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 capply :: (CoreExpr, CoreExpr) -> (CoreExpr, CoreExpr) -> VM (CoreExpr, CoreExpr)
145 capply (vfn, lfn) (varg, larg)
147 apply <- builtin applyClosureVar
148 applyP <- builtin applyClosurePVar
149 return (mkApps (Var apply) [Type arg_ty, Type res_ty, vfn, varg],
150 mkApps (Var applyP) [Type arg_ty, Type res_ty, lfn, larg])
153 (arg_ty, res_ty) = splitClosureTy fn_ty
155 vectVar :: CoreExpr -> Var -> VM (CoreExpr, CoreExpr)
160 Local es -> return es
162 lexpr <- replicatePA vexpr lc
163 return (vexpr, lexpr)
165 vectPolyVar :: CoreExpr -> Var -> [Type] -> VM (CoreExpr, CoreExpr)
170 Local (vexpr, lexpr) -> liftM2 (,) (mk_app vexpr) (mk_app lexpr)
173 lexpr <- replicatePA vexpr lc
174 return (vexpr, lexpr)
176 mk_app e = applyToTypes e =<< mapM vectType tys
178 abstractOverTyVars :: [TyVar] -> ((CoreExpr -> CoreExpr) -> VM a) -> VM a
179 abstractOverTyVars tvs p
181 mdicts <- mapM mk_dict_var tvs
182 zipWithM_ (\tv -> maybe (defLocalTyVar tv) (defLocalTyVarWithPA tv . Var)) tvs mdicts
186 r <- paDictArgType tv
188 Just ty -> liftM Just (newLocalVar FSLIT("dPA") ty)
189 Nothing -> return Nothing
191 mk_lams mdicts = mkLams (tvs ++ [dict | Just dict <- mdicts])
193 applyToTypes :: CoreExpr -> [Type] -> VM CoreExpr
194 applyToTypes expr tys
196 dicts <- mapM paDictOfType tys
197 return $ expr `mkTyApps` tys `mkApps` dicts
199 vectPolyExpr :: CoreExpr -> CoreExprWithFVs -> VM (CoreExpr, CoreExpr)
202 . abstractOverTyVars tvs $ \mk_lams ->
203 -- FIXME: shadowing (tvs in lc)
205 (vmono, lmono) <- vectExpr lc mono
206 return $ (mk_lams vmono, mk_lams lmono)
208 (tvs, mono) = collectAnnTypeBinders expr
210 vectExpr :: CoreExpr -> CoreExprWithFVs -> VM (CoreExpr, CoreExpr)
211 vectExpr lc (_, AnnType ty)
214 return (Type vty, Type vty)
216 vectExpr lc (_, AnnVar v) = vectVar lc v
218 vectExpr lc (_, AnnLit lit)
221 lexpr <- replicatePA vexpr lc
222 return (vexpr, lexpr)
224 vectExpr lc (_, AnnNote note expr)
226 (vexpr, lexpr) <- vectExpr lc expr
227 return (Note note vexpr, Note note lexpr)
229 vectExpr lc e@(_, AnnApp _ arg)
231 = vectTyAppExpr lc fn tys
233 (fn, tys) = collectAnnTypeArgs e
235 vectExpr lc (_, AnnApp fn arg)
237 fn' <- vectExpr lc fn
238 arg' <- vectExpr lc arg
241 vectExpr lc (_, AnnCase expr bndr ty alts)
242 = panic "vectExpr: case"
244 vectExpr lc (_, AnnLet (AnnNonRec bndr rhs) body)
246 (vrhs, lrhs) <- vectPolyExpr lc rhs
247 (vbndr, lbndr, (vbody, lbody)) <- vectBndrIn bndr (vectExpr lc body)
248 return (Let (NonRec vbndr vrhs) vbody,
249 Let (NonRec lbndr lrhs) lbody)
251 vectExpr lc (_, AnnLet (AnnRec prs) body)
253 (vbndrs, lbndrs, (vrhss, vbody, lrhss, lbody)) <- vectBndrsIn bndrs vect
254 return (Let (Rec (zip vbndrs vrhss)) vbody,
255 Let (Rec (zip lbndrs lrhss)) lbody)
257 (bndrs, rhss) = unzip prs
260 (vrhss, lrhss) <- mapAndUnzipM (vectExpr lc) rhss
261 (vbody, lbody) <- vectPolyExpr lc body
262 return (vrhss, vbody, lrhss, lbody)
264 vectExpr lc e@(_, AnnLam bndr body)
265 | isTyVar bndr = pprPanic "vectExpr" (ppr $ deAnnotate e)
267 vectExpr lc (fvs, AnnLam bndr body)
269 tyvars <- localTyVars
270 info <- mkCEnvInfo fvs bndr body
271 (poly_vfn, poly_lfn) <- mkClosureFns info tyvars bndr body
273 vfn_var <- hoistExpr FSLIT("vfn") poly_vfn
274 lfn_var <- hoistExpr FSLIT("lfn") poly_lfn
276 let (venv, lenv) = mkClosureEnvs info lc
278 let env_ty = cenv_vty info
280 pa_dict <- paDictOfType env_ty
282 arg_ty <- vectType (varType bndr)
283 res_ty <- vectType (exprType $ deAnnotate body)
285 -- FIXME: move the functions to the top level
286 mono_vfn <- applyToTypes (Var vfn_var) (mkTyVarTys tyvars)
287 mono_lfn <- applyToTypes (Var lfn_var) (mkTyVarTys tyvars)
289 mk_clo <- builtin mkClosureVar
290 mk_cloP <- builtin mkClosurePVar
292 let vclo = Var mk_clo `mkTyApps` [arg_ty, res_ty, env_ty]
293 `mkApps` [pa_dict, mono_vfn, mono_lfn, venv]
295 lclo = Var mk_cloP `mkTyApps` [arg_ty, res_ty, env_ty]
296 `mkApps` [pa_dict, mono_vfn, mono_lfn, lenv]
301 data CEnvInfo = CEnvInfo {
303 , cenv_values :: [(CoreExpr, CoreExpr)]
306 , cenv_repr_tycon :: TyCon
307 , cenv_repr_tyargs :: [Type]
308 , cenv_repr_datacon :: DataCon
311 mkCEnvInfo :: VarSet -> Var -> CoreExprWithFVs -> VM CEnvInfo
312 mkCEnvInfo fvs arg body
314 locals <- readLEnv local_vars
317 [(var, val) | var <- varSetElems fvs
318 , Just val <- [lookupVarEnv locals var]]
319 vtys <- mapM (vectType . varType) vars
321 (vty, repr_tycon, repr_tyargs, repr_datacon) <- mk_env_ty vtys
322 lty <- mkPArrayType vty
329 , cenv_repr_tycon = repr_tycon
330 , cenv_repr_tyargs = repr_tyargs
331 , cenv_repr_datacon = repr_datacon
335 = return (vty, error "absent cinfo_repr_tycon"
336 , error "absent cinfo_repr_tyargs"
337 , error "absent cinfo_repr_datacon")
341 let ty = mkCoreTupTy vtys
342 (repr_tc, repr_tyargs) <- lookupPArrayFamInst ty
343 let [repr_con] = tyConDataCons repr_tc
344 return (ty, repr_tc, repr_tyargs, repr_con)
348 mkClosureEnvs :: CEnvInfo -> CoreExpr -> (CoreExpr, CoreExpr)
349 mkClosureEnvs info lc
351 = (Var unitDataConId, mkApps (Var $ dataConWrapId (cenv_repr_datacon info))
352 [lc, Var unitDataConId])
354 | [(vval, lval)] <- vals
358 = (mkCoreTup vvals, Var (dataConWrapId $ cenv_repr_datacon info)
359 `mkTyApps` cenv_repr_tyargs info
360 `mkApps` (lc : lvals))
363 vals = cenv_values info
364 (vvals, lvals) = unzip vals
366 mkClosureFns :: CEnvInfo -> [TyVar] -> Var -> CoreExprWithFVs
367 -> VM (CoreExpr, CoreExpr)
368 mkClosureFns info tyvars arg body
370 . abstractOverTyVars tyvars
373 (vfn, lfn) <- mkClosureMonoFns info arg body
374 return (mk_tlams vfn, mk_tlams lfn)
376 mkClosureMonoFns :: CEnvInfo -> Var -> CoreExprWithFVs -> VM (CoreExpr, CoreExpr)
377 mkClosureMonoFns info arg body
379 lc_bndr <- newLocalVar FSLIT("lc") intPrimTy
380 (varg : vbndrs, larg : lbndrs, (vbody, lbody))
381 <- vectBndrsIn (arg : cenv_vars info)
382 (vectExpr (Var lc_bndr) body)
384 venv_bndr <- newLocalVar FSLIT("env") vty
385 lenv_bndr <- newLocalVar FSLIT("env") lty
387 let vcase = bind_venv (Var venv_bndr) vbody vbndrs
388 lcase <- bind_lenv (Var lenv_bndr) lbody lc_bndr lbndrs
389 return (mkLams [venv_bndr, varg] vcase, mkLams [lenv_bndr, larg] lcase)
394 arity = length (cenv_vars info)
396 bind_venv venv vbody [] = vbody
397 bind_venv venv vbody [vbndr] = Let (NonRec vbndr venv) vbody
398 bind_venv venv vbody vbndrs
399 = Case venv (mkWildId vty) (exprType vbody)
400 [(DataAlt (tupleCon Boxed arity), vbndrs, vbody)]
402 bind_lenv lenv lbody lc_bndr [lbndr]
404 len <- lengthPA (Var lbndr)
405 return . Let (NonRec lbndr lenv)
409 [(DEFAULT, [], lbody)]
411 bind_lenv lenv lbody lc_bndr lbndrs
412 = let scrut = unwrapFamInstScrut (cenv_repr_tycon info)
413 (cenv_repr_tyargs info)
415 lbndrs' | null lbndrs = [mkWildId unitTy]
420 (mkWildId (exprType scrut))
422 [(DataAlt (cenv_repr_datacon info), lc_bndr : lbndrs', lbody)]
424 vectTyAppExpr :: CoreExpr -> CoreExprWithFVs -> [Type] -> VM (CoreExpr, CoreExpr)
425 vectTyAppExpr lc (_, AnnVar v) tys = vectPolyVar lc v tys
426 vectTyAppExpr lc e tys = pprPanic "vectTyAppExpr" (ppr $ deAnnotate e)