make antic_stores a vec<rtx_insn *>
gcc/ChangeLog:
2016-07-06 Trevor Saunders <tbsaunde+gcc@tbsaunde.org>
* store-motion.c (struct st_expr): Make antic_stores a vector.
(st_expr_entry): Adjust.
(free_st_expr_entry): Likewise.
(print_store_motion_mems): Likewise.
(find_moveable_store): Likewise.
(compute_store_table): Likewise.
(remove_reachable_equiv_notes): Likewise.
(replace_store_insn): Likewise.
(build_store_vectors): Likewise.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@238063 138bc75d-0d04-0410-961f-82ee72b054a4