--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/coroutines/torture/co-yield-08-more-refs.C	Thu Feb 13 11:34:05 2020 +0900
@@ -0,0 +1,68 @@
+// { dg-do run }
+
+// Check co_return co_await 
+
+#include "../coro.h"
+
+// boiler-plate for tests of codegen
+#include "../coro1-ret-int-yield-int.h"
+
+/* Tests for .  */
+struct test 
+{
+  auto operator co_await() & noexcept { 
+    return coro1::suspend_always_intprt{};
+  }
+
+  auto operator co_await() && noexcept { 
+    return coro1::suspend_always_longprtsq(3L);
+  }
+};
+
+struct coro1
+f (test thing) noexcept
+{
+  co_yield co_await static_cast<test&&>(thing);
+  co_return 6174;
+}
+
+int main ()
+{
+  PRINT ("main: create coro1");
+
+  struct coro1 x = f (test{});
+  if (x.handle.done())
+    abort();
+
+  PRINT ("main: resuming (initial suspend)");
+  x.handle.resume();
+  PRINT ("main: resuming (await intprt)");
+  x.handle.resume();
+
+  int y = x.handle.promise().get_value();
+  if ( y != 9 )
+    {
+      PRINTF ("main: co-yield gave %d, should be 9\n", y);
+      abort ();
+    }
+
+  PRINT ("main: got coro1 - resuming (co_yield)");
+  if (x.handle.done())
+    abort();
+  x.handle.resume();
+
+  y = x.handle.promise().get_value();
+  if ( y != 6174 )
+    {
+      PRINTF ("main: co-return gave %d, should be 9\n", y);
+      abort ();
+    }
+
+  if (!x.handle.done())
+    {
+      PRINT ("main: apparently not done...");
+      abort ();
+    }
+  PRINT ("main: returning");
+  return 0;
+}