search for: db5d4cb5

Why not just form them via a fast IR level pass and just have patterns match in fast isel instead of trying to form code? Or are we saying the same thing? (Your words of "fast isel spot"ting and "form better code" caused me to think you mean to do optimizations within the fast isel pass). -eric On Wed, Dec 12, 2012 at 5:14 PM, Michael Ilseman <milseman at apple.com>

...hen fast-isel will just handle whatever new instruction you've got. An example of IR would be useful though :) >>> >>> -eric > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20121212/db5d4cb5/attachment.html>

Right now we're shying towards having a re-association helper in codegen-prepare that will re-associate expressions (if allowed). This would allow fast-isel to more easily spot FMA opportunities, and form better code. On Dec 12, 2012, at 5:11 PM, Eric Christopher <echristo at gmail.com> wrote: > > > > You hit send right when I did! > For your example, do you mean that