2010-06-11  Sebastian Pop  <sebastian.pop@amd.com>

	PR middle-end/44483
	* tree-if-conv.c (bb_predicate_s): New struct.
	(bb_predicate_p): New.
	(bb_has_predicate): New.
	(bb_predicate): New.
	(set_bb_predicate): New.
	(bb_predicate_gimplified_stmts): New.
	(set_bb_predicate_gimplified_stmts): New.
	(add_bb_predicate_gimplified_stmts): New.
	(init_bb_predicate): New.
	(free_bb_predicate): New.
	(is_predicated): Use bb_predicate.
	(add_to_predicate_list): Use bb_predicate and set_bb_predicate.
	(predicate_bbs): Same.  Gimplify the condition of the basic blocks
	before processing their successors.
	(clean_predicate_lists): Removed.
	(find_phi_replacement_condition): Use bb_predicate.
	(process_phi_nodes): Renamed ifconvert_phi_nodes.  Avoid useless
	computations.
	(insert_gimplified_predicates): New.
	(combine_blocks): Call insert_gimplified_predicates.
	(tree_if_conversion): Call free_bb_predicate instead of
	clean_predicate_lists.

	* gcc.dg/tree-ssa/pr44483.c: New.

From-SVN: r160625