[Bug c++/86619] Missed optimization opportunity with array aliasing

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86619

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I Noticed clang, ICC nor MSVC either handle this either.

Note GCC is the only one which handles :

int f(std::array<int, 3> & a, std::array<int, 2> & b)
{
  a[0] = 1;
  b[0] = 1;
  return a[0];
}