https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61779
--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> --- (In reply to Vittorio Zecca from comment #10) > I just installed gcc-4.9.1 and it still has this bug. > It does not even compile itself (divtf3.c) with -Og. As said it will be fixed in 4.9.2. I've double-checked that -Og bootstrap works on the 4.9 branch head - how did you configure/make?