https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84757
--- Comment #7 from Vladimir Makarov <vmakarov at gcc dot gnu.org> --- (In reply to Jakub Jelinek from comment #6) > Vlad, is this something that can be still done for GCC 9 or should we defer > to GCC 10? Adding live analysis on subreg level to LRA is a big work and I think such work should be included on stage1 only. May be someone will express a wish to do this work. If not, I'll try to add it to my next year plans.