re PR tree-optimization/21576 (FRE does not eliminate a redundant builtin call.)

re PR tree-optimization/21576 (FRE does not eliminate a redundant builtin call.)

2005-05-15  Daniel Berlin  <dberlin@dberlin.org>

	Fix PR tree-optimization/21576

	* tree-ssa-pre.c (expression_node_pool): New pool.
	(comparison_node_pool): Ditto.
	(list_node_pool): Ditto.
	(pool_copy_list): New function.
	(phi_translate): Handle CALL_EXPR.
	(valid_in_set): Ditto.
	(create_expression_by_pieces): Ditto.
	(insert_into_preds_of_block): Ditto.
	(insert_aux): Ditto.
	(compute_avail): Ditto.
	(create_value_expr_from): Handle TREE_LIST and CALL_EXPR.
	(can_value_number_call): New function.
	(find_leader): Update comment.
	(init_pre): Create new pools.
	(fini_pre): Free new pools.
	(pass_pre): Add TODO_update_ssa for the future when we are going
	to need vops.
	* tree-vn.c (expressions_equal_p): Handle TREE_LIST.
	(set_value_handle): Ditto.
	(get_value_handle): Ditto.

From-SVN: r99759