   0  new_with_vtable <rpython.jit.backend.llsupport.descr.SizeDescr object at 0x000002aa8c4dd168> -> %r1
   4  setfield_gc_r %r1, %r0, FieldDescr<pypy.objspace.std.bytesobject.W_BytesObject.inst__value>
   9  ref_return %r1
