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[Bug target/57796] AVX2 gather vectorization: code bloat and reduction of performance
- From: "jakub at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 05 Jul 2013 13:49:26 +0000
- Subject: [Bug target/57796] AVX2 gather vectorization: code bloat and reduction of performance
- Auto-submitted: auto-generated
- References: <bug-57796-4 at http dot gcc dot gnu dot org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57796
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
By tuning I've meant the vectorizer cost model. If the desirability of gathers
vs. no vectorization at all doesn't depend only on the insns in the loop, but
also on how many iterations the loop has, then perhaps we'd need to runtime
version it or something.