PR c++/70393
	* varasm.c (output_constructor_regular_field): Flush bitfield
	earlier.  Assert we don't want to move backwards.

	cp/
	* constexpr.c (cxx_eval_store_expression): Keep CONSTRUCTOR
	elements in field order.

	testsuite/
	* g++.dg/cpp0x/constexpr-virtual6.C: New.

From-SVN: r234636