[Bug tree-optimization/121049] [16 regression] timezone-data miscompiled with -O3 -march=x86-64-v4 -mtune=znver4 since r16-1729-ga0af6fd825d533

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121049

--- Comment #16 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:bc5570f7ef796fa7f5ab89b34ed9de2be5299f0e

commit r16-2299-gbc5570f7ef796fa7f5ab89b34ed9de2be5299f0e
Author: Richard Biener <rguent...@suse.de>
Date:   Wed Jul 16 15:07:58 2025 +0200

    tree-optimization/121049 - avoid loop masking with even/odd reduction

    The following disables loop masking when we are using an even/odd
    widening operation in a reduction because the loop mask then aligns
    to the wrong elements.

            PR tree-optimization/121049
            * internal-fn.h (widening_evenodd_fn_p): Declare.
            * internal-fn.cc (widening_evenodd_fn_p): New function.
            * tree-vect-stmts.cc (vectorizable_conversion): When using
            an even/odd widening function disable loop masking.

            * gcc.dg/vect/pr121049.c: New testcase.