[Bug c++/71946] FD_ZERO macro parsing error in lambda function.

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71946

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Yep

# if __WORDSIZE == 64
#  define __FD_ZERO_STOS "stosq"
# else
#  define __FD_ZERO_STOS "stosl"
# endif

# define __FD_ZERO(fdsp) \
  do {                                                                        \
    int __d0, __d1;                                                           \
    __asm__ __volatile__ ("cld; rep; " __FD_ZERO_STOS                         \
                          : "=c" (__d0), "=D" (__d1)                          \
                          : "a" (0), "0" (sizeof (fd_set)                     \
                                          / sizeof (__fd_mask)),              \
                            "1" (&__FDS_BITS (fdsp)[0])                       \
                          : "memory");                                        \
  } while (0)


Reducing now ...