[Bug tree-optimization/82703] Wrong addition of std::array components with -O2 -ftree-loop-vectorize -ftree-slp-vectorize (works fine with -O2)

[frederic.bron at m4x dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82703

--- Comment #1 from Frédéric Bron <frederic.bron at m4x dot org> ---
Created attachment 42464
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42464&action=edit
save-temps for g++ 7.2.1