[Bug tree-optimization/116570] Write without read optimization is not applied to custom malloc/free even when marked as such

[uis9936 at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116570

--- Comment #3 from uis <uis9936 at gmail dot com> ---
And there is no way to tell compiler that store is dead without at least
disabling writes to globals?