tree-predcom.c (filter_suitable_components): Free all refs in act->refs vector before calling release_component.

	* tree-predcom.c (filter_suitable_components): Free all refs in
	act->refs vector before calling release_component.
	(add_ref_to_chain): Free ref if not adding it to chain->refs.

	* tree-data-ref.c (free_subscripts): Free all subscript objects.

	* tree-loop-linear.c (linear_transform_loops): Initialize
	lambda_obstack only after calling perfect_loop_nest_depth.
	Goto free_and_continue instead of just continue for later failures.

From-SVN: r140376