[Bug tree-optimization/121202] [15 Regression] ICE on valid code at -O3 with -fno-tree-copy-prop on x86_64-linux-gnu: in vect_schedule_slp_node, at tree-vect-slp.cc:11381

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121202

--- Comment #6 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:4d0c17354e42d57d3f94a7b66ab59299b076ee68

commit r15-10061-g4d0c17354e42d57d3f94a7b66ab59299b076ee68
Author: Richard Biener <rguent...@suse.de>
Date:   Tue Jul 22 13:02:03 2025 +0200

    tree-optimization/121202 - fix vector stmt placement

    When we have a vector shift with a scalar the shift operand can be
    external - in that case we should not use the shift operand def
    as hint where to place the vector shift instruction.  The ICE
    in the PR is because stmt dominance queries only work inside of
    the vector region.  But we should also never place stmts outside
    of it.

            PR tree-optimization/121202
            * tree-vect-slp.cc (vect_schedule_slp_node): Do not take
            an out-of-region stmt as "last".

            * gcc.dg/pr121202.c: New testcase.

    (cherry picked from commit bdfb5cc5aa6959a6959fc0cf98da08db89c81032)