--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/coroutines/torture/co-await-00-trivial.C	Thu Feb 13 11:34:05 2020 +0900
@@ -0,0 +1,52 @@
+//  { dg-do run }
+
+// The simplest co_await we can do.
+
+#include "../coro.h"
+
+// boiler-plate for tests of codegen
+#include "../coro1-ret-int-yield-int.h"
+
+int gX = 1;
+
+coro1
+f ()
+{
+  co_await coro1::suspend_always_prt{};
+  co_return gX + 10;
+}
+
+int main ()
+{
+  PRINT ("main: create coro1");
+  struct coro1 f_coro = f ();
+  PRINT ("main: got coro1 - checking gX");
+  if (gX != 1)
+    {
+      PRINTF ("main: gX is wrong : %d, should be 1\n", gX);
+      abort ();
+    }
+  if (f_coro.handle.done())
+    {
+      PRINT ("main: we should not be 'done' [1]");
+      abort ();
+    }
+  PRINT ("main: resuming [1] initial suspend");
+  f_coro.handle.resume();
+  PRINT ("main: resuming [2] co_await");
+  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 ();
+    }
+  int y = f_coro.handle.promise().get_value();
+  if (y != 11)
+    {
+      PRINTF ("main: y is wrong : %d, should be 11\n", y);
+      abort ();
+    }
+  puts ("main: done");
+  return 0;
+}