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Subject: [Bug tree-optimization/101242] Segfault in SLP vectorizor after
 g:2ad71efb5de
Date: Tue, 29 Jun 2021 08:35:20 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D101242

--- Comment #7 from CVS 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:c01760bc548ba79bc9ac15168b27fe7aabcb19ae

commit r12-1866-gc01760bc548ba79bc9ac15168b27fe7aabcb19ae
Author: Richard Biener <rguenther@suse.de>
Date:   Tue Jun 29 09:33:24 2021 +0200

    tree-optimization/101242 - fix reverse graph entry detection

    This avoids detecting random unrelated nodes as possible entries
    to not backwards reachable regions of the SLP graph.  Instead
    explicitely add the problematic nodes.

    This temporary XFAILs gcc.dg/vect/pr67790.c until I get the
    permute propagation adjusted to when it needs more than one
    optimistic iteration.

    2021-06-29  Richard Biener  <rguenther@suse.de>

            PR tree-optimization/101242
            * tree-vect-slp.c (vect_slp_build_vertices): Force-add
            PHIs with not represented initial values as leafs.

            * gcc.dg/vect/bb-slp-pr101242.c: New testcase.
            * gcc.dg/vect/pr67790.c: XFAIL scan for zero VEC_PERM_EXPR.=