module VectUtils (
collectAnnTypeBinders, collectAnnTypeArgs, isAnnTypeArg,
+ collectAnnValBinders,
splitClosureTy,
mkPADictType, mkPArrayType,
- paDictArgType, paDictOfType,
- paMethod, lengthPA, replicatePA, emptyPA,
+ paDictArgType, paDictOfType, paDFunType,
+ paMethod, lengthPA, replicatePA, emptyPA, liftPA,
+ polyAbstract, polyApply, polyVApply,
lookupPArrayFamInst,
- hoistExpr, takeHoisted
+ hoistBinding, hoistExpr, hoistPolyVExpr, takeHoisted,
+ buildClosure, buildClosures,
+ mkClosureApp
) where
#include "HsVersions.h"
+import VectCore
import VectMonad
+import DsUtils
import CoreSyn
import CoreUtils
import Type
import TypeRep
import TyCon
+import DataCon ( dataConWrapId )
import Var
+import Id ( mkWildId )
+import MkId ( unwrapFamInstScrut )
import PrelNames
+import TysWiredIn
+import BasicTypes ( Boxity(..) )
import Outputable
import FastString
-import Control.Monad ( liftM )
+import Control.Monad ( liftM, zipWithM_ )
collectAnnTypeArgs :: AnnExpr b ann -> (AnnExpr b ann, [Type])
collectAnnTypeArgs expr = go expr []
go bs (_, AnnLam b e) | isTyVar b = go (b:bs) e
go bs e = (reverse bs, e)
+collectAnnValBinders :: AnnExpr Var ann -> ([Var], AnnExpr Var ann)
+collectAnnValBinders expr = go [] expr
+ where
+ go bs (_, AnnLam b e) | isId b = go (b:bs) e
+ go bs e = (reverse bs, e)
+
isAnnTypeArg :: AnnExpr b ann -> Bool
isAnnTypeArg (_, AnnType t) = True
isAnnTypeArg _ = False
isClosureTyCon :: TyCon -> Bool
-isClosureTyCon tc = tyConUnique tc == closureTyConKey
+isClosureTyCon tc = tyConName tc == closureTyConName
splitClosureTy :: Type -> (Type, Type)
splitClosureTy ty
| otherwise = pprPanic "splitClosureTy" (ppr ty)
+isPArrayTyCon :: TyCon -> Bool
+isPArrayTyCon tc = tyConName tc == parrayTyConName
+
+splitPArrayTy :: Type -> Type
+splitPArrayTy ty
+ | Just (tc, [arg_ty]) <- splitTyConApp_maybe ty
+ , isPArrayTyCon tc
+ = arg_ty
+
+ | otherwise = pprPanic "splitPArrayTy" (ppr ty)
+
+mkClosureType :: Type -> Type -> VM Type
+mkClosureType arg_ty res_ty
+ = do
+ tc <- builtin closureTyCon
+ return $ mkTyConApp tc [arg_ty, res_ty]
+
+mkClosureTypes :: [Type] -> Type -> VM Type
+mkClosureTypes arg_tys res_ty
+ = do
+ tc <- builtin closureTyCon
+ return $ foldr (mk tc) res_ty arg_tys
+ where
+ mk tc arg_ty res_ty = mkTyConApp tc [arg_ty, res_ty]
+
mkPADictType :: Type -> VM Type
mkPADictType ty
= do
- tc <- builtin paDictTyCon
+ tc <- builtin paTyCon
return $ TyConApp tc [ty]
mkPArrayType :: Type -> VM Type
paDFunApply dfun ty_args
paDictOfTyApp (TyConApp tc _) ty_args
= do
- pa_class <- builtin paClass
- (dfun, ty_args') <- lookupInst pa_class [TyConApp tc ty_args]
- paDFunApply (Var dfun) ty_args'
+ dfun <- traceMaybeV "paDictOfTyApp" (ppr tc) (lookupTyConPA tc)
+ paDFunApply (Var dfun) ty_args
paDictOfTyApp ty ty_args = pprPanic "paDictOfTyApp" (ppr ty)
+paDFunType :: TyCon -> VM Type
+paDFunType tc
+ = do
+ margs <- mapM paDictArgType tvs
+ res <- mkPADictType (mkTyConApp tc arg_tys)
+ return . mkForAllTys tvs
+ $ mkFunTys [arg | Just arg <- margs] res
+ where
+ tvs = tyConTyVars tc
+ arg_tys = mkTyVarTys tvs
+
paDFunApply :: CoreExpr -> [Type] -> VM CoreExpr
paDFunApply dfun tys
= do
return $ mkApps (Var fn) [Type ty, dict]
lengthPA :: CoreExpr -> VM CoreExpr
-lengthPA x = liftM (`App` x) (paMethod lengthPAVar (exprType x))
+lengthPA x = liftM (`App` x) (paMethod lengthPAVar ty)
+ where
+ ty = splitPArrayTy (exprType x)
replicatePA :: CoreExpr -> CoreExpr -> VM CoreExpr
replicatePA len x = liftM (`mkApps` [len,x])
emptyPA :: Type -> VM CoreExpr
emptyPA = paMethod emptyPAVar
+liftPA :: CoreExpr -> VM CoreExpr
+liftPA x
+ = do
+ lc <- builtin liftingContext
+ replicatePA (Var lc) x
+
+newLocalVVar :: FastString -> Type -> VM VVar
+newLocalVVar fs vty
+ = do
+ lty <- mkPArrayType vty
+ vv <- newLocalVar fs vty
+ lv <- newLocalVar fs lty
+ return (vv,lv)
+
+polyAbstract :: [TyVar] -> ((CoreExpr -> CoreExpr) -> VM a) -> VM a
+polyAbstract tvs p
+ = localV
+ $ do
+ mdicts <- mapM mk_dict_var tvs
+ zipWithM_ (\tv -> maybe (defLocalTyVar tv) (defLocalTyVarWithPA tv . Var)) tvs mdicts
+ p (mk_lams mdicts)
+ where
+ mk_dict_var tv = do
+ r <- paDictArgType tv
+ case r of
+ Just ty -> liftM Just (newLocalVar FSLIT("dPA") ty)
+ Nothing -> return Nothing
+
+ mk_lams mdicts = mkLams (tvs ++ [dict | Just dict <- mdicts])
+
+polyApply :: CoreExpr -> [Type] -> VM CoreExpr
+polyApply expr tys
+ = do
+ dicts <- mapM paDictOfType tys
+ return $ expr `mkTyApps` tys `mkApps` dicts
+
+polyVApply :: VExpr -> [Type] -> VM VExpr
+polyVApply expr tys
+ = do
+ dicts <- mapM paDictOfType tys
+ return $ mapVect (\e -> e `mkTyApps` tys `mkApps` dicts) expr
+
lookupPArrayFamInst :: Type -> VM (TyCon, [Type])
lookupPArrayFamInst ty = builtin parrayTyCon >>= (`lookupFamInst` [ty])
+hoistBinding :: Var -> CoreExpr -> VM ()
+hoistBinding v e = updGEnv $ \env ->
+ env { global_bindings = (v,e) : global_bindings env }
+
hoistExpr :: FastString -> CoreExpr -> VM Var
hoistExpr fs expr
= do
var <- newLocalVar fs (exprType expr)
- updGEnv $ \env ->
- env { global_bindings = (var, expr) : global_bindings env }
+ hoistBinding var expr
return var
+hoistVExpr :: VExpr -> VM VVar
+hoistVExpr (ve, le)
+ = do
+ fs <- getBindName
+ vv <- hoistExpr ('v' `consFS` fs) ve
+ lv <- hoistExpr ('l' `consFS` fs) le
+ return (vv, lv)
+
+hoistPolyVExpr :: [TyVar] -> VM VExpr -> VM VExpr
+hoistPolyVExpr tvs p
+ = do
+ expr <- closedV . polyAbstract tvs $ \abstract ->
+ liftM (mapVect abstract) p
+ fn <- hoistVExpr expr
+ polyVApply (vVar fn) (mkTyVarTys tvs)
+
takeHoisted :: VM [(Var, CoreExpr)]
takeHoisted
= do
setGEnv $ env { global_bindings = [] }
return $ global_bindings env
+mkClosure :: Type -> Type -> Type -> VExpr -> VExpr -> VM VExpr
+mkClosure arg_ty res_ty env_ty (vfn,lfn) (venv,lenv)
+ = do
+ dict <- paDictOfType env_ty
+ mkv <- builtin mkClosureVar
+ mkl <- builtin mkClosurePVar
+ return (Var mkv `mkTyApps` [arg_ty, res_ty, env_ty] `mkApps` [dict, vfn, lfn, venv],
+ Var mkl `mkTyApps` [arg_ty, res_ty, env_ty] `mkApps` [dict, vfn, lfn, lenv])
+
+mkClosureApp :: VExpr -> VExpr -> VM VExpr
+mkClosureApp (vclo, lclo) (varg, larg)
+ = do
+ vapply <- builtin applyClosureVar
+ lapply <- builtin applyClosurePVar
+ return (Var vapply `mkTyApps` [arg_ty, res_ty] `mkApps` [vclo, varg],
+ Var lapply `mkTyApps` [arg_ty, res_ty] `mkApps` [lclo, larg])
+ where
+ (arg_ty, res_ty) = splitClosureTy (exprType vclo)
+
+buildClosures :: [TyVar] -> [VVar] -> [Type] -> Type -> VM VExpr -> VM VExpr
+buildClosures tvs vars [arg_ty] res_ty mk_body
+ = buildClosure tvs vars arg_ty res_ty mk_body
+buildClosures tvs vars (arg_ty : arg_tys) res_ty mk_body
+ = do
+ res_ty' <- mkClosureTypes arg_tys res_ty
+ arg <- newLocalVVar FSLIT("x") arg_ty
+ buildClosure tvs vars arg_ty res_ty'
+ . hoistPolyVExpr tvs
+ $ do
+ lc <- builtin liftingContext
+ clo <- buildClosures tvs (vars ++ [arg]) arg_tys res_ty mk_body
+ return $ vLams lc (vars ++ [arg]) clo
+
+-- (clo <x1,...,xn> <f,f^>, aclo (Arr lc xs1 ... xsn) <f,f^>)
+-- where
+-- f = \env v -> case env of <x1,...,xn> -> e x1 ... xn v
+-- f^ = \env v -> case env of Arr l xs1 ... xsn -> e^ l x1 ... xn v
+--
+buildClosure :: [TyVar] -> [VVar] -> Type -> Type -> VM VExpr -> VM VExpr
+buildClosure tvs vars arg_ty res_ty mk_body
+ = do
+ (env_ty, env, bind) <- buildEnv vars
+ env_bndr <- newLocalVVar FSLIT("env") env_ty
+ arg_bndr <- newLocalVVar FSLIT("arg") arg_ty
+
+ fn <- hoistPolyVExpr tvs
+ $ do
+ lc <- builtin liftingContext
+ body <- mk_body
+ body' <- bind (vVar env_bndr)
+ (vVarApps lc body (vars ++ [arg_bndr]))
+ return (vLamsWithoutLC [env_bndr, arg_bndr] body')
+
+ mkClosure arg_ty res_ty env_ty fn env
+
+buildEnv :: [VVar] -> VM (Type, VExpr, VExpr -> VExpr -> VM VExpr)
+buildEnv vvs
+ = do
+ lc <- builtin liftingContext
+ let (ty, venv, vbind) = mkVectEnv tys vs
+ (lenv, lbind) <- mkLiftEnv lc tys ls
+ return (ty, (venv, lenv),
+ \(venv,lenv) (vbody,lbody) ->
+ do
+ let vbody' = vbind venv vbody
+ lbody' <- lbind lenv lbody
+ return (vbody', lbody'))
+ where
+ (vs,ls) = unzip vvs
+ tys = map idType vs
+
+mkVectEnv :: [Type] -> [Var] -> (Type, CoreExpr, CoreExpr -> CoreExpr -> CoreExpr)
+mkVectEnv [] [] = (unitTy, Var unitDataConId, \env body -> body)
+mkVectEnv [ty] [v] = (ty, Var v, \env body -> Let (NonRec v env) body)
+mkVectEnv tys vs = (ty, mkCoreTup (map Var vs),
+ \env body -> Case env (mkWildId ty) (exprType body)
+ [(DataAlt (tupleCon Boxed (length vs)), vs, body)])
+ where
+ ty = mkCoreTupTy tys
+
+mkLiftEnv :: Var -> [Type] -> [Var] -> VM (CoreExpr, CoreExpr -> CoreExpr -> VM CoreExpr)
+mkLiftEnv lc [ty] [v]
+ = return (Var v, \env body ->
+ do
+ len <- lengthPA (Var v)
+ return . Let (NonRec v env)
+ $ Case len lc (exprType body) [(DEFAULT, [], body)])
+
+-- NOTE: this transparently deals with empty environments
+mkLiftEnv lc tys vs
+ = do
+ (env_tc, env_tyargs) <- lookupPArrayFamInst vty
+ let [env_con] = tyConDataCons env_tc
+
+ env = Var (dataConWrapId env_con)
+ `mkTyApps` env_tyargs
+ `mkVarApps` (lc : vs)
+
+ bind env body = let scrut = unwrapFamInstScrut env_tc env_tyargs env
+ in
+ return $ Case scrut (mkWildId (exprType scrut))
+ (exprType body)
+ [(DataAlt env_con, lc : bndrs, body)]
+ return (env, bind)
+ where
+ vty = mkCoreTupTy tys
+
+ bndrs | null vs = [mkWildId unitTy]
+ | otherwise = vs
+
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