PR tree-optimization/82574
	* tree-loop-distribution.c (find_single_drs): New parameter.  Check
	that data reference must be executed exactly once per iteration
	against the outermost loop in nest.
	(classify_partition): Update call to above function.

	gcc/testsuite
	* gcc.dg/tree-ssa/pr82574.c: New test.

From-SVN: r253857