https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118316
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #1)
> It comes down to optimizing:
> ```
> unsigned f(unsigned len)
> {
> if (len > 1)
> len &= 1;
> return len;
> }
> ```
Interesting clang is able to optimize the above but not the loop.
