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[Bug target/57796] AVX2 gather vectorization: code bloat and reduction of performance
- From: "vincenzo.innocente at cern dot ch" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 19 Jun 2014 08:17:27 +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/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57796
--- Comment #5 from vincenzo Innocente <vincenzo.innocente at cern dot ch> ---
so with latest 4.9
gcc version 4.10.0 20140611 (experimental) [trunk revision 211467] (GCC)
situation has not changed much (the scalar version is now faster!):
I think that the cost of gather instructions is still under-estimated