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Subject: [Bug tree-optimization/99253] [10/11 Regression] tree-vect-loop
 wrong code
Date: Thu, 25 Feb 2021 09:28:57 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99253

--- Comment #3 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:1193d05465acd39b6e3c7095274d8351a1e2cd44

commit r11-7385-g1193d05465acd39b6e3c7095274d8351a1e2cd44
Author: Richard Biener <rguenther@suse.de>
Date:   Thu Feb 25 09:36:33 2021 +0100

    tree-optimization/99253 - fix reduction path check

    This fixes an ordering problem with verifying that no intermediate
    computations in a reduction path are used outside of the chain.  The
    check was disabled for value-preserving conversions at the tail
    but whether a stmt was a conversion or not was only computed after
    the first use.  The following fixes this by re-ordering things
    accordingly.

    2021-02-25  Richard Biener  <rguenther@suse.de>

            PR tree-optimization/99253
            * tree-vect-loop.c (check_reduction_path): First compute
            code, then verify out-of-loop uses.

            * gcc.dg/vect/pr99253.c: New testcase.=