--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/coroutines/torture/co-await-14-return-ref-to-auto.C	Thu Feb 13 11:34:05 2020 +0900
@@ -0,0 +1,45 @@
+//  { dg-do run }
+
+/* The simplest valued co_await we can do.  */
+
+#include "../coro.h"
+
+// boiler-plate for tests of codegen
+#include "../coro1-ret-int-yield-int.h"
+
+
+coro1
+f ()
+{
+  int t1 = 5;
+  int t2 = 5;
+  auto gX = co_await coro1::suspend_always_intrefprt{t1};
+  if (gX != t1)
+	  abort();
+  decltype(auto) gX1 = co_await coro1::suspend_always_intrefprt{t2};
+  if (&gX1 != &t2)
+	  abort();
+  co_return t1 + 10;
+}
+
+int main ()
+{
+  PRINT ("main: create coro1");
+  struct coro1 f_coro = f ();
+  if (f_coro.handle.done())
+    {
+      PRINT ("main: we should not be 'done' [1]");
+      abort ();
+    }
+  PRINT ("main: resuming [1] initial suspend");
+  while (!f_coro.handle.done())
+    f_coro.handle.resume();
+  /* we should now have returned with the co_return (15) */
+  if (!f_coro.handle.done())
+    {
+      PRINT ("main: we should be 'done' ");
+      abort ();
+    }
+  puts ("main: done");
+  return 0;
+}