import Id ( mkWildId )
import Name ( Name, getOccName )
import NameEnv
-import TysWiredIn ( unitTy, intTy, intDataCon )
+import TysWiredIn ( unitTy, intTy, intDataCon, unitDataConId )
import TysPrim ( intPrimTy )
import Unique
import Outputable
import Control.Monad ( liftM, liftM2, zipWithM, zipWithM_ )
-import Data.List ( inits, tails, zipWith4 )
+import Data.List ( inits, tails, zipWith4, zipWith5 )
-- ----------------------------------------------------------------------------
-- Types
parr_tcs <- zipWithM buildPArrayTyCon orig_tcs vect_tcs
dfuns <- mapM mkPADFun vect_tcs
defTyConPAs (zip vect_tcs dfuns)
- binds <- sequence (zipWith4 buildTyConBindings orig_tcs vect_tcs parr_tcs dfuns)
-
+ binds <- sequence (zipWith5 buildTyConBindings orig_tcs
+ vect_tcs
+ repr_tcs
+ parr_tcs
+ dfuns)
+
let all_new_tcs = new_tcs ++ repr_tcs ++ parr_tcs
let new_env = extendTypeEnvList env
buildPReprTyCon orig_tc vect_tc
= do
name <- cloneName mkPReprTyConOcc (tyConName orig_tc)
- rhs_ty <- buildPReprRhsTy vect_tc
+ rhs_ty <- buildPReprType vect_tc
prepr_tc <- builtin preprTyCon
liftDs $ buildSynTyCon name
tyvars
where
tyvars = tyConTyVars vect_tc
-buildPReprRhsTy :: TyCon -> VM Type
-buildPReprRhsTy = buildPReprTy . map dataConRepArgTys . tyConDataCons
+buildPReprType :: TyCon -> VM Type
+buildPReprType = liftM repr_type . mkTyConRepr
+
+buildToPRepr :: TyConRepr -> TyCon -> TyCon -> TyCon -> VM CoreExpr
+buildToPRepr (TyConRepr {
+ repr_tys = repr_tys
+ , repr_prod_tycons = prod_tycons
+ , repr_prod_tys = prod_tys
+ , repr_sum_tycon = repr_sum_tycon
+ , repr_type = repr_type
+ })
+ vect_tc prepr_tc _
+ = do
+ arg <- newLocalVar FSLIT("x") arg_ty
+ vars <- mapM (mapM (newLocalVar FSLIT("x"))) repr_tys
+
+ return . Lam arg
+ . wrapFamInstBody prepr_tc var_tys
+ . Case (Var arg) (mkWildId arg_ty) repr_type
+ . mk_alts data_cons vars
+ . zipWith3 mk_prod prod_tycons repr_tys $ map (map Var) vars
+ where
+ var_tys = mkTyVarTys $ tyConTyVars vect_tc
+ arg_ty = mkTyConApp vect_tc var_tys
+ data_cons = tyConDataCons vect_tc
+
+ Just sum_tycon = repr_sum_tycon
+ sum_datacons = tyConDataCons sum_tycon
+
+ mk_alts _ _ [] = [(DEFAULT, [], Var unitDataConId)]
+ mk_alts [dc] [vars] [expr] = [(DataAlt dc, vars, expr)]
+ mk_alts dcs vars exprs = zipWith4 mk_alt dcs vars sum_datacons exprs
-buildPReprTy :: [[Type]] -> VM Type
-buildPReprTy [] = panic "mkPRepr"
-buildPReprTy tys
+ mk_alt dc vars sum_dc expr = (DataAlt dc, vars,
+ mkConApp sum_dc (map Type prod_tys ++ [expr]))
+
+ mk_prod _ _ [] = Var unitDataConId
+ mk_prod _ _ [expr] = expr
+ mk_prod (Just tc) tys exprs = mkConApp dc (map Type tys ++ exprs)
+ where
+ [dc] = tyConDataCons tc
+
+buildToArrPRepr :: TyConRepr -> TyCon -> TyCon -> TyCon -> VM CoreExpr
+buildToArrPRepr _ vect_tc prepr_tc arr_tc
= do
- embed <- builtin embedTyCon
- plus <- builtin plusTyCon
- cross <- builtin crossTyCon
-
- return . foldr1 (mk_bin plus)
- . map (mkprod cross)
- . map (map (mk_un embed))
- $ tys
+ arg_ty <- mkPArrayType el_ty
+ rep_tys <- mapM (mapM mkPArrayType) rep_el_tys
+
+ arg <- newLocalVar FSLIT("xs") arg_ty
+ bndrss <- mapM (mapM (newLocalVar FSLIT("ys"))) rep_tys
+ len <- newLocalVar FSLIT("len") intPrimTy
+ sel <- newLocalVar FSLIT("sel") =<< mkPArrayType intTy
+
+ let add_sel xs | has_selector = sel : xs
+ | otherwise = xs
+
+ all_bndrs = len : add_sel (concat bndrss)
+
+ res <- parrayCoerce prepr_tc var_tys
+ =<< mkToArrPRepr (Var len) (Var sel) (map (map Var) bndrss)
+ res_ty <- mkPArrayType =<< mkPReprType el_ty
+
+ return . Lam arg
+ $ Case (unwrapFamInstScrut arr_tc var_tys (Var arg))
+ (mkWildId (mkTyConApp arr_tc var_tys))
+ res_ty
+ [(DataAlt arr_dc, all_bndrs, res)]
where
- mkprod cross [] = unitTy
- mkprod cross tys = foldr1 (mk_bin cross) tys
+ var_tys = mkTyVarTys $ tyConTyVars vect_tc
+ el_ty = mkTyConApp vect_tc var_tys
+ data_cons = tyConDataCons vect_tc
+ rep_el_tys = map dataConRepArgTys data_cons
+
+ [arr_dc] = tyConDataCons arr_tc
+
+ has_selector | [_] <- data_cons = False
+ | otherwise = True
+
- mk_un tc ty = mkTyConApp tc [ty]
- mk_bin tc ty1 ty2 = mkTyConApp tc [ty1,ty2]
+buildFromPRepr :: TyConRepr -> TyCon -> TyCon -> TyCon -> VM CoreExpr
+buildFromPRepr _ vect_tc prepr_tc _
+ = do
+ arg_ty <- mkPReprType res_ty
+ arg <- newLocalVar FSLIT("x") arg_ty
+ alts <- mapM mk_alt data_cons
+ body <- mkFromPRepr (unwrapFamInstScrut prepr_tc var_tys (Var arg))
+ res_ty alts
+ return $ Lam arg body
+ where
+ var_tys = mkTyVarTys $ tyConTyVars vect_tc
+ res_ty = mkTyConApp vect_tc var_tys
+ data_cons = tyConDataCons vect_tc
+
+ mk_alt dc = do
+ bndrs <- mapM (newLocalVar FSLIT("x")) $ dataConRepArgTys dc
+ return (bndrs, mkConApp dc (map Type var_tys ++ map Var bndrs))
+
+buildFromArrPRepr :: TyConRepr -> TyCon -> TyCon -> TyCon -> VM CoreExpr
+buildFromArrPRepr _ vect_tc prepr_tc arr_tc
+ = mkFromArrPRepr undefined undefined undefined undefined undefined undefined
+
+buildPRDict :: TyConRepr -> TyCon -> TyCon -> TyCon -> VM CoreExpr
+buildPRDict _ vect_tc prepr_tc _
+ = prCoerce prepr_tc var_tys
+ =<< prDictOfType (mkTyConApp prepr_tc var_tys)
+ where
+ var_tys = mkTyVarTys $ tyConTyVars vect_tc
buildPArrayTyCon :: TyCon -> TyCon -> VM TyCon
buildPArrayTyCon orig_tc vect_tc = fixV $ \repr_tc ->
return [e]
}
-buildTyConBindings :: TyCon -> TyCon -> TyCon -> Var -> VM [(Var, CoreExpr)]
-buildTyConBindings orig_tc vect_tc arr_tc dfun
+buildTyConBindings :: TyCon -> TyCon -> TyCon -> TyCon -> Var
+ -> VM [(Var, CoreExpr)]
+buildTyConBindings orig_tc vect_tc prepr_tc arr_tc dfun
= do
shape <- tyConShape vect_tc
+ repr <- mkTyConRepr vect_tc
sequence_ (zipWith4 (vectDataConWorker shape vect_tc arr_tc arr_dc)
orig_dcs
vect_dcs
(inits repr_tys)
(tails repr_tys))
- dict <- buildPADict shape vect_tc arr_tc dfun
+ dict <- buildPADict repr vect_tc prepr_tc arr_tc dfun
binds <- takeHoisted
return $ (dfun, dict) : binds
where
++ map Var args
++ empty_post
-buildPADict :: Shape -> TyCon -> TyCon -> Var -> VM CoreExpr
-buildPADict shape vect_tc arr_tc dfun
+buildPADict :: TyConRepr -> TyCon -> TyCon -> TyCon -> Var -> VM CoreExpr
+buildPADict repr vect_tc prepr_tc arr_tc dfun
= polyAbstract tvs $ \abstract ->
do
- meth_binds <- mapM (mk_method shape) paMethods
+ meth_binds <- mapM (mk_method repr) paMethods
let meth_exprs = map (Var . fst) meth_binds
pa_dc <- builtin paDataCon
tvs = tyConTyVars arr_tc
arg_tys = mkTyVarTys tvs
- mk_method shape (name, build)
+ mk_method repr (name, build)
= localV
$ do
- body <- build shape vect_tc arr_tc
+ body <- build repr vect_tc prepr_tc arr_tc
var <- newLocalVar name (exprType body)
return (var, mkInlineMe body)
-paMethods = [(FSLIT("lengthPA"), buildLengthPA),
- (FSLIT("replicatePA"), buildReplicatePA)]
-
-buildLengthPA :: Shape -> TyCon -> TyCon -> VM CoreExpr
-buildLengthPA shape vect_tc arr_tc
- = do
- parr_ty <- mkPArrayType (mkTyConApp vect_tc arg_tys)
- arg <- newLocalVar FSLIT("xs") parr_ty
- shapes <- mapM (newLocalVar FSLIT("sh")) shape_tys
- wilds <- mapM newDummyVar repr_tys
- let scrut = unwrapFamInstScrut arr_tc arg_tys (Var arg)
- scrut_ty = exprType scrut
-
- body <- shapeLength shape (map Var shapes)
-
- return . Lam arg
- $ Case scrut (mkWildId scrut_ty) intPrimTy
- [(DataAlt repr_dc, shapes ++ wilds, body)]
- where
- arg_tys = mkTyVarTys $ tyConTyVars arr_tc
- [repr_dc] = tyConDataCons arr_tc
-
- shape_tys = shapeReprTys shape
- repr_tys = drop (length shape_tys) (dataConRepArgTys repr_dc)
-
--- data T = C0 t1 ... tm
--- ...
--- Ck u1 ... un
---
--- data [:T:] = A ![:Int:] [:t1:] ... [:un:]
---
--- replicatePA :: Int# -> T -> [:T:]
--- replicatePA n# t
--- = let c = case t of
--- C0 _ ... _ -> 0
--- ...
--- Ck _ ... _ -> k
---
--- xs1 = case t of
--- C0 x1 _ ... _ -> replicatePA @t1 n# x1
--- _ -> emptyPA @t1
---
--- ...
---
--- ysn = case t of
--- Ck _ ... _ yn -> replicatePA @un n# yn
--- _ -> emptyPA @un
--- in
--- A (replicatePA @Int n# c) xs1 ... ysn
---
---
-
-buildReplicatePA :: Shape -> TyCon -> TyCon -> VM CoreExpr
-buildReplicatePA shape vect_tc arr_tc
- = do
- len_var <- newLocalVar FSLIT("n") intPrimTy
- val_var <- newLocalVar FSLIT("x") val_ty
-
- let len = Var len_var
- val = Var val_var
-
- shape_reprs <- shapeReplicate shape len (ctr_num val)
- reprs <- liftM concat $ mapM (mk_comp_arrs len val) vect_dcs
-
- return . mkLams [len_var, val_var]
- . wrapFamInstBody arr_tc arg_tys
- $ mkConApp arr_dc (map Type arg_tys ++ shape_reprs ++ reprs)
- where
- arg_tys = mkTyVarTys (tyConTyVars arr_tc)
- val_ty = mkTyConApp vect_tc arg_tys
- wild = mkWildId val_ty
- vect_dcs = tyConDataCons vect_tc
- [arr_dc] = tyConDataCons arr_tc
-
- ctr_num val = Case val wild intTy (zipWith ctr_num_alt vect_dcs [0..])
- ctr_num_alt dc i = (DataAlt dc, map mkWildId (dataConRepArgTys dc),
- mkConApp intDataCon [mkIntLitInt i])
-
-
- mk_comp_arrs len val dc = let tys = dataConRepArgTys dc
- wilds = map mkWildId tys
- in
- sequence (zipWith3 (mk_comp_arr len val dc)
- tys (inits wilds) (tails wilds))
-
- mk_comp_arr len val dc ty pre (_:post)
- = do
- var <- newLocalVar FSLIT("x") ty
- rep <- replicatePA len (Var var)
- empty <- emptyPA ty
- arr_ty <- mkPArrayType ty
-
- return $ Case val wild arr_ty
- [(DEFAULT, [], empty), (DataAlt dc, pre ++ (var : post), rep)]
+paMethods = [(FSLIT("toPRepr"), buildToPRepr),
+ (FSLIT("fromPRepr"), buildFromPRepr),
+ (FSLIT("toArrPRepr"), buildToArrPRepr),
+ (FSLIT("fromArrPRepr"), buildFromArrPRepr),
+ (FSLIT("dictPRepr"), buildPRDict)]
-- | Split the given tycons into two sets depending on whether they have to be
-- converted (first list) or not (second list). The first argument contains
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