-module VectType ( vectTyCon, vectType )
+module VectType ( vectTyCon, vectType, vectTypeEnv,
+ PAInstance, buildPADict )
where
#include "HsVersions.h"
import VectMonad
import VectUtils
+import VectCore
+import HscTypes ( TypeEnv, extendTypeEnvList, typeEnvTyCons )
+import CoreSyn
+import CoreUtils
+import BuildTyCl
+import DataCon
import TyCon
import Type
import TypeRep
+import Coercion
+import FamInstEnv ( FamInst, mkLocalFamInst )
+import InstEnv ( Instance, mkLocalInstance, instanceDFunId )
+import OccName
+import MkId
+import BasicTypes ( StrictnessMark(..), OverlapFlag(..), boolToRecFlag )
+import Var ( Var )
+import Id ( mkWildId )
+import Name ( Name, getOccName )
+import NameEnv
+import TysWiredIn ( unitTy, intTy, intDataCon )
+import TysPrim ( intPrimTy )
+
+import Unique
+import UniqFM
+import UniqSet
+import Digraph ( SCC(..), stronglyConnComp )
import Outputable
-import Control.Monad ( liftM2 )
+import Control.Monad ( liftM, liftM2, zipWithM, zipWithM_ )
+import Data.List ( inits, tails, zipWith4, zipWith5 )
-- ----------------------------------------------------------------------------
-- Types
vectType ty = pprPanic "vectType:" (ppr ty)
+-- ----------------------------------------------------------------------------
+-- Type definitions
+
+type TyConGroup = ([TyCon], UniqSet TyCon)
+
+data PAInstance = PAInstance {
+ painstDFun :: Var
+ , painstOrigTyCon :: TyCon
+ , painstVectTyCon :: TyCon
+ , painstArrTyCon :: TyCon
+ }
+
+vectTypeEnv :: TypeEnv -> VM (TypeEnv, [FamInst], [(Var, CoreExpr)])
+vectTypeEnv env
+ = do
+ cs <- readGEnv $ mk_map . global_tycons
+ let (conv_tcs, keep_tcs) = classifyTyCons cs groups
+ keep_dcs = concatMap tyConDataCons keep_tcs
+ zipWithM_ defTyCon keep_tcs keep_tcs
+ zipWithM_ defDataCon keep_dcs keep_dcs
+ new_tcs <- vectTyConDecls conv_tcs
+
+ let orig_tcs = keep_tcs ++ conv_tcs
+ vect_tcs = keep_tcs ++ new_tcs
+
+ repr_tcs <- zipWithM buildPReprTyCon orig_tcs vect_tcs
+ parr_tcs <- zipWithM buildPArrayTyCon orig_tcs vect_tcs
+ dfuns <- mapM mkPADFun vect_tcs
+ defTyConPAs (zip vect_tcs dfuns)
+ binds <- sequence (zipWith5 buildTyConBindings orig_tcs
+ vect_tcs
+ repr_tcs
+ parr_tcs
+ dfuns)
+
+ let all_new_tcs = new_tcs ++ repr_tcs ++ parr_tcs
+
+ let new_env = extendTypeEnvList env
+ (map ATyCon all_new_tcs
+ ++ [ADataCon dc | tc <- all_new_tcs
+ , dc <- tyConDataCons tc])
+
+ return (new_env, map mkLocalFamInst (repr_tcs ++ parr_tcs), concat binds)
+ where
+ tycons = typeEnvTyCons env
+ groups = tyConGroups tycons
+
+ mk_map env = listToUFM_Directly [(u, getUnique n /= u) | (u,n) <- nameEnvUniqueElts env]
+
+ keep_tc tc = let dcs = tyConDataCons tc
+ in
+ defTyCon tc tc >> zipWithM_ defDataCon dcs dcs
+
+
+vectTyConDecls :: [TyCon] -> VM [TyCon]
+vectTyConDecls tcs = fixV $ \tcs' ->
+ do
+ mapM_ (uncurry defTyCon) (lazy_zip tcs tcs')
+ mapM vectTyConDecl tcs
+ where
+ lazy_zip [] _ = []
+ lazy_zip (x:xs) ~(y:ys) = (x,y) : lazy_zip xs ys
+
+vectTyConDecl :: TyCon -> VM TyCon
+vectTyConDecl tc
+ = do
+ name' <- cloneName mkVectTyConOcc name
+ rhs' <- vectAlgTyConRhs (algTyConRhs tc)
+
+ liftDs $ buildAlgTyCon name'
+ tyvars
+ [] -- no stupid theta
+ rhs'
+ rec_flag -- FIXME: is this ok?
+ False -- FIXME: no generics
+ False -- not GADT syntax
+ Nothing -- not a family instance
+ where
+ name = tyConName tc
+ tyvars = tyConTyVars tc
+ rec_flag = boolToRecFlag (isRecursiveTyCon tc)
+
+vectAlgTyConRhs :: AlgTyConRhs -> VM AlgTyConRhs
+vectAlgTyConRhs (DataTyCon { data_cons = data_cons
+ , is_enum = is_enum
+ })
+ = do
+ data_cons' <- mapM vectDataCon data_cons
+ zipWithM_ defDataCon data_cons data_cons'
+ return $ DataTyCon { data_cons = data_cons'
+ , is_enum = is_enum
+ }
+
+vectDataCon :: DataCon -> VM DataCon
+vectDataCon dc
+ | not . null $ dataConExTyVars dc = pprPanic "vectDataCon: existentials" (ppr dc)
+ | not . null $ dataConEqSpec dc = pprPanic "vectDataCon: eq spec" (ppr dc)
+ | otherwise
+ = do
+ name' <- cloneName mkVectDataConOcc name
+ tycon' <- vectTyCon tycon
+ arg_tys <- mapM vectType rep_arg_tys
+
+ liftDs $ buildDataCon name'
+ False -- not infix
+ (map (const NotMarkedStrict) arg_tys)
+ [] -- no labelled fields
+ univ_tvs
+ [] -- no existential tvs for now
+ [] -- no eq spec for now
+ [] -- no context
+ arg_tys
+ tycon'
+ where
+ name = dataConName dc
+ univ_tvs = dataConUnivTyVars dc
+ rep_arg_tys = dataConRepArgTys dc
+ tycon = dataConTyCon dc
+
+mk_fam_inst :: TyCon -> TyCon -> (TyCon, [Type])
+mk_fam_inst fam_tc arg_tc
+ = (fam_tc, [mkTyConApp arg_tc . mkTyVarTys $ tyConTyVars arg_tc])
+
+buildPReprTyCon :: TyCon -> TyCon -> VM TyCon
+buildPReprTyCon orig_tc vect_tc
+ = do
+ name <- cloneName mkPReprTyConOcc (tyConName orig_tc)
+ rhs_ty <- buildPReprType vect_tc
+ prepr_tc <- builtin preprTyCon
+ liftDs $ buildSynTyCon name
+ tyvars
+ (SynonymTyCon rhs_ty)
+ (Just $ mk_fam_inst prepr_tc vect_tc)
+ where
+ tyvars = tyConTyVars vect_tc
+
+buildPReprType :: TyCon -> VM Type
+buildPReprType = mkPRepr . map dataConRepArgTys . tyConDataCons
+
+buildToPRepr :: Shape -> TyCon -> TyCon -> TyCon -> VM CoreExpr
+buildToPRepr _ vect_tc prepr_tc _
+ = do
+ arg <- newLocalVar FSLIT("x") arg_ty
+ bndrss <- mapM (mapM (newLocalVar FSLIT("x"))) rep_tys
+ (alt_bodies, res_ty) <- mkToPRepr $ map (map Var) bndrss
+
+ return . Lam arg
+ . wrapFamInstBody prepr_tc var_tys
+ . Case (Var arg) (mkWildId arg_ty) res_ty
+ $ zipWith3 mk_alt data_cons bndrss alt_bodies
+ where
+ var_tys = mkTyVarTys $ tyConTyVars vect_tc
+ arg_ty = mkTyConApp vect_tc var_tys
+ data_cons = tyConDataCons vect_tc
+ rep_tys = map dataConRepArgTys data_cons
+
+ mk_alt data_con bndrs body = (DataAlt data_con, bndrs, body)
+
+buildFromPRepr :: Shape -> TyCon -> TyCon -> TyCon -> VM CoreExpr
+buildFromPRepr _ vect_tc prepr_tc _
+ = do
+ arg_ty <- mkPReprType res_ty
+ arg <- newLocalVar FSLIT("x") arg_ty
+ alts <- mapM mk_alt data_cons
+ body <- mkFromPRepr (unwrapFamInstScrut prepr_tc var_tys (Var arg))
+ res_ty alts
+ return $ Lam arg body
+ where
+ var_tys = mkTyVarTys $ tyConTyVars vect_tc
+ res_ty = mkTyConApp vect_tc var_tys
+ data_cons = tyConDataCons vect_tc
+
+ mk_alt dc = do
+ bndrs <- mapM (newLocalVar FSLIT("x")) $ dataConRepArgTys dc
+ return (bndrs, mkConApp dc (map Type var_tys ++ map Var bndrs))
+
+buildPRDict :: Shape -> TyCon -> TyCon -> TyCon -> VM CoreExpr
+buildPRDict _ vect_tc prepr_tc _
+ = prCoerce prepr_tc var_tys
+ =<< prDictOfType (mkTyConApp prepr_tc var_tys)
+ where
+ var_tys = mkTyVarTys $ tyConTyVars vect_tc
+
+buildPArrayTyCon :: TyCon -> TyCon -> VM TyCon
+buildPArrayTyCon orig_tc vect_tc = fixV $ \repr_tc ->
+ do
+ name' <- cloneName mkPArrayTyConOcc orig_name
+ rhs <- buildPArrayTyConRhs orig_name vect_tc repr_tc
+ parray <- builtin parrayTyCon
+
+ liftDs $ buildAlgTyCon name'
+ tyvars
+ [] -- no stupid theta
+ rhs
+ rec_flag -- FIXME: is this ok?
+ False -- FIXME: no generics
+ False -- not GADT syntax
+ (Just $ mk_fam_inst parray vect_tc)
+ where
+ orig_name = tyConName orig_tc
+ tyvars = tyConTyVars vect_tc
+ rec_flag = boolToRecFlag (isRecursiveTyCon vect_tc)
+
+
+buildPArrayTyConRhs :: Name -> TyCon -> TyCon -> VM AlgTyConRhs
+buildPArrayTyConRhs orig_name vect_tc repr_tc
+ = do
+ data_con <- buildPArrayDataCon orig_name vect_tc repr_tc
+ return $ DataTyCon { data_cons = [data_con], is_enum = False }
+
+buildPArrayDataCon :: Name -> TyCon -> TyCon -> VM DataCon
+buildPArrayDataCon orig_name vect_tc repr_tc
+ = do
+ dc_name <- cloneName mkPArrayDataConOcc orig_name
+ shape <- tyConShape vect_tc
+ repr_tys <- mapM mkPArrayType types
+
+ liftDs $ buildDataCon dc_name
+ False -- not infix
+ (shapeStrictness shape ++ map (const NotMarkedStrict) repr_tys)
+ [] -- no field labels
+ (tyConTyVars vect_tc)
+ [] -- no existentials
+ [] -- no eq spec
+ [] -- no context
+ (shapeReprTys shape ++ repr_tys)
+ repr_tc
+ where
+ types = [ty | dc <- tyConDataCons vect_tc
+ , ty <- dataConRepArgTys dc]
+
+mkPADFun :: TyCon -> VM Var
+mkPADFun vect_tc
+ = newExportedVar (mkPADFunOcc $ getOccName vect_tc) =<< paDFunType vect_tc
+
+data Shape = Shape {
+ shapeReprTys :: [Type]
+ , shapeStrictness :: [StrictnessMark]
+ , shapeLength :: [CoreExpr] -> VM CoreExpr
+ , shapeReplicate :: CoreExpr -> CoreExpr -> VM [CoreExpr]
+ }
+
+tyConShape :: TyCon -> VM Shape
+tyConShape vect_tc
+ | isProductTyCon vect_tc
+ = return $ Shape {
+ shapeReprTys = [intPrimTy]
+ , shapeStrictness = [NotMarkedStrict]
+ , shapeLength = \[len] -> return len
+ , shapeReplicate = \len _ -> return [len]
+ }
+
+ | otherwise
+ = do
+ repr_ty <- mkPArrayType intTy -- FIXME: we want to unbox this
+ return $ Shape {
+ shapeReprTys = [repr_ty]
+ , shapeStrictness = [MarkedStrict]
+ , shapeLength = \[sel] -> lengthPA sel
+ , shapeReplicate = \len n -> do
+ e <- replicatePA len n
+ return [e]
+ }
+
+buildTyConBindings :: TyCon -> TyCon -> TyCon -> TyCon -> Var
+ -> VM [(Var, CoreExpr)]
+buildTyConBindings orig_tc vect_tc prepr_tc arr_tc dfun
+ = do
+ shape <- tyConShape vect_tc
+ sequence_ (zipWith4 (vectDataConWorker shape vect_tc arr_tc arr_dc)
+ orig_dcs
+ vect_dcs
+ (inits repr_tys)
+ (tails repr_tys))
+ dict <- buildPADict shape vect_tc prepr_tc arr_tc dfun
+ binds <- takeHoisted
+ return $ (dfun, dict) : binds
+ where
+ orig_dcs = tyConDataCons orig_tc
+ vect_dcs = tyConDataCons vect_tc
+ [arr_dc] = tyConDataCons arr_tc
+
+ repr_tys = map dataConRepArgTys vect_dcs
+
+vectDataConWorker :: Shape -> TyCon -> TyCon -> DataCon
+ -> DataCon -> DataCon -> [[Type]] -> [[Type]]
+ -> VM ()
+vectDataConWorker shape vect_tc arr_tc arr_dc orig_dc vect_dc pre (dc_tys : post)
+ = do
+ clo <- closedV
+ . inBind orig_worker
+ . polyAbstract tvs $ \abstract ->
+ liftM (abstract . vectorised)
+ $ buildClosures tvs [] dc_tys res_ty (liftM2 (,) mk_vect mk_lift)
+
+ worker <- cloneId mkVectOcc orig_worker (exprType clo)
+ hoistBinding worker clo
+ defGlobalVar orig_worker worker
+ return ()
+ where
+ tvs = tyConTyVars vect_tc
+ arg_tys = mkTyVarTys tvs
+ res_ty = mkTyConApp vect_tc arg_tys
+
+ orig_worker = dataConWorkId orig_dc
+
+ mk_vect = return . mkConApp vect_dc $ map Type arg_tys
+ mk_lift = do
+ len <- newLocalVar FSLIT("n") intPrimTy
+ arr_tys <- mapM mkPArrayType dc_tys
+ args <- mapM (newLocalVar FSLIT("xs")) arr_tys
+ shapes <- shapeReplicate shape
+ (Var len)
+ (mkDataConTag vect_dc)
+
+ empty_pre <- mapM emptyPA (concat pre)
+ empty_post <- mapM emptyPA (concat post)
+
+ return . mkLams (len : args)
+ . wrapFamInstBody arr_tc arg_tys
+ . mkConApp arr_dc
+ $ map Type arg_tys ++ shapes
+ ++ empty_pre
+ ++ map Var args
+ ++ empty_post
+
+buildPADict :: Shape -> TyCon -> TyCon -> TyCon -> Var -> VM CoreExpr
+buildPADict shape vect_tc prepr_tc arr_tc dfun
+ = polyAbstract tvs $ \abstract ->
+ do
+ meth_binds <- mapM (mk_method shape) paMethods
+ let meth_exprs = map (Var . fst) meth_binds
+
+ pa_dc <- builtin paDataCon
+ let dict = mkConApp pa_dc (Type (mkTyConApp vect_tc arg_tys) : meth_exprs)
+ body = Let (Rec meth_binds) dict
+ return . mkInlineMe $ abstract body
+ where
+ tvs = tyConTyVars arr_tc
+ arg_tys = mkTyVarTys tvs
+
+ mk_method shape (name, build)
+ = localV
+ $ do
+ body <- build shape vect_tc prepr_tc arr_tc
+ var <- newLocalVar name (exprType body)
+ return (var, mkInlineMe body)
+
+paMethods = [(FSLIT("lengthPA"), buildLengthPA),
+ (FSLIT("replicatePA"), buildReplicatePA),
+ (FSLIT("toPRepr"), buildToPRepr),
+ (FSLIT("fromPRepr"), buildFromPRepr),
+ (FSLIT("dictPRepr"), buildPRDict)]
+
+buildLengthPA :: Shape -> TyCon -> TyCon -> TyCon -> VM CoreExpr
+buildLengthPA shape vect_tc _ arr_tc
+ = do
+ parr_ty <- mkPArrayType (mkTyConApp vect_tc arg_tys)
+ arg <- newLocalVar FSLIT("xs") parr_ty
+ shapes <- mapM (newLocalVar FSLIT("sh")) shape_tys
+ wilds <- mapM newDummyVar repr_tys
+ let scrut = unwrapFamInstScrut arr_tc arg_tys (Var arg)
+ scrut_ty = exprType scrut
+
+ body <- shapeLength shape (map Var shapes)
+
+ return . Lam arg
+ $ Case scrut (mkWildId scrut_ty) intPrimTy
+ [(DataAlt repr_dc, shapes ++ wilds, body)]
+ where
+ arg_tys = mkTyVarTys $ tyConTyVars arr_tc
+ [repr_dc] = tyConDataCons arr_tc
+
+ shape_tys = shapeReprTys shape
+ repr_tys = drop (length shape_tys) (dataConRepArgTys repr_dc)
+
+-- data T = C0 t1 ... tm
+-- ...
+-- Ck u1 ... un
+--
+-- data [:T:] = A ![:Int:] [:t1:] ... [:un:]
+--
+-- replicatePA :: Int# -> T -> [:T:]
+-- replicatePA n# t
+-- = let c = case t of
+-- C0 _ ... _ -> 0
+-- ...
+-- Ck _ ... _ -> k
+--
+-- xs1 = case t of
+-- C0 x1 _ ... _ -> replicatePA @t1 n# x1
+-- _ -> emptyPA @t1
+--
+-- ...
+--
+-- ysn = case t of
+-- Ck _ ... _ yn -> replicatePA @un n# yn
+-- _ -> emptyPA @un
+-- in
+-- A (replicatePA @Int n# c) xs1 ... ysn
+--
+--
+
+buildReplicatePA :: Shape -> TyCon -> TyCon -> TyCon -> VM CoreExpr
+buildReplicatePA shape vect_tc _ arr_tc
+ = do
+ len_var <- newLocalVar FSLIT("n") intPrimTy
+ val_var <- newLocalVar FSLIT("x") val_ty
+
+ let len = Var len_var
+ val = Var val_var
+
+ shape_reprs <- shapeReplicate shape len (ctr_num val)
+ reprs <- liftM concat $ mapM (mk_comp_arrs len val) vect_dcs
+
+ return . mkLams [len_var, val_var]
+ . wrapFamInstBody arr_tc arg_tys
+ $ mkConApp arr_dc (map Type arg_tys ++ shape_reprs ++ reprs)
+ where
+ arg_tys = mkTyVarTys (tyConTyVars arr_tc)
+ val_ty = mkTyConApp vect_tc arg_tys
+ wild = mkWildId val_ty
+ vect_dcs = tyConDataCons vect_tc
+ [arr_dc] = tyConDataCons arr_tc
+
+ ctr_num val = Case val wild intTy (zipWith ctr_num_alt vect_dcs [0..])
+ ctr_num_alt dc i = (DataAlt dc, map mkWildId (dataConRepArgTys dc),
+ mkConApp intDataCon [mkIntLitInt i])
+
+
+ mk_comp_arrs len val dc = let tys = dataConRepArgTys dc
+ wilds = map mkWildId tys
+ in
+ sequence (zipWith3 (mk_comp_arr len val dc)
+ tys (inits wilds) (tails wilds))
+
+ mk_comp_arr len val dc ty pre (_:post)
+ = do
+ var <- newLocalVar FSLIT("x") ty
+ rep <- replicatePA len (Var var)
+ empty <- emptyPA ty
+ arr_ty <- mkPArrayType ty
+
+ return $ Case val wild arr_ty
+ [(DEFAULT, [], empty), (DataAlt dc, pre ++ (var : post), rep)]
+
+-- | Split the given tycons into two sets depending on whether they have to be
+-- converted (first list) or not (second list). The first argument contains
+-- information about the conversion status of external tycons:
+--
+-- * tycons which have converted versions are mapped to True
+-- * tycons which are not changed by vectorisation are mapped to False
+-- * tycons which can't be converted are not elements of the map
+--
+classifyTyCons :: UniqFM Bool -> [TyConGroup] -> ([TyCon], [TyCon])
+classifyTyCons = classify [] []
+ where
+ classify conv keep cs [] = (conv, keep)
+ classify conv keep cs ((tcs, ds) : rs)
+ | can_convert && must_convert
+ = classify (tcs ++ conv) keep (cs `addListToUFM` [(tc,True) | tc <- tcs]) rs
+ | can_convert
+ = classify conv (tcs ++ keep) (cs `addListToUFM` [(tc,False) | tc <- tcs]) rs
+ | otherwise
+ = classify conv keep cs rs
+ where
+ refs = ds `delListFromUniqSet` tcs
+
+ can_convert = isNullUFM (refs `minusUFM` cs) && all convertable tcs
+ must_convert = foldUFM (||) False (intersectUFM_C const cs refs)
+
+ convertable tc = isDataTyCon tc && all isVanillaDataCon (tyConDataCons tc)
+
+-- | Compute mutually recursive groups of tycons in topological order
+--
+tyConGroups :: [TyCon] -> [TyConGroup]
+tyConGroups tcs = map mk_grp (stronglyConnComp edges)
+ where
+ edges = [((tc, ds), tc, uniqSetToList ds) | tc <- tcs
+ , let ds = tyConsOfTyCon tc]
+
+ mk_grp (AcyclicSCC (tc, ds)) = ([tc], ds)
+ mk_grp (CyclicSCC els) = (tcs, unionManyUniqSets dss)
+ where
+ (tcs, dss) = unzip els
+
+tyConsOfTyCon :: TyCon -> UniqSet TyCon
+tyConsOfTyCon
+ = tyConsOfTypes . concatMap dataConRepArgTys . tyConDataCons
+
+tyConsOfType :: Type -> UniqSet TyCon
+tyConsOfType ty
+ | Just ty' <- coreView ty = tyConsOfType ty'
+tyConsOfType (TyVarTy v) = emptyUniqSet
+tyConsOfType (TyConApp tc tys) = extend (tyConsOfTypes tys)
+ where
+ extend | isUnLiftedTyCon tc
+ || isTupleTyCon tc = id
+
+ | otherwise = (`addOneToUniqSet` tc)
+
+tyConsOfType (AppTy a b) = tyConsOfType a `unionUniqSets` tyConsOfType b
+tyConsOfType (FunTy a b) = (tyConsOfType a `unionUniqSets` tyConsOfType b)
+ `addOneToUniqSet` funTyCon
+tyConsOfType (ForAllTy _ ty) = tyConsOfType ty
+tyConsOfType other = pprPanic "ClosureConv.tyConsOfType" $ ppr other
+
+tyConsOfTypes :: [Type] -> UniqSet TyCon
+tyConsOfTypes = unionManyUniqSets . map tyConsOfType
+