Begin cleaning up jump.c

	Begin cleaning up jump.c
	* jump.c (init_label_info, delete_barrier_successors,
	mark_all_labels, delete_unreferenced_labels,
	delete_noop_moves, calculate_can_reach_end): New functions broken
	out of jump_optimize.
	(jump_optimize): Use them.

From-SVN: r23539

gcc/ChangeLog

+Thu Nov  5 07:59:05 1998  David S. Miller  <davem@pierdol.cobaltmicro.com>
+
+	* jump.c (init_label_info, delete_barrier_successors,
+	mark_all_labels, delete_unreferenced_labels,
+	delete_noop_moves, calculate_can_reach_end): New functions broken
+	out of jump_optimize.
+	(jump_optimize): Use them.
+
 Thu Nov  5 07:57:45 EST 1998  Andrew MacLeod  <amacleod@cygnus.com>
 
 	* except.c (expand_fixup_region_end): Make sure outer context labels