PR rtl-optimization/64756
	* cse.c (invalidate_dest): New function.
	(cse_insn): Use it.  If dest != SET_DEST (sets[i].rtl) and
	HASH (SET_DEST (sets[i].rtl), mode) computation sets do_not_record,
	invalidate and do not record it.

	* gcc.c-torture/execute/pr64756.c: New test.

From-SVN: r220377