[Bug rtl-optimization/57308] [4.9 Regression] DF_REF_REAL_LOC segfault in web.c:union_match_dups

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57308

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I think this is a dup of bug 57304.