[Bug target/124221] ICE in multi-alternative asm with"=X"

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124221

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #1)
> Also you could just use __builtin_parity :
> https://gcc.gnu.org/onlinedocs/gcc-15.2.0/gcc/Bit-Operation-Builtins.
> html#index-_005f_005fbuiltin_005fparity

__builtin_parity  has been around since GCC 4.0.0 even.

But has not been optimized to that sequence until GCC 11.1.0:
r11-1027-gf08995eefbf579 .

Now the error message should be better here.