* tree-cfgcleanup.c (want_merge_blocks_p): New function.
        (cleanup_tree_cfg_bb): Use it.
	* profile-count.h (profile_count::of_for_merging, profile_count::merge):
	New functions.
	* tree-cfg.c (gimple_merge_blocks): Use profile_count::merge.

From-SVN: r249907