[Bug tree-optimization/100923] [9/10/11/12 Regression] wrong code at -O2 and above on x86_64-linux-gnu

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100923

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
So FRE thinks:
  *e.2_6 = f.3_7;

Does not modify:

  _9 = *l.1_4;