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 )
11 #include "HsVersions.h"
21 import CoreLint ( showPass, endPass )
25 import SimplMonad ( SimplCount, zeroSimplCount )
26 import Rules ( RuleBase )
30 import FamInstEnv ( extendFamInstEnvList )
31 import InstEnv ( extendInstEnvList )
35 import Name ( Name, mkSysTvName, getName )
38 import MkId ( unwrapFamInstScrut )
40 import Module ( Module )
42 import DsMonad hiding (mapAndUnzipM)
43 import DsUtils ( mkCoreTup, mkCoreTupTy )
45 import Literal ( Literal )
48 import TysPrim ( intPrimTy )
49 import BasicTypes ( Boxity(..) )
53 import Control.Monad ( liftM, liftM2, zipWithM, mapAndUnzipM )
54 import Data.List ( sortBy, unzip4 )
56 vectorise :: HscEnv -> UniqSupply -> RuleBase -> ModGuts
57 -> IO (SimplCount, ModGuts)
58 vectorise hsc_env _ _ guts
60 showPass dflags "Vectorisation"
62 let info = hptVectInfo hsc_env `plusVectInfo` eps_vect_info eps
63 Just (info', guts') <- initV hsc_env guts info (vectModule guts)
64 endPass dflags "Vectorisation" Opt_D_dump_vect (mg_binds guts')
65 return (zeroSimplCount dflags, guts' { mg_vect_info = info' })
67 dflags = hsc_dflags hsc_env
69 vectModule :: ModGuts -> VM ModGuts
72 (types', fam_insts, tc_binds) <- vectTypeEnv (mg_types guts)
74 let fam_inst_env' = extendFamInstEnvList (mg_fam_inst_env guts) fam_insts
75 updGEnv (setFamInstEnv fam_inst_env')
77 -- dicts <- mapM buildPADict pa_insts
78 -- workers <- mapM vectDataConWorkers pa_insts
79 binds' <- mapM vectTopBind (mg_binds guts)
80 return $ guts { mg_types = types'
81 , mg_binds = Rec tc_binds : binds'
82 , mg_fam_inst_env = fam_inst_env'
83 , mg_fam_insts = mg_fam_insts guts ++ fam_insts
86 vectTopBind :: CoreBind -> VM CoreBind
87 vectTopBind b@(NonRec var expr)
89 var' <- vectTopBinder var
90 expr' <- vectTopRhs var expr
92 cexpr <- tryConvert var var' expr
93 return . Rec $ (var, cexpr) : (var', expr') : hs
97 vectTopBind b@(Rec bs)
99 vars' <- mapM vectTopBinder vars
100 exprs' <- zipWithM vectTopRhs vars exprs
102 cexprs <- sequence $ zipWith3 tryConvert vars vars' exprs
103 return . Rec $ zip vars cexprs ++ zip vars' exprs' ++ hs
107 (vars, exprs) = unzip bs
109 vectTopBinder :: Var -> VM Var
112 vty <- vectType (idType var)
113 var' <- cloneId mkVectOcc var vty
114 defGlobalVar var var'
117 vectTopRhs :: Var -> CoreExpr -> VM CoreExpr
120 closedV . liftM vectorised
122 $ vectPolyExpr (freeVars expr)
124 tryConvert :: Var -> Var -> CoreExpr -> VM CoreExpr
125 tryConvert var vect_var rhs
126 = fromVect (idType var) (Var vect_var) `orElseV` return rhs
128 -- ----------------------------------------------------------------------------
131 vectBndr :: Var -> VM VVar
134 vty <- vectType (idType v)
135 lty <- mkPArrayType vty
136 let vv = v `Id.setIdType` vty
137 lv = v `Id.setIdType` lty
138 updLEnv (mapTo vv lv)
141 mapTo vv lv env = env { local_vars = extendVarEnv (local_vars env) v (vv, lv) }
143 vectBndrNew :: Var -> FastString -> VM VVar
146 vty <- vectType (idType v)
147 vv <- newLocalVVar fs vty
151 upd vv env = env { local_vars = extendVarEnv (local_vars env) v vv }
153 vectBndrIn :: Var -> VM a -> VM (VVar, a)
161 vectBndrNewIn :: Var -> FastString -> VM a -> VM (VVar, a)
165 vv <- vectBndrNew v fs
169 vectBndrIn' :: Var -> (VVar -> VM a) -> VM (VVar, a)
177 vectBndrsIn :: [Var] -> VM a -> VM ([VVar], a)
181 vvs <- mapM vectBndr vs
185 -- ----------------------------------------------------------------------------
188 vectVar :: Var -> VM VExpr
193 Local (vv,lv) -> return (Var vv, Var lv)
196 lexpr <- liftPA vexpr
197 return (vexpr, lexpr)
199 vectPolyVar :: Var -> [Type] -> VM VExpr
202 vtys <- mapM vectType tys
205 Local (vv, lv) -> liftM2 (,) (polyApply (Var vv) vtys)
206 (polyApply (Var lv) vtys)
208 vexpr <- polyApply (Var poly) vtys
209 lexpr <- liftPA vexpr
210 return (vexpr, lexpr)
212 vectLiteral :: Literal -> VM VExpr
215 lexpr <- liftPA (Lit lit)
216 return (Lit lit, lexpr)
218 vectPolyExpr :: CoreExprWithFVs -> VM VExpr
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 fn arg)
246 arg_ty' <- vectType arg_ty
247 res_ty' <- vectType res_ty
250 mkClosureApp arg_ty' res_ty' fn' arg'
252 (arg_ty, res_ty) = splitFunTy . exprType $ deAnnotate fn
254 vectExpr (_, AnnCase scrut bndr ty alts)
255 | Just (tycon, ty_args) <- splitTyConApp_maybe scrut_ty
257 = vectAlgCase tycon ty_args scrut bndr ty alts
259 scrut_ty = exprType (deAnnotate scrut)
261 vectExpr (_, AnnCase expr bndr ty alts)
262 = panic "vectExpr: case"
264 vectExpr (_, AnnLet (AnnNonRec bndr rhs) body)
266 vrhs <- localV . inBind bndr $ vectPolyExpr rhs
267 (vbndr, vbody) <- vectBndrIn bndr (vectExpr body)
268 return $ vLet (vNonRec vbndr vrhs) vbody
270 vectExpr (_, AnnLet (AnnRec bs) body)
272 (vbndrs, (vrhss, vbody)) <- vectBndrsIn bndrs
274 (zipWithM vect_rhs bndrs rhss)
276 return $ vLet (vRec vbndrs vrhss) vbody
278 (bndrs, rhss) = unzip bs
280 vect_rhs bndr rhs = localV
284 vectExpr e@(fvs, AnnLam bndr _)
285 | not (isId bndr) = pprPanic "vectExpr" (ppr $ deAnnotate e)
286 | otherwise = vectLam fvs bs body
288 (bs,body) = collectAnnValBinders e
290 vectLam :: VarSet -> [Var] -> CoreExprWithFVs -> VM VExpr
293 tyvars <- localTyVars
294 (vs, vvs) <- readLEnv $ \env ->
295 unzip [(var, vv) | var <- varSetElems fvs
296 , Just vv <- [lookupVarEnv (local_vars env) var]]
298 arg_tys <- mapM (vectType . idType) bs
299 res_ty <- vectType (exprType $ deAnnotate body)
301 buildClosures tyvars vvs arg_tys res_ty
302 . hoistPolyVExpr tyvars
304 lc <- builtin liftingContext
305 (vbndrs, vbody) <- vectBndrsIn (vs ++ bs)
307 return $ vLams lc vbndrs vbody
309 vectTyAppExpr :: CoreExprWithFVs -> [Type] -> VM VExpr
310 vectTyAppExpr (_, AnnVar v) tys = vectPolyVar v tys
311 vectTyAppExpr e tys = pprPanic "vectTyAppExpr" (ppr $ deAnnotate e)
313 type CoreAltWithFVs = AnnAlt Id VarSet
317 -- case e :: t of v { ... }
321 -- V: let v' = e in case v' of _ { ... }
322 -- L: let v' = e in case v' `cast` ... of _ { ... }
324 -- When lifting, we have to do it this way because v must have the type
325 -- [:V(T):] but the scrutinee must be cast to the representation type. We also
326 -- have to handle the case where v is a wild var correctly.
329 -- FIXME: this is too lazy
330 vectAlgCase tycon ty_args scrut bndr ty [(DEFAULT, [], body)]
332 vscrut <- vectExpr scrut
334 lty <- mkPArrayType vty
335 (vbndr, vbody) <- vectBndrIn bndr (vectExpr body)
336 return $ vCaseDEFAULT vscrut vbndr vty lty vbody
338 vectAlgCase tycon ty_args scrut bndr ty [(DataAlt dc, bndrs, body)]
340 vect_tc <- maybeV (lookupTyCon tycon)
342 lty <- mkPArrayType vty
343 vexpr <- vectExpr scrut
344 (vbndr, (vbndrs, vbody)) <- vect_scrut_bndr
348 (vscrut, arr_tc, arg_tys) <- mkVScrut (vVar vbndr)
349 vect_dc <- maybeV (lookupDataCon dc)
350 let [arr_dc] = tyConDataCons arr_tc
351 repr <- mkRepr vect_tc
352 shape_bndrs <- arrShapeVars repr
353 return . vLet (vNonRec vbndr vexpr)
354 $ vCaseProd vscrut vty lty vect_dc arr_dc shape_bndrs vbndrs vbody
356 vect_scrut_bndr | isDeadBinder bndr = vectBndrNewIn bndr FSLIT("scrut")
357 | otherwise = vectBndrIn bndr
359 vectAlgCase tycon ty_args scrut bndr ty alts
361 vect_tc <- maybeV (lookupTyCon tycon)
363 lty <- mkPArrayType vty
365 repr <- mkRepr vect_tc
366 shape_bndrs <- arrShapeVars repr
367 (len, sel, indices) <- arrSelector repr (map Var shape_bndrs)
369 (vbndr, valts) <- vect_scrut_bndr $ mapM (proc_alt sel lty) alts'
370 let (vect_dcs, vect_bndrss, lift_bndrss, vbodies) = unzip4 valts
372 vexpr <- vectExpr scrut
373 (vscrut, arr_tc, arg_tys) <- mkVScrut (vVar vbndr)
374 let [arr_dc] = tyConDataCons arr_tc
376 let (vect_scrut, lift_scrut) = vscrut
377 (vect_bodies, lift_bodies) = unzip vbodies
379 let vect_case = Case vect_scrut (mkWildId (exprType vect_scrut)) vty
380 (zipWith3 mk_vect_alt vect_dcs vect_bndrss vect_bodies)
382 lbody <- combinePA vty len sel indices lift_bodies
383 let lift_case = Case lift_scrut (mkWildId (exprType lift_scrut)) lty
384 [(DataAlt arr_dc, shape_bndrs ++ concat lift_bndrss,
387 return . vLet (vNonRec vbndr vexpr)
388 $ (vect_case, lift_case)
390 vect_scrut_bndr | isDeadBinder bndr = vectBndrNewIn bndr FSLIT("scrut")
391 | otherwise = vectBndrIn bndr
393 alts' = sortBy (\(alt1, _, _) (alt2, _, _) -> cmp alt1 alt2) alts
395 cmp (DataAlt dc1) (DataAlt dc2) = dataConTag dc1 `compare` dataConTag dc2
396 cmp DEFAULT DEFAULT = EQ
400 proc_alt sel lty (DataAlt dc, bndrs, body)
402 vect_dc <- maybeV (lookupDataCon dc)
403 let tag = mkDataConTag vect_dc
404 fvs = freeVarsOf body `delVarSetList` bndrs
405 (vect_bndrs, lift_bndrs, vbody)
406 <- vect_alt_bndrs bndrs
407 $ \len -> packLiftingContext len sel tag fvs lty
410 return (vect_dc, vect_bndrs, lift_bndrs, vbody)
414 void_tc <- builtin voidTyCon
415 let void_ty = mkTyConApp void_tc []
416 arr_ty <- mkPArrayType void_ty
417 bndr <- newLocalVar FSLIT("voids") arr_ty
418 len <- lengthPA void_ty (Var bndr)
420 return ([], [bndr], e)
422 vect_alt_bndrs bndrs p
425 vbndrs <- mapM vectBndr bndrs
426 let (vect_bndrs, lift_bndrs) = unzip vbndrs
429 len <- lengthPA (idType vv) (Var lv)
431 return (vect_bndrs, lift_bndrs, e)
433 mk_vect_alt vect_dc bndrs body = (DataAlt vect_dc, bndrs, body)
435 packLiftingContext :: CoreExpr -> CoreExpr -> CoreExpr -> VarSet -> Type -> VM VExpr -> VM VExpr
436 packLiftingContext len shape tag fvs res_ty p
438 select <- builtin selectPAIntPrimVar
439 let sel_expr = mkApps (Var select) [shape, tag]
440 sel_var <- newLocalVar FSLIT("sel#") (exprType sel_expr)
441 lc_var <- builtin liftingContext
444 bnds <- mapM (packFreeVar (Var lc_var) (Var sel_var))
448 return (vexpr, Let (NonRec sel_var sel_expr)
449 $ Case len lc_var res_ty [(DEFAULT, [], lexpr)])
451 packFreeVar :: CoreExpr -> CoreExpr -> Var -> VM [CoreBind]
452 packFreeVar len sel v
459 expr <- packPA (idType vv) (Var lv) len sel
461 return [(NonRec lv' expr)]
465 upd vv lv' env = env { local_vars = extendVarEnv (local_vars env) v (vv, lv') }