[Bug libstdc++/114821] _M_realloc_append should use memcpy instead of loop to copy data when possible

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114821

--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #7)
> Created attachment 58014 [details]
> Make std::pair relocatable and simplify __relocate_a
> 
> Does this help?

Oh hang on, that patch is wrong. I'll fix it and check the results myself ...