Clip function / sprite shader optimization

Hello.
I'm trying to use Clip function documented here but I'm unable to find it in any shader type. Is there something I'm missing?
Alternatively, is there some other ASE friendly way of optimizing cutout sprites for minimizing overdraw / optimizing GPU performance?
Thanks.
I'm trying to use Clip function documented here but I'm unable to find it in any shader type. Is there something I'm missing?
Alternatively, is there some other ASE friendly way of optimizing cutout sprites for minimizing overdraw / optimizing GPU performance?
Thanks.