\begin{code}
mkSplitUniqSupply (C# c#)
= let
-#if __GLASGOW_HASKELL__ >= 503
mask# = (i2w (ord# c#)) `uncheckedShiftL#` (i2w_s 24#)
-#else
- mask# = (i2w (ord# c#)) `shiftL#` (i2w_s 24#)
-#endif
-- here comes THE MAGIC:
-- This is one of the most hammered bits in the whole compiler
mk_supply#
= unsafeInterleaveIO (
- genSymZh >>= \ (W# u#) ->
+ genSymZh >>= \ (I# u#) ->
mk_supply# >>= \ s1 ->
mk_supply# >>= \ s2 ->
- return (MkSplitUniqSupply (w2i (mask# `or#` u#)) s1 s2)
+ return (MkSplitUniqSupply (w2i (mask# `or#` (i2w u#))) s1 s2)
)
in
mk_supply#
-foreign import ccall unsafe "genSymZh" genSymZh :: IO Word
+foreign import ccall unsafe "genSymZh" genSymZh :: IO Int
splitUniqSupply (MkSplitUniqSupply _ s1 s2) = (s1, s2)
\end{code}