[Bug tree-optimization/110679] Missed optimization opportunity with countr_zero

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110679

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #2)
> *** Bug 113543 has been marked as a duplicate of this bug. ***

^^ N.B. this has a number of other testcases for the missed optimizations.