1 module Vectorise( vectorise )
4 #include "HsVersions.h"
13 import CoreLint ( showPass, endPass )
17 import SimplMonad ( SimplCount, zeroSimplCount )
18 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_ )
43 vectorise :: HscEnv -> UniqSupply -> RuleBase -> ModGuts
44 -> IO (SimplCount, ModGuts)
45 vectorise hsc_env _ _ guts
47 showPass dflags "Vectorisation"
49 let info = hptVectInfo hsc_env `plusVectInfo` eps_vect_info eps
50 Just (info', guts') <- initV hsc_env guts info (vectModule guts)
51 endPass dflags "Vectorisation" Opt_D_dump_vect (mg_binds guts')
52 return (zeroSimplCount dflags, guts' { mg_vect_info = info' })
54 dflags = hsc_dflags hsc_env
56 vectModule :: ModGuts -> VM ModGuts
59 types' <- vectTypeEnv (mg_types guts)
60 binds' <- mapM vectTopBind (mg_binds guts)
61 return $ guts { mg_types = types'
64 vectTopBind :: CoreBind -> VM CoreBind
65 vectTopBind b@(NonRec var expr)
67 var' <- vectTopBinder var
68 expr' <- vectTopRhs expr
70 return . Rec $ (var, expr) : (var', expr') : hs
74 vectTopBind b@(Rec bs)
76 vars' <- mapM vectTopBinder vars
77 exprs' <- mapM vectTopRhs exprs
79 return . Rec $ bs ++ zip vars' exprs' ++ hs
83 (vars, exprs) = unzip bs
85 vectTopBinder :: Var -> VM Var
88 vty <- vectType (idType var)
89 name <- cloneName mkVectOcc (getName var)
90 let var' | isExportedId var = Id.mkExportedLocalId name vty
91 | otherwise = Id.mkLocalId name vty
95 vectTopRhs :: CoreExpr -> VM CoreExpr
96 vectTopRhs = liftM fst . closedV . vectPolyExpr (panic "Empty lifting context") . freeVars
98 -- ----------------------------------------------------------------------------
101 vectBndr :: Var -> VM (Var, Var)
104 vty <- vectType (idType v)
105 lty <- mkPArrayType vty
106 let vv = v `Id.setIdType` vty
107 lv = v `Id.setIdType` lty
108 updLEnv (mapTo vv lv)
111 mapTo vv lv env = env { local_vars = extendVarEnv (local_vars env) v (Var vv, Var lv) }
113 vectBndrIn :: Var -> VM a -> VM (Var, Var, a)
117 (vv, lv) <- vectBndr v
121 vectBndrsIn :: [Var] -> VM a -> VM ([Var], [Var], a)
125 (vvs, lvs) <- mapAndUnzipM vectBndr vs
129 -- ----------------------------------------------------------------------------
132 replicateP :: CoreExpr -> CoreExpr -> VM CoreExpr
135 dict <- paDictOfType ty
136 rep <- builtin replicatePAVar
137 return $ mkApps (Var rep) [Type ty, dict, expr, len]
141 capply :: (CoreExpr, CoreExpr) -> (CoreExpr, CoreExpr) -> VM (CoreExpr, CoreExpr)
142 capply (vfn, lfn) (varg, larg)
144 apply <- builtin applyClosureVar
145 applyP <- builtin applyClosurePVar
146 return (mkApps (Var apply) [Type arg_ty, Type res_ty, vfn, varg],
147 mkApps (Var applyP) [Type arg_ty, Type res_ty, lfn, larg])
150 (arg_ty, res_ty) = splitClosureTy fn_ty
152 vectVar :: CoreExpr -> Var -> VM (CoreExpr, CoreExpr)
157 Local es -> return es
159 lexpr <- replicateP vexpr lc
160 return (vexpr, lexpr)
162 vectPolyVar :: CoreExpr -> Var -> [Type] -> VM (CoreExpr, CoreExpr)
167 Local (vexpr, lexpr) -> liftM2 (,) (mk_app vexpr) (mk_app lexpr)
170 lexpr <- replicateP vexpr lc
171 return (vexpr, lexpr)
173 mk_app e = applyToTypes e =<< mapM vectType tys
175 abstractOverTyVars :: [TyVar] -> ((CoreExpr -> CoreExpr) -> VM a) -> VM a
176 abstractOverTyVars tvs p
178 mdicts <- mapM mk_dict_var tvs
179 zipWithM_ (\tv -> maybe (defLocalTyVar tv) (defLocalTyVarWithPA tv . Var)) tvs mdicts
183 r <- paDictArgType tv
185 Just ty -> liftM Just (newLocalVar FSLIT("dPA") ty)
186 Nothing -> return Nothing
188 mk_lams mdicts = mkLams (tvs ++ [dict | Just dict <- mdicts])
190 applyToTypes :: CoreExpr -> [Type] -> VM CoreExpr
191 applyToTypes expr tys
193 dicts <- mapM paDictOfType tys
194 return $ expr `mkTyApps` tys `mkApps` dicts
196 vectPolyExpr :: CoreExpr -> CoreExprWithFVs -> VM (CoreExpr, CoreExpr)
199 . abstractOverTyVars tvs $ \mk_lams ->
200 -- FIXME: shadowing (tvs in lc)
202 (vmono, lmono) <- vectExpr lc mono
203 return $ (mk_lams vmono, mk_lams lmono)
205 (tvs, mono) = collectAnnTypeBinders expr
207 vectExpr :: CoreExpr -> CoreExprWithFVs -> VM (CoreExpr, CoreExpr)
208 vectExpr lc (_, AnnType ty)
211 return (Type vty, Type vty)
213 vectExpr lc (_, AnnVar v) = vectVar lc v
215 vectExpr lc (_, AnnLit lit)
218 lexpr <- replicateP vexpr lc
219 return (vexpr, lexpr)
221 vectExpr lc (_, AnnNote note expr)
223 (vexpr, lexpr) <- vectExpr lc expr
224 return (Note note vexpr, Note note lexpr)
226 vectExpr lc e@(_, AnnApp _ arg)
228 = vectTyAppExpr lc fn tys
230 (fn, tys) = collectAnnTypeArgs e
232 vectExpr lc (_, AnnApp fn arg)
234 fn' <- vectExpr lc fn
235 arg' <- vectExpr lc arg
238 vectExpr lc (_, AnnCase expr bndr ty alts)
239 = panic "vectExpr: case"
241 vectExpr lc (_, AnnLet (AnnNonRec bndr rhs) body)
243 (vrhs, lrhs) <- vectPolyExpr lc rhs
244 (vbndr, lbndr, (vbody, lbody)) <- vectBndrIn bndr (vectExpr lc body)
245 return (Let (NonRec vbndr vrhs) vbody,
246 Let (NonRec lbndr lrhs) lbody)
248 vectExpr lc (_, AnnLet (AnnRec prs) body)
250 (vbndrs, lbndrs, (vrhss, vbody, lrhss, lbody)) <- vectBndrsIn bndrs vect
251 return (Let (Rec (zip vbndrs vrhss)) vbody,
252 Let (Rec (zip lbndrs lrhss)) lbody)
254 (bndrs, rhss) = unzip prs
257 (vrhss, lrhss) <- mapAndUnzipM (vectExpr lc) rhss
258 (vbody, lbody) <- vectPolyExpr lc body
259 return (vrhss, vbody, lrhss, lbody)
261 vectExpr lc e@(_, AnnLam bndr body)
262 | isTyVar bndr = pprPanic "vectExpr" (ppr $ deAnnotate e)
264 vectExpr lc (fvs, AnnLam bndr body)
266 tyvars <- localTyVars
267 info <- mkCEnvInfo fvs bndr body
268 (poly_vfn, poly_lfn) <- mkClosureFns info tyvars bndr body
270 vfn_var <- hoistExpr FSLIT("vfn") poly_vfn
271 lfn_var <- hoistExpr FSLIT("lfn") poly_lfn
273 let (venv, lenv) = mkClosureEnvs info lc
275 let env_ty = cenv_vty info
277 pa_dict <- paDictOfType env_ty
279 arg_ty <- vectType (varType bndr)
280 res_ty <- vectType (exprType $ deAnnotate body)
282 -- FIXME: move the functions to the top level
283 mono_vfn <- applyToTypes (Var vfn_var) (mkTyVarTys tyvars)
284 mono_lfn <- applyToTypes (Var lfn_var) (mkTyVarTys tyvars)
286 mk_clo <- builtin mkClosureVar
287 mk_cloP <- builtin mkClosurePVar
289 let vclo = Var mk_clo `mkTyApps` [arg_ty, res_ty, env_ty]
290 `mkApps` [pa_dict, mono_vfn, mono_lfn, venv]
292 lclo = Var mk_cloP `mkTyApps` [arg_ty, res_ty, env_ty]
293 `mkApps` [pa_dict, mono_vfn, mono_lfn, lenv]
298 data CEnvInfo = CEnvInfo {
300 , cenv_values :: [(CoreExpr, CoreExpr)]
303 , cenv_repr_tycon :: TyCon
304 , cenv_repr_tyargs :: [Type]
305 , cenv_repr_datacon :: DataCon
308 mkCEnvInfo :: VarSet -> Var -> CoreExprWithFVs -> VM CEnvInfo
309 mkCEnvInfo fvs arg body
311 locals <- readLEnv local_vars
314 [(var, val) | var <- varSetElems fvs
315 , Just val <- [lookupVarEnv locals var]]
316 vtys <- mapM (vectType . varType) vars
318 (vty, repr_tycon, repr_tyargs, repr_datacon) <- mk_env_ty vtys
319 lty <- mkPArrayType vty
326 , cenv_repr_tycon = repr_tycon
327 , cenv_repr_tyargs = repr_tyargs
328 , cenv_repr_datacon = repr_datacon
332 = return (vty, error "absent cinfo_repr_tycon"
333 , error "absent cinfo_repr_tyargs"
334 , error "absent cinfo_repr_datacon")
338 let ty = mkCoreTupTy vtys
339 (repr_tc, repr_tyargs) <- lookupPArrayFamInst ty
340 let [repr_con] = tyConDataCons repr_tc
341 return (ty, repr_tc, repr_tyargs, repr_con)
345 mkClosureEnvs :: CEnvInfo -> CoreExpr -> (CoreExpr, CoreExpr)
346 mkClosureEnvs info lc
348 = (Var unitDataConId, mkApps (Var $ dataConWrapId (cenv_repr_datacon info))
349 [lc, Var unitDataConId])
351 | [(vval, lval)] <- vals
355 = (mkCoreTup vvals, Var (dataConWrapId $ cenv_repr_datacon info)
356 `mkTyApps` cenv_repr_tyargs info
357 `mkApps` (lc : lvals))
360 vals = cenv_values info
361 (vvals, lvals) = unzip vals
363 mkClosureFns :: CEnvInfo -> [TyVar] -> Var -> CoreExprWithFVs
364 -> VM (CoreExpr, CoreExpr)
365 mkClosureFns info tyvars arg body
367 . abstractOverTyVars tyvars
370 (vfn, lfn) <- mkClosureMonoFns info arg body
371 return (mk_tlams vfn, mk_tlams lfn)
373 mkClosureMonoFns :: CEnvInfo -> Var -> CoreExprWithFVs -> VM (CoreExpr, CoreExpr)
374 mkClosureMonoFns info arg body
376 lc_bndr <- newLocalVar FSLIT("lc") intPrimTy
377 (varg : vbndrs, larg : lbndrs, (vbody, lbody))
378 <- vectBndrsIn (arg : cenv_vars info)
379 (vectExpr (Var lc_bndr) body)
381 venv_bndr <- newLocalVar FSLIT("env") vty
382 lenv_bndr <- newLocalVar FSLIT("env") lty
384 let vcase = bind_venv (Var venv_bndr) vbody vbndrs
385 lcase <- bind_lenv (Var lenv_bndr) lbody lc_bndr lbndrs
386 return (mkLams [venv_bndr, varg] vcase, mkLams [lenv_bndr, larg] lcase)
391 arity = length (cenv_vars info)
393 bind_venv venv vbody [] = vbody
394 bind_venv venv vbody [vbndr] = Let (NonRec vbndr venv) vbody
395 bind_venv venv vbody vbndrs
396 = Case venv (mkWildId vty) (exprType vbody)
397 [(DataAlt (tupleCon Boxed arity), vbndrs, vbody)]
399 bind_lenv lenv lbody lc_bndr [lbndr]
401 lengthPA <- builtin lengthPAVar
402 pa_dict <- paDictOfType vty
403 return . Let (NonRec lbndr lenv)
404 $ Case (mkApps (Var lengthPA) [Type vty, pa_dict, (Var lbndr)])
407 [(DEFAULT, [], lbody)]
409 bind_lenv lenv lbody lc_bndr lbndrs
410 = let scrut = unwrapFamInstScrut (cenv_repr_tycon info)
411 (cenv_repr_tyargs info)
413 lbndrs' | null lbndrs = [mkWildId unitTy]
418 (mkWildId (exprType scrut))
420 [(DataAlt (cenv_repr_datacon info), lc_bndr : lbndrs', lbody)]
422 vectTyAppExpr :: CoreExpr -> CoreExprWithFVs -> [Type] -> VM (CoreExpr, CoreExpr)
423 vectTyAppExpr lc (_, AnnVar v) tys = vectPolyVar lc v tys
424 vectTyAppExpr lc e tys = pprPanic "vectTyAppExpr" (ppr $ deAnnotate e)