--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/c-c++-common/Wrestrict-2.c	Thu Oct 25 07:37:49 2018 +0900
@@ -0,0 +1,70 @@
+/* PR 35503 - Warn about restricted pointers
+   Test to exercise that -Wrestrict warnings are issued for memory and
+   sring functions when they are declared in system headers (i.e., not
+   just when they are explicitly declared in the source file.)
+   Also verify that the warnings are issued even for calls where the
+   source of the aliasing violation is in a different function than
+   the restricted call.
+   { dg-do compile }
+   { dg-options "-O2 -Wrestrict" } */
+
+#include <string.h>
+
+static void wrap_memcpy (void *d, const void *s, size_t n)
+{
+  memcpy (d, s, n);   /* { dg-warning "accessing 2 bytes at offsets 0 and 1 overlaps 1 byte at offset 1" "memcpy" } */
+}
+
+void call_memcpy (char *d)
+{
+  const void *s = d + 1;
+  wrap_memcpy (d, s, 2);
+}
+
+
+static void wrap_strcat (char *d, const char *s)
+{
+  strcat (d, s);   /* { dg-warning "source argument is the same as destination" "strcat" } */
+}
+
+void call_strcat (char *d)
+{
+  const char *s = d;
+  wrap_strcat (d, s);
+}
+
+
+static void wrap_strcpy (char *d, const char *s)
+{
+  strcpy (d, s);   /* { dg-warning "source argument is the same as destination" "strcpy" } */
+}
+
+void call_strcpy (char *d)
+{
+  const char *s = d;
+  wrap_strcpy (d, s);
+}
+
+
+static void wrap_strncat (char *d, const char *s, size_t n)
+{
+  strncat (d, s, n);   /* { dg-warning "source argument is the same as destination" "strncat" } */
+}
+
+void call_strncat (char *d, size_t n)
+{
+  const char *s = d;
+  wrap_strncat (d, s, n);
+}
+
+
+static void wrap_strncpy (char *d, const char *s, size_t n)
+{
+  strncpy (d, s, n);   /* { dg-warning "source argument is the same as destination" "strncpy" } */
+}
+
+void call_strncpy (char *d, size_t n)
+{
+  const char *s = d;
+  wrap_strncpy (d, s, n);
+}