https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83072
--- Comment #4 from rguenther at suse dot de <rguenther at suse dot de> --- On Tue, 21 Nov 2017, glisse at gcc dot gnu.org wrote: > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83072 > > --- Comment #3 from Marc Glisse <glisse at gcc dot gnu.org> --- > (In reply to Richard Biener from comment #2) > > The issue is that when EVRP records value-ranges that only hold temporarily > > it doesn't update SSA_NAME_RANGE_INFO but only the internal lattice while > > if the range is determined at the SSA definition point it also updates > > SSA_NAME_RANGE_INFO. > > Seems obvious now you've said it... And VRP1, which would have a separate > SSA_NAME, does not generally call into match-simplify yet. > > I wonder if we'll take the ugly route of making the EVRP lattice global, and > having get_range_info use it if it isn't empty (or checking some flag) and > fall > back to the current behavior otherwise. Seems simpler and cheaper than the > alternatives I am trying to think about. Once Jeff is settlet with his re-orgs I'm going to simply temporarily adjust SSA_NAME_RANGE_INFO. Should be a very simple thing do to.
