[Bug tree-optimization/101590] (len & - N) <= len is not optimized to 1

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101590

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
it doesn't even have to be -N, any unsigned & N <= unsigned