   0  getfield_gc_r %r0, FieldDescr<pypy.interpreter.typedef.W_IOBaseUser.inst_storage> -> %r0
   5  arraylen_gc %r0, <rpython.jit.backend.llsupport.descr.ArrayDescr object at 0x0000aaab39610758> -> %i0
  10  int_return %i0
