http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48773
--- Comment #7 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2011-05-04 16:38:54 UTC --- > Can anyone speculate as to which passes consume REG_DEAD notes or is it a case > of trawling the source? invoking df_note_add_problem in the final pass should > resolve the bug I have seen but I expect there are more. The latter. That would be a little surprising at this point.
