[Bug tree-optimization/120341] [12/13/14/15 Regregression] wrong code at -O1 and above with "-fallow-store-data-races" on x86_64-linux-gnu

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120341

--- Comment #7 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-15 branch has been updated by Richard Biener
<rgue...@gcc.gnu.org>:

https://gcc.gnu.org/g:09884fa0f90da67915245622254cdfb947b87d37

commit r15-9786-g09884fa0f90da67915245622254cdfb947b87d37
Author: Richard Biener <rguent...@suse.de>
Date:   Fri May 30 13:47:55 2025 +0200

    tree-optimization/120341 - stores into STRING_CSTs can trap

    The following fixes conditional store elimination and store motion
    so they consider stores to STRING_CSTs as trapping.

            PR tree-optimization/120341
            * tree-ssa-loop-im.cc (can_sm_ref_p): STRING_CSTs are readonly.
            * tree-ssa-phiopt.cc (cond_store_replacement): Likewise.

            * gcc.dg/torture/pr120341-1.c: New testcase.
            * gcc.dg/torture/pr120341-2.c: Likewise.

    (cherry picked from commit 02c58bc4b0885f5b6f50033da35768ebe6c4a030)