From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugzilla@gcc.gnu.org>
Received: by sourceware.org (Postfix, from userid 48)
 id D6AAF3846405; Wed, 27 Jan 2021 14:52:25 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org D6AAF3846405
From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/98854] [11 Regression] cray benchmark is
 about 15% slower since r11-4428-g4a369d199bf2f34e
Date: Wed, 27 Jan 2021 14:52:25 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: tree-optimization
X-Bugzilla-Version: 11.0
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: marxin at gcc dot gnu.org
X-Bugzilla-Status: ASSIGNED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: rguenth at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 11.0
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-98854-4-no0S78iWvC@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-98854-4@http.gcc.gnu.org/bugzilla/>
References: <bug-98854-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-BeenThere: gcc-bugs@gcc.gnu.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Gcc-bugs mailing list <gcc-bugs.gcc.gnu.org>
List-Unsubscribe: <https://gcc.gnu.org/mailman/options/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=unsubscribe>
List-Archive: <https://gcc.gnu.org/pipermail/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-request@gcc.gnu.org?subject=help>
List-Subscribe: <https://gcc.gnu.org/mailman/listinfo/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=subscribe>
X-List-Received-Date: Wed, 27 Jan 2021 14:52:25 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98854

--- Comment #7 from Martin Li=C5=A1ka <marxin at gcc dot gnu.org> ---
> I used -O3 but -O2 -ftree-slp-vectorize also vectorizes it.

I must be blind, but I see for the current master:

gcc pr98854.c -c -O2 -ftree-slp-vectorize -fdump-tree-optimized=3D/dev/stdo=
ut

foo (int n)
{
  unsigned long ivtmp.8;
  double y;
  double x;
  double _6;
  double _8;
  double _9;
  double _11;
  int _14;
  void * _29;
  unsigned long _31;

  <bb 2>:
  ivtmp.8_28 =3D (unsigned long) &MEM[(void *)&a + 8184B];
  _31 =3D (unsigned long) &a;

  <bb 3>:
  # x_1 =3D PHI <0.0(2), x_10(5)>
  # y_2 =3D PHI <0.0(2), y_12(5)>
  # ivtmp.8_18 =3D PHI <ivtmp.8_28(2), ivtmp.8_27(5)>
  _29 =3D (void *) ivtmp.8_18;
  _6 =3D MEM[base: _29, offset: 0B];
  _8 =3D MEM[base: _29, offset: 8B];
  _9 =3D _6 + _8;
  x_10 =3D _9 + x_1;
  _11 =3D _6 / _8;
  y_12 =3D _11 + y_2;
  _14 =3D bar ();
  if (_14 !=3D 0)
    goto <bb 4>;
  else
    goto <bb 5>;

  <bb 4>:
  a[0] =3D x_10;
  a[1] =3D y_12;
  return;

  <bb 5>:
  ivtmp.8_27 =3D ivtmp.8_18 - 8;
  if (ivtmp.8_27 !=3D _31)
    goto <bb 3>;
  else
    goto <bb 4>;

}=