[Bug tree-optimization/127195] [17 Regression] ice in flow_bb_inside_loop_p at cfgloop.cc:846

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127195

--- Comment #5 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Richard Biener <rguenth@gcc.gnu.org>:

https://gcc.gnu.org/g:5dde4aa27ecfefcebc0a0d7dfbf336e321ec6ea1

commit r17-3893-g5dde4aa27ecfefcebc0a0d7dfbf336e321ec6ea1
Author: Richard Biener <rguenther@suse.de>
Date:   Thu Sep 3 09:53:19 2026 +0200

    tree-optimization/127195 - ICE with vect_create_constant_vectors

    With excess lanes present we miscount the number of copies of the
    SLP elements which eventually results in ctor_seq stmts not being
    emitted.

            PR tree-optimization/127195
            * tree-vect-slp.cc (vect_create_constant_vectors):
            Properly compute number_of_copies, assert we end up
            on a vector boundary.

            * gcc.dg/vect/vect-pr127195.c: New testcase.