[Bug c++/78180] Poor optimization of std::array on gcc 4.8/5.4/6.2 as compared to simple raw array

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78180

--- Comment #4 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Created attachment 39942
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=39942&action=edit
unreduced testcase