Some intrinsic may need to check several classes in predicate for which intrinsic should be generated.
The mechanism of intrinsic_foo_predicate() and intrinsic_foo() was designed only to check one class so that you don't need class check in intrinsic_foo().
But for several classes you have to check instanceOf for all of them in both intrinsic_foo_predicate() and intrinsic_foo().
We need to expand this functionality to do something like next in PredictedIntrinsicGenerator::generate():

  int klass_cnt = intrinsic_foo_klass_count();
  Node* result_region = new Region(klass_cnt+1);
  for (int i = 0; i < klass_cnt; i++) {
    false_control = intrinsic_foo_predicate(i);
    intrinsic_foo(i);
    result_region->set_req(i, control());
    set_control(false_control);
  }
  generate_normal_compile()
  result_region->set_req(klass_cnt, control());
  set_control(result_region);