\section{Common subexpression}
\begin{code}
+{-# OPTIONS_GHC -w #-}
+-- The above warning supression flag is a temporary kludge.
+-- While working on this module you are encouraged to remove it and fix
+-- any warnings in the module. See
+-- http://hackage.haskell.org/trac/ghc/wiki/WorkingConventions#Warnings
+-- for details
+
module CSE (
cseProgram
) where
import Outputable
import StaticFlags ( opt_PprStyle_Debug )
import BasicTypes ( isAlwaysActive )
-import Util ( mapAccumL, lengthExceeds )
+import Util ( lengthExceeds )
import UniqFM
+
+import Data.List
\end{code}