[Bug c/67090] [5/6 Regression] O2/O3 optimizes values away when different type pointers are typecasted

[davispuh at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67090

--- Comment #1 from Dāvis <davispuh at gmail dot com> ---
Created attachment 36105
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36105&action=edit
Testcase