[Bug tree-optimization/105651] [12/13 Regression] bogus "may overlap" memcpy warning with std::string and operator+ at -O3

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105651

--- Comment #22 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #19)
> I've posted
> https://gcc.gnu.org/pipermail/gcc-patches/2022-July/598896.html
> patch for this, waiting for Jon's review.

N.B. that was committed as r13-2618-g723ef5a937dbab