Vectorise polymorphic let bindings
[ghc.git] / compiler / vectorise / VectType.hs
1 {-# OPTIONS -w #-}
2 -- The above warning supression flag is a temporary kludge.
3 -- While working on this module you are encouraged to remove it and fix
4 -- any warnings in the module. See
5 -- http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings
6 -- for details
7
8 module VectType ( vectTyCon, vectAndLiftType, vectType, vectTypeEnv,
9 mkRepr, arrShapeTys, arrShapeVars, arrSelector,
10 PAInstance, buildPADict,
11 fromVect )
12 where
13
14 import VectMonad
15 import VectUtils
16 import VectCore
17
18 import HscTypes ( TypeEnv, extendTypeEnvList, typeEnvTyCons )
19 import CoreSyn
20 import CoreUtils
21 import BuildTyCl
22 import DataCon
23 import TyCon
24 import Type
25 import TypeRep
26 import Coercion
27 import FamInstEnv ( FamInst, mkLocalFamInst )
28 import InstEnv ( Instance, mkLocalInstance, instanceDFunId )
29 import OccName
30 import MkId
31 import BasicTypes ( StrictnessMark(..), OverlapFlag(..), boolToRecFlag )
32 import Var ( Var, TyVar )
33 import Id ( mkWildId )
34 import Name ( Name, getOccName )
35 import NameEnv
36 import TysWiredIn
37 import TysPrim ( intPrimTy )
38
39 import Unique
40 import UniqFM
41 import UniqSet
42 import Util ( singleton )
43 import Digraph ( SCC(..), stronglyConnComp )
44
45 import Outputable
46 import FastString
47
48 import Control.Monad ( liftM, liftM2, zipWithM, zipWithM_, mapAndUnzipM )
49 import Data.List ( inits, tails, zipWith4, zipWith5 )
50
51 -- ----------------------------------------------------------------------------
52 -- Types
53
54 vectTyCon :: TyCon -> VM TyCon
55 vectTyCon tc
56 | isFunTyCon tc = builtin closureTyCon
57 | isBoxedTupleTyCon tc = return tc
58 | isUnLiftedTyCon tc = return tc
59 | otherwise = do
60 r <- lookupTyCon tc
61 case r of
62 Just tc' -> return tc'
63
64 -- FIXME: just for now
65 Nothing -> pprTrace "ccTyCon:" (ppr tc) $ return tc
66
67 vectAndLiftType :: Type -> VM (Type, Type)
68 vectAndLiftType ty | Just ty' <- coreView ty = vectAndLiftType ty'
69 vectAndLiftType ty
70 = do
71 mdicts <- mapM paDictArgType tyvars
72 let dicts = [dict | Just dict <- mdicts]
73 vmono_ty <- vectType mono_ty
74 lmono_ty <- mkPArrayType vmono_ty
75 return (abstractType tyvars dicts vmono_ty,
76 abstractType tyvars dicts lmono_ty)
77 where
78 (tyvars, mono_ty) = splitForAllTys ty
79
80
81 vectType :: Type -> VM Type
82 vectType ty | Just ty' <- coreView ty = vectType ty'
83 vectType (TyVarTy tv) = return $ TyVarTy tv
84 vectType (AppTy ty1 ty2) = liftM2 AppTy (vectType ty1) (vectType ty2)
85 vectType (TyConApp tc tys) = liftM2 TyConApp (vectTyCon tc) (mapM vectType tys)
86 vectType (FunTy ty1 ty2) = liftM2 TyConApp (builtin closureTyCon)
87 (mapM vectAndBoxType [ty1,ty2])
88 vectType ty@(ForAllTy _ _)
89 = do
90 mdicts <- mapM paDictArgType tyvars
91 mono_ty' <- vectType mono_ty
92 return $ abstractType tyvars [dict | Just dict <- mdicts] mono_ty'
93 where
94 (tyvars, mono_ty) = splitForAllTys ty
95
96 vectType ty = pprPanic "vectType:" (ppr ty)
97
98 vectAndBoxType :: Type -> VM Type
99 vectAndBoxType ty = vectType ty >>= boxType
100
101 abstractType :: [TyVar] -> [Type] -> Type -> Type
102 abstractType tyvars dicts = mkForAllTys tyvars . mkFunTys dicts
103
104 -- ----------------------------------------------------------------------------
105 -- Boxing
106
107 boxType :: Type -> VM Type
108 boxType ty
109 | Just (tycon, []) <- splitTyConApp_maybe ty
110 , isUnLiftedTyCon tycon
111 = do
112 r <- lookupBoxedTyCon tycon
113 case r of
114 Just tycon' -> return $ mkTyConApp tycon' []
115 Nothing -> return ty
116 boxType ty = return ty
117
118 -- ----------------------------------------------------------------------------
119 -- Type definitions
120
121 type TyConGroup = ([TyCon], UniqSet TyCon)
122
123 data PAInstance = PAInstance {
124 painstDFun :: Var
125 , painstOrigTyCon :: TyCon
126 , painstVectTyCon :: TyCon
127 , painstArrTyCon :: TyCon
128 }
129
130 vectTypeEnv :: TypeEnv -> VM (TypeEnv, [FamInst], [(Var, CoreExpr)])
131 vectTypeEnv env
132 = do
133 cs <- readGEnv $ mk_map . global_tycons
134 let (conv_tcs, keep_tcs) = classifyTyCons cs groups
135 keep_dcs = concatMap tyConDataCons keep_tcs
136 zipWithM_ defTyCon keep_tcs keep_tcs
137 zipWithM_ defDataCon keep_dcs keep_dcs
138 new_tcs <- vectTyConDecls conv_tcs
139
140 let orig_tcs = keep_tcs ++ conv_tcs
141 vect_tcs = keep_tcs ++ new_tcs
142
143 repr_tcs <- zipWithM buildPReprTyCon orig_tcs vect_tcs
144 parr_tcs <- zipWithM buildPArrayTyCon orig_tcs vect_tcs
145 dfuns <- mapM mkPADFun vect_tcs
146 defTyConPAs (zip vect_tcs dfuns)
147 binds <- sequence (zipWith5 buildTyConBindings orig_tcs
148 vect_tcs
149 repr_tcs
150 parr_tcs
151 dfuns)
152
153 let all_new_tcs = new_tcs ++ repr_tcs ++ parr_tcs
154
155 let new_env = extendTypeEnvList env
156 (map ATyCon all_new_tcs
157 ++ [ADataCon dc | tc <- all_new_tcs
158 , dc <- tyConDataCons tc])
159
160 return (new_env, map mkLocalFamInst (repr_tcs ++ parr_tcs), concat binds)
161 where
162 tycons = typeEnvTyCons env
163 groups = tyConGroups tycons
164
165 mk_map env = listToUFM_Directly [(u, getUnique n /= u) | (u,n) <- nameEnvUniqueElts env]
166
167 keep_tc tc = let dcs = tyConDataCons tc
168 in
169 defTyCon tc tc >> zipWithM_ defDataCon dcs dcs
170
171
172 vectTyConDecls :: [TyCon] -> VM [TyCon]
173 vectTyConDecls tcs = fixV $ \tcs' ->
174 do
175 mapM_ (uncurry defTyCon) (lazy_zip tcs tcs')
176 mapM vectTyConDecl tcs
177 where
178 lazy_zip [] _ = []
179 lazy_zip (x:xs) ~(y:ys) = (x,y) : lazy_zip xs ys
180
181 vectTyConDecl :: TyCon -> VM TyCon
182 vectTyConDecl tc
183 = do
184 name' <- cloneName mkVectTyConOcc name
185 rhs' <- vectAlgTyConRhs (algTyConRhs tc)
186
187 liftDs $ buildAlgTyCon name'
188 tyvars
189 [] -- no stupid theta
190 rhs'
191 rec_flag -- FIXME: is this ok?
192 False -- FIXME: no generics
193 False -- not GADT syntax
194 Nothing -- not a family instance
195 where
196 name = tyConName tc
197 tyvars = tyConTyVars tc
198 rec_flag = boolToRecFlag (isRecursiveTyCon tc)
199
200 vectAlgTyConRhs :: AlgTyConRhs -> VM AlgTyConRhs
201 vectAlgTyConRhs (DataTyCon { data_cons = data_cons
202 , is_enum = is_enum
203 })
204 = do
205 data_cons' <- mapM vectDataCon data_cons
206 zipWithM_ defDataCon data_cons data_cons'
207 return $ DataTyCon { data_cons = data_cons'
208 , is_enum = is_enum
209 }
210
211 vectDataCon :: DataCon -> VM DataCon
212 vectDataCon dc
213 | not . null $ dataConExTyVars dc = pprPanic "vectDataCon: existentials" (ppr dc)
214 | not . null $ dataConEqSpec dc = pprPanic "vectDataCon: eq spec" (ppr dc)
215 | otherwise
216 = do
217 name' <- cloneName mkVectDataConOcc name
218 tycon' <- vectTyCon tycon
219 arg_tys <- mapM vectType rep_arg_tys
220
221 liftDs $ buildDataCon name'
222 False -- not infix
223 (map (const NotMarkedStrict) arg_tys)
224 [] -- no labelled fields
225 univ_tvs
226 [] -- no existential tvs for now
227 [] -- no eq spec for now
228 [] -- no context
229 arg_tys
230 tycon'
231 where
232 name = dataConName dc
233 univ_tvs = dataConUnivTyVars dc
234 rep_arg_tys = dataConRepArgTys dc
235 tycon = dataConTyCon dc
236
237 mk_fam_inst :: TyCon -> TyCon -> (TyCon, [Type])
238 mk_fam_inst fam_tc arg_tc
239 = (fam_tc, [mkTyConApp arg_tc . mkTyVarTys $ tyConTyVars arg_tc])
240
241 buildPReprTyCon :: TyCon -> TyCon -> VM TyCon
242 buildPReprTyCon orig_tc vect_tc
243 = do
244 name <- cloneName mkPReprTyConOcc (tyConName orig_tc)
245 rhs_ty <- buildPReprType vect_tc
246 prepr_tc <- builtin preprTyCon
247 liftDs $ buildSynTyCon name
248 tyvars
249 (SynonymTyCon rhs_ty)
250 (Just $ mk_fam_inst prepr_tc vect_tc)
251 where
252 tyvars = tyConTyVars vect_tc
253
254
255 data Repr = ProdRepr {
256 prod_components :: [Type]
257 , prod_tycon :: TyCon
258 , prod_data_con :: DataCon
259 , prod_arr_tycon :: TyCon
260 , prod_arr_data_con :: DataCon
261 }
262
263 | SumRepr {
264 sum_components :: [Repr]
265 , sum_tycon :: TyCon
266 , sum_arr_tycon :: TyCon
267 , sum_arr_data_con :: DataCon
268 }
269
270 | IdRepr Type
271
272 | VoidRepr {
273 void_tycon :: TyCon
274 , void_bottom :: CoreExpr
275 }
276
277 | EnumRepr {
278 enum_tycon :: TyCon
279 , enum_data_con :: DataCon
280 , enum_arr_tycon :: TyCon
281 , enum_arr_data_con :: DataCon
282 }
283
284 voidRepr :: VM Repr
285 voidRepr
286 = do
287 tycon <- builtin voidTyCon
288 var <- builtin voidVar
289 return $ VoidRepr {
290 void_tycon = tycon
291 , void_bottom = Var var
292 }
293
294 enumRepr :: VM Repr
295 enumRepr
296 = do
297 tycon <- builtin enumerationTyCon
298 let [data_con] = tyConDataCons tycon
299 (arr_tycon, _) <- parrayReprTyCon (mkTyConApp tycon [])
300 let [arr_data_con] = tyConDataCons arr_tycon
301
302 return $ EnumRepr {
303 enum_tycon = tycon
304 , enum_data_con = data_con
305 , enum_arr_tycon = arr_tycon
306 , enum_arr_data_con = arr_data_con
307 }
308
309 unboxedProductRepr :: [Type] -> VM Repr
310 unboxedProductRepr [] = voidRepr
311 unboxedProductRepr [ty] = return $ IdRepr ty
312 unboxedProductRepr tys = boxedProductRepr tys
313
314 boxedProductRepr :: [Type] -> VM Repr
315 boxedProductRepr tys
316 = do
317 tycon <- builtin (prodTyCon arity)
318 let [data_con] = tyConDataCons tycon
319
320 tys' <- mapM boxType tys
321 (arr_tycon, _) <- parrayReprTyCon $ mkTyConApp tycon tys'
322 let [arr_data_con] = tyConDataCons arr_tycon
323
324 return $ ProdRepr {
325 prod_components = tys
326 , prod_tycon = tycon
327 , prod_data_con = data_con
328 , prod_arr_tycon = arr_tycon
329 , prod_arr_data_con = arr_data_con
330 }
331 where
332 arity = length tys
333
334 sumRepr :: [Repr] -> VM Repr
335 sumRepr [] = voidRepr
336 sumRepr [repr] = boxRepr repr
337 sumRepr reprs
338 = do
339 tycon <- builtin (sumTyCon arity)
340 (arr_tycon, _) <- parrayReprTyCon
341 . mkTyConApp tycon
342 $ map reprType reprs
343
344 let [arr_data_con] = tyConDataCons arr_tycon
345
346 return $ SumRepr {
347 sum_components = reprs
348 , sum_tycon = tycon
349 , sum_arr_tycon = arr_tycon
350 , sum_arr_data_con = arr_data_con
351 }
352 where
353 arity = length reprs
354
355 splitSumRepr :: Repr -> [Repr]
356 splitSumRepr (SumRepr { sum_components = reprs }) = reprs
357 splitSumRepr repr = [repr]
358
359 boxRepr :: Repr -> VM Repr
360 boxRepr (VoidRepr {}) = boxedProductRepr []
361 boxRepr (IdRepr ty) = boxedProductRepr [ty]
362 boxRepr repr = return repr
363
364 reprType :: Repr -> Type
365 reprType (ProdRepr { prod_tycon = tycon, prod_components = tys })
366 = mkTyConApp tycon tys
367 reprType (SumRepr { sum_tycon = tycon, sum_components = reprs })
368 = mkTyConApp tycon (map reprType reprs)
369 reprType (IdRepr ty) = ty
370 reprType (VoidRepr { void_tycon = tycon }) = mkTyConApp tycon []
371 reprType (EnumRepr { enum_tycon = tycon }) = mkTyConApp tycon []
372
373 arrReprType :: Repr -> VM Type
374 arrReprType = mkPArrayType . reprType
375
376 arrShapeTys :: Repr -> VM [Type]
377 arrShapeTys (SumRepr {}) = sumShapeTys
378 arrShapeTys (ProdRepr {}) = return [intPrimTy]
379 arrShapeTys (IdRepr _) = return []
380 arrShapeTys (VoidRepr {}) = return [intPrimTy]
381 arrShapeTys (EnumRepr {}) = sumShapeTys
382
383 sumShapeTys :: VM [Type]
384 sumShapeTys = do
385 int_arr <- builtin intPrimArrayTy
386 return [intPrimTy, int_arr, int_arr]
387
388
389 arrShapeVars :: Repr -> VM [Var]
390 arrShapeVars repr = mapM (newLocalVar (fsLit "sh")) =<< arrShapeTys repr
391
392 replicateShape :: Repr -> CoreExpr -> CoreExpr -> VM [CoreExpr]
393 replicateShape (ProdRepr {}) len _ = return [len]
394 replicateShape (SumRepr {}) len tag = replicateSumShape len tag
395 replicateShape (IdRepr _) _ _ = return []
396 replicateShape (VoidRepr {}) len _ = return [len]
397 replicateShape (EnumRepr {}) len tag = replicateSumShape len tag
398
399 replicateSumShape :: CoreExpr -> CoreExpr -> VM [CoreExpr]
400 replicateSumShape len tag
401 = do
402 rep <- builtin replicatePAIntPrimVar
403 up <- builtin upToPAIntPrimVar
404 return [len, Var rep `mkApps` [len, tag], Var up `App` len]
405
406 arrSelector :: Repr -> [CoreExpr] -> VM (CoreExpr, CoreExpr, CoreExpr)
407 arrSelector (SumRepr {}) [len, sel, is] = return (len, sel, is)
408 arrSelector (EnumRepr {}) [len, sel, is] = return (len, sel, is)
409
410 emptyArrRepr :: Repr -> VM [CoreExpr]
411 emptyArrRepr (SumRepr { sum_components = prods })
412 = liftM concat $ mapM emptyArrRepr prods
413 emptyArrRepr (ProdRepr { prod_components = [] })
414 = return [Var unitDataConId]
415 emptyArrRepr (ProdRepr { prod_components = tys })
416 = mapM emptyPA tys
417 emptyArrRepr (IdRepr ty)
418 = liftM singleton $ emptyPA ty
419 emptyArrRepr (VoidRepr { void_tycon = tycon })
420 = liftM singleton $ emptyPA (mkTyConApp tycon [])
421 emptyArrRepr (EnumRepr { enum_tycon = tycon })
422 = return []
423
424 arrReprTys :: Repr -> VM [Type]
425 arrReprTys (SumRepr { sum_components = reprs })
426 = liftM concat $ mapM arrReprTys reprs
427 arrReprTys (ProdRepr { prod_components = [] })
428 = return [unitTy]
429 arrReprTys (ProdRepr { prod_components = tys })
430 = mapM mkPArrayType tys
431 arrReprTys (IdRepr ty)
432 = liftM singleton $ mkPArrayType ty
433 arrReprTys (VoidRepr { void_tycon = tycon })
434 = liftM singleton $ mkPArrayType (mkTyConApp tycon [])
435 arrReprTys (EnumRepr {})
436 = return []
437
438 arrReprTys' :: Repr -> VM [[Type]]
439 arrReprTys' (SumRepr { sum_components = reprs })
440 = mapM arrReprTys reprs
441 arrReprTys' repr = liftM singleton $ arrReprTys repr
442
443 arrReprVars :: Repr -> VM [[Var]]
444 arrReprVars repr
445 = mapM (mapM (newLocalVar (fsLit "rs"))) =<< arrReprTys' repr
446
447 mkRepr :: TyCon -> VM Repr
448 mkRepr vect_tc
449 | [tys] <- rep_tys = boxedProductRepr tys
450 -- | all null rep_tys = enumRepr
451 | otherwise = sumRepr =<< mapM unboxedProductRepr rep_tys
452 where
453 rep_tys = map dataConRepArgTys $ tyConDataCons vect_tc
454
455 buildPReprType :: TyCon -> VM Type
456 buildPReprType = liftM reprType . mkRepr
457
458 buildToPRepr :: Repr -> TyCon -> TyCon -> TyCon -> VM CoreExpr
459 buildToPRepr repr vect_tc prepr_tc _
460 = do
461 arg <- newLocalVar (fsLit "x") arg_ty
462 result <- to_repr repr (Var arg)
463
464 return . Lam arg
465 . wrapFamInstBody prepr_tc var_tys
466 $ result
467 where
468 var_tys = mkTyVarTys $ tyConTyVars vect_tc
469 arg_ty = mkTyConApp vect_tc var_tys
470 res_ty = reprType repr
471
472 cons = tyConDataCons vect_tc
473 [con] = cons
474
475 to_repr (SumRepr { sum_components = prods
476 , sum_tycon = tycon })
477 expr
478 = do
479 (vars, bodies) <- mapAndUnzipM to_unboxed prods
480 return . Case expr (mkWildId (exprType expr)) res_ty
481 $ zipWith4 mk_alt cons vars (tyConDataCons tycon) bodies
482 where
483 mk_alt con vars sum_con body
484 = (DataAlt con, vars, mkConApp sum_con (ty_args ++ [body]))
485
486 ty_args = map (Type . reprType) prods
487
488 to_repr (EnumRepr { enum_data_con = data_con }) expr
489 = return . Case expr (mkWildId (exprType expr)) res_ty
490 $ map mk_alt cons
491 where
492 mk_alt con = (DataAlt con, [], mkConApp data_con [mkDataConTag con])
493
494 to_repr prod expr
495 = do
496 (vars, body) <- to_unboxed prod
497 return $ Case expr (mkWildId (exprType expr)) res_ty
498 [(DataAlt con, vars, body)]
499
500 to_unboxed (ProdRepr { prod_components = tys
501 , prod_data_con = data_con })
502 = do
503 vars <- mapM (newLocalVar (fsLit "r")) tys
504 return (vars, mkConApp data_con (map Type tys ++ map Var vars))
505
506 to_unboxed (IdRepr ty)
507 = do
508 var <- newLocalVar (fsLit "y") ty
509 return ([var], Var var)
510
511 to_unboxed (VoidRepr { void_bottom = bottom })
512 = return ([], bottom)
513
514
515 buildFromPRepr :: Repr -> TyCon -> TyCon -> TyCon -> VM CoreExpr
516 buildFromPRepr repr vect_tc prepr_tc _
517 = do
518 arg_ty <- mkPReprType res_ty
519 arg <- newLocalVar (fsLit "x") arg_ty
520
521 liftM (Lam arg)
522 . from_repr repr
523 $ unwrapFamInstScrut prepr_tc var_tys (Var arg)
524 where
525 var_tys = mkTyVarTys $ tyConTyVars vect_tc
526 res_ty = mkTyConApp vect_tc var_tys
527
528 cons = map (`mkConApp` map Type var_tys) (tyConDataCons vect_tc)
529 [con] = cons
530
531 from_repr repr@(SumRepr { sum_components = prods
532 , sum_tycon = tycon })
533 expr
534 = do
535 vars <- mapM (newLocalVar (fsLit "x")) (map reprType prods)
536 bodies <- sequence . zipWith3 from_unboxed prods cons
537 $ map Var vars
538 return . Case expr (mkWildId (reprType repr)) res_ty
539 $ zipWith3 sum_alt (tyConDataCons tycon) vars bodies
540 where
541 sum_alt data_con var body = (DataAlt data_con, [var], body)
542
543 from_repr repr@(EnumRepr { enum_data_con = data_con }) expr
544 = do
545 var <- newLocalVar (fsLit "n") intPrimTy
546
547 let res = Case (Var var) (mkWildId intPrimTy) res_ty
548 $ (DEFAULT, [], error_expr)
549 : zipWith mk_alt (tyConDataCons vect_tc) cons
550
551 return $ Case expr (mkWildId (reprType repr)) res_ty
552 [(DataAlt data_con, [var], res)]
553 where
554 mk_alt data_con con = (LitAlt (mkDataConTagLit data_con), [], con)
555
556 error_expr = mkRuntimeErrorApp rUNTIME_ERROR_ID res_ty
557 . showSDoc
558 $ sep [text "Invalid NDP representation of", ppr vect_tc]
559
560 from_repr repr expr = from_unboxed repr con expr
561
562 from_unboxed prod@(ProdRepr { prod_components = tys
563 , prod_data_con = data_con })
564 con
565 expr
566 = do
567 vars <- mapM (newLocalVar (fsLit "y")) tys
568 return $ Case expr (mkWildId (reprType prod)) res_ty
569 [(DataAlt data_con, vars, con `mkVarApps` vars)]
570
571 from_unboxed (IdRepr _) con expr
572 = return $ con `App` expr
573
574 from_unboxed (VoidRepr {}) con expr
575 = return con
576
577 buildToArrPRepr :: Repr -> TyCon -> TyCon -> TyCon -> VM CoreExpr
578 buildToArrPRepr repr vect_tc prepr_tc arr_tc
579 = do
580 arg_ty <- mkPArrayType el_ty
581 arg <- newLocalVar (fsLit "xs") arg_ty
582
583 res_ty <- mkPArrayType (reprType repr)
584
585 shape_vars <- arrShapeVars repr
586 repr_vars <- arrReprVars repr
587
588 parray_co <- mkBuiltinCo parrayTyCon
589
590 let Just repr_co = tyConFamilyCoercion_maybe prepr_tc
591 co = mkAppCoercion parray_co
592 . mkSymCoercion
593 $ mkTyConApp repr_co var_tys
594
595 scrut = unwrapFamInstScrut arr_tc var_tys (Var arg)
596
597 result <- to_repr shape_vars repr_vars repr
598
599 return . Lam arg
600 . mkCoerce co
601 $ Case scrut (mkWildId (mkTyConApp arr_tc var_tys)) res_ty
602 [(DataAlt arr_dc, shape_vars ++ concat repr_vars, result)]
603 where
604 var_tys = mkTyVarTys $ tyConTyVars vect_tc
605 el_ty = mkTyConApp vect_tc var_tys
606
607 [arr_dc] = tyConDataCons arr_tc
608
609 to_repr shape_vars@(len_var : _)
610 repr_vars
611 (SumRepr { sum_components = prods
612 , sum_arr_tycon = tycon
613 , sum_arr_data_con = data_con })
614 = do
615 exprs <- zipWithM to_prod repr_vars prods
616
617 return . wrapFamInstBody tycon tys
618 . mkConApp data_con
619 $ map Type tys ++ map Var shape_vars ++ exprs
620 where
621 tys = map reprType prods
622
623 to_repr [len_var]
624 [repr_vars]
625 (ProdRepr { prod_components = tys
626 , prod_arr_tycon = tycon
627 , prod_arr_data_con = data_con })
628 = return . wrapFamInstBody tycon tys
629 . mkConApp data_con
630 $ map Type tys ++ map Var (len_var : repr_vars)
631
632 to_repr shape_vars
633 _
634 (EnumRepr { enum_arr_tycon = tycon
635 , enum_arr_data_con = data_con })
636 = return . wrapFamInstBody tycon []
637 . mkConApp data_con
638 $ map Var shape_vars
639
640 to_prod repr_vars@(r : _)
641 (ProdRepr { prod_components = tys@(ty : _)
642 , prod_arr_tycon = tycon
643 , prod_arr_data_con = data_con })
644 = do
645 len <- lengthPA ty (Var r)
646 return . wrapFamInstBody tycon tys
647 . mkConApp data_con
648 $ map Type tys ++ len : map Var repr_vars
649
650 to_prod [var] (IdRepr ty) = return (Var var)
651 to_prod [var] (VoidRepr {}) = return (Var var)
652
653
654 buildFromArrPRepr :: Repr -> TyCon -> TyCon -> TyCon -> VM CoreExpr
655 buildFromArrPRepr repr vect_tc prepr_tc arr_tc
656 = do
657 arg_ty <- mkPArrayType =<< mkPReprType el_ty
658 arg <- newLocalVar (fsLit "xs") arg_ty
659
660 res_ty <- mkPArrayType el_ty
661
662 shape_vars <- arrShapeVars repr
663 repr_vars <- arrReprVars repr
664
665 parray_co <- mkBuiltinCo parrayTyCon
666
667 let Just repr_co = tyConFamilyCoercion_maybe prepr_tc
668 co = mkAppCoercion parray_co
669 $ mkTyConApp repr_co var_tys
670
671 scrut = mkCoerce co (Var arg)
672
673 result = wrapFamInstBody arr_tc var_tys
674 . mkConApp arr_dc
675 $ map Type var_tys ++ map Var (shape_vars ++ concat repr_vars)
676
677 liftM (Lam arg)
678 (from_repr repr scrut shape_vars repr_vars res_ty result)
679 where
680 var_tys = mkTyVarTys $ tyConTyVars vect_tc
681 el_ty = mkTyConApp vect_tc var_tys
682
683 [arr_dc] = tyConDataCons arr_tc
684
685 from_repr (SumRepr { sum_components = prods
686 , sum_arr_tycon = tycon
687 , sum_arr_data_con = data_con })
688 expr
689 shape_vars
690 repr_vars
691 res_ty
692 body
693 = do
694 vars <- mapM (newLocalVar (fsLit "xs")) =<< mapM arrReprType prods
695 result <- go prods repr_vars vars body
696
697 let scrut = unwrapFamInstScrut tycon ty_args expr
698 return . Case scrut (mkWildId scrut_ty) res_ty
699 $ [(DataAlt data_con, shape_vars ++ vars, result)]
700 where
701 ty_args = map reprType prods
702 scrut_ty = mkTyConApp tycon ty_args
703
704 go [] [] [] body = return body
705 go (prod : prods) (repr_vars : rss) (var : vars) body
706 = do
707 shape_vars <- mapM (newLocalVar (fsLit "s")) =<< arrShapeTys prod
708
709 from_prod prod (Var var) shape_vars repr_vars res_ty
710 =<< go prods rss vars body
711
712 from_repr repr expr shape_vars [repr_vars] res_ty body
713 = from_prod repr expr shape_vars repr_vars res_ty body
714
715 from_prod prod@(ProdRepr { prod_components = tys
716 , prod_arr_tycon = tycon
717 , prod_arr_data_con = data_con })
718 expr
719 shape_vars
720 repr_vars
721 res_ty
722 body
723 = do
724 let scrut = unwrapFamInstScrut tycon tys expr
725 scrut_ty = mkTyConApp tycon tys
726 ty <- arrReprType prod
727
728 return $ Case scrut (mkWildId scrut_ty) res_ty
729 [(DataAlt data_con, shape_vars ++ repr_vars, body)]
730
731 from_prod (EnumRepr { enum_arr_tycon = tycon
732 , enum_arr_data_con = data_con })
733 expr
734 shape_vars
735 _
736 res_ty
737 body
738 = let scrut = unwrapFamInstScrut tycon [] expr
739 scrut_ty = mkTyConApp tycon []
740 in
741 return $ Case scrut (mkWildId scrut_ty) res_ty
742 [(DataAlt data_con, shape_vars, body)]
743
744 from_prod (IdRepr ty)
745 expr
746 shape_vars
747 [repr_var]
748 res_ty
749 body
750 = return $ Let (NonRec repr_var expr) body
751
752 from_prod (VoidRepr {})
753 expr
754 shape_vars
755 [repr_var]
756 res_ty
757 body
758 = return $ Let (NonRec repr_var expr) body
759
760 buildPRDictRepr :: Repr -> VM CoreExpr
761 buildPRDictRepr (VoidRepr { void_tycon = tycon })
762 = prDFunOfTyCon tycon
763 buildPRDictRepr (IdRepr ty) = mkPR ty
764 buildPRDictRepr (ProdRepr {
765 prod_components = tys
766 , prod_tycon = tycon
767 })
768 = do
769 prs <- mapM mkPR tys
770 dfun <- prDFunOfTyCon tycon
771 return $ dfun `mkTyApps` tys `mkApps` prs
772
773 buildPRDictRepr (SumRepr {
774 sum_components = prods
775 , sum_tycon = tycon })
776 = do
777 prs <- mapM buildPRDictRepr prods
778 dfun <- prDFunOfTyCon tycon
779 return $ dfun `mkTyApps` map reprType prods `mkApps` prs
780
781 buildPRDictRepr (EnumRepr { enum_tycon = tycon })
782 = prDFunOfTyCon tycon
783
784 buildPRDict :: Repr -> TyCon -> TyCon -> TyCon -> VM CoreExpr
785 buildPRDict repr vect_tc prepr_tc _
786 = do
787 dict <- buildPRDictRepr repr
788
789 pr_co <- mkBuiltinCo prTyCon
790 let co = mkAppCoercion pr_co
791 . mkSymCoercion
792 $ mkTyConApp arg_co var_tys
793
794 return $ mkCoerce co dict
795 where
796 var_tys = mkTyVarTys $ tyConTyVars vect_tc
797
798 Just arg_co = tyConFamilyCoercion_maybe prepr_tc
799
800 buildPArrayTyCon :: TyCon -> TyCon -> VM TyCon
801 buildPArrayTyCon orig_tc vect_tc = fixV $ \repr_tc ->
802 do
803 name' <- cloneName mkPArrayTyConOcc orig_name
804 rhs <- buildPArrayTyConRhs orig_name vect_tc repr_tc
805 parray <- builtin parrayTyCon
806
807 liftDs $ buildAlgTyCon name'
808 tyvars
809 [] -- no stupid theta
810 rhs
811 rec_flag -- FIXME: is this ok?
812 False -- FIXME: no generics
813 False -- not GADT syntax
814 (Just $ mk_fam_inst parray vect_tc)
815 where
816 orig_name = tyConName orig_tc
817 tyvars = tyConTyVars vect_tc
818 rec_flag = boolToRecFlag (isRecursiveTyCon vect_tc)
819
820
821 buildPArrayTyConRhs :: Name -> TyCon -> TyCon -> VM AlgTyConRhs
822 buildPArrayTyConRhs orig_name vect_tc repr_tc
823 = do
824 data_con <- buildPArrayDataCon orig_name vect_tc repr_tc
825 return $ DataTyCon { data_cons = [data_con], is_enum = False }
826
827 buildPArrayDataCon :: Name -> TyCon -> TyCon -> VM DataCon
828 buildPArrayDataCon orig_name vect_tc repr_tc
829 = do
830 dc_name <- cloneName mkPArrayDataConOcc orig_name
831 repr <- mkRepr vect_tc
832
833 shape_tys <- arrShapeTys repr
834 repr_tys <- arrReprTys repr
835
836 let tys = shape_tys ++ repr_tys
837
838 liftDs $ buildDataCon dc_name
839 False -- not infix
840 (map (const NotMarkedStrict) tys)
841 [] -- no field labels
842 (tyConTyVars vect_tc)
843 [] -- no existentials
844 [] -- no eq spec
845 [] -- no context
846 tys
847 repr_tc
848
849 mkPADFun :: TyCon -> VM Var
850 mkPADFun vect_tc
851 = newExportedVar (mkPADFunOcc $ getOccName vect_tc) =<< paDFunType vect_tc
852
853 buildTyConBindings :: TyCon -> TyCon -> TyCon -> TyCon -> Var
854 -> VM [(Var, CoreExpr)]
855 buildTyConBindings orig_tc vect_tc prepr_tc arr_tc dfun
856 = do
857 repr <- mkRepr vect_tc
858 vectDataConWorkers repr orig_tc vect_tc arr_tc
859 dict <- buildPADict repr vect_tc prepr_tc arr_tc dfun
860 binds <- takeHoisted
861 return $ (dfun, dict) : binds
862 where
863 orig_dcs = tyConDataCons orig_tc
864 vect_dcs = tyConDataCons vect_tc
865 [arr_dc] = tyConDataCons arr_tc
866
867 repr_tys = map dataConRepArgTys vect_dcs
868
869 vectDataConWorkers :: Repr -> TyCon -> TyCon -> TyCon
870 -> VM ()
871 vectDataConWorkers repr orig_tc vect_tc arr_tc
872 = do
873 bs <- sequence
874 . zipWith3 def_worker (tyConDataCons orig_tc) rep_tys
875 $ zipWith4 mk_data_con (tyConDataCons vect_tc)
876 rep_tys
877 (inits reprs)
878 (tail $ tails reprs)
879 mapM_ (uncurry hoistBinding) bs
880 where
881 tyvars = tyConTyVars vect_tc
882 var_tys = mkTyVarTys tyvars
883 ty_args = map Type var_tys
884
885 res_ty = mkTyConApp vect_tc var_tys
886
887 rep_tys = map dataConRepArgTys $ tyConDataCons vect_tc
888 reprs = splitSumRepr repr
889
890 [arr_dc] = tyConDataCons arr_tc
891
892 mk_data_con con tys pre post
893 = liftM2 (,) (vect_data_con con)
894 (lift_data_con tys pre post (mkDataConTag con))
895
896 vect_data_con con = return $ mkConApp con ty_args
897 lift_data_con tys pre_reprs post_reprs tag
898 = do
899 len <- builtin liftingContext
900 args <- mapM (newLocalVar (fsLit "xs"))
901 =<< mapM mkPArrayType tys
902
903 shape <- replicateShape repr (Var len) tag
904 repr <- mk_arr_repr (Var len) (map Var args)
905
906 pre <- liftM concat $ mapM emptyArrRepr pre_reprs
907 post <- liftM concat $ mapM emptyArrRepr post_reprs
908
909 return . mkLams (len : args)
910 . wrapFamInstBody arr_tc var_tys
911 . mkConApp arr_dc
912 $ ty_args ++ shape ++ pre ++ repr ++ post
913
914 mk_arr_repr len []
915 = do
916 units <- replicatePA len (Var unitDataConId)
917 return [units]
918
919 mk_arr_repr len arrs = return arrs
920
921 def_worker data_con arg_tys mk_body
922 = do
923 body <- closedV
924 . inBind orig_worker
925 . polyAbstract tyvars $ \abstract ->
926 liftM (abstract . vectorised)
927 $ buildClosures tyvars [] arg_tys res_ty mk_body
928
929 vect_worker <- cloneId mkVectOcc orig_worker (exprType body)
930 defGlobalVar orig_worker vect_worker
931 return (vect_worker, body)
932 where
933 orig_worker = dataConWorkId data_con
934
935 buildPADict :: Repr -> TyCon -> TyCon -> TyCon -> Var -> VM CoreExpr
936 buildPADict repr vect_tc prepr_tc arr_tc dfun
937 = polyAbstract tvs $ \abstract ->
938 do
939 meth_binds <- mapM (mk_method repr) paMethods
940 let meth_exprs = map (Var . fst) meth_binds
941
942 pa_dc <- builtin paDataCon
943 let dict = mkConApp pa_dc (Type (mkTyConApp vect_tc arg_tys) : meth_exprs)
944 body = Let (Rec meth_binds) dict
945 return . mkInlineMe $ abstract body
946 where
947 tvs = tyConTyVars arr_tc
948 arg_tys = mkTyVarTys tvs
949
950 mk_method repr (name, build)
951 = localV
952 $ do
953 body <- build repr vect_tc prepr_tc arr_tc
954 var <- newLocalVar name (exprType body)
955 return (var, mkInlineMe body)
956
957 paMethods = [(fsLit "toPRepr", buildToPRepr),
958 (fsLit "fromPRepr", buildFromPRepr),
959 (fsLit "toArrPRepr", buildToArrPRepr),
960 (fsLit "fromArrPRepr", buildFromArrPRepr),
961 (fsLit "dictPRepr", buildPRDict)]
962
963 -- | Split the given tycons into two sets depending on whether they have to be
964 -- converted (first list) or not (second list). The first argument contains
965 -- information about the conversion status of external tycons:
966 --
967 -- * tycons which have converted versions are mapped to True
968 -- * tycons which are not changed by vectorisation are mapped to False
969 -- * tycons which can't be converted are not elements of the map
970 --
971 classifyTyCons :: UniqFM Bool -> [TyConGroup] -> ([TyCon], [TyCon])
972 classifyTyCons = classify [] []
973 where
974 classify conv keep cs [] = (conv, keep)
975 classify conv keep cs ((tcs, ds) : rs)
976 | can_convert && must_convert
977 = classify (tcs ++ conv) keep (cs `addListToUFM` [(tc,True) | tc <- tcs]) rs
978 | can_convert
979 = classify conv (tcs ++ keep) (cs `addListToUFM` [(tc,False) | tc <- tcs]) rs
980 | otherwise
981 = classify conv keep cs rs
982 where
983 refs = ds `delListFromUniqSet` tcs
984
985 can_convert = isNullUFM (refs `minusUFM` cs) && all convertable tcs
986 must_convert = foldUFM (||) False (intersectUFM_C const cs refs)
987
988 convertable tc = isDataTyCon tc && all isVanillaDataCon (tyConDataCons tc)
989
990 -- | Compute mutually recursive groups of tycons in topological order
991 --
992 tyConGroups :: [TyCon] -> [TyConGroup]
993 tyConGroups tcs = map mk_grp (stronglyConnComp edges)
994 where
995 edges = [((tc, ds), tc, uniqSetToList ds) | tc <- tcs
996 , let ds = tyConsOfTyCon tc]
997
998 mk_grp (AcyclicSCC (tc, ds)) = ([tc], ds)
999 mk_grp (CyclicSCC els) = (tcs, unionManyUniqSets dss)
1000 where
1001 (tcs, dss) = unzip els
1002
1003 tyConsOfTyCon :: TyCon -> UniqSet TyCon
1004 tyConsOfTyCon
1005 = tyConsOfTypes . concatMap dataConRepArgTys . tyConDataCons
1006
1007 tyConsOfType :: Type -> UniqSet TyCon
1008 tyConsOfType ty
1009 | Just ty' <- coreView ty = tyConsOfType ty'
1010 tyConsOfType (TyVarTy v) = emptyUniqSet
1011 tyConsOfType (TyConApp tc tys) = extend (tyConsOfTypes tys)
1012 where
1013 extend | isUnLiftedTyCon tc
1014 || isTupleTyCon tc = id
1015
1016 | otherwise = (`addOneToUniqSet` tc)
1017
1018 tyConsOfType (AppTy a b) = tyConsOfType a `unionUniqSets` tyConsOfType b
1019 tyConsOfType (FunTy a b) = (tyConsOfType a `unionUniqSets` tyConsOfType b)
1020 `addOneToUniqSet` funTyCon
1021 tyConsOfType (ForAllTy _ ty) = tyConsOfType ty
1022 tyConsOfType other = pprPanic "ClosureConv.tyConsOfType" $ ppr other
1023
1024 tyConsOfTypes :: [Type] -> UniqSet TyCon
1025 tyConsOfTypes = unionManyUniqSets . map tyConsOfType
1026
1027
1028 -- ----------------------------------------------------------------------------
1029 -- Conversions
1030
1031 fromVect :: Type -> CoreExpr -> VM CoreExpr
1032 fromVect ty expr | Just ty' <- coreView ty = fromVect ty' expr
1033 fromVect (FunTy arg_ty res_ty) expr
1034 = do
1035 arg <- newLocalVar (fsLit "x") arg_ty
1036 varg <- toVect arg_ty (Var arg)
1037 varg_ty <- vectType arg_ty
1038 vres_ty <- vectType res_ty
1039 apply <- builtin applyClosureVar
1040 body <- fromVect res_ty
1041 $ Var apply `mkTyApps` [varg_ty, vres_ty] `mkApps` [expr, varg]
1042 return $ Lam arg body
1043 fromVect ty expr
1044 = identityConv ty >> return expr
1045
1046 toVect :: Type -> CoreExpr -> VM CoreExpr
1047 toVect ty expr = identityConv ty >> return expr
1048
1049 identityConv :: Type -> VM ()
1050 identityConv ty | Just ty' <- coreView ty = identityConv ty'
1051 identityConv (TyConApp tycon tys)
1052 = do
1053 mapM_ identityConv tys
1054 identityConvTyCon tycon
1055 identityConv ty = noV
1056
1057 identityConvTyCon :: TyCon -> VM ()
1058 identityConvTyCon tc
1059 | isBoxedTupleTyCon tc = return ()
1060 | isUnLiftedTyCon tc = return ()
1061 | otherwise = do
1062 tc' <- maybeV (lookupTyCon tc)
1063 if tc == tc' then return () else noV
1064