   0  getfield_gc_i %r0, FieldDescr<pypy.module._rawffi.interp_rawffi.W_DataInstance.inst_ll_buffer> -> %i0
   5  residual_call_ir_r $<* fn fromrarith_int__r_uint>, I[%i0], R[], <CallDescr(i) EF=4> -> %r0
  13  -live- %r0
  13  new_with_vtable <rpython.jit.backend.llsupport.descr.SizeDescr object at 0x0000000176b975c8> -> %r1
  17  setfield_gc_r %r1, %r0, FieldDescr<pypy.objspace.std.longobject.W_LongObject.inst_num>
  22  ref_return %r1
