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 E81C53881810; Wed, 12 Jun 2024 12:33:59 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org E81C53881810
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1718195639;
	bh=PGTaEX/50JSKMbHEsjh1skm53uCxtmK2daBUKqoVprs=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=XxvfxwK+E5Pp7IWrC2REaoVpR5IQJweXm5v4ogdqYM6yKVR859XibcHWpTHL5lDVl
	 B4c5L0ym/Urcnr/goBAXo7PbNFJsDdJmZOm3ghfQItLavN2suY50aI3Qr7qTwmX7QQ
	 VWgpEiK9ri1OtmgDclcyWTSj/Ndkv2F45y3FPlqQ=
From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/111497] [11/12 Regression] ICE building mariadb on
 i686 since r8-470
Date: Wed, 12 Jun 2024 12:33:58 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: middle-end
X-Bugzilla-Version: 13.2.1
X-Bugzilla-Keywords: ice-on-valid-code
X-Bugzilla-Severity: normal
X-Bugzilla-Who: cvs-commit at gcc dot gnu.org
X-Bugzilla-Status: NEW
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P2
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 11.5
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-111497-4-xyeDsUuEkB@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-111497-4@http.gcc.gnu.org/bugzilla/>
References: <bug-111497-4@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=3D111497

--- Comment #10 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-12 branch has been updated by Richard Biener
<rguenth@gcc.gnu.org>:

https://gcc.gnu.org/g:959cef942508b818c7dcb8df0f3c7bf4968d406a

commit r12-10554-g959cef942508b818c7dcb8df0f3c7bf4968d406a
Author: Vladimir N. Makarov <vmakarov@redhat.com>
Date:   Mon Sep 25 16:19:50 2023 -0400

    [PR111497][LRA]: Copy substituted equivalence

    When we substitute the equivalence and it becomes shared, we can fail
    to correctly update reg info used by LRA.  This can result in wrong
    code generation, e.g. because of incorrect live analysis.  It can also
    result in compiler crash as the pseudo survives RA.  This is what
    exactly happened for the PR.  This patch solves this problem by
    unsharing substituted equivalences.

    gcc/ChangeLog:

            PR middle-end/111497
            * lra-constraints.cc (lra_constraints): Copy substituted
            equivalence.
            * lra.cc (lra): Change comment for calling unshare_all_rtl_agai=
n.

    gcc/testsuite/ChangeLog:

            PR middle-end/111497
            * g++.target/i386/pr111497.C: new test.

    (cherry picked from commit 3c23defed384cf17518ad6c817d94463a445d21b)=