*** old/src/share/vm/opto/ifnode.cpp	Wed Jul 20 14:06:32 2011
--- new/src/share/vm/opto/ifnode.cpp	Wed Jul 20 14:06:31 2011

*** 253,262 ****
--- 253,270 ----
        phi_x   ->init_req( i_x++, phi->in(i) );
        if (r->in(i) == predicate_proj)
          predicate_x = predicate_proj;
      }
    }
+   if (predicate_c != NULL && (req_c > 1)) {
+     assert(predicate_x == NULL, "only one predicate entry expected");
+     predicate_c = NULL; // Do not clone predicate below merge point
+   }
+   if (predicate_x != NULL && ((len - req_c) > 2)) {
+     assert(predicate_c == NULL, "only one predicate entry expected");
+     predicate_x = NULL; // Do not clone predicate below merge point
+   }
  
    // Register the new RegionNodes but do not transform them.  Cannot
    // transform until the entire Region/Phi conglomerate has been hacked
    // as a single huge transform.
    igvn->register_new_node_with_optimizer( region_c );