[Bug tree-optimization/112281] [12/13/14 Regression] wrong code at -O3 on x86_64-linux-gnu since r12-2097-g9f34b780b0461e

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112281

--- Comment #11 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:3b34902417259031823bff7f853f615a60464bbd

commit r14-5626-g3b34902417259031823bff7f853f615a60464bbd
Author: Richard Biener <rguenther@suse.de>
Date:   Mon Nov 20 13:39:52 2023 +0100

    tree-optimization/112281 - loop distribution and zero dependence distances

    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 = 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 = in the
            innermost common loop record a partition conflict.

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