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 A6B4E3858406; Thu,  9 Dec 2021 02:39:03 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org A6B4E3858406
From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/103302] wrong code with -fharden-compares
Date: Thu, 09 Dec 2021 02:39:03 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: target
X-Bugzilla-Version: 12.0
X-Bugzilla-Keywords: wrong-code
X-Bugzilla-Severity: normal
X-Bugzilla-Who: cvs-commit at gcc dot gnu.org
X-Bugzilla-Status: ASSIGNED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: aoliva at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-103302-4-ZC30PCQF18@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-103302-4@http.gcc.gnu.org/bugzilla/>
References: <bug-103302-4@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: Thu, 09 Dec 2021 02:39:03 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103302

--- Comment #12 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Alexandre Oliva <aoliva@gcc.gnu.org>:

https://gcc.gnu.org/g:50e8b0c9bca6cdc57804f860ec5311b641753fbb

commit r12-5852-g50e8b0c9bca6cdc57804f860ec5311b641753fbb
Author: Alexandre Oliva <oliva@adacore.com>
Date:   Wed Dec 8 23:37:14 2021 -0300

    [PR103302] skip multi-word pre-move clobber during lra

    If we emit clobbers before multi-word moves during lra, we get
    confused if a copy ends up with input or output replaced with each
    other: the clobber then kills the previous set, and it gets deleted.

    This patch avoids emitting such clobbers when lra_in_progress.


    for  gcc/ChangeLog

            PR target/103302
            * expr.c (emit_move_multi_word): Skip clobber during lra.

    for  gcc/testsuite/ChangeLog

            PR target/103302
            * gcc.target/riscv/pr103302.c: New.=