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Subject: [Bug tree-optimization/102798] [9/10/11/12 Regression] wrong code
 with -O3 -fno-tree-pta by r9-2475
Date: Mon, 18 Oct 2021 08:26:29 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102798

--- Comment #12 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:a5b1b2a186d94b31a522395e9d02c9cec1b928cb

commit r12-4466-ga5b1b2a186d94b31a522395e9d02c9cec1b928cb
Author: Richard Biener <rguenther@suse.de>
Date:   Mon Oct 18 09:10:43 2021 +0200

    tree-optimization/102798 - avoid copying PTA info to old SSA names

    The vectorizer duplicates pointer-info to created pointer bases
    but it has to avoid changing points-to info on existing SSA names
    because there's now flow-sensitive info in there (pt->pt_null as
    set from VRP).

    2021-10-18  Richard Biener  <rguenther@suse.de>

            PR tree-optimization/102798
            * tree-vect-data-refs.c (vect_create_addr_base_for_vector_ref):
            Only copy points-to info to newly generated SSA names.

            * gcc.dg/pr102798.c: New testcase.=