[Bug tree-optimization/77862] [7 Regression] ice in add_equivalence

[kugan at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77862

--- Comment #4 from kugan at gcc dot gnu.org ---
patch posted for review at:
https://gcc.gnu.org/ml/gcc-patches/2016-10/msg00349.html