* calls.c (stored_args_map): New variable.
	(check_sibcall_argument_overlap_1): New.
	(check_sibcall_argument_overlap): New.
	(expand_call): Initialize stored_args_map.
	Call check_sibcall_argument_overlap.

	* gcc.c-torture/execute/20000707-1.c: New test.

From-SVN: r35017