+{-# OPTIONS -w #-}
+-- The above warning supression flag is a temporary kludge.
+-- While working on this module you are encouraged to remove it and fix
+-- any warnings in the module. See
+-- http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings
+-- for details
+
module VectMonad (
+ Scope(..),
VM,
- noV, tryV, maybeV, orElseV, localV, initV,
- newLocalVar, newTyVar,
+ noV, tryV, maybeV, traceMaybeV, orElseV, fixV, localV, closedV, initV,
+ liftDs,
+ cloneName, cloneId,
+ newExportedVar, newLocalVar, newDummyVar, newTyVar,
- Builtins(..),
- builtin,
+ Builtins(..), sumTyCon, prodTyCon,
+ builtin, builtins,
GlobalEnv(..),
+ setFamInstEnv,
readGEnv, setGEnv, updGEnv,
LocalEnv(..),
readLEnv, setLEnv, updLEnv,
- lookupTyCon, extendTyVarPA
+ getBindName, inBind,
+
+ lookupVar, defGlobalVar,
+ lookupTyCon, defTyCon,
+ lookupDataCon, defDataCon,
+ lookupTyConPA, defTyConPA, defTyConPAs,
+ lookupTyConPR,
+ lookupPrimMethod, lookupPrimPArray,
+ lookupTyVarPA, defLocalTyVar, defLocalTyVarWithPA, localTyVars,
+
+ {-lookupInst,-} lookupFamInst
) where
#include "HsVersions.h"
+import VectBuiltIn
+
import HscTypes
import CoreSyn
import TyCon
+import DataCon
import Type
+import Class
import Var
import VarEnv
import Id
+import OccName
import Name
import NameEnv
+import TysPrim ( intPrimTy )
+import Module
+import IfaceEnv
+import IOEnv ( ioToIOEnv )
import DsMonad
import PrelNames
+import InstEnv
+import FamInstEnv
+
+import Panic
+import Outputable
import FastString
+import SrcLoc ( noSrcSpan )
--- ----------------------------------------------------------------------------
--- Vectorisation monad
+import Control.Monad ( liftM, zipWithM )
-data Builtins = Builtins {
- parrayTyCon :: TyCon
- , paTyCon :: TyCon
- , closureTyCon :: TyCon
- , mkClosureVar :: Var
- , applyClosureVar :: Var
- , mkClosurePVar :: Var
- , applyClosurePVar :: Var
- , closurePAVar :: Var
- , lengthPAVar :: Var
- , replicatePAVar :: Var
- }
+data Scope a b = Global a | Local b
-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
- }
+-- ----------------------------------------------------------------------------
+-- Vectorisation monad
data GlobalEnv = GlobalEnv {
-- Mapping from global variables to their vectorised versions.
--
- global_vars :: VarEnv CoreExpr
+ global_vars :: VarEnv Var
-- Exported variables which have a vectorised version
--
--
, global_tycons :: NameEnv TyCon
- -- Mapping from TyCons to their PA dictionaries
+ -- Mapping from DataCons to their vectorised versions
+ --
+ , global_datacons :: NameEnv DataCon
+
+ -- Mapping from TyCons to their PA dfuns
--
- , global_tycon_pa :: NameEnv CoreExpr
+ , global_pa_funs :: NameEnv Var
+
+ -- Mapping from TyCons to their PR dfuns
+ , global_pr_funs :: NameEnv Var
+
+ -- External package inst-env & home-package inst-env for class
+ -- instances
+ --
+ , global_inst_env :: (InstEnv, InstEnv)
+
+ -- External package inst-env & home-package inst-env for family
+ -- instances
+ --
+ , global_fam_inst_env :: FamInstEnvs
+
+ -- Hoisted bindings
+ , global_bindings :: [(Var, CoreExpr)]
}
data LocalEnv = LocalEnv {
-- Mapping from local variables to their vectorised and
-- lifted versions
--
- local_vars :: VarEnv (CoreExpr, CoreExpr)
+ local_vars :: VarEnv (Var, Var)
+
+ -- In-scope type variables
+ --
+ , local_tyvars :: [TyVar]
-- Mapping from tyvars to their PA dictionaries
, local_tyvar_pa :: VarEnv CoreExpr
+
+ -- Local binding name
+ , local_bind_name :: FastString
}
-
-initGlobalEnv :: VectInfo -> GlobalEnv
-initGlobalEnv info
+initGlobalEnv :: VectInfo -> (InstEnv, InstEnv) -> FamInstEnvs -> GlobalEnv
+initGlobalEnv info instEnvs famInstEnvs
= GlobalEnv {
- global_vars = mapVarEnv (Var . snd) $ vectInfoCCVar info
+ global_vars = mapVarEnv snd $ vectInfoVar info
, global_exported_vars = emptyVarEnv
- , global_tycons = mapNameEnv snd $ vectInfoCCTyCon info
- , global_tycon_pa = emptyNameEnv
+ , global_tycons = mapNameEnv snd $ vectInfoTyCon info
+ , global_datacons = mapNameEnv snd $ vectInfoDataCon info
+ , global_pa_funs = mapNameEnv snd $ vectInfoPADFun info
+ , global_pr_funs = emptyNameEnv
+ , global_inst_env = instEnvs
+ , global_fam_inst_env = famInstEnvs
+ , global_bindings = []
}
+setFamInstEnv :: FamInstEnv -> GlobalEnv -> GlobalEnv
+setFamInstEnv l_fam_inst genv
+ = genv { global_fam_inst_env = (g_fam_inst, l_fam_inst) }
+ where
+ (g_fam_inst, _) = global_fam_inst_env genv
+
+extendTyConsEnv :: [(Name, TyCon)] -> GlobalEnv -> GlobalEnv
+extendTyConsEnv ps genv
+ = genv { global_tycons = extendNameEnvList (global_tycons genv) ps }
+
+extendPAFunsEnv :: [(Name, Var)] -> GlobalEnv -> GlobalEnv
+extendPAFunsEnv ps genv
+ = genv { global_pa_funs = extendNameEnvList (global_pa_funs genv) ps }
+
+setPRFunsEnv :: [(Name, Var)] -> GlobalEnv -> GlobalEnv
+setPRFunsEnv ps genv
+ = genv { global_pr_funs = mkNameEnv ps }
+
emptyLocalEnv = LocalEnv {
local_vars = emptyVarEnv
+ , local_tyvars = []
, local_tyvar_pa = emptyVarEnv
+ , local_bind_name = FSLIT("fn")
}
-- FIXME
updVectInfo :: GlobalEnv -> TypeEnv -> VectInfo -> VectInfo
updVectInfo env tyenv info
= info {
- vectInfoCCVar = global_exported_vars env
- , vectInfoCCTyCon = tc_env
+ vectInfoVar = global_exported_vars env
+ , vectInfoTyCon = mk_env typeEnvTyCons global_tycons
+ , vectInfoDataCon = mk_env typeEnvDataCons global_datacons
+ , vectInfoPADFun = mk_env typeEnvTyCons global_pa_funs
}
where
- tc_env = mkNameEnv [(tc_name, (tc,tc'))
- | tc <- typeEnvTyCons tyenv
- , let tc_name = tyConName tc
- , Just tc' <- [lookupNameEnv (global_tycons env) tc_name]]
+ mk_env from_tyenv from_env = mkNameEnv [(name, (from,to))
+ | from <- from_tyenv tyenv
+ , let name = getName from
+ , Just to <- [lookupNameEnv (from_env env) name]]
data VResult a = Yes GlobalEnv LocalEnv a | No
noV :: VM a
noV = VM $ \_ _ _ -> return No
+traceNoV :: String -> SDoc -> VM a
+traceNoV s d = pprTrace s d noV
+
tryV :: VM a -> VM (Maybe a)
tryV (VM p) = VM $ \bi genv lenv ->
do
maybeV :: VM (Maybe a) -> VM a
maybeV p = maybe noV return =<< p
+traceMaybeV :: String -> SDoc -> VM (Maybe a) -> VM a
+traceMaybeV s d p = maybe (traceNoV s d) return =<< p
+
orElseV :: VM a -> VM a -> VM a
orElseV p q = maybe q return =<< tryV p
+fixV :: (a -> VM a) -> VM a
+fixV f = VM (\bi genv lenv -> fixDs $ \r -> runVM (f (unYes r)) bi genv lenv )
+ where
+ unYes (Yes _ _ x) = x
+
localV :: VM a -> VM a
localV p = do
env <- readLEnv id
setLEnv env
return x
+closedV :: VM a -> VM a
+closedV p = do
+ env <- readLEnv id
+ setLEnv (emptyLocalEnv { local_bind_name = local_bind_name env })
+ x <- p
+ setLEnv env
+ return x
+
liftDs :: DsM a -> VM a
liftDs p = VM $ \bi genv lenv -> do { x <- p; return (Yes genv lenv x) }
builtin :: (Builtins -> a) -> VM a
builtin f = VM $ \bi genv lenv -> return (Yes genv lenv (f bi))
+builtins :: (a -> Builtins -> b) -> VM (a -> b)
+builtins f = VM $ \bi genv lenv -> return (Yes genv lenv (`f` bi))
+
readGEnv :: (GlobalEnv -> a) -> VM a
readGEnv f = VM $ \bi genv lenv -> return (Yes genv lenv (f genv))
updLEnv :: (LocalEnv -> LocalEnv) -> VM ()
updLEnv f = VM $ \_ genv lenv -> return (Yes genv (f lenv) ())
+getInstEnv :: VM (InstEnv, InstEnv)
+getInstEnv = readGEnv global_inst_env
+
+getFamInstEnv :: VM FamInstEnvs
+getFamInstEnv = readGEnv global_fam_inst_env
+
+getBindName :: VM FastString
+getBindName = readLEnv local_bind_name
+
+inBind :: Id -> VM a -> VM a
+inBind id p
+ = do updLEnv $ \env -> env { local_bind_name = occNameFS (getOccName id) }
+ p
+
+cloneName :: (OccName -> OccName) -> Name -> VM Name
+cloneName mk_occ name = liftM make (liftDs newUnique)
+ where
+ occ_name = mk_occ (nameOccName name)
+
+ make u | isExternalName name = mkExternalName u (nameModule name)
+ occ_name
+ (nameSrcSpan name)
+ | otherwise = mkSystemName u occ_name
+
+cloneId :: (OccName -> OccName) -> Id -> Type -> VM Id
+cloneId mk_occ id ty
+ = do
+ name <- cloneName mk_occ (getName id)
+ let id' | isExportedId id = Id.mkExportedLocalId name ty
+ | otherwise = Id.mkLocalId name ty
+ return id'
+
+newExportedVar :: OccName -> Type -> VM Var
+newExportedVar occ_name ty
+ = do
+ mod <- liftDs getModuleDs
+ u <- liftDs newUnique
+
+ let name = mkExternalName u mod occ_name noSrcSpan
+
+ return $ Id.mkExportedLocalId name ty
+
newLocalVar :: FastString -> Type -> VM Var
newLocalVar fs ty
= do
u <- liftDs newUnique
return $ mkSysLocal fs u ty
+newDummyVar :: Type -> VM Var
+newDummyVar = newLocalVar FSLIT("ds")
+
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 = readGEnv $ \env -> lookupNameEnv (global_tycons env) (tyConName tc)
+defGlobalVar :: Var -> Var -> VM ()
+defGlobalVar v v' = updGEnv $ \env ->
+ env { global_vars = extendVarEnv (global_vars env) v v'
+ , global_exported_vars = upd (global_exported_vars env)
+ }
+ where
+ upd env | isExportedId v = extendVarEnv env v (v, v')
+ | otherwise = env
+
+lookupVar :: Var -> VM (Scope Var (Var, Var))
+lookupVar v
+ = do
+ r <- readLEnv $ \env -> lookupVarEnv (local_vars env) v
+ case r of
+ Just e -> return (Local e)
+ Nothing -> liftM Global
+ $ traceMaybeV "lookupVar" (ppr v)
+ (readGEnv $ \env -> lookupVarEnv (global_vars env) v)
-extendTyVarPA :: Var -> CoreExpr -> VM ()
-extendTyVarPA tv pa = updLEnv $ \env -> env { local_tyvar_pa = extendVarEnv (local_tyvar_pa env) tv pa }
+lookupTyCon :: TyCon -> VM (Maybe TyCon)
+lookupTyCon tc
+ | isUnLiftedTyCon tc || isTupleTyCon tc = return (Just tc)
+
+ | otherwise = readGEnv $ \env -> lookupNameEnv (global_tycons env) (tyConName tc)
+
+defTyCon :: TyCon -> TyCon -> VM ()
+defTyCon tc tc' = updGEnv $ \env ->
+ env { global_tycons = extendNameEnv (global_tycons env) (tyConName tc) tc' }
+
+lookupDataCon :: DataCon -> VM (Maybe DataCon)
+lookupDataCon dc = readGEnv $ \env -> lookupNameEnv (global_datacons env) (dataConName dc)
+
+defDataCon :: DataCon -> DataCon -> VM ()
+defDataCon dc dc' = updGEnv $ \env ->
+ env { global_datacons = extendNameEnv (global_datacons env) (dataConName dc) dc' }
+
+lookupPrimPArray :: TyCon -> VM (Maybe TyCon)
+lookupPrimPArray = liftDs . primPArray
+
+lookupPrimMethod :: TyCon -> String -> VM (Maybe Var)
+lookupPrimMethod tycon = liftDs . primMethod tycon
+
+lookupTyConPA :: TyCon -> VM (Maybe Var)
+lookupTyConPA tc = readGEnv $ \env -> lookupNameEnv (global_pa_funs env) (tyConName tc)
+
+defTyConPA :: TyCon -> Var -> VM ()
+defTyConPA tc pa = updGEnv $ \env ->
+ env { global_pa_funs = extendNameEnv (global_pa_funs env) (tyConName tc) pa }
+
+defTyConPAs :: [(TyCon, Var)] -> VM ()
+defTyConPAs ps = updGEnv $ \env ->
+ env { global_pa_funs = extendNameEnvList (global_pa_funs env)
+ [(tyConName tc, pa) | (tc, pa) <- ps] }
+
+lookupTyVarPA :: Var -> VM (Maybe CoreExpr)
+lookupTyVarPA tv = readLEnv $ \env -> lookupVarEnv (local_tyvar_pa env) tv
+
+lookupTyConPR :: TyCon -> VM (Maybe Var)
+lookupTyConPR tc = readGEnv $ \env -> lookupNameEnv (global_pr_funs env) (tyConName tc)
+
+defLocalTyVar :: TyVar -> VM ()
+defLocalTyVar tv = updLEnv $ \env ->
+ env { local_tyvars = tv : local_tyvars env
+ , local_tyvar_pa = local_tyvar_pa env `delVarEnv` tv
+ }
+
+defLocalTyVarWithPA :: TyVar -> CoreExpr -> VM ()
+defLocalTyVarWithPA tv pa = updLEnv $ \env ->
+ env { local_tyvars = tv : local_tyvars env
+ , local_tyvar_pa = extendVarEnv (local_tyvar_pa env) tv pa
+ }
+
+localTyVars :: VM [TyVar]
+localTyVars = readLEnv (reverse . local_tyvars)
+
+-- Look up the dfun of a class instance.
+--
+-- The match must be unique - ie, match exactly one instance - but the
+-- type arguments used for matching may be more specific than those of
+-- the class instance declaration. The found class instances must not have
+-- any type variables in the instance context that do not appear in the
+-- instances head (i.e., no flexi vars); for details for what this means,
+-- see the docs at InstEnv.lookupInstEnv.
+--
+{-
+lookupInst :: Class -> [Type] -> VM (DFunId, [Type])
+lookupInst cls tys
+ = do { instEnv <- getInstEnv
+ ; case lookupInstEnv instEnv cls tys of
+ ([(inst, inst_tys)], _)
+ | noFlexiVar -> return (instanceDFunId inst, inst_tys')
+ | otherwise -> pprPanic "VectMonad.lookupInst: flexi var: "
+ (ppr $ mkTyConApp (classTyCon cls) tys)
+ where
+ inst_tys' = [ty | Right ty <- inst_tys]
+ noFlexiVar = all isRight inst_tys
+ _other -> traceNoV "lookupInst" (ppr cls <+> ppr tys)
+ }
+ where
+ isRight (Left _) = False
+ isRight (Right _) = True
+-}
+
+-- Look up the representation tycon of a family instance.
+--
+-- The match must be unique - ie, match exactly one instance - but the
+-- type arguments used for matching may be more specific than those of
+-- the family instance declaration.
+--
+-- Return the instance tycon and its type instance. For example, if we have
+--
+-- lookupFamInst 'T' '[Int]' yields (':R42T', 'Int')
+--
+-- then we have a coercion (ie, type instance of family instance coercion)
+--
+-- :Co:R42T Int :: T [Int] ~ :R42T Int
+--
+-- which implies that :R42T was declared as 'data instance T [a]'.
+--
+lookupFamInst :: TyCon -> [Type] -> VM (TyCon, [Type])
+lookupFamInst tycon tys
+ = ASSERT( isOpenTyCon tycon )
+ do { instEnv <- getFamInstEnv
+ ; case lookupFamInstEnv instEnv tycon tys of
+ [(fam_inst, rep_tys)] -> return (famInstTyCon fam_inst, rep_tys)
+ _other ->
+ pprPanic "VectMonad.lookupFamInst: not found: "
+ (ppr $ mkTyConApp tycon tys)
+ }
initV :: HscEnv -> ModGuts -> VectInfo -> VM a -> IO (Maybe (VectInfo, a))
initV hsc_env guts info p
go
return r
where
- go = do
- builtins <- initBuiltins
- r <- runVM p builtins (initGlobalEnv info) emptyLocalEnv
- case r of
- Yes genv _ x -> return $ Just (new_info genv, x)
- No -> return Nothing
+
+ go =
+ do
+ builtins <- initBuiltins
+ let builtin_tycons = initBuiltinTyCons builtins
+ builtin_pas <- initBuiltinPAs builtins
+ builtin_prs <- initBuiltinPRs builtins
+
+ eps <- ioToIOEnv $ hscEPS hsc_env
+ let famInstEnvs = (eps_fam_inst_env eps, mg_fam_inst_env guts)
+ instEnvs = (eps_inst_env eps, mg_inst_env guts)
+
+ let genv = extendTyConsEnv builtin_tycons
+ . extendPAFunsEnv builtin_pas
+ . setPRFunsEnv builtin_prs
+ $ initGlobalEnv info instEnvs famInstEnvs
+
+ r <- runVM p builtins genv emptyLocalEnv
+ case r of
+ Yes genv _ x -> return $ Just (new_info genv, x)
+ No -> return Nothing
new_info genv = updVectInfo genv (mg_types guts) info
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