[Bug tree-optimization/82103] spurious stringop-overflow warning

[arnd at linaro dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82103

--- Comment #5 from Arnd Bergmann <arnd at linaro dot org> ---
In that case, shouldn't we also warn if the conditional function call in front
of it wasn't there, or without the '__n != 0' check?