* tree-loop-distribution.c (classify_partition): New parameter and
	better handle reduction statement.
	(rdg_build_partitions): Revise comment.
	(distribute_loop): Compute statements in all partitions and pass it
	to classify_partition.

	gcc/testsuite
	* gcc.dg/tree-ssa/ldist-26.c: New test.

From-SVN: r249993