   0  getfield_gc_r %r0, FieldDescr<rpython.rlib.streamio.TextInputFilter.inst_base> -> %r0
   5  -live- %r0
   5  guard_class %r0 -> %i0
   8  getfield_raw_i %i0, FieldDescr<rpython.rlib.streamio.Stream_vtable.cls_try_to_find_file_descriptor> -> %i0
  13  -live- %i0, %r0
  13  int_guard_value %i0
  15  residual_call_r_i %i0, <IndirectCallTargets>, R[%r0], <CallDescr(r) EF=2> -> %i0
  22  -live- %i0
  22  int_return %i0
