PR tree-optimization/58380
	* tree-ssa-threadupdate.c (thread_block): Recognize another case
	of threading through a buried loop header.

	* tree-ssa-threadedge.c (thread_around_empty_blocks): Correct
	return value for single successor case.

	* g++.dg/torture/pr58380.C: New test.

2013-09-10  Jeff Law  <law@redhat.com>

From-SVN: r202489