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Subject: [Bug tree-optimization/101207] [12 Regression]
 gcc.dg/vect/vect-strided-*-mult.c fails after SLP improvements
Date: Mon, 28 Jun 2021 08:35:04 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D101207

--- Comment #8 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:2ad71efb5de9e929ffd2b8ce0a37c3c34021c0f1

commit r12-1837-g2ad71efb5de9e929ffd2b8ce0a37c3c34021c0f1
Author: Richard Biener <rguenther@suse.de>
Date:   Mon Jun 28 09:42:58 2021 +0200

    tree-optimization/101207 - fix BB reduc permute elide with life stmts

    This fixes breakage of live lane extracts from permuted loads we elide
    from BB reduction vectorization by handling the un-permuting the same
    as in the regular eliding code - apply the reverse permute to
    both the scalar stmts and the load permutation.

    2021-06-28  Richard Biener  <rguenther@suse.de>

            PR tree-optimization/101207
            * tree-vect-slp.c (vect_optimize_slp): Do BB reduction
            permute eliding for load permutations properly.

            * gcc.dg/vect/bb-slp-pr101207.c: New testcase.=