X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2Fvectorise%2FVectorise.hs;h=607a44ce740ced0bc46baa8b3f9f391ef2ee8413;hb=704c20f11cbb01c36d13472042dc5ace9b1bb0e0;hp=720019b102b73b171f97a7a58c7df08878c6ed89;hpb=d9049898e07e957bd5c24fb4a0257709b8186959;p=ghc-hetmet.git diff --git a/compiler/vectorise/Vectorise.hs b/compiler/vectorise/Vectorise.hs index 720019b..607a44c 100644 --- a/compiler/vectorise/Vectorise.hs +++ b/compiler/vectorise/Vectorise.hs @@ -6,10 +6,437 @@ where import DynFlags import HscTypes +import CoreLint ( showPass, endPass ) +import CoreSyn +import CoreUtils +import CoreFVs +import TyCon +import Type +import TypeRep +import Var +import VarEnv +import Name ( mkSysTvName ) +import NameEnv +import Id + +import DsMonad hiding (mapAndUnzipM) + +import PrelNames + +import Outputable +import FastString +import Control.Monad ( liftM, liftM2, mapAndUnzipM ) + vectorise :: HscEnv -> ModGuts -> IO ModGuts vectorise hsc_env guts | not (Opt_Vectorise `dopt` dflags) = return guts - | otherwise = return guts + | otherwise + = do + showPass dflags "Vectorisation" + eps <- hscEPS hsc_env + let info = hptVectInfo hsc_env `plusVectInfo` eps_vect_info eps + Just guts' <- initDs hsc_env (mg_module guts) + (mg_rdr_env guts) + (mg_types guts) + (vectoriseModule info guts) + endPass dflags "Vectorisation" Opt_D_dump_vect (mg_binds guts') + return guts' where dflags = hsc_dflags hsc_env +-- ---------------------------------------------------------------------------- +-- Vectorisation monad + +data Builtins = Builtins { + parrayTyCon :: TyCon + , paTyCon :: TyCon + , closureTyCon :: TyCon + , mkClosureVar :: Var + , applyClosureVar :: Var + , mkClosurePVar :: Var + , applyClosurePVar :: Var + , closurePAVar :: Var + , lengthPAVar :: Var + , replicatePAVar :: Var + } + +initBuiltins :: DsM Builtins +initBuiltins + = do + parrayTyCon <- dsLookupTyCon parrayTyConName + paTyCon <- dsLookupTyCon paTyConName + closureTyCon <- dsLookupTyCon closureTyConName + + mkClosureVar <- dsLookupGlobalId mkClosureName + applyClosureVar <- dsLookupGlobalId applyClosureName + mkClosurePVar <- dsLookupGlobalId mkClosurePName + applyClosurePVar <- dsLookupGlobalId applyClosurePName + closurePAVar <- dsLookupGlobalId closurePAName + lengthPAVar <- dsLookupGlobalId lengthPAName + replicatePAVar <- dsLookupGlobalId replicatePAName + + return $ Builtins { + parrayTyCon = parrayTyCon + , paTyCon = paTyCon + , closureTyCon = closureTyCon + , mkClosureVar = mkClosureVar + , applyClosureVar = applyClosureVar + , mkClosurePVar = mkClosurePVar + , applyClosurePVar = applyClosurePVar + , closurePAVar = closurePAVar + , lengthPAVar = lengthPAVar + , replicatePAVar = replicatePAVar + } + +data GlobalEnv = GlobalEnv { + -- Mapping from global variables to their vectorised versions. + -- + global_vars :: VarEnv CoreExpr + + -- Exported variables which have a vectorised version + -- + , global_exported_vars :: VarEnv (Var, Var) + + -- Mapping from TyCons to their vectorised versions. + -- TyCons which do not have to be vectorised are mapped to + -- themselves. + -- + , global_tycons :: NameEnv TyCon + + -- Mapping from TyCons to their PA dictionaries + -- + , global_tycon_pa :: NameEnv CoreExpr + } + +data LocalEnv = LocalEnv { + -- Mapping from local variables to their vectorised and + -- lifted versions + -- + local_vars :: VarEnv (CoreExpr, CoreExpr) + + -- Mapping from tyvars to their PA dictionaries + , local_tyvar_pa :: VarEnv CoreExpr + } + + +initGlobalEnv :: VectInfo -> GlobalEnv +initGlobalEnv info + = GlobalEnv { + global_vars = mapVarEnv (Var . snd) $ vectInfoCCVar info + , global_exported_vars = emptyVarEnv + , global_tycons = mapNameEnv snd $ vectInfoCCTyCon info + , global_tycon_pa = emptyNameEnv + } + +emptyLocalEnv = LocalEnv { + local_vars = emptyVarEnv + , local_tyvar_pa = emptyVarEnv + } + +-- FIXME +updVectInfo :: GlobalEnv -> ModGuts -> ModGuts +updVectInfo env guts = guts { mg_vect_info = info' } + where + info' = info { + vectInfoCCVar = global_exported_vars env + , vectInfoCCTyCon = tc_env + } + + info = mg_vect_info guts + tyenv = mg_types guts + + tc_env = mkNameEnv [(tc_name, (tc,tc')) | tc <- typeEnvTyCons tyenv + , let tc_name = tyConName tc + , Just tc' <- [lookupNameEnv (global_tycons env) tc_name]] + +data VResult a = Yes GlobalEnv LocalEnv a | No + +newtype VM a = VM { runVM :: Builtins -> GlobalEnv -> LocalEnv -> DsM (VResult a) } + +instance Monad VM where + return x = VM $ \bi genv lenv -> return (Yes genv lenv x) + VM p >>= f = VM $ \bi genv lenv -> do + r <- p bi genv lenv + case r of + Yes genv' lenv' x -> runVM (f x) bi genv' lenv' + No -> return No + +noV :: VM a +noV = VM $ \_ _ _ -> return No + +tryV :: VM a -> VM (Maybe a) +tryV (VM p) = VM $ \bi genv lenv -> + do + r <- p bi genv lenv + case r of + Yes genv' lenv' x -> return (Yes genv' lenv' (Just x)) + No -> return (Yes genv lenv Nothing) + +maybeV :: VM (Maybe a) -> VM a +maybeV p = maybe noV return =<< p + +orElseV :: VM a -> VM a -> VM a +orElseV p q = maybe q return =<< tryV p + +localV :: VM a -> VM a +localV p = do + env <- readLEnv id + x <- p + setLEnv env + return x + +liftDs :: DsM a -> VM a +liftDs p = VM $ \bi genv lenv -> do { x <- p; return (Yes genv lenv x) } + +builtin :: (Builtins -> a) -> VM a +builtin f = VM $ \bi genv lenv -> return (Yes genv lenv (f bi)) + +readGEnv :: (GlobalEnv -> a) -> VM a +readGEnv f = VM $ \bi genv lenv -> return (Yes genv lenv (f genv)) + +setGEnv :: GlobalEnv -> VM () +setGEnv genv = VM $ \_ _ lenv -> return (Yes genv lenv ()) + +updGEnv :: (GlobalEnv -> GlobalEnv) -> VM () +updGEnv f = VM $ \_ genv lenv -> return (Yes (f genv) lenv ()) + +readLEnv :: (LocalEnv -> a) -> VM a +readLEnv f = VM $ \bi genv lenv -> return (Yes genv lenv (f lenv)) + +setLEnv :: LocalEnv -> VM () +setLEnv lenv = VM $ \_ genv _ -> return (Yes genv lenv ()) + +updLEnv :: (LocalEnv -> LocalEnv) -> VM () +updLEnv f = VM $ \_ genv lenv -> return (Yes genv (f lenv) ()) + +newTyVar :: FastString -> Kind -> VM Var +newTyVar fs k + = do + u <- liftDs newUnique + return $ mkTyVar (mkSysTvName u fs) k + +lookupTyCon :: TyCon -> VM (Maybe TyCon) +lookupTyCon tc = readGEnv $ \env -> lookupNameEnv (global_tycons env) (tyConName tc) + +-- ---------------------------------------------------------------------------- +-- Bindings + +vectoriseModule :: VectInfo -> ModGuts -> DsM ModGuts +vectoriseModule info guts + = do + builtins <- initBuiltins + r <- runVM (vectModule guts) builtins (initGlobalEnv info) emptyLocalEnv + case r of + Yes genv _ guts' -> return $ updVectInfo genv guts' + No -> return guts + +vectModule :: ModGuts -> VM ModGuts +vectModule guts = return guts + + + +vectBndr :: Var -> VM (Var, Var) +vectBndr v + = do + vty <- vectType (idType v) + lty <- mkPArrayTy vty + let vv = v `Id.setIdType` vty + lv = v `Id.setIdType` lty + updLEnv (mapTo vv lv) + return (vv, lv) + where + mapTo vv lv env = env { local_vars = extendVarEnv (local_vars env) v (Var vv, Var lv) } + +vectBndrIn :: Var -> VM a -> VM (Var, Var, a) +vectBndrIn v p + = localV + $ do + (vv, lv) <- vectBndr v + x <- p + return (vv, lv, x) + +vectBndrsIn :: [Var] -> VM a -> VM ([Var], [Var], a) +vectBndrsIn vs p + = localV + $ do + (vvs, lvs) <- mapAndUnzipM vectBndr vs + x <- p + return (vvs, lvs, x) + +-- ---------------------------------------------------------------------------- +-- Expressions + +replicateP :: CoreExpr -> CoreExpr -> VM CoreExpr +replicateP expr len + = do + pa <- paOfType ty + rep <- builtin replicatePAVar + return $ mkApps (Var rep) [Type ty, pa, expr, len] + where + ty = exprType expr + +capply :: (CoreExpr, CoreExpr) -> (CoreExpr, CoreExpr) -> VM (CoreExpr, CoreExpr) +capply (vfn, lfn) (varg, larg) + = do + apply <- builtin applyClosureVar + applyP <- builtin applyClosurePVar + return (mkApps (Var apply) [Type arg_ty, Type res_ty, vfn, varg], + mkApps (Var applyP) [Type arg_ty, Type res_ty, lfn, larg]) + where + fn_ty = exprType vfn + (arg_ty, res_ty) = splitClosureTy fn_ty + +vectVar :: CoreExpr -> Var -> VM (CoreExpr, CoreExpr) +vectVar lc v = local v `orElseV` global v + 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) + +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 (_, 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 + (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 + return (Let (Rec (zip vbndrs vrhss)) vbody, + Let (Rec (zip lbndrs lrhss)) lbody) + where + (bndrs, rhss) = unzip prs + + vect = do + (vrhss, lrhss) <- mapAndUnzipM (vectExpr lc) rhss + (vbody, lbody) <- vectExpr lc body + return (vrhss, vbody, lrhss, lbody) + +-- ---------------------------------------------------------------------------- +-- PA dictionaries + +paArgType :: Type -> Kind -> VM (Maybe Type) +paArgType ty k + | Just k' <- kindView k = paArgType ty k' + +-- Here, we assume that for a kind (k1 -> k2) to be valid, k1 and k2 can only +-- be made up of * and (->), i.e., they can't be coercion kinds or #. +paArgType ty (FunTy k1 k2) + = do + tv <- newTyVar FSLIT("a") k1 + ty1 <- paArgType' (TyVarTy tv) k1 + ty2 <- paArgType' (AppTy ty (TyVarTy tv)) k2 + return . Just $ ForAllTy tv (FunTy ty1 ty2) + +paArgType ty k + | isLiftedTypeKind k + = do + tc <- builtin paTyCon + return . Just $ TyConApp tc [ty] + + | otherwise + = return Nothing + +paArgType' :: Type -> Kind -> VM Type +paArgType' ty k + = do + r <- paArgType ty k + case r of + Just ty' -> return ty' + Nothing -> pprPanic "paArgType'" (ppr ty) + +paOfTyCon :: TyCon -> VM CoreExpr +-- FIXME: just for now +paOfTyCon tc = maybeV (readGEnv $ \env -> lookupNameEnv (global_tycon_pa env) (tyConName tc)) + +paOfType :: Type -> VM CoreExpr +paOfType ty | Just ty' <- coreView ty = paOfType ty' + +paOfType (TyVarTy tv) = maybeV (readLEnv $ \env -> lookupVarEnv (local_tyvar_pa env) tv) +paOfType (AppTy ty1 ty2) + = do + e1 <- paOfType ty1 + e2 <- paOfType ty2 + return $ mkApps e1 [Type ty2, e2] +paOfType (TyConApp tc tys) + = do + e <- paOfTyCon tc + es <- mapM paOfType tys + return $ mkApps e [arg | (t,e) <- zip tys es, arg <- [Type t, e]] +paOfType (FunTy ty1 ty2) = paOfType (TyConApp funTyCon [ty1,ty2]) +paOfType t@(ForAllTy tv ty) = pprPanic "paOfType:" (ppr t) +paOfType ty = pprPanic "paOfType:" (ppr ty) + + + +-- ---------------------------------------------------------------------------- +-- Types + +vectTyCon :: TyCon -> VM TyCon +vectTyCon tc + | isFunTyCon tc = builtin closureTyCon + | isBoxedTupleTyCon tc = return tc + | isUnLiftedTyCon tc = return tc + | otherwise = do + r <- lookupTyCon tc + case r of + Just tc' -> return tc' + + -- FIXME: just for now + Nothing -> pprTrace "ccTyCon:" (ppr tc) $ return tc + +vectType :: Type -> VM Type +vectType ty | Just ty' <- coreView ty = vectType ty +vectType (TyVarTy tv) = return $ TyVarTy tv +vectType (AppTy ty1 ty2) = liftM2 AppTy (vectType ty1) (vectType ty2) +vectType (TyConApp tc tys) = liftM2 TyConApp (vectTyCon tc) (mapM vectType tys) +vectType (FunTy ty1 ty2) = liftM2 TyConApp (builtin closureTyCon) + (mapM vectType [ty1,ty2]) +vectType (ForAllTy tv ty) + = do + r <- paArgType (TyVarTy tv) (tyVarKind tv) + ty' <- vectType ty + return . ForAllTy tv $ case r of { Just paty -> FunTy paty ty'; Nothing -> ty' } + +vectType ty = pprPanic "vectType:" (ppr ty) + +isClosureTyCon :: TyCon -> Bool +isClosureTyCon tc = tyConUnique tc == closureTyConKey + +splitClosureTy :: Type -> (Type, Type) +splitClosureTy ty + | Just (tc, [arg_ty, res_ty]) <- splitTyConApp_maybe ty + , isClosureTyCon tc + = (arg_ty, res_ty) + + | otherwise = pprPanic "splitClosureTy" (ppr ty) + +mkPArrayTy :: Type -> VM Type +mkPArrayTy ty = do + tc <- builtin parrayTyCon + return $ TyConApp tc [ty] +