--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/c-c++-common/Wimplicit-fallthrough-29.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,33 @@
+/* { dg-do compile } */
+/* { dg-options "-Wimplicit-fallthrough=3" } */
+
+void bar (int);
+
+void
+foo (int i)
+{
+  switch (i)
+    {
+    case 1:			/* { dg-warning "this statement may \[fla\]* through" "" { target *-*-* } .+1 } */
+      bar (1);
+    case 2:			/* { dg-warning "this statement may \[fla\]* through" "" { target *-*-* } .+1 } */
+      bar (2);
+      /* Some comment.  */
+    case 3:			/* { dg-warning "this statement may \[fla\]* through" "" { target *-*-* } .+1 } */
+      bar (3);
+      /* Here we really do want to fALl   tHRoUgh and we mean it!  */
+    case 4:			/* { dg-bogus "this statement may \[fla\]* through" "" { target *-*-* } .+1 } */
+      bar (4);
+      /* Intentionally fall through.  */
+    case 5:			/* { dg-bogus "this statement may \[fla\]* through" "" { target *-*-* } .+1 } */
+      bar (5);
+      /* FALLTHROUGH */
+    case 6:			/* { dg-bogus "this statement may \[fla\]* through" "" { target *-*-* } .+1 } */
+      bar (6);
+      __attribute__((fallthrough));
+    case 7:			/* { dg-bogus "this statement may \[fla\]* through" "" { target *-*-* } .+1 } */
+      bar (7);
+    default:
+      break;
+    }
+}