[Bug tree-optimization/49006] [4.6/4.7 Regression] Missed vectorization due to revision 167531

rguenther at suse dot de gcc-bugzilla@gcc.gnu.org
Tue Aug 2 08:38:00 GMT 2011


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)



More information about the Gcc-bugs mailing list