When I went to use opt_reassociate for tu, I was advised that you want to
do this loop to get the best results. If everyone needs it, let's make it
common code and explain what's going on.
In the process, also make it skip work appropriately when there's no
progress.
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36342>
See the comment at the top file :-)
The ideas in this pass are based on LLVM. The implementation itself is from
scratch because have you /tried/ to read that thing?
Because LLVM and therefore prop drivers do these optimizations, this should help
narrow Mesa's performance gap with the blobs.
This probably needs some tuning for best results on other ISAs, but the stats
for AGX speak for themselves, see next commits.
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Acked-by: Adam Jackson <ajax@redhat.com>
Reviewed-by: Mel Henning <mhenning@darkrefraction.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36147>
