X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2Fvectorise%2FVectUtils.hs;h=6207acdc111ccf7e60050f3116b7981ef35b538d;hp=d6569e70cd8892e5bbf55dccd04520588b5a5205;hb=fb6d198f498d4e325a540f28aaa6e1d1530839c3;hpb=ce39c447ab47ac1616cea079210c7651f486f425 diff --git a/compiler/vectorise/VectUtils.hs b/compiler/vectorise/VectUtils.hs index d6569e7..6207acd 100644 --- a/compiler/vectorise/VectUtils.hs +++ b/compiler/vectorise/VectUtils.hs @@ -1,39 +1,50 @@ module VectUtils ( collectAnnTypeBinders, collectAnnTypeArgs, isAnnTypeArg, collectAnnValBinders, - splitClosureTy, - mkPADictType, mkPArrayType, - paDictArgType, paDictOfType, - paMethod, lengthPA, replicatePA, emptyPA, - polyAbstract, polyApply, polyVApply, - lookupPArrayFamInst, - hoistExpr, hoistPolyVExpr, takeHoisted, - buildClosure, buildClosures + dataConTagZ, mkDataConTag, mkDataConTagLit, + + newLocalVVar, + + mkBuiltinCo, voidType, mkWrapType, + mkPADictType, mkPArrayType, mkPDataType, mkPReprType, mkPArray, + + pdataReprTyCon, pdataReprDataCon, mkVScrut, + prDictOfType, prDFunOfTyCon, + paDictArgType, paDictOfType, paDFunType, + paMethod, wrapPR, replicatePD, emptyPD, packPD, packByTagPD, + combinePD, + liftPD, + zipScalars, scalarClosure, + polyAbstract, polyApply, polyVApply, polyArity, + Inline(..), addInlineArity, inlineMe, + hoistBinding, hoistExpr, hoistPolyVExpr, takeHoisted, + buildClosure, buildClosures, + mkClosureApp ) where -#include "HsVersions.h" - import VectCore import VectMonad -import DsUtils +import MkCore ( mkCoreTup, mkWildCase ) import CoreSyn import CoreUtils +import CoreUnfold ( mkInlineRule ) +import Coercion import Type import TypeRep import TyCon -import DataCon ( dataConWrapId ) +import DataCon import Var -import Id ( mkWildId ) import MkId ( unwrapFamInstScrut ) -import PrelNames +import Id ( setIdUnfolding ) import TysWiredIn import BasicTypes ( Boxity(..) ) +import Literal ( Literal, mkMachInt ) import Outputable import FastString -import Control.Monad ( liftM, zipWithM_ ) +import Control.Monad collectAnnTypeArgs :: AnnExpr b ann -> (AnnExpr b ann, [Type]) collectAnnTypeArgs expr = go expr [] @@ -54,56 +65,103 @@ collectAnnValBinders expr = go [] expr go bs e = (reverse bs, e) isAnnTypeArg :: AnnExpr b ann -> Bool -isAnnTypeArg (_, AnnType t) = True +isAnnTypeArg (_, AnnType _) = True isAnnTypeArg _ = False -isClosureTyCon :: TyCon -> Bool -isClosureTyCon tc = tyConName tc == closureTyConName - -splitClosureTy :: Type -> (Type, Type) -splitClosureTy ty - | Just (tc, [arg_ty, res_ty]) <- splitTyConApp_maybe ty - , isClosureTyCon tc - = (arg_ty, res_ty) +dataConTagZ :: DataCon -> Int +dataConTagZ con = dataConTag con - fIRST_TAG - | otherwise = pprPanic "splitClosureTy" (ppr ty) +mkDataConTagLit :: DataCon -> Literal +mkDataConTagLit = mkMachInt . toInteger . dataConTagZ -isPArrayTyCon :: TyCon -> Bool -isPArrayTyCon tc = tyConName tc == parrayTyConName +mkDataConTag :: DataCon -> CoreExpr +mkDataConTag = mkIntLitInt . dataConTagZ -splitPArrayTy :: Type -> Type -splitPArrayTy ty - | Just (tc, [arg_ty]) <- splitTyConApp_maybe ty - , isPArrayTyCon tc - = arg_ty +splitPrimTyCon :: Type -> Maybe TyCon +splitPrimTyCon ty + | Just (tycon, []) <- splitTyConApp_maybe ty + , isPrimTyCon tycon + = Just tycon - | otherwise = pprPanic "splitPArrayTy" (ppr ty) + | otherwise = Nothing -mkClosureType :: Type -> Type -> VM Type -mkClosureType arg_ty res_ty +mkBuiltinTyConApp :: (Builtins -> TyCon) -> [Type] -> VM Type +mkBuiltinTyConApp get_tc tys = do - tc <- builtin closureTyCon - return $ mkTyConApp tc [arg_ty, res_ty] + tc <- builtin get_tc + return $ mkTyConApp tc tys -mkClosureTypes :: [Type] -> Type -> VM Type -mkClosureTypes arg_tys res_ty +mkBuiltinTyConApps :: (Builtins -> TyCon) -> [Type] -> Type -> VM Type +mkBuiltinTyConApps get_tc tys ty = do - tc <- builtin closureTyCon - return $ foldr (mk tc) res_ty arg_tys + tc <- builtin get_tc + return $ foldr (mk tc) ty tys where - mk tc arg_ty res_ty = mkTyConApp tc [arg_ty, res_ty] + mk tc ty1 ty2 = mkTyConApp tc [ty1,ty2] + +voidType :: VM Type +voidType = mkBuiltinTyConApp VectMonad.voidTyCon [] + +mkWrapType :: Type -> VM Type +mkWrapType ty = mkBuiltinTyConApp wrapTyCon [ty] + +mkClosureTypes :: [Type] -> Type -> VM Type +mkClosureTypes = mkBuiltinTyConApps closureTyCon + +mkPReprType :: Type -> VM Type +mkPReprType ty = mkBuiltinTyConApp preprTyCon [ty] mkPADictType :: Type -> VM Type -mkPADictType ty - = do - tc <- builtin paDictTyCon - return $ TyConApp tc [ty] +mkPADictType ty = mkBuiltinTyConApp paTyCon [ty] mkPArrayType :: Type -> VM Type mkPArrayType ty + | Just tycon <- splitPrimTyCon ty + = do + r <- lookupPrimPArray tycon + case r of + Just arr -> return $ mkTyConApp arr [] + Nothing -> cantVectorise "Primitive tycon not vectorised" (ppr tycon) +mkPArrayType ty = mkBuiltinTyConApp parrayTyCon [ty] + +mkPDataType :: Type -> VM Type +mkPDataType ty = mkBuiltinTyConApp pdataTyCon [ty] + +mkPArray :: Type -> CoreExpr -> CoreExpr -> VM CoreExpr +mkPArray ty len dat = do + tc <- builtin parrayTyCon + let [dc] = tyConDataCons tc + return $ mkConApp dc [Type ty, len, dat] + +mkBuiltinCo :: (Builtins -> TyCon) -> VM Coercion +mkBuiltinCo get_tc + = do + tc <- builtin get_tc + return $ mkTyConApp tc [] + +pdataReprTyCon :: Type -> VM (TyCon, [Type]) +pdataReprTyCon ty = builtin pdataTyCon >>= (`lookupFamInst` [ty]) + +pdataReprDataCon :: Type -> VM (DataCon, [Type]) +pdataReprDataCon ty = do - tc <- builtin parrayTyCon - return $ TyConApp tc [ty] + (tc, arg_tys) <- pdataReprTyCon ty + let [dc] = tyConDataCons tc + return (dc, arg_tys) + +mkVScrut :: VExpr -> VM (CoreExpr, CoreExpr, TyCon, [Type]) +mkVScrut (ve, le) + = do + (tc, arg_tys) <- pdataReprTyCon ty + return (ve, unwrapFamInstScrut tc arg_tys le, tc, arg_tys) + where + ty = exprType ve + +prDFunOfTyCon :: TyCon -> VM CoreExpr +prDFunOfTyCon tycon + = liftM Var + . maybeCantVectoriseM "No PR dictionary for tycon" (ppr tycon) + $ lookupTyConPR tycon paDictArgType :: TyVar -> VM (Maybe Type) paDictArgType tv = go (TyVarTy tv) (tyVarKind tv) @@ -111,7 +169,7 @@ paDictArgType tv = go (TyVarTy tv) (tyVarKind tv) go ty k | Just k' <- kindView k = go ty k' go ty (FunTy k1 k2) = do - tv <- newTyVar FSLIT("a") k1 + tv <- newTyVar (fsLit "a") k1 mty1 <- go (TyVarTy tv) k1 case mty1 of Just ty1 -> do @@ -123,7 +181,7 @@ paDictArgType tv = go (TyVarTy tv) (tyVarKind tv) | isLiftedTypeKind k = liftM Just (mkPADictType ty) - go ty k = return Nothing + go _ _ = return Nothing paDictOfType :: Type -> VM CoreExpr paDictOfType ty = paDictOfTyApp ty_fn ty_args @@ -139,10 +197,22 @@ paDictOfTyApp (TyVarTy tv) ty_args paDFunApply dfun ty_args paDictOfTyApp (TyConApp tc _) ty_args = do - pa_class <- builtin paClass - (dfun, ty_args') <- lookupInst pa_class [TyConApp tc ty_args] - paDFunApply (Var dfun) ty_args' -paDictOfTyApp ty ty_args = pprPanic "paDictOfTyApp" (ppr ty) + dfun <- maybeCantVectoriseM "No PA dictionary for tycon" (ppr tc) + $ lookupTyConPA tc + paDFunApply (Var dfun) ty_args +paDictOfTyApp ty _ + = cantVectorise "Can't construct PA dictionary for type" (ppr ty) + +paDFunType :: TyCon -> VM Type +paDFunType tc + = do + margs <- mapM paDictArgType tvs + res <- mkPADictType (mkTyConApp tc arg_tys) + return . mkForAllTys tvs + $ mkFunTys [arg | Just arg <- margs] res + where + tvs = tyConTyVars tc + arg_tys = mkTyVarTys tvs paDFunApply :: CoreExpr -> [Type] -> VM CoreExpr paDFunApply dfun tys @@ -150,48 +220,124 @@ paDFunApply dfun tys dicts <- mapM paDictOfType tys return $ mkApps (mkTyApps dfun tys) dicts -paMethod :: (Builtins -> Var) -> Type -> VM CoreExpr -paMethod method ty +paMethod :: (Builtins -> Var) -> String -> Type -> VM CoreExpr +paMethod _ name ty + | Just tycon <- splitPrimTyCon ty + = liftM Var + . maybeCantVectoriseM "No PA method" (text name <+> text "for" <+> ppr tycon) + $ lookupPrimMethod tycon name + +paMethod method _ ty = do fn <- builtin method dict <- paDictOfType ty return $ mkApps (Var fn) [Type ty, dict] -lengthPA :: CoreExpr -> VM CoreExpr -lengthPA x = liftM (`App` x) (paMethod lengthPAVar ty) +prDictOfType :: Type -> VM CoreExpr +prDictOfType ty = prDictOfTyApp ty_fn ty_args + where + (ty_fn, ty_args) = splitAppTys ty + +prDictOfTyApp :: Type -> [Type] -> VM CoreExpr +prDictOfTyApp ty_fn ty_args + | Just ty_fn' <- coreView ty_fn = prDictOfTyApp ty_fn' ty_args +prDictOfTyApp (TyConApp tc _) ty_args + = do + dfun <- liftM Var $ maybeV (lookupTyConPR tc) + prDFunApply dfun ty_args +prDictOfTyApp _ _ = noV + +prDFunApply :: CoreExpr -> [Type] -> VM CoreExpr +prDFunApply dfun tys + = do + dicts <- mapM prDictOfType tys + return $ mkApps (mkTyApps dfun tys) dicts + +wrapPR :: Type -> VM CoreExpr +wrapPR ty + = do + pa_dict <- paDictOfType ty + pr_dfun <- prDFunOfTyCon =<< builtin wrapTyCon + return $ mkApps pr_dfun [Type ty, pa_dict] + +replicatePD :: CoreExpr -> CoreExpr -> VM CoreExpr +replicatePD len x = liftM (`mkApps` [len,x]) + (paMethod replicatePDVar "replicatePD" (exprType x)) + +emptyPD :: Type -> VM CoreExpr +emptyPD = paMethod emptyPDVar "emptyPD" + +packPD :: Type -> CoreExpr -> CoreExpr -> CoreExpr -> VM CoreExpr +packPD ty xs len sel = liftM (`mkApps` [xs, len, sel]) + (paMethod packPDVar "packPD" ty) + +packByTagPD :: Type -> CoreExpr -> CoreExpr -> CoreExpr -> CoreExpr + -> VM CoreExpr +packByTagPD ty xs len tags t + = liftM (`mkApps` [xs, len, tags, t]) + (paMethod packByTagPDVar "packByTagPD" ty) + +combinePD :: Type -> CoreExpr -> CoreExpr -> [CoreExpr] + -> VM CoreExpr +combinePD ty len sel xs + = liftM (`mkApps` (len : sel : xs)) + (paMethod (combinePDVar n) ("combine" ++ show n ++ "PD") ty) where - ty = splitPArrayTy (exprType x) + n = length xs -replicatePA :: CoreExpr -> CoreExpr -> VM CoreExpr -replicatePA len x = liftM (`mkApps` [len,x]) - (paMethod replicatePAVar (exprType x)) +liftPD :: CoreExpr -> VM CoreExpr +liftPD x + = do + lc <- builtin liftingContext + replicatePD (Var lc) x -emptyPA :: Type -> VM CoreExpr -emptyPA = paMethod emptyPAVar +zipScalars :: [Type] -> Type -> VM CoreExpr +zipScalars arg_tys res_ty + = do + scalar <- builtin scalarClass + (dfuns, _) <- mapAndUnzipM (\ty -> lookupInst scalar [ty]) ty_args + zipf <- builtin (scalarZip $ length arg_tys) + return $ Var zipf `mkTyApps` ty_args `mkApps` map Var dfuns + where + ty_args = arg_tys ++ [res_ty] + +scalarClosure :: [Type] -> Type -> CoreExpr -> CoreExpr -> VM CoreExpr +scalarClosure arg_tys res_ty scalar_fun array_fun + = do + ctr <- builtin (closureCtrFun $ length arg_tys) + pas <- mapM paDictOfType (init arg_tys) + return $ Var ctr `mkTyApps` (arg_tys ++ [res_ty]) + `mkApps` (pas ++ [scalar_fun, array_fun]) newLocalVVar :: FastString -> Type -> VM VVar newLocalVVar fs vty = do - lty <- mkPArrayType vty + lty <- mkPDataType vty vv <- newLocalVar fs vty lv <- newLocalVar fs lty return (vv,lv) -polyAbstract :: [TyVar] -> ((CoreExpr -> CoreExpr) -> VM a) -> VM a +polyAbstract :: [TyVar] -> ([Var] -> VM a) -> VM a polyAbstract tvs p = localV $ do mdicts <- mapM mk_dict_var tvs - zipWithM_ (\tv -> maybe (defLocalTyVar tv) (defLocalTyVarWithPA tv . Var)) tvs mdicts - p (mk_lams mdicts) + zipWithM_ (\tv -> maybe (defLocalTyVar tv) + (defLocalTyVarWithPA tv . Var)) tvs mdicts + p (mk_args mdicts) where mk_dict_var tv = do r <- paDictArgType tv case r of - Just ty -> liftM Just (newLocalVar FSLIT("dPA") ty) + Just ty -> liftM Just (newLocalVar (fsLit "dPA") ty) Nothing -> return Nothing - mk_lams mdicts = mkLams (tvs ++ [dict | Just dict <- mdicts]) + mk_args mdicts = [dict | Just dict <- mdicts] + +polyArity :: [TyVar] -> VM Int +polyArity tvs = do + tys <- mapM paDictArgType tvs + return $ length [() | Just _ <- tys] polyApply :: CoreExpr -> [Type] -> VM CoreExpr polyApply expr tys @@ -205,31 +351,48 @@ polyVApply expr tys dicts <- mapM paDictOfType tys return $ mapVect (\e -> e `mkTyApps` tys `mkApps` dicts) expr -lookupPArrayFamInst :: Type -> VM (TyCon, [Type]) -lookupPArrayFamInst ty = builtin parrayTyCon >>= (`lookupFamInst` [ty]) -hoistExpr :: FastString -> CoreExpr -> VM Var -hoistExpr fs expr +data Inline = Inline Int -- arity + | DontInline + +addInlineArity :: Inline -> Int -> Inline +addInlineArity (Inline m) n = Inline (m+n) +addInlineArity DontInline _ = DontInline + +inlineMe :: Inline +inlineMe = Inline 0 + +hoistBinding :: Var -> CoreExpr -> VM () +hoistBinding v e = updGEnv $ \env -> + env { global_bindings = (v,e) : global_bindings env } + +hoistExpr :: FastString -> CoreExpr -> Inline -> VM Var +hoistExpr fs expr inl = do - var <- newLocalVar fs (exprType expr) - updGEnv $ \env -> - env { global_bindings = (var, expr) : global_bindings env } + var <- mk_inline `liftM` newLocalVar fs (exprType expr) + hoistBinding var expr return var + where + mk_inline var = case inl of + Inline arity -> var `setIdUnfolding` + mkInlineRule InlSat expr arity + DontInline -> var -hoistVExpr :: VExpr -> VM VVar -hoistVExpr (ve, le) +hoistVExpr :: VExpr -> Inline -> VM VVar +hoistVExpr (ve, le) inl = do fs <- getBindName - vv <- hoistExpr ('v' `consFS` fs) ve - lv <- hoistExpr ('l' `consFS` fs) le + vv <- hoistExpr ('v' `consFS` fs) ve inl + lv <- hoistExpr ('l' `consFS` fs) le (addInlineArity inl 1) return (vv, lv) -hoistPolyVExpr :: [TyVar] -> VM VExpr -> VM VExpr -hoistPolyVExpr tvs p +hoistPolyVExpr :: [TyVar] -> Inline -> VM VExpr -> VM VExpr +hoistPolyVExpr tvs inline p = do - expr <- closedV . polyAbstract tvs $ \abstract -> - liftM (mapVect abstract) p - fn <- hoistVExpr expr + inline' <- liftM (addInlineArity inline) (polyArity tvs) + expr <- closedV . polyAbstract tvs $ \args -> + liftM (mapVect (mkLams $ tvs ++ args)) p + fn <- hoistVExpr expr inline' polyVApply (vVar fn) (mkTyVarTys tvs) takeHoisted :: VM [(Var, CoreExpr)] @@ -239,27 +402,54 @@ takeHoisted setGEnv $ env { global_bindings = [] } return $ global_bindings env +{- +boxExpr :: Type -> VExpr -> VM VExpr +boxExpr ty (vexpr, lexpr) + | Just (tycon, []) <- splitTyConApp_maybe ty + , isUnLiftedTyCon tycon + = do + r <- lookupBoxedTyCon tycon + case r of + Just tycon' -> let [dc] = tyConDataCons tycon' + in + return (mkConApp dc [vexpr], lexpr) + Nothing -> return (vexpr, lexpr) +-} mkClosure :: Type -> Type -> Type -> VExpr -> VExpr -> VM VExpr mkClosure arg_ty res_ty env_ty (vfn,lfn) (venv,lenv) = do dict <- paDictOfType env_ty - mkv <- builtin mkClosureVar - mkl <- builtin mkClosurePVar + mkv <- builtin closureVar + mkl <- builtin liftedClosureVar return (Var mkv `mkTyApps` [arg_ty, res_ty, env_ty] `mkApps` [dict, vfn, lfn, venv], Var mkl `mkTyApps` [arg_ty, res_ty, env_ty] `mkApps` [dict, vfn, lfn, lenv]) -buildClosures :: [TyVar] -> Var -> [VVar] -> [Type] -> Type -> VM VExpr -> VM VExpr -buildClosures tvs lc vars [arg_ty] res_ty mk_body - = buildClosure tvs lc vars arg_ty res_ty mk_body -buildClosures tvs lc vars (arg_ty : arg_tys) res_ty mk_body +mkClosureApp :: Type -> Type -> VExpr -> VExpr -> VM VExpr +mkClosureApp arg_ty res_ty (vclo, lclo) (varg, larg) + = do + vapply <- builtin applyVar + lapply <- builtin liftedApplyVar + lc <- builtin liftingContext + return (Var vapply `mkTyApps` [arg_ty, res_ty] `mkApps` [vclo, varg], + Var lapply `mkTyApps` [arg_ty, res_ty] `mkApps` [Var lc, lclo, larg]) + +buildClosures :: [TyVar] -> [VVar] -> [Type] -> Type -> VM VExpr -> VM VExpr +buildClosures _ _ [] _ mk_body + = mk_body +buildClosures tvs vars [arg_ty] res_ty mk_body + = -- liftM vInlineMe $ + buildClosure tvs vars arg_ty res_ty mk_body +buildClosures tvs vars (arg_ty : arg_tys) res_ty mk_body = do res_ty' <- mkClosureTypes arg_tys res_ty - arg <- newLocalVVar FSLIT("x") arg_ty - buildClosure tvs lc vars arg_ty res_ty' - . hoistPolyVExpr tvs + arg <- newLocalVVar (fsLit "x") arg_ty + -- liftM vInlineMe + buildClosure tvs vars arg_ty res_ty' + . hoistPolyVExpr tvs (Inline (length vars + 1)) $ do - clo <- buildClosures tvs lc (vars ++ [arg]) arg_tys res_ty mk_body + lc <- builtin liftingContext + clo <- buildClosures tvs (vars ++ [arg]) arg_tys res_ty mk_body return $ vLams lc (vars ++ [arg]) clo -- (clo , aclo (Arr lc xs1 ... xsn) ) @@ -267,73 +457,62 @@ buildClosures tvs lc vars (arg_ty : arg_tys) res_ty mk_body -- f = \env v -> case env of -> e x1 ... xn v -- f^ = \env v -> case env of Arr l xs1 ... xsn -> e^ l x1 ... xn v -- -buildClosure :: [TyVar] -> Var -> [VVar] -> Type -> Type -> VM VExpr -> VM VExpr -buildClosure tvs lv vars arg_ty res_ty mk_body +buildClosure :: [TyVar] -> [VVar] -> Type -> Type -> VM VExpr -> VM VExpr +buildClosure tvs vars arg_ty res_ty mk_body = do - (env_ty, env, bind) <- buildEnv lv vars - env_bndr <- newLocalVVar FSLIT("env") env_ty - arg_bndr <- newLocalVVar FSLIT("arg") arg_ty + (env_ty, env, bind) <- buildEnv vars + env_bndr <- newLocalVVar (fsLit "env") env_ty + arg_bndr <- newLocalVVar (fsLit "arg") arg_ty - fn <- hoistPolyVExpr tvs + fn <- hoistPolyVExpr tvs (Inline 2) $ do + lc <- builtin liftingContext body <- mk_body - body' <- bind (vVar env_bndr) - (vVarApps lv body (vars ++ [arg_bndr])) - return (vLamsWithoutLC [env_bndr, arg_bndr] body') + return -- . vInlineMe + . vLams lc [env_bndr, arg_bndr] + $ bind (vVar env_bndr) + (vVarApps lc body (vars ++ [arg_bndr])) mkClosure arg_ty res_ty env_ty fn env -buildEnv :: Var -> [VVar] -> VM (Type, VExpr, VExpr -> VExpr -> VM VExpr) -buildEnv lv vvs - = do - let (ty, venv, vbind) = mkVectEnv tys vs - (lenv, lbind) <- mkLiftEnv lv tys ls - return (ty, (venv, lenv), - \(venv,lenv) (vbody,lbody) -> - do - let vbody' = vbind venv vbody - lbody' <- lbind lenv lbody - return (vbody', lbody')) - where - (vs,ls) = unzip vvs - tys = map idType vs - -mkVectEnv :: [Type] -> [Var] -> (Type, CoreExpr, CoreExpr -> CoreExpr -> CoreExpr) -mkVectEnv [] [] = (unitTy, Var unitDataConId, \env body -> body) -mkVectEnv [ty] [v] = (ty, Var v, \env body -> Let (NonRec v env) body) -mkVectEnv tys vs = (ty, mkCoreTup (map Var vs), - \env body -> Case env (mkWildId ty) (exprType body) - [(DataAlt (tupleCon Boxed (length vs)), vs, body)]) - where - ty = mkCoreTupTy tys - -mkLiftEnv :: Var -> [Type] -> [Var] -> VM (CoreExpr, CoreExpr -> CoreExpr -> VM CoreExpr) -mkLiftEnv lv [ty] [v] - = return (Var v, \env body -> - do - len <- lengthPA (Var v) - return . Let (NonRec v env) - $ Case len lv (exprType body) [(DEFAULT, [], body)]) - --- NOTE: this transparently deals with empty environments -mkLiftEnv lv tys vs +buildEnv :: [VVar] -> VM (Type, VExpr, VExpr -> VExpr -> VExpr) +buildEnv [] = do + ty <- voidType + void <- builtin voidVar + pvoid <- builtin pvoidVar + return (ty, vVar (void, pvoid), \_ body -> body) + +buildEnv [v] = return (vVarType v, vVar v, + \env body -> vLet (vNonRec v env) body) + +buildEnv vs = do - (env_tc, env_tyargs) <- lookupPArrayFamInst vty - let [env_con] = tyConDataCons env_tc - - env = Var (dataConWrapId env_con) - `mkTyApps` env_tyargs - `mkVarApps` (lv : vs) - - bind env body = let scrut = unwrapFamInstScrut env_tc env_tyargs env - in - return $ Case scrut (mkWildId (exprType scrut)) - (exprType body) - [(DataAlt env_con, lv : bndrs, body)] - return (env, bind) - where - vty = mkCoreTupTy tys + + (lenv_tc, lenv_tyargs) <- pdataReprTyCon ty - bndrs | null vs = [mkWildId unitTy] - | otherwise = vs + let venv_con = tupleCon Boxed (length vs) + [lenv_con] = tyConDataCons lenv_tc + + venv = mkCoreTup (map Var vvs) + lenv = Var (dataConWrapId lenv_con) + `mkTyApps` lenv_tyargs + `mkApps` map Var lvs + + vbind env body = mkWildCase env ty (exprType body) + [(DataAlt venv_con, vvs, body)] + + lbind env body = + let scrut = unwrapFamInstScrut lenv_tc lenv_tyargs env + in + mkWildCase scrut (exprType scrut) (exprType body) + [(DataAlt lenv_con, lvs, body)] + + bind (venv, lenv) (vbody, lbody) = (vbind venv vbody, + lbind lenv lbody) + + return (ty, (venv, lenv), bind) + where + (vvs, lvs) = unzip vs + tys = map vVarType vs + ty = mkBoxedTupleTy tys