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Subject: [Bug tree-optimization/97623] [9/10/11 Regression] Extremely slow O2
 compile (>>O(n^2))
Date: Wed, 11 Nov 2020 17:17:52 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D97623

--- Comment #19 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:2e8b368c3d33fd8ddafdd37f8e1b2ba45d1a122e

commit r11-4923-g2e8b368c3d33fd8ddafdd37f8e1b2ba45d1a122e
Author: Richard Biener <rguenther@suse.de>
Date:   Wed Nov 11 18:15:57 2020 +0100

    Fix PRE NEW_SETS guarding

    Accesses to NEW_SETS should be properly guarded.  Committed
    as obvious.

    2020-11-11  Richard Biener  <rguenther@suse.de>

            PR tree-optimization/97623
            * tree-ssa-pre.c (create_expression_by_pieces): Guard
            NEW_SETS access.
            (insert_into_preds_of_block): Likewise.=