[Gardening] getAttribute -> hasAttribute

Author: CodaFi

lib/Sema/TypeCheckDeclObjC.cpp

@@ -1043,8 +1043,7 @@ Optional<ObjCReason> shouldMarkAsObjC(const ValueDecl *VD, bool allowImplicit) {
 
   // Infer @objc for @_dynamicReplacement(for:) when replaced decl is @objc.
   if (isa<AbstractFunctionDecl>(VD) || isa<AbstractStorageDecl>(VD))
-    if (auto *replacementAttr =
-            VD->getAttrs().getAttribute<DynamicReplacementAttr>()) {
+    if (VD->getAttrs().hasAttribute<DynamicReplacementAttr>()) {
       if (auto *replaced = VD->getDynamicallyReplacedDecl()) {
         if (replaced->isObjC())
           return ObjCReason(ObjCReason::ImplicitlyObjC);

lib/Sema/TypeCheckPropertyWrapper.cpp

@@ -461,9 +461,8 @@ AttachedPropertyWrappersRequest::evaluate(Evaluator &evaluator,
     }
 
     // Properties with wrappers must not override another property.
-    if (auto classDecl = dyn_cast<ClassDecl>(dc)) {
-      if (auto overrideAttr = var->getAttrs().getAttribute<OverrideAttr>()) {
     if (isa<ClassDecl>(dc)) {
+      if (var->getAttrs().hasAttribute<OverrideAttr>()) {
         var->diagnose(diag::property_with_wrapper_overrides,
                       var->getFullName())
           .highlight(attr->getRange());