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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/108821] [11 Regression] LIM reissuing a
 violatile store when it cannot/should not
Date: Tue, 02 May 2023 13:24:53 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D108821

--- Comment #7 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-11 branch has been updated by Richard Biener
<rguenth@gcc.gnu.org>:

https://gcc.gnu.org/g:bd0192968999661d103bb9d974a8ad3be4ef3d9b

commit r11-10681-gbd0192968999661d103bb9d974a8ad3be4ef3d9b
Author: Richard Biener <rguenther@suse.de>
Date:   Fri Feb 17 12:36:44 2023 +0100

    tree-optimization/108821 - store motion and volatiles

    The following fixes store motion to not re-issue volatile stores
    to preserve TBAA behavior since that will result in the number
    of volatile accesses changing.

            PR tree-optimization/108821
            * tree-ssa-loop-im.c (sm_seq_valid_bb): We can also not
            move volatile accesses.

            * gcc.dg/tree-ssa/ssa-lim-24.c: New testcase.

    (cherry picked from commit 4c4f0f7acd6b96ee744ef598cbea5c7046a33654)=