[Bug c++/108934] bit_cast'ing to long double errors out with "the argument cannot be interpreted" since gcc-12

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108934

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Yes GCC 11.x produces wrong code too, remove constexpr from uint64_x_2_t_to_ld
and temp_uint64_x_2_t_to_ld to see that:
uint64_x_2_t_to_ld:
        .long   1
        .long   0
        .long   0
        .long   0
temp_uint64_x_2_t_to_ld:
        .long   1
        .long   0
        .long   0
        .long   0