--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/Wshadow-1.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,32 @@
+/* Copyright (C) 2001 Free Software Foundation, Inc.  */
+
+/* { dg-do compile } */
+/* { dg-options "-Wshadow -pedantic-errors" } */
+
+/* Source: Neil Booth, 5 Dec 2001.  */
+
+int decl1;			/* { dg-message "shadowed declaration" } */
+void foo (double decl1)		/* { dg-warning "shadows a global decl" } */
+{				
+}
+
+void foo1 (int d)		/* { dg-message "note: previous definition" } */
+{
+  double d;	 /* { dg-bogus "warning" "warning in place of error" } */
+  /* { dg-error "redeclared as different" "" { target *-*-* } .-1 } */
+}
+
+void foo2 (int d)		/* { dg-message "shadowed declaration" } */
+{
+  {
+    double d;			/* { dg-warning "shadows a parameter" } */
+  }
+}
+
+void foo3 ()
+{
+  int local;			/* { dg-message "shadowed declaration" } */
+  {
+    int local;			/* { dg-warning "shadows a previous local" } */
+  }
+}