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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/106722] bogus uninit warning in
 tree-vect-loop-manip.cc
Date: Fri, 09 Sep 2022 12:32:37 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106722

--- Comment #7 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:a8b0b13da7379feb31950a9d2ad74b98a29c547f

commit r13-2560-ga8b0b13da7379feb31950a9d2ad74b98a29c547f
Author: Richard Biener <rguenther@suse.de>
Date:   Fri Sep 9 12:06:38 2022 +0200

    tree-optimization/106722 - avoid invalid pointer association in predcom

    When predictive commoning builds a reference for iteration N it
    prematurely associates a constant offset into the MEM_REF offset
    operand which can be invalid if the base pointer then points
    outside of an object which alias-analysis does not consider valid.

            PR tree-optimization/106722
            * tree-predcom.cc (ref_at_iteration): Do not associate the
            constant part of the offset into the MEM_REF offset
            operand, across a non-zero offset.

            * gcc.dg/torture/pr106892.c: New testcase.=