tree-ssa-structalias.c: Remove edge weights in favor of just processing them as complex constraints.

2006-11-22  Daniel Berlin  <dberlin@dberlin.org>

	* tree-ssa-structalias.c: Remove edge weights in favor of just
	processing them as complex constraints.
	(struct constraint_graph): Remove weighted succs and preds. Rename
	nonweighted succs and preds.
	(constraint_edge): Removed.
	(constraint_edge_t): Ditto.
	(constraint_edge_pool): Ditto.
	(new_constraint_edge): Ditto.
	(constraint_edge_equal): Ditto.
	(constraint_edge_less): Ditto.
	(constraint_edge_vec_find): Ditto.
	(erase_self_graph_edge): Ditto.
	(add_graph_edge): Removed.
	(get_graph_weights): Ditto.
	(allocate_graph_weights): Ditto.	(
	(valid_weighted_graph_edge): Ditto
	(bitmap_other_than_zero_bit_set): Ditto.
	(int_add_graph_edge): Renamed to add_graph_edge.
	(clear_edges_for_node): Remove support for weighted edges.
	(merge_graph_nodes): Ditto.
	(valid_graph_edge): Ditto.
	(build_constraint_graph): Ditto.
	(scc_visit): Ditto.
	(collapse_nodes): Ditto.
	(process_unification_queue): Ditto.
	(topo_visit): Ditto.
	(do_ds_constraint): Ditto.
	(perform_var_subsitution): Ditto.
	(solve_graph): Ditto.
	(init_alias_vars): Ditto.
	(delete_points_to_sets): Ditto.
	(do_complex_constraint): Support offsetted copies here.

From-SVN: r119114