-module VectType ( vectTyCon, vectType, vectTypeEnv )
+module VectType ( vectTyCon, vectType, vectTypeEnv,
+ PAInstance, painstInstance, buildPADict )
where
#include "HsVersions.h"
import VectUtils
import HscTypes ( TypeEnv, extendTypeEnvList, typeEnvTyCons )
+import CoreSyn
+import CoreUtils
import DataCon
import TyCon
import Type
import TypeRep
import Coercion
import FamInstEnv ( FamInst, mkLocalFamInst )
-import InstEnv ( Instance )
+import InstEnv ( Instance, mkLocalInstance, instanceDFunId )
import OccName
import MkId
-import BasicTypes ( StrictnessMark(..), boolToRecFlag )
-import Name ( Name )
+import BasicTypes ( StrictnessMark(..), OverlapFlag(..), boolToRecFlag )
+import Var ( Var )
+import Id ( mkWildId )
+import Name ( Name, getOccName )
import NameEnv
-import TysWiredIn ( intTy )
+import TysWiredIn ( intTy, intDataCon )
+import TysPrim ( intPrimTy )
import Unique
import UniqFM
import Outputable
-import Control.Monad ( liftM2, zipWithM, zipWithM_ )
+import Control.Monad ( liftM, liftM2, zipWithM, zipWithM_ )
+import Data.List ( inits, tails )
-- ----------------------------------------------------------------------------
-- Types
type TyConGroup = ([TyCon], UniqSet TyCon)
-vectTypeEnv :: TypeEnv -> VM (TypeEnv, [FamInst], [Instance])
+data PAInstance = PAInstance {
+ painstInstance :: Instance
+ , painstVectTyCon :: TyCon
+ , painstArrTyCon :: TyCon
+ }
+
+vectTypeEnv :: TypeEnv -> VM (TypeEnv, [FamInst], [PAInstance])
vectTypeEnv env
= do
cs <- readGEnv $ mk_map . global_tycons
keep_dcs = concatMap tyConDataCons keep_tcs
zipWithM_ defTyCon keep_tcs keep_tcs
zipWithM_ defDataCon keep_dcs keep_dcs
- vect_tcs <- vectTyConDecls conv_tcs
- parr_tcs1 <- mapM (\tc -> buildPArrayTyCon (tyConName tc) tc) keep_tcs
- parr_tcs2 <- zipWithM (buildPArrayTyCon . tyConName) conv_tcs vect_tcs
- let new_tcs = vect_tcs ++ parr_tcs1 ++ parr_tcs2
+ new_tcs <- vectTyConDecls conv_tcs
+
+ let orig_tcs = keep_tcs ++ conv_tcs
+ vect_tcs = keep_tcs ++ new_tcs
+
+ parr_tcs <- zipWithM buildPArrayTyCon orig_tcs vect_tcs
+ pa_insts <- zipWithM buildPAInstance vect_tcs parr_tcs
+
+ let all_new_tcs = new_tcs ++ parr_tcs
let new_env = extendTypeEnvList env
- (map ATyCon new_tcs
- ++ [ADataCon dc | tc <- new_tcs
+ (map ATyCon all_new_tcs
+ ++ [ADataCon dc | tc <- all_new_tcs
, dc <- tyConDataCons tc])
- return (new_env, map mkLocalFamInst (parr_tcs1 ++ parr_tcs2), [])
+ return (new_env, map mkLocalFamInst parr_tcs, pa_insts)
where
tycons = typeEnvTyCons env
groups = tyConGroups tycons
rep_arg_tys = dataConRepArgTys dc
tycon = dataConTyCon dc
-buildPArrayTyCon :: Name -> TyCon -> VM TyCon
-buildPArrayTyCon orig_name vect_tc = fixV $ \repr_tc ->
+buildPArrayTyCon :: TyCon -> TyCon -> VM TyCon
+buildPArrayTyCon orig_tc vect_tc = fixV $ \repr_tc ->
do
name' <- cloneName mkPArrayTyConOcc orig_name
parent <- buildPArrayParentInfo orig_name vect_tc repr_tc
False -- FIXME: no generics
False -- not GADT syntax
where
+ orig_name = tyConName orig_tc
name = tyConName vect_tc
kind = tyConKind vect_tc
tyvars = tyConTyVars vect_tc
types = [ty | dc <- tyConDataCons vect_tc
, ty <- dataConRepArgTys dc]
+buildPAInstance :: TyCon -> TyCon -> VM PAInstance
+buildPAInstance vect_tc arr_tc
+ = do
+ pa <- builtin paClass
+ let inst_ty = mkForAllTys tvs
+ . (mkFunTys $ mkPredTys [ClassP pa [ty] | ty <- arg_tys])
+ $ mkPredTy (ClassP pa [mkTyConApp vect_tc arg_tys])
+
+ dfun <- newExportedVar (mkPADFunOcc $ getOccName vect_tc) inst_ty
+
+ return $ PAInstance {
+ painstInstance = mkLocalInstance dfun NoOverlap
+ , painstVectTyCon = vect_tc
+ , painstArrTyCon = arr_tc
+ }
+ where
+ tvs = tyConTyVars arr_tc
+ arg_tys = mkTyVarTys tvs
+
+buildPADict :: PAInstance -> VM [(Var, CoreExpr)]
+buildPADict (PAInstance {
+ painstInstance = inst
+ , painstVectTyCon = vect_tc
+ , painstArrTyCon = arr_tc })
+ = localV . abstractOverTyVars (tyConTyVars arr_tc) $ \abstract ->
+ do
+ meth_binds <- mapM mk_method paMethods
+ let meth_exprs = map (Var . fst) meth_binds
+
+ pa_dc <- builtin paDictDataCon
+ let dict = mkConApp pa_dc (Type (mkTyConApp vect_tc arg_tys) : meth_exprs)
+ body = Let (Rec meth_binds) dict
+ return [(instanceDFunId inst, abstract body)]
+ where
+ tvs = tyConTyVars arr_tc
+ arg_tys = mkTyVarTys tvs
+
+ mk_method (name, build)
+ = localV
+ $ do
+ body <- build vect_tc arr_tc
+ var <- newLocalVar name (exprType body)
+ return (var, mkInlineMe body)
+
+paMethods = [(FSLIT("lengthPA"), buildLengthPA),
+ (FSLIT("replicatePA"), buildReplicatePA)]
+
+buildLengthPA :: TyCon -> TyCon -> VM CoreExpr
+buildLengthPA vect_tc arr_tc
+ = do
+ parr_ty <- mkPArrayType (mkTyConApp vect_tc arg_tys)
+ arg <- newLocalVar FSLIT("xs") parr_ty
+ let scrut = unwrapFamInstScrut arr_tc arg_tys (Var arg)
+ scrut_ty = exprType scrut
+ shape <- newLocalVar FSLIT("sel") shape_ty
+ body <- lengthPA (Var shape)
+ wilds <- mapM newDummyVar repr_tys
+ return . Lam arg
+ $ Case scrut (mkWildId scrut_ty) intPrimTy
+ [(DataAlt repr_dc, shape : wilds, body)]
+ where
+ arg_tys = mkTyVarTys $ tyConTyVars arr_tc
+ [repr_dc] = tyConDataCons arr_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:
projects / ghc-hetmet.git / blobdiff