[Bug tree-optimization/86367] FRE1 tree pass deletes code in gcc.target/powerpc/nan128-1.c when long double is IEEE 128

[meissner at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86367

--- Comment #4 from Michael Meissner <meissner at gcc dot gnu.org> ---
If I change the __builtin_nanq calls to __builtin_nanl and the __builtin_nansq
calls to __builtin_nansl when __float128 and long double use the same type, the
test works fine.