1 module Vectorise( vectorise )
4 #include "HsVersions.h"
12 import CoreLint ( showPass, endPass )
16 import SimplMonad ( SimplCount, zeroSimplCount )
17 import Rules ( RuleBase )
25 import Name ( mkSysTvName, getName )
28 import MkId ( unwrapFamInstScrut )
31 import DsMonad hiding (mapAndUnzipM)
32 import DsUtils ( mkCoreTup, mkCoreTupTy )
36 import TysPrim ( intPrimTy )
37 import BasicTypes ( Boxity(..) )
41 import Control.Monad ( liftM, liftM2, mapAndUnzipM, zipWithM_ )
42 import Data.Maybe ( maybeToList )
44 vectorise :: HscEnv -> UniqSupply -> RuleBase -> ModGuts
45 -> IO (SimplCount, ModGuts)
46 vectorise hsc_env _ _ guts
48 showPass dflags "Vectorisation"
50 let info = hptVectInfo hsc_env `plusVectInfo` eps_vect_info eps
51 Just (info', guts') <- initV hsc_env guts info (vectModule guts)
52 endPass dflags "Vectorisation" Opt_D_dump_vect (mg_binds guts')
53 return (zeroSimplCount dflags, guts' { mg_vect_info = info' })
55 dflags = hsc_dflags hsc_env
57 vectModule :: ModGuts -> VM ModGuts
60 binds' <- mapM vectTopBind (mg_binds guts)
61 return $ guts { mg_binds = binds' }
63 vectTopBind :: CoreBind -> VM CoreBind
64 vectTopBind b@(NonRec var expr)
66 var' <- vectTopBinder var
67 expr' <- vectTopRhs expr
69 return . Rec $ (var, expr) : (var', expr') : hs
73 vectTopBind b@(Rec bs)
75 vars' <- mapM vectTopBinder vars
76 exprs' <- mapM vectTopRhs exprs
78 return . Rec $ bs ++ zip vars' exprs' ++ hs
82 (vars, exprs) = unzip bs
84 vectTopBinder :: Var -> VM Var
87 vty <- vectType (idType var)
88 name <- cloneName mkVectOcc (getName var)
89 let var' | isExportedId var = Id.mkExportedLocalId name vty
90 | otherwise = Id.mkLocalId name vty
94 vectTopRhs :: CoreExpr -> VM CoreExpr
95 vectTopRhs = liftM fst . closedV . vectPolyExpr (panic "Empty lifting context") . freeVars
97 -- ----------------------------------------------------------------------------
100 vectBndr :: Var -> VM (Var, Var)
103 vty <- vectType (idType v)
104 lty <- mkPArrayType vty
105 let vv = v `Id.setIdType` vty
106 lv = v `Id.setIdType` lty
107 updLEnv (mapTo vv lv)
110 mapTo vv lv env = env { local_vars = extendVarEnv (local_vars env) v (Var vv, Var lv) }
112 vectBndrIn :: Var -> VM a -> VM (Var, Var, a)
116 (vv, lv) <- vectBndr v
120 vectBndrsIn :: [Var] -> VM a -> VM ([Var], [Var], a)
124 (vvs, lvs) <- mapAndUnzipM vectBndr vs
128 -- ----------------------------------------------------------------------------
131 replicateP :: CoreExpr -> CoreExpr -> VM CoreExpr
134 dict <- paDictOfType ty
135 rep <- builtin replicatePAVar
136 return $ mkApps (Var rep) [Type ty, dict, expr, len]
140 capply :: (CoreExpr, CoreExpr) -> (CoreExpr, CoreExpr) -> VM (CoreExpr, CoreExpr)
141 capply (vfn, lfn) (varg, larg)
143 apply <- builtin applyClosureVar
144 applyP <- builtin applyClosurePVar
145 return (mkApps (Var apply) [Type arg_ty, Type res_ty, vfn, varg],
146 mkApps (Var applyP) [Type arg_ty, Type res_ty, lfn, larg])
149 (arg_ty, res_ty) = splitClosureTy fn_ty
151 vectVar :: CoreExpr -> Var -> VM (CoreExpr, CoreExpr)
156 Local es -> return es
158 lexpr <- replicateP vexpr lc
159 return (vexpr, lexpr)
161 vectPolyVar :: CoreExpr -> Var -> [Type] -> VM (CoreExpr, CoreExpr)
166 Local (vexpr, lexpr) -> liftM2 (,) (mk_app vexpr) (mk_app lexpr)
169 lexpr <- replicateP vexpr lc
170 return (vexpr, lexpr)
172 mk_app e = applyToTypes e =<< mapM vectType tys
174 abstractOverTyVars :: [TyVar] -> ((CoreExpr -> CoreExpr) -> VM a) -> VM a
175 abstractOverTyVars tvs p
177 mdicts <- mapM mk_dict_var tvs
178 zipWithM_ (\tv -> maybe (deleteTyVarPA tv) (extendTyVarPA tv . Var)) tvs mdicts
182 r <- paDictArgType tv
184 Just ty -> liftM Just (newLocalVar FSLIT("dPA") ty)
185 Nothing -> return Nothing
187 mk_lams mdicts = mkLams [arg | (tv, mdict) <- zip tvs mdicts
188 , arg <- tv : maybeToList mdict]
190 applyToTypes :: CoreExpr -> [Type] -> VM CoreExpr
191 applyToTypes expr tys
193 dicts <- mapM paDictOfType tys
194 return $ mkApps expr [arg | (ty, dict) <- zip tys dicts
195 , arg <- [Type ty, dict]]
198 vectPolyExpr :: CoreExpr -> CoreExprWithFVs -> VM (CoreExpr, CoreExpr)
201 . abstractOverTyVars tvs $ \mk_lams ->
202 -- FIXME: shadowing (tvs in lc)
204 (vmono, lmono) <- vectExpr lc mono
205 return $ (mk_lams vmono, mk_lams lmono)
207 (tvs, mono) = collectAnnTypeBinders expr
209 vectExpr :: CoreExpr -> CoreExprWithFVs -> VM (CoreExpr, CoreExpr)
210 vectExpr lc (_, AnnType ty)
213 return (Type vty, Type vty)
215 vectExpr lc (_, AnnVar v) = vectVar lc v
217 vectExpr lc (_, AnnLit lit)
220 lexpr <- replicateP vexpr lc
221 return (vexpr, lexpr)
223 vectExpr lc (_, AnnNote note expr)
225 (vexpr, lexpr) <- vectExpr lc expr
226 return (Note note vexpr, Note note lexpr)
228 vectExpr lc e@(_, AnnApp _ arg)
230 = vectTyAppExpr lc fn tys
232 (fn, tys) = collectAnnTypeArgs e
234 vectExpr lc (_, AnnApp fn arg)
236 fn' <- vectExpr lc fn
237 arg' <- vectExpr lc arg
240 vectExpr lc (_, AnnCase expr bndr ty alts)
241 = panic "vectExpr: case"
243 vectExpr lc (_, AnnLet (AnnNonRec bndr rhs) body)
245 (vrhs, lrhs) <- vectPolyExpr lc rhs
246 (vbndr, lbndr, (vbody, lbody)) <- vectBndrIn bndr (vectExpr lc body)
247 return (Let (NonRec vbndr vrhs) vbody,
248 Let (NonRec lbndr lrhs) lbody)
250 vectExpr lc (_, AnnLet (AnnRec prs) body)
252 (vbndrs, lbndrs, (vrhss, vbody, lrhss, lbody)) <- vectBndrsIn bndrs vect
253 return (Let (Rec (zip vbndrs vrhss)) vbody,
254 Let (Rec (zip lbndrs lrhss)) lbody)
256 (bndrs, rhss) = unzip prs
259 (vrhss, lrhss) <- mapAndUnzipM (vectExpr lc) rhss
260 (vbody, lbody) <- vectPolyExpr lc body
261 return (vrhss, vbody, lrhss, lbody)
263 vectExpr lc e@(_, AnnLam bndr body)
264 | isTyVar bndr = pprPanic "vectExpr" (ppr $ deAnnotate e)
266 vectExpr lc (fvs, AnnLam bndr body)
268 let tyvars = filter isTyVar (varSetElems fvs)
269 info <- mkCEnvInfo fvs bndr body
270 (poly_vfn, poly_lfn) <- mkClosureFns info tyvars bndr body
272 vfn_var <- hoistExpr FSLIT("vfn") poly_vfn
273 lfn_var <- hoistExpr FSLIT("lfn") poly_lfn
275 let (venv, lenv) = mkClosureEnvs info lc
277 let env_ty = cenv_vty info
279 pa_dict <- paDictOfType env_ty
281 arg_ty <- vectType (varType bndr)
282 res_ty <- vectType (exprType $ deAnnotate body)
284 -- FIXME: move the functions to the top level
285 mono_vfn <- applyToTypes (Var vfn_var) (map TyVarTy tyvars)
286 mono_lfn <- applyToTypes (Var lfn_var) (map TyVarTy tyvars)
288 mk_clo <- builtin mkClosureVar
289 mk_cloP <- builtin mkClosurePVar
291 let vclo = Var mk_clo `mkTyApps` [arg_ty, res_ty, env_ty]
292 `mkApps` [pa_dict, mono_vfn, mono_lfn, venv]
294 lclo = Var mk_cloP `mkTyApps` [arg_ty, res_ty, env_ty]
295 `mkApps` [pa_dict, mono_vfn, mono_lfn, lenv]
300 data CEnvInfo = CEnvInfo {
302 , cenv_values :: [(CoreExpr, CoreExpr)]
305 , cenv_repr_tycon :: TyCon
306 , cenv_repr_tyargs :: [Type]
307 , cenv_repr_datacon :: DataCon
310 mkCEnvInfo :: VarSet -> Var -> CoreExprWithFVs -> VM CEnvInfo
311 mkCEnvInfo fvs arg body
313 locals <- readLEnv local_vars
316 [(var, val) | var <- varSetElems fvs
317 , Just val <- [lookupVarEnv locals var]]
318 vtys <- mapM (vectType . varType) vars
320 (vty, repr_tycon, repr_tyargs, repr_datacon) <- mk_env_ty vtys
321 lty <- mkPArrayType vty
328 , cenv_repr_tycon = repr_tycon
329 , cenv_repr_tyargs = repr_tyargs
330 , cenv_repr_datacon = repr_datacon
334 = return (vty, error "absent cinfo_repr_tycon"
335 , error "absent cinfo_repr_tyargs"
336 , error "absent cinfo_repr_datacon")
340 let ty = mkCoreTupTy vtys
341 (repr_tc, repr_tyargs) <- lookupPArrayFamInst ty
342 let [repr_con] = tyConDataCons repr_tc
343 return (ty, repr_tc, repr_tyargs, repr_con)
347 mkClosureEnvs :: CEnvInfo -> CoreExpr -> (CoreExpr, CoreExpr)
348 mkClosureEnvs info lc
350 = (Var unitDataConId, mkApps (Var $ dataConWrapId (cenv_repr_datacon info))
351 [lc, Var unitDataConId])
353 | [(vval, lval)] <- vals
357 = (mkCoreTup vvals, Var (dataConWrapId $ cenv_repr_datacon info)
358 `mkTyApps` cenv_repr_tyargs info
359 `mkApps` (lc : lvals))
362 vals = cenv_values info
363 (vvals, lvals) = unzip vals
365 mkClosureFns :: CEnvInfo -> [TyVar] -> Var -> CoreExprWithFVs
366 -> VM (CoreExpr, CoreExpr)
367 mkClosureFns info tyvars arg body
369 . abstractOverTyVars tyvars
372 (vfn, lfn) <- mkClosureMonoFns info arg body
373 return (mk_tlams vfn, mk_tlams lfn)
375 mkClosureMonoFns :: CEnvInfo -> Var -> CoreExprWithFVs -> VM (CoreExpr, CoreExpr)
376 mkClosureMonoFns info arg body
378 lc_bndr <- newLocalVar FSLIT("lc") intPrimTy
379 (varg : vbndrs, larg : lbndrs, (vbody, lbody))
380 <- vectBndrsIn (arg : cenv_vars info)
381 (vectExpr (Var lc_bndr) body)
383 venv_bndr <- newLocalVar FSLIT("env") vty
384 lenv_bndr <- newLocalVar FSLIT("env") lty
386 let vcase = bind_venv (Var venv_bndr) vbody vbndrs
387 lcase <- bind_lenv (Var lenv_bndr) lbody lc_bndr lbndrs
388 return (mkLams [venv_bndr, varg] vcase, mkLams [lenv_bndr, larg] lcase)
393 arity = length (cenv_vars info)
395 bind_venv venv vbody [] = vbody
396 bind_venv venv vbody [vbndr] = Let (NonRec vbndr venv) vbody
397 bind_venv venv vbody vbndrs
398 = Case venv (mkWildId vty) (exprType vbody)
399 [(DataAlt (tupleCon Boxed arity), vbndrs, vbody)]
401 bind_lenv lenv lbody lc_bndr [lbndr]
403 lengthPA <- builtin lengthPAVar
404 return . Let (NonRec lbndr lenv)
405 $ Case (mkApps (Var lengthPA) [Type vty, (Var lbndr)])
408 [(DEFAULT, [], lbody)]
410 bind_lenv lenv lbody lc_bndr lbndrs
411 = let scrut = unwrapFamInstScrut (cenv_repr_tycon info)
412 (cenv_repr_tyargs info)
414 lbndrs' | null lbndrs = [mkWildId unitTy]
419 (mkWildId (exprType scrut))
421 [(DataAlt (cenv_repr_datacon info), lc_bndr : lbndrs', lbody)]
423 vectTyAppExpr :: CoreExpr -> CoreExprWithFVs -> [Type] -> VM (CoreExpr, CoreExpr)
424 vectTyAppExpr lc (_, AnnVar v) tys = vectPolyVar lc v tys
425 vectTyAppExpr lc e tys = pprPanic "vectTyAppExpr" (ppr $ deAnnotate e)
427 -- ----------------------------------------------------------------------------
430 vectTyCon :: TyCon -> VM TyCon
432 | isFunTyCon tc = builtin closureTyCon
433 | isBoxedTupleTyCon tc = return tc
434 | isUnLiftedTyCon tc = return tc
438 Just tc' -> return tc'
440 -- FIXME: just for now
441 Nothing -> pprTrace "ccTyCon:" (ppr tc) $ return tc
443 vectType :: Type -> VM Type
444 vectType ty | Just ty' <- coreView ty = vectType ty'
445 vectType (TyVarTy tv) = return $ TyVarTy tv
446 vectType (AppTy ty1 ty2) = liftM2 AppTy (vectType ty1) (vectType ty2)
447 vectType (TyConApp tc tys) = liftM2 TyConApp (vectTyCon tc) (mapM vectType tys)
448 vectType (FunTy ty1 ty2) = liftM2 TyConApp (builtin closureTyCon)
449 (mapM vectType [ty1,ty2])
450 vectType (ForAllTy tv ty)
452 r <- paDictArgType tv
454 return $ ForAllTy tv (wrap r ty')
457 wrap (Just pa_ty) = FunTy pa_ty
459 vectType ty = pprPanic "vectType:" (ppr ty)