import Unique
import UniqFM
import UniqSet
+import Util ( singleton )
import Digraph ( SCC(..), stronglyConnComp )
import Outputable
| IdRepr Type
-mkProduct :: [Type] -> VM Repr
-mkProduct tys
+ | VoidRepr {
+ void_tycon :: TyCon
+ , void_bottom :: CoreExpr
+ }
+
+voidRepr :: VM Repr
+voidRepr
+ = do
+ tycon <- builtin voidTyCon
+ var <- builtin voidVar
+ return $ VoidRepr {
+ void_tycon = tycon
+ , void_bottom = Var var
+ }
+
+unboxedProductRepr :: [Type] -> VM Repr
+unboxedProductRepr [] = voidRepr
+unboxedProductRepr [ty] = return $ IdRepr ty
+unboxedProductRepr tys = boxedProductRepr tys
+
+boxedProductRepr :: [Type] -> VM Repr
+boxedProductRepr tys
= do
tycon <- builtin (prodTyCon arity)
let [data_con] = tyConDataCons tycon
where
arity = length tys
-mkSubProduct :: [Type] -> VM Repr
-mkSubProduct [ty] = return $ IdRepr ty
-mkSubProduct tys = mkProduct tys
-
-mkSum :: [Repr] -> VM Repr
-mkSum [repr] = return repr
-mkSum reprs
+sumRepr :: [Repr] -> VM Repr
+sumRepr [] = voidRepr
+sumRepr [repr] = boxRepr repr
+sumRepr reprs
= do
tycon <- builtin (sumTyCon arity)
(arr_tycon, _) <- parrayReprTyCon
where
arity = length reprs
+splitSumRepr :: Repr -> [Repr]
+splitSumRepr (SumRepr { sum_components = reprs }) = reprs
+splitSumRepr repr = [repr]
+
+boxRepr :: Repr -> VM Repr
+boxRepr (VoidRepr {}) = boxedProductRepr []
+boxRepr (IdRepr ty) = boxedProductRepr [ty]
+boxRepr repr = return repr
+
reprType :: Repr -> Type
reprType (ProdRepr { prod_tycon = tycon, prod_components = tys })
= mkTyConApp tycon tys
reprType (SumRepr { sum_tycon = tycon, sum_components = reprs })
= mkTyConApp tycon (map reprType reprs)
reprType (IdRepr ty) = ty
+reprType (VoidRepr { void_tycon = tycon }) = mkTyConApp tycon []
arrReprType :: Repr -> VM Type
arrReprType = mkPArrayType . reprType
return [intPrimTy, mkTyConApp int_arr [], mkTyConApp int_arr []]
arrShapeTys (ProdRepr {}) = return [intPrimTy]
arrShapeTys (IdRepr _) = return []
+arrShapeTys (VoidRepr {}) = return [intPrimTy]
arrShapeVars :: Repr -> VM [Var]
arrShapeVars repr = mapM (newLocalVar FSLIT("sh")) =<< arrShapeTys repr
up <- builtin upToPAIntPrimVar
return [len, Var rep `mkApps` [len, tag], Var up `App` len]
replicateShape (IdRepr _) _ _ = return []
-
-arrReprElemTys :: Repr -> [[Type]]
-arrReprElemTys (SumRepr { sum_components = prods })
- = map arrProdElemTys prods
-arrReprElemTys prod@(ProdRepr {})
- = [arrProdElemTys prod]
-arrReprElemTys (IdRepr ty) = [[ty]]
-
-arrProdElemTys (ProdRepr { prod_components = [] })
- = [unitTy]
-arrProdElemTys (ProdRepr { prod_components = tys })
- = tys
-arrProdElemTys (IdRepr ty) = [ty]
-
-arrReprTys :: Repr -> VM [[Type]]
-arrReprTys = mapM (mapM mkPArrayType) . arrReprElemTys
+replicateShape (VoidRepr {}) len _ = return [len]
+
+emptyArrRepr :: Repr -> VM [CoreExpr]
+emptyArrRepr (SumRepr { sum_components = prods })
+ = liftM concat $ mapM emptyArrRepr prods
+emptyArrRepr (ProdRepr { prod_components = [] })
+ = return [Var unitDataConId]
+emptyArrRepr (ProdRepr { prod_components = tys })
+ = mapM emptyPA tys
+emptyArrRepr (IdRepr ty)
+ = liftM singleton $ emptyPA ty
+emptyArrRepr (VoidRepr { void_tycon = tycon })
+ = liftM singleton $ emptyPA (mkTyConApp tycon [])
+
+arrReprTys :: Repr -> VM [Type]
+arrReprTys (SumRepr { sum_components = reprs })
+ = liftM concat $ mapM arrReprTys reprs
+arrReprTys (ProdRepr { prod_components = [] })
+ = return [unitTy]
+arrReprTys (ProdRepr { prod_components = tys })
+ = mapM mkPArrayType tys
+arrReprTys (IdRepr ty)
+ = liftM singleton $ mkPArrayType ty
+arrReprTys (VoidRepr { void_tycon = tycon })
+ = liftM singleton $ mkPArrayType (mkTyConApp tycon [])
+
+arrReprTys' :: Repr -> VM [[Type]]
+arrReprTys' (SumRepr { sum_components = reprs })
+ = mapM arrReprTys reprs
+arrReprTys' repr = liftM singleton $ arrReprTys repr
arrReprVars :: Repr -> VM [[Var]]
arrReprVars repr
- = mapM (mapM (newLocalVar FSLIT("rs"))) =<< arrReprTys repr
+ = mapM (mapM (newLocalVar FSLIT("rs"))) =<< arrReprTys' repr
mkRepr :: TyCon -> VM Repr
mkRepr vect_tc
- | [tys] <- rep_tys = mkProduct tys
- | otherwise = mkSum =<< mapM mkSubProduct rep_tys
+ = sumRepr =<< mapM unboxedProductRepr rep_tys
where
rep_tys = map dataConRepArgTys $ tyConDataCons vect_tc
var <- newLocalVar FSLIT("y") ty
return ([var], Var var)
+ prod_alt (VoidRepr { void_bottom = bottom })
+ = return ([], bottom)
+
+
buildFromPRepr :: Repr -> TyCon -> TyCon -> TyCon -> VM CoreExpr
buildFromPRepr repr vect_tc prepr_tc _
= do
from_prod (IdRepr _) con expr
= return $ con `App` expr
+ from_prod (VoidRepr {}) con expr
+ = return con
+
buildToArrPRepr :: Repr -> TyCon -> TyCon -> TyCon -> VM CoreExpr
buildToArrPRepr repr vect_tc prepr_tc arr_tc
= do
. mkConApp data_con
$ map Type tys ++ len : map Var repr_vars
- to_prod [var] (IdRepr ty)
- = return (Var var)
+ to_prod [var] (IdRepr ty) = return (Var var)
+ to_prod [var] (VoidRepr {}) = return (Var var)
+
buildFromArrPRepr :: Repr -> TyCon -> TyCon -> TyCon -> VM CoreExpr
buildFromArrPRepr repr vect_tc prepr_tc arr_tc
body
= return $ Let (NonRec repr_var expr) body
+ from_prod (VoidRepr {})
+ expr
+ shape_vars
+ [repr_var]
+ res_ty
+ body
+ = return $ Let (NonRec repr_var expr) body
+
buildPRDictRepr :: Repr -> VM CoreExpr
+buildPRDictRepr (VoidRepr { void_tycon = tycon })
+ = prDFunOfTyCon tycon
buildPRDictRepr (IdRepr ty) = mkPR ty
buildPRDictRepr (ProdRepr {
prod_components = tys
shape_tys <- arrShapeTys repr
repr_tys <- arrReprTys repr
- let tys = shape_tys ++ concat repr_tys
+ let tys = shape_tys ++ repr_tys
liftDs $ buildDataCon dc_name
False -- not infix
. zipWith3 def_worker (tyConDataCons orig_tc) rep_tys
$ zipWith4 mk_data_con (tyConDataCons vect_tc)
rep_tys
- (inits arr_tys)
- (tail $ tails arr_tys)
+ (inits reprs)
+ (tail $ tails reprs)
mapM_ (uncurry hoistBinding) bs
where
tyvars = tyConTyVars vect_tc
res_ty = mkTyConApp vect_tc var_tys
rep_tys = map dataConRepArgTys $ tyConDataCons vect_tc
- arr_tys = arrReprElemTys repr
+ reprs = splitSumRepr repr
[arr_dc] = tyConDataCons arr_tc
mk_data_con con tys pre post
= liftM2 (,) (vect_data_con con)
- (lift_data_con tys (concat pre)
- (concat post)
- (mkDataConTag con))
+ (lift_data_con tys pre post (mkDataConTag con))
vect_data_con con = return $ mkConApp con ty_args
- lift_data_con tys pre_tys post_tys tag
+ lift_data_con tys pre_reprs post_reprs tag
= do
len <- builtin liftingContext
args <- mapM (newLocalVar FSLIT("xs"))
shape <- replicateShape repr (Var len) tag
repr <- mk_arr_repr (Var len) (map Var args)
- pre <- mapM emptyPA pre_tys
- post <- mapM emptyPA post_tys
+ pre <- liftM concat $ mapM emptyArrRepr pre_reprs
+ post <- liftM concat $ mapM emptyArrRepr post_reprs
return . mkLams (len : args)
. wrapFamInstBody arr_tc var_tys
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