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
73 , prDataCon :: DataCon
75 , embedDataCon :: DataCon
77 , crossDataCon :: DataCon
79 , leftDataCon :: DataCon
80 , rightDataCon :: DataCon
81 , closureTyCon :: TyCon
83 , applyClosureVar :: Var
84 , mkClosurePVar :: Var
85 , applyClosurePVar :: Var
87 , replicatePAVar :: Var
90 -- , combinePAVar :: Var
92 , liftingContext :: Var
95 initBuiltins :: DsM Builtins
98 parrayTyCon <- dsLookupTyCon parrayTyConName
99 paTyCon <- dsLookupTyCon paTyConName
100 let [paDataCon] = tyConDataCons paTyCon
101 preprTyCon <- dsLookupTyCon preprTyConName
102 prTyCon <- dsLookupTyCon prTyConName
103 let [prDataCon] = tyConDataCons prTyCon
104 embedTyCon <- dsLookupTyCon embedTyConName
105 let [embedDataCon] = tyConDataCons embedTyCon
106 crossTyCon <- dsLookupTyCon ndpCrossTyConName
107 let [crossDataCon] = tyConDataCons crossTyCon
108 plusTyCon <- dsLookupTyCon ndpPlusTyConName
109 let [leftDataCon, rightDataCon] = tyConDataCons plusTyCon
110 closureTyCon <- dsLookupTyCon closureTyConName
112 mkClosureVar <- dsLookupGlobalId mkClosureName
113 applyClosureVar <- dsLookupGlobalId applyClosureName
114 mkClosurePVar <- dsLookupGlobalId mkClosurePName
115 applyClosurePVar <- dsLookupGlobalId applyClosurePName
116 lengthPAVar <- dsLookupGlobalId lengthPAName
117 replicatePAVar <- dsLookupGlobalId replicatePAName
118 emptyPAVar <- dsLookupGlobalId emptyPAName
119 -- packPAVar <- dsLookupGlobalId packPAName
120 -- combinePAVar <- dsLookupGlobalId combinePAName
121 intEqPAVar <- dsLookupGlobalId intEqPAName
123 liftingContext <- liftM (\u -> mkSysLocal FSLIT("lc") u intPrimTy)
127 parrayTyCon = parrayTyCon
129 , paDataCon = paDataCon
130 , preprTyCon = preprTyCon
132 , prDataCon = prDataCon
133 , embedTyCon = embedTyCon
134 , embedDataCon = embedDataCon
135 , crossTyCon = crossTyCon
136 , crossDataCon = crossDataCon
137 , plusTyCon = plusTyCon
138 , leftDataCon = leftDataCon
139 , rightDataCon = rightDataCon
140 , closureTyCon = closureTyCon
141 , mkClosureVar = mkClosureVar
142 , applyClosureVar = applyClosureVar
143 , mkClosurePVar = mkClosurePVar
144 , applyClosurePVar = applyClosurePVar
145 , lengthPAVar = lengthPAVar
146 , replicatePAVar = replicatePAVar
147 , emptyPAVar = emptyPAVar
148 -- , packPAVar = packPAVar
149 -- , combinePAVar = combinePAVar
150 , intEqPAVar = intEqPAVar
151 , liftingContext = liftingContext
154 data GlobalEnv = GlobalEnv {
155 -- Mapping from global variables to their vectorised versions.
157 global_vars :: VarEnv Var
159 -- Exported variables which have a vectorised version
161 , global_exported_vars :: VarEnv (Var, Var)
163 -- Mapping from TyCons to their vectorised versions.
164 -- TyCons which do not have to be vectorised are mapped to
167 , global_tycons :: NameEnv TyCon
169 -- Mapping from DataCons to their vectorised versions
171 , global_datacons :: NameEnv DataCon
173 -- Mapping from TyCons to their PA dfuns
175 , global_pa_funs :: NameEnv Var
177 -- External package inst-env & home-package inst-env for class
180 , global_inst_env :: (InstEnv, InstEnv)
182 -- External package inst-env & home-package inst-env for family
185 , global_fam_inst_env :: FamInstEnvs
188 , global_bindings :: [(Var, CoreExpr)]
191 data LocalEnv = LocalEnv {
192 -- Mapping from local variables to their vectorised and
195 local_vars :: VarEnv (Var, Var)
197 -- In-scope type variables
199 , local_tyvars :: [TyVar]
201 -- Mapping from tyvars to their PA dictionaries
202 , local_tyvar_pa :: VarEnv CoreExpr
204 -- Local binding name
205 , local_bind_name :: FastString
209 initGlobalEnv :: VectInfo -> (InstEnv, InstEnv) -> FamInstEnvs -> Builtins
211 initGlobalEnv info instEnvs famInstEnvs bi
213 global_vars = mapVarEnv snd $ vectInfoVar info
214 , global_exported_vars = emptyVarEnv
215 , global_tycons = extendNameEnv (mapNameEnv snd (vectInfoTyCon info))
216 (tyConName funTyCon) (closureTyCon bi)
218 , global_datacons = mapNameEnv snd $ vectInfoDataCon info
219 , global_pa_funs = mapNameEnv snd $ vectInfoPADFun info
220 , global_inst_env = instEnvs
221 , global_fam_inst_env = famInstEnvs
222 , global_bindings = []
225 setFamInstEnv :: FamInstEnv -> GlobalEnv -> GlobalEnv
226 setFamInstEnv l_fam_inst genv
227 = genv { global_fam_inst_env = (g_fam_inst, l_fam_inst) }
229 (g_fam_inst, _) = global_fam_inst_env genv
231 emptyLocalEnv = LocalEnv {
232 local_vars = emptyVarEnv
234 , local_tyvar_pa = emptyVarEnv
235 , local_bind_name = FSLIT("fn")
239 updVectInfo :: GlobalEnv -> TypeEnv -> VectInfo -> VectInfo
240 updVectInfo env tyenv info
242 vectInfoVar = global_exported_vars env
243 , vectInfoTyCon = mk_env typeEnvTyCons global_tycons
244 , vectInfoDataCon = mk_env typeEnvDataCons global_datacons
245 , vectInfoPADFun = mk_env typeEnvTyCons global_pa_funs
248 mk_env from_tyenv from_env = mkNameEnv [(name, (from,to))
249 | from <- from_tyenv tyenv
250 , let name = getName from
251 , Just to <- [lookupNameEnv (from_env env) name]]
253 data VResult a = Yes GlobalEnv LocalEnv a | No
255 newtype VM a = VM { runVM :: Builtins -> GlobalEnv -> LocalEnv -> DsM (VResult a) }
257 instance Monad VM where
258 return x = VM $ \bi genv lenv -> return (Yes genv lenv x)
259 VM p >>= f = VM $ \bi genv lenv -> do
262 Yes genv' lenv' x -> runVM (f x) bi genv' lenv'
266 noV = VM $ \_ _ _ -> return No
268 traceNoV :: String -> SDoc -> VM a
269 traceNoV s d = pprTrace s d noV
271 tryV :: VM a -> VM (Maybe a)
272 tryV (VM p) = VM $ \bi genv lenv ->
276 Yes genv' lenv' x -> return (Yes genv' lenv' (Just x))
277 No -> return (Yes genv lenv Nothing)
279 maybeV :: VM (Maybe a) -> VM a
280 maybeV p = maybe noV return =<< p
282 traceMaybeV :: String -> SDoc -> VM (Maybe a) -> VM a
283 traceMaybeV s d p = maybe (traceNoV s d) return =<< p
285 orElseV :: VM a -> VM a -> VM a
286 orElseV p q = maybe q return =<< tryV p
288 fixV :: (a -> VM a) -> VM a
289 fixV f = VM (\bi genv lenv -> fixDs $ \r -> runVM (f (unYes r)) bi genv lenv )
291 unYes (Yes _ _ x) = x
293 localV :: VM a -> VM a
300 closedV :: VM a -> VM a
303 setLEnv (emptyLocalEnv { local_bind_name = local_bind_name env })
308 liftDs :: DsM a -> VM a
309 liftDs p = VM $ \bi genv lenv -> do { x <- p; return (Yes genv lenv x) }
311 builtin :: (Builtins -> a) -> VM a
312 builtin f = VM $ \bi genv lenv -> return (Yes genv lenv (f bi))
314 readGEnv :: (GlobalEnv -> a) -> VM a
315 readGEnv f = VM $ \bi genv lenv -> return (Yes genv lenv (f genv))
317 setGEnv :: GlobalEnv -> VM ()
318 setGEnv genv = VM $ \_ _ lenv -> return (Yes genv lenv ())
320 updGEnv :: (GlobalEnv -> GlobalEnv) -> VM ()
321 updGEnv f = VM $ \_ genv lenv -> return (Yes (f genv) lenv ())
323 readLEnv :: (LocalEnv -> a) -> VM a
324 readLEnv f = VM $ \bi genv lenv -> return (Yes genv lenv (f lenv))
326 setLEnv :: LocalEnv -> VM ()
327 setLEnv lenv = VM $ \_ genv _ -> return (Yes genv lenv ())
329 updLEnv :: (LocalEnv -> LocalEnv) -> VM ()
330 updLEnv f = VM $ \_ genv lenv -> return (Yes genv (f lenv) ())
332 getInstEnv :: VM (InstEnv, InstEnv)
333 getInstEnv = readGEnv global_inst_env
335 getFamInstEnv :: VM FamInstEnvs
336 getFamInstEnv = readGEnv global_fam_inst_env
338 getBindName :: VM FastString
339 getBindName = readLEnv local_bind_name
341 inBind :: Id -> VM a -> VM a
343 = do updLEnv $ \env -> env { local_bind_name = occNameFS (getOccName id) }
346 lookupExternalVar :: Module -> FastString -> VM Var
347 lookupExternalVar mod fs
349 $ dsLookupGlobalId =<< lookupOrig mod (mkVarOccFS fs)
351 cloneName :: (OccName -> OccName) -> Name -> VM Name
352 cloneName mk_occ name = liftM make (liftDs newUnique)
354 occ_name = mk_occ (nameOccName name)
356 make u | isExternalName name = mkExternalName u (nameModule name)
359 | otherwise = mkSystemName u occ_name
361 cloneId :: (OccName -> OccName) -> Id -> Type -> VM Id
364 name <- cloneName mk_occ (getName id)
365 let id' | isExportedId id = Id.mkExportedLocalId name ty
366 | otherwise = Id.mkLocalId name ty
369 newExportedVar :: OccName -> Type -> VM Var
370 newExportedVar occ_name ty
372 mod <- liftDs getModuleDs
373 u <- liftDs newUnique
375 let name = mkExternalName u mod occ_name noSrcSpan
377 return $ Id.mkExportedLocalId name ty
379 newLocalVar :: FastString -> Type -> VM Var
382 u <- liftDs newUnique
383 return $ mkSysLocal fs u ty
385 newDummyVar :: Type -> VM Var
386 newDummyVar = newLocalVar FSLIT("ds")
388 newTyVar :: FastString -> Kind -> VM Var
391 u <- liftDs newUnique
392 return $ mkTyVar (mkSysTvName u fs) k
394 defGlobalVar :: Var -> Var -> VM ()
395 defGlobalVar v v' = updGEnv $ \env ->
396 env { global_vars = extendVarEnv (global_vars env) v v'
397 , global_exported_vars = upd (global_exported_vars env)
400 upd env | isExportedId v = extendVarEnv env v (v, v')
403 lookupVar :: Var -> VM (Scope Var (Var, Var))
406 r <- readLEnv $ \env -> lookupVarEnv (local_vars env) v
408 Just e -> return (Local e)
409 Nothing -> liftM Global
410 $ traceMaybeV "lookupVar" (ppr v)
411 (readGEnv $ \env -> lookupVarEnv (global_vars env) v)
413 lookupTyCon :: TyCon -> VM (Maybe TyCon)
415 | isUnLiftedTyCon tc || isTupleTyCon tc = return (Just tc)
417 | otherwise = readGEnv $ \env -> lookupNameEnv (global_tycons env) (tyConName tc)
419 defTyCon :: TyCon -> TyCon -> VM ()
420 defTyCon tc tc' = updGEnv $ \env ->
421 env { global_tycons = extendNameEnv (global_tycons env) (tyConName tc) tc' }
423 lookupDataCon :: DataCon -> VM (Maybe DataCon)
424 lookupDataCon dc = readGEnv $ \env -> lookupNameEnv (global_datacons env) (dataConName dc)
426 defDataCon :: DataCon -> DataCon -> VM ()
427 defDataCon dc dc' = updGEnv $ \env ->
428 env { global_datacons = extendNameEnv (global_datacons env) (dataConName dc) dc' }
430 lookupTyConPA :: TyCon -> VM (Maybe Var)
431 lookupTyConPA tc = readGEnv $ \env -> lookupNameEnv (global_pa_funs env) (tyConName tc)
433 defTyConPA :: TyCon -> Var -> VM ()
434 defTyConPA tc pa = updGEnv $ \env ->
435 env { global_pa_funs = extendNameEnv (global_pa_funs env) (tyConName tc) pa }
437 defTyConPAs :: [(TyCon, Var)] -> VM ()
438 defTyConPAs ps = updGEnv $ \env ->
439 env { global_pa_funs = extendNameEnvList (global_pa_funs env)
440 [(tyConName tc, pa) | (tc, pa) <- ps] }
442 defTyConBuiltinPAs :: [(Name, Module, FastString)] -> VM ()
443 defTyConBuiltinPAs ps
445 pas <- zipWithM lookupExternalVar mods fss
447 env { global_pa_funs = extendNameEnvList (global_pa_funs env)
450 (tcs, mods, fss) = unzip3 ps
452 lookupTyVarPA :: Var -> VM (Maybe CoreExpr)
453 lookupTyVarPA tv = readLEnv $ \env -> lookupVarEnv (local_tyvar_pa env) tv
455 defLocalTyVar :: TyVar -> VM ()
456 defLocalTyVar tv = updLEnv $ \env ->
457 env { local_tyvars = tv : local_tyvars env
458 , local_tyvar_pa = local_tyvar_pa env `delVarEnv` tv
461 defLocalTyVarWithPA :: TyVar -> CoreExpr -> VM ()
462 defLocalTyVarWithPA tv pa = updLEnv $ \env ->
463 env { local_tyvars = tv : local_tyvars env
464 , local_tyvar_pa = extendVarEnv (local_tyvar_pa env) tv pa
467 localTyVars :: VM [TyVar]
468 localTyVars = readLEnv (reverse . local_tyvars)
470 -- Look up the dfun of a class instance.
472 -- The match must be unique - ie, match exactly one instance - but the
473 -- type arguments used for matching may be more specific than those of
474 -- the class instance declaration. The found class instances must not have
475 -- any type variables in the instance context that do not appear in the
476 -- instances head (i.e., no flexi vars); for details for what this means,
477 -- see the docs at InstEnv.lookupInstEnv.
480 lookupInst :: Class -> [Type] -> VM (DFunId, [Type])
482 = do { instEnv <- getInstEnv
483 ; case lookupInstEnv instEnv cls tys of
484 ([(inst, inst_tys)], _)
485 | noFlexiVar -> return (instanceDFunId inst, inst_tys')
486 | otherwise -> pprPanic "VectMonad.lookupInst: flexi var: "
487 (ppr $ mkTyConApp (classTyCon cls) tys)
489 inst_tys' = [ty | Right ty <- inst_tys]
490 noFlexiVar = all isRight inst_tys
491 _other -> traceNoV "lookupInst" (ppr cls <+> ppr tys)
494 isRight (Left _) = False
495 isRight (Right _) = True
498 -- Look up the representation tycon of a family instance.
500 -- The match must be unique - ie, match exactly one instance - but the
501 -- type arguments used for matching may be more specific than those of
502 -- the family instance declaration.
504 -- Return the instance tycon and its type instance. For example, if we have
506 -- lookupFamInst 'T' '[Int]' yields (':R42T', 'Int')
508 -- then we have a coercion (ie, type instance of family instance coercion)
510 -- :Co:R42T Int :: T [Int] ~ :R42T Int
512 -- which implies that :R42T was declared as 'data instance T [a]'.
514 lookupFamInst :: TyCon -> [Type] -> VM (TyCon, [Type])
515 lookupFamInst tycon tys
516 = ASSERT( isOpenTyCon tycon )
517 do { instEnv <- getFamInstEnv
518 ; case lookupFamInstEnv instEnv tycon tys of
519 [(fam_inst, rep_tys)] -> return (famInstTyCon fam_inst, rep_tys)
521 pprPanic "VectMonad.lookupFamInst: not found: "
522 (ppr $ mkTyConApp tycon tys)
525 initV :: HscEnv -> ModGuts -> VectInfo -> VM a -> IO (Maybe (VectInfo, a))
526 initV hsc_env guts info p
528 eps <- hscEPS hsc_env
529 let famInstEnvs = (eps_fam_inst_env eps, mg_fam_inst_env guts)
530 let instEnvs = (eps_inst_env eps, mg_inst_env guts)
532 Just r <- initDs hsc_env (mg_module guts)
535 (go instEnvs famInstEnvs)
539 go instEnvs famInstEnvs =
541 builtins <- initBuiltins
542 r <- runVM p builtins (initGlobalEnv info
548 Yes genv _ x -> return $ Just (new_info genv, x)
551 new_info genv = updVectInfo genv (mg_types guts) info