https://gcc.gnu.org/bugzilla/show_bug.cgi?id=72855
--- Comment #11 from rguenther at suse dot de <rguenther at suse dot de> --- On Wed, 10 Aug 2016, wschmidt at gcc dot gnu.org wrote: > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=72855 > > --- Comment #10 from Bill Schmidt <wschmidt at gcc dot gnu.org> --- > Some experiments on trunk: > > - Using Bin's patch, I see compile time reduced to ~14 minutes. > - Using Richi's patch, I see compile time reduced to ~9 minutes. > > So both are quite helpful compared to somewhere around 2 hours. > > I'll plan to implement the pre-approved patch, but first I want to try to dig > into why flag_checking appears to have an unexpected value. Yes, that's very much appreciated. As the issue also appears on older branches w/o flag_checking there may be a stray memory write to df->changeable_flags somewhere? As it is a global maybe put a watchpoint to it ...
