[Bug tree-optimization/49849] loop optimization prevents vectorization

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49849

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2011.07.26 09:21:16
     Ever Confirmed|0                           |1

--- Comment #2 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-07-26 09:21:16 UTC ---
The loop likely completely unrolled, you can disable that with
--param max-completely-peel-times=1.

I think scalar-code vectorization does not handle this right now because
the temporary arrays that would help it have store-motion applied (and
should be later optimized away, but are not).