Add flag 'implements' to class, it is set anytime someone implements this class. This is a way to r…

runtime/vm/class_finalizer.cc

Index: runtime/vm/class_finalizer.cc
===================================================================
--- runtime/vm/class_finalizer.cc	(revision 15471)
+++ runtime/vm/class_finalizer.cc	(working copy)
@@ -104,6 +104,22 @@
 }
 
 
+static void MarkImplementedClasses(const GrowableObjectArray& class_array) {
+  Class& cls = Class::Handle();
+  Array& interfaces_array = Array::Handle();
+  Type& type = Type::Handle();
+  for (intptr_t i = 0; i < class_array.Length(); i++) {
+    cls ^= class_array.At(i);
+    interfaces_array = cls.interfaces();
+    for (intptr_t k = 0; k < interfaces_array.Length(); k++) {
+      type ^= interfaces_array.At(k);
+      cls = type.type_class();
+      cls.set_is_implemented();
+    }
+  }
+}
+
+
 // Class finalization occurs:
 // a) when bootstrap process completes (VerifyBootstrapClasses).
 // b) after the user classes are loaded (dart_api).
@@ -156,6 +172,7 @@
         PrintClassInformation(cls);
       }
     }
+    MarkImplementedClasses(class_array);

[regis, 2012/11/28 22:32:17]

Instead of adding another pass, you could mark interfaces directly inside
ResolveInterfaces().

[srdjan, 2012/11/28 22:43:50]

Done.

     // Clear pending classes array.
     class_array = GrowableObjectArray::New();
     object_store->set_pending_classes(class_array);