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

[amker at gcc dot gnu.org]

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

--- Comment #1 from amker at gcc dot gnu.org ---
According to thread https://gcc.gnu.org/ml/gcc-patches/2015-02/msg00583.html
it's still not clear if LTGT should be quite or singaling, but inconsistent
behavior seems not correct here.