module VectUtils (
- paDictArgType, paDictOfType
+ collectAnnTypeBinders, collectAnnTypeArgs, isAnnTypeArg,
+ collectAnnValBinders,
+ dataConTagZ, mkDataConTag, mkDataConTagLit,
+
+ newLocalVVar,
+
+ mkBuiltinCo, voidType, mkWrapType,
+ mkPADictType, mkPArrayType, mkPDataType, mkPReprType, mkPArray,
+ mkBuiltinTyConApps, mkClosureTypes,
+
+ pdataReprTyCon, pdataReprDataCon, mkVScrut,
+ prDictOfType, prDFunOfTyCon,
+ paDictArgType, paDictOfType, paDFunType,
+ paMethod, wrapPR, replicatePD, emptyPD, packByTagPD,
+ combinePD,
+ liftPD,
+ zipScalars, scalarClosure,
+ polyAbstract, polyApply, polyVApply, polyArity,
+ Inline(..), addInlineArity, inlineMe,
+ hoistBinding, hoistExpr, hoistPolyVExpr, takeHoisted,
) where
-#include "HsVersions.h"
-import VectMonad
+import Vectorise.Monad
+import Vectorise.Env
+import Vectorise.Vect
+import Vectorise.Builtins
import CoreSyn
+import CoreUtils
+import CoreUnfold ( mkInlineRule )
+import Coercion
import Type
import TypeRep
+import TyCon
+import DataCon
import Var
+import MkId ( unwrapFamInstScrut )
+import Id ( setIdUnfolding )
+import BasicTypes
+import Literal ( Literal, mkMachInt )
+
import Outputable
+import FastString
+
+import Control.Monad
+
+collectAnnTypeArgs :: AnnExpr b ann -> (AnnExpr b ann, [Type])
+collectAnnTypeArgs expr = go expr []
+ where
+ go (_, AnnApp f (_, AnnType ty)) tys = go f (ty : tys)
+ go e tys = (e, tys)
+
+collectAnnTypeBinders :: AnnExpr Var ann -> ([Var], AnnExpr Var ann)
+collectAnnTypeBinders expr = go [] expr
+ where
+ go bs (_, AnnLam b e) | isTyVar b = go (b:bs) e
+ go bs e = (reverse bs, e)
+
+collectAnnValBinders :: AnnExpr Var ann -> ([Var], AnnExpr Var ann)
+collectAnnValBinders expr = go [] expr
+ where
+ go bs (_, AnnLam b e) | isId b = go (b:bs) e
+ go bs e = (reverse bs, e)
+
+isAnnTypeArg :: AnnExpr b ann -> Bool
+isAnnTypeArg (_, AnnType _) = True
+isAnnTypeArg _ = False
+
+dataConTagZ :: DataCon -> Int
+dataConTagZ con = dataConTag con - fIRST_TAG
+
+mkDataConTagLit :: DataCon -> Literal
+mkDataConTagLit = mkMachInt . toInteger . dataConTagZ
+
+mkDataConTag :: DataCon -> CoreExpr
+mkDataConTag = mkIntLitInt . dataConTagZ
+
+splitPrimTyCon :: Type -> Maybe TyCon
+splitPrimTyCon ty
+ | Just (tycon, []) <- splitTyConApp_maybe ty
+ , isPrimTyCon tycon
+ = Just tycon
+
+ | otherwise = Nothing
+
+mkBuiltinTyConApp :: (Builtins -> TyCon) -> [Type] -> VM Type
+mkBuiltinTyConApp get_tc tys
+ = do
+ tc <- builtin get_tc
+ return $ mkTyConApp tc tys
+
+mkBuiltinTyConApps :: (Builtins -> TyCon) -> [Type] -> Type -> VM Type
+mkBuiltinTyConApps get_tc tys ty
+ = do
+ tc <- builtin get_tc
+ return $ foldr (mk tc) ty tys
+ where
+ mk tc ty1 ty2 = mkTyConApp tc [ty1,ty2]
+
+voidType :: VM Type
+voidType = mkBuiltinTyConApp 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 = 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, 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)
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
go ty k
| isLiftedTypeKind k
- = do
- tc <- builtin paDictTyCon
- return . Just $ TyConApp tc [ty]
+ = liftM Just (mkPADictType ty)
+
+ go _ _ = return Nothing
- go ty k = return Nothing
-paDictOfType :: Type -> VM CoreExpr
-paDictOfType ty = paDictOfTyApp ty_fn ty_args
+-- | Get the PA dictionary for some type, or `Nothing` if there isn't one.
+paDictOfType :: Type -> VM (Maybe CoreExpr)
+paDictOfType ty
+ = paDictOfTyApp ty_fn ty_args
where
(ty_fn, ty_args) = splitAppTys ty
-paDictOfTyApp :: Type -> [Type] -> VM CoreExpr
-paDictOfTyApp ty_fn ty_args
- | Just ty_fn' <- coreView ty_fn = paDictOfTyApp ty_fn' ty_args
-paDictOfTyApp (TyVarTy tv) ty_args
- = do
- dfun <- maybeV (lookupTyVarPA tv)
- paDFunApply dfun ty_args
-paDictOfTyApp (TyConApp tc _) ty_args
+ paDictOfTyApp :: Type -> [Type] -> VM (Maybe CoreExpr)
+ paDictOfTyApp ty_fn ty_args
+ | Just ty_fn' <- coreView ty_fn
+ = paDictOfTyApp ty_fn' ty_args
+
+ paDictOfTyApp (TyVarTy tv) ty_args
+ = do dfun <- maybeV (lookupTyVarPA tv)
+ liftM Just $ paDFunApply dfun ty_args
+
+ paDictOfTyApp (TyConApp tc _) ty_args
+ = do mdfun <- lookupTyConPA tc
+ case mdfun of
+ Nothing
+ -> pprTrace "VectUtils.paDictOfType"
+ (vcat [ text "No PA dictionary"
+ , text "for tycon: " <> ppr tc
+ , text "in type: " <> ppr ty])
+ $ return Nothing
+
+ Just dfun -> liftM Just $ paDFunApply (Var dfun) ty_args
+
+ paDictOfTyApp ty _
+ = cantVectorise "Can't construct PA dictionary for type" (ppr ty)
+
+
+
+paDFunType :: TyCon -> VM Type
+paDFunType tc
= 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)
+ 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
+ = do Just dicts <- liftM sequence $ mapM paDictOfType tys
+ return $ mkApps (mkTyApps dfun tys) dicts
+
+
+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
+ Just 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 paDictOfType tys
+ dicts <- mapM prDictOfType tys
return $ mkApps (mkTyApps dfun tys) dicts
+wrapPR :: Type -> VM CoreExpr
+wrapPR ty
+ = do
+ Just 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
+
+-- | Like `replicatePD` but use the lifting context in the vectoriser state.
+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)
+ Just pas <- liftM sequence $ 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 Just dicts <- liftM sequence $ mapM paDictOfType tys
+ return $ expr `mkTyApps` tys `mkApps` dicts
+
+polyVApply :: VExpr -> [Type] -> VM VExpr
+polyVApply expr tys
+ = do Just dicts <- liftM sequence $ mapM paDictOfType tys
+ return $ mapVect (\e -> e `mkTyApps` tys `mkApps` dicts) expr
+
+-- Inline ---------------------------------------------------------------------
+-- | Records whether we should inline a particular binding.
+data Inline
+ = Inline Arity
+ | DontInline
+
+-- | Add to the arity contained within an `Inline`, if any.
+addInlineArity :: Inline -> Int -> Inline
+addInlineArity (Inline m) n = Inline (m+n)
+addInlineArity DontInline _ = DontInline
+
+-- | Says to always inline a binding.
+inlineMe :: Inline
+inlineMe = Inline 0
+
+
+-- Hoising --------------------------------------------------------------------
+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 expr (Just 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)
+-}
+
+
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