https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114597
--- Comment #5 from wierton <141242068 at smail dot nju.edu.cn> ---
(In reply to Xi Ruoyao from comment #4)
> I believe the second form is still incorrect and it just works by luck. To
> ensure it work you have to do:
>
> asm("mov %1,%0":"=r"(n.p):"r"(n.p));
>
> Or
>
> asm("":"+r"(n.p));
>
> Not so sure about the third form.
Thank you for your explanation, it helps me a lot :).
