[Bug tree-optimization/115278] [13/14/15 Regression] -ftree-vectorize optimizes away volatile write on x86_64 since r13-3219

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115278

--- Comment #9 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Richard Biener <rgue...@gcc.gnu.org>:

https://gcc.gnu.org/g:65dbe0ab7cdaf2aa84b09a74e594f0faacf1945c

commit r15-941-g65dbe0ab7cdaf2aa84b09a74e594f0faacf1945c
Author: Richard Biener <rguent...@suse.de>
Date:   Fri May 31 10:14:25 2024 +0200

    tree-optimization/115278 - fix DSE in if-conversion wrt volatiles

    The following adds the missing guard for volatile stores to the
    embedded DSE in the loop if-conversion pass.

            PR tree-optimization/115278
            * tree-if-conv.cc (ifcvt_local_dce): Do not DSE volatile stores.

            * g++.dg/vect/pr115278.cc: New testcase.