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 VisitExplicitInstantiationDecl(ExplicitInstantiationDecl *D);
148 void VisitCXXExpansionStmtDecl(CXXExpansionStmtDecl *D);
149 void VisitBlockDecl(BlockDecl *D);
150 void VisitOutlinedFunctionDecl(OutlinedFunctionDecl *D);
151 void VisitCapturedDecl(CapturedDecl *D);
152 void VisitEmptyDecl(EmptyDecl *D);
153 void VisitLifetimeExtendedTemporaryDecl(LifetimeExtendedTemporaryDecl *D);
154 void VisitDeclContext(DeclContext *DC);
155 template <typename T> void VisitRedeclarable(Redeclarable<T> *D);
156 void VisitHLSLBufferDecl(HLSLBufferDecl *D);
157
158 // FIXME: Put in the same order is DeclNodes.td?
159 void VisitObjCMethodDecl(ObjCMethodDecl *D);
160 void VisitObjCTypeParamDecl(ObjCTypeParamDecl *D);
161 void VisitObjCContainerDecl(ObjCContainerDecl *D);
162 void VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
163 void VisitObjCIvarDecl(ObjCIvarDecl *D);
164 void VisitObjCProtocolDecl(ObjCProtocolDecl *D);
165 void VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D);
166 void VisitObjCCategoryDecl(ObjCCategoryDecl *D);
167 void VisitObjCImplDecl(ObjCImplDecl *D);
168 void VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
169 void VisitObjCImplementationDecl(ObjCImplementationDecl *D);
170 void VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D);
171 void VisitObjCPropertyDecl(ObjCPropertyDecl *D);
172 void VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D);
173 void VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D);
174 void VisitOMPAllocateDecl(OMPAllocateDecl *D);
175 void VisitOMPRequiresDecl(OMPRequiresDecl *D);
176 void VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D);
177 void VisitOMPDeclareMapperDecl(OMPDeclareMapperDecl *D);
178 void VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D);
179
180 void VisitOpenACCDeclareDecl(OpenACCDeclareDecl *D);
181 void VisitOpenACCRoutineDecl(OpenACCRoutineDecl *D);
182
183 /// Add an Objective-C type parameter list to the given record.
184 void AddObjCTypeParamList(ObjCTypeParamList *typeParams) {
185 // Empty type parameter list.
186 if (!typeParams) {
187 Record.push_back(N: 0);
188 return;
189 }
190
191 Record.push_back(N: typeParams->size());
192 for (auto *typeParam : *typeParams) {
193 Record.AddDeclRef(D: typeParam);
194 }
195 Record.AddSourceLocation(Loc: typeParams->getLAngleLoc());
196 Record.AddSourceLocation(Loc: typeParams->getRAngleLoc());
197 }
198
199 /// Add to the record the first declaration from each module file that
200 /// provides a declaration of D. The intent is to provide a sufficient
201 /// set such that reloading this set will load all current redeclarations.
202 void AddFirstDeclFromEachModule(const Decl *D, bool IncludeLocal) {
203 auto Firsts = Writer.CollectFirstDeclFromEachModule(D, IncludeLocal);
204 for (const auto &[_, First] : Firsts)
205 Record.AddDeclRef(D: First);
206 }
207
208 template <typename T> bool shouldSkipWritingSpecializations(T *Spec) {
209 // Now we will only avoid writing specializations if we're generating
210 // reduced BMI.
211 if (!GeneratingReducedBMI)
212 return false;
213
214 assert((isa<FunctionDecl, ClassTemplateSpecializationDecl,
215 VarTemplateSpecializationDecl>(Spec)));
216
217 ArrayRef<TemplateArgument> Args;
218 if (auto *CTSD = dyn_cast<ClassTemplateSpecializationDecl>(Spec))
219 Args = CTSD->getTemplateArgs().asArray();
220 else if (auto *VTSD = dyn_cast<VarTemplateSpecializationDecl>(Spec))
221 Args = VTSD->getTemplateArgs().asArray();
222 else
223 Args = cast<FunctionDecl>(Spec)
224 ->getTemplateSpecializationArgs()
225 ->asArray();
226
227 // If there is any template argument is TULocal, we can avoid writing the
228 // specialization since the consumers of reduced BMI won't get the
229 // specialization anyway.
230 for (const TemplateArgument &TA : Args) {
231 switch (TA.getKind()) {
232 case TemplateArgument::Type: {
233 Linkage L = TA.getAsType()->getLinkage();
234 if (!isExternallyVisible(L))
235 return true;
236 break;
237 }
238 case TemplateArgument::Declaration:
239 if (!TA.getAsDecl()->isExternallyVisible())
240 return true;
241 break;
242 default:
243 break;
244 }
245 }
246
247 return false;
248 }
249
250 /// Add to the record the first template specialization from each module
251 /// file that provides a declaration of D. We store the DeclId and an
252 /// ODRHash of the template arguments of D which should provide enough
253 /// information to load D only if the template instantiator needs it.
254 void AddFirstSpecializationDeclFromEachModule(
255 const Decl *D, llvm::SmallVectorImpl<const Decl *> &SpecsInMap,
256 llvm::SmallVectorImpl<const Decl *> &PartialSpecsInMap) {
257 assert((isa<ClassTemplateSpecializationDecl>(D) ||
258 isa<VarTemplateSpecializationDecl>(D) || isa<FunctionDecl>(D)) &&
259 "Must not be called with other decls");
260 auto Firsts =
261 Writer.CollectFirstDeclFromEachModule(D, /*IncludeLocal=*/true);
262 for (const auto &[_, First] : Firsts) {
263 if (shouldSkipWritingSpecializations(Spec: First))
264 continue;
265
266 if (isa<ClassTemplatePartialSpecializationDecl,
267 VarTemplatePartialSpecializationDecl>(Val: First))
268 PartialSpecsInMap.push_back(Elt: First);
269 else
270 SpecsInMap.push_back(Elt: First);
271 }
272 }
273
274 /// Get the specialization decl from an entry in the specialization list.
275 template <typename EntryType>
276 typename RedeclarableTemplateDecl::SpecEntryTraits<EntryType>::DeclType *
277 getSpecializationDecl(EntryType &T) {
278 return RedeclarableTemplateDecl::SpecEntryTraits<EntryType>::getDecl(&T);
279 }
280
281 /// Get the list of partial specializations from a template's common ptr.
282 template<typename T>
283 decltype(T::PartialSpecializations) &getPartialSpecializations(T *Common) {
284 return Common->PartialSpecializations;
285 }
286 MutableArrayRef<FunctionTemplateSpecializationInfo>
287 getPartialSpecializations(FunctionTemplateDecl::Common *) {
288 return {};
289 }
290
291 template<typename DeclTy>
292 void AddTemplateSpecializations(DeclTy *D) {
293 auto *Common = D->getCommonPtr();
294
295 // If we have any lazy specializations, and the external AST source is
296 // our chained AST reader, we can just write out the DeclIDs. Otherwise,
297 // we need to resolve them to actual declarations.
298 if (Writer.Chain != Record.getASTContext().getExternalSource() &&
299 Writer.Chain && Writer.Chain->haveUnloadedSpecializations(D)) {
300 D->LoadLazySpecializations();
301 assert(!Writer.Chain->haveUnloadedSpecializations(D));
302 }
303
304 // AddFirstSpecializationDeclFromEachModule might trigger deserialization,
305 // invalidating *Specializations iterators.
306 llvm::SmallVector<const Decl *, 16> AllSpecs;
307 for (auto &Entry : Common->Specializations)
308 AllSpecs.push_back(Elt: getSpecializationDecl(Entry));
309 for (auto &Entry : getPartialSpecializations(Common))
310 AllSpecs.push_back(Elt: getSpecializationDecl(Entry));
311
312 llvm::SmallVector<const Decl *, 16> Specs;
313 llvm::SmallVector<const Decl *, 16> PartialSpecs;
314 for (auto *D : AllSpecs) {
315 assert(D->isCanonicalDecl() && "non-canonical decl in set");
316 AddFirstSpecializationDeclFromEachModule(D, SpecsInMap&: Specs, PartialSpecsInMap&: PartialSpecs);
317 }
318
319 Record.AddOffset(BitOffset: Writer.WriteSpecializationInfoLookupTable(
320 D, Specializations&: Specs, /*IsPartial=*/false));
321
322 // Function Template Decl doesn't have partial decls.
323 if (isa<FunctionTemplateDecl>(D)) {
324 assert(PartialSpecs.empty());
325 return;
326 }
327
328 Record.AddOffset(BitOffset: Writer.WriteSpecializationInfoLookupTable(
329 D, Specializations&: PartialSpecs, /*IsPartial=*/true));
330 }
331
332 /// Ensure that this template specialization is associated with the specified
333 /// template on reload.
334 void RegisterTemplateSpecialization(const Decl *Template,
335 const Decl *Specialization) {
336 Template = Template->getCanonicalDecl();
337
338 // If the canonical template is local, we'll write out this specialization
339 // when we emit it.
340 // FIXME: We can do the same thing if there is any local declaration of
341 // the template, to avoid emitting an update record.
342 if (!Template->isFromASTFile())
343 return;
344
345 // We only need to associate the first local declaration of the
346 // specialization. The other declarations will get pulled in by it.
347 if (Writer.getFirstLocalDecl(D: Specialization) != Specialization)
348 return;
349
350 if (isa<ClassTemplatePartialSpecializationDecl,
351 VarTemplatePartialSpecializationDecl>(Val: Specialization))
352 Writer.PartialSpecializationsUpdates[cast<NamedDecl>(Val: Template)]
353 .push_back(Elt: cast<NamedDecl>(Val: Specialization));
354 else
355 Writer.SpecializationsUpdates[cast<NamedDecl>(Val: Template)].push_back(
356 Elt: cast<NamedDecl>(Val: Specialization));
357 }
358 };
359}
360
361// When building a C++20 module interface unit or a partition unit, a
362// strong definition in the module interface is provided by the
363// compilation of that unit, not by its users. (Inline variables are still
364// emitted in module users.)
365static bool shouldVarGenerateHereOnly(const VarDecl *VD) {
366 if (VD->getStorageDuration() != SD_Static &&
367 VD->getStorageDuration() != SD_Thread)
368 return false;
369
370 if (VD->getDescribedVarTemplate())
371 return false;
372
373 Module *M = VD->getOwningModule();
374 if (!M)
375 return false;
376
377 M = M->getTopLevelModule();
378 ASTContext &Ctx = VD->getASTContext();
379 if (!M->isInterfaceOrPartition() &&
380 (!VD->hasAttr<DLLExportAttr>() ||
381 !Ctx.getLangOpts().BuildingPCHWithObjectFile))
382 return false;
383
384 return Ctx.GetGVALinkageForVariable(VD) >= GVA_StrongExternal;
385}
386
387static bool shouldFunctionGenerateHereOnly(const FunctionDecl *FD) {
388 if (FD->isDependentContext())
389 return false;
390
391 ASTContext &Ctx = FD->getASTContext();
392 auto Linkage = Ctx.GetGVALinkageForFunction(FD);
393 if (Ctx.getLangOpts().ModulesCodegen ||
394 (FD->hasAttr<DLLExportAttr>() &&
395 Ctx.getLangOpts().BuildingPCHWithObjectFile))
396 // Under -fmodules-codegen, codegen is performed for all non-internal,
397 // non-always_inline functions, unless they are available elsewhere.
398 if (!FD->hasAttr<AlwaysInlineAttr>() && Linkage != GVA_Internal &&
399 Linkage != GVA_AvailableExternally)
400 return true;
401
402 Module *M = FD->getOwningModule();
403 if (!M)
404 return false;
405
406 M = M->getTopLevelModule();
407 if (M->isInterfaceOrPartition())
408 if (Linkage >= GVA_StrongExternal)
409 return true;
410
411 return false;
412}
413
414bool clang::CanElideDeclDef(const Decl *D) {
415 if (auto *FD = dyn_cast<FunctionDecl>(Val: D)) {
416 if (FD->isInlined() || FD->isConstexpr() || FD->isConsteval())
417 return false;
418
419 // If the function should be generated somewhere else, we shouldn't elide
420 // it.
421 if (!shouldFunctionGenerateHereOnly(FD))
422 return false;
423 }
424
425 if (auto *VD = dyn_cast<VarDecl>(Val: D)) {
426 if (VD->getDeclContext()->isDependentContext())
427 return false;
428
429 // Constant initialized variable may not affect the ABI, but they
430 // may be used in constant evaluation in the frontend, so we have
431 // to remain them.
432 if (VD->hasConstantInitialization() || VD->isConstexpr())
433 return false;
434
435 // If the variable should be generated somewhere else, we shouldn't elide
436 // it.
437 if (!shouldVarGenerateHereOnly(VD))
438 return false;
439 }
440
441 return true;
442}
443
444void ASTDeclWriter::Visit(Decl *D) {
445 DeclVisitor<ASTDeclWriter>::Visit(D);
446
447 // Source locations require array (variable-length) abbreviations. The
448 // abbreviation infrastructure requires that arrays are encoded last, so
449 // we handle it here in the case of those classes derived from DeclaratorDecl
450 if (auto *DD = dyn_cast<DeclaratorDecl>(Val: D)) {
451 if (auto *TInfo = DD->getTypeSourceInfo())
452 Record.AddTypeLoc(TL: TInfo->getTypeLoc());
453 }
454
455 // Handle FunctionDecl's body here and write it after all other Stmts/Exprs
456 // have been written. We want it last because we will not read it back when
457 // retrieving it from the AST, we'll just lazily set the offset.
458 if (auto *FD = dyn_cast<FunctionDecl>(Val: D)) {
459 if (!GeneratingReducedBMI || !CanElideDeclDef(D: FD)) {
460 Record.push_back(N: FD->doesThisDeclarationHaveABody());
461 if (FD->doesThisDeclarationHaveABody())
462 Record.AddFunctionDefinition(FD);
463 } else
464 Record.push_back(N: 0);
465 }
466
467 // Similar to FunctionDecls, handle VarDecl's initializer here and write it
468 // after all other Stmts/Exprs. We will not read the initializer until after
469 // we have finished recursive deserialization, because it can recursively
470 // refer back to the variable.
471 if (auto *VD = dyn_cast<VarDecl>(Val: D)) {
472 if (!GeneratingReducedBMI || !CanElideDeclDef(D: VD))
473 Record.AddVarDeclInit(VD);
474 else
475 Record.push_back(N: 0);
476 }
477
478 // And similarly for FieldDecls. We already serialized whether there is a
479 // default member initializer.
480 if (auto *FD = dyn_cast<FieldDecl>(Val: D)) {
481 if (FD->hasInClassInitializer()) {
482 if (Expr *Init = FD->getInClassInitializer()) {
483 Record.push_back(N: 1);
484 Record.AddStmt(S: Init);
485 } else {
486 Record.push_back(N: 0);
487 // Initializer has not been instantiated yet.
488 }
489 }
490 }
491
492 // If this declaration is also a DeclContext, write blocks for the
493 // declarations that lexically stored inside its context and those
494 // declarations that are visible from its context.
495 if (auto *DC = dyn_cast<DeclContext>(Val: D))
496 VisitDeclContext(DC);
497}
498
499void ASTDeclWriter::VisitDecl(Decl *D) {
500 BitsPacker DeclBits;
501
502 // The order matters here. It will be better to put the bit with higher
503 // probability to be 0 in the end of the bits.
504 //
505 // Since we're using VBR6 format to store it.
506 // It will be pretty effient if all the higher bits are 0.
507 // For example, if we need to pack 8 bits into a value and the stored value
508 // is 0xf0, the actual stored value will be 0b000111'110000, which takes 12
509 // bits actually. However, if we changed the order to be 0x0f, then we can
510 // store it as 0b001111, which takes 6 bits only now.
511 DeclBits.addBits(Value: (uint64_t)D->getModuleOwnershipKind(), /*BitWidth=*/BitsWidth: 3);
512 DeclBits.addBit(Value: D->isThisDeclarationReferenced());
513 // If we're writing a BMI for a named module unit, we can treat all decls as in
514 // the BMI as used. Otherwise, the consumer need to mark it as used again, this
515 // simply waste time.
516 DeclBits.addBit(Value: Writer.isWritingStdCXXNamedModules() ? true : D->isUsed(CheckUsedAttr: false));
517 DeclBits.addBits(Value: D->getAccess(), /*BitWidth=*/BitsWidth: 2);
518 DeclBits.addBit(Value: D->isImplicit());
519 DeclBits.addBit(Value: D->getDeclContext() != D->getLexicalDeclContext());
520 DeclBits.addBit(Value: D->hasAttrs());
521 DeclBits.addBit(Value: D->isTopLevelDeclInObjCContainer());
522 DeclBits.addBit(Value: D->isInvalidDecl());
523 Record.push_back(N: DeclBits);
524
525 Record.AddDeclRef(D: cast_or_null<Decl>(Val: D->getDeclContext()));
526 if (D->getDeclContext() != D->getLexicalDeclContext())
527 Record.AddDeclRef(D: cast_or_null<Decl>(Val: D->getLexicalDeclContext()));
528
529 if (D->hasAttrs())
530 Record.AddAttributes(Attrs: D->getAttrs());
531
532 Record.push_back(N: Writer.getSubmoduleID(Mod: D->getOwningModule()));
533
534 // If this declaration injected a name into a context different from its
535 // lexical context, and that context is an imported namespace, we need to
536 // update its visible declarations to include this name.
537 //
538 // This happens when we instantiate a class with a friend declaration or a
539 // function with a local extern declaration, for instance.
540 //
541 // FIXME: Can we handle this in AddedVisibleDecl instead?
542 if (D->isOutOfLine()) {
543 auto *DC = D->getDeclContext();
544 while (auto *NS = dyn_cast<NamespaceDecl>(Val: DC->getRedeclContext())) {
545 if (!NS->isFromASTFile())
546 break;
547 Writer.UpdatedDeclContexts.insert(X: NS->getPrimaryContext());
548 if (!NS->isInlineNamespace())
549 break;
550 DC = NS->getParent();
551 }
552 }
553}
554
555void ASTDeclWriter::VisitPragmaCommentDecl(PragmaCommentDecl *D) {
556 StringRef Arg = D->getArg();
557 Record.push_back(N: Arg.size());
558 VisitDecl(D);
559 Record.AddSourceLocation(Loc: D->getBeginLoc());
560 Record.push_back(N: D->getCommentKind());
561 Record.AddString(Str: Arg);
562 Code = serialization::DECL_PRAGMA_COMMENT;
563}
564
565void ASTDeclWriter::VisitPragmaDetectMismatchDecl(
566 PragmaDetectMismatchDecl *D) {
567 StringRef Name = D->getName();
568 StringRef Value = D->getValue();
569 Record.push_back(N: Name.size() + 1 + Value.size());
570 VisitDecl(D);
571 Record.AddSourceLocation(Loc: D->getBeginLoc());
572 Record.AddString(Str: Name);
573 Record.AddString(Str: Value);
574 Code = serialization::DECL_PRAGMA_DETECT_MISMATCH;
575}
576
577void ASTDeclWriter::VisitTranslationUnitDecl(TranslationUnitDecl *D) {
578 llvm_unreachable("Translation units aren't directly serialized");
579}
580
581void ASTDeclWriter::VisitNamedDecl(NamedDecl *D) {
582 VisitDecl(D);
583 Record.AddDeclarationName(Name: D->getDeclName());
584 Record.push_back(N: needsAnonymousDeclarationNumber(D)
585 ? Writer.getAnonymousDeclarationNumber(D)
586 : 0);
587}
588
589void ASTDeclWriter::VisitTypeDecl(TypeDecl *D) {
590 VisitNamedDecl(D);
591 Record.AddSourceLocation(Loc: D->getBeginLoc());
592 if (!isa<TagDecl, TypedefDecl, TypeAliasDecl>(Val: D))
593 Record.AddTypeRef(T: QualType(D->getTypeForDecl(), 0));
594}
595
596void ASTDeclWriter::VisitTypedefNameDecl(TypedefNameDecl *D) {
597 VisitRedeclarable(D);
598 VisitTypeDecl(D);
599 Record.AddTypeSourceInfo(TInfo: D->getTypeSourceInfo());
600 Record.push_back(N: D->isModed());
601 if (D->isModed())
602 Record.AddTypeRef(T: D->getUnderlyingType());
603 Record.AddDeclRef(D: D->getAnonDeclWithTypedefName(AnyRedecl: false));
604}
605
606void ASTDeclWriter::VisitTypedefDecl(TypedefDecl *D) {
607 VisitTypedefNameDecl(D);
608 if (D->getDeclContext() == D->getLexicalDeclContext() &&
609 !D->hasAttrs() &&
610 !D->isImplicit() &&
611 D->getFirstDecl() == D->getMostRecentDecl() &&
612 !D->isInvalidDecl() &&
613 !D->isTopLevelDeclInObjCContainer() &&
614 !D->isModulePrivate() &&
615 !needsAnonymousDeclarationNumber(D) &&
616 D->getDeclName().getNameKind() == DeclarationName::Identifier)
617 AbbrevToUse = Writer.getDeclTypedefAbbrev();
618
619 Code = serialization::DECL_TYPEDEF;
620}
621
622void ASTDeclWriter::VisitTypeAliasDecl(TypeAliasDecl *D) {
623 VisitTypedefNameDecl(D);
624 Record.AddDeclRef(D: D->getDescribedAliasTemplate());
625 Code = serialization::DECL_TYPEALIAS;
626}
627
628void ASTDeclWriter::VisitTagDecl(TagDecl *D) {
629 static_assert(DeclContext::NumTagDeclBits == 23,
630 "You need to update the serializer after you change the "
631 "TagDeclBits");
632
633 VisitRedeclarable(D);
634 VisitTypeDecl(D);
635 Record.push_back(N: D->getIdentifierNamespace());
636
637 BitsPacker TagDeclBits;
638 TagDeclBits.addBits(Value: llvm::to_underlying(E: D->getTagKind()), /*BitWidth=*/BitsWidth: 3);
639 TagDeclBits.addBit(Value: !isa<CXXRecordDecl>(Val: D) ? D->isCompleteDefinition() : 0);
640 TagDeclBits.addBit(Value: D->isEmbeddedInDeclarator());
641 TagDeclBits.addBit(Value: D->isFreeStanding());
642 TagDeclBits.addBit(Value: D->isCompleteDefinitionRequired());
643 TagDeclBits.addBits(
644 Value: D->hasExtInfo() ? 1 : (D->getTypedefNameForAnonDecl() ? 2 : 0),
645 /*BitWidth=*/BitsWidth: 2);
646 Record.push_back(N: TagDeclBits);
647
648 Record.AddSourceRange(Range: D->getBraceRange());
649
650 if (D->hasExtInfo()) {
651 Record.AddQualifierInfo(Info: *D->getExtInfo());
652 } else if (auto *TD = D->getTypedefNameForAnonDecl()) {
653 Record.AddDeclRef(D: TD);
654 Record.AddIdentifierRef(II: TD->getDeclName().getAsIdentifierInfo());
655 }
656}
657
658void ASTDeclWriter::VisitEnumDecl(EnumDecl *D) {
659 static_assert(DeclContext::NumEnumDeclBits == 43,
660 "You need to update the serializer after you change the "
661 "EnumDeclBits");
662
663 VisitTagDecl(D);
664 Record.AddTypeSourceInfo(TInfo: D->getIntegerTypeSourceInfo());
665 if (!D->getIntegerTypeSourceInfo())
666 Record.AddTypeRef(T: D->getIntegerType());
667 Record.AddTypeRef(T: D->getPromotionType());
668
669 BitsPacker EnumDeclBits;
670 EnumDeclBits.addBits(Value: D->getNumPositiveBits(), /*BitWidth=*/BitsWidth: 8);
671 EnumDeclBits.addBits(Value: D->getNumNegativeBits(), /*BitWidth=*/BitsWidth: 8);
672 EnumDeclBits.addBit(Value: D->isScoped());
673 EnumDeclBits.addBit(Value: D->isScopedUsingClassTag());
674 EnumDeclBits.addBit(Value: D->isFixed());
675 Record.push_back(N: EnumDeclBits);
676
677 Record.push_back(N: D->getODRHash());
678
679 if (MemberSpecializationInfo *MemberInfo = D->getMemberSpecializationInfo()) {
680 Record.AddDeclRef(D: MemberInfo->getInstantiatedFrom());
681 Record.push_back(N: MemberInfo->getTemplateSpecializationKind());
682 Record.AddSourceLocation(Loc: MemberInfo->getPointOfInstantiation());
683 } else {
684 Record.AddDeclRef(D: nullptr);
685 }
686
687 if (D->getDeclContext() == D->getLexicalDeclContext() && !D->hasAttrs() &&
688 !D->isInvalidDecl() && !D->isImplicit() && !D->hasExtInfo() &&
689 !D->getTypedefNameForAnonDecl() &&
690 D->getFirstDecl() == D->getMostRecentDecl() &&
691 !D->isTopLevelDeclInObjCContainer() &&
692 !CXXRecordDecl::classofKind(K: D->getKind()) &&
693 !D->getIntegerTypeSourceInfo() && !D->getMemberSpecializationInfo() &&
694 !needsAnonymousDeclarationNumber(D) &&
695 D->getDeclName().getNameKind() == DeclarationName::Identifier)
696 AbbrevToUse = Writer.getDeclEnumAbbrev();
697
698 Code = serialization::DECL_ENUM;
699}
700
701void ASTDeclWriter::VisitRecordDecl(RecordDecl *D) {
702 static_assert(DeclContext::NumRecordDeclBits == 64,
703 "You need to update the serializer after you change the "
704 "RecordDeclBits");
705
706 VisitTagDecl(D);
707
708 BitsPacker RecordDeclBits;
709 RecordDeclBits.addBit(Value: D->hasFlexibleArrayMember());
710 RecordDeclBits.addBit(Value: D->isAnonymousStructOrUnion());
711 RecordDeclBits.addBit(Value: D->hasObjectMember());
712 RecordDeclBits.addBit(Value: D->hasVolatileMember());
713 RecordDeclBits.addBit(Value: D->isNonTrivialToPrimitiveDefaultInitialize());
714 RecordDeclBits.addBit(Value: D->isNonTrivialToPrimitiveCopy());
715 RecordDeclBits.addBit(Value: D->isNonTrivialToPrimitiveDestroy());
716 RecordDeclBits.addBit(Value: D->hasNonTrivialToPrimitiveDefaultInitializeCUnion());
717 RecordDeclBits.addBit(Value: D->hasNonTrivialToPrimitiveDestructCUnion());
718 RecordDeclBits.addBit(Value: D->hasNonTrivialToPrimitiveCopyCUnion());
719 RecordDeclBits.addBit(Value: D->hasUninitializedExplicitInitFields());
720 RecordDeclBits.addBit(Value: D->isParamDestroyedInCallee());
721 RecordDeclBits.addBits(Value: llvm::to_underlying(E: D->getArgPassingRestrictions()), BitsWidth: 2);
722 Record.push_back(N: RecordDeclBits);
723
724 // Only compute this for C/Objective-C, in C++ this is computed as part
725 // of CXXRecordDecl.
726 if (!isa<CXXRecordDecl>(Val: D))
727 Record.push_back(N: D->getODRHash());
728
729 if (D->getDeclContext() == D->getLexicalDeclContext() && !D->hasAttrs() &&
730 !D->isImplicit() && !D->isInvalidDecl() && !D->hasExtInfo() &&
731 !D->getTypedefNameForAnonDecl() &&
732 D->getFirstDecl() == D->getMostRecentDecl() &&
733 !D->isTopLevelDeclInObjCContainer() &&
734 !CXXRecordDecl::classofKind(K: D->getKind()) &&
735 !needsAnonymousDeclarationNumber(D) &&
736 D->getDeclName().getNameKind() == DeclarationName::Identifier)
737 AbbrevToUse = Writer.getDeclRecordAbbrev();
738
739 Code = serialization::DECL_RECORD;
740}
741
742void ASTDeclWriter::VisitValueDecl(ValueDecl *D) {
743 VisitNamedDecl(D);
744 Record.AddTypeRef(T: D->getType());
745}
746
747void ASTDeclWriter::VisitEnumConstantDecl(EnumConstantDecl *D) {
748 VisitValueDecl(D);
749 Record.push_back(N: D->getInitExpr()? 1 : 0);
750 if (D->getInitExpr())
751 Record.AddStmt(S: D->getInitExpr());
752 Record.AddAPSInt(Value: D->getInitVal());
753
754 Code = serialization::DECL_ENUM_CONSTANT;
755}
756
757void ASTDeclWriter::VisitDeclaratorDecl(DeclaratorDecl *D) {
758 VisitValueDecl(D);
759 Record.AddSourceLocation(Loc: D->getInnerLocStart());
760 Record.push_back(N: D->hasExtInfo());
761 if (D->hasExtInfo()) {
762 DeclaratorDecl::ExtInfo *Info = D->getExtInfo();
763 Record.AddQualifierInfo(Info: *Info);
764 Record.AddStmt(
765 S: const_cast<Expr *>(Info->TrailingRequiresClause.ConstraintExpr));
766 Record.writeUnsignedOrNone(Value: Info->TrailingRequiresClause.ArgPackSubstIndex);
767 }
768 // The location information is deferred until the end of the record.
769 Record.AddTypeRef(T: D->getTypeSourceInfo() ? D->getTypeSourceInfo()->getType()
770 : QualType());
771}
772
773void ASTDeclWriter::VisitFunctionDecl(FunctionDecl *D) {
774 static_assert(DeclContext::NumFunctionDeclBits == 45,
775 "You need to update the serializer after you change the "
776 "FunctionDeclBits");
777
778 VisitRedeclarable(D);
779
780 Record.push_back(N: D->getTemplatedKind());
781 switch (D->getTemplatedKind()) {
782 case FunctionDecl::TK_NonTemplate:
783 break;
784 case FunctionDecl::TK_DependentNonTemplate:
785 Record.AddDeclRef(D: D->getInstantiatedFromDecl());
786 break;
787 case FunctionDecl::TK_FunctionTemplate:
788 Record.AddDeclRef(D: D->getDescribedFunctionTemplate());
789 break;
790 case FunctionDecl::TK_MemberSpecialization: {
791 MemberSpecializationInfo *MemberInfo = D->getMemberSpecializationInfo();
792 Record.AddDeclRef(D: MemberInfo->getInstantiatedFrom());
793 Record.push_back(N: MemberInfo->getTemplateSpecializationKind());
794 Record.AddSourceLocation(Loc: MemberInfo->getPointOfInstantiation());
795 break;
796 }
797 case FunctionDecl::TK_FunctionTemplateSpecialization: {
798 FunctionTemplateSpecializationInfo *
799 FTSInfo = D->getTemplateSpecializationInfo();
800
801 RegisterTemplateSpecialization(Template: FTSInfo->getTemplate(), Specialization: D);
802
803 Record.AddDeclRef(D: FTSInfo->getTemplate());
804 Record.push_back(N: FTSInfo->getTemplateSpecializationKind());
805
806 // Template arguments.
807 Record.AddTemplateArgumentList(TemplateArgs: FTSInfo->TemplateArguments);
808
809 // Template args as written.
810 Record.push_back(N: FTSInfo->TemplateArgumentsAsWritten != nullptr);
811 if (FTSInfo->TemplateArgumentsAsWritten)
812 Record.AddASTTemplateArgumentListInfo(
813 ASTTemplArgList: FTSInfo->TemplateArgumentsAsWritten);
814
815 Record.AddSourceLocation(Loc: FTSInfo->getPointOfInstantiation());
816
817 if (MemberSpecializationInfo *MemberInfo =
818 FTSInfo->getMemberSpecializationInfo()) {
819 Record.push_back(N: 1);
820 Record.AddDeclRef(D: MemberInfo->getInstantiatedFrom());
821 Record.push_back(N: MemberInfo->getTemplateSpecializationKind());
822 Record.AddSourceLocation(Loc: MemberInfo->getPointOfInstantiation());
823 } else {
824 Record.push_back(N: 0);
825 }
826
827 if (D->isCanonicalDecl()) {
828 // Write the template that contains the specializations set. We will
829 // add a FunctionTemplateSpecializationInfo to it when reading.
830 Record.AddDeclRef(D: FTSInfo->getTemplate()->getCanonicalDecl());
831 }
832 break;
833 }
834 case FunctionDecl::TK_DependentFunctionTemplateSpecialization: {
835 DependentFunctionTemplateSpecializationInfo *
836 DFTSInfo = D->getDependentSpecializationInfo();
837
838 // Candidates.
839 Record.push_back(N: DFTSInfo->getCandidates().size());
840 for (FunctionTemplateDecl *FTD : DFTSInfo->getCandidates())
841 Record.AddDeclRef(D: FTD);
842
843 // Templates args.
844 Record.push_back(N: DFTSInfo->TemplateArgumentsAsWritten != nullptr);
845 if (DFTSInfo->TemplateArgumentsAsWritten)
846 Record.AddASTTemplateArgumentListInfo(
847 ASTTemplArgList: DFTSInfo->TemplateArgumentsAsWritten);
848 break;
849 }
850 }
851
852 VisitDeclaratorDecl(D);
853 Record.AddDeclarationNameLoc(DNLoc: D->DNLoc, Name: D->getDeclName());
854 Record.push_back(N: D->getIdentifierNamespace());
855
856 // The order matters here. It will be better to put the bit with higher
857 // probability to be 0 in the end of the bits. See the comments in VisitDecl
858 // for details.
859 BitsPacker FunctionDeclBits;
860 // FIXME: stable encoding
861 FunctionDeclBits.addBits(Value: llvm::to_underlying(E: D->getLinkageInternal()), BitsWidth: 3);
862 FunctionDeclBits.addBits(Value: (uint32_t)D->getStorageClass(), /*BitWidth=*/BitsWidth: 3);
863 FunctionDeclBits.addBit(Value: D->isInlineSpecified());
864 FunctionDeclBits.addBit(Value: D->isInlined());
865 FunctionDeclBits.addBit(Value: D->hasSkippedBody());
866 FunctionDeclBits.addBit(Value: D->isVirtualAsWritten());
867 FunctionDeclBits.addBit(Value: D->isPureVirtual());
868 FunctionDeclBits.addBit(Value: D->hasInheritedPrototype());
869 FunctionDeclBits.addBit(Value: D->hasWrittenPrototype());
870 FunctionDeclBits.addBit(Value: D->isDeletedBit());
871 FunctionDeclBits.addBit(Value: D->isTrivial());
872 FunctionDeclBits.addBit(Value: D->isTrivialForCall());
873 FunctionDeclBits.addBit(Value: D->isDefaulted());
874 FunctionDeclBits.addBit(Value: D->isExplicitlyDefaulted());
875 FunctionDeclBits.addBit(Value: D->isIneligibleOrNotSelected());
876 FunctionDeclBits.addBits(Value: (uint64_t)(D->getConstexprKind()), /*BitWidth=*/BitsWidth: 2);
877 FunctionDeclBits.addBit(Value: D->hasImplicitReturnZero());
878 FunctionDeclBits.addBit(Value: D->isMultiVersion());
879 FunctionDeclBits.addBit(Value: D->isLateTemplateParsed());
880 FunctionDeclBits.addBit(Value: D->isInstantiatedFromMemberTemplate());
881 FunctionDeclBits.addBit(Value: D->FriendConstraintRefersToEnclosingTemplate());
882 FunctionDeclBits.addBit(Value: D->usesSEHTry());
883 FunctionDeclBits.addBit(Value: D->isDestroyingOperatorDelete());
884 FunctionDeclBits.addBit(Value: D->isTypeAwareOperatorNewOrDelete());
885 Record.push_back(N: FunctionDeclBits);
886
887 Record.AddSourceLocation(Loc: D->getEndLoc());
888 if (D->isExplicitlyDefaulted())
889 Record.AddSourceLocation(Loc: D->getDefaultLoc());
890
891 Record.push_back(N: D->getODRHash());
892
893 if (D->isDefaulted() || D->isDeletedAsWritten()) {
894 if (auto *FDI = D->getDefaultedOrDeletedInfo()) {
895 // Store both that there is an DefaultedOrDeletedInfo and whether it
896 // contains a DeletedMessage.
897 StringLiteral *DeletedMessage = FDI->getDeletedMessage();
898 Record.push_back(N: 1 | (DeletedMessage ? 2 : 0));
899 if (DeletedMessage)
900 Record.AddStmt(S: DeletedMessage);
901
902 Record.push_back(N: FDI->getFPFeatures().getAsOpaqueInt());
903
904 Record.push_back(N: FDI->getUnqualifiedLookups().size());
905 for (DeclAccessPair P : FDI->getUnqualifiedLookups()) {
906 Record.AddDeclRef(D: P.getDecl());
907 Record.push_back(N: P.getAccess());
908 }
909 } else {
910 Record.push_back(N: 0);
911 }
912 }
913
914 if (D->getFriendObjectKind()) {
915 // For a friend function defined inline within a class template, we have to
916 // force the definition to be the one inside the definition of the template
917 // class. Remember this relation to deserialize them together.
918 if (auto *RD = dyn_cast<CXXRecordDecl>(Val: D->getLexicalParent());
919 RD && isDefinitionInDependentContext(D: RD)) {
920 Writer.RelatedDeclsMap[Writer.GetDeclRef(D: RD)].push_back(
921 Elt: Writer.GetDeclRef(D));
922 }
923 }
924
925 // Ensure associated ExplicitInstantiationDecls survive reduced BMI.
926 for (auto *EID : Record.getASTContext().getExplicitInstantiationDecls(Spec: D))
927 Writer.GetDeclRef(D: EID);
928
929 Record.push_back(N: D->param_size());
930 for (auto *P : D->parameters())
931 Record.AddDeclRef(D: P);
932 Code = serialization::DECL_FUNCTION;
933}
934
935static void addExplicitSpecifier(ExplicitSpecifier ES,
936 ASTRecordWriter &Record) {
937 uint64_t Kind = static_cast<uint64_t>(ES.getKind());
938 Kind = Kind << 1 | static_cast<bool>(ES.getExpr());
939 Record.push_back(N: Kind);
940 if (ES.getExpr()) {
941 Record.AddStmt(S: ES.getExpr());
942 }
943}
944
945void ASTDeclWriter::VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *D) {
946 addExplicitSpecifier(ES: D->getExplicitSpecifier(), Record);
947 Record.AddDeclRef(D: D->Ctor);
948 VisitFunctionDecl(D);
949 Record.push_back(N: static_cast<unsigned char>(D->getDeductionCandidateKind()));
950 Record.AddDeclRef(D: D->getSourceDeductionGuide());
951 Record.push_back(
952 N: static_cast<unsigned char>(D->getSourceDeductionGuideKind()));
953 Code = serialization::DECL_CXX_DEDUCTION_GUIDE;
954}
955
956void ASTDeclWriter::VisitObjCMethodDecl(ObjCMethodDecl *D) {
957 static_assert(DeclContext::NumObjCMethodDeclBits == 37,
958 "You need to update the serializer after you change the "
959 "ObjCMethodDeclBits");
960
961 VisitNamedDecl(D);
962 // FIXME: convert to LazyStmtPtr?
963 // Unlike C/C++, method bodies will never be in header files.
964 bool HasBodyStuff = D->getBody() != nullptr;
965 Record.push_back(N: HasBodyStuff);
966 if (HasBodyStuff) {
967 Record.AddStmt(S: D->getBody());
968 }
969 Record.AddDeclRef(D: D->getSelfDecl());
970 Record.AddDeclRef(D: D->getCmdDecl());
971 Record.push_back(N: D->isInstanceMethod());
972 Record.push_back(N: D->isVariadic());
973 Record.push_back(N: D->isPropertyAccessor());
974 Record.push_back(N: D->isSynthesizedAccessorStub());
975 Record.push_back(N: D->isDefined());
976 Record.push_back(N: D->isOverriding());
977 Record.push_back(N: D->hasSkippedBody());
978
979 Record.push_back(N: D->isRedeclaration());
980 Record.push_back(N: D->hasRedeclaration());
981 if (D->hasRedeclaration()) {
982 assert(Record.getASTContext().getObjCMethodRedeclaration(D));
983 Record.AddDeclRef(D: Record.getASTContext().getObjCMethodRedeclaration(MD: D));
984 }
985
986 // FIXME: stable encoding for @required/@optional
987 Record.push_back(N: llvm::to_underlying(E: D->getImplementationControl()));
988 // FIXME: stable encoding for in/out/inout/bycopy/byref/oneway/nullability
989 Record.push_back(N: D->getObjCDeclQualifier());
990 Record.push_back(N: D->hasRelatedResultType());
991 Record.AddTypeRef(T: D->getReturnType());
992 Record.AddTypeSourceInfo(TInfo: D->getReturnTypeSourceInfo());
993 Record.AddSourceLocation(Loc: D->getEndLoc());
994 Record.push_back(N: D->param_size());
995 for (const auto *P : D->parameters())
996 Record.AddDeclRef(D: P);
997
998 Record.push_back(N: D->getSelLocsKind());
999 unsigned NumStoredSelLocs = D->getNumStoredSelLocs();
1000 SourceLocation *SelLocs = D->getStoredSelLocs();
1001 Record.push_back(N: NumStoredSelLocs);
1002 for (unsigned i = 0; i != NumStoredSelLocs; ++i)
1003 Record.AddSourceLocation(Loc: SelLocs[i]);
1004
1005 Code = serialization::DECL_OBJC_METHOD;
1006}
1007
1008void ASTDeclWriter::VisitObjCTypeParamDecl(ObjCTypeParamDecl *D) {
1009 VisitTypedefNameDecl(D);
1010 Record.push_back(N: D->Variance);
1011 Record.push_back(N: D->Index);
1012 Record.AddSourceLocation(Loc: D->VarianceLoc);
1013 Record.AddSourceLocation(Loc: D->ColonLoc);
1014
1015 Code = serialization::DECL_OBJC_TYPE_PARAM;
1016}
1017
1018void ASTDeclWriter::VisitObjCContainerDecl(ObjCContainerDecl *D) {
1019 static_assert(DeclContext::NumObjCContainerDeclBits == 64,
1020 "You need to update the serializer after you change the "
1021 "ObjCContainerDeclBits");
1022
1023 VisitNamedDecl(D);
1024 Record.AddSourceLocation(Loc: D->getAtStartLoc());
1025 Record.AddSourceRange(Range: D->getAtEndRange());
1026 // Abstract class (no need to define a stable serialization::DECL code).
1027}
1028
1029void ASTDeclWriter::VisitObjCInterfaceDecl(ObjCInterfaceDecl *D) {
1030 VisitRedeclarable(D);
1031 VisitObjCContainerDecl(D);
1032 Record.AddTypeRef(T: QualType(D->getTypeForDecl(), 0));
1033 AddObjCTypeParamList(typeParams: D->TypeParamList);
1034
1035 Record.push_back(N: D->isThisDeclarationADefinition());
1036 if (D->isThisDeclarationADefinition()) {
1037 // Write the DefinitionData
1038 ObjCInterfaceDecl::DefinitionData &Data = D->data();
1039
1040 Record.AddTypeSourceInfo(TInfo: D->getSuperClassTInfo());
1041 Record.AddSourceLocation(Loc: D->getEndOfDefinitionLoc());
1042 Record.push_back(N: Data.HasDesignatedInitializers);
1043 Record.push_back(N: D->getODRHash());
1044
1045 // Write out the protocols that are directly referenced by the @interface.
1046 Record.push_back(N: Data.ReferencedProtocols.size());
1047 for (const auto *P : D->protocols())
1048 Record.AddDeclRef(D: P);
1049 for (const auto &PL : D->protocol_locs())
1050 Record.AddSourceLocation(Loc: PL);
1051
1052 // Write out the protocols that are transitively referenced.
1053 Record.push_back(N: Data.AllReferencedProtocols.size());
1054 for (ObjCList<ObjCProtocolDecl>::iterator
1055 P = Data.AllReferencedProtocols.begin(),
1056 PEnd = Data.AllReferencedProtocols.end();
1057 P != PEnd; ++P)
1058 Record.AddDeclRef(D: *P);
1059
1060
1061 if (ObjCCategoryDecl *Cat = D->getCategoryListRaw()) {
1062 // Ensure that we write out the set of categories for this class.
1063 Writer.ObjCClassesWithCategories.insert(X: D);
1064
1065 // Make sure that the categories get serialized.
1066 for (; Cat; Cat = Cat->getNextClassCategoryRaw())
1067 (void)Writer.GetDeclRef(D: Cat);
1068 }
1069 }
1070
1071 Code = serialization::DECL_OBJC_INTERFACE;
1072}
1073
1074void ASTDeclWriter::VisitObjCIvarDecl(ObjCIvarDecl *D) {
1075 VisitFieldDecl(D);
1076 // FIXME: stable encoding for @public/@private/@protected/@package
1077 Record.push_back(N: D->getAccessControl());
1078 Record.push_back(N: D->getSynthesize());
1079
1080 if (D->getDeclContext() == D->getLexicalDeclContext() &&
1081 !D->hasAttrs() &&
1082 !D->isImplicit() &&
1083 !D->isUsed(CheckUsedAttr: false) &&
1084 !D->isInvalidDecl() &&
1085 !D->isReferenced() &&
1086 !D->isModulePrivate() &&
1087 !D->getBitWidth() &&
1088 !D->hasExtInfo() &&
1089 D->getDeclName())
1090 AbbrevToUse = Writer.getDeclObjCIvarAbbrev();
1091
1092 Code = serialization::DECL_OBJC_IVAR;
1093}
1094
1095void ASTDeclWriter::VisitObjCProtocolDecl(ObjCProtocolDecl *D) {
1096 VisitRedeclarable(D);
1097 VisitObjCContainerDecl(D);
1098
1099 Record.push_back(N: D->isThisDeclarationADefinition());
1100 if (D->isThisDeclarationADefinition()) {
1101 Record.push_back(N: D->protocol_size());
1102 for (const auto *I : D->protocols())
1103 Record.AddDeclRef(D: I);
1104 for (const auto &PL : D->protocol_locs())
1105 Record.AddSourceLocation(Loc: PL);
1106 Record.push_back(N: D->getODRHash());
1107 }
1108
1109 Code = serialization::DECL_OBJC_PROTOCOL;
1110}
1111
1112void ASTDeclWriter::VisitObjCAtDefsFieldDecl(ObjCAtDefsFieldDecl *D) {
1113 VisitFieldDecl(D);
1114 Code = serialization::DECL_OBJC_AT_DEFS_FIELD;
1115}
1116
1117void ASTDeclWriter::VisitObjCCategoryDecl(ObjCCategoryDecl *D) {
1118 VisitObjCContainerDecl(D);
1119 Record.AddSourceLocation(Loc: D->getCategoryNameLoc());
1120 Record.AddSourceLocation(Loc: D->getIvarLBraceLoc());
1121 Record.AddSourceLocation(Loc: D->getIvarRBraceLoc());
1122 Record.AddDeclRef(D: D->getClassInterface());
1123 AddObjCTypeParamList(typeParams: D->TypeParamList);
1124 Record.push_back(N: D->protocol_size());
1125 for (const auto *I : D->protocols())
1126 Record.AddDeclRef(D: I);
1127 for (const auto &PL : D->protocol_locs())
1128 Record.AddSourceLocation(Loc: PL);
1129 Code = serialization::DECL_OBJC_CATEGORY;
1130}
1131
1132void ASTDeclWriter::VisitObjCCompatibleAliasDecl(ObjCCompatibleAliasDecl *D) {
1133 VisitNamedDecl(D);
1134 Record.AddDeclRef(D: D->getClassInterface());
1135 Code = serialization::DECL_OBJC_COMPATIBLE_ALIAS;
1136}
1137
1138void ASTDeclWriter::VisitObjCPropertyDecl(ObjCPropertyDecl *D) {
1139 VisitNamedDecl(D);
1140 Record.AddSourceLocation(Loc: D->getAtLoc());
1141 Record.AddSourceLocation(Loc: D->getLParenLoc());
1142 Record.AddTypeRef(T: D->getType());
1143 Record.AddTypeSourceInfo(TInfo: D->getTypeSourceInfo());
1144 // FIXME: stable encoding
1145 Record.push_back(N: (unsigned)D->getPropertyAttributes());
1146 Record.push_back(N: (unsigned)D->getPropertyAttributesAsWritten());
1147 // FIXME: stable encoding
1148 Record.push_back(N: (unsigned)D->getPropertyImplementation());
1149 Record.AddDeclarationName(Name: D->getGetterName());
1150 Record.AddSourceLocation(Loc: D->getGetterNameLoc());
1151 Record.AddDeclarationName(Name: D->getSetterName());
1152 Record.AddSourceLocation(Loc: D->getSetterNameLoc());
1153 Record.AddDeclRef(D: D->getGetterMethodDecl());
1154 Record.AddDeclRef(D: D->getSetterMethodDecl());
1155 Record.AddDeclRef(D: D->getPropertyIvarDecl());
1156 Code = serialization::DECL_OBJC_PROPERTY;
1157}
1158
1159void ASTDeclWriter::VisitObjCImplDecl(ObjCImplDecl *D) {
1160 VisitObjCContainerDecl(D);
1161 Record.AddDeclRef(D: D->getClassInterface());
1162 // Abstract class (no need to define a stable serialization::DECL code).
1163}
1164
1165void ASTDeclWriter::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D) {
1166 VisitObjCImplDecl(D);
1167 Record.AddSourceLocation(Loc: D->getCategoryNameLoc());
1168 Code = serialization::DECL_OBJC_CATEGORY_IMPL;
1169}
1170
1171void ASTDeclWriter::VisitObjCImplementationDecl(ObjCImplementationDecl *D) {
1172 VisitObjCImplDecl(D);
1173 Record.AddDeclRef(D: D->getSuperClass());
1174 Record.AddSourceLocation(Loc: D->getSuperClassLoc());
1175 Record.AddSourceLocation(Loc: D->getIvarLBraceLoc());
1176 Record.AddSourceLocation(Loc: D->getIvarRBraceLoc());
1177 Record.push_back(N: D->hasNonZeroConstructors());
1178 Record.push_back(N: D->hasDestructors());
1179 Record.push_back(N: D->NumIvarInitializers);
1180 if (D->NumIvarInitializers)
1181 Record.AddCXXCtorInitializers(
1182 CtorInits: llvm::ArrayRef(D->init_begin(), D->init_end()));
1183 Code = serialization::DECL_OBJC_IMPLEMENTATION;
1184}
1185
1186void ASTDeclWriter::VisitObjCPropertyImplDecl(ObjCPropertyImplDecl *D) {
1187 VisitDecl(D);
1188 Record.AddSourceLocation(Loc: D->getBeginLoc());
1189 Record.AddDeclRef(D: D->getPropertyDecl());
1190 Record.AddDeclRef(D: D->getPropertyIvarDecl());
1191 Record.AddSourceLocation(Loc: D->getPropertyIvarDeclLoc());
1192 Record.AddDeclRef(D: D->getGetterMethodDecl());
1193 Record.AddDeclRef(D: D->getSetterMethodDecl());
1194 Record.AddStmt(S: D->getGetterCXXConstructor());
1195 Record.AddStmt(S: D->getSetterCXXAssignment());
1196 Code = serialization::DECL_OBJC_PROPERTY_IMPL;
1197}
1198
1199void ASTDeclWriter::VisitFieldDecl(FieldDecl *D) {
1200 VisitDeclaratorDecl(D);
1201 Record.push_back(N: D->isMutable());
1202
1203 Record.push_back(N: (D->StorageKind << 1) | D->BitField);
1204 if (D->StorageKind == FieldDecl::ISK_CapturedVLAType)
1205 Record.AddTypeRef(T: QualType(D->getCapturedVLAType(), 0));
1206 else if (D->BitField)
1207 Record.AddStmt(S: D->getBitWidth());
1208
1209 if (!D->getDeclName() || D->isPlaceholderVar(LangOpts: Writer.getLangOpts()))
1210 Record.AddDeclRef(
1211 D: Record.getASTContext().getInstantiatedFromUnnamedFieldDecl(Field: D));
1212
1213 if (D->getDeclContext() == D->getLexicalDeclContext() &&
1214 !D->hasAttrs() &&
1215 !D->isImplicit() &&
1216 !D->isUsed(CheckUsedAttr: false) &&
1217 !D->isInvalidDecl() &&
1218 !D->isReferenced() &&
1219 !D->isTopLevelDeclInObjCContainer() &&
1220 !D->isModulePrivate() &&
1221 !D->getBitWidth() &&
1222 !D->hasInClassInitializer() &&
1223 !D->hasCapturedVLAType() &&
1224 !D->hasExtInfo() &&
1225 !ObjCIvarDecl::classofKind(K: D->getKind()) &&
1226 !ObjCAtDefsFieldDecl::classofKind(K: D->getKind()) &&
1227 D->getDeclName())
1228 AbbrevToUse = Writer.getDeclFieldAbbrev();
1229
1230 Code = serialization::DECL_FIELD;
1231}
1232
1233void ASTDeclWriter::VisitMSPropertyDecl(MSPropertyDecl *D) {
1234 VisitDeclaratorDecl(D);
1235 Record.AddIdentifierRef(II: D->getGetterId());
1236 Record.AddIdentifierRef(II: D->getSetterId());
1237 Code = serialization::DECL_MS_PROPERTY;
1238}
1239
1240void ASTDeclWriter::VisitMSGuidDecl(MSGuidDecl *D) {
1241 VisitValueDecl(D);
1242 MSGuidDecl::Parts Parts = D->getParts();
1243 Record.push_back(N: Parts.Part1);
1244 Record.push_back(N: Parts.Part2);
1245 Record.push_back(N: Parts.Part3);
1246 Record.append(begin: std::begin(arr&: Parts.Part4And5), end: std::end(arr&: Parts.Part4And5));
1247 Code = serialization::DECL_MS_GUID;
1248}
1249
1250void ASTDeclWriter::VisitUnnamedGlobalConstantDecl(
1251 UnnamedGlobalConstantDecl *D) {
1252 VisitValueDecl(D);
1253 Record.AddAPValue(Value: D->getValue());
1254 Code = serialization::DECL_UNNAMED_GLOBAL_CONSTANT;
1255}
1256
1257void ASTDeclWriter::VisitTemplateParamObjectDecl(TemplateParamObjectDecl *D) {
1258 VisitValueDecl(D);
1259 Record.AddAPValue(Value: D->getValue());
1260 Code = serialization::DECL_TEMPLATE_PARAM_OBJECT;
1261}
1262
1263void ASTDeclWriter::VisitIndirectFieldDecl(IndirectFieldDecl *D) {
1264 VisitValueDecl(D);
1265 Record.push_back(N: D->getChainingSize());
1266
1267 for (const auto *P : D->chain())
1268 Record.AddDeclRef(D: P);
1269 Code = serialization::DECL_INDIRECTFIELD;
1270}
1271
1272void ASTDeclWriter::VisitVarDecl(VarDecl *D) {
1273 VisitRedeclarable(D);
1274 VisitDeclaratorDecl(D);
1275
1276 // The order matters here. It will be better to put the bit with higher
1277 // probability to be 0 in the end of the bits. See the comments in VisitDecl
1278 // for details.
1279 BitsPacker VarDeclBits;
1280 VarDeclBits.addBits(Value: llvm::to_underlying(E: D->getLinkageInternal()),
1281 /*BitWidth=*/BitsWidth: 3);
1282
1283 bool ModulesCodegen = shouldVarGenerateHereOnly(VD: D);
1284 VarDeclBits.addBit(Value: ModulesCodegen);
1285
1286 VarDeclBits.addBits(Value: D->getStorageClass(), /*BitWidth=*/BitsWidth: 3);
1287 VarDeclBits.addBits(Value: D->getTSCSpec(), /*BitWidth=*/BitsWidth: 2);
1288 VarDeclBits.addBits(Value: D->getInitStyle(), /*BitWidth=*/BitsWidth: 2);
1289 VarDeclBits.addBit(Value: D->isARCPseudoStrong());
1290
1291 bool HasDeducedType = false;
1292 if (!isa<ParmVarDecl>(Val: D)) {
1293 VarDeclBits.addBit(Value: D->isThisDeclarationADemotedDefinition());
1294 VarDeclBits.addBit(Value: D->isExceptionVariable());
1295 VarDeclBits.addBit(Value: D->isNRVOVariable());
1296 VarDeclBits.addBit(Value: D->isCXXForRangeDecl());
1297
1298 VarDeclBits.addBit(Value: D->isInline());
1299 VarDeclBits.addBit(Value: D->isInlineSpecified());
1300 VarDeclBits.addBit(Value: D->isConstexpr());
1301 VarDeclBits.addBit(Value: D->isInitCapture());
1302 VarDeclBits.addBit(Value: D->isPreviousDeclInSameBlockScope());
1303
1304 VarDeclBits.addBit(Value: D->isEscapingByref());
1305 HasDeducedType = D->getType()->getContainedDeducedType();
1306 VarDeclBits.addBit(Value: HasDeducedType);
1307
1308 if (const auto *IPD = dyn_cast<ImplicitParamDecl>(Val: D))
1309 VarDeclBits.addBits(Value: llvm::to_underlying(E: IPD->getParameterKind()),
1310 /*Width=*/BitsWidth: 3);
1311 else
1312 VarDeclBits.addBits(Value: 0, /*Width=*/BitsWidth: 3);
1313
1314 VarDeclBits.addBit(Value: D->isObjCForDecl());
1315 VarDeclBits.addBit(Value: D->isCXXForRangeImplicitVar());
1316 }
1317
1318 Record.push_back(N: VarDeclBits);
1319
1320 if (ModulesCodegen)
1321 Writer.AddDeclRef(D, Record&: Writer.ModularCodegenDecls);
1322
1323 if (D->hasAttr<BlocksAttr>()) {
1324 BlockVarCopyInit Init = Record.getASTContext().getBlockVarCopyInit(VD: D);
1325 Record.AddStmt(S: Init.getCopyExpr());
1326 if (Init.getCopyExpr())
1327 Record.push_back(N: Init.canThrow());
1328 }
1329
1330 enum {
1331 VarNotTemplate = 0, VarTemplate, StaticDataMemberSpecialization
1332 };
1333 if (VarTemplateDecl *TemplD = D->getDescribedVarTemplate()) {
1334 Record.push_back(N: VarTemplate);
1335 Record.AddDeclRef(D: TemplD);
1336 } else if (MemberSpecializationInfo *SpecInfo
1337 = D->getMemberSpecializationInfo()) {
1338 Record.push_back(N: StaticDataMemberSpecialization);
1339 Record.AddDeclRef(D: SpecInfo->getInstantiatedFrom());
1340 Record.push_back(N: SpecInfo->getTemplateSpecializationKind());
1341 Record.AddSourceLocation(Loc: SpecInfo->getPointOfInstantiation());
1342 } else {
1343 Record.push_back(N: VarNotTemplate);
1344 }
1345
1346 if (D->getDeclContext() == D->getLexicalDeclContext() && !D->hasAttrs() &&
1347 !D->isTopLevelDeclInObjCContainer() &&
1348 !needsAnonymousDeclarationNumber(D) &&
1349 D->getDeclName().getNameKind() == DeclarationName::Identifier &&
1350 !D->hasExtInfo() && D->getFirstDecl() == D->getMostRecentDecl() &&
1351 D->getKind() == Decl::Var && !D->isInline() && !D->isConstexpr() &&
1352 !D->isInitCapture() && !D->isPreviousDeclInSameBlockScope() &&
1353 !D->hasInitWithSideEffects() && !D->isEscapingByref() &&
1354 !HasDeducedType && D->getStorageDuration() != SD_Static &&
1355 !D->getDescribedVarTemplate() && !D->getMemberSpecializationInfo() &&
1356 !D->isObjCForDecl() && !isa<ImplicitParamDecl>(Val: D) &&
1357 !D->isEscapingByref())
1358 AbbrevToUse = Writer.getDeclVarAbbrev();
1359
1360 Code = serialization::DECL_VAR;
1361}
1362
1363void ASTDeclWriter::VisitImplicitParamDecl(ImplicitParamDecl *D) {
1364 VisitVarDecl(D);
1365 Code = serialization::DECL_IMPLICIT_PARAM;
1366}
1367
1368void ASTDeclWriter::VisitParmVarDecl(ParmVarDecl *D) {
1369 VisitVarDecl(D);
1370
1371 // See the implementation of `ParmVarDecl::getParameterIndex()`, which may
1372 // exceed the size of the normal bitfield. So it may be better to not pack
1373 // these bits.
1374 Record.push_back(N: D->getFunctionScopeIndex());
1375
1376 BitsPacker ParmVarDeclBits;
1377 ParmVarDeclBits.addBit(Value: D->isObjCMethodParameter());
1378 ParmVarDeclBits.addBits(Value: D->getFunctionScopeDepth(), /*BitsWidth=*/7);
1379 // FIXME: stable encoding
1380 ParmVarDeclBits.addBits(Value: D->getObjCDeclQualifier(), /*BitsWidth=*/7);
1381 ParmVarDeclBits.addBit(Value: D->isKNRPromoted());
1382 ParmVarDeclBits.addBit(Value: D->hasInheritedDefaultArg());
1383 ParmVarDeclBits.addBit(Value: D->hasUninstantiatedDefaultArg());
1384 ParmVarDeclBits.addBit(Value: D->getExplicitObjectParamThisLoc().isValid());
1385 Record.push_back(N: ParmVarDeclBits);
1386
1387 if (D->hasUninstantiatedDefaultArg())
1388 Record.AddStmt(S: D->getUninstantiatedDefaultArg());
1389 if (D->getExplicitObjectParamThisLoc().isValid())
1390 Record.AddSourceLocation(Loc: D->getExplicitObjectParamThisLoc());
1391 Code = serialization::DECL_PARM_VAR;
1392
1393 // If the assumptions about the DECL_PARM_VAR abbrev are true, use it. Here
1394 // we dynamically check for the properties that we optimize for, but don't
1395 // know are true of all PARM_VAR_DECLs.
1396 if (D->getDeclContext() == D->getLexicalDeclContext() && !D->hasAttrs() &&
1397 !D->hasExtInfo() && D->getStorageClass() == 0 && !D->isInvalidDecl() &&
1398 !D->isTopLevelDeclInObjCContainer() &&
1399 D->getInitStyle() == VarDecl::CInit && // Can params have anything else?
1400 D->getInit() == nullptr) // No default expr.
1401 AbbrevToUse = Writer.getDeclParmVarAbbrev();
1402
1403 // Check things we know are true of *every* PARM_VAR_DECL, which is more than
1404 // just us assuming it.
1405 assert(!D->getTSCSpec() && "PARM_VAR_DECL can't use TLS");
1406 assert(!D->isThisDeclarationADemotedDefinition()
1407 && "PARM_VAR_DECL can't be demoted definition.");
1408 assert(D->getAccess() == AS_none && "PARM_VAR_DECL can't be public/private");
1409 assert(!D->isExceptionVariable() && "PARM_VAR_DECL can't be exception var");
1410 assert(D->getPreviousDecl() == nullptr && "PARM_VAR_DECL can't be redecl");
1411 assert(!D->isStaticDataMember() &&
1412 "PARM_VAR_DECL can't be static data member");
1413}
1414
1415void ASTDeclWriter::VisitDecompositionDecl(DecompositionDecl *D) {
1416 // Record the number of bindings first to simplify deserialization.
1417 Record.push_back(N: D->bindings().size());
1418
1419 VisitVarDecl(D);
1420 for (auto *B : D->bindings())
1421 Record.AddDeclRef(D: B);
1422 Code = serialization::DECL_DECOMPOSITION;
1423}
1424
1425void ASTDeclWriter::VisitBindingDecl(BindingDecl *D) {
1426 VisitValueDecl(D);
1427 Record.AddStmt(S: D->getBinding());
1428 Code = serialization::DECL_BINDING;
1429}
1430
1431void ASTDeclWriter::VisitFileScopeAsmDecl(FileScopeAsmDecl *D) {
1432 VisitDecl(D);
1433 Record.AddStmt(S: D->getAsmStringExpr());
1434 Record.AddSourceLocation(Loc: D->getRParenLoc());
1435 Code = serialization::DECL_FILE_SCOPE_ASM;
1436}
1437
1438void ASTDeclWriter::VisitTopLevelStmtDecl(TopLevelStmtDecl *D) {
1439 VisitDecl(D);
1440 Record.AddStmt(S: D->getStmt());
1441 Code = serialization::DECL_TOP_LEVEL_STMT_DECL;
1442}
1443
1444void ASTDeclWriter::VisitEmptyDecl(EmptyDecl *D) {
1445 VisitDecl(D);
1446 Code = serialization::DECL_EMPTY;
1447}
1448
1449void ASTDeclWriter::VisitLifetimeExtendedTemporaryDecl(
1450 LifetimeExtendedTemporaryDecl *D) {
1451 VisitDecl(D);
1452 Record.AddDeclRef(D: D->getExtendingDecl());
1453 Record.AddStmt(S: D->getTemporaryExpr());
1454 Record.push_back(N: static_cast<bool>(D->getValue()));
1455 if (D->getValue())
1456 Record.AddAPValue(Value: *D->getValue());
1457 Record.push_back(N: D->getManglingNumber());
1458 Code = serialization::DECL_LIFETIME_EXTENDED_TEMPORARY;
1459}
1460void ASTDeclWriter::VisitBlockDecl(BlockDecl *D) {
1461 VisitDecl(D);
1462 Record.AddStmt(S: D->getBody());
1463 Record.AddTypeSourceInfo(TInfo: D->getSignatureAsWritten());
1464 Record.push_back(N: D->param_size());
1465 for (ParmVarDecl *P : D->parameters())
1466 Record.AddDeclRef(D: P);
1467 Record.push_back(N: D->isVariadic());
1468 Record.push_back(N: D->blockMissingReturnType());
1469 Record.push_back(N: D->isConversionFromLambda());
1470 Record.push_back(N: D->doesNotEscape());
1471 Record.push_back(N: D->canAvoidCopyToHeap());
1472 Record.push_back(N: D->capturesCXXThis());
1473 Record.push_back(N: D->getNumCaptures());
1474 for (const auto &capture : D->captures()) {
1475 Record.AddDeclRef(D: capture.getVariable());
1476
1477 unsigned flags = 0;
1478 if (capture.isByRef()) flags |= 1;
1479 if (capture.isNested()) flags |= 2;
1480 if (capture.hasCopyExpr()) flags |= 4;
1481 Record.push_back(N: flags);
1482
1483 if (capture.hasCopyExpr()) Record.AddStmt(S: capture.getCopyExpr());
1484 }
1485
1486 Code = serialization::DECL_BLOCK;
1487}
1488
1489void ASTDeclWriter::VisitOutlinedFunctionDecl(OutlinedFunctionDecl *D) {
1490 Record.push_back(N: D->getNumParams());
1491 VisitDecl(D);
1492 for (unsigned I = 0; I < D->getNumParams(); ++I)
1493 Record.AddDeclRef(D: D->getParam(i: I));
1494 Record.push_back(N: D->isNothrow() ? 1 : 0);
1495 Record.AddStmt(S: D->getBody());
1496 Code = serialization::DECL_OUTLINEDFUNCTION;
1497}
1498
1499void ASTDeclWriter::VisitCapturedDecl(CapturedDecl *CD) {
1500 Record.push_back(N: CD->getNumParams());
1501 VisitDecl(D: CD);
1502 Record.push_back(N: CD->getContextParamPosition());
1503 Record.push_back(N: CD->isNothrow() ? 1 : 0);
1504 // Body is stored by VisitCapturedStmt.
1505 for (unsigned I = 0; I < CD->getNumParams(); ++I)
1506 Record.AddDeclRef(D: CD->getParam(i: I));
1507 Code = serialization::DECL_CAPTURED;
1508}
1509
1510void ASTDeclWriter::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
1511 static_assert(DeclContext::NumLinkageSpecDeclBits == 17,
1512 "You need to update the serializer after you change the"
1513 "LinkageSpecDeclBits");
1514
1515 VisitDecl(D);
1516 Record.push_back(N: llvm::to_underlying(E: D->getLanguage()));
1517 Record.AddSourceLocation(Loc: D->getExternLoc());
1518 Record.AddSourceLocation(Loc: D->getRBraceLoc());
1519 Code = serialization::DECL_LINKAGE_SPEC;
1520}
1521
1522void ASTDeclWriter::VisitExportDecl(ExportDecl *D) {
1523 VisitDecl(D);
1524 Record.AddSourceLocation(Loc: D->getRBraceLoc());
1525 Code = serialization::DECL_EXPORT;
1526}
1527
1528void ASTDeclWriter::VisitLabelDecl(LabelDecl *D) {
1529 VisitNamedDecl(D);
1530 Record.AddSourceLocation(Loc: D->getBeginLoc());
1531 Code = serialization::DECL_LABEL;
1532}
1533
1534
1535void ASTDeclWriter::VisitNamespaceDecl(NamespaceDecl *D) {
1536 VisitRedeclarable(D);
1537 VisitNamedDecl(D);
1538
1539 BitsPacker NamespaceDeclBits;
1540 NamespaceDeclBits.addBit(Value: D->isInline());
1541 NamespaceDeclBits.addBit(Value: D->isNested());
1542 Record.push_back(N: NamespaceDeclBits);
1543
1544 Record.AddSourceLocation(Loc: D->getBeginLoc());
1545 Record.AddSourceLocation(Loc: D->getRBraceLoc());
1546
1547 if (D->isFirstDecl())
1548 Record.AddDeclRef(D: D->getAnonymousNamespace());
1549 Code = serialization::DECL_NAMESPACE;
1550
1551 if (Writer.hasChain() && D->isAnonymousNamespace() &&
1552 D == D->getMostRecentDecl()) {
1553 // This is a most recent reopening of the anonymous namespace. If its parent
1554 // is in a previous PCH (or is the TU), mark that parent for update, because
1555 // the original namespace always points to the latest re-opening of its
1556 // anonymous namespace.
1557 Decl *Parent = cast<Decl>(
1558 Val: D->getParent()->getRedeclContext()->getPrimaryContext());
1559 if (Parent->isFromASTFile() || isa<TranslationUnitDecl>(Val: Parent)) {
1560 Writer.DeclUpdates[Parent].push_back(
1561 Elt: ASTWriter::DeclUpdate(DeclUpdateKind::CXXAddedAnonymousNamespace, D));
1562 }
1563 }
1564}
1565
1566void ASTDeclWriter::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
1567 VisitRedeclarable(D);
1568 VisitNamedDecl(D);
1569 Record.AddSourceLocation(Loc: D->getNamespaceLoc());
1570 Record.AddSourceLocation(Loc: D->getTargetNameLoc());
1571 Record.AddNestedNameSpecifierLoc(NNS: D->getQualifierLoc());
1572 Record.AddDeclRef(D: D->getNamespace());
1573 Code = serialization::DECL_NAMESPACE_ALIAS;
1574}
1575
1576void ASTDeclWriter::VisitUsingDecl(UsingDecl *D) {
1577 VisitNamedDecl(D);
1578 Record.AddSourceLocation(Loc: D->getUsingLoc());
1579 Record.AddNestedNameSpecifierLoc(NNS: D->getQualifierLoc());
1580 Record.AddDeclarationNameLoc(DNLoc: D->DNLoc, Name: D->getDeclName());
1581 Record.AddDeclRef(D: D->FirstUsingShadow.getPointer());
1582 Record.push_back(N: D->hasTypename());
1583 Record.AddDeclRef(D: Record.getASTContext().getInstantiatedFromUsingDecl(Inst: D));
1584 Code = serialization::DECL_USING;
1585}
1586
1587void ASTDeclWriter::VisitUsingEnumDecl(UsingEnumDecl *D) {
1588 VisitNamedDecl(D);
1589 Record.AddSourceLocation(Loc: D->getUsingLoc());
1590 Record.AddSourceLocation(Loc: D->getEnumLoc());
1591 Record.AddTypeSourceInfo(TInfo: D->getEnumType());
1592 Record.AddDeclRef(D: D->FirstUsingShadow.getPointer());
1593 Record.AddDeclRef(D: Record.getASTContext().getInstantiatedFromUsingEnumDecl(Inst: D));
1594 Code = serialization::DECL_USING_ENUM;
1595}
1596
1597void ASTDeclWriter::VisitUsingPackDecl(UsingPackDecl *D) {
1598 Record.push_back(N: D->NumExpansions);
1599 VisitNamedDecl(D);
1600 Record.AddDeclRef(D: D->getInstantiatedFromUsingDecl());
1601 for (auto *E : D->expansions())
1602 Record.AddDeclRef(D: E);
1603 Code = serialization::DECL_USING_PACK;
1604}
1605
1606void ASTDeclWriter::VisitUsingShadowDecl(UsingShadowDecl *D) {
1607 VisitRedeclarable(D);
1608 VisitNamedDecl(D);
1609 Record.AddDeclRef(D: D->getTargetDecl());
1610 Record.push_back(N: D->getIdentifierNamespace());
1611 Record.AddDeclRef(D: D->UsingOrNextShadow);
1612 Record.AddDeclRef(
1613 D: Record.getASTContext().getInstantiatedFromUsingShadowDecl(Inst: D));
1614
1615 if (D->getDeclContext() == D->getLexicalDeclContext() &&
1616 D->getFirstDecl() == D->getMostRecentDecl() && !D->hasAttrs() &&
1617 !needsAnonymousDeclarationNumber(D) &&
1618 D->getDeclName().getNameKind() == DeclarationName::Identifier)
1619 AbbrevToUse = Writer.getDeclUsingShadowAbbrev();
1620
1621 Code = serialization::DECL_USING_SHADOW;
1622}
1623
1624void ASTDeclWriter::VisitConstructorUsingShadowDecl(
1625 ConstructorUsingShadowDecl *D) {
1626 VisitUsingShadowDecl(D);
1627 Record.AddDeclRef(D: D->NominatedBaseClassShadowDecl);
1628 Record.AddDeclRef(D: D->ConstructedBaseClassShadowDecl);
1629 Record.push_back(N: D->IsVirtual);
1630 Code = serialization::DECL_CONSTRUCTOR_USING_SHADOW;
1631}
1632
1633void ASTDeclWriter::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
1634 VisitNamedDecl(D);
1635 Record.AddSourceLocation(Loc: D->getUsingLoc());
1636 Record.AddSourceLocation(Loc: D->getNamespaceKeyLocation());
1637 Record.AddNestedNameSpecifierLoc(NNS: D->getQualifierLoc());
1638 Record.AddDeclRef(D: D->getNominatedNamespace());
1639 Record.AddDeclRef(D: dyn_cast<Decl>(Val: D->getCommonAncestor()));
1640 Code = serialization::DECL_USING_DIRECTIVE;
1641}
1642
1643void ASTDeclWriter::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
1644 VisitValueDecl(D);
1645 Record.AddSourceLocation(Loc: D->getUsingLoc());
1646 Record.AddNestedNameSpecifierLoc(NNS: D->getQualifierLoc());
1647 Record.AddDeclarationNameLoc(DNLoc: D->DNLoc, Name: D->getDeclName());
1648 Record.AddSourceLocation(Loc: D->getEllipsisLoc());
1649 Code = serialization::DECL_UNRESOLVED_USING_VALUE;
1650}
1651
1652void ASTDeclWriter::VisitUnresolvedUsingTypenameDecl(
1653 UnresolvedUsingTypenameDecl *D) {
1654 VisitTypeDecl(D);
1655 Record.AddSourceLocation(Loc: D->getTypenameLoc());
1656 Record.AddNestedNameSpecifierLoc(NNS: D->getQualifierLoc());
1657 Record.AddSourceLocation(Loc: D->getEllipsisLoc());
1658 Code = serialization::DECL_UNRESOLVED_USING_TYPENAME;
1659}
1660
1661void ASTDeclWriter::VisitUnresolvedUsingIfExistsDecl(
1662 UnresolvedUsingIfExistsDecl *D) {
1663 VisitNamedDecl(D);
1664 Code = serialization::DECL_UNRESOLVED_USING_IF_EXISTS;
1665}
1666
1667void ASTDeclWriter::VisitCXXRecordDecl(CXXRecordDecl *D) {
1668 VisitRecordDecl(D);
1669
1670 enum {
1671 CXXRecNotTemplate = 0,
1672 CXXRecTemplate,
1673 CXXRecMemberSpecialization,
1674 CXXLambda
1675 };
1676 if (ClassTemplateDecl *TemplD = D->getDescribedClassTemplate()) {
1677 Record.push_back(N: CXXRecTemplate);
1678 Record.AddDeclRef(D: TemplD);
1679 } else if (MemberSpecializationInfo *MSInfo
1680 = D->getMemberSpecializationInfo()) {
1681 Record.push_back(N: CXXRecMemberSpecialization);
1682 Record.AddDeclRef(D: MSInfo->getInstantiatedFrom());
1683 Record.push_back(N: MSInfo->getTemplateSpecializationKind());
1684 Record.AddSourceLocation(Loc: MSInfo->getPointOfInstantiation());
1685 } else if (D->isLambda()) {
1686 // For a lambda, we need some information early for merging.
1687 Record.push_back(N: CXXLambda);
1688 if (auto *Context = D->getLambdaContextDecl()) {
1689 Record.AddDeclRef(D: Context);
1690 Record.push_back(N: D->getLambdaIndexInContext());
1691 } else {
1692 Record.push_back(N: 0);
1693 }
1694 // For lambdas inside template functions, remember the mapping to
1695 // deserialize them together.
1696 if (auto *FD = llvm::dyn_cast_or_null<FunctionDecl>(Val: D->getDeclContext());
1697 FD && isDefinitionInDependentContext(D: FD)) {
1698 Writer.RelatedDeclsMap[Writer.GetDeclRef(D: FD)].push_back(
1699 Elt: Writer.GetDeclRef(D: D->getLambdaCallOperator()));
1700 }
1701 } else {
1702 Record.push_back(N: CXXRecNotTemplate);
1703 }
1704
1705 Record.push_back(N: D->isThisDeclarationADefinition());
1706 if (D->isThisDeclarationADefinition())
1707 Record.AddCXXDefinitionData(D);
1708
1709 if (D->isCompleteDefinition() && D->isInNamedModule())
1710 Writer.AddDeclRef(D, Record&: Writer.ModularCodegenDecls);
1711
1712 // Store (what we currently believe to be) the key function to avoid
1713 // deserializing every method so we can compute it.
1714 //
1715 // FIXME: Avoid adding the key function if the class is defined in
1716 // module purview since in that case the key function is meaningless.
1717 if (D->isCompleteDefinition())
1718 Record.AddDeclRef(D: Record.getASTContext().getCurrentKeyFunction(RD: D));
1719
1720 Code = serialization::DECL_CXX_RECORD;
1721}
1722
1723void ASTDeclWriter::VisitCXXMethodDecl(CXXMethodDecl *D) {
1724 VisitFunctionDecl(D);
1725 if (D->isCanonicalDecl()) {
1726 Record.push_back(N: D->size_overridden_methods());
1727 for (const CXXMethodDecl *MD : D->overridden_methods())
1728 Record.AddDeclRef(D: MD);
1729 } else {
1730 // We only need to record overridden methods once for the canonical decl.
1731 Record.push_back(N: 0);
1732 }
1733
1734 if (D->getDeclContext() == D->getLexicalDeclContext() &&
1735 D->getFirstDecl() == D->getMostRecentDecl() && !D->isInvalidDecl() &&
1736 !D->hasAttrs() && !D->isTopLevelDeclInObjCContainer() &&
1737 D->getDeclName().getNameKind() == DeclarationName::Identifier &&
1738 !D->hasExtInfo() && !D->isExplicitlyDefaulted()) {
1739 if (D->getTemplatedKind() == FunctionDecl::TK_NonTemplate ||
1740 D->getTemplatedKind() == FunctionDecl::TK_FunctionTemplate ||
1741 D->getTemplatedKind() == FunctionDecl::TK_MemberSpecialization ||
1742 D->getTemplatedKind() == FunctionDecl::TK_DependentNonTemplate)
1743 AbbrevToUse = Writer.getDeclCXXMethodAbbrev(Kind: D->getTemplatedKind());
1744 else if (D->getTemplatedKind() ==
1745 FunctionDecl::TK_FunctionTemplateSpecialization) {
1746 FunctionTemplateSpecializationInfo *FTSInfo =
1747 D->getTemplateSpecializationInfo();
1748
1749 if (FTSInfo->TemplateArguments->size() == 1) {
1750 const TemplateArgument &TA = FTSInfo->TemplateArguments->get(Idx: 0);
1751 if (TA.getKind() == TemplateArgument::Type &&
1752 !FTSInfo->TemplateArgumentsAsWritten &&
1753 !FTSInfo->getMemberSpecializationInfo())
1754 AbbrevToUse = Writer.getDeclCXXMethodAbbrev(Kind: D->getTemplatedKind());
1755 }
1756 } else if (D->getTemplatedKind() ==
1757 FunctionDecl::TK_DependentFunctionTemplateSpecialization) {
1758 DependentFunctionTemplateSpecializationInfo *DFTSInfo =
1759 D->getDependentSpecializationInfo();
1760 if (!DFTSInfo->TemplateArgumentsAsWritten)
1761 AbbrevToUse = Writer.getDeclCXXMethodAbbrev(Kind: D->getTemplatedKind());
1762 }
1763 }
1764
1765 Code = serialization::DECL_CXX_METHOD;
1766}
1767
1768void ASTDeclWriter::VisitCXXConstructorDecl(CXXConstructorDecl *D) {
1769 static_assert(DeclContext::NumCXXConstructorDeclBits == 64,
1770 "You need to update the serializer after you change the "
1771 "CXXConstructorDeclBits");
1772
1773 Record.push_back(N: D->getTrailingAllocKind());
1774 addExplicitSpecifier(ES: D->getExplicitSpecifierInternal(), Record);
1775 if (auto Inherited = D->getInheritedConstructor()) {
1776 Record.AddDeclRef(D: Inherited.getShadowDecl());
1777 Record.AddDeclRef(D: Inherited.getConstructor());
1778 }
1779
1780 ArrayRef<CXXDefaultArgExpr *> CtorClosureDefaultArgs =
1781 D->getCtorClosureDefaultArgs();
1782 Record.push_back(N: (unsigned)CtorClosureDefaultArgs.size());
1783 for (CXXDefaultArgExpr *Arg : CtorClosureDefaultArgs)
1784 Record.writeStmtRef(S: Arg);
1785
1786 VisitCXXMethodDecl(D);
1787 Code = serialization::DECL_CXX_CONSTRUCTOR;
1788}
1789
1790void ASTDeclWriter::VisitCXXDestructorDecl(CXXDestructorDecl *D) {
1791 VisitCXXMethodDecl(D);
1792
1793 Record.AddDeclRef(D: D->getOperatorDelete());
1794 if (D->getOperatorDelete())
1795 Record.AddStmt(S: D->getOperatorDeleteThisArg());
1796 Record.AddDeclRef(D: D->getOperatorGlobalDelete());
1797 Record.AddDeclRef(D: D->getArrayOperatorDelete());
1798 Record.AddDeclRef(D: D->getGlobalArrayOperatorDelete());
1799
1800 Code = serialization::DECL_CXX_DESTRUCTOR;
1801}
1802
1803void ASTDeclWriter::VisitCXXConversionDecl(CXXConversionDecl *D) {
1804 addExplicitSpecifier(ES: D->getExplicitSpecifier(), Record);
1805 VisitCXXMethodDecl(D);
1806 Code = serialization::DECL_CXX_CONVERSION;
1807}
1808
1809void ASTDeclWriter::VisitImportDecl(ImportDecl *D) {
1810 VisitDecl(D);
1811 Record.push_back(N: Writer.getSubmoduleID(Mod: D->getImportedModule()));
1812 ArrayRef<SourceLocation> IdentifierLocs = D->getIdentifierLocs();
1813 Record.push_back(N: !IdentifierLocs.empty());
1814 if (IdentifierLocs.empty()) {
1815 Record.AddSourceLocation(Loc: D->getEndLoc());
1816 Record.push_back(N: 1);
1817 } else {
1818 for (unsigned I = 0, N = IdentifierLocs.size(); I != N; ++I)
1819 Record.AddSourceLocation(Loc: IdentifierLocs[I]);
1820 Record.push_back(N: IdentifierLocs.size());
1821 }
1822 // Note: the number of source locations must always be the last element in
1823 // the record.
1824 Code = serialization::DECL_IMPORT;
1825}
1826
1827void ASTDeclWriter::VisitAccessSpecDecl(AccessSpecDecl *D) {
1828 VisitDecl(D);
1829 Record.AddSourceLocation(Loc: D->getColonLoc());
1830 Code = serialization::DECL_ACCESS_SPEC;
1831}
1832
1833void ASTDeclWriter::VisitFriendDecl(FriendDecl *D) {
1834 // Record the number of friend type template parameter lists here
1835 // so as to simplify memory allocation during deserialization.
1836 Record.push_back(N: D->NumTPLists);
1837 VisitDecl(D);
1838 bool hasFriendDecl = isa<NamedDecl *>(Val: D->Friend);
1839 Record.push_back(N: hasFriendDecl);
1840 if (hasFriendDecl)
1841 Record.AddDeclRef(D: D->getFriendDecl());
1842 else
1843 Record.AddTypeSourceInfo(TInfo: D->getFriendType());
1844 for (unsigned i = 0; i < D->NumTPLists; ++i)
1845 Record.AddTemplateParameterList(TemplateParams: D->getFriendTypeTemplateParameterList(N: i));
1846 Record.AddDeclRef(D: D->getNextFriend());
1847 Record.push_back(N: D->UnsupportedFriend);
1848 Record.AddSourceLocation(Loc: D->FriendLoc);
1849 Record.AddSourceLocation(Loc: D->EllipsisLoc);
1850 Code = serialization::DECL_FRIEND;
1851}
1852
1853void ASTDeclWriter::VisitFriendTemplateDecl(FriendTemplateDecl *D) {
1854 VisitDecl(D);
1855 Record.push_back(N: D->getNumTemplateParameters());
1856 for (unsigned i = 0, e = D->getNumTemplateParameters(); i != e; ++i)
1857 Record.AddTemplateParameterList(TemplateParams: D->getTemplateParameterList(i));
1858 Record.push_back(N: D->getFriendDecl() != nullptr);
1859 if (D->getFriendDecl())
1860 Record.AddDeclRef(D: D->getFriendDecl());
1861 else
1862 Record.AddTypeSourceInfo(TInfo: D->getFriendType());
1863 Record.AddSourceLocation(Loc: D->getFriendLoc());
1864 Code = serialization::DECL_FRIEND_TEMPLATE;
1865}
1866
1867void ASTDeclWriter::VisitTemplateDecl(TemplateDecl *D) {
1868 VisitNamedDecl(D);
1869
1870 Record.AddTemplateParameterList(TemplateParams: D->getTemplateParameters());
1871 Record.AddDeclRef(D: D->getTemplatedDecl());
1872}
1873
1874void ASTDeclWriter::VisitConceptDecl(ConceptDecl *D) {
1875 VisitTemplateDecl(D);
1876 Record.AddStmt(S: D->getConstraintExpr());
1877 Code = serialization::DECL_CONCEPT;
1878}
1879
1880void ASTDeclWriter::VisitImplicitConceptSpecializationDecl(
1881 ImplicitConceptSpecializationDecl *D) {
1882 Record.push_back(N: D->getTemplateArguments().size());
1883 VisitDecl(D);
1884 for (const TemplateArgument &Arg : D->getTemplateArguments())
1885 Record.AddTemplateArgument(Arg);
1886 Code = serialization::DECL_IMPLICIT_CONCEPT_SPECIALIZATION;
1887}
1888
1889void ASTDeclWriter::VisitRequiresExprBodyDecl(RequiresExprBodyDecl *D) {
1890 Code = serialization::DECL_REQUIRES_EXPR_BODY;
1891}
1892
1893void ASTDeclWriter::VisitRedeclarableTemplateDecl(RedeclarableTemplateDecl *D) {
1894 VisitRedeclarable(D);
1895
1896 // Emit data to initialize CommonOrPrev before VisitTemplateDecl so that
1897 // getCommonPtr() can be used while this is still initializing.
1898 if (D->isFirstDecl()) {
1899 // This declaration owns the 'common' pointer, so serialize that data now.
1900 Record.AddDeclRef(D: D->getInstantiatedFromMemberTemplate());
1901 if (D->getInstantiatedFromMemberTemplate())
1902 Record.push_back(N: D->isMemberSpecialization());
1903 }
1904
1905 VisitTemplateDecl(D);
1906 Record.push_back(N: D->getIdentifierNamespace());
1907}
1908
1909void ASTDeclWriter::VisitClassTemplateDecl(ClassTemplateDecl *D) {
1910 VisitRedeclarableTemplateDecl(D);
1911
1912 if (D->isFirstDecl())
1913 AddTemplateSpecializations(D);
1914
1915 // Force emitting the corresponding deduction guide in reduced BMI mode.
1916 // Otherwise, the deduction guide may be optimized out incorrectly.
1917 if (Writer.isGeneratingReducedBMI()) {
1918 auto Name =
1919 Record.getASTContext().DeclarationNames.getCXXDeductionGuideName(TD: D);
1920 for (auto *DG : D->getDeclContext()->noload_lookup(Name))
1921 Writer.GetDeclRef(D: DG->getCanonicalDecl());
1922 }
1923
1924 Code = serialization::DECL_CLASS_TEMPLATE;
1925}
1926
1927void ASTDeclWriter::VisitClassTemplateSpecializationDecl(
1928 ClassTemplateSpecializationDecl *D) {
1929 RegisterTemplateSpecialization(Template: D->getSpecializedTemplate(), Specialization: D);
1930
1931 VisitCXXRecordDecl(D);
1932
1933 llvm::PointerUnion<ClassTemplateDecl *,
1934 ClassTemplatePartialSpecializationDecl *> InstFrom
1935 = D->getSpecializedTemplateOrPartial();
1936 if (Decl *InstFromD = InstFrom.dyn_cast<ClassTemplateDecl *>()) {
1937 Record.AddDeclRef(D: InstFromD);
1938 } else {
1939 Record.AddDeclRef(D: cast<ClassTemplatePartialSpecializationDecl *>(Val&: InstFrom));
1940 Record.AddTemplateArgumentList(TemplateArgs: &D->getTemplateInstantiationArgs());
1941 }
1942
1943 Record.AddTemplateArgumentList(TemplateArgs: &D->getTemplateArgs());
1944 Record.AddSourceLocation(Loc: D->getPointOfInstantiation());
1945 Record.push_back(N: D->getSpecializationKind());
1946 Record.push_back(N: D->hasStrictPackMatch());
1947 Record.push_back(N: D->isCanonicalDecl());
1948
1949 if (D->isCanonicalDecl()) {
1950 // When reading, we'll add it to the folding set of the following template.
1951 Record.AddDeclRef(D: D->getSpecializedTemplate()->getCanonicalDecl());
1952 }
1953
1954 bool ExplicitInstantiation =
1955 D->getTemplateSpecializationKind() ==
1956 TSK_ExplicitInstantiationDeclaration ||
1957 D->getTemplateSpecializationKind() == TSK_ExplicitInstantiationDefinition;
1958 Record.push_back(N: ExplicitInstantiation);
1959 if (ExplicitInstantiation) {
1960 Record.AddSourceLocation(Loc: D->getExternKeywordLoc());
1961 Record.AddSourceLocation(Loc: D->getTemplateKeywordLoc());
1962 }
1963
1964 const ASTTemplateArgumentListInfo *ArgsWritten =
1965 D->getTemplateArgsAsWritten();
1966 Record.push_back(N: !!ArgsWritten);
1967 if (ArgsWritten)
1968 Record.AddASTTemplateArgumentListInfo(ASTTemplArgList: ArgsWritten);
1969
1970 // Mention the implicitly generated C++ deduction guide to make sure the
1971 // deduction guide will be rewritten as expected.
1972 //
1973 // FIXME: Would it be more efficient to add a callback register function
1974 // in sema to register the deduction guide?
1975 if (Writer.isWritingStdCXXNamedModules()) {
1976 auto Name =
1977 Record.getASTContext().DeclarationNames.getCXXDeductionGuideName(
1978 TD: D->getSpecializedTemplate());
1979 for (auto *DG : D->getDeclContext()->noload_lookup(Name))
1980 Writer.GetDeclRef(D: DG->getCanonicalDecl());
1981 }
1982
1983 // Ensure associated ExplicitInstantiationDecls survive reduced BMI.
1984 for (auto *EID : Record.getASTContext().getExplicitInstantiationDecls(Spec: D))
1985 Writer.GetDeclRef(D: EID);
1986
1987 Code = serialization::DECL_CLASS_TEMPLATE_SPECIALIZATION;
1988}
1989
1990void ASTDeclWriter::VisitClassTemplatePartialSpecializationDecl(
1991 ClassTemplatePartialSpecializationDecl *D) {
1992 Record.AddTemplateParameterList(TemplateParams: D->getTemplateParameters());
1993
1994 VisitClassTemplateSpecializationDecl(D);
1995
1996 // These are read/set from/to the first declaration.
1997 if (D->getPreviousDecl() == nullptr) {
1998 Record.AddDeclRef(D: D->getInstantiatedFromMember());
1999 Record.push_back(N: D->isMemberSpecialization());
2000 }
2001
2002 Code = serialization::DECL_CLASS_TEMPLATE_PARTIAL_SPECIALIZATION;
2003}
2004
2005void ASTDeclWriter::VisitVarTemplateDecl(VarTemplateDecl *D) {
2006 VisitRedeclarableTemplateDecl(D);
2007
2008 if (D->isFirstDecl())
2009 AddTemplateSpecializations(D);
2010 Code = serialization::DECL_VAR_TEMPLATE;
2011}
2012
2013void ASTDeclWriter::VisitVarTemplateSpecializationDecl(
2014 VarTemplateSpecializationDecl *D) {
2015 RegisterTemplateSpecialization(Template: D->getSpecializedTemplate(), Specialization: D);
2016
2017 llvm::PointerUnion<VarTemplateDecl *, VarTemplatePartialSpecializationDecl *>
2018 InstFrom = D->getSpecializedTemplateOrPartial();
2019 if (Decl *InstFromD = InstFrom.dyn_cast<VarTemplateDecl *>()) {
2020 Record.AddDeclRef(D: InstFromD);
2021 } else {
2022 Record.AddDeclRef(D: cast<VarTemplatePartialSpecializationDecl *>(Val&: InstFrom));
2023 Record.AddTemplateArgumentList(TemplateArgs: &D->getTemplateInstantiationArgs());
2024 }
2025
2026 bool ExplicitInstantiation =
2027 D->getTemplateSpecializationKind() ==
2028 TSK_ExplicitInstantiationDeclaration ||
2029 D->getTemplateSpecializationKind() == TSK_ExplicitInstantiationDefinition;
2030 Record.push_back(N: ExplicitInstantiation);
2031 if (ExplicitInstantiation) {
2032 Record.AddSourceLocation(Loc: D->getExternKeywordLoc());
2033 Record.AddSourceLocation(Loc: D->getTemplateKeywordLoc());
2034 }
2035
2036 const ASTTemplateArgumentListInfo *ArgsWritten =
2037 D->getTemplateArgsAsWritten();
2038 Record.push_back(N: !!ArgsWritten);
2039 if (ArgsWritten)
2040 Record.AddASTTemplateArgumentListInfo(ASTTemplArgList: ArgsWritten);
2041
2042 Record.AddTemplateArgumentList(TemplateArgs: &D->getTemplateArgs());
2043 Record.AddSourceLocation(Loc: D->getPointOfInstantiation());
2044 Record.push_back(N: D->getSpecializationKind());
2045 Record.push_back(N: D->IsCompleteDefinition);
2046
2047 VisitVarDecl(D);
2048
2049 Record.push_back(N: D->isCanonicalDecl());
2050
2051 if (D->isCanonicalDecl()) {
2052 // When reading, we'll add it to the folding set of the following template.
2053 Record.AddDeclRef(D: D->getSpecializedTemplate()->getCanonicalDecl());
2054 }
2055
2056 // Ensure associated ExplicitInstantiationDecls survive reduced BMI.
2057 for (auto *EID : Record.getASTContext().getExplicitInstantiationDecls(Spec: D))
2058 Writer.GetDeclRef(D: EID);
2059
2060 Code = serialization::DECL_VAR_TEMPLATE_SPECIALIZATION;
2061}
2062
2063void ASTDeclWriter::VisitVarTemplatePartialSpecializationDecl(
2064 VarTemplatePartialSpecializationDecl *D) {
2065 Record.AddTemplateParameterList(TemplateParams: D->getTemplateParameters());
2066
2067 VisitVarTemplateSpecializationDecl(D);
2068
2069 // These are read/set from/to the first declaration.
2070 if (D->getPreviousDecl() == nullptr) {
2071 Record.AddDeclRef(D: D->getInstantiatedFromMember());
2072 Record.push_back(N: D->isMemberSpecialization());
2073 }
2074
2075 Code = serialization::DECL_VAR_TEMPLATE_PARTIAL_SPECIALIZATION;
2076}
2077
2078void ASTDeclWriter::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
2079 VisitRedeclarableTemplateDecl(D);
2080
2081 if (D->isFirstDecl())
2082 AddTemplateSpecializations(D);
2083 Code = serialization::DECL_FUNCTION_TEMPLATE;
2084}
2085
2086void ASTDeclWriter::VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D) {
2087 Record.push_back(N: D->hasTypeConstraint());
2088 VisitTypeDecl(D);
2089
2090 Record.push_back(N: D->wasDeclaredWithTypename());
2091
2092 const TypeConstraint *TC = D->getTypeConstraint();
2093 if (D->hasTypeConstraint())
2094 Record.push_back(/*TypeConstraintInitialized=*/N: TC != nullptr);
2095 if (TC) {
2096 auto *CR = TC->getConceptReference();
2097 Record.push_back(N: CR != nullptr);
2098 if (CR)
2099 Record.AddConceptReference(CR);
2100 Record.AddStmt(S: TC->getImmediatelyDeclaredConstraint());
2101 Record.writeUnsignedOrNone(Value: TC->getArgPackSubstIndex());
2102 Record.writeUnsignedOrNone(Value: D->getNumExpansionParameters());
2103 }
2104
2105 bool OwnsDefaultArg = D->hasDefaultArgument() &&
2106 !D->defaultArgumentWasInherited();
2107 Record.push_back(N: OwnsDefaultArg);
2108 if (OwnsDefaultArg)
2109 Record.AddTemplateArgumentLoc(Arg: D->getDefaultArgument());
2110
2111 if (!D->hasTypeConstraint() && !OwnsDefaultArg &&
2112 D->getDeclContext() == D->getLexicalDeclContext() &&
2113 !D->isInvalidDecl() && !D->hasAttrs() &&
2114 !D->isTopLevelDeclInObjCContainer() && !D->isImplicit() &&
2115 D->getDeclName().getNameKind() == DeclarationName::Identifier)
2116 AbbrevToUse = Writer.getDeclTemplateTypeParmAbbrev();
2117
2118 Code = serialization::DECL_TEMPLATE_TYPE_PARM;
2119}
2120
2121void ASTDeclWriter::VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D) {
2122 // For an expanded parameter pack, record the number of expansion types here
2123 // so that it's easier for deserialization to allocate the right amount of
2124 // memory.
2125 Record.push_back(N: D->hasPlaceholderTypeConstraint());
2126 if (D->isExpandedParameterPack())
2127 Record.push_back(N: D->getNumExpansionTypes());
2128
2129 VisitDeclaratorDecl(D);
2130 // TemplateParmPosition.
2131 Record.push_back(N: D->getDepth());
2132 Record.push_back(N: D->getPosition());
2133
2134 if (D->hasPlaceholderTypeConstraint())
2135 Record.AddStmt(S: D->getPlaceholderTypeConstraint());
2136
2137 if (D->isExpandedParameterPack()) {
2138 for (unsigned I = 0, N = D->getNumExpansionTypes(); I != N; ++I) {
2139 Record.AddTypeRef(T: D->getExpansionType(I));
2140 Record.AddTypeSourceInfo(TInfo: D->getExpansionTypeSourceInfo(I));
2141 }
2142
2143 Code = serialization::DECL_EXPANDED_NON_TYPE_TEMPLATE_PARM_PACK;
2144 } else {
2145 // Rest of NonTypeTemplateParmDecl.
2146 Record.push_back(N: D->isParameterPack());
2147 bool OwnsDefaultArg = D->hasDefaultArgument() &&
2148 !D->defaultArgumentWasInherited();
2149 Record.push_back(N: OwnsDefaultArg);
2150 if (OwnsDefaultArg)
2151 Record.AddTemplateArgumentLoc(Arg: D->getDefaultArgument());
2152 Code = serialization::DECL_NON_TYPE_TEMPLATE_PARM;
2153 }
2154}
2155
2156void ASTDeclWriter::VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D) {
2157 // For an expanded parameter pack, record the number of expansion types here
2158 // so that it's easier for deserialization to allocate the right amount of
2159 // memory.
2160 if (D->isExpandedParameterPack())
2161 Record.push_back(N: D->getNumExpansionTemplateParameters());
2162
2163 VisitTemplateDecl(D);
2164 Record.push_back(N: D->templateParameterKind());
2165 Record.push_back(N: D->wasDeclaredWithTypename());
2166 // TemplateParmPosition.
2167 Record.push_back(N: D->getDepth());
2168 Record.push_back(N: D->getPosition());
2169
2170 if (D->isExpandedParameterPack()) {
2171 for (unsigned I = 0, N = D->getNumExpansionTemplateParameters();
2172 I != N; ++I)
2173 Record.AddTemplateParameterList(TemplateParams: D->getExpansionTemplateParameters(I));
2174 Code = serialization::DECL_EXPANDED_TEMPLATE_TEMPLATE_PARM_PACK;
2175 } else {
2176 // Rest of TemplateTemplateParmDecl.
2177 Record.push_back(N: D->isParameterPack());
2178 bool OwnsDefaultArg = D->hasDefaultArgument() &&
2179 !D->defaultArgumentWasInherited();
2180 Record.push_back(N: OwnsDefaultArg);
2181 if (OwnsDefaultArg)
2182 Record.AddTemplateArgumentLoc(Arg: D->getDefaultArgument());
2183 Code = serialization::DECL_TEMPLATE_TEMPLATE_PARM;
2184 }
2185}
2186
2187void ASTDeclWriter::VisitTypeAliasTemplateDecl(TypeAliasTemplateDecl *D) {
2188 VisitRedeclarableTemplateDecl(D);
2189 Code = serialization::DECL_TYPE_ALIAS_TEMPLATE;
2190}
2191
2192void ASTDeclWriter::VisitStaticAssertDecl(StaticAssertDecl *D) {
2193 VisitDecl(D);
2194 Record.AddStmt(S: D->getAssertExpr());
2195 Record.push_back(N: D->isFailed());
2196 Record.AddStmt(S: D->getMessage());
2197 Record.AddSourceLocation(Loc: D->getRParenLoc());
2198 Code = serialization::DECL_STATIC_ASSERT;
2199}
2200
2201void ASTDeclWriter::VisitExplicitInstantiationDecl(
2202 ExplicitInstantiationDecl *D) {
2203 // Trailing-object flags must be the first thing written so the reader can
2204 // allocate the right amount of trailing storage in CreateDeserialized.
2205 unsigned Flags = 0;
2206 if (D->hasTrailingQualifier())
2207 Flags |= ExplicitInstantiationDecl::HasQualifierFlag;
2208 if (D->hasTrailingArgsAsWritten())
2209 Flags |= ExplicitInstantiationDecl::HasArgsAsWrittenFlag;
2210 Record.push_back(N: Flags);
2211
2212 VisitDecl(D);
2213 Record.AddDeclRef(D: D->getSpecialization());
2214 Record.AddSourceLocation(Loc: D->getExternLoc());
2215 Record.AddSourceLocation(Loc: D->getNameLoc());
2216 Record.AddTypeSourceInfo(TInfo: D->getRawTypeSourceInfo());
2217 Record.push_back(N: D->getTemplateSpecializationKind());
2218 // Trailing objects.
2219 if (D->hasTrailingQualifier())
2220 Record.AddNestedNameSpecifierLoc(NNS: D->getQualifierLoc());
2221 if (const auto *Args = D->getTrailingArgsInfo())
2222 Record.AddASTTemplateArgumentListInfo(ASTTemplArgList: Args);
2223 Code = serialization::DECL_EXPLICIT_INSTANTIATION;
2224}
2225
2226void ASTDeclWriter::VisitCXXExpansionStmtDecl(CXXExpansionStmtDecl *D) {
2227 VisitDecl(D);
2228 Record.AddStmt(S: D->getExpansionPattern());
2229 Record.AddStmt(S: D->getInstantiations());
2230 Record.AddDeclRef(D: D->getIndexTemplateParm());
2231 Code = serialization::DECL_EXPANSION_STMT;
2232}
2233
2234/// Emit the DeclContext part of a declaration context decl.
2235void ASTDeclWriter::VisitDeclContext(DeclContext *DC) {
2236 static_assert(DeclContext::NumDeclContextBits == 13,
2237 "You need to update the serializer after you change the "
2238 "DeclContextBits");
2239 LookupBlockOffsets Offsets;
2240
2241 if (Writer.isGeneratingReducedBMI() && isa<NamespaceDecl>(Val: DC) &&
2242 cast<NamespaceDecl>(Val: DC)->isFromExplicitGlobalModule()) {
2243 // In reduced BMI, delay writing lexical and visible block for namespace
2244 // in the global module fragment. See the comments of DelayedNamespace for
2245 // details.
2246 Writer.DelayedNamespace.push_back(Elt: cast<NamespaceDecl>(Val: DC));
2247 } else {
2248 Offsets.LexicalOffset =
2249 Writer.WriteDeclContextLexicalBlock(Context&: Record.getASTContext(), DC);
2250 Writer.WriteDeclContextVisibleBlock(Context&: Record.getASTContext(), DC, Offsets);
2251 }
2252
2253 Record.AddLookupOffsets(Offsets);
2254}
2255
2256const Decl *ASTWriter::getFirstLocalDecl(const Decl *D) {
2257 assert(IsLocalDecl(D) && "expected a local declaration");
2258
2259 const Decl *Canon = D->getCanonicalDecl();
2260 if (IsLocalDecl(D: Canon))
2261 return Canon;
2262
2263 const Decl *&CacheEntry = FirstLocalDeclCache[Canon];
2264 if (CacheEntry)
2265 return CacheEntry;
2266
2267 for (const Decl *Redecl = D; Redecl; Redecl = Redecl->getPreviousDecl())
2268 if (IsLocalDecl(D: Redecl))
2269 D = Redecl;
2270 return CacheEntry = D;
2271}
2272
2273template <typename T>
2274void ASTDeclWriter::VisitRedeclarable(Redeclarable<T> *D) {
2275 T *First = D->getFirstDecl();
2276 T *MostRecent = First->getMostRecentDecl();
2277 T *DAsT = static_cast<T *>(D);
2278 if (MostRecent != First) {
2279 assert(isRedeclarableDeclKind(DAsT->getKind()) &&
2280 "Not considered redeclarable?");
2281
2282 Record.AddDeclRef(D: First);
2283
2284 // Write out a list of local redeclarations of this declaration if it's the
2285 // first local declaration in the chain.
2286 const Decl *FirstLocal = Writer.getFirstLocalDecl(D: DAsT);
2287 if (DAsT == FirstLocal) {
2288 // Emit a list of all imported first declarations so that we can be sure
2289 // that all redeclarations visible to this module are before D in the
2290 // redecl chain.
2291 unsigned I = Record.size();
2292 Record.push_back(N: 0);
2293 if (Writer.Chain)
2294 AddFirstDeclFromEachModule(D: DAsT, /*IncludeLocal*/false);
2295 // This is the number of imported first declarations + 1.
2296 Record[I] = Record.size() - I;
2297
2298 // Collect the set of local redeclarations of this declaration, from
2299 // newest to oldest.
2300 ASTWriter::RecordData LocalRedecls;
2301 ASTRecordWriter LocalRedeclWriter(Record, LocalRedecls);
2302 for (const Decl *Prev = FirstLocal->getMostRecentDecl();
2303 Prev != FirstLocal; Prev = Prev->getPreviousDecl())
2304 if (!Prev->isFromASTFile())
2305 LocalRedeclWriter.AddDeclRef(D: Prev);
2306
2307 // If we have any redecls, write them now as a separate record preceding
2308 // the declaration itself.
2309 if (LocalRedecls.empty())
2310 Record.push_back(N: 0);
2311 else
2312 Record.AddOffset(BitOffset: LocalRedeclWriter.Emit(Code: LOCAL_REDECLARATIONS));
2313 } else {
2314 Record.push_back(N: 0);
2315 Record.AddDeclRef(D: FirstLocal);
2316 }
2317
2318 // Make sure that we serialize both the previous and the most-recent
2319 // declarations, which (transitively) ensures that all declarations in the
2320 // chain get serialized.
2321 //
2322 // FIXME: This is not correct; when we reach an imported declaration we
2323 // won't emit its previous declaration.
2324 (void)Writer.GetDeclRef(D: D->getPreviousDecl());
2325 (void)Writer.GetDeclRef(D: MostRecent);
2326 } else {
2327 // We use the sentinel value 0 to indicate an only declaration.
2328 Record.push_back(N: 0);
2329 }
2330}
2331
2332void ASTDeclWriter::VisitHLSLBufferDecl(HLSLBufferDecl *D) {
2333 VisitNamedDecl(D);
2334 VisitDeclContext(DC: D);
2335 Record.push_back(N: D->isCBuffer());
2336 Record.AddSourceLocation(Loc: D->getLocStart());
2337 Record.AddSourceLocation(Loc: D->getLBraceLoc());
2338 Record.AddSourceLocation(Loc: D->getRBraceLoc());
2339
2340 Code = serialization::DECL_HLSL_BUFFER;
2341}
2342
2343void ASTDeclWriter::VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D) {
2344 Record.writeOMPChildren(Data: D->Data);
2345 VisitDecl(D);
2346 Code = serialization::DECL_OMP_THREADPRIVATE;
2347}
2348
2349void ASTDeclWriter::VisitOMPAllocateDecl(OMPAllocateDecl *D) {
2350 Record.writeOMPChildren(Data: D->Data);
2351 VisitDecl(D);
2352 Code = serialization::DECL_OMP_ALLOCATE;
2353}
2354
2355void ASTDeclWriter::VisitOMPRequiresDecl(OMPRequiresDecl *D) {
2356 Record.writeOMPChildren(Data: D->Data);
2357 VisitDecl(D);
2358 Code = serialization::DECL_OMP_REQUIRES;
2359}
2360
2361void ASTDeclWriter::VisitOMPDeclareReductionDecl(OMPDeclareReductionDecl *D) {
2362 static_assert(DeclContext::NumOMPDeclareReductionDeclBits == 15,
2363 "You need to update the serializer after you change the "
2364 "NumOMPDeclareReductionDeclBits");
2365
2366 VisitValueDecl(D);
2367 Record.AddSourceLocation(Loc: D->getBeginLoc());
2368 Record.AddStmt(S: D->getCombinerIn());
2369 Record.AddStmt(S: D->getCombinerOut());
2370 Record.AddStmt(S: D->getCombiner());
2371 Record.AddStmt(S: D->getInitOrig());
2372 Record.AddStmt(S: D->getInitPriv());
2373 Record.AddStmt(S: D->getInitializer());
2374 Record.push_back(N: llvm::to_underlying(E: D->getInitializerKind()));
2375 Record.AddDeclRef(D: D->getPrevDeclInScope());
2376 Code = serialization::DECL_OMP_DECLARE_REDUCTION;
2377}
2378
2379void ASTDeclWriter::VisitOMPDeclareMapperDecl(OMPDeclareMapperDecl *D) {
2380 Record.writeOMPChildren(Data: D->Data);
2381 VisitValueDecl(D);
2382 Record.AddDeclarationName(Name: D->getVarName());
2383 Record.AddDeclRef(D: D->getPrevDeclInScope());
2384 Code = serialization::DECL_OMP_DECLARE_MAPPER;
2385}
2386
2387void ASTDeclWriter::VisitOMPCapturedExprDecl(OMPCapturedExprDecl *D) {
2388 VisitVarDecl(D);
2389 Code = serialization::DECL_OMP_CAPTUREDEXPR;
2390}
2391
2392void ASTDeclWriter::VisitOpenACCDeclareDecl(OpenACCDeclareDecl *D) {
2393 Record.writeUInt32(Value: D->clauses().size());
2394 VisitDecl(D);
2395 Record.writeEnum(value: D->DirKind);
2396 Record.AddSourceLocation(Loc: D->DirectiveLoc);
2397 Record.AddSourceLocation(Loc: D->EndLoc);
2398 Record.writeOpenACCClauseList(Clauses: D->clauses());
2399 Code = serialization::DECL_OPENACC_DECLARE;
2400}
2401void ASTDeclWriter::VisitOpenACCRoutineDecl(OpenACCRoutineDecl *D) {
2402 Record.writeUInt32(Value: D->clauses().size());
2403 VisitDecl(D);
2404 Record.writeEnum(value: D->DirKind);
2405 Record.AddSourceLocation(Loc: D->DirectiveLoc);
2406 Record.AddSourceLocation(Loc: D->EndLoc);
2407 Record.AddSourceRange(Range: D->ParensLoc);
2408 Record.AddStmt(S: D->FuncRef);
2409 Record.writeOpenACCClauseList(Clauses: D->clauses());
2410 Code = serialization::DECL_OPENACC_ROUTINE;
2411}
2412
2413//===----------------------------------------------------------------------===//
2414// ASTWriter Implementation
2415//===----------------------------------------------------------------------===//
2416
2417namespace {
2418template <FunctionDecl::TemplatedKind Kind>
2419std::shared_ptr<llvm::BitCodeAbbrev>
2420getFunctionDeclAbbrev(serialization::DeclCode Code) {
2421 using namespace llvm;
2422
2423 auto Abv = std::make_shared<BitCodeAbbrev>();
2424 Abv->Add(OpInfo: BitCodeAbbrevOp(Code));
2425 // RedeclarableDecl
2426 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // CanonicalDecl
2427 Abv->Add(OpInfo: BitCodeAbbrevOp(Kind));
2428 if constexpr (Kind == FunctionDecl::TK_NonTemplate) {
2429
2430 } else if constexpr (Kind == FunctionDecl::TK_FunctionTemplate) {
2431 // DescribedFunctionTemplate
2432 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
2433 } else if constexpr (Kind == FunctionDecl::TK_DependentNonTemplate) {
2434 // Instantiated From Decl
2435 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
2436 } else if constexpr (Kind == FunctionDecl::TK_MemberSpecialization) {
2437 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // InstantiatedFrom
2438 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
2439 3)); // TemplateSpecializationKind
2440 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Specialized Location
2441 } else if constexpr (Kind ==
2442 FunctionDecl::TK_FunctionTemplateSpecialization) {
2443 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Template
2444 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
2445 3)); // TemplateSpecializationKind
2446 Abv->Add(OpInfo: BitCodeAbbrevOp(1)); // Template Argument Size
2447 Abv->Add(OpInfo: BitCodeAbbrevOp(TemplateArgument::Type)); // Template Argument Kind
2448 Abv->Add(
2449 OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Template Argument Type
2450 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Is Defaulted
2451 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // TemplateArgumentsAsWritten
2452 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SourceLocation
2453 Abv->Add(OpInfo: BitCodeAbbrevOp(0));
2454 Abv->Add(
2455 OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Canonical Decl of template
2456 } else if constexpr (Kind == FunctionDecl::
2457 TK_DependentFunctionTemplateSpecialization) {
2458 // Candidates of specialization
2459 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
2460 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // TemplateArgumentsAsWritten
2461 } else {
2462 llvm_unreachable("Unknown templated kind?");
2463 }
2464 // Decl
2465 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
2466 8)); // Packed DeclBits: ModuleOwnershipKind,
2467 // isUsed, isReferenced, AccessSpecifier,
2468 // isImplicit
2469 //
2470 // The following bits should be 0:
2471 // HasStandaloneLexicalDC, HasAttrs,
2472 // TopLevelDeclInObjCContainer,
2473 // isInvalidDecl
2474 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
2475 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
2476 // NamedDecl
2477 Abv->Add(OpInfo: BitCodeAbbrevOp(DeclarationName::Identifier)); // NameKind
2478 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Identifier
2479 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // AnonDeclNumber
2480 // ValueDecl
2481 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
2482 // DeclaratorDecl
2483 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // InnerLocStart
2484 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // HasExtInfo
2485 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TSIType
2486 // FunctionDecl
2487 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 11)); // IDNS
2488 Abv->Add(OpInfo: BitCodeAbbrevOp(
2489 BitCodeAbbrevOp::Fixed,
2490 28)); // Packed Function Bits: StorageClass, Inline, InlineSpecified,
2491 // VirtualAsWritten, Pure, HasInheritedProto, HasWrittenProto,
2492 // Deleted, Trivial, TrivialForCall, Defaulted, ExplicitlyDefaulted,
2493 // IsIneligibleOrNotSelected, ImplicitReturnZero, Constexpr,
2494 // UsesSEHTry, SkippedBody, MultiVersion, LateParsed,
2495 // FriendConstraintRefersToEnclosingTemplate, Linkage,
2496 // ShouldSkipCheckingODR
2497 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LocEnd
2498 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // ODRHash
2499 // This Array slurps the rest of the record. Fortunately we want to encode
2500 // (nearly) all the remaining (variable number of) fields in the same way.
2501 //
2502 // This is:
2503 // NumParams and Params[] from FunctionDecl, and
2504 // NumOverriddenMethods, OverriddenMethods[] from CXXMethodDecl.
2505 //
2506 // Add an AbbrevOp for 'size then elements' and use it here.
2507 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
2508 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
2509 return Abv;
2510}
2511
2512template <FunctionDecl::TemplatedKind Kind>
2513std::shared_ptr<llvm::BitCodeAbbrev> getCXXMethodAbbrev() {
2514 return getFunctionDeclAbbrev<Kind>(serialization::DECL_CXX_METHOD);
2515}
2516} // namespace
2517
2518void ASTWriter::WriteDeclAbbrevs() {
2519 using namespace llvm;
2520
2521 std::shared_ptr<BitCodeAbbrev> Abv;
2522
2523 // Abbreviation for DECL_FIELD
2524 Abv = std::make_shared<BitCodeAbbrev>();
2525 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::DECL_FIELD));
2526 // Decl
2527 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
2528 7)); // Packed DeclBits: ModuleOwnershipKind,
2529 // isUsed, isReferenced, AccessSpecifier,
2530 //
2531 // The following bits should be 0:
2532 // isImplicit, HasStandaloneLexicalDC, HasAttrs,
2533 // TopLevelDeclInObjCContainer,
2534 // isInvalidDecl
2535 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
2536 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
2537 // NamedDecl
2538 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // NameKind = Identifier
2539 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
2540 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // AnonDeclNumber
2541 // ValueDecl
2542 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
2543 // DeclaratorDecl
2544 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // InnerStartLoc
2545 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // hasExtInfo
2546 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TSIType
2547 // FieldDecl
2548 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isMutable
2549 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // StorageKind
2550 // Type Source Info
2551 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
2552 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TypeLoc
2553 DeclFieldAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2554
2555 // Abbreviation for DECL_OBJC_IVAR
2556 Abv = std::make_shared<BitCodeAbbrev>();
2557 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::DECL_OBJC_IVAR));
2558 // Decl
2559 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
2560 12)); // Packed DeclBits: HasStandaloneLexicalDC,
2561 // isInvalidDecl, HasAttrs, isImplicit, isUsed,
2562 // isReferenced, TopLevelDeclInObjCContainer,
2563 // AccessSpecifier, ModuleOwnershipKind
2564 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
2565 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
2566 // NamedDecl
2567 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // NameKind = Identifier
2568 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
2569 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // AnonDeclNumber
2570 // ValueDecl
2571 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
2572 // DeclaratorDecl
2573 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // InnerStartLoc
2574 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // hasExtInfo
2575 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TSIType
2576 // FieldDecl
2577 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // isMutable
2578 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // InitStyle
2579 // ObjC Ivar
2580 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // getAccessControl
2581 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // getSynthesize
2582 // Type Source Info
2583 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
2584 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TypeLoc
2585 DeclObjCIvarAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2586
2587 // Abbreviation for DECL_ENUM
2588 Abv = std::make_shared<BitCodeAbbrev>();
2589 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::DECL_ENUM));
2590 // Redeclarable
2591 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // No redeclaration
2592 // Decl
2593 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
2594 7)); // Packed DeclBits: ModuleOwnershipKind,
2595 // isUsed, isReferenced, AccessSpecifier,
2596 //
2597 // The following bits should be 0:
2598 // isImplicit, HasStandaloneLexicalDC, HasAttrs,
2599 // TopLevelDeclInObjCContainer,
2600 // isInvalidDecl
2601 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
2602 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
2603 // NamedDecl
2604 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // NameKind = Identifier
2605 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
2606 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // AnonDeclNumber
2607 // TypeDecl
2608 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Source Location
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 // EnumDecl
2619 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // AddTypeRef
2620 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // IntegerType
2621 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // getPromotionType
2622 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 20)); // Enum Decl Bits
2623 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));// ODRHash
2624 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // InstantiatedMembEnum
2625 // DC
2626 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LexicalOffset
2627 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // VisibleOffset
2628 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // ModuleLocalOffset
2629 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TULocalOffset
2630 DeclEnumAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2631
2632 // Abbreviation for DECL_RECORD
2633 Abv = std::make_shared<BitCodeAbbrev>();
2634 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::DECL_RECORD));
2635 // Redeclarable
2636 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // No redeclaration
2637 // Decl
2638 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
2639 7)); // Packed DeclBits: ModuleOwnershipKind,
2640 // isUsed, isReferenced, AccessSpecifier,
2641 //
2642 // The following bits should be 0:
2643 // isImplicit, HasStandaloneLexicalDC, HasAttrs,
2644 // TopLevelDeclInObjCContainer,
2645 // isInvalidDecl
2646 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
2647 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
2648 // NamedDecl
2649 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // NameKind = Identifier
2650 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
2651 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // AnonDeclNumber
2652 // TypeDecl
2653 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Source Location
2654 // TagDecl
2655 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // IdentifierNamespace
2656 Abv->Add(OpInfo: BitCodeAbbrevOp(
2657 BitCodeAbbrevOp::Fixed,
2658 9)); // Packed Tag Decl Bits: getTagKind, isCompleteDefinition,
2659 // EmbeddedInDeclarator, IsFreeStanding,
2660 // isCompleteDefinitionRequired, ExtInfoKind
2661 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SourceLocation
2662 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SourceLocation
2663 // RecordDecl
2664 Abv->Add(OpInfo: BitCodeAbbrevOp(
2665 BitCodeAbbrevOp::Fixed,
2666 14)); // Packed Record Decl Bits: FlexibleArrayMember,
2667 // AnonymousStructUnion, hasObjectMember, hasVolatileMember,
2668 // isNonTrivialToPrimitiveDefaultInitialize,
2669 // isNonTrivialToPrimitiveCopy, isNonTrivialToPrimitiveDestroy,
2670 // hasNonTrivialToPrimitiveDefaultInitializeCUnion,
2671 // hasNonTrivialToPrimitiveDestructCUnion,
2672 // hasNonTrivialToPrimitiveCopyCUnion,
2673 // hasUninitializedExplicitInitFields, isParamDestroyedInCallee,
2674 // getArgPassingRestrictions
2675 // ODRHash
2676 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 26));
2677
2678 // DC
2679 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LexicalOffset
2680 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // VisibleOffset
2681 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // ModuleLocalOffset
2682 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TULocalOffset
2683 DeclRecordAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2684
2685 // Abbreviation for DECL_PARM_VAR
2686 Abv = std::make_shared<BitCodeAbbrev>();
2687 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::DECL_PARM_VAR));
2688 // Redeclarable
2689 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // No redeclaration
2690 // Decl
2691 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
2692 8)); // Packed DeclBits: ModuleOwnershipKind, isUsed,
2693 // isReferenced, AccessSpecifier,
2694 // HasStandaloneLexicalDC, HasAttrs, isImplicit,
2695 // TopLevelDeclInObjCContainer,
2696 // isInvalidDecl,
2697 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
2698 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
2699 // NamedDecl
2700 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // NameKind = Identifier
2701 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
2702 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // AnonDeclNumber
2703 // ValueDecl
2704 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
2705 // DeclaratorDecl
2706 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // InnerStartLoc
2707 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // hasExtInfo
2708 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TSIType
2709 // VarDecl
2710 Abv->Add(
2711 OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
2712 12)); // Packed Var Decl bits: SClass, TSCSpec, InitStyle,
2713 // isARCPseudoStrong, Linkage, ModulesCodegen
2714 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // VarKind (local enum)
2715 // ParmVarDecl
2716 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // ScopeIndex
2717 Abv->Add(OpInfo: BitCodeAbbrevOp(
2718 BitCodeAbbrevOp::Fixed,
2719 19)); // Packed Parm Var Decl bits: IsObjCMethodParameter, ScopeDepth,
2720 // ObjCDeclQualifier, KNRPromoted,
2721 // HasInheritedDefaultArg, HasUninstantiatedDefaultArg
2722 // Type Source Info
2723 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
2724 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TypeLoc
2725 DeclParmVarAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2726
2727 // Abbreviation for DECL_TYPEDEF
2728 Abv = std::make_shared<BitCodeAbbrev>();
2729 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::DECL_TYPEDEF));
2730 // Redeclarable
2731 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // No redeclaration
2732 // Decl
2733 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
2734 7)); // Packed DeclBits: ModuleOwnershipKind,
2735 // isReferenced, isUsed, AccessSpecifier. Other
2736 // higher bits should be 0: isImplicit,
2737 // HasStandaloneLexicalDC, HasAttrs,
2738 // TopLevelDeclInObjCContainer, isInvalidDecl
2739 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
2740 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
2741 // NamedDecl
2742 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // NameKind = Identifier
2743 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
2744 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // AnonDeclNumber
2745 // TypeDecl
2746 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Source Location
2747 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type Ref
2748 // TypedefDecl
2749 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
2750 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TypeLoc
2751 DeclTypedefAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2752
2753 // Abbreviation for DECL_VAR
2754 Abv = std::make_shared<BitCodeAbbrev>();
2755 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::DECL_VAR));
2756 // Redeclarable
2757 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // No redeclaration
2758 // Decl
2759 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
2760 12)); // Packed DeclBits: HasStandaloneLexicalDC,
2761 // isInvalidDecl, HasAttrs, isImplicit, isUsed,
2762 // isReferenced, TopLevelDeclInObjCContainer,
2763 // AccessSpecifier, ModuleOwnershipKind
2764 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
2765 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
2766 // NamedDecl
2767 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // NameKind = Identifier
2768 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
2769 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // AnonDeclNumber
2770 // ValueDecl
2771 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
2772 // DeclaratorDecl
2773 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // InnerStartLoc
2774 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // hasExtInfo
2775 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TSIType
2776 // VarDecl
2777 Abv->Add(OpInfo: BitCodeAbbrevOp(
2778 BitCodeAbbrevOp::Fixed,
2779 22)); // Packed Var Decl bits: Linkage, ModulesCodegen,
2780 // SClass, TSCSpec, InitStyle,
2781 // isARCPseudoStrong, IsThisDeclarationADemotedDefinition,
2782 // isExceptionVariable, isNRVOVariable, isCXXForRangeDecl,
2783 // isInline, isInlineSpecified, isConstexpr,
2784 // isInitCapture, isPrevDeclInSameScope, hasInitWithSideEffects,
2785 // EscapingByref, HasDeducedType, ImplicitParamKind, isObjCForDecl
2786 // IsCXXForRangeImplicitVar
2787 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // VarKind (local enum)
2788 // Type Source Info
2789 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
2790 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TypeLoc
2791 DeclVarAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2792
2793 // Abbreviation for DECL_CXX_METHOD
2794 DeclCXXMethodAbbrev =
2795 Stream.EmitAbbrev(Abbv: getCXXMethodAbbrev<FunctionDecl::TK_NonTemplate>());
2796 DeclTemplateCXXMethodAbbrev = Stream.EmitAbbrev(
2797 Abbv: getCXXMethodAbbrev<FunctionDecl::TK_FunctionTemplate>());
2798 DeclDependentNonTemplateCXXMethodAbbrev = Stream.EmitAbbrev(
2799 Abbv: getCXXMethodAbbrev<FunctionDecl::TK_DependentNonTemplate>());
2800 DeclMemberSpecializedCXXMethodAbbrev = Stream.EmitAbbrev(
2801 Abbv: getCXXMethodAbbrev<FunctionDecl::TK_MemberSpecialization>());
2802 DeclTemplateSpecializedCXXMethodAbbrev = Stream.EmitAbbrev(
2803 Abbv: getCXXMethodAbbrev<FunctionDecl::TK_FunctionTemplateSpecialization>());
2804 DeclDependentSpecializationCXXMethodAbbrev = Stream.EmitAbbrev(
2805 Abbv: getCXXMethodAbbrev<
2806 FunctionDecl::TK_DependentFunctionTemplateSpecialization>());
2807
2808 // Abbreviation for DECL_TEMPLATE_TYPE_PARM
2809 Abv = std::make_shared<BitCodeAbbrev>();
2810 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::DECL_TEMPLATE_TYPE_PARM));
2811 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // hasTypeConstraint
2812 // Decl
2813 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
2814 7)); // Packed DeclBits: ModuleOwnershipKind,
2815 // isReferenced, isUsed, AccessSpecifier. Other
2816 // higher bits should be 0: isImplicit,
2817 // HasStandaloneLexicalDC, HasAttrs,
2818 // TopLevelDeclInObjCContainer, isInvalidDecl
2819 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
2820 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
2821 // NamedDecl
2822 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // NameKind = Identifier
2823 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
2824 Abv->Add(OpInfo: BitCodeAbbrevOp(0));
2825 // TypeDecl
2826 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Source Location
2827 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type Ref
2828 // TemplateTypeParmDecl
2829 Abv->Add(
2830 OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // wasDeclaredWithTypename
2831 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // OwnsDefaultArg
2832 DeclTemplateTypeParmAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2833
2834 // Abbreviation for DECL_USING_SHADOW
2835 Abv = std::make_shared<BitCodeAbbrev>();
2836 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::DECL_USING_SHADOW));
2837 // Redeclarable
2838 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // No redeclaration
2839 // Decl
2840 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
2841 12)); // Packed DeclBits: HasStandaloneLexicalDC,
2842 // isInvalidDecl, HasAttrs, isImplicit, isUsed,
2843 // isReferenced, TopLevelDeclInObjCContainer,
2844 // AccessSpecifier, ModuleOwnershipKind
2845 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclContext
2846 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // SubmoduleID
2847 // NamedDecl
2848 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // NameKind = Identifier
2849 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Name
2850 Abv->Add(OpInfo: BitCodeAbbrevOp(0));
2851 // UsingShadowDecl
2852 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // TargetDecl
2853 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 11)); // IDNS
2854 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // UsingOrNextShadow
2855 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR,
2856 6)); // InstantiatedFromUsingShadowDecl
2857 DeclUsingShadowAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2858
2859 // Abbreviation for EXPR_DECL_REF
2860 Abv = std::make_shared<BitCodeAbbrev>();
2861 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::EXPR_DECL_REF));
2862 // Stmt
2863 // Expr
2864 // PackingBits: DependenceKind, ValueKind. ObjectKind should be 0.
2865 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7));
2866 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
2867 // DeclRefExpr
2868 // Packing Bits: , HadMultipleCandidates, RefersToEnclosingVariableOrCapture,
2869 // IsImmediateEscalating, NonOdrUseReason.
2870 // GetDeclFound, HasQualifier and ExplicitTemplateArgs should be 0.
2871 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 5));
2872 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // DeclRef
2873 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Location
2874 DeclRefExprAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2875
2876 // Abbreviation for EXPR_INTEGER_LITERAL
2877 Abv = std::make_shared<BitCodeAbbrev>();
2878 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::EXPR_INTEGER_LITERAL));
2879 //Stmt
2880 // Expr
2881 // DependenceKind, ValueKind, ObjectKind
2882 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 10));
2883 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
2884 // Integer Literal
2885 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Location
2886 Abv->Add(OpInfo: BitCodeAbbrevOp(32)); // Bit Width
2887 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Value
2888 IntegerLiteralAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2889
2890 // Abbreviation for EXPR_CHARACTER_LITERAL
2891 Abv = std::make_shared<BitCodeAbbrev>();
2892 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::EXPR_CHARACTER_LITERAL));
2893 //Stmt
2894 // Expr
2895 // DependenceKind, ValueKind, ObjectKind
2896 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 10));
2897 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
2898 // Character Literal
2899 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // getValue
2900 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Location
2901 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3)); // getKind
2902 CharacterLiteralAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2903
2904 // Abbreviation for EXPR_IMPLICIT_CAST
2905 Abv = std::make_shared<BitCodeAbbrev>();
2906 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::EXPR_IMPLICIT_CAST));
2907 // Stmt
2908 // Expr
2909 // Packing Bits: DependenceKind, ValueKind, ObjectKind,
2910 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 10));
2911 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
2912 // CastExpr
2913 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // PathSize
2914 // Packing Bits: CastKind, StoredFPFeatures, isPartOfExplicitCast
2915 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 9));
2916 // ImplicitCastExpr
2917 ExprImplicitCastAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2918
2919 // Abbreviation for EXPR_BINARY_OPERATOR
2920 Abv = std::make_shared<BitCodeAbbrev>();
2921 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::EXPR_BINARY_OPERATOR));
2922 // Stmt
2923 // Expr
2924 // Packing Bits: DependenceKind. ValueKind and ObjectKind should
2925 // be 0 in this case.
2926 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 5));
2927 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
2928 // BinaryOperator
2929 Abv->Add(
2930 OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // OpCode and HasFPFeatures
2931 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Source Location
2932 BinaryOperatorAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2933
2934 // Abbreviation for EXPR_COMPOUND_ASSIGN_OPERATOR
2935 Abv = std::make_shared<BitCodeAbbrev>();
2936 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::EXPR_COMPOUND_ASSIGN_OPERATOR));
2937 // Stmt
2938 // Expr
2939 // Packing Bits: DependenceKind. ValueKind and ObjectKind should
2940 // be 0 in this case.
2941 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 5));
2942 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
2943 // BinaryOperator
2944 // Packing Bits: OpCode. The HasFPFeatures bit should be 0
2945 Abv->Add(
2946 OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // OpCode and HasFPFeatures
2947 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Source Location
2948 // CompoundAssignOperator
2949 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LHSType
2950 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Result Type
2951 CompoundAssignOperatorAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2952
2953 // Abbreviation for EXPR_CALL
2954 Abv = std::make_shared<BitCodeAbbrev>();
2955 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::EXPR_CALL));
2956 // Stmt
2957 // Expr
2958 // Packing Bits: DependenceKind, ValueKind, ObjectKind,
2959 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 10));
2960 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
2961 // CallExpr
2962 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // NumArgs
2963 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // ADLCallKind
2964 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Source Location
2965 CallExprAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2966
2967 // Abbreviation for EXPR_CXX_OPERATOR_CALL
2968 Abv = std::make_shared<BitCodeAbbrev>();
2969 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::EXPR_CXX_OPERATOR_CALL));
2970 // Stmt
2971 // Expr
2972 // Packing Bits: DependenceKind, ValueKind, ObjectKind,
2973 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 10));
2974 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
2975 // CallExpr
2976 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // NumArgs
2977 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // ADLCallKind
2978 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Source Location
2979 // CXXOperatorCallExpr
2980 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Operator Kind
2981 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // IsReversed
2982 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Source Location
2983 CXXOperatorCallExprAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2984
2985 // Abbreviation for EXPR_CXX_MEMBER_CALL
2986 Abv = std::make_shared<BitCodeAbbrev>();
2987 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::EXPR_CXX_MEMBER_CALL));
2988 // Stmt
2989 // Expr
2990 // Packing Bits: DependenceKind, ValueKind, ObjectKind,
2991 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 10));
2992 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
2993 // CallExpr
2994 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // NumArgs
2995 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // ADLCallKind
2996 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Source Location
2997 // CXXMemberCallExpr
2998 CXXMemberCallExprAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
2999
3000 // Abbreviation for STMT_COMPOUND
3001 Abv = std::make_shared<BitCodeAbbrev>();
3002 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::STMT_COMPOUND));
3003 // Stmt
3004 // CompoundStmt
3005 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Num Stmts
3006 Abv->Add(OpInfo: BitCodeAbbrevOp(0)); // hasStoredFPFeatures
3007 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Source Location
3008 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Source Location
3009 CompoundStmtAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
3010
3011 Abv = std::make_shared<BitCodeAbbrev>();
3012 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::DECL_CONTEXT_LEXICAL));
3013 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
3014 DeclContextLexicalAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
3015
3016 Abv = std::make_shared<BitCodeAbbrev>();
3017 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::DECL_CONTEXT_VISIBLE));
3018 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
3019 DeclContextVisibleLookupAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
3020
3021 Abv = std::make_shared<BitCodeAbbrev>();
3022 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::DECL_CONTEXT_MODULE_LOCAL_VISIBLE));
3023 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
3024 DeclModuleLocalVisibleLookupAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
3025
3026 Abv = std::make_shared<BitCodeAbbrev>();
3027 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::DECL_CONTEXT_TU_LOCAL_VISIBLE));
3028 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
3029 DeclTULocalLookupAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
3030
3031 Abv = std::make_shared<BitCodeAbbrev>();
3032 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::DECL_SPECIALIZATIONS));
3033 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
3034 DeclSpecializationsAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
3035
3036 Abv = std::make_shared<BitCodeAbbrev>();
3037 Abv->Add(OpInfo: BitCodeAbbrevOp(serialization::DECL_PARTIAL_SPECIALIZATIONS));
3038 Abv->Add(OpInfo: BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
3039 DeclPartialSpecializationsAbbrev = Stream.EmitAbbrev(Abbv: std::move(Abv));
3040}
3041
3042/// isRequiredDecl - Check if this is a "required" Decl, which must be seen by
3043/// consumers of the AST.
3044///
3045/// Such decls will always be deserialized from the AST file, so we would like
3046/// this to be as restrictive as possible. Currently the predicate is driven by
3047/// code generation requirements, if other clients have a different notion of
3048/// what is "required" then we may have to consider an alternate scheme where
3049/// clients can iterate over the top-level decls and get information on them,
3050/// without necessary deserializing them. We could explicitly require such
3051/// clients to use a separate API call to "realize" the decl. This should be
3052/// relatively painless since they would presumably only do it for top-level
3053/// decls.
3054static bool isRequiredDecl(const Decl *D, ASTContext &Context,
3055 Module *WritingModule) {
3056 // Named modules have different semantics than header modules. Every named
3057 // module units owns a translation unit. So the importer of named modules
3058 // doesn't need to deserilize everything ahead of time.
3059 if (WritingModule && WritingModule->isNamedModule()) {
3060 // The PragmaCommentDecl and PragmaDetectMismatchDecl are MSVC's extension.
3061 // And the behavior of MSVC for such cases will leak this to the module
3062 // users. Given pragma is not a standard thing, the compiler has the space
3063 // to do their own decision. Let's follow MSVC here.
3064 if (isa<PragmaCommentDecl, PragmaDetectMismatchDecl>(Val: D))
3065 return true;
3066 return false;
3067 }
3068
3069 // An ObjCMethodDecl is never considered as "required" because its
3070 // implementation container always is.
3071
3072 // File scoped assembly or obj-c or OMP declare target implementation must be
3073 // seen.
3074 if (isa<FileScopeAsmDecl, TopLevelStmtDecl, ObjCImplDecl>(Val: D))
3075 return true;
3076
3077 if (WritingModule && isPartOfPerModuleInitializer(D)) {
3078 // These declarations are part of the module initializer, and are emitted
3079 // if and when the module is imported, rather than being emitted eagerly.
3080 return false;
3081 }
3082
3083 return Context.DeclMustBeEmitted(D);
3084}
3085
3086void ASTWriter::WriteDecl(ASTContext &Context, Decl *D) {
3087 PrettyDeclStackTraceEntry CrashInfo(Context, D, SourceLocation(),
3088 "serializing");
3089
3090 // Determine the ID for this declaration.
3091 LocalDeclID ID;
3092 assert(!D->isFromASTFile() && "should not be emitting imported decl");
3093 LocalDeclID &IDR = DeclIDs[D];
3094 if (IDR.isInvalid())
3095 IDR = NextDeclID++;
3096
3097 ID = IDR;
3098
3099 assert(ID >= FirstDeclID && "invalid decl ID");
3100
3101 RecordData Record;
3102 ASTDeclWriter W(*this, Context, Record, GeneratingReducedBMI);
3103
3104 // Build a record for this declaration
3105 W.Visit(D);
3106
3107 // Emit this declaration to the bitstream.
3108 uint64_t Offset = W.Emit(D);
3109
3110 // Record the offset for this declaration
3111 SourceLocation Loc = D->getLocation();
3112 SourceLocationEncoding::RawLocEncoding RawLoc =
3113 getRawSourceLocationEncoding(Loc: getAdjustedLocation(Loc));
3114
3115 unsigned Index = ID.getRawValue() - FirstDeclID.getRawValue();
3116 if (DeclOffsets.size() == Index)
3117 DeclOffsets.emplace_back(args&: RawLoc, args&: Offset, args&: DeclTypesBlockStartOffset);
3118 else if (DeclOffsets.size() < Index) {
3119 // FIXME: Can/should this happen?
3120 DeclOffsets.resize(new_size: Index+1);
3121 DeclOffsets[Index].setRawLoc(RawLoc);
3122 DeclOffsets[Index].setBitOffset(Offset, DeclTypesBlockStartOffset);
3123 } else {
3124 llvm_unreachable("declarations should be emitted in ID order");
3125 }
3126
3127 SourceManager &SM = Context.getSourceManager();
3128 if (Loc.isValid() && SM.isLocalSourceLocation(Loc))
3129 associateDeclWithFile(D, ID);
3130
3131 // Note declarations that should be deserialized eagerly so that we can add
3132 // them to a record in the AST file later.
3133 if (isRequiredDecl(D, Context, WritingModule))
3134 AddDeclRef(D, Record&: EagerlyDeserializedDecls);
3135}
3136
3137void ASTRecordWriter::AddFunctionDefinition(const FunctionDecl *FD) {
3138 // Switch case IDs are per function body.
3139 Writer->ClearSwitchCaseIDs();
3140
3141 assert(FD->doesThisDeclarationHaveABody());
3142 bool ModulesCodegen = shouldFunctionGenerateHereOnly(FD);
3143 Record->push_back(Elt: ModulesCodegen);
3144 if (ModulesCodegen)
3145 Writer->AddDeclRef(D: FD, Record&: Writer->ModularCodegenDecls);
3146 if (auto *CD = dyn_cast<CXXConstructorDecl>(Val: FD)) {
3147 Record->push_back(Elt: CD->getNumCtorInitializers());
3148 if (CD->getNumCtorInitializers())
3149 AddCXXCtorInitializers(CtorInits: llvm::ArrayRef(CD->init_begin(), CD->init_end()));
3150 }
3151 AddStmt(S: FD->getBody());
3152}
3153