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 (tvs ++ [dict | Just dict <- mdicts])
189 applyToTypes :: CoreExpr -> [Type] -> VM CoreExpr
190 applyToTypes expr tys
192 dicts <- mapM paDictOfType tys
193 return $ expr `mkTyApps` tys `mkApps` dicts
195 vectPolyExpr :: CoreExpr -> CoreExprWithFVs -> VM (CoreExpr, CoreExpr)
198 . abstractOverTyVars tvs $ \mk_lams ->
199 -- FIXME: shadowing (tvs in lc)
201 (vmono, lmono) <- vectExpr lc mono
202 return $ (mk_lams vmono, mk_lams lmono)
204 (tvs, mono) = collectAnnTypeBinders expr
206 vectExpr :: CoreExpr -> CoreExprWithFVs -> VM (CoreExpr, CoreExpr)
207 vectExpr lc (_, AnnType ty)
210 return (Type vty, Type vty)
212 vectExpr lc (_, AnnVar v) = vectVar lc v
214 vectExpr lc (_, AnnLit lit)
217 lexpr <- replicateP vexpr lc
218 return (vexpr, lexpr)
220 vectExpr lc (_, AnnNote note expr)
222 (vexpr, lexpr) <- vectExpr lc expr
223 return (Note note vexpr, Note note lexpr)
225 vectExpr lc e@(_, AnnApp _ arg)
227 = vectTyAppExpr lc fn tys
229 (fn, tys) = collectAnnTypeArgs e
231 vectExpr lc (_, AnnApp fn arg)
233 fn' <- vectExpr lc fn
234 arg' <- vectExpr lc arg
237 vectExpr lc (_, AnnCase expr bndr ty alts)
238 = panic "vectExpr: case"
240 vectExpr lc (_, AnnLet (AnnNonRec bndr rhs) body)
242 (vrhs, lrhs) <- vectPolyExpr lc rhs
243 (vbndr, lbndr, (vbody, lbody)) <- vectBndrIn bndr (vectExpr lc body)
244 return (Let (NonRec vbndr vrhs) vbody,
245 Let (NonRec lbndr lrhs) lbody)
247 vectExpr lc (_, AnnLet (AnnRec prs) body)
249 (vbndrs, lbndrs, (vrhss, vbody, lrhss, lbody)) <- vectBndrsIn bndrs vect
250 return (Let (Rec (zip vbndrs vrhss)) vbody,
251 Let (Rec (zip lbndrs lrhss)) lbody)
253 (bndrs, rhss) = unzip prs
256 (vrhss, lrhss) <- mapAndUnzipM (vectExpr lc) rhss
257 (vbody, lbody) <- vectPolyExpr lc body
258 return (vrhss, vbody, lrhss, lbody)
260 vectExpr lc e@(_, AnnLam bndr body)
261 | isTyVar bndr = pprPanic "vectExpr" (ppr $ deAnnotate e)
263 vectExpr lc (fvs, AnnLam bndr body)
265 let tyvars = filter isTyVar (varSetElems fvs)
266 info <- mkCEnvInfo fvs bndr body
267 (poly_vfn, poly_lfn) <- mkClosureFns info tyvars bndr body
269 vfn_var <- hoistExpr FSLIT("vfn") poly_vfn
270 lfn_var <- hoistExpr FSLIT("lfn") poly_lfn
272 let (venv, lenv) = mkClosureEnvs info lc
274 let env_ty = cenv_vty info
276 pa_dict <- paDictOfType env_ty
278 arg_ty <- vectType (varType bndr)
279 res_ty <- vectType (exprType $ deAnnotate body)
281 -- FIXME: move the functions to the top level
282 mono_vfn <- applyToTypes (Var vfn_var) (map TyVarTy tyvars)
283 mono_lfn <- applyToTypes (Var lfn_var) (map TyVarTy tyvars)
285 mk_clo <- builtin mkClosureVar
286 mk_cloP <- builtin mkClosurePVar
288 let vclo = Var mk_clo `mkTyApps` [arg_ty, res_ty, env_ty]
289 `mkApps` [pa_dict, mono_vfn, mono_lfn, venv]
291 lclo = Var mk_cloP `mkTyApps` [arg_ty, res_ty, env_ty]
292 `mkApps` [pa_dict, mono_vfn, mono_lfn, lenv]
297 data CEnvInfo = CEnvInfo {
299 , cenv_values :: [(CoreExpr, CoreExpr)]
302 , cenv_repr_tycon :: TyCon
303 , cenv_repr_tyargs :: [Type]
304 , cenv_repr_datacon :: DataCon
307 mkCEnvInfo :: VarSet -> Var -> CoreExprWithFVs -> VM CEnvInfo
308 mkCEnvInfo fvs arg body
310 locals <- readLEnv local_vars
313 [(var, val) | var <- varSetElems fvs
314 , Just val <- [lookupVarEnv locals var]]
315 vtys <- mapM (vectType . varType) vars
317 (vty, repr_tycon, repr_tyargs, repr_datacon) <- mk_env_ty vtys
318 lty <- mkPArrayType vty
325 , cenv_repr_tycon = repr_tycon
326 , cenv_repr_tyargs = repr_tyargs
327 , cenv_repr_datacon = repr_datacon
331 = return (vty, error "absent cinfo_repr_tycon"
332 , error "absent cinfo_repr_tyargs"
333 , error "absent cinfo_repr_datacon")
337 let ty = mkCoreTupTy vtys
338 (repr_tc, repr_tyargs) <- lookupPArrayFamInst ty
339 let [repr_con] = tyConDataCons repr_tc
340 return (ty, repr_tc, repr_tyargs, repr_con)
344 mkClosureEnvs :: CEnvInfo -> CoreExpr -> (CoreExpr, CoreExpr)
345 mkClosureEnvs info lc
347 = (Var unitDataConId, mkApps (Var $ dataConWrapId (cenv_repr_datacon info))
348 [lc, Var unitDataConId])
350 | [(vval, lval)] <- vals
354 = (mkCoreTup vvals, Var (dataConWrapId $ cenv_repr_datacon info)
355 `mkTyApps` cenv_repr_tyargs info
356 `mkApps` (lc : lvals))
359 vals = cenv_values info
360 (vvals, lvals) = unzip vals
362 mkClosureFns :: CEnvInfo -> [TyVar] -> Var -> CoreExprWithFVs
363 -> VM (CoreExpr, CoreExpr)
364 mkClosureFns info tyvars arg body
366 . abstractOverTyVars tyvars
369 (vfn, lfn) <- mkClosureMonoFns info arg body
370 return (mk_tlams vfn, mk_tlams lfn)
372 mkClosureMonoFns :: CEnvInfo -> Var -> CoreExprWithFVs -> VM (CoreExpr, CoreExpr)
373 mkClosureMonoFns info arg body
375 lc_bndr <- newLocalVar FSLIT("lc") intPrimTy
376 (varg : vbndrs, larg : lbndrs, (vbody, lbody))
377 <- vectBndrsIn (arg : cenv_vars info)
378 (vectExpr (Var lc_bndr) body)
380 venv_bndr <- newLocalVar FSLIT("env") vty
381 lenv_bndr <- newLocalVar FSLIT("env") lty
383 let vcase = bind_venv (Var venv_bndr) vbody vbndrs
384 lcase <- bind_lenv (Var lenv_bndr) lbody lc_bndr lbndrs
385 return (mkLams [venv_bndr, varg] vcase, mkLams [lenv_bndr, larg] lcase)
390 arity = length (cenv_vars info)
392 bind_venv venv vbody [] = vbody
393 bind_venv venv vbody [vbndr] = Let (NonRec vbndr venv) vbody
394 bind_venv venv vbody vbndrs
395 = Case venv (mkWildId vty) (exprType vbody)
396 [(DataAlt (tupleCon Boxed arity), vbndrs, vbody)]
398 bind_lenv lenv lbody lc_bndr [lbndr]
400 lengthPA <- builtin lengthPAVar
401 return . Let (NonRec lbndr lenv)
402 $ Case (mkApps (Var lengthPA) [Type vty, (Var lbndr)])
405 [(DEFAULT, [], lbody)]
407 bind_lenv lenv lbody lc_bndr lbndrs
408 = let scrut = unwrapFamInstScrut (cenv_repr_tycon info)
409 (cenv_repr_tyargs info)
411 lbndrs' | null lbndrs = [mkWildId unitTy]
416 (mkWildId (exprType scrut))
418 [(DataAlt (cenv_repr_datacon info), lc_bndr : lbndrs', lbody)]
420 vectTyAppExpr :: CoreExpr -> CoreExprWithFVs -> [Type] -> VM (CoreExpr, CoreExpr)
421 vectTyAppExpr lc (_, AnnVar v) tys = vectPolyVar lc v tys
422 vectTyAppExpr lc e tys = pprPanic "vectTyAppExpr" (ppr $ deAnnotate e)
424 -- ----------------------------------------------------------------------------
427 vectTyCon :: TyCon -> VM TyCon
429 | isFunTyCon tc = builtin closureTyCon
430 | isBoxedTupleTyCon tc = return tc
431 | isUnLiftedTyCon tc = return tc
435 Just tc' -> return tc'
437 -- FIXME: just for now
438 Nothing -> pprTrace "ccTyCon:" (ppr tc) $ return tc
440 vectType :: Type -> VM Type
441 vectType ty | Just ty' <- coreView ty = vectType ty'
442 vectType (TyVarTy tv) = return $ TyVarTy tv
443 vectType (AppTy ty1 ty2) = liftM2 AppTy (vectType ty1) (vectType ty2)
444 vectType (TyConApp tc tys) = liftM2 TyConApp (vectTyCon tc) (mapM vectType tys)
445 vectType (FunTy ty1 ty2) = liftM2 TyConApp (builtin closureTyCon)
446 (mapM vectType [ty1,ty2])
447 vectType ty@(ForAllTy _ _)
449 mdicts <- mapM paDictArgType tyvars
450 mono_ty' <- vectType mono_ty
451 return $ tyvars `mkForAllTys` ([dict | Just dict <- mdicts] `mkFunTys` mono_ty')
453 (tyvars, mono_ty) = splitForAllTys ty
455 vectType ty = pprPanic "vectType:" (ppr ty)