lhc-0.6.20081216: src/Grin/FromE.hs
module Grin.FromE(compile) where
import Char
import Control.Monad.Reader
import Control.Monad.Trans
import Data.Graph(stronglyConnComp, SCC(..))
import Data.IORef
import Data.Monoid
import List
import Maybe
import qualified Data.Set as Set
import qualified Data.Map as Map
import StringTable.Atom
--import C.Arch
import C.FFI hiding(Primitive)
import C.Prims
import Control.Monad.Identity
import DataConstructors
import Doc.DocLike
import Doc.PPrint
import Doc.Pretty
import E.E
import E.FreeVars
import E.Program
import E.TypeCheck
import E.Values
import GenUtil
import Grin.Grin
import Grin.Noodle
import Grin.Show
import Grin.Val
import Info.Types
import Name.Id
import Name.Name
import Name.Names
import Options
import Stats(mtick)
import Support.CanType
import Support.FreeVars
--import Support.Tuple
import Util.Graph as G
import Util.Once
import Util.SetLike
import Util.UniqueMonad()
import qualified C.FFI as FFI
import qualified Cmm.Op as Op
import Cmm.Op(ToCmmTy(..))
import qualified FlagDump as FD
import qualified Info.Info as Info
import qualified Stats
{- | Tags
'f' - normal function
'F' - postponed function
'P' - partial application of function
'C' - data constructor
'T' - type constructor
'Y' - partial application of type constructor (think, broken T)
'b' - built in funttion
'B' - postponed built in function (built in functions may not be partially applied)
'@' - very special function or tag
-}
-------------------
-- Compile E -> Exp
-------------------
unboxedMap :: [(Name,Ty)]
unboxedMap = [
(tc_World__,TyUnit),
(tc_Ref__,TyPtr tyINode),
(tc_Array__,TyPtr tyINode),
(tc_MutArray__,TyPtr tyINode)
]
newtype C a = C (ReaderT LEnv IO a)
deriving(Monad,MonadReader LEnv,UniqueProducer,Functor,MonadIO,Stats.MonadStats)
runC :: LEnv -> C a -> IO a
runC lenv (C x) = runReaderT x lenv
data LEnv = LEnv {
evaledMap :: IdMap Val,
lfuncMap :: IdMap (Atom,Int,[Ty])
}
data CEnv = CEnv {
scMap :: IdMap (Atom,[Ty],[Ty]),
ccafMap :: IdMap Val,
tyEnv :: IORef TyEnv,
funcBaps :: IORef [(Atom,Lam)],
errorOnce :: OnceMap ([Ty],String) Atom,
dataTable :: DataTable,
counter :: IORef Int
}
dumpTyEnv (TyEnv tt) = mapM_ putStrLn $ sort [ fromAtom n <+> hsep (map show as) <+> "::" <+> show t <> f z <> g th| (n,TyTy { tySlots = as, tyReturn = t, tySiblings = z, tyThunk = th}) <- Map.toList tt] where
f Nothing = mempty
f (Just v) = text " " <> tshow v
g TyNotThunk = mempty
g x = text " " <> tshow x
tagArrow = convertName tc_Arrow
flattenScc xs = concatMap f xs where
f (AcyclicSCC x) = [x]
f (CyclicSCC xs) = xs
instance Op.ToCmmTy Name where
toCmmTy n = do
RawType <- return $ nameType n
toCmmTy $ show n
instance Op.ToCmmTy E where
toCmmTy (ELit LitCons { litName = tname, litArgs = [], litAliasFor = af, litType = eh }) | eh == eHash = toCmmTy tname `mplus` (af >>= toCmmTy)
toCmmTy _ = Nothing
scTag n
| Just nm <- fromId (tvrIdent n) = toAtom ('f':show nm)
| otherwise = toAtom ('f':show (tvrIdent n))
cafNum n = V $ - fromAtom (partialTag (scTag n) 0)
toEntry (n,as,e) = f (scTag n) where
f x = (x,map (toType tyINode . tvrType ) as,toTypes TyNode (getType (e::E) :: E))
--stringNameToTy :: String -> Ty
--stringNameToTy n = TyPrim (archOpTy archInfo n)
toType :: Ty -> E -> Ty
toType node = toty . followAliases mempty where
toty (ELit LitCons { litName = n, litArgs = [], litType = ty }) | ty == eHash, TypeConstructor <- nameType n, Just 0 <- fromUnboxedNameTuple n = TyUnit
toty e | Just t <- toCmmTy e = TyPrim t
toty e@(ELit LitCons { litName = n, litType = ty }) | ty == eHash = case lookup n unboxedMap of
Just x -> x
Nothing -> error $ "Grin.FromE.toType: " ++ show e
toty e | sortKindLike e = tyDNode
toty _ = node
toTypes :: Ty -> E -> [Ty]
toTypes node = toty . followAliases mempty where
toty (ELit LitCons { litName = n, litArgs = es, litType = ty }) | ty == eHash, TypeConstructor <- nameType n, Just _ <- fromUnboxedNameTuple n = keepIts $ map (toType tyINode) es
toty e | Just t <- toCmmTy e = [TyPrim t]
toty e@(ELit LitCons { litName = n, litType = ty }) | ty == eHash = case lookup n unboxedMap of
Just TyUnit -> []
Just x -> [x]
Nothing -> error $ "Grin.FromE.toType: " ++ show e
toty e | sortKindLike e = [tyDNode]
toty _ = [node]
toTyTy (as,r) = tyTy { tySlots = as, tyReturn = r }
{-# NOINLINE compile #-}
compile :: Program -> IO Grin
compile prog@Program { progDataTable = dataTable } = do
let entries = progEntryPoints prog
mainEntry = progMainEntry prog
tyEnv <- liftIO $ newIORef initTyEnv
funcBaps <- liftIO $ newIORef []
counter <- liftIO $ newIORef 100000 -- TODO real number
let (cc,reqcc,rcafs) = constantCaf prog
funcMain = toAtom "b_main"
wdump FD.Progress $ do
putErrLn $ "Found" <+> tshow (length cc) <+> "CAFs to convert to constants," <+> tshow (length reqcc) <+> "of which are recursive."
putErrLn "Recursive"
putDocMLn putStr $ vcat [ pprint v | v <- reqcc ]
putErrLn "Constant"
putDocMLn putStr $ vcat [ pprint v <+> pprint n <+> pprint e | (v,n,e) <- cc ]
putErrLn "CAFS"
putDocMLn putStr $ vcat [ pprint v <+> pprint n <+> pprint e | (v,n,e) <- rcafs ]
errorOnce <- newOnceMap
let doCompile = compile' cenv
lenv = LEnv { evaledMap = mempty, lfuncMap = mempty }
cenv = CEnv {
funcBaps = funcBaps,
tyEnv = tyEnv,
scMap = scMap,
counter = counter,
dataTable = dataTable,
errorOnce = errorOnce,
ccafMap = fromList $ [(tvrIdent v,e) |(v,_,e) <- cc ] ++ [ (tvrIdent v,Var vv (TyPtr TyNode)) | (v,vv,_) <- rcafs]
}
ds <- runC lenv $ mapM doCompile [ c | c@(v,_,_) <- map combTriple $ progCombinators prog, v `notElem` [x | (x,_,_) <- cc]]
wdump FD.Progress $ do
os <- onceMapToList errorOnce
mapM_ print os
let tf a = a:tagToFunction a
ds <- return $ flattenScc $ stronglyConnComp [ (a,x, concatMap tf (freeVars z)) | a@(x,(_ :-> z)) <- ds]
-- FFI
let tvrAtom t = liftM convertName (fromId $ tvrIdent t)
let ef x = do n <- tvrAtom x
return (n, [] :-> discardResult (App (scTag x) [] []))
ep x = do when verbose $ putStrLn ("EP FOR "++show x)
n <- tvrAtom x
case Info.lookup (tvrInfo x) of
Just l -> return [(n, l)]
Nothing -> return []
-- efv <- mapM ef entries -- FIXME
efv <- return []
epv <- liftM concat $ mapM ep entries
enames <- mapM tvrAtom entries
TyEnv endTyEnv <- readIORef tyEnv
-- FIXME correct types.
let newTyEnv = TyEnv $ Map.fromList (Map.toList endTyEnv ++ [(funcMain, toTyTy ([],[]))] ++ [(en, toTyTy ([],[])) | en <- enames])
wdump FD.Tags $ do
dumpTyEnv newTyEnv
fbaps <- readIORef funcBaps
let cafs = [ (x,y) | (_,x,y) <- rcafs ]
initCafs = sequenceG_ [ Update (Var v (TyPtr TyNode)) node | (v,node) <- cafs ]
ds' = ds ++ fbaps
a @>> b = a :>>= ([] :-> b)
sequenceG_ [] = Return []
sequenceG_ (x:xs) = foldl (@>>) x xs
let grin = setGrinFunctions theFuncs emptyGrin {
grinEntryPoints = Map.insert funcMain (FfiExport "_amain" Safe CCall, ([],"void")) $
Map.fromList epv,
grinPhase = PhaseInit,
grinTypeEnv = newTyEnv,
grinCafs = [ (x,NodeC tagHole []) | (x,_) <- cafs]
}
theFuncs = (funcMain ,[] :-> initCafs :>>= [] :-> discardResult (App (scTag mainEntry) [] [])) : efv ++ ds'
return grin
where
scMap = fromList [ (tvrIdent t,toEntry x) | x@(t,_,_) <- map combTriple $ progCombinators prog]
initTyEnv = mappend primTyEnv $ TyEnv $ Map.fromList $ concat [ makePartials (a,b,c) | (_,(a,b,c)) <- massocs scMap] ++ concat [con x| x <- Map.elems $ constructorMap dataTable, conType x /= eHash]
con c | (EPi (TVr { tvrType = a }) b,_) <- fromLam $ conExpr c = return $ (tagArrow,toTyTy ([tyDNode, tyDNode],[TyNode]))
con c | keepCon = return $ (n,TyTy { tyThunk = TyNotThunk, tySlots = keepIts as, tyReturn = [TyNode], tySiblings = fmap (map convertName) sibs}) where
n | sortKindLike (conType c) = convertName (conName c)
| otherwise = convertName (conName c)
as = [ toType (TyPtr TyNode) s | s <- conSlots c]
keepCon = isNothing (conVirtual c) || TypeConstructor == nameType (conName c)
sibs = getSiblings dataTable (conName c)
con _ = fail "not needed"
discardResult exp = exp :>>= map (Var v0) (getType exp) :-> Return []
shouldKeep :: E -> Bool
shouldKeep e = TyUnit /= toType TyNode e
class Keepable a where
keepIt :: a -> Bool
--instance Keepable E where
-- keepIt = shouldKeep
instance Keepable Ty where
keepIt t = t /= TyUnit
instance Keepable Val where
keepIt t = getType t /= TyUnit
keepIts xs = filter keepIt xs
tySusp fn ts = (partialTag fn 0,(toTyTy (keepIts ts,[TyNode])) { tyThunk = TySusp fn })
makePartials (fn,ts,rt) | 'f':_ <- show fn = (fn,toTyTy (keepIts ts,rt)):f undefined 0 (reverse ts) where
f _ 0 ts = tySusp fn (reverse ts):f fn 1 ts
f nfn n (t:ts) = (mfn,(toTyTy (reverse $ keepIts ts,[TyNode])) { tyThunk = TyPApp (if keepIt t then Just t else Nothing) nfn }):f mfn (n + 1) ts where
mfn = partialTag fn n
f _ _ [] = []
-- ans = (fn,toTyTy (keepIts ts,rt)):[(partialTag fn i,toTyTy (keepIts $ reverse $ drop i $ reverse ts ,TyNode)) | i <- [0.. length ts] ]
makePartials x = error "makePartials"
primTyEnv = TyEnv . Map.map toTyTy $ Map.fromList $ [
(tagArrow,([tyDNode, tyDNode],[TyNode])),
(funcEval, ([tyINode],[tyDNode])),
(tagHole, ([],[TyNode]))
]
-- | constant CAF analysis
-- In grin, partial applications are constant data, rather than functions. Since
-- many cafs consist of constant applications, we preprocess them into values
-- beforehand. This also catches recursive constant toplevel bindings.
--
-- takes a program and returns (cafs which are actually constants,which are recursive,rest of cafs)
constantCaf :: Program -> ([(TVr,Var,Val)],[Var],[(TVr,Var,Val)])
constantCaf Program { progDataTable = dataTable, progCombinators = combs } = ans where
ds = map combTriple combs
-- All CAFS
ecafs = [ (v,e) | (v,[],e) <- ds ]
-- just CAFS that can be converted to constants need dependency analysis
(lbs',cafs) = G.findLoopBreakers (const 0) (const True) $ G.newGraph (filter (canidate . snd) ecafs) (tvrIdent . fst) (freeVars . snd)
lbs = Set.fromList $ fsts lbs'
canidate (ELit _) = True
canidate (EPi _ _) = True
canidate e | (EVar x,as) <- fromAp e, Just vs <- mlookup x res, vs > length as = True
canidate _ = False
ans = ([ (v,cafNum v,conv e) | (v,e) <- cafs ],[ cafNum v | (v,_) <- cafs, v `Set.member` lbs ], [(v,cafNum v, NodeC (partialTag n 0) []) | (v,e) <- ecafs, not (canidate e), let n = scTag v ])
res = Map.fromList [ (v,length vs) | (v,vs,_) <- ds]
coMap = Map.fromList [ (v,ce)| (v,_,ce) <- fst3 ans]
conv :: E -> Val
conv e | Just [v] <- literal e = v
conv (ELit lc@LitCons { litName = n, litArgs = es }) | Just nn <- getName lc = (Const (NodeC nn (keepIts $ map conv es)))
conv (EPi (TVr { tvrIdent = 0, tvrType = a}) b) = Const $ NodeC tagArrow [conv a,conv b]
conv (EVar v) | v `Set.member` lbs = Var (cafNum v) (TyPtr TyNode)
conv e | (EVar x,as) <- fromAp e, Just vs <- mlookup x res, vs > length as = Const (NodeC (partialTag (scTag x) (vs - length as)) (keepIts $ map conv as))
conv (EVar v) | Just ce <- mlookup v coMap = ce
conv e@(EVar v) | isLifted e = Var (cafNum v) tyINode
| otherwise = Var (cafNum v) tyDNode
conv x = error $ "conv: " ++ show x
getName = getName' dataTable
fst3 (x,_,_) = x
getName' :: (Show a,Monad m) => DataTable -> Lit a E -> m Atom
getName' dataTable v@LitCons { litName = n, litArgs = es }
| Just _ <- fromUnboxedNameTuple n = fail $ "unboxed tuples don't have names silly"
| conAlias cons /= NotAlias = error $ "Alias still exists: " ++ show v
| length es == nargs = do
return cn
| nameType n == TypeConstructor && length es < nargs = do
return ((partialTag cn (nargs - length es)))
| otherwise = error $ "Strange name: " ++ show v ++ show nargs ++ show cons
where
cn = convertName n
cons = runIdentity $ getConstructor n dataTable
nargs = length (conSlots cons)
instance ToVal TVr where
toVal TVr { tvrType = ty, tvrIdent = num } = case toType (TyPtr TyNode) ty of
-- TyTup [] -> Tup []
ty -> Var (V num) ty
doApply x y ty | not (keepIt y) = App funcApply [x] ty
doApply x y ty = App funcApply [x,y] ty
evalVar :: [Ty] -> TVr -> C Exp
evalVar fty tvr = do
let v = toVal tvr
if getType v == tyDNode then return $ Return [v] else do
em <- asks evaledMap
case mlookup (tvrIdent tvr) em of
Just v -> do
mtick "Grin.FromE.strict-evaled"
return (Return [v])
-- Nothing | not isFGrin, Just CaseDefault <- Info.lookup (tvrInfo tvr) -> do
-- mtick "Grin.FromE.strict-casedefault"
-- return (Fetch (toVal tvr))
Nothing | getProperty prop_WHNF tvr -> do
mtick "Grin.FromE.strict-propevaled"
return (Fetch (toVal tvr))
Nothing -> return $ App funcEval [toVal tvr] fty
compile' :: CEnv -> (TVr,[TVr],E) -> C (Atom,Lam)
compile' cenv (tvr,as,e) = ans where
ans = do
--putStrLn $ "Compiling: " ++ show nn
x <- cr e
let (nn,_,_) = fromJust $ mlookup (tvrIdent tvr) (scMap cenv)
return (nn,((keepIts $ map toVal as) :-> x))
funcName = maybe (show $ tvrIdent tvr) show (fromId (tvrIdent tvr))
cc, ce, cr :: E -> C Exp
cr x = ce x
-- | ce evaluates something in strict context returning the evaluated result of its argument.
ce (ELetRec ds e) = doLet ds (ce e)
ce (EError s e) = return (Error s (toTypes TyNode e))
ce (EVar tvr) | isUnboxed (getType tvr) = do
return (Return $ keepIts [toVal tvr])
ce (EVar tvr) | not $ isLifted (EVar tvr) = do
mtick "Grin.FromE.strict-unlifted"
return (Return $ keepIts [toVal tvr])
--return (Fetch (toVal tvr))
ce e | (EVar tvr,as) <- fromAp e = do
as <- return $ args as
lfunc <- asks lfuncMap
let fty = toTypes TyNode (getType e)
case mlookup (tvrIdent tvr) (ccafMap cenv) of
Just (Const c) -> app fty (Return [c]) as
Just x@Var {} -> app fty (gEval x) as
Nothing | Just (v,n,rt) <- mlookup (tvrIdent tvr) lfunc -> do
let (x,y) = splitAt n as
app fty (App v (keepIts x) rt) y
Nothing -> case mlookup (tvrIdent tvr) (scMap cenv) of
Just (v,as',es)
| length as >= length as' -> do
let (x,y) = splitAt (length as') as
app fty (App v (keepIts x) es) y
| otherwise -> do
let pt = partialTag v (length as' - length as)
return $ Return [NodeC pt (keepIts as)]
Nothing | not (isLifted $ EVar tvr) -> do
mtick "Grin.FromE.app-unlifted"
app fty (Return [toVal tvr]) as
Nothing -> do
case as of
[] -> evalVar fty tvr
_ -> do
ee <- evalVar [TyNode] tvr
app fty ee as
ce e | Just z <- literal e = return (Return z)
ce e | Just (Const z) <- constant e = return (Return $ keepIts [z])
ce e | Just z <- constant e = return (gEval z)
ce e | Just z <- con e = return (Return z)
ce (EPrim ap@(APrim (PrimPrim prim) _) as _) = f (fromAtom prim) as where
-- artificial dependencies
f "newWorld__" [_] = do
return $ Return []
f "dependingOn" [e,_] = ce e
-- references
f "newRef__" [v,_] = do
let [v'] = args [v]
return $ Alloc { expValue = v', expCount = toUnVal (1::Int), expRegion = region_heap, expInfo = mempty }
f "readRef__" [r,_] = do
let [r'] = args [r]
return $ Fetch (Index r' (toUnVal (0::Int)))
f "writeRef__" [r,v,_] = do
let [r',v'] = args [r,v]
return $ Update (Index r' (toUnVal (0::Int))) v'
-- arrays
f "newMutArray__" [v,def,_] = do
let [v',def'] = args [v,def]
return $ Alloc { expValue = def', expCount = v', expRegion = region_heap, expInfo = mempty }
f "newBlankMutArray__" [v,_] = do
let [v'] = args [v]
return $ Alloc { expValue = ValUnknown (TyPtr TyNode), expCount = v', expRegion = region_heap, expInfo = mempty }
f "readArray__" [r,o,_] = do
let [r',o'] = args [r,o]
return $ Fetch (Index r' o')
f "indexArray__" [r,o] = do
let [r',o'] = args [r,o]
return $ Fetch (Index r' o')
f "writeArray__" [r,o,v,_] = do
let [r',o',v'] = args [r,o,v]
return $ Update (Index r' o') v'
f ft [v,_] | ft `elem` ["unsafeFreezeArray__", "unsafeThawArray__"] = do
let [v'] = args [v]
return $ Return [v']
f p xs = fail $ "Grin.FromE - Unknown primitive: " ++ show (p,xs)
-- other primitives
ce (EPrim ap@(APrim p _) xs ty) = do
let prim = ap
xs' = keepIts $ args xs
ty' = toTypes TyNode ty
case p of
Func True fn as "void" -> return $ Prim ap xs' ty'
Func True fn as r -> return $ Prim ap xs' ty'
Func False _ as r | Just _ <- toCmmTy ty -> do
return $ Prim ap xs' ty'
IFunc True _ _ ->
return $ Prim ap xs' ty'
IFunc False _ _ | Just _ <- toCmmTy ty ->
return $ Prim ap xs' ty'
Peek pt' | [addr] <- xs -> do
return $ Prim ap (args [addr]) ty'
Peek pt' -> do
let [_,addr] = xs
return $ Prim ap (args [addr]) ty'
Poke pt' -> do
let [_,addr,val] = xs
return $ Prim ap (args [addr,val]) []
Op (Op.BinOp _ a1 a2) rt -> do
return $ Prim ap (args xs) ty'
Op (Op.UnOp _ a1) rt -> do
return $ Prim ap (args xs) ty'
Op (Op.ConvOp _ a1) rt -> do
return $ Prim ap (args xs) ty'
other -> fail $ "ce unknown primitive: " ++ show other
-- case statements
ce ECase { eCaseScrutinee = e, eCaseAlts = [Alt LitCons { litName = n, litArgs = xs } wh] } | Just _ <- fromUnboxedNameTuple n, DataConstructor <- nameType n = do
e <- ce e
wh <- ce wh
return $ e :>>= (keepIts $ map toVal xs) :-> wh
ce ECase { eCaseScrutinee = e, eCaseAlts = [], eCaseDefault = (Just r)} | not (shouldKeep (getType e)) = do
e <- ce e
r <- ce r
return $ e :>>= [] :-> r
ce ECase { eCaseScrutinee = e, eCaseBind = b, eCaseAlts = as, eCaseDefault = d } | Just ty <- toCmmTy (getType e :: E) = do
v <- if tvrIdent b == 0 then newPrimVar $ TyPrim ty else return $ toVal b
e <- ce e
as' <- mapM cp'' as
def <- createDef d (return (toVal b))
return $
e :>>= [v] :-> Case v (as' ++ def)
ce ECase { eCaseScrutinee = scrut, eCaseBind = b, eCaseAlts = as, eCaseDefault = d } = do
v <- newNodeVar
e <- ce scrut
case (b,scrut) of
(TVr { tvrIdent = 0 },EVar etvr) -> localEvaled [etvr] v $ do
as <- mapM cp as
def <- createDef d newNodeVar
return $ e :>>= [v] :-> Case v (as ++ def)
(_,EVar etvr) -> localEvaled [etvr,b] v $ do
as <- mapM cp as
def <- createDef d newNodeVar
return $ e :>>= [v] :-> Return [toVal etvr] :>>= [toVal b] :-> Case v (as ++ def)
(TVr { tvrIdent = 0 },_) -> do
as <- mapM cp as
def <- createDef d newNodeVar
return $ e :>>= [v] :-> Case v (as ++ def)
(_,_) | isLifted scrut -> localEvaled [b] v $ do
as <- mapM cp as
def <- createDef d newNodeVar
return $ e :>>= [v] :-> Store v :>>= [toVal b] :-> Case v (as ++ def)
(_,_) | otherwise -> do
as <- mapM cp as
def <- createDef d newNodeVar
return $ e :>>= [toVal b] :-> Case v (as ++ def)
ce e = error $ "ce: " ++ render (pprint (funcName,e))
localEvaled vs v action = local (\lenv -> lenv { evaledMap = nm `mappend` evaledMap lenv }) action where
nm = fromList [ (tvrIdent x, v) | x <- vs, tvrIdent x /= 0 ]
localFuncs vs action = local (\lenv -> lenv { lfuncMap = fromList vs `mappend` lfuncMap lenv }) action
createDef Nothing _ = return []
createDef (Just e) nnv = do
nv <- nnv
x <- ce e
return [[nv] :-> x]
cp (Alt lc@LitCons { litName = n, litArgs = es } e) = do
x <- ce e
nn <- getName lc
return ([NodeC nn (keepIts $ map toVal es)] :-> x)
cp x = error $ "cp: " ++ show (funcName,x)
cp'' (Alt (LitInt i t) e) | Just ty <- toCmmTy t = do
x <- ce e
return ([Lit i $ TyPrim ty] :-> x)
getName x = getName' (dataTable cenv) x
app :: [Ty] -> Exp -> [Val] -> C Exp
app _ e [] = return e
app ty e [a] | not (keepIt a) = do
v <- newNodeVar
return (e :>>= [v] :-> App funcApply [v] ty)
app ty e [a] = do
v <- newNodeVar
return (e :>>= [v] :-> doApply v a ty)
app ty e (a:as) | not (keepIt a) = do
v <- newNodeVar
app ty (e :>>= [v] :-> App funcApply [v] [TyNode]) as
app ty e (a:as) = do
v <- newNodeVar
app ty (e :>>= [v] :-> doApply v a [TyNode]) as
app' e [] = return $ Return [e]
app' e as = do
mtick "Grin.FromE.lazy-app-bap"
V vn <- newVar
let t = toAtom $ "Bap_" ++ show (length as) ++ "_" ++ funcName ++ "_" ++ show vn
tl = toAtom $ "bap_" ++ show (length as) ++ "_" ++ funcName ++ "_" ++ show vn
targs = [Var v ty | v <- [v1..] | ty <- (TyPtr TyNode:map getType as)]
s = Store (NodeC t (keepIts $ e:as))
d <- app [TyNode] (gEval p1) (tail targs)
liftIO $ addNewFunction cenv (tl,(keepIts targs) :-> d)
return s
addNewFunction cenv tl@(n,args :-> body) = do
liftIO $ modifyIORef (funcBaps cenv) (tl:)
let addt (TyEnv mp) = TyEnv $ Map.insert sfn sft (Map.insert n (toTyTy (args',getType body)) mp)
(sfn,sft) = tySusp n args'
args' = map getType args
liftIO $ modifyIORef (tyEnv cenv) addt
-- | cc evaluates something in lazy context, returning a pointer to a node which when evaluated will produce the strict result.
-- it is an invarient that evaling (cc e) produces the same value as (ce e)
cc (EPrim don [e,_] _) | don == p_dependingOn = cc e
cc e | Just _ <- literal e = error "unboxed literal in lazy context"
cc e | Just z <- constant e = return (Return $ keepIts [z])
cc e | Just [z] <- con e = return $ if isLifted e then Store z else Return [z]
cc (EError s e) = do
let ty = toTypes TyNode e
a <- liftIO $ runOnceMap (errorOnce cenv) (ty,s) $ do
u <- newUniq
let t = toAtom $ "Berr_" ++ show u
tl = toAtom $ "berr_" ++ show u
addNewFunction cenv (tl,[] :-> Error s ty)
return t
return $ Return [Const (NodeC a [])]
cc (ELetRec ds e) = doLet ds (cc e)
cc e | (EVar v,as@(_:_)) <- fromAp e = do
as <- return $ args as
case mlookup (tvrIdent v) (scMap cenv) of
Just (_,[],_) | Just x <- constant (EVar v) -> app' x as
Just (v,as',es)
| length as > length as' -> do
let (x,y) = splitAt (length as') as
let s = Store (NodeC (partialTag v 0) (keepIts x))
nv <- newNodePtrVar
z <- app' nv y
return $ s :>>= [nv] :-> z
-- | length as < length as', all valIsConstant as -> do
-- let pt = partialTag v (length as' - length as)
-- mtick "Grin.FromE.partial-constant"
-- return $ Return (Const (NodeC pt as))
| length as < length as' -> do
let pt = partialTag v (length as' - length as)
as <- return $ keepIts as
return $ if all valIsConstant as
then Return [Const (NodeC pt as)]
else Store (NodeC pt as)
| otherwise -> do -- length as == length as'
return $ Store (NodeC (tagFlipFunction v) (keepIts as))
Nothing -> app' (toVal v) as
cc (EVar v) = do
return $ Return [toVal v]
cc e = return $ error ("cc: " ++ show e)
doLet ds e = f (decomposeDs ds) e where
f [] x = x
f (Left te@(_,ELam {}):ds) x = f (Right [te]:ds) x
f (Left (t,e):ds) x | not (isLifted (EVar t)) = do
mtick "Grin.FromE.let-unlifted"
e <- ce e
z <- newNodeVar
v <- localEvaled [t] z $ f ds x
return $ (e :>>= [z] :-> Return [z]) :>>= [toVal t] :-> v
f (Left (t,e):ds) x = do
e <- cc e
v <- f ds x
return $ e :>>= [toVal t] :-> v
-- All recursive lets should have been lifted to the top-level.
f (Right bs:ds) x | any (isELam . snd) bs = error "Unlifted let in Grin.FromE.compile'"
f (Right bs:ds) x | any (isELam . snd) bs = do
let g (t,e@(~ELam {})) = do
let (a,as) = fromLam e
(nn,_,_) = toEntry (t,[],getType t)
x <- ce a
return $ [createFuncDef True nn ((keepIts $ map toVal as) :-> x)]
g' (t,e@(~ELam {})) =
let (a,as) = fromLam e
(nn,_,_) = toEntry (t,[],getType t)
in (tvrIdent t,(nn,length as,toTypes TyNode (getType a)))
localFuncs (map g' bs) $ do
v <- f ds x
defs <- mapM g bs
return $ grinLet (concat defs) v
f (Right bs:ds) x = do
let u [] ss dus = return (\y -> ss (dus y))
u ((tvr,e):rs) ss dus = do
v <- newNodePtrVar
v' <- newNodeVar
e <- cc e
let (du,t,ts) = doUpdate (toVal tvr) e
u rs (\y -> Store (NodeC t (map ValUnknown ts)) :>>= [toVal tvr] :-> ss y) (\y -> du :>>= [] :-> dus y)
rr <- u bs id id
v <- f ds x
return (rr v)
-- This avoids a blind update on recursive thunks
doUpdate vr (Store n@(NodeC t ts)) = (Update vr n,t,map getType ts)
doUpdate vr (x :>>= v :-> e) = let (du,t,ts) = doUpdate vr e in (x :>>= v :-> du,t,ts)
doUpdate vr x = error $ "doUpdate: " ++ show x
args es = map f es where
f x | Just [] <- literal x = Unit
f x | Just [z] <- literal x = z
f x | Just z <- constant x = z
f (EVar tvr) = toVal tvr
f x = error $ "invalid argument: " ++ show x
-- | Takes an E and returns something constant which is either a pointer to
-- a constant heap location only pointing to global values or constants.
-- this includes a CAF which may be evaluated, a literal, a saturated
-- application of constant values to a supercombinator, or a constructor
-- containing constant values. constant is sort of a misnomer here when
-- runtime behavior is considered, it means a compile time constant, the
-- CAFs may be updated with evaluated values.
constant :: Monad m => E -> m Val
constant (EVar tvr) | Just c <- mlookup (tvrIdent tvr) (ccafMap cenv) = return c
| Just (v,as,_) <- mlookup (tvrIdent tvr) (scMap cenv)
, t <- partialTag v (length as), tagIsWHNF t = if isLifted (EVar tvr) then return $ Const $ NodeC t [] else return (NodeC t [])
-- False -> return $ Var (V $ - fromAtom t) (TyPtr TyNode)
constant e | Just [l] <- literal e = return l
constant e@(ELit lc@LitCons { litName = n, litArgs = es }) | Just es <- mapM constant es, Just nn <- getName lc = if isLifted e
then return $ Const (NodeC nn (keepIts es))
else return (NodeC nn (keepIts es))
constant (EPi (TVr { tvrIdent = 0, tvrType = a}) b) | Just a <- constant a, Just b <- constant b = return $ NodeC tagArrow [a,b]
constant _ = fail "not a constant term"
-- | convert a constructor into a Val, arguments may depend on local vars.
con :: Monad m => E -> m [Val]
con (EPi (TVr {tvrIdent = 0, tvrType = x}) y) = do
return $ [NodeC tagArrow (args [x,y])]
con v@(ELit LitCons { litName = n, litArgs = es })
| conAlias cons /= NotAlias = error $ "Alias still exists: " ++ show v
| Just v <- fromUnboxedNameTuple n, DataConstructor <- nameType n = do
return ((keepIts $ args es))
| length es == nargs = do
return [NodeC cn (keepIts $ args es)]
| nameType n == TypeConstructor && length es < nargs = do
return [NodeC (partialTag cn (nargs - length es)) $ keepIts (args es)]
where
cn = convertName n
cons = runIdentity $ getConstructor n (dataTable cenv)
nargs = length (conSlots cons)
con _ = fail "not constructor"
scInfo tvr | Just n <- mlookup (tvrIdent tvr) (scMap cenv) = return n
scInfo tvr = fail $ "not a supercombinator:" <+> show tvr
newNodeVar = fmap (\x -> Var x TyNode) newVar
newPrimVar ty = fmap (\x -> Var x ty) newVar
newNodePtrVar = fmap (\x -> Var x (TyPtr TyNode)) newVar
newVar = do
i <- liftIO $ readIORef (counter cenv)
liftIO $ (writeIORef (counter cenv) $! (i + 2))
return $! V i
-- | converts an unboxed literal
literal :: Monad m => E -> m [Val]
literal (ELit LitCons { litName = n, litArgs = xs }) | Just xs <- mapM literal xs, Just _ <- fromUnboxedNameTuple n = return (keepIts $ concat xs)
literal (ELit (LitInt i ty)) | Just ptype <- toCmmTy ty = return $ [Lit i (TyPrim ptype)]
literal (ELit (LitInt i (ELit (LitCons { litArgs = [], litAliasFor = Just af })))) = literal $ ELit (LitInt i af)
literal (EPrim aprim@(APrim p _) xs ty) | Just ptype <- toCmmTy ty, primIsConstant p = do
xs <- mapM literal xs
return $ [ValPrim aprim (concat xs) (TyPrim ptype)]
literal _ = fail "not a literal term"