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[Bug middle-end/37150] vectorizer misses some loops
- From: "jv244 at cam dot ac dot uk" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 6 Aug 2009 11:11:16 -0000
- Subject: [Bug middle-end/37150] vectorizer misses some loops
- References: <bug-37150-6642@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #11 from jv244 at cam dot ac dot uk 2009-08-06 11:11 -------
(In reply to comment #10)
> Finding a benchmark could really help to push these items to the top of
> vectorizer's todo list.
we're lucky here ;-)
http://gcc.gnu.org/benchmarks/
has a link to
http://cp2k.berlios.de/gfortran/
the code discussed (in particular the above collocate_fast_2.f90) is (in a
slightly older but equivalent variant, see
ftp://ftp.berlios.de/pub/cp2k/gfortran/gcc_bench.tgz) a significant part of the
bench01 benchmark. Getting the same performance as ifort on this kernel would
speedup this benchmark with ~ 10% which would be highly significant.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37150