   0  getfield_gc_r %r0, FieldDescr<pypy.interpreter.typedef.W_BytesIOUser.inst_storage> -> %r0
   5  setarrayitem_gc_r %r0, %i0, %r1, <rpython.jit.backend.llsupport.descr.ArrayDescr object at 0x0000aaab222b05d0>
  11  void_return
