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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/112281] [12/13 Regression] wrong code at -O3
 on x86_64-linux-gnu since r12-2097-g9f34b780b0461e
Date: Wed, 08 May 2024 11:50:10 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D112281

--- Comment #13 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-13 branch has been updated by Richard Biener
<rguenth@gcc.gnu.org>:

https://gcc.gnu.org/g:0b409fc34e9b1ff7f90456e73128e38970c1532b

commit r13-8720-g0b409fc34e9b1ff7f90456e73128e38970c1532b
Author: Richard Biener <rguenther@suse.de>
Date:   Mon Nov 20 13:39:52 2023 +0100

    tree-optimization/112281 - loop distribution and zero dependence distan=
ces

    The following fixes an omission in dependence testing for loop
    distribution.  When the overall dependence distance is not zero but
    the dependence direction in the innermost common loop is =3D there is
    a conflict between the partitions and we have to merge them.

            PR tree-optimization/112281
            * tree-loop-distribution.cc
            (loop_distribution::pg_add_dependence_edges): For =3D in the
            innermost common loop record a partition conflict.

            * gcc.dg/torture/pr112281-1.c: New testcase.
            * gcc.dg/torture/pr112281-2.c: Likewise.

    (cherry picked from commit 3b34902417259031823bff7f853f615a60464bbd)=