[Bug ipa/122610] [13/14/15/16 regression] Load after store incorrectly deleted with -O2 -fno-strict-aliasing

[lzy20000419 at outlook dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122610

--- Comment #12 from liu zhenyu <lzy20000419 at outlook dot com> ---
Created attachment 62956
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=62956&action=edit
Python script to automate reproduction (catches non-deterministic failures)