re PR middle-end/24912 (m68k build failure: ICE: in reload_cse_simplify_operands)

	PR middle-end/24912
	PR middle-end/24750
	* reload.c (find_reloads_address_1): Mention dependency on
	gen_reload.
	* reload1.c (gen_reload): For IN with an unary operation, try
	moving inner expression to OUT if trivial SET is not valid.
	Confirm that the result is valid.  Move common code block into...
	(emit_insn_if_valid_for_reload): New function.

From-SVN: r107231