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 D8EA43858436; Tue, 19 Mar 2024 12:12:11 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org D8EA43858436
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1710850331;
	bh=kaSE2ylu42uKI8AS3dBrP3ht5ork5Hh8nCqAu6cANKg=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=ukw1278UNG/mJD/w6ZQrg7qo1ajmGyeM5i3ddeSuXWYdS9jQxmyQNlHdYHX33gYVc
	 eqzcfStFuZNWkwnjAmh1e3RFME4V8ruzt+pvP4vNxz55o8oKMFfdORd9bkrKwUvhXN
	 ca3V9rXfs/f65Yqen9u4emEWZeL2GgGYmTxDgHx8=
From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/114322] [14 Regression] SCEV analysis failed
 for bases like A[(i+x)*stride] since r14-9193-ga0b1798042d033
Date: Tue, 19 Mar 2024 12:12:08 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: tree-optimization
X-Bugzilla-Version: 14.0
X-Bugzilla-Keywords: 
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: 14.0
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-114322-4-KhF7ZYFFZU@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-114322-4@http.gcc.gnu.org/bugzilla/>
References: <bug-114322-4@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=3D114322

--- Comment #2 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:e0e9499aeffdaca88f0f29334384aa5f710a81a4

commit r14-9540-ge0e9499aeffdaca88f0f29334384aa5f710a81a4
Author: Richard Biener <rguenther@suse.de>
Date:   Tue Mar 19 12:24:08 2024 +0100

    tree-optimization/114151 - revert PR114074 fix

    The following reverts the chrec_fold_multiply fix and only keeps
    handling of constant overflow which keeps the original testcase
    fixed.  A better solution might involve ranger improvements or
    tracking of assumptions during SCEV analysis similar to what niter
    analysis does.

            PR tree-optimization/114151
            PR tree-optimization/114269
            PR tree-optimization/114322
            PR tree-optimization/114074
            * tree-chrec.cc (chrec_fold_multiply): Restrict the use of
            unsigned arithmetic when actual overflow on constant operands
            is observed.

            * gcc.dg/pr68317.c: Revert last change.=