1 files changed, 31 insertions, 0 deletions
diff --git a/testsuite/tests/codeGen/should_run/cgrun015.hs b/testsuite/tests/codeGen/should_run/cgrun015.hs
new file mode 100644
index 0000000000..eba3b8ab30
--- /dev/null
+++ b/testsuite/tests/codeGen/should_run/cgrun015.hs
@@ -0,0 +1,31 @@
+{-# LANGUAGE MagicHash #-}
+module Main ( main ) where
+
+import Foreign
+import Foreign.C
+import GHC.Exts
+
+data CList = CNil | CCons Int# CList
+
+mk :: Int# -> CList
+mk n  = if (n ==# 0#)
+	then CNil
+	else CCons 1# (mk (n -# 1#))
+
+clen :: CList -> Int#
+clen CNil = 0#
+clen (CCons _ cl) = 1# +# (clen cl)
+
+main = case (clen list4) of
+		len4 ->
+		  case (len4 +# len4) of
+		    8# -> finish 65#	-- 'A'
+		    _  -> finish 66#	-- 'B'
+      where
+      list4	= mk 4#
+
+finish :: Int# -> IO ()
+finish n = c_putchar (castCharToCChar (C# (chr# n))) >> return ()
+
+foreign import ccall unsafe "putchar"
+  c_putchar :: CChar -> IO CInt