2 module Vectorise.Monad (
3 module Vectorise.Monad.Base,
4 module Vectorise.Monad.Naming,
5 module Vectorise.Monad.Local,
6 module Vectorise.Monad.Global,
7 module Vectorise.Monad.InstEnv,
17 maybeCantVectoriseVarM,
26 import Vectorise.Monad.Base
27 import Vectorise.Monad.Naming
28 import Vectorise.Monad.Local
29 import Vectorise.Monad.Global
30 import Vectorise.Monad.InstEnv
31 import Vectorise.Builtins
34 import HscTypes hiding ( MonadThings(..) )
36 import MonadUtils (liftIO)
48 -- | Run a vectorisation computation.
54 -> IO (Maybe (VectInfo, a))
55 initV hsc_env guts info thing_inside
56 = do { (_, Just r) <- initDs hsc_env (mg_module guts) (mg_rdr_env guts) (mg_types guts) go
61 = do { -- pick a DPH backend
62 ; dflags <- getDOptsDs
63 ; case dphPackageMaybe dflags of
64 Nothing -> failWithDs $ ptext selectBackendErr
67 -- set up tables of builtin entities
68 ; let compilingDPH = dphBackend dflags == DPHThis -- FIXME: temporary kludge support
69 ; builtins <- initBuiltins pkg
70 ; builtin_vars <- initBuiltinVars compilingDPH builtins
71 ; builtin_tycons <- initBuiltinTyCons builtins
72 ; let builtin_datacons = initBuiltinDataCons builtins
73 ; builtin_boxed <- initBuiltinBoxedTyCons builtins
74 ; builtin_scalars <- initBuiltinScalars compilingDPH builtins
76 -- set up class and type family envrionments
77 ; eps <- liftIO $ hscEPS hsc_env
78 ; let famInstEnvs = (eps_fam_inst_env eps, mg_fam_inst_env guts)
79 instEnvs = (eps_inst_env eps, mg_inst_env guts)
80 ; builtin_prs <- initBuiltinPRs builtins instEnvs
81 ; builtin_pas <- initBuiltinPAs builtins instEnvs
83 -- construct the initial global environment
84 ; let genv = extendImportedVarsEnv builtin_vars
85 . extendScalars builtin_scalars
86 . extendTyConsEnv builtin_tycons
87 . extendDataConsEnv builtin_datacons
88 . extendPAFunsEnv builtin_pas
89 . setPRFunsEnv builtin_prs
90 . setBoxedTyConsEnv builtin_boxed
91 $ initGlobalEnv info (mg_vect_decls guts) instEnvs famInstEnvs
93 -- perform vectorisation
94 ; r <- runVM thing_inside builtins genv emptyLocalEnv
96 Yes genv _ x -> return $ Just (new_info genv, x)
100 new_info genv = modVectInfo genv (mg_types guts) info
102 selectBackendErr = sLit "To use -fvectorise select a DPH backend with -fdph-par or -fdph-seq"
104 -- Builtins -------------------------------------------------------------------
105 -- | Lift a desugaring computation using the `Builtins` into the vectorisation monad.
106 liftBuiltinDs :: (Builtins -> DsM a) -> VM a
107 liftBuiltinDs p = VM $ \bi genv lenv -> do { x <- p bi; return (Yes genv lenv x)}
110 -- | Project something from the set of builtins.
111 builtin :: (Builtins -> a) -> VM a
112 builtin f = VM $ \bi genv lenv -> return (Yes genv lenv (f bi))
115 -- | Lift a function using the `Builtins` into the vectorisation monad.
116 builtins :: (a -> Builtins -> b) -> VM (a -> b)
117 builtins f = VM $ \bi genv lenv -> return (Yes genv lenv (`f` bi))
120 -- Var ------------------------------------------------------------------------
121 -- | Lookup the vectorised and\/or lifted versions of this variable.
122 -- If it's in the global environment we get the vectorised version.
123 -- If it's in the local environment we get both the vectorised and lifted version.
124 lookupVar :: Var -> VM (Scope Var (Var, Var))
126 = do r <- readLEnv $ \env -> lookupVarEnv (local_vars env) v
128 Just e -> return (Local e)
129 Nothing -> liftM Global
130 . maybeCantVectoriseVarM v
131 . readGEnv $ \env -> lookupVarEnv (global_vars env) v
133 maybeCantVectoriseVarM :: Monad m => Var -> m (Maybe Var) -> m Var
134 maybeCantVectoriseVarM v p
142 | Just _ <- isClassOpId_maybe var
143 = cantVectorise "ClassOpId not vectorised:" (ppr var)
146 = cantVectorise "Variable not vectorised:" (ppr var)
149 -- Global scalars --------------------------------------------------------------
151 addGlobalScalar :: Var -> VM ()
153 = do { traceVt "addGlobalScalar" (ppr var)
154 ; updGEnv $ \env -> env{global_scalar_vars = extendVarSet (global_scalar_vars env) var}
158 -- Primitives -----------------------------------------------------------------
160 lookupPrimPArray :: TyCon -> VM (Maybe TyCon)
161 lookupPrimPArray = liftBuiltinDs . primPArray
163 lookupPrimMethod :: TyCon -> String -> VM (Maybe Var)
164 lookupPrimMethod tycon = liftBuiltinDs . primMethod tycon