tree-ssa-threadedge.c (thread_around_empty_block): Remove checks for the number of predecessors and successors allowed.

        * tree-ssa-threadedge.c (thread_around_empty_block): Remove
        checks for the number of predecessors and successors allowed.
        * tree-ssa-threadupdate.c (mark_threaded_blocks): Ignore requests
        which require copying a joiner block if there is a request which
        is a subpath that requires no joiner block copying.

From-SVN: r202054