[Bug middle-end/69553] [6 Regression] Optimizations O1/O2 makes std::array value incorrect when passed to function

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69553

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
  foo (_13, _11);
  _9 = &MEM[(const int[2] &)t_2(D) + 8][1];
  foo (_11, _9); [tail call]

Trying to reduce the issue.

(In reply to Markus Trippelsdorf from comment #2)
> Started with r229265:
> 
> commit 2425f3b6ce0532030e1e4274d0fc82a5d7e16c79
> Author: hubicka <hubicka@138bc75d-0d04-0410-961f-82ee72b054a4>
> Date:   Fri Oct 23 18:05:55 2015 +0000
> 
>         * fold-const.c (operand_equal_p): Do not compare TYPE_MODE when
>         comparing addresses.

I think this just exposed the issue somewhere else.