--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/c99-array-lval-2.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,18 @@
+/* Test for non-lvalue arrays decaying to pointers: in C99 only.  */
+/* Origin: Joseph Myers <jsm28@cam.ac.uk> */
+/* { dg-do compile } */
+/* { dg-options "-std=iso9899:1999 -pedantic-errors" } */
+
+struct s { char c[17]; };
+
+struct s x;
+
+extern struct s foo (void);
+
+#define ASSERT(v, a)	char v[((a) ? 1 : -1)]
+
+ASSERT (p, sizeof (x.c) == 17);
+ASSERT (q, sizeof (0, x.c) == sizeof (char *));
+ASSERT (r, sizeof ((foo ()).c) == 17);
+/* The non-lvalue array decays to a pointer in C99.  */
+ASSERT (s, sizeof (0, (foo ()).c) == sizeof (char *)); /* { dg-bogus "array" "bad non-lvalue array handling" } */