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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/107561] [13 Regression] g++.dg/pr71488.C  and
 [g++.dg/warn/Warray-bounds-16.C -m32] regression due to -Wstringop-overflow
 problem
Date: Thu, 30 Mar 2023 11:16:14 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107561

--- Comment #25 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:04b0a7b1a6d9e0f3782888f1ebf187c26690038b

commit r13-6943-g04b0a7b1a6d9e0f3782888f1ebf187c26690038b
Author: Richard Biener <rguenther@suse.de>
Date:   Wed Mar 29 13:49:24 2023 +0200

    tree-optimization/107561 - reduce -Wstringop-overflow false positives

    The following tells pointer-query to prefer a zero size when we
    are querying for the size range for a write into an object we've
    determined is of zero size.  That avoids diagnostics about really
    varying size arguments that just get a meaningful range for example
    because they are multiplied by an element size.

    I've adjusted only one call to get_size_range since that's what
    I have a testcase for.

            PR tree-optimization/107561
            * gimple-ssa-warn-access.cc (get_size_range): Add flags
            argument and pass it on.
            (check_access): When querying for the size range pass
            SR_ALLOW_ZERO when the known destination size is zero.

            * g++.dg/pr71488.C: Remove XFAILed bogus diagnostic again.
            * g++.dg/warn/Warray-bounds-16.C: Likewise.=