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 D3BE93850412; Mon, 31 Jan 2022 14:37:29 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org D3BE93850412
From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/104307] New: [11/12 Regression] '-fcompare-debug'
 failure (length) w/ -mavx512f -O2
Date: Mon, 31 Jan 2022 14:37:29 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: target
X-Bugzilla-Version: 12.0
X-Bugzilla-Keywords: compare-debug-failure
X-Bugzilla-Severity: normal
X-Bugzilla-Who: asolokha at gmx dot com
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status
 keywords bug_severity priority component assigned_to reporter
 target_milestone cf_gcctarget attachments.created
Message-ID: <bug-104307-4@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: Mon, 31 Jan 2022 14:37:29 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D104307

            Bug ID: 104307
           Summary: [11/12 Regression] '-fcompare-debug' failure (length)
                    w/ -mavx512f -O2
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Keywords: compare-debug-failure
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: asolokha at gmx dot com
  Target Milestone: ---
            Target: x86_64-unknown-linux-gnu

Created attachment 52319
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D52319&action=3Dedit
gkd diff

gcc 12.0.1 20220123 snapshot (g:2da90ad39bf8fa9ee287e040d1f4411cb7a2e7ed) f=
ails
-fcompare-debug check when compiling gcc/testsuite/gcc.target/i386/pr78669.=
c w/
-Os -funroll-loops:

% x86_64-unknown-linux-gnu-gcc-12.0.1 -mavx512f -O2 -fcompare-debug
-gno-statement-frontiers -c gcc/testsuite/gcc.target/i386/pr78669.c
x86_64-unknown-linux-gnu-gcc-12.0.1: error:
gcc/testsuite/gcc.target/i386/pr78669.c: '-fcompare-debug' failure (length)

gkd diff attached.

-fcompare-debug check also fails w/o -mavx512f, though the diff is differen=
t.

If I get the dumps right, this issue is not related to PR104054, as things
already start looking interesting since veclower21 tree dump.=