   0  -live- %r1
   3  goto_if_not_ptr_nonzero %r1, L1
   7  -live- %r1
  10  guard_class %r1 -> %i0
  13  -live- %i0
  16  goto_if_not_int_eq %i0, $<* struct object_vtable>, L2
  21  ref_return $<* struct pypy.interpreter.baseobjspace.W_Root>
  23  ---
  23  L2:
  23  L3:
  23  raise $<* struct object>
  25  ---
  25  L1:
  25  goto L3
