[Bug middle-end/66462] GCC isinf/isnan/... builtins cause sNaN exceptions

[wdijkstr at arm dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66462

--- Comment #1 from Wilco <wdijkstr at arm dot com> ---
Note when this is fixed, GLIBC math/math.h should be updated to enable the
isinf builtins even with -fsignaling-nans.