src/share/vm/opto/parse2.cpp

@@ -2280,10 +2280,15 @@
       inc_sp(1);
       Node* null_ctl = top();
       b = null_check_oop(b, &null_ctl, true, true, true);
       assert(null_ctl->is_top(), "no null control here");
       dec_sp(1);
+    } else if (_gvn.type(b)->speculative_always_null() &&
+               !too_many_traps(Deoptimization::Reason_speculate_null_assert)) {
+      inc_sp(1);
+      b = null_assert(b);
+      dec_sp(1);
     }
     c = _gvn.transform( new CmpPNode(b, a) );
     do_ifnull(btest, c);
     break;