v.AddArg(x)
		return true
	}
	// match: (MOVBreg y:(MOVBreg _))
	// result: y
	for {
		y := v_0
		if y.Op != OpPPC64MOVBreg {
			break
		}
		v.copyOf(y)
		return true
	}
	// match: (MOVBreg (MOVBZreg x))
	// result: (MOVBreg x)
	for {
		if v_0.Op != OpPPC64MOVBZreg {
			break
		}
		x := v_0.Args[0]
		v.reset(OpPPC64MOVBreg)
		v.AddArg(x)
		return true

		} else { // result is not SSA-able; not escaped, so not on heap, but too large for SSA.
			// Before register ABI this ought to be a self-move, home=dest,
			// With register ABI, it's still a self-move if parameter is on stack (i.e., too big or overflowed)
			// No VarDef, as the result slot is already holding live value.
			results[i] = s.newValue2(ssa.OpDereference, n.Type(), s.addr(n), s.mem())