--- ----------------------------------------------------------------------------
--- Vectorisation monad
-
-data Builtins = Builtins {
- parrayTyCon :: TyCon
- , paTyCon :: TyCon
- , closureTyCon :: TyCon
- , mkClosureVar :: Var
- , applyClosureVar :: Var
- , mkClosurePVar :: Var
- , applyClosurePVar :: Var
- , closurePAVar :: Var
- , lengthPAVar :: Var
- , replicatePAVar :: Var
- }
-
-initBuiltins :: DsM Builtins
-initBuiltins
- = do
- parrayTyCon <- dsLookupTyCon parrayTyConName
- paTyCon <- dsLookupTyCon paTyConName
- closureTyCon <- dsLookupTyCon closureTyConName
-
- mkClosureVar <- dsLookupGlobalId mkClosureName
- applyClosureVar <- dsLookupGlobalId applyClosureName
- mkClosurePVar <- dsLookupGlobalId mkClosurePName
- applyClosurePVar <- dsLookupGlobalId applyClosurePName
- closurePAVar <- dsLookupGlobalId closurePAName
- lengthPAVar <- dsLookupGlobalId lengthPAName
- replicatePAVar <- dsLookupGlobalId replicatePAName
-
- return $ Builtins {
- parrayTyCon = parrayTyCon
- , paTyCon = paTyCon
- , closureTyCon = closureTyCon
- , mkClosureVar = mkClosureVar
- , applyClosureVar = applyClosureVar
- , mkClosurePVar = mkClosurePVar
- , applyClosurePVar = applyClosurePVar
- , closurePAVar = closurePAVar
- , lengthPAVar = lengthPAVar
- , replicatePAVar = replicatePAVar
- }
-
-data VEnv = VEnv {
- -- Mapping from global variables to their vectorised versions.
- --
- vect_global_vars :: VarEnv CoreExpr
-
- -- Mapping from local variables to their vectorised and lifted
- -- versions.
- --
- , vect_local_vars :: VarEnv (CoreExpr, CoreExpr)
-
- -- Exported variables which have a vectorised version
- --
- , vect_exported_vars :: VarEnv (Var, Var)
-
- -- Mapping from TyCons to their vectorised versions.
- -- TyCons which do not have to be vectorised are mapped to
- -- themselves.
- --
- , vect_tycons :: NameEnv TyCon
-
- -- Mapping from TyCons to their PA dictionaries
- --
- , vect_tycon_pa :: NameEnv CoreExpr
-
- -- Mapping from tyvars to their PA dictionaries
- --
- , vect_tyvar_pa :: VarEnv CoreExpr
- }
-
-initVEnv :: VectInfo -> DsM VEnv
-initVEnv info
- = return $ VEnv {
- vect_global_vars = mapVarEnv (Var . snd) $ vectInfoCCVar info
- , vect_local_vars = emptyVarEnv
- , vect_exported_vars = emptyVarEnv
- , vect_tycons = mapNameEnv snd $ vectInfoCCTyCon info
- , vect_tycon_pa = emptyNameEnv
- , vect_tyvar_pa = emptyVarEnv
- }
-
--- FIXME
-updVectInfo :: VEnv -> ModGuts -> ModGuts
-updVectInfo env guts = guts { mg_vect_info = info' }
- where
- info' = info {
- vectInfoCCVar = vect_exported_vars env
- , vectInfoCCTyCon = tc_env
- }
-
- info = mg_vect_info guts
- tyenv = mg_types guts
-
- tc_env = mkNameEnv [(tc_name, (tc,tc')) | tc <- typeEnvTyCons tyenv
- , let tc_name = tyConName tc
- , Just tc' <- [lookupNameEnv (vect_tycons env) tc_name]]
-
-data VResult a = Yes VEnv a | No
-
-newtype VM a = VM { runVM :: Builtins -> VEnv -> DsM (VResult a) }
-
-instance Monad VM where
- return x = VM $ \bi env -> return (Yes env x)
- VM p >>= f = VM $ \bi env -> do
- r <- p bi env
- case r of
- Yes env' x -> runVM (f x) bi env'
- No -> return No
-
-noV :: VM a
-noV = VM $ \bi env -> return No
-
-tryV :: VM a -> VM (Maybe a)
-tryV (VM p) = VM $ \bi env -> do
- r <- p bi env
- case r of
- Yes env' x -> return (Yes env' (Just x))
- No -> return (Yes env Nothing)
-
-maybeV :: VM (Maybe a) -> VM a
-maybeV p = maybe noV return =<< p
-
-orElseV :: VM a -> VM a -> VM a
-orElseV p q = maybe q return =<< tryV p
-
-liftDs :: DsM a -> VM a
-liftDs p = VM $ \bi env -> do { x <- p; return (Yes env x) }
-
-builtin :: (Builtins -> a) -> VM a
-builtin f = VM $ \bi env -> return (Yes env (f bi))
-
-readEnv :: (VEnv -> a) -> VM a
-readEnv f = VM $ \bi env -> return (Yes env (f env))
-
-setEnv :: VEnv -> VM ()
-setEnv env = VM $ \_ _ -> return (Yes env ())
-
-updEnv :: (VEnv -> VEnv) -> VM ()
-updEnv f = VM $ \_ env -> return (Yes (f env) ())
-
-newTyVar :: FastString -> Kind -> VM Var
-newTyVar fs k
- = do
- u <- liftDs newUnique
- return $ mkTyVar (mkSysTvName u fs) k
-
-lookupTyCon :: TyCon -> VM (Maybe TyCon)
-lookupTyCon tc = readEnv $ \env -> lookupNameEnv (vect_tycons env) (tyConName tc)