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 fb31e45..049960f 100644 (file)
--- a/compiler/coreSyn/CorePrep.lhs
+++ b/compiler/coreSyn/CorePrep.lhs
@@ -5,6 +5,13 @@
 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
@@ -23,6 +30,7 @@ import Var
 import VarSet
 import VarEnv
 import Id
+import IdInfo
 import DataCon
 import PrimOp
 import BasicTypes
@@ -33,7 +41,6 @@ import ErrUtils
 import DynFlags
 import Util
 import Outputable
-import TysWiredIn
 \end{code}
 
 -- ---------------------------------------------------------------------------
@@ -334,8 +341,6 @@ exprIsTrivial (Type _)                     = True
 exprIsTrivial (Lit lit)               = True
 exprIsTrivial (App e arg)             = isTypeArg arg && exprIsTrivial e
 exprIsTrivial (Note (SCC _) e)                = False
-exprIsTrivial (Note (TickBox {}) e)    = False
-exprIsTrivial (Note (BinaryTickBox {}) e) = False
 exprIsTrivial (Note _ e)              = exprIsTrivial e
 exprIsTrivial (Cast e co)              = exprIsTrivial e
 exprIsTrivial (Lam b body) | isTyVar b = exprIsTrivial body
@@ -383,22 +388,11 @@ corePrepExprFloat env (Note n@(SCC _) expr)
     deLamFloat expr1                   `thenUs` \ (floats, expr2) ->
     returnUs (floats, Note n expr2)
 
-corePrepExprFloat env (Note note@(TickBox {}) expr)
+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, Note note expr2)
-
-corePrepExprFloat env (Note note@(BinaryTickBox m t e) expr)
-  = corePrepAnExpr env expr            `thenUs` \ expr1 ->
-    deLamFloat expr1                   `thenUs` \ (floats, expr2) ->
-    getUniqueUs                        `thenUs` \ u ->
-    let bndr = mkSysLocal FSLIT("t") u boolTy in
-    return (floats, Case expr2
-                       bndr
-                       boolTy
-                       [ (DataAlt falseDataCon, [], Note (TickBox m e) (Var falseDataConId))
-                       , (DataAlt trueDataCon,  [], Note (TickBox m t) (Var trueDataConId))
-                       ])
+    return (floats, Case (Var id) bndr ty [(DEFAULT,[],expr2)])
 
 corePrepExprFloat env (Note other_note expr)
   = corePrepExprFloat env expr         `thenUs` \ (floats, expr') ->
@@ -415,21 +409,6 @@ corePrepExprFloat env expr@(Lam _ _)
   where
     (bndrs,body) = collectBinders expr
 
-corePrepExprFloat env (Case (Note note@(TickBox m n) expr) bndr ty alts)
-  = corePrepExprFloat env (Note note (Case expr bndr ty alts))
-
-corePrepExprFloat env (Case (Note note@(BinaryTickBox m t e) expr) bndr ty alts)
-  = do { ASSERT(exprType expr `coreEqType` boolTy)
-         corePrepExprFloat env $
-               Case expr bndr ty
-                       [ (DataAlt falseDataCon, [], Note (TickBox m e) falseBranch)
-                       , (DataAlt trueDataCon,  [], Note (TickBox m t) trueBranch)
-                       ]
-       }
-   where
-       (_,_,trueBranch)  = findAlt (DataAlt trueDataCon) alts
-       (_,_,falseBranch) = findAlt (DataAlt falseDataCon) alts
-
 corePrepExprFloat env (Case scrut bndr ty alts)
   = corePrepExprFloat env scrut                `thenUs` \ (floats1, scrut1) ->
     deLamFloat scrut1                  `thenUs` \ (floats2, scrut2) ->