2008-05-08 Vladimir Makarov <vmakarov@redhat.com>

2008-05-08  Vladimir Makarov  <vmakarov@redhat.com>

	* ira-int.h (loop_tree_node): New members subloops and
	subloop_next.

	* ira-conflicts.c (propagate_modified_regnos): Check that it is a
	loop node.
	(ira_build_conflicts): Use TRUE for traverse_loop_tree.

	* ira-color.c (color_pass): Check that it is a
	loop node.  Use subloops and subloop_next for traversing.
	(move_spill_restore): Ditto.
	(coalesced_pseudo_reg_freq_compare,
	coalesced_pseudo_reg_slot_compare, pseudo_reg_compare): Don't
	discard const.

	* ira-lives.c (create_allocno_live_ranges): Use TRUE for
	traverse_loop_tree.

	* ira-emit.c (ira_emit): Ditto.

	* ira-build.c (add_loop_to_tree): Set up subloops and
	subloop_next.
	(setup_loop_tree_level): Use subloops and subloop_next for
	traversing.
	(form_loop_tree): Initialize subloops and subloop_next.
	(traverse_loop_tree): Change 1st parameter semantics.  Rewrite the
	function.
	(create_loop_tree_node_caps): Check that it is a loop node.
	(check_and_add_conflicts): Check allocno loop nodes.
	(add_conflict_with_underlying_allocnos): Use subloops and
	subloop_next for traversing.

	* ira.c (chain_freq_compare, chain_bb_compare): Don't discard
	const.
	(ira): Call regstat functions second time only if new pseudos are
	created.

	* ira-costs.c (find_allocno_class_costs): Use TRUE for
	traverse_loop_tree.
	(setup_allocno_cover_class_and_costs): Ditto.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/ira@135084 138bc75d-0d04-0410-961f-82ee72b054a4