5 noV, tryV, maybeV, traceMaybeV, orElseV, fixV, localV, closedV, initV,
8 newExportedVar, newLocalVar, newDummyVar, newTyVar,
15 readGEnv, setGEnv, updGEnv,
18 readLEnv, setLEnv, updLEnv,
22 lookupVar, defGlobalVar,
23 lookupTyCon, defTyCon,
24 lookupDataCon, defDataCon,
25 lookupTyConPA, defTyConPA, defTyConPAs, defTyConBuiltinPAs,
26 lookupTyVarPA, defLocalTyVar, defLocalTyVarWithPA, localTyVars,
28 {-lookupInst,-} lookupFamInst
31 #include "HsVersions.h"
45 import TysPrim ( intPrimTy )
58 import SrcLoc ( noSrcSpan )
60 import Control.Monad ( liftM, zipWithM )
62 data Scope a b = Global a | Local b
64 -- ----------------------------------------------------------------------------
65 -- Vectorisation monad
67 data Builtins = Builtins {
70 , paDataCon :: DataCon
74 , embedDataCon :: DataCon
76 , crossDataCon :: DataCon
78 , leftDataCon :: DataCon
79 , rightDataCon :: DataCon
80 , closureTyCon :: TyCon
82 , applyClosureVar :: Var
83 , mkClosurePVar :: Var
84 , applyClosurePVar :: Var
86 , replicatePAVar :: Var
89 -- , combinePAVar :: Var
91 , liftingContext :: Var
94 initBuiltins :: DsM Builtins
97 parrayTyCon <- dsLookupTyCon parrayTyConName
98 paTyCon <- dsLookupTyCon paTyConName
99 let [paDataCon] = tyConDataCons paTyCon
100 preprTyCon <- dsLookupTyCon preprTyConName
101 prClass <- dsLookupClass prClassName
102 embedTyCon <- dsLookupTyCon embedTyConName
103 let [embedDataCon] = tyConDataCons embedTyCon
104 crossTyCon <- dsLookupTyCon ndpCrossTyConName
105 let [crossDataCon] = tyConDataCons crossTyCon
106 plusTyCon <- dsLookupTyCon ndpPlusTyConName
107 let [leftDataCon, rightDataCon] = tyConDataCons plusTyCon
108 closureTyCon <- dsLookupTyCon closureTyConName
110 mkClosureVar <- dsLookupGlobalId mkClosureName
111 applyClosureVar <- dsLookupGlobalId applyClosureName
112 mkClosurePVar <- dsLookupGlobalId mkClosurePName
113 applyClosurePVar <- dsLookupGlobalId applyClosurePName
114 lengthPAVar <- dsLookupGlobalId lengthPAName
115 replicatePAVar <- dsLookupGlobalId replicatePAName
116 emptyPAVar <- dsLookupGlobalId emptyPAName
117 -- packPAVar <- dsLookupGlobalId packPAName
118 -- combinePAVar <- dsLookupGlobalId combinePAName
119 intEqPAVar <- dsLookupGlobalId intEqPAName
121 liftingContext <- liftM (\u -> mkSysLocal FSLIT("lc") u intPrimTy)
125 parrayTyCon = parrayTyCon
127 , paDataCon = paDataCon
128 , preprTyCon = preprTyCon
130 , embedTyCon = embedTyCon
131 , embedDataCon = embedDataCon
132 , crossTyCon = crossTyCon
133 , crossDataCon = crossDataCon
134 , plusTyCon = plusTyCon
135 , leftDataCon = leftDataCon
136 , rightDataCon = rightDataCon
137 , closureTyCon = closureTyCon
138 , mkClosureVar = mkClosureVar
139 , applyClosureVar = applyClosureVar
140 , mkClosurePVar = mkClosurePVar
141 , applyClosurePVar = applyClosurePVar
142 , lengthPAVar = lengthPAVar
143 , replicatePAVar = replicatePAVar
144 , emptyPAVar = emptyPAVar
145 -- , packPAVar = packPAVar
146 -- , combinePAVar = combinePAVar
147 , intEqPAVar = intEqPAVar
148 , liftingContext = liftingContext
151 data GlobalEnv = GlobalEnv {
152 -- Mapping from global variables to their vectorised versions.
154 global_vars :: VarEnv Var
156 -- Exported variables which have a vectorised version
158 , global_exported_vars :: VarEnv (Var, Var)
160 -- Mapping from TyCons to their vectorised versions.
161 -- TyCons which do not have to be vectorised are mapped to
164 , global_tycons :: NameEnv TyCon
166 -- Mapping from DataCons to their vectorised versions
168 , global_datacons :: NameEnv DataCon
170 -- Mapping from TyCons to their PA dfuns
172 , global_pa_funs :: NameEnv Var
174 -- External package inst-env & home-package inst-env for class
177 , global_inst_env :: (InstEnv, InstEnv)
179 -- External package inst-env & home-package inst-env for family
182 , global_fam_inst_env :: FamInstEnvs
185 , global_bindings :: [(Var, CoreExpr)]
188 data LocalEnv = LocalEnv {
189 -- Mapping from local variables to their vectorised and
192 local_vars :: VarEnv (Var, Var)
194 -- In-scope type variables
196 , local_tyvars :: [TyVar]
198 -- Mapping from tyvars to their PA dictionaries
199 , local_tyvar_pa :: VarEnv CoreExpr
201 -- Local binding name
202 , local_bind_name :: FastString
206 initGlobalEnv :: VectInfo -> (InstEnv, InstEnv) -> FamInstEnvs -> Builtins
208 initGlobalEnv info instEnvs famInstEnvs bi
210 global_vars = mapVarEnv snd $ vectInfoVar info
211 , global_exported_vars = emptyVarEnv
212 , global_tycons = extendNameEnv (mapNameEnv snd (vectInfoTyCon info))
213 (tyConName funTyCon) (closureTyCon bi)
215 , global_datacons = mapNameEnv snd $ vectInfoDataCon info
216 , global_pa_funs = mapNameEnv snd $ vectInfoPADFun info
217 , global_inst_env = instEnvs
218 , global_fam_inst_env = famInstEnvs
219 , global_bindings = []
222 setFamInstEnv :: FamInstEnv -> GlobalEnv -> GlobalEnv
223 setFamInstEnv l_fam_inst genv
224 = genv { global_fam_inst_env = (g_fam_inst, l_fam_inst) }
226 (g_fam_inst, _) = global_fam_inst_env genv
228 emptyLocalEnv = LocalEnv {
229 local_vars = emptyVarEnv
231 , local_tyvar_pa = emptyVarEnv
232 , local_bind_name = FSLIT("fn")
236 updVectInfo :: GlobalEnv -> TypeEnv -> VectInfo -> VectInfo
237 updVectInfo env tyenv info
239 vectInfoVar = global_exported_vars env
240 , vectInfoTyCon = mk_env typeEnvTyCons global_tycons
241 , vectInfoDataCon = mk_env typeEnvDataCons global_datacons
242 , vectInfoPADFun = mk_env typeEnvTyCons global_pa_funs
245 mk_env from_tyenv from_env = mkNameEnv [(name, (from,to))
246 | from <- from_tyenv tyenv
247 , let name = getName from
248 , Just to <- [lookupNameEnv (from_env env) name]]
250 data VResult a = Yes GlobalEnv LocalEnv a | No
252 newtype VM a = VM { runVM :: Builtins -> GlobalEnv -> LocalEnv -> DsM (VResult a) }
254 instance Monad VM where
255 return x = VM $ \bi genv lenv -> return (Yes genv lenv x)
256 VM p >>= f = VM $ \bi genv lenv -> do
259 Yes genv' lenv' x -> runVM (f x) bi genv' lenv'
263 noV = VM $ \_ _ _ -> return No
265 traceNoV :: String -> SDoc -> VM a
266 traceNoV s d = pprTrace s d noV
268 tryV :: VM a -> VM (Maybe a)
269 tryV (VM p) = VM $ \bi genv lenv ->
273 Yes genv' lenv' x -> return (Yes genv' lenv' (Just x))
274 No -> return (Yes genv lenv Nothing)
276 maybeV :: VM (Maybe a) -> VM a
277 maybeV p = maybe noV return =<< p
279 traceMaybeV :: String -> SDoc -> VM (Maybe a) -> VM a
280 traceMaybeV s d p = maybe (traceNoV s d) return =<< p
282 orElseV :: VM a -> VM a -> VM a
283 orElseV p q = maybe q return =<< tryV p
285 fixV :: (a -> VM a) -> VM a
286 fixV f = VM (\bi genv lenv -> fixDs $ \r -> runVM (f (unYes r)) bi genv lenv )
288 unYes (Yes _ _ x) = x
290 localV :: VM a -> VM a
297 closedV :: VM a -> VM a
300 setLEnv (emptyLocalEnv { local_bind_name = local_bind_name env })
305 liftDs :: DsM a -> VM a
306 liftDs p = VM $ \bi genv lenv -> do { x <- p; return (Yes genv lenv x) }
308 builtin :: (Builtins -> a) -> VM a
309 builtin f = VM $ \bi genv lenv -> return (Yes genv lenv (f bi))
311 readGEnv :: (GlobalEnv -> a) -> VM a
312 readGEnv f = VM $ \bi genv lenv -> return (Yes genv lenv (f genv))
314 setGEnv :: GlobalEnv -> VM ()
315 setGEnv genv = VM $ \_ _ lenv -> return (Yes genv lenv ())
317 updGEnv :: (GlobalEnv -> GlobalEnv) -> VM ()
318 updGEnv f = VM $ \_ genv lenv -> return (Yes (f genv) lenv ())
320 readLEnv :: (LocalEnv -> a) -> VM a
321 readLEnv f = VM $ \bi genv lenv -> return (Yes genv lenv (f lenv))
323 setLEnv :: LocalEnv -> VM ()
324 setLEnv lenv = VM $ \_ genv _ -> return (Yes genv lenv ())
326 updLEnv :: (LocalEnv -> LocalEnv) -> VM ()
327 updLEnv f = VM $ \_ genv lenv -> return (Yes genv (f lenv) ())
329 getInstEnv :: VM (InstEnv, InstEnv)
330 getInstEnv = readGEnv global_inst_env
332 getFamInstEnv :: VM FamInstEnvs
333 getFamInstEnv = readGEnv global_fam_inst_env
335 getBindName :: VM FastString
336 getBindName = readLEnv local_bind_name
338 inBind :: Id -> VM a -> VM a
340 = do updLEnv $ \env -> env { local_bind_name = occNameFS (getOccName id) }
343 lookupExternalVar :: Module -> FastString -> VM Var
344 lookupExternalVar mod fs
346 $ dsLookupGlobalId =<< lookupOrig mod (mkVarOccFS fs)
348 cloneName :: (OccName -> OccName) -> Name -> VM Name
349 cloneName mk_occ name = liftM make (liftDs newUnique)
351 occ_name = mk_occ (nameOccName name)
353 make u | isExternalName name = mkExternalName u (nameModule name)
356 | otherwise = mkSystemName u occ_name
358 cloneId :: (OccName -> OccName) -> Id -> Type -> VM Id
361 name <- cloneName mk_occ (getName id)
362 let id' | isExportedId id = Id.mkExportedLocalId name ty
363 | otherwise = Id.mkLocalId name ty
366 newExportedVar :: OccName -> Type -> VM Var
367 newExportedVar occ_name ty
369 mod <- liftDs getModuleDs
370 u <- liftDs newUnique
372 let name = mkExternalName u mod occ_name noSrcSpan
374 return $ Id.mkExportedLocalId name ty
376 newLocalVar :: FastString -> Type -> VM Var
379 u <- liftDs newUnique
380 return $ mkSysLocal fs u ty
382 newDummyVar :: Type -> VM Var
383 newDummyVar = newLocalVar FSLIT("ds")
385 newTyVar :: FastString -> Kind -> VM Var
388 u <- liftDs newUnique
389 return $ mkTyVar (mkSysTvName u fs) k
391 defGlobalVar :: Var -> Var -> VM ()
392 defGlobalVar v v' = updGEnv $ \env ->
393 env { global_vars = extendVarEnv (global_vars env) v v'
394 , global_exported_vars = upd (global_exported_vars env)
397 upd env | isExportedId v = extendVarEnv env v (v, v')
400 lookupVar :: Var -> VM (Scope Var (Var, Var))
403 r <- readLEnv $ \env -> lookupVarEnv (local_vars env) v
405 Just e -> return (Local e)
406 Nothing -> liftM Global
407 $ traceMaybeV "lookupVar" (ppr v)
408 (readGEnv $ \env -> lookupVarEnv (global_vars env) v)
410 lookupTyCon :: TyCon -> VM (Maybe TyCon)
412 | isUnLiftedTyCon tc || isTupleTyCon tc = return (Just tc)
414 | otherwise = readGEnv $ \env -> lookupNameEnv (global_tycons env) (tyConName tc)
416 defTyCon :: TyCon -> TyCon -> VM ()
417 defTyCon tc tc' = updGEnv $ \env ->
418 env { global_tycons = extendNameEnv (global_tycons env) (tyConName tc) tc' }
420 lookupDataCon :: DataCon -> VM (Maybe DataCon)
421 lookupDataCon dc = readGEnv $ \env -> lookupNameEnv (global_datacons env) (dataConName dc)
423 defDataCon :: DataCon -> DataCon -> VM ()
424 defDataCon dc dc' = updGEnv $ \env ->
425 env { global_datacons = extendNameEnv (global_datacons env) (dataConName dc) dc' }
427 lookupTyConPA :: TyCon -> VM (Maybe Var)
428 lookupTyConPA tc = readGEnv $ \env -> lookupNameEnv (global_pa_funs env) (tyConName tc)
430 defTyConPA :: TyCon -> Var -> VM ()
431 defTyConPA tc pa = updGEnv $ \env ->
432 env { global_pa_funs = extendNameEnv (global_pa_funs env) (tyConName tc) pa }
434 defTyConPAs :: [(TyCon, Var)] -> VM ()
435 defTyConPAs ps = updGEnv $ \env ->
436 env { global_pa_funs = extendNameEnvList (global_pa_funs env)
437 [(tyConName tc, pa) | (tc, pa) <- ps] }
439 defTyConBuiltinPAs :: [(Name, Module, FastString)] -> VM ()
440 defTyConBuiltinPAs ps
442 pas <- zipWithM lookupExternalVar mods fss
444 env { global_pa_funs = extendNameEnvList (global_pa_funs env)
447 (tcs, mods, fss) = unzip3 ps
449 lookupTyVarPA :: Var -> VM (Maybe CoreExpr)
450 lookupTyVarPA tv = readLEnv $ \env -> lookupVarEnv (local_tyvar_pa env) tv
452 defLocalTyVar :: TyVar -> VM ()
453 defLocalTyVar tv = updLEnv $ \env ->
454 env { local_tyvars = tv : local_tyvars env
455 , local_tyvar_pa = local_tyvar_pa env `delVarEnv` tv
458 defLocalTyVarWithPA :: TyVar -> CoreExpr -> VM ()
459 defLocalTyVarWithPA tv pa = updLEnv $ \env ->
460 env { local_tyvars = tv : local_tyvars env
461 , local_tyvar_pa = extendVarEnv (local_tyvar_pa env) tv pa
464 localTyVars :: VM [TyVar]
465 localTyVars = readLEnv (reverse . local_tyvars)
467 -- Look up the dfun of a class instance.
469 -- The match must be unique - ie, match exactly one instance - but the
470 -- type arguments used for matching may be more specific than those of
471 -- the class instance declaration. The found class instances must not have
472 -- any type variables in the instance context that do not appear in the
473 -- instances head (i.e., no flexi vars); for details for what this means,
474 -- see the docs at InstEnv.lookupInstEnv.
477 lookupInst :: Class -> [Type] -> VM (DFunId, [Type])
479 = do { instEnv <- getInstEnv
480 ; case lookupInstEnv instEnv cls tys of
481 ([(inst, inst_tys)], _)
482 | noFlexiVar -> return (instanceDFunId inst, inst_tys')
483 | otherwise -> pprPanic "VectMonad.lookupInst: flexi var: "
484 (ppr $ mkTyConApp (classTyCon cls) tys)
486 inst_tys' = [ty | Right ty <- inst_tys]
487 noFlexiVar = all isRight inst_tys
488 _other -> traceNoV "lookupInst" (ppr cls <+> ppr tys)
491 isRight (Left _) = False
492 isRight (Right _) = True
495 -- Look up the representation tycon of a family instance.
497 -- The match must be unique - ie, match exactly one instance - but the
498 -- type arguments used for matching may be more specific than those of
499 -- the family instance declaration.
501 -- Return the instance tycon and its type instance. For example, if we have
503 -- lookupFamInst 'T' '[Int]' yields (':R42T', 'Int')
505 -- then we have a coercion (ie, type instance of family instance coercion)
507 -- :Co:R42T Int :: T [Int] ~ :R42T Int
509 -- which implies that :R42T was declared as 'data instance T [a]'.
511 lookupFamInst :: TyCon -> [Type] -> VM (TyCon, [Type])
512 lookupFamInst tycon tys
513 = ASSERT( isOpenTyCon tycon )
514 do { instEnv <- getFamInstEnv
515 ; case lookupFamInstEnv instEnv tycon tys of
516 [(fam_inst, rep_tys)] -> return (famInstTyCon fam_inst, rep_tys)
518 pprPanic "VectMonad.lookupFamInst: not found: "
519 (ppr $ mkTyConApp tycon tys)
522 initV :: HscEnv -> ModGuts -> VectInfo -> VM a -> IO (Maybe (VectInfo, a))
523 initV hsc_env guts info p
525 eps <- hscEPS hsc_env
526 let famInstEnvs = (eps_fam_inst_env eps, mg_fam_inst_env guts)
527 let instEnvs = (eps_inst_env eps, mg_inst_env guts)
529 Just r <- initDs hsc_env (mg_module guts)
532 (go instEnvs famInstEnvs)
536 go instEnvs famInstEnvs =
538 builtins <- initBuiltins
539 r <- runVM p builtins (initGlobalEnv info
545 Yes genv _ x -> return $ Just (new_info genv, x)
548 new_info genv = updVectInfo genv (mg_types guts) info