--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/pr29521.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,15 @@
+/* PR 29521 : warning for return with expression in function returning void */
+/* { dg-do compile } */
+/* { dg-options "" } */
+
+void func (void) { }
+
+void func2 (void)
+{
+  return func ();
+}
+
+void func3 (void)
+{
+  return 1;  /* { dg-warning "'return' with a value" } */
+}