[Bug tree-optimization/80406] Reduced false positive test case for -Warray-bounds with -O3

[brlcad at mac dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80406

--- Comment #4 from Sean <brlcad at mac dot com> ---
Can confirm the warning no longer appears to issue (at least as of GCC 11).