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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/107699] [12/13 Regression] False positive -Warray-bounds, non-existent offset reported by GCC
Date: Thu, 08 Dec 2022 10:58:56 +0000	[thread overview]
Message-ID: <bug-107699-4-U6E0cunYQF@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-107699-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107699

--- Comment #9 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:892e8c520be37d0a0f14e2ae375103c5303ed549

commit r13-4555-g892e8c520be37d0a0f14e2ae375103c5303ed549
Author: Richard Biener <rguenther@suse.de>
Date:   Thu Dec 8 09:07:36 2022 +0100

    tree-optimization/107699 - missed &data._M_elems + _1 != &data._M_elems
folding

    The following addresses a missed folding noticed in PR107699 that can
    be fixed amending the existing &x + a != &x + b pattern to also handle
    the case of only one side having a pointer plus.  I'm moving the
    patterns next to related simpifications showing there'd be an existing
    pattern matching this if it were not gated with an explicit single_use
    constraint.  Note the new pattern also handles &x.a + a != &x.b, but
    this hints at some unification / generalization opportunities here.

            PR tree-optimization/107699
            * match.pd (&a !=/== &a.b + c -> (&a - &a.b) !=/== c): New
            pattern variant.

            * gcc.dg/tree-ssa/pr107699.c: New testcase.

  parent reply	other threads:[~2022-12-08 10:58 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-11-15 14:10 [Bug c++/107699] New: " carlosgalvezp at gmail dot com
2022-11-16 13:34 ` [Bug tree-optimization/107699] " rguenth at gcc dot gnu.org
2022-11-16 13:34 ` [Bug tree-optimization/107699] 12/13 Regression] " rguenth at gcc dot gnu.org
2022-11-16 14:54 ` [Bug tree-optimization/107699] [12/13 " carlosgalvezp at gmail dot com
2022-11-23  3:00 ` hp at gcc dot gnu.org
2022-11-29 13:22 ` rguenth at gcc dot gnu.org
2022-11-29 13:41 ` carlosgalvezp at gmail dot com
2022-11-29 13:46 ` carlosgalvezp at gmail dot com
2022-11-29 17:54 ` rguenther at suse dot de
2022-11-29 17:58 ` carlosgalvezp at gmail dot com
2022-12-08 10:58 ` cvs-commit at gcc dot gnu.org [this message]
2022-12-08 10:59 ` rguenth at gcc dot gnu.org
2023-02-16 10:37 ` carlosgalvezp at gmail dot com
2023-05-08 12:26 ` [Bug tree-optimization/107699] [12/13/14 " rguenth at gcc dot gnu.org
2023-12-15 13:57 ` rguenth at gcc dot gnu.org

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