1 files changed, 52 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/cpp/charconst-4.c b/gcc/testsuite/gcc.dg/cpp/charconst-4.c
new file mode 100644
index 000000000..aae33d35e
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/cpp/charconst-4.c
@@ -0,0 +1,52 @@
+/* Copyright (C) 2001 Free Software Foundation, Inc.  */
+
+/* { dg-do run } */
+/* { dg-options "-Wno-multichar -fsigned-char" } */
+
+/* This tests how overly-long multichar charconsts are truncated, and
+   whether "short" multichar charconsts are incorrectly sign extended
+   (regardless of char signedness).  Preprocessor is used so that we
+   have only one place where the too long warning is generated, so
+   that the test works for all targets.
+
+   Neil Booth, 8 May 2002.  */
+
+#include <limits.h>
+
+extern void abort (void);
+
+#if INT_MAX == 32767
+# define LONG_CHARCONST '!\234a'
+# define SHORT_CHARCONST '\234a'
+# define POS_CHARCONST '\1'
+#elif INT_MAX == 2147483647
+# define LONG_CHARCONST '!\234abc'
+# define SHORT_CHARCONST '\234abc'
+# define POS_CHARCONST '\234a'
+#elif INT_MAX == 9223372036854775807
+# define LONG_CHARCONST '!\234abcdefg'
+# define SHORT_CHARCONST '\234abcdefg'
+# define POS_CHARCONST '\234a'
+#else
+/* Target int size not handled, do something that won't fail.  */
+# define LONG_CHARCONST '\234a'
+# define SHORT_CHARCONST '\234a'
+# define POS_CHARCONST '\1'
+#endif
+
+#if POS_CHARCONST < 0
+# error Charconst incorrectly sign-extended
+#endif
+
+#if LONG_CHARCONST != SHORT_CHARCONST /* { dg-warning "too long" "" } */
+# error Overly long charconst truncates wrongly for preprocessor
+#endif
+
+int main ()
+{
+  if (POS_CHARCONST < 0)
+    abort ();
+  if (LONG_CHARCONST != SHORT_CHARCONST)  /* { dg-warning "too long" "" } */
+    abort ();
+  return 0;
+}