+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]
+
+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"
+
+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
+ n = length xs
+
+liftPD :: CoreExpr -> VM CoreExpr
+liftPD x
+ = do
+ lc <- builtin liftingContext
+ replicatePD (Var lc) x
+
+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 <- mkPDataType vty
+ vv <- newLocalVar fs vty
+ lv <- newLocalVar fs lty
+ return (vv,lv)
+
+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_args 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_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
+ = do
+ dicts <- mapM paDictOfType tys
+ return $ expr `mkTyApps` tys `mkApps` dicts
+
+polyVApply :: VExpr -> [Type] -> VM VExpr
+polyVApply expr tys
+ = do
+ dicts <- mapM paDictOfType tys
+ return $ mapVect (\e -> e `mkTyApps` tys `mkApps` dicts) 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 <- mk_inline `liftM` newLocalVar fs (exprType expr)
+ hoistBinding var expr
+ return var
+ where
+ mk_inline var = case inl of
+ Inline arity -> var `setIdUnfolding`
+ mkInlineRule needSaturated expr arity
+ DontInline -> var
+
+hoistVExpr :: VExpr -> Inline -> VM VVar
+hoistVExpr (ve, le) inl
+ = do
+ fs <- getBindName
+ vv <- hoistExpr ('v' `consFS` fs) ve inl
+ lv <- hoistExpr ('l' `consFS` fs) le (addInlineArity inl 1)
+ return (vv, lv)
+
+hoistPolyVExpr :: [TyVar] -> Inline -> VM VExpr -> VM VExpr
+hoistPolyVExpr tvs inline p
+ = do
+ 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)]
+takeHoisted
+ = do
+ env <- readGEnv id
+ 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 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])
+
+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
+ -- liftM vInlineMe
+ buildClosure tvs vars arg_ty res_ty'
+ . hoistPolyVExpr tvs (Inline (length vars + 1))
+ $ do
+ lc <- builtin liftingContext
+ clo <- buildClosures tvs (vars ++ [arg]) arg_tys res_ty mk_body
+ return $ vLams lc (vars ++ [arg]) clo
+
+-- (clo <x1,...,xn> <f,f^>, aclo (Arr lc xs1 ... xsn) <f,f^>)
+-- where
+-- f = \env v -> case env of <x1,...,xn> -> e x1 ... xn v
+-- f^ = \env v -> case env of Arr l xs1 ... xsn -> e^ l x1 ... xn v
+--
+buildClosure :: [TyVar] -> [VVar] -> Type -> Type -> VM VExpr -> VM VExpr
+buildClosure tvs vars arg_ty res_ty mk_body
+ = do
+ (env_ty, env, bind) <- buildEnv vars
+ env_bndr <- newLocalVVar (fsLit "env") env_ty
+ arg_bndr <- newLocalVVar (fsLit "arg") arg_ty
+
+ fn <- hoistPolyVExpr tvs (Inline 2)
+ $ do
+ lc <- builtin liftingContext
+ body <- mk_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 :: [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
+
+ (lenv_tc, lenv_tyargs) <- pdataReprTyCon ty
+
+ 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
+