217       NamedDecl *Existing = nullptr;  member in clang::ASTDeclReader::FindExistingResult
225       FindExistingResult(ASTReader &Reader, NamedDecl *New, NamedDecl *Existing,  in FindExistingResult()  argument
228           : Reader(Reader), New(New), Existing(Existing), AddResult(true),  in FindExistingResult()
233           : Reader(Other.Reader), New(Other.New), Existing(Other.Existing),  in FindExistingResult()
247       operator NamedDecl*() const { return Existing; }  in operator NamedDecl*()
250       operator T*() const { return dyn_cast_or_null<T>(Existing); }  in operator T*()
419     void mergeRedeclarable(Redeclarable<T> *D, T *Existing,
427                               RedeclarableTemplateDecl *Existing,
2488   if (auto *Existing = Redecl.getKnownMergeTarget())  in mergeRedeclarable()  local
2490     mergeRedeclarable(D, cast<T>(Existing), Redecl, TemplatePatternID);  in mergeRedeclarable()
2492     if (T *Existing = ExistingRes)  in mergeRedeclarable()  local
2493       mergeRedeclarable(D, Existing, Redecl, TemplatePatternID);  in mergeRedeclarable()
2507                                          RedeclarableTemplateDecl *Existing,  in mergeTemplatePattern()  argument
2510   auto *ExistingPattern = Existing->getTemplatedDecl();  in mergeTemplatePattern()
2549 void ASTDeclReader::mergeRedeclarable(Redeclarable<T> *DBase, T *Existing,  in mergeRedeclarable()  argument
2553   T *ExistingCanon = Existing->getCanonicalDecl();  in mergeRedeclarable()
2619     if (T *Existing = ExistingRes)  in mergeMergeable()  local
2621                                                Existing->getCanonicalDecl());  in mergeMergeable()
3187   if (!AddResult || Existing)  in ~FindExistingResult()
3321     if (auto *Existing = getAnonymousDeclForMerging(  in findExisting()  local
3323       if (isSameEntity(Existing, D))  in findExisting()
3324         return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,  in findExisting()
3354       if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))  in findExisting()  local
3355         if (isSameEntity(Existing, D))  in findExisting()
3356           return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,  in findExisting()
3362       if (NamedDecl *Existing = getDeclForMerging(*I, TypedefNameForLinkage))  in findExisting()  local
3363         if (isSameEntity(Existing, D))  in findExisting()
3364           return FindExistingResult(Reader, D, Existing, AnonymousDeclNumber,  in findExisting()
4077         ObjCCategoryDecl *&Existing = NameCategoryMap[Cat->getDeclName()];  in add()  local
4078         if (Existing &&  in add()
4079             Reader.getOwningModuleFile(Existing)  in add()
4094           Reader.Diag(Existing->getLocation(), diag::note_previous_definition);  in add()
4095         } else if (!Existing) {  in add()
4097           Existing = Cat;  in add()