[Bug tree-optimization/83026] missing strlen optimization for strcmp of unequal strings

[qing.zhao at oracle dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83026

--- Comment #4 from Qing Zhao <qing.zhao at oracle dot com> ---
Note, this optimization is only valid when the result of the strcmp is used to
compare with zero.