gcc/cp/ChangeLog:

	PR c++/70590
	PR c++/70452
	* constexpr.c (cxx_eval_outermost_expression): Call unshare_expr
	on the result if it's not a CONSTRUCTOR.

gcc/testsuite/ChangeLog:

	PR c++/70590
	PR c++/70452
	* g++.dg/pr70590.C: New test.
	* g++.dg/pr70590-2.C: New test.

From-SVN: r234837