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[Bug tree-optimization/49006] [4.6/4.7 Regression] Missed vectorization due to revision 167531
- From: "rguenther at suse dot de" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 2 Aug 2011 08:37:59 +0000
- Subject: [Bug tree-optimization/49006] [4.6/4.7 Regression] Missed vectorization due to revision 167531
- Auto-submitted: auto-generated
- References: <bug-49006-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49006
--- Comment #8 from rguenther at suse dot de <rguenther at suse dot de> 2011-08-02 08:37:28 UTC ---
On Mon, 1 Aug 2011, irar at il dot ibm.com wrote:
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49006
>
> --- Comment #7 from Ira Rosen <irar at il dot ibm.com> 2011-08-01 14:47:08 UTC ---
> I think that this is not really a missed-optimization. It's just that some
> loops disappear because of the unrolling.
Ah, ok - so SLP vectorization won't print a "vectorized loop X" if it
would vectorize the unrolled variant? (not sure if it easily could)