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[Bug tree-optimization/41879] [4.5 Regression] 172.mgrid regression, vectorizer prevents predictive commoning
- From: "irar at il dot ibm dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 12 Nov 2009 07:51:33 -0000
- Subject: [Bug tree-optimization/41879] [4.5 Regression] 172.mgrid regression, vectorizer prevents predictive commoning
- References: <bug-41879-10053@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #5 from irar at il dot ibm dot com 2009-11-12 07:51 -------
(In reply to comment #4)
> I didn't check yet. We'll work on a simple cost-model integration of
> predcom.
You mean, vectorizer cost model will take predcom into account?
If the vectorization is not profitable (vs. scalar without predcom), it can be
a matter of vectorizer cost model tuning (looks easier).
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41879