https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123962
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to Jeffrey A. Law from comment #2) > I'm not sure that's necessarily wise. One of things I was looking at with > Austin a month or so ago was a whole slew of missed bitfield optimizations > because we *don't* use BIT_FIELD_REF enough in gimple. Yes I agree with that we don't use BFR enough but lower it early is a problem for many reasons including things like this. I Know Richard B. had some comments on this before about lowering it and he mentioned something about ifcombine doing it now. I can't find that at this point though.
