   0  getfield_gc_i %r0, FieldDescr<rpython.rlib.rmmap.MMap.inst_access> -> %i0
   5  -live- %i0
   8  goto_if_not_int_ne %i0, $1, L1
  13  void_return
  14  ---
  14  L1:
  14  new_with_vtable <rpython.jit.backend.llsupport.descr.SizeDescr object at 0x0000555af3b4c058> -> %r0
  18  setfield_gc_r %r0, $<* struct rpy_string>, FieldDescr<rpython.rlib.rmmap.RMMapError.inst_message>
  23  assert_not_none %r0
  25  -live- %r0
  28  raise %r0
