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From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/37021] Fortran Complex reduction / multiplication not vectorized
Date: Tue, 19 Aug 2008 15:31:00 -0000	[thread overview]
Message-ID: <20080819152959.8811.qmail@sourceware.org> (raw)
In-Reply-To: <bug-37021-10053@http.gcc.gnu.org/bugzilla/>



------- Comment #2 from rguenth at gcc dot gnu dot org  2008-08-19 15:29 -------
3) is because data-ref requires a constant step

  else if (!simple_iv (loop, stmt, poffset, &offset_iv, false))
    {
      if (dump_file && (dump_flags & TDF_DETAILS))
        fprintf (dump_file, "failed: evolution of offset is not affine.\n");
      return;

but the step is (<unnamed-signed:64>) ((<unnamed-unsigned:64>) stride.3_36 *
16)

as we are dealing with general incoming arrays which are arbitrary striped.
Fixing this requires for example versioning for a constant stride.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37021


  parent reply	other threads:[~2008-08-19 15:31 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-08-04 17:57 [Bug tree-optimization/37021] New: " rguenth at gcc dot gnu dot org
2008-08-04 17:59 ` [Bug tree-optimization/37021] " rguenth at gcc dot gnu dot org
2008-08-19 15:31 ` rguenth at gcc dot gnu dot org [this message]
2009-01-21 15:43 ` rguenth at gcc dot gnu dot org
2009-01-23 15:33 ` rguenth at gcc dot gnu dot org
2009-01-23 15:36 ` rguenth at gcc dot gnu dot org
2009-01-25  9:13 ` irar at il dot ibm dot com
2009-01-25 11:04 ` rguenther at suse dot de
2009-01-25 12:17 ` irar at il dot ibm dot com
2009-01-27 12:40 ` dorit at gcc dot gnu dot org
     [not found] <bug-37021-4@http.gcc.gnu.org/bugzilla/>
2011-03-25 11:49 ` sebastian.hegler@tu-dresden.de
2011-03-25 12:27 ` sebastian.hegler@tu-dresden.de
2011-03-25 13:13 ` rguenther at suse dot de
2012-07-13  8:46 ` rguenth at gcc dot gnu.org
2013-02-13 15:58 ` rguenth at gcc dot gnu.org
2013-03-27 10:39 ` rguenth at gcc dot gnu.org
2013-03-27 10:40 ` rguenth at gcc dot gnu.org
2013-04-07 13:18 ` dominiq at lps dot ens.fr
2015-05-12 11:56 ` rguenth at gcc dot gnu.org
2015-06-10 10:45 ` rguenth at gcc dot gnu.org
2015-08-25  8:11 ` rguenth at gcc dot gnu.org
2015-08-27 22:09 ` wschmidt at gcc dot gnu.org
2015-08-28  7:46 ` rguenther at suse dot de
2015-08-28 13:20 ` wschmidt at gcc dot gnu.org
2015-08-28 13:31 ` wschmidt at gcc dot gnu.org
2015-10-22 10:03 ` rguenth at gcc dot gnu.org
2023-07-21 12:28 ` rguenth at gcc dot gnu.org

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