552   NamedDecl *PrevDecl = LookupSingleName(TUScope, SuperName, SuperLoc,  in ActOnSuperClassOfClassInterface()  local
555   if (!PrevDecl) {  in ActOnSuperClassOfClassInterface()
564       PrevDecl = Corrected.getCorrectionDeclAs<ObjCInterfaceDecl>();  in ActOnSuperClassOfClassInterface()
568   if (declaresSameEntity(PrevDecl, IDecl)) {  in ActOnSuperClassOfClassInterface()
574     dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl);  in ActOnSuperClassOfClassInterface()
583     if (PrevDecl && !SuperClassDecl) {  in ActOnSuperClassOfClassInterface()
587           dyn_cast_or_null<TypedefNameDecl>(PrevDecl)) {  in ActOnSuperClassOfClassInterface()
610         Diag(PrevDecl->getLocation(), diag::note_previous_definition);  in ActOnSuperClassOfClassInterface()
614     if (!isa_and_nonnull<TypedefNameDecl>(PrevDecl)) {  in ActOnSuperClassOfClassInterface()
985   NamedDecl *PrevDecl =  in ActOnStartClassInterface()  local
989   if (PrevDecl && !isa<ObjCInterfaceDecl>(PrevDecl)) {  in ActOnStartClassInterface()
991     Diag(PrevDecl->getLocation(), diag::note_previous_definition);  in ActOnStartClassInterface()
995   ObjCInterfaceDecl* PrevIDecl = dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl);  in ActOnStartClassInterface()
1228   ObjCProtocolDecl *PrevDecl = LookupProtocol(ProtocolName, ProtocolLoc,  in ActOnStartProtocolInterface()  local
1231   if (ObjCProtocolDecl *Def = PrevDecl? PrevDecl->getDefinition() : nullptr) {  in ActOnStartProtocolInterface()
1256     if (PrevDecl) {  in ActOnStartProtocolInterface()
1262               ProtocolName, ProtocolLoc, PrevDecl->getLocation(), PList);  in ActOnStartProtocolInterface()
1268                                      /*PrevDecl=*/PrevDecl);  in ActOnStartProtocolInterface()
1278   if (PrevDecl)  in ActOnStartProtocolInterface()
1279     mergeDeclAttributes(PDecl, PrevDecl);  in ActOnStartProtocolInterface()
1796     ObjCProtocolDecl *PrevDecl = LookupProtocol(Ident, IdentPair.second,  in ActOnForwardProtocolDeclaration()  local
1801                                  PrevDecl);  in ActOnForwardProtocolDeclaration()
1809     if (PrevDecl)  in ActOnForwardProtocolDeclaration()
1810       mergeDeclAttributes(PDecl, PrevDecl);  in ActOnForwardProtocolDeclaration()
1988   NamedDecl *PrevDecl  in ActOnStartClassImplementation()  local
1991   if (PrevDecl && !isa<ObjCInterfaceDecl>(PrevDecl)) {  in ActOnStartClassImplementation()
1993     Diag(PrevDecl->getLocation(), diag::note_previous_definition);  in ActOnStartClassImplementation()
1994   } else if ((IDecl = dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl))) {  in ActOnStartClassImplementation()
2022     PrevDecl = LookupSingleName(TUScope, SuperClassname, SuperClassLoc,  in ActOnStartClassImplementation()
2024     if (PrevDecl && !isa<ObjCInterfaceDecl>(PrevDecl)) {  in ActOnStartClassImplementation()
2027       Diag(PrevDecl->getLocation(), diag::note_previous_definition);  in ActOnStartClassImplementation()
2029       SDecl = dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl);  in ActOnStartClassImplementation()
3068     NamedDecl *PrevDecl  in ActOnForwardClassDeclaration()  local
3071     if (PrevDecl && !isa<ObjCInterfaceDecl>(PrevDecl)) {  in ActOnForwardClassDeclaration()
3079       TypedefNameDecl *TDD = dyn_cast<TypedefNameDecl>(PrevDecl);  in ActOnForwardClassDeclaration()
3082         Diag(PrevDecl->getLocation(), diag::note_previous_definition);  in ActOnForwardClassDeclaration()
3091           Diag(PrevDecl->getLocation(), diag::note_previous_definition);  in ActOnForwardClassDeclaration()
3099       = dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl);  in ActOnForwardClassDeclaration()
4783       NamedDecl *PrevDecl = R.getFoundDecl();  in ActOnMethodDeclaration()  local
4784       if (S->isDeclScope(PrevDecl)) {  in ActOnMethodDeclaration()
4789         Diag(PrevDecl->getLocation(),  in ActOnMethodDeclaration()