[Bug middle-end/35587] -Warray-bounds does not work at all or does not find all trivial cases, and :works only with -O2 or -O3

[levon at movementarian dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=35587

--- Comment #11 from John Levon <levon at movementarian dot org> ---
Ugh, and in fact, the sanitize option isn't even enough for the real-life code
that we hit this with.