1 module Vectorise( vectorise )
4 #include "HsVersions.h"
12 import CoreLint ( showPass, endPass )
23 import Name ( mkSysTvName )
26 import MkId ( unwrapFamInstScrut )
28 import DsMonad hiding (mapAndUnzipM)
29 import DsUtils ( mkCoreTup, mkCoreTupTy )
33 import BasicTypes ( Boxity(..) )
37 import Control.Monad ( liftM, liftM2, mapAndUnzipM, zipWithM_ )
38 import Data.Maybe ( maybeToList )
40 vectorise :: HscEnv -> ModGuts -> IO ModGuts
41 vectorise hsc_env guts
42 | not (Opt_Vectorise `dopt` dflags) = return guts
45 showPass dflags "Vectorisation"
47 let info = hptVectInfo hsc_env `plusVectInfo` eps_vect_info eps
48 Just (info', guts') <- initV hsc_env guts info (vectModule guts)
49 endPass dflags "Vectorisation" Opt_D_dump_vect (mg_binds guts')
50 return $ guts' { mg_vect_info = info' }
52 dflags = hsc_dflags hsc_env
54 vectModule :: ModGuts -> VM ModGuts
55 vectModule guts = return guts
57 -- ----------------------------------------------------------------------------
60 vectBndr :: Var -> VM (Var, Var)
63 vty <- vectType (idType v)
64 lty <- mkPArrayType vty
65 let vv = v `Id.setIdType` vty
66 lv = v `Id.setIdType` lty
70 mapTo vv lv env = env { local_vars = extendVarEnv (local_vars env) v (Var vv, Var lv) }
72 vectBndrIn :: Var -> VM a -> VM (Var, Var, a)
76 (vv, lv) <- vectBndr v
80 vectBndrsIn :: [Var] -> VM a -> VM ([Var], [Var], a)
84 (vvs, lvs) <- mapAndUnzipM vectBndr vs
88 -- ----------------------------------------------------------------------------
91 replicateP :: CoreExpr -> CoreExpr -> VM CoreExpr
94 dict <- paDictOfType ty
95 rep <- builtin replicatePAVar
96 return $ mkApps (Var rep) [Type ty, dict, expr, len]
100 capply :: (CoreExpr, CoreExpr) -> (CoreExpr, CoreExpr) -> VM (CoreExpr, CoreExpr)
101 capply (vfn, lfn) (varg, larg)
103 apply <- builtin applyClosureVar
104 applyP <- builtin applyClosurePVar
105 return (mkApps (Var apply) [Type arg_ty, Type res_ty, vfn, varg],
106 mkApps (Var applyP) [Type arg_ty, Type res_ty, lfn, larg])
109 (arg_ty, res_ty) = splitClosureTy fn_ty
111 vectVar :: CoreExpr -> Var -> VM (CoreExpr, CoreExpr)
112 vectVar lc v = local v `orElseV` global v
114 local v = maybeV (readLEnv $ \env -> lookupVarEnv (local_vars env) v)
116 vexpr <- maybeV (readGEnv $ \env -> lookupVarEnv (global_vars env) v)
117 lexpr <- replicateP vexpr lc
118 return (vexpr, lexpr)
120 vectPolyVar :: CoreExpr -> Var -> [Type] -> VM (CoreExpr, CoreExpr)
123 r <- readLEnv $ \env -> lookupVarEnv (local_vars env) v
125 Just (vexpr, lexpr) -> liftM2 (,) (mk_app vexpr) (mk_app lexpr)
128 poly <- maybeV (readGEnv $ \env -> lookupVarEnv (global_vars env) v)
130 lexpr <- replicateP vexpr lc
131 return (vexpr, lexpr)
133 mk_app e = applyToTypes e =<< mapM vectType tys
135 abstractOverTyVars :: [TyVar] -> ((CoreExpr -> CoreExpr) -> VM a) -> VM a
136 abstractOverTyVars tvs p
138 mdicts <- mapM mk_dict_var tvs
139 zipWithM_ (\tv -> maybe (deleteTyVarPA tv) (extendTyVarPA tv . Var)) tvs mdicts
143 r <- paDictArgType tv
145 Just ty -> liftM Just (newLocalVar FSLIT("dPA") ty)
146 Nothing -> return Nothing
148 mk_lams mdicts = mkLams [arg | (tv, mdict) <- zip tvs mdicts
149 , arg <- tv : maybeToList mdict]
151 applyToTypes :: CoreExpr -> [Type] -> VM CoreExpr
152 applyToTypes expr tys
154 dicts <- mapM paDictOfType tys
155 return $ mkApps expr [arg | (ty, dict) <- zip tys dicts
156 , arg <- [Type ty, dict]]
159 vectPolyExpr :: CoreExpr -> CoreExprWithFVs -> VM (CoreExpr, CoreExpr)
162 . abstractOverTyVars tvs $ \mk_lams ->
163 -- FIXME: shadowing (tvs in lc)
165 (vmono, lmono) <- vectExpr lc mono
166 return $ (mk_lams vmono, mk_lams lmono)
168 (tvs, mono) = collectAnnTypeBinders expr
170 vectExpr :: CoreExpr -> CoreExprWithFVs -> VM (CoreExpr, CoreExpr)
171 vectExpr lc (_, AnnType ty)
174 return (Type vty, Type vty)
176 vectExpr lc (_, AnnVar v) = vectVar lc v
178 vectExpr lc (_, AnnLit lit)
181 lexpr <- replicateP vexpr lc
182 return (vexpr, lexpr)
184 vectExpr lc (_, AnnNote note expr)
186 (vexpr, lexpr) <- vectExpr lc expr
187 return (Note note vexpr, Note note lexpr)
189 vectExpr lc e@(_, AnnApp _ arg)
191 = vectTyAppExpr lc fn tys
193 (fn, tys) = collectAnnTypeArgs e
195 vectExpr lc (_, AnnApp fn arg)
197 fn' <- vectExpr lc fn
198 arg' <- vectExpr lc arg
201 vectExpr lc (_, AnnCase expr bndr ty alts)
202 = panic "vectExpr: case"
204 vectExpr lc (_, AnnLet (AnnNonRec bndr rhs) body)
206 (vrhs, lrhs) <- vectPolyExpr lc rhs
207 (vbndr, lbndr, (vbody, lbody)) <- vectBndrIn bndr (vectExpr lc body)
208 return (Let (NonRec vbndr vrhs) vbody,
209 Let (NonRec lbndr lrhs) lbody)
211 vectExpr lc (_, AnnLet (AnnRec prs) body)
213 (vbndrs, lbndrs, (vrhss, vbody, lrhss, lbody)) <- vectBndrsIn bndrs vect
214 return (Let (Rec (zip vbndrs vrhss)) vbody,
215 Let (Rec (zip lbndrs lrhss)) lbody)
217 (bndrs, rhss) = unzip prs
220 (vrhss, lrhss) <- mapAndUnzipM (vectExpr lc) rhss
221 (vbody, lbody) <- vectPolyExpr lc body
222 return (vrhss, vbody, lrhss, lbody)
224 vectExpr lc e@(_, AnnLam bndr body)
225 | isTyVar bndr = pprPanic "vectExpr" (ppr $ deAnnotate e)
227 vectExpr lc (fvs, AnnLam bndr body)
229 let tyvars = filter isTyVar (varSetElems fvs)
230 info <- mkCEnvInfo fvs bndr body
231 (poly_vfn, poly_lfn) <- mkClosureFns info tyvars bndr body
233 vfn_var <- hoistExpr FSLIT("vfn") poly_vfn
234 lfn_var <- hoistExpr FSLIT("lfn") poly_lfn
236 let (venv, lenv) = mkClosureEnvs info lc
238 let env_ty = cenv_vty info
240 pa_dict <- paDictOfType env_ty
242 arg_ty <- vectType (varType bndr)
243 res_ty <- vectType (exprType $ deAnnotate body)
245 -- FIXME: move the functions to the top level
246 mono_vfn <- applyToTypes (Var vfn_var) (map TyVarTy tyvars)
247 mono_lfn <- applyToTypes (Var lfn_var) (map TyVarTy tyvars)
249 mk_clo <- builtin mkClosureVar
250 mk_cloP <- builtin mkClosurePVar
252 let vclo = Var mk_clo `mkTyApps` [arg_ty, res_ty, env_ty]
253 `mkApps` [pa_dict, mono_vfn, mono_lfn, venv]
255 lclo = Var mk_cloP `mkTyApps` [arg_ty, res_ty, env_ty]
256 `mkApps` [pa_dict, mono_vfn, mono_lfn, lenv]
261 data CEnvInfo = CEnvInfo {
263 , cenv_values :: [(CoreExpr, CoreExpr)]
266 , cenv_repr_tycon :: TyCon
267 , cenv_repr_tyargs :: [Type]
268 , cenv_repr_datacon :: DataCon
271 mkCEnvInfo :: VarSet -> Var -> CoreExprWithFVs -> VM CEnvInfo
272 mkCEnvInfo fvs arg body
274 locals <- readLEnv local_vars
277 [(var, val) | var <- varSetElems fvs
278 , Just val <- [lookupVarEnv locals var]]
279 vtys <- mapM (vectType . varType) vars
281 (vty, repr_tycon, repr_tyargs, repr_datacon) <- mk_env_ty vtys
282 lty <- mkPArrayType vty
289 , cenv_repr_tycon = repr_tycon
290 , cenv_repr_tyargs = repr_tyargs
291 , cenv_repr_datacon = repr_datacon
295 = return (vty, error "absent cinfo_repr_tycon"
296 , error "absent cinfo_repr_tyargs"
297 , error "absent cinfo_repr_datacon")
301 let ty = mkCoreTupTy vtys
302 (repr_tc, repr_tyargs) <- lookupPArrayFamInst ty
303 let [repr_con] = tyConDataCons repr_tc
304 return (ty, repr_tc, repr_tyargs, repr_con)
308 mkClosureEnvs :: CEnvInfo -> CoreExpr -> (CoreExpr, CoreExpr)
309 mkClosureEnvs info lc
311 = (Var unitDataConId, mkApps (Var $ dataConWrapId (cenv_repr_datacon info))
312 [lc, Var unitDataConId])
314 | [(vval, lval)] <- vals
318 = (mkCoreTup vvals, Var (dataConWrapId $ cenv_repr_datacon info)
319 `mkTyApps` cenv_repr_tyargs info
320 `mkApps` (lc : lvals))
323 vals = cenv_values info
324 (vvals, lvals) = unzip vals
326 mkClosureFns :: CEnvInfo -> [TyVar] -> Var -> CoreExprWithFVs
327 -> VM (CoreExpr, CoreExpr)
328 mkClosureFns info tyvars arg body
330 . abstractOverTyVars tyvars
333 (vfn, lfn) <- mkClosureMonoFns info arg body
334 return (mk_tlams vfn, mk_tlams lfn)
336 mkClosureMonoFns :: CEnvInfo -> Var -> CoreExprWithFVs -> VM (CoreExpr, CoreExpr)
337 mkClosureMonoFns info arg body
339 lc_bndr <- newLocalVar FSLIT("lc") intTy
340 (varg : vbndrs, larg : lbndrs, (vbody, lbody))
341 <- vectBndrsIn (arg : cenv_vars info)
342 (vectExpr (Var lc_bndr) body)
344 venv_bndr <- newLocalVar FSLIT("env") vty
345 lenv_bndr <- newLocalVar FSLIT("env") lty
347 let vcase = bind_venv (Var venv_bndr) vbody vbndrs
348 lcase <- bind_lenv (Var lenv_bndr) lbody lc_bndr lbndrs
349 return (mkLams [venv_bndr, varg] vcase, mkLams [lenv_bndr, larg] lcase)
354 arity = length (cenv_vars info)
356 bind_venv venv vbody [] = vbody
357 bind_venv venv vbody [vbndr] = Let (NonRec vbndr venv) vbody
358 bind_venv venv vbody vbndrs
359 = Case venv (mkWildId vty) (exprType vbody)
360 [(DataAlt (tupleCon Boxed arity), vbndrs, vbody)]
362 bind_lenv lenv lbody lc_bndr [lbndr]
364 lengthPA <- builtin lengthPAVar
365 return . Let (NonRec lbndr lenv)
366 $ Case (mkApps (Var lengthPA) [Type vty, (Var lbndr)])
369 [(DEFAULT, [], lbody)]
371 bind_lenv lenv lbody lc_bndr lbndrs
373 $ Case (unwrapFamInstScrut (cenv_repr_tycon info)
374 (cenv_repr_tyargs info)
378 [(DataAlt (cenv_repr_datacon info), lc_bndr : lbndrs, lbody)]
380 vectTyAppExpr :: CoreExpr -> CoreExprWithFVs -> [Type] -> VM (CoreExpr, CoreExpr)
381 vectTyAppExpr lc (_, AnnVar v) tys = vectPolyVar lc v tys
382 vectTyAppExpr lc e tys = pprPanic "vectTyAppExpr" (ppr $ deAnnotate e)
384 -- ----------------------------------------------------------------------------
387 vectTyCon :: TyCon -> VM TyCon
389 | isFunTyCon tc = builtin closureTyCon
390 | isBoxedTupleTyCon tc = return tc
391 | isUnLiftedTyCon tc = return tc
395 Just tc' -> return tc'
397 -- FIXME: just for now
398 Nothing -> pprTrace "ccTyCon:" (ppr tc) $ return tc
400 vectType :: Type -> VM Type
401 vectType ty | Just ty' <- coreView ty = vectType ty
402 vectType (TyVarTy tv) = return $ TyVarTy tv
403 vectType (AppTy ty1 ty2) = liftM2 AppTy (vectType ty1) (vectType ty2)
404 vectType (TyConApp tc tys) = liftM2 TyConApp (vectTyCon tc) (mapM vectType tys)
405 vectType (FunTy ty1 ty2) = liftM2 TyConApp (builtin closureTyCon)
406 (mapM vectType [ty1,ty2])
407 vectType (ForAllTy tv ty)
409 r <- paDictArgType tv
411 return $ ForAllTy tv (wrap r ty')
414 wrap (Just pa_ty) = FunTy pa_ty
416 vectType ty = pprPanic "vectType:" (ppr ty)