predict.c (propagate_unlikely_bbs_forward): Break out from ...

predict.c (propagate_unlikely_bbs_forward): Break out from ...

	* predict.c (propagate_unlikely_bbs_forward): Break out from ...
	(determine_unlikely_bbs): ... here.
	* predict.h (propagate_unlikely_bbs_forward): Declare.
	* cfgexpand.c (pass_expand::execute): Use it.
	* bb-reorder.c (sanitize_hot_paths): Do not consider known to be
	unlikely edges.
	(find_rarely_executed_basic_blocks_and_crossing_edges): Use
	propagate_unlikely_bbs_forward.

From-SVN: r250360