X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2Fvectorise%2FVectorise.hs;h=59039e93f51b2ee2c1fddf950b45695ab04ba4fb;hb=c30cf0bafd49a0acc9320a7807043d0f9060acb7;hp=6f9db0aef58738cfbcd8fe8b027396d0d8151483;hpb=5e979164079ae89ca01483131149b8727dd82686;p=ghc-hetmet.git diff --git a/compiler/vectorise/Vectorise.hs b/compiler/vectorise/Vectorise.hs index 6f9db0a..59039e93 100644 --- a/compiler/vectorise/Vectorise.hs +++ b/compiler/vectorise/Vectorise.hs @@ -13,22 +13,30 @@ import CoreLint ( showPass, endPass ) import CoreSyn import CoreUtils import CoreFVs +import DataCon import TyCon import Type import TypeRep import Var import VarEnv -import Name ( mkSysTvName ) +import VarSet +import Name ( mkSysTvName, getName ) import NameEnv import Id +import MkId ( unwrapFamInstScrut ) +import OccName import DsMonad hiding (mapAndUnzipM) +import DsUtils ( mkCoreTup, mkCoreTupTy ) import PrelNames +import TysWiredIn +import BasicTypes ( Boxity(..) ) import Outputable import FastString -import Control.Monad ( liftM, liftM2, mapAndUnzipM ) +import Control.Monad ( liftM, liftM2, mapAndUnzipM, zipWithM_ ) +import Data.Maybe ( maybeToList ) vectorise :: HscEnv -> ModGuts -> IO ModGuts vectorise hsc_env guts @@ -45,7 +53,46 @@ vectorise hsc_env guts dflags = hsc_dflags hsc_env vectModule :: ModGuts -> VM ModGuts -vectModule guts = return guts +vectModule guts + = do + binds' <- mapM vectTopBind (mg_binds guts) + return $ guts { mg_binds = binds' } + +vectTopBind :: CoreBind -> VM CoreBind +vectTopBind b@(NonRec var expr) + = do + var' <- vectTopBinder var + expr' <- vectTopRhs expr + hs <- takeHoisted + return . Rec $ (var, expr) : (var', expr') : hs + `orElseV` + return b + +vectTopBind b@(Rec bs) + = do + vars' <- mapM vectTopBinder vars + exprs' <- mapM vectTopRhs exprs + hs <- takeHoisted + return . Rec $ bs ++ zip vars' exprs' ++ hs + `orElseV` + return b + where + (vars, exprs) = unzip bs + +vectTopBinder :: Var -> VM Var +vectTopBinder var + = do + vty <- liftM (mkForAllTys tyvars) $ vectType mono_ty + name <- cloneName mkVectOcc (getName var) + let var' | isExportedId var = Id.mkExportedLocalId name vty + | otherwise = Id.mkLocalId name vty + defGlobalVar var var' + return var' + where + (tyvars, mono_ty) = splitForAllTys (idType var) + +vectTopRhs :: CoreExpr -> VM CoreExpr +vectTopRhs = liftM fst . closedV . vectPolyExpr (panic "Empty lifting context") . freeVars -- ---------------------------------------------------------------------------- -- Bindings @@ -102,42 +149,104 @@ capply (vfn, lfn) (varg, larg) (arg_ty, res_ty) = splitClosureTy fn_ty vectVar :: CoreExpr -> Var -> VM (CoreExpr, CoreExpr) -vectVar lc v = local v `orElseV` global v +vectVar lc v + = do + r <- lookupVar v + case r of + Local es -> return es + Global vexpr -> do + lexpr <- replicateP vexpr lc + return (vexpr, lexpr) + +vectPolyVar :: CoreExpr -> Var -> [Type] -> VM (CoreExpr, CoreExpr) +vectPolyVar lc v tys + = do + r <- lookupVar v + case r of + Local (vexpr, lexpr) -> liftM2 (,) (mk_app vexpr) (mk_app lexpr) + Global poly -> do + vexpr <- mk_app poly + lexpr <- replicateP vexpr lc + return (vexpr, lexpr) + where + mk_app e = applyToTypes e =<< mapM vectType tys + +abstractOverTyVars :: [TyVar] -> ((CoreExpr -> CoreExpr) -> VM a) -> VM a +abstractOverTyVars tvs p + = do + mdicts <- mapM mk_dict_var tvs + zipWithM_ (\tv -> maybe (deleteTyVarPA tv) (extendTyVarPA tv . Var)) tvs mdicts + p (mk_lams mdicts) + where + mk_dict_var tv = do + r <- paDictArgType tv + case r of + Just ty -> liftM Just (newLocalVar FSLIT("dPA") ty) + Nothing -> return Nothing + + mk_lams mdicts = mkLams [arg | (tv, mdict) <- zip tvs mdicts + , arg <- tv : maybeToList mdict] + +applyToTypes :: CoreExpr -> [Type] -> VM CoreExpr +applyToTypes expr tys + = do + dicts <- mapM paDictOfType tys + return $ mkApps expr [arg | (ty, dict) <- zip tys dicts + , arg <- [Type ty, dict]] + + +vectPolyExpr :: CoreExpr -> CoreExprWithFVs -> VM (CoreExpr, CoreExpr) +vectPolyExpr lc expr + = localV + . abstractOverTyVars tvs $ \mk_lams -> + -- FIXME: shadowing (tvs in lc) + do + (vmono, lmono) <- vectExpr lc mono + return $ (mk_lams vmono, mk_lams lmono) where - local v = maybeV (readLEnv $ \env -> lookupVarEnv (local_vars env) v) - global v = do - vexpr <- maybeV (readGEnv $ \env -> lookupVarEnv (global_vars env) v) - lexpr <- replicateP vexpr lc - return (vexpr, lexpr) + (tvs, mono) = collectAnnTypeBinders expr vectExpr :: CoreExpr -> CoreExprWithFVs -> VM (CoreExpr, CoreExpr) vectExpr lc (_, AnnType ty) = do vty <- vectType ty return (Type vty, Type vty) + vectExpr lc (_, AnnVar v) = vectVar lc v + vectExpr lc (_, AnnLit lit) = do let vexpr = Lit lit lexpr <- replicateP vexpr lc return (vexpr, lexpr) + vectExpr lc (_, AnnNote note expr) = do (vexpr, lexpr) <- vectExpr lc expr return (Note note vexpr, Note note lexpr) + +vectExpr lc e@(_, AnnApp _ arg) + | isAnnTypeArg arg + = vectTyAppExpr lc fn tys + where + (fn, tys) = collectAnnTypeArgs e + vectExpr lc (_, AnnApp fn arg) = do fn' <- vectExpr lc fn arg' <- vectExpr lc arg capply fn' arg' + vectExpr lc (_, AnnCase expr bndr ty alts) = panic "vectExpr: case" + vectExpr lc (_, AnnLet (AnnNonRec bndr rhs) body) = do - (vrhs, lrhs) <- vectExpr lc rhs + (vrhs, lrhs) <- vectPolyExpr lc rhs (vbndr, lbndr, (vbody, lbody)) <- vectBndrIn bndr (vectExpr lc body) return (Let (NonRec vbndr vrhs) vbody, Let (NonRec lbndr lrhs) lbody) + vectExpr lc (_, AnnLet (AnnRec prs) body) = do (vbndrs, lbndrs, (vrhss, vbody, lrhss, lbody)) <- vectBndrsIn bndrs vect @@ -148,21 +257,168 @@ vectExpr lc (_, AnnLet (AnnRec prs) body) vect = do (vrhss, lrhss) <- mapAndUnzipM (vectExpr lc) rhss - (vbody, lbody) <- vectExpr lc body + (vbody, lbody) <- vectPolyExpr lc body return (vrhss, vbody, lrhss, lbody) -vectExpr lc (_, AnnLam bndr body) - | isTyVar bndr + +vectExpr lc e@(_, AnnLam bndr body) + | isTyVar bndr = pprPanic "vectExpr" (ppr $ deAnnotate e) + +vectExpr lc (fvs, AnnLam bndr body) = do - r <- paDictArgType bndr - (upd_env, add_lam) <- get_upd r - (vbody, lbody) <- localV (upd_env >> vectExpr lc body) - return (Lam bndr (add_lam vbody), Lam bndr (add_lam lbody)) + let tyvars = filter isTyVar (varSetElems fvs) + info <- mkCEnvInfo fvs bndr body + (poly_vfn, poly_lfn) <- mkClosureFns info tyvars bndr body + + vfn_var <- hoistExpr FSLIT("vfn") poly_vfn + lfn_var <- hoistExpr FSLIT("lfn") poly_lfn + + let (venv, lenv) = mkClosureEnvs info lc + + let env_ty = cenv_vty info + + pa_dict <- paDictOfType env_ty + + arg_ty <- vectType (varType bndr) + res_ty <- vectType (exprType $ deAnnotate body) + + -- FIXME: move the functions to the top level + mono_vfn <- applyToTypes (Var vfn_var) (map TyVarTy tyvars) + mono_lfn <- applyToTypes (Var lfn_var) (map TyVarTy tyvars) + + mk_clo <- builtin mkClosureVar + mk_cloP <- builtin mkClosurePVar + + let vclo = Var mk_clo `mkTyApps` [arg_ty, res_ty, env_ty] + `mkApps` [pa_dict, mono_vfn, mono_lfn, venv] + + lclo = Var mk_cloP `mkTyApps` [arg_ty, res_ty, env_ty] + `mkApps` [pa_dict, mono_vfn, mono_lfn, lenv] + + return (vclo, lclo) + + +data CEnvInfo = CEnvInfo { + cenv_vars :: [Var] + , cenv_values :: [(CoreExpr, CoreExpr)] + , cenv_vty :: Type + , cenv_lty :: Type + , cenv_repr_tycon :: TyCon + , cenv_repr_tyargs :: [Type] + , cenv_repr_datacon :: DataCon + } + +mkCEnvInfo :: VarSet -> Var -> CoreExprWithFVs -> VM CEnvInfo +mkCEnvInfo fvs arg body + = do + locals <- readLEnv local_vars + let + (vars, vals) = unzip + [(var, val) | var <- varSetElems fvs + , Just val <- [lookupVarEnv locals var]] + vtys <- mapM (vectType . varType) vars + + (vty, repr_tycon, repr_tyargs, repr_datacon) <- mk_env_ty vtys + lty <- mkPArrayType vty + + return $ CEnvInfo { + cenv_vars = vars + , cenv_values = vals + , cenv_vty = vty + , cenv_lty = lty + , cenv_repr_tycon = repr_tycon + , cenv_repr_tyargs = repr_tyargs + , cenv_repr_datacon = repr_datacon + } where - get_upd Nothing = return (deleteTyVarPA bndr, id) - get_upd (Just pa_ty) = do - pa_var <- newLocalVar FSLIT("dPA") pa_ty - return (extendTyVarPA bndr (Var pa_var), - Lam pa_var) + mk_env_ty [vty] + = return (vty, error "absent cinfo_repr_tycon" + , error "absent cinfo_repr_tyargs" + , error "absent cinfo_repr_datacon") + + mk_env_ty vtys + = do + let ty = mkCoreTupTy vtys + (repr_tc, repr_tyargs) <- lookupPArrayFamInst ty + let [repr_con] = tyConDataCons repr_tc + return (ty, repr_tc, repr_tyargs, repr_con) + + + +mkClosureEnvs :: CEnvInfo -> CoreExpr -> (CoreExpr, CoreExpr) +mkClosureEnvs info lc + | [] <- vals + = (Var unitDataConId, mkApps (Var $ dataConWrapId (cenv_repr_datacon info)) + [lc, Var unitDataConId]) + + | [(vval, lval)] <- vals + = (vval, lval) + + | otherwise + = (mkCoreTup vvals, Var (dataConWrapId $ cenv_repr_datacon info) + `mkTyApps` cenv_repr_tyargs info + `mkApps` (lc : lvals)) + + where + vals = cenv_values info + (vvals, lvals) = unzip vals + +mkClosureFns :: CEnvInfo -> [TyVar] -> Var -> CoreExprWithFVs + -> VM (CoreExpr, CoreExpr) +mkClosureFns info tyvars arg body + = closedV + . abstractOverTyVars tyvars + $ \mk_tlams -> + do + (vfn, lfn) <- mkClosureMonoFns info arg body + return (mk_tlams vfn, mk_tlams lfn) + +mkClosureMonoFns :: CEnvInfo -> Var -> CoreExprWithFVs -> VM (CoreExpr, CoreExpr) +mkClosureMonoFns info arg body + = do + lc_bndr <- newLocalVar FSLIT("lc") intTy + (varg : vbndrs, larg : lbndrs, (vbody, lbody)) + <- vectBndrsIn (arg : cenv_vars info) + (vectExpr (Var lc_bndr) body) + + venv_bndr <- newLocalVar FSLIT("env") vty + lenv_bndr <- newLocalVar FSLIT("env") lty + + let vcase = bind_venv (Var venv_bndr) vbody vbndrs + lcase <- bind_lenv (Var lenv_bndr) lbody lc_bndr lbndrs + return (mkLams [venv_bndr, varg] vcase, mkLams [lenv_bndr, larg] lcase) + where + vty = cenv_vty info + lty = cenv_lty info + + arity = length (cenv_vars info) + + bind_venv venv vbody [] = vbody + bind_venv venv vbody [vbndr] = Let (NonRec vbndr venv) vbody + bind_venv venv vbody vbndrs + = Case venv (mkWildId vty) (exprType vbody) + [(DataAlt (tupleCon Boxed arity), vbndrs, vbody)] + + bind_lenv lenv lbody lc_bndr [lbndr] + = do + lengthPA <- builtin lengthPAVar + return . Let (NonRec lbndr lenv) + $ Case (mkApps (Var lengthPA) [Type vty, (Var lbndr)]) + lc_bndr + intTy + [(DEFAULT, [], lbody)] + + bind_lenv lenv lbody lc_bndr lbndrs + = return + $ Case (unwrapFamInstScrut (cenv_repr_tycon info) + (cenv_repr_tyargs info) + lenv) + (mkWildId lty) + (exprType lbody) + [(DataAlt (cenv_repr_datacon info), lc_bndr : lbndrs, lbody)] + +vectTyAppExpr :: CoreExpr -> CoreExprWithFVs -> [Type] -> VM (CoreExpr, CoreExpr) +vectTyAppExpr lc (_, AnnVar v) tys = vectPolyVar lc v tys +vectTyAppExpr lc e tys = pprPanic "vectTyAppExpr" (ppr $ deAnnotate e) -- ---------------------------------------------------------------------------- -- Types