re PR tree-optimization/58553 (New fail in PASS->FAIL: gcc.c-torture/execute/memcpy-2.c execution on arm and aarch64)

2013-10-01  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/58553
	* tree-loop-distribution.c (struct partition_s): Add niter member.
	(classify_partition): Populate niter member for the partition
	and properly identify whether the relevant store happens before
	or after the loop exit.
	(generate_memset_builtin): Use niter member from the partition.
	(generate_memcpy_builtin): Likewise.

	* gcc.dg/torture/pr58553.c: New testcase.

From-SVN: r203054