[Bug tree-optimization/115959] [15 Regression] rv64gcv ICE: segfault during GIMPLE pass: vect

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115959

--- Comment #3 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:24689b84b8ec0c74c2b9a72ec4fb467069806bda

commit r15-2093-g24689b84b8ec0c74c2b9a72ec4fb467069806bda
Author: Richard Biener <rguenther@suse.de>
Date:   Wed Jul 17 11:42:13 2024 +0200

    tree-optimization/115959 - ICE with SLP condition reduction

    The following fixes how during reduction epilogue generation we
    gather conditional compares for condition reductions, thereby
    following the reduction chain via STMT_VINFO_REDUC_IDX.  The issue
    is that SLP nodes for COND_EXPRs can have either three or four
    children dependent on whether we have legacy GENERIC expressions
    in the transitional pattern GIMPLE for the COND_EXPR condition.

            PR tree-optimization/115959
            * tree-vect-loop.cc (vect_create_epilog_for_reduction):
            Get at the REDUC_IDX child in a safer way for COND_EXPR
            nodes.

            * gcc.dg/vect/pr115959.c: New testcase.