   0  getfield_gc_i %r0, FieldDescr<rpython.rlib.rmmap.MMap.inst_data> -> %i0
   5  int_add %i0, $0 -> %i0
   9  residual_call_ir_i $<* fn munmap>, I[%i0, %i1], R[], <CallDescr(ii) EF=2> -> %i0
  18  void_return
