547   NamedDecl *PrevDecl = LookupSingleName(TUScope, SuperName, SuperLoc,  in ActOnSuperClassOfClassInterface()  local
550   if (!PrevDecl) {  in ActOnSuperClassOfClassInterface()
560       PrevDecl = Corrected.getCorrectionDeclAs<ObjCInterfaceDecl>();  in ActOnSuperClassOfClassInterface()
564   if (declaresSameEntity(PrevDecl, IDecl)) {  in ActOnSuperClassOfClassInterface()
570     dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl);  in ActOnSuperClassOfClassInterface()
579     if (PrevDecl && !SuperClassDecl) {  in ActOnSuperClassOfClassInterface()
583           dyn_cast_or_null<TypedefNameDecl>(PrevDecl)) {  in ActOnSuperClassOfClassInterface()
606         Diag(PrevDecl->getLocation(), diag::note_previous_definition);  in ActOnSuperClassOfClassInterface()
610     if (!dyn_cast_or_null<TypedefNameDecl>(PrevDecl)) {  in ActOnSuperClassOfClassInterface()
983   NamedDecl *PrevDecl =  in ActOnStartClassInterface()  local
987   if (PrevDecl && !isa<ObjCInterfaceDecl>(PrevDecl)) {  in ActOnStartClassInterface()
989     Diag(PrevDecl->getLocation(), diag::note_previous_definition);  in ActOnStartClassInterface()
993   ObjCInterfaceDecl* PrevIDecl = dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl);  in ActOnStartClassInterface()
1212   ObjCProtocolDecl *PrevDecl = LookupProtocol(ProtocolName, ProtocolLoc,  in ActOnStartProtocolInterface()  local
1215   if (ObjCProtocolDecl *Def = PrevDecl? PrevDecl->getDefinition() : nullptr) {  in ActOnStartProtocolInterface()
1234     if (PrevDecl) {  in ActOnStartProtocolInterface()
1240               ProtocolName, ProtocolLoc, PrevDecl->getLocation(), PList);  in ActOnStartProtocolInterface()
1246                                      /*PrevDecl=*/PrevDecl);  in ActOnStartProtocolInterface()
1256   if (PrevDecl)  in ActOnStartProtocolInterface()
1257     mergeDeclAttributes(PDecl, PrevDecl);  in ActOnStartProtocolInterface()
1770     ObjCProtocolDecl *PrevDecl = LookupProtocol(Ident, IdentPair.second,  in ActOnForwardProtocolDeclaration()  local
1775                                  PrevDecl);  in ActOnForwardProtocolDeclaration()
1783     if (PrevDecl)  in ActOnForwardProtocolDeclaration()
1784       mergeDeclAttributes(PDecl, PrevDecl);  in ActOnForwardProtocolDeclaration()
1957   NamedDecl *PrevDecl  in ActOnStartClassImplementation()  local
1960   if (PrevDecl && !isa<ObjCInterfaceDecl>(PrevDecl)) {  in ActOnStartClassImplementation()
1962     Diag(PrevDecl->getLocation(), diag::note_previous_definition);  in ActOnStartClassImplementation()
1963   } else if ((IDecl = dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl))) {  in ActOnStartClassImplementation()
1990     PrevDecl = LookupSingleName(TUScope, SuperClassname, SuperClassLoc,  in ActOnStartClassImplementation()
1992     if (PrevDecl && !isa<ObjCInterfaceDecl>(PrevDecl)) {  in ActOnStartClassImplementation()
1995       Diag(PrevDecl->getLocation(), diag::note_previous_definition);  in ActOnStartClassImplementation()
1997       SDecl = dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl);  in ActOnStartClassImplementation()
3026     NamedDecl *PrevDecl  in ActOnForwardClassDeclaration()  local
3029     if (PrevDecl && !isa<ObjCInterfaceDecl>(PrevDecl)) {  in ActOnForwardClassDeclaration()
3037       TypedefNameDecl *TDD = dyn_cast<TypedefNameDecl>(PrevDecl);  in ActOnForwardClassDeclaration()
3040         Diag(PrevDecl->getLocation(), diag::note_previous_definition);  in ActOnForwardClassDeclaration()
3049           Diag(PrevDecl->getLocation(), diag::note_previous_definition);  in ActOnForwardClassDeclaration()
3057       = dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl);  in ActOnForwardClassDeclaration()
4585       NamedDecl *PrevDecl = R.getFoundDecl();  in ActOnMethodDeclaration()  local
4586       if (S->isDeclScope(PrevDecl)) {  in ActOnMethodDeclaration()
4591         Diag(PrevDecl->getLocation(),  in ActOnMethodDeclaration()