[Bug tree-optimization/95527] Failure to optimize __builtin_ffs == 0

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95527

--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jakub Jelinek <jakub@gcc.gnu.org>:

https://gcc.gnu.org/g:653ab081391e9e7e38b304f3234323c93693d40c

commit r11-1080-g653ab081391e9e7e38b304f3234323c93693d40c
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Tue Jun 9 08:38:19 2020 +0200

    match.pd: Optimize ffs comparisons against constants [PR95527]

    The following patch implements various optimizations of __builtin_ffs*
    against constants.

    2020-06-09  Jakub Jelinek  <jakub@redhat.com>

            PR tree-optimization/95527
            * match.pd (__builtin_ffs (X) cmp CST): New optimizations.

            * gcc.dg/tree-ssa/pr95527.c: New test.