--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/coroutines/torture/func-params-07.C	Mon May 25 07:50:57 2020 +0900
@@ -0,0 +1,81 @@
+// { dg-do run }
+
+// Test that we copy simple parms correctly by value, reference or
+// rvalue reference.
+
+#include "../coro.h"
+
+// boiler-plate for tests of codegen
+#include "../coro1-refs-and-ctors.h"
+
+coro1
+my_coro (int v1, int& v2, int&& v3)
+{
+  co_yield v1 + v2 + v3;
+  co_return v1 + v2 + v3;
+}
+
+int main ()
+{
+  PRINT ("main: create coro1");
+  int lv = 1;
+  int lvr = 2;
+  coro1 x = my_coro (lv, lvr, lvr+2);
+
+  if (x.handle.done())
+    abort();
+
+  x.handle.resume();
+  PRINT ("main: after resume (initial suspend)");
+
+  /* Now we should have the co_yielded value.  */
+  int y = x.handle.promise().get_value();
+  if ( y != 7 )
+    {
+      PRINTF ("main: wrong result (%d).", y);
+      abort ();
+    }
+
+  /* So we should be suspended at the yield, now change the
+     values so that we can determine that the reference persists
+     and the copy was made correctly.  */
+  lv = 5; // should be ignored
+  lvr = 3; // should be enacted
+
+  x.handle.resume();
+  PRINT ("main: after resume (yield)");
+
+  /* Now we should have the co_returned value.  */
+  y = x.handle.promise().get_value();
+  if ( y != 8 )
+    {
+      PRINTF ("main: wrong result (%d).", y);
+      abort ();
+    }
+
+  y = x.handle.promise().get_v2();
+  if ( y != 2 )
+    {
+      PRINTF ("main: wrong result 2 (%d).", y);
+      abort ();
+    }
+
+  y = x.handle.promise().get_v3();
+  if ( y != 4 )
+    {
+      PRINTF ("main: wrong result 3 (%d).", y);
+      abort ();
+    }
+
+  if (!x.handle.done())
+    {
+      PRINT ("main: apparently not done...");
+      abort ();
+    }
+
+  x.handle.destroy();
+  x.handle = NULL;
+
+  PRINT ("main: returning");
+  return 0;
+}