2012-09-24  Richard Guenther  <rguenther@suse.de>

	PR middle-end/52173
	* gimple.c (gimple_copy): Properly mark the copy modified
	if SSA operands are present.

	* gcc.dg/tm/pr52173-1.c: New.
	* gcc.dg/tm/pr52173-2.c: New.

From-SVN: r191658