// match: (MOVBZreg (RLWINM [r] y))
	// cond: mergePPC64AndRlwinm(0xFF,r) != 0
	// result: (RLWINM [mergePPC64AndRlwinm(0xFF,r)] y)
	for {
		if v_0.Op != OpPPC64RLWINM {
			break
		}
		r := auxIntToInt64(v_0.AuxInt)
		y := v_0.Args[0]
		if !(mergePPC64AndRlwinm(0xFF, r) != 0) {
			break
		}
		v.reset(OpPPC64RLWINM)
		v.AuxInt = int64ToAuxInt(mergePPC64AndRlwinm(0xFF, r))
		v.AddArg(y)
		return true