src/hotspot/share/ci/ciInstanceKlass.hpp

*** 246,255 ****
--- 246,261 ----
    // but consider adding to vmSymbols.hpp instead.
  
    bool is_leaf_type();
    ciInstanceKlass* implementor();
  
+   ciInstanceKlass* unique_implementor() {
+     assert(is_loaded(), "must be loaded");
+     ciInstanceKlass* impl = implementor();
+     return (impl != this ? impl : NULL);
+   }
+ 
    // Is the defining class loader of this class the default loader?
    bool uses_default_loader() const;
  
    bool is_java_lang_Object() const;