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 (!dyn_cast_or_null<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()
1219   ObjCProtocolDecl *PrevDecl = LookupProtocol(ProtocolName, ProtocolLoc,  in ActOnStartProtocolInterface()  local
1222   if (ObjCProtocolDecl *Def = PrevDecl? PrevDecl->getDefinition() : nullptr) {  in ActOnStartProtocolInterface()
1241     if (PrevDecl) {  in ActOnStartProtocolInterface()
1247               ProtocolName, ProtocolLoc, PrevDecl->getLocation(), PList);  in ActOnStartProtocolInterface()
1253                                      /*PrevDecl=*/PrevDecl);  in ActOnStartProtocolInterface()
1263   if (PrevDecl)  in ActOnStartProtocolInterface()
1264     mergeDeclAttributes(PDecl, PrevDecl);  in ActOnStartProtocolInterface()
1780     ObjCProtocolDecl *PrevDecl = LookupProtocol(Ident, IdentPair.second,  in ActOnForwardProtocolDeclaration()  local
1785                                  PrevDecl);  in ActOnForwardProtocolDeclaration()
1793     if (PrevDecl)  in ActOnForwardProtocolDeclaration()
1794       mergeDeclAttributes(PDecl, PrevDecl);  in ActOnForwardProtocolDeclaration()
1972   NamedDecl *PrevDecl  in ActOnStartClassImplementation()  local
1975   if (PrevDecl && !isa<ObjCInterfaceDecl>(PrevDecl)) {  in ActOnStartClassImplementation()
1977     Diag(PrevDecl->getLocation(), diag::note_previous_definition);  in ActOnStartClassImplementation()
1978   } else if ((IDecl = dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl))) {  in ActOnStartClassImplementation()
2006     PrevDecl = LookupSingleName(TUScope, SuperClassname, SuperClassLoc,  in ActOnStartClassImplementation()
2008     if (PrevDecl && !isa<ObjCInterfaceDecl>(PrevDecl)) {  in ActOnStartClassImplementation()
2011       Diag(PrevDecl->getLocation(), diag::note_previous_definition);  in ActOnStartClassImplementation()
2013       SDecl = dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl);  in ActOnStartClassImplementation()
3054     NamedDecl *PrevDecl  in ActOnForwardClassDeclaration()  local
3057     if (PrevDecl && !isa<ObjCInterfaceDecl>(PrevDecl)) {  in ActOnForwardClassDeclaration()
3065       TypedefNameDecl *TDD = dyn_cast<TypedefNameDecl>(PrevDecl);  in ActOnForwardClassDeclaration()
3068         Diag(PrevDecl->getLocation(), diag::note_previous_definition);  in ActOnForwardClassDeclaration()
3077           Diag(PrevDecl->getLocation(), diag::note_previous_definition);  in ActOnForwardClassDeclaration()
3085       = dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl);  in ActOnForwardClassDeclaration()
4763       NamedDecl *PrevDecl = R.getFoundDecl();  in ActOnMethodDeclaration()  local
4764       if (S->isDeclScope(PrevDecl)) {  in ActOnMethodDeclaration()
4769         Diag(PrevDecl->getLocation(),  in ActOnMethodDeclaration()