[Bug c/61447] _Alignof returns incorrect results for some types/archs

[joseph at codesourcery dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61447

--- Comment #7 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
I think _Alignof (expr) should, for example, return the larger alignment 
chosen with _Alignas in the case of a declaration using _Alignas, rather 
than just being based on the type.