2014-06-26  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/61607
	* tree-ssa-copy.c (copy_prop_visit_phi_node): Adjust comment
	explaining why we restrict copies on loop depth.
	* tree-ssa-dom.c (cprop_operand): Remove restriction on
	on loop depth.
	(record_equivalences_from_phis): Instead add it here.

	* gcc.dg/tree-ssa/ssa-dom-thread-5.c: New testcase.

From-SVN: r212026