1 module Vectorise( vectorise )
4 #include "HsVersions.h"
13 import CoreLint ( showPass, endPass )
17 import SimplMonad ( SimplCount, zeroSimplCount )
18 import Rules ( RuleBase )
22 import FamInstEnv ( extendFamInstEnvList )
23 import InstEnv ( extendInstEnvList )
27 import Name ( mkSysTvName, getName )
30 import MkId ( unwrapFamInstScrut )
33 import DsMonad hiding (mapAndUnzipM)
34 import DsUtils ( mkCoreTup, mkCoreTupTy )
38 import TysPrim ( intPrimTy )
39 import BasicTypes ( Boxity(..) )
43 import Control.Monad ( liftM, liftM2, mapAndUnzipM, zipWithM_ )
45 vectorise :: HscEnv -> UniqSupply -> RuleBase -> ModGuts
46 -> IO (SimplCount, ModGuts)
47 vectorise hsc_env _ _ guts
49 showPass dflags "Vectorisation"
51 let info = hptVectInfo hsc_env `plusVectInfo` eps_vect_info eps
52 Just (info', guts') <- initV hsc_env guts info (vectModule guts)
53 endPass dflags "Vectorisation" Opt_D_dump_vect (mg_binds guts')
54 return (zeroSimplCount dflags, guts' { mg_vect_info = info' })
56 dflags = hsc_dflags hsc_env
58 vectModule :: ModGuts -> VM ModGuts
61 (types', fam_insts, insts) <- vectTypeEnv (mg_types guts)
63 let fam_inst_env' = extendFamInstEnvList (mg_fam_inst_env guts) fam_insts
64 inst_env' = extendInstEnvList (mg_inst_env guts) insts
65 updGEnv (setInstEnvs inst_env' fam_inst_env')
67 binds' <- mapM vectTopBind (mg_binds guts)
68 return $ guts { mg_types = types'
70 , mg_inst_env = inst_env'
71 , mg_fam_inst_env = fam_inst_env'
72 , mg_insts = mg_insts guts ++ insts
73 , mg_fam_insts = mg_fam_insts guts ++ fam_insts
76 vectTopBind :: CoreBind -> VM CoreBind
77 vectTopBind b@(NonRec var expr)
79 var' <- vectTopBinder var
80 expr' <- vectTopRhs expr
82 return . Rec $ (var, expr) : (var', expr') : hs
86 vectTopBind b@(Rec bs)
88 vars' <- mapM vectTopBinder vars
89 exprs' <- mapM vectTopRhs exprs
91 return . Rec $ bs ++ zip vars' exprs' ++ hs
95 (vars, exprs) = unzip bs
97 vectTopBinder :: Var -> VM Var
100 vty <- vectType (idType var)
101 name <- cloneName mkVectOcc (getName var)
102 let var' | isExportedId var = Id.mkExportedLocalId name vty
103 | otherwise = Id.mkLocalId name vty
104 defGlobalVar var var'
107 vectTopRhs :: CoreExpr -> VM CoreExpr
108 vectTopRhs = liftM fst . closedV . vectPolyExpr (panic "Empty lifting context") . freeVars
110 -- ----------------------------------------------------------------------------
113 vectBndr :: Var -> VM (Var, Var)
116 vty <- vectType (idType v)
117 lty <- mkPArrayType vty
118 let vv = v `Id.setIdType` vty
119 lv = v `Id.setIdType` lty
120 updLEnv (mapTo vv lv)
123 mapTo vv lv env = env { local_vars = extendVarEnv (local_vars env) v (Var vv, Var lv) }
125 vectBndrIn :: Var -> VM a -> VM (Var, Var, a)
129 (vv, lv) <- vectBndr v
133 vectBndrsIn :: [Var] -> VM a -> VM ([Var], [Var], a)
137 (vvs, lvs) <- mapAndUnzipM vectBndr vs
141 -- ----------------------------------------------------------------------------
144 replicateP :: CoreExpr -> CoreExpr -> VM CoreExpr
147 dict <- paDictOfType ty
148 rep <- builtin replicatePAVar
149 return $ mkApps (Var rep) [Type ty, dict, expr, len]
153 capply :: (CoreExpr, CoreExpr) -> (CoreExpr, CoreExpr) -> VM (CoreExpr, CoreExpr)
154 capply (vfn, lfn) (varg, larg)
156 apply <- builtin applyClosureVar
157 applyP <- builtin applyClosurePVar
158 return (mkApps (Var apply) [Type arg_ty, Type res_ty, vfn, varg],
159 mkApps (Var applyP) [Type arg_ty, Type res_ty, lfn, larg])
162 (arg_ty, res_ty) = splitClosureTy fn_ty
164 vectVar :: CoreExpr -> Var -> VM (CoreExpr, CoreExpr)
169 Local es -> return es
171 lexpr <- replicateP vexpr lc
172 return (vexpr, lexpr)
174 vectPolyVar :: CoreExpr -> Var -> [Type] -> VM (CoreExpr, CoreExpr)
179 Local (vexpr, lexpr) -> liftM2 (,) (mk_app vexpr) (mk_app lexpr)
182 lexpr <- replicateP vexpr lc
183 return (vexpr, lexpr)
185 mk_app e = applyToTypes e =<< mapM vectType tys
187 abstractOverTyVars :: [TyVar] -> ((CoreExpr -> CoreExpr) -> VM a) -> VM a
188 abstractOverTyVars tvs p
190 mdicts <- mapM mk_dict_var tvs
191 zipWithM_ (\tv -> maybe (defLocalTyVar tv) (defLocalTyVarWithPA tv . Var)) tvs mdicts
195 r <- paDictArgType tv
197 Just ty -> liftM Just (newLocalVar FSLIT("dPA") ty)
198 Nothing -> return Nothing
200 mk_lams mdicts = mkLams (tvs ++ [dict | Just dict <- mdicts])
202 applyToTypes :: CoreExpr -> [Type] -> VM CoreExpr
203 applyToTypes expr tys
205 dicts <- mapM paDictOfType tys
206 return $ expr `mkTyApps` tys `mkApps` dicts
208 vectPolyExpr :: CoreExpr -> CoreExprWithFVs -> VM (CoreExpr, CoreExpr)
211 . abstractOverTyVars tvs $ \mk_lams ->
212 -- FIXME: shadowing (tvs in lc)
214 (vmono, lmono) <- vectExpr lc mono
215 return $ (mk_lams vmono, mk_lams lmono)
217 (tvs, mono) = collectAnnTypeBinders expr
219 vectExpr :: CoreExpr -> CoreExprWithFVs -> VM (CoreExpr, CoreExpr)
220 vectExpr lc (_, AnnType ty)
223 return (Type vty, Type vty)
225 vectExpr lc (_, AnnVar v) = vectVar lc v
227 vectExpr lc (_, AnnLit lit)
230 lexpr <- replicateP vexpr lc
231 return (vexpr, lexpr)
233 vectExpr lc (_, AnnNote note expr)
235 (vexpr, lexpr) <- vectExpr lc expr
236 return (Note note vexpr, Note note lexpr)
238 vectExpr lc e@(_, AnnApp _ arg)
240 = vectTyAppExpr lc fn tys
242 (fn, tys) = collectAnnTypeArgs e
244 vectExpr lc (_, AnnApp fn arg)
246 fn' <- vectExpr lc fn
247 arg' <- vectExpr lc arg
250 vectExpr lc (_, AnnCase expr bndr ty alts)
251 = panic "vectExpr: case"
253 vectExpr lc (_, AnnLet (AnnNonRec bndr rhs) body)
255 (vrhs, lrhs) <- vectPolyExpr lc rhs
256 (vbndr, lbndr, (vbody, lbody)) <- vectBndrIn bndr (vectExpr lc body)
257 return (Let (NonRec vbndr vrhs) vbody,
258 Let (NonRec lbndr lrhs) lbody)
260 vectExpr lc (_, AnnLet (AnnRec prs) body)
262 (vbndrs, lbndrs, (vrhss, vbody, lrhss, lbody)) <- vectBndrsIn bndrs vect
263 return (Let (Rec (zip vbndrs vrhss)) vbody,
264 Let (Rec (zip lbndrs lrhss)) lbody)
266 (bndrs, rhss) = unzip prs
269 (vrhss, lrhss) <- mapAndUnzipM (vectExpr lc) rhss
270 (vbody, lbody) <- vectPolyExpr lc body
271 return (vrhss, vbody, lrhss, lbody)
273 vectExpr lc e@(_, AnnLam bndr body)
274 | isTyVar bndr = pprPanic "vectExpr" (ppr $ deAnnotate e)
276 vectExpr lc (fvs, AnnLam bndr body)
278 tyvars <- localTyVars
279 info <- mkCEnvInfo fvs bndr body
280 (poly_vfn, poly_lfn) <- mkClosureFns info tyvars bndr body
282 vfn_var <- hoistExpr FSLIT("vfn") poly_vfn
283 lfn_var <- hoistExpr FSLIT("lfn") poly_lfn
285 let (venv, lenv) = mkClosureEnvs info lc
287 let env_ty = cenv_vty info
289 pa_dict <- paDictOfType env_ty
291 arg_ty <- vectType (varType bndr)
292 res_ty <- vectType (exprType $ deAnnotate body)
294 -- FIXME: move the functions to the top level
295 mono_vfn <- applyToTypes (Var vfn_var) (mkTyVarTys tyvars)
296 mono_lfn <- applyToTypes (Var lfn_var) (mkTyVarTys tyvars)
298 mk_clo <- builtin mkClosureVar
299 mk_cloP <- builtin mkClosurePVar
301 let vclo = Var mk_clo `mkTyApps` [arg_ty, res_ty, env_ty]
302 `mkApps` [pa_dict, mono_vfn, mono_lfn, venv]
304 lclo = Var mk_cloP `mkTyApps` [arg_ty, res_ty, env_ty]
305 `mkApps` [pa_dict, mono_vfn, mono_lfn, lenv]
310 data CEnvInfo = CEnvInfo {
312 , cenv_values :: [(CoreExpr, CoreExpr)]
315 , cenv_repr_tycon :: TyCon
316 , cenv_repr_tyargs :: [Type]
317 , cenv_repr_datacon :: DataCon
320 mkCEnvInfo :: VarSet -> Var -> CoreExprWithFVs -> VM CEnvInfo
321 mkCEnvInfo fvs arg body
323 locals <- readLEnv local_vars
326 [(var, val) | var <- varSetElems fvs
327 , Just val <- [lookupVarEnv locals var]]
328 vtys <- mapM (vectType . varType) vars
330 (vty, repr_tycon, repr_tyargs, repr_datacon) <- mk_env_ty vtys
331 lty <- mkPArrayType vty
338 , cenv_repr_tycon = repr_tycon
339 , cenv_repr_tyargs = repr_tyargs
340 , cenv_repr_datacon = repr_datacon
344 = return (vty, error "absent cinfo_repr_tycon"
345 , error "absent cinfo_repr_tyargs"
346 , error "absent cinfo_repr_datacon")
350 let ty = mkCoreTupTy vtys
351 (repr_tc, repr_tyargs) <- lookupPArrayFamInst ty
352 let [repr_con] = tyConDataCons repr_tc
353 return (ty, repr_tc, repr_tyargs, repr_con)
357 mkClosureEnvs :: CEnvInfo -> CoreExpr -> (CoreExpr, CoreExpr)
358 mkClosureEnvs info lc
360 = (Var unitDataConId, mkApps (Var $ dataConWrapId (cenv_repr_datacon info))
361 [lc, Var unitDataConId])
363 | [(vval, lval)] <- vals
367 = (mkCoreTup vvals, Var (dataConWrapId $ cenv_repr_datacon info)
368 `mkTyApps` cenv_repr_tyargs info
369 `mkApps` (lc : lvals))
372 vals = cenv_values info
373 (vvals, lvals) = unzip vals
375 mkClosureFns :: CEnvInfo -> [TyVar] -> Var -> CoreExprWithFVs
376 -> VM (CoreExpr, CoreExpr)
377 mkClosureFns info tyvars arg body
379 . abstractOverTyVars tyvars
382 (vfn, lfn) <- mkClosureMonoFns info arg body
383 return (mk_tlams vfn, mk_tlams lfn)
385 mkClosureMonoFns :: CEnvInfo -> Var -> CoreExprWithFVs -> VM (CoreExpr, CoreExpr)
386 mkClosureMonoFns info arg body
388 lc_bndr <- newLocalVar FSLIT("lc") intPrimTy
389 (varg : vbndrs, larg : lbndrs, (vbody, lbody))
390 <- vectBndrsIn (arg : cenv_vars info)
391 (vectExpr (Var lc_bndr) body)
393 venv_bndr <- newLocalVar FSLIT("env") vty
394 lenv_bndr <- newLocalVar FSLIT("env") lty
396 let vcase = bind_venv (Var venv_bndr) vbody vbndrs
397 lcase <- bind_lenv (Var lenv_bndr) lbody lc_bndr lbndrs
398 return (mkLams [venv_bndr, varg] vcase, mkLams [lenv_bndr, larg] lcase)
403 arity = length (cenv_vars info)
405 bind_venv venv vbody [] = vbody
406 bind_venv venv vbody [vbndr] = Let (NonRec vbndr venv) vbody
407 bind_venv venv vbody vbndrs
408 = Case venv (mkWildId vty) (exprType vbody)
409 [(DataAlt (tupleCon Boxed arity), vbndrs, vbody)]
411 bind_lenv lenv lbody lc_bndr [lbndr]
413 lengthPA <- builtin lengthPAVar
414 pa_dict <- paDictOfType vty
415 return . Let (NonRec lbndr lenv)
416 $ Case (mkApps (Var lengthPA) [Type vty, pa_dict, (Var lbndr)])
419 [(DEFAULT, [], lbody)]
421 bind_lenv lenv lbody lc_bndr lbndrs
422 = let scrut = unwrapFamInstScrut (cenv_repr_tycon info)
423 (cenv_repr_tyargs info)
425 lbndrs' | null lbndrs = [mkWildId unitTy]
430 (mkWildId (exprType scrut))
432 [(DataAlt (cenv_repr_datacon info), lc_bndr : lbndrs', lbody)]
434 vectTyAppExpr :: CoreExpr -> CoreExprWithFVs -> [Type] -> VM (CoreExpr, CoreExpr)
435 vectTyAppExpr lc (_, AnnVar v) tys = vectPolyVar lc v tys
436 vectTyAppExpr lc e tys = pprPanic "vectTyAppExpr" (ppr $ deAnnotate e)