2007-07-11  Daniel Berlin  <dberlin@dberlin.org>

	PR tree-optimization/32663
	
	* tree.h (VALUE_HANDLE_VUSES): Remove.
	(struct tree_value_handle): Remove vuses.

	* tree-vn.c (create_value_handle_for_expr): Don't set
	VALUE_HANDLE_VUSES. 

	* tree-ssa-pre.c (expression_vuses): New.
	(alloc_expression_id): Set up expression_vuses.
	(get_expression_vuses): New.
	(set_expression_vuses): Ditto.
	(clear_expression_ids): Modify for expression_vuses.
	(phi_translate_1): Ditto.
	(phi_translate_set): Ditto.
	(value_dies_in_block_x): Ditto
	(valid_in_sets): Ditto.
	(add_to_sets): Ditto.
	(find_existing_value_expr): Ditto.
	(create_value_handle_for_expr): Ditto.
	(make_values_for_stmt): Ditto.
	(vuse_equiv): Remove.

From-SVN: r126568