[Bug tree-optimization/57994] Constant folding of infinity

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57994

--- Comment #10 from Paolo Carlini <paolo.carlini at oracle dot com> ---
About testing, it would be just matter of extending/updating what Kaveh Ghazi
set up when mpfr/mpc came in.