src/java.base/share/classes/java/util/ServiceLoader.java

rev 51700 : [mq]: 8210347-Combine-subsequent-calls-to-Set-contains-and-Set-add

@@ -936,12 +936,11 @@
 
                     ModuleLayer layer = stack.pop();
                     List<ModuleLayer> parents = layer.parents();
                     for (int i = parents.size() - 1; i >= 0; i--) {
                         ModuleLayer parent = parents.get(i);
-                        if (!visited.contains(parent)) {
-                            visited.add(parent);
+                        if (visited.add(parent)) {
                             stack.push(parent);
                         }
                     }
                     iterator = providers(layer);
                 }