+ [ptup_con] = tyConDataCons ptup_tc
+
+ from_comp _ res expr (Keep _ _) = return (res, [expr])
+ from_comp _ res expr (Wrap ty)
+ = do
+ wrap_tc <- builtin wrapTyCon
+ (pwrap_tc, _) <- pdataReprTyCon (mkTyConApp wrap_tc [ty])
+ return (res, [unwrapNewTypeBody pwrap_tc [ty]
+ $ unwrapFamInstScrut pwrap_tc [ty] expr])
+
+ fold f res_ty res exprs rs = foldrM f' (res, []) (zip exprs rs)
+ where
+ f' (expr, r) (res, args) = do
+ (res', args') <- f res_ty res expr r
+ return (res', args' ++ args)
+
+buildPRDict :: TyCon -> TyCon -> TyCon -> SumRepr -> VM CoreExpr
+buildPRDict vect_tc prepr_tc _ r
+ = do
+ dict <- sum_dict r
+ pr_co <- mkBuiltinCo prTyCon
+ let co = mkAppCoercion pr_co
+ . mkSymCoercion
+ $ mkTyConApp arg_co ty_args
+ return (mkCoerce co dict)
+ where
+ ty_args = mkTyVarTys (tyConTyVars vect_tc)
+ Just arg_co = tyConFamilyCoercion_maybe prepr_tc
+
+ sum_dict EmptySum = prDFunOfTyCon =<< builtin voidTyCon
+ sum_dict (UnarySum r) = con_dict r
+ sum_dict (Sum { repr_sum_tc = sum_tc
+ , repr_con_tys = tys
+ , repr_cons = cons
+ })
+ = do
+ dicts <- mapM con_dict cons
+ dfun <- prDFunOfTyCon sum_tc
+ return $ dfun `mkTyApps` tys `mkApps` dicts
+
+ con_dict (ConRepr _ r) = prod_dict r
+
+ prod_dict EmptyProd = prDFunOfTyCon =<< builtin voidTyCon
+ prod_dict (UnaryProd r) = comp_dict r
+ prod_dict (Prod { repr_tup_tc = tup_tc
+ , repr_comp_tys = tys
+ , repr_comps = comps })
+ = do
+ dicts <- mapM comp_dict comps
+ dfun <- prDFunOfTyCon tup_tc
+ return $ dfun `mkTyApps` tys `mkApps` dicts
+
+ comp_dict (Keep _ pr) = return pr
+ comp_dict (Wrap ty) = wrapPR ty
+
+
+buildPDataTyCon :: TyCon -> TyCon -> SumRepr -> VM TyCon
+buildPDataTyCon orig_tc vect_tc repr = fixV $ \repr_tc ->
+ do
+ name' <- cloneName mkPDataTyConOcc orig_name
+ rhs <- buildPDataTyConRhs orig_name vect_tc repr_tc repr
+ pdata <- builtin pdataTyCon
+
+ liftDs $ buildAlgTyCon name'
+ tyvars
+ [] -- no stupid theta
+ rhs
+ rec_flag -- FIXME: is this ok?
+ False -- FIXME: no generics
+ False -- not GADT syntax
+ (Just $ mk_fam_inst pdata vect_tc)
+ where
+ orig_name = tyConName orig_tc
+ tyvars = tyConTyVars vect_tc
+ rec_flag = boolToRecFlag (isRecursiveTyCon vect_tc)
+
+
+buildPDataTyConRhs :: Name -> TyCon -> TyCon -> SumRepr -> VM AlgTyConRhs
+buildPDataTyConRhs orig_name vect_tc repr_tc repr
+ = do
+ data_con <- buildPDataDataCon orig_name vect_tc repr_tc repr
+ return $ DataTyCon { data_cons = [data_con], is_enum = False }
+
+buildPDataDataCon :: Name -> TyCon -> TyCon -> SumRepr -> VM DataCon
+buildPDataDataCon orig_name vect_tc repr_tc repr
+ = do
+ dc_name <- cloneName mkPDataDataConOcc orig_name
+ comp_tys <- sum_tys repr
+
+ liftDs $ buildDataCon dc_name
+ False -- not infix
+ (map (const HsNoBang) comp_tys)
+ [] -- no field labels
+ tvs
+ [] -- no existentials
+ [] -- no eq spec
+ [] -- no context
+ comp_tys
+ (mkFamilyTyConApp repr_tc (mkTyVarTys tvs))
+ repr_tc
+ where
+ tvs = tyConTyVars vect_tc
+
+ sum_tys EmptySum = return []
+ sum_tys (UnarySum r) = con_tys r
+ sum_tys (Sum { repr_sel_ty = sel_ty
+ , repr_cons = cons })
+ = liftM (sel_ty :) (concatMapM con_tys cons)
+
+ con_tys (ConRepr _ r) = prod_tys r
+
+ prod_tys EmptyProd = return []
+ prod_tys (UnaryProd r) = liftM singleton (comp_ty r)
+ prod_tys (Prod { repr_comps = comps }) = mapM comp_ty comps
+
+ comp_ty r = mkPDataType (compOrigType r)
+
+
+buildTyConBindings :: TyCon -> TyCon -> TyCon -> TyCon -> SumRepr
+ -> VM Var
+buildTyConBindings orig_tc vect_tc prepr_tc pdata_tc repr
+ = do
+ vectDataConWorkers orig_tc vect_tc pdata_tc
+ buildPADict vect_tc prepr_tc pdata_tc repr
+
+vectDataConWorkers :: TyCon -> TyCon -> TyCon -> VM ()
+vectDataConWorkers orig_tc vect_tc arr_tc
+ = do
+ bs <- sequence
+ . zipWith3 def_worker (tyConDataCons orig_tc) rep_tys
+ $ zipWith4 mk_data_con (tyConDataCons vect_tc)
+ rep_tys
+ (inits rep_tys)
+ (tail $ tails rep_tys)
+ mapM_ (uncurry hoistBinding) bs
+ where
+ tyvars = tyConTyVars vect_tc
+ var_tys = mkTyVarTys tyvars
+ ty_args = map Type var_tys
+ res_ty = mkTyConApp vect_tc var_tys
+
+ cons = tyConDataCons vect_tc
+ arity = length cons
+ [arr_dc] = tyConDataCons arr_tc
+
+ rep_tys = map dataConRepArgTys $ tyConDataCons vect_tc
+
+
+ mk_data_con con tys pre post
+ = liftM2 (,) (vect_data_con con)
+ (lift_data_con tys pre post (mkDataConTag con))
+
+ sel_replicate len tag
+ | arity > 1 = do
+ rep <- builtin (selReplicate arity)
+ return [rep `mkApps` [len, tag]]
+
+ | otherwise = return []
+
+ vect_data_con con = return $ mkConApp con ty_args
+ lift_data_con tys pre_tys post_tys tag
+ = do
+ len <- builtin liftingContext
+ args <- mapM (newLocalVar (fsLit "xs"))
+ =<< mapM mkPDataType tys
+
+ sel <- sel_replicate (Var len) tag
+
+ pre <- mapM emptyPD (concat pre_tys)
+ post <- mapM emptyPD (concat post_tys)
+
+ return . mkLams (len : args)
+ . wrapFamInstBody arr_tc var_tys
+ . mkConApp arr_dc
+ $ ty_args ++ sel ++ pre ++ map Var args ++ post
+
+ def_worker data_con arg_tys mk_body
+ = do
+ arity <- polyArity tyvars
+ body <- closedV
+ . inBind orig_worker
+ . polyAbstract tyvars $ \args ->
+ liftM (mkLams (tyvars ++ args) . vectorised)
+ $ buildClosures tyvars [] arg_tys res_ty mk_body
+
+ raw_worker <- cloneId mkVectOcc orig_worker (exprType body)
+ let vect_worker = raw_worker `setIdUnfolding`
+ mkInlineRule body (Just arity)
+ defGlobalVar orig_worker vect_worker
+ return (vect_worker, body)
+ where
+ orig_worker = dataConWorkId data_con
+
+buildPADict :: TyCon -> TyCon -> TyCon -> SumRepr -> VM Var
+buildPADict vect_tc prepr_tc arr_tc repr
+ = polyAbstract tvs $ \args ->
+ do
+ method_ids <- mapM (method args) paMethods
+
+ pa_tc <- builtin paTyCon
+ pa_dc <- builtin paDataCon
+ let dict = mkLams (tvs ++ args)
+ $ mkConApp pa_dc
+ $ Type inst_ty : map (method_call args) method_ids
+
+ dfun_ty = mkForAllTys tvs
+ $ mkFunTys (map varType args) (mkTyConApp pa_tc [inst_ty])
+
+ raw_dfun <- newExportedVar dfun_name dfun_ty
+ let dfun = raw_dfun `setIdUnfolding` mkDFunUnfolding dfun_ty (map Var method_ids)
+ `setInlinePragma` dfunInlinePragma
+
+ hoistBinding dfun dict
+ return dfun
+ where
+ tvs = tyConTyVars vect_tc
+ arg_tys = mkTyVarTys tvs
+ inst_ty = mkTyConApp vect_tc arg_tys
+
+ dfun_name = mkPADFunOcc (getOccName vect_tc)
+
+ method args (name, build)
+ = localV
+ $ do
+ expr <- build vect_tc prepr_tc arr_tc repr
+ let body = mkLams (tvs ++ args) expr
+ raw_var <- newExportedVar (method_name name) (exprType body)
+ let var = raw_var
+ `setIdUnfolding` mkInlineRule body (Just (length args))
+ `setInlinePragma` alwaysInlinePragma
+ hoistBinding var body
+ return var
+
+ method_call args id = mkApps (Var id) (map Type arg_tys ++ map Var args)
+
+ method_name name = mkVarOcc $ occNameString dfun_name ++ ('$' : name)
+
+
+paMethods :: [(String, TyCon -> TyCon -> TyCon -> SumRepr -> VM CoreExpr)]
+paMethods = [("dictPRepr", buildPRDict),
+ ("toPRepr", buildToPRepr),
+ ("fromPRepr", buildFromPRepr),
+ ("toArrPRepr", buildToArrPRepr),
+ ("fromArrPRepr", buildFromArrPRepr)]
+