[Bug tree-optimization/121589] wrong code at -O1 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=121589

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I think this has undefined code in it.

e will point to one before c[0] which is undefined.