Incomplete support for boxing during vectorisation

[ghc-hetmet.git] / compiler / vectorise / VectUtils.hs

diff --git a/compiler/vectorise/VectUtils.hs b/compiler/vectorise/VectUtils.hs
index bdee5ea..a540b4d 100644 (file)
--- a/compiler/vectorise/VectUtils.hs
+++ b/compiler/vectorise/VectUtils.hs
@@ -18,7 +18,7 @@ module VectUtils (
   parrayReprTyCon, parrayReprDataCon, mkVScrut,
   prDFunOfTyCon,
   paDictArgType, paDictOfType, paDFunType,
-  paMethod, mkPR, lengthPA, replicatePA, emptyPA, packPA, liftPA,
+  paMethod, mkPR, lengthPA, replicatePA, emptyPA, packPA, combinePA, liftPA,
   polyAbstract, polyApply, polyVApply,
   hoistBinding, hoistExpr, hoistPolyVExpr, takeHoisted,
   buildClosure, buildClosures,
@@ -262,6 +262,14 @@ packPA :: Type -> CoreExpr -> CoreExpr -> CoreExpr -> VM CoreExpr
 packPA ty xs len sel = liftM (`mkApps` [len, sel])
                              (paMethod pa_pack ty)
 
+combinePA :: Type -> CoreExpr -> CoreExpr -> CoreExpr -> [CoreExpr]
+          -> VM CoreExpr
+combinePA ty len sel is xs
+  = liftM (`mkApps` (len : sel : is : xs))
+          (paMethod (combinePAVar n, "combine" ++ show n ++ "PA") ty)
+  where
+    n = length xs
+
 liftPA :: CoreExpr -> VM CoreExpr
 liftPA x
   = do
@@ -338,6 +346,19 @@ takeHoisted
       setGEnv $ env { global_bindings = [] }
       return $ global_bindings env
 
+boxExpr :: Type -> VExpr -> VM VExpr
+boxExpr ty (vexpr, lexpr)
+  | Just (tycon, []) <- splitTyConApp_maybe ty
+  , isUnLiftedTyCon tycon
+  = do
+      r <- lookupBoxedTyCon tycon
+      case r of
+        Just tycon' -> let [dc] = tyConDataCons tycon'
+                       in
+                       return (mkConApp dc [vexpr], lexpr)
+        Nothing     -> return (vexpr, lexpr)
+
+
 mkClosure :: Type -> Type -> Type -> VExpr -> VExpr -> VM VExpr
 mkClosure arg_ty res_ty env_ty (vfn,lfn) (venv,lenv)
   = do