   0  inline_call_r_r <JitCode 'allocate_instance__W_BytesIO'>, R[%r0] -> %r0
   6  -live- %r0
   9  inline_call_ir_v <JitCode 'W_IOBase.__init__'>, I[$False], R[%r0]
  16  -live- %r0
  19  setfield_gc_i %r0, $False, FieldDescr<pypy.module._io.interp_bytesio.W_BytesIO.inst__RStringIO__closed>
  24  setfield_gc_r %r0, $<* struct stringbuilder>, FieldDescr<pypy.module._io.interp_bytesio.W_BytesIO.inst__RStringIO__strings>
  29  setfield_gc_r %r0, $<* struct list>, FieldDescr<pypy.module._io.interp_bytesio.W_BytesIO.inst__RStringIO__bigbuffer>
  34  setfield_gc_i %r0, $-1, FieldDescr<pypy.module._io.interp_bytesio.W_BytesIO.inst__RStringIO__pos>
  39  ref_return %r0
