--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/cpp/ucs.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,67 @@
+/* Copyright (C) 2001 Free Software Foundation, Inc.  */
+
+/* { dg-do compile } */
+/* { dg-options "-std=c99" } */
+
+/* This tests universal character sequences.
+
+   Neil Booth, 22 May 2001.
+   Richard Henderson, 3 Apr 2002.  */
+
+#include <limits.h>
+
+#define unsigned        +0
+#define int             +0 
+#define char            +1
+#define short           +2 
+#define long            +3
+
+#if __WCHAR_TYPE__ == 0
+# define WCHAR_MAX      INT_MAX
+#elif __WCHAR_TYPE__ == 1
+# define WCHAR_MAX      CHAR_MAX
+#elif __WCHAR_TYPE__ == 2
+# define WCHAR_MAX      SHRT_MAX
+#elif __WCHAR_TYPE__ == 3
+# define WCHAR_MAX      LONG_MAX
+#else
+# error wacky wchar_t
+#endif
+
+#undef unsigned
+#undef int
+#undef char
+#undef short
+#undef long
+
+#if L'\u1234' != 0x1234
+#error bad short ucs	/* { dg-bogus "bad" "bad u1234 evaluation" } */
+#endif
+
+#if WCHAR_MAX >= 0x7ffffff
+# if L'\U1234abcd' != 0x1234abcd
+#  error bad long ucs	/* { dg-bogus "bad" "bad U1234abcd evaluation" } */
+# endif
+#endif
+
+void foo ()
+{
+  int c;
+
+  c = L'\ubad';		/* { dg-error "incomplete" "incomplete UCN 1" } */
+  c = L"\U1234"[0];	/* { dg-error "incomplete" "incompete UCN 2" } */
+
+  c = L'\u000x';	/* { dg-error "incomplete" "non-hex digit in UCN" } */
+  /* If sizeof(HOST_WIDE_INT) > sizeof(wchar_t), we can get a multi-character
+     constant warning even for wide characters.  */
+  /* { dg-warning "too long|multi-character" "" { target *-*-* } .-3 } */
+
+  c = '\u0024';		/* { dg-bogus "invalid" "0024 is a valid UCN" } */
+  c = "\u0040"[0];	/* { dg-bogus "invalid" "0040 is a valid UCN" } */
+  c = L'\u00a0';	/* { dg-bogus "invalid" "00a0 is a valid UCN" } */
+  c = '\U00000060';	/* { dg-bogus "invalid" "0060 is a valid UCN" } */
+
+  c = '\u0025';		/* { dg-error "not a valid" "0025 invalid UCN" } */
+  c = L"\uD800"[0];	/* { dg-error "not a valid" "D800 invalid UCN" } */
+  c = L'\U0000DFFF';	/* { dg-error "not a valid" "DFFF invalid UCN" } */
+}