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 0FBD1385C6D9; Wed, 13 Dec 2023 08:00:24 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 0FBD1385C6D9
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1702454425;
	bh=CGoMtxGDH0vmeNkrBHn5Gr1QgWQ6pUdxE0psAXq1FrQ=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=XreP1y8i2lxh9ZwQL9GAPwF7MCrYLgi6rBbsYGLEfO2DMarfFIzTonqYrUiRLCf9q
	 a/pk7OSnyGLUHydReGZ7DXJTmcBcq2hsTevocC5Ut+QumFEolUlIKnZTuQ5AiAZLhU
	 YaJA0L8DM1jTIMla4XJKzuVDKIHat2DspHSu72cY=
From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/111591] ppc64be: miscompilation with -mstrict-align /
 -O3
Date: Wed, 13 Dec 2023 08:00:22 +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: 13.2.0
X-Bugzilla-Keywords: needs-bisection
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: rguenth at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-111591-4-zaIIYIieNa@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-111591-4@http.gcc.gnu.org/bugzilla/>
References: <bug-111591-4@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=3D111591

--- Comment #33 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Richard Biener <rguenth@gcc.gnu.org>:

https://gcc.gnu.org/g:97094d2ffd7d00261e6d7cc5d4a62dc7c2c89b64

commit r14-6481-g97094d2ffd7d00261e6d7cc5d4a62dc7c2c89b64
Author: Richard Biener <rguenther@suse.de>
Date:   Wed Dec 13 08:54:49 2023 +0100

    middle-end/111591 - explain why TBAA doesn't need adjustment

    While tidying the prototype patch I've done for the reduced testcase
    in PR111591 and in that process trying to produce a testcase that
    is miscompiled by stack slot coalescing and the TBAA info that
    remains un-altered I've realized we do not need to adjust TBAA info.

    The following documents this in the place we adjust points-to info
    which we do need to adjust.

            PR middle-end/111591
            * cfgexpand.cc (update_alias_info_with_stack_vars): Document
            why not adjusting TBAA info on accesses is OK.=