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 E39CE3858439; Thu, 25 Jan 2024 19:58:06 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org E39CE3858439
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1706212686;
	bh=cIOK4Ml8PUU9XELcRSk0UKywJvpKoRqr9t5z6ZAcb84=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=M18fiA8ovDXiG2RRMAHL+mr1On7VVQoWDaMssN2auA4Nsq/+m2duiwvDcgxNOq6Oc
	 jiGwjquP8YbPDx5r8mOJjzc+erlvK+oQnc65e+ZQTVyUp5h3zhoL7gum9Off6bkA7z
	 6wDTX1LRodRhSPzdbJaIVuMFMNU9ifTlja6yM+yE=
From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/100204] aarch64: UB evaluating J constraint
Date: Thu, 25 Jan 2024 19:58:03 +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: 11.0
X-Bugzilla-Keywords: ice-on-valid-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: pinskia at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-100204-4-6WqA1xM18h@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-100204-4@http.gcc.gnu.org/bugzilla/>
References: <bug-100204-4@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
List-Id: <gcc-bugs.sourceware.org>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D100204

--- Comment #3 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The trunk branch has been updated by Andrew Pinski <pinskia@gcc.gnu.org>:

https://gcc.gnu.org/g:f03b8f595b6350732bb0a9a69557c5ed2af085b2

commit r14-8436-gf03b8f595b6350732bb0a9a69557c5ed2af085b2
Author: Andrew Pinski <quic_apinski@quicinc.com>
Date:   Thu Jan 25 08:30:36 2024 -0800

    aarch64: Fix undefinedness while testing the J constraint [PR100204]

    The J constraint can invoke undefined behavior due to it taking the
    negative of the ival if ival was HWI_MIN. The fix is simple as casting
    to `unsigned HOST_WIDE_INT` before doing the negative of it. This
    does that.

    Committed as obvious after build/test for aarch64-linux-gnu.

    gcc/ChangeLog:

            PR target/100204
            * config/aarch64/constraints.md (J): Cast to `unsigned
HOST_WIDE_INT`
            before taking the negative of it.

    Signed-off-by: Andrew Pinski <quic_apinski@quicinc.com>=