   0  -live- %r0
   0  guard_class %r0 -> %i0
   3  getfield_raw_i %i0, FieldDescr<pypy.objspace.std.bytesobject.W_AbstractBytesObject_vtable.cls_descr_str> -> %i0
   8  -live- %i0, %r0
   8  switch %i0, <SwitchDictDescr 0:L1, 1:L2>
  12  unreachable
  13  ---
  13  L1:
  13  -live- %r0
  13  -live- %r0
  13  guard_class %r0 -> %i0
  16  -live- %i0, %r0
  16  goto_if_not_int_eq %i0, $<* struct object_vtable>, L3
  21  L4:
  21  ref_return %r0
  23  ---
  23  L3:
  23  getfield_gc_r_pure %r0, FieldDescr<pypy.objspace.std.bytesobject.W_BytesObject.inst__value> -> %r1
  28  new_with_vtable <rpython.jit.backend.llsupport.descr.SizeDescr object at 0x10096124f10> -> %r0
  32  setfield_gc_r %r0, %r1, FieldDescr<pypy.objspace.std.bytesobject.W_BytesObject.inst__value>
  37  goto L4
  40  ---
  40  L2:
  40  -live-
  40  ref_return $<* struct pypy.interpreter.baseobjspace.W_Root>
