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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/60042] New: vectorizer still does too many dependence tests for himeno:jacobi
Date: Mon, 03 Feb 2014 11:19:00 -0000	[thread overview]
Message-ID: <bug-60042-4@http.gcc.gnu.org/bugzilla/> (raw)

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60042

            Bug ID: 60042
           Summary: vectorizer still does too many dependence tests for
                    himeno:jacobi
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rguenth at gcc dot gnu.org

Created attachment 32026
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=32026&action=edit
himeno bench

I still get

himenobmtxpa.c:296:9: note: disable versioning for alias - max number of
generated checks exceeded
himenobmtxpa.c:296:9: note: too long list of versioning for alias run-time
tests.

I have a patch to remove some false dependences but still

himenobmtxpa.c:296:9: note: improved number of alias checks from 31 to 21

and 21 is too much - 7 should suffice.


             reply	other threads:[~2014-02-03 11:19 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-02-03 11:19 rguenth at gcc dot gnu.org [this message]
2014-02-03 11:23 ` [Bug tree-optimization/60042] " rguenth at gcc dot gnu.org
2014-02-03 13:51 ` rguenth at gcc dot gnu.org
2014-02-04 13:24 ` rguenth at gcc dot gnu.org
2014-02-04 13:34 ` rguenth at gcc dot gnu.org
2014-02-04 14:53 ` rguenth at gcc dot gnu.org
2014-02-04 15:09 ` rguenth at gcc dot gnu.org
2014-02-04 16:36 ` jakub at gcc dot gnu.org
2014-02-05 14:35 ` rguenth at gcc dot gnu.org
2014-04-14 13:57 ` rguenth at gcc dot gnu.org

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