diff options
| -rw-r--r-- | compiler/vectorise/VectType.hs | 74 |
1 files changed, 72 insertions, 2 deletions
diff --git a/compiler/vectorise/VectType.hs b/compiler/vectorise/VectType.hs index 40a04f9c9c..08a8067561 100644 --- a/compiler/vectorise/VectType.hs +++ b/compiler/vectorise/VectType.hs @@ -21,7 +21,7 @@ import BasicTypes ( StrictnessMark(..), boolToRecFlag ) import Id ( mkWildId ) import Name ( Name ) import NameEnv -import TysWiredIn ( intTy ) +import TysWiredIn ( intTy, intDataCon ) import TysPrim ( intPrimTy ) import Unique @@ -31,7 +31,8 @@ import Digraph ( SCC(..), stronglyConnComp ) import Outputable -import Control.Monad ( liftM2, zipWithM, zipWithM_ ) +import Control.Monad ( liftM, liftM2, zipWithM, zipWithM_ ) +import Data.List ( inits, tails ) -- ---------------------------------------------------------------------------- -- Types @@ -266,6 +267,75 @@ buildLengthPA repr_tc [repr_dc] = tyConDataCons repr_tc shape_ty : repr_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 :: TyCon -> TyCon -> VM CoreExpr +buildReplicatePA 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 <- replicatePA len (ctr_num val) + reprs <- liftM concat $ mapM (mk_comp_arrs len val) vect_dcs + + return . mkLams [len_var, val_var] + $ mkConApp arr_dc (map (Type . TyVarTy) (tyConTyVars arr_tc) ++ (shape : reprs)) + where + val_ty = mkTyConApp vect_tc . mkTyVarTys $ tyConTyVars arr_tc + 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 + [(DataAlt dc, pre ++ (var : post), rep), (DEFAULT, [], empty)] + -- | 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 -- information about the conversion status of external tycons: |