[Bug c++/80561] Missed optimization: std::array data is aligned if array is aligned

[jzwinck at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80561

--- Comment #3 from John Zwinck <jzwinck at gmail dot com> ---
I'm aware of the workaround using __builtin_assume_aligned() - you can see I
formulated an equivalent but pure C++ workaround using alignas() in the
aforementioned Stack Overflow post.  But 99% of users won't know to do that, so
will pay a runtime cost for a C++ abstraction which is supposed to be free.