[Bug tree-optimization/119586] [15 Regression] wrong code at -O2 with "-ftree-loop-vectorize -fno-inline" on x86_64-linux-gnu since r15-8047

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119586

--- Comment #5 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:574c59cfe6e29c9e5758988b75c2e7ab6edc37da

commit r15-9149-g574c59cfe6e29c9e5758988b75c2e7ab6edc37da
Author: Richard Biener <rguent...@suse.de>
Date:   Wed Apr 2 13:12:58 2025 +0200

    tree-optimization/119586 - aligned access to unaligned data

    The following reverts parts of r15-8047 which assesses alignment
    analysis for VMAT_STRIDED_SLP is correct by using aligned accesses
    where allowed by it.  As the PR shows this analysis is still incorrect,
    so revert back to assuming we got it wrong.

            PR tree-optimization/119586
            * tree-vect-stmts.cc (vectorizable_load): Assume we got
            alignment analysis for VMAT_STRIDED_SLP wrong.
            (vectorizable_store): Likewise.

            * gcc.dg/vect/pr119586.c: New testcase.