import CoreSyn
import CoreUtils
import CoreFVs
+import DataCon
import TyCon
import Type
import TypeRep
import Var
import VarEnv
+import VarSet
import Name ( mkSysTvName )
import NameEnv
import Id
+import MkId ( unwrapFamInstScrut )
import DsMonad hiding (mapAndUnzipM)
+import DsUtils ( mkCoreTup, mkCoreTupTy )
import PrelNames
+import TysWiredIn
+import BasicTypes ( Boxity(..) )
import Outputable
import FastString
lexpr <- replicateP vexpr lc
return (vexpr, lexpr)
where
- mk_app e = do
- vtys <- mapM vectType tys
- dicts <- mapM paDictOfType vtys
- return $ mkApps e [arg | (vty, dict) <- zip vtys dicts
- , arg <- [Type vty, dict]]
+ mk_app e = applyToTypes e =<< mapM vectType tys
-vectPolyExpr :: CoreExpr -> CoreExprWithFVs -> VM (CoreExpr, CoreExpr)
-vectPolyExpr lc expr
+abstractOverTyVars :: [TyVar] -> ((CoreExpr -> CoreExpr) -> VM a) -> VM a
+abstractOverTyVars tvs p
= do
mdicts <- mapM mk_dict_var tvs
-
- -- FIXME: shadowing (tvs in lc)
- (vmono, lmono) <- localV
- $ do
- zipWithM_ (\tv -> maybe (deleteTyVarPA tv) (extendTyVarPA tv . Var))
- tvs mdicts
- vectExpr lc mono
- return (mk_lams tvs mdicts vmono, mk_lams tvs mdicts lmono)
+ zipWithM_ (\tv -> maybe (deleteTyVarPA tv) (extendTyVarPA tv . Var)) tvs mdicts
+ p (mk_lams mdicts)
where
- (tvs, mono) = collectAnnTypeBinders expr
-
mk_dict_var tv = do
r <- paDictArgType tv
case r of
Just ty -> liftM Just (newLocalVar FSLIT("dPA") ty)
Nothing -> return Nothing
- mk_lams tvs mdicts = mkLams [arg | (tv, mdict) <- zip tvs mdicts
- , arg <- tv : maybeToList mdict]
+ mk_lams mdicts = mkLams [arg | (tv, mdict) <- zip tvs mdicts
+ , arg <- tv : maybeToList mdict]
+
+applyToTypes :: CoreExpr -> [Type] -> VM CoreExpr
+applyToTypes expr tys
+ = do
+ dicts <- mapM paDictOfType tys
+ return $ mkApps expr [arg | (ty, dict) <- zip tys dicts
+ , arg <- [Type ty, dict]]
+
+
+vectPolyExpr :: CoreExpr -> CoreExprWithFVs -> VM (CoreExpr, CoreExpr)
+vectPolyExpr lc expr
+ = localV
+ . abstractOverTyVars tvs $ \mk_lams ->
+ -- FIXME: shadowing (tvs in lc)
+ do
+ (vmono, lmono) <- vectExpr lc mono
+ return $ (mk_lams vmono, mk_lams lmono)
+ where
+ (tvs, mono) = collectAnnTypeBinders expr
vectExpr :: CoreExpr -> CoreExprWithFVs -> VM (CoreExpr, CoreExpr)
vectExpr lc (_, AnnType ty)
vectExpr lc e@(_, AnnLam bndr body)
| isTyVar bndr = pprPanic "vectExpr" (ppr $ deAnnotate e)
+vectExpr lc (fvs, AnnLam bndr body)
+ = do
+ let tyvars = filter isTyVar (varSetElems fvs)
+ info <- mkCEnvInfo fvs bndr body
+ (poly_vfn, poly_lfn) <- mkClosureFns info tyvars bndr body
+
+ vfn_var <- hoistExpr FSLIT("vfn") poly_vfn
+ lfn_var <- hoistExpr FSLIT("lfn") poly_lfn
+
+ let (venv, lenv) = mkClosureEnvs info lc
+
+ let env_ty = cenv_vty info
+
+ pa_dict <- paDictOfType env_ty
+
+ arg_ty <- vectType (varType bndr)
+ res_ty <- vectType (exprType $ deAnnotate body)
+
+ -- FIXME: move the functions to the top level
+ mono_vfn <- applyToTypes (Var vfn_var) (map TyVarTy tyvars)
+ mono_lfn <- applyToTypes (Var lfn_var) (map TyVarTy tyvars)
+
+ mk_clo <- builtin mkClosureVar
+ mk_cloP <- builtin mkClosurePVar
+
+ let vclo = Var mk_clo `mkTyApps` [arg_ty, res_ty, env_ty]
+ `mkApps` [pa_dict, mono_vfn, mono_lfn, venv]
+
+ lclo = Var mk_cloP `mkTyApps` [arg_ty, res_ty, env_ty]
+ `mkApps` [pa_dict, mono_vfn, mono_lfn, lenv]
+
+ return (vclo, lclo)
+
+
+data CEnvInfo = CEnvInfo {
+ cenv_vars :: [Var]
+ , cenv_values :: [(CoreExpr, CoreExpr)]
+ , cenv_vty :: Type
+ , cenv_lty :: Type
+ , cenv_repr_tycon :: TyCon
+ , cenv_repr_tyargs :: [Type]
+ , cenv_repr_datacon :: DataCon
+ }
+
+mkCEnvInfo :: VarSet -> Var -> CoreExprWithFVs -> VM CEnvInfo
+mkCEnvInfo fvs arg body
+ = do
+ locals <- readLEnv local_vars
+ let
+ (vars, vals) = unzip
+ [(var, val) | var <- varSetElems fvs
+ , Just val <- [lookupVarEnv locals var]]
+ vtys <- mapM (vectType . varType) vars
+
+ (vty, repr_tycon, repr_tyargs, repr_datacon) <- mk_env_ty vtys
+ lty <- mkPArrayType vty
+
+ return $ CEnvInfo {
+ cenv_vars = vars
+ , cenv_values = vals
+ , cenv_vty = vty
+ , cenv_lty = lty
+ , cenv_repr_tycon = repr_tycon
+ , cenv_repr_tyargs = repr_tyargs
+ , cenv_repr_datacon = repr_datacon
+ }
+ where
+ mk_env_ty [vty]
+ = return (vty, error "absent cinfo_repr_tycon"
+ , error "absent cinfo_repr_tyargs"
+ , error "absent cinfo_repr_datacon")
+
+ mk_env_ty vtys
+ = do
+ let ty = mkCoreTupTy vtys
+ (repr_tc, repr_tyargs) <- lookupPArrayFamInst ty
+ let [repr_con] = tyConDataCons repr_tc
+ return (ty, repr_tc, repr_tyargs, repr_con)
+
+
+
+mkClosureEnvs :: CEnvInfo -> CoreExpr -> (CoreExpr, CoreExpr)
+mkClosureEnvs info lc
+ | [] <- vals
+ = (Var unitDataConId, mkApps (Var $ dataConWrapId (cenv_repr_datacon info))
+ [lc, Var unitDataConId])
+
+ | [(vval, lval)] <- vals
+ = (vval, lval)
+
+ | otherwise
+ = (mkCoreTup vvals, Var (dataConWrapId $ cenv_repr_datacon info)
+ `mkTyApps` cenv_repr_tyargs info
+ `mkApps` (lc : lvals))
+
+ where
+ vals = cenv_values info
+ (vvals, lvals) = unzip vals
+
+mkClosureFns :: CEnvInfo -> [TyVar] -> Var -> CoreExprWithFVs
+ -> VM (CoreExpr, CoreExpr)
+mkClosureFns info tyvars arg body
+ = closedV
+ . abstractOverTyVars tyvars
+ $ \mk_tlams ->
+ do
+ (vfn, lfn) <- mkClosureMonoFns info arg body
+ return (mk_tlams vfn, mk_tlams lfn)
+
+mkClosureMonoFns :: CEnvInfo -> Var -> CoreExprWithFVs -> VM (CoreExpr, CoreExpr)
+mkClosureMonoFns info arg body
+ = do
+ lc_bndr <- newLocalVar FSLIT("lc") intTy
+ (varg : vbndrs, larg : lbndrs, (vbody, lbody))
+ <- vectBndrsIn (arg : cenv_vars info)
+ (vectExpr (Var lc_bndr) body)
+
+ venv_bndr <- newLocalVar FSLIT("env") vty
+ lenv_bndr <- newLocalVar FSLIT("env") lty
+
+ let vcase = bind_venv (Var venv_bndr) vbody vbndrs
+ lcase <- bind_lenv (Var lenv_bndr) lbody lc_bndr lbndrs
+ return (mkLams [venv_bndr, varg] vcase, mkLams [lenv_bndr, larg] lcase)
+ where
+ vty = cenv_vty info
+ lty = cenv_lty info
+
+ arity = length (cenv_vars info)
+
+ bind_venv venv vbody [] = vbody
+ bind_venv venv vbody [vbndr] = Let (NonRec vbndr venv) vbody
+ bind_venv venv vbody vbndrs
+ = Case venv (mkWildId vty) (exprType vbody)
+ [(DataAlt (tupleCon Boxed arity), vbndrs, vbody)]
+
+ bind_lenv lenv lbody lc_bndr [lbndr]
+ = do
+ lengthPA <- builtin lengthPAVar
+ return . Let (NonRec lbndr lenv)
+ $ Case (mkApps (Var lengthPA) [Type vty, (Var lbndr)])
+ lc_bndr
+ intTy
+ [(DEFAULT, [], lbody)]
+
+ bind_lenv lenv lbody lc_bndr lbndrs
+ = return
+ $ Case (unwrapFamInstScrut (cenv_repr_tycon info)
+ (cenv_repr_tyargs info)
+ lenv)
+ (mkWildId lty)
+ (exprType lbody)
+ [(DataAlt (cenv_repr_datacon info), lc_bndr : lbndrs, lbody)]
+
vectTyAppExpr :: CoreExpr -> CoreExprWithFVs -> [Type] -> VM (CoreExpr, CoreExpr)
vectTyAppExpr lc (_, AnnVar v) tys = vectPolyVar lc v tys
vectTyAppExpr lc e tys = pprPanic "vectTyAppExpr" (ppr $ deAnnotate e)
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