--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/coroutines/torture/co-yield-06-fun-parm.C	Thu Feb 13 11:34:05 2020 +0900
@@ -0,0 +1,64 @@
+// { dg-do run }
+
+// Check co_return co_await 
+
+#include "../coro.h"
+
+// boiler-plate for tests of codegen
+#define USE_AWAIT_TRANSFORM
+#include "../coro1-ret-int-yield-int.h"
+
+__attribute__((__noinline__))
+static int
+foo (int x)
+{
+  return x + 2;
+}
+
+/* Function with a single await.  */
+struct coro1
+f () noexcept
+{
+  PRINT ("f: about to yield");
+  co_yield foo (co_await 40);
+
+  PRINT ("f: about to return 6174");
+  co_return 6174;
+}
+
+int main ()
+{
+  PRINT ("main: create coro1");
+  struct coro1 x = f ();
+  if (x.handle.done())
+    abort();
+
+  PRINT ("main: resuming (initial suspend)");
+  x.handle.resume();
+  PRINT ("main: resuming (await intprt)");
+  x.handle.resume();
+
+  PRINT ("main: after resume (2)");
+  int y = x.handle.promise().get_value();
+  if ( y != 42 )
+    abort ();
+  PRINT ("main: apparently got 42");
+
+  PRINT ("main: got coro1 - resuming (co_yield)");
+  if (x.handle.done())
+    abort();
+  x.handle.resume();
+
+  PRINT ("main: after resume (co_yield)");
+  y = x.handle.promise().get_value();
+  if ( y != 6174 )
+    abort ();
+  PRINT ("main: apparently got 6174");
+  if (!x.handle.done())
+    {
+      PRINT ("main: apparently not done...");
+      abort ();
+    }
+  PRINT ("main: returning");
+  return 0;
+}