data_cons = tyConDataCons vect_tc
Just sum_tycon = repr_sum_tycon
- sum_datacons = tyConDataCons sum_tycon
+ sum_data_cons = tyConDataCons sum_tycon
mk_alts _ _ [] = [(DEFAULT, [], Var unitDataConId)]
mk_alts [dc] [vars] [expr] = [(DataAlt dc, vars, expr)]
- mk_alts dcs vars exprs = zipWith4 mk_alt dcs vars sum_datacons exprs
+ mk_alts dcs vars exprs = zipWith4 mk_alt dcs vars sum_data_cons exprs
mk_alt dc vars sum_dc expr = (DataAlt dc, vars,
mkConApp sum_dc (map Type prod_tys ++ [expr]))
[dc] = tyConDataCons tc
buildFromPRepr :: TyConRepr -> TyCon -> TyCon -> TyCon -> VM CoreExpr
-buildFromPRepr _ vect_tc prepr_tc _
+buildFromPRepr (TyConRepr {
+ repr_tys = repr_tys
+ , repr_prod_tycons = prod_tycons
+ , repr_prod_tys = prod_tys
+ , repr_sum_tycon = repr_sum_tycon
+ , repr_type = repr_type
+ })
+ vect_tc prepr_tc _
= do
arg_ty <- mkPReprType res_ty
- arg <- newLocalVar FSLIT("x") arg_ty
- alts <- mapM mk_alt data_cons
- body <- mkFromPRepr (unwrapFamInstScrut prepr_tc var_tys (Var arg))
- res_ty alts
- return $ Lam arg body
+ arg <- newLocalVar FSLIT("x") arg_ty
+
+ liftM (Lam arg
+ . un_sum (unwrapFamInstScrut prepr_tc var_tys (Var arg)))
+ (sequence $ zipWith4 un_prod data_cons prod_tycons prod_tys repr_tys)
where
var_tys = mkTyVarTys $ tyConTyVars vect_tc
+ ty_args = map Type var_tys
res_ty = mkTyConApp vect_tc var_tys
data_cons = tyConDataCons vect_tc
- mk_alt dc = do
- bndrs <- mapM (newLocalVar FSLIT("x")) $ dataConRepArgTys dc
- return (bndrs, mkConApp dc (map Type var_tys ++ map Var bndrs))
+ Just sum_tc = repr_sum_tycon
+ sum_data_cons = tyConDataCons sum_tc
+
+ un_prod dc _ _ []
+ = do
+ var <- newLocalVar FSLIT("u") unitTy
+ return (var, mkConApp dc ty_args)
+ un_prod dc _ _ [ty]
+ = do
+ var <- newLocalVar FSLIT("x") ty
+ return (var, mkConApp dc (ty_args ++ [Var var]))
+
+ un_prod dc (Just prod_tc) prod_ty tys
+ = do
+ vars <- mapM (newLocalVar FSLIT("x")) tys
+ pv <- newLocalVar FSLIT("p") prod_ty
+
+ let res = mkConApp dc (ty_args ++ map Var vars)
+ expr = Case (Var pv) (mkWildId prod_ty) res_ty
+ [(DataAlt prod_dc, vars, res)]
+
+ return (pv, expr)
+ where
+ [prod_dc] = tyConDataCons prod_tc
+
+
+ un_sum scrut [(var, expr)] = Let (NonRec var scrut) expr
+ un_sum scrut alts
+ = Case scrut (mkWildId repr_type) res_ty
+ $ zipWith mk_alt sum_data_cons alts
+
+ mk_alt sum_dc (var, expr) = (DataAlt sum_dc, [var], expr)
+
buildToArrPRepr :: TyConRepr -> TyCon -> TyCon -> TyCon -> VM CoreExpr
buildToArrPRepr _ vect_tc prepr_tc arr_tc