[Bug tree-optimization/101291] [10 Regression] turns infinite loop into finite

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101291

--- Comment #13 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-10 branch has been updated by Richard Biener
<rguenth@gcc.gnu.org>:

https://gcc.gnu.org/g:1a4075c0a43fff9fac9df91c3e83e3a1949b69ff

commit r10-10098-g1a4075c0a43fff9fac9df91c3e83e3a1949b69ff
Author: Richard Biener <rguenther@suse.de>
Date:   Mon Jul 5 11:53:07 2021 +0200

    middle-end/101291 - set loop copy of versioned loop

    This fixes the vectorizer loop versioning code failing to clear
    niter related info on the scalar loop as it assumed get_loop_copy
    would work even for the outermost loop.  The patch makes that
    assumption hold by adjusting the loop versioning code.

    2021-07-05  Richard Biener  <rguenther@suse.de>

            PR middle-end/101291
            * cfgloopmanip.c (loop_version): Set the loop copy of the
            versioned loop to the new loop.

    (cherry picked from commit 38872c6c0db1b10b17d3913b277c499913208d0b)