[Bug middle-end/66989] poor performance of builtin_isfinite on x64

[neleai at seznam dot cz]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66989

--- Comment #2 from Ondrej Bilka <neleai at seznam dot cz> ---
Created attachment 36050
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36050&action=edit
testing script