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 198C23857343; Tue,  4 Jul 2023 07:08:15 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 198C23857343
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1688454495;
	bh=HLoCi9thpZ4yF8WsZ5BqUzJ1z5usoqPDXRqE0pmlvKg=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=wqvdYbHELcFIWu6aYnPRVgrHaLsP2wg68+NNM/L/3oy986sqIhPGmly5cukMnC33e
	 TMmT0/4XkOdc2cOvaC3qMNapin0ufXOCe7uSLwcobmdY4dXBhGWEUHwCxu9pN8GOMJ
	 /LD2Ffjt10BImtf/oswWXvSI6L/RMcaZlptH0bes=
From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/110495] fre introduces signed wrap for vector
Date: Tue, 04 Jul 2023 07:08:14 +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: 14.0
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: rguenth at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-110495-4-a6DdAfm8Pa@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-110495-4@http.gcc.gnu.org/bugzilla/>
References: <bug-110495-4@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=3D110495

--- Comment #4 from CVS 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:f703d2fd3f03890a180e8cc04df087c208999e81

commit r14-2282-gf703d2fd3f03890a180e8cc04df087c208999e81
Author: Richard Biener <rguenther@suse.de>
Date:   Mon Jul 3 10:28:10 2023 +0200

    middle-end/110495 - avoid associating constants with (VL) vectors

    When trying to associate (v + INT_MAX) + INT_MAX we are using
    the TREE_OVERFLOW bit to check for correctness.  That isn't
    working for VECTOR_CSTs and it can't in general when one considers
    VL vectors.  It looks like it should work for COMPLEX_CSTs but
    I didn't try to single out _Complex int in this change.

    The following makes sure that for vectors we use the fallback of
    using unsigned arithmetic when associating the above to
    v + (INT_MAX + INT_MAX).

            PR middle-end/110495
            * tree.h (TREE_OVERFLOW): Do not mention VECTOR_CSTs
            since we do not set TREE_OVERFLOW on those since the
            introduction of VL vectors.
            * match.pd (x +- CST +- CST): For VECTOR_CST do not look
            at TREE_OVERFLOW to determine validity of association.

            * gcc.dg/tree-ssa/addadd-2.c: Amend.
            * gcc.dg/tree-ssa/forwprop-27.c: Adjust.=