https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63156
--- Comment #7 from Steven Bosscher <steven at gcc dot gnu.org> --- (In reply to Carrot from comment #6) > Since it is intentionally to remove flag DF_REF_READ_WRITE on use, Ah, but I don't think that was the correct fix. The DEF and USE refs should both have the flag set.
