https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66790
--- Comment #16 from Bernd Schmidt <bernds at gcc dot gnu.org> --- So I think there's three things to solve - which problem should df_live be using, the one it says it's using or the one it actually does - if it's the former, see if passes using the information need fixing - if it's the latter and we need the new problem from this patch, ensure that it actually works correctly (initializing the out bitmaps to all ones, probably).