7165     NamedDecl *PrevDecl = nullptr;  in ActOnStartNamespaceDef()  local
7170         PrevDecl = *I;  in ActOnStartNamespaceDef()
7175     PrevNS = dyn_cast_or_null<NamespaceDecl>(PrevDecl);  in ActOnStartNamespaceDef()
7182     } else if (PrevDecl) {  in ActOnStartNamespaceDef()
7186       Diag(PrevDecl->getLocation(), diag::note_previous_definition);  in ActOnStartNamespaceDef()
7835                                             UsingShadowDecl *PrevDecl) {  in BuildUsingShadowDecl()  argument
7853   Shadow->setPreviousDecl(PrevDecl);  in BuildUsingShadowDecl()
8207     UsingShadowDecl *PrevDecl = nullptr;  in BuildUsingDeclaration()  local
8208     if (!CheckUsingShadowDecl(UD, *I, Previous, PrevDecl))  in BuildUsingDeclaration()
8209       BuildUsingShadowDecl(S, UD, *I, PrevDecl);  in BuildUsingDeclaration()
8657   NamedDecl *PrevDecl = LookupSingleName(S, Alias, AliasLoc, LookupOrdinaryName,  in ActOnNamespaceAliasDef()  local
8659   if (PrevDecl && !isDeclInScope(PrevDecl, CurContext, S))  in ActOnNamespaceAliasDef()
8660     PrevDecl = nullptr;  in ActOnNamespaceAliasDef()
8664   if (PrevDecl) {  in ActOnNamespaceAliasDef()
8665     if (NamespaceAliasDecl *AD = dyn_cast<NamespaceAliasDecl>(PrevDecl)) {  in ActOnNamespaceAliasDef()
8671         Diag(PrevDecl->getLocation(), diag::note_previous_namespace_alias)  in ActOnNamespaceAliasDef()
8676       unsigned DiagID = isa<NamespaceDecl>(PrevDecl)  in ActOnNamespaceAliasDef()
8680       Diag(PrevDecl->getLocation(), diag::note_previous_definition);  in ActOnNamespaceAliasDef()
8692   if (PrevDecl)  in ActOnNamespaceAliasDef()
8693     AliasDecl->setPreviousDecl(cast<NamespaceAliasDecl>(PrevDecl));  in ActOnNamespaceAliasDef()
12043   if (NamedDecl *PrevDecl = LookupSingleName(S, II, D.getIdentifierLoc(),  in ActOnExceptionDeclarator()  local
12049     assert(!S->isDeclScope(PrevDecl));  in ActOnExceptionDeclarator()
12050     if (isDeclInScope(PrevDecl, CurContext, S)) {  in ActOnExceptionDeclarator()
12053       Diag(PrevDecl->getLocation(), diag::note_previous_definition);  in ActOnExceptionDeclarator()
12055     } else if (PrevDecl->isTemplateParameter())  in ActOnExceptionDeclarator()
12057       DiagnoseTemplateParameterShadow(D.getIdentifierLoc(), PrevDecl);  in ActOnExceptionDeclarator()
13697   NamedDecl *PrevDecl = nullptr;  in HandleMSProperty()  local
13703     PrevDecl = Previous.getAsSingle<NamedDecl>();  in HandleMSProperty()
13707     PrevDecl = Previous.getRepresentativeDecl();  in HandleMSProperty()
13716   if (PrevDecl && PrevDecl->isTemplateParameter()) {  in HandleMSProperty()
13718     DiagnoseTemplateParameterShadow(D.getIdentifierLoc(), PrevDecl);  in HandleMSProperty()
13720     PrevDecl = nullptr;  in HandleMSProperty()
13723   if (PrevDecl && !isDeclInScope(PrevDecl, Record, S))  in HandleMSProperty()
13724     PrevDecl = nullptr;  in HandleMSProperty()
13739   if (NewPD->isInvalidDecl() && PrevDecl) {  in HandleMSProperty()