2004-10-16  Daniel Berlin  <dberlin@dberlin.org>

	Fix PR tree-optimization/17672
	Fix PR tree-optimization/18168

	* lambda-code.c (lambda_lattice_compute_base): Fix reversed
	assert test.
	(gcc_tree_to_linear_expression): Add extra to existing constant.
	(depth_of_nest): Factor out function used in various places.
	(gcc_loop_to_lambda_loop): Clean up code a little bit. No
	functional changes.
	(find_induction_var_from_exit_cond): Stop guessing, and just
	get the right answer :).
	(gcc_loopnest_to_lambda_loopnest): Remove useless pre-allocation.
	Print out message about result of attempt to create perfect nest.
	(lbv_to_gcc_expression): Add type argument, use it to do math
	and induction variable creation.
	(lle_to_gcc_expression): Ditto.
	(lambda_loopnest_to_gcc_loopnest): Create new iv with same type as
	oldiv. Pass type argument to lle_to_gcc_expression and
	lbv_to_gcc_expression.
	Reset number of iterations after transformation.
	(perfect_nestify): Remove useless pre-allocation, and cleanup
	a small amount.

	* tree-data-ref.c (build_classic_dist_vector): Return false for
	dependences completely outside of the loop nest we asked about.
	(build_classic_dir_vector): Ditto.
	(compute_data_dependences_for_loop): Only add dependence relations
	inside the loop we asked about.

	* tree-loop-linear.c (linear_transform_loops): Use DDR_SIZE_VECT.
	Compute immediate uses.

	* tree-optimize.c: Move linear_transform_loops to before ivcanon.

From-SVN: r89945