2 -- The above warning supression flag is a temporary kludge.
3 -- While working on this module you are encouraged to remove it and fix
4 -- any warnings in the module. See
5 -- http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings
8 module Vectorise( vectorise )
19 import CoreLint ( showPass, endPass )
23 import SimplMonad ( SimplCount, zeroSimplCount )
24 import Rules ( RuleBase )
28 import FamInstEnv ( extendFamInstEnvList )
29 import InstEnv ( extendInstEnvList )
33 import Name ( Name, mkSysTvName, getName )
36 import MkId ( unwrapFamInstScrut )
38 import Module ( Module )
40 import DsMonad hiding (mapAndUnzipM)
41 import DsUtils ( mkCoreTup, mkCoreTupTy )
43 import Literal ( Literal, mkMachInt )
46 import TysPrim ( intPrimTy )
47 import BasicTypes ( Boxity(..) )
51 import Control.Monad ( liftM, liftM2, zipWithM, mapAndUnzipM )
52 import Data.List ( sortBy, unzip4 )
54 vectorise :: HscEnv -> UniqSupply -> RuleBase -> ModGuts
55 -> IO (SimplCount, ModGuts)
56 vectorise hsc_env _ _ guts
58 showPass dflags "Vectorisation"
60 let info = hptVectInfo hsc_env `plusVectInfo` eps_vect_info eps
61 Just (info', guts') <- initV hsc_env guts info (vectModule guts)
62 endPass dflags "Vectorisation" Opt_D_dump_vect (mg_binds guts')
63 return (zeroSimplCount dflags, guts' { mg_vect_info = info' })
65 dflags = hsc_dflags hsc_env
67 vectModule :: ModGuts -> VM ModGuts
70 (types', fam_insts, tc_binds) <- vectTypeEnv (mg_types guts)
72 let fam_inst_env' = extendFamInstEnvList (mg_fam_inst_env guts) fam_insts
73 updGEnv (setFamInstEnv fam_inst_env')
75 -- dicts <- mapM buildPADict pa_insts
76 -- workers <- mapM vectDataConWorkers pa_insts
77 binds' <- mapM vectTopBind (mg_binds guts)
78 return $ guts { mg_types = types'
79 , mg_binds = Rec tc_binds : binds'
80 , mg_fam_inst_env = fam_inst_env'
81 , mg_fam_insts = mg_fam_insts guts ++ fam_insts
84 vectTopBind :: CoreBind -> VM CoreBind
85 vectTopBind b@(NonRec var expr)
87 var' <- vectTopBinder var
88 expr' <- vectTopRhs var expr
90 cexpr <- tryConvert var var' expr
91 return . Rec $ (var, cexpr) : (var', expr') : hs
95 vectTopBind b@(Rec bs)
97 vars' <- mapM vectTopBinder vars
98 exprs' <- zipWithM vectTopRhs vars exprs
100 cexprs <- sequence $ zipWith3 tryConvert vars vars' exprs
101 return . Rec $ zip vars cexprs ++ zip vars' exprs' ++ hs
105 (vars, exprs) = unzip bs
107 vectTopBinder :: Var -> VM Var
110 vty <- vectType (idType var)
111 var' <- cloneId mkVectOcc var vty
112 defGlobalVar var var'
115 vectTopRhs :: Var -> CoreExpr -> VM CoreExpr
118 closedV . liftM vectorised
120 $ vectPolyExpr (freeVars expr)
122 tryConvert :: Var -> Var -> CoreExpr -> VM CoreExpr
123 tryConvert var vect_var rhs
124 = fromVect (idType var) (Var vect_var) `orElseV` return rhs
126 -- ----------------------------------------------------------------------------
129 vectBndr :: Var -> VM VVar
132 vty <- vectType (idType v)
133 lty <- mkPArrayType vty
134 let vv = v `Id.setIdType` vty
135 lv = v `Id.setIdType` lty
136 updLEnv (mapTo vv lv)
139 mapTo vv lv env = env { local_vars = extendVarEnv (local_vars env) v (vv, lv) }
141 vectBndrNew :: Var -> FastString -> VM VVar
144 vty <- vectType (idType v)
145 vv <- newLocalVVar fs vty
149 upd vv env = env { local_vars = extendVarEnv (local_vars env) v vv }
151 vectBndrIn :: Var -> VM a -> VM (VVar, a)
159 vectBndrNewIn :: Var -> FastString -> VM a -> VM (VVar, a)
163 vv <- vectBndrNew v fs
167 vectBndrIn' :: Var -> (VVar -> VM a) -> VM (VVar, a)
175 vectBndrsIn :: [Var] -> VM a -> VM ([VVar], a)
179 vvs <- mapM vectBndr vs
183 -- ----------------------------------------------------------------------------
186 vectVar :: Var -> VM VExpr
191 Local (vv,lv) -> return (Var vv, Var lv)
194 lexpr <- liftPA vexpr
195 return (vexpr, lexpr)
197 vectPolyVar :: Var -> [Type] -> VM VExpr
200 vtys <- mapM vectType tys
203 Local (vv, lv) -> liftM2 (,) (polyApply (Var vv) vtys)
204 (polyApply (Var lv) vtys)
206 vexpr <- polyApply (Var poly) vtys
207 lexpr <- liftPA vexpr
208 return (vexpr, lexpr)
210 vectLiteral :: Literal -> VM VExpr
213 lexpr <- liftPA (Lit lit)
214 return (Lit lit, lexpr)
216 vectPolyExpr :: CoreExprWithFVs -> VM VExpr
217 vectPolyExpr (_, AnnNote note expr)
218 = liftM (vNote note) $ vectPolyExpr expr
220 = polyAbstract tvs $ \abstract ->
222 mono' <- vectExpr mono
223 return $ mapVect abstract mono'
225 (tvs, mono) = collectAnnTypeBinders expr
227 vectExpr :: CoreExprWithFVs -> VM VExpr
228 vectExpr (_, AnnType ty)
229 = liftM vType (vectType ty)
231 vectExpr (_, AnnVar v) = vectVar v
233 vectExpr (_, AnnLit lit) = vectLiteral lit
235 vectExpr (_, AnnNote note expr)
236 = liftM (vNote note) (vectExpr expr)
238 vectExpr e@(_, AnnApp _ arg)
240 = vectTyAppExpr fn tys
242 (fn, tys) = collectAnnTypeArgs e
244 vectExpr (_, AnnApp (_, AnnVar v) (_, AnnLit lit))
245 | Just con <- isDataConId_maybe v
248 let vexpr = App (Var v) (Lit lit)
249 lexpr <- liftPA vexpr
250 return (vexpr, lexpr)
252 is_special_con con = con `elem` [intDataCon, floatDataCon, doubleDataCon]
255 vectExpr (_, AnnApp fn arg)
257 arg_ty' <- vectType arg_ty
258 res_ty' <- vectType res_ty
261 mkClosureApp arg_ty' res_ty' fn' arg'
263 (arg_ty, res_ty) = splitFunTy . exprType $ deAnnotate fn
265 vectExpr (_, AnnCase scrut bndr ty alts)
266 | Just (tycon, ty_args) <- splitTyConApp_maybe scrut_ty
268 = vectAlgCase tycon ty_args scrut bndr ty alts
270 scrut_ty = exprType (deAnnotate scrut)
272 vectExpr (_, AnnCase expr bndr ty alts)
273 = panic "vectExpr: case"
275 vectExpr (_, AnnLet (AnnNonRec bndr rhs) body)
277 vrhs <- localV . inBind bndr $ vectPolyExpr rhs
278 (vbndr, vbody) <- vectBndrIn bndr (vectExpr body)
279 return $ vLet (vNonRec vbndr vrhs) vbody
281 vectExpr (_, AnnLet (AnnRec bs) body)
283 (vbndrs, (vrhss, vbody)) <- vectBndrsIn bndrs
285 (zipWithM vect_rhs bndrs rhss)
287 return $ vLet (vRec vbndrs vrhss) vbody
289 (bndrs, rhss) = unzip bs
291 vect_rhs bndr rhs = localV
295 vectExpr e@(fvs, AnnLam bndr _)
296 | not (isId bndr) = pprPanic "vectExpr" (ppr $ deAnnotate e)
297 | otherwise = vectLam fvs bs body
299 (bs,body) = collectAnnValBinders e
301 vectExpr e = pprPanic "vectExpr" (ppr $ deAnnotate e)
303 vectLam :: VarSet -> [Var] -> CoreExprWithFVs -> VM VExpr
306 tyvars <- localTyVars
307 (vs, vvs) <- readLEnv $ \env ->
308 unzip [(var, vv) | var <- varSetElems fvs
309 , Just vv <- [lookupVarEnv (local_vars env) var]]
311 arg_tys <- mapM (vectType . idType) bs
312 res_ty <- vectType (exprType $ deAnnotate body)
314 buildClosures tyvars vvs arg_tys res_ty
315 . hoistPolyVExpr tyvars
317 lc <- builtin liftingContext
318 (vbndrs, vbody) <- vectBndrsIn (vs ++ bs)
320 return $ vLams lc vbndrs vbody
322 vectTyAppExpr :: CoreExprWithFVs -> [Type] -> VM VExpr
323 vectTyAppExpr (_, AnnVar v) tys = vectPolyVar v tys
324 vectTyAppExpr e tys = pprPanic "vectTyAppExpr" (ppr $ deAnnotate e)
326 type CoreAltWithFVs = AnnAlt Id VarSet
330 -- case e :: t of v { ... }
334 -- V: let v' = e in case v' of _ { ... }
335 -- L: let v' = e in case v' `cast` ... of _ { ... }
337 -- When lifting, we have to do it this way because v must have the type
338 -- [:V(T):] but the scrutinee must be cast to the representation type. We also
339 -- have to handle the case where v is a wild var correctly.
342 -- FIXME: this is too lazy
343 vectAlgCase tycon ty_args scrut bndr ty [(DEFAULT, [], body)]
345 vscrut <- vectExpr scrut
347 lty <- mkPArrayType vty
348 (vbndr, vbody) <- vectBndrIn bndr (vectExpr body)
349 return $ vCaseDEFAULT vscrut vbndr vty lty vbody
351 vectAlgCase tycon ty_args scrut bndr ty [(DataAlt dc, [], body)]
353 vscrut <- vectExpr scrut
355 lty <- mkPArrayType vty
356 (vbndr, vbody) <- vectBndrIn bndr (vectExpr body)
357 return $ vCaseDEFAULT vscrut vbndr vty lty vbody
359 vectAlgCase tycon ty_args scrut bndr ty [(DataAlt dc, bndrs, body)]
361 vect_tc <- maybeV (lookupTyCon tycon)
363 lty <- mkPArrayType vty
364 vexpr <- vectExpr scrut
365 (vbndr, (vbndrs, vbody)) <- vect_scrut_bndr
369 (vscrut, arr_tc, arg_tys) <- mkVScrut (vVar vbndr)
370 vect_dc <- maybeV (lookupDataCon dc)
371 let [arr_dc] = tyConDataCons arr_tc
372 repr <- mkRepr vect_tc
373 shape_bndrs <- arrShapeVars repr
374 return . vLet (vNonRec vbndr vexpr)
375 $ vCaseProd vscrut vty lty vect_dc arr_dc shape_bndrs vbndrs vbody
377 vect_scrut_bndr | isDeadBinder bndr = vectBndrNewIn bndr (fsLit "scrut")
378 | otherwise = vectBndrIn bndr
380 vectAlgCase tycon ty_args scrut bndr ty alts
382 vect_tc <- maybeV (lookupTyCon tycon)
384 lty <- mkPArrayType vty
386 repr <- mkRepr vect_tc
387 shape_bndrs <- arrShapeVars repr
388 (len, sel, indices) <- arrSelector repr (map Var shape_bndrs)
390 (vbndr, valts) <- vect_scrut_bndr $ mapM (proc_alt sel vty lty) alts'
391 let (vect_dcs, vect_bndrss, lift_bndrss, vbodies) = unzip4 valts
393 vexpr <- vectExpr scrut
394 (vscrut, arr_tc, arg_tys) <- mkVScrut (vVar vbndr)
395 let [arr_dc] = tyConDataCons arr_tc
397 let (vect_scrut, lift_scrut) = vscrut
398 (vect_bodies, lift_bodies) = unzip vbodies
400 let vect_case = Case vect_scrut (mkWildId (exprType vect_scrut)) vty
401 (zipWith3 mk_vect_alt vect_dcs vect_bndrss vect_bodies)
403 lbody <- combinePA vty len sel indices lift_bodies
404 let lift_case = Case lift_scrut (mkWildId (exprType lift_scrut)) lty
405 [(DataAlt arr_dc, shape_bndrs ++ concat lift_bndrss,
408 return . vLet (vNonRec vbndr vexpr)
409 $ (vect_case, lift_case)
411 vect_scrut_bndr | isDeadBinder bndr = vectBndrNewIn bndr (fsLit "scrut")
412 | otherwise = vectBndrIn bndr
414 alts' = sortBy (\(alt1, _, _) (alt2, _, _) -> cmp alt1 alt2) alts
416 cmp (DataAlt dc1) (DataAlt dc2) = dataConTag dc1 `compare` dataConTag dc2
417 cmp DEFAULT DEFAULT = EQ
421 proc_alt sel vty lty (DataAlt dc, bndrs, body)
423 vect_dc <- maybeV (lookupDataCon dc)
424 let tag = mkDataConTag vect_dc
425 fvs = freeVarsOf body `delVarSetList` bndrs
426 (vect_bndrs, lift_bndrs, vbody)
427 <- vect_alt_bndrs bndrs
428 $ \len -> packLiftingContext len sel tag fvs vty lty
431 return (vect_dc, vect_bndrs, lift_bndrs, vbody)
435 void_tc <- builtin voidTyCon
436 let void_ty = mkTyConApp void_tc []
437 arr_ty <- mkPArrayType void_ty
438 bndr <- newLocalVar (fsLit "voids") arr_ty
439 len <- lengthPA void_ty (Var bndr)
441 return ([], [bndr], e)
443 vect_alt_bndrs bndrs p
446 vbndrs <- mapM vectBndr bndrs
447 let (vect_bndrs, lift_bndrs) = unzip vbndrs
450 len <- lengthPA (idType vv) (Var lv)
452 return (vect_bndrs, lift_bndrs, e)
454 mk_vect_alt vect_dc bndrs body = (DataAlt vect_dc, bndrs, body)
456 packLiftingContext :: CoreExpr -> CoreExpr -> CoreExpr -> VarSet
457 -> Type -> Type -> VM VExpr -> VM VExpr
458 packLiftingContext len shape tag fvs vty lty p
460 select <- builtin selectPAIntPrimVar
461 let sel_expr = mkApps (Var select) [shape, tag]
462 sel_var <- newLocalVar (fsLit "sel#") (exprType sel_expr)
463 lc_var <- builtin liftingContext
466 bnds <- mapM (packFreeVar (Var lc_var) (Var sel_var))
471 return (vexpr, Let (NonRec sel_var sel_expr)
472 $ Case len lc_var lty
473 [(DEFAULT, [], mkLets (concat bnds) lexpr),
474 (LitAlt (mkMachInt 0), [], empty)])
476 packFreeVar :: CoreExpr -> CoreExpr -> Var -> VM [CoreBind]
477 packFreeVar len sel v
484 expr <- packPA (idType vv) (Var lv) len sel
486 return [(NonRec lv' expr)]
490 upd vv lv' env = env { local_vars = extendVarEnv (local_vars env) v (vv, lv') }