Add {-# OPTIONS_GHC -w #-} and some blurb to all compiler modules

[ghc-hetmet.git] / compiler / coreSyn / CorePrep.lhs

diff --git a/compiler/coreSyn/CorePrep.lhs b/compiler/coreSyn/CorePrep.lhs
index c8f35ea..049960f 100644 (file)
--- a/compiler/coreSyn/CorePrep.lhs
+++ b/compiler/coreSyn/CorePrep.lhs
@@ -1,42 +1,45 @@
 %
-% (c) The University of Glasgow, 1994-2000
+% (c) The University of Glasgow, 1994-2006
 %
-\section{Core pass to saturate constructors and PrimOps}
+
+Core pass to saturate constructors and PrimOps
 
 \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 CorePrep (
       corePrepPgm, corePrepExpr
   ) where
 
 #include "HsVersions.h"
 
-import CoreUtils( exprType, exprIsHNF, etaExpand, exprArity, exprOkForSpeculation )
-import CoreFVs ( exprFreeVars )
-import CoreLint        ( endPass )
+import CoreUtils hiding (exprIsTrivial)
+import CoreFVs
+import CoreLint
 import CoreSyn
-import Type    ( Type, applyTy, 
-                  splitFunTy_maybe, isUnLiftedType, isUnboxedTupleType, seqType )
-import Coercion ( coercionKind )
-import TyCon   ( TyCon, tyConDataCons )
-import NewDemand  ( Demand, isStrictDmd, lazyDmd, StrictSig(..), DmdType(..) )
-import Var     ( Var, Id, setVarUnique )
+import Type
+import Coercion
+import TyCon
+import NewDemand
+import Var
 import VarSet
 import VarEnv
-import Id      ( mkSysLocal, idType, idNewDemandInfo, idArity, setIdUnfolding, 
-                 isFCallId, isGlobalId, isLocalId, hasNoBinding, idNewStrictness, 
-                 isPrimOpId_maybe
-               )
-import DataCon   ( dataConWorkId )
-import PrimOp    ( PrimOp( DataToTagOp ) )
-import BasicTypes ( TopLevelFlag(..), isTopLevel, isNotTopLevel,
-                   RecFlag(..), isNonRec
-                 )
+import Id
+import IdInfo
+import DataCon
+import PrimOp
+import BasicTypes
 import UniqSupply
 import Maybes
 import OrdList
 import ErrUtils
 import DynFlags
-import Util       ( listLengthCmp )
+import Util
 import Outputable
 \end{code}
 
@@ -385,6 +388,12 @@ corePrepExprFloat env (Note n@(SCC _) expr)
     deLamFloat expr1                   `thenUs` \ (floats, expr2) ->
     returnUs (floats, Note n expr2)
 
+corePrepExprFloat env (Case (Var id) bndr ty [(DEFAULT,[],expr)])
+  | Just (TickBox {}) <- isTickBoxOp_maybe id
+  = corePrepAnExpr env expr            `thenUs` \ expr1 ->
+    deLamFloat expr1                   `thenUs` \ (floats, expr2) ->
+    return (floats, Case (Var id) bndr ty [(DEFAULT,[],expr2)])
+
 corePrepExprFloat env (Note other_note expr)
   = corePrepExprFloat env expr         `thenUs` \ (floats, expr') ->
     returnUs (floats, Note other_note expr')