if z.Op != OpPPC64MOVBZreg {
			break
		}
		x := z.Args[0]
		if !(c < 8 && z.Uses == 1) {
			break
		}
		v.reset(OpPPC64CLRLSLDI)
		v.AuxInt = int32ToAuxInt(newPPC64ShiftAuxInt(c, 56, 63, 64))
		v.AddArg(x)
		return true
	}
	// match: (SLDconst [c] z:(MOVHZreg x))
	// cond: c < 16 && z.Uses == 1
	// result: (CLRLSLDI [newPPC64ShiftAuxInt(c,48,63,64)] x)
	for {