--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/Wshadow-3.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,21 @@
+/* Test warnings for shadowing in function prototype scope: generally
+   useless but of use if the parameter is used within the scope.  Bug
+   529.  */
+/* Origin: Joseph Myers <joseph@codesourcery.com> */
+/* { dg-do compile } */
+/* { dg-options "-std=gnu89 -Wshadow" } */
+
+int v; /* { dg-message "shadowed declaration" } */
+int f1(int v);
+int f2(int v, int x[v]); /* { dg-warning "declaration of 'v' shadows a global declaration" } */
+int f3(int v, int y[sizeof(v)]); /* { dg-warning "declaration of 'v' shadows a global declaration" } */
+int f4(int v) { return 0; } /* { dg-warning "declaration of 'v' shadows a global declaration" } */
+int f5(int v, int x[v]) { return 0; } /* { dg-warning "declaration of 'v' shadows a global declaration" } */
+int f6(int x) { return 0; }
+int f7(v) int v; { return 0; } /* { dg-warning "declaration of 'v' shadows a global declaration" } */
+int f8(v, w) int v; int w[v]; { return 0; } /* { dg-warning "declaration of 'v' shadows a global declaration" } */
+int f9(x) int x; { return 0; }
+int f10(v) { return 0; } /* { dg-warning "declaration of 'v' shadows a global declaration" } */
+int f11(int a, int b(int a));
+int f12(int a, int b(int a, int x[a])); /* { dg-warning "declaration of 'a' shadows a parameter" } */
+/* { dg-message "shadowed declaration" "outer parm" { target *-*-* } .-1 } */