   0  residual_call_r_r $<* fn _ll_0_alloc_with_del___>, R[], <CallDescr() EF=5> -> %r0
   6  -live- %r0
   6  -live- %r0
   6  goto_if_not_ptr_iszero %r0, L1
  10  ref_return $<* struct pypy.interpreter.baseobjspace.W_Root>
  12  ---
  12  L1:
  12  ref_return %r0
