// result: (MOVOstoreconst [makeValAndOff(0,a.Off())] {s} p0 mem)
	for {
		c := auxIntToValAndOff(v.AuxInt)
		s := auxToSym(v.Aux)
		p1 := v_0
		x := v_1
		if x.Op != OpAMD64MOVQstoreconst {
			break
		}
		a := auxIntToValAndOff(x.AuxInt)
		if auxToSym(x.Aux) != s {
			break
		}
		mem := x.Args[1]
		p0 := x.Args[0]