[Bug tree-optimization/92716] -Os doesn't inline byteswap function even though it's a single instruction

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92716

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Probably similar cases can be made for loops implementing memcpy/memcmp (what
we pattern-detect in loop distribution).