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 )
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, pa_insts) <- vectTypeEnv (mg_types guts)
63 let insts = map painstInstance pa_insts
64 fam_inst_env' = extendFamInstEnvList (mg_fam_inst_env guts) fam_insts
65 inst_env' = extendInstEnvList (mg_inst_env guts) insts
66 updGEnv (setInstEnvs inst_env' fam_inst_env')
68 dicts <- mapM buildPADict pa_insts
69 binds' <- mapM vectTopBind (mg_binds guts)
70 return $ guts { mg_types = types'
71 , mg_binds = Rec (concat dicts) : binds'
72 , mg_inst_env = inst_env'
73 , mg_fam_inst_env = fam_inst_env'
74 , mg_insts = mg_insts guts ++ insts
75 , mg_fam_insts = mg_fam_insts guts ++ fam_insts
78 vectTopBind :: CoreBind -> VM CoreBind
79 vectTopBind b@(NonRec var expr)
81 var' <- vectTopBinder var
82 expr' <- vectTopRhs expr
84 return . Rec $ (var, expr) : (var', expr') : hs
88 vectTopBind b@(Rec bs)
90 vars' <- mapM vectTopBinder vars
91 exprs' <- mapM vectTopRhs exprs
93 return . Rec $ bs ++ zip vars' exprs' ++ hs
97 (vars, exprs) = unzip bs
99 vectTopBinder :: Var -> VM Var
102 vty <- vectType (idType var)
103 name <- cloneName mkVectOcc (getName var)
104 let var' | isExportedId var = Id.mkExportedLocalId name vty
105 | otherwise = Id.mkLocalId name vty
106 defGlobalVar var var'
109 vectTopRhs :: CoreExpr -> VM CoreExpr
110 vectTopRhs = liftM fst . closedV . vectPolyExpr (panic "Empty lifting context") . freeVars
112 -- ----------------------------------------------------------------------------
115 vectBndr :: Var -> VM (Var, Var)
118 vty <- vectType (idType v)
119 lty <- mkPArrayType vty
120 let vv = v `Id.setIdType` vty
121 lv = v `Id.setIdType` lty
122 updLEnv (mapTo vv lv)
125 mapTo vv lv env = env { local_vars = extendVarEnv (local_vars env) v (Var vv, Var lv) }
127 vectBndrIn :: Var -> VM a -> VM (Var, Var, a)
131 (vv, lv) <- vectBndr v
135 vectBndrsIn :: [Var] -> VM a -> VM ([Var], [Var], a)
139 (vvs, lvs) <- mapAndUnzipM vectBndr vs
143 -- ----------------------------------------------------------------------------
146 capply :: (CoreExpr, CoreExpr) -> (CoreExpr, CoreExpr) -> VM (CoreExpr, CoreExpr)
147 capply (vfn, lfn) (varg, larg)
149 apply <- builtin applyClosureVar
150 applyP <- builtin applyClosurePVar
151 return (mkApps (Var apply) [Type arg_ty, Type res_ty, vfn, varg],
152 mkApps (Var applyP) [Type arg_ty, Type res_ty, lfn, larg])
155 (arg_ty, res_ty) = splitClosureTy fn_ty
157 vectVar :: CoreExpr -> Var -> VM (CoreExpr, CoreExpr)
162 Local es -> return es
164 lexpr <- replicatePA vexpr lc
165 return (vexpr, lexpr)
167 vectPolyVar :: CoreExpr -> Var -> [Type] -> VM (CoreExpr, CoreExpr)
172 Local (vexpr, lexpr) -> liftM2 (,) (mk_app vexpr) (mk_app lexpr)
175 lexpr <- replicatePA vexpr lc
176 return (vexpr, lexpr)
178 mk_app e = applyToTypes e =<< mapM vectType tys
180 vectPolyExpr :: CoreExpr -> CoreExprWithFVs -> VM (CoreExpr, CoreExpr)
183 . abstractOverTyVars tvs $ \mk_lams ->
184 -- FIXME: shadowing (tvs in lc)
186 (vmono, lmono) <- vectExpr lc mono
187 return $ (mk_lams vmono, mk_lams lmono)
189 (tvs, mono) = collectAnnTypeBinders expr
191 vectExpr :: CoreExpr -> CoreExprWithFVs -> VM (CoreExpr, CoreExpr)
192 vectExpr lc (_, AnnType ty)
195 return (Type vty, Type vty)
197 vectExpr lc (_, AnnVar v) = vectVar lc v
199 vectExpr lc (_, AnnLit lit)
202 lexpr <- replicatePA vexpr lc
203 return (vexpr, lexpr)
205 vectExpr lc (_, AnnNote note expr)
207 (vexpr, lexpr) <- vectExpr lc expr
208 return (Note note vexpr, Note note lexpr)
210 vectExpr lc e@(_, AnnApp _ arg)
212 = vectTyAppExpr lc fn tys
214 (fn, tys) = collectAnnTypeArgs e
216 vectExpr lc (_, AnnApp fn arg)
218 fn' <- vectExpr lc fn
219 arg' <- vectExpr lc arg
222 vectExpr lc (_, AnnCase expr bndr ty alts)
223 = panic "vectExpr: case"
225 vectExpr lc (_, AnnLet (AnnNonRec bndr rhs) body)
227 (vrhs, lrhs) <- vectPolyExpr lc rhs
228 (vbndr, lbndr, (vbody, lbody)) <- vectBndrIn bndr (vectExpr lc body)
229 return (Let (NonRec vbndr vrhs) vbody,
230 Let (NonRec lbndr lrhs) lbody)
232 vectExpr lc (_, AnnLet (AnnRec prs) body)
234 (vbndrs, lbndrs, (vrhss, vbody, lrhss, lbody)) <- vectBndrsIn bndrs vect
235 return (Let (Rec (zip vbndrs vrhss)) vbody,
236 Let (Rec (zip lbndrs lrhss)) lbody)
238 (bndrs, rhss) = unzip prs
241 (vrhss, lrhss) <- mapAndUnzipM (vectExpr lc) rhss
242 (vbody, lbody) <- vectPolyExpr lc body
243 return (vrhss, vbody, lrhss, lbody)
245 vectExpr lc e@(_, AnnLam bndr body)
246 | isTyVar bndr = pprPanic "vectExpr" (ppr $ deAnnotate e)
248 vectExpr lc (fvs, AnnLam bndr body)
250 tyvars <- localTyVars
251 info <- mkCEnvInfo fvs bndr body
252 (poly_vfn, poly_lfn) <- mkClosureFns info tyvars bndr body
254 vfn_var <- hoistExpr FSLIT("vfn") poly_vfn
255 lfn_var <- hoistExpr FSLIT("lfn") poly_lfn
257 let (venv, lenv) = mkClosureEnvs info lc
259 let env_ty = cenv_vty info
261 pa_dict <- paDictOfType env_ty
263 arg_ty <- vectType (varType bndr)
264 res_ty <- vectType (exprType $ deAnnotate body)
266 -- FIXME: move the functions to the top level
267 mono_vfn <- applyToTypes (Var vfn_var) (mkTyVarTys tyvars)
268 mono_lfn <- applyToTypes (Var lfn_var) (mkTyVarTys tyvars)
270 mk_clo <- builtin mkClosureVar
271 mk_cloP <- builtin mkClosurePVar
273 let vclo = Var mk_clo `mkTyApps` [arg_ty, res_ty, env_ty]
274 `mkApps` [pa_dict, mono_vfn, mono_lfn, venv]
276 lclo = Var mk_cloP `mkTyApps` [arg_ty, res_ty, env_ty]
277 `mkApps` [pa_dict, mono_vfn, mono_lfn, lenv]
282 data CEnvInfo = CEnvInfo {
284 , cenv_values :: [(CoreExpr, CoreExpr)]
287 , cenv_repr_tycon :: TyCon
288 , cenv_repr_tyargs :: [Type]
289 , cenv_repr_datacon :: DataCon
292 mkCEnvInfo :: VarSet -> Var -> CoreExprWithFVs -> VM CEnvInfo
293 mkCEnvInfo fvs arg body
295 locals <- readLEnv local_vars
298 [(var, val) | var <- varSetElems fvs
299 , Just val <- [lookupVarEnv locals var]]
300 vtys <- mapM (vectType . varType) vars
302 (vty, repr_tycon, repr_tyargs, repr_datacon) <- mk_env_ty vtys
303 lty <- mkPArrayType vty
310 , cenv_repr_tycon = repr_tycon
311 , cenv_repr_tyargs = repr_tyargs
312 , cenv_repr_datacon = repr_datacon
316 = return (vty, error "absent cinfo_repr_tycon"
317 , error "absent cinfo_repr_tyargs"
318 , error "absent cinfo_repr_datacon")
322 let ty = mkCoreTupTy vtys
323 (repr_tc, repr_tyargs) <- lookupPArrayFamInst ty
324 let [repr_con] = tyConDataCons repr_tc
325 return (ty, repr_tc, repr_tyargs, repr_con)
329 mkClosureEnvs :: CEnvInfo -> CoreExpr -> (CoreExpr, CoreExpr)
330 mkClosureEnvs info lc
332 = (Var unitDataConId, mkApps (Var $ dataConWrapId (cenv_repr_datacon info))
333 [lc, Var unitDataConId])
335 | [(vval, lval)] <- vals
339 = (mkCoreTup vvals, Var (dataConWrapId $ cenv_repr_datacon info)
340 `mkTyApps` cenv_repr_tyargs info
341 `mkApps` (lc : lvals))
344 vals = cenv_values info
345 (vvals, lvals) = unzip vals
347 mkClosureFns :: CEnvInfo -> [TyVar] -> Var -> CoreExprWithFVs
348 -> VM (CoreExpr, CoreExpr)
349 mkClosureFns info tyvars arg body
351 . abstractOverTyVars tyvars
354 (vfn, lfn) <- mkClosureMonoFns info arg body
355 return (mk_tlams vfn, mk_tlams lfn)
357 mkClosureMonoFns :: CEnvInfo -> Var -> CoreExprWithFVs -> VM (CoreExpr, CoreExpr)
358 mkClosureMonoFns info arg body
360 lc_bndr <- newLocalVar FSLIT("lc") intPrimTy
361 (varg : vbndrs, larg : lbndrs, (vbody, lbody))
362 <- vectBndrsIn (arg : cenv_vars info)
363 (vectExpr (Var lc_bndr) body)
365 venv_bndr <- newLocalVar FSLIT("env") vty
366 lenv_bndr <- newLocalVar FSLIT("env") lty
368 let vcase = bind_venv (Var venv_bndr) vbody vbndrs
369 lcase <- bind_lenv (Var lenv_bndr) lbody lc_bndr lbndrs
370 return (mkLams [venv_bndr, varg] vcase, mkLams [lenv_bndr, larg] lcase)
375 arity = length (cenv_vars info)
377 bind_venv venv vbody [] = vbody
378 bind_venv venv vbody [vbndr] = Let (NonRec vbndr venv) vbody
379 bind_venv venv vbody vbndrs
380 = Case venv (mkWildId vty) (exprType vbody)
381 [(DataAlt (tupleCon Boxed arity), vbndrs, vbody)]
383 bind_lenv lenv lbody lc_bndr [lbndr]
385 len <- lengthPA (Var lbndr)
386 return . Let (NonRec lbndr lenv)
390 [(DEFAULT, [], lbody)]
392 bind_lenv lenv lbody lc_bndr lbndrs
393 = let scrut = unwrapFamInstScrut (cenv_repr_tycon info)
394 (cenv_repr_tyargs info)
396 lbndrs' | null lbndrs = [mkWildId unitTy]
401 (mkWildId (exprType scrut))
403 [(DataAlt (cenv_repr_datacon info), lc_bndr : lbndrs', lbody)]
405 vectTyAppExpr :: CoreExpr -> CoreExprWithFVs -> [Type] -> VM (CoreExpr, CoreExpr)
406 vectTyAppExpr lc (_, AnnVar v) tys = vectPolyVar lc v tys
407 vectTyAppExpr lc e tys = pprPanic "vectTyAppExpr" (ppr $ deAnnotate e)