[Bug tree-optimization/93946] Bogus redundant store removal

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93946

--- Comment #21 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:dd9ca9d770a18ce4b16d867f49fef3293b483ff5

commit r10-7635-gdd9ca9d770a18ce4b16d867f49fef3293b483ff5
Author: Richard Biener <rguenther@suse.de>
Date:   Wed Apr 8 14:04:35 2020 +0200

    rtl-optimization/93946 - fix TBAA for redundant store removal in CSE

    It turns out RTL CSE tries to remove redundant stores but fails to
    do the usual validity check what such a change is TBAA neutral to
    later loads.

    This now triggers with the PR93946 testcases on nios2.

    2020-04-08  Richard Biener  <rguenther@suse.de>

            PR rtl-optimization/93946
            * cse.c (cse_insn): Record the tabled expression in
            src_related.  Verify a redundant store removal is valid.