[Bug target/111655] wrong code generated for __builtin_signbit and 0./0. on x86-64 -O2

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111655

--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
What I am trying to say in comment #3 is both GCC and clang's constant folding
is different from what the instruction divsd does in the end.