These tests are currently failing:
----
    version(X86)
        assert(a.classinfo.init.length == 28);
    else version(X86_64)
        assert(a.classinfo.init.length == 36);
    else
        assert(0);
----

----
        version(X86)
        {
            assert(Qwert32.yuiop.offsetof == 8);
            assert(Qwert32.asdfg.offsetof == 12);
        }
        else version (X86_64)
        {
            assert(Qwert32.yuiop.offsetof == 16);
            assert(Qwert32.asdfg.offsetof == 20);
        }
        else
            assert(0);
----

we could of course just add
----
    else version(ARM)
        assert(a.classinfo.init.length == 28);
----
and
----
        else version (ARM)
        {
            assert(Qwert32.yuiop.offsetof == 8);
            assert(Qwert32.asdfg.offsetof == 12);
        }
----

but I wonder whether this should use D_LP64 instead?