--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/cpp1z/decomp-constexpr1.C	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,18 @@
+// Test for reference address comparison in constant expression.
+// { dg-options -std=c++17 }
+
+int i[2];
+struct A { int i, j; } a;
+
+void f()
+{
+  {
+    auto& [ x, y ] = i;
+    static_assert (&x == &i[0]);
+  }
+
+  {
+    auto& [ x, y ] = a;
+    static_assert (&x == &a.i && &y != &a.i);
+  }
+}