X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2Fvectorise%2FVectType.hs;h=11d69d6f6708137690cc22cf41103037a08b21de;hb=f86c92d05b404383e0a98cd5de8c2ba649804fc8;hp=046acb9db58f018aa468aba6a3594177bfd2ad46;hpb=d5744ef51a8b8b1e063daa98026a9f803bfc88b4;p=ghc-hetmet.git diff --git a/compiler/vectorise/VectType.hs b/compiler/vectorise/VectType.hs index 046acb9..11d69d6 100644 --- a/compiler/vectorise/VectType.hs +++ b/compiler/vectorise/VectType.hs @@ -1,64 +1,65 @@ {-# OPTIONS -fno-warn-missing-signatures #-} -module VectType ( vectTyCon, vectAndLiftType, vectType, vectTypeEnv, - -- arrSumArity, pdataCompTys, pdataCompVars, - buildPADict, - fromVect ) +module VectType ( + vectTyCon, + vectAndLiftType, + vectType, + vectTypeEnv, + buildPADict, + fromVect +) where - import VectUtils import Vectorise.Env +import Vectorise.Convert import Vectorise.Vect import Vectorise.Monad import Vectorise.Builtins import Vectorise.Type.Type import Vectorise.Type.TyConDecl import Vectorise.Type.Classify +import Vectorise.Type.PADict +import Vectorise.Type.PData +import Vectorise.Type.PRepr +import Vectorise.Type.Repr import Vectorise.Utils.Closure import Vectorise.Utils.Hoisting -import HscTypes ( TypeEnv, extendTypeEnvList, typeEnvTyCons ) -import BasicTypes +import HscTypes import CoreSyn import CoreUtils import CoreUnfold -import MkCore ( mkWildCase ) -import BuildTyCl import DataCon import TyCon import Type -import TypeRep -import Coercion -import FamInstEnv ( FamInst, mkLocalFamInst ) +import FamInstEnv import OccName import Id import MkId import Var -import Name ( Name, getOccName ) import NameEnv import Unique import UniqFM import Util - import Outputable import FastString - -import MonadUtils ( zipWith3M, foldrM, concatMapM ) -import Control.Monad ( liftM, liftM2, zipWithM, zipWithM_, mapAndUnzipM ) +import MonadUtils +import Control.Monad import Data.List debug = False dtrace s x = if debug then pprTrace "VectType" s x else x --- ---------------------------------------------------------------------------- --- Type definitions - - -- | Vectorise a type environment. -- The type environment contains all the type things defined in a module. -vectTypeEnv :: TypeEnv -> VM (TypeEnv, [FamInst], [(Var, CoreExpr)]) +vectTypeEnv + :: TypeEnv + -> VM ( TypeEnv -- Vectorised type environment. + , [FamInst] -- New type family instances. + , [(Var, CoreExpr)]) -- New top level bindings. + vectTypeEnv env = dtrace (ppr env) $ do @@ -117,527 +118,23 @@ vectTypeEnv env mk_map env = listToUFM_Directly [(u, getUnique n /= u) | (u,n) <- nameEnvUniqueElts env] -mk_fam_inst :: TyCon -> TyCon -> (TyCon, [Type]) -mk_fam_inst fam_tc arg_tc - = (fam_tc, [mkTyConApp arg_tc . mkTyVarTys $ tyConTyVars arg_tc]) - - -buildPReprTyCon :: TyCon -> TyCon -> SumRepr -> VM TyCon -buildPReprTyCon orig_tc vect_tc repr - = do - name <- cloneName mkPReprTyConOcc (tyConName orig_tc) - -- rhs_ty <- buildPReprType vect_tc - rhs_ty <- sumReprType repr - prepr_tc <- builtin preprTyCon - liftDs $ buildSynTyCon name - tyvars - (SynonymTyCon rhs_ty) - (typeKind rhs_ty) - (Just $ mk_fam_inst prepr_tc vect_tc) - where - tyvars = tyConTyVars vect_tc - -data CompRepr = Keep Type - CoreExpr -- PR dictionary for the type - | Wrap Type - -data ProdRepr = EmptyProd - | UnaryProd CompRepr - | Prod { repr_tup_tc :: TyCon -- representation tuple tycon - , repr_ptup_tc :: TyCon -- PData representation tycon - , repr_comp_tys :: [Type] -- representation types of - , repr_comps :: [CompRepr] -- components - } -data ConRepr = ConRepr DataCon ProdRepr - -data SumRepr = EmptySum - | UnarySum ConRepr - | Sum { repr_sum_tc :: TyCon -- representation sum tycon - , repr_psum_tc :: TyCon -- PData representation tycon - , repr_sel_ty :: Type -- type of selector - , repr_con_tys :: [Type] -- representation types of - , repr_cons :: [ConRepr] -- components - } - -tyConRepr :: TyCon -> VM SumRepr -tyConRepr tc = sum_repr (tyConDataCons tc) - where - sum_repr [] = return EmptySum - sum_repr [con] = liftM UnarySum (con_repr con) - sum_repr cons = do - rs <- mapM con_repr cons - sum_tc <- builtin (sumTyCon arity) - tys <- mapM conReprType rs - (psum_tc, _) <- pdataReprTyCon (mkTyConApp sum_tc tys) - sel_ty <- builtin (selTy arity) - return $ Sum { repr_sum_tc = sum_tc - , repr_psum_tc = psum_tc - , repr_sel_ty = sel_ty - , repr_con_tys = tys - , repr_cons = rs - } - where - arity = length cons - - con_repr con = liftM (ConRepr con) (prod_repr (dataConRepArgTys con)) - - prod_repr [] = return EmptyProd - prod_repr [ty] = liftM UnaryProd (comp_repr ty) - prod_repr tys = do - rs <- mapM comp_repr tys - tup_tc <- builtin (prodTyCon arity) - tys' <- mapM compReprType rs - (ptup_tc, _) <- pdataReprTyCon (mkTyConApp tup_tc tys') - return $ Prod { repr_tup_tc = tup_tc - , repr_ptup_tc = ptup_tc - , repr_comp_tys = tys' - , repr_comps = rs - } - where - arity = length tys - - comp_repr ty = liftM (Keep ty) (prDictOfType ty) - `orElseV` return (Wrap ty) - -sumReprType :: SumRepr -> VM Type -sumReprType EmptySum = voidType -sumReprType (UnarySum r) = conReprType r -sumReprType (Sum { repr_sum_tc = sum_tc, repr_con_tys = tys }) - = return $ mkTyConApp sum_tc tys - -conReprType :: ConRepr -> VM Type -conReprType (ConRepr _ r) = prodReprType r - -prodReprType :: ProdRepr -> VM Type -prodReprType EmptyProd = voidType -prodReprType (UnaryProd r) = compReprType r -prodReprType (Prod { repr_tup_tc = tup_tc, repr_comp_tys = tys }) - = return $ mkTyConApp tup_tc tys - -compReprType :: CompRepr -> VM Type -compReprType (Keep ty _) = return ty -compReprType (Wrap ty) = do - wrap_tc <- builtin wrapTyCon - return $ mkTyConApp wrap_tc [ty] - -compOrigType :: CompRepr -> Type -compOrigType (Keep ty _) = ty -compOrigType (Wrap ty) = ty - -buildToPRepr :: TyCon -> TyCon -> TyCon -> SumRepr -> VM CoreExpr -buildToPRepr vect_tc repr_tc _ repr - = do - let arg_ty = mkTyConApp vect_tc ty_args - res_ty <- mkPReprType arg_ty - arg <- newLocalVar (fsLit "x") arg_ty - result <- to_sum (Var arg) arg_ty res_ty repr - return $ Lam arg result - where - ty_args = mkTyVarTys (tyConTyVars vect_tc) - - wrap_repr_inst = wrapFamInstBody repr_tc ty_args - - to_sum _ _ _ EmptySum - = do - void <- builtin voidVar - return $ wrap_repr_inst $ Var void - - to_sum arg arg_ty res_ty (UnarySum r) - = do - (pat, vars, body) <- con_alt r - return $ mkWildCase arg arg_ty res_ty - [(pat, vars, wrap_repr_inst body)] - - to_sum arg arg_ty res_ty (Sum { repr_sum_tc = sum_tc - , repr_con_tys = tys - , repr_cons = cons }) - = do - alts <- mapM con_alt cons - let alts' = [(pat, vars, wrap_repr_inst - $ mkConApp sum_con (map Type tys ++ [body])) - | ((pat, vars, body), sum_con) - <- zip alts (tyConDataCons sum_tc)] - return $ mkWildCase arg arg_ty res_ty alts' - - con_alt (ConRepr con r) - = do - (vars, body) <- to_prod r - return (DataAlt con, vars, body) - - to_prod EmptyProd - = do - void <- builtin voidVar - return ([], Var void) - - to_prod (UnaryProd comp) - = do - var <- newLocalVar (fsLit "x") (compOrigType comp) - body <- to_comp (Var var) comp - return ([var], body) - - to_prod(Prod { repr_tup_tc = tup_tc - , repr_comp_tys = tys - , repr_comps = comps }) - = do - vars <- newLocalVars (fsLit "x") (map compOrigType comps) - exprs <- zipWithM to_comp (map Var vars) comps - return (vars, mkConApp tup_con (map Type tys ++ exprs)) - where - [tup_con] = tyConDataCons tup_tc - - to_comp expr (Keep _ _) = return expr - to_comp expr (Wrap ty) = do - wrap_tc <- builtin wrapTyCon - return $ wrapNewTypeBody wrap_tc [ty] expr - - -buildFromPRepr :: TyCon -> TyCon -> TyCon -> SumRepr -> VM CoreExpr -buildFromPRepr vect_tc repr_tc _ repr - = do - arg_ty <- mkPReprType res_ty - arg <- newLocalVar (fsLit "x") arg_ty - - result <- from_sum (unwrapFamInstScrut repr_tc ty_args (Var arg)) - repr - return $ Lam arg result - where - ty_args = mkTyVarTys (tyConTyVars vect_tc) - res_ty = mkTyConApp vect_tc ty_args - - from_sum _ EmptySum - = do - dummy <- builtin fromVoidVar - return $ Var dummy `App` Type res_ty - - from_sum expr (UnarySum r) = from_con expr r - from_sum expr (Sum { repr_sum_tc = sum_tc - , repr_con_tys = tys - , repr_cons = cons }) - = do - vars <- newLocalVars (fsLit "x") tys - es <- zipWithM from_con (map Var vars) cons - return $ mkWildCase expr (exprType expr) res_ty - [(DataAlt con, [var], e) - | (con, var, e) <- zip3 (tyConDataCons sum_tc) vars es] - - from_con expr (ConRepr con r) - = from_prod expr (mkConApp con $ map Type ty_args) r - - from_prod _ con EmptyProd = return con - from_prod expr con (UnaryProd r) - = do - e <- from_comp expr r - return $ con `App` e - - from_prod expr con (Prod { repr_tup_tc = tup_tc - , repr_comp_tys = tys - , repr_comps = comps - }) - = do - vars <- newLocalVars (fsLit "y") tys - es <- zipWithM from_comp (map Var vars) comps - return $ mkWildCase expr (exprType expr) res_ty - [(DataAlt tup_con, vars, con `mkApps` es)] - where - [tup_con] = tyConDataCons tup_tc - - from_comp expr (Keep _ _) = return expr - from_comp expr (Wrap ty) - = do - wrap <- builtin wrapTyCon - return $ unwrapNewTypeBody wrap [ty] expr - - -buildToArrPRepr :: TyCon -> TyCon -> TyCon -> SumRepr -> VM CoreExpr -buildToArrPRepr vect_tc prepr_tc pdata_tc r - = do - arg_ty <- mkPDataType el_ty - res_ty <- mkPDataType =<< mkPReprType el_ty - arg <- newLocalVar (fsLit "xs") arg_ty - - pdata_co <- mkBuiltinCo pdataTyCon - let Just repr_co = tyConFamilyCoercion_maybe prepr_tc - co = mkAppCoercion pdata_co - . mkSymCoercion - $ mkTyConApp repr_co ty_args - - scrut = unwrapFamInstScrut pdata_tc ty_args (Var arg) - - (vars, result) <- to_sum r - - return . Lam arg - $ mkWildCase scrut (mkTyConApp pdata_tc ty_args) res_ty - [(DataAlt pdata_dc, vars, mkCoerce co result)] - where - ty_args = mkTyVarTys $ tyConTyVars vect_tc - el_ty = mkTyConApp vect_tc ty_args - - [pdata_dc] = tyConDataCons pdata_tc - - - to_sum EmptySum = do - pvoid <- builtin pvoidVar - return ([], Var pvoid) - to_sum (UnarySum r) = to_con r - to_sum (Sum { repr_psum_tc = psum_tc - , repr_sel_ty = sel_ty - , repr_con_tys = tys - , repr_cons = cons - }) - = do - (vars, exprs) <- mapAndUnzipM to_con cons - sel <- newLocalVar (fsLit "sel") sel_ty - return (sel : concat vars, mk_result (Var sel) exprs) - where - [psum_con] = tyConDataCons psum_tc - mk_result sel exprs = wrapFamInstBody psum_tc tys - $ mkConApp psum_con - $ map Type tys ++ (sel : exprs) - - to_con (ConRepr _ r) = to_prod r - - to_prod EmptyProd = do - pvoid <- builtin pvoidVar - return ([], Var pvoid) - to_prod (UnaryProd r) - = do - pty <- mkPDataType (compOrigType r) - var <- newLocalVar (fsLit "x") pty - expr <- to_comp (Var var) r - return ([var], expr) - - to_prod (Prod { repr_ptup_tc = ptup_tc - , repr_comp_tys = tys - , repr_comps = comps }) - = do - ptys <- mapM (mkPDataType . compOrigType) comps - vars <- newLocalVars (fsLit "x") ptys - es <- zipWithM to_comp (map Var vars) comps - return (vars, mk_result es) - where - [ptup_con] = tyConDataCons ptup_tc - mk_result exprs = wrapFamInstBody ptup_tc tys - $ mkConApp ptup_con - $ map Type tys ++ exprs - - to_comp expr (Keep _ _) = return expr - - -- FIXME: this is bound to be wrong! - to_comp expr (Wrap ty) - = do - wrap_tc <- builtin wrapTyCon - (pwrap_tc, _) <- pdataReprTyCon (mkTyConApp wrap_tc [ty]) - return $ wrapNewTypeBody pwrap_tc [ty] expr - - -buildFromArrPRepr :: TyCon -> TyCon -> TyCon -> SumRepr -> VM CoreExpr -buildFromArrPRepr vect_tc prepr_tc pdata_tc r - = do - arg_ty <- mkPDataType =<< mkPReprType el_ty - res_ty <- mkPDataType el_ty - arg <- newLocalVar (fsLit "xs") arg_ty - - pdata_co <- mkBuiltinCo pdataTyCon - let Just repr_co = tyConFamilyCoercion_maybe prepr_tc - co = mkAppCoercion pdata_co - $ mkTyConApp repr_co var_tys - - scrut = mkCoerce co (Var arg) - - mk_result args = wrapFamInstBody pdata_tc var_tys - $ mkConApp pdata_con - $ map Type var_tys ++ args - - (expr, _) <- fixV $ \ ~(_, args) -> - from_sum res_ty (mk_result args) scrut r - - return $ Lam arg expr - - -- (args, mk) <- from_sum res_ty scrut r - - -- let result = wrapFamInstBody pdata_tc var_tys - -- . mkConApp pdata_dc - -- $ map Type var_tys ++ args - - -- return $ Lam arg (mk result) - where - var_tys = mkTyVarTys $ tyConTyVars vect_tc - el_ty = mkTyConApp vect_tc var_tys - - [pdata_con] = tyConDataCons pdata_tc - - from_sum _ res _ EmptySum = return (res, []) - from_sum res_ty res expr (UnarySum r) = from_con res_ty res expr r - from_sum res_ty res expr (Sum { repr_psum_tc = psum_tc - , repr_sel_ty = sel_ty - , repr_con_tys = tys - , repr_cons = cons }) - = do - sel <- newLocalVar (fsLit "sel") sel_ty - ptys <- mapM mkPDataType tys - vars <- newLocalVars (fsLit "xs") ptys - (res', args) <- fold from_con res_ty res (map Var vars) cons - let scrut = unwrapFamInstScrut psum_tc tys expr - body = mkWildCase scrut (exprType scrut) res_ty - [(DataAlt psum_con, sel : vars, res')] - return (body, Var sel : args) - where - [psum_con] = tyConDataCons psum_tc - - - from_con res_ty res expr (ConRepr _ r) = from_prod res_ty res expr r - - from_prod _ res _ EmptyProd = return (res, []) - from_prod res_ty res expr (UnaryProd r) - = from_comp res_ty res expr r - from_prod res_ty res expr (Prod { repr_ptup_tc = ptup_tc - , repr_comp_tys = tys - , repr_comps = comps }) - = do - ptys <- mapM mkPDataType tys - vars <- newLocalVars (fsLit "ys") ptys - (res', args) <- fold from_comp res_ty res (map Var vars) comps - let scrut = unwrapFamInstScrut ptup_tc tys expr - body = mkWildCase scrut (exprType scrut) res_ty - [(DataAlt ptup_con, vars, res')] - return (body, args) - where - [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 :: 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 + = 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 + = 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 + where tyvars = tyConTyVars vect_tc var_tys = mkTyVarTys tyvars ty_args = map Type var_tys @@ -695,129 +192,3 @@ vectDataConWorkers orig_tc vect_tc arr_tc 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)] - - --- ---------------------------------------------------------------------------- --- Conversions - --- | Build an expression that calls the vectorised version of some --- function from a `Closure`. --- --- For example --- @ --- \(x :: Double) -> --- \(y :: Double) -> --- ($v_foo $: x) $: y --- @ --- --- We use the type of the original binding to work out how many --- outer lambdas to add. --- -fromVect - :: Type -- ^ The type of the original binding. - -> CoreExpr -- ^ Expression giving the closure to use, eg @$v_foo@. - -> VM CoreExpr - --- Convert the type to the core view if it isn't already. -fromVect ty expr - | Just ty' <- coreView ty - = fromVect ty' expr - --- For each function constructor in the original type we add an outer --- lambda to bind the parameter variable, and an inner application of it. -fromVect (FunTy arg_ty res_ty) expr - = do - arg <- newLocalVar (fsLit "x") arg_ty - varg <- toVect arg_ty (Var arg) - varg_ty <- vectType arg_ty - vres_ty <- vectType res_ty - apply <- builtin applyVar - body <- fromVect res_ty - $ Var apply `mkTyApps` [varg_ty, vres_ty] `mkApps` [expr, varg] - return $ Lam arg body - --- If the type isn't a function then it's time to call on the closure. -fromVect ty expr - = identityConv ty >> return expr - - --- TODO: What is this really doing? -toVect :: Type -> CoreExpr -> VM CoreExpr -toVect ty expr = identityConv ty >> return expr - - --- | Check that we have the vectorised versions of all the --- type constructors in this type. -identityConv :: Type -> VM () -identityConv ty - | Just ty' <- coreView ty - = identityConv ty' - -identityConv (TyConApp tycon tys) - = do mapM_ identityConv tys - identityConvTyCon tycon - -identityConv _ = noV - - --- | Check that we have the vectorised version of this type constructor. -identityConvTyCon :: TyCon -> VM () -identityConvTyCon tc - | isBoxedTupleTyCon tc = return () - | isUnLiftedTyCon tc = return () - | otherwise - = do tc' <- maybeV (lookupTyCon tc) - if tc == tc' then return () else noV - -