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 binds' <- mapM vectTopBind (mg_binds guts)
60 return $ guts { mg_binds = binds' }
62 vectTopBind :: CoreBind -> VM CoreBind
63 vectTopBind b@(NonRec var expr)
65 var' <- vectTopBinder var
66 expr' <- vectTopRhs expr
68 return . Rec $ (var, expr) : (var', expr') : hs
72 vectTopBind b@(Rec bs)
74 vars' <- mapM vectTopBinder vars
75 exprs' <- mapM vectTopRhs exprs
77 return . Rec $ bs ++ zip vars' exprs' ++ hs
81 (vars, exprs) = unzip bs
83 vectTopBinder :: Var -> VM Var
86 vty <- vectType (idType var)
87 name <- cloneName mkVectOcc (getName var)
88 let var' | isExportedId var = Id.mkExportedLocalId name vty
89 | otherwise = Id.mkLocalId name vty
93 vectTopRhs :: CoreExpr -> VM CoreExpr
94 vectTopRhs = liftM fst . closedV . vectPolyExpr (panic "Empty lifting context") . freeVars
96 -- ----------------------------------------------------------------------------
99 vectBndr :: Var -> VM (Var, Var)
102 vty <- vectType (idType v)
103 lty <- mkPArrayType vty
104 let vv = v `Id.setIdType` vty
105 lv = v `Id.setIdType` lty
106 updLEnv (mapTo vv lv)
109 mapTo vv lv env = env { local_vars = extendVarEnv (local_vars env) v (Var vv, Var lv) }
111 vectBndrIn :: Var -> VM a -> VM (Var, Var, a)
115 (vv, lv) <- vectBndr v
119 vectBndrsIn :: [Var] -> VM a -> VM ([Var], [Var], a)
123 (vvs, lvs) <- mapAndUnzipM vectBndr vs
127 -- ----------------------------------------------------------------------------
130 replicateP :: CoreExpr -> CoreExpr -> VM CoreExpr
133 dict <- paDictOfType ty
134 rep <- builtin replicatePAVar
135 return $ mkApps (Var rep) [Type ty, dict, expr, len]
139 capply :: (CoreExpr, CoreExpr) -> (CoreExpr, CoreExpr) -> VM (CoreExpr, CoreExpr)
140 capply (vfn, lfn) (varg, larg)
142 apply <- builtin applyClosureVar
143 applyP <- builtin applyClosurePVar
144 return (mkApps (Var apply) [Type arg_ty, Type res_ty, vfn, varg],
145 mkApps (Var applyP) [Type arg_ty, Type res_ty, lfn, larg])
148 (arg_ty, res_ty) = splitClosureTy fn_ty
150 vectVar :: CoreExpr -> Var -> VM (CoreExpr, CoreExpr)
155 Local es -> return es
157 lexpr <- replicateP vexpr lc
158 return (vexpr, lexpr)
160 vectPolyVar :: CoreExpr -> Var -> [Type] -> VM (CoreExpr, CoreExpr)
165 Local (vexpr, lexpr) -> liftM2 (,) (mk_app vexpr) (mk_app lexpr)
168 lexpr <- replicateP vexpr lc
169 return (vexpr, lexpr)
171 mk_app e = applyToTypes e =<< mapM vectType tys
173 abstractOverTyVars :: [TyVar] -> ((CoreExpr -> CoreExpr) -> VM a) -> VM a
174 abstractOverTyVars tvs p
176 mdicts <- mapM mk_dict_var tvs
177 zipWithM_ (\tv -> maybe (defLocalTyVar tv) (defLocalTyVarWithPA tv . Var)) tvs mdicts
181 r <- paDictArgType tv
183 Just ty -> liftM Just (newLocalVar FSLIT("dPA") ty)
184 Nothing -> return Nothing
186 mk_lams mdicts = mkLams (tvs ++ [dict | Just dict <- mdicts])
188 applyToTypes :: CoreExpr -> [Type] -> VM CoreExpr
189 applyToTypes expr tys
191 dicts <- mapM paDictOfType tys
192 return $ expr `mkTyApps` tys `mkApps` dicts
194 vectPolyExpr :: CoreExpr -> CoreExprWithFVs -> VM (CoreExpr, CoreExpr)
197 . abstractOverTyVars tvs $ \mk_lams ->
198 -- FIXME: shadowing (tvs in lc)
200 (vmono, lmono) <- vectExpr lc mono
201 return $ (mk_lams vmono, mk_lams lmono)
203 (tvs, mono) = collectAnnTypeBinders expr
205 vectExpr :: CoreExpr -> CoreExprWithFVs -> VM (CoreExpr, CoreExpr)
206 vectExpr lc (_, AnnType ty)
209 return (Type vty, Type vty)
211 vectExpr lc (_, AnnVar v) = vectVar lc v
213 vectExpr lc (_, AnnLit lit)
216 lexpr <- replicateP vexpr lc
217 return (vexpr, lexpr)
219 vectExpr lc (_, AnnNote note expr)
221 (vexpr, lexpr) <- vectExpr lc expr
222 return (Note note vexpr, Note note lexpr)
224 vectExpr lc e@(_, AnnApp _ arg)
226 = vectTyAppExpr lc fn tys
228 (fn, tys) = collectAnnTypeArgs e
230 vectExpr lc (_, AnnApp fn arg)
232 fn' <- vectExpr lc fn
233 arg' <- vectExpr lc arg
236 vectExpr lc (_, AnnCase expr bndr ty alts)
237 = panic "vectExpr: case"
239 vectExpr lc (_, AnnLet (AnnNonRec bndr rhs) body)
241 (vrhs, lrhs) <- vectPolyExpr lc rhs
242 (vbndr, lbndr, (vbody, lbody)) <- vectBndrIn bndr (vectExpr lc body)
243 return (Let (NonRec vbndr vrhs) vbody,
244 Let (NonRec lbndr lrhs) lbody)
246 vectExpr lc (_, AnnLet (AnnRec prs) body)
248 (vbndrs, lbndrs, (vrhss, vbody, lrhss, lbody)) <- vectBndrsIn bndrs vect
249 return (Let (Rec (zip vbndrs vrhss)) vbody,
250 Let (Rec (zip lbndrs lrhss)) lbody)
252 (bndrs, rhss) = unzip prs
255 (vrhss, lrhss) <- mapAndUnzipM (vectExpr lc) rhss
256 (vbody, lbody) <- vectPolyExpr lc body
257 return (vrhss, vbody, lrhss, lbody)
259 vectExpr lc e@(_, AnnLam bndr body)
260 | isTyVar bndr = pprPanic "vectExpr" (ppr $ deAnnotate e)
262 vectExpr lc (fvs, AnnLam bndr body)
264 tyvars <- localTyVars
265 info <- mkCEnvInfo fvs bndr body
266 (poly_vfn, poly_lfn) <- mkClosureFns info tyvars bndr body
268 vfn_var <- hoistExpr FSLIT("vfn") poly_vfn
269 lfn_var <- hoistExpr FSLIT("lfn") poly_lfn
271 let (venv, lenv) = mkClosureEnvs info lc
273 let env_ty = cenv_vty info
275 pa_dict <- paDictOfType env_ty
277 arg_ty <- vectType (varType bndr)
278 res_ty <- vectType (exprType $ deAnnotate body)
280 -- FIXME: move the functions to the top level
281 mono_vfn <- applyToTypes (Var vfn_var) (mkTyVarTys tyvars)
282 mono_lfn <- applyToTypes (Var lfn_var) (mkTyVarTys tyvars)
284 mk_clo <- builtin mkClosureVar
285 mk_cloP <- builtin mkClosurePVar
287 let vclo = Var mk_clo `mkTyApps` [arg_ty, res_ty, env_ty]
288 `mkApps` [pa_dict, mono_vfn, mono_lfn, venv]
290 lclo = Var mk_cloP `mkTyApps` [arg_ty, res_ty, env_ty]
291 `mkApps` [pa_dict, mono_vfn, mono_lfn, lenv]
296 data CEnvInfo = CEnvInfo {
298 , cenv_values :: [(CoreExpr, CoreExpr)]
301 , cenv_repr_tycon :: TyCon
302 , cenv_repr_tyargs :: [Type]
303 , cenv_repr_datacon :: DataCon
306 mkCEnvInfo :: VarSet -> Var -> CoreExprWithFVs -> VM CEnvInfo
307 mkCEnvInfo fvs arg body
309 locals <- readLEnv local_vars
312 [(var, val) | var <- varSetElems fvs
313 , Just val <- [lookupVarEnv locals var]]
314 vtys <- mapM (vectType . varType) vars
316 (vty, repr_tycon, repr_tyargs, repr_datacon) <- mk_env_ty vtys
317 lty <- mkPArrayType vty
324 , cenv_repr_tycon = repr_tycon
325 , cenv_repr_tyargs = repr_tyargs
326 , cenv_repr_datacon = repr_datacon
330 = return (vty, error "absent cinfo_repr_tycon"
331 , error "absent cinfo_repr_tyargs"
332 , error "absent cinfo_repr_datacon")
336 let ty = mkCoreTupTy vtys
337 (repr_tc, repr_tyargs) <- lookupPArrayFamInst ty
338 let [repr_con] = tyConDataCons repr_tc
339 return (ty, repr_tc, repr_tyargs, repr_con)
343 mkClosureEnvs :: CEnvInfo -> CoreExpr -> (CoreExpr, CoreExpr)
344 mkClosureEnvs info lc
346 = (Var unitDataConId, mkApps (Var $ dataConWrapId (cenv_repr_datacon info))
347 [lc, Var unitDataConId])
349 | [(vval, lval)] <- vals
353 = (mkCoreTup vvals, Var (dataConWrapId $ cenv_repr_datacon info)
354 `mkTyApps` cenv_repr_tyargs info
355 `mkApps` (lc : lvals))
358 vals = cenv_values info
359 (vvals, lvals) = unzip vals
361 mkClosureFns :: CEnvInfo -> [TyVar] -> Var -> CoreExprWithFVs
362 -> VM (CoreExpr, CoreExpr)
363 mkClosureFns info tyvars arg body
365 . abstractOverTyVars tyvars
368 (vfn, lfn) <- mkClosureMonoFns info arg body
369 return (mk_tlams vfn, mk_tlams lfn)
371 mkClosureMonoFns :: CEnvInfo -> Var -> CoreExprWithFVs -> VM (CoreExpr, CoreExpr)
372 mkClosureMonoFns info arg body
374 lc_bndr <- newLocalVar FSLIT("lc") intPrimTy
375 (varg : vbndrs, larg : lbndrs, (vbody, lbody))
376 <- vectBndrsIn (arg : cenv_vars info)
377 (vectExpr (Var lc_bndr) body)
379 venv_bndr <- newLocalVar FSLIT("env") vty
380 lenv_bndr <- newLocalVar FSLIT("env") lty
382 let vcase = bind_venv (Var venv_bndr) vbody vbndrs
383 lcase <- bind_lenv (Var lenv_bndr) lbody lc_bndr lbndrs
384 return (mkLams [venv_bndr, varg] vcase, mkLams [lenv_bndr, larg] lcase)
389 arity = length (cenv_vars info)
391 bind_venv venv vbody [] = vbody
392 bind_venv venv vbody [vbndr] = Let (NonRec vbndr venv) vbody
393 bind_venv venv vbody vbndrs
394 = Case venv (mkWildId vty) (exprType vbody)
395 [(DataAlt (tupleCon Boxed arity), vbndrs, vbody)]
397 bind_lenv lenv lbody lc_bndr [lbndr]
399 lengthPA <- builtin lengthPAVar
400 pa_dict <- paDictOfType vty
401 return . Let (NonRec lbndr lenv)
402 $ Case (mkApps (Var lengthPA) [Type vty, pa_dict, (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)