https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71087
Dominique d'Humieres <dominiq at lps dot ens.fr> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |WAITING Last reconfirmed| |2016-05-14 Ever confirmed|0 |1 --- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> --- > This bug only happens on OpteronXXXX with > > XXXX: > - 2354 > - 2382 > - 6136 > > Only those architectures I have available. WORKSFORME on x86_64-apple-darwin15 from 4.8 up to trunk (7.0) with all the options I have tested (a tiny subset). What do you get if you compile with -march=corei7 -mtune=corei7?