On 08/02/2016 11:46 AM, Richard Biener wrote:
True. I just haven't seen that the don't care bits created by paradoxical subregs has actually been all that useful in practice.But we love to exploit undefined behavior elsewhere, too. Now the init-regs pass comes to my mind again (papering over issues elsewhere)..
In fact, I've seen subregs get in the way often, but if the code had a normal extension it would have been optimized better.
Jeff
