[Bug c++/67064] Register asm variable broken

["pinskia at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67064

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Sebastian Huber from comment #2)
> Indeed -std=gnu++98 gets rid of this error.  So this is working as intended
> for C++11 and later?  This is really nice in combination with defines and
> macros that use ( ) around its content.


>From http://en.cppreference.com/w/cpp/language/decltype :

Note that if the name of an object is parenthesised, it becomes an lvalue
expression, thus decltype(arg) and decltype((arg)) are often different types.


Now I don't know the exact rules for lvalue expression so I don't know if it is
working the correct way or not.