re PR tree-optimization/78348 ([7 REGRESSION] 15% performance drop for...

re PR tree-optimization/78348 ([7 REGRESSION] 15% performance drop for coremark-pro/nnet-test after r242038)

2016-11-16  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/78348
	* tree-loop-distribution.c (enum partition_kind): Add PKIND_MEMMOVE.
	(generate_memcpy_builtin): Honor PKIND_MEMCPY on the partition.
	(classify_partition): Set PKIND_MEMCPY if dependence analysis
	revealed no dependency, PKIND_MEMMOVE otherwise.

	* gcc.dg/tree-ssa/ldist-24.c: New testcase.

From-SVN: r242470