[Bug tree-optimization/122023] [16 regression] ice in vect_build_slp_tree_2

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122023

--- Comment #2 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:32a8a1c26bd0bf340ab4a5138b694d4102290a2e

commit r16-4019-g32a8a1c26bd0bf340ab4a5138b694d4102290a2e
Author: Richard Biener <rguent...@suse.de>
Date:   Mon Sep 22 09:41:05 2025 +0200

    tree-optimization/122023 - rotate pattern with reductions

    The following disables the use of rotate patterns with reductions
    since it breaks then single rotate SSA use-def chain constraints.

            PR tree-optimization/122023
            * tree-vect-patterns.cc (vect_recog_rotate_pattern): Disable
            for rotates.

            * gcc.dg/vect/pr122023.c: New testcase.