+{-# OPTIONS -w #-}
+-- The above warning supression flag is a temporary kludge.
+-- While working on this module you are encouraged to remove it and fix
+-- any warnings in the module. See
+-- http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings
+-- for details
+
module Vectorise( vectorise )
where
import Id
import MkId ( unwrapFamInstScrut )
import OccName
-import RdrName ( RdrName, mkRdrQual )
-import Module ( mkModuleNameFS )
+import Module ( Module )
import DsMonad hiding (mapAndUnzipM)
import DsUtils ( mkCoreTup, mkCoreTupTy )
import Outputable
import FastString
import Control.Monad ( liftM, liftM2, zipWithM, mapAndUnzipM )
-
-mkNDPVar :: String -> RdrName
-mkNDPVar s = mkRdrQual nDP_BUILTIN (mkVarOcc s)
-
-mkNDPVarFS :: FastString -> RdrName
-mkNDPVarFS fs = mkRdrQual nDP_BUILTIN (mkVarOccFS fs)
-
-builtin_PAs :: [(Name, RdrName)]
-builtin_PAs = [
- mk closureTyConName FSLIT("dPA_Clo")
- , mk intTyConName FSLIT("dPA_Int")
- ]
- ++ tups
- where
- mk name fs = (name, mkNDPVarFS fs)
-
- tups = mk_tup 0 : map mk_tup [2..3]
- mk_tup n = (getName $ tupleTyCon Boxed n, mkNDPVar $ "dPA_" ++ show n)
+import Data.List ( sortBy, unzip4 )
vectorise :: HscEnv -> UniqSupply -> RuleBase -> ModGuts
-> IO (SimplCount, ModGuts)
vectModule :: ModGuts -> VM ModGuts
vectModule guts
= do
- defTyConRdrPAs builtin_PAs
(types', fam_insts, tc_binds) <- vectTypeEnv (mg_types guts)
let fam_inst_env' = extendFamInstEnvList (mg_fam_inst_env guts) fam_insts
var' <- vectTopBinder var
expr' <- vectTopRhs var expr
hs <- takeHoisted
- return . Rec $ (var, expr) : (var', expr') : hs
+ cexpr <- tryConvert var var' expr
+ return . Rec $ (var, cexpr) : (var', expr') : hs
`orElseV`
return b
vars' <- mapM vectTopBinder vars
exprs' <- zipWithM vectTopRhs vars exprs
hs <- takeHoisted
- return . Rec $ bs ++ zip vars' exprs' ++ hs
+ cexprs <- sequence $ zipWith3 tryConvert vars vars' exprs
+ return . Rec $ zip vars cexprs ++ zip vars' exprs' ++ hs
`orElseV`
return b
where
. inBind var
$ vectPolyExpr (freeVars expr)
+tryConvert :: Var -> Var -> CoreExpr -> VM CoreExpr
+tryConvert var vect_var rhs
+ = fromVect (idType var) (Var vect_var) `orElseV` return rhs
+
-- ----------------------------------------------------------------------------
-- Bindings
where
mapTo vv lv env = env { local_vars = extendVarEnv (local_vars env) v (vv, lv) }
+vectBndrNew :: Var -> FastString -> VM VVar
+vectBndrNew v fs
+ = do
+ vty <- vectType (idType v)
+ vv <- newLocalVVar fs vty
+ updLEnv (upd vv)
+ return vv
+ where
+ upd vv env = env { local_vars = extendVarEnv (local_vars env) v vv }
+
vectBndrIn :: Var -> VM a -> VM (VVar, a)
vectBndrIn v p
= localV
x <- p
return (vv, x)
+vectBndrNewIn :: Var -> FastString -> VM a -> VM (VVar, a)
+vectBndrNewIn v fs p
+ = localV
+ $ do
+ vv <- vectBndrNew v fs
+ x <- p
+ return (vv, x)
+
vectBndrIn' :: Var -> (VVar -> VM a) -> VM (VVar, a)
vectBndrIn' v p
= localV
return (Lit lit, lexpr)
vectPolyExpr :: CoreExprWithFVs -> VM VExpr
+vectPolyExpr (_, AnnNote note expr)
+ = liftM (vNote note) $ vectPolyExpr expr
vectPolyExpr expr
= polyAbstract tvs $ \abstract ->
do
vectExpr (_, AnnApp fn arg)
= do
- fn' <- vectExpr fn
- arg' <- vectExpr arg
- mkClosureApp fn' arg'
+ arg_ty' <- vectType arg_ty
+ res_ty' <- vectType res_ty
+ fn' <- vectExpr fn
+ arg' <- vectExpr arg
+ mkClosureApp arg_ty' res_ty' fn' arg'
+ where
+ (arg_ty, res_ty) = splitFunTy . exprType $ deAnnotate fn
vectExpr (_, AnnCase scrut bndr ty alts)
- | isAlgType scrut_ty
- = vectAlgCase scrut bndr ty alts
+ | Just (tycon, ty_args) <- splitTyConApp_maybe scrut_ty
+ , isAlgTyCon tycon
+ = vectAlgCase tycon ty_args scrut bndr ty alts
where
scrut_ty = exprType (deAnnotate scrut)
--
-- to
--
--- V: let v = e in case v of _ { ... }
--- L: let v = e in case v `cast` ... of _ { ... }
+-- V: let v' = e in case v' of _ { ... }
+-- L: let v' = e in case v' `cast` ... of _ { ... }
--
-- When lifting, we have to do it this way because v must have the type
--- [:V(T):] but the scrutinee must be cast to the representation type.
+-- [:V(T):] but the scrutinee must be cast to the representation type. We also
+-- have to handle the case where v is a wild var correctly.
--
-- FIXME: this is too lazy
-vectAlgCase scrut bndr ty [(DEFAULT, [], body)]
+vectAlgCase tycon ty_args scrut bndr ty [(DEFAULT, [], body)]
= do
vscrut <- vectExpr scrut
vty <- vectType ty
(vbndr, vbody) <- vectBndrIn bndr (vectExpr body)
return $ vCaseDEFAULT vscrut vbndr vty lty vbody
-vectAlgCase scrut bndr ty [(DataAlt dc, bndrs, body)]
+vectAlgCase tycon ty_args scrut bndr ty [(DataAlt dc, bndrs, body)]
= do
+ vect_tc <- maybeV (lookupTyCon tycon)
vty <- vectType ty
lty <- mkPArrayType vty
vexpr <- vectExpr scrut
- (vbndr, (vbndrs, vbody)) <- vectBndrIn bndr
+ (vbndr, (vbndrs, vbody)) <- vect_scrut_bndr
. vectBndrsIn bndrs
$ vectExpr body
(vscrut, arr_tc, arg_tys) <- mkVScrut (vVar vbndr)
vect_dc <- maybeV (lookupDataCon dc)
let [arr_dc] = tyConDataCons arr_tc
- let shape_tys = take (dataConRepArity arr_dc - length bndrs)
- (dataConRepArgTys arr_dc)
- shape_bndrs <- mapM (newLocalVar FSLIT("s")) shape_tys
+ repr <- mkRepr vect_tc
+ shape_bndrs <- arrShapeVars repr
return . vLet (vNonRec vbndr vexpr)
$ vCaseProd vscrut vty lty vect_dc arr_dc shape_bndrs vbndrs vbody
+ where
+ vect_scrut_bndr | isDeadBinder bndr = vectBndrNewIn bndr FSLIT("scrut")
+ | otherwise = vectBndrIn bndr
+
+vectAlgCase tycon ty_args scrut bndr ty alts
+ = do
+ vect_tc <- maybeV (lookupTyCon tycon)
+ vty <- vectType ty
+ lty <- mkPArrayType vty
+
+ repr <- mkRepr vect_tc
+ shape_bndrs <- arrShapeVars repr
+ (len, sel, indices) <- arrSelector repr (map Var shape_bndrs)
+
+ (vbndr, valts) <- vect_scrut_bndr $ mapM (proc_alt sel lty) alts'
+ let (vect_dcs, vect_bndrss, lift_bndrss, vbodies) = unzip4 valts
+
+ vexpr <- vectExpr scrut
+ (vscrut, arr_tc, arg_tys) <- mkVScrut (vVar vbndr)
+ let [arr_dc] = tyConDataCons arr_tc
+
+ let (vect_scrut, lift_scrut) = vscrut
+ (vect_bodies, lift_bodies) = unzip vbodies
+
+ let vect_case = Case vect_scrut (mkWildId (exprType vect_scrut)) vty
+ (zipWith3 mk_vect_alt vect_dcs vect_bndrss vect_bodies)
+
+ lbody <- combinePA vty len sel indices lift_bodies
+ let lift_case = Case lift_scrut (mkWildId (exprType lift_scrut)) lty
+ [(DataAlt arr_dc, shape_bndrs ++ concat lift_bndrss,
+ lbody)]
+
+ return . vLet (vNonRec vbndr vexpr)
+ $ (vect_case, lift_case)
+ where
+ vect_scrut_bndr | isDeadBinder bndr = vectBndrNewIn bndr FSLIT("scrut")
+ | otherwise = vectBndrIn bndr
+
+ alts' = sortBy (\(alt1, _, _) (alt2, _, _) -> cmp alt1 alt2) alts
+
+ cmp (DataAlt dc1) (DataAlt dc2) = dataConTag dc1 `compare` dataConTag dc2
+ cmp DEFAULT DEFAULT = EQ
+ cmp DEFAULT _ = LT
+ cmp _ DEFAULT = GT
+
+ proc_alt sel lty (DataAlt dc, bndrs, body)
+ = do
+ vect_dc <- maybeV (lookupDataCon dc)
+ let tag = mkDataConTag vect_dc
+ fvs = freeVarsOf body `delVarSetList` bndrs
+ (vect_bndrs, lift_bndrs, vbody)
+ <- vect_alt_bndrs bndrs
+ $ \len -> packLiftingContext len sel tag fvs lty
+ $ vectExpr body
+
+ return (vect_dc, vect_bndrs, lift_bndrs, vbody)
+
+ vect_alt_bndrs [] p
+ = do
+ void_tc <- builtin voidTyCon
+ let void_ty = mkTyConApp void_tc []
+ arr_ty <- mkPArrayType void_ty
+ bndr <- newLocalVar FSLIT("voids") arr_ty
+ len <- lengthPA void_ty (Var bndr)
+ e <- p len
+ return ([], [bndr], e)
+
+ vect_alt_bndrs bndrs p
+ = localV
+ $ do
+ vbndrs <- mapM vectBndr bndrs
+ let (vect_bndrs, lift_bndrs) = unzip vbndrs
+ vv : _ = vect_bndrs
+ lv : _ = lift_bndrs
+ len <- lengthPA (idType vv) (Var lv)
+ e <- p len
+ return (vect_bndrs, lift_bndrs, e)
+
+ mk_vect_alt vect_dc bndrs body = (DataAlt vect_dc, bndrs, body)
+
+packLiftingContext :: CoreExpr -> CoreExpr -> CoreExpr -> VarSet -> Type -> VM VExpr -> VM VExpr
+packLiftingContext len shape tag fvs res_ty p
+ = do
+ select <- builtin selectPAIntPrimVar
+ let sel_expr = mkApps (Var select) [shape, tag]
+ sel_var <- newLocalVar FSLIT("sel#") (exprType sel_expr)
+ lc_var <- builtin liftingContext
+ localV $
+ do
+ bnds <- mapM (packFreeVar (Var lc_var) (Var sel_var))
+ . filter isLocalId
+ $ varSetElems fvs
+ (vexpr, lexpr) <- p
+ return (vexpr, Let (NonRec sel_var sel_expr)
+ . mkLets (concat bnds)
+ $ Case len lc_var res_ty [(DEFAULT, [], lexpr)])
+
+packFreeVar :: CoreExpr -> CoreExpr -> Var -> VM [CoreBind]
+packFreeVar len sel v
+ = do
+ r <- lookupVar v
+ case r of
+ Local (vv,lv) ->
+ do
+ lv' <- cloneVar lv
+ expr <- packPA (idType vv) (Var lv) len sel
+ updLEnv (upd vv lv')
+ return [(NonRec lv' expr)]
+
+ _ -> return []
+ where
+ upd vv lv' env = env { local_vars = extendVarEnv (local_vars env) v (vv, lv') }
+