475   NamedDecl *PrevDecl = LookupSingleName(TUScope, SuperName, SuperLoc,  in ActOnSuperClassOfClassInterface()  local
478   if (!PrevDecl) {  in ActOnSuperClassOfClassInterface()
488       PrevDecl = Corrected.getCorrectionDeclAs<ObjCInterfaceDecl>();  in ActOnSuperClassOfClassInterface()
492   if (declaresSameEntity(PrevDecl, IDecl)) {  in ActOnSuperClassOfClassInterface()
498     dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl);  in ActOnSuperClassOfClassInterface()
507     if (PrevDecl && !SuperClassDecl) {  in ActOnSuperClassOfClassInterface()
511           dyn_cast_or_null<TypedefNameDecl>(PrevDecl)) {  in ActOnSuperClassOfClassInterface()
534         Diag(PrevDecl->getLocation(), diag::note_previous_definition);  in ActOnSuperClassOfClassInterface()
538     if (!dyn_cast_or_null<TypedefNameDecl>(PrevDecl)) {  in ActOnSuperClassOfClassInterface()
912   NamedDecl *PrevDecl = LookupSingleName(TUScope, ClassName, ClassLoc,  in ActOnStartClassInterface()  local
915   if (PrevDecl && !isa<ObjCInterfaceDecl>(PrevDecl)) {  in ActOnStartClassInterface()
917     Diag(PrevDecl->getLocation(), diag::note_previous_definition);  in ActOnStartClassInterface()
921   ObjCInterfaceDecl* PrevIDecl = dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl);  in ActOnStartClassInterface()
1134   ObjCProtocolDecl *PrevDecl = LookupProtocol(ProtocolName, ProtocolLoc,  in ActOnStartProtocolInterface()  local
1137   if (ObjCProtocolDecl *Def = PrevDecl? PrevDecl->getDefinition() : nullptr) {  in ActOnStartProtocolInterface()
1151     if (PrevDecl) {  in ActOnStartProtocolInterface()
1157               ProtocolName, ProtocolLoc, PrevDecl->getLocation(), PList);  in ActOnStartProtocolInterface()
1163                                      /*PrevDecl=*/PrevDecl);  in ActOnStartProtocolInterface()
1173   if (PrevDecl)  in ActOnStartProtocolInterface()
1174     mergeDeclAttributes(PDecl, PrevDecl);  in ActOnStartProtocolInterface()
1689     ObjCProtocolDecl *PrevDecl = LookupProtocol(Ident, IdentPair.second,  in ActOnForwardProtocolDeclaration()  local
1694                                  PrevDecl);  in ActOnForwardProtocolDeclaration()
1702     if (PrevDecl)  in ActOnForwardProtocolDeclaration()
1703       mergeDeclAttributes(PDecl, PrevDecl);  in ActOnForwardProtocolDeclaration()
1878   NamedDecl *PrevDecl  in ActOnStartClassImplementation()  local
1881   if (PrevDecl && !isa<ObjCInterfaceDecl>(PrevDecl)) {  in ActOnStartClassImplementation()
1883     Diag(PrevDecl->getLocation(), diag::note_previous_definition);  in ActOnStartClassImplementation()
1884   } else if ((IDecl = dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl))) {  in ActOnStartClassImplementation()
1911     PrevDecl = LookupSingleName(TUScope, SuperClassname, SuperClassLoc,  in ActOnStartClassImplementation()
1913     if (PrevDecl && !isa<ObjCInterfaceDecl>(PrevDecl)) {  in ActOnStartClassImplementation()
1916       Diag(PrevDecl->getLocation(), diag::note_previous_definition);  in ActOnStartClassImplementation()
1918       SDecl = dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl);  in ActOnStartClassImplementation()
2955     NamedDecl *PrevDecl  in ActOnForwardClassDeclaration()  local
2958     if (PrevDecl && !isa<ObjCInterfaceDecl>(PrevDecl)) {  in ActOnForwardClassDeclaration()
2966       TypedefNameDecl *TDD = dyn_cast<TypedefNameDecl>(PrevDecl);  in ActOnForwardClassDeclaration()
2969         Diag(PrevDecl->getLocation(), diag::note_previous_definition);  in ActOnForwardClassDeclaration()
2978           Diag(PrevDecl->getLocation(), diag::note_previous_definition);  in ActOnForwardClassDeclaration()
2986       = dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl);  in ActOnForwardClassDeclaration()
4343       NamedDecl *PrevDecl = R.getFoundDecl();  in ActOnMethodDeclaration()  local
4344       if (S->isDeclScope(PrevDecl)) {  in ActOnMethodDeclaration()
4349         Diag(PrevDecl->getLocation(),   in ActOnMethodDeclaration()