[Bug target/81647] inconsistent LTGT behavior at different optimization levels on AArch64.

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81647

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
__builtin_islessgreater  should never set or raise an "fp" exception. 
Interesting the vectorized version does ...