This is the mail archive of the
gcc-patches@gcc.gnu.org
mailing list for the GCC project.
Re: Combine four insns
On 08/06/2010 10:37 PM, Richard Guenther wrote:
> No four into three?
I did not implement this. It's probably possible, but I'm not convinced
it would be worthwhile. There are a few other things we could try with
the combiner, such as 2->2 combinations, which is similar to what I did
with reload_combine recently.
> I think it's still reasonable (and I agree with that combine is a proper
> place to do this). Can you, for the list of examples you found where
> it helps file enhancement bugreports so that we might do sth here
> on the tree level or do better initial expansion?
Filed PRs 45214 through 45218, which should give reasonably good
coverage. I'll add a note to 42172.
Bernd