+ tc <- builtin get_tc
+ return $ foldr (mk tc) ty tys
+ where
+ mk tc ty1 ty2 = mkTyConApp tc [ty1,ty2]
+
+mkBuiltinTyConApps1 :: (Builtins -> TyCon) -> Type -> [Type] -> VM Type
+mkBuiltinTyConApps1 get_tc dft [] = return dft
+mkBuiltinTyConApps1 get_tc dft tys
+ = do
+ tc <- builtin get_tc
+ case tys of
+ [] -> pprPanic "mkBuiltinTyConApps1" (ppr tc)
+ _ -> return $ foldr1 (mk tc) tys
+ where
+ mk tc ty1 ty2 = mkTyConApp tc [ty1,ty2]
+
+data TyConRepr = TyConRepr {
+ repr_tyvars :: [TyVar]
+ , repr_tys :: [[Type]]
+
+ , repr_prod_tycons :: [Maybe TyCon]
+ , repr_prod_data_cons :: [Maybe DataCon]
+ , repr_prod_tys :: [Type]
+ , repr_sum_tycon :: Maybe TyCon
+ , repr_sum_data_cons :: [DataCon]
+ , repr_type :: Type
+ }
+
+mkTyConRepr :: TyCon -> VM TyConRepr
+mkTyConRepr vect_tc
+ = do
+ prod_tycons <- mapM (mk_tycon prodTyCon) rep_tys
+ let prod_tys = zipWith mk_tc_app_maybe prod_tycons rep_tys
+ sum_tycon <- mk_tycon sumTyCon prod_tys
+
+ return $ TyConRepr {
+ repr_tyvars = tyvars
+ , repr_tys = rep_tys
+
+ , repr_prod_tycons = prod_tycons
+ , repr_prod_data_cons = map (fmap mk_single_datacon) prod_tycons
+ , repr_prod_tys = prod_tys
+ , repr_sum_tycon = sum_tycon
+ , repr_sum_data_cons = fmap tyConDataCons sum_tycon `orElse` []
+ , repr_type = mk_tc_app_maybe sum_tycon prod_tys
+ }
+ where
+ tyvars = tyConTyVars vect_tc
+ data_cons = tyConDataCons vect_tc
+ rep_tys = map dataConRepArgTys data_cons
+
+ mk_tycon get_tc tys
+ | n > 1 = builtin (Just . get_tc n)
+ | otherwise = return Nothing
+ where n = length tys
+
+ mk_single_datacon tc | [dc] <- tyConDataCons tc = dc
+
+ mk_tc_app_maybe Nothing [] = unitTy
+ mk_tc_app_maybe Nothing [ty] = ty
+ mk_tc_app_maybe (Just tc) tys = mkTyConApp tc tys
+
+mkToArrPRepr :: CoreExpr -> CoreExpr -> [[CoreExpr]] -> VM CoreExpr
+mkToArrPRepr len sel ess
+ = do
+ let mk_sum [(expr, ty)] = return (expr, ty)
+ mk_sum es
+ = do
+ sum_tc <- builtin . sumTyCon $ length es
+ (sum_rtc, _) <- parrayReprTyCon (mkTyConApp sum_tc tys)
+ let [sum_rdc] = tyConDataCons sum_rtc
+
+ return (mkConApp sum_rdc (map Type tys ++ (len : sel : exprs)),
+ mkTyConApp sum_tc tys)
+ where
+ (exprs, tys) = unzip es
+
+ mk_prod [expr] = return (expr, splitPArrayTy (exprType expr))
+ mk_prod exprs
+ = do
+ prod_tc <- builtin . prodTyCon $ length exprs
+ (prod_rtc, _) <- parrayReprTyCon (mkTyConApp prod_tc tys)
+ let [prod_rdc] = tyConDataCons prod_rtc
+
+ return (mkConApp prod_rdc (map Type tys ++ (len : exprs)),
+ mkTyConApp prod_tc tys)
+ where
+ tys = map (splitPArrayTy . exprType) exprs
+
+ liftM fst (mk_sum =<< mapM mk_prod ess)
+
+mkFromArrPRepr :: CoreExpr -> Type -> Var -> Var -> [[Var]] -> CoreExpr
+ -> VM CoreExpr
+mkFromArrPRepr scrut res_ty len sel vars res
+ = return (Var unitDataConId)
+
+mkClosureType :: Type -> Type -> VM Type
+mkClosureType arg_ty res_ty = mkBuiltinTyConApp closureTyCon [arg_ty, res_ty]
+
+mkClosureTypes :: [Type] -> Type -> VM Type
+mkClosureTypes = mkBuiltinTyConApps closureTyCon
+
+mkPReprType :: Type -> VM Type
+mkPReprType ty = mkBuiltinTyConApp preprTyCon [ty]
+
+mkPADictType :: Type -> VM Type
+mkPADictType ty = mkBuiltinTyConApp paTyCon [ty]