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[Bug tree-optimization/32375] not vectorized: can't determine dependence (array sections)
- From: "spop at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 30 Oct 2007 17:01:03 -0000
- Subject: [Bug tree-optimization/32375] not vectorized: can't determine dependence (array sections)
- References: <bug-32375-33@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #4 from spop at gcc dot gnu dot org 2007-10-30 17:01 -------
Subject: Re: not vectorized: can't determine dependence (array sections)
On 1 Jul 2007 12:46:31 -0000, dorit at gcc dot gnu dot org
<gcc-bugzilla@gcc.gnu.org> wrote:
> (dependence classified: scev_not_known)
>
I still see the data dependence problem, but now the loop gets
vectorized on i686-linux with "-O3 -msse2" and also with "-O2
-ftree-vectorize -msse2"
> Looks like a similar problem to PR32378:
The same with this other PR. The testcase gets vectorized even with
the failed dependence test.
Sebastian
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32375