   0  -live- %r1
   0  goto_if_not_ptr_nonzero %r1, L1
   4  -live- %r1
   4  guard_class %r1 -> %i0
   7  -live- %i0
   7  goto_if_not_int_eq %i0, $<* struct object_vtable>, L2
  12  new_with_vtable <rpython.jit.backend.llsupport.descr.SizeDescr object at 0x10096124f10> -> %r0
  16  setfield_gc_r %r0, $<* struct rpy_string>, FieldDescr<pypy.objspace.std.bytesobject.W_BytesObject.inst__value>
  21  ref_return %r0
  23  ---
  23  L2:
  23  raise $<* struct object>
  25  ---
  25  L1:
  25  raise $<* struct object>
