1 //===-- ODRHash.cpp - Hashing to diagnose ODR failures ----------*- C++ -*-===//
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
7 //===----------------------------------------------------------------------===//
10 /// This file implements the ODRHash class, which calculates a hash based
11 /// on AST nodes, which is stable across different runs.
13 //===----------------------------------------------------------------------===//
15 #include "clang/AST/ODRHash.h"
17 #include "clang/AST/DeclVisitor.h"
18 #include "clang/AST/NestedNameSpecifier.h"
19 #include "clang/AST/StmtVisitor.h"
20 #include "clang/AST/TypeVisitor.h"
22 using namespace clang;
24 void ODRHash::AddStmt(const Stmt *S) {
25 assert(S && "Expecting non-null pointer.");
26 S->ProcessODRHash(ID, *this);
29 void ODRHash::AddIdentifierInfo(const IdentifierInfo *II) {
30 assert(II && "Expecting non-null pointer.");
31 ID.AddString(II->getName());
34 void ODRHash::AddDeclarationName(DeclarationName Name, bool TreatAsDecl) {
36 // Matches the NamedDecl check in AddDecl
39 AddDeclarationNameImpl(Name);
42 // Matches the ClassTemplateSpecializationDecl check in AddDecl
46 void ODRHash::AddDeclarationNameImpl(DeclarationName Name) {
47 // Index all DeclarationName and use index numbers to refer to them.
48 auto Result = DeclNameMap.insert(std::make_pair(Name, DeclNameMap.size()));
49 ID.AddInteger(Result.first->second);
51 // If found in map, the DeclarationName has previously been processed.
55 // First time processing each DeclarationName, also process its details.
56 AddBoolean(Name.isEmpty());
60 auto Kind = Name.getNameKind();
63 case DeclarationName::Identifier:
64 AddIdentifierInfo(Name.getAsIdentifierInfo());
66 case DeclarationName::ObjCZeroArgSelector:
67 case DeclarationName::ObjCOneArgSelector:
68 case DeclarationName::ObjCMultiArgSelector: {
69 Selector S = Name.getObjCSelector();
70 AddBoolean(S.isNull());
71 AddBoolean(S.isKeywordSelector());
72 AddBoolean(S.isUnarySelector());
73 unsigned NumArgs = S.getNumArgs();
74 ID.AddInteger(NumArgs);
75 for (unsigned i = 0; i < NumArgs; ++i) {
76 const IdentifierInfo *II = S.getIdentifierInfoForSlot(i);
79 AddIdentifierInfo(II);
84 case DeclarationName::CXXConstructorName:
85 case DeclarationName::CXXDestructorName:
86 AddQualType(Name.getCXXNameType());
88 case DeclarationName::CXXOperatorName:
89 ID.AddInteger(Name.getCXXOverloadedOperator());
91 case DeclarationName::CXXLiteralOperatorName:
92 AddIdentifierInfo(Name.getCXXLiteralIdentifier());
94 case DeclarationName::CXXConversionFunctionName:
95 AddQualType(Name.getCXXNameType());
97 case DeclarationName::CXXUsingDirective:
99 case DeclarationName::CXXDeductionGuideName: {
100 auto *Template = Name.getCXXDeductionGuideTemplate();
101 AddBoolean(Template);
109 void ODRHash::AddNestedNameSpecifier(const NestedNameSpecifier *NNS) {
110 assert(NNS && "Expecting non-null pointer.");
111 const auto *Prefix = NNS->getPrefix();
114 AddNestedNameSpecifier(Prefix);
116 auto Kind = NNS->getKind();
119 case NestedNameSpecifier::Identifier:
120 AddIdentifierInfo(NNS->getAsIdentifier());
122 case NestedNameSpecifier::Namespace:
123 AddDecl(NNS->getAsNamespace());
125 case NestedNameSpecifier::NamespaceAlias:
126 AddDecl(NNS->getAsNamespaceAlias());
128 case NestedNameSpecifier::TypeSpec:
129 case NestedNameSpecifier::TypeSpecWithTemplate:
130 AddType(NNS->getAsType());
132 case NestedNameSpecifier::Global:
133 case NestedNameSpecifier::Super:
138 void ODRHash::AddTemplateName(TemplateName Name) {
139 auto Kind = Name.getKind();
143 case TemplateName::Template:
144 AddDecl(Name.getAsTemplateDecl());
146 // TODO: Support these cases.
147 case TemplateName::OverloadedTemplate:
148 case TemplateName::AssumedTemplate:
149 case TemplateName::QualifiedTemplate:
150 case TemplateName::DependentTemplate:
151 case TemplateName::SubstTemplateTemplateParm:
152 case TemplateName::SubstTemplateTemplateParmPack:
157 void ODRHash::AddTemplateArgument(TemplateArgument TA) {
158 const auto Kind = TA.getKind();
162 case TemplateArgument::Null:
163 llvm_unreachable("Expected valid TemplateArgument");
164 case TemplateArgument::Type:
165 AddQualType(TA.getAsType());
167 case TemplateArgument::Declaration:
168 AddDecl(TA.getAsDecl());
170 case TemplateArgument::NullPtr:
171 case TemplateArgument::Integral:
173 case TemplateArgument::Template:
174 case TemplateArgument::TemplateExpansion:
175 AddTemplateName(TA.getAsTemplateOrTemplatePattern());
177 case TemplateArgument::Expression:
178 AddStmt(TA.getAsExpr());
180 case TemplateArgument::Pack:
181 ID.AddInteger(TA.pack_size());
182 for (auto SubTA : TA.pack_elements()) {
183 AddTemplateArgument(SubTA);
189 void ODRHash::AddTemplateParameterList(const TemplateParameterList *TPL) {
190 assert(TPL && "Expecting non-null pointer.");
192 ID.AddInteger(TPL->size());
193 for (auto *ND : TPL->asArray()) {
198 void ODRHash::clear() {
204 unsigned ODRHash::CalculateHash() {
205 // Append the bools to the end of the data segment backwards. This allows
206 // for the bools data to be compressed 32 times smaller compared to using
208 const unsigned unsigned_bits = sizeof(unsigned) * CHAR_BIT;
209 const unsigned size = Bools.size();
210 const unsigned remainder = size % unsigned_bits;
211 const unsigned loops = size / unsigned_bits;
212 auto I = Bools.rbegin();
214 for (unsigned i = 0; i < remainder; ++i) {
219 ID.AddInteger(value);
221 for (unsigned i = 0; i < loops; ++i) {
223 for (unsigned j = 0; j < unsigned_bits; ++j) {
228 ID.AddInteger(value);
231 assert(I == Bools.rend());
233 return ID.ComputeHash();
237 // Process a Decl pointer. Add* methods call back into ODRHash while Visit*
238 // methods process the relevant parts of the Decl.
239 class ODRDeclVisitor : public ConstDeclVisitor<ODRDeclVisitor> {
240 typedef ConstDeclVisitor<ODRDeclVisitor> Inherited;
241 llvm::FoldingSetNodeID &ID;
245 ODRDeclVisitor(llvm::FoldingSetNodeID &ID, ODRHash &Hash)
246 : ID(ID), Hash(Hash) {}
248 void AddStmt(const Stmt *S) {
255 void AddIdentifierInfo(const IdentifierInfo *II) {
258 Hash.AddIdentifierInfo(II);
262 void AddQualType(QualType T) {
266 void AddDecl(const Decl *D) {
273 void AddTemplateArgument(TemplateArgument TA) {
274 Hash.AddTemplateArgument(TA);
277 void Visit(const Decl *D) {
278 ID.AddInteger(D->getKind());
282 void VisitNamedDecl(const NamedDecl *D) {
283 Hash.AddDeclarationName(D->getDeclName());
284 Inherited::VisitNamedDecl(D);
287 void VisitValueDecl(const ValueDecl *D) {
288 if (!isa<FunctionDecl>(D)) {
289 AddQualType(D->getType());
291 Inherited::VisitValueDecl(D);
294 void VisitVarDecl(const VarDecl *D) {
295 Hash.AddBoolean(D->isStaticLocal());
296 Hash.AddBoolean(D->isConstexpr());
297 const bool HasInit = D->hasInit();
298 Hash.AddBoolean(HasInit);
300 AddStmt(D->getInit());
302 Inherited::VisitVarDecl(D);
305 void VisitParmVarDecl(const ParmVarDecl *D) {
306 // TODO: Handle default arguments.
307 Inherited::VisitParmVarDecl(D);
310 void VisitAccessSpecDecl(const AccessSpecDecl *D) {
311 ID.AddInteger(D->getAccess());
312 Inherited::VisitAccessSpecDecl(D);
315 void VisitStaticAssertDecl(const StaticAssertDecl *D) {
316 AddStmt(D->getAssertExpr());
317 AddStmt(D->getMessage());
319 Inherited::VisitStaticAssertDecl(D);
322 void VisitFieldDecl(const FieldDecl *D) {
323 const bool IsBitfield = D->isBitField();
324 Hash.AddBoolean(IsBitfield);
327 AddStmt(D->getBitWidth());
330 Hash.AddBoolean(D->isMutable());
331 AddStmt(D->getInClassInitializer());
333 Inherited::VisitFieldDecl(D);
336 void VisitFunctionDecl(const FunctionDecl *D) {
337 // Handled by the ODRHash for FunctionDecl
338 ID.AddInteger(D->getODRHash());
340 Inherited::VisitFunctionDecl(D);
343 void VisitCXXMethodDecl(const CXXMethodDecl *D) {
344 // Handled by the ODRHash for FunctionDecl
346 Inherited::VisitCXXMethodDecl(D);
349 void VisitTypedefNameDecl(const TypedefNameDecl *D) {
350 AddQualType(D->getUnderlyingType());
352 Inherited::VisitTypedefNameDecl(D);
355 void VisitTypedefDecl(const TypedefDecl *D) {
356 Inherited::VisitTypedefDecl(D);
359 void VisitTypeAliasDecl(const TypeAliasDecl *D) {
360 Inherited::VisitTypeAliasDecl(D);
363 void VisitFriendDecl(const FriendDecl *D) {
364 TypeSourceInfo *TSI = D->getFriendType();
365 Hash.AddBoolean(TSI);
367 AddQualType(TSI->getType());
369 AddDecl(D->getFriendDecl());
373 void VisitTemplateTypeParmDecl(const TemplateTypeParmDecl *D) {
374 // Only care about default arguments as part of the definition.
375 const bool hasDefaultArgument =
376 D->hasDefaultArgument() && !D->defaultArgumentWasInherited();
377 Hash.AddBoolean(hasDefaultArgument);
378 if (hasDefaultArgument) {
379 AddTemplateArgument(D->getDefaultArgument());
381 Hash.AddBoolean(D->isParameterPack());
383 const TypeConstraint *TC = D->getTypeConstraint();
384 Hash.AddBoolean(TC != nullptr);
386 AddStmt(TC->getImmediatelyDeclaredConstraint());
388 Inherited::VisitTemplateTypeParmDecl(D);
391 void VisitNonTypeTemplateParmDecl(const NonTypeTemplateParmDecl *D) {
392 // Only care about default arguments as part of the definition.
393 const bool hasDefaultArgument =
394 D->hasDefaultArgument() && !D->defaultArgumentWasInherited();
395 Hash.AddBoolean(hasDefaultArgument);
396 if (hasDefaultArgument) {
397 AddStmt(D->getDefaultArgument());
399 Hash.AddBoolean(D->isParameterPack());
401 Inherited::VisitNonTypeTemplateParmDecl(D);
404 void VisitTemplateTemplateParmDecl(const TemplateTemplateParmDecl *D) {
405 // Only care about default arguments as part of the definition.
406 const bool hasDefaultArgument =
407 D->hasDefaultArgument() && !D->defaultArgumentWasInherited();
408 Hash.AddBoolean(hasDefaultArgument);
409 if (hasDefaultArgument) {
410 AddTemplateArgument(D->getDefaultArgument().getArgument());
412 Hash.AddBoolean(D->isParameterPack());
414 Inherited::VisitTemplateTemplateParmDecl(D);
417 void VisitTemplateDecl(const TemplateDecl *D) {
418 Hash.AddTemplateParameterList(D->getTemplateParameters());
420 Inherited::VisitTemplateDecl(D);
423 void VisitRedeclarableTemplateDecl(const RedeclarableTemplateDecl *D) {
424 Hash.AddBoolean(D->isMemberSpecialization());
425 Inherited::VisitRedeclarableTemplateDecl(D);
428 void VisitFunctionTemplateDecl(const FunctionTemplateDecl *D) {
429 AddDecl(D->getTemplatedDecl());
430 ID.AddInteger(D->getTemplatedDecl()->getODRHash());
431 Inherited::VisitFunctionTemplateDecl(D);
434 void VisitEnumConstantDecl(const EnumConstantDecl *D) {
435 AddStmt(D->getInitExpr());
436 Inherited::VisitEnumConstantDecl(D);
441 // Only allow a small portion of Decl's to be processed. Remove this once
442 // all Decl's can be handled.
443 bool ODRHash::isWhitelistedDecl(const Decl *D, const DeclContext *Parent) {
444 if (D->isImplicit()) return false;
445 if (D->getDeclContext() != Parent) return false;
447 switch (D->getKind()) {
450 case Decl::AccessSpec:
451 case Decl::CXXConstructor:
452 case Decl::CXXDestructor:
453 case Decl::CXXMethod:
454 case Decl::EnumConstant: // Only found in EnumDecl's.
457 case Decl::FunctionTemplate:
458 case Decl::StaticAssert:
459 case Decl::TypeAlias:
466 void ODRHash::AddSubDecl(const Decl *D) {
467 assert(D && "Expecting non-null pointer.");
469 ODRDeclVisitor(ID, *this).Visit(D);
472 void ODRHash::AddCXXRecordDecl(const CXXRecordDecl *Record) {
473 assert(Record && Record->hasDefinition() &&
474 "Expected non-null record to be a definition.");
476 const DeclContext *DC = Record;
478 if (isa<ClassTemplateSpecializationDecl>(DC)) {
481 DC = DC->getParent();
486 // Filter out sub-Decls which will not be processed in order to get an
487 // accurate count of Decl's.
488 llvm::SmallVector<const Decl *, 16> Decls;
489 for (Decl *SubDecl : Record->decls()) {
490 if (isWhitelistedDecl(SubDecl, Record)) {
491 Decls.push_back(SubDecl);
492 if (auto *Function = dyn_cast<FunctionDecl>(SubDecl)) {
493 // Compute/Preload ODRHash into FunctionDecl.
494 Function->getODRHash();
499 ID.AddInteger(Decls.size());
500 for (auto SubDecl : Decls) {
504 const ClassTemplateDecl *TD = Record->getDescribedClassTemplate();
507 AddTemplateParameterList(TD->getTemplateParameters());
510 ID.AddInteger(Record->getNumBases());
511 auto Bases = Record->bases();
512 for (auto Base : Bases) {
513 AddQualType(Base.getType());
514 ID.AddInteger(Base.isVirtual());
515 ID.AddInteger(Base.getAccessSpecifierAsWritten());
519 void ODRHash::AddFunctionDecl(const FunctionDecl *Function,
521 assert(Function && "Expecting non-null pointer.");
523 // Skip functions that are specializations or in specialization context.
524 const DeclContext *DC = Function;
526 if (isa<ClassTemplateSpecializationDecl>(DC)) return;
527 if (auto *F = dyn_cast<FunctionDecl>(DC)) {
528 if (F->isFunctionTemplateSpecialization()) {
529 if (!isa<CXXMethodDecl>(DC)) return;
530 if (DC->getLexicalParent()->isFileContext()) return;
531 // Inline method specializations are the only supported
532 // specialization for now.
535 DC = DC->getParent();
538 ID.AddInteger(Function->getDeclKind());
540 const auto *SpecializationArgs = Function->getTemplateSpecializationArgs();
541 AddBoolean(SpecializationArgs);
542 if (SpecializationArgs) {
543 ID.AddInteger(SpecializationArgs->size());
544 for (const TemplateArgument &TA : SpecializationArgs->asArray()) {
545 AddTemplateArgument(TA);
549 if (const auto *Method = dyn_cast<CXXMethodDecl>(Function)) {
550 AddBoolean(Method->isConst());
551 AddBoolean(Method->isVolatile());
554 ID.AddInteger(Function->getStorageClass());
555 AddBoolean(Function->isInlineSpecified());
556 AddBoolean(Function->isVirtualAsWritten());
557 AddBoolean(Function->isPure());
558 AddBoolean(Function->isDeletedAsWritten());
559 AddBoolean(Function->isExplicitlyDefaulted());
563 AddQualType(Function->getReturnType());
565 ID.AddInteger(Function->param_size());
566 for (auto Param : Function->parameters())
574 const bool HasBody = Function->isThisDeclarationADefinition() &&
575 !Function->isDefaulted() && !Function->isDeleted() &&
576 !Function->isLateTemplateParsed();
582 auto *Body = Function->getBody();
587 // Filter out sub-Decls which will not be processed in order to get an
588 // accurate count of Decl's.
589 llvm::SmallVector<const Decl *, 16> Decls;
590 for (Decl *SubDecl : Function->decls()) {
591 if (isWhitelistedDecl(SubDecl, Function)) {
592 Decls.push_back(SubDecl);
596 ID.AddInteger(Decls.size());
597 for (auto SubDecl : Decls) {
602 void ODRHash::AddEnumDecl(const EnumDecl *Enum) {
604 AddDeclarationName(Enum->getDeclName());
606 AddBoolean(Enum->isScoped());
607 if (Enum->isScoped())
608 AddBoolean(Enum->isScopedUsingClassTag());
610 if (Enum->getIntegerTypeSourceInfo())
611 AddQualType(Enum->getIntegerType());
613 // Filter out sub-Decls which will not be processed in order to get an
614 // accurate count of Decl's.
615 llvm::SmallVector<const Decl *, 16> Decls;
616 for (Decl *SubDecl : Enum->decls()) {
617 if (isWhitelistedDecl(SubDecl, Enum)) {
618 assert(isa<EnumConstantDecl>(SubDecl) && "Unexpected Decl");
619 Decls.push_back(SubDecl);
623 ID.AddInteger(Decls.size());
624 for (auto SubDecl : Decls) {
630 void ODRHash::AddDecl(const Decl *D) {
631 assert(D && "Expecting non-null pointer.");
632 D = D->getCanonicalDecl();
634 const NamedDecl *ND = dyn_cast<NamedDecl>(D);
637 ID.AddInteger(D->getKind());
641 AddDeclarationName(ND->getDeclName());
643 const auto *Specialization =
644 dyn_cast<ClassTemplateSpecializationDecl>(D);
645 AddBoolean(Specialization);
646 if (Specialization) {
647 const TemplateArgumentList &List = Specialization->getTemplateArgs();
648 ID.AddInteger(List.size());
649 for (const TemplateArgument &TA : List.asArray())
650 AddTemplateArgument(TA);
655 // Process a Type pointer. Add* methods call back into ODRHash while Visit*
656 // methods process the relevant parts of the Type.
657 class ODRTypeVisitor : public TypeVisitor<ODRTypeVisitor> {
658 typedef TypeVisitor<ODRTypeVisitor> Inherited;
659 llvm::FoldingSetNodeID &ID;
663 ODRTypeVisitor(llvm::FoldingSetNodeID &ID, ODRHash &Hash)
664 : ID(ID), Hash(Hash) {}
666 void AddStmt(Stmt *S) {
673 void AddDecl(Decl *D) {
680 void AddQualType(QualType T) {
684 void AddType(const Type *T) {
691 void AddNestedNameSpecifier(const NestedNameSpecifier *NNS) {
692 Hash.AddBoolean(NNS);
694 Hash.AddNestedNameSpecifier(NNS);
698 void AddIdentifierInfo(const IdentifierInfo *II) {
701 Hash.AddIdentifierInfo(II);
705 void VisitQualifiers(Qualifiers Quals) {
706 ID.AddInteger(Quals.getAsOpaqueValue());
709 // Return the RecordType if the typedef only strips away a keyword.
710 // Otherwise, return the original type.
711 static const Type *RemoveTypedef(const Type *T) {
712 const auto *TypedefT = dyn_cast<TypedefType>(T);
717 const TypedefNameDecl *D = TypedefT->getDecl();
718 QualType UnderlyingType = D->getUnderlyingType();
720 if (UnderlyingType.hasLocalQualifiers()) {
724 const auto *ElaboratedT = dyn_cast<ElaboratedType>(UnderlyingType);
729 if (ElaboratedT->getQualifier() != nullptr) {
733 QualType NamedType = ElaboratedT->getNamedType();
734 if (NamedType.hasLocalQualifiers()) {
738 const auto *RecordT = dyn_cast<RecordType>(NamedType);
743 const IdentifierInfo *TypedefII = TypedefT->getDecl()->getIdentifier();
744 const IdentifierInfo *RecordII = RecordT->getDecl()->getIdentifier();
745 if (!TypedefII || !RecordII ||
746 TypedefII->getName() != RecordII->getName()) {
753 void Visit(const Type *T) {
754 T = RemoveTypedef(T);
755 ID.AddInteger(T->getTypeClass());
759 void VisitType(const Type *T) {}
761 void VisitAdjustedType(const AdjustedType *T) {
762 QualType Original = T->getOriginalType();
763 QualType Adjusted = T->getAdjustedType();
765 // The original type and pointee type can be the same, as in the case of
766 // function pointers decaying to themselves. Set a bool and only process
767 // the type once, to prevent doubling the work.
768 SplitQualType split = Adjusted.split();
769 if (auto Pointer = dyn_cast<PointerType>(split.Ty)) {
770 if (Pointer->getPointeeType() == Original) {
771 Hash.AddBoolean(true);
772 ID.AddInteger(split.Quals.getAsOpaqueValue());
773 AddQualType(Original);
779 // The original type and pointee type are different, such as in the case
780 // of a array decaying to an element pointer. Set a bool to false and
781 // process both types.
782 Hash.AddBoolean(false);
783 AddQualType(Original);
784 AddQualType(Adjusted);
789 void VisitDecayedType(const DecayedType *T) {
790 // getDecayedType and getPointeeType are derived from getAdjustedType
791 // and don't need to be separately processed.
792 VisitAdjustedType(T);
795 void VisitArrayType(const ArrayType *T) {
796 AddQualType(T->getElementType());
797 ID.AddInteger(T->getSizeModifier());
798 VisitQualifiers(T->getIndexTypeQualifiers());
801 void VisitConstantArrayType(const ConstantArrayType *T) {
802 T->getSize().Profile(ID);
806 void VisitDependentSizedArrayType(const DependentSizedArrayType *T) {
807 AddStmt(T->getSizeExpr());
811 void VisitIncompleteArrayType(const IncompleteArrayType *T) {
815 void VisitVariableArrayType(const VariableArrayType *T) {
816 AddStmt(T->getSizeExpr());
820 void VisitAttributedType(const AttributedType *T) {
821 ID.AddInteger(T->getAttrKind());
822 AddQualType(T->getModifiedType());
823 AddQualType(T->getEquivalentType());
828 void VisitBlockPointerType(const BlockPointerType *T) {
829 AddQualType(T->getPointeeType());
833 void VisitBuiltinType(const BuiltinType *T) {
834 ID.AddInteger(T->getKind());
838 void VisitComplexType(const ComplexType *T) {
839 AddQualType(T->getElementType());
843 void VisitDecltypeType(const DecltypeType *T) {
844 AddStmt(T->getUnderlyingExpr());
845 AddQualType(T->getUnderlyingType());
849 void VisitDependentDecltypeType(const DependentDecltypeType *T) {
850 VisitDecltypeType(T);
853 void VisitDeducedType(const DeducedType *T) {
854 AddQualType(T->getDeducedType());
858 void VisitAutoType(const AutoType *T) {
859 ID.AddInteger((unsigned)T->getKeyword());
860 ID.AddInteger(T->isConstrained());
861 if (T->isConstrained()) {
862 AddDecl(T->getTypeConstraintConcept());
863 ID.AddInteger(T->getNumArgs());
864 for (const auto &TA : T->getTypeConstraintArguments())
865 Hash.AddTemplateArgument(TA);
870 void VisitDeducedTemplateSpecializationType(
871 const DeducedTemplateSpecializationType *T) {
872 Hash.AddTemplateName(T->getTemplateName());
876 void VisitDependentAddressSpaceType(const DependentAddressSpaceType *T) {
877 AddQualType(T->getPointeeType());
878 AddStmt(T->getAddrSpaceExpr());
882 void VisitDependentSizedExtVectorType(const DependentSizedExtVectorType *T) {
883 AddQualType(T->getElementType());
884 AddStmt(T->getSizeExpr());
888 void VisitFunctionType(const FunctionType *T) {
889 AddQualType(T->getReturnType());
890 T->getExtInfo().Profile(ID);
891 Hash.AddBoolean(T->isConst());
892 Hash.AddBoolean(T->isVolatile());
893 Hash.AddBoolean(T->isRestrict());
897 void VisitFunctionNoProtoType(const FunctionNoProtoType *T) {
898 VisitFunctionType(T);
901 void VisitFunctionProtoType(const FunctionProtoType *T) {
902 ID.AddInteger(T->getNumParams());
903 for (auto ParamType : T->getParamTypes())
904 AddQualType(ParamType);
906 VisitFunctionType(T);
909 void VisitInjectedClassNameType(const InjectedClassNameType *T) {
910 AddDecl(T->getDecl());
914 void VisitMemberPointerType(const MemberPointerType *T) {
915 AddQualType(T->getPointeeType());
916 AddType(T->getClass());
920 void VisitObjCObjectPointerType(const ObjCObjectPointerType *T) {
921 AddQualType(T->getPointeeType());
925 void VisitObjCObjectType(const ObjCObjectType *T) {
926 AddDecl(T->getInterface());
928 auto TypeArgs = T->getTypeArgsAsWritten();
929 ID.AddInteger(TypeArgs.size());
930 for (auto Arg : TypeArgs) {
934 auto Protocols = T->getProtocols();
935 ID.AddInteger(Protocols.size());
936 for (auto Protocol : Protocols) {
940 Hash.AddBoolean(T->isKindOfType());
945 void VisitObjCInterfaceType(const ObjCInterfaceType *T) {
946 // This type is handled by the parent type ObjCObjectType.
947 VisitObjCObjectType(T);
950 void VisitObjCTypeParamType(const ObjCTypeParamType *T) {
951 AddDecl(T->getDecl());
952 auto Protocols = T->getProtocols();
953 ID.AddInteger(Protocols.size());
954 for (auto Protocol : Protocols) {
961 void VisitPackExpansionType(const PackExpansionType *T) {
962 AddQualType(T->getPattern());
966 void VisitParenType(const ParenType *T) {
967 AddQualType(T->getInnerType());
971 void VisitPipeType(const PipeType *T) {
972 AddQualType(T->getElementType());
973 Hash.AddBoolean(T->isReadOnly());
977 void VisitPointerType(const PointerType *T) {
978 AddQualType(T->getPointeeType());
982 void VisitReferenceType(const ReferenceType *T) {
983 AddQualType(T->getPointeeTypeAsWritten());
987 void VisitLValueReferenceType(const LValueReferenceType *T) {
988 VisitReferenceType(T);
991 void VisitRValueReferenceType(const RValueReferenceType *T) {
992 VisitReferenceType(T);
996 VisitSubstTemplateTypeParmPackType(const SubstTemplateTypeParmPackType *T) {
997 AddType(T->getReplacedParameter());
998 Hash.AddTemplateArgument(T->getArgumentPack());
1002 void VisitSubstTemplateTypeParmType(const SubstTemplateTypeParmType *T) {
1003 AddType(T->getReplacedParameter());
1004 AddQualType(T->getReplacementType());
1008 void VisitTagType(const TagType *T) {
1009 AddDecl(T->getDecl());
1013 void VisitRecordType(const RecordType *T) { VisitTagType(T); }
1014 void VisitEnumType(const EnumType *T) { VisitTagType(T); }
1016 void VisitTemplateSpecializationType(const TemplateSpecializationType *T) {
1017 ID.AddInteger(T->getNumArgs());
1018 for (const auto &TA : T->template_arguments()) {
1019 Hash.AddTemplateArgument(TA);
1021 Hash.AddTemplateName(T->getTemplateName());
1025 void VisitTemplateTypeParmType(const TemplateTypeParmType *T) {
1026 ID.AddInteger(T->getDepth());
1027 ID.AddInteger(T->getIndex());
1028 Hash.AddBoolean(T->isParameterPack());
1029 AddDecl(T->getDecl());
1032 void VisitTypedefType(const TypedefType *T) {
1033 AddDecl(T->getDecl());
1034 QualType UnderlyingType = T->getDecl()->getUnderlyingType();
1035 VisitQualifiers(UnderlyingType.getQualifiers());
1037 if (const TypedefType *Underlying =
1038 dyn_cast<TypedefType>(UnderlyingType.getTypePtr())) {
1039 UnderlyingType = Underlying->getDecl()->getUnderlyingType();
1042 if (const ElaboratedType *Underlying =
1043 dyn_cast<ElaboratedType>(UnderlyingType.getTypePtr())) {
1044 UnderlyingType = Underlying->getNamedType();
1050 AddType(UnderlyingType.getTypePtr());
1054 void VisitTypeOfExprType(const TypeOfExprType *T) {
1055 AddStmt(T->getUnderlyingExpr());
1056 Hash.AddBoolean(T->isSugared());
1058 AddQualType(T->desugar());
1062 void VisitTypeOfType(const TypeOfType *T) {
1063 AddQualType(T->getUnderlyingType());
1067 void VisitTypeWithKeyword(const TypeWithKeyword *T) {
1068 ID.AddInteger(T->getKeyword());
1072 void VisitDependentNameType(const DependentNameType *T) {
1073 AddNestedNameSpecifier(T->getQualifier());
1074 AddIdentifierInfo(T->getIdentifier());
1075 VisitTypeWithKeyword(T);
1078 void VisitDependentTemplateSpecializationType(
1079 const DependentTemplateSpecializationType *T) {
1080 AddIdentifierInfo(T->getIdentifier());
1081 AddNestedNameSpecifier(T->getQualifier());
1082 ID.AddInteger(T->getNumArgs());
1083 for (const auto &TA : T->template_arguments()) {
1084 Hash.AddTemplateArgument(TA);
1086 VisitTypeWithKeyword(T);
1089 void VisitElaboratedType(const ElaboratedType *T) {
1090 AddNestedNameSpecifier(T->getQualifier());
1091 AddQualType(T->getNamedType());
1092 VisitTypeWithKeyword(T);
1095 void VisitUnaryTransformType(const UnaryTransformType *T) {
1096 AddQualType(T->getUnderlyingType());
1097 AddQualType(T->getBaseType());
1101 void VisitUnresolvedUsingType(const UnresolvedUsingType *T) {
1102 AddDecl(T->getDecl());
1106 void VisitVectorType(const VectorType *T) {
1107 AddQualType(T->getElementType());
1108 ID.AddInteger(T->getNumElements());
1109 ID.AddInteger(T->getVectorKind());
1113 void VisitExtVectorType(const ExtVectorType * T) {
1119 void ODRHash::AddType(const Type *T) {
1120 assert(T && "Expecting non-null pointer.");
1121 ODRTypeVisitor(ID, *this).Visit(T);
1124 void ODRHash::AddQualType(QualType T) {
1125 AddBoolean(T.isNull());
1128 SplitQualType split = T.split();
1129 ID.AddInteger(split.Quals.getAsOpaqueValue());
1133 void ODRHash::AddBoolean(bool Value) {
1134 Bools.push_back(Value);