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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/80928] SLP vectorization does not handle induction in outer loop vectorization
Date: Tue, 27 Oct 2020 11:52:41 +0000	[thread overview]
Message-ID: <bug-80928-4-6ALgAhHJfb@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-80928-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80928

--- Comment #31 from Richard Biener <rguenth at gcc dot gnu.org> ---
The following is a testcase triggering the

      /* FORNOW: outer loop induction with SLP not supported.  */
      if (STMT_SLP_TYPE (stmt_info))
        return false;

test:

double image[40];

void
foo (void)
{
  for (int i = 0; i < 20; i++)
    {
      double suma = 0;
      double sumb = 0;
      for (int j = 0; j < 40; j++)
        {
          suma += j+i;
          sumb += j+i;
        }
      image[2*i] = suma;
      image[2*i+1] = sumb;
    }
}

  parent reply	other threads:[~2020-10-27 11:52 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <bug-80928-4@http.gcc.gnu.org/bugzilla/>
2020-10-19 10:05 ` asolokha at gmx dot com
2020-10-19 12:16 ` rguenth at gcc dot gnu.org
2020-10-19 12:39 ` rguenth at gcc dot gnu.org
2020-10-19 15:37 ` rguenth at gcc dot gnu.org
2020-10-27 11:52 ` rguenth at gcc dot gnu.org [this message]
2020-11-03 12:33 ` cvs-commit at gcc dot gnu.org
2020-11-03 12:41 ` rguenth at gcc dot gnu.org

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