http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60336
--- Comment #18 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to Uroš Bizjak from comment #17)
> classify_argument has an early exit:
>
> /* Zero sized arrays or structures are NO_CLASS. We return 0 to
> signalize memory class, so handle it as special case. */
>
> if (!words)
> {
> classes[0] = X86_64_NO_CLASS;
> return 1;
> }
>
> but it doesn't trigger for c++, where words gets calculated as 1.
Yes, it looks like this special case is in order to return the same thing that
C++ does through the normal logic: normally we return 'words', and since there
are no fields classes[0] is still initialized to NO_CLASS.
