http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50416
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> 2011-09-15 10:39:12 UTC --- It works for me with -O1, -Ofast, and -m32 -Ofast. I used x86_64-apple-darwin10 with GMP version 5.0.2, MPFR version 3.0.1, MPC version 0.9 Likely a MPFR (or its use) bug. I suggest to close this pr as invalid.
