2013-03-18  Richard Biener  <rguenther@suse.de>

	PR middle-end/56113
	* domwalk.c (bb_postorder): New global static.
	(cmp_bb_postorder): New function.
	(walk_dominator_tree): Replace scheme imposing an order for
	visiting dominator sons by one sorting them at the time they
	are pushed on the stack.

From-SVN: r196769