> At the risk of being naive: implement it. I'm not quite sure what > you're looking for here?
Ok, time to ask for a hint. I started at get_best_mode(), adding a TREE argument for the type, and worked my way out, adding arguments to functions as needed to propogate the type information. It's getting out of hand. Is there some easier way to track the type that an rtx came from? Perhaps we could call get_best_mode() earlier in the whole process, and put that mode in the rtx instead of BLKmode ?
