[Bug tree-optimization/128314] wrong code at -O1 and above: an overflowing __builtin___memcpy_chk into an unused local array is removed instead of aborting

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=128314

--- Comment #1 from Drea Pinski <pinskia at gcc dot gnu.org> ---
I think this is by design.  There was another bug that mentioned this exact
thing and was closed as invalid (or maybe won't fix).