   0  -live- %r0
   0  goto_if_not_ptr_nonzero %r0, L1
   4  ref_copy %r0 -> %r1
   7  -live- %r0, %r1
   7  guard_class %r0 -> %i0
  10  -live- %i0, %r1
  10  goto_if_not_int_eq %i0, $<* struct object_vtable>, L2
  15  ref_return %r1
  17  ---
  17  L2:
  17  raise $<* struct object>
  19  ---
  19  L1:
  19  raise $<* struct object>
