   0  inline_call_r_r <JitCode 'allocate_instance__W_StringIO'>, R[%r0] -> %r0
   6  -live- %r0
   6  inline_call_ir_v <JitCode 'W_IOBase.__init__'>, I[$True], R[%r0]
  13  -live- %r0
  13  newlist $0, <rpython.jit.backend.llsupport.descr.SizeDescr object at 0x1003894bb10>, FieldDescr<list.length>, FieldDescr<list.items>, <rpython.jit.backend.llsupport.descr.ArrayDescr object at 0x1003894b890> -> %r1
  24  setfield_gc_r %r0, %r1, FieldDescr<pypy.module._io.interp_stringio.W_StringIO.inst_buf>
  29  setfield_gc_i %r0, $0, FieldDescr<pypy.module._io.interp_stringio.W_StringIO.inst_pos>
  34  ref_return %r0
