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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/49849] loop optimization prevents vectorization
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49849

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

           What    |Removed                     |Added
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                 CC|                            |spop at gcc dot gnu.org

--- Comment #4 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-07-26 09:45:55 UTC ---
(In reply to comment #3)
> Thanks Richard,
> --param max-completely-peel-times=1
> does the trick and, in my real life example, does not have any adverse effect
> elsewhere
> while it speeds up the loop as expected.
> More in general,
> Do you think that GCC will ever be able to transform things like foo into bar
> by itself?

I hope so ;)  The graphite framework is supposed to provide us with
this kind of features.