On Mon, 11 Jun 2012, David Edelsohn wrote: > On Mon, Jun 11, 2012 at 7:40 AM, Richard Guenther <rguent...@suse.de> wrote: > > > Hmm. I don't like this patch or its general idea too much. Instead > > I'd like us to move more of the cost model detail to the target, giving > > it a chance to look at the whole loop before deciding on a cost. ISTR > > posting the overall idea at some point, but let me repeat it here instead > > of trying to find that e-mail. > > Richard, > > Allowing the target to see the entire loop and have more control over > the cost model is a fine goal, but the current code is using incorrect > heuristics. Requiring a complete re-write of the auto-vectorizer cost > model should not be a requirement for fixing the current code.
If fixing the current code adds more "magic" hooks at the wrong spot then yes, in stage1 I can make you think about a more proper solution to the issue. Richard.
