// cond: sym == sym2 && off == off2 && isSamePtr(ptr, ptr2)
	// result: (MOVBUreg x)
	for {
		off := auxIntToInt32(v.AuxInt)
		sym := auxToSym(v.Aux)
		ptr := v_0
		if v_1.Op != OpARMMOVBstore {
			break
		}
		off2 := auxIntToInt32(v_1.AuxInt)
		sym2 := auxToSym(v_1.Aux)
		x := v_1.Args[1]
		ptr2 := v_1.Args[0]
		if !(sym == sym2 && off == off2 && isSamePtr(ptr, ptr2)) {
			break
		}

		f.Warnl(v.Pos, "de-virtualizing call")
	}
	return v
}

// isSamePtr reports whether p1 and p2 point to the same address.
func isSamePtr(p1, p2 *Value) bool {
	if p1 == p2 {
		return true
	}
	if p1.Op != p2.Op {
		return false
	}
	switch p1.Op {
	case OpOffPtr:
		return p1.AuxInt == p2.AuxInt && isSamePtr(p1.Args[0], p2.Args[0])
	case OpAddr, OpLocalAddr:
		return p1.Aux == p2.Aux

	// cond: sym == sym2 && off == off2 && isSamePtr(ptr, ptr2)
	// result: (MOVBQSX x)
	for {
		off := auxIntToInt32(v.AuxInt)
		sym := auxToSym(v.Aux)
		ptr := v_0
		if v_1.Op != OpAMD64MOVBstore {
			break
		}
		off2 := auxIntToInt32(v_1.AuxInt)
		sym2 := auxToSym(v_1.Aux)
		x := v_1.Args[1]
		ptr2 := v_1.Args[0]
		if !(sym == sym2 && off == off2 && isSamePtr(ptr, ptr2)) {
			break
		}

	// cond: sym == sym2 && off == off2 && isSamePtr(ptr, ptr2)
	// result: (MOVBLSX x)
	for {
		off := auxIntToInt32(v.AuxInt)
		sym := auxToSym(v.Aux)
		ptr := v_0
		if v_1.Op != Op386MOVBstore {
			break
		}
		off2 := auxIntToInt32(v_1.AuxInt)
		sym2 := auxToSym(v_1.Aux)
		x := v_1.Args[1]
		ptr2 := v_1.Args[0]
		if !(sym == sym2 && off == off2 && isSamePtr(ptr, ptr2)) {
			break
		}