[Bug tree-optimization/120927] [15/16 Regression] 510.parest_r segfaults built with -Ofast -march=znver4 --param vect-partial-vector-usage=1

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120927

--- Comment #5 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:3b599593af17f61fc8cf26ccf1c7e3fd4e83b221

commit r15-9901-g3b599593af17f61fc8cf26ccf1c7e3fd4e83b221
Author: Richard Biener <rguent...@suse.de>
Date:   Wed Jul 2 13:44:59 2025 +0200

    Do not query further vector epilogues after a masked epilogue

    When doing --param vect-partial-vector-usage=1 we'd continue querying
    the target whether it wants more vector epilogues, but when it comes
    back with a suggestion we then might iterate endlessly.  Do not
    even ask the target when we decided for the last epilogue to be
    one with partial vectors.

            PR tree-optimization/120927
            * tree-vect-loop.cc (vect_analyze_loop): Stop querying
            further epilogues after one with partial vectors.

    (cherry picked from commit 57d30924e2b3887a1aedc6102daa67bc3272ace7)