PR rtl-optimization/888846
	* ira.c (process_set_for_memref_referenced_p): New.
	(memref_referenced_p): Add new param.  Use
	process_set_for_memref_referenced_p.  Add new switch cases.
	(memref_used_between_p): Pass new arg to memref_referenced_p.

From-SVN: r268280