re PR c++/79825 (Uninitialized uses in aggregate copies of empty structs (missed DCE in C++ gimplify))

2017-03-03  Richard Biener  <rguenther@suse.de>

	PR c++/79825
	* cp-gimplify.c (simple_empty_class_p): Handle EMPTY_CLASS_EXPR.

	* g++.dg/warn/Wuninitialized-8.C: New testcase.

From-SVN: r245866