1//===--- ASTWriterDecl.cpp - Declaration Serialization --------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file implements serialization for Declarations.
10//
11//===----------------------------------------------------------------------===//
12
13#include "ASTCommon.h"
14#include "clang/AST/Attr.h"
15#include "clang/AST/DeclCXX.h"
16#include "clang/AST/DeclTemplate.h"
17#include "clang/AST/DeclVisitor.h"
18#include "clang/AST/Expr.h"
19#include "clang/AST/OpenMPClause.h"
20#include "clang/AST/PrettyDeclStackTrace.h"
21#include "clang/Basic/SourceManager.h"
22#include "clang/Serialization/ASTReader.h"
23#include "clang/Serialization/ASTRecordWriter.h"
24#include "llvm/Bitstream/BitstreamWriter.h"
25#include "llvm/Support/ErrorHandling.h"
26using namespace clang;
27using namespace serialization;
28
29//===----------------------------------------------------------------------===//
30// Utility functions
31//===----------------------------------------------------------------------===//
32
33namespace {
34
35// Helper function that returns true if the decl passed in the argument is
36// a defintion in dependent contxt.
37template <typename DT> bool isDefinitionInDependentContext(DT *D) {
38 return D->isDependentContext() && D->isThisDeclarationADefinition();
39}
40
41} // namespace
42
43//===----------------------------------------------------------------------===//
44// Declaration serialization
45//===----------------------------------------------------------------------===//
46
47namespace clang {
48 class ASTDeclWriter : public DeclVisitor<ASTDeclWriter, void> {
49 ASTWriter &Writer;
50 ASTRecordWriter Record;
51
52 serialization::DeclCode Code;
53 unsigned AbbrevToUse;
54
55 bool GeneratingReducedBMI = false;
56
57 public:
58 ASTDeclWriter(ASTWriter &Writer, ASTContext &Context,
59 ASTWriter::RecordDataImpl &Record, bool GeneratingReducedBMI)
60 : Writer(Writer), Record(Context, Writer, Record),
61 Code((serialization::DeclCode)0), AbbrevToUse(0),
62 GeneratingReducedBMI(GeneratingReducedBMI) {}
63
64 uint64_t Emit(Decl *D) {
65 if (!Code)
66 llvm::report_fatal_error(reason: StringRef("unexpected declaration kind '") +
67 D->getDeclKindName() + "'");
68 return Record.Emit(Code, Abbrev: AbbrevToUse);
69 }
70
71 void Visit(Decl *D);
72
73 void VisitDecl(Decl *D);
74 void VisitPragmaCommentDecl(PragmaCommentDecl *D);
75 void VisitPragmaDetectMismatchDecl(PragmaDetectMismatchDecl *D);
76 void VisitTranslationUnitDecl(TranslationUnitDecl *D);
77 void VisitNamedDecl(NamedDecl *D);
78 void VisitLabelDecl(LabelDecl *LD);
79 void VisitNamespaceDecl(NamespaceDecl *D);
80 void VisitUsingDirectiveDecl(UsingDirectiveDecl *D);
81 void VisitNamespaceAliasDecl(NamespaceAliasDecl *D);
82 void VisitTypeDecl(TypeDecl *D);
83 void VisitTypedefNameDecl(TypedefNameDecl *D);
84 void VisitTypedefDecl(TypedefDecl *D);
85 void VisitTypeAliasDecl(TypeAliasDecl *D);
86 void VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D);
87 void VisitUnresolvedUsingIfExistsDecl(UnresolvedUsingIfExistsDecl *D);
88 void VisitTagDecl(TagDecl *D);
89 void VisitEnumDecl(EnumDecl *D);
90 void VisitRecordDecl(RecordDecl *D);
91 void VisitCXXRecordDecl(CXXRecordDecl *D);
92 void VisitClassTemplateSpecializationDecl(
93 ClassTemplateSpecializationDecl *D);
94 void VisitClassTemplatePartialSpecializationDecl(
95 ClassTemplatePartialSpecializationDecl *D);
96 void VisitVarTemplateSpecializationDecl(VarTemplateSpecializationDecl *D);
97 void VisitVarTemplatePartialSpecializationDecl(
98 VarTemplatePartialSpecializationDecl *D);
99 void VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D);
100 void VisitValueDecl(ValueDecl *D);
101 void VisitEnumConstantDecl(EnumConstantDecl *D);
102 void VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D);
103 void VisitDeclaratorDecl(DeclaratorDecl *D);
104 void VisitFunctionDecl(FunctionDecl *D);
105 void VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *D);
106 void VisitCXXMethodDecl(CXXMethodDecl *D);
107 void VisitCXXConstructorDecl(CXXConstructorDecl *D);
108 void VisitCXXDestructorDecl(CXXDestructorDecl *D);
109 void VisitCXXConversionDecl(CXXConversionDecl *D);
110 void VisitFieldDecl(FieldDecl *D);
111 void VisitMSPropertyDecl(MSPropertyDecl *D);
112 void VisitMSGuidDecl(MSGuidDecl *D);
113 void VisitUnnamedGlobalConstantDecl(UnnamedGlobalConstantDecl *D);
114 void VisitTemplateParamObjectDecl(TemplateParamObjectDecl *D);
115 void VisitIndirectFieldDecl(IndirectFieldDecl *D);
116 void VisitVarDecl(VarDecl *D);
117 void VisitImplicitParamDecl(ImplicitParamDecl *D);
118 void VisitParmVarDecl(ParmVarDecl *D);
119 void VisitDecompositionDecl(DecompositionDecl *D);
120 void VisitBindingDecl(BindingDecl *D);
121 void VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D);
122 void VisitTemplateDecl(TemplateDecl *D);
123 void VisitConceptDecl(ConceptDecl *D);
124 void VisitImplicitConceptSpecializationDecl(
125 ImplicitConceptSpecializationDecl *D);
126 void VisitRequiresExprBodyDecl(RequiresExprBodyDecl *D);
127 void VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D);
128 void VisitClassTemplateDecl(ClassTemplateDecl *D);
129 void VisitVarTemplateDecl(VarTemplateDecl *D);
130 void VisitFunctionTemplateDecl(FunctionTemplateDecl *D);
131 void VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D);
132 void VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D);
133 void VisitUsingDecl(UsingDecl *D);
134 void VisitUsingEnumDecl(UsingEnumDecl *D);
135 void VisitUsingPackDecl(UsingPackDecl *D);
136 void VisitUsingShadowDecl(UsingShadowDecl *D);
137 void VisitConstructorUsingShadowDecl(ConstructorUsingShadowDecl *D);
138 void VisitLinkageSpecDecl(LinkageSpecDecl *D);
139 void VisitExportDecl(ExportDecl *D);
140 void VisitFileScopeAsmDecl(FileScopeAsmDecl *D);
141 void VisitTopLevelStmtDecl(TopLevelStmtDecl *D);
142 void VisitImportDecl(ImportDecl *D);
143 void VisitAccessSpecDecl(AccessSpecDecl *D);
144 void VisitFriendDecl(FriendDecl *D);
145 void VisitFriendTemplateDecl(FriendTemplateDecl *D);
146 void VisitStaticAssertDecl(StaticAssertDecl *D);
147 void VisitBlockDecl(BlockDecl *D);
148 void VisitOutlinedFunctionDecl(OutlinedFunctionDecl *D);
149 void VisitCapturedDecl(CapturedDecl *D);
150 void VisitEmptyDecl(EmptyDecl *D);
151 void VisitLifetimeExtendedTemporaryDecl(LifetimeExtendedTemporaryDecl *D);
152 void VisitDeclContext(DeclContext *DC);
153 template <typename T> void VisitRedeclarable(Redeclarable<T> *D);
154 void VisitHLSLBufferDecl(HLSLBufferDecl *D);
155
156 // FIXME: Put in the same order is DeclNodes.td?
157 void VisitObjCMethodDecl(ObjCMethodDecl *D);
158 void VisitObjCTypeParamDecl(ObjCTypeParamDecl *D);
159 void VisitObjCContainerDecl(ObjCContainerDecl *D);
160 void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
161 void VisitObjCIvarDecl(ObjCIvarDecl *D);
162 void VisitObjCProtocolDecl(ObjCProtocolDecl *D);
163 void VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D);
164 void VisitObjCCategoryDecl(ObjCCategoryDecl *D);
165 void VisitObjCImplDecl(ObjCImplDecl *D);
166 void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
167 void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
168 void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D);
169 void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
170 void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
171 void VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D);
172 void VisitOMPAllocateDecl(OMPAllocateDecl *D);
173 void VisitOMPRequiresDecl(OMPRequiresDecl *D);
174 void VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D);
175 void VisitOMPDeclareMapperDecl(OMPDeclareMapperDecl *D);
176 void VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D);
177
178 void VisitOpenACCDeclareDecl(OpenACCDeclareDecl *D);
179 void VisitOpenACCRoutineDecl(OpenACCRoutineDecl *D);
180
181 /// Add an Objective-C type parameter list to the given record.
182 void AddObjCTypeParamList(ObjCTypeParamList *typeParams) {
183 // Empty type parameter list.
184 if (!typeParams) {
185 Record.push_back(N: 0);
186 return;
187 }
188
189 Record.push_back(N: typeParams->size());
190 for (auto *typeParam : *typeParams) {
191 Record.AddDeclRef(D: typeParam);
192 }
193 Record.AddSourceLocation(Loc: typeParams->getLAngleLoc());
194 Record.AddSourceLocation(Loc: typeParams->getRAngleLoc());
195 }
196
197 /// Collect the first declaration from each module file that provides a
198 /// declaration of D.
199 void CollectFirstDeclFromEachModule(
200 const Decl *D, bool IncludeLocal,
201 llvm::MapVector<ModuleFile *, const Decl *> &Firsts) {
202
203 // FIXME: We can skip entries that we know are implied by others.
204 for (const Decl *R = D->getMostRecentDecl(); R; R = R->getPreviousDecl()) {
205 if (R->isFromASTFile())
206 Firsts[Writer.Chain->getOwningModuleFile(D: R)] = R;
207 else if (IncludeLocal)
208 Firsts[nullptr] = R;
209 }
210 }
211
212 /// Add to the record the first declaration from each module file that
213 /// provides a declaration of D. The intent is to provide a sufficient
214 /// set such that reloading this set will load all current redeclarations.
215 void AddFirstDeclFromEachModule(const Decl *D, bool IncludeLocal) {
216 llvm::MapVector<ModuleFile *, const Decl *> Firsts;
217 CollectFirstDeclFromEachModule(D, IncludeLocal, Firsts);
218
219 for (const auto &F : Firsts)
220 Record.AddDeclRef(D: F.second);
221 }
222
223 template <typename T> bool shouldSkipWritingSpecializations(T *Spec) {
224 // Now we will only avoid writing specializations if we're generating
225 // reduced BMI.
226 if (!GeneratingReducedBMI)
227 return false;
228
229 assert((isa<FunctionDecl, ClassTemplateSpecializationDecl,
230 VarTemplateSpecializationDecl>(Spec)));
231
232 ArrayRef<TemplateArgument> Args;
233 if (auto *CTSD = dyn_cast<ClassTemplateSpecializationDecl>(Spec))
234 Args = CTSD->getTemplateArgs().asArray();
235 else if (auto *VTSD = dyn_cast<VarTemplateSpecializationDecl>(Spec))
236 Args = VTSD->getTemplateArgs().asArray();
237 else
238 Args = cast<FunctionDecl>(Spec)
239 ->getTemplateSpecializationArgs()
240 ->asArray();
241
242 // If there is any template argument is TULocal, we can avoid writing the
243 // specialization since the consumers of reduced BMI won't get the
244 // specialization anyway.
245 for (const TemplateArgument &TA : Args) {
246 switch (TA.getKind()) {
247 case TemplateArgument::Type: {
248 Linkage L = TA.getAsType()->getLinkage();
249 if (!isExternallyVisible(L))
250 return true;
251 break;
252 }
253 case TemplateArgument::Declaration:
254 if (!TA.getAsDecl()->isExternallyVisible())
255 return true;
256 break;
257 default:
258 break;
259 }
260 }
261
262 return false;
263 }
264
265 /// Add to the record the first template specialization from each module
266 /// file that provides a declaration of D. We store the DeclId and an
267 /// ODRHash of the template arguments of D which should provide enough
268 /// information to load D only if the template instantiator needs it.
269 void AddFirstSpecializationDeclFromEachModule(
270 const Decl *D, llvm::SmallVectorImpl<const Decl *> &SpecsInMap,
271 llvm::SmallVectorImpl<const Decl *> &PartialSpecsInMap) {
272 assert((isa<ClassTemplateSpecializationDecl>(D) ||
273 isa<VarTemplateSpecializationDecl>(D) || isa<FunctionDecl>(D)) &&
274 "Must not be called with other decls");
275 llvm::MapVector<ModuleFile *, const Decl *> Firsts;
276 CollectFirstDeclFromEachModule(D, /*IncludeLocal*/ true, Firsts);
277
278 for (const auto &F : Firsts) {
279 if (shouldSkipWritingSpecializations(Spec: F.second))
280 continue;
281
282 if (isa<ClassTemplatePartialSpecializationDecl,
283 VarTemplatePartialSpecializationDecl>(Val: F.second))
284 PartialSpecsInMap.push_back(Elt: F.second);
285 else
286 SpecsInMap.push_back(Elt: F.second);
287 }
288 }
289
290 /// Get the specialization decl from an entry in the specialization list.
291 template <typename EntryType>
292 typename RedeclarableTemplateDecl::SpecEntryTraits<EntryType>::DeclType *
293 getSpecializationDecl(EntryType &T) {
294 return RedeclarableTemplateDecl::SpecEntryTraits<EntryType>::getDecl(&T);
295 }
296
297 /// Get the list of partial specializations from a template's common ptr.
298 template<typename T>
299 decltype(T::PartialSpecializations) &getPartialSpecializations(T *Common) {
300 return Common->PartialSpecializations;
301 }
302 MutableArrayRef<FunctionTemplateSpecializationInfo>
303 getPartialSpecializations(FunctionTemplateDecl::Common *) {
304 return {};
305 }
306
307 template<typename DeclTy>
308 void AddTemplateSpecializations(DeclTy *D) {
309 auto *Common = D->getCommonPtr();
310
311 // If we have any lazy specializations, and the external AST source is
312 // our chained AST reader, we can just write out the DeclIDs. Otherwise,
313 // we need to resolve them to actual declarations.
314 if (Writer.Chain != Record.getASTContext().getExternalSource() &&
315 Writer.Chain && Writer.Chain->haveUnloadedSpecializations(D)) {
316 D->LoadLazySpecializations();
317 assert(!Writer.Chain->haveUnloadedSpecializations(D));
318 }
319
320 // AddFirstSpecializationDeclFromEachModule might trigger deserialization,
321 // invalidating *Specializations iterators.
322 llvm::SmallVector<const Decl *, 16> AllSpecs;
323 for (auto &Entry : Common->Specializations)
324 AllSpecs.push_back(Elt: getSpecializationDecl(Entry));
325 for (auto &Entry : getPartialSpecializations(Common))
326 AllSpecs.push_back(Elt: getSpecializationDecl(Entry));
327
328 llvm::SmallVector<const Decl *, 16> Specs;
329 llvm::SmallVector<const Decl *, 16> PartialSpecs;
330 for (auto *D : AllSpecs) {
331 assert(D->isCanonicalDecl() && "non-canonical decl in set");
332 AddFirstSpecializationDeclFromEachModule(D, SpecsInMap&: Specs, PartialSpecsInMap&: PartialSpecs);
333 }
334
335 Record.AddOffset(BitOffset: Writer.WriteSpecializationInfoLookupTable(
336 D, Specializations&: Specs, /*IsPartial=*/false));
337
338 // Function Template Decl doesn't have partial decls.
339 if (isa<FunctionTemplateDecl>(D)) {
340 assert(PartialSpecs.empty());
341 return;
342 }
343
344 Record.AddOffset(BitOffset: Writer.WriteSpecializationInfoLookupTable(
345 D, Specializations&: PartialSpecs, /*IsPartial=*/true));
346 }
347
348 /// Ensure that this template specialization is associated with the specified
349 /// template on reload.
350 void RegisterTemplateSpecialization(const Decl *Template,
351 const Decl *Specialization) {
352 Template = Template->getCanonicalDecl();
353
354 // If the canonical template is local, we'll write out this specialization
355 // when we emit it.
356 // FIXME: We can do the same thing if there is any local declaration of
357 // the template, to avoid emitting an update record.
358 if (!Template->isFromASTFile())
359 return;
360
361 // We only need to associate the first local declaration of the
362 // specialization. The other declarations will get pulled in by it.
363 if (Writer.getFirstLocalDecl(D: Specialization) != Specialization)
364 return;
365
366 if (isa<ClassTemplatePartialSpecializationDecl,
367 VarTemplatePartialSpecializationDecl>(Val: Specialization))
368 Writer.PartialSpecializationsUpdates[cast<NamedDecl>(Val: Template)]
369 .push_back(Elt: cast<NamedDecl>(Val: Specialization));
370 else
371 Writer.SpecializationsUpdates[cast<NamedDecl>(Val: Template)].push_back(
372 Elt: cast<NamedDecl>(Val: Specialization));
373 }
374 };
375}
376
377// When building a C++20 module interface unit or a partition unit, a
378// strong definition in the module interface is provided by the
379// compilation of that unit, not by its users. (Inline variables are still
380// emitted in module users.)
381static bool shouldVarGenerateHereOnly(const VarDecl *VD) {
382 if (VD->getStorageDuration() != SD_Static)
383 return false;
384
385 if (VD->getDescribedVarTemplate())
386 return false;
387
388 Module *M = VD->getOwningModule();
389 if (!M)
390 return false;
391
392 M = M->getTopLevelModule();
393 ASTContext &Ctx = VD->getASTContext();
394 if (!M->isInterfaceOrPartition() &&
395 (!VD->hasAttr<DLLExportAttr>() ||
396 !Ctx.getLangOpts().BuildingPCHWithObjectFile))
397 return false;
398
399 return Ctx.GetGVALinkageForVariable(VD) >= GVA_StrongExternal;
400}
401
402static bool shouldFunctionGenerateHereOnly(const FunctionDecl *FD) {
403 if (FD->isDependentContext())
404 return false;
405
406 ASTContext &Ctx = FD->getASTContext();
407 auto Linkage = Ctx.GetGVALinkageForFunction(FD);
408 if (Ctx.getLangOpts().ModulesCodegen ||
409 (FD->hasAttr<DLLExportAttr>() &&
410 Ctx.getLangOpts().BuildingPCHWithObjectFile))
411 // Under -fmodules-codegen, codegen is performed for all non-internal,
412 // non-always_inline functions, unless they are available elsewhere.
413 if (!FD->hasAttr<AlwaysInlineAttr>() && Linkage != GVA_Internal &&
414 Linkage != GVA_AvailableExternally)
415 return true;
416
417 Module *M = FD->getOwningModule();
418 if (!M)
419 return false;
420
421 M = M->getTopLevelModule();
422 if (M->isInterfaceOrPartition())
423 if (Linkage >= GVA_StrongExternal)
424 return true;
425
426 return false;
427}
428
429bool clang::CanElideDeclDef(const Decl *D) {
430 if (auto *FD = dyn_cast<FunctionDecl>(Val: D)) {
431 if (FD->isInlined() || FD->isConstexpr() || FD->isConsteval())
432 return false;
433
434 // If the function should be generated somewhere else, we shouldn't elide
435 // it.
436 if (!shouldFunctionGenerateHereOnly(FD))
437 return false;
438 }
439
440 if (auto *VD = dyn_cast<VarDecl>(Val: D)) {
441 if (VD->getDeclContext()->isDependentContext())
442 return false;
443
444 // Constant initialized variable may not affect the ABI, but they
445 // may be used in constant evaluation in the frontend, so we have
446 // to remain them.
447 if (VD->hasConstantInitialization() || VD->isConstexpr())
448 return false;
449
450 // If the variable should be generated somewhere else, we shouldn't elide
451 // it.
452 if (!shouldVarGenerateHereOnly(VD))
453 return false;
454 }
455
456 return true;
457}
458
459void ASTDeclWriter::Visit(Decl *D) {
460 DeclVisitor<ASTDeclWriter>::Visit(D);
461
462 // Source locations require array (variable-length) abbreviations. The
463 // abbreviation infrastructure requires that arrays are encoded last, so
464 // we handle it here in the case of those classes derived from DeclaratorDecl
465 if (auto *DD = dyn_cast<DeclaratorDecl>(Val: D)) {
466 if (auto *TInfo = DD->getTypeSourceInfo())
467 Record.AddTypeLoc(TL: TInfo->getTypeLoc());
468 }
469
470 // Handle FunctionDecl's body here and write it after all other Stmts/Exprs
471 // have been written. We want it last because we will not read it back when
472 // retrieving it from the AST, we'll just lazily set the offset.
473 if (auto *FD = dyn_cast<FunctionDecl>(Val: D)) {
474 if (!GeneratingReducedBMI || !CanElideDeclDef(D: FD)) {
475 Record.push_back(N: FD->doesThisDeclarationHaveABody());
476 if (FD->doesThisDeclarationHaveABody())
477 Record.AddFunctionDefinition(FD);
478 } else
479 Record.push_back(N: 0);
480 }
481
482 // Similar to FunctionDecls, handle VarDecl's initializer here and write it
483 // after all other Stmts/Exprs. We will not read the initializer until after
484 // we have finished recursive deserialization, because it can recursively
485 // refer back to the variable.
486 if (auto *VD = dyn_cast<VarDecl>(Val: D)) {
487 if (!GeneratingReducedBMI || !CanElideDeclDef(D: VD))
488 Record.AddVarDeclInit(VD);
489 else
490 Record.push_back(N: 0);
491 }
492
493 // And similarly for FieldDecls. We already serialized whether there is a
494 // default member initializer.
495 if (auto *FD = dyn_cast<FieldDecl>(Val: D)) {
496 if (FD->hasInClassInitializer()) {
497 if (Expr *Init = FD->getInClassInitializer()) {
498 Record.push_back(N: 1);
499 Record.AddStmt(S: Init);
500 } else {
501 Record.push_back(N: 0);
502 // Initializer has not been instantiated yet.
503 }
504 }
505 }
506
507 // If this declaration is also a DeclContext, write blocks for the
508 // declarations that lexically stored inside its context and those
509 // declarations that are visible from its context.
510 if (auto *DC = dyn_cast<DeclContext>(Val: D))
511 VisitDeclContext(DC);
512}
513
514void ASTDeclWriter::VisitDecl(Decl *D) {
515 BitsPacker DeclBits;
516
517 // The order matters here. It will be better to put the bit with higher
518 // probability to be 0 in the end of the bits.
519 //
520 // Since we're using VBR6 format to store it.
521 // It will be pretty effient if all the higher bits are 0.
522 // For example, if we need to pack 8 bits into a value and the stored value
523 // is 0xf0, the actual stored value will be 0b000111'110000, which takes 12
524 // bits actually. However, if we changed the order to be 0x0f, then we can
525 // store it as 0b001111, which takes 6 bits only now.
526 DeclBits.addBits(Value: (uint64_t)D->getModuleOwnershipKind(), /*BitWidth=*/BitsWidth: 3);
527 DeclBits.addBit(Value: D->isReferenced());
528 DeclBits.addBit(Value: D->isUsed(CheckUsedAttr: false));
529 DeclBits.addBits(Value: D->getAccess(), /*BitWidth=*/BitsWidth: 2);
530 DeclBits.addBit(Value: D->isImplicit());
531 DeclBits.addBit(Value: D->getDeclContext() != D->getLexicalDeclContext());
532 DeclBits.addBit(Value: D->hasAttrs());
533 DeclBits.addBit(Value: D->isTopLevelDeclInObjCContainer());
534 DeclBits.addBit(Value: D->isInvalidDecl());
535 Record.push_back(N: DeclBits);
536
537 Record.AddDeclRef(D: cast_or_null<Decl>(Val: D->getDeclContext()));
538 if (D->getDeclContext() != D->getLexicalDeclContext())
539 Record.AddDeclRef(D: cast_or_null<Decl>(Val: D->getLexicalDeclContext()));
540
541 if (D->hasAttrs())
542 Record.AddAttributes(Attrs: D->getAttrs());
543
544 Record.push_back(N: Writer.getSubmoduleID(Mod: D->getOwningModule()));
545
546 // If this declaration injected a name into a context different from its
547 // lexical context, and that context is an imported namespace, we need to
548 // update its visible declarations to include this name.
549 //
550 // This happens when we instantiate a class with a friend declaration or a
551 // function with a local extern declaration, for instance.
552 //
553 // FIXME: Can we handle this in AddedVisibleDecl instead?
554 if (D->isOutOfLine()) {
555 auto *DC = D->getDeclContext();
556 while (auto *NS = dyn_cast<NamespaceDecl>(Val: DC->getRedeclContext())) {
557 if (!NS->isFromASTFile())
558 break;
559 Writer.UpdatedDeclContexts.insert(X: NS->getPrimaryContext());
560 if (!NS->isInlineNamespace())
561 break;
562 DC = NS->getParent();
563 }
564 }
565}
566
567void ASTDeclWriter::VisitPragmaCommentDecl(PragmaCommentDecl *D) {
568 StringRef Arg = D->getArg();
569 Record.push_back(N: Arg.size());
570 VisitDecl(D);
571 Record.AddSourceLocation(Loc: D->getBeginLoc());
572 Record.push_back(N: D->getCommentKind());
573 Record.AddString(Str: Arg);
574 Code = serialization::DECL_PRAGMA_COMMENT;
575}
576
577void ASTDeclWriter::VisitPragmaDetectMismatchDecl(
578 PragmaDetectMismatchDecl *D) {
579 StringRef Name = D->getName();
580 StringRef Value = D->getValue();
581 Record.push_back(N: Name.size() + 1 + Value.size());
582 VisitDecl(D);
583 Record.AddSourceLocation(Loc: D->getBeginLoc());
584 Record.AddString(Str: Name);
585 Record.AddString(Str: Value);
586 Code = serialization::DECL_PRAGMA_DETECT_MISMATCH;
587}
588
589void ASTDeclWriter::VisitTranslationUnitDecl(TranslationUnitDecl *D) {
590 llvm_unreachable("Translation units aren't directly serialized");
591}
592
593void ASTDeclWriter::VisitNamedDecl(NamedDecl *D) {
594 VisitDecl(D);
595 Record.AddDeclarationName(Name: D->getDeclName());
596 Record.push_back(N: needsAnonymousDeclarationNumber(D)
597 ? Writer.getAnonymousDeclarationNumber(D)
598 : 0);
599}
600
601void ASTDeclWriter::VisitTypeDecl(TypeDecl *D) {
602 VisitNamedDecl(D);
603 Record.AddSourceLocation(Loc: D->getBeginLoc());
604 Record.AddTypeRef(T: QualType(D->getTypeForDecl(), 0));
605}
606
607void ASTDeclWriter::VisitTypedefNameDecl(TypedefNameDecl *D) {
608 VisitRedeclarable(D);
609 VisitTypeDecl(D);
610 Record.AddTypeSourceInfo(TInfo: D->getTypeSourceInfo());
611 Record.push_back(N: D->isModed());
612 if (D->isModed())
613 Record.AddTypeRef(T: D->getUnderlyingType());
614 Record.AddDeclRef(D: D->getAnonDeclWithTypedefName(AnyRedecl: false));
615}
616
617void ASTDeclWriter::VisitTypedefDecl(TypedefDecl *D) {
618 VisitTypedefNameDecl(D);
619 if (D->getDeclContext() == D->getLexicalDeclContext() &&
620 !D->hasAttrs() &&
621 !D->isImplicit() &&
622 D->getFirstDecl() == D->getMostRecentDecl() &&
623 !D->isInvalidDecl() &&
624 !D->isTopLevelDeclInObjCContainer() &&
625 !D->isModulePrivate() &&
626 !needsAnonymousDeclarationNumber(D) &&
627 D->getDeclName().getNameKind() == DeclarationName::Identifier)
628 AbbrevToUse = Writer.getDeclTypedefAbbrev();
629
630 Code = serialization::DECL_TYPEDEF;
631}
632
633void ASTDeclWriter::VisitTypeAliasDecl(TypeAliasDecl *D) {
634 VisitTypedefNameDecl(D);
635 Record.AddDeclRef(D: D->getDescribedAliasTemplate());
636 Code = serialization::DECL_TYPEALIAS;
637}
638
639void ASTDeclWriter::VisitTagDecl(TagDecl *D) {
640 static_assert(DeclContext::NumTagDeclBits == 23,
641 "You need to update the serializer after you change the "
642 "TagDeclBits");
643
644 VisitRedeclarable(D);
645 VisitTypeDecl(D);
646 Record.push_back(N: D->getIdentifierNamespace());
647
648 BitsPacker TagDeclBits;
649 TagDeclBits.addBits(Value: llvm::to_underlying(E: D->getTagKind()), /*BitWidth=*/BitsWidth: 3);
650 TagDeclBits.addBit(Value: !isa<CXXRecordDecl>(Val: D) ? D->isCompleteDefinition() : 0);
651 TagDeclBits.addBit(Value: D->isEmbeddedInDeclarator());
652 TagDeclBits.addBit(Value: D->isFreeStanding());
653 TagDeclBits.addBit(Value: D->isCompleteDefinitionRequired());
654 TagDeclBits.addBits(
655 Value: D->hasExtInfo() ? 1 : (D->getTypedefNameForAnonDecl() ? 2 : 0),
656 /*BitWidth=*/BitsWidth: 2);
657 Record.push_back(N: TagDeclBits);
658
659 Record.AddSourceRange(Range: D->getBraceRange());
660
661 if (D->hasExtInfo()) {
662 Record.AddQualifierInfo(Info: *D->getExtInfo());
663 } else if (auto *TD = D->getTypedefNameForAnonDecl()) {
664 Record.AddDeclRef(D: TD);
665 Record.AddIdentifierRef(II: TD->getDeclName().getAsIdentifierInfo());
666 }
667}
668
669void ASTDeclWriter::VisitEnumDecl(EnumDecl *D) {
670 static_assert(DeclContext::NumEnumDeclBits == 43,
671 "You need to update the serializer after you change the "
672 "EnumDeclBits");
673
674 VisitTagDecl(D);
675 Record.AddTypeSourceInfo(TInfo: D->getIntegerTypeSourceInfo());
676 if (!D->getIntegerTypeSourceInfo())
677 Record.AddTypeRef(T: D->getIntegerType());
678 Record.AddTypeRef(T: D->getPromotionType());
679
680 BitsPacker EnumDeclBits;
681 EnumDeclBits.addBits(Value: D->getNumPositiveBits(), /*BitWidth=*/BitsWidth: 8);
682 EnumDeclBits.addBits(Value: D->getNumNegativeBits(), /*BitWidth=*/BitsWidth: 8);
683 EnumDeclBits.addBit(Value: D->isScoped());
684 EnumDeclBits.addBit(Value: D->isScopedUsingClassTag());
685 EnumDeclBits.addBit(Value: D->isFixed());
686 Record.push_back(N: EnumDeclBits);
687
688 Record.push_back(N: D->getODRHash());
689
690 if (MemberSpecializationInfo *MemberInfo = D->getMemberSpecializationInfo()) {
691 Record.AddDeclRef(D: MemberInfo->getInstantiatedFrom());
692 Record.push_back(N: MemberInfo->getTemplateSpecializationKind());
693 Record.AddSourceLocation(Loc: MemberInfo->getPointOfInstantiation());
694 } else {
695 Record.AddDeclRef(D: nullptr);
696 }
697
698 if (D->getDeclContext() == D->getLexicalDeclContext() && !D->hasAttrs() &&
699 !D->isInvalidDecl() && !D->isImplicit() && !D->hasExtInfo() &&
700 !D->getTypedefNameForAnonDecl() &&
701 D->getFirstDecl() == D->getMostRecentDecl() &&
702 !D->isTopLevelDeclInObjCContainer() &&
703 !CXXRecordDecl::classofKind(K: D->getKind()) &&
704 !D->getIntegerTypeSourceInfo() && !D->getMemberSpecializationInfo() &&
705 !needsAnonymousDeclarationNumber(D) &&
706 D->getDeclName().getNameKind() == DeclarationName::Identifier)
707 AbbrevToUse = Writer.getDeclEnumAbbrev();
708
709 Code = serialization::DECL_ENUM;
710}
711
712void ASTDeclWriter::VisitRecordDecl(RecordDecl *D) {
713 static_assert(DeclContext::NumRecordDeclBits == 64,
714 "You need to update the serializer after you change the "
715 "RecordDeclBits");
716
717 VisitTagDecl(D);
718
719 BitsPacker RecordDeclBits;
720 RecordDeclBits.addBit(Value: D->hasFlexibleArrayMember());
721 RecordDeclBits.addBit(Value: D->isAnonymousStructOrUnion());
722 RecordDeclBits.addBit(Value: D->hasObjectMember());
723 RecordDeclBits.addBit(Value: D->hasVolatileMember());
724 RecordDeclBits.addBit(Value: D->isNonTrivialToPrimitiveDefaultInitialize());
725 RecordDeclBits.addBit(Value: D->isNonTrivialToPrimitiveCopy());
726 RecordDeclBits.addBit(Value: D->isNonTrivialToPrimitiveDestroy());
727 RecordDeclBits.addBit(Value: D->hasNonTrivialToPrimitiveDefaultInitializeCUnion());
728 RecordDeclBits.addBit(Value: D->hasNonTrivialToPrimitiveDestructCUnion());
729 RecordDeclBits.addBit(Value: D->hasNonTrivialToPrimitiveCopyCUnion());
730 RecordDeclBits.addBit(Value: D->hasUninitializedExplicitInitFields());
731 RecordDeclBits.addBit(Value: D->isParamDestroyedInCallee());
732 RecordDeclBits.addBits(Value: llvm::to_underlying(E: D->getArgPassingRestrictions()), BitsWidth: 2);
733 Record.push_back(N: RecordDeclBits);
734
735 // Only compute this for C/Objective-C, in C++ this is computed as part
736 // of CXXRecordDecl.
737 if (!isa<CXXRecordDecl>(Val: D))
738 Record.push_back(N: D->getODRHash());
739
740 if (D->getDeclContext() == D->getLexicalDeclContext() && !D->hasAttrs() &&
741 !D->isImplicit() && !D->isInvalidDecl() && !D->hasExtInfo() &&
742 !D->getTypedefNameForAnonDecl() &&
743 D->getFirstDecl() == D->getMostRecentDecl() &&
744 !D->isTopLevelDeclInObjCContainer() &&
745 !CXXRecordDecl::classofKind(K: D->getKind()) &&
746 !needsAnonymousDeclarationNumber(D) &&
747 D->getDeclName().getNameKind() == DeclarationName::Identifier)
748 AbbrevToUse = Writer.getDeclRecordAbbrev();
749
750 Code = serialization::DECL_RECORD;
751}
752
753void ASTDeclWriter::VisitValueDecl(ValueDecl *D) {
754 VisitNamedDecl(D);
755 Record.AddTypeRef(T: D->getType());
756}
757
758void ASTDeclWriter::VisitEnumConstantDecl(EnumConstantDecl *D) {
759 VisitValueDecl(D);
760 Record.push_back(N: D->getInitExpr()? 1 : 0);
761 if (D->getInitExpr())
762 Record.AddStmt(S: D->getInitExpr());
763 Record.AddAPSInt(Value: D->getInitVal());
764
765 Code = serialization::DECL_ENUM_CONSTANT;
766}
767
768void ASTDeclWriter::VisitDeclaratorDecl(DeclaratorDecl *D) {
769 VisitValueDecl(D);
770 Record.AddSourceLocation(Loc: D->getInnerLocStart());
771 Record.push_back(N: D->hasExtInfo());
772 if (D->hasExtInfo()) {
773 DeclaratorDecl::ExtInfo *Info = D->getExtInfo();
774 Record.AddQualifierInfo(Info: *Info);
775 Record.AddStmt(
776 S: const_cast<Expr *>(Info->TrailingRequiresClause.ConstraintExpr));
777 Record.writeUnsignedOrNone(Value: Info->TrailingRequiresClause.ArgPackSubstIndex);
778 }
779 // The location information is deferred until the end of the record.
780 Record.AddTypeRef(T: D->getTypeSourceInfo() ? D->getTypeSourceInfo()->getType()
781 : QualType());
782}
783
784void ASTDeclWriter::VisitFunctionDecl(FunctionDecl *D) {
785 static_assert(DeclContext::NumFunctionDeclBits == 45,
786 "You need to update the serializer after you change the "
787 "FunctionDeclBits");
788
789 VisitRedeclarable(D);
790
791 Record.push_back(N: D->getTemplatedKind());
792 switch (D->getTemplatedKind()) {
793 case FunctionDecl::TK_NonTemplate:
794 break;
795 case FunctionDecl::TK_DependentNonTemplate:
796 Record.AddDeclRef(D: D->getInstantiatedFromDecl());
797 break;
798 case FunctionDecl::TK_FunctionTemplate:
799 Record.AddDeclRef(D: D->getDescribedFunctionTemplate());
800 break;
801 case FunctionDecl::TK_MemberSpecialization: {
802 MemberSpecializationInfo *MemberInfo = D->getMemberSpecializationInfo();
803 Record.AddDeclRef(D: MemberInfo->getInstantiatedFrom());
804 Record.push_back(N: MemberInfo->getTemplateSpecializationKind());
805 Record.AddSourceLocation(Loc: MemberInfo->getPointOfInstantiation());
806 break;
807 }
808 case FunctionDecl::TK_FunctionTemplateSpecialization: {
809 FunctionTemplateSpecializationInfo *
810 FTSInfo = D->getTemplateSpecializationInfo();
811
812 RegisterTemplateSpecialization(Template: FTSInfo->getTemplate(), Specialization: D);
813
814 Record.AddDeclRef(D: FTSInfo->getTemplate());
815 Record.push_back(N: FTSInfo->getTemplateSpecializationKind());
816
817 // Template arguments.
818 Record.AddTemplateArgumentList(TemplateArgs: FTSInfo->TemplateArguments);
819
820 // Template args as written.
821 Record.push_back(N: FTSInfo->TemplateArgumentsAsWritten != nullptr);
822 if (FTSInfo->TemplateArgumentsAsWritten)
823 Record.AddASTTemplateArgumentListInfo(
824 ASTTemplArgList: FTSInfo->TemplateArgumentsAsWritten);
825
826 Record.AddSourceLocation(Loc: FTSInfo->getPointOfInstantiation());
827
828 if (MemberSpecializationInfo *MemberInfo =
829 FTSInfo->getMemberSpecializationInfo()) {
830 Record.push_back(N: 1);
831 Record.AddDeclRef(D: MemberInfo->getInstantiatedFrom());
832 Record.push_back(N: MemberInfo->getTemplateSpecializationKind());
833 Record.AddSourceLocation(Loc: MemberInfo->getPointOfInstantiation());
834 } else {
835 Record.push_back(N: 0);
836 }
837
838 if (D->isCanonicalDecl()) {
839 // Write the template that contains the specializations set. We will
840 // add a FunctionTemplateSpecializationInfo to it when reading.
841 Record.AddDeclRef(D: FTSInfo->getTemplate()->getCanonicalDecl());
842 }
843 break;
844 }
845 case FunctionDecl::TK_DependentFunctionTemplateSpecialization: {
846 DependentFunctionTemplateSpecializationInfo *
847 DFTSInfo = D->getDependentSpecializationInfo();
848
849 // Candidates.
850 Record.push_back(N: DFTSInfo->getCandidates().size());
851 for (FunctionTemplateDecl *FTD : DFTSInfo->getCandidates())
852 Record.AddDeclRef(D: FTD);
853
854 // Templates args.
855 Record.push_back(N: DFTSInfo->TemplateArgumentsAsWritten != nullptr);
856 if (DFTSInfo->TemplateArgumentsAsWritten)
857 Record.AddASTTemplateArgumentListInfo(
858 ASTTemplArgList: DFTSInfo->TemplateArgumentsAsWritten);
859 break;
860 }
861 }
862
863 VisitDeclaratorDecl(D);
864 Record.AddDeclarationNameLoc(DNLoc: D->DNLoc, Name: D->getDeclName());
865 Record.push_back(N: D->getIdentifierNamespace());
866
867 // The order matters here. It will be better to put the bit with higher
868 // probability to be 0 in the end of the bits. See the comments in VisitDecl
869 // for details.
870 BitsPacker FunctionDeclBits;
871 // FIXME: stable encoding
872 FunctionDeclBits.addBits(Value: llvm::to_underlying(E: D->getLinkageInternal()), BitsWidth: 3);
873 FunctionDeclBits.addBits(Value: (uint32_t)D->getStorageClass(), /*BitWidth=*/BitsWidth: 3);
874 FunctionDeclBits.addBit(Value: D->isInlineSpecified());
875 FunctionDeclBits.addBit(Value: D->isInlined());
876 FunctionDeclBits.addBit(Value: D->hasSkippedBody());
877 FunctionDeclBits.addBit(Value: D->isVirtualAsWritten());
878 FunctionDeclBits.addBit(Value: D->isPureVirtual());
879 FunctionDeclBits.addBit(Value: D->hasInheritedPrototype());
880 FunctionDeclBits.addBit(Value: D->hasWrittenPrototype());
881 FunctionDeclBits.addBit(Value: D->isDeletedBit());
882 FunctionDeclBits.addBit(Value: D->isTrivial());
883 FunctionDeclBits.addBit(Value: D->isTrivialForCall());
884 FunctionDeclBits.addBit(Value: D->isDefaulted());
885 FunctionDeclBits.addBit(Value: D->isExplicitlyDefaulted());
886 FunctionDeclBits.addBit(Value: D->isIneligibleOrNotSelected());
887 FunctionDeclBits.addBits(Value: (uint64_t)(D->getConstexprKind()), /*BitWidth=*/BitsWidth: 2);
888 FunctionDeclBits.addBit(Value: D->hasImplicitReturnZero());
889 FunctionDeclBits.addBit(Value: D->isMultiVersion());
890 FunctionDeclBits.addBit(Value: D->isLateTemplateParsed());
891 FunctionDeclBits.addBit(Value: D->isInstantiatedFromMemberTemplate());
892 FunctionDeclBits.addBit(Value: D->FriendConstraintRefersToEnclosingTemplate());
893 FunctionDeclBits.addBit(Value: D->usesSEHTry());
894 FunctionDeclBits.addBit(Value: D->isDestroyingOperatorDelete());
895 FunctionDeclBits.addBit(Value: D->isTypeAwareOperatorNewOrDelete());
896 Record.push_back(N: FunctionDeclBits);
897
898 Record.AddSourceLocation(Loc: D->getEndLoc());
899 if (D->isExplicitlyDefaulted())
900 Record.AddSourceLocation(Loc: D->getDefaultLoc());
901
902 Record.push_back(N: D->getODRHash());
903
904 if (D->isDefaulted() || D->isDeletedAsWritten()) {
905 if (auto *FDI = D->getDefalutedOrDeletedInfo()) {
906 // Store both that there is an DefaultedOrDeletedInfo and whether it
907 // contains a DeletedMessage.
908 StringLiteral *DeletedMessage = FDI->getDeletedMessage();
909 Record.push_back(N: 1 | (DeletedMessage ? 2 : 0));
910 if (DeletedMessage)
911 Record.AddStmt(S: DeletedMessage);
912
913 Record.push_back(N: FDI->getUnqualifiedLookups().size());
914 for (DeclAccessPair P : FDI->getUnqualifiedLookups()) {
915 Record.AddDeclRef(D: P.getDecl());
916 Record.push_back(N: P.getAccess());
917 }
918 } else {
919 Record.push_back(N: 0);
920 }
921 }
922
923 if (D->getFriendObjectKind()) {
924 // For a friend function defined inline within a class template, we have to
925 // force the definition to be the one inside the definition of the template
926 // class. Remember this relation to deserialize them together.
927 if (auto *RD = dyn_cast<CXXRecordDecl>(Val: D->getLexicalParent());
928 RD && isDefinitionInDependentContext(D: RD)) {
929 Writer.RelatedDeclsMap[Writer.GetDeclRef(D: RD)].push_back(
930 Elt: Writer.GetDeclRef(D));
931 }
932 }
933
934 Record.push_back(N: D->param_size());
935 for (auto *P : D->parameters())
936 Record.AddDeclRef(D: P);
937 Code = serialization::DECL_FUNCTION;
938}
939
940static void addExplicitSpecifier(ExplicitSpecifier ES,
941 ASTRecordWriter &Record) {
942 uint64_t Kind = static_cast<uint64_t>(ES.getKind());
943 Kind = Kind << 1 | static_cast<bool>(ES.getExpr());
944 Record.push_back(N: Kind);
945 if (ES.getExpr()) {
946 Record.AddStmt(S: ES.getExpr());
947 }
948}
949
950void ASTDeclWriter::VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *D) {
951 addExplicitSpecifier(ES: D->getExplicitSpecifier(), Record);
952 Record.AddDeclRef(D: D->Ctor);
953 VisitFunctionDecl(D);
954 Record.push_back(N: static_cast<unsigned char>(D->getDeductionCandidateKind()));
955 Record.AddDeclRef(D: D->getSourceDeductionGuide());
956 Record.push_back(
957 N: static_cast<unsigned char>(D->getSourceDeductionGuideKind()));
958 Code = serialization::DECL_CXX_DEDUCTION_GUIDE;
959}
960
961void ASTDeclWriter::VisitObjCMethodDecl(ObjCMethodDecl *D) {
962 static_assert(DeclContext::NumObjCMethodDeclBits == 37,
963 "You need to update the serializer after you change the "
964 "ObjCMethodDeclBits");
965
966 VisitNamedDecl(D);
967 // FIXME: convert to LazyStmtPtr?
968 // Unlike C/C++, method bodies will never be in header files.
969 bool HasBodyStuff = D->getBody() != nullptr;
970 Record.push_back(N: HasBodyStuff);
971 if (HasBodyStuff) {
972 Record.AddStmt(S: D->getBody());
973 }
974 Record.AddDeclRef(D: D->getSelfDecl());
975 Record.AddDeclRef(D: D->getCmdDecl());
976 Record.push_back(N: D->isInstanceMethod());
977 Record.push_back(N: D->isVariadic());
978 Record.push_back(N: D->isPropertyAccessor());
979 Record.push_back(N: D->isSynthesizedAccessorStub());
980 Record.push_back(N: D->isDefined());
981 Record.push_back(N: D->isOverriding());
982 Record.push_back(N: D->hasSkippedBody());
983
984 Record.push_back(N: D->isRedeclaration());
985 Record.push_back(N: D->hasRedeclaration());
986 if (D->hasRedeclaration()) {
987 assert(Record.getASTContext().getObjCMethodRedeclaration(D));
988 Record.AddDeclRef(D: Record.getASTContext().getObjCMethodRedeclaration(MD: D));
989 }
990
991 // FIXME: stable encoding for @required/@optional
992 Record.push_back(N: llvm::to_underlying(E: D->getImplementationControl()));
993 // FIXME: stable encoding for in/out/inout/bycopy/byref/oneway/nullability
994 Record.push_back(N: D->getObjCDeclQualifier());
995 Record.push_back(N: D->hasRelatedResultType());
996 Record.AddTypeRef(T: D->getReturnType());
997 Record.AddTypeSourceInfo(TInfo: D->getReturnTypeSourceInfo());
998 Record.AddSourceLocation(Loc: D->getEndLoc());
999 Record.push_back(N: D->param_size());
1000 for (const auto *P : D->parameters())
1001 Record.AddDeclRef(D: P);
1002
1003 Record.push_back(N: D->getSelLocsKind());
1004 unsigned NumStoredSelLocs = D->getNumStoredSelLocs();
1005 SourceLocation *SelLocs = D->getStoredSelLocs();
1006 Record.push_back(N: NumStoredSelLocs);
1007 for (unsigned i = 0; i != NumStoredSelLocs; ++i)
1008 Record.AddSourceLocation(Loc: SelLocs[i]);
1009
1010 Code = serialization::DECL_OBJC_METHOD;
1011}
1012
1013void ASTDeclWriter::VisitObjCTypeParamDecl(ObjCTypeParamDecl *D) {
1014 VisitTypedefNameDecl(D);
1015 Record.push_back(N: D->Variance);
1016 Record.push_back(N: D->Index);
1017 Record.AddSourceLocation(Loc: D->VarianceLoc);
1018 Record.AddSourceLocation(Loc: D->ColonLoc);
1019
1020 Code = serialization::DECL_OBJC_TYPE_PARAM;
1021}
1022
1023void ASTDeclWriter::VisitObjCContainerDecl(ObjCContainerDecl *D) {
1024 static_assert(DeclContext::NumObjCContainerDeclBits == 64,
1025 "You need to update the serializer after you change the "
1026 "ObjCContainerDeclBits");
1027
1028 VisitNamedDecl(D);
1029 Record.AddSourceLocation(Loc: D->getAtStartLoc());
1030 Record.AddSourceRange(Range: D->getAtEndRange());
1031 // Abstract class (no need to define a stable serialization::DECL code).
1032}
1033
1034void ASTDeclWriter::VisitObjCInterfaceDecl(ObjCInterfaceDecl *D) {
1035 VisitRedeclarable(D);
1036 VisitObjCContainerDecl(D);
1037 Record.AddTypeRef(T: QualType(D->getTypeForDecl(), 0));
1038 AddObjCTypeParamList(typeParams: D->TypeParamList);
1039
1040 Record.push_back(N: D->isThisDeclarationADefinition());
1041 if (D->isThisDeclarationADefinition()) {
1042 // Write the DefinitionData
1043 ObjCInterfaceDecl::DefinitionData &Data = D->data();
1044
1045 Record.AddTypeSourceInfo(TInfo: D->getSuperClassTInfo());
1046 Record.AddSourceLocation(Loc: D->getEndOfDefinitionLoc());
1047 Record.push_back(N: Data.HasDesignatedInitializers);
1048 Record.push_back(N: D->getODRHash());
1049
1050 // Write out the protocols that are directly referenced by the @interface.
1051 Record.push_back(N: Data.ReferencedProtocols.size());
1052 for (const auto *P : D->protocols())
1053 Record.AddDeclRef(D: P);
1054 for (const auto &PL : D->protocol_locs())
1055 Record.AddSourceLocation(Loc: PL);
1056
1057 // Write out the protocols that are transitively referenced.
1058 Record.push_back(N: Data.AllReferencedProtocols.size());
1059 for (ObjCList<ObjCProtocolDecl>::iterator
1060 P = Data.AllReferencedProtocols.begin(),
1061 PEnd = Data.AllReferencedProtocols.end();
1062 P != PEnd; ++P)
1063 Record.AddDeclRef(D: *P);
1064
1065
1066 if (ObjCCategoryDecl *Cat = D->getCategoryListRaw()) {
1067 // Ensure that we write out the set of categories for this class.
1068 Writer.ObjCClassesWithCategories.insert(X: D);
1069
1070 // Make sure that the categories get serialized.
1071 for (; Cat; Cat = Cat->getNextClassCategoryRaw())
1072 (void)Writer.GetDeclRef(D: Cat);
1073 }
1074 }
1075
1076 Code = serialization::DECL_OBJC_INTERFACE;
1077}
1078
1079void ASTDeclWriter::VisitObjCIvarDecl(ObjCIvarDecl *D) {
1080 VisitFieldDecl(D);
1081 // FIXME: stable encoding for @public/@private/@protected/@package
1082 Record.push_back(N: D->getAccessControl());
1083 Record.push_back(N: D->getSynthesize());
1084
1085 if (D->getDeclContext() == D->getLexicalDeclContext() &&
1086 !D->hasAttrs() &&
1087 !D->isImplicit() &&
1088 !D->isUsed(CheckUsedAttr: false) &&
1089 !D->isInvalidDecl() &&
1090 !D->isReferenced() &&
1091 !D->isModulePrivate() &&
1092 !D->getBitWidth() &&
1093 !D->hasExtInfo() &&
1094 D->getDeclName())
1095 AbbrevToUse = Writer.getDeclObjCIvarAbbrev();
1096
1097 Code = serialization::DECL_OBJC_IVAR;
1098}
1099
1100void ASTDeclWriter::VisitObjCProtocolDecl(ObjCProtocolDecl *D) {
1101 VisitRedeclarable(D);
1102 VisitObjCContainerDecl(D);
1103
1104 Record.push_back(N: D->isThisDeclarationADefinition());
1105 if (D->isThisDeclarationADefinition()) {
1106 Record.push_back(N: D->protocol_size());
1107 for (const auto *I : D->protocols())
1108 Record.AddDeclRef(D: I);
1109 for (const auto &PL : D->protocol_locs())
1110 Record.AddSourceLocation(Loc: PL);
1111 Record.push_back(N: D->getODRHash());
1112 }
1113
1114 Code = serialization::DECL_OBJC_PROTOCOL;
1115}
1116
1117void ASTDeclWriter::VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D) {
1118 VisitFieldDecl(D);
1119 Code = serialization::DECL_OBJC_AT_DEFS_FIELD;
1120}
1121
1122void ASTDeclWriter::VisitObjCCategoryDecl(ObjCCategoryDecl *D) {
1123 VisitObjCContainerDecl(D);
1124 Record.AddSourceLocation(Loc: D->getCategoryNameLoc());
1125 Record.AddSourceLocation(Loc: D->getIvarLBraceLoc());
1126 Record.AddSourceLocation(Loc: D->getIvarRBraceLoc());
1127 Record.AddDeclRef(D: D->getClassInterface());
1128 AddObjCTypeParamList(typeParams: D->TypeParamList);
1129 Record.push_back(N: D->protocol_size());
1130 for (const auto *I : D->protocols())
1131 Record.AddDeclRef(D: I);
1132 for (const auto &PL : D->protocol_locs())
1133 Record.AddSourceLocation(Loc: PL);
1134 Code = serialization::DECL_OBJC_CATEGORY;
1135}
1136
1137void ASTDeclWriter::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D) {
1138 VisitNamedDecl(D);
1139 Record.AddDeclRef(D: D->getClassInterface());
1140 Code = serialization::DECL_OBJC_COMPATIBLE_ALIAS;
1141}
1142
1143void ASTDeclWriter::VisitObjCPropertyDecl(ObjCPropertyDecl *D) {
1144 VisitNamedDecl(D);
1145 Record.AddSourceLocation(Loc: D->getAtLoc());
1146 Record.AddSourceLocation(Loc: D->getLParenLoc());
1147 Record.AddTypeRef(T: D->getType());
1148 Record.AddTypeSourceInfo(TInfo: D->getTypeSourceInfo());
1149 // FIXME: stable encoding
1150 Record.push_back(N: (unsigned)D->getPropertyAttributes());
1151 Record.push_back(N: (unsigned)D->getPropertyAttributesAsWritten());
1152 // FIXME: stable encoding
1153 Record.push_back(N: (unsigned)D->getPropertyImplementation());
1154 Record.AddDeclarationName(Name: D->getGetterName());
1155 Record.AddSourceLocation(Loc: D->getGetterNameLoc());
1156 Record.AddDeclarationName(Name: D->getSetterName());
1157 Record.AddSourceLocation(Loc: D->getSetterNameLoc());
1158 Record.AddDeclRef(D: D->getGetterMethodDecl());
1159 Record.AddDeclRef(D: D->getSetterMethodDecl());
1160 Record.AddDeclRef(D: D->getPropertyIvarDecl());
1161 Code = serialization::DECL_OBJC_PROPERTY;
1162}
1163
1164void ASTDeclWriter::VisitObjCImplDecl(ObjCImplDecl *D) {
1165 VisitObjCContainerDecl(D);
1166 Record.AddDeclRef(D: D->getClassInterface());
1167 // Abstract class (no need to define a stable serialization::DECL code).
1168}
1169
1170void ASTDeclWriter::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D) {
1171 VisitObjCImplDecl(D);
1172 Record.AddSourceLocation(Loc: D->getCategoryNameLoc());
1173 Code = serialization::DECL_OBJC_CATEGORY_IMPL;
1174}
1175
1176void ASTDeclWriter::VisitObjCImplementationDecl(ObjCImplementationDecl *D) {
1177 VisitObjCImplDecl(D);
1178 Record.AddDeclRef(D: D->getSuperClass());
1179 Record.AddSourceLocation(Loc: D->getSuperClassLoc());
1180 Record.AddSourceLocation(Loc: D->getIvarLBraceLoc());
1181 Record.AddSourceLocation(Loc: D->getIvarRBraceLoc());
1182 Record.push_back(N: D->hasNonZeroConstructors());
1183 Record.push_back(N: D->hasDestructors());
1184 Record.push_back(N: D->NumIvarInitializers);
1185 if (D->NumIvarInitializers)
1186 Record.AddCXXCtorInitializers(
1187 CtorInits: llvm::ArrayRef(D->init_begin(), D->init_end()));
1188 Code = serialization::DECL_OBJC_IMPLEMENTATION;
1189}
1190
1191void ASTDeclWriter::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D) {
1192 VisitDecl(D);
1193 Record.AddSourceLocation(Loc: D->getBeginLoc());
1194 Record.AddDeclRef(D: D->getPropertyDecl());
1195 Record.AddDeclRef(D: D->getPropertyIvarDecl());
1196 Record.AddSourceLocation(Loc: D->getPropertyIvarDeclLoc());
1197 Record.AddDeclRef(D: D->getGetterMethodDecl());
1198 Record.AddDeclRef(D: D->getSetterMethodDecl());
1199 Record.AddStmt(S: D->getGetterCXXConstructor());
1200 Record.AddStmt(S: D->getSetterCXXAssignment());
1201 Code = serialization::DECL_OBJC_PROPERTY_IMPL;
1202}
1203
1204void ASTDeclWriter::VisitFieldDecl(FieldDecl *D) {
1205 VisitDeclaratorDecl(D);
1206 Record.push_back(N: D->isMutable());
1207
1208 Record.push_back(N: (D->StorageKind << 1) | D->BitField);
1209 if (D->StorageKind == FieldDecl::ISK_CapturedVLAType)
1210 Record.AddTypeRef(T: QualType(D->getCapturedVLAType(), 0));
1211 else if (D->BitField)
1212 Record.AddStmt(S: D->getBitWidth());
1213
1214 if (!D->getDeclName() || D->isPlaceholderVar(LangOpts: Writer.getLangOpts()))
1215 Record.AddDeclRef(
1216 D: Record.getASTContext().getInstantiatedFromUnnamedFieldDecl(Field: D));
1217
1218 if (D->getDeclContext() == D->getLexicalDeclContext() &&
1219 !D->hasAttrs() &&
1220 !D->isImplicit() &&
1221 !D->isUsed(CheckUsedAttr: false) &&
1222 !D->isInvalidDecl() &&
1223 !D->isReferenced() &&
1224 !D->isTopLevelDeclInObjCContainer() &&
1225 !D->isModulePrivate() &&
1226 !D->getBitWidth() &&
1227 !D->hasInClassInitializer() &&
1228 !D->hasCapturedVLAType() &&
1229 !D->hasExtInfo() &&
1230 !ObjCIvarDecl::classofKind(K: D->getKind()) &&
1231 !ObjCAtDefsFieldDecl::classofKind(K: D->getKind()) &&
1232 D->getDeclName())
1233 AbbrevToUse = Writer.getDeclFieldAbbrev();
1234
1235 Code = serialization::DECL_FIELD;
1236}
1237
1238void ASTDeclWriter::VisitMSPropertyDecl(MSPropertyDecl *D) {
1239 VisitDeclaratorDecl(D);
1240 Record.AddIdentifierRef(II: D->getGetterId());
1241 Record.AddIdentifierRef(II: D->getSetterId());
1242 Code = serialization::DECL_MS_PROPERTY;
1243}
1244
1245void ASTDeclWriter::VisitMSGuidDecl(MSGuidDecl *D) {
1246 VisitValueDecl(D);
1247 MSGuidDecl::Parts Parts = D->getParts();
1248 Record.push_back(N: Parts.Part1);
1249 Record.push_back(N: Parts.Part2);
1250 Record.push_back(N: Parts.Part3);
1251 Record.append(begin: std::begin(arr&: Parts.Part4And5), end: std::end(arr&: Parts.Part4And5));
1252 Code = serialization::DECL_MS_GUID;
1253}
1254
1255void ASTDeclWriter::VisitUnnamedGlobalConstantDecl(
1256 UnnamedGlobalConstantDecl *D) {
1257 VisitValueDecl(D);
1258 Record.AddAPValue(Value: D->getValue());
1259 Code = serialization::DECL_UNNAMED_GLOBAL_CONSTANT;
1260}
1261
1262void ASTDeclWriter::VisitTemplateParamObjectDecl(TemplateParamObjectDecl *D) {
1263 VisitValueDecl(D);
1264 Record.AddAPValue(Value: D->getValue());
1265 Code = serialization::DECL_TEMPLATE_PARAM_OBJECT;
1266}
1267
1268void ASTDeclWriter::VisitIndirectFieldDecl(IndirectFieldDecl *D) {
1269 VisitValueDecl(D);
1270 Record.push_back(N: D->getChainingSize());
1271
1272 for (const auto *P : D->chain())
1273 Record.AddDeclRef(D: P);
1274 Code = serialization::DECL_INDIRECTFIELD;
1275}
1276
1277void ASTDeclWriter::VisitVarDecl(VarDecl *D) {
1278 VisitRedeclarable(D);
1279 VisitDeclaratorDecl(D);
1280
1281 // The order matters here. It will be better to put the bit with higher
1282 // probability to be 0 in the end of the bits. See the comments in VisitDecl
1283 // for details.
1284 BitsPacker VarDeclBits;
1285 VarDeclBits.addBits(Value: llvm::to_underlying(E: D->getLinkageInternal()),
1286 /*BitWidth=*/BitsWidth: 3);
1287
1288 bool ModulesCodegen = shouldVarGenerateHereOnly(VD: D);
1289 VarDeclBits.addBit(Value: ModulesCodegen);
1290
1291 VarDeclBits.addBits(Value: D->getStorageClass(), /*BitWidth=*/BitsWidth: 3);
1292 VarDeclBits.addBits(Value: D->getTSCSpec(), /*BitWidth=*/BitsWidth: 2);
1293 VarDeclBits.addBits(Value: D->getInitStyle(), /*BitWidth=*/BitsWidth: 2);
1294 VarDeclBits.addBit(Value: D->isARCPseudoStrong());
1295
1296 bool HasDeducedType = false;
1297 if (!isa<ParmVarDecl>(Val: D)) {
1298 VarDeclBits.addBit(Value: D->isThisDeclarationADemotedDefinition());
1299 VarDeclBits.addBit(Value: D->isExceptionVariable());
1300 VarDeclBits.addBit(Value: D->isNRVOVariable());
1301 VarDeclBits.addBit(Value: D->isCXXForRangeDecl());
1302
1303 VarDeclBits.addBit(Value: D->isInline());
1304 VarDeclBits.addBit(Value: D->isInlineSpecified());
1305 VarDeclBits.addBit(Value: D->isConstexpr());
1306 VarDeclBits.addBit(Value: D->isInitCapture());
1307 VarDeclBits.addBit(Value: D->isPreviousDeclInSameBlockScope());
1308
1309 VarDeclBits.addBit(Value: D->isEscapingByref());
1310 HasDeducedType = D->getType()->getContainedDeducedType();
1311 VarDeclBits.addBit(Value: HasDeducedType);
1312
1313 if (const auto *IPD = dyn_cast<ImplicitParamDecl>(Val: D))
1314 VarDeclBits.addBits(Value: llvm::to_underlying(E: IPD->getParameterKind()),
1315 /*Width=*/BitsWidth: 3);
1316 else
1317 VarDeclBits.addBits(Value: 0, /*Width=*/BitsWidth: 3);
1318
1319 VarDeclBits.addBit(Value: D->isObjCForDecl());
1320 }
1321
1322 Record.push_back(N: VarDeclBits);
1323
1324 if (ModulesCodegen)
1325 Writer.AddDeclRef(D, Record&: Writer.ModularCodegenDecls);
1326
1327 if (D->hasAttr<BlocksAttr>()) {
1328 BlockVarCopyInit Init = Record.getASTContext().getBlockVarCopyInit(VD: D);
1329 Record.AddStmt(S: Init.getCopyExpr());
1330 if (Init.getCopyExpr())
1331 Record.push_back(N: Init.canThrow());
1332 }
1333
1334 enum {
1335 VarNotTemplate = 0, VarTemplate, StaticDataMemberSpecialization
1336 };
1337 if (VarTemplateDecl *TemplD = D->getDescribedVarTemplate()) {
1338 Record.push_back(N: VarTemplate);
1339 Record.AddDeclRef(D: TemplD);
1340 } else if (MemberSpecializationInfo *SpecInfo
1341 = D->getMemberSpecializationInfo()) {
1342 Record.push_back(N: StaticDataMemberSpecialization);
1343 Record.AddDeclRef(D: SpecInfo->getInstantiatedFrom());
1344 Record.push_back(N: SpecInfo->getTemplateSpecializationKind());
1345 Record.AddSourceLocation(Loc: SpecInfo->getPointOfInstantiation());
1346 } else {
1347 Record.push_back(N: VarNotTemplate);
1348 }
1349
1350 if (D->getDeclContext() == D->getLexicalDeclContext() && !D->hasAttrs() &&
1351 !D->isTopLevelDeclInObjCContainer() &&
1352 !needsAnonymousDeclarationNumber(D) &&
1353 D->getDeclName().getNameKind() == DeclarationName::Identifier &&
1354 !D->hasExtInfo() && D->getFirstDecl() == D->getMostRecentDecl() &&
1355 D->getKind() == Decl::Var && !D->isInline() && !D->isConstexpr() &&
1356 !D->isInitCapture() && !D->isPreviousDeclInSameBlockScope() &&
1357 !D->hasInitWithSideEffects() && !D->isEscapingByref() &&
1358 !HasDeducedType && D->getStorageDuration() != SD_Static &&
1359 !D->getDescribedVarTemplate() && !D->getMemberSpecializationInfo() &&
1360 !D->isObjCForDecl() && !isa<ImplicitParamDecl>(Val: D) &&
1361 !D->isEscapingByref())
1362 AbbrevToUse = Writer.getDeclVarAbbrev();
1363
1364 Code = serialization::DECL_VAR;
1365}
1366
1367void ASTDeclWriter::VisitImplicitParamDecl(ImplicitParamDecl *D) {
1368 VisitVarDecl(D);
1369 Code = serialization::DECL_IMPLICIT_PARAM;
1370}
1371
1372void ASTDeclWriter::VisitParmVarDecl(ParmVarDecl *D) {
1373 VisitVarDecl(D);
1374
1375 // See the implementation of `ParmVarDecl::getParameterIndex()`, which may
1376 // exceed the size of the normal bitfield. So it may be better to not pack
1377 // these bits.
1378 Record.push_back(N: D->getFunctionScopeIndex());
1379
1380 BitsPacker ParmVarDeclBits;
1381 ParmVarDeclBits.addBit(Value: D->isObjCMethodParameter());
1382 ParmVarDeclBits.addBits(Value: D->getFunctionScopeDepth(), /*BitsWidth=*/7);
1383 // FIXME: stable encoding
1384 ParmVarDeclBits.addBits(Value: D->getObjCDeclQualifier(), /*BitsWidth=*/7);
1385 ParmVarDeclBits.addBit(Value: D->isKNRPromoted());
1386 ParmVarDeclBits.addBit(Value: D->hasInheritedDefaultArg());
1387 ParmVarDeclBits.addBit(Value: D->hasUninstantiatedDefaultArg());
1388 ParmVarDeclBits.addBit(Value: D->getExplicitObjectParamThisLoc().isValid());
1389 Record.push_back(N: ParmVarDeclBits);
1390
1391 if (D->hasUninstantiatedDefaultArg())
1392 Record.AddStmt(S: D->getUninstantiatedDefaultArg());
1393 if (D->getExplicitObjectParamThisLoc().isValid())
1394 Record.AddSourceLocation(Loc: D->getExplicitObjectParamThisLoc());
1395 Code = serialization::DECL_PARM_VAR;
1396
1397 // If the assumptions about the DECL_PARM_VAR abbrev are true, use it. Here
1398 // we dynamically check for the properties that we optimize for, but don't
1399 // know are true of all PARM_VAR_DECLs.
1400 if (D->getDeclContext() == D->getLexicalDeclContext() && !D->hasAttrs() &&
1401 !D->hasExtInfo() && D->getStorageClass() == 0 && !D->isInvalidDecl() &&
1402 !D->isTopLevelDeclInObjCContainer() &&
1403 D->getInitStyle() == VarDecl::CInit && // Can params have anything else?
1404 D->getInit() == nullptr) // No default expr.
1405 AbbrevToUse = Writer.getDeclParmVarAbbrev();
1406
1407 // Check things we know are true of *every* PARM_VAR_DECL, which is more than
1408 // just us assuming it.
1409 assert(!D->getTSCSpec() && "PARM_VAR_DECL can't use TLS");
1410 assert(!D->isThisDeclarationADemotedDefinition()
1411 && "PARM_VAR_DECL can't be demoted definition.");
1412 assert(D->getAccess() == AS_none && "PARM_VAR_DECL can't be public/private");
1413 assert(!D->isExceptionVariable() && "PARM_VAR_DECL can't be exception var");
1414 assert(D->getPreviousDecl() == nullptr && "PARM_VAR_DECL can't be redecl");
1415 assert(!D->isStaticDataMember() &&
1416 "PARM_VAR_DECL can't be static data member");
1417}
1418
1419void ASTDeclWriter::VisitDecompositionDecl(DecompositionDecl *D) {
1420 // Record the number of bindings first to simplify deserialization.
1421 Record.push_back(N: D->bindings().size());
1422
1423 VisitVarDecl(D);
1424 for (auto *B : D->bindings())
1425 Record.AddDeclRef(D: B);
1426 Code = serialization::DECL_DECOMPOSITION;
1427}
1428
1429void ASTDeclWriter::VisitBindingDecl(BindingDecl *D) {
1430 VisitValueDecl(D);
1431 Record.AddStmt(S: D->getBinding());
1432 Code = serialization::DECL_BINDING;
1433}
1434
1435void ASTDeclWriter::VisitFileScopeAsmDecl(FileScopeAsmDecl *D) {
1436 VisitDecl(D);
1437 Record.AddStmt(S: D->getAsmStringExpr());
1438 Record.AddSourceLocation(Loc: D->getRParenLoc());
1439 Code = serialization::DECL_FILE_SCOPE_ASM;
1440}
1441
1442void ASTDeclWriter::VisitTopLevelStmtDecl(TopLevelStmtDecl *D) {
1443 VisitDecl(D);
1444 Record.AddStmt(S: D->getStmt());
1445 Code = serialization::DECL_TOP_LEVEL_STMT_DECL;
1446}
1447
1448void ASTDeclWriter::VisitEmptyDecl(EmptyDecl *D) {
1449 VisitDecl(D);
1450 Code = serialization::DECL_EMPTY;
1451}
1452
1453void ASTDeclWriter::VisitLifetimeExtendedTemporaryDecl(
1454 LifetimeExtendedTemporaryDecl *D) {
1455 VisitDecl(D);
1456 Record.AddDeclRef(D: D->getExtendingDecl());
1457 Record.AddStmt(S: D->getTemporaryExpr());
1458 Record.push_back(N: static_cast<bool>(D->getValue()));
1459 if (D->getValue())
1460 Record.AddAPValue(Value: *D->getValue());
1461 Record.push_back(N: D->getManglingNumber());
1462 Code = serialization::DECL_LIFETIME_EXTENDED_TEMPORARY;
1463}
1464void ASTDeclWriter::VisitBlockDecl(BlockDecl *D) {
1465 VisitDecl(D);
1466 Record.AddStmt(S: D->getBody());
1467 Record.AddTypeSourceInfo(TInfo: D->getSignatureAsWritten());
1468 Record.push_back(N: D->param_size());
1469 for (ParmVarDecl *P : D->parameters())
1470 Record.AddDeclRef(D: P);
1471 Record.push_back(N: D->isVariadic());
1472 Record.push_back(N: D->blockMissingReturnType());
1473 Record.push_back(N: D->isConversionFromLambda());
1474 Record.push_back(N: D->doesNotEscape());
1475 Record.push_back(N: D->canAvoidCopyToHeap());
1476 Record.push_back(N: D->capturesCXXThis());
1477 Record.push_back(N: D->getNumCaptures());
1478 for (const auto &capture : D->captures()) {
1479 Record.AddDeclRef(D: capture.getVariable());
1480
1481 unsigned flags = 0;
1482 if (capture.isByRef()) flags |= 1;
1483 if (capture.isNested()) flags |= 2;
1484 if (capture.hasCopyExpr()) flags |= 4;
1485 Record.push_back(N: flags);
1486
1487 if (capture.hasCopyExpr()) Record.AddStmt(S: capture.getCopyExpr());
1488 }
1489
1490 Code = serialization::DECL_BLOCK;
1491}
1492
1493void ASTDeclWriter::VisitOutlinedFunctionDecl(OutlinedFunctionDecl *D) {
1494 Record.push_back(N: D->getNumParams());
1495 VisitDecl(D);
1496 for (unsigned I = 0; I < D->getNumParams(); ++I)
1497 Record.AddDeclRef(D: D->getParam(i: I));
1498 Record.push_back(N: D->isNothrow() ? 1 : 0);
1499 Record.AddStmt(S: D->getBody());
1500 Code = serialization::DECL_OUTLINEDFUNCTION;
1501}
1502
1503void ASTDeclWriter::VisitCapturedDecl(CapturedDecl *CD) {
1504 Record.push_back(N: CD->getNumParams());
1505 VisitDecl(D: CD);
1506 Record.push_back(N: CD->getContextParamPosition());
1507 Record.push_back(N: CD->isNothrow() ? 1 : 0);
1508 // Body is stored by VisitCapturedStmt.
1509 for (unsigned I = 0; I < CD->getNumParams(); ++I)
1510 Record.AddDeclRef(D: CD->getParam(i: I));
1511 Code = serialization::DECL_CAPTURED;
1512}
1513
1514void ASTDeclWriter::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
1515 static_assert(DeclContext::NumLinkageSpecDeclBits == 17,
1516 "You need to update the serializer after you change the"
1517 "LinkageSpecDeclBits");
1518
1519 VisitDecl(D);
1520 Record.push_back(N: llvm::to_underlying(E: D->getLanguage()));
1521 Record.AddSourceLocation(Loc: D->getExternLoc());
1522 Record.AddSourceLocation(Loc: D->getRBraceLoc());
1523 Code = serialization::DECL_LINKAGE_SPEC;
1524}
1525
1526void ASTDeclWriter::VisitExportDecl(ExportDecl *D) {
1527 VisitDecl(D);
1528 Record.AddSourceLocation(Loc: D->getRBraceLoc());
1529 Code = serialization::DECL_EXPORT;
1530}
1531
1532void ASTDeclWriter::VisitLabelDecl(LabelDecl *D) {
1533 VisitNamedDecl(D);
1534 Record.AddSourceLocation(Loc: D->getBeginLoc());
1535 Code = serialization::DECL_LABEL;
1536}
1537
1538
1539void ASTDeclWriter::VisitNamespaceDecl(NamespaceDecl *D) {
1540 VisitRedeclarable(D);
1541 VisitNamedDecl(D);
1542
1543 BitsPacker NamespaceDeclBits;
1544 NamespaceDeclBits.addBit(Value: D->isInline());
1545 NamespaceDeclBits.addBit(Value: D->isNested());
1546 Record.push_back(N: NamespaceDeclBits);
1547
1548 Record.AddSourceLocation(Loc: D->getBeginLoc());
1549 Record.AddSourceLocation(Loc: D->getRBraceLoc());
1550
1551 if (D->isFirstDecl())
1552 Record.AddDeclRef(D: D->getAnonymousNamespace());
1553 Code = serialization::DECL_NAMESPACE;
1554
1555 if (Writer.hasChain() && D->isAnonymousNamespace() &&
1556 D == D->getMostRecentDecl()) {
1557 // This is a most recent reopening of the anonymous namespace. If its parent
1558 // is in a previous PCH (or is the TU), mark that parent for update, because
1559 // the original namespace always points to the latest re-opening of its
1560 // anonymous namespace.
1561 Decl *Parent = cast<Decl>(
1562 Val: D->getParent()->getRedeclContext()->getPrimaryContext());
1563 if (Parent->isFromASTFile() || isa<TranslationUnitDecl>(Val: Parent)) {
1564 Writer.DeclUpdates[Parent].push_back(
1565 Elt: ASTWriter::DeclUpdate(DeclUpdateKind::CXXAddedAnonymousNamespace, D));
1566 }
1567 }
1568}
1569
1570void ASTDeclWriter::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
1571 VisitRedeclarable(D);
1572 VisitNamedDecl(D);
1573 Record.AddSourceLocation(Loc: D->getNamespaceLoc());
1574 Record.AddSourceLocation(Loc: D->getTargetNameLoc());
1575 Record.AddNestedNameSpecifierLoc(NNS: D->getQualifierLoc());
1576 Record.AddDeclRef(D: D->getNamespace());
1577 Code = serialization::DECL_NAMESPACE_ALIAS;
1578}
1579
1580void ASTDeclWriter::VisitUsingDecl(UsingDecl *D) {
1581 VisitNamedDecl(D);
1582 Record.AddSourceLocation(Loc: D->getUsingLoc());
1583 Record.AddNestedNameSpecifierLoc(NNS: D->getQualifierLoc());
1584 Record.AddDeclarationNameLoc(DNLoc: D->DNLoc, Name: D->getDeclName());
1585 Record.AddDeclRef(D: D->FirstUsingShadow.getPointer());
1586 Record.push_back(N: D->hasTypename());
1587 Record.AddDeclRef(D: Record.getASTContext().getInstantiatedFromUsingDecl(Inst: D));
1588 Code = serialization::DECL_USING;
1589}
1590
1591void ASTDeclWriter::VisitUsingEnumDecl(UsingEnumDecl *D) {
1592 VisitNamedDecl(D);
1593 Record.AddSourceLocation(Loc: D->getUsingLoc());
1594 Record.AddSourceLocation(Loc: D->getEnumLoc());
1595 Record.AddTypeSourceInfo(TInfo: D->getEnumType());
1596 Record.AddDeclRef(D: D->FirstUsingShadow.getPointer());
1597 Record.AddDeclRef(D: Record.getASTContext().getInstantiatedFromUsingEnumDecl(Inst: D));
1598 Code = serialization::DECL_USING_ENUM;
1599}
1600
1601void ASTDeclWriter::VisitUsingPackDecl(UsingPackDecl *D) {
1602 Record.push_back(N: D->NumExpansions);
1603 VisitNamedDecl(D);
1604 Record.AddDeclRef(D: D->getInstantiatedFromUsingDecl());
1605 for (auto *E : D->expansions())
1606 Record.AddDeclRef(D: E);
1607 Code = serialization::DECL_USING_PACK;
1608}
1609
1610void ASTDeclWriter::VisitUsingShadowDecl(UsingShadowDecl *D) {
1611 VisitRedeclarable(D);
1612 VisitNamedDecl(D);
1613 Record.AddDeclRef(D: D->getTargetDecl());
1614 Record.push_back(N: D->getIdentifierNamespace());
1615 Record.AddDeclRef(D: D->UsingOrNextShadow);
1616 Record.AddDeclRef(
1617 D: Record.getASTContext().getInstantiatedFromUsingShadowDecl(Inst: D));
1618
1619 if (D->getDeclContext() == D->getLexicalDeclContext() &&
1620 D->getFirstDecl() == D->getMostRecentDecl() && !D->hasAttrs() &&
1621 !needsAnonymousDeclarationNumber(D) &&
1622 D->getDeclName().getNameKind() == DeclarationName::Identifier)
1623 AbbrevToUse = Writer.getDeclUsingShadowAbbrev();
1624
1625 Code = serialization::DECL_USING_SHADOW;
1626}
1627
1628void ASTDeclWriter::VisitConstructorUsingShadowDecl(
1629 ConstructorUsingShadowDecl *D) {
1630 VisitUsingShadowDecl(D);
1631 Record.AddDeclRef(D: D->NominatedBaseClassShadowDecl);
1632 Record.AddDeclRef(D: D->ConstructedBaseClassShadowDecl);
1633 Record.push_back(N: D->IsVirtual);
1634 Code = serialization::DECL_CONSTRUCTOR_USING_SHADOW;
1635}
1636
1637void ASTDeclWriter::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
1638 VisitNamedDecl(D);
1639 Record.AddSourceLocation(Loc: D->getUsingLoc());
1640 Record.AddSourceLocation(Loc: D->getNamespaceKeyLocation());
1641 Record.AddNestedNameSpecifierLoc(NNS: D->getQualifierLoc());
1642 Record.AddDeclRef(D: D->getNominatedNamespace());
1643 Record.AddDeclRef(D: dyn_cast<Decl>(Val: D->getCommonAncestor()));
1644 Code = serialization::DECL_USING_DIRECTIVE;
1645}
1646
1647void ASTDeclWriter::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
1648 VisitValueDecl(D);
1649 Record.AddSourceLocation(Loc: D->getUsingLoc());
1650 Record.AddNestedNameSpecifierLoc(NNS: D->getQualifierLoc());
1651 Record.AddDeclarationNameLoc(DNLoc: D->DNLoc, Name: D->getDeclName());
1652 Record.AddSourceLocation(Loc: D->getEllipsisLoc());
1653 Code = serialization::DECL_UNRESOLVED_USING_VALUE;
1654}
1655
1656void ASTDeclWriter::VisitUnresolvedUsingTypenameDecl(
1657 UnresolvedUsingTypenameDecl *D) {
1658 VisitTypeDecl(D);
1659 Record.AddSourceLocation(Loc: D->getTypenameLoc());
1660 Record.AddNestedNameSpecifierLoc(NNS: D->getQualifierLoc());
1661 Record.AddSourceLocation(Loc: D->getEllipsisLoc());
1662 Code = serialization::DECL_UNRESOLVED_USING_TYPENAME;
1663}
1664
1665void ASTDeclWriter::VisitUnresolvedUsingIfExistsDecl(
1666 UnresolvedUsingIfExistsDecl *D) {
1667 VisitNamedDecl(D);
1668 Code = serialization::DECL_UNRESOLVED_USING_IF_EXISTS;
1669}
1670
1671void ASTDeclWriter::VisitCXXRecordDecl(CXXRecordDecl *D) {
1672 VisitRecordDecl(D);
1673
1674 enum {
1675 CXXRecNotTemplate = 0,
1676 CXXRecTemplate,
1677 CXXRecMemberSpecialization,
1678 CXXLambda
1679 };
1680 if (ClassTemplateDecl *TemplD = D->getDescribedClassTemplate()) {
1681 Record.push_back(N: CXXRecTemplate);
1682 Record.AddDeclRef(D: TemplD);
1683 } else if (MemberSpecializationInfo *MSInfo
1684 = D->getMemberSpecializationInfo()) {
1685 Record.push_back(N: CXXRecMemberSpecialization);
1686 Record.AddDeclRef(D: MSInfo->getInstantiatedFrom());
1687 Record.push_back(N: MSInfo->getTemplateSpecializationKind());
1688 Record.AddSourceLocation(Loc: MSInfo->getPointOfInstantiation());
1689 } else if (D->isLambda()) {
1690 // For a lambda, we need some information early for merging.
1691 Record.push_back(N: CXXLambda);
1692 if (auto *Context = D->getLambdaContextDecl()) {
1693 Record.AddDeclRef(D: Context);
1694 Record.push_back(N: D->getLambdaIndexInContext());
1695 } else {
1696 Record.push_back(N: 0);
1697 }
1698 // For lambdas inside template functions, remember the mapping to
1699 // deserialize them together.
1700 if (auto *FD = llvm::dyn_cast_or_null<FunctionDecl>(Val: D->getDeclContext());
1701 FD && isDefinitionInDependentContext(D: FD)) {
1702 Writer.RelatedDeclsMap[Writer.GetDeclRef(D: FD)].push_back(
1703 Elt: Writer.GetDeclRef(D: D->getLambdaCallOperator()));
1704 }
1705 } else {
1706 Record.push_back(N: CXXRecNotTemplate);
1707 }
1708
1709 Record.push_back(N: D->isThisDeclarationADefinition());
1710 if (D->isThisDeclarationADefinition())
1711 Record.AddCXXDefinitionData(D);
1712
1713 if (D->isCompleteDefinition() && D->isInNamedModule())
1714 Writer.AddDeclRef(D, Record&: Writer.ModularCodegenDecls);
1715
1716 // Store (what we currently believe to be) the key function to avoid
1717 // deserializing every method so we can compute it.
1718 //
1719 // FIXME: Avoid adding the key function if the class is defined in
1720 // module purview since in that case the key function is meaningless.
1721 if (D->isCompleteDefinition())
1722 Record.AddDeclRef(D: Record.getASTContext().getCurrentKeyFunction(RD: D));
1723
1724 Code = serialization::DECL_CXX_RECORD;
1725}
1726
1727void ASTDeclWriter::VisitCXXMethodDecl(CXXMethodDecl *D) {
1728 VisitFunctionDecl(D);
1729 if (D->isCanonicalDecl()) {
1730 Record.push_back(N: D->size_overridden_methods());
1731 for (const CXXMethodDecl *MD : D->overridden_methods())
1732 Record.AddDeclRef(D: MD);
1733 } else {
1734 // We only need to record overridden methods once for the canonical decl.
1735 Record.push_back(N: 0);
1736 }
1737
1738 if (D->getDeclContext() == D->getLexicalDeclContext() &&
1739 D->getFirstDecl() == D->getMostRecentDecl() && !D->isInvalidDecl() &&
1740 !D->hasAttrs() && !D->isTopLevelDeclInObjCContainer() &&
1741 D->getDeclName().getNameKind() == DeclarationName::Identifier &&
1742 !D->hasExtInfo() && !D->isExplicitlyDefaulted()) {
1743 if (D->getTemplatedKind() == FunctionDecl::TK_NonTemplate ||
1744 D->getTemplatedKind() == FunctionDecl::TK_FunctionTemplate ||
1745 D->getTemplatedKind() == FunctionDecl::TK_MemberSpecialization ||
1746 D->getTemplatedKind() == FunctionDecl::TK_DependentNonTemplate)
1747 AbbrevToUse = Writer.getDeclCXXMethodAbbrev(Kind: D->getTemplatedKind());
1748 else if (D->getTemplatedKind() ==
1749 FunctionDecl::TK_FunctionTemplateSpecialization) {
1750 FunctionTemplateSpecializationInfo *FTSInfo =
1751 D->getTemplateSpecializationInfo();
1752
1753 if (FTSInfo->TemplateArguments->size() == 1) {
1754 const TemplateArgument &TA = FTSInfo->TemplateArguments->get(Idx: 0);
1755 if (TA.getKind() == TemplateArgument::Type &&
1756 !FTSInfo->TemplateArgumentsAsWritten &&
1757 !FTSInfo->getMemberSpecializationInfo())
1758 AbbrevToUse = Writer.getDeclCXXMethodAbbrev(Kind: D->getTemplatedKind());
1759 }
1760 } else if (D->getTemplatedKind() ==
1761 FunctionDecl::TK_DependentFunctionTemplateSpecialization) {
1762 DependentFunctionTemplateSpecializationInfo *DFTSInfo =
1763 D->getDependentSpecializationInfo();
1764 if (!DFTSInfo->TemplateArgumentsAsWritten)
1765 AbbrevToUse = Writer.getDeclCXXMethodAbbrev(Kind: D->getTemplatedKind());
1766 }
1767 }
1768
1769 Code = serialization::DECL_CXX_METHOD;
1770}
1771
1772void ASTDeclWriter::VisitCXXConstructorDecl(CXXConstructorDecl *D) {
1773 static_assert(DeclContext::NumCXXConstructorDeclBits == 64,
1774 "You need to update the serializer after you change the "
1775 "CXXConstructorDeclBits");
1776
1777 Record.push_back(N: D->getTrailingAllocKind());
1778 addExplicitSpecifier(ES: D->getExplicitSpecifierInternal(), Record);
1779 if (auto Inherited = D->getInheritedConstructor()) {
1780 Record.AddDeclRef(D: Inherited.getShadowDecl());
1781 Record.AddDeclRef(D: Inherited.getConstructor());
1782 }
1783
1784 VisitCXXMethodDecl(D);
1785 Code = serialization::DECL_CXX_CONSTRUCTOR;
1786}
1787
1788void ASTDeclWriter::VisitCXXDestructorDecl(CXXDestructorDecl *D) {
1789 VisitCXXMethodDecl(D);
1790
1791 Record.AddDeclRef(D: D->getOperatorDelete());
1792 if (D->getOperatorDelete())
1793 Record.AddStmt(S: D->getOperatorDeleteThisArg());
1794
1795 Code = serialization::DECL_CXX_DESTRUCTOR;
1796}
1797
1798void ASTDeclWriter::VisitCXXConversionDecl(CXXConversionDecl *D) {
1799 addExplicitSpecifier(ES: D->getExplicitSpecifier(), Record);
1800 VisitCXXMethodDecl(D);
1801 Code = serialization::DECL_CXX_CONVERSION;
1802}
1803
1804void ASTDeclWriter::VisitImportDecl(ImportDecl *D) {
1805 VisitDecl(D);
1806 Record.push_back(N: Writer.getSubmoduleID(Mod: D->getImportedModule()));
1807 ArrayRef<SourceLocation> IdentifierLocs = D->getIdentifierLocs();
1808 Record.push_back(N: !IdentifierLocs.empty());
1809 if (IdentifierLocs.empty()) {
1810 Record.AddSourceLocation(Loc: D->getEndLoc());
1811 Record.push_back(N: 1);
1812 } else {
1813 for (unsigned I = 0, N = IdentifierLocs.size(); I != N; ++I)
1814 Record.AddSourceLocation(Loc: IdentifierLocs[I]);
1815 Record.push_back(N: IdentifierLocs.size());
1816 }
1817 // Note: the number of source locations must always be the last element in
1818 // the record.
1819 Code = serialization::DECL_IMPORT;
1820}
1821
1822void ASTDeclWriter::VisitAccessSpecDecl(AccessSpecDecl *D) {
1823 VisitDecl(D);
1824 Record.AddSourceLocation(Loc: D->getColonLoc());
1825 Code = serialization::DECL_ACCESS_SPEC;
1826}
1827
1828void ASTDeclWriter::VisitFriendDecl(FriendDecl *D) {
1829 // Record the number of friend type template parameter lists here
1830 // so as to simplify memory allocation during deserialization.
1831 Record.push_back(N: D->NumTPLists);
1832 VisitDecl(D);
1833 bool hasFriendDecl = isa<NamedDecl *>(Val: D->Friend);
1834 Record.push_back(N: hasFriendDecl);
1835 if (hasFriendDecl)
1836 Record.AddDeclRef(D: D->getFriendDecl());
1837 else
1838 Record.AddTypeSourceInfo(TInfo: D->getFriendType());
1839 for (unsigned i = 0; i < D->NumTPLists; ++i)
1840 Record.AddTemplateParameterList(TemplateParams: D->getFriendTypeTemplateParameterList(N: i));
1841 Record.AddDeclRef(D: D->getNextFriend());
1842 Record.push_back(N: D->UnsupportedFriend);
1843 Record.AddSourceLocation(Loc: D->FriendLoc);
1844 Record.AddSourceLocation(Loc: D->EllipsisLoc);
1845 Code = serialization::DECL_FRIEND;
1846}
1847
1848void ASTDeclWriter::VisitFriendTemplateDecl(FriendTemplateDecl *D) {
1849 VisitDecl(D);
1850 Record.push_back(N: D->getNumTemplateParameters());
1851 for (unsigned i = 0, e = D->getNumTemplateParameters(); i != e; ++i)
1852 Record.AddTemplateParameterList(TemplateParams: D->getTemplateParameterList(i));
1853 Record.push_back(N: D->getFriendDecl() != nullptr);
1854 if (D->getFriendDecl())
1855 Record.AddDeclRef(D: D->getFriendDecl());
1856 else
1857 Record.AddTypeSourceInfo(TInfo: D->getFriendType());
1858 Record.AddSourceLocation(Loc: D->getFriendLoc());
1859 Code = serialization::DECL_FRIEND_TEMPLATE;
1860}
1861
1862void ASTDeclWriter::VisitTemplateDecl(TemplateDecl *D) {
1863 VisitNamedDecl(D);
1864
1865 Record.AddTemplateParameterList(TemplateParams: D->getTemplateParameters());
1866 Record.AddDeclRef(D: D->getTemplatedDecl());
1867}
1868
1869void ASTDeclWriter::VisitConceptDecl(ConceptDecl *D) {
1870 VisitTemplateDecl(D);
1871 Record.AddStmt(S: D->getConstraintExpr());
1872 Code = serialization::DECL_CONCEPT;
1873}
1874
1875void ASTDeclWriter::VisitImplicitConceptSpecializationDecl(
1876 ImplicitConceptSpecializationDecl *D) {
1877 Record.push_back(N: D->getTemplateArguments().size());
1878 VisitDecl(D);
1879 for (const TemplateArgument &Arg : D->getTemplateArguments())
1880 Record.AddTemplateArgument(Arg);
1881 Code = serialization::DECL_IMPLICIT_CONCEPT_SPECIALIZATION;
1882}
1883
1884void ASTDeclWriter::VisitRequiresExprBodyDecl(RequiresExprBodyDecl *D) {
1885 Code = serialization::DECL_REQUIRES_EXPR_BODY;
1886}
1887
1888void ASTDeclWriter::VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D) {
1889 VisitRedeclarable(D);
1890
1891 // Emit data to initialize CommonOrPrev before VisitTemplateDecl so that
1892 // getCommonPtr() can be used while this is still initializing.
1893 if (D->isFirstDecl()) {
1894 // This declaration owns the 'common' pointer, so serialize that data now.
1895 Record.AddDeclRef(D: D->getInstantiatedFromMemberTemplate());
1896 if (D->getInstantiatedFromMemberTemplate())
1897 Record.push_back(N: D->isMemberSpecialization());
1898 }
1899
1900 VisitTemplateDecl(D);
1901 Record.push_back(N: D->getIdentifierNamespace());
1902}
1903
1904void ASTDeclWriter::VisitClassTemplateDecl(ClassTemplateDecl *D) {
1905 VisitRedeclarableTemplateDecl(D);
1906
1907 if (D->isFirstDecl())
1908 AddTemplateSpecializations(D);
1909
1910 // Force emitting the corresponding deduction guide in reduced BMI mode.
1911 // Otherwise, the deduction guide may be optimized out incorrectly.
1912 if (Writer.isGeneratingReducedBMI()) {
1913 auto Name =
1914 Record.getASTContext().DeclarationNames.getCXXDeductionGuideName(TD: D);
1915 for (auto *DG : D->getDeclContext()->noload_lookup(Name))
1916 Writer.GetDeclRef(D: DG->getCanonicalDecl());
1917 }
1918
1919 Code = serialization::DECL_CLASS_TEMPLATE;
1920}
1921
1922void ASTDeclWriter::VisitClassTemplateSpecializationDecl(
1923 ClassTemplateSpecializationDecl *D) {
1924 RegisterTemplateSpecialization(Template: D->getSpecializedTemplate(), Specialization: D);
1925
1926 VisitCXXRecordDecl(D);
1927
1928 llvm::PointerUnion<ClassTemplateDecl *,
1929 ClassTemplatePartialSpecializationDecl *> InstFrom
1930 = D->getSpecializedTemplateOrPartial();
1931 if (Decl *InstFromD = InstFrom.dyn_cast<ClassTemplateDecl *>()) {
1932 Record.AddDeclRef(D: InstFromD);
1933 } else {
1934 Record.AddDeclRef(D: cast<ClassTemplatePartialSpecializationDecl *>(Val&: InstFrom));
1935 Record.AddTemplateArgumentList(TemplateArgs: &D->getTemplateInstantiationArgs());
1936 }
1937
1938 Record.AddTemplateArgumentList(TemplateArgs: &D->getTemplateArgs());
1939 Record.AddSourceLocation(Loc: D->getPointOfInstantiation());
1940 Record.push_back(N: D->getSpecializationKind());
1941 Record.push_back(N: D->hasStrictPackMatch());
1942 Record.push_back(N: D->isCanonicalDecl());
1943
1944 if (D->isCanonicalDecl()) {
1945 // When reading, we'll add it to the folding set of the following template.
1946 Record.AddDeclRef(D: D->getSpecializedTemplate()->getCanonicalDecl());
1947 }
1948
1949 bool ExplicitInstantiation =
1950 D->getTemplateSpecializationKind() ==
1951 TSK_ExplicitInstantiationDeclaration ||
1952 D->getTemplateSpecializationKind() == TSK_ExplicitInstantiationDefinition;
1953 Record.push_back(N: ExplicitInstantiation);
1954 if (ExplicitInstantiation) {
1955 Record.AddSourceLocation(Loc: D->getExternKeywordLoc());
1956 Record.AddSourceLocation(Loc: D->getTemplateKeywordLoc());
1957 }
1958
1959 const ASTTemplateArgumentListInfo *ArgsWritten =
1960 D->getTemplateArgsAsWritten();
1961 Record.push_back(N: !!ArgsWritten);
1962 if (ArgsWritten)
1963 Record.AddASTTemplateArgumentListInfo(ASTTemplArgList: ArgsWritten);
1964
1965 // Mention the implicitly generated C++ deduction guide to make sure the
1966 // deduction guide will be rewritten as expected.
1967 //
1968 // FIXME: Would it be more efficient to add a callback register function
1969 // in sema to register the deduction guide?
1970 if (Writer.isWritingStdCXXNamedModules()) {
1971 auto Name =
1972 Record.getASTContext().DeclarationNames.getCXXDeductionGuideName(
1973 TD: D->getSpecializedTemplate());
1974 for (auto *DG : D->getDeclContext()->noload_lookup(Name))
1975 Writer.GetDeclRef(D: DG->getCanonicalDecl());
1976 }
1977
1978 Code = serialization::DECL_CLASS_TEMPLATE_SPECIALIZATION;
1979}
1980
1981void ASTDeclWriter::VisitClassTemplatePartialSpecializationDecl(
1982 ClassTemplatePartialSpecializationDecl *D) {
1983 Record.AddTemplateParameterList(TemplateParams: D->getTemplateParameters());
1984
1985 VisitClassTemplateSpecializationDecl(D);
1986
1987 // These are read/set from/to the first declaration.
1988 if (D->getPreviousDecl() == nullptr) {
1989 Record.AddDeclRef(D: D->getInstantiatedFromMember());
1990 Record.push_back(N: D->isMemberSpecialization());
1991 }
1992
1993 Code = serialization::DECL_CLASS_TEMPLATE_PARTIAL_SPECIALIZATION;
1994}
1995
1996void ASTDeclWriter::VisitVarTemplateDecl(VarTemplateDecl *D) {
1997 VisitRedeclarableTemplateDecl(D);
1998
1999 if (D->isFirstDecl())
2000 AddTemplateSpecializations(D);
2001 Code = serialization::DECL_VAR_TEMPLATE;
2002}
2003
2004void ASTDeclWriter::VisitVarTemplateSpecializationDecl(
2005 VarTemplateSpecializationDecl *D) {
2006 RegisterTemplateSpecialization(Template: D->getSpecializedTemplate(), Specialization: D);
2007
2008 llvm::PointerUnion<VarTemplateDecl *, VarTemplatePartialSpecializationDecl *>
2009 InstFrom = D->getSpecializedTemplateOrPartial();
2010 if (Decl *InstFromD = InstFrom.dyn_cast<VarTemplateDecl *>()) {
2011 Record.AddDeclRef(D: InstFromD);
2012 } else {
2013 Record.AddDeclRef(D: cast<VarTemplatePartialSpecializationDecl *>(Val&: InstFrom));
2014 Record.AddTemplateArgumentList(TemplateArgs: &D->getTemplateInstantiationArgs());
2015 }
2016
2017 bool ExplicitInstantiation =
2018 D->getTemplateSpecializationKind() ==
2019 TSK_ExplicitInstantiationDeclaration ||
2020 D->getTemplateSpecializationKind() == TSK_ExplicitInstantiationDefinition;
2021 Record.push_back(N: ExplicitInstantiation);
2022 if (ExplicitInstantiation) {
2023 Record.AddSourceLocation(Loc: D->getExternKeywordLoc());
2024 Record.AddSourceLocation(Loc: D->getTemplateKeywordLoc());
2025 }
2026
2027 const ASTTemplateArgumentListInfo *ArgsWritten =
2028 D->getTemplateArgsAsWritten();
2029 Record.push_back(N: !!ArgsWritten);
2030 if (ArgsWritten)
2031 Record.AddASTTemplateArgumentListInfo(ASTTemplArgList: ArgsWritten);
2032
2033 Record.AddTemplateArgumentList(TemplateArgs: &D->getTemplateArgs());
2034 Record.AddSourceLocation(Loc: D->getPointOfInstantiation());
2035 Record.push_back(N: D->getSpecializationKind());
2036 Record.push_back(N: D->IsCompleteDefinition);
2037
2038 VisitVarDecl(D);
2039
2040 Record.push_back(N: D->isCanonicalDecl());
2041
2042 if (D->isCanonicalDecl()) {
2043 // When reading, we'll add it to the folding set of the following template.
2044 Record.AddDeclRef(D: D->getSpecializedTemplate()->getCanonicalDecl());
2045 }
2046
2047 Code = serialization::DECL_VAR_TEMPLATE_SPECIALIZATION;
2048}
2049
2050void ASTDeclWriter::VisitVarTemplatePartialSpecializationDecl(
2051 VarTemplatePartialSpecializationDecl *D) {
2052 Record.AddTemplateParameterList(TemplateParams: D->getTemplateParameters());
2053
2054 VisitVarTemplateSpecializationDecl(D);
2055
2056 // These are read/set from/to the first declaration.
2057 if (D->getPreviousDecl() == nullptr) {
2058 Record.AddDeclRef(D: D->getInstantiatedFromMember());
2059 Record.push_back(N: D->isMemberSpecialization());
2060 }
2061
2062 Code = serialization::DECL_VAR_TEMPLATE_PARTIAL_SPECIALIZATION;
2063}
2064
2065void ASTDeclWriter::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
2066 VisitRedeclarableTemplateDecl(D);
2067
2068 if (D->isFirstDecl())
2069 AddTemplateSpecializations(D);
2070 Code = serialization::DECL_FUNCTION_TEMPLATE;
2071}
2072
2073void ASTDeclWriter::VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D) {
2074 Record.push_back(N: D->hasTypeConstraint());
2075 VisitTypeDecl(D);
2076
2077 Record.push_back(N: D->wasDeclaredWithTypename());
2078
2079 const TypeConstraint *TC = D->getTypeConstraint();
2080 if (D->hasTypeConstraint())
2081 Record.push_back(/*TypeConstraintInitialized=*/N: TC != nullptr);
2082 if (TC) {
2083 auto *CR = TC->getConceptReference();
2084 Record.push_back(N: CR != nullptr);
2085 if (CR)
2086 Record.AddConceptReference(CR);
2087 Record.AddStmt(S: TC->getImmediatelyDeclaredConstraint());
2088 Record.writeUnsignedOrNone(Value: TC->getArgPackSubstIndex());
2089 Record.writeUnsignedOrNone(Value: D->getNumExpansionParameters());
2090 }
2091
2092 bool OwnsDefaultArg = D->hasDefaultArgument() &&
2093 !D->defaultArgumentWasInherited();
2094 Record.push_back(N: OwnsDefaultArg);
2095 if (OwnsDefaultArg)
2096 Record.AddTemplateArgumentLoc(Arg: D->getDefaultArgument());
2097
2098 if (!D->hasTypeConstraint() && !OwnsDefaultArg &&
2099 D->getDeclContext() == D->getLexicalDeclContext() &&
2100 !D->isInvalidDecl() && !D->hasAttrs() &&
2101 !D->isTopLevelDeclInObjCContainer() && !D->isImplicit() &&
2102 D->getDeclName().getNameKind() == DeclarationName::Identifier)
2103 AbbrevToUse = Writer.getDeclTemplateTypeParmAbbrev();
2104
2105 Code = serialization::DECL_TEMPLATE_TYPE_PARM;
2106}
2107
2108void ASTDeclWriter::VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D) {
2109 // For an expanded parameter pack, record the number of expansion types here
2110 // so that it's easier for deserialization to allocate the right amount of
2111 // memory.
2112 Record.push_back(N: D->hasPlaceholderTypeConstraint());
2113 if (D->isExpandedParameterPack())
2114 Record.push_back(N: D->getNumExpansionTypes());
2115
2116 VisitDeclaratorDecl(D);
2117 // TemplateParmPosition.
2118 Record.push_back(N: D->getDepth());
2119 Record.push_back(N: D->getPosition());
2120
2121 if (D->hasPlaceholderTypeConstraint())
2122 Record.AddStmt(S: D->getPlaceholderTypeConstraint());
2123
2124 if (D->isExpandedParameterPack()) {
2125 for (unsigned I = 0, N = D->getNumExpansionTypes(); I != N; ++I) {
2126 Record.AddTypeRef(T: D->getExpansionType(I));
2127 Record.AddTypeSourceInfo(TInfo: D->getExpansionTypeSourceInfo(I));
2128 }
2129
2130 Code = serialization::DECL_EXPANDED_NON_TYPE_TEMPLATE_PARM_PACK;
2131 } else {
2132 // Rest of NonTypeTemplateParmDecl.
2133 Record.push_back(N: D->isParameterPack());
2134 bool OwnsDefaultArg = D->hasDefaultArgument() &&
2135 !D->defaultArgumentWasInherited();
2136 Record.push_back(N: OwnsDefaultArg);
2137 if (OwnsDefaultArg)
2138 Record.AddTemplateArgumentLoc(Arg: D->getDefaultArgument());
2139 Code = serialization::DECL_NON_TYPE_TEMPLATE_PARM;
2140 }
2141}
2142
2143void ASTDeclWriter::VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D) {
2144 // For an expanded parameter pack, record the number of expansion types here
2145 // so that it's easier for deserialization to allocate the right amount of
2146 // memory.
2147 if (D->isExpandedParameterPack())
2148 Record.push_back(N: D->getNumExpansionTemplateParameters());
2149
2150 VisitTemplateDecl(D);
2151 Record.push_back(N: D->wasDeclaredWithTypename());
2152 // TemplateParmPosition.
2153 Record.push_back(N: D->getDepth());
2154 Record.push_back(N: D->getPosition());
2155
2156 if (D->isExpandedParameterPack()) {
2157 for (unsigned I = 0, N = D->getNumExpansionTemplateParameters();
2158 I != N; ++I)
2159 Record.AddTemplateParameterList(TemplateParams: D->getExpansionTemplateParameters(I));
2160 Code = serialization::DECL_EXPANDED_TEMPLATE_TEMPLATE_PARM_PACK;
2161 } else {
2162 // Rest of TemplateTemplateParmDecl.
2163 Record.push_back(N: D->isParameterPack());
2164 bool OwnsDefaultArg = D->hasDefaultArgument() &&
2165 !D->defaultArgumentWasInherited();
2166 Record.push_back(N: OwnsDefaultArg);
2167 if (OwnsDefaultArg)
2168 Record.AddTemplateArgumentLoc(Arg: D->getDefaultArgument());
2169 Code = serialization::DECL_TEMPLATE_TEMPLATE_PARM;
2170 }
2171}
2172
2173void ASTDeclWriter::VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D) {
2174 VisitRedeclarableTemplateDecl(D);
2175 Code = serialization::DECL_TYPE_ALIAS_TEMPLATE;
2176}
2177
2178void ASTDeclWriter::VisitStaticAssertDecl(StaticAssertDecl *D) {
2179 VisitDecl(D);
2180 Record.AddStmt(S: D->getAssertExpr());
2181 Record.push_back(N: D->isFailed());
2182 Record.AddStmt(S: D->getMessage());
2183 Record.AddSourceLocation(Loc: D->getRParenLoc());
2184 Code = serialization::DECL_STATIC_ASSERT;
2185}
2186
2187/// Emit the DeclContext part of a declaration context decl.
2188void ASTDeclWriter::VisitDeclContext(DeclContext *DC) {
2189 static_assert(DeclContext::NumDeclContextBits == 13,
2190 "You need to update the serializer after you change the "
2191 "DeclContextBits");
2192 LookupBlockOffsets Offsets;
2193
2194 if (Writer.isGeneratingReducedBMI() && isa<NamespaceDecl>(Val: DC) &&
2195 cast<NamespaceDecl>(Val: DC)->isFromExplicitGlobalModule()) {
2196 // In reduced BMI, delay writing lexical and visible block for namespace
2197 // in the global module fragment. See the comments of DelayedNamespace for
2198 // details.
2199 Writer.DelayedNamespace.push_back(Elt: cast<NamespaceDecl>(Val: DC));
2200 } else {
2201 Offsets.LexicalOffset =
2202 Writer.WriteDeclContextLexicalBlock(Context&: Record.getASTContext(), DC);
2203 Writer.WriteDeclContextVisibleBlock(Context&: Record.getASTContext(), DC, Offsets);
2204 }
2205
2206 Record.AddLookupOffsets(Offsets);
2207}
2208
2209const Decl *ASTWriter::getFirstLocalDecl(const Decl *D) {
2210 assert(IsLocalDecl(D) && "expected a local declaration");
2211
2212 const Decl *Canon = D->getCanonicalDecl();
2213 if (IsLocalDecl(D: Canon))
2214 return Canon;
2215
2216 const Decl *&CacheEntry = FirstLocalDeclCache[Canon];
2217 if (CacheEntry)
2218 return CacheEntry;
2219
2220 for (const Decl *Redecl = D; Redecl; Redecl = Redecl->getPreviousDecl())
2221 if (IsLocalDecl(D: Redecl))
2222 D = Redecl;
2223 return CacheEntry = D;
2224}
2225
2226template <typename T>
2227void ASTDeclWriter::VisitRedeclarable(Redeclarable<T> *D) {
2228 T *First = D->getFirstDecl();
2229 T *MostRecent = First->getMostRecentDecl();
2230 T *DAsT = static_cast<T *>(D);
2231 if (MostRecent != First) {
2232 assert(isRedeclarableDeclKind(DAsT->getKind()) &&
2233 "Not considered redeclarable?");
2234
2235 Record.AddDeclRef(D: First);
2236
2237 // Write out a list of local redeclarations of this declaration if it's the
2238 // first local declaration in the chain.
2239 const Decl *FirstLocal = Writer.getFirstLocalDecl(D: DAsT);
2240 if (DAsT == FirstLocal) {
2241 // Emit a list of all imported first declarations so that we can be sure
2242 // that all redeclarations visible to this module are before D in the
2243 // redecl chain.
2244 unsigned I = Record.size();
2245 Record.push_back(N: 0);
2246 if (Writer.Chain)
2247 AddFirstDeclFromEachModule(D: DAsT, /*IncludeLocal*/false);
2248 // This is the number of imported first declarations + 1.
2249 Record[I] = Record.size() - I;
2250
2251 // Collect the set of local redeclarations of this declaration, from
2252 // newest to oldest.
2253 ASTWriter::RecordData LocalRedecls;
2254 ASTRecordWriter LocalRedeclWriter(Record, LocalRedecls);
2255 for (const Decl *Prev = FirstLocal->getMostRecentDecl();
2256 Prev != FirstLocal; Prev = Prev->getPreviousDecl())
2257 if (!Prev->isFromASTFile())
2258 LocalRedeclWriter.AddDeclRef(D: Prev);
2259
2260 // If we have any redecls, write them now as a separate record preceding
2261 // the declaration itself.
2262 if (LocalRedecls.empty())
2263 Record.push_back(N: 0);
2264 else
2265 Record.AddOffset(BitOffset: LocalRedeclWriter.Emit(Code: LOCAL_REDECLARATIONS));
2266 } else {
2267 Record.push_back(N: 0);
2268 Record.AddDeclRef(D: FirstLocal);
2269 }
2270
2271 // Make sure that we serialize both the previous and the most-recent
2272 // declarations, which (transitively) ensures that all declarations in the
2273 // chain get serialized.
2274 //
2275 // FIXME: This is not correct; when we reach an imported declaration we
2276 // won't emit its previous declaration.
2277 (void)Writer.GetDeclRef(D: D->getPreviousDecl());
2278 (void)Writer.GetDeclRef(D: MostRecent);
2279 } else {
2280 // We use the sentinel value 0 to indicate an only declaration.
2281 Record.push_back(N: 0);
2282 }
2283}
2284
2285void ASTDeclWriter::VisitHLSLBufferDecl(HLSLBufferDecl *D) {
2286 VisitNamedDecl(D);
2287 VisitDeclContext(DC: D);
2288 Record.push_back(N: D->isCBuffer());
2289 Record.AddSourceLocation(Loc: D->getLocStart());
2290 Record.AddSourceLocation(Loc: D->getLBraceLoc());
2291 Record.AddSourceLocation(Loc: D->getRBraceLoc());
2292
2293 Code = serialization::DECL_HLSL_BUFFER;
2294}
2295
2296void ASTDeclWriter::VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D) {
2297 Record.writeOMPChildren(Data: D->Data);
2298 VisitDecl(D);
2299 Code = serialization::DECL_OMP_THREADPRIVATE;
2300}
2301
2302void ASTDeclWriter::VisitOMPAllocateDecl(OMPAllocateDecl *D) {
2303 Record.writeOMPChildren(Data: D->Data);
2304 VisitDecl(D);
2305 Code = serialization::DECL_OMP_ALLOCATE;
2306}
2307
2308void ASTDeclWriter::VisitOMPRequiresDecl(OMPRequiresDecl *D) {
2309 Record.writeOMPChildren(Data: D->Data);
2310 VisitDecl(D);
2311 Code = serialization::DECL_OMP_REQUIRES;
2312}
2313
2314void ASTDeclWriter::VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D) {
2315 static_assert(DeclContext::NumOMPDeclareReductionDeclBits == 15,
2316 "You need to update the serializer after you change the "
2317 "NumOMPDeclareReductionDeclBits");
2318
2319 VisitValueDecl(D);
2320 Record.AddSourceLocation(Loc: D->getBeginLoc());
2321 Record.AddStmt(S: D->getCombinerIn());
2322 Record.AddStmt(S: D->getCombinerOut());
2323 Record.AddStmt(S: D->getCombiner());
2324 Record.AddStmt(S: D->getInitOrig());
2325 Record.AddStmt(S: D->getInitPriv());
2326 Record.AddStmt(S: D->getInitializer());
2327 Record.push_back(N: llvm::to_underlying(E: D->getInitializerKind()));
2328 Record.AddDeclRef(D: D->getPrevDeclInScope());
2329 Code = serialization::DECL_OMP_DECLARE_REDUCTION;
2330}
2331
2332void ASTDeclWriter::VisitOMPDeclareMapperDecl(OMPDeclareMapperDecl *D) {
2333 Record.writeOMPChildren(Data: D->Data);
2334 VisitValueDecl(D);
2335 Record.AddDeclarationName(Name: D->getVarName());
2336 Record.AddDeclRef(D: D->getPrevDeclInScope());
2337 Code = serialization::DECL_OMP_DECLARE_MAPPER;
2338}
2339
2340void ASTDeclWriter::VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D) {
2341 VisitVarDecl(D);
2342 Code = serialization::DECL_OMP_CAPTUREDEXPR;
2343}
2344
2345void ASTDeclWriter::VisitOpenACCDeclareDecl(OpenACCDeclareDecl *D) {
2346 Record.writeUInt32(Value: D->clauses().size());
2347 VisitDecl(D);
2348 Record.writeEnum(value: D->DirKind);
2349 Record.AddSourceLocation(Loc: D->DirectiveLoc);
2350 Record.AddSourceLocation(Loc: D->EndLoc);
2351 Record.writeOpenACCClauseList(Clauses: D->clauses());
2352 Code = serialization::DECL_OPENACC_DECLARE;
2353}
2354void ASTDeclWriter::VisitOpenACCRoutineDecl(OpenACCRoutineDecl *D) {
2355 Record.writeUInt32(Value: D->clauses().size());
2356 VisitDecl(D);
2357 Record.writeEnum(value: D->DirKind);
2358 Record.AddSourceLocation(Loc: D->DirectiveLoc);
2359 Record.AddSourceLocation(Loc: D->EndLoc);
2360 Record.AddSourceRange(Range: D->ParensLoc);
2361 Record.AddStmt(S: D->FuncRef);
2362 Record.writeOpenACCClauseList(Clauses: D->clauses());
2363 Code = serialization::DECL_OPENACC_ROUTINE;
2364}
2365
2366//===----------------------------------------------------------------------===//
2367// ASTWriter Implementation
2368//===----------------------------------------------------------------------===//
2369
2370namespace {
2371template <FunctionDecl::TemplatedKind Kind>
2372std::shared_ptr<llvm::BitCodeAbbrev>
2373getFunctionDeclAbbrev(serialization::DeclCode Code) {
2374 using namespace llvm;
2375
2376 auto Abv = std::make_shared<BitCodeAbbrev>();
2377 Abv->Add(OpInfo: BitCodeAbbrevOp(Code));
2378 // RedeclarableDecl
2379 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // CanonicalDecl
2380 Abv->Add(OpInfo: BitCodeAbbrevOp(Kind));
2381 if constexpr (Kind == FunctionDecl::TK_NonTemplate) {
2382
2383 } else if constexpr (Kind == FunctionDecl::TK_FunctionTemplate) {
2384 // DescribedFunctionTemplate
2385 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
2386 } else if constexpr (Kind == FunctionDecl::TK_DependentNonTemplate) {
2387 // Instantiated From Decl
2388 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
2389 } else if constexpr (Kind == FunctionDecl::TK_MemberSpecialization) {
2390 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // InstantiatedFrom
2391 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
2392 3)); // TemplateSpecializationKind
2393 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Specialized Location
2394 } else if constexpr (Kind ==
2395 FunctionDecl::TK_FunctionTemplateSpecialization) {
2396 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Template
2397 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
2398 3)); // TemplateSpecializationKind
2399 Abv->Add(OpInfo: BitCodeAbbrevOp(1)); // Template Argument Size
2400 Abv->Add(OpInfo: BitCodeAbbrevOp(TemplateArgument::Type)); // Template Argument Kind
2401 Abv->Add(
2402 OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Template Argument Type
2403 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Is Defaulted
2404 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // TemplateArgumentsAsWritten
2405 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SourceLocation
2406 Abv->Add(OpInfo: BitCodeAbbrevOp(0));
2407 Abv->Add(
2408 OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Canonical Decl of template
2409 } else if constexpr (Kind == FunctionDecl::
2410 TK_DependentFunctionTemplateSpecialization) {
2411 // Candidates of specialization
2412 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
2413 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // TemplateArgumentsAsWritten
2414 } else {
2415 llvm_unreachable("Unknown templated kind?");
2416 }
2417 // Decl
2418 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
2419 8)); // Packed DeclBits: ModuleOwnershipKind,
2420 // isUsed, isReferenced, AccessSpecifier,
2421 // isImplicit
2422 //
2423 // The following bits should be 0:
2424 // HasStandaloneLexicalDC, HasAttrs,
2425 // TopLevelDeclInObjCContainer,
2426 // isInvalidDecl
2427 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
2428 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
2429 // NamedDecl
2430 Abv->Add(OpInfo: BitCodeAbbrevOp(DeclarationName::Identifier)); // NameKind
2431 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Identifier
2432 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // AnonDeclNumber
2433 // ValueDecl
2434 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
2435 // DeclaratorDecl
2436 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // InnerLocStart
2437 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // HasExtInfo
2438 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TSIType
2439 // FunctionDecl
2440 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 11)); // IDNS
2441 Abv->Add(OpInfo: BitCodeAbbrevOp(
2442 BitCodeAbbrevOp::Fixed,
2443 28)); // Packed Function Bits: StorageClass, Inline, InlineSpecified,
2444 // VirtualAsWritten, Pure, HasInheritedProto, HasWrittenProto,
2445 // Deleted, Trivial, TrivialForCall, Defaulted, ExplicitlyDefaulted,
2446 // IsIneligibleOrNotSelected, ImplicitReturnZero, Constexpr,
2447 // UsesSEHTry, SkippedBody, MultiVersion, LateParsed,
2448 // FriendConstraintRefersToEnclosingTemplate, Linkage,
2449 // ShouldSkipCheckingODR
2450 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LocEnd
2451 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // ODRHash
2452 // This Array slurps the rest of the record. Fortunately we want to encode
2453 // (nearly) all the remaining (variable number of) fields in the same way.
2454 //
2455 // This is:
2456 // NumParams and Params[] from FunctionDecl, and
2457 // NumOverriddenMethods, OverriddenMethods[] from CXXMethodDecl.
2458 //
2459 // Add an AbbrevOp for 'size then elements' and use it here.
2460 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
2461 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
2462 return Abv;
2463}
2464
2465template <FunctionDecl::TemplatedKind Kind>
2466std::shared_ptr<llvm::BitCodeAbbrev> getCXXMethodAbbrev() {
2467 return getFunctionDeclAbbrev<Kind>(serialization::DECL_CXX_METHOD);
2468}
2469} // namespace
2470
2471void ASTWriter::WriteDeclAbbrevs() {
2472 using namespace llvm;
2473
2474 std::shared_ptr<BitCodeAbbrev> Abv;
2475
2476 // Abbreviation for DECL_FIELD
2477 Abv = std::make_shared<BitCodeAbbrev>();
2478 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::DECL_FIELD));
2479 // Decl
2480 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
2481 7)); // Packed DeclBits: ModuleOwnershipKind,
2482 // isUsed, isReferenced, AccessSpecifier,
2483 //
2484 // The following bits should be 0:
2485 // isImplicit, HasStandaloneLexicalDC, HasAttrs,
2486 // TopLevelDeclInObjCContainer,
2487 // isInvalidDecl
2488 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
2489 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
2490 // NamedDecl
2491 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // NameKind = Identifier
2492 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
2493 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // AnonDeclNumber
2494 // ValueDecl
2495 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
2496 // DeclaratorDecl
2497 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // InnerStartLoc
2498 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // hasExtInfo
2499 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TSIType
2500 // FieldDecl
2501 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isMutable
2502 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // StorageKind
2503 // Type Source Info
2504 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
2505 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TypeLoc
2506 DeclFieldAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2507
2508 // Abbreviation for DECL_OBJC_IVAR
2509 Abv = std::make_shared<BitCodeAbbrev>();
2510 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::DECL_OBJC_IVAR));
2511 // Decl
2512 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
2513 12)); // Packed DeclBits: HasStandaloneLexicalDC,
2514 // isInvalidDecl, HasAttrs, isImplicit, isUsed,
2515 // isReferenced, TopLevelDeclInObjCContainer,
2516 // AccessSpecifier, ModuleOwnershipKind
2517 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
2518 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
2519 // NamedDecl
2520 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // NameKind = Identifier
2521 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
2522 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // AnonDeclNumber
2523 // ValueDecl
2524 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
2525 // DeclaratorDecl
2526 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // InnerStartLoc
2527 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // hasExtInfo
2528 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TSIType
2529 // FieldDecl
2530 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isMutable
2531 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // InitStyle
2532 // ObjC Ivar
2533 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // getAccessControl
2534 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // getSynthesize
2535 // Type Source Info
2536 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
2537 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TypeLoc
2538 DeclObjCIvarAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2539
2540 // Abbreviation for DECL_ENUM
2541 Abv = std::make_shared<BitCodeAbbrev>();
2542 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::DECL_ENUM));
2543 // Redeclarable
2544 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // No redeclaration
2545 // Decl
2546 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
2547 7)); // Packed DeclBits: ModuleOwnershipKind,
2548 // isUsed, isReferenced, AccessSpecifier,
2549 //
2550 // The following bits should be 0:
2551 // isImplicit, HasStandaloneLexicalDC, HasAttrs,
2552 // TopLevelDeclInObjCContainer,
2553 // isInvalidDecl
2554 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
2555 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
2556 // NamedDecl
2557 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // NameKind = Identifier
2558 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
2559 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // AnonDeclNumber
2560 // TypeDecl
2561 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Source Location
2562 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type Ref
2563 // TagDecl
2564 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // IdentifierNamespace
2565 Abv->Add(OpInfo: BitCodeAbbrevOp(
2566 BitCodeAbbrevOp::Fixed,
2567 9)); // Packed Tag Decl Bits: getTagKind, isCompleteDefinition,
2568 // EmbeddedInDeclarator, IsFreeStanding,
2569 // isCompleteDefinitionRequired, ExtInfoKind
2570 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SourceLocation
2571 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SourceLocation
2572 // EnumDecl
2573 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // AddTypeRef
2574 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // IntegerType
2575 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // getPromotionType
2576 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 20)); // Enum Decl Bits
2577 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));// ODRHash
2578 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // InstantiatedMembEnum
2579 // DC
2580 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LexicalOffset
2581 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // VisibleOffset
2582 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // ModuleLocalOffset
2583 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TULocalOffset
2584 DeclEnumAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2585
2586 // Abbreviation for DECL_RECORD
2587 Abv = std::make_shared<BitCodeAbbrev>();
2588 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::DECL_RECORD));
2589 // Redeclarable
2590 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // No redeclaration
2591 // Decl
2592 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
2593 7)); // Packed DeclBits: ModuleOwnershipKind,
2594 // isUsed, isReferenced, AccessSpecifier,
2595 //
2596 // The following bits should be 0:
2597 // isImplicit, HasStandaloneLexicalDC, HasAttrs,
2598 // TopLevelDeclInObjCContainer,
2599 // isInvalidDecl
2600 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
2601 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
2602 // NamedDecl
2603 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // NameKind = Identifier
2604 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
2605 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // AnonDeclNumber
2606 // TypeDecl
2607 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Source Location
2608 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type Ref
2609 // TagDecl
2610 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // IdentifierNamespace
2611 Abv->Add(OpInfo: BitCodeAbbrevOp(
2612 BitCodeAbbrevOp::Fixed,
2613 9)); // Packed Tag Decl Bits: getTagKind, isCompleteDefinition,
2614 // EmbeddedInDeclarator, IsFreeStanding,
2615 // isCompleteDefinitionRequired, ExtInfoKind
2616 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SourceLocation
2617 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SourceLocation
2618 // RecordDecl
2619 Abv->Add(OpInfo: BitCodeAbbrevOp(
2620 BitCodeAbbrevOp::Fixed,
2621 14)); // Packed Record Decl Bits: FlexibleArrayMember,
2622 // AnonymousStructUnion, hasObjectMember, hasVolatileMember,
2623 // isNonTrivialToPrimitiveDefaultInitialize,
2624 // isNonTrivialToPrimitiveCopy, isNonTrivialToPrimitiveDestroy,
2625 // hasNonTrivialToPrimitiveDefaultInitializeCUnion,
2626 // hasNonTrivialToPrimitiveDestructCUnion,
2627 // hasNonTrivialToPrimitiveCopyCUnion,
2628 // hasUninitializedExplicitInitFields, isParamDestroyedInCallee,
2629 // getArgPassingRestrictions
2630 // ODRHash
2631 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 26));
2632
2633 // DC
2634 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LexicalOffset
2635 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // VisibleOffset
2636 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // ModuleLocalOffset
2637 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TULocalOffset
2638 DeclRecordAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2639
2640 // Abbreviation for DECL_PARM_VAR
2641 Abv = std::make_shared<BitCodeAbbrev>();
2642 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::DECL_PARM_VAR));
2643 // Redeclarable
2644 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // No redeclaration
2645 // Decl
2646 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
2647 8)); // Packed DeclBits: ModuleOwnershipKind, isUsed,
2648 // isReferenced, AccessSpecifier,
2649 // HasStandaloneLexicalDC, HasAttrs, isImplicit,
2650 // TopLevelDeclInObjCContainer,
2651 // isInvalidDecl,
2652 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
2653 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
2654 // NamedDecl
2655 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // NameKind = Identifier
2656 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
2657 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // AnonDeclNumber
2658 // ValueDecl
2659 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
2660 // DeclaratorDecl
2661 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // InnerStartLoc
2662 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // hasExtInfo
2663 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TSIType
2664 // VarDecl
2665 Abv->Add(
2666 OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
2667 12)); // Packed Var Decl bits: SClass, TSCSpec, InitStyle,
2668 // isARCPseudoStrong, Linkage, ModulesCodegen
2669 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // VarKind (local enum)
2670 // ParmVarDecl
2671 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // ScopeIndex
2672 Abv->Add(OpInfo: BitCodeAbbrevOp(
2673 BitCodeAbbrevOp::Fixed,
2674 19)); // Packed Parm Var Decl bits: IsObjCMethodParameter, ScopeDepth,
2675 // ObjCDeclQualifier, KNRPromoted,
2676 // HasInheritedDefaultArg, HasUninstantiatedDefaultArg
2677 // Type Source Info
2678 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
2679 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TypeLoc
2680 DeclParmVarAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2681
2682 // Abbreviation for DECL_TYPEDEF
2683 Abv = std::make_shared<BitCodeAbbrev>();
2684 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::DECL_TYPEDEF));
2685 // Redeclarable
2686 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // No redeclaration
2687 // Decl
2688 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
2689 7)); // Packed DeclBits: ModuleOwnershipKind,
2690 // isReferenced, isUsed, AccessSpecifier. Other
2691 // higher bits should be 0: isImplicit,
2692 // HasStandaloneLexicalDC, HasAttrs,
2693 // TopLevelDeclInObjCContainer, isInvalidDecl
2694 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
2695 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
2696 // NamedDecl
2697 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // NameKind = Identifier
2698 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
2699 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // AnonDeclNumber
2700 // TypeDecl
2701 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Source Location
2702 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type Ref
2703 // TypedefDecl
2704 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
2705 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TypeLoc
2706 DeclTypedefAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2707
2708 // Abbreviation for DECL_VAR
2709 Abv = std::make_shared<BitCodeAbbrev>();
2710 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::DECL_VAR));
2711 // Redeclarable
2712 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // No redeclaration
2713 // Decl
2714 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
2715 12)); // Packed DeclBits: HasStandaloneLexicalDC,
2716 // isInvalidDecl, HasAttrs, isImplicit, isUsed,
2717 // isReferenced, TopLevelDeclInObjCContainer,
2718 // AccessSpecifier, ModuleOwnershipKind
2719 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
2720 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
2721 // NamedDecl
2722 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // NameKind = Identifier
2723 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
2724 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // AnonDeclNumber
2725 // ValueDecl
2726 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
2727 // DeclaratorDecl
2728 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // InnerStartLoc
2729 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // hasExtInfo
2730 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TSIType
2731 // VarDecl
2732 Abv->Add(OpInfo: BitCodeAbbrevOp(
2733 BitCodeAbbrevOp::Fixed,
2734 22)); // Packed Var Decl bits: Linkage, ModulesCodegen,
2735 // SClass, TSCSpec, InitStyle,
2736 // isARCPseudoStrong, IsThisDeclarationADemotedDefinition,
2737 // isExceptionVariable, isNRVOVariable, isCXXForRangeDecl,
2738 // isInline, isInlineSpecified, isConstexpr,
2739 // isInitCapture, isPrevDeclInSameScope, hasInitWithSideEffects,
2740 // EscapingByref, HasDeducedType, ImplicitParamKind, isObjCForDecl
2741 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // VarKind (local enum)
2742 // Type Source Info
2743 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
2744 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TypeLoc
2745 DeclVarAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2746
2747 // Abbreviation for DECL_CXX_METHOD
2748 DeclCXXMethodAbbrev =
2749 Stream.EmitAbbrev(Abbv: getCXXMethodAbbrev<FunctionDecl::TK_NonTemplate>());
2750 DeclTemplateCXXMethodAbbrev = Stream.EmitAbbrev(
2751 Abbv: getCXXMethodAbbrev<FunctionDecl::TK_FunctionTemplate>());
2752 DeclDependentNonTemplateCXXMethodAbbrev = Stream.EmitAbbrev(
2753 Abbv: getCXXMethodAbbrev<FunctionDecl::TK_DependentNonTemplate>());
2754 DeclMemberSpecializedCXXMethodAbbrev = Stream.EmitAbbrev(
2755 Abbv: getCXXMethodAbbrev<FunctionDecl::TK_MemberSpecialization>());
2756 DeclTemplateSpecializedCXXMethodAbbrev = Stream.EmitAbbrev(
2757 Abbv: getCXXMethodAbbrev<FunctionDecl::TK_FunctionTemplateSpecialization>());
2758 DeclDependentSpecializationCXXMethodAbbrev = Stream.EmitAbbrev(
2759 Abbv: getCXXMethodAbbrev<
2760 FunctionDecl::TK_DependentFunctionTemplateSpecialization>());
2761
2762 // Abbreviation for DECL_TEMPLATE_TYPE_PARM
2763 Abv = std::make_shared<BitCodeAbbrev>();
2764 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::DECL_TEMPLATE_TYPE_PARM));
2765 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // hasTypeConstraint
2766 // Decl
2767 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
2768 7)); // Packed DeclBits: ModuleOwnershipKind,
2769 // isReferenced, isUsed, AccessSpecifier. Other
2770 // higher bits should be 0: isImplicit,
2771 // HasStandaloneLexicalDC, HasAttrs,
2772 // TopLevelDeclInObjCContainer, isInvalidDecl
2773 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
2774 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
2775 // NamedDecl
2776 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // NameKind = Identifier
2777 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
2778 Abv->Add(OpInfo: BitCodeAbbrevOp(0));
2779 // TypeDecl
2780 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Source Location
2781 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type Ref
2782 // TemplateTypeParmDecl
2783 Abv->Add(
2784 OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // wasDeclaredWithTypename
2785 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // OwnsDefaultArg
2786 DeclTemplateTypeParmAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2787
2788 // Abbreviation for DECL_USING_SHADOW
2789 Abv = std::make_shared<BitCodeAbbrev>();
2790 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::DECL_USING_SHADOW));
2791 // Redeclarable
2792 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // No redeclaration
2793 // Decl
2794 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
2795 12)); // Packed DeclBits: HasStandaloneLexicalDC,
2796 // isInvalidDecl, HasAttrs, isImplicit, isUsed,
2797 // isReferenced, TopLevelDeclInObjCContainer,
2798 // AccessSpecifier, ModuleOwnershipKind
2799 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
2800 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
2801 // NamedDecl
2802 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // NameKind = Identifier
2803 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
2804 Abv->Add(OpInfo: BitCodeAbbrevOp(0));
2805 // UsingShadowDecl
2806 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TargetDecl
2807 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 11)); // IDNS
2808 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // UsingOrNextShadow
2809 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR,
2810 6)); // InstantiatedFromUsingShadowDecl
2811 DeclUsingShadowAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2812
2813 // Abbreviation for EXPR_DECL_REF
2814 Abv = std::make_shared<BitCodeAbbrev>();
2815 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::EXPR_DECL_REF));
2816 // Stmt
2817 // Expr
2818 // PackingBits: DependenceKind, ValueKind. ObjectKind should be 0.
2819 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7));
2820 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
2821 // DeclRefExpr
2822 // Packing Bits: , HadMultipleCandidates, RefersToEnclosingVariableOrCapture,
2823 // IsImmediateEscalating, NonOdrUseReason.
2824 // GetDeclFound, HasQualifier and ExplicitTemplateArgs should be 0.
2825 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 5));
2826 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclRef
2827 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Location
2828 DeclRefExprAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2829
2830 // Abbreviation for EXPR_INTEGER_LITERAL
2831 Abv = std::make_shared<BitCodeAbbrev>();
2832 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::EXPR_INTEGER_LITERAL));
2833 //Stmt
2834 // Expr
2835 // DependenceKind, ValueKind, ObjectKind
2836 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 10));
2837 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
2838 // Integer Literal
2839 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Location
2840 Abv->Add(OpInfo: BitCodeAbbrevOp(32)); // Bit Width
2841 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Value
2842 IntegerLiteralAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2843
2844 // Abbreviation for EXPR_CHARACTER_LITERAL
2845 Abv = std::make_shared<BitCodeAbbrev>();
2846 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::EXPR_CHARACTER_LITERAL));
2847 //Stmt
2848 // Expr
2849 // DependenceKind, ValueKind, ObjectKind
2850 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 10));
2851 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
2852 // Character Literal
2853 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // getValue
2854 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Location
2855 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3)); // getKind
2856 CharacterLiteralAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2857
2858 // Abbreviation for EXPR_IMPLICIT_CAST
2859 Abv = std::make_shared<BitCodeAbbrev>();
2860 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::EXPR_IMPLICIT_CAST));
2861 // Stmt
2862 // Expr
2863 // Packing Bits: DependenceKind, ValueKind, ObjectKind,
2864 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 10));
2865 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
2866 // CastExpr
2867 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // PathSize
2868 // Packing Bits: CastKind, StoredFPFeatures, isPartOfExplicitCast
2869 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 9));
2870 // ImplicitCastExpr
2871 ExprImplicitCastAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2872
2873 // Abbreviation for EXPR_BINARY_OPERATOR
2874 Abv = std::make_shared<BitCodeAbbrev>();
2875 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::EXPR_BINARY_OPERATOR));
2876 // Stmt
2877 // Expr
2878 // Packing Bits: DependenceKind. ValueKind and ObjectKind should
2879 // be 0 in this case.
2880 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 5));
2881 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
2882 // BinaryOperator
2883 Abv->Add(
2884 OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // OpCode and HasFPFeatures
2885 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Source Location
2886 BinaryOperatorAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2887
2888 // Abbreviation for EXPR_COMPOUND_ASSIGN_OPERATOR
2889 Abv = std::make_shared<BitCodeAbbrev>();
2890 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::EXPR_COMPOUND_ASSIGN_OPERATOR));
2891 // Stmt
2892 // Expr
2893 // Packing Bits: DependenceKind. ValueKind and ObjectKind should
2894 // be 0 in this case.
2895 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 5));
2896 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
2897 // BinaryOperator
2898 // Packing Bits: OpCode. The HasFPFeatures bit should be 0
2899 Abv->Add(
2900 OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // OpCode and HasFPFeatures
2901 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Source Location
2902 // CompoundAssignOperator
2903 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LHSType
2904 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Result Type
2905 CompoundAssignOperatorAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2906
2907 // Abbreviation for EXPR_CALL
2908 Abv = std::make_shared<BitCodeAbbrev>();
2909 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::EXPR_CALL));
2910 // Stmt
2911 // Expr
2912 // Packing Bits: DependenceKind, ValueKind, ObjectKind,
2913 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 10));
2914 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
2915 // CallExpr
2916 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // NumArgs
2917 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // ADLCallKind
2918 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Source Location
2919 CallExprAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2920
2921 // Abbreviation for EXPR_CXX_OPERATOR_CALL
2922 Abv = std::make_shared<BitCodeAbbrev>();
2923 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::EXPR_CXX_OPERATOR_CALL));
2924 // Stmt
2925 // Expr
2926 // Packing Bits: DependenceKind, ValueKind, ObjectKind,
2927 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 10));
2928 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
2929 // CallExpr
2930 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // NumArgs
2931 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // ADLCallKind
2932 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Source Location
2933 // CXXOperatorCallExpr
2934 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Operator Kind
2935 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Source Location
2936 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Source Location
2937 CXXOperatorCallExprAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2938
2939 // Abbreviation for EXPR_CXX_MEMBER_CALL
2940 Abv = std::make_shared<BitCodeAbbrev>();
2941 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::EXPR_CXX_MEMBER_CALL));
2942 // Stmt
2943 // Expr
2944 // Packing Bits: DependenceKind, ValueKind, ObjectKind,
2945 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 10));
2946 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
2947 // CallExpr
2948 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // NumArgs
2949 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // ADLCallKind
2950 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Source Location
2951 // CXXMemberCallExpr
2952 CXXMemberCallExprAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2953
2954 // Abbreviation for STMT_COMPOUND
2955 Abv = std::make_shared<BitCodeAbbrev>();
2956 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::STMT_COMPOUND));
2957 // Stmt
2958 // CompoundStmt
2959 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Num Stmts
2960 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // hasStoredFPFeatures
2961 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Source Location
2962 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Source Location
2963 CompoundStmtAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2964
2965 Abv = std::make_shared<BitCodeAbbrev>();
2966 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::DECL_CONTEXT_LEXICAL));
2967 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
2968 DeclContextLexicalAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2969
2970 Abv = std::make_shared<BitCodeAbbrev>();
2971 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::DECL_CONTEXT_VISIBLE));
2972 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
2973 DeclContextVisibleLookupAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2974
2975 Abv = std::make_shared<BitCodeAbbrev>();
2976 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::DECL_CONTEXT_MODULE_LOCAL_VISIBLE));
2977 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
2978 DeclModuleLocalVisibleLookupAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2979
2980 Abv = std::make_shared<BitCodeAbbrev>();
2981 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::DECL_CONTEXT_TU_LOCAL_VISIBLE));
2982 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
2983 DeclTULocalLookupAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2984
2985 Abv = std::make_shared<BitCodeAbbrev>();
2986 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::DECL_SPECIALIZATIONS));
2987 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
2988 DeclSpecializationsAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2989
2990 Abv = std::make_shared<BitCodeAbbrev>();
2991 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::DECL_PARTIAL_SPECIALIZATIONS));
2992 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
2993 DeclPartialSpecializationsAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2994}
2995
2996/// isRequiredDecl - Check if this is a "required" Decl, which must be seen by
2997/// consumers of the AST.
2998///
2999/// Such decls will always be deserialized from the AST file, so we would like
3000/// this to be as restrictive as possible. Currently the predicate is driven by
3001/// code generation requirements, if other clients have a different notion of
3002/// what is "required" then we may have to consider an alternate scheme where
3003/// clients can iterate over the top-level decls and get information on them,
3004/// without necessary deserializing them. We could explicitly require such
3005/// clients to use a separate API call to "realize" the decl. This should be
3006/// relatively painless since they would presumably only do it for top-level
3007/// decls.
3008static bool isRequiredDecl(const Decl *D, ASTContext &Context,
3009 Module *WritingModule) {
3010 // Named modules have different semantics than header modules. Every named
3011 // module units owns a translation unit. So the importer of named modules
3012 // doesn't need to deserilize everything ahead of time.
3013 if (WritingModule && WritingModule->isNamedModule()) {
3014 // The PragmaCommentDecl and PragmaDetectMismatchDecl are MSVC's extension.
3015 // And the behavior of MSVC for such cases will leak this to the module
3016 // users. Given pragma is not a standard thing, the compiler has the space
3017 // to do their own decision. Let's follow MSVC here.
3018 if (isa<PragmaCommentDecl, PragmaDetectMismatchDecl>(Val: D))
3019 return true;
3020 return false;
3021 }
3022
3023 // An ObjCMethodDecl is never considered as "required" because its
3024 // implementation container always is.
3025
3026 // File scoped assembly or obj-c or OMP declare target implementation must be
3027 // seen.
3028 if (isa<FileScopeAsmDecl, TopLevelStmtDecl, ObjCImplDecl>(Val: D))
3029 return true;
3030
3031 if (WritingModule && isPartOfPerModuleInitializer(D)) {
3032 // These declarations are part of the module initializer, and are emitted
3033 // if and when the module is imported, rather than being emitted eagerly.
3034 return false;
3035 }
3036
3037 return Context.DeclMustBeEmitted(D);
3038}
3039
3040void ASTWriter::WriteDecl(ASTContext &Context, Decl *D) {
3041 PrettyDeclStackTraceEntry CrashInfo(Context, D, SourceLocation(),
3042 "serializing");
3043
3044 // Determine the ID for this declaration.
3045 LocalDeclID ID;
3046 assert(!D->isFromASTFile() && "should not be emitting imported decl");
3047 LocalDeclID &IDR = DeclIDs[D];
3048 if (IDR.isInvalid())
3049 IDR = NextDeclID++;
3050
3051 ID = IDR;
3052
3053 assert(ID >= FirstDeclID && "invalid decl ID");
3054
3055 RecordData Record;
3056 ASTDeclWriter W(*this, Context, Record, GeneratingReducedBMI);
3057
3058 // Build a record for this declaration
3059 W.Visit(D);
3060
3061 // Emit this declaration to the bitstream.
3062 uint64_t Offset = W.Emit(D);
3063
3064 // Record the offset for this declaration
3065 SourceLocation Loc = D->getLocation();
3066 SourceLocationEncoding::RawLocEncoding RawLoc =
3067 getRawSourceLocationEncoding(Loc: getAdjustedLocation(Loc));
3068
3069 unsigned Index = ID.getRawValue() - FirstDeclID.getRawValue();
3070 if (DeclOffsets.size() == Index)
3071 DeclOffsets.emplace_back(args&: RawLoc, args&: Offset, args&: DeclTypesBlockStartOffset);
3072 else if (DeclOffsets.size() < Index) {
3073 // FIXME: Can/should this happen?
3074 DeclOffsets.resize(new_size: Index+1);
3075 DeclOffsets[Index].setRawLoc(RawLoc);
3076 DeclOffsets[Index].setBitOffset(Offset, DeclTypesBlockStartOffset);
3077 } else {
3078 llvm_unreachable("declarations should be emitted in ID order");
3079 }
3080
3081 SourceManager &SM = Context.getSourceManager();
3082 if (Loc.isValid() && SM.isLocalSourceLocation(Loc))
3083 associateDeclWithFile(D, ID);
3084
3085 // Note declarations that should be deserialized eagerly so that we can add
3086 // them to a record in the AST file later.
3087 if (isRequiredDecl(D, Context, WritingModule))
3088 AddDeclRef(D, Record&: EagerlyDeserializedDecls);
3089}
3090
3091void ASTRecordWriter::AddFunctionDefinition(const FunctionDecl *FD) {
3092 // Switch case IDs are per function body.
3093 Writer->ClearSwitchCaseIDs();
3094
3095 assert(FD->doesThisDeclarationHaveABody());
3096 bool ModulesCodegen = shouldFunctionGenerateHereOnly(FD);
3097 Record->push_back(Elt: ModulesCodegen);
3098 if (ModulesCodegen)
3099 Writer->AddDeclRef(D: FD, Record&: Writer->ModularCodegenDecls);
3100 if (auto *CD = dyn_cast<CXXConstructorDecl>(Val: FD)) {
3101 Record->push_back(Elt: CD->getNumCtorInitializers());
3102 if (CD->getNumCtorInitializers())
3103 AddCXXCtorInitializers(CtorInits: llvm::ArrayRef(CD->init_begin(), CD->init_end()));
3104 }
3105 AddStmt(S: FD->getBody());
3106}
3107