[Bug tree-optimization/109791] -Wstringop-overflow warning with -O3 and _GLIBCXX_USE_CXX11_ABI=0

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109791

--- Comment #16 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #15)
> Created attachment 55155 [details]
> patch unfolding such PHIs
> 
> Updated PHI unfolding patch.  Tests fine besides mentioned diagnostic
> regressions.

I was looking into doing the opposite in forwprop but maybe I can skip
addresses.