS overlay files.
6158	for (unsigned N = Record[Idx++]; N; --N) {
6159	std::string VFSOverlayFile = ReadString(Record, Idx);
6160	HSOpts.VFSOverlayFiles.emplace_back(args: std::move(VFSOverlayFile));
6161	}
6162
6163	return Listener.ReadHeaderSearchPaths(HSOpts, Complain);
6164	}
6165
6166	bool ASTReader::ParsePreprocessorOptions(const RecordData &Record,
6167	bool Complain,
6168	ASTReaderListener &Listener,
6169	std::string &SuggestedPredefines) {
6170	PreprocessorOptions PPOpts;
6171	unsigned Idx = 0;
6172
6173	// Macro definitions/undefs
6174	bool ReadMacros = Record[Idx++];
6175	if (ReadMacros) {
6176	for (unsigned N = Record[Idx++]; N; --N) {
6177	std::string Macro = ReadString(Record, Idx);
6178	bool IsUndef = Record[Idx++];
6179	PPOpts.Macros.push_back(x: std::make_pair(x&: Macro, y&: IsUndef));
6180	}
6181	}
6182
6183	// Includes
6184	for (unsigned N = Record[Idx++]; N; --N) {
6185	PPOpts.Includes.push_back(x: ReadString(Record, Idx));
6186	}
6187
6188	// Macro Includes
6189	for (unsigned N = Record[Idx++]; N; --N) {
6190	PPOpts.MacroIncludes.push_back(x: ReadString(Record, Idx));
6191	}
6192
6193	PPOpts.UsePredefines = Record[Idx++];
6194	PPOpts.DetailedRecord = Record[Idx++];
6195	PPOpts.ImplicitPCHInclude = ReadString(Record, Idx);
6196	PPOpts.ObjCXXARCStandardLibrary =
6197	static_cast<ObjCXXARCStandardLibraryKind>(Record[Idx++]);
6198	SuggestedPredefines.clear();
6199	return Listener.ReadPreprocessorOptions(PPOpts, ReadMacros, Complain,
6200	SuggestedPredefines);
6201	}
6202
6203	std::pair<ModuleFile *, unsigned>
6204	ASTReader::getModulePreprocessedEntity(unsigned GlobalIndex) {
6205	GlobalPreprocessedEntityMapType::iterator
6206	I = GlobalPreprocessedEntityMap.find(K: GlobalIndex);
6207	assert(I != GlobalPreprocessedEntityMap.end() &&
6208	"Corrupted global preprocessed entity map");
6209	ModuleFile *M = I->second;
6210	unsigned LocalIndex = GlobalIndex - M->BasePreprocessedEntityID;
6211	return std::make_pair(x&: M, y&: LocalIndex);
6212	}
6213
6214	llvm::iterator_range<PreprocessingRecord::iterator>
6215	ASTReader::getModulePreprocessedEntities(ModuleFile &Mod) const {
6216	if (PreprocessingRecord *PPRec = PP.getPreprocessingRecord())
6217	return PPRec->getIteratorsForLoadedRange(start: Mod.BasePreprocessedEntityID,
6218	count: Mod.NumPreprocessedEntities);
6219
6220	return llvm::make_range(x: PreprocessingRecord::iterator(),
6221	y: PreprocessingRecord::iterator());
6222	}
6223
6224	bool ASTReader::canRecoverFromOutOfDate(StringRef ModuleFileName,
6225	unsigned int ClientLoadCapabilities) {
6226	return ClientLoadCapabilities & ARR_OutOfDate &&
6227	!getModuleManager().getModuleCache().isPCMFinal(Filename: ModuleFileName);
6228	}
6229
6230	llvm::iterator_range<ASTReader::ModuleDeclIterator>
6231	ASTReader::getModuleFileLevelDecls(ModuleFile &Mod) {
6232	return llvm::make_range(
6233	x: ModuleDeclIterator(this, &Mod, Mod.FileSortedDecls),
6234	y: ModuleDeclIterator(this, &Mod,
6235	Mod.FileSortedDecls + Mod.NumFileSortedDecls));
6236	}
6237
6238	SourceRange ASTReader::ReadSkippedRange(unsigned GlobalIndex) {
6239	auto I = GlobalSkippedRangeMap.find(K: GlobalIndex);
6240	assert(I != GlobalSkippedRangeMap.end() &&
6241	"Corrupted global skipped range map");
6242	ModuleFile *M = I->second;
6243	unsigned LocalIndex = GlobalIndex - M->BasePreprocessedSkippedRangeID;
6244	assert(LocalIndex < M->NumPreprocessedSkippedRanges);
6245	PPSkippedRange RawRange = M->PreprocessedSkippedRangeOffsets[LocalIndex];
6246	SourceRange Range(TranslateSourceLocation(ModuleFile&: *M, Loc: RawRange.getBegin()),
6247	TranslateSourceLocation(ModuleFile&: *M, Loc: RawRange.getEnd()));
6248	assert(Range.isValid());
6249	return Range;
6250	}
6251
6252	PreprocessedEntity *ASTReader::ReadPreprocessedEntity(unsigned Index) {
6253	PreprocessedEntityID PPID = Index+1;
6254	std::pair<ModuleFile *, unsigned> PPInfo = getModulePreprocessedEntity(GlobalIndex: Index);
6255	ModuleFile &M = *PPInfo.first;
6256	unsigned LocalIndex = PPInfo.second;
6257	const PPEntityOffset &PPOffs = M.PreprocessedEntityOffsets[LocalIndex];
6258
6259	if (!PP.getPreprocessingRecord()) {
6260	Error(Msg: "no preprocessing record");
6261	return nullptr;
6262	}
6263
6264	SavedStreamPosition SavedPosition(M.PreprocessorDetailCursor);
6265	if (llvm::Error Err = M.PreprocessorDetailCursor.JumpToBit(
6266	BitNo: M.MacroOffsetsBase + PPOffs.BitOffset)) {
6267	Error(Err: std::move(Err));
6268	return nullptr;
6269	}
6270
6271	Expected<llvm::BitstreamEntry> MaybeEntry =
6272	M.PreprocessorDetailCursor.advance(Flags: BitstreamCursor::AF_DontPopBlockAtEnd);
6273	if (!MaybeEntry) {
6274	Error(Err: MaybeEntry.takeError());
6275	return nullptr;
6276	}
6277	llvm::BitstreamEntry Entry = MaybeEntry.get();
6278
6279	if (Entry.Kind != llvm::BitstreamEntry::Record)
6280	return nullptr;
6281
6282	// Read the record.
6283	SourceRange Range(TranslateSourceLocation(ModuleFile&: M, Loc: PPOffs.getBegin()),
6284	TranslateSourceLocation(ModuleFile&: M, Loc: PPOffs.getEnd()));
6285	PreprocessingRecord &PPRec = *PP.getPreprocessingRecord();
6286	StringRef Blob;
6287	RecordData Record;
6288	Expected<unsigned> MaybeRecType =
6289	M.PreprocessorDetailCursor.readRecord(AbbrevID: Entry.ID, Vals&: Record, Blob: &Blob);
6290	if (!MaybeRecType) {
6291	Error(Err: MaybeRecType.takeError());
6292	return nullptr;
6293	}
6294	switch ((PreprocessorDetailRecordTypes)MaybeRecType.get()) {
6295	case PPD_MACRO_EXPANSION: {
6296	bool isBuiltin = Record[0];
6297	IdentifierInfo *Name = nullptr;
6298	MacroDefinitionRecord *Def = nullptr;
6299	if (isBuiltin)
6300	Name = getLocalIdentifier(M, LocalID: Record[1]);
6301	else {
6302	PreprocessedEntityID GlobalID =
6303	getGlobalPreprocessedEntityID(M, LocalID: Record[1]);
6304	Def = cast<MacroDefinitionRecord>(
6305	Val: PPRec.getLoadedPreprocessedEntity(Index: GlobalID - 1));
6306	}
6307
6308	MacroExpansion *ME;
6309	if (isBuiltin)
6310	ME = new (PPRec) MacroExpansion(Name, Range);
6311	else
6312	ME = new (PPRec) MacroExpansion(Def, Range);
6313
6314	return ME;
6315	}
6316
6317	case PPD_MACRO_DEFINITION: {
6318	// Decode the identifier info and then check again; if the macro is
6319	// still defined and associated with the identifier,
6320	IdentifierInfo *II = getLocalIdentifier(M, LocalID: Record[0]);
6321	MacroDefinitionRecord *MD = new (PPRec) MacroDefinitionRecord(II, Range);
6322
6323	if (DeserializationListener)
6324	DeserializationListener->MacroDefinitionRead(PPID, MD);
6325
6326	return MD;
6327	}
6328
6329	case PPD_INCLUSION_DIRECTIVE: {
6330	const char *FullFileNameStart = Blob.data() + Record[0];
6331	StringRef FullFileName(FullFileNameStart, Blob.size() - Record[0]);
6332	OptionalFileEntryRef File;
6333	if (!FullFileName.empty())
6334	File = PP.getFileManager().getOptionalFileRef(Filename: FullFileName);
6335
6336	// FIXME: Stable encoding
6337	InclusionDirective::InclusionKind Kind
6338	= static_cast<InclusionDirective::InclusionKind>(Record[2]);
6339	InclusionDirective *ID
6340	= new (PPRec) InclusionDirective(PPRec, Kind,
6341	StringRef(Blob.data(), Record[0]),
6342	Record[1], Record[3],
6343	File,
6344	Range);
6345	return ID;
6346	}
6347	}
6348
6349	llvm_unreachable("Invalid PreprocessorDetailRecordTypes");
6350	}
6351
6352	/// Find the next module that contains entities and return the ID
6353	/// of the first entry.
6354	///
6355	/// \param SLocMapI points at a chunk of a module that contains no
6356	/// preprocessed entities or the entities it contains are not the ones we are
6357	/// looking for.
6358	PreprocessedEntityID ASTReader::findNextPreprocessedEntity(
6359	GlobalSLocOffsetMapType::const_iterator SLocMapI) const {
6360	++SLocMapI;
6361	for (GlobalSLocOffsetMapType::const_iterator
6362	EndI = GlobalSLocOffsetMap.end(); SLocMapI != EndI; ++SLocMapI) {
6363	ModuleFile &M = *SLocMapI->second;
6364	if (M.NumPreprocessedEntities)
6365	return M.BasePreprocessedEntityID;
6366	}
6367
6368	return getTotalNumPreprocessedEntities();
6369	}
6370
6371	namespace {
6372
6373	struct PPEntityComp {
6374	const ASTReader &Reader;
6375	ModuleFile &M;
6376
6377	PPEntityComp(const ASTReader &Reader, ModuleFile &M) : Reader(Reader), M(M) {}
6378
6379	bool operator()(const PPEntityOffset &L, const PPEntityOffset &R) const {
6380	SourceLocation LHS = getLoc(PPE: L);
6381	SourceLocation RHS = getLoc(PPE: R);
6382	return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
6383	}
6384
6385	bool operator()(const PPEntityOffset &L, SourceLocation RHS) const {
6386	SourceLocation LHS = getLoc(PPE: L);
6387	return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
6388	}
6389
6390	bool operator()(SourceLocation LHS, const PPEntityOffset &R) const {
6391	SourceLocation RHS = getLoc(PPE: R);
6392	return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
6393	}
6394
6395	SourceLocation getLoc(const PPEntityOffset &PPE) const {
6396	return Reader.TranslateSourceLocation(ModuleFile&: M, Loc: PPE.getBegin());
6397	}
6398	};
6399
6400	} // namespace
6401
6402	PreprocessedEntityID ASTReader::findPreprocessedEntity(SourceLocation Loc,
6403	bool EndsAfter) const {
6404	if (SourceMgr.isLocalSourceLocation(Loc))
6405	return getTotalNumPreprocessedEntities();
6406
6407	GlobalSLocOffsetMapType::const_iterator SLocMapI = GlobalSLocOffsetMap.find(
6408	K: SourceManager::MaxLoadedOffset - Loc.getOffset() - 1);
6409	assert(SLocMapI != GlobalSLocOffsetMap.end() &&
6410	"Corrupted global sloc offset map");
6411
6412	if (SLocMapI->second->NumPreprocessedEntities == 0)
6413	return findNextPreprocessedEntity(SLocMapI);
6414
6415	ModuleFile &M = *SLocMapI->second;
6416
6417	using pp_iterator = const PPEntityOffset *;
6418
6419	pp_iterator pp_begin = M.PreprocessedEntityOffsets;
6420	pp_iterator pp_end = pp_begin + M.NumPreprocessedEntities;
6421
6422	size_t Count = M.NumPreprocessedEntities;
6423	size_t Half;
6424	pp_iterator First = pp_begin;
6425	pp_iterator PPI;
6426
6427	if (EndsAfter) {
6428	PPI = std::upper_bound(first: pp_begin, last: pp_end, val: Loc,
6429	comp: PPEntityComp(*this, M));
6430	} else {
6431	// Do a binary search manually instead of using std::lower_bound because
6432	// The end locations of entities may be unordered (when a macro expansion
6433	// is inside another macro argument), but for this case it is not important
6434	// whether we get the first macro expansion or its containing macro.
6435	while (Count > 0) {
6436	Half = Count / 2;
6437	PPI = First;
6438	std::advance(i&: PPI, n: Half);
6439	if (SourceMgr.isBeforeInTranslationUnit(
6440	LHS: TranslateSourceLocation(ModuleFile&: M, Loc: PPI->getEnd()), RHS: Loc)) {
6441	First = PPI;
6442	++First;
6443	Count = Count - Half - 1;
6444	} else
6445	Count = Half;
6446	}
6447	}
6448
6449	if (PPI == pp_end)
6450	return findNextPreprocessedEntity(SLocMapI);
6451
6452	return M.BasePreprocessedEntityID + (PPI - pp_begin);
6453	}
6454
6455	/// Returns a pair of [Begin, End) indices of preallocated
6456	/// preprocessed entities that \arg Range encompasses.
6457	std::pair<unsigned, unsigned>
6458	ASTReader::findPreprocessedEntitiesInRange(SourceRange Range) {
6459	if (Range.isInvalid())
6460	return std::make_pair(x: 0,y: 0);
6461	assert(!SourceMgr.isBeforeInTranslationUnit(Range.getEnd(),Range.getBegin()));
6462
6463	PreprocessedEntityID BeginID =
6464	findPreprocessedEntity(Loc: Range.getBegin(), EndsAfter: false);
6465	PreprocessedEntityID EndID = findPreprocessedEntity(Loc: Range.getEnd(), EndsAfter: true);
6466	return std::make_pair(x&: BeginID, y&: EndID);
6467	}
6468
6469	/// Optionally returns true or false if the preallocated preprocessed
6470	/// entity with index \arg Index came from file \arg FID.
6471	std::optional<bool> ASTReader::isPreprocessedEntityInFileID(unsigned Index,
6472	FileID FID) {
6473	if (FID.isInvalid())
6474	return false;
6475
6476	std::pair<ModuleFile *, unsigned> PPInfo = getModulePreprocessedEntity(GlobalIndex: Index);
6477	ModuleFile &M = *PPInfo.first;
6478	unsigned LocalIndex = PPInfo.second;
6479	const PPEntityOffset &PPOffs = M.PreprocessedEntityOffsets[LocalIndex];
6480
6481	SourceLocation Loc = TranslateSourceLocation(ModuleFile&: M, Loc: PPOffs.getBegin());
6482	if (Loc.isInvalid())
6483	return false;
6484
6485	if (SourceMgr.isInFileID(Loc: SourceMgr.getFileLoc(Loc), FID))
6486	return true;
6487	else
6488	return false;
6489	}
6490
6491	namespace {
6492
6493	/// Visitor used to search for information about a header file.
6494	class HeaderFileInfoVisitor {
6495	FileEntryRef FE;
6496	std::optional<HeaderFileInfo> HFI;
6497
6498	public:
6499	explicit HeaderFileInfoVisitor(FileEntryRef FE) : FE(FE) {}
6500
6501	bool operator()(ModuleFile &M) {
6502	HeaderFileInfoLookupTable *Table
6503	= static_cast<HeaderFileInfoLookupTable *>(M.HeaderFileInfoTable);
6504	if (!Table)
6505	return false;
6506
6507	// Look in the on-disk hash table for an entry for this file name.
6508	HeaderFileInfoLookupTable::iterator Pos = Table->find(EKey: FE);
6509	if (Pos == Table->end())
6510	return false;
6511
6512	HFI = *Pos;
6513	return true;
6514	}
6515
6516	std::optional<HeaderFileInfo> getHeaderFileInfo() const { return HFI; }
6517	};
6518
6519	} // namespace
6520
6521	HeaderFileInfo ASTReader::GetHeaderFileInfo(FileEntryRef FE) {
6522	HeaderFileInfoVisitor Visitor(FE);
6523	ModuleMgr.visit(Visitor);
6524	if (std::optional<HeaderFileInfo> HFI = Visitor.getHeaderFileInfo())
6525	return *HFI;
6526
6527	return HeaderFileInfo();
6528	}
6529
6530	void ASTReader::ReadPragmaDiagnosticMappings(DiagnosticsEngine &Diag) {
6531	using DiagState = DiagnosticsEngine::DiagState;
6532	SmallVector<DiagState *, 32> DiagStates;
6533
6534	for (ModuleFile &F : ModuleMgr) {
6535	unsigned Idx = 0;
6536	auto &Record = F.PragmaDiagMappings;
6537	if (Record.empty())
6538	continue;
6539
6540	DiagStates.clear();
6541
6542	auto ReadDiagState = [&](const DiagState &BasedOn,
6543	bool IncludeNonPragmaStates) {
6544	unsigned BackrefID = Record[Idx++];
6545	if (BackrefID != 0)
6546	return DiagStates[BackrefID - 1];
6547
6548	// A new DiagState was created here.
6549	Diag.DiagStates.push_back(x: BasedOn);
6550	DiagState *NewState = &Diag.DiagStates.back();
6551	DiagStates.push_back(Elt: NewState);
6552	unsigned Size = Record[Idx++];
6553	assert(Idx + Size * 2 <= Record.size() &&
6554	"Invalid data, not enough diag/map pairs");
6555	while (Size--) {
6556	unsigned DiagID = Record[Idx++];
6557	DiagnosticMapping NewMapping =
6558	DiagnosticMapping::deserialize(Bits: Record[Idx++]);
6559	if (!NewMapping.isPragma() && !IncludeNonPragmaStates)
6560	continue;
6561
6562	DiagnosticMapping &Mapping = NewState->getOrAddMapping(Diag: DiagID);
6563
6564	// If this mapping was specified as a warning but the severity was
6565	// upgraded due to diagnostic settings, simulate the current diagnostic
6566	// settings (and use a warning).
6567	if (NewMapping.wasUpgradedFromWarning() && !Mapping.isErrorOrFatal()) {
6568	NewMapping.setSeverity(diag::Severity::Warning);
6569	NewMapping.setUpgradedFromWarning(false);
6570	}
6571
6572	Mapping = NewMapping;
6573	}
6574	return NewState;
6575	};
6576
6577	// Read the first state.
6578	DiagState *FirstState;
6579	if (F.Kind == MK_ImplicitModule) {
6580	// Implicitly-built modules are reused with different diagnostic
6581	// settings. Use the initial diagnostic state from Diag to simulate this
6582	// compilation's diagnostic settings.
6583	FirstState = Diag.DiagStatesByLoc.FirstDiagState;
6584	DiagStates.push_back(Elt: FirstState);
6585
6586	// Skip the initial diagnostic state from the serialized module.
6587	assert(Record[1] == 0 &&
6588	"Invalid data, unexpected backref in initial state");
6589	Idx = 3 + Record[2] * 2;
6590	assert(Idx < Record.size() &&
6591	"Invalid data, not enough state change pairs in initial state");
6592	} else if (F.isModule()) {
6593	// For an explicit module, preserve the flags from the module build
6594	// command line (-w, -Weverything, -Werror, ...) along with any explicit
6595	// -Wblah flags.
6596	unsigned Flags = Record[Idx++];
6597	DiagState Initial;
6598	Initial.SuppressSystemWarnings = Flags & 1; Flags >>= 1;
6599	Initial.ErrorsAsFatal = Flags & 1; Flags >>= 1;
6600	Initial.WarningsAsErrors = Flags & 1; Flags >>= 1;
6601	Initial.EnableAllWarnings = Flags & 1; Flags >>= 1;
6602	Initial.IgnoreAllWarnings = Flags & 1; Flags >>= 1;
6603	Initial.ExtBehavior = (diag::Severity)Flags;
6604	FirstState = ReadDiagState(Initial, true);
6605
6606	assert(F.OriginalSourceFileID.isValid());
6607
6608	// Set up the root buffer of the module to start with the initial
6609	// diagnostic state of the module itself, to cover files that contain no
6610	// explicit transitions (for which we did not serialize anything).
6611	Diag.DiagStatesByLoc.Files[F.OriginalSourceFileID]
6612	.StateTransitions.push_back(Elt: {FirstState, 0});
6613	} else {
6614	// For prefix ASTs, start with whatever the user configured on the
6615	// command line.
6616	Idx++; // Skip flags.
6617	FirstState = ReadDiagState(*Diag.DiagStatesByLoc.CurDiagState, false);
6618	}
6619
6620	// Read the state transitions.
6621	unsigned NumLocations = Record[Idx++];
6622	while (NumLocations--) {
6623	assert(Idx < Record.size() &&
6624	"Invalid data, missing pragma diagnostic states");
6625	SourceLocation Loc = ReadSourceLocation(ModuleFile&: F, Raw: Record[Idx++]);
6626	auto IDAndOffset = SourceMgr.getDecomposedLoc(Loc);
6627	assert(IDAndOffset.first.isValid() && "invalid FileID for transition");
6628	assert(IDAndOffset.second == 0 && "not a start location for a FileID");
6629	unsigned Transitions = Record[Idx++];
6630
6631	// Note that we don't need to set up Parent/ParentOffset here, because
6632	// we won't be changing the diagnostic state within imported FileIDs
6633	// (other than perhaps appending to the main source file, which has no
6634	// parent).
6635	auto &F = Diag.DiagStatesByLoc.Files[IDAndOffset.first];
6636	F.StateTransitions.reserve(N: F.StateTransitions.size() + Transitions);
6637	for (unsigned I = 0; I != Transitions; ++I) {
6638	unsigned Offset = Record[Idx++];
6639	auto *State = ReadDiagState(*FirstState, false);
6640	F.StateTransitions.push_back(Elt: {State, Offset});
6641	}
6642	}
6643
6644	// Read the final state.
6645	assert(Idx < Record.size() &&
6646	"Invalid data, missing final pragma diagnostic state");
6647	SourceLocation CurStateLoc = ReadSourceLocation(ModuleFile&: F, Raw: Record[Idx++]);
6648	auto *CurState = ReadDiagState(*FirstState, false);
6649
6650	if (!F.isModule()) {
6651	Diag.DiagStatesByLoc.CurDiagState = CurState;
6652	Diag.DiagStatesByLoc.CurDiagStateLoc = CurStateLoc;
6653
6654	// Preserve the property that the imaginary root file describes the
6655	// current state.
6656	FileID NullFile;
6657	auto &T = Diag.DiagStatesByLoc.Files[NullFile].StateTransitions;
6658	if (T.empty())
6659	T.push_back(Elt: {CurState, 0});
6660	else
6661	T[0].State = CurState;
6662	}
6663
6664	// Don't try to read these mappings again.
6665	Record.clear();
6666	}
6667	}
6668
6669	/// Get the correct cursor and offset for loading a type.
6670	ASTReader::RecordLocation ASTReader::TypeCursorForIndex(unsigned Index) {
6671	GlobalTypeMapType::iterator I = GlobalTypeMap.find(K: Index);
6672	assert(I != GlobalTypeMap.end() && "Corrupted global type map");
6673	ModuleFile *M = I->second;
6674	return RecordLocation(
6675	M, M->TypeOffsets[Index - M->BaseTypeIndex].getBitOffset() +
6676	M->DeclsBlockStartOffset);
6677	}
6678
6679	static std::optional<Type::TypeClass> getTypeClassForCode(TypeCode code) {
6680	switch (code) {
6681	#define TYPE_BIT_CODE(CLASS_ID, CODE_ID, CODE_VALUE) \
6682	case TYPE_##CODE_ID: return Type::CLASS_ID;
6683	#include "clang/Serialization/TypeBitCodes.def"
6684	default:
6685	return std::nullopt;
6686	}
6687	}
6688
6689	/// Read and return the type with the given index..
6690	///
6691	/// The index is the type ID, shifted and minus the number of predefs. This
6692	/// routine actually reads the record corresponding to the type at the given
6693	/// location. It is a helper routine for GetType, which deals with reading type
6694	/// IDs.
6695	QualType ASTReader::readTypeRecord(unsigned Index) {
6696	assert(ContextObj && "reading type with no AST context");
6697	ASTContext &Context = *ContextObj;
6698	RecordLocation Loc = TypeCursorForIndex(Index);
6699	BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor;
6700
6701	// Keep track of where we are in the stream, then jump back there
6702	// after reading this type.
6703	SavedStreamPosition SavedPosition(DeclsCursor);
6704
6705	ReadingKindTracker ReadingKind(Read_Type, *this);
6706
6707	// Note that we are loading a type record.
6708	Deserializing AType(this);
6709
6710	if (llvm::Error Err = DeclsCursor.JumpToBit(BitNo: Loc.Offset)) {
6711	Error(Err: std::move(Err));
6712	return QualType();
6713	}
6714	Expected<unsigned> RawCode = DeclsCursor.ReadCode();
6715	if (!RawCode) {
6716	Error(Err: RawCode.takeError());
6717	return QualType();
6718	}
6719
6720	ASTRecordReader Record(*this, *Loc.F);
6721	Expected<unsigned> Code = Record.readRecord(Cursor&: DeclsCursor, AbbrevID: RawCode.get());
6722	if (!Code) {
6723	Error(Err: Code.takeError());
6724	return QualType();
6725	}
6726	if (Code.get() == TYPE_EXT_QUAL) {
6727	QualType baseType = Record.readQualType();
6728	Qualifiers quals = Record.readQualifiers();
6729	return Context.getQualifiedType(T: baseType, Qs: quals);
6730	}
6731
6732	auto maybeClass = getTypeClassForCode(code: (TypeCode) Code.get());
6733	if (!maybeClass) {
6734	Error(Msg: "Unexpected code for type");
6735	return QualType();
6736	}
6737
6738	serialization::AbstractTypeReader<ASTRecordReader> TypeReader(Record);
6739	return TypeReader.read(*maybeClass);
6740	}
6741
6742	namespace clang {
6743
6744	class TypeLocReader : public TypeLocVisitor<TypeLocReader> {
6745	using LocSeq = SourceLocationSequence;
6746
6747	ASTRecordReader &Reader;
6748	LocSeq *Seq;
6749
6750	SourceLocation readSourceLocation() { return Reader.readSourceLocation(Seq); }
6751	SourceRange readSourceRange() { return Reader.readSourceRange(Seq); }
6752
6753	TypeSourceInfo *GetTypeSourceInfo() {
6754	return Reader.readTypeSourceInfo();
6755	}
6756
6757	NestedNameSpecifierLoc ReadNestedNameSpecifierLoc() {
6758	return Reader.readNestedNameSpecifierLoc();
6759	}
6760
6761	Attr *ReadAttr() {
6762	return Reader.readAttr();
6763	}
6764
6765	public:
6766	TypeLocReader(ASTRecordReader &Reader, LocSeq *Seq)
6767	: Reader(Reader), Seq(Seq) {}
6768
6769	// We want compile-time assurance that we've enumerated all of
6770	// these, so unfortunately we have to declare them first, then
6771	// define them out-of-line.
6772	#define ABSTRACT_TYPELOC(CLASS, PARENT)
6773	#define TYPELOC(CLASS, PARENT) \
6774	void Visit##CLASS##TypeLoc(CLASS##TypeLoc TyLoc);
6775	#include "clang/AST/TypeLocNodes.def"
6776
6777	void VisitFunctionTypeLoc(FunctionTypeLoc);
6778	void VisitArrayTypeLoc(ArrayTypeLoc);
6779	};
6780
6781	} // namespace clang
6782
6783	void TypeLocReader::VisitQualifiedTypeLoc(QualifiedTypeLoc TL) {
6784	// nothing to do
6785	}
6786
6787	void TypeLocReader::VisitBuiltinTypeLoc(BuiltinTypeLoc TL) {
6788	TL.setBuiltinLoc(readSourceLocation());
6789	if (TL.needsExtraLocalData()) {
6790	TL.setWrittenTypeSpec(static_cast<DeclSpec::TST>(Reader.readInt()));
6791	TL.setWrittenSignSpec(static_cast<TypeSpecifierSign>(Reader.readInt()));
6792	TL.setWrittenWidthSpec(static_cast<TypeSpecifierWidth>(Reader.readInt()));
6793	TL.setModeAttr(Reader.readInt());
6794	}
6795	}
6796
6797	void TypeLocReader::VisitComplexTypeLoc(ComplexTypeLoc TL) {
6798	TL.setNameLoc(readSourceLocation());
6799	}
6800
6801	void TypeLocReader::VisitPointerTypeLoc(PointerTypeLoc TL) {
6802	TL.setStarLoc(readSourceLocation());
6803	}
6804
6805	void TypeLocReader::VisitDecayedTypeLoc(DecayedTypeLoc TL) {
6806	// nothing to do
6807	}
6808
6809	void TypeLocReader::VisitAdjustedTypeLoc(AdjustedTypeLoc TL) {
6810	// nothing to do
6811	}
6812
6813	void TypeLocReader::VisitMacroQualifiedTypeLoc(MacroQualifiedTypeLoc TL) {
6814	TL.setExpansionLoc(readSourceLocation());
6815	}
6816
6817	void TypeLocReader::VisitBlockPointerTypeLoc(BlockPointerTypeLoc TL) {
6818	TL.setCaretLoc(readSourceLocation());
6819	}
6820
6821	void TypeLocReader::VisitLValueReferenceTypeLoc(LValueReferenceTypeLoc TL) {
6822	TL.setAmpLoc(readSourceLocation());
6823	}
6824
6825	void TypeLocReader::VisitRValueReferenceTypeLoc(RValueReferenceTypeLoc TL) {
6826	TL.setAmpAmpLoc(readSourceLocation());
6827	}
6828
6829	void TypeLocReader::VisitMemberPointerTypeLoc(MemberPointerTypeLoc TL) {
6830	TL.setStarLoc(readSourceLocation());
6831	TL.setClassTInfo(GetTypeSourceInfo());
6832	}
6833
6834	void TypeLocReader::VisitArrayTypeLoc(ArrayTypeLoc TL) {
6835	TL.setLBracketLoc(readSourceLocation());
6836	TL.setRBracketLoc(readSourceLocation());
6837	if (Reader.readBool())
6838	TL.setSizeExpr(Reader.readExpr());
6839	else
6840	TL.setSizeExpr(nullptr);
6841	}
6842
6843	void TypeLocReader::VisitConstantArrayTypeLoc(ConstantArrayTypeLoc TL) {
6844	VisitArrayTypeLoc(TL);
6845	}
6846
6847	void TypeLocReader::VisitIncompleteArrayTypeLoc(IncompleteArrayTypeLoc TL) {
6848	VisitArrayTypeLoc(TL);
6849	}
6850
6851	void TypeLocReader::VisitVariableArrayTypeLoc(VariableArrayTypeLoc TL) {
6852	VisitArrayTypeLoc(TL);
6853	}
6854
6855	void TypeLocReader::VisitDependentSizedArrayTypeLoc(
6856	DependentSizedArrayTypeLoc TL) {
6857	VisitArrayTypeLoc(TL);
6858	}
6859
6860	void TypeLocReader::VisitDependentAddressSpaceTypeLoc(
6861	DependentAddressSpaceTypeLoc TL) {
6862
6863	TL.setAttrNameLoc(readSourceLocation());
6864	TL.setAttrOperandParensRange(readSourceRange());
6865	TL.setAttrExprOperand(Reader.readExpr());
6866	}
6867
6868	void TypeLocReader::VisitDependentSizedExtVectorTypeLoc(
6869	DependentSizedExtVectorTypeLoc TL) {
6870	TL.setNameLoc(readSourceLocation());
6871	}
6872
6873	void TypeLocReader::VisitVectorTypeLoc(VectorTypeLoc TL) {
6874	TL.setNameLoc(readSourceLocation());
6875	}
6876
6877	void TypeLocReader::VisitDependentVectorTypeLoc(
6878	DependentVectorTypeLoc TL) {
6879	TL.setNameLoc(readSourceLocation());
6880	}
6881
6882	void TypeLocReader::VisitExtVectorTypeLoc(ExtVectorTypeLoc TL) {
6883	TL.setNameLoc(readSourceLocation());
6884	}
6885
6886	void TypeLocReader::VisitConstantMatrixTypeLoc(ConstantMatrixTypeLoc TL) {
6887	TL.setAttrNameLoc(readSourceLocation());
6888	TL.setAttrOperandParensRange(readSourceRange());
6889	TL.setAttrRowOperand(Reader.readExpr());
6890	TL.setAttrColumnOperand(Reader.readExpr());
6891	}
6892
6893	void TypeLocReader::VisitDependentSizedMatrixTypeLoc(
6894	DependentSizedMatrixTypeLoc TL) {
6895	TL.setAttrNameLoc(readSourceLocation());
6896	TL.setAttrOperandParensRange(readSourceRange());
6897	TL.setAttrRowOperand(Reader.readExpr());
6898	TL.setAttrColumnOperand(Reader.readExpr());
6899	}
6900
6901	void TypeLocReader::VisitFunctionTypeLoc(FunctionTypeLoc TL) {
6902	TL.setLocalRangeBegin(readSourceLocation());
6903	TL.setLParenLoc(readSourceLocation());
6904	TL.setRParenLoc(readSourceLocation());
6905	TL.setExceptionSpecRange(readSourceRange());
6906	TL.setLocalRangeEnd(readSourceLocation());
6907	for (unsigned i = 0, e = TL.getNumParams(); i != e; ++i) {
6908	TL.setParam(i, VD: Reader.readDeclAs<ParmVarDecl>());
6909	}
6910	}
6911
6912	void TypeLocReader::VisitFunctionProtoTypeLoc(FunctionProtoTypeLoc TL) {
6913	VisitFunctionTypeLoc(TL);
6914	}
6915
6916	void TypeLocReader::VisitFunctionNoProtoTypeLoc(FunctionNoProtoTypeLoc TL) {
6917	VisitFunctionTypeLoc(TL);
6918	}
6919
6920	void TypeLocReader::VisitUnresolvedUsingTypeLoc(UnresolvedUsingTypeLoc TL) {
6921	TL.setNameLoc(readSourceLocation());
6922	}
6923
6924	void TypeLocReader::VisitUsingTypeLoc(UsingTypeLoc TL) {
6925	TL.setNameLoc(readSourceLocation());
6926	}
6927
6928	void TypeLocReader::VisitTypedefTypeLoc(TypedefTypeLoc TL) {
6929	TL.setNameLoc(readSourceLocation());
6930	}
6931
6932	void TypeLocReader::VisitTypeOfExprTypeLoc(TypeOfExprTypeLoc TL) {
6933	TL.setTypeofLoc(readSourceLocation());
6934	TL.setLParenLoc(readSourceLocation());
6935	TL.setRParenLoc(readSourceLocation());
6936	}
6937
6938	void TypeLocReader::VisitTypeOfTypeLoc(TypeOfTypeLoc TL) {
6939	TL.setTypeofLoc(readSourceLocation());
6940	TL.setLParenLoc(readSourceLocation());
6941	TL.setRParenLoc(readSourceLocation());
6942	TL.setUnmodifiedTInfo(GetTypeSourceInfo());
6943	}
6944
6945	void TypeLocReader::VisitDecltypeTypeLoc(DecltypeTypeLoc TL) {
6946	TL.setDecltypeLoc(readSourceLocation());
6947	TL.setRParenLoc(readSourceLocation());
6948	}
6949
6950	void TypeLocReader::VisitPackIndexingTypeLoc(PackIndexingTypeLoc TL) {
6951	TL.setEllipsisLoc(readSourceLocation());
6952	}
6953
6954	void TypeLocReader::VisitUnaryTransformTypeLoc(UnaryTransformTypeLoc TL) {
6955	TL.setKWLoc(readSourceLocation());
6956	TL.setLParenLoc(readSourceLocation());
6957	TL.setRParenLoc(readSourceLocation());
6958	TL.setUnderlyingTInfo(GetTypeSourceInfo());
6959	}
6960
6961	ConceptReference *ASTRecordReader::readConceptReference() {
6962	auto NNS = readNestedNameSpecifierLoc();
6963	auto TemplateKWLoc = readSourceLocation();
6964	auto ConceptNameLoc = readDeclarationNameInfo();
6965	auto FoundDecl = readDeclAs<NamedDecl>();
6966	auto NamedConcept = readDeclAs<ConceptDecl>();
6967	auto *CR = ConceptReference::Create(
6968	C: getContext(), NNS, TemplateKWLoc, ConceptNameInfo: ConceptNameLoc, FoundDecl, NamedConcept,
6969	ArgsAsWritten: (readBool() ? readASTTemplateArgumentListInfo() : nullptr));
6970	return CR;
6971	}
6972
6973	void TypeLocReader::VisitAutoTypeLoc(AutoTypeLoc TL) {
6974	TL.setNameLoc(readSourceLocation());
6975	if (Reader.readBool())
6976	TL.setConceptReference(Reader.readConceptReference());
6977	if (Reader.readBool())
6978	TL.setRParenLoc(readSourceLocation());
6979	}
6980
6981	void TypeLocReader::VisitDeducedTemplateSpecializationTypeLoc(
6982	DeducedTemplateSpecializationTypeLoc TL) {
6983	TL.setTemplateNameLoc(readSourceLocation());
6984	}
6985
6986	void TypeLocReader::VisitRecordTypeLoc(RecordTypeLoc TL) {
6987	TL.setNameLoc(readSourceLocation());
6988	}
6989
6990	void TypeLocReader::VisitEnumTypeLoc(EnumTypeLoc TL) {
6991	TL.setNameLoc(readSourceLocation());
6992	}
6993
6994	void TypeLocReader::VisitAttributedTypeLoc(AttributedTypeLoc TL) {
6995	TL.setAttr(ReadAttr());
6996	}
6997
6998	void TypeLocReader::VisitBTFTagAttributedTypeLoc(BTFTagAttributedTypeLoc TL) {
6999	// Nothing to do.
7000	}
7001
7002	void TypeLocReader::VisitTemplateTypeParmTypeLoc(TemplateTypeParmTypeLoc TL) {
7003	TL.setNameLoc(readSourceLocation());
7004	}
7005
7006	void TypeLocReader::VisitSubstTemplateTypeParmTypeLoc(
7007	SubstTemplateTypeParmTypeLoc TL) {
7008	TL.setNameLoc(readSourceLocation());
7009	}
7010
7011	void TypeLocReader::VisitSubstTemplateTypeParmPackTypeLoc(
7012	SubstTemplateTypeParmPackTypeLoc TL) {
7013	TL.setNameLoc(readSourceLocation());
7014	}
7015
7016	void TypeLocReader::VisitTemplateSpecializationTypeLoc(
7017	TemplateSpecializationTypeLoc TL) {
7018	TL.setTemplateKeywordLoc(readSourceLocation());
7019	TL.setTemplateNameLoc(readSourceLocation());
7020	TL.setLAngleLoc(readSourceLocation());
7021	TL.setRAngleLoc(readSourceLocation());
7022	for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i)
7023	TL.setArgLocInfo(i,
7024	AI: Reader.readTemplateArgumentLocInfo(
7025	Kind: TL.getTypePtr()->template_arguments()[i].getKind()));
7026	}
7027
7028	void TypeLocReader::VisitParenTypeLoc(ParenTypeLoc TL) {
7029	TL.setLParenLoc(readSourceLocation());
7030	TL.setRParenLoc(readSourceLocation());
7031	}
7032
7033	void TypeLocReader::VisitElaboratedTypeLoc(ElaboratedTypeLoc TL) {
7034	TL.setElaboratedKeywordLoc(readSourceLocation());
7035	TL.setQualifierLoc(ReadNestedNameSpecifierLoc());
7036	}
7037
7038	void TypeLocReader::VisitInjectedClassNameTypeLoc(InjectedClassNameTypeLoc TL) {
7039	TL.setNameLoc(readSourceLocation());
7040	}
7041
7042	void TypeLocReader::VisitDependentNameTypeLoc(DependentNameTypeLoc TL) {
7043	TL.setElaboratedKeywordLoc(readSourceLocation());
7044	TL.setQualifierLoc(ReadNestedNameSpecifierLoc());
7045	TL.setNameLoc(readSourceLocation());
7046	}
7047
7048	void TypeLocReader::VisitDependentTemplateSpecializationTypeLoc(
7049	DependentTemplateSpecializationTypeLoc TL) {
7050	TL.setElaboratedKeywordLoc(readSourceLocation());
7051	TL.setQualifierLoc(ReadNestedNameSpecifierLoc());
7052	TL.setTemplateKeywordLoc(readSourceLocation());
7053	TL.setTemplateNameLoc(readSourceLocation());
7054	TL.setLAngleLoc(readSourceLocation());
7055	TL.setRAngleLoc(readSourceLocation());
7056	for (unsigned I = 0, E = TL.getNumArgs(); I != E; ++I)
7057	TL.setArgLocInfo(i: I,
7058	AI: Reader.readTemplateArgumentLocInfo(
7059	Kind: TL.getTypePtr()->template_arguments()[I].getKind()));
7060	}
7061
7062	void TypeLocReader::VisitPackExpansionTypeLoc(PackExpansionTypeLoc TL) {
7063	TL.setEllipsisLoc(readSourceLocation());
7064	}
7065
7066	void TypeLocReader::VisitObjCInterfaceTypeLoc(ObjCInterfaceTypeLoc TL) {
7067	TL.setNameLoc(readSourceLocation());
7068	TL.setNameEndLoc(readSourceLocation());
7069	}
7070
7071	void TypeLocReader::VisitObjCTypeParamTypeLoc(ObjCTypeParamTypeLoc TL) {
7072	if (TL.getNumProtocols()) {
7073	TL.setProtocolLAngleLoc(readSourceLocation());
7074	TL.setProtocolRAngleLoc(readSourceLocation());
7075	}
7076	for (unsigned i = 0, e = TL.getNumProtocols(); i != e; ++i)
7077	TL.setProtocolLoc(i, Loc: readSourceLocation());
7078	}
7079
7080	void TypeLocReader::VisitObjCObjectTypeLoc(ObjCObjectTypeLoc TL) {
7081	TL.setHasBaseTypeAsWritten(Reader.readBool());
7082	TL.setTypeArgsLAngleLoc(readSourceLocation());
7083	TL.setTypeArgsRAngleLoc(readSourceLocation());
7084	for (unsigned i = 0, e = TL.getNumTypeArgs(); i != e; ++i)
7085	TL.setTypeArgTInfo(i, TInfo: GetTypeSourceInfo());
7086	TL.setProtocolLAngleLoc(readSourceLocation());
7087	TL.setProtocolRAngleLoc(readSourceLocation());
7088	for (unsigned i = 0, e = TL.getNumProtocols(); i != e; ++i)
7089	TL.setProtocolLoc(i, Loc: readSourceLocation());
7090	}
7091
7092	void TypeLocReader::VisitObjCObjectPointerTypeLoc(ObjCObjectPointerTypeLoc TL) {
7093	TL.setStarLoc(readSourceLocation());
7094	}
7095
7096	void TypeLocReader::VisitAtomicTypeLoc(AtomicTypeLoc TL) {
7097	TL.setKWLoc(readSourceLocation());
7098	TL.setLParenLoc(readSourceLocation());
7099	TL.setRParenLoc(readSourceLocation());
7100	}
7101
7102	void TypeLocReader::VisitPipeTypeLoc(PipeTypeLoc TL) {
7103	TL.setKWLoc(readSourceLocation());
7104	}
7105
7106	void TypeLocReader::VisitBitIntTypeLoc(clang::BitIntTypeLoc TL) {
7107	TL.setNameLoc(readSourceLocation());
7108	}
7109	void TypeLocReader::VisitDependentBitIntTypeLoc(
7110	clang::DependentBitIntTypeLoc TL) {
7111	TL.setNameLoc(readSourceLocation());
7112	}
7113
7114	void ASTRecordReader::readTypeLoc(TypeLoc TL, LocSeq *ParentSeq) {
7115	LocSeq::State Seq(ParentSeq);
7116	TypeLocReader TLR(*this, Seq);
7117	for (; !TL.isNull(); TL = TL.getNextTypeLoc())
7118	TLR.Visit(TyLoc: TL);
7119	}
7120
7121	TypeSourceInfo *ASTRecordReader::readTypeSourceInfo() {
7122	QualType InfoTy = readType();
7123	if (InfoTy.isNull())
7124	return nullptr;
7125
7126	TypeSourceInfo *TInfo = getContext().CreateTypeSourceInfo(T: InfoTy);
7127	readTypeLoc(TL: TInfo->getTypeLoc());
7128	return TInfo;
7129	}
7130
7131	QualType ASTReader::GetType(TypeID ID) {
7132	assert(ContextObj && "reading type with no AST context");
7133	ASTContext &Context = *ContextObj;
7134
7135	unsigned FastQuals = ID & Qualifiers::FastMask;
7136	unsigned Index = ID >> Qualifiers::FastWidth;
7137
7138	if (Index < NUM_PREDEF_TYPE_IDS) {
7139	QualType T;
7140	switch ((PredefinedTypeIDs)Index) {
7141	case PREDEF_TYPE_LAST_ID:
7142	// We should never use this one.
7143	llvm_unreachable("Invalid predefined type");
7144	break;
7145	case PREDEF_TYPE_NULL_ID:
7146	return QualType();
7147	case PREDEF_TYPE_VOID_ID:
7148	T = Context.VoidTy;
7149	break;
7150	case PREDEF_TYPE_BOOL_ID:
7151	T = Context.BoolTy;
7152	break;
7153	case PREDEF_TYPE_CHAR_U_ID:
7154	case PREDEF_TYPE_CHAR_S_ID:
7155	// FIXME: Check that the signedness of CharTy is correct!
7156	T = Context.CharTy;
7157	break;
7158	case PREDEF_TYPE_UCHAR_ID:
7159	T = Context.UnsignedCharTy;
7160	break;
7161	case PREDEF_TYPE_USHORT_ID:
7162	T = Context.UnsignedShortTy;
7163	break;
7164	case PREDEF_TYPE_UINT_ID:
7165	T = Context.UnsignedIntTy;
7166	break;
7167	case PREDEF_TYPE_ULONG_ID:
7168	T = Context.UnsignedLongTy;
7169	break;
7170	case PREDEF_TYPE_ULONGLONG_ID:
7171	T = Context.UnsignedLongLongTy;
7172	break;
7173	case PREDEF_TYPE_UINT128_ID:
7174	T = Context.UnsignedInt128Ty;
7175	break;
7176	case PREDEF_TYPE_SCHAR_ID:
7177	T = Context.SignedCharTy;
7178	break;
7179	case PREDEF_TYPE_WCHAR_ID:
7180	T = Context.WCharTy;
7181	break;
7182	case PREDEF_TYPE_SHORT_ID:
7183	T = Context.ShortTy;
7184	break;
7185	case PREDEF_TYPE_INT_ID:
7186	T = Context.IntTy;
7187	break;
7188	case PREDEF_TYPE_LONG_ID:
7189	T = Context.LongTy;
7190	break;
7191	case PREDEF_TYPE_LONGLONG_ID:
7192	T = Context.LongLongTy;
7193	break;
7194	case PREDEF_TYPE_INT128_ID:
7195	T = Context.Int128Ty;
7196	break;
7197	case PREDEF_TYPE_BFLOAT16_ID:
7198	T = Context.BFloat16Ty;
7199	break;
7200	case PREDEF_TYPE_HALF_ID:
7201	T = Context.HalfTy;
7202	break;
7203	case PREDEF_TYPE_FLOAT_ID:
7204	T = Context.FloatTy;
7205	break;
7206	case PREDEF_TYPE_DOUBLE_ID:
7207	T = Context.DoubleTy;
7208	break;
7209	case PREDEF_TYPE_LONGDOUBLE_ID:
7210	T = Context.LongDoubleTy;
7211	break;
7212	case PREDEF_TYPE_SHORT_ACCUM_ID:
7213	T = Context.ShortAccumTy;
7214	break;
7215	case PREDEF_TYPE_ACCUM_ID:
7216	T = Context.AccumTy;
7217	break;
7218	case PREDEF_TYPE_LONG_ACCUM_ID:
7219	T = Context.LongAccumTy;
7220	break;
7221	case PREDEF_TYPE_USHORT_ACCUM_ID:
7222	T = Context.UnsignedShortAccumTy;
7223	break;
7224	case PREDEF_TYPE_UACCUM_ID:
7225	T = Context.UnsignedAccumTy;
7226	break;
7227	case PREDEF_TYPE_ULONG_ACCUM_ID:
7228	T = Context.UnsignedLongAccumTy;
7229	break;
7230	case PREDEF_TYPE_SHORT_FRACT_ID:
7231	T = Context.ShortFractTy;
7232	break;
7233	case PREDEF_TYPE_FRACT_ID:
7234	T = Context.FractTy;
7235	break;
7236	case PREDEF_TYPE_LONG_FRACT_ID:
7237	T = Context.LongFractTy;
7238	break;
7239	case PREDEF_TYPE_USHORT_FRACT_ID:
7240	T = Context.UnsignedShortFractTy;
7241	break;
7242	case PREDEF_TYPE_UFRACT_ID:
7243	T = Context.UnsignedFractTy;
7244	break;
7245	case PREDEF_TYPE_ULONG_FRACT_ID:
7246	T = Context.UnsignedLongFractTy;
7247	break;
7248	case PREDEF_TYPE_SAT_SHORT_ACCUM_ID:
7249	T = Context.SatShortAccumTy;
7250	break;
7251	case PREDEF_TYPE_SAT_ACCUM_ID:
7252	T = Context.SatAccumTy;
7253	break;
7254	case PREDEF_TYPE_SAT_LONG_ACCUM_ID:
7255	T = Context.SatLongAccumTy;
7256	break;
7257	case PREDEF_TYPE_SAT_USHORT_ACCUM_ID:
7258	T = Context.SatUnsignedShortAccumTy;
7259	break;
7260	case PREDEF_TYPE_SAT_UACCUM_ID:
7261	T = Context.SatUnsignedAccumTy;
7262	break;
7263	case PREDEF_TYPE_SAT_ULONG_ACCUM_ID:
7264	T = Context.SatUnsignedLongAccumTy;
7265	break;
7266	case PREDEF_TYPE_SAT_SHORT_FRACT_ID:
7267	T = Context.SatShortFractTy;
7268	break;
7269	case PREDEF_TYPE_SAT_FRACT_ID:
7270	T = Context.SatFractTy;
7271	break;
7272	case PREDEF_TYPE_SAT_LONG_FRACT_ID:
7273	T = Context.SatLongFractTy;
7274	break;
7275	case PREDEF_TYPE_SAT_USHORT_FRACT_ID:
7276	T = Context.SatUnsignedShortFractTy;
7277	break;
7278	case PREDEF_TYPE_SAT_UFRACT_ID:
7279	T = Context.SatUnsignedFractTy;
7280	break;
7281	case PREDEF_TYPE_SAT_ULONG_FRACT_ID:
7282	T = Context.SatUnsignedLongFractTy;
7283	break;
7284	case PREDEF_TYPE_FLOAT16_ID:
7285	T = Context.Float16Ty;
7286	break;
7287	case PREDEF_TYPE_FLOAT128_ID:
7288	T = Context.Float128Ty;
7289	break;
7290	case PREDEF_TYPE_IBM128_ID:
7291	T = Context.Ibm128Ty;
7292	break;
7293	case PREDEF_TYPE_OVERLOAD_ID:
7294	T = Context.OverloadTy;
7295	break;
7296	case PREDEF_TYPE_BOUND_MEMBER:
7297	T = Context.BoundMemberTy;
7298	break;
7299	case PREDEF_TYPE_PSEUDO_OBJECT:
7300	T = Context.PseudoObjectTy;
7301	break;
7302	case PREDEF_TYPE_DEPENDENT_ID:
7303	T = Context.DependentTy;
7304	break;
7305	case PREDEF_TYPE_UNKNOWN_ANY:
7306	T = Context.UnknownAnyTy;
7307	break;
7308	case PREDEF_TYPE_NULLPTR_ID:
7309	T = Context.NullPtrTy;
7310	break;
7311	case PREDEF_TYPE_CHAR8_ID:
7312	T = Context.Char8Ty;
7313	break;
7314	case PREDEF_TYPE_CHAR16_ID:
7315	T = Context.Char16Ty;
7316	break;
7317	case PREDEF_TYPE_CHAR32_ID:
7318	T = Context.Char32Ty;
7319	break;
7320	case PREDEF_TYPE_OBJC_ID:
7321	T = Context.ObjCBuiltinIdTy;
7322	break;
7323	case PREDEF_TYPE_OBJC_CLASS:
7324	T = Context.ObjCBuiltinClassTy;
7325	break;
7326	case PREDEF_TYPE_OBJC_SEL:
7327	T = Context.ObjCBuiltinSelTy;
7328	break;
7329	#define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
7330	case PREDEF_TYPE_##Id##_ID: \
7331	T = Context.SingletonId; \
7332	break;
7333	#include "clang/Basic/OpenCLImageTypes.def"
7334	#define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \
7335	case PREDEF_TYPE_##Id##_ID: \
7336	T = Context.Id##Ty; \
7337	break;
7338	#include "clang/Basic/OpenCLExtensionTypes.def"
7339	case PREDEF_TYPE_SAMPLER_ID:
7340	T = Context.OCLSamplerTy;
7341	break;
7342	case PREDEF_TYPE_EVENT_ID:
7343	T = Context.OCLEventTy;
7344	break;
7345	case PREDEF_TYPE_CLK_EVENT_ID:
7346	T = Context.OCLClkEventTy;
7347	break;
7348	case PREDEF_TYPE_QUEUE_ID:
7349	T = Context.OCLQueueTy;
7350	break;
7351	case PREDEF_TYPE_RESERVE_ID_ID:
7352	T = Context.OCLReserveIDTy;
7353	break;
7354	case PREDEF_TYPE_AUTO_DEDUCT:
7355	T = Context.getAutoDeductType();
7356	break;
7357	case PREDEF_TYPE_AUTO_RREF_DEDUCT:
7358	T = Context.getAutoRRefDeductType();
7359	break;
7360	case PREDEF_TYPE_ARC_UNBRIDGED_CAST:
7361	T = Context.ARCUnbridgedCastTy;
7362	break;
7363	case PREDEF_TYPE_BUILTIN_FN:
7364	T = Context.BuiltinFnTy;
7365	break;
7366	case PREDEF_TYPE_INCOMPLETE_MATRIX_IDX:
7367	T = Context.IncompleteMatrixIdxTy;
7368	break;
7369	case PREDEF_TYPE_OMP_ARRAY_SECTION:
7370	T = Context.OMPArraySectionTy;
7371	break;
7372	case PREDEF_TYPE_OMP_ARRAY_SHAPING:
7373	T = Context.OMPArraySectionTy;
7374	break;
7375	case PREDEF_TYPE_OMP_ITERATOR:
7376	T = Context.OMPIteratorTy;
7377	break;
7378	#define SVE_TYPE(Name, Id, SingletonId) \
7379	case PREDEF_TYPE_##Id##_ID: \
7380	T = Context.SingletonId; \
7381	break;
7382	#include "clang/Basic/AArch64SVEACLETypes.def"
7383	#define PPC_VECTOR_TYPE(Name, Id, Size) \
7384	case PREDEF_TYPE_##Id##_ID: \
7385	T = Context.Id##Ty; \
7386	break;
7387	#include "clang/Basic/PPCTypes.def"
7388	#define RVV_TYPE(Name, Id, SingletonId) \
7389	case PREDEF_TYPE_##Id##_ID: \
7390	T = Context.SingletonId; \
7391	break;
7392	#include "clang/Basic/RISCVVTypes.def"
7393	#define WASM_TYPE(Name, Id, SingletonId) \
7394	case PREDEF_TYPE_##Id##_ID: \
7395	T = Context.SingletonId; \
7396	break;
7397	#include "clang/Basic/WebAssemblyReferenceTypes.def"
7398	}
7399
7400	assert(!T.isNull() && "Unknown predefined type");
7401	return T.withFastQualifiers(TQs: FastQuals);
7402	}
7403
7404	Index -= NUM_PREDEF_TYPE_IDS;
7405	assert(Index < TypesLoaded.size() && "Type index out-of-range");
7406	if (TypesLoaded[Index].isNull()) {
7407	TypesLoaded[Index] = readTypeRecord(Index);
7408	if (TypesLoaded[Index].isNull())
7409	return QualType();
7410
7411	TypesLoaded[Index]->setFromAST();
7412	if (DeserializationListener)
7413	DeserializationListener->TypeRead(Idx: TypeIdx::fromTypeID(ID),
7414	T: TypesLoaded[Index]);
7415	}
7416
7417	return TypesLoaded[Index].withFastQualifiers(TQs: FastQuals);
7418	}
7419
7420	QualType ASTReader::getLocalType(ModuleFile &F, unsigned LocalID) {
7421	return GetType(ID: getGlobalTypeID(F, LocalID));
7422	}
7423
7424	serialization::TypeID
7425	ASTReader::getGlobalTypeID(ModuleFile &F, unsigned LocalID) const {
7426	unsigned FastQuals = LocalID & Qualifiers::FastMask;
7427	unsigned LocalIndex = LocalID >> Qualifiers::FastWidth;
7428
7429	if (LocalIndex < NUM_PREDEF_TYPE_IDS)
7430	return LocalID;
7431
7432	if (!F.ModuleOffsetMap.empty())
7433	ReadModuleOffsetMap(F);
7434
7435	ContinuousRangeMap<uint32_t, int, 2>::iterator I
7436	= F.TypeRemap.find(K: LocalIndex - NUM_PREDEF_TYPE_IDS);
7437	assert(I != F.TypeRemap.end() && "Invalid index into type index remap");
7438
7439	unsigned GlobalIndex = LocalIndex + I->second;
7440	return (GlobalIndex << Qualifiers::FastWidth) | FastQuals;
7441	}
7442
7443	TemplateArgumentLocInfo
7444	ASTRecordReader::readTemplateArgumentLocInfo(TemplateArgument::ArgKind Kind) {
7445	switch (Kind) {
7446	case TemplateArgument::Expression:
7447	return readExpr();
7448	case TemplateArgument::Type:
7449	return readTypeSourceInfo();
7450	case TemplateArgument::Template: {
7451	NestedNameSpecifierLoc QualifierLoc =
7452	readNestedNameSpecifierLoc();
7453	SourceLocation TemplateNameLoc = readSourceLocation();
7454	return TemplateArgumentLocInfo(getASTContext(), QualifierLoc,
7455	TemplateNameLoc, SourceLocation());
7456	}
7457	case TemplateArgument::TemplateExpansion: {
7458	NestedNameSpecifierLoc QualifierLoc = readNestedNameSpecifierLoc();
7459	SourceLocation TemplateNameLoc = readSourceLocation();
7460	SourceLocation EllipsisLoc = readSourceLocation();
7461	return TemplateArgumentLocInfo(getASTContext(), QualifierLoc,
7462	TemplateNameLoc, EllipsisLoc);
7463	}
7464	case TemplateArgument::Null:
7465	case TemplateArgument::Integral:
7466	case TemplateArgument::Declaration:
7467	case TemplateArgument::NullPtr:
7468	case TemplateArgument::StructuralValue:
7469	case TemplateArgument::Pack:
7470	// FIXME: Is this right?
7471	return TemplateArgumentLocInfo();
7472	}
7473	llvm_unreachable("unexpected template argument loc");
7474	}
7475
7476	TemplateArgumentLoc ASTRecordReader::readTemplateArgumentLoc() {
7477	TemplateArgument Arg = readTemplateArgument();
7478
7479	if (Arg.getKind() == TemplateArgument::Expression) {
7480	if (readBool()) // bool InfoHasSameExpr.
7481	return TemplateArgumentLoc(Arg, TemplateArgumentLocInfo(Arg.getAsExpr()));
7482	}
7483	return TemplateArgumentLoc(Arg, readTemplateArgumentLocInfo(Kind: Arg.getKind()));
7484	}
7485
7486	void ASTRecordReader::readTemplateArgumentListInfo(
7487	TemplateArgumentListInfo &Result) {
7488	Result.setLAngleLoc(readSourceLocation());
7489	Result.setRAngleLoc(readSourceLocation());
7490	unsigned NumArgsAsWritten = readInt();
7491	for (unsigned i = 0; i != NumArgsAsWritten; ++i)
7492	Result.addArgument(Loc: readTemplateArgumentLoc());
7493	}
7494
7495	const ASTTemplateArgumentListInfo *
7496	ASTRecordReader::readASTTemplateArgumentListInfo() {
7497	TemplateArgumentListInfo Result;
7498	readTemplateArgumentListInfo(Result);
7499	return ASTTemplateArgumentListInfo::Create(C: getContext(), List: Result);
7500	}
7501
7502	Decl *ASTReader::GetExternalDecl(uint32_t ID) {
7503	return GetDecl(ID);
7504	}
7505
7506	void ASTReader::CompleteRedeclChain(const Decl *D) {
7507	if (NumCurrentElementsDeserializing) {
7508	// We arrange to not care about the complete redeclaration chain while we're
7509	// deserializing. Just remember that the AST has marked this one as complete
7510	// but that it's not actually complete yet, so we know we still need to
7511	// complete it later.
7512	PendingIncompleteDeclChains.push_back(Elt: const_cast<Decl*>(D));
7513	return;
7514	}
7515
7516	if (!D->getDeclContext()) {
7517	assert(isa<TranslationUnitDecl>(D) && "Not a TU?");
7518	return;
7519	}
7520
7521	const DeclContext *DC = D->getDeclContext()->getRedeclContext();
7522
7523	// If this is a named declaration, complete it by looking it up
7524	// within its context.
7525	//
7526	// FIXME: Merging a function definition should merge
7527	// all mergeable entities within it.
7528	if (isa<TranslationUnitDecl, NamespaceDecl, RecordDecl, EnumDecl>(Val: DC)) {
7529	if (DeclarationName Name = cast<NamedDecl>(Val: D)->getDeclName()) {
7530	if (!getContext().getLangOpts().CPlusPlus &&
7531	isa<TranslationUnitDecl>(Val: DC)) {
7532	// Outside of C++, we don't have a lookup table for the TU, so update
7533	// the identifier instead. (For C++ modules, we don't store decls
7534	// in the serialized identifier table, so we do the lookup in the TU.)
7535	auto *II = Name.getAsIdentifierInfo();
7536	assert(II && "non-identifier name in C?");
7537	if (II->isOutOfDate())
7538	updateOutOfDateIdentifier(II&: *II);
7539	} else
7540	DC->lookup(Name);
7541	} else if (needsAnonymousDeclarationNumber(D: cast<NamedDecl>(Val: D))) {
7542	// Find all declarations of this kind from the relevant context.
7543	for (auto *DCDecl : cast<Decl>(Val: D->getLexicalDeclContext())->redecls()) {
7544	auto *DC = cast<DeclContext>(Val: DCDecl);
7545	SmallVector<Decl*, 8> Decls;
7546	FindExternalLexicalDecls(
7547	DC, IsKindWeWant: [&](Decl::Kind K) { return K == D->getKind(); }, Decls);
7548	}
7549	}
7550	}
7551
7552	if (auto *CTSD = dyn_cast<ClassTemplateSpecializationDecl>(Val: D))
7553	CTSD->getSpecializedTemplate()->LoadLazySpecializations();
7554	if (auto *VTSD = dyn_cast<VarTemplateSpecializationDecl>(Val: D))
7555	VTSD->getSpecializedTemplate()->LoadLazySpecializations();
7556	if (auto *FD = dyn_cast<FunctionDecl>(Val: D)) {
7557	if (auto *Template = FD->getPrimaryTemplate())
7558	Template->LoadLazySpecializations();
7559	}
7560	}
7561
7562	CXXCtorInitializer **
7563	ASTReader::GetExternalCXXCtorInitializers(uint64_t Offset) {
7564	RecordLocation Loc = getLocalBitOffset(GlobalOffset: Offset);
7565	BitstreamCursor &Cursor = Loc.F->DeclsCursor;
7566	SavedStreamPosition SavedPosition(Cursor);
7567	if (llvm::Error Err = Cursor.JumpToBit(BitNo: Loc.Offset)) {
7568	Error(Err: std::move(Err));
7569	return nullptr;
7570	}
7571	ReadingKindTracker ReadingKind(Read_Decl, *this);
7572	Deserializing D(this);
7573
7574	Expected<unsigned> MaybeCode = Cursor.ReadCode();
7575	if (!MaybeCode) {
7576	Error(Err: MaybeCode.takeError());
7577	return nullptr;
7578	}
7579	unsigned Code = MaybeCode.get();
7580
7581	ASTRecordReader Record(*this, *Loc.F);
7582	Expected<unsigned> MaybeRecCode = Record.readRecord(Cursor, AbbrevID: Code);
7583	if (!MaybeRecCode) {
7584	Error(Err: MaybeRecCode.takeError());
7585	return nullptr;
7586	}
7587	if (MaybeRecCode.get() != DECL_CXX_CTOR_INITIALIZERS) {
7588	Error(Msg: "malformed AST file: missing C++ ctor initializers");
7589	return nullptr;
7590	}
7591
7592	return Record.readCXXCtorInitializers();
7593	}
7594
7595	CXXBaseSpecifier *ASTReader::GetExternalCXXBaseSpecifiers(uint64_t Offset) {
7596	assert(ContextObj && "reading base specifiers with no AST context");
7597	ASTContext &Context = *ContextObj;
7598
7599	RecordLocation Loc = getLocalBitOffset(GlobalOffset: Offset);
7600	BitstreamCursor &Cursor = Loc.F->DeclsCursor;
7601	SavedStreamPosition SavedPosition(Cursor);
7602	if (llvm::Error Err = Cursor.JumpToBit(BitNo: Loc.Offset)) {
7603	Error(Err: std::move(Err));
7604	return nullptr;
7605	}
7606	ReadingKindTracker ReadingKind(Read_Decl, *this);
7607	Deserializing D(this);
7608
7609	Expected<unsigned> MaybeCode = Cursor.ReadCode();
7610	if (!MaybeCode) {
7611	Error(Err: MaybeCode.takeError());
7612	return nullptr;
7613	}
7614	unsigned Code = MaybeCode.get();
7615
7616	ASTRecordReader Record(*this, *Loc.F);
7617	Expected<unsigned> MaybeRecCode = Record.readRecord(Cursor, AbbrevID: Code);
7618	if (!MaybeRecCode) {
7619	Error(Err: MaybeCode.takeError());
7620	return nullptr;
7621	}
7622	unsigned RecCode = MaybeRecCode.get();
7623
7624	if (RecCode != DECL_CXX_BASE_SPECIFIERS) {
7625	Error(Msg: "malformed AST file: missing C++ base specifiers");
7626	return nullptr;
7627	}
7628
7629	unsigned NumBases = Record.readInt();
7630	void *Mem = Context.Allocate(Size: sizeof(CXXBaseSpecifier) * NumBases);
7631	CXXBaseSpecifier *Bases = new (Mem) CXXBaseSpecifier [NumBases];
7632	for (unsigned I = 0; I != NumBases; ++I)
7633	Bases[I] = Record.readCXXBaseSpecifier();
7634	return Bases;
7635	}
7636
7637	serialization::DeclID
7638	ASTReader::getGlobalDeclID(ModuleFile &F, LocalDeclID LocalID) const {
7639	if (LocalID < NUM_PREDEF_DECL_IDS)
7640	return LocalID;
7641
7642	if (!F.ModuleOffsetMap.empty())
7643	ReadModuleOffsetMap(F);
7644
7645	ContinuousRangeMap<uint32_t, int, 2>::iterator I
7646	= F.DeclRemap.find(K: LocalID - NUM_PREDEF_DECL_IDS);
7647	assert(I != F.DeclRemap.end() && "Invalid index into decl index remap");
7648
7649	return LocalID + I->second;
7650	}
7651
7652	bool ASTReader::isDeclIDFromModule(serialization::GlobalDeclID ID,
7653	ModuleFile &M) const {
7654	// Predefined decls aren't from any module.
7655	if (ID < NUM_PREDEF_DECL_IDS)
7656	return false;
7657
7658	return ID - NUM_PREDEF_DECL_IDS >= M.BaseDeclID &&
7659	ID - NUM_PREDEF_DECL_IDS < M.BaseDeclID + M.LocalNumDecls;
7660	}
7661
7662	ModuleFile *ASTReader::getOwningModuleFile(const Decl *D) {
7663	if (!D->isFromASTFile())
7664	return nullptr;
7665	GlobalDeclMapType::const_iterator I = GlobalDeclMap.find(K: D->getGlobalID());
7666	assert(I != GlobalDeclMap.end() && "Corrupted global declaration map");
7667	return I->second;
7668	}
7669
7670	SourceLocation ASTReader::getSourceLocationForDeclID(GlobalDeclID ID) {
7671	if (ID < NUM_PREDEF_DECL_IDS)
7672	return SourceLocation();
7673
7674	unsigned Index = ID - NUM_PREDEF_DECL_IDS;
7675
7676	if (Index > DeclsLoaded.size()) {
7677	Error(Msg: "declaration ID out-of-range for AST file");
7678	return SourceLocation();
7679	}
7680
7681	if (Decl *D = DeclsLoaded[Index])
7682	return D->getLocation();
7683
7684	SourceLocation Loc;
7685	DeclCursorForID(ID, Location&: Loc);
7686	return Loc;
7687	}
7688
7689	static Decl *getPredefinedDecl(ASTContext &Context, PredefinedDeclIDs ID) {
7690	switch (ID) {
7691	case PREDEF_DECL_NULL_ID:
7692	return nullptr;
7693
7694	case PREDEF_DECL_TRANSLATION_UNIT_ID:
7695	return Context.getTranslationUnitDecl();
7696
7697	case PREDEF_DECL_OBJC_ID_ID:
7698	return Context.getObjCIdDecl();
7699
7700	case PREDEF_DECL_OBJC_SEL_ID:
7701	return Context.getObjCSelDecl();
7702
7703	case PREDEF_DECL_OBJC_CLASS_ID:
7704	return Context.getObjCClassDecl();
7705
7706	case PREDEF_DECL_OBJC_PROTOCOL_ID:
7707	return Context.getObjCProtocolDecl();
7708
7709	case PREDEF_DECL_INT_128_ID:
7710	return Context.getInt128Decl();
7711
7712	case PREDEF_DECL_UNSIGNED_INT_128_ID:
7713	return Context.getUInt128Decl();
7714
7715	case PREDEF_DECL_OBJC_INSTANCETYPE_ID:
7716	return Context.getObjCInstanceTypeDecl();
7717
7718	case PREDEF_DECL_BUILTIN_VA_LIST_ID:
7719	return Context.getBuiltinVaListDecl();
7720
7721	case PREDEF_DECL_VA_LIST_TAG:
7722	return Context.getVaListTagDecl();
7723
7724	case PREDEF_DECL_BUILTIN_MS_VA_LIST_ID:
7725	return Context.getBuiltinMSVaListDecl();
7726
7727	case PREDEF_DECL_BUILTIN_MS_GUID_ID:
7728	return Context.getMSGuidTagDecl();
7729
7730	case PREDEF_DECL_EXTERN_C_CONTEXT_ID:
7731	return Context.getExternCContextDecl();
7732
7733	case PREDEF_DECL_MAKE_INTEGER_SEQ_ID:
7734	return Context.getMakeIntegerSeqDecl();
7735
7736	case PREDEF_DECL_CF_CONSTANT_STRING_ID:
7737	return Context.getCFConstantStringDecl();
7738
7739	case PREDEF_DECL_CF_CONSTANT_STRING_TAG_ID:
7740	return Context.getCFConstantStringTagDecl();
7741
7742	case PREDEF_DECL_TYPE_PACK_ELEMENT_ID:
7743	return Context.getTypePackElementDecl();
7744	}
7745	llvm_unreachable("PredefinedDeclIDs unknown enum value");
7746	}
7747
7748	Decl *ASTReader::GetExistingDecl(DeclID ID) {
7749	assert(ContextObj && "reading decl with no AST context");
7750	if (ID < NUM_PREDEF_DECL_IDS) {
7751	Decl *D = getPredefinedDecl(Context&: *ContextObj, ID: (PredefinedDeclIDs)ID);
7752	if (D) {
7753	// Track that we have merged the declaration with ID \p ID into the
7754	// pre-existing predefined declaration \p D.
7755	auto &Merged = KeyDecls[D->getCanonicalDecl()];
7756	if (Merged.empty())
7757	Merged.push_back(Elt: ID);
7758	}
7759	return D;
7760	}
7761
7762	unsigned Index = ID - NUM_PREDEF_DECL_IDS;
7763
7764	if (Index >= DeclsLoaded.size()) {
7765	assert(0 && "declaration ID out-of-range for AST file");
7766	Error(Msg: "declaration ID out-of-range for AST file");
7767	return nullptr;
7768	}
7769
7770	return DeclsLoaded[Index];
7771	}
7772
7773	Decl *ASTReader::GetDecl(DeclID ID) {
7774	if (ID < NUM_PREDEF_DECL_IDS)
7775	return GetExistingDecl(ID);
7776
7777	unsigned Index = ID - NUM_PREDEF_DECL_IDS;
7778
7779	if (Index >= DeclsLoaded.size()) {
7780	assert(0 && "declaration ID out-of-range for AST file");
7781	Error(Msg: "declaration ID out-of-range for AST file");
7782	return nullptr;
7783	}
7784
7785	if (!DeclsLoaded[Index]) {
7786	ReadDeclRecord(ID);
7787	if (DeserializationListener)
7788	DeserializationListener->DeclRead(ID, D: DeclsLoaded[Index]);
7789	}
7790
7791	return DeclsLoaded[Index];
7792	}
7793
7794	DeclID ASTReader::mapGlobalIDToModuleFileGlobalID(ModuleFile &M,
7795	DeclID GlobalID) {
7796	if (GlobalID < NUM_PREDEF_DECL_IDS)
7797	return GlobalID;
7798
7799	GlobalDeclMapType::const_iterator I = GlobalDeclMap.find(K: GlobalID);
7800	assert(I != GlobalDeclMap.end() && "Corrupted global declaration map");
7801	ModuleFile *Owner = I->second;
7802
7803	llvm::DenseMap<ModuleFile *, serialization::DeclID>::iterator Pos
7804	= M.GlobalToLocalDeclIDs.find(Val: Owner);
7805	if (Pos == M.GlobalToLocalDeclIDs.end())
7806	return 0;
7807
7808	return GlobalID - Owner->BaseDeclID + Pos->second;
7809	}
7810
7811	serialization::DeclID ASTReader::ReadDeclID(ModuleFile &F,
7812	const RecordData &Record,
7813	unsigned &Idx) {
7814	if (Idx >= Record.size()) {
7815	Error(Msg: "Corrupted AST file");
7816	return 0;
7817	}
7818
7819	return getGlobalDeclID(F, LocalID: Record[Idx++]);
7820	}
7821
7822	/// Resolve the offset of a statement into a statement.
7823	///
7824	/// This operation will read a new statement from the external
7825	/// source each time it is called, and is meant to be used via a
7826	/// LazyOffsetPtr (which is used by Decls for the body of functions, etc).
7827	Stmt *ASTReader::GetExternalDeclStmt(uint64_t Offset) {
7828	// Switch case IDs are per Decl.
7829	ClearSwitchCaseIDs();
7830
7831	// Offset here is a global offset across the entire chain.
7832	RecordLocation Loc = getLocalBitOffset(GlobalOffset: Offset);
7833	if (llvm::Error Err = Loc.F->DeclsCursor.JumpToBit(BitNo: Loc.Offset)) {
7834	Error(Err: std::move(Err));
7835	return nullptr;
7836	}
7837	assert(NumCurrentElementsDeserializing == 0 &&
7838	"should not be called while already deserializing");
7839	Deserializing D(this);
7840	return ReadStmtFromStream(F&: *Loc.F);
7841	}
7842
7843	void ASTReader::FindExternalLexicalDecls(
7844	const DeclContext *DC, llvm::function_ref<bool(Decl::Kind)> IsKindWeWant,
7845	SmallVectorImpl<Decl *> &Decls) {
7846	bool PredefsVisited[NUM_PREDEF_DECL_IDS] = {};
7847
7848	auto Visit = [&] (ModuleFile *M, LexicalContents LexicalDecls) {
7849	assert(LexicalDecls.size() % 2 == 0 && "expected an even number of entries");
7850	for (int I = 0, N = LexicalDecls.size(); I != N; I += 2) {
7851	auto K = (Decl::Kind)+LexicalDecls[I];
7852	if (!IsKindWeWant(K))
7853	continue;
7854
7855	auto ID = (serialization::DeclID)+LexicalDecls[I + 1];
7856
7857	// Don't add predefined declarations to the lexical context more
7858	// than once.
7859	if (ID < NUM_PREDEF_DECL_IDS) {
7860	if (PredefsVisited[ID])
7861	continue;
7862
7863	PredefsVisited[ID] = true;
7864	}
7865
7866	if (Decl *D = GetLocalDecl(F&: *M, LocalID: ID)) {
7867	assert(D->getKind() == K && "wrong kind for lexical decl");
7868	if (!DC->isDeclInLexicalTraversal(D))
7869	Decls.push_back(Elt: D);
7870	}
7871	}
7872	};
7873
7874	if (isa<TranslationUnitDecl>(Val: DC)) {
7875	for (const auto &Lexical : TULexicalDecls)
7876	Visit(Lexical.first, Lexical.second);
7877	} else {
7878	auto I = LexicalDecls.find(Val: DC);
7879	if (I != LexicalDecls.end())
7880	Visit(I->second.first, I->second.second);
7881	}
7882
7883	++NumLexicalDeclContextsRead;
7884	}
7885
7886	namespace {
7887
7888	class DeclIDComp {
7889	ASTReader &Reader;
7890	ModuleFile &Mod;
7891
7892	public:
7893	DeclIDComp(ASTReader &Reader, ModuleFile &M) : Reader(Reader), Mod(M) {}
7894
7895	bool operator()(LocalDeclID L, LocalDeclID R) const {
7896	SourceLocation LHS = getLocation(ID: L);
7897	SourceLocation RHS = getLocation(ID: R);
7898	return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
7899	}
7900
7901	bool operator()(SourceLocation LHS, LocalDeclID R) const {
7902	SourceLocation RHS = getLocation(ID: R);
7903	return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
7904	}
7905
7906	bool operator()(LocalDeclID L, SourceLocation RHS) const {
7907	SourceLocation LHS = getLocation(ID: L);
7908	return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
7909	}
7910
7911	SourceLocation getLocation(LocalDeclID ID) const {
7912	return Reader.getSourceManager().getFileLoc(
7913	Loc: Reader.getSourceLocationForDeclID(ID: Reader.getGlobalDeclID(F&: Mod, LocalID: ID)));
7914	}
7915	};
7916
7917	} // namespace
7918
7919	void ASTReader::FindFileRegionDecls(FileID File,
7920	unsigned Offset, unsigned Length,
7921	SmallVectorImpl<Decl *> &Decls) {
7922	SourceManager &SM = getSourceManager();
7923
7924	llvm::DenseMap<FileID, FileDeclsInfo>::iterator I = FileDeclIDs.find(Val: File);
7925	if (I == FileDeclIDs.end())
7926	return;
7927
7928	FileDeclsInfo &DInfo = I->second;
7929	if (DInfo.Decls.empty())
7930	return;
7931
7932	SourceLocation
7933	BeginLoc = SM.getLocForStartOfFile(FID: File).getLocWithOffset(Offset);
7934	SourceLocation EndLoc = BeginLoc.getLocWithOffset(Offset: Length);
7935
7936	DeclIDComp DIDComp(*this, *DInfo.Mod);
7937	ArrayRef<serialization::LocalDeclID>::iterator BeginIt =
7938	llvm::lower_bound(Range&: DInfo.Decls, Value&: BeginLoc, C: DIDComp);
7939	if (BeginIt != DInfo.Decls.begin())
7940	--BeginIt;
7941
7942	// If we are pointing at a top-level decl inside an objc container, we need
7943	// to backtrack until we find it otherwise we will fail to report that the
7944	// region overlaps with an objc container.
7945	while (BeginIt != DInfo.Decls.begin() &&
7946	GetDecl(ID: getGlobalDeclID(F&: *DInfo.Mod, LocalID: *BeginIt))
7947	->isTopLevelDeclInObjCContainer())
7948	--BeginIt;
7949
7950	ArrayRef<serialization::LocalDeclID>::iterator EndIt =
7951	llvm::upper_bound(Range&: DInfo.Decls, Value&: EndLoc, C: DIDComp);
7952	if (EndIt != DInfo.Decls.end())
7953	++EndIt;
7954
7955	for (ArrayRef<serialization::LocalDeclID>::iterator
7956	DIt = BeginIt; DIt != EndIt; ++DIt)
7957	Decls.push_back(Elt: GetDecl(ID: getGlobalDeclID(F&: *DInfo.Mod, LocalID: *DIt)));
7958	}
7959
7960	bool
7961	ASTReader::FindExternalVisibleDeclsByName(const DeclContext *DC,
7962	DeclarationName Name) {
7963	assert(DC->hasExternalVisibleStorage() && DC == DC->getPrimaryContext() &&
7964	"DeclContext has no visible decls in storage");
7965	if (!Name)
7966	return false;
7967
7968	auto It = Lookups.find(Val: DC);
7969	if (It == Lookups.end())
7970	return false;
7971
7972	Deserializing LookupResults(this);
7973
7974	// Load the list of declarations.
7975	SmallVector<NamedDecl *, 64> Decls;
7976	llvm::SmallPtrSet<NamedDecl *, 8> Found;
7977	for (DeclID ID : It->second.Table.find(EKey: Name)) {
7978	NamedDecl *ND = cast<NamedDecl>(Val: GetDecl(ID));
7979	if (ND->getDeclName() == Name && Found.insert(Ptr: ND).second)
7980	Decls.push_back(Elt: ND);
7981	}
7982
7983	++NumVisibleDeclContextsRead;
7984	SetExternalVisibleDeclsForName(DC, Name, Decls);
7985	return !Decls.empty();
7986	}
7987
7988	void ASTReader::completeVisibleDeclsMap(const DeclContext *DC) {
7989	if (!DC->hasExternalVisibleStorage())
7990	return;
7991
7992	auto It = Lookups.find(Val: DC);
7993	assert(It != Lookups.end() &&
7994	"have external visible storage but no lookup tables");
7995
7996	DeclsMap Decls;
7997
7998	for (DeclID ID : It->second.Table.findAll()) {
7999	NamedDecl *ND = cast<NamedDecl>(Val: GetDecl(ID));
8000	Decls[ND->getDeclName()].push_back(Elt: ND);
8001	}
8002
8003	++NumVisibleDeclContextsRead;
8004
8005	for (DeclsMap::iterator I = Decls.begin(), E = Decls.end(); I != E; ++I) {
8006	SetExternalVisibleDeclsForName(DC, Name: I->first, Decls: I->second);
8007	}
8008	const_cast<DeclContext *>(DC)->setHasExternalVisibleStorage(false);
8009	}
8010
8011	const serialization::reader::DeclContextLookupTable *
8012	ASTReader::getLoadedLookupTables(DeclContext *Primary) const {
8013	auto I = Lookups.find(Val: Primary);
8014	return I == Lookups.end() ? nullptr : &I->second;
8015	}
8016
8017	/// Under non-PCH compilation the consumer receives the objc methods
8018	/// before receiving the implementation, and codegen depends on this.
8019	/// We simulate this by deserializing and passing to consumer the methods of the
8020	/// implementation before passing the deserialized implementation decl.
8021	static void PassObjCImplDeclToConsumer(ObjCImplDecl *ImplD,
8022	ASTConsumer *Consumer) {
8023	assert(ImplD && Consumer);
8024
8025	for (auto *I : ImplD->methods())
8026	Consumer->HandleInterestingDecl(DeclGroupRef(I));
8027
8028	Consumer->HandleInterestingDecl(D: DeclGroupRef(ImplD));
8029	}
8030
8031	void ASTReader::PassInterestingDeclToConsumer(Decl *D) {
8032	if (ObjCImplDecl *ImplD = dyn_cast<ObjCImplDecl>(Val: D))
8033	PassObjCImplDeclToConsumer(ImplD, Consumer);
8034	else
8035	Consumer->HandleInterestingDecl(D: DeclGroupRef(D));
8036	}
8037
8038	void ASTReader::StartTranslationUnit(ASTConsumer *Consumer) {
8039	this->Consumer = Consumer;
8040
8041	if (Consumer)
8042	PassInterestingDeclsToConsumer();
8043
8044	if (DeserializationListener)
8045	DeserializationListener->ReaderInitialized(Reader: this);
8046	}
8047
8048	void ASTReader::PrintStats() {
8049	std::fprintf(stderr, format: "*** AST File Statistics:\n");
8050
8051	unsigned NumTypesLoaded =
8052	TypesLoaded.size() - llvm::count(Range: TypesLoaded.materialized(), Element: QualType());
8053	unsigned NumDeclsLoaded =
8054	DeclsLoaded.size() -
8055	llvm::count(Range: DeclsLoaded.materialized(), Element: (Decl *)nullptr);
8056	unsigned NumIdentifiersLoaded =
8057	IdentifiersLoaded.size() -
8058	llvm::count(Range&: IdentifiersLoaded, Element: (IdentifierInfo *)nullptr);
8059	unsigned NumMacrosLoaded =
8060	MacrosLoaded.size() - llvm::count(Range&: MacrosLoaded, Element: (MacroInfo *)nullptr);
8061	unsigned NumSelectorsLoaded =
8062	SelectorsLoaded.size() - llvm::count(Range&: SelectorsLoaded, Element: Selector());
8063
8064	if (unsigned TotalNumSLocEntries = getTotalNumSLocs())
8065	std::fprintf(stderr, format: " %u/%u source location entries read (%f%%)\n",
8066	NumSLocEntriesRead, TotalNumSLocEntries,
8067	((float)NumSLocEntriesRead/TotalNumSLocEntries * 100));
8068	if (!TypesLoaded.empty())
8069	std::fprintf(stderr, format: " %u/%u types read (%f%%)\n",
8070	NumTypesLoaded, (unsigned)TypesLoaded.size(),
8071	((float)NumTypesLoaded/TypesLoaded.size() * 100));
8072	if (!DeclsLoaded.empty())
8073	std::fprintf(stderr, format: " %u/%u declarations read (%f%%)\n",
8074	NumDeclsLoaded, (unsigned)DeclsLoaded.size(),
8075	((float)NumDeclsLoaded/DeclsLoaded.size() * 100));
8076	if (!IdentifiersLoaded.empty())
8077	std::fprintf(stderr, format: " %u/%u identifiers read (%f%%)\n",
8078	NumIdentifiersLoaded, (unsigned)IdentifiersLoaded.size(),
8079	((float)NumIdentifiersLoaded/IdentifiersLoaded.size() * 100));
8080	if (!MacrosLoaded.empty())
8081	std::fprintf(stderr, format: " %u/%u macros read (%f%%)\n",
8082	NumMacrosLoaded, (unsigned)MacrosLoaded.size(),
8083	((float)NumMacrosLoaded/MacrosLoaded.size() * 100));
8084	if (!SelectorsLoaded.empty())
8085	std::fprintf(stderr, format: " %u/%u selectors read (%f%%)\n",
8086	NumSelectorsLoaded, (unsigned)SelectorsLoaded.size(),
8087	((float)NumSelectorsLoaded/SelectorsLoaded.size() * 100));
8088	if (TotalNumStatements)
8089	std::fprintf(stderr, format: " %u/%u statements read (%f%%)\n",
8090	NumStatementsRead, TotalNumStatements,
8091	((float)NumStatementsRead/TotalNumStatements * 100));
8092	if (TotalNumMacros)
8093	std::fprintf(stderr, format: " %u/%u macros read (%f%%)\n",
8094	NumMacrosRead, TotalNumMacros,
8095	((float)NumMacrosRead/TotalNumMacros * 100));
8096	if (TotalLexicalDeclContexts)
8097	std::fprintf(stderr, format: " %u/%u lexical declcontexts read (%f%%)\n",
8098	NumLexicalDeclContextsRead, TotalLexicalDeclContexts,
8099	((float)NumLexicalDeclContextsRead/TotalLexicalDeclContexts
8100	* 100));
8101	if (TotalVisibleDeclContexts)
8102	std::fprintf(stderr, format: " %u/%u visible declcontexts read (%f%%)\n",
8103	NumVisibleDeclContextsRead, TotalVisibleDeclContexts,
8104	((float)NumVisibleDeclContextsRead/TotalVisibleDeclContexts
8105	* 100));
8106	if (TotalNumMethodPoolEntries)
8107	std::fprintf(stderr, format: " %u/%u method pool entries read (%f%%)\n",
8108	NumMethodPoolEntriesRead, TotalNumMethodPoolEntries,
8109	((float)NumMethodPoolEntriesRead/TotalNumMethodPoolEntries
8110	* 100));
8111	if (NumMethodPoolLookups)
8112	std::fprintf(stderr, format: " %u/%u method pool lookups succeeded (%f%%)\n",
8113	NumMethodPoolHits, NumMethodPoolLookups,
8114	((float)NumMethodPoolHits/NumMethodPoolLookups * 100.0));
8115	if (NumMethodPoolTableLookups)
8116	std::fprintf(stderr, format: " %u/%u method pool table lookups succeeded (%f%%)\n",
8117	NumMethodPoolTableHits, NumMethodPoolTableLookups,
8118	((float)NumMethodPoolTableHits/NumMethodPoolTableLookups
8119	* 100.0));
8120	if (NumIdentifierLookupHits)
8121	std::fprintf(stderr,
8122	format: " %u / %u identifier table lookups succeeded (%f%%)\n",
8123	NumIdentifierLookupHits, NumIdentifierLookups,
8124	(double)NumIdentifierLookupHits*100.0/NumIdentifierLookups);
8125
8126	if (GlobalIndex) {
8127	std::fprintf(stderr, format: "\n");
8128	GlobalIndex->printStats();
8129	}
8130
8131	std::fprintf(stderr, format: "\n");
8132	dump();
8133	std::fprintf(stderr, format: "\n");
8134	}
8135
8136	template<typename Key, typename ModuleFile, unsigned InitialCapacity>
8137	LLVM_DUMP_METHOD static void
8138	dumpModuleIDMap(StringRef Name,
8139	const ContinuousRangeMap<Key, ModuleFile *,
8140	InitialCapacity> &Map) {
8141	if (Map.begin() == Map.end())
8142	return;
8143
8144	using MapType = ContinuousRangeMap<Key, ModuleFile *, InitialCapacity>;
8145
8146	llvm::errs() << Name << ":\n";
8147	for (typename MapType::const_iterator I = Map.begin(), IEnd = Map.end();
8148	I != IEnd; ++I) {
8149	llvm::errs() << " " << I->first << " -> " << I->second->FileName
8150	<< "\n";
8151	}
8152	}
8153
8154	LLVM_DUMP_METHOD void ASTReader::dump() {
8155	llvm::errs() << "*** PCH/ModuleFile Remappings:\n";
8156	dumpModuleIDMap(Name: "Global bit offset map", Map: GlobalBitOffsetsMap);
8157	dumpModuleIDMap(Name: "Global source location entry map", Map: GlobalSLocEntryMap);
8158	dumpModuleIDMap(Name: "Global type map", Map: GlobalTypeMap);
8159	dumpModuleIDMap(Name: "Global declaration map", Map: GlobalDeclMap);
8160	dumpModuleIDMap(Name: "Global identifier map", Map: GlobalIdentifierMap);
8161	dumpModuleIDMap(Name: "Global macro map", Map: GlobalMacroMap);
8162	dumpModuleIDMap(Name: "Global submodule map", Map: GlobalSubmoduleMap);
8163	dumpModuleIDMap(Name: "Global selector map", Map: GlobalSelectorMap);
8164	dumpModuleIDMap(Name: "Global preprocessed entity map",
8165	Map: GlobalPreprocessedEntityMap);
8166
8167	llvm::errs() << "\n*** PCH/Modules Loaded:";
8168	for (ModuleFile &M : ModuleMgr)
8169	M.dump();
8170	}
8171
8172	/// Return the amount of memory used by memory buffers, breaking down
8173	/// by heap-backed versus mmap'ed memory.
8174	void ASTReader::getMemoryBufferSizes(MemoryBufferSizes &sizes) const {
8175	for (ModuleFile &I : ModuleMgr) {
8176	if (llvm::MemoryBuffer *buf = I.Buffer) {
8177	size_t bytes = buf->getBufferSize();
8178	switch (buf->getBufferKind()) {
8179	case llvm::MemoryBuffer::MemoryBuffer_Malloc:
8180	sizes.malloc_bytes += bytes;
8181	break;
8182	case llvm::MemoryBuffer::MemoryBuffer_MMap:
8183	sizes.mmap_bytes += bytes;
8184	break;
8185	}
8186	}
8187	}
8188	}
8189
8190	void ASTReader::InitializeSema(Sema &S) {
8191	SemaObj = &S;
8192	S.addExternalSource(E: this);
8193
8194	// Makes sure any declarations that were deserialized "too early"
8195	// still get added to the identifier's declaration chains.
8196	for (uint64_t ID : PreloadedDeclIDs) {
8197	NamedDecl *D = cast<NamedDecl>(Val: GetDecl(ID));
8198	pushExternalDeclIntoScope(D, Name: D->getDeclName());
8199	}
8200	PreloadedDeclIDs.clear();
8201
8202	// FIXME: What happens if these are changed by a module import?
8203	if (!FPPragmaOptions.empty()) {
8204	assert(FPPragmaOptions.size() == 1 && "Wrong number of FP_PRAGMA_OPTIONS");
8205	FPOptionsOverride NewOverrides =
8206	FPOptionsOverride::getFromOpaqueInt(I: FPPragmaOptions[0]);
8207	SemaObj->CurFPFeatures =
8208	NewOverrides.applyOverrides(LO: SemaObj->getLangOpts());
8209	}
8210
8211	SemaObj->OpenCLFeatures = OpenCLExtensions;
8212
8213	UpdateSema();
8214	}
8215
8216	void ASTReader::UpdateSema() {
8217	assert(SemaObj && "no Sema to update");
8218
8219	// Load the offsets of the declarations that Sema references.
8220	// They will be lazily deserialized when needed.
8221	if (!SemaDeclRefs.empty()) {
8222	assert(SemaDeclRefs.size() % 3 == 0);
8223	for (unsigned I = 0; I != SemaDeclRefs.size(); I += 3) {
8224	if (!SemaObj->StdNamespace)
8225	SemaObj->StdNamespace = SemaDeclRefs[I];
8226	if (!SemaObj->StdBadAlloc)
8227	SemaObj->StdBadAlloc = SemaDeclRefs[I+1];
8228	if (!SemaObj->StdAlignValT)
8229	SemaObj->StdAlignValT = SemaDeclRefs[I+2];
8230	}
8231	SemaDeclRefs.clear();
8232	}
8233
8234	// Update the state of pragmas. Use the same API as if we had encountered the
8235	// pragma in the source.
8236	if(OptimizeOffPragmaLocation.isValid())
8237	SemaObj->ActOnPragmaOptimize(/* On = */ false, PragmaLoc: OptimizeOffPragmaLocation);
8238	if (PragmaMSStructState != -1)
8239	SemaObj->ActOnPragmaMSStruct(Kind: (PragmaMSStructKind)PragmaMSStructState);
8240	if (PointersToMembersPragmaLocation.isValid()) {
8241	SemaObj->ActOnPragmaMSPointersToMembers(
8242	Kind: (LangOptions::PragmaMSPointersToMembersKind)
8243	PragmaMSPointersToMembersState,
8244	PragmaLoc: PointersToMembersPragmaLocation);
8245	}
8246	SemaObj->ForceCUDAHostDeviceDepth = ForceCUDAHostDeviceDepth;
8247
8248	if (PragmaAlignPackCurrentValue) {
8249	// The bottom of the stack might have a default value. It must be adjusted
8250	// to the current value to ensure that the packing state is preserved after
8251	// popping entries that were included/imported from a PCH/module.
8252	bool DropFirst = false;
8253	if (!PragmaAlignPackStack.empty() &&
8254	PragmaAlignPackStack.front().Location.isInvalid()) {
8255	assert(PragmaAlignPackStack.front().Value ==
8256	SemaObj->AlignPackStack.DefaultValue &&
8257	"Expected a default alignment value");
8258	SemaObj->AlignPackStack.Stack.emplace_back(
8259	Args&: PragmaAlignPackStack.front().SlotLabel,
8260	Args&: SemaObj->AlignPackStack.CurrentValue,
8261	Args&: SemaObj->AlignPackStack.CurrentPragmaLocation,
8262	Args&: PragmaAlignPackStack.front().PushLocation);
8263	DropFirst = true;
8264	}
8265	for (const auto &Entry :
8266	llvm::ArrayRef(PragmaAlignPackStack).drop_front(N: DropFirst ? 1 : 0)) {
8267	SemaObj->AlignPackStack.Stack.emplace_back(
8268	Args: Entry.SlotLabel, Args: Entry.Value, Args: Entry.Location, Args: Entry.PushLocation);
8269	}
8270	if (PragmaAlignPackCurrentLocation.isInvalid()) {
8271	assert(*PragmaAlignPackCurrentValue ==
8272	SemaObj->AlignPackStack.DefaultValue &&
8273	"Expected a default align and pack value");
8274	// Keep the current values.
8275	} else {
8276	SemaObj->AlignPackStack.CurrentValue = *PragmaAlignPackCurrentValue;
8277	SemaObj->AlignPackStack.CurrentPragmaLocation =
8278	PragmaAlignPackCurrentLocation;
8279	}
8280	}
8281	if (FpPragmaCurrentValue) {
8282	// The bottom of the stack might have a default value. It must be adjusted
8283	// to the current value to ensure that fp-pragma state is preserved after
8284	// popping entries that were included/imported from a PCH/module.
8285	bool DropFirst = false;
8286	if (!FpPragmaStack.empty() && FpPragmaStack.front().Location.isInvalid()) {
8287	assert(FpPragmaStack.front().Value ==
8288	SemaObj->FpPragmaStack.DefaultValue &&
8289	"Expected a default pragma float_control value");
8290	SemaObj->FpPragmaStack.Stack.emplace_back(
8291	Args&: FpPragmaStack.front().SlotLabel, Args&: SemaObj->FpPragmaStack.CurrentValue,
8292	Args&: SemaObj->FpPragmaStack.CurrentPragmaLocation,
8293	Args&: FpPragmaStack.front().PushLocation);
8294	DropFirst = true;
8295	}
8296	for (const auto &Entry :
8297	llvm::ArrayRef(FpPragmaStack).drop_front(N: DropFirst ? 1 : 0))
8298	SemaObj->FpPragmaStack.Stack.emplace_back(
8299	Args: Entry.SlotLabel, Args: Entry.Value, Args: Entry.Location, Args: Entry.PushLocation);
8300	if (FpPragmaCurrentLocation.isInvalid()) {
8301	assert(*FpPragmaCurrentValue == SemaObj->FpPragmaStack.DefaultValue &&
8302	"Expected a default pragma float_control value");
8303	// Keep the current values.
8304	} else {
8305	SemaObj->FpPragmaStack.CurrentValue = *FpPragmaCurrentValue;
8306	SemaObj->FpPragmaStack.CurrentPragmaLocation = FpPragmaCurrentLocation;
8307	}
8308	}
8309
8310	// For non-modular AST files, restore visiblity of modules.
8311	for (auto &Import : PendingImportedModulesSema) {
8312	if (Import.ImportLoc.isInvalid())
8313	continue;
8314	if (Module *Imported = getSubmodule(GlobalID: Import.ID)) {
8315	SemaObj->makeModuleVisible(Mod: Imported, ImportLoc: Import.ImportLoc);
8316	}
8317	}
8318	PendingImportedModulesSema.clear();
8319	}
8320
8321	IdentifierInfo *ASTReader::get(StringRef Name) {
8322	// Note that we are loading an identifier.
8323	Deserializing AnIdentifier(this);
8324
8325	IdentifierLookupVisitor Visitor(Name, /*PriorGeneration=*/0,
8326	NumIdentifierLookups,
8327	NumIdentifierLookupHits);
8328
8329	// We don't need to do identifier table lookups in C++ modules (we preload
8330	// all interesting declarations, and don't need to use the scope for name
8331	// lookups). Perform the lookup in PCH files, though, since we don't build
8332	// a complete initial identifier table if we're carrying on from a PCH.
8333	if (PP.getLangOpts().CPlusPlus) {
8334	for (auto *F : ModuleMgr.pch_modules())
8335	if (Visitor(*F))
8336	break;
8337	} else {
8338	// If there is a global index, look there first to determine which modules
8339	// provably do not have any results for this identifier.
8340	GlobalModuleIndex::HitSet Hits;
8341	GlobalModuleIndex::HitSet *HitsPtr = nullptr;
8342	if (!loadGlobalIndex()) {
8343	if (GlobalIndex->lookupIdentifier(Name, Hits)) {
8344	HitsPtr = &Hits;
8345	}
8346	}
8347
8348	ModuleMgr.visit(Visitor, ModuleFilesHit: HitsPtr);
8349	}
8350
8351	IdentifierInfo *II = Visitor.getIdentifierInfo();
8352	markIdentifierUpToDate(II);
8353	return II;
8354	}
8355
8356	namespace clang {
8357
8358	/// An identifier-lookup iterator that enumerates all of the
8359	/// identifiers stored within a set of AST files.
8360	class ASTIdentifierIterator : public IdentifierIterator {
8361	/// The AST reader whose identifiers are being enumerated.
8362	const ASTReader &Reader;
8363
8364	/// The current index into the chain of AST files stored in
8365	/// the AST reader.
8366	unsigned Index;
8367
8368	/// The current position within the identifier lookup table
8369	/// of the current AST file.
8370	ASTIdentifierLookupTable::key_iterator Current;
8371
8372	/// The end position within the identifier lookup table of
8373	/// the current AST file.
8374	ASTIdentifierLookupTable::key_iterator End;
8375
8376	/// Whether to skip any modules in the ASTReader.
8377	bool SkipModules;
8378
8379	public:
8380	explicit ASTIdentifierIterator(const ASTReader &Reader,
8381	bool SkipModules = false);
8382
8383	StringRef Next() override;
8384	};
8385
8386	} // namespace clang
8387
8388	ASTIdentifierIterator::ASTIdentifierIterator(const ASTReader &Reader,
8389	bool SkipModules)
8390	: Reader(Reader), Index(Reader.ModuleMgr.size()), SkipModules(SkipModules) {
8391	}
8392
8393	StringRef ASTIdentifierIterator::Next() {
8394	while (Current == End) {
8395	// If we have exhausted all of our AST files, we're done.
8396	if (Index == 0)
8397	return StringRef();
8398
8399	--Index;
8400	ModuleFile &F = Reader.ModuleMgr[Index];
8401	if (SkipModules && F.isModule())
8402	continue;
8403
8404	ASTIdentifierLookupTable *IdTable =
8405	(ASTIdentifierLookupTable *)F.IdentifierLookupTable;
8406	Current = IdTable->key_begin();
8407	End = IdTable->key_end();
8408	}
8409
8410	// We have any identifiers remaining in the current AST file; return
8411	// the next one.
8412	StringRef Result = *Current;
8413	++Current;
8414	return Result;
8415	}
8416
8417	namespace {
8418
8419	/// A utility for appending two IdentifierIterators.
8420	class ChainedIdentifierIterator : public IdentifierIterator {
8421	std::unique_ptr<IdentifierIterator> Current;
8422	std::unique_ptr<IdentifierIterator> Queued;
8423
8424	public:
8425	ChainedIdentifierIterator(std::unique_ptr<IdentifierIterator> First,
8426	std::unique_ptr<IdentifierIterator> Second)
8427	: Current(std::move(First)), Queued(std::move(Second)) {}
8428
8429	StringRef Next() override {
8430	if (!Current)
8431	return StringRef();
8432
8433	StringRef result = Current->Next();
8434	if (!result.empty())
8435	return result;
8436
8437	// Try the queued iterator, which may itself be empty.
8438	Current.reset();
8439	std::swap(x&: Current, y&: Queued);
8440	return Next();
8441	}
8442	};
8443
8444	} // namespace
8445
8446	IdentifierIterator *ASTReader::getIdentifiers() {
8447	if (!loadGlobalIndex()) {
8448	std::unique_ptr<IdentifierIterator> ReaderIter(
8449	new ASTIdentifierIterator(*this, /*SkipModules=*/true));
8450	std::unique_ptr<IdentifierIterator> ModulesIter(
8451	GlobalIndex->createIdentifierIterator());
8452	return new ChainedIdentifierIterator(std::move(ReaderIter),
8453	std::move(ModulesIter));
8454	}
8455
8456	return new ASTIdentifierIterator(*this);
8457	}
8458
8459	namespace clang {
8460	namespace serialization {
8461
8462	class ReadMethodPoolVisitor {
8463	ASTReader &Reader;
8464	Selector Sel;
8465	unsigned PriorGeneration;
8466	unsigned InstanceBits = 0;
8467	unsigned FactoryBits = 0;
8468	bool InstanceHasMoreThanOneDecl = false;
8469	bool FactoryHasMoreThanOneDecl = false;
8470	SmallVector<ObjCMethodDecl *, 4> InstanceMethods;
8471	SmallVector<ObjCMethodDecl *, 4> FactoryMethods;
8472
8473	public:
8474	ReadMethodPoolVisitor(ASTReader &Reader, Selector Sel,
8475	unsigned PriorGeneration)
8476	: Reader(Reader), Sel(Sel), PriorGeneration(PriorGeneration) {}
8477
8478	bool operator()(ModuleFile &M) {
8479	if (!M.SelectorLookupTable)
8480	return false;
8481
8482	// If we've already searched this module file, skip it now.
8483	if (M.Generation <= PriorGeneration)
8484	return true;
8485
8486	++Reader.NumMethodPoolTableLookups;
8487	ASTSelectorLookupTable *PoolTable
8488	= (ASTSelectorLookupTable*)M.SelectorLookupTable;
8489	ASTSelectorLookupTable::iterator Pos = PoolTable->find(Sel);
8490	if (Pos == PoolTable->end())
8491	return false;
8492
8493	++Reader.NumMethodPoolTableHits;
8494	++Reader.NumSelectorsRead;
8495	// FIXME: Not quite happy with the statistics here. We probably should
8496	// disable this tracking when called via LoadSelector.
8497	// Also, should entries without methods count as misses?
8498	++Reader.NumMethodPoolEntriesRead;
8499	ASTSelectorLookupTrait::data_type Data = *Pos;
8500	if (Reader.DeserializationListener)
8501	Reader.DeserializationListener->SelectorRead(Data.ID, Sel);
8502
8503	// Append methods in the reverse order, so that later we can process them
8504	// in the order they appear in the source code by iterating through
8505	// the vector in the reverse order.
8506	InstanceMethods.append(in_start: Data.Instance.rbegin(), in_end: Data.Instance.rend());
8507	FactoryMethods.append(in_start: Data.Factory.rbegin(), in_end: Data.Factory.rend());
8508	InstanceBits = Data.InstanceBits;
8509	FactoryBits = Data.FactoryBits;
8510	InstanceHasMoreThanOneDecl = Data.InstanceHasMoreThanOneDecl;
8511	FactoryHasMoreThanOneDecl = Data.FactoryHasMoreThanOneDecl;
8512	return false;
8513	}
8514
8515	/// Retrieve the instance methods found by this visitor.
8516	ArrayRef<ObjCMethodDecl *> getInstanceMethods() const {
8517	return InstanceMethods;
8518	}
8519
8520	/// Retrieve the instance methods found by this visitor.
8521	ArrayRef<ObjCMethodDecl *> getFactoryMethods() const {
8522	return FactoryMethods;
8523	}
8524
8525	unsigned getInstanceBits() const { return InstanceBits; }
8526	unsigned getFactoryBits() const { return FactoryBits; }
8527
8528	bool instanceHasMoreThanOneDecl() const {
8529	return InstanceHasMoreThanOneDecl;
8530	}
8531
8532	bool factoryHasMoreThanOneDecl() const { return FactoryHasMoreThanOneDecl; }
8533	};
8534
8535	} // namespace serialization
8536	} // namespace clang
8537
8538	/// Add the given set of methods to the method list.
8539	static void addMethodsToPool(Sema &S, ArrayRef<ObjCMethodDecl *> Methods,
8540	ObjCMethodList &List) {
8541	for (ObjCMethodDecl *M : llvm::reverse(C&: Methods))
8542	S.addMethodToGlobalList(List: &List, Method: M);
8543	}
8544
8545	void ASTReader::ReadMethodPool(Selector Sel) {
8546	// Get the selector generation and update it to the current generation.
8547	unsigned &Generation = SelectorGeneration[Sel];
8548	unsigned PriorGeneration = Generation;
8549	Generation = getGeneration();
8550	SelectorOutOfDate[Sel] = false;
8551
8552	// Search for methods defined with this selector.
8553	++NumMethodPoolLookups;
8554	ReadMethodPoolVisitor Visitor(*this, Sel, PriorGeneration);
8555	ModuleMgr.visit(Visitor);
8556
8557	if (Visitor.getInstanceMethods().empty() &&
8558	Visitor.getFactoryMethods().empty())
8559	return;
8560
8561	++NumMethodPoolHits;
8562
8563	if (!getSema())
8564	return;
8565
8566	Sema &S = *getSema();
8567	Sema::GlobalMethodPool::iterator Pos =
8568	S.MethodPool.insert(Val: std::make_pair(x&: Sel, y: Sema::GlobalMethodPool::Lists()))
8569	.first;
8570
8571	Pos->second.first.setBits(Visitor.getInstanceBits());
8572	Pos->second.first.setHasMoreThanOneDecl(Visitor.instanceHasMoreThanOneDecl());
8573	Pos->second.second.setBits(Visitor.getFactoryBits());
8574	Pos->second.second.setHasMoreThanOneDecl(Visitor.factoryHasMoreThanOneDecl());
8575
8576	// Add methods to the global pool *after* setting hasMoreThanOneDecl, since
8577	// when building a module we keep every method individually and may need to
8578	// update hasMoreThanOneDecl as we add the methods.
8579	addMethodsToPool(S, Visitor.getInstanceMethods(), Pos->second.first);
8580	addMethodsToPool(S, Visitor.getFactoryMethods(), Pos->second.second);
8581	}
8582
8583	void ASTReader::updateOutOfDateSelector(Selector Sel) {
8584	if (SelectorOutOfDate[Sel])
8585	ReadMethodPool(Sel);
8586	}
8587
8588	void ASTReader::ReadKnownNamespaces(
8589	SmallVectorImpl<NamespaceDecl *> &Namespaces) {
8590	Namespaces.clear();
8591
8592	for (unsigned I = 0, N = KnownNamespaces.size(); I != N; ++I) {
8593	if (NamespaceDecl *Namespace
8594	= dyn_cast_or_null<NamespaceDecl>(Val: GetDecl(ID: KnownNamespaces[I])))
8595	Namespaces.push_back(Elt: Namespace);
8596	}
8597	}
8598
8599	void ASTReader::ReadUndefinedButUsed(
8600	llvm::MapVector<NamedDecl *, SourceLocation> &Undefined) {
8601	for (unsigned Idx = 0, N = UndefinedButUsed.size(); Idx != N;) {
8602	NamedDecl *D = cast<NamedDecl>(Val: GetDecl(ID: UndefinedButUsed[Idx++]));
8603	SourceLocation Loc =
8604	SourceLocation::getFromRawEncoding(Encoding: UndefinedButUsed[Idx++]);
8605	Undefined.insert(KV: std::make_pair(x&: D, y&: Loc));
8606	}
8607	}
8608
8609	void ASTReader::ReadMismatchingDeleteExpressions(llvm::MapVector<
8610	FieldDecl *, llvm::SmallVector<std::pair<SourceLocation, bool>, 4>> &
8611	Exprs) {
8612	for (unsigned Idx = 0, N = DelayedDeleteExprs.size(); Idx != N;) {
8613	FieldDecl *FD = cast<FieldDecl>(Val: GetDecl(ID: DelayedDeleteExprs[Idx++]));
8614	uint64_t Count = DelayedDeleteExprs[Idx++];
8615	for (uint64_t C = 0; C < Count; ++C) {
8616	SourceLocation DeleteLoc =
8617	SourceLocation::getFromRawEncoding(Encoding: DelayedDeleteExprs[Idx++]);
8618	const bool IsArrayForm = DelayedDeleteExprs[Idx++];
8619	Exprs[FD].push_back(Elt: std::make_pair(x&: DeleteLoc, y: IsArrayForm));
8620	}
8621	}
8622	}
8623
8624	void ASTReader::ReadTentativeDefinitions(
8625	SmallVectorImpl<VarDecl *> &TentativeDefs) {
8626	for (unsigned I = 0, N = TentativeDefinitions.size(); I != N; ++I) {
8627	VarDecl *Var = dyn_cast_or_null<VarDecl>(Val: GetDecl(ID: TentativeDefinitions[I]));
8628	if (Var)
8629	TentativeDefs.push_back(Elt: Var);
8630	}
8631	TentativeDefinitions.clear();
8632	}
8633
8634	void ASTReader::ReadUnusedFileScopedDecls(
8635	SmallVectorImpl<const DeclaratorDecl *> &Decls) {
8636	for (unsigned I = 0, N = UnusedFileScopedDecls.size(); I != N; ++I) {
8637	DeclaratorDecl *D
8638	= dyn_cast_or_null<DeclaratorDecl>(Val: GetDecl(ID: UnusedFileScopedDecls[I]));
8639	if (D)
8640	Decls.push_back(Elt: D);
8641	}
8642	UnusedFileScopedDecls.clear();
8643	}
8644
8645	void ASTReader::ReadDelegatingConstructors(
8646	SmallVectorImpl<CXXConstructorDecl *> &Decls) {
8647	for (unsigned I = 0, N = DelegatingCtorDecls.size(); I != N; ++I) {
8648	CXXConstructorDecl *D
8649	= dyn_cast_or_null<CXXConstructorDecl>(Val: GetDecl(ID: DelegatingCtorDecls[I]));
8650	if (D)
8651	Decls.push_back(Elt: D);
8652	}
8653	DelegatingCtorDecls.clear();
8654	}
8655
8656	void ASTReader::ReadExtVectorDecls(SmallVectorImpl<TypedefNameDecl *> &Decls) {
8657	for (unsigned I = 0, N = ExtVectorDecls.size(); I != N; ++I) {
8658	TypedefNameDecl *D
8659	= dyn_cast_or_null<TypedefNameDecl>(Val: GetDecl(ID: ExtVectorDecls[I]));
8660	if (D)
8661	Decls.push_back(Elt: D);
8662	}
8663	ExtVectorDecls.clear();
8664	}
8665
8666	void ASTReader::ReadUnusedLocalTypedefNameCandidates(
8667	llvm::SmallSetVector<const TypedefNameDecl *, 4> &Decls) {
8668	for (unsigned I = 0, N = UnusedLocalTypedefNameCandidates.size(); I != N;
8669	++I) {
8670	TypedefNameDecl *D = dyn_cast_or_null<TypedefNameDecl>(
8671	Val: GetDecl(ID: UnusedLocalTypedefNameCandidates[I]));
8672	if (D)
8673	Decls.insert(X: D);
8674	}
8675	UnusedLocalTypedefNameCandidates.clear();
8676	}
8677
8678	void ASTReader::ReadDeclsToCheckForDeferredDiags(
8679	llvm::SmallSetVector<Decl *, 4> &Decls) {
8680	for (auto I : DeclsToCheckForDeferredDiags) {
8681	auto *D = dyn_cast_or_null<Decl>(Val: GetDecl(ID: I));
8682	if (D)
8683	Decls.insert(X: D);
8684	}
8685	DeclsToCheckForDeferredDiags.clear();
8686	}
8687
8688	void ASTReader::ReadReferencedSelectors(
8689	SmallVectorImpl<std::pair<Selector, SourceLocation>> &Sels) {
8690	if (ReferencedSelectorsData.empty())
8691	return;
8692
8693	// If there are @selector references added them to its pool. This is for
8694	// implementation of -Wselector.
8695	unsigned int DataSize = ReferencedSelectorsData.size()-1;
8696	unsigned I = 0;
8697	while (I < DataSize) {
8698	Selector Sel = DecodeSelector(Idx: ReferencedSelectorsData[I++]);
8699	SourceLocation SelLoc
8700	= SourceLocation::getFromRawEncoding(Encoding: ReferencedSelectorsData[I++]);
8701	Sels.push_back(Elt: std::make_pair(x&: Sel, y&: SelLoc));
8702	}
8703	ReferencedSelectorsData.clear();
8704	}
8705
8706	void ASTReader::ReadWeakUndeclaredIdentifiers(
8707	SmallVectorImpl<std::pair<IdentifierInfo *, WeakInfo>> &WeakIDs) {
8708	if (WeakUndeclaredIdentifiers.empty())
8709	return;
8710
8711	for (unsigned I = 0, N = WeakUndeclaredIdentifiers.size(); I < N; /*none*/) {
8712	IdentifierInfo *WeakId
8713	= DecodeIdentifierInfo(ID: WeakUndeclaredIdentifiers[I++]);
8714	IdentifierInfo *AliasId
8715	= DecodeIdentifierInfo(ID: WeakUndeclaredIdentifiers[I++]);
8716	SourceLocation Loc =
8717	SourceLocation::getFromRawEncoding(Encoding: WeakUndeclaredIdentifiers[I++]);
8718	WeakInfo WI(AliasId, Loc);
8719	WeakIDs.push_back(Elt: std::make_pair(x&: WeakId, y&: WI));
8720	}
8721	WeakUndeclaredIdentifiers.clear();
8722	}
8723
8724	void ASTReader::ReadUsedVTables(SmallVectorImpl<ExternalVTableUse> &VTables) {
8725	for (unsigned Idx = 0, N = VTableUses.size(); Idx < N; /* In loop */) {
8726	ExternalVTableUse VT;
8727	VT.Record = dyn_cast_or_null<CXXRecordDecl>(Val: GetDecl(ID: VTableUses[Idx++]));
8728	VT.Location = SourceLocation::getFromRawEncoding(Encoding: VTableUses[Idx++]);
8729	VT.DefinitionRequired = VTableUses[Idx++];
8730	VTables.push_back(Elt: VT);
8731	}
8732
8733	VTableUses.clear();
8734	}
8735
8736	void ASTReader::ReadPendingInstantiations(
8737	SmallVectorImpl<std::pair<ValueDecl *, SourceLocation>> &Pending) {
8738	for (unsigned Idx = 0, N = PendingInstantiations.size(); Idx < N;) {
8739	ValueDecl *D = cast<ValueDecl>(Val: GetDecl(ID: PendingInstantiations[Idx++]));
8740	SourceLocation Loc
8741	= SourceLocation::getFromRawEncoding(Encoding: PendingInstantiations[Idx++]);
8742
8743	Pending.push_back(Elt: std::make_pair(x&: D, y&: Loc));
8744	}
8745	PendingInstantiations.clear();
8746	}
8747
8748	void ASTReader::ReadLateParsedTemplates(
8749	llvm::MapVector<const FunctionDecl *, std::unique_ptr<LateParsedTemplate>>
8750	&LPTMap) {
8751	for (auto &LPT : LateParsedTemplates) {
8752	ModuleFile *FMod = LPT.first;
8753	RecordDataImpl &LateParsed = LPT.second;
8754	for (unsigned Idx = 0, N = LateParsed.size(); Idx < N;
8755	/* In loop */) {
8756	FunctionDecl *FD =
8757	cast<FunctionDecl>(Val: GetLocalDecl(F&: *FMod, LocalID: LateParsed[Idx++]));
8758
8759	auto LT = std::make_unique<LateParsedTemplate>();
8760	LT->D = GetLocalDecl(F&: *FMod, LocalID: LateParsed[Idx++]);
8761	LT->FPO = FPOptions::getFromOpaqueInt(Value: LateParsed[Idx++]);
8762
8763	ModuleFile *F = getOwningModuleFile(D: LT->D);
8764	assert(F && "No module");
8765
8766	unsigned TokN = LateParsed[Idx++];
8767	LT->Toks.reserve(N: TokN);
8768	for (unsigned T = 0; T < TokN; ++T)
8769	LT->Toks.push_back(Elt: ReadToken(M&: *F, Record: LateParsed, Idx));
8770
8771	LPTMap.insert(KV: std::make_pair(x&: FD, y: std::move(LT)));
8772	}
8773	}
8774
8775	LateParsedTemplates.clear();
8776	}
8777
8778	void ASTReader::AssignedLambdaNumbering(const CXXRecordDecl *Lambda) {
8779	if (Lambda->getLambdaContextDecl()) {
8780	// Keep track of this lambda so it can be merged with another lambda that
8781	// is loaded later.
8782	LambdaDeclarationsForMerging.insert(
8783	{{Lambda->getLambdaContextDecl()->getCanonicalDecl(),
8784	Lambda->getLambdaIndexInContext()},
8785	const_cast<CXXRecordDecl *>(Lambda)});
8786	}
8787	}
8788
8789	void ASTReader::LoadSelector(Selector Sel) {
8790	// It would be complicated to avoid reading the methods anyway. So don't.
8791	ReadMethodPool(Sel);
8792	}
8793
8794	void ASTReader::SetIdentifierInfo(IdentifierID ID, IdentifierInfo *II) {
8795	assert(ID && "Non-zero identifier ID required");
8796	assert(ID <= IdentifiersLoaded.size() && "identifier ID out of range");
8797	IdentifiersLoaded[ID - 1] = II;
8798	if (DeserializationListener)
8799	DeserializationListener->IdentifierRead(ID, II);
8800	}
8801
8802	/// Set the globally-visible declarations associated with the given
8803	/// identifier.
8804	///
8805	/// If the AST reader is currently in a state where the given declaration IDs
8806	/// cannot safely be resolved, they are queued until it is safe to resolve
8807	/// them.
8808	///
8809	/// \param II an IdentifierInfo that refers to one or more globally-visible
8810	/// declarations.
8811	///
8812	/// \param DeclIDs the set of declaration IDs with the name @p II that are
8813	/// visible at global scope.
8814	///
8815	/// \param Decls if non-null, this vector will be populated with the set of
8816	/// deserialized declarations. These declarations will not be pushed into
8817	/// scope.
8818	void
8819	ASTReader::SetGloballyVisibleDecls(IdentifierInfo *II,
8820	const SmallVectorImpl<uint32_t> &DeclIDs,
8821	SmallVectorImpl<Decl *> *Decls) {
8822	if (NumCurrentElementsDeserializing && !Decls) {
8823	PendingIdentifierInfos[II].append(in_start: DeclIDs.begin(), in_end: DeclIDs.end());
8824	return;
8825	}
8826
8827	for (unsigned I = 0, N = DeclIDs.size(); I != N; ++I) {
8828	if (!SemaObj) {
8829	// Queue this declaration so that it will be added to the
8830	// translation unit scope and identifier's declaration chain
8831	// once a Sema object is known.
8832	PreloadedDeclIDs.push_back(Elt: DeclIDs[I]);
8833	continue;
8834	}
8835
8836	NamedDecl *D = cast<NamedDecl>(Val: GetDecl(ID: DeclIDs[I]));
8837
8838	// If we're simply supposed to record the declarations, do so now.
8839	if (Decls) {
8840	Decls->push_back(D);
8841	continue;
8842	}
8843
8844	// Introduce this declaration into the translation-unit scope
8845	// and add it to the declaration chain for this identifier, so
8846	// that (unqualified) name lookup will find it.
8847	pushExternalDeclIntoScope(D, Name: II);
8848	}
8849	}
8850
8851	IdentifierInfo *ASTReader::DecodeIdentifierInfo(IdentifierID ID) {
8852	if (ID == 0)
8853	return nullptr;
8854
8855	if (IdentifiersLoaded.empty()) {
8856	Error(Msg: "no identifier table in AST file");
8857	return nullptr;
8858	}
8859
8860	ID -= 1;
8861	if (!IdentifiersLoaded[ID]) {
8862	GlobalIdentifierMapType::iterator I = GlobalIdentifierMap.find(K: ID + 1);
8863	assert(I != GlobalIdentifierMap.end() && "Corrupted global identifier map");
8864	ModuleFile *M = I->second;
8865	unsigned Index = ID - M->BaseIdentifierID;
8866	const unsigned char *Data =
8867	M->IdentifierTableData + M->IdentifierOffsets[Index];
8868
8869	ASTIdentifierLookupTrait Trait(*this, *M);
8870	auto KeyDataLen = Trait.ReadKeyDataLength(d&: Data);
8871	auto Key = Trait.ReadKey(d: Data, n: KeyDataLen.first);
8872	auto &II = PP.getIdentifierTable().get(Name: Key);
8873	IdentifiersLoaded[ID] = &II;
8874	markIdentifierFromAST(Reader&: *this, II);
8875	if (DeserializationListener)
8876	DeserializationListener->IdentifierRead(ID: ID + 1, II: &II);
8877	}
8878
8879	return IdentifiersLoaded[ID];
8880	}
8881
8882	IdentifierInfo *ASTReader::getLocalIdentifier(ModuleFile &M, unsigned LocalID) {
8883	return DecodeIdentifierInfo(ID: getGlobalIdentifierID(M, LocalID));
8884	}
8885
8886	IdentifierID ASTReader::getGlobalIdentifierID(ModuleFile &M, unsigned LocalID) {
8887	if (LocalID < NUM_PREDEF_IDENT_IDS)
8888	return LocalID;
8889
8890	if (!M.ModuleOffsetMap.empty())
8891	ReadModuleOffsetMap(F&: M);
8892
8893	ContinuousRangeMap<uint32_t, int, 2>::iterator I
8894	= M.IdentifierRemap.find(K: LocalID - NUM_PREDEF_IDENT_IDS);
8895	assert(I != M.IdentifierRemap.end()
8896	&& "Invalid index into identifier index remap");
8897
8898	return LocalID + I->second;
8899	}
8900
8901	MacroInfo *ASTReader::getMacro(MacroID ID) {
8902	if (ID == 0)
8903	return nullptr;
8904
8905	if (MacrosLoaded.empty()) {
8906	Error(Msg: "no macro table in AST file");
8907	return nullptr;
8908	}
8909
8910	ID -= NUM_PREDEF_MACRO_IDS;
8911	if (!MacrosLoaded[ID]) {
8912	GlobalMacroMapType::iterator I
8913	= GlobalMacroMap.find(K: ID + NUM_PREDEF_MACRO_IDS);
8914	assert(I != GlobalMacroMap.end() && "Corrupted global macro map");
8915	ModuleFile *M = I->second;
8916	unsigned Index = ID - M->BaseMacroID;
8917	MacrosLoaded[ID] =
8918	ReadMacroRecord(F&: *M, Offset: M->MacroOffsetsBase + M->MacroOffsets[Index]);
8919
8920	if (DeserializationListener)
8921	DeserializationListener->MacroRead(ID: ID + NUM_PREDEF_MACRO_IDS,
8922	MI: MacrosLoaded[ID]);
8923	}
8924
8925	return MacrosLoaded[ID];
8926	}
8927
8928	MacroID ASTReader::getGlobalMacroID(ModuleFile &M, unsigned LocalID) {
8929	if (LocalID < NUM_PREDEF_MACRO_IDS)
8930	return LocalID;
8931
8932	if (!M.ModuleOffsetMap.empty())
8933	ReadModuleOffsetMap(F&: M);
8934
8935	ContinuousRangeMap<uint32_t, int, 2>::iterator I
8936	= M.MacroRemap.find(K: LocalID - NUM_PREDEF_MACRO_IDS);
8937	assert(I != M.MacroRemap.end() && "Invalid index into macro index remap");
8938
8939	return LocalID + I->second;
8940	}
8941
8942	serialization::SubmoduleID
8943	ASTReader::getGlobalSubmoduleID(ModuleFile &M, unsigned LocalID) {
8944	if (LocalID < NUM_PREDEF_SUBMODULE_IDS)
8945	return LocalID;
8946
8947	if (!M.ModuleOffsetMap.empty())
8948	ReadModuleOffsetMap(F&: M);
8949
8950	ContinuousRangeMap<uint32_t, int, 2>::iterator I
8951	= M.SubmoduleRemap.find(K: LocalID - NUM_PREDEF_SUBMODULE_IDS);
8952	assert(I != M.SubmoduleRemap.end()
8953	&& "Invalid index into submodule index remap");
8954
8955	return LocalID + I->second;
8956	}
8957
8958	Module *ASTReader::getSubmodule(SubmoduleID GlobalID) {
8959	if (GlobalID < NUM_PREDEF_SUBMODULE_IDS) {
8960	assert(GlobalID == 0 && "Unhandled global submodule ID");
8961	return nullptr;
8962	}
8963
8964	if (GlobalID > SubmodulesLoaded.size()) {
8965	Error(Msg: "submodule ID out of range in AST file");
8966	return nullptr;
8967	}
8968
8969	return SubmodulesLoaded[GlobalID - NUM_PREDEF_SUBMODULE_IDS];
8970	}
8971
8972	Module *ASTReader::getModule(unsigned ID) {
8973	return getSubmodule(GlobalID: ID);
8974	}
8975
8976	ModuleFile *ASTReader::getLocalModuleFile(ModuleFile &M, unsigned ID) {
8977	if (ID & 1) {
8978	// It's a module, look it up by submodule ID.
8979	auto I = GlobalSubmoduleMap.find(K: getGlobalSubmoduleID(M, LocalID: ID >> 1));
8980	return I == GlobalSubmoduleMap.end() ? nullptr : I->second;
8981	} else {
8982	// It's a prefix (preamble, PCH, ...). Look it up by index.
8983	unsigned IndexFromEnd = ID >> 1;
8984	assert(IndexFromEnd && "got reference to unknown module file");
8985	return getModuleManager().pch_modules().end()[-IndexFromEnd];
8986	}
8987	}
8988
8989	unsigned ASTReader::getModuleFileID(ModuleFile *M) {
8990	if (!M)
8991	return 1;
8992
8993	// For a file representing a module, use the submodule ID of the top-level
8994	// module as the file ID. For any other kind of file, the number of such
8995	// files loaded beforehand will be the same on reload.
8996	// FIXME: Is this true even if we have an explicit module file and a PCH?
8997	if (M->isModule())
8998	return ((M->BaseSubmoduleID + NUM_PREDEF_SUBMODULE_IDS) << 1) | 1;
8999
9000	auto PCHModules = getModuleManager().pch_modules();
9001	auto I = llvm::find(Range&: PCHModules, Val: M);
9002	assert(I != PCHModules.end() && "emitting reference to unknown file");
9003	return (I - PCHModules.end()) << 1;
9004	}
9005
9006	std::optional<ASTSourceDescriptor> ASTReader::getSourceDescriptor(unsigned ID) {
9007	if (Module *M = getSubmodule(GlobalID: ID))
9008	return ASTSourceDescriptor(*M);
9009
9010	// If there is only a single PCH, return it instead.
9011	// Chained PCH are not supported.
9012	const auto &PCHChain = ModuleMgr.pch_modules();
9013	if (std::distance(first: std::begin(cont: PCHChain), last: std::end(cont: PCHChain))) {
9014	ModuleFile &MF = ModuleMgr.getPrimaryModule();
9015	StringRef ModuleName = llvm::sys::path::filename(path: MF.OriginalSourceFileName);
9016	StringRef FileName = llvm::sys::path::filename(path: MF.FileName);
9017	return ASTSourceDescriptor(ModuleName,
9018	llvm::sys::path::parent_path(path: MF.FileName),
9019	FileName, MF.Signature);
9020	}
9021	return std::nullopt;
9022	}
9023
9024	ExternalASTSource::ExtKind ASTReader::hasExternalDefinitions(const Decl *FD) {
9025	auto I = DefinitionSource.find(Val: FD);
9026	if (I == DefinitionSource.end())
9027	return EK_ReplyHazy;
9028	return I->second ? EK_Never : EK_Always;
9029	}
9030
9031	Selector ASTReader::getLocalSelector(ModuleFile &M, unsigned LocalID) {
9032	return DecodeSelector(Idx: getGlobalSelectorID(M, LocalID));
9033	}
9034
9035	Selector ASTReader::DecodeSelector(serialization::SelectorID ID) {
9036	if (ID == 0)
9037	return Selector();
9038
9039	if (ID > SelectorsLoaded.size()) {
9040	Error(Msg: "selector ID out of range in AST file");
9041	return Selector();
9042	}
9043
9044	if (SelectorsLoaded[ID - 1].getAsOpaquePtr() == nullptr) {
9045	// Load this selector from the selector table.
9046	GlobalSelectorMapType::iterator I = GlobalSelectorMap.find(K: ID);
9047	assert(I != GlobalSelectorMap.end() && "Corrupted global selector map");
9048	ModuleFile &M = *I->second;
9049	ASTSelectorLookupTrait Trait(*this, M);
9050	unsigned Idx = ID - M.BaseSelectorID - NUM_PREDEF_SELECTOR_IDS;
9051	SelectorsLoaded[ID - 1] =
9052	Trait.ReadKey(d: M.SelectorLookupTableData + M.SelectorOffsets[Idx], 0);
9053	if (DeserializationListener)
9054	DeserializationListener->SelectorRead(iD: ID, Sel: SelectorsLoaded[ID - 1]);
9055	}
9056
9057	return SelectorsLoaded[ID - 1];
9058	}
9059
9060	Selector ASTReader::GetExternalSelector(serialization::SelectorID ID) {
9061	return DecodeSelector(ID);
9062	}
9063
9064	uint32_t ASTReader::GetNumExternalSelectors() {
9065	// ID 0 (the null selector) is considered an external selector.
9066	return getTotalNumSelectors() + 1;
9067	}
9068
9069	serialization::SelectorID
9070	ASTReader::getGlobalSelectorID(ModuleFile &M, unsigned LocalID) const {
9071	if (LocalID < NUM_PREDEF_SELECTOR_IDS)
9072	return LocalID;
9073
9074	if (!M.ModuleOffsetMap.empty())
9075	ReadModuleOffsetMap(F&: M);
9076
9077	ContinuousRangeMap<uint32_t, int, 2>::iterator I
9078	= M.SelectorRemap.find(K: LocalID - NUM_PREDEF_SELECTOR_IDS);
9079	assert(I != M.SelectorRemap.end()
9080	&& "Invalid index into selector index remap");
9081
9082	return LocalID + I->second;
9083	}
9084
9085	DeclarationNameLoc
9086	ASTRecordReader::readDeclarationNameLoc(DeclarationName Name) {
9087	switch (Name.getNameKind()) {
9088	case DeclarationName::CXXConstructorName:
9089	case DeclarationName::CXXDestructorName:
9090	case DeclarationName::CXXConversionFunctionName:
9091	return DeclarationNameLoc::makeNamedTypeLoc(TInfo: readTypeSourceInfo());
9092
9093	case DeclarationName::CXXOperatorName:
9094	return DeclarationNameLoc::makeCXXOperatorNameLoc(Range: readSourceRange());
9095
9096	case DeclarationName::CXXLiteralOperatorName:
9097	return DeclarationNameLoc::makeCXXLiteralOperatorNameLoc(
9098	Loc: readSourceLocation());
9099
9100	case DeclarationName::Identifier:
9101	case DeclarationName::ObjCZeroArgSelector:
9102	case DeclarationName::ObjCOneArgSelector:
9103	case DeclarationName::ObjCMultiArgSelector:
9104	case DeclarationName::CXXUsingDirective:
9105	case DeclarationName::CXXDeductionGuideName:
9106	break;
9107	}
9108	return DeclarationNameLoc();
9109	}
9110
9111	DeclarationNameInfo ASTRecordReader::readDeclarationNameInfo() {
9112	DeclarationNameInfo NameInfo;
9113	NameInfo.setName(readDeclarationName());
9114	NameInfo.setLoc(readSourceLocation());
9115	NameInfo.setInfo(readDeclarationNameLoc(Name: NameInfo.getName()));
9116	return NameInfo;
9117	}
9118
9119	void ASTRecordReader::readQualifierInfo(QualifierInfo &Info) {
9120	Info.QualifierLoc = readNestedNameSpecifierLoc();
9121	unsigned NumTPLists = readInt();
9122	Info.NumTemplParamLists = NumTPLists;
9123	if (NumTPLists) {
9124	Info.TemplParamLists =
9125	new (getContext()) TemplateParameterList *[NumTPLists];
9126	for (unsigned i = 0; i != NumTPLists; ++i)
9127	Info.TemplParamLists[i] = readTemplateParameterList();
9128	}
9129	}
9130
9131	TemplateParameterList *
9132	ASTRecordReader::readTemplateParameterList() {
9133	SourceLocation TemplateLoc = readSourceLocation();
9134	SourceLocation LAngleLoc = readSourceLocation();
9135	SourceLocation RAngleLoc = readSourceLocation();
9136
9137	unsigned NumParams = readInt();
9138	SmallVector<NamedDecl *, 16> Params;
9139	Params.reserve(N: NumParams);
9140	while (NumParams--)
9141	Params.push_back(Elt: readDeclAs<NamedDecl>());
9142
9143	bool HasRequiresClause = readBool();
9144	Expr *RequiresClause = HasRequiresClause ? readExpr() : nullptr;
9145
9146	TemplateParameterList *TemplateParams = TemplateParameterList::Create(
9147	C: getContext(), TemplateLoc, LAngleLoc, Params, RAngleLoc, RequiresClause);
9148	return TemplateParams;
9149	}
9150
9151	void ASTRecordReader::readTemplateArgumentList(
9152	SmallVectorImpl<TemplateArgument> &TemplArgs,
9153	bool Canonicalize) {
9154	unsigned NumTemplateArgs = readInt();
9155	TemplArgs.reserve(N: NumTemplateArgs);
9156	while (NumTemplateArgs--)
9157	TemplArgs.push_back(Elt: readTemplateArgument(Canonicalize));
9158	}
9159
9160	/// Read a UnresolvedSet structure.
9161	void ASTRecordReader::readUnresolvedSet(LazyASTUnresolvedSet &Set) {
9162	unsigned NumDecls = readInt();
9163	Set.reserve(C&: getContext(), N: NumDecls);
9164	while (NumDecls--) {
9165	DeclID ID = readDeclID();
9166	AccessSpecifier AS = (AccessSpecifier) readInt();
9167	Set.addLazyDecl(C&: getContext(), ID, AS);
9168	}
9169	}
9170
9171	CXXBaseSpecifier
9172	ASTRecordReader::readCXXBaseSpecifier() {
9173	bool isVirtual = readBool();
9174	bool isBaseOfClass = readBool();
9175	AccessSpecifier AS = static_cast<AccessSpecifier>(readInt());
9176	bool inheritConstructors = readBool();
9177	TypeSourceInfo *TInfo = readTypeSourceInfo();
9178	SourceRange Range = readSourceRange();
9179	SourceLocation EllipsisLoc = readSourceLocation();
9180	CXXBaseSpecifier Result(Range, isVirtual, isBaseOfClass, AS, TInfo,
9181	EllipsisLoc);
9182	Result.setInheritConstructors(inheritConstructors);
9183	return Result;
9184	}
9185
9186	CXXCtorInitializer **
9187	ASTRecordReader::readCXXCtorInitializers() {
9188	ASTContext &Context = getContext();
9189	unsigned NumInitializers = readInt();
9190	assert(NumInitializers && "wrote ctor initializers but have no inits");
9191	auto **CtorInitializers = new (Context) CXXCtorInitializer*[NumInitializers];
9192	for (unsigned i = 0; i != NumInitializers; ++i) {
9193	TypeSourceInfo *TInfo = nullptr;
9194	bool IsBaseVirtual = false;
9195	FieldDecl *Member = nullptr;
9196	IndirectFieldDecl *IndirectMember = nullptr;
9197
9198	CtorInitializerType Type = (CtorInitializerType) readInt();
9199	switch (Type) {
9200	case CTOR_INITIALIZER_BASE:
9201	TInfo = readTypeSourceInfo();
9202	IsBaseVirtual = readBool();
9203	break;
9204
9205	case CTOR_INITIALIZER_DELEGATING:
9206	TInfo = readTypeSourceInfo();
9207	break;
9208
9209	case CTOR_INITIALIZER_MEMBER:
9210	Member = readDeclAs<FieldDecl>();
9211	break;
9212
9213	case CTOR_INITIALIZER_INDIRECT_MEMBER:
9214	IndirectMember = readDeclAs<IndirectFieldDecl>();
9215	break;
9216	}
9217
9218	SourceLocation MemberOrEllipsisLoc = readSourceLocation();
9219	Expr *Init = readExpr();
9220	SourceLocation LParenLoc = readSourceLocation();
9221	SourceLocation RParenLoc = readSourceLocation();
9222
9223	CXXCtorInitializer *BOMInit;
9224	if (Type == CTOR_INITIALIZER_BASE)
9225	BOMInit = new (Context)
9226	CXXCtorInitializer(Context, TInfo, IsBaseVirtual, LParenLoc, Init,
9227	RParenLoc, MemberOrEllipsisLoc);
9228	else if (Type == CTOR_INITIALIZER_DELEGATING)
9229	BOMInit = new (Context)
9230	CXXCtorInitializer(Context, TInfo, LParenLoc, Init, RParenLoc);
9231	else if (Member)
9232	BOMInit = new (Context)
9233	CXXCtorInitializer(Context, Member, MemberOrEllipsisLoc, LParenLoc,
9234	Init, RParenLoc);
9235	else
9236	BOMInit = new (Context)
9237	CXXCtorInitializer(Context, IndirectMember, MemberOrEllipsisLoc,
9238	LParenLoc, Init, RParenLoc);
9239
9240	if (/*IsWritten*/readBool()) {
9241	unsigned SourceOrder = readInt();
9242	BOMInit->setSourceOrder(SourceOrder);
9243	}
9244
9245	CtorInitializers[i] = BOMInit;
9246	}
9247
9248	return CtorInitializers;
9249	}
9250
9251	NestedNameSpecifierLoc
9252	ASTRecordReader::readNestedNameSpecifierLoc() {
9253	ASTContext &Context = getContext();
9254	unsigned N = readInt();
9255	NestedNameSpecifierLocBuilder Builder;
9256	for (unsigned I = 0; I != N; ++I) {
9257	auto Kind = readNestedNameSpecifierKind();
9258	switch (Kind) {
9259	case NestedNameSpecifier::Identifier: {
9260	IdentifierInfo *II = readIdentifier();
9261	SourceRange Range = readSourceRange();
9262	Builder.Extend(Context, Identifier: II, IdentifierLoc: Range.getBegin(), ColonColonLoc: Range.getEnd());
9263	break;
9264	}
9265
9266	case NestedNameSpecifier::Namespace: {
9267	NamespaceDecl *NS = readDeclAs<NamespaceDecl>();
9268	SourceRange Range = readSourceRange();
9269	Builder.Extend(Context, Namespace: NS, NamespaceLoc: Range.getBegin(), ColonColonLoc: Range.getEnd());
9270	break;
9271	}
9272
9273	case NestedNameSpecifier::NamespaceAlias: {
9274	NamespaceAliasDecl *Alias = readDeclAs<NamespaceAliasDecl>();
9275	SourceRange Range = readSourceRange();
9276	Builder.Extend(Context, Alias, AliasLoc: Range.getBegin(), ColonColonLoc: Range.getEnd());
9277	break;
9278	}
9279
9280	case NestedNameSpecifier::TypeSpec:
9281	case NestedNameSpecifier::TypeSpecWithTemplate: {
9282	bool Template = readBool();
9283	TypeSourceInfo *T = readTypeSourceInfo();
9284	if (!T)
9285	return NestedNameSpecifierLoc();
9286	SourceLocation ColonColonLoc = readSourceLocation();
9287
9288	// FIXME: 'template' keyword location not saved anywhere, so we fake it.
9289	Builder.Extend(Context,
9290	TemplateKWLoc: Template? T->getTypeLoc().getBeginLoc() : SourceLocation(),
9291	TL: T->getTypeLoc(), ColonColonLoc);
9292	break;
9293	}
9294
9295	case NestedNameSpecifier::Global: {
9296	SourceLocation ColonColonLoc = readSourceLocation();
9297	Builder.MakeGlobal(Context, ColonColonLoc);
9298	break;
9299	}
9300
9301	case NestedNameSpecifier::Super: {
9302	CXXRecordDecl *RD = readDeclAs<CXXRecordDecl>();
9303	SourceRange Range = readSourceRange();
9304	Builder.MakeSuper(Context, RD, SuperLoc: Range.getBegin(), ColonColonLoc: Range.getEnd());
9305	break;
9306	}
9307	}
9308	}
9309
9310	return Builder.getWithLocInContext(Context);
9311	}
9312
9313	SourceRange ASTReader::ReadSourceRange(ModuleFile &F, const RecordData &Record,
9314	unsigned &Idx, LocSeq *Seq) {
9315	SourceLocation beg = ReadSourceLocation(ModuleFile&: F, Record, Idx, Seq);
9316	SourceLocation end = ReadSourceLocation(ModuleFile&: F, Record, Idx, Seq);
9317	return SourceRange(beg, end);
9318	}
9319
9320	llvm::BitVector ASTReader::ReadBitVector(const RecordData &Record,
9321	const StringRef Blob) {
9322	unsigned Count = Record[0];
9323	const char *Byte = Blob.data();
9324	llvm::BitVector Ret = llvm::BitVector(Count, false);
9325	for (unsigned I = 0; I < Count; ++Byte)
9326	for (unsigned Bit = 0; Bit < 8 && I < Count; ++Bit, ++I)
9327	if (*Byte & (1 << Bit))
9328	Ret[I] = true;
9329	return Ret;
9330	}
9331
9332	/// Read a floating-point value
9333	llvm::APFloat ASTRecordReader::readAPFloat(const llvm::fltSemantics &Sem) {
9334	return llvm::APFloat(Sem, readAPInt());
9335	}
9336
9337	// Read a string
9338	std::string ASTReader::ReadString(const RecordDataImpl &Record, unsigned &Idx) {
9339	unsigned Len = Record[Idx++];
9340	std::string Result(Record.data() + Idx, Record.data() + Idx + Len);
9341	Idx += Len;
9342	return Result;
9343	}
9344
9345	std::string ASTReader::ReadPath(ModuleFile &F, const RecordData &Record,
9346	unsigned &Idx) {
9347	std::string Filename = ReadString(Record, Idx);
9348	ResolveImportedPath(M&: F, Filename);
9349	return Filename;
9350	}
9351
9352	std::string ASTReader::ReadPath(StringRef BaseDirectory,
9353	const RecordData &Record, unsigned &Idx) {
9354	std::string Filename = ReadString(Record, Idx);
9355	if (!BaseDirectory.empty())
9356	ResolveImportedPath(Filename, Prefix: BaseDirectory);
9357	return Filename;
9358	}
9359
9360	VersionTuple ASTReader::ReadVersionTuple(const RecordData &Record,
9361	unsigned &Idx) {
9362	unsigned Major = Record[Idx++];
9363	unsigned Minor = Record[Idx++];
9364	unsigned Subminor = Record[Idx++];
9365	if (Minor == 0)
9366	return VersionTuple(Major);
9367	if (Subminor == 0)
9368	return VersionTuple(Major, Minor - 1);
9369	return VersionTuple(Major, Minor - 1, Subminor - 1);
9370	}
9371
9372	CXXTemporary *ASTReader::ReadCXXTemporary(ModuleFile &F,
9373	const RecordData &Record,
9374	unsigned &Idx) {
9375	CXXDestructorDecl *Decl = ReadDeclAs<CXXDestructorDecl>(F, R: Record, I&: Idx);
9376	return CXXTemporary::Create(C: getContext(), Destructor: Decl);
9377	}
9378
9379	DiagnosticBuilder ASTReader::Diag(unsigned DiagID) const {
9380	return Diag(Loc: CurrentImportLoc, DiagID);
9381	}
9382
9383	DiagnosticBuilder ASTReader::Diag(SourceLocation Loc, unsigned DiagID) const {
9384	return Diags.Report(Loc, DiagID);
9385	}
9386
9387	/// Retrieve the identifier table associated with the
9388	/// preprocessor.
9389	IdentifierTable &ASTReader::getIdentifierTable() {
9390	return PP.getIdentifierTable();
9391	}
9392
9393	/// Record that the given ID maps to the given switch-case
9394	/// statement.
9395	void ASTReader::RecordSwitchCaseID(SwitchCase *SC, unsigned ID) {
9396	assert((*CurrSwitchCaseStmts)[ID] == nullptr &&
9397	"Already have a SwitchCase with this ID");
9398	(*CurrSwitchCaseStmts)[ID] = SC;
9399	}
9400
9401	/// Retrieve the switch-case statement with the given ID.
9402	SwitchCase *ASTReader::getSwitchCaseWithID(unsigned ID) {
9403	assert((*CurrSwitchCaseStmts)[ID] != nullptr && "No SwitchCase with this ID");
9404	return (*CurrSwitchCaseStmts)[ID];
9405	}
9406
9407	void ASTReader::ClearSwitchCaseIDs() {
9408	CurrSwitchCaseStmts->clear();
9409	}
9410
9411	void ASTReader::ReadComments() {
9412	ASTContext &Context = getContext();
9413	std::vector<RawComment *> Comments;
9414	for (SmallVectorImpl<std::pair<BitstreamCursor,
9415	serialization::ModuleFile *>>::iterator
9416	I = CommentsCursors.begin(),
9417	E = CommentsCursors.end();
9418	I != E; ++I) {
9419	Comments.clear();
9420	BitstreamCursor &Cursor = I->first;
9421	serialization::ModuleFile &F = *I->second;
9422	SavedStreamPosition SavedPosition(Cursor);
9423
9424	RecordData Record;
9425	while (true) {
9426	Expected<llvm::BitstreamEntry> MaybeEntry =
9427	Cursor.advanceSkippingSubblocks(
9428	Flags: BitstreamCursor::AF_DontPopBlockAtEnd);
9429	if (!MaybeEntry) {
9430	Error(Err: MaybeEntry.takeError());
9431	return;
9432	}
9433	llvm::BitstreamEntry Entry = MaybeEntry.get();
9434
9435	switch (Entry.Kind) {
9436	case llvm::BitstreamEntry::SubBlock: // Handled for us already.
9437	case llvm::BitstreamEntry::Error:
9438	Error(Msg: "malformed block record in AST file");
9439	return;
9440	case llvm::BitstreamEntry::EndBlock:
9441	goto NextCursor;
9442	case llvm::BitstreamEntry::Record:
9443	// The interesting case.
9444	break;
9445	}
9446
9447	// Read a record.
9448	Record.clear();
9449	Expected<unsigned> MaybeComment = Cursor.readRecord(AbbrevID: Entry.ID, Vals&: Record);
9450	if (!MaybeComment) {
9451	Error(Err: MaybeComment.takeError());
9452	return;
9453	}
9454	switch ((CommentRecordTypes)MaybeComment.get()) {
9455	case COMMENTS_RAW_COMMENT: {
9456	unsigned Idx = 0;
9457	SourceRange SR = ReadSourceRange(F, Record, Idx);
9458	RawComment::CommentKind Kind =
9459	(RawComment::CommentKind) Record[Idx++];
9460	bool IsTrailingComment = Record[Idx++];
9461	bool IsAlmostTrailingComment = Record[Idx++];
9462	Comments.push_back(x: new (Context) RawComment(
9463	SR, Kind, IsTrailingComment, IsAlmostTrailingComment));
9464	break;
9465	}
9466	}
9467	}
9468	NextCursor:
9469	llvm::DenseMap<FileID, std::map<unsigned, RawComment *>>
9470	FileToOffsetToComment;
9471	for (RawComment *C : Comments) {
9472	SourceLocation CommentLoc = C->getBeginLoc();
9473	if (CommentLoc.isValid()) {
9474	std::pair<FileID, unsigned> Loc =
9475	SourceMgr.getDecomposedLoc(Loc: CommentLoc);
9476	if (Loc.first.isValid())
9477	Context.Comments.OrderedComments[Loc.first].emplace(args&: Loc.second, args&: C);
9478	}
9479	}
9480	}
9481	}
9482
9483	void ASTReader::visitInputFileInfos(
9484	serialization::ModuleFile &MF, bool IncludeSystem,
9485	llvm::function_ref<void(const serialization::InputFileInfo &IFI,
9486	bool IsSystem)>
9487	Visitor) {
9488	unsigned NumUserInputs = MF.NumUserInputFiles;
9489	unsigned NumInputs = MF.InputFilesLoaded.size();
9490	assert(NumUserInputs <= NumInputs);
9491	unsigned N = IncludeSystem ? NumInputs : NumUserInputs;
9492	for (unsigned I = 0; I < N; ++I) {
9493	bool IsSystem = I >= NumUserInputs;
9494	InputFileInfo IFI = getInputFileInfo(F&: MF, ID: I+1);
9495	Visitor(IFI, IsSystem);
9496	}
9497	}
9498
9499	void ASTReader::visitInputFiles(serialization::ModuleFile &MF,
9500	bool IncludeSystem, bool Complain,
9501	llvm::function_ref<void(const serialization::InputFile &IF,
9502	bool isSystem)> Visitor) {
9503	unsigned NumUserInputs = MF.NumUserInputFiles;
9504	unsigned NumInputs = MF.InputFilesLoaded.size();
9505	assert(NumUserInputs <= NumInputs);
9506	unsigned N = IncludeSystem ? NumInputs : NumUserInputs;
9507	for (unsigned I = 0; I < N; ++I) {
9508	bool IsSystem = I >= NumUserInputs;
9509	InputFile IF = getInputFile(F&: MF, ID: I+1, Complain);
9510	Visitor(IF, IsSystem);
9511	}
9512	}
9513
9514	void ASTReader::visitTopLevelModuleMaps(
9515	serialization::ModuleFile &MF,
9516	llvm::function_ref<void(FileEntryRef FE)> Visitor) {
9517	unsigned NumInputs = MF.InputFilesLoaded.size();
9518	for (unsigned I = 0; I < NumInputs; ++I) {
9519	InputFileInfo IFI = getInputFileInfo(F&: MF, ID: I + 1);
9520	if (IFI.TopLevel && IFI.ModuleMap)
9521	if (auto FE = getInputFile(F&: MF, ID: I + 1).getFile())
9522	Visitor(*FE);
9523	}
9524	}
9525
9526	void ASTReader::finishPendingActions() {
9527	while (
9528	!PendingIdentifierInfos.empty() || !PendingDeducedFunctionTypes.empty() ||
9529	!PendingDeducedVarTypes.empty() || !PendingIncompleteDeclChains.empty() ||
9530	!PendingDeclChains.empty() || !PendingMacroIDs.empty() ||
9531	!PendingDeclContextInfos.empty() || !PendingUpdateRecords.empty() ||
9532	!PendingObjCExtensionIvarRedeclarations.empty()) {
9533	// If any identifiers with corresponding top-level declarations have
9534	// been loaded, load those declarations now.
9535	using TopLevelDeclsMap =
9536	llvm::DenseMap<IdentifierInfo *, SmallVector<Decl *, 2>>;
9537	TopLevelDeclsMap TopLevelDecls;
9538
9539	while (!PendingIdentifierInfos.empty()) {
9540	IdentifierInfo *II = PendingIdentifierInfos.back().first;
9541	SmallVector<uint32_t, 4> DeclIDs =
9542	std::move(PendingIdentifierInfos.back().second);
9543	PendingIdentifierInfos.pop_back();
9544
9545	SetGloballyVisibleDecls(II, DeclIDs, Decls: &TopLevelDecls[II]);
9546	}
9547
9548	// Load each function type that we deferred loading because it was a
9549	// deduced type that might refer to a local type declared within itself.
9550	for (unsigned I = 0; I != PendingDeducedFunctionTypes.size(); ++I) {
9551	auto *FD = PendingDeducedFunctionTypes[I].first;
9552	FD->setType(GetType(ID: PendingDeducedFunctionTypes[I].second));
9553
9554	if (auto *DT = FD->getReturnType()->getContainedDeducedType()) {
9555	// If we gave a function a deduced return type, remember that we need to
9556	// propagate that along the redeclaration chain.
9557	if (DT->isDeduced()) {
9558	PendingDeducedTypeUpdates.insert(
9559	KV: {FD->getCanonicalDecl(), FD->getReturnType()});
9560	continue;
9561	}
9562
9563	// The function has undeduced DeduceType return type. We hope we can
9564	// find the deduced type by iterating the redecls in other modules
9565	// later.
9566	PendingUndeducedFunctionDecls.push_back(Elt: FD);
9567	continue;
9568	}
9569	}
9570	PendingDeducedFunctionTypes.clear();
9571
9572	// Load each variable type that we deferred loading because it was a
9573	// deduced type that might refer to a local type declared within itself.
9574	for (unsigned I = 0; I != PendingDeducedVarTypes.size(); ++I) {
9575	auto *VD = PendingDeducedVarTypes[I].first;
9576	VD->setType(GetType(ID: PendingDeducedVarTypes[I].second));
9577	}
9578	PendingDeducedVarTypes.clear();
9579
9580	// For each decl chain that we wanted to complete while deserializing, mark
9581	// it as "still needs to be completed".
9582	for (unsigned I = 0; I != PendingIncompleteDeclChains.size(); ++I) {
9583	markIncompleteDeclChain(D: PendingIncompleteDeclChains[I]);
9584	}
9585	PendingIncompleteDeclChains.clear();
9586
9587	// Load pending declaration chains.
9588	for (unsigned I = 0; I != PendingDeclChains.size(); ++I)
9589	loadPendingDeclChain(D: PendingDeclChains[I].first,
9590	LocalOffset: PendingDeclChains[I].second);
9591	PendingDeclChains.clear();
9592
9593	// Make the most recent of the top-level declarations visible.
9594	for (TopLevelDeclsMap::iterator TLD = TopLevelDecls.begin(),
9595	TLDEnd = TopLevelDecls.end(); TLD != TLDEnd; ++TLD) {
9596	IdentifierInfo *II = TLD->first;
9597	for (unsigned I = 0, N = TLD->second.size(); I != N; ++I) {
9598	pushExternalDeclIntoScope(D: cast<NamedDecl>(Val: TLD->second[I]), Name: II);
9599	}
9600	}
9601
9602	// Load any pending macro definitions.
9603	for (unsigned I = 0; I != PendingMacroIDs.size(); ++I) {
9604	IdentifierInfo *II = PendingMacroIDs.begin()[I].first;
9605	SmallVector<PendingMacroInfo, 2> GlobalIDs;
9606	GlobalIDs.swap(RHS&: PendingMacroIDs.begin()[I].second);
9607	// Initialize the macro history from chained-PCHs ahead of module imports.
9608	for (unsigned IDIdx = 0, NumIDs = GlobalIDs.size(); IDIdx != NumIDs;
9609	++IDIdx) {
9610	const PendingMacroInfo &Info = GlobalIDs[IDIdx];
9611	if (!Info.M->isModule())
9612	resolvePendingMacro(II, PMInfo: Info);
9613	}
9614	// Handle module imports.
9615	for (unsigned IDIdx = 0, NumIDs = GlobalIDs.size(); IDIdx != NumIDs;
9616	++IDIdx) {
9617	const PendingMacroInfo &Info = GlobalIDs[IDIdx];
9618	if (Info.M->isModule())
9619	resolvePendingMacro(II, PMInfo: Info);
9620	}
9621	}
9622	PendingMacroIDs.clear();
9623
9624	// Wire up the DeclContexts for Decls that we delayed setting until
9625	// recursive loading is completed.
9626	while (!PendingDeclContextInfos.empty()) {
9627	PendingDeclContextInfo Info = PendingDeclContextInfos.front();
9628	PendingDeclContextInfos.pop_front();
9629	DeclContext *SemaDC = cast<DeclContext>(Val: GetDecl(ID: Info.SemaDC));
9630	DeclContext *LexicalDC = cast<DeclContext>(Val: GetDecl(ID: Info.LexicalDC));
9631	Info.D->setDeclContextsImpl(SemaDC, LexicalDC, Ctx&: getContext());
9632	}
9633
9634	// Perform any pending declaration updates.
9635	while (!PendingUpdateRecords.empty()) {
9636	auto Update = PendingUpdateRecords.pop_back_val();
9637	ReadingKindTracker ReadingKind(Read_Decl, *this);
9638	loadDeclUpdateRecords(Record&: Update);
9639	}
9640
9641	while (!PendingObjCExtensionIvarRedeclarations.empty()) {
9642	auto ExtensionsPair = PendingObjCExtensionIvarRedeclarations.back().first;
9643	auto DuplicateIvars =
9644	PendingObjCExtensionIvarRedeclarations.back().second;
9645	llvm::DenseSet<std::pair<Decl *, Decl *>> NonEquivalentDecls;
9646	StructuralEquivalenceContext Ctx(
9647	ExtensionsPair.first->getASTContext(),
9648	ExtensionsPair.second->getASTContext(), NonEquivalentDecls,
9649	StructuralEquivalenceKind::Default, /*StrictTypeSpelling =*/false,
9650	/*Complain =*/false,
9651	/*ErrorOnTagTypeMismatch =*/true);
9652	if (Ctx.IsEquivalent(ExtensionsPair.first, ExtensionsPair.second)) {
9653	// Merge redeclared ivars with their predecessors.
9654	for (auto IvarPair : DuplicateIvars) {
9655	ObjCIvarDecl *Ivar = IvarPair.first, *PrevIvar = IvarPair.second;
9656	// Change semantic DeclContext but keep the lexical one.
9657	Ivar->setDeclContextsImpl(SemaDC: PrevIvar->getDeclContext(),
9658	LexicalDC: Ivar->getLexicalDeclContext(),
9659	Ctx&: getContext());
9660	getContext().setPrimaryMergedDecl(Ivar, PrevIvar->getCanonicalDecl());
9661	}
9662	// Invalidate duplicate extension and the cached ivar list.
9663	ExtensionsPair.first->setInvalidDecl();
9664	ExtensionsPair.second->getClassInterface()
9665	->getDefinition()
9666	->setIvarList(nullptr);
9667	} else {
9668	for (auto IvarPair : DuplicateIvars) {
9669	Diag(IvarPair.first->getLocation(),
9670	diag::err_duplicate_ivar_declaration)
9671	<< IvarPair.first->getIdentifier();
9672	Diag(IvarPair.second->getLocation(), diag::note_previous_definition);
9673	}
9674	}
9675	PendingObjCExtensionIvarRedeclarations.pop_back();
9676	}
9677	}
9678
9679	// At this point, all update records for loaded decls are in place, so any
9680	// fake class definitions should have become real.
9681	assert(PendingFakeDefinitionData.empty() &&
9682	"faked up a class definition but never saw the real one");
9683
9684	// If we deserialized any C++ or Objective-C class definitions, any
9685	// Objective-C protocol definitions, or any redeclarable templates, make sure
9686	// that all redeclarations point to the definitions. Note that this can only
9687	// happen now, after the redeclaration chains have been fully wired.
9688	for (Decl *D : PendingDefinitions) {
9689	if (TagDecl *TD = dyn_cast<TagDecl>(Val: D)) {
9690	if (const TagType *TagT = dyn_cast<TagType>(TD->getTypeForDecl())) {
9691	// Make sure that the TagType points at the definition.
9692	const_cast<TagType*>(TagT)->decl = TD;
9693	}
9694
9695	if (auto RD = dyn_cast<CXXRecordDecl>(Val: D)) {
9696	for (auto *R = getMostRecentExistingDecl(RD); R;
9697	R = R->getPreviousDecl()) {
9698	assert((R == D) ==
9699	cast<CXXRecordDecl>(R)->isThisDeclarationADefinition() &&
9700	"declaration thinks it's the definition but it isn't");
9701	cast<CXXRecordDecl>(R)->DefinitionData = RD->DefinitionData;
9702	}
9703	}
9704
9705	continue;
9706	}
9707
9708	if (auto ID = dyn_cast<ObjCInterfaceDecl>(Val: D)) {
9709	// Make sure that the ObjCInterfaceType points at the definition.
9710	const_cast<ObjCInterfaceType *>(cast<ObjCInterfaceType>(Val: ID->TypeForDecl))
9711	->Decl = ID;
9712
9713	for (auto *R = getMostRecentExistingDecl(ID); R; R = R->getPreviousDecl())
9714	cast<ObjCInterfaceDecl>(R)->Data = ID->Data;
9715
9716	continue;
9717	}
9718
9719	if (auto PD = dyn_cast<ObjCProtocolDecl>(Val: D)) {
9720	for (auto *R = getMostRecentExistingDecl(PD); R; R = R->getPreviousDecl())
9721	cast<ObjCProtocolDecl>(R)->Data = PD->Data;
9722
9723	continue;
9724	}
9725
9726	auto RTD = cast<RedeclarableTemplateDecl>(Val: D)->getCanonicalDecl();
9727	for (auto *R = getMostRecentExistingDecl(RTD); R; R = R->getPreviousDecl())
9728	cast<RedeclarableTemplateDecl>(R)->Common = RTD->Common;
9729	}
9730	PendingDefinitions.clear();
9731
9732	// Load the bodies of any functions or methods we've encountered. We do
9733	// this now (delayed) so that we can be sure that the declaration chains
9734	// have been fully wired up (hasBody relies on this).
9735	// FIXME: We shouldn't require complete redeclaration chains here.
9736	for (PendingBodiesMap::iterator PB = PendingBodies.begin(),
9737	PBEnd = PendingBodies.end();
9738	PB != PBEnd; ++PB) {
9739	if (FunctionDecl *FD = dyn_cast<FunctionDecl>(Val: PB->first)) {
9740	// For a function defined inline within a class template, force the
9741	// canonical definition to be the one inside the canonical definition of
9742	// the template. This ensures that we instantiate from a correct view
9743	// of the template.
9744	//
9745	// Sadly we can't do this more generally: we can't be sure that all
9746	// copies of an arbitrary class definition will have the same members
9747	// defined (eg, some member functions may not be instantiated, and some
9748	// special members may or may not have been implicitly defined).
9749	if (auto *RD = dyn_cast<CXXRecordDecl>(FD->getLexicalParent()))
9750	if (RD->isDependentContext() && !RD->isThisDeclarationADefinition())
9751	continue;
9752
9753	// FIXME: Check for =delete/=default?
9754	const FunctionDecl *Defn = nullptr;
9755	if (!getContext().getLangOpts().Modules || !FD->hasBody(Definition&: Defn)) {
9756	FD->setLazyBody(PB->second);
9757	} else {
9758	auto *NonConstDefn = const_cast<FunctionDecl*>(Defn);
9759	mergeDefinitionVisibility(NonConstDefn, FD);
9760
9761	if (!FD->isLateTemplateParsed() &&
9762	!NonConstDefn->isLateTemplateParsed() &&
9763	// We only perform ODR checks for decls not in the explicit
9764	// global module fragment.
9765	!shouldSkipCheckingODR(FD) &&
9766	FD->getODRHash() != NonConstDefn->getODRHash()) {
9767	if (!isa<CXXMethodDecl>(Val: FD)) {
9768	PendingFunctionOdrMergeFailures[FD].push_back(Elt: NonConstDefn);
9769	} else if (FD->getLexicalParent()->isFileContext() &&
9770	NonConstDefn->getLexicalParent()->isFileContext()) {
9771	// Only diagnose out-of-line method definitions. If they are
9772	// in class definitions, then an error will be generated when
9773	// processing the class bodies.
9774	PendingFunctionOdrMergeFailures[FD].push_back(Elt: NonConstDefn);
9775	}
9776	}
9777	}
9778	continue;
9779	}
9780
9781	ObjCMethodDecl *MD = cast<ObjCMethodDecl>(Val: PB->first);
9782	if (!getContext().getLangOpts().Modules || !MD->hasBody())
9783	MD->setLazyBody(PB->second);
9784	}
9785	PendingBodies.clear();
9786
9787	// Inform any classes that had members added that they now have more members.
9788	for (auto [RD, MD] : PendingAddedClassMembers) {
9789	RD->addedMember(D: MD);
9790	}
9791	PendingAddedClassMembers.clear();
9792
9793	// Do some cleanup.
9794	for (auto *ND : PendingMergedDefinitionsToDeduplicate)
9795	getContext().deduplicateMergedDefinitonsFor(ND);
9796	PendingMergedDefinitionsToDeduplicate.clear();
9797	}
9798
9799	void ASTReader::diagnoseOdrViolations() {
9800	if (PendingOdrMergeFailures.empty() && PendingOdrMergeChecks.empty() &&
9801	PendingRecordOdrMergeFailures.empty() &&
9802	PendingFunctionOdrMergeFailures.empty() &&
9803	PendingEnumOdrMergeFailures.empty() &&
9804	PendingObjCInterfaceOdrMergeFailures.empty() &&
9805	PendingObjCProtocolOdrMergeFailures.empty())
9806	return;
9807
9808	// Trigger the import of the full definition of each class that had any
9809	// odr-merging problems, so we can produce better diagnostics for them.
9810	// These updates may in turn find and diagnose some ODR failures, so take
9811	// ownership of the set first.
9812	auto OdrMergeFailures = std::move(PendingOdrMergeFailures);
9813	PendingOdrMergeFailures.clear();
9814	for (auto &Merge : OdrMergeFailures) {
9815	Merge.first->buildLookup();
9816	Merge.first->decls_begin();
9817	Merge.first->bases_begin();
9818	Merge.first->vbases_begin();
9819	for (auto &RecordPair : Merge.second) {
9820	auto *RD = RecordPair.first;
9821	RD->decls_begin();
9822	RD->bases_begin();
9823	RD->vbases_begin();
9824	}
9825	}
9826
9827	// Trigger the import of the full definition of each record in C/ObjC.
9828	auto RecordOdrMergeFailures = std::move(PendingRecordOdrMergeFailures);
9829	PendingRecordOdrMergeFailures.clear();
9830	for (auto &Merge : RecordOdrMergeFailures) {
9831	Merge.first->decls_begin();
9832	for (auto &D : Merge.second)
9833	D->decls_begin();
9834	}
9835
9836	// Trigger the import of the full interface definition.
9837	auto ObjCInterfaceOdrMergeFailures =
9838	std::move(PendingObjCInterfaceOdrMergeFailures);
9839	PendingObjCInterfaceOdrMergeFailures.clear();
9840	for (auto &Merge : ObjCInterfaceOdrMergeFailures) {
9841	Merge.first->decls_begin();
9842	for (auto &InterfacePair : Merge.second)
9843	InterfacePair.first->decls_begin();
9844	}
9845
9846	// Trigger the import of functions.
9847	auto FunctionOdrMergeFailures = std::move(PendingFunctionOdrMergeFailures);
9848	PendingFunctionOdrMergeFailures.clear();
9849	for (auto &Merge : FunctionOdrMergeFailures) {
9850	Merge.first->buildLookup();
9851	Merge.first->decls_begin();
9852	Merge.first->getBody();
9853	for (auto &FD : Merge.second) {
9854	FD->buildLookup();
9855	FD->decls_begin();
9856	FD->getBody();
9857	}
9858	}
9859
9860	// Trigger the import of enums.
9861	auto EnumOdrMergeFailures = std::move(PendingEnumOdrMergeFailures);
9862	PendingEnumOdrMergeFailures.clear();
9863	for (auto &Merge : EnumOdrMergeFailures) {
9864	Merge.first->decls_begin();
9865	for (auto &Enum : Merge.second) {
9866	Enum->decls_begin();
9867	}
9868	}
9869
9870	// Trigger the import of the full protocol definition.
9871	auto ObjCProtocolOdrMergeFailures =
9872	std::move(PendingObjCProtocolOdrMergeFailures);
9873	PendingObjCProtocolOdrMergeFailures.clear();
9874	for (auto &Merge : ObjCProtocolOdrMergeFailures) {
9875	Merge.first->decls_begin();
9876	for (auto &ProtocolPair : Merge.second)
9877	ProtocolPair.first->decls_begin();
9878	}
9879
9880	// For each declaration from a merged context, check that the canonical
9881	// definition of that context also contains a declaration of the same
9882	// entity.
9883	//
9884	// Caution: this loop does things that might invalidate iterators into
9885	// PendingOdrMergeChecks. Don't turn this into a range-based for loop!
9886	while (!PendingOdrMergeChecks.empty()) {
9887	NamedDecl *D = PendingOdrMergeChecks.pop_back_val();
9888
9889	// FIXME: Skip over implicit declarations for now. This matters for things
9890	// like implicitly-declared special member functions. This isn't entirely
9891	// correct; we can end up with multiple unmerged declarations of the same
9892	// implicit entity.
9893	if (D->isImplicit())
9894	continue;
9895
9896	DeclContext *CanonDef = D->getDeclContext();
9897
9898	bool Found = false;
9899	const Decl *DCanon = D->getCanonicalDecl();
9900
9901	for (auto *RI : D->redecls()) {
9902	if (RI->getLexicalDeclContext() == CanonDef) {
9903	Found = true;
9904	break;
9905	}
9906	}
9907	if (Found)
9908	continue;
9909
9910	// Quick check failed, time to do the slow thing. Note, we can't just
9911	// look up the name of D in CanonDef here, because the member that is
9912	// in CanonDef might not be found by name lookup (it might have been
9913	// replaced by a more recent declaration in the lookup table), and we
9914	// can't necessarily find it in the redeclaration chain because it might
9915	// be merely mergeable, not redeclarable.
9916	llvm::SmallVector<const NamedDecl*, 4> Candidates;
9917	for (auto *CanonMember : CanonDef->decls()) {
9918	if (CanonMember->getCanonicalDecl() == DCanon) {
9919	// This can happen if the declaration is merely mergeable and not
9920	// actually redeclarable (we looked for redeclarations earlier).
9921	//
9922	// FIXME: We should be able to detect this more efficiently, without
9923	// pulling in all of the members of CanonDef.
9924	Found = true;
9925	break;
9926	}
9927	if (auto *ND = dyn_cast<NamedDecl>(CanonMember))
9928	if (ND->getDeclName() == D->getDeclName())
9929	Candidates.push_back(ND);
9930	}
9931
9932	if (!Found) {
9933	// The AST doesn't like TagDecls becoming invalid after they've been
9934	// completed. We only really need to mark FieldDecls as invalid here.
9935	if (!isa<TagDecl>(Val: D))
9936	D->setInvalidDecl();
9937
9938	// Ensure we don't accidentally recursively enter deserialization while
9939	// we're producing our diagnostic.
9940	Deserializing RecursionGuard(this);
9941
9942	std::string CanonDefModule =
9943	ODRDiagsEmitter::getOwningModuleNameForDiagnostic(
9944	D: cast<Decl>(Val: CanonDef));
9945	Diag(D->getLocation(), diag::err_module_odr_violation_missing_decl)
9946	<< D << ODRDiagsEmitter::getOwningModuleNameForDiagnostic(D)
9947	<< CanonDef << CanonDefModule.empty() << CanonDefModule;
9948
9949	if (Candidates.empty())
9950	Diag(cast<Decl>(CanonDef)->getLocation(),
9951	diag::note_module_odr_violation_no_possible_decls) << D;
9952	else {
9953	for (unsigned I = 0, N = Candidates.size(); I != N; ++I)
9954	Diag(Candidates[I]->getLocation(),
9955	diag::note_module_odr_violation_possible_decl)
9956	<< Candidates[I];
9957	}
9958
9959	DiagnosedOdrMergeFailures.insert(Ptr: CanonDef);
9960	}
9961	}
9962
9963	if (OdrMergeFailures.empty() && RecordOdrMergeFailures.empty() &&
9964	FunctionOdrMergeFailures.empty() && EnumOdrMergeFailures.empty() &&
9965	ObjCInterfaceOdrMergeFailures.empty() &&
9966	ObjCProtocolOdrMergeFailures.empty())
9967	return;
9968
9969	ODRDiagsEmitter DiagsEmitter(Diags, getContext(),
9970	getPreprocessor().getLangOpts());
9971
9972	// Issue any pending ODR-failure diagnostics.
9973	for (auto &Merge : OdrMergeFailures) {
9974	// If we've already pointed out a specific problem with this class, don't
9975	// bother issuing a general "something's different" diagnostic.
9976	if (!DiagnosedOdrMergeFailures.insert(Merge.first).second)
9977	continue;
9978
9979	bool Diagnosed = false;
9980	CXXRecordDecl *FirstRecord = Merge.first;
9981	for (auto &RecordPair : Merge.second) {
9982	if (DiagsEmitter.diagnoseMismatch(FirstRecord, SecondRecord: RecordPair.first,
9983	SecondDD: RecordPair.second)) {
9984	Diagnosed = true;
9985	break;
9986	}
9987	}
9988
9989	if (!Diagnosed) {
9990	// All definitions are updates to the same declaration. This happens if a
9991	// module instantiates the declaration of a class template specialization
9992	// and two or more other modules instantiate its definition.
9993	//
9994	// FIXME: Indicate which modules had instantiations of this definition.
9995	// FIXME: How can this even happen?
9996	Diag(Merge.first->getLocation(),
9997	diag::err_module_odr_violation_different_instantiations)
9998	<< Merge.first;
9999	}
10000	}
10001
10002	// Issue any pending ODR-failure diagnostics for RecordDecl in C/ObjC. Note
10003	// that in C++ this is done as a part of CXXRecordDecl ODR checking.
10004	for (auto &Merge : RecordOdrMergeFailures) {
10005	// If we've already pointed out a specific problem with this class, don't
10006	// bother issuing a general "something's different" diagnostic.
10007	if (!DiagnosedOdrMergeFailures.insert(Merge.first).second)
10008	continue;
10009
10010	RecordDecl *FirstRecord = Merge.first;
10011	bool Diagnosed = false;
10012	for (auto *SecondRecord : Merge.second) {
10013	if (DiagsEmitter.diagnoseMismatch(FirstRecord, SecondRecord)) {
10014	Diagnosed = true;
10015	break;
10016	}
10017	}
10018	(void)Diagnosed;
10019	assert(Diagnosed && "Unable to emit ODR diagnostic.");
10020	}
10021
10022	// Issue ODR failures diagnostics for functions.
10023	for (auto &Merge : FunctionOdrMergeFailures) {
10024	FunctionDecl *FirstFunction = Merge.first;
10025	bool Diagnosed = false;
10026	for (auto &SecondFunction : Merge.second) {
10027	if (DiagsEmitter.diagnoseMismatch(FirstFunction, SecondFunction)) {
10028	Diagnosed = true;
10029	break;
10030	}
10031	}
10032	(void)Diagnosed;
10033	assert(Diagnosed && "Unable to emit ODR diagnostic.");
10034	}
10035
10036	// Issue ODR failures diagnostics for enums.
10037	for (auto &Merge : EnumOdrMergeFailures) {
10038	// If we've already pointed out a specific problem with this enum, don't
10039	// bother issuing a general "something's different" diagnostic.
10040	if (!DiagnosedOdrMergeFailures.insert(Merge.first).second)
10041	continue;
10042
10043	EnumDecl *FirstEnum = Merge.first;
10044	bool Diagnosed = false;
10045	for (auto &SecondEnum : Merge.second) {
10046	if (DiagsEmitter.diagnoseMismatch(FirstEnum, SecondEnum)) {
10047	Diagnosed = true;
10048	break;
10049	}
10050	}
10051	(void)Diagnosed;
10052	assert(Diagnosed && "Unable to emit ODR diagnostic.");
10053	}
10054
10055	for (auto &Merge : ObjCInterfaceOdrMergeFailures) {
10056	// If we've already pointed out a specific problem with this interface,
10057	// don't bother issuing a general "something's different" diagnostic.
10058	if (!DiagnosedOdrMergeFailures.insert(Merge.first).second)
10059	continue;
10060
10061	bool Diagnosed = false;
10062	ObjCInterfaceDecl *FirstID = Merge.first;
10063	for (auto &InterfacePair : Merge.second) {
10064	if (DiagsEmitter.diagnoseMismatch(FirstID, SecondID: InterfacePair.first,
10065	SecondDD: InterfacePair.second)) {
10066	Diagnosed = true;
10067	break;
10068	}
10069	}
10070	(void)Diagnosed;
10071	assert(Diagnosed && "Unable to emit ODR diagnostic.");
10072	}
10073
10074	for (auto &Merge : ObjCProtocolOdrMergeFailures) {
10075	// If we've already pointed out a specific problem with this protocol,
10076	// don't bother issuing a general "something's different" diagnostic.
10077	if (!DiagnosedOdrMergeFailures.insert(Merge.first).second)
10078	continue;
10079
10080	ObjCProtocolDecl *FirstProtocol = Merge.first;
10081	bool Diagnosed = false;
10082	for (auto &ProtocolPair : Merge.second) {
10083	if (DiagsEmitter.diagnoseMismatch(FirstProtocol, SecondProtocol: ProtocolPair.first,
10084	SecondDD: ProtocolPair.second)) {
10085	Diagnosed = true;
10086	break;
10087	}
10088	}
10089	(void)Diagnosed;
10090	assert(Diagnosed && "Unable to emit ODR diagnostic.");
10091	}
10092	}
10093
10094	void ASTReader::StartedDeserializing() {
10095	if (++NumCurrentElementsDeserializing == 1 && ReadTimer.get())
10096	ReadTimer->startTimer();
10097	}
10098
10099	void ASTReader::FinishedDeserializing() {
10100	assert(NumCurrentElementsDeserializing &&
10101	"FinishedDeserializing not paired with StartedDeserializing");
10102	if (NumCurrentElementsDeserializing == 1) {
10103	// We decrease NumCurrentElementsDeserializing only after pending actions
10104	// are finished, to avoid recursively re-calling finishPendingActions().
10105	finishPendingActions();
10106	}
10107	--NumCurrentElementsDeserializing;
10108
10109	if (NumCurrentElementsDeserializing == 0) {
10110	// Propagate exception specification and deduced type updates along
10111	// redeclaration chains.
10112	//
10113	// We do this now rather than in finishPendingActions because we want to
10114	// be able to walk the complete redeclaration chains of the updated decls.
10115	while (!PendingExceptionSpecUpdates.empty() ||
10116	!PendingDeducedTypeUpdates.empty()) {
10117	auto ESUpdates = std::move(PendingExceptionSpecUpdates);
10118	PendingExceptionSpecUpdates.clear();
10119	for (auto Update : ESUpdates) {
10120	ProcessingUpdatesRAIIObj ProcessingUpdates(*this);
10121	auto *FPT = Update.second->getType()->castAs<FunctionProtoType>();
10122	auto ESI = FPT->getExtProtoInfo().ExceptionSpec;
10123	if (auto *Listener = getContext().getASTMutationListener())
10124	Listener->ResolvedExceptionSpec(FD: cast<FunctionDecl>(Val: Update.second));
10125	for (auto *Redecl : Update.second->redecls())
10126	getContext().adjustExceptionSpec(cast<FunctionDecl>(Redecl), ESI);
10127	}
10128
10129	auto DTUpdates = std::move(PendingDeducedTypeUpdates);
10130	PendingDeducedTypeUpdates.clear();
10131	for (auto Update : DTUpdates) {
10132	ProcessingUpdatesRAIIObj ProcessingUpdates(*this);
10133	// FIXME: If the return type is already deduced, check that it matches.
10134	getContext().adjustDeducedFunctionResultType(FD: Update.first,
10135	ResultType: Update.second);
10136	}
10137
10138	auto UDTUpdates = std::move(PendingUndeducedFunctionDecls);
10139	PendingUndeducedFunctionDecls.clear();
10140	// We hope we can find the deduced type for the functions by iterating
10141	// redeclarations in other modules.
10142	for (FunctionDecl *UndeducedFD : UDTUpdates)
10143	(void)UndeducedFD->getMostRecentDecl();
10144	}
10145
10146	if (ReadTimer)
10147	ReadTimer->stopTimer();
10148
10149	diagnoseOdrViolations();
10150
10151	// We are not in recursive loading, so it's safe to pass the "interesting"
10152	// decls to the consumer.
10153	if (Consumer)
10154	PassInterestingDeclsToConsumer();
10155	}
10156	}
10157
10158	void ASTReader::pushExternalDeclIntoScope(NamedDecl *D, DeclarationName Name) {
10159	if (IdentifierInfo *II = Name.getAsIdentifierInfo()) {
10160	// Remove any fake results before adding any real ones.
10161	auto It = PendingFakeLookupResults.find(Key: II);
10162	if (It != PendingFakeLookupResults.end()) {
10163	for (auto *ND : It->second)
10164	SemaObj->IdResolver.RemoveDecl(D: ND);
10165	// FIXME: this works around module+PCH performance issue.
10166	// Rather than erase the result from the map, which is O(n), just clear
10167	// the vector of NamedDecls.
10168	It->second.clear();
10169	}
10170	}
10171
10172	if (SemaObj->IdResolver.tryAddTopLevelDecl(D, Name) && SemaObj->TUScope) {
10173	SemaObj->TUScope->AddDecl(D);
10174	} else if (SemaObj->TUScope) {
10175	// Adding the decl to IdResolver may have failed because it was already in
10176	// (even though it was not added in scope). If it is already in, make sure
10177	// it gets in the scope as well.
10178	if (llvm::is_contained(Range: SemaObj->IdResolver.decls(Name), Element: D))
10179	SemaObj->TUScope->AddDecl(D);
10180	}
10181	}
10182
10183	ASTReader::ASTReader(Preprocessor &PP, InMemoryModuleCache &ModuleCache,
10184	ASTContext *Context,
10185	const PCHContainerReader &PCHContainerRdr,
10186	ArrayRef<std::shared_ptr<ModuleFileExtension>> Extensions,
10187	StringRef isysroot,
10188	DisableValidationForModuleKind DisableValidationKind,
10189	bool AllowASTWithCompilerErrors,
10190	bool AllowConfigurationMismatch, bool ValidateSystemInputs,
10191	bool ValidateASTInputFilesContent, bool UseGlobalIndex,
10192	std::unique_ptr<llvm::Timer> ReadTimer)
10193	: Listener(bool(DisableValidationKind &DisableValidationForModuleKind::PCH)
10194	? cast<ASTReaderListener>(Val: new SimpleASTReaderListener(PP))
10195	: cast<ASTReaderListener>(Val: new PCHValidator(PP, *this))),
10196	SourceMgr(PP.getSourceManager()), FileMgr(PP.getFileManager()),
10197	PCHContainerRdr(PCHContainerRdr), Diags(PP.getDiagnostics()), PP(PP),
10198	ContextObj(Context), ModuleMgr(PP.getFileManager(), ModuleCache,
10199	PCHContainerRdr, PP.getHeaderSearchInfo()),
10200	DummyIdResolver(PP), ReadTimer(std::move(ReadTimer)), isysroot(isysroot),
10201	DisableValidationKind(DisableValidationKind),
10202	AllowASTWithCompilerErrors(AllowASTWithCompilerErrors),
10203	AllowConfigurationMismatch(AllowConfigurationMismatch),
10204	ValidateSystemInputs(ValidateSystemInputs),
10205	ValidateASTInputFilesContent(ValidateASTInputFilesContent),
10206	UseGlobalIndex(UseGlobalIndex), CurrSwitchCaseStmts(&SwitchCaseStmts) {
10207	SourceMgr.setExternalSLocEntrySource(this);
10208
10209	for (const auto &Ext : Extensions) {
10210	auto BlockName = Ext->getExtensionMetadata().BlockName;
10211	auto Known = ModuleFileExtensions.find(Key: BlockName);
10212	if (Known != ModuleFileExtensions.end()) {
10213	Diags.Report(diag::warn_duplicate_module_file_extension)
10214	<< BlockName;
10215	continue;
10216	}
10217
10218	ModuleFileExtensions.insert(KV: {BlockName, Ext});
10219	}
10220	}
10221
10222	ASTReader::~ASTReader() {
10223	if (OwnsDeserializationListener)
10224	delete DeserializationListener;
10225	}
10226
10227	IdentifierResolver &ASTReader::getIdResolver() {
10228	return SemaObj ? SemaObj->IdResolver : DummyIdResolver;
10229	}
10230
10231	Expected<unsigned> ASTRecordReader::readRecord(llvm::BitstreamCursor &Cursor,
10232	unsigned AbbrevID) {
10233	Idx = 0;
10234	Record.clear();
10235	return Cursor.readRecord(AbbrevID, Vals&: Record);
10236	}
10237	//===----------------------------------------------------------------------===//
10238	//// OMPClauseReader implementation
10239	////===----------------------------------------------------------------------===//
10240
10241	// This has to be in namespace clang because it's friended by all
10242	// of the OMP clauses.
10243	namespace clang {
10244
10245	class OMPClauseReader : public OMPClauseVisitor<OMPClauseReader> {
10246	ASTRecordReader &Record;
10247	ASTContext &Context;
10248
10249	public:
10250	OMPClauseReader(ASTRecordReader &Record)
10251	: Record(Record), Context(Record.getContext()) {}
10252	#define GEN_CLANG_CLAUSE_CLASS
10253	#define CLAUSE_CLASS(Enum, Str, Class) void Visit##Class(Class *C);
10254	#include "llvm/Frontend/OpenMP/OMP.inc"
10255	OMPClause *readClause();
10256	void VisitOMPClauseWithPreInit(OMPClauseWithPreInit *C);
10257	void VisitOMPClauseWithPostUpdate(OMPClauseWithPostUpdate *C);
10258	};
10259
10260	} // end namespace clang
10261
10262	OMPClause *ASTRecordReader::readOMPClause() {
10263	return OMPClauseReader(*this).readClause();
10264	}
10265
10266	OMPClause *OMPClauseReader::readClause() {
10267	OMPClause *C = nullptr;
10268	switch (llvm::omp::Clause(Record.readInt())) {
10269	case llvm::omp::OMPC_if:
10270	C = new (Context) OMPIfClause();
10271	break;
10272	case llvm::omp::OMPC_final:
10273	C = new (Context) OMPFinalClause();
10274	break;
10275	case llvm::omp::OMPC_num_threads:
10276	C = new (Context) OMPNumThreadsClause();
10277	break;
10278	case llvm::omp::OMPC_safelen:
10279	C = new (Context) OMPSafelenClause();
10280	break;
10281	case llvm::omp::OMPC_simdlen:
10282	C = new (Context) OMPSimdlenClause();
10283	break;
10284	case llvm::omp::OMPC_sizes: {
10285	unsigned NumSizes = Record.readInt();
10286	C = OMPSizesClause::CreateEmpty(C: Context, NumSizes);
10287	break;
10288	}
10289	case llvm::omp::OMPC_full:
10290	C = OMPFullClause::CreateEmpty(C: Context);
10291	break;
10292	case llvm::omp::OMPC_partial:
10293	C = OMPPartialClause::CreateEmpty(C: Context);
10294	break;
10295	case llvm::omp::OMPC_allocator:
10296	C = new (Context) OMPAllocatorClause();
10297	break;
10298	case llvm::omp::OMPC_collapse:
10299	C = new (Context) OMPCollapseClause();
10300	break;
10301	case llvm::omp::OMPC_default:
10302	C = new (Context) OMPDefaultClause();
10303	break;
10304	case llvm::omp::OMPC_proc_bind:
10305	C = new (Context) OMPProcBindClause();
10306	break;
10307	case llvm::omp::OMPC_schedule:
10308	C = new (Context) OMPScheduleClause();
10309	break;
10310	case llvm::omp::OMPC_ordered:
10311	C = OMPOrderedClause::CreateEmpty(C: Context, NumLoops: Record.readInt());
10312	break;
10313	case llvm::omp::OMPC_nowait:
10314	C = new (Context) OMPNowaitClause();
10315	break;
10316	case llvm::omp::OMPC_untied:
10317	C = new (Context) OMPUntiedClause();
10318	break;
10319	case llvm::omp::OMPC_mergeable:
10320	C = new (Context) OMPMergeableClause();
10321	break;
10322	case llvm::omp::OMPC_read:
10323	C = new (Context) OMPReadClause();
10324	break;
10325	case llvm::omp::OMPC_write:
10326	C = new (Context) OMPWriteClause();
10327	break;
10328	case llvm::omp::OMPC_update:
10329	C = OMPUpdateClause::CreateEmpty(C: Context, IsExtended: Record.readInt());
10330	break;
10331	case llvm::omp::OMPC_capture:
10332	C = new (Context) OMPCaptureClause();
10333	break;
10334	case llvm::omp::OMPC_compare:
10335	C = new (Context) OMPCompareClause();
10336	break;
10337	case llvm::omp::OMPC_fail:
10338	C = new (Context) OMPFailClause();
10339	break;
10340	case llvm::omp::OMPC_seq_cst:
10341	C = new (Context) OMPSeqCstClause();
10342	break;
10343	case llvm::omp::OMPC_acq_rel:
10344	C = new (Context) OMPAcqRelClause();
10345	break;
10346	case llvm::omp::OMPC_acquire:
10347	C = new (Context) OMPAcquireClause();
10348	break;
10349	case llvm::omp::OMPC_release:
10350	C = new (Context) OMPReleaseClause();
10351	break;
10352	case llvm::omp::OMPC_relaxed:
10353	C = new (Context) OMPRelaxedClause();
10354	break;
10355	case llvm::omp::OMPC_weak:
10356	C = new (Context) OMPWeakClause();
10357	break;
10358	case llvm::omp::OMPC_threads:
10359	C = new (Context) OMPThreadsClause();
10360	break;
10361	case llvm::omp::OMPC_simd:
10362	C = new (Context) OMPSIMDClause();
10363	break;
10364	case llvm::omp::OMPC_nogroup:
10365	C = new (Context) OMPNogroupClause();
10366	break;
10367	case llvm::omp::OMPC_unified_address:
10368	C = new (Context) OMPUnifiedAddressClause();
10369	break;
10370	case llvm::omp::OMPC_unified_shared_memory:
10371	C = new (Context) OMPUnifiedSharedMemoryClause();
10372	break;
10373	case llvm::omp::OMPC_reverse_offload:
10374	C = new (Context) OMPReverseOffloadClause();
10375	break;
10376	case llvm::omp::OMPC_dynamic_allocators:
10377	C = new (Context) OMPDynamicAllocatorsClause();
10378	break;
10379	case llvm::omp::OMPC_atomic_default_mem_order:
10380	C = new (Context) OMPAtomicDefaultMemOrderClause();
10381	break;
10382	case llvm::omp::OMPC_at:
10383	C = new (Context) OMPAtClause();
10384	break;
10385	case llvm::omp::OMPC_severity:
10386	C = new (Context) OMPSeverityClause();
10387	break;
10388	case llvm::omp::OMPC_message:
10389	C = new (Context) OMPMessageClause();
10390	break;
10391	case llvm::omp::OMPC_private:
10392	C = OMPPrivateClause::CreateEmpty(C: Context, N: Record.readInt());
10393	break;
10394	case llvm::omp::OMPC_firstprivate:
10395	C = OMPFirstprivateClause::CreateEmpty(C: Context, N: Record.readInt());
10396	break;
10397	case llvm::omp::OMPC_lastprivate:
10398	C = OMPLastprivateClause::CreateEmpty(C: Context, N: Record.readInt());
10399	break;
10400	case llvm::omp::OMPC_shared:
10401	C = OMPSharedClause::CreateEmpty(C: Context, N: Record.readInt());
10402	break;
10403	case llvm::omp::OMPC_reduction: {
10404	unsigned N = Record.readInt();
10405	auto Modifier = Record.readEnum<OpenMPReductionClauseModifier>();
10406	C = OMPReductionClause::CreateEmpty(C: Context, N, Modifier: Modifier);
10407	break;
10408	}
10409	case llvm::omp::OMPC_task_reduction:
10410	C = OMPTaskReductionClause::CreateEmpty(C: Context, N: Record.readInt());
10411	break;
10412	case llvm::omp::OMPC_in_reduction:
10413	C = OMPInReductionClause::CreateEmpty(C: Context, N: Record.readInt());
10414	break;
10415	case llvm::omp::OMPC_linear:
10416	C = OMPLinearClause::CreateEmpty(C: Context, NumVars: Record.readInt());
10417	break;
10418	case llvm::omp::OMPC_aligned:
10419	C = OMPAlignedClause::CreateEmpty(C: Context, NumVars: Record.readInt());
10420	break;
10421	case llvm::omp::OMPC_copyin:
10422	C = OMPCopyinClause::CreateEmpty(C: Context, N: Record.readInt());
10423	break;
10424	case llvm::omp::OMPC_copyprivate:
10425	C = OMPCopyprivateClause::CreateEmpty(C: Context, N: Record.readInt());
10426	break;
10427	case llvm::omp::OMPC_flush:
10428	C = OMPFlushClause::CreateEmpty(C: Context, N: Record.readInt());
10429	break;
10430	case llvm::omp::OMPC_depobj:
10431	C = OMPDepobjClause::CreateEmpty(C: Context);
10432	break;
10433	case llvm::omp::OMPC_depend: {
10434	unsigned NumVars = Record.readInt();
10435	unsigned NumLoops = Record.readInt();
10436	C = OMPDependClause::CreateEmpty(C: Context, N: NumVars, NumLoops);
10437	break;
10438	}
10439	case llvm::omp::OMPC_device:
10440	C = new (Context) OMPDeviceClause();
10441	break;
10442	case llvm::omp::OMPC_map: {
10443	OMPMappableExprListSizeTy Sizes;
10444	Sizes.NumVars = Record.readInt();
10445	Sizes.NumUniqueDeclarations = Record.readInt();
10446	Sizes.NumComponentLists = Record.readInt();
10447	Sizes.NumComponents = Record.readInt();
10448	C = OMPMapClause::CreateEmpty(C: Context, Sizes);
10449	break;
10450	}
10451	case llvm::omp::OMPC_num_teams:
10452	C = new (Context) OMPNumTeamsClause();
10453	break;
10454	case llvm::omp::OMPC_thread_limit:
10455	C = new (Context) OMPThreadLimitClause();
10456	break;
10457	case llvm::omp::OMPC_priority:
10458	C = new (Context) OMPPriorityClause();
10459	break;
10460	case llvm::omp::OMPC_grainsize:
10461	C = new (Context) OMPGrainsizeClause();
10462	break;
10463	case llvm::omp::OMPC_num_tasks:
10464	C = new (Context) OMPNumTasksClause();
10465	break;
10466	case llvm::omp::OMPC_hint:
10467	C = new (Context) OMPHintClause();
10468	break;
10469	case llvm::omp::OMPC_dist_schedule:
10470	C = new (Context) OMPDistScheduleClause();
10471	break;
10472	case llvm::omp::OMPC_defaultmap:
10473	C = new (Context) OMPDefaultmapClause();
10474	break;
10475	case llvm::omp::OMPC_to: {
10476	OMPMappableExprListSizeTy Sizes;
10477	Sizes.NumVars = Record.readInt();
10478	Sizes.NumUniqueDeclarations = Record.readInt();
10479	Sizes.NumComponentLists = Record.readInt();
10480	Sizes.NumComponents = Record.readInt();
10481	C = OMPToClause::CreateEmpty(C: Context, Sizes);
10482	break;
10483	}
10484	case llvm::omp::OMPC_from: {
10485	OMPMappableExprListSizeTy Sizes;
10486	Sizes.NumVars = Record.readInt();
10487	Sizes.NumUniqueDeclarations = Record.readInt();
10488	Sizes.NumComponentLists = Record.readInt();
10489	Sizes.NumComponents = Record.readInt();
10490	C = OMPFromClause::CreateEmpty(C: Context, Sizes);
10491	break;
10492	}
10493	case llvm::omp::OMPC_use_device_ptr: {
10494	OMPMappableExprListSizeTy Sizes;
10495	Sizes.NumVars = Record.readInt();
10496	Sizes.NumUniqueDeclarations = Record.readInt();
10497	Sizes.NumComponentLists = Record.readInt();
10498	Sizes.NumComponents = Record.readInt();
10499	C = OMPUseDevicePtrClause::CreateEmpty(C: Context, Sizes);
10500	break;
10501	}
10502	case llvm::omp::OMPC_use_device_addr: {
10503	OMPMappableExprListSizeTy Sizes;
10504	Sizes.NumVars = Record.readInt();
10505	Sizes.NumUniqueDeclarations = Record.readInt();
10506	Sizes.NumComponentLists = Record.readInt();
10507	Sizes.NumComponents = Record.readInt();
10508	C = OMPUseDeviceAddrClause::CreateEmpty(C: Context, Sizes);
10509	break;
10510	}
10511	case llvm::omp::OMPC_is_device_ptr: {
10512	OMPMappableExprListSizeTy Sizes;
10513	Sizes.NumVars = Record.readInt();
10514	Sizes.NumUniqueDeclarations = Record.readInt();
10515	Sizes.NumComponentLists = Record.readInt();
10516	Sizes.NumComponents = Record.readInt();
10517	C = OMPIsDevicePtrClause::CreateEmpty(C: Context, Sizes);
10518	break;
10519	}
10520	case llvm::omp::OMPC_has_device_addr: {
10521	OMPMappableExprListSizeTy Sizes;
10522	Sizes.NumVars = Record.readInt();
10523	Sizes.NumUniqueDeclarations = Record.readInt();
10524	Sizes.NumComponentLists = Record.readInt();
10525	Sizes.NumComponents = Record.readInt();
10526	C = OMPHasDeviceAddrClause::CreateEmpty(C: Context, Sizes);
10527	break;
10528	}
10529	case llvm::omp::OMPC_allocate:
10530	C = OMPAllocateClause::CreateEmpty(C: Context, N: Record.readInt());
10531	break;
10532	case llvm::omp::OMPC_nontemporal:
10533	C = OMPNontemporalClause::CreateEmpty(C: Context, N: Record.readInt());
10534	break;
10535	case llvm::omp::OMPC_inclusive:
10536	C = OMPInclusiveClause::CreateEmpty(C: Context, N: Record.readInt());
10537	break;
10538	case llvm::omp::OMPC_exclusive:
10539	C = OMPExclusiveClause::CreateEmpty(C: Context, N: Record.readInt());
10540	break;
10541	case llvm::omp::OMPC_order:
10542	C = new (Context) OMPOrderClause();
10543	break;
10544	case llvm::omp::OMPC_init:
10545	C = OMPInitClause::CreateEmpty(C: Context, N: Record.readInt());
10546	break;
10547	case llvm::omp::OMPC_use:
10548	C = new (Context) OMPUseClause();
10549	break;
10550	case llvm::omp::OMPC_destroy:
10551	C = new (Context) OMPDestroyClause();
10552	break;
10553	case llvm::omp::OMPC_novariants:
10554	C = new (Context) OMPNovariantsClause();
10555	break;
10556	case llvm::omp::OMPC_nocontext:
10557	C = new (Context) OMPNocontextClause();
10558	break;
10559	case llvm::omp::OMPC_detach:
10560	C = new (Context) OMPDetachClause();
10561	break;
10562	case llvm::omp::OMPC_uses_allocators:
10563	C = OMPUsesAllocatorsClause::CreateEmpty(C: Context, N: Record.readInt());
10564	break;
10565	case llvm::omp::OMPC_affinity:
10566	C = OMPAffinityClause::CreateEmpty(C: Context, N: Record.readInt());
10567	break;
10568	case llvm::omp::OMPC_filter:
10569	C = new (Context) OMPFilterClause();
10570	break;
10571	case llvm::omp::OMPC_bind:
10572	C = OMPBindClause::CreateEmpty(C: Context);
10573	break;
10574	case llvm::omp::OMPC_align:
10575	C = new (Context) OMPAlignClause();
10576	break;
10577	case llvm::omp::OMPC_ompx_dyn_cgroup_mem:
10578	C = new (Context) OMPXDynCGroupMemClause();
10579	break;
10580	case llvm::omp::OMPC_doacross: {
10581	unsigned NumVars = Record.readInt();
10582	unsigned NumLoops = Record.readInt();
10583	C = OMPDoacrossClause::CreateEmpty(C: Context, N: NumVars, NumLoops);
10584	break;
10585	}
10586	case llvm::omp::OMPC_ompx_attribute:
10587	C = new (Context) OMPXAttributeClause();
10588	break;
10589	case llvm::omp::OMPC_ompx_bare:
10590	C = new (Context) OMPXBareClause();
10591	break;
10592	#define OMP_CLAUSE_NO_CLASS(Enum, Str) \
10593	case llvm::omp::Enum: \
10594	break;
10595	#include "llvm/Frontend/OpenMP/OMPKinds.def"
10596	default:
10597	break;
10598	}
10599	assert(C && "Unknown OMPClause type");
10600
10601	Visit(C);
10602	C->setLocStart(Record.readSourceLocation());
10603	C->setLocEnd(Record.readSourceLocation());
10604
10605	return C;
10606	}
10607
10608	void OMPClauseReader::VisitOMPClauseWithPreInit(OMPClauseWithPreInit *C) {
10609	C->setPreInitStmt(Record.readSubStmt(),
10610	static_cast<OpenMPDirectiveKind>(Record.readInt()));
10611	}
10612
10613	void OMPClauseReader::VisitOMPClauseWithPostUpdate(OMPClauseWithPostUpdate *C) {
10614	VisitOMPClauseWithPreInit(C);
10615	C->setPostUpdateExpr(Record.readSubExpr());
10616	}
10617
10618	void OMPClauseReader::VisitOMPIfClause(OMPIfClause *C) {
10619	VisitOMPClauseWithPreInit(C);
10620	C->setNameModifier(static_cast<OpenMPDirectiveKind>(Record.readInt()));
10621	C->setNameModifierLoc(Record.readSourceLocation());
10622	C->setColonLoc(Record.readSourceLocation());
10623	C->setCondition(Record.readSubExpr());
10624	C->setLParenLoc(Record.readSourceLocation());
10625	}
10626
10627	void OMPClauseReader::VisitOMPFinalClause(OMPFinalClause *C) {
10628	VisitOMPClauseWithPreInit(C);
10629	C->setCondition(Record.readSubExpr());
10630	C->setLParenLoc(Record.readSourceLocation());
10631	}
10632
10633	void OMPClauseReader::VisitOMPNumThreadsClause(OMPNumThreadsClause *C) {
10634	VisitOMPClauseWithPreInit(C);
10635	C->setNumThreads(Record.readSubExpr());
10636	C->setLParenLoc(Record.readSourceLocation());
10637	}
10638
10639	void OMPClauseReader::VisitOMPSafelenClause(OMPSafelenClause *C) {
10640	C->setSafelen(Record.readSubExpr());
10641	C->setLParenLoc(Record.readSourceLocation());
10642	}
10643
10644	void OMPClauseReader::VisitOMPSimdlenClause(OMPSimdlenClause *C) {
10645	C->setSimdlen(Record.readSubExpr());
10646	C->setLParenLoc(Record.readSourceLocation());
10647	}
10648
10649	void OMPClauseReader::VisitOMPSizesClause(OMPSizesClause *C) {
10650	for (Expr *&E : C->getSizesRefs())
10651	E = Record.readSubExpr();
10652	C->setLParenLoc(Record.readSourceLocation());
10653	}
10654
10655	void OMPClauseReader::VisitOMPFullClause(OMPFullClause *C) {}
10656
10657	void OMPClauseReader::VisitOMPPartialClause(OMPPartialClause *C) {
10658	C->setFactor(Record.readSubExpr());
10659	C->setLParenLoc(Record.readSourceLocation());
10660	}
10661
10662	void OMPClauseReader::VisitOMPAllocatorClause(OMPAllocatorClause *C) {
10663	C->setAllocator(Record.readExpr());
10664	C->setLParenLoc(Record.readSourceLocation());
10665	}
10666
10667	void OMPClauseReader::VisitOMPCollapseClause(OMPCollapseClause *C) {
10668	C->setNumForLoops(Record.readSubExpr());
10669	C->setLParenLoc(Record.readSourceLocation());
10670	}
10671
10672	void OMPClauseReader::VisitOMPDefaultClause(OMPDefaultClause *C) {
10673	C->setDefaultKind(static_cast<llvm::omp::DefaultKind>(Record.readInt()));
10674	C->setLParenLoc(Record.readSourceLocation());
10675	C->setDefaultKindKwLoc(Record.readSourceLocation());
10676	}
10677
10678	void OMPClauseReader::VisitOMPProcBindClause(OMPProcBindClause *C) {
10679	C->setProcBindKind(static_cast<llvm::omp::ProcBindKind>(Record.readInt()));
10680	C->setLParenLoc(Record.readSourceLocation());
10681	C->setProcBindKindKwLoc(Record.readSourceLocation());
10682	}
10683
10684	void OMPClauseReader::VisitOMPScheduleClause(OMPScheduleClause *C) {
10685	VisitOMPClauseWithPreInit(C);
10686	C->setScheduleKind(
10687	static_cast<OpenMPScheduleClauseKind>(Record.readInt()));
10688	C->setFirstScheduleModifier(
10689	static_cast<OpenMPScheduleClauseModifier>(Record.readInt()));
10690	C->setSecondScheduleModifier(
10691	static_cast<OpenMPScheduleClauseModifier>(Record.readInt()));
10692	C->setChunkSize(Record.readSubExpr());
10693	C->setLParenLoc(Record.readSourceLocation());
10694	C->setFirstScheduleModifierLoc(Record.readSourceLocation());
10695	C->setSecondScheduleModifierLoc(Record.readSourceLocation());
10696	C->setScheduleKindLoc(Record.readSourceLocation());
10697	C->setCommaLoc(Record.readSourceLocation());
10698	}
10699
10700	void OMPClauseReader::VisitOMPOrderedClause(OMPOrderedClause *C) {
10701	C->setNumForLoops(Record.readSubExpr());
10702	for (unsigned I = 0, E = C->NumberOfLoops; I < E; ++I)
10703	C->setLoopNumIterations(NumLoop: I, NumIterations: Record.readSubExpr());
10704	for (unsigned I = 0, E = C->NumberOfLoops; I < E; ++I)
10705	C->setLoopCounter(NumLoop: I, Counter: Record.readSubExpr());
10706	C->setLParenLoc(Record.readSourceLocation());
10707	}
10708
10709	void OMPClauseReader::VisitOMPDetachClause(OMPDetachClause *C) {
10710	C->setEventHandler(Record.readSubExpr());
10711	C->setLParenLoc(Record.readSourceLocation());
10712	}
10713
10714	void OMPClauseReader::VisitOMPNowaitClause(OMPNowaitClause *) {}
10715
10716	void OMPClauseReader::VisitOMPUntiedClause(OMPUntiedClause *) {}
10717
10718	void OMPClauseReader::VisitOMPMergeableClause(OMPMergeableClause *) {}
10719
10720	void OMPClauseReader::VisitOMPReadClause(OMPReadClause *) {}
10721
10722	void OMPClauseReader::VisitOMPWriteClause(OMPWriteClause *) {}
10723
10724	void OMPClauseReader::VisitOMPUpdateClause(OMPUpdateClause *C) {
10725	if (C->isExtended()) {
10726	C->setLParenLoc(Record.readSourceLocation());
10727	C->setArgumentLoc(Record.readSourceLocation());
10728	C->setDependencyKind(Record.readEnum<OpenMPDependClauseKind>());
10729	}
10730	}
10731
10732	void OMPClauseReader::VisitOMPCaptureClause(OMPCaptureClause *) {}
10733
10734	void OMPClauseReader::VisitOMPCompareClause(OMPCompareClause *) {}
10735
10736	// Read the parameter of fail clause. This will have been saved when
10737	// OMPClauseWriter is called.
10738	void OMPClauseReader::VisitOMPFailClause(OMPFailClause *C) {
10739	C->setLParenLoc(Record.readSourceLocation());
10740	SourceLocation FailParameterLoc = Record.readSourceLocation();
10741	C->setFailParameterLoc(FailParameterLoc);
10742	OpenMPClauseKind CKind = Record.readEnum<OpenMPClauseKind>();
10743	C->setFailParameter(CKind);
10744	}
10745
10746	void OMPClauseReader::VisitOMPSeqCstClause(OMPSeqCstClause *) {}
10747
10748	void OMPClauseReader::VisitOMPAcqRelClause(OMPAcqRelClause *) {}
10749
10750	void OMPClauseReader::VisitOMPAcquireClause(OMPAcquireClause *) {}
10751
10752	void OMPClauseReader::VisitOMPReleaseClause(OMPReleaseClause *) {}
10753
10754	void OMPClauseReader::VisitOMPRelaxedClause(OMPRelaxedClause *) {}
10755
10756	void OMPClauseReader::VisitOMPWeakClause(OMPWeakClause *) {}
10757
10758	void OMPClauseReader::VisitOMPThreadsClause(OMPThreadsClause *) {}
10759
10760	void OMPClauseReader::VisitOMPSIMDClause(OMPSIMDClause *) {}
10761
10762	void OMPClauseReader::VisitOMPNogroupClause(OMPNogroupClause *) {}
10763
10764	void OMPClauseReader::VisitOMPInitClause(OMPInitClause *C) {
10765	unsigned NumVars = C->varlist_size();
10766	SmallVector<Expr *, 16> Vars;
10767	Vars.reserve(N: NumVars);
10768	for (unsigned I = 0; I != NumVars; ++I)
10769	Vars.push_back(Elt: Record.readSubExpr());
10770	C->setVarRefs(Vars);
10771	C->setIsTarget(Record.readBool());
10772	C->setIsTargetSync(Record.readBool());
10773	C->setLParenLoc(Record.readSourceLocation());
10774	C->setVarLoc(Record.readSourceLocation());
10775	}
10776
10777	void OMPClauseReader::VisitOMPUseClause(OMPUseClause *C) {
10778	C->setInteropVar(Record.readSubExpr());
10779	C->setLParenLoc(Record.readSourceLocation());
10780	C->setVarLoc(Record.readSourceLocation());
10781	}
10782
10783	void OMPClauseReader::VisitOMPDestroyClause(OMPDestroyClause *C) {
10784	C->setInteropVar(Record.readSubExpr());
10785	C->setLParenLoc(Record.readSourceLocation());
10786	C->setVarLoc(Record.readSourceLocation());
10787	}
10788
10789	void OMPClauseReader::VisitOMPNovariantsClause(OMPNovariantsClause *C) {
10790	VisitOMPClauseWithPreInit(C);
10791	C->setCondition(Record.readSubExpr());
10792	C->setLParenLoc(Record.readSourceLocation());
10793	}
10794
10795	void OMPClauseReader::VisitOMPNocontextClause(OMPNocontextClause *C) {
10796	VisitOMPClauseWithPreInit(C);
10797	C->setCondition(Record.readSubExpr());
10798	C->setLParenLoc(Record.readSourceLocation());
10799	}
10800
10801	void OMPClauseReader::VisitOMPUnifiedAddressClause(OMPUnifiedAddressClause *) {}
10802
10803	void OMPClauseReader::VisitOMPUnifiedSharedMemoryClause(
10804	OMPUnifiedSharedMemoryClause *) {}
10805
10806	void OMPClauseReader::VisitOMPReverseOffloadClause(OMPReverseOffloadClause *) {}
10807
10808	void
10809	OMPClauseReader::VisitOMPDynamicAllocatorsClause(OMPDynamicAllocatorsClause *) {
10810	}
10811
10812	void OMPClauseReader::VisitOMPAtomicDefaultMemOrderClause(
10813	OMPAtomicDefaultMemOrderClause *C) {
10814	C->setAtomicDefaultMemOrderKind(
10815	static_cast<OpenMPAtomicDefaultMemOrderClauseKind>(Record.readInt()));
10816	C->setLParenLoc(Record.readSourceLocation());
10817	C->setAtomicDefaultMemOrderKindKwLoc(Record.readSourceLocation());
10818	}
10819
10820	void OMPClauseReader::VisitOMPAtClause(OMPAtClause *C) {
10821	C->setAtKind(static_cast<OpenMPAtClauseKind>(Record.readInt()));
10822	C->setLParenLoc(Record.readSourceLocation());
10823	C->setAtKindKwLoc(Record.readSourceLocation());
10824	}
10825
10826	void OMPClauseReader::VisitOMPSeverityClause(OMPSeverityClause *C) {
10827	C->setSeverityKind(static_cast<OpenMPSeverityClauseKind>(Record.readInt()));
10828	C->setLParenLoc(Record.readSourceLocation());
10829	C->setSeverityKindKwLoc(Record.readSourceLocation());
10830	}
10831
10832	void OMPClauseReader::VisitOMPMessageClause(OMPMessageClause *C) {
10833	C->setMessageString(Record.readSubExpr());
10834	C->setLParenLoc(Record.readSourceLocation());
10835	}
10836
10837	void OMPClauseReader::VisitOMPPrivateClause(OMPPrivateClause *C) {
10838	C->setLParenLoc(Record.readSourceLocation());
10839	unsigned NumVars = C->varlist_size();
10840	SmallVector<Expr *, 16> Vars;
10841	Vars.reserve(N: NumVars);
10842	for (unsigned i = 0; i != NumVars; ++i)
10843	Vars.push_back(Elt: Record.readSubExpr());
10844	C->setVarRefs(Vars);
10845	Vars.clear();
10846	for (unsigned i = 0; i != NumVars; ++i)
10847	Vars.push_back(Elt: Record.readSubExpr());
10848	C->setPrivateCopies(Vars);
10849	}
10850
10851	void OMPClauseReader::VisitOMPFirstprivateClause(OMPFirstprivateClause *C) {
10852	VisitOMPClauseWithPreInit(C);
10853	C->setLParenLoc(Record.readSourceLocation());
10854	unsigned NumVars = C->varlist_size();
10855	SmallVector<Expr *, 16> Vars;
10856	Vars.reserve(N: NumVars);
10857	for (unsigned i = 0; i != NumVars; ++i)
10858	Vars.push_back(Elt: Record.readSubExpr());
10859	C->setVarRefs(Vars);
10860	Vars.clear();
10861	for (unsigned i = 0; i != NumVars; ++i)
10862	Vars.push_back(Elt: Record.readSubExpr());
10863	C->setPrivateCopies(Vars);
10864	Vars.clear();
10865	for (unsigned i = 0; i != NumVars; ++i)
10866	Vars.push_back(Elt: Record.readSubExpr());
10867	C->setInits(Vars);
10868	}
10869
10870	void OMPClauseReader::VisitOMPLastprivateClause(OMPLastprivateClause *C) {
10871	VisitOMPClauseWithPostUpdate(C);
10872	C->setLParenLoc(Record.readSourceLocation());
10873	C->setKind(Record.readEnum<OpenMPLastprivateModifier>());
10874	C->setKindLoc(Record.readSourceLocation());
10875	C->setColonLoc(Record.readSourceLocation());
10876	unsigned NumVars = C->varlist_size();
10877	SmallVector<Expr *, 16> Vars;
10878	Vars.reserve(N: NumVars);
10879	for (unsigned i = 0; i != NumVars; ++i)
10880	Vars.push_back(Elt: Record.readSubExpr());
10881	C->setVarRefs(Vars);
10882	Vars.clear();
10883	for (unsigned i = 0; i != NumVars; ++i)
10884	Vars.push_back(Elt: Record.readSubExpr());
10885	C->setPrivateCopies(Vars);
10886	Vars.clear();
10887	for (unsigned i = 0; i != NumVars; ++i)
10888	Vars.push_back(Elt: Record.readSubExpr());
10889	C->setSourceExprs(Vars);
10890	Vars.clear();
10891	for (unsigned i = 0; i != NumVars; ++i)
10892	Vars.push_back(Elt: Record.readSubExpr());
10893	C->setDestinationExprs(Vars);
10894	Vars.clear();
10895	for (unsigned i = 0; i != NumVars; ++i)
10896	Vars.push_back(Elt: Record.readSubExpr());
10897	C->setAssignmentOps(Vars);
10898	}
10899
10900	void OMPClauseReader::VisitOMPSharedClause(OMPSharedClause *C) {
10901	C->setLParenLoc(Record.readSourceLocation());
10902	unsigned NumVars = C->varlist_size();
10903	SmallVector<Expr *, 16> Vars;
10904	Vars.reserve(N: NumVars);
10905	for (unsigned i = 0; i != NumVars; ++i)
10906	Vars.push_back(Elt: Record.readSubExpr());
10907	C->setVarRefs(Vars);
10908	}
10909
10910	void OMPClauseReader::VisitOMPReductionClause(OMPReductionClause *C) {
10911	VisitOMPClauseWithPostUpdate(C);
10912	C->setLParenLoc(Record.readSourceLocation());
10913	C->setModifierLoc(Record.readSourceLocation());
10914	C->setColonLoc(Record.readSourceLocation());
10915	NestedNameSpecifierLoc NNSL = Record.readNestedNameSpecifierLoc();
10916	DeclarationNameInfo DNI = Record.readDeclarationNameInfo();
10917	C->setQualifierLoc(NNSL);
10918	C->setNameInfo(DNI);
10919
10920	unsigned NumVars = C->varlist_size();
10921	SmallVector<Expr *, 16> Vars;
10922	Vars.reserve(N: NumVars);
10923	for (unsigned i = 0; i != NumVars; ++i)
10924	Vars.push_back(Elt: Record.readSubExpr());
10925	C->setVarRefs(Vars);
10926	Vars.clear();
10927	for (unsigned i = 0; i != NumVars; ++i)
10928	Vars.push_back(Elt: Record.readSubExpr());
10929	C->setPrivates(Vars);
10930	Vars.clear();
10931	for (unsigned i = 0; i != NumVars; ++i)
10932	Vars.push_back(Elt: Record.readSubExpr());
10933	C->setLHSExprs(Vars);
10934	Vars.clear();
10935	for (unsigned i = 0; i != NumVars; ++i)
10936	Vars.push_back(Elt: Record.readSubExpr());
10937	C->setRHSExprs(Vars);
10938	Vars.clear();
10939	for (unsigned i = 0; i != NumVars; ++i)
10940	Vars.push_back(Elt: Record.readSubExpr());
10941	C->setReductionOps(Vars);
10942	if (C->getModifier() == OMPC_REDUCTION_inscan) {
10943	Vars.clear();
10944	for (unsigned i = 0; i != NumVars; ++i)
10945	Vars.push_back(Elt: Record.readSubExpr());
10946	C->setInscanCopyOps(Vars);
10947	Vars.clear();
10948	for (unsigned i = 0; i != NumVars; ++i)
10949	Vars.push_back(Elt: Record.readSubExpr());
10950	C->setInscanCopyArrayTemps(Vars);
10951	Vars.clear();
10952	for (unsigned i = 0; i != NumVars; ++i)
10953	Vars.push_back(Elt: Record.readSubExpr());
10954	C->setInscanCopyArrayElems(Vars);
10955	}
10956	}
10957
10958	void OMPClauseReader::VisitOMPTaskReductionClause(OMPTaskReductionClause *C) {
10959	VisitOMPClauseWithPostUpdate(C);
10960	C->setLParenLoc(Record.readSourceLocation());
10961	C->setColonLoc(Record.readSourceLocation());
10962	NestedNameSpecifierLoc NNSL = Record.readNestedNameSpecifierLoc();
10963	DeclarationNameInfo DNI = Record.readDeclarationNameInfo();
10964	C->setQualifierLoc(NNSL);
10965	C->setNameInfo(DNI);
10966
10967	unsigned NumVars = C->varlist_size();
10968	SmallVector<Expr *, 16> Vars;
10969	Vars.reserve(N: NumVars);
10970	for (unsigned I = 0; I != NumVars; ++I)
10971	Vars.push_back(Elt: Record.readSubExpr());
10972	C->setVarRefs(Vars);
10973	Vars.clear();
10974	for (unsigned I = 0; I != NumVars; ++I)
10975	Vars.push_back(Elt: Record.readSubExpr());
10976	C->setPrivates(Vars);
10977	Vars.clear();
10978	for (unsigned I = 0; I != NumVars; ++I)
10979	Vars.push_back(Elt: Record.readSubExpr());
10980	C->setLHSExprs(Vars);
10981	Vars.clear();
10982	for (unsigned I = 0; I != NumVars; ++I)
10983	Vars.push_back(Elt: Record.readSubExpr());
10984	C->setRHSExprs(Vars);
10985	Vars.clear();
10986	for (unsigned I = 0; I != NumVars; ++I)
10987	Vars.push_back(Elt: Record.readSubExpr());
10988	C->setReductionOps(Vars);
10989	}
10990
10991	void OMPClauseReader::VisitOMPInReductionClause(OMPInReductionClause *C) {
10992	VisitOMPClauseWithPostUpdate(C);
10993	C->setLParenLoc(Record.readSourceLocation());
10994	C->setColonLoc(Record.readSourceLocation());
10995	NestedNameSpecifierLoc NNSL = Record.readNestedNameSpecifierLoc();
10996	DeclarationNameInfo DNI = Record.readDeclarationNameInfo();
10997	C->setQualifierLoc(NNSL);
10998	C->setNameInfo(DNI);
10999
11000	unsigned NumVars = C->varlist_size();
11001	SmallVector<Expr *, 16> Vars;
11002	Vars.reserve(N: NumVars);
11003	for (unsigned I = 0; I != NumVars; ++I)
11004	Vars.push_back(Elt: Record.readSubExpr());
11005	C->setVarRefs(Vars);
11006	Vars.clear();
11007	for (unsigned I = 0; I != NumVars; ++I)
11008	Vars.push_back(Elt: Record.readSubExpr());
11009	C->setPrivates(Vars);
11010	Vars.clear();
11011	for (unsigned I = 0; I != NumVars; ++I)
11012	Vars.push_back(Elt: Record.readSubExpr());
11013	C->setLHSExprs(Vars);
11014	Vars.clear();
11015	for (unsigned I = 0; I != NumVars; ++I)
11016	Vars.push_back(Elt: Record.readSubExpr());
11017	C->setRHSExprs(Vars);
11018	Vars.clear();
11019	for (unsigned I = 0; I != NumVars; ++I)
11020	Vars.push_back(Elt: Record.readSubExpr());
11021	C->setReductionOps(Vars);
11022	Vars.clear();
11023	for (unsigned I = 0; I != NumVars; ++I)
11024	Vars.push_back(Elt: Record.readSubExpr());
11025	C->setTaskgroupDescriptors(Vars);
11026	}
11027
11028	void OMPClauseReader::VisitOMPLinearClause(OMPLinearClause *C) {
11029	VisitOMPClauseWithPostUpdate(C);
11030	C->setLParenLoc(Record.readSourceLocation());
11031	C->setColonLoc(Record.readSourceLocation());
11032	C->setModifier(static_cast<OpenMPLinearClauseKind>(Record.readInt()));
11033	C->setModifierLoc(Record.readSourceLocation());
11034	unsigned NumVars = C->varlist_size();
11035	SmallVector<Expr *, 16> Vars;
11036	Vars.reserve(N: NumVars);
11037	for (unsigned i = 0; i != NumVars; ++i)
11038	Vars.push_back(Elt: Record.readSubExpr());
11039	C->setVarRefs(Vars);
11040	Vars.clear();
11041	for (unsigned i = 0; i != NumVars; ++i)
11042	Vars.push_back(Elt: Record.readSubExpr());
11043	C->setPrivates(Vars);
11044	Vars.clear();
11045	for (unsigned i = 0; i != NumVars; ++i)
11046	Vars.push_back(Elt: Record.readSubExpr());
11047	C->setInits(Vars);
11048	Vars.clear();
11049	for (unsigned i = 0; i != NumVars; ++i)
11050	Vars.push_back(Elt: Record.readSubExpr());
11051	C->setUpdates(Vars);
11052	Vars.clear();
11053	for (unsigned i = 0; i != NumVars; ++i)
11054	Vars.push_back(Elt: Record.readSubExpr());
11055	C->setFinals(Vars);
11056	C->setStep(Record.readSubExpr());
11057	C->setCalcStep(Record.readSubExpr());
11058	Vars.clear();
11059	for (unsigned I = 0; I != NumVars + 1; ++I)
11060	Vars.push_back(Elt: Record.readSubExpr());
11061	C->setUsedExprs(Vars);
11062	}
11063
11064	void OMPClauseReader::VisitOMPAlignedClause(OMPAlignedClause *C) {
11065	C->setLParenLoc(Record.readSourceLocation());
11066	C->setColonLoc(Record.readSourceLocation());
11067	unsigned NumVars = C->varlist_size();
11068	SmallVector<Expr *, 16> Vars;
11069	Vars.reserve(N: NumVars);
11070	for (unsigned i = 0; i != NumVars; ++i)
11071	Vars.push_back(Elt: Record.readSubExpr());
11072	C->setVarRefs(Vars);
11073	C->setAlignment(Record.readSubExpr());
11074	}
11075
11076	void OMPClauseReader::VisitOMPCopyinClause(OMPCopyinClause *C) {
11077	C->setLParenLoc(Record.readSourceLocation());
11078	unsigned NumVars = C->varlist_size();
11079	SmallVector<Expr *, 16> Exprs;
11080	Exprs.reserve(N: NumVars);
11081	for (unsigned i = 0; i != NumVars; ++i)
11082	Exprs.push_back(Elt: Record.readSubExpr());
11083	C->setVarRefs(Exprs);
11084	Exprs.clear();
11085	for (unsigned i = 0; i != NumVars; ++i)
11086	Exprs.push_back(Elt: Record.readSubExpr());
11087	C->setSourceExprs(Exprs);
11088	Exprs.clear();
11089	for (unsigned i = 0; i != NumVars; ++i)
11090	Exprs.push_back(Elt: Record.readSubExpr());
11091	C->setDestinationExprs(Exprs);
11092	Exprs.clear();
11093	for (unsigned i = 0; i != NumVars; ++i)
11094	Exprs.push_back(Elt: Record.readSubExpr());
11095	C->setAssignmentOps(Exprs);
11096	}
11097
11098	void OMPClauseReader::VisitOMPCopyprivateClause(OMPCopyprivateClause *C) {
11099	C->setLParenLoc(Record.readSourceLocation());
11100	unsigned NumVars = C->varlist_size();
11101	SmallVector<Expr *, 16> Exprs;
11102	Exprs.reserve(N: NumVars);
11103	for (unsigned i = 0; i != NumVars; ++i)
11104	Exprs.push_back(Elt: Record.readSubExpr());
11105	C->setVarRefs(Exprs);
11106	Exprs.clear();
11107	for (unsigned i = 0; i != NumVars; ++i)
11108	Exprs.push_back(Elt: Record.readSubExpr());
11109	C->setSourceExprs(Exprs);
11110	Exprs.clear();
11111	for (unsigned i = 0; i != NumVars; ++i)
11112	Exprs.push_back(Elt: Record.readSubExpr());
11113	C->setDestinationExprs(Exprs);
11114	Exprs.clear();
11115	for (unsigned i = 0; i != NumVars; ++i)
11116	Exprs.push_back(Elt: Record.readSubExpr());
11117	C->setAssignmentOps(Exprs);
11118	}
11119
11120	void OMPClauseReader::VisitOMPFlushClause(OMPFlushClause *C) {
11121	C->setLParenLoc(Record.readSourceLocation());
11122	unsigned NumVars = C->varlist_size();
11123	SmallVector<Expr *, 16> Vars;
11124	Vars.reserve(N: NumVars);
11125	for (unsigned i = 0; i != NumVars; ++i)
11126	Vars.push_back(Elt: Record.readSubExpr());
11127	C->setVarRefs(Vars);
11128	}
11129
11130	void OMPClauseReader::VisitOMPDepobjClause(OMPDepobjClause *C) {
11131	C->setDepobj(Record.readSubExpr());
11132	C->setLParenLoc(Record.readSourceLocation());
11133	}
11134
11135	void OMPClauseReader::VisitOMPDependClause(OMPDependClause *C) {
11136	C->setLParenLoc(Record.readSourceLocation());
11137	C->setModifier(Record.readSubExpr());
11138	C->setDependencyKind(
11139	static_cast<OpenMPDependClauseKind>(Record.readInt()));
11140	C->setDependencyLoc(Record.readSourceLocation());
11141	C->setColonLoc(Record.readSourceLocation());
11142	C->setOmpAllMemoryLoc(Record.readSourceLocation());
11143	unsigned NumVars = C->varlist_size();
11144	SmallVector<Expr *, 16> Vars;
11145	Vars.reserve(N: NumVars);
11146	for (unsigned I = 0; I != NumVars; ++I)
11147	Vars.push_back(Elt: Record.readSubExpr());
11148	C->setVarRefs(Vars);
11149	for (unsigned I = 0, E = C->getNumLoops(); I < E; ++I)
11150	C->setLoopData(NumLoop: I, Cnt: Record.readSubExpr());
11151	}
11152
11153	void OMPClauseReader::VisitOMPDeviceClause(OMPDeviceClause *C) {
11154	VisitOMPClauseWithPreInit(C);
11155	C->setModifier(Record.readEnum<OpenMPDeviceClauseModifier>());
11156	C->setDevice(Record.readSubExpr());
11157	C->setModifierLoc(Record.readSourceLocation());
11158	C->setLParenLoc(Record.readSourceLocation());
11159	}
11160
11161	void OMPClauseReader::VisitOMPMapClause(OMPMapClause *C) {
11162	C->setLParenLoc(Record.readSourceLocation());
11163	bool HasIteratorModifier = false;
11164	for (unsigned I = 0; I < NumberOfOMPMapClauseModifiers; ++I) {
11165	C->setMapTypeModifier(
11166	I, T: static_cast<OpenMPMapModifierKind>(Record.readInt()));
11167	C->setMapTypeModifierLoc(I, TLoc: Record.readSourceLocation());
11168	if (C->getMapTypeModifier(Cnt: I) == OMPC_MAP_MODIFIER_iterator)
11169	HasIteratorModifier = true;
11170	}
11171	C->setMapperQualifierLoc(Record.readNestedNameSpecifierLoc());
11172	C->setMapperIdInfo(Record.readDeclarationNameInfo());
11173	C->setMapType(
11174	static_cast<OpenMPMapClauseKind>(Record.readInt()));
11175	C->setMapLoc(Record.readSourceLocation());
11176	C->setColonLoc(Record.readSourceLocation());
11177	auto NumVars = C->varlist_size();
11178	auto UniqueDecls = C->getUniqueDeclarationsNum();
11179	auto TotalLists = C->getTotalComponentListNum();
11180	auto TotalComponents = C->getTotalComponentsNum();
11181
11182	SmallVector<Expr *, 16> Vars;
11183	Vars.reserve(N: NumVars);
11184	for (unsigned i = 0; i != NumVars; ++i)
11185	Vars.push_back(Elt: Record.readExpr());
11186	C->setVarRefs(Vars);
11187
11188	SmallVector<Expr *, 16> UDMappers;
11189	UDMappers.reserve(N: NumVars);
11190	for (unsigned I = 0; I < NumVars; ++I)
11191	UDMappers.push_back(Elt: Record.readExpr());
11192	C->setUDMapperRefs(UDMappers);
11193
11194	if (HasIteratorModifier)
11195	C->setIteratorModifier(Record.readExpr());
11196
11197	SmallVector<ValueDecl *, 16> Decls;
11198	Decls.reserve(N: UniqueDecls);
11199	for (unsigned i = 0; i < UniqueDecls; ++i)
11200	Decls.push_back(Elt: Record.readDeclAs<ValueDecl>());
11201	C->setUniqueDecls(Decls);
11202
11203	SmallVector<unsigned, 16> ListsPerDecl;
11204	ListsPerDecl.reserve(N: UniqueDecls);
11205	for (unsigned i = 0; i < UniqueDecls; ++i)
11206	ListsPerDecl.push_back(Elt: Record.readInt());
11207	C->setDeclNumLists(ListsPerDecl);
11208
11209	SmallVector<unsigned, 32> ListSizes;
11210	ListSizes.reserve(N: TotalLists);
11211	for (unsigned i = 0; i < TotalLists; ++i)
11212	ListSizes.push_back(Elt: Record.readInt());
11213	C->setComponentListSizes(ListSizes);
11214
11215	SmallVector<OMPClauseMappableExprCommon::MappableComponent, 32> Components;
11216	Components.reserve(N: TotalComponents);
11217	for (unsigned i = 0; i < TotalComponents; ++i) {
11218	Expr *AssociatedExprPr = Record.readExpr();
11219	auto *AssociatedDecl = Record.readDeclAs<ValueDecl>();
11220	Components.emplace_back(Args&: AssociatedExprPr, Args&: AssociatedDecl,
11221	/*IsNonContiguous=*/Args: false);
11222	}
11223	C->setComponents(Components, ListSizes);
11224	}
11225
11226	void OMPClauseReader::VisitOMPAllocateClause(OMPAllocateClause *C) {
11227	C->setLParenLoc(Record.readSourceLocation());
11228	C->setColonLoc(Record.readSourceLocation());
11229	C->setAllocator(Record.readSubExpr());
11230	unsigned NumVars = C->varlist_size();
11231	SmallVector<Expr *, 16> Vars;
11232	Vars.reserve(N: NumVars);
11233	for (unsigned i = 0; i != NumVars; ++i)
11234	Vars.push_back(Elt: Record.readSubExpr());
11235	C->setVarRefs(Vars);
11236	}
11237
11238	void OMPClauseReader::VisitOMPNumTeamsClause(OMPNumTeamsClause *C) {
11239	VisitOMPClauseWithPreInit(C);
11240	C->setNumTeams(Record.readSubExpr());
11241	C->setLParenLoc(Record.readSourceLocation());
11242	}
11243
11244	void OMPClauseReader::VisitOMPThreadLimitClause(OMPThreadLimitClause *C) {
11245	VisitOMPClauseWithPreInit(C);
11246	C->setThreadLimit(Record.readSubExpr());
11247	C->setLParenLoc(Record.readSourceLocation());
11248	}
11249
11250	void OMPClauseReader::VisitOMPPriorityClause(OMPPriorityClause *C) {
11251	VisitOMPClauseWithPreInit(C);
11252	C->setPriority(Record.readSubExpr());
11253	C->setLParenLoc(Record.readSourceLocation());
11254	}
11255
11256	void OMPClauseReader::VisitOMPGrainsizeClause(OMPGrainsizeClause *C) {
11257	VisitOMPClauseWithPreInit(C);
11258	C->setModifier(Record.readEnum<OpenMPGrainsizeClauseModifier>());
11259	C->setGrainsize(Record.readSubExpr());
11260	C->setModifierLoc(Record.readSourceLocation());
11261	C->setLParenLoc(Record.readSourceLocation());
11262	}
11263
11264	void OMPClauseReader::VisitOMPNumTasksClause(OMPNumTasksClause *C) {
11265	VisitOMPClauseWithPreInit(C);
11266	C->setModifier(Record.readEnum<OpenMPNumTasksClauseModifier>());
11267	C->setNumTasks(Record.readSubExpr());
11268	C->setModifierLoc(Record.readSourceLocation());
11269	C->setLParenLoc(Record.readSourceLocation());
11270	}
11271
11272	void OMPClauseReader::VisitOMPHintClause(OMPHintClause *C) {
11273	C->setHint(Record.readSubExpr());
11274	C->setLParenLoc(Record.readSourceLocation());
11275	}
11276
11277	void OMPClauseReader::VisitOMPDistScheduleClause(OMPDistScheduleClause *C) {
11278	VisitOMPClauseWithPreInit(C);
11279	C->setDistScheduleKind(
11280	static_cast<OpenMPDistScheduleClauseKind>(Record.readInt()));
11281	C->setChunkSize(Record.readSubExpr());
11282	C->setLParenLoc(Record.readSourceLocation());
11283	C->setDistScheduleKindLoc(Record.readSourceLocation());
11284	C->setCommaLoc(Record.readSourceLocation());
11285	}
11286
11287	void OMPClauseReader::VisitOMPDefaultmapClause(OMPDefaultmapClause *C) {
11288	C->setDefaultmapKind(
11289	static_cast<OpenMPDefaultmapClauseKind>(Record.readInt()));
11290	C->setDefaultmapModifier(
11291	static_cast<OpenMPDefaultmapClauseModifier>(Record.readInt()));
11292	C->setLParenLoc(Record.readSourceLocation());
11293	C->setDefaultmapModifierLoc(Record.readSourceLocation());
11294	C->setDefaultmapKindLoc(Record.readSourceLocation());
11295	}
11296
11297	void OMPClauseReader::VisitOMPToClause(OMPToClause *C) {
11298	C->setLParenLoc(Record.readSourceLocation());
11299	for (unsigned I = 0; I < NumberOfOMPMotionModifiers; ++I) {
11300	C->setMotionModifier(
11301	I, T: static_cast<OpenMPMotionModifierKind>(Record.readInt()));
11302	C->setMotionModifierLoc(I, TLoc: Record.readSourceLocation());
11303	}
11304	C->setMapperQualifierLoc(Record.readNestedNameSpecifierLoc());
11305	C->setMapperIdInfo(Record.readDeclarationNameInfo());
11306	C->setColonLoc(Record.readSourceLocation());
11307	auto NumVars = C->varlist_size();
11308	auto UniqueDecls = C->getUniqueDeclarationsNum();
11309	auto TotalLists = C->getTotalComponentListNum();
11310	auto TotalComponents = C->getTotalComponentsNum();
11311
11312	SmallVector<Expr *, 16> Vars;
11313	Vars.reserve(N: NumVars);
11314	for (unsigned i = 0; i != NumVars; ++i)
11315	Vars.push_back(Elt: Record.readSubExpr());
11316	C->setVarRefs(Vars);
11317
11318	SmallVector<Expr *, 16> UDMappers;
11319	UDMappers.reserve(N: NumVars);
11320	for (unsigned I = 0; I < NumVars; ++I)
11321	UDMappers.push_back(Elt: Record.readSubExpr());
11322	C->setUDMapperRefs(UDMappers);
11323
11324	SmallVector<ValueDecl *, 16> Decls;
11325	Decls.reserve(N: UniqueDecls);
11326	for (unsigned i = 0; i < UniqueDecls; ++i)
11327	Decls.push_back(Elt: Record.readDeclAs<ValueDecl>());
11328	C->setUniqueDecls(Decls);
11329
11330	SmallVector<unsigned, 16> ListsPerDecl;
11331	ListsPerDecl.reserve(N: UniqueDecls);
11332	for (unsigned i = 0; i < UniqueDecls; ++i)
11333	ListsPerDecl.push_back(Elt: Record.readInt());
11334	C->setDeclNumLists(ListsPerDecl);
11335
11336	SmallVector<unsigned, 32> ListSizes;
11337	ListSizes.reserve(N: TotalLists);
11338	for (unsigned i = 0; i < TotalLists; ++i)
11339	ListSizes.push_back(Elt: Record.readInt());
11340	C->setComponentListSizes(ListSizes);
11341
11342	SmallVector<OMPClauseMappableExprCommon::MappableComponent, 32> Components;
11343	Components.reserve(N: TotalComponents);
11344	for (unsigned i = 0; i < TotalComponents; ++i) {
11345	Expr *AssociatedExprPr = Record.readSubExpr();
11346	bool IsNonContiguous = Record.readBool();
11347	auto *AssociatedDecl = Record.readDeclAs<ValueDecl>();
11348	Components.emplace_back(Args&: AssociatedExprPr, Args&: AssociatedDecl, Args&: IsNonContiguous);
11349	}
11350	C->setComponents(Components, ListSizes);
11351	}
11352
11353	void OMPClauseReader::VisitOMPFromClause(OMPFromClause *C) {
11354	C->setLParenLoc(Record.readSourceLocation());
11355	for (unsigned I = 0; I < NumberOfOMPMotionModifiers; ++I) {
11356	C->setMotionModifier(
11357	I, T: static_cast<OpenMPMotionModifierKind>(Record.readInt()));
11358	C->setMotionModifierLoc(I, TLoc: Record.readSourceLocation());
11359	}
11360	C->setMapperQualifierLoc(Record.readNestedNameSpecifierLoc());
11361	C->setMapperIdInfo(Record.readDeclarationNameInfo());
11362	C->setColonLoc(Record.readSourceLocation());
11363	auto NumVars = C->varlist_size();
11364	auto UniqueDecls = C->getUniqueDeclarationsNum();
11365	auto TotalLists = C->getTotalComponentListNum();
11366	auto TotalComponents = C->getTotalComponentsNum();
11367
11368	SmallVector<Expr *, 16> Vars;
11369	Vars.reserve(N: NumVars);
11370	for (unsigned i = 0; i != NumVars; ++i)
11371	Vars.push_back(Elt: Record.readSubExpr());
11372	C->setVarRefs(Vars);
11373
11374	SmallVector<Expr *, 16> UDMappers;
11375	UDMappers.reserve(N: NumVars);
11376	for (unsigned I = 0; I < NumVars; ++I)
11377	UDMappers.push_back(Elt: Record.readSubExpr());
11378	C->setUDMapperRefs(UDMappers);
11379
11380	SmallVector<ValueDecl *, 16> Decls;
11381	Decls.reserve(N: UniqueDecls);
11382	for (unsigned i = 0; i < UniqueDecls; ++i)
11383	Decls.push_back(Elt: Record.readDeclAs<ValueDecl>());
11384	C->setUniqueDecls(Decls);
11385
11386	SmallVector<unsigned, 16> ListsPerDecl;
11387	ListsPerDecl.reserve(N: UniqueDecls);
11388	for (unsigned i = 0; i < UniqueDecls; ++i)
11389	ListsPerDecl.push_back(Elt: Record.readInt());
11390	C->setDeclNumLists(ListsPerDecl);
11391
11392	SmallVector<unsigned, 32> ListSizes;
11393	ListSizes.reserve(N: TotalLists);
11394	for (unsigned i = 0; i < TotalLists; ++i)
11395	ListSizes.push_back(Elt: Record.readInt());
11396	C->setComponentListSizes(ListSizes);
11397
11398	SmallVector<OMPClauseMappableExprCommon::MappableComponent, 32> Components;
11399	Components.reserve(N: TotalComponents);
11400	for (unsigned i = 0; i < TotalComponents; ++i) {
11401	Expr *AssociatedExprPr = Record.readSubExpr();
11402	bool IsNonContiguous = Record.readBool();
11403	auto *AssociatedDecl = Record.readDeclAs<ValueDecl>();
11404	Components.emplace_back(Args&: AssociatedExprPr, Args&: AssociatedDecl, Args&: IsNonContiguous);
11405	}
11406	C->setComponents(Components, ListSizes);
11407	}
11408
11409	void OMPClauseReader::VisitOMPUseDevicePtrClause(OMPUseDevicePtrClause *C) {
11410	C->setLParenLoc(Record.readSourceLocation());
11411	auto NumVars = C->varlist_size();
11412	auto UniqueDecls = C->getUniqueDeclarationsNum();
11413	auto TotalLists = C->getTotalComponentListNum();
11414	auto TotalComponents = C->getTotalComponentsNum();
11415
11416	SmallVector<Expr *, 16> Vars;
11417	Vars.reserve(N: NumVars);
11418	for (unsigned i = 0; i != NumVars; ++i)
11419	Vars.push_back(Elt: Record.readSubExpr());
11420	C->setVarRefs(Vars);
11421	Vars.clear();
11422	for (unsigned i = 0; i != NumVars; ++i)
11423	Vars.push_back(Elt: Record.readSubExpr());
11424	C->setPrivateCopies(Vars);
11425	Vars.clear();
11426	for (unsigned i = 0; i != NumVars; ++i)
11427	Vars.push_back(Elt: Record.readSubExpr());
11428	C->setInits(Vars);
11429
11430	SmallVector<ValueDecl *, 16> Decls;
11431	Decls.reserve(N: UniqueDecls);
11432	for (unsigned i = 0; i < UniqueDecls; ++i)
11433	Decls.push_back(Elt: Record.readDeclAs<ValueDecl>());
11434	C->setUniqueDecls(Decls);
11435
11436	SmallVector<unsigned, 16> ListsPerDecl;
11437	ListsPerDecl.reserve(N: UniqueDecls);
11438	for (unsigned i = 0; i < UniqueDecls; ++i)
11439	ListsPerDecl.push_back(Elt: Record.readInt());
11440	C->setDeclNumLists(ListsPerDecl);
11441
11442	SmallVector<unsigned, 32> ListSizes;
11443	ListSizes.reserve(N: TotalLists);
11444	for (unsigned i = 0; i < TotalLists; ++i)
11445	ListSizes.push_back(Elt: Record.readInt());
11446	C->setComponentListSizes(ListSizes);
11447
11448	SmallVector<OMPClauseMappableExprCommon::MappableComponent, 32> Components;
11449	Components.reserve(N: TotalComponents);
11450	for (unsigned i = 0; i < TotalComponents; ++i) {
11451	auto *AssociatedExprPr = Record.readSubExpr();
11452	auto *AssociatedDecl = Record.readDeclAs<ValueDecl>();
11453	Components.emplace_back(Args&: AssociatedExprPr, Args&: AssociatedDecl,
11454	/*IsNonContiguous=*/Args: false);
11455	}
11456	C->setComponents(Components, ListSizes);
11457	}
11458
11459	void OMPClauseReader::VisitOMPUseDeviceAddrClause(OMPUseDeviceAddrClause *C) {
11460	C->setLParenLoc(Record.readSourceLocation());
11461	auto NumVars = C->varlist_size();
11462	auto UniqueDecls = C->getUniqueDeclarationsNum();
11463	auto TotalLists = C->getTotalComponentListNum();
11464	auto TotalComponents = C->getTotalComponentsNum();
11465
11466	SmallVector<Expr *, 16> Vars;
11467	Vars.reserve(N: NumVars);
11468	for (unsigned i = 0; i != NumVars; ++i)
11469	Vars.push_back(Elt: Record.readSubExpr());
11470	C->setVarRefs(Vars);
11471
11472	SmallVector<ValueDecl *, 16> Decls;
11473	Decls.reserve(N: UniqueDecls);
11474	for (unsigned i = 0; i < UniqueDecls; ++i)
11475	Decls.push_back(Elt: Record.readDeclAs<ValueDecl>());
11476	C->setUniqueDecls(Decls);
11477
11478	SmallVector<unsigned, 16> ListsPerDecl;
11479	ListsPerDecl.reserve(N: UniqueDecls);
11480	for (unsigned i = 0; i < UniqueDecls; ++i)
11481	ListsPerDecl.push_back(Elt: Record.readInt());
11482	C->setDeclNumLists(ListsPerDecl);
11483
11484	SmallVector<unsigned, 32> ListSizes;
11485	ListSizes.reserve(N: TotalLists);
11486	for (unsigned i = 0; i < TotalLists; ++i)
11487	ListSizes.push_back(Elt: Record.readInt());
11488	C->setComponentListSizes(ListSizes);
11489
11490	SmallVector<OMPClauseMappableExprCommon::MappableComponent, 32> Components;
11491	Components.reserve(N: TotalComponents);
11492	for (unsigned i = 0; i < TotalComponents; ++i) {
11493	Expr *AssociatedExpr = Record.readSubExpr();
11494	auto *AssociatedDecl = Record.readDeclAs<ValueDecl>();
11495	Components.emplace_back(Args&: AssociatedExpr, Args&: AssociatedDecl,
11496	/*IsNonContiguous*/ Args: false);
11497	}
11498	C->setComponents(Components, ListSizes);
11499	}
11500
11501	void OMPClauseReader::VisitOMPIsDevicePtrClause(OMPIsDevicePtrClause *C) {
11502	C->setLParenLoc(Record.readSourceLocation());
11503	auto NumVars = C->varlist_size();
11504	auto UniqueDecls = C->getUniqueDeclarationsNum();
11505	auto TotalLists = C->getTotalComponentListNum();
11506	auto TotalComponents = C->getTotalComponentsNum();
11507
11508	SmallVector<Expr *, 16> Vars;
11509	Vars.reserve(N: NumVars);
11510	for (unsigned i = 0; i != NumVars; ++i)
11511	Vars.push_back(Elt: Record.readSubExpr());
11512	C->setVarRefs(Vars);
11513	Vars.clear();
11514
11515	SmallVector<ValueDecl *, 16> Decls;
11516	Decls.reserve(N: UniqueDecls);
11517	for (unsigned i = 0; i < UniqueDecls; ++i)
11518	Decls.push_back(Elt: Record.readDeclAs<ValueDecl>());
11519	C->setUniqueDecls(Decls);
11520
11521	SmallVector<unsigned, 16> ListsPerDecl;
11522	ListsPerDecl.reserve(N: UniqueDecls);
11523	for (unsigned i = 0; i < UniqueDecls; ++i)
11524	ListsPerDecl.push_back(Elt: Record.readInt());
11525	C->setDeclNumLists(ListsPerDecl);
11526
11527	SmallVector<unsigned, 32> ListSizes;
11528	ListSizes.reserve(N: TotalLists);
11529	for (unsigned i = 0; i < TotalLists; ++i)
11530	ListSizes.push_back(Elt: Record.readInt());
11531	C->setComponentListSizes(ListSizes);
11532
11533	SmallVector<OMPClauseMappableExprCommon::MappableComponent, 32> Components;
11534	Components.reserve(N: TotalComponents);
11535	for (unsigned i = 0; i < TotalComponents; ++i) {
11536	Expr *AssociatedExpr = Record.readSubExpr();
11537	auto *AssociatedDecl = Record.readDeclAs<ValueDecl>();
11538	Components.emplace_back(Args&: AssociatedExpr, Args&: AssociatedDecl,
11539	/*IsNonContiguous=*/Args: false);
11540	}
11541	C->setComponents(Components, ListSizes);
11542	}
11543
11544	void OMPClauseReader::VisitOMPHasDeviceAddrClause(OMPHasDeviceAddrClause *C) {
11545	C->setLParenLoc(Record.readSourceLocation());
11546	auto NumVars = C->varlist_size();
11547	auto UniqueDecls = C->getUniqueDeclarationsNum();
11548	auto TotalLists = C->getTotalComponentListNum();
11549	auto TotalComponents = C->getTotalComponentsNum();
11550
11551	SmallVector<Expr *, 16> Vars;
11552	Vars.reserve(N: NumVars);
11553	for (unsigned I = 0; I != NumVars; ++I)
11554	Vars.push_back(Elt: Record.readSubExpr());
11555	C->setVarRefs(Vars);
11556	Vars.clear();
11557
11558	SmallVector<ValueDecl *, 16> Decls;
11559	Decls.reserve(N: UniqueDecls);
11560	for (unsigned I = 0; I < UniqueDecls; ++I)
11561	Decls.push_back(Elt: Record.readDeclAs<ValueDecl>());
11562	C->setUniqueDecls(Decls);
11563
11564	SmallVector<unsigned, 16> ListsPerDecl;
11565	ListsPerDecl.reserve(N: UniqueDecls);
11566	for (unsigned I = 0; I < UniqueDecls; ++I)
11567	ListsPerDecl.push_back(Elt: Record.readInt());
11568	C->setDeclNumLists(ListsPerDecl);
11569
11570	SmallVector<unsigned, 32> ListSizes;
11571	ListSizes.reserve(N: TotalLists);
11572	for (unsigned i = 0; i < TotalLists; ++i)
11573	ListSizes.push_back(Elt: Record.readInt());
11574	C->setComponentListSizes(ListSizes);
11575
11576	SmallVector<OMPClauseMappableExprCommon::MappableComponent, 32> Components;
11577	Components.reserve(N: TotalComponents);
11578	for (unsigned I = 0; I < TotalComponents; ++I) {
11579	Expr *AssociatedExpr = Record.readSubExpr();
11580	auto *AssociatedDecl = Record.readDeclAs<ValueDecl>();
11581	Components.emplace_back(Args&: AssociatedExpr, Args&: AssociatedDecl,
11582	/*IsNonContiguous=*/Args: false);
11583	}
11584	C->setComponents(Components, ListSizes);
11585	}
11586
11587	void OMPClauseReader::VisitOMPNontemporalClause(OMPNontemporalClause *C) {
11588	C->setLParenLoc(Record.readSourceLocation());
11589	unsigned NumVars = C->varlist_size();
11590	SmallVector<Expr *, 16> Vars;
11591	Vars.reserve(N: NumVars);
11592	for (unsigned i = 0; i != NumVars; ++i)
11593	Vars.push_back(Elt: Record.readSubExpr());
11594	C->setVarRefs(Vars);
11595	Vars.clear();
11596	Vars.reserve(N: NumVars);
11597	for (unsigned i = 0; i != NumVars; ++i)
11598	Vars.push_back(Elt: Record.readSubExpr());
11599	C->setPrivateRefs(Vars);
11600	}
11601
11602	void OMPClauseReader::VisitOMPInclusiveClause(OMPInclusiveClause *C) {
11603	C->setLParenLoc(Record.readSourceLocation());
11604	unsigned NumVars = C->varlist_size();
11605	SmallVector<Expr *, 16> Vars;
11606	Vars.reserve(N: NumVars);
11607	for (unsigned i = 0; i != NumVars; ++i)
11608	Vars.push_back(Elt: Record.readSubExpr());
11609	C->setVarRefs(Vars);
11610	}
11611
11612	void OMPClauseReader::VisitOMPExclusiveClause(OMPExclusiveClause *C) {
11613	C->setLParenLoc(Record.readSourceLocation());
11614	unsigned NumVars = C->varlist_size();
11615	SmallVector<Expr *, 16> Vars;
11616	Vars.reserve(N: NumVars);
11617	for (unsigned i = 0; i != NumVars; ++i)
11618	Vars.push_back(Elt: Record.readSubExpr());
11619	C->setVarRefs(Vars);
11620	}
11621
11622	void OMPClauseReader::VisitOMPUsesAllocatorsClause(OMPUsesAllocatorsClause *C) {
11623	C->setLParenLoc(Record.readSourceLocation());
11624	unsigned NumOfAllocators = C->getNumberOfAllocators();
11625	SmallVector<OMPUsesAllocatorsClause::Data, 4> Data;
11626	Data.reserve(N: NumOfAllocators);
11627	for (unsigned I = 0; I != NumOfAllocators; ++I) {
11628	OMPUsesAllocatorsClause::Data &D = Data.emplace_back();
11629	D.Allocator = Record.readSubExpr();
11630	D.AllocatorTraits = Record.readSubExpr();
11631	D.LParenLoc = Record.readSourceLocation();
11632	D.RParenLoc = Record.readSourceLocation();
11633	}
11634	C->setAllocatorsData(Data);
11635	}
11636
11637	void OMPClauseReader::VisitOMPAffinityClause(OMPAffinityClause *C) {
11638	C->setLParenLoc(Record.readSourceLocation());
11639	C->setModifier(Record.readSubExpr());
11640	C->setColonLoc(Record.readSourceLocation());
11641	unsigned NumOfLocators = C->varlist_size();
11642	SmallVector<Expr *, 4> Locators;
11643	Locators.reserve(N: NumOfLocators);
11644	for (unsigned I = 0; I != NumOfLocators; ++I)
11645	Locators.push_back(Elt: Record.readSubExpr());
11646	C->setVarRefs(Locators);
11647	}
11648
11649	void OMPClauseReader::VisitOMPOrderClause(OMPOrderClause *C) {
11650	C->setKind(Record.readEnum<OpenMPOrderClauseKind>());
11651	C->setModifier(Record.readEnum<OpenMPOrderClauseModifier>());
11652	C->setLParenLoc(Record.readSourceLocation());
11653	C->setKindKwLoc(Record.readSourceLocation());
11654	C->setModifierKwLoc(Record.readSourceLocation());
11655	}
11656
11657	void OMPClauseReader::VisitOMPFilterClause(OMPFilterClause *C) {
11658	VisitOMPClauseWithPreInit(C);
11659	C->setThreadID(Record.readSubExpr());
11660	C->setLParenLoc(Record.readSourceLocation());
11661	}
11662
11663	void OMPClauseReader::VisitOMPBindClause(OMPBindClause *C) {
11664	C->setBindKind(Record.readEnum<OpenMPBindClauseKind>());
11665	C->setLParenLoc(Record.readSourceLocation());
11666	C->setBindKindLoc(Record.readSourceLocation());
11667	}
11668
11669	void OMPClauseReader::VisitOMPAlignClause(OMPAlignClause *C) {
11670	C->setAlignment(Record.readExpr());
11671	C->setLParenLoc(Record.readSourceLocation());
11672	}
11673
11674	void OMPClauseReader::VisitOMPXDynCGroupMemClause(OMPXDynCGroupMemClause *C) {
11675	VisitOMPClauseWithPreInit(C);
11676	C->setSize(Record.readSubExpr());
11677	C->setLParenLoc(Record.readSourceLocation());
11678	}
11679
11680	void OMPClauseReader::VisitOMPDoacrossClause(OMPDoacrossClause *C) {
11681	C->setLParenLoc(Record.readSourceLocation());
11682	C->setDependenceType(
11683	static_cast<OpenMPDoacrossClauseModifier>(Record.readInt()));
11684	C->setDependenceLoc(Record.readSourceLocation());
11685	C->setColonLoc(Record.readSourceLocation());
11686	unsigned NumVars = C->varlist_size();
11687	SmallVector<Expr *, 16> Vars;
11688	Vars.reserve(N: NumVars);
11689	for (unsigned I = 0; I != NumVars; ++I)
11690	Vars.push_back(Elt: Record.readSubExpr());
11691	C->setVarRefs(Vars);
11692	for (unsigned I = 0, E = C->getNumLoops(); I < E; ++I)
11693	C->setLoopData(NumLoop: I, Cnt: Record.readSubExpr());
11694	}
11695
11696	void OMPClauseReader::VisitOMPXAttributeClause(OMPXAttributeClause *C) {
11697	AttrVec Attrs;
11698	Record.readAttributes(Attrs);
11699	C->setAttrs(Attrs);
11700	C->setLocStart(Record.readSourceLocation());
11701	C->setLParenLoc(Record.readSourceLocation());
11702	C->setLocEnd(Record.readSourceLocation());
11703	}
11704
11705	void OMPClauseReader::VisitOMPXBareClause(OMPXBareClause *C) {}
11706
11707	OMPTraitInfo *ASTRecordReader::readOMPTraitInfo() {
11708	OMPTraitInfo &TI = getContext().getNewOMPTraitInfo();
11709	TI.Sets.resize(readUInt32());
11710	for (auto &Set : TI.Sets) {
11711	Set.Kind = readEnum<llvm::omp::TraitSet>();
11712	Set.Selectors.resize(readUInt32());
11713	for (auto &Selector : Set.Selectors) {
11714	Selector.Kind = readEnum<llvm::omp::TraitSelector>();
11715	Selector.ScoreOrCondition = nullptr;
11716	if (readBool())
11717	Selector.ScoreOrCondition = readExprRef();
11718	Selector.Properties.resize(readUInt32());
11719	for (auto &Property : Selector.Properties)
11720	Property.Kind = readEnum<llvm::omp::TraitProperty>();
11721	}
11722	}
11723	return &TI;
11724	}
11725
11726	void ASTRecordReader::readOMPChildren(OMPChildren *Data) {
11727	if (!Data)
11728	return;
11729	if (Reader->ReadingKind == ASTReader::Read_Stmt) {
11730	// Skip NumClauses, NumChildren and HasAssociatedStmt fields.
11731	skipInts(N: 3);
11732	}
11733	SmallVector<OMPClause *, 4> Clauses(Data->getNumClauses());
11734	for (unsigned I = 0, E = Data->getNumClauses(); I < E; ++I)
11735	Clauses[I] = readOMPClause();
11736	Data->setClauses(Clauses);
11737	if (Data->hasAssociatedStmt())
11738	Data->setAssociatedStmt(readStmt());
11739	for (unsigned I = 0, E = Data->getNumChildren(); I < E; ++I)
11740	Data->getChildren()[I] = readStmt();
11741	}
11742