209       NamedDecl *Existing = nullptr;  member in clang::ASTDeclReader::FindExistingResult
217       FindExistingResult(ASTReader &Reader, NamedDecl *New, NamedDecl *Existing,  in FindExistingResult()  argument
220           : Reader(Reader), New(New), Existing(Existing), AddResult(true),  in FindExistingResult()
225           : Reader(Other.Reader), New(Other.New), Existing(Other.Existing),  in FindExistingResult()
239       operator NamedDecl*() const { return Existing; }  in operator NamedDecl*()
242       operator T*() const { return dyn_cast_or_null<T>(Existing); }  in operator T*()
428     void mergeRedeclarable(Redeclarable<T> *D, T *Existing,
437                               RedeclarableTemplateDecl *Existing,
898   FunctionDecl *Existing = nullptr;  in VisitFunctionDecl()  local
988         Existing = ExistingInfo->getFunction();  in VisitFunctionDecl()
1084   if (Existing)  in VisitFunctionDecl()
1085     mergeRedeclarable(FD, Existing, Redecl);  in VisitFunctionDecl()
1092       auto *Existing = cast_or_null<FunctionDecl>(Redecl.getKnownMergeTarget());  in VisitFunctionDecl()  local
1093       RedeclarableResult NewRedecl(Existing ? F(Existing) : nullptr,  in VisitFunctionDecl()
1526   if (MSGuidDecl *Existing = Reader.getContext().MSGuidDecls.GetOrInsertNode(D))  in VisitMSGuidDecl()  local
1527     Reader.getContext().setPrimaryMergedDecl(D, Existing->getCanonicalDecl());  in VisitMSGuidDecl()
1536   if (UnnamedGlobalConstantDecl *Existing =  in VisitUnnamedGlobalConstantDecl()  local
1538     Reader.getContext().setPrimaryMergedDecl(D, Existing->getCanonicalDecl());  in VisitUnnamedGlobalConstantDecl()
1547   if (TemplateParamObjectDecl *Existing =  in VisitTemplateParamObjectDecl()  local
1549     Reader.getContext().setPrimaryMergedDecl(D, Existing->getCanonicalDecl());  in VisitTemplateParamObjectDecl()
2736   if (auto *Existing = Redecl.getKnownMergeTarget())  in mergeRedeclarable()  local
2738     mergeRedeclarable(D, cast<T>(Existing), Redecl);  in mergeRedeclarable()
2740     if (T *Existing = ExistingRes)  in mergeRedeclarable()  local
2741       mergeRedeclarable(D, Existing, Redecl);  in mergeRedeclarable()
2764                                          RedeclarableTemplateDecl *Existing,  in mergeTemplatePattern()  argument
2767   auto *ExistingPattern = Existing->getTemplatedDecl();  in mergeTemplatePattern()
2806 void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase, T *Existing,  in mergeRedeclarable()  argument
2809   T *ExistingCanon = Existing->getCanonicalDecl();  in mergeRedeclarable()
2891     if (T *Existing = ExistingRes)  in mergeMergeable()  local
2893                                                Existing->getCanonicalDecl());  in mergeMergeable()
3163   if (!AddResult || Existing)  in ~FindExistingResult()
3303     if (auto *Existing = getAnonymousDeclForMerging(  in findExisting()  local
3305       if (C.isSameEntity(Existing, D))  in findExisting()
3306         return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,  in findExisting()
3336       if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))  in findExisting()  local
3337         if (C.isSameEntity(Existing, D))  in findExisting()
3338           return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,  in findExisting()
3344       if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))  in findExisting()  local
3345         if (C.isSameEntity(Existing, D))  in findExisting()
3346           return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,  in findExisting()
4183         ObjCCategoryDecl *&Existing = NameCategoryMap[Cat->getDeclName()];  in add()  local
4184         if (Existing &&  in add()
4185             Reader.getOwningModuleFile(Existing)  in add()
4200           Reader.Diag(Existing->getLocation(), diag::note_previous_definition);  in add()
4201         } else if (!Existing) {  in add()
4203           Existing = Cat;  in add()