[Bug tree-optimization/98909] Failure to optimize odd loop pattern

[gabravier at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98909

--- Comment #1 from Gabriel Ravier <gabravier at gmail dot com> ---
PS: The same pattern with `unsigned` replacing `int` can be optimized to
`return x & 1;` (done by LLVM, but not by GCC).