2015-05-29  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/66314
	* tree-ssa-threadupdate.c (create_block_for_threading): Add
	parameter that says which loop the new block belongs to.
	(ssa_create_duplicates): Blocks duplicated for the threaded
	path belong to the loop of the thread destination.

	* gcc.dg/asan/pr66314.c: New testcase.

From-SVN: r223861