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 4148E398B144; Wed,  9 Jun 2021 07:55:30 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 4148E398B144
From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/100981] ICE in info_for_reduction, at
 tree-vect-loop.c:4897
Date: Wed, 09 Jun 2021 07:55:30 +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: 12.0
X-Bugzilla-Keywords: ice-on-valid-code
X-Bugzilla-Severity: normal
X-Bugzilla-Who: rguenth 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: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-100981-4-mytakaVgxL@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-100981-4@http.gcc.gnu.org/bugzilla/>
References: <bug-100981-4@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, 09 Jun 2021 07:55:30 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D100981

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Runtime testcase (not sure if sufficient ...).  Andre - can you verify it
passes runtime testing with the patch on HW that supports the complex mul?

complex function cdcdot(n, cx)
  implicit none

  integer :: n, i, kx
  complex :: cx(*)
  double precision :: dsdotr, dsdoti, dt1, dt3

  kx =3D 1
  do i =3D 1, n
     dt1 =3D real(cx(kx))
     dt3 =3D aimag(cx(kx))
     dsdotr =3D dsdotr + dt1 * 2 - dt3 * 2
     dsdoti =3D dsdoti + dt1 * 2 + dt3 * 2
     kx =3D kx + 1
  end do
  cdcdot =3D cmplx(real(dsdotr), real(dsdoti))
  return
end function cdcdot
program test
  implicit none
  complex :: cx(100), ct, cdcdot
  integer :: i
  do i =3D 1, 100
    cx(i) =3D cmplx(2*i, i)
  end do
  ct =3D cdcdot (100, cx)
  if (ct.ne.cmplx(10100.0000,30300.0000)) call abort
end=