X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2Fvectorise%2FVectorise%2FType%2FPADict.hs;h=4c786cf618d81ceffd96907a0c0d77cad70f9c2b;hb=ff3bfae6010625b7ffe96bc62e8e139870684600;hp=d3d45d7efce00c014a58e10b8e982c5a7da47cf7;hpb=1a24ae99d0a7c0a2c6d8104b20405a69da9b9754;p=ghc-hetmet.git diff --git a/compiler/vectorise/Vectorise/Type/PADict.hs b/compiler/vectorise/Vectorise/Type/PADict.hs index d3d45d7..4c786cf 100644 --- a/compiler/vectorise/Vectorise/Type/PADict.hs +++ b/compiler/vectorise/Vectorise/Type/PADict.hs @@ -1,317 +1,112 @@ module Vectorise.Type.PADict - ( buildToPRepr - , buildFromPRepr - , buildToArrPRepr - , buildFromArrPRepr) + (buildPADict) where -import VectUtils import Vectorise.Monad import Vectorise.Builtins import Vectorise.Type.Repr +import Vectorise.Type.PRepr +import Vectorise.Utils + +import BasicTypes import CoreSyn import CoreUtils -import MkCore ( mkWildCase ) +import CoreUnfold import TyCon import Type -import Coercion -import MkId - +import TypeRep +import Id +import Var +import Name import FastString -import MonadUtils -import Control.Monad - - -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) +-- import Outputable + +-- debug = False +-- dtrace s x = if debug then pprTrace "Vectoris.Type.PADict" s x else x + +-- | Build the PA dictionary for some type and hoist it to top level. +-- The PA dictionary holds fns that convert values to and from their vectorised representations. +buildPADict + :: TyCon -- ^ tycon of the type being vectorised. + -> TyCon -- ^ tycon of the type used for the vectorised representation. + -> TyCon -- ^ PRepr instance tycon + -> SumRepr -- ^ representation used for the type being vectorised. + -> VM Var -- ^ name of the top-level dictionary function. + +buildPADict vect_tc prepr_tc arr_tc repr + = polyAbstract tvs $ \args -> + do + -- The superclass dictionary is an argument if the tycon is polymorphic + let mk_super_ty = do + r <- mkPReprType inst_ty + pr_cls <- builtin prClass + return $ PredTy $ ClassP pr_cls [r] + super_tys <- sequence [mk_super_ty | not (null tvs)] + super_args <- mapM (newLocalVar (fsLit "pr")) super_tys + let args' = super_args ++ args + + -- it is constant otherwise + super_consts <- sequence [prDictOfPReprInstTyCon inst_ty prepr_tc [] + | null tvs] + + -- Get ids for each of the methods in the dictionary. + method_ids <- mapM (method args') paMethods + + -- Expression to build the dictionary. + pa_dc <- builtin paDataCon + let dict = mkLams (tvs ++ args') + $ mkConApp pa_dc + $ Type inst_ty + : map Var super_args ++ super_consts + -- the superclass dictionary is + -- either lambda-bound or + -- constant + ++ map (method_call args') method_ids + + -- Build the type of the dictionary function. + pa_cls <- builtin paClass + let dfun_ty = mkForAllTys tvs + $ mkFunTys (map varType args') + (PredTy $ ClassP pa_cls [inst_ty]) + + -- Set the unfolding for the inliner. + raw_dfun <- newExportedVar dfun_name dfun_ty + let dfun_unf = mkDFunUnfolding dfun_ty + $ map (const $ DFunLamArg 0) super_args + ++ map DFunConstArg super_consts + ++ map (DFunPolyArg . Var) method_ids + dfun = raw_dfun `setIdUnfolding` dfun_unf + `setInlinePragma` dfunInlinePragma + + -- Add the new binding to the top-level environment. + hoistBinding dfun dict + return dfun 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]) + 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` mkInlineUnfolding (Just (length args)) body + `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 = [("toPRepr", buildToPRepr), + ("fromPRepr", buildFromPRepr), + ("toArrPRepr", buildToArrPRepr), + ("fromArrPRepr", buildFromArrPRepr)] - 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)