2 collectAnnTypeBinders, collectAnnTypeArgs, isAnnTypeArg,
4 dataConTagZ, mkDataConTag, mkDataConTagLit,
9 mkPADictType, mkPArrayType, mkPReprType,
11 parrayReprTyCon, parrayReprDataCon, mkVScrut,
13 paDictArgType, paDictOfType, paDFunType,
14 paMethod, mkPR, lengthPA, replicatePA, emptyPA, packPA, combinePA, liftPA,
15 zipScalars, scalarClosure,
16 polyAbstract, polyApply, polyVApply,
17 hoistBinding, hoistExpr, hoistPolyVExpr, takeHoisted,
18 buildClosure, buildClosures,
25 import MkCore ( mkCoreTup, mkCoreTupTy, mkWildCase )
34 import MkId ( unwrapFamInstScrut )
36 import BasicTypes ( Boxity(..) )
37 import Literal ( Literal, mkMachInt )
45 collectAnnTypeArgs :: AnnExpr b ann -> (AnnExpr b ann, [Type])
46 collectAnnTypeArgs expr = go expr []
48 go (_, AnnApp f (_, AnnType ty)) tys = go f (ty : tys)
51 collectAnnTypeBinders :: AnnExpr Var ann -> ([Var], AnnExpr Var ann)
52 collectAnnTypeBinders expr = go [] expr
54 go bs (_, AnnLam b e) | isTyVar b = go (b:bs) e
55 go bs e = (reverse bs, e)
57 collectAnnValBinders :: AnnExpr Var ann -> ([Var], AnnExpr Var ann)
58 collectAnnValBinders expr = go [] expr
60 go bs (_, AnnLam b e) | isId b = go (b:bs) e
61 go bs e = (reverse bs, e)
63 isAnnTypeArg :: AnnExpr b ann -> Bool
64 isAnnTypeArg (_, AnnType _) = True
65 isAnnTypeArg _ = False
67 dataConTagZ :: DataCon -> Int
68 dataConTagZ con = dataConTag con - fIRST_TAG
70 mkDataConTagLit :: DataCon -> Literal
71 mkDataConTagLit = mkMachInt . toInteger . dataConTagZ
73 mkDataConTag :: DataCon -> CoreExpr
74 mkDataConTag = mkIntLitInt . dataConTagZ
76 splitPrimTyCon :: Type -> Maybe TyCon
78 | Just (tycon, []) <- splitTyConApp_maybe ty
84 mkBuiltinTyConApp :: (Builtins -> TyCon) -> [Type] -> VM Type
85 mkBuiltinTyConApp get_tc tys
88 return $ mkTyConApp tc tys
90 mkBuiltinTyConApps :: (Builtins -> TyCon) -> [Type] -> Type -> VM Type
91 mkBuiltinTyConApps get_tc tys ty
94 return $ foldr (mk tc) ty tys
96 mk tc ty1 ty2 = mkTyConApp tc [ty1,ty2]
99 mkBuiltinTyConApps1 :: (Builtins -> TyCon) -> Type -> [Type] -> VM Type
100 mkBuiltinTyConApps1 _ dft [] = return dft
101 mkBuiltinTyConApps1 get_tc _ tys
105 [] -> pprPanic "mkBuiltinTyConApps1" (ppr tc)
106 _ -> return $ foldr1 (mk tc) tys
108 mk tc ty1 ty2 = mkTyConApp tc [ty1,ty2]
110 mkClosureType :: Type -> Type -> VM Type
111 mkClosureType arg_ty res_ty = mkBuiltinTyConApp closureTyCon [arg_ty, res_ty]
114 mkClosureTypes :: [Type] -> Type -> VM Type
115 mkClosureTypes = mkBuiltinTyConApps closureTyCon
117 mkPReprType :: Type -> VM Type
118 mkPReprType ty = mkBuiltinTyConApp preprTyCon [ty]
120 mkPADictType :: Type -> VM Type
121 mkPADictType ty = mkBuiltinTyConApp paTyCon [ty]
123 mkPArrayType :: Type -> VM Type
125 | Just tycon <- splitPrimTyCon ty
127 r <- lookupPrimPArray tycon
129 Just arr -> return $ mkTyConApp arr []
130 Nothing -> cantVectorise "Primitive tycon not vectorised" (ppr tycon)
131 mkPArrayType ty = mkBuiltinTyConApp parrayTyCon [ty]
133 mkBuiltinCo :: (Builtins -> TyCon) -> VM Coercion
137 return $ mkTyConApp tc []
139 parrayReprTyCon :: Type -> VM (TyCon, [Type])
140 parrayReprTyCon ty = builtin parrayTyCon >>= (`lookupFamInst` [ty])
142 parrayReprDataCon :: Type -> VM (DataCon, [Type])
145 (tc, arg_tys) <- parrayReprTyCon ty
146 let [dc] = tyConDataCons tc
149 mkVScrut :: VExpr -> VM (VExpr, TyCon, [Type])
152 (tc, arg_tys) <- parrayReprTyCon (exprType ve)
153 return ((ve, unwrapFamInstScrut tc arg_tys le), tc, arg_tys)
155 prDFunOfTyCon :: TyCon -> VM CoreExpr
158 . maybeCantVectoriseM "No PR dictionary for tycon" (ppr tycon)
159 $ lookupTyConPR tycon
161 paDictArgType :: TyVar -> VM (Maybe Type)
162 paDictArgType tv = go (TyVarTy tv) (tyVarKind tv)
164 go ty k | Just k' <- kindView k = go ty k'
167 tv <- newTyVar (fsLit "a") k1
168 mty1 <- go (TyVarTy tv) k1
171 mty2 <- go (AppTy ty (TyVarTy tv)) k2
172 return $ fmap (ForAllTy tv . FunTy ty1) mty2
177 = liftM Just (mkPADictType ty)
179 go _ _ = return Nothing
181 paDictOfType :: Type -> VM CoreExpr
182 paDictOfType ty = paDictOfTyApp ty_fn ty_args
184 (ty_fn, ty_args) = splitAppTys ty
186 paDictOfTyApp :: Type -> [Type] -> VM CoreExpr
187 paDictOfTyApp ty_fn ty_args
188 | Just ty_fn' <- coreView ty_fn = paDictOfTyApp ty_fn' ty_args
189 paDictOfTyApp (TyVarTy tv) ty_args
191 dfun <- maybeV (lookupTyVarPA tv)
192 paDFunApply dfun ty_args
193 paDictOfTyApp (TyConApp tc _) ty_args
195 dfun <- maybeCantVectoriseM "No PA dictionary for tycon" (ppr tc)
197 paDFunApply (Var dfun) ty_args
199 = cantVectorise "Can't construct PA dictionary for type" (ppr ty)
201 paDFunType :: TyCon -> VM Type
204 margs <- mapM paDictArgType tvs
205 res <- mkPADictType (mkTyConApp tc arg_tys)
206 return . mkForAllTys tvs
207 $ mkFunTys [arg | Just arg <- margs] res
210 arg_tys = mkTyVarTys tvs
212 paDFunApply :: CoreExpr -> [Type] -> VM CoreExpr
215 dicts <- mapM paDictOfType tys
216 return $ mkApps (mkTyApps dfun tys) dicts
218 type PAMethod = (Builtins -> Var, String)
220 pa_length, pa_replicate, pa_empty, pa_pack :: (Builtins -> Var, String)
221 pa_length = (lengthPAVar, "lengthPA")
222 pa_replicate = (replicatePAVar, "replicatePA")
223 pa_empty = (emptyPAVar, "emptyPA")
224 pa_pack = (packPAVar, "packPA")
226 paMethod :: PAMethod -> Type -> VM CoreExpr
227 paMethod (_method, name) ty
228 | Just tycon <- splitPrimTyCon ty
230 . maybeCantVectoriseM "No PA method" (text name <+> text "for" <+> ppr tycon)
231 $ lookupPrimMethod tycon name
233 paMethod (method, _name) ty
236 dict <- paDictOfType ty
237 return $ mkApps (Var fn) [Type ty, dict]
239 mkPR :: Type -> VM CoreExpr
242 fn <- builtin mkPRVar
243 dict <- paDictOfType ty
244 return $ mkApps (Var fn) [Type ty, dict]
246 lengthPA :: Type -> CoreExpr -> VM CoreExpr
247 lengthPA ty x = liftM (`App` x) (paMethod pa_length ty)
249 replicatePA :: CoreExpr -> CoreExpr -> VM CoreExpr
250 replicatePA len x = liftM (`mkApps` [len,x])
251 (paMethod pa_replicate (exprType x))
253 emptyPA :: Type -> VM CoreExpr
254 emptyPA = paMethod pa_empty
256 packPA :: Type -> CoreExpr -> CoreExpr -> CoreExpr -> VM CoreExpr
257 packPA ty xs len sel = liftM (`mkApps` [xs, len, sel])
258 (paMethod pa_pack ty)
260 combinePA :: Type -> CoreExpr -> CoreExpr -> CoreExpr -> [CoreExpr]
262 combinePA ty len sel is xs
263 = liftM (`mkApps` (len : sel : is : xs))
264 (paMethod (combinePAVar n, "combine" ++ show n ++ "PA") ty)
268 liftPA :: CoreExpr -> VM CoreExpr
271 lc <- builtin liftingContext
272 replicatePA (Var lc) x
274 zipScalars :: [Type] -> Type -> VM CoreExpr
275 zipScalars arg_tys res_ty
277 scalar <- builtin scalarClass
278 (dfuns, _) <- mapAndUnzipM (\ty -> lookupInst scalar [ty]) ty_args
279 zipf <- builtin (scalarZip $ length arg_tys)
280 return $ Var zipf `mkTyApps` ty_args `mkApps` map Var dfuns
282 ty_args = arg_tys ++ [res_ty]
284 scalarClosure :: [Type] -> Type -> CoreExpr -> CoreExpr -> VM CoreExpr
285 scalarClosure arg_tys res_ty scalar_fun array_fun
287 ctr <- builtin (closureCtrFun $ length arg_tys)
288 pas <- mapM paDictOfType (init arg_tys)
289 return $ Var ctr `mkTyApps` (arg_tys ++ [res_ty])
290 `mkApps` (pas ++ [scalar_fun, array_fun])
292 newLocalVVar :: FastString -> Type -> VM VVar
295 lty <- mkPArrayType vty
296 vv <- newLocalVar fs vty
297 lv <- newLocalVar fs lty
300 polyAbstract :: [TyVar] -> ((CoreExpr -> CoreExpr) -> VM a) -> VM a
304 mdicts <- mapM mk_dict_var tvs
305 zipWithM_ (\tv -> maybe (defLocalTyVar tv) (defLocalTyVarWithPA tv . Var)) tvs mdicts
309 r <- paDictArgType tv
311 Just ty -> liftM Just (newLocalVar (fsLit "dPA") ty)
312 Nothing -> return Nothing
314 mk_lams mdicts = mkLams (tvs ++ [dict | Just dict <- mdicts])
316 polyApply :: CoreExpr -> [Type] -> VM CoreExpr
319 dicts <- mapM paDictOfType tys
320 return $ expr `mkTyApps` tys `mkApps` dicts
322 polyVApply :: VExpr -> [Type] -> VM VExpr
325 dicts <- mapM paDictOfType tys
326 return $ mapVect (\e -> e `mkTyApps` tys `mkApps` dicts) expr
328 hoistBinding :: Var -> CoreExpr -> VM ()
329 hoistBinding v e = updGEnv $ \env ->
330 env { global_bindings = (v,e) : global_bindings env }
332 hoistExpr :: FastString -> CoreExpr -> VM Var
335 var <- newLocalVar fs (exprType expr)
336 hoistBinding var expr
339 hoistVExpr :: VExpr -> VM VVar
343 vv <- hoistExpr ('v' `consFS` fs) ve
344 lv <- hoistExpr ('l' `consFS` fs) le
347 hoistPolyVExpr :: [TyVar] -> VM VExpr -> VM VExpr
350 expr <- closedV . polyAbstract tvs $ \abstract ->
351 liftM (mapVect abstract) p
352 fn <- hoistVExpr expr
353 polyVApply (vVar fn) (mkTyVarTys tvs)
355 takeHoisted :: VM [(Var, CoreExpr)]
359 setGEnv $ env { global_bindings = [] }
360 return $ global_bindings env
363 boxExpr :: Type -> VExpr -> VM VExpr
364 boxExpr ty (vexpr, lexpr)
365 | Just (tycon, []) <- splitTyConApp_maybe ty
366 , isUnLiftedTyCon tycon
368 r <- lookupBoxedTyCon tycon
370 Just tycon' -> let [dc] = tyConDataCons tycon'
372 return (mkConApp dc [vexpr], lexpr)
373 Nothing -> return (vexpr, lexpr)
376 mkClosure :: Type -> Type -> Type -> VExpr -> VExpr -> VM VExpr
377 mkClosure arg_ty res_ty env_ty (vfn,lfn) (venv,lenv)
379 dict <- paDictOfType env_ty
380 mkv <- builtin mkClosureVar
381 mkl <- builtin mkClosurePVar
382 return (Var mkv `mkTyApps` [arg_ty, res_ty, env_ty] `mkApps` [dict, vfn, lfn, venv],
383 Var mkl `mkTyApps` [arg_ty, res_ty, env_ty] `mkApps` [dict, vfn, lfn, lenv])
385 mkClosureApp :: Type -> Type -> VExpr -> VExpr -> VM VExpr
386 mkClosureApp arg_ty res_ty (vclo, lclo) (varg, larg)
388 vapply <- builtin applyClosureVar
389 lapply <- builtin applyClosurePVar
390 return (Var vapply `mkTyApps` [arg_ty, res_ty] `mkApps` [vclo, varg],
391 Var lapply `mkTyApps` [arg_ty, res_ty] `mkApps` [lclo, larg])
393 buildClosures :: [TyVar] -> [VVar] -> [Type] -> Type -> VM VExpr -> VM VExpr
394 buildClosures _ _ [] _ mk_body
396 buildClosures tvs vars [arg_ty] res_ty mk_body
397 = liftM vInlineMe (buildClosure tvs vars arg_ty res_ty mk_body)
398 buildClosures tvs vars (arg_ty : arg_tys) res_ty mk_body
400 res_ty' <- mkClosureTypes arg_tys res_ty
401 arg <- newLocalVVar (fsLit "x") arg_ty
403 . buildClosure tvs vars arg_ty res_ty'
406 lc <- builtin liftingContext
407 clo <- buildClosures tvs (vars ++ [arg]) arg_tys res_ty mk_body
408 return $ vLams lc (vars ++ [arg]) clo
410 -- (clo <x1,...,xn> <f,f^>, aclo (Arr lc xs1 ... xsn) <f,f^>)
412 -- f = \env v -> case env of <x1,...,xn> -> e x1 ... xn v
413 -- f^ = \env v -> case env of Arr l xs1 ... xsn -> e^ l x1 ... xn v
415 buildClosure :: [TyVar] -> [VVar] -> Type -> Type -> VM VExpr -> VM VExpr
416 buildClosure tvs vars arg_ty res_ty mk_body
418 (env_ty, env, bind) <- buildEnv vars
419 env_bndr <- newLocalVVar (fsLit "env") env_ty
420 arg_bndr <- newLocalVVar (fsLit "arg") arg_ty
422 fn <- hoistPolyVExpr tvs
424 lc <- builtin liftingContext
426 body' <- bind (vVar env_bndr)
427 (vVarApps lc body (vars ++ [arg_bndr]))
428 return . vInlineMe $ vLamsWithoutLC [env_bndr, arg_bndr] body'
430 mkClosure arg_ty res_ty env_ty fn env
432 buildEnv :: [VVar] -> VM (Type, VExpr, VExpr -> VExpr -> VM VExpr)
435 lc <- builtin liftingContext
436 let (ty, venv, vbind) = mkVectEnv tys vs
437 (lenv, lbind) <- mkLiftEnv lc tys ls
438 return (ty, (venv, lenv),
439 \(venv,lenv) (vbody,lbody) ->
441 let vbody' = vbind venv vbody
442 lbody' <- lbind lenv lbody
443 return (vbody', lbody'))
448 mkVectEnv :: [Type] -> [Var] -> (Type, CoreExpr, CoreExpr -> CoreExpr -> CoreExpr)
449 mkVectEnv [] [] = (unitTy, Var unitDataConId, \_ body -> body)
450 mkVectEnv [ty] [v] = (ty, Var v, \env body -> Let (NonRec v env) body)
451 mkVectEnv tys vs = (ty, mkCoreTup (map Var vs),
452 \env body -> mkWildCase env ty (exprType body)
453 [(DataAlt (tupleCon Boxed (length vs)), vs, body)])
457 mkLiftEnv :: Var -> [Type] -> [Var] -> VM (CoreExpr, CoreExpr -> CoreExpr -> VM CoreExpr)
458 mkLiftEnv lc [ty] [v]
459 = return (Var v, \env body ->
461 len <- lengthPA ty (Var v)
462 return . Let (NonRec v env)
463 $ Case len lc (exprType body) [(DEFAULT, [], body)])
465 -- NOTE: this transparently deals with empty environments
468 (env_tc, env_tyargs) <- parrayReprTyCon vty
470 bndrs <- if null vs then do
471 v <- newDummyVar unitTy
474 let [env_con] = tyConDataCons env_tc
476 env = Var (dataConWrapId env_con)
477 `mkTyApps` env_tyargs
478 `mkApps` (Var lc : args)
480 bind env body = let scrut = unwrapFamInstScrut env_tc env_tyargs env
482 return $ mkWildCase scrut (exprType scrut)
484 [(DataAlt env_con, lc : bndrs, body)]
487 vty = mkCoreTupTy tys
489 args | null vs = [Var unitDataConId]
490 | otherwise = map Var vs