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Subject: [Bug tree-optimization/98544] [11 regression] Wrong code generated
 by tree vectorizer since r11-3917-g28290cb50c7dbf87
Date: Fri, 08 Jan 2021 13:09:18 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98544

--- Comment #20 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:bdcde1504502719504a7a63ab10059e171694dc2

commit r11-6549-gbdcde1504502719504a7a63ab10059e171694dc2
Author: Richard Biener <rguenther@suse.de>
Date:   Fri Jan 8 13:17:18 2021 +0100

    tree-optimization/98544 - more permute optimization fixes

    Permute nodes are not transparent to the permute of their children.
    Instead we have to materialize child permutes always and in future
    may treat permute nodes as the source of arbitrary permutes as
    we can permute the lane permutation vector at will (as the target
    supports in the end).

    2021-01-08  Richard Biener  <rguenther@suse.de>

            PR tree-optimization/98544
            * tree-vect-slp.c (vect_optimize_slp): Always materialize
            permutes at a permute node.

            * gcc.dg/vect/bb-slp-pr98544.c: New testcase.=