http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57994
--- Comment #5 from Paolo Carlini <paolo.carlini at oracle dot com> --- Today I was thinking that given that, per docs and testsuite (double checked yesterday) the mpfr functions are able to cope with +-Inf arguments to the mathematical functions and evaluate correctly, gating the various do_mpfr_* with !real_isnan instead of real_isfinite doesn't look like taking a big risk, now that we are in Stage 1. Alone that would help a lot of code (in particular, in the C++ library, which is the original motivating example). Note, I'm not thinking replacing real_isfinite in various other places, in particular not in do_mpc_* and its helpers (something for the future). Comments?