is this an instance of the 16-byte struct bug

[jerro]

On Monday, 4 November 2013 at 22:27:39 UTC, deadalnix wrote:
> OK.
>
> Now usual question to try to understand what is going wrong.
>
> Can you try on 32/64 bits ? Also, what happen with GDC and LDC ?

The code I posted above prints 3ff0000000000000 when built with
dmd on x86_64 without any flags. It prints 0 if I build with LDC
or GDC, or if I build with DMD and add either -O flag or -m32.