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[Bug middle-end/37150] vectorizer issue
- 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: 19 Aug 2008 10:53:44 -0000
- Subject: [Bug middle-end/37150] vectorizer issue
- References: <bug-37150-6642@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #4 from jv244 at cam dot ac dot uk 2008-08-19 10:53 -------
(In reply to comment #2)
> Note that the first complete unrolling pass unrolls loops that result in
> smaller code. This interferes with vectorization in your case, so can
> you try
unfortunately, the patch below doesn't apply to trunk anymore. I applied it by
hand, and get similar improvements like the ones observed by Tobias.
Ifort : 1.54s
Gfortran (unpatched) : 3.30s
Gfortran (patched) : 1.94s
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37150