[Bug target/123724] [16 Regression] ICE in aarch64_possible_by_lane_insn_p -> vect_stmt_to_vectorize since r16-6497

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123724

--- Comment #6 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jakub Jelinek <jakub@gcc.gnu.org>:

https://gcc.gnu.org/g:3a8faf1e543f60c20d6a02ab815cdc83be94a14b

commit r16-6925-g3a8faf1e543f60c20d6a02ab815cdc83be94a14b
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Tue Jan 20 15:38:24 2026 +0100

    aarch64: Ignore debug stmts in aarch64_possible_by_lane_insn_p [PR123724]

    Like in many other spots, when walking immediate uses for optimization
decisions
    we should just ignore debug stmts.  aarch64_possible_by_lane_insn_p wasn't
    ignoring those and wasted time on doing lookup for those and ICEd because
    it wasn't a vectorizable stmt.

    Fixed by ignoring debug stmts early during the immediate use walk.

    2026-01-20  Jakub Jelinek  <jakub@redhat.com>

            PR target/123724
            * config/aarch64/aarch64.cc (aarch64_possible_by_lane_insn_p):
Ignore
            debug stmts.

            * g++.dg/opt/pr123724.C: New test.