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