* gcse.c (remove_reachable_equiv_notes): New.
	(replace_store_insn): Call it.  Update antic list.
	(store_killed_in_insn): Take REG_EQUAL notes into account.
	(build_store_vectors, delete_store): Add parameter to
	replace_store_insn call.

Co-Authored-By: Jeff Law <law@redhat.com>

From-SVN: r71412