+
module Vectorise( vectorise )
where
-#include "HsVersions.h"
+import VectMonad
+import VectUtils
+import VectType
+import VectCore
import DynFlags
import HscTypes
import CoreLint ( showPass, endPass )
import CoreSyn
+import CoreUtils
+import CoreFVs
+import SimplMonad ( SimplCount, zeroSimplCount )
+import Rules ( RuleBase )
+import DataCon
import TyCon
import Type
-import TypeRep
+import FamInstEnv ( extendFamInstEnvList )
import Var
import VarEnv
-import Name ( mkSysTvName )
-import NameEnv
+import VarSet
+import Id
+import OccName
import DsMonad
-import PrelNames
+import Literal ( Literal, mkMachInt )
+import TysWiredIn
import Outputable
import FastString
-import Control.Monad ( liftM2 )
+import Control.Monad ( liftM, liftM2, zipWithM )
+import Data.List ( sortBy, unzip4 )
-vectorise :: HscEnv -> ModGuts -> IO ModGuts
-vectorise hsc_env guts
- | not (Opt_Vectorise `dopt` dflags) = return guts
- | otherwise
+vectorise :: HscEnv -> UniqSupply -> RuleBase -> ModGuts
+ -> IO (SimplCount, ModGuts)
+vectorise hsc_env _ _ guts
= do
showPass dflags "Vectorisation"
eps <- hscEPS hsc_env
let info = hptVectInfo hsc_env `plusVectInfo` eps_vect_info eps
- Just guts' <- initDs hsc_env (mg_module guts)
- (mg_rdr_env guts)
- (mg_types guts)
- (vectoriseModule info guts)
+ Just (info', guts') <- initV hsc_env guts info (vectModule guts)
endPass dflags "Vectorisation" Opt_D_dump_vect (mg_binds guts')
- return guts'
+ return (zeroSimplCount dflags, guts' { mg_vect_info = info' })
where
dflags = hsc_dflags hsc_env
--- ----------------------------------------------------------------------------
--- Vectorisation monad
-
-data Builtins = Builtins {
- parrayTyCon :: TyCon
- , paTyCon :: TyCon
- , closureTyCon :: TyCon
- , mkClosureVar :: Var
- , applyClosureVar :: Var
- , mkClosurePVar :: Var
- , applyClosurePVar :: Var
- , closurePAVar :: Var
- , lengthPAVar :: Var
- , replicatePAVar :: Var
- }
-
-initBuiltins :: DsM Builtins
-initBuiltins
+vectModule :: ModGuts -> VM ModGuts
+vectModule guts
+ = do
+ (types', fam_insts, tc_binds) <- vectTypeEnv (mg_types guts)
+
+ let fam_inst_env' = extendFamInstEnvList (mg_fam_inst_env guts) fam_insts
+ updGEnv (setFamInstEnv fam_inst_env')
+
+ -- dicts <- mapM buildPADict pa_insts
+ -- workers <- mapM vectDataConWorkers pa_insts
+ binds' <- mapM vectTopBind (mg_binds guts)
+ return $ guts { mg_types = types'
+ , mg_binds = Rec tc_binds : binds'
+ , mg_fam_inst_env = fam_inst_env'
+ , mg_fam_insts = mg_fam_insts guts ++ fam_insts
+ }
+
+vectTopBind :: CoreBind -> VM CoreBind
+vectTopBind b@(NonRec var expr)
= do
- parrayTyCon <- dsLookupTyCon parrayTyConName
- paTyCon <- dsLookupTyCon paTyConName
- closureTyCon <- dsLookupTyCon closureTyConName
-
- mkClosureVar <- dsLookupGlobalId mkClosureName
- applyClosureVar <- dsLookupGlobalId applyClosureName
- mkClosurePVar <- dsLookupGlobalId mkClosurePName
- applyClosurePVar <- dsLookupGlobalId applyClosurePName
- closurePAVar <- dsLookupGlobalId closurePAName
- lengthPAVar <- dsLookupGlobalId lengthPAName
- replicatePAVar <- dsLookupGlobalId replicatePAName
-
- return $ Builtins {
- parrayTyCon = parrayTyCon
- , paTyCon = paTyCon
- , closureTyCon = closureTyCon
- , mkClosureVar = mkClosureVar
- , applyClosureVar = applyClosureVar
- , mkClosurePVar = mkClosurePVar
- , applyClosurePVar = applyClosurePVar
- , closurePAVar = closurePAVar
- , lengthPAVar = lengthPAVar
- , replicatePAVar = replicatePAVar
- }
-
-data VEnv = VEnv {
- -- Mapping from global variables to their vectorised versions.
- --
- vect_global_vars :: VarEnv CoreExpr
-
- -- Mapping from local variables to their vectorised and lifted
- -- versions.
- --
- , vect_local_vars :: VarEnv (CoreExpr, CoreExpr)
-
- -- Exported variables which have a vectorised version
- --
- , vect_exported_vars :: VarEnv (Var, Var)
-
- -- Mapping from TyCons to their vectorised versions.
- -- TyCons which do not have to be vectorised are mapped to
- -- themselves.
- --
- , vect_tycons :: NameEnv TyCon
-
- -- Mapping from TyCons to their PA dictionaries
- --
- , vect_tycon_pa :: NameEnv CoreExpr
-
- -- Mapping from tyvars to their PA dictionaries
- --
- , vect_tyvar_pa :: VarEnv CoreExpr
- }
-
-initVEnv :: VectInfo -> DsM VEnv
-initVEnv info
- = return $ VEnv {
- vect_global_vars = mapVarEnv (Var . snd) $ vectInfoCCVar info
- , vect_local_vars = emptyVarEnv
- , vect_exported_vars = emptyVarEnv
- , vect_tycons = mapNameEnv snd $ vectInfoCCTyCon info
- , vect_tycon_pa = emptyNameEnv
- , vect_tyvar_pa = emptyVarEnv
- }
-
--- FIXME
-updVectInfo :: VEnv -> ModGuts -> ModGuts
-updVectInfo env guts = guts { mg_vect_info = info' }
+ var' <- vectTopBinder var
+ expr' <- vectTopRhs var expr
+ hs <- takeHoisted
+ cexpr <- tryConvert var var' expr
+ return . Rec $ (var, cexpr) : (var', expr') : hs
+ `orElseV`
+ return b
+
+vectTopBind b@(Rec bs)
+ = do
+ vars' <- mapM vectTopBinder vars
+ exprs' <- zipWithM vectTopRhs vars exprs
+ hs <- takeHoisted
+ cexprs <- sequence $ zipWith3 tryConvert vars vars' exprs
+ return . Rec $ zip vars cexprs ++ zip vars' exprs' ++ hs
+ `orElseV`
+ return b
where
- info' = info {
- vectInfoCCVar = vect_exported_vars env
- , vectInfoCCTyCon = tc_env
- }
+ (vars, exprs) = unzip bs
- info = mg_vect_info guts
- tyenv = mg_types guts
+vectTopBinder :: Var -> VM Var
+vectTopBinder var
+ = do
+ vty <- vectType (idType var)
+ var' <- cloneId mkVectOcc var vty
+ defGlobalVar var var'
+ return var'
- tc_env = mkNameEnv [(tc_name, (tc,tc')) | tc <- typeEnvTyCons tyenv
- , let tc_name = tyConName tc
- , Just tc' <- [lookupNameEnv (vect_tycons env) tc_name]]
+vectTopRhs :: Var -> CoreExpr -> VM CoreExpr
+vectTopRhs var expr
+ = do
+ closedV . liftM vectorised
+ . inBind var
+ $ vectPolyExpr (freeVars expr)
-data VResult a = Yes VEnv a | No
+tryConvert :: Var -> Var -> CoreExpr -> VM CoreExpr
+tryConvert var vect_var rhs
+ = fromVect (idType var) (Var vect_var) `orElseV` return rhs
-newtype VM a = VM { runVM :: Builtins -> VEnv -> DsM (VResult a) }
+-- ----------------------------------------------------------------------------
+-- Bindings
-instance Monad VM where
- return x = VM $ \bi env -> return (Yes env x)
- VM p >>= f = VM $ \bi env -> do
- r <- p bi env
- case r of
- Yes env' x -> runVM (f x) bi env'
- No -> return No
+vectBndr :: Var -> VM VVar
+vectBndr v
+ = do
+ (vty, lty) <- vectAndLiftType (idType v)
+ let vv = v `Id.setIdType` vty
+ lv = v `Id.setIdType` lty
+ updLEnv (mapTo vv lv)
+ return (vv, lv)
+ where
+ mapTo vv lv env = env { local_vars = extendVarEnv (local_vars env) v (vv, lv) }
-noV :: VM a
-noV = VM $ \bi env -> return No
+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
+ $ do
+ vv <- vectBndr v
+ 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)
+
+vectBndrsIn :: [Var] -> VM a -> VM ([VVar], a)
+vectBndrsIn vs p
+ = localV
+ $ do
+ vvs <- mapM vectBndr vs
+ x <- p
+ return (vvs, x)
-tryV :: VM a -> VM (Maybe a)
-tryV (VM p) = VM $ \bi env -> do
- r <- p bi env
- case r of
- Yes env' x -> return (Yes env' (Just x))
- No -> return (Yes env Nothing)
+-- ----------------------------------------------------------------------------
+-- Expressions
+
+vectVar :: Var -> VM VExpr
+vectVar v
+ = do
+ r <- lookupVar v
+ case r of
+ Local (vv,lv) -> return (Var vv, Var lv)
+ Global vv -> do
+ let vexpr = Var vv
+ lexpr <- liftPA vexpr
+ return (vexpr, lexpr)
+
+vectPolyVar :: Var -> [Type] -> VM VExpr
+vectPolyVar v tys
+ = do
+ vtys <- mapM vectType tys
+ r <- lookupVar v
+ case r of
+ Local (vv, lv) -> liftM2 (,) (polyApply (Var vv) vtys)
+ (polyApply (Var lv) vtys)
+ Global poly -> do
+ vexpr <- polyApply (Var poly) vtys
+ lexpr <- liftPA vexpr
+ return (vexpr, lexpr)
+
+vectLiteral :: Literal -> VM VExpr
+vectLiteral lit
+ = do
+ lexpr <- liftPA (Lit lit)
+ return (Lit lit, lexpr)
+
+vectPolyExpr :: CoreExprWithFVs -> VM VExpr
+vectPolyExpr (_, AnnNote note expr)
+ = liftM (vNote note) $ vectPolyExpr expr
+vectPolyExpr expr
+ = polyAbstract tvs $ \abstract ->
+ do
+ mono' <- vectExpr mono
+ return $ mapVect abstract mono'
+ where
+ (tvs, mono) = collectAnnTypeBinders expr
-maybeV :: VM (Maybe a) -> VM a
-maybeV p = maybe noV return =<< p
+vectExpr :: CoreExprWithFVs -> VM VExpr
+vectExpr (_, AnnType ty)
+ = liftM vType (vectType ty)
-orElseV :: VM a -> VM a -> VM a
-orElseV p q = maybe q return =<< tryV p
+vectExpr (_, AnnVar v) = vectVar v
-liftDs :: DsM a -> VM a
-liftDs p = VM $ \bi env -> do { x <- p; return (Yes env x) }
+vectExpr (_, AnnLit lit) = vectLiteral lit
-builtin :: (Builtins -> a) -> VM a
-builtin f = VM $ \bi env -> return (Yes env (f bi))
+vectExpr (_, AnnNote note expr)
+ = liftM (vNote note) (vectExpr expr)
-readEnv :: (VEnv -> a) -> VM a
-readEnv f = VM $ \bi env -> return (Yes env (f env))
+vectExpr e@(_, AnnApp _ arg)
+ | isAnnTypeArg arg
+ = vectTyAppExpr fn tys
+ where
+ (fn, tys) = collectAnnTypeArgs e
-setEnv :: VEnv -> VM ()
-setEnv env = VM $ \_ _ -> return (Yes env ())
+vectExpr (_, AnnApp (_, AnnVar v) (_, AnnLit lit))
+ | Just con <- isDataConId_maybe v
+ , is_special_con con
+ = do
+ let vexpr = App (Var v) (Lit lit)
+ lexpr <- liftPA vexpr
+ return (vexpr, lexpr)
+ where
+ is_special_con con = con `elem` [intDataCon, floatDataCon, doubleDataCon]
-updEnv :: (VEnv -> VEnv) -> VM ()
-updEnv f = VM $ \_ env -> return (Yes (f env) ())
-newTyVar :: FastString -> Kind -> VM Var
-newTyVar fs k
+vectExpr (_, AnnApp fn arg)
= do
- u <- liftDs newUnique
- return $ mkTyVar (mkSysTvName u fs) k
+ 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
-lookupVar :: Var -> VM CoreExpr
-lookupVar v = maybeV . readEnv $ \env -> lookupVarEnv (vect_vars env) v
+vectExpr (_, AnnCase 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)
-lookupTyCon :: TyCon -> VM (Maybe TyCon)
-lookupTyCon tc = readEnv $ \env -> lookupNameEnv (vect_tycons env) (tyConName tc)
+vectExpr (_, AnnCase _ _ _ _)
+ = panic "vectExpr: case"
--- ----------------------------------------------------------------------------
--- Bindings
+vectExpr (_, AnnLet (AnnNonRec bndr rhs) body)
+ = do
+ vrhs <- localV . inBind bndr $ vectPolyExpr rhs
+ (vbndr, vbody) <- vectBndrIn bndr (vectExpr body)
+ return $ vLet (vNonRec vbndr vrhs) vbody
-vectoriseModule :: VectInfo -> ModGuts -> DsM ModGuts
-vectoriseModule info guts
+vectExpr (_, AnnLet (AnnRec bs) body)
= do
- builtins <- initBuiltins
- env <- initVEnv info
- r <- runVM (vectModule guts) builtins env
- case r of
- Yes env' guts' -> return $ updVectInfo env' guts'
- No -> return guts
+ (vbndrs, (vrhss, vbody)) <- vectBndrsIn bndrs
+ $ liftM2 (,)
+ (zipWithM vect_rhs bndrs rhss)
+ (vectPolyExpr body)
+ return $ vLet (vRec vbndrs vrhss) vbody
+ where
+ (bndrs, rhss) = unzip bs
-vectModule :: ModGuts -> VM ModGuts
-vectModule guts = return guts
+ vect_rhs bndr rhs = localV
+ . inBind bndr
+ $ vectExpr rhs
--- ----------------------------------------------------------------------------
--- Types
+vectExpr e@(fvs, AnnLam bndr _)
+ | not (isId bndr) = pprPanic "vectExpr" (ppr $ deAnnotate e)
+ | otherwise = vectLam fvs bs body
+ where
+ (bs,body) = collectAnnValBinders e
-paArgType :: Type -> Kind -> VM (Maybe Type)
-paArgType ty k
- | Just k' <- kindView k = paArgType ty k'
+vectExpr e = pprPanic "vectExpr" (ppr $ deAnnotate e)
--- Here, we assume that for a kind (k1 -> k2) to be valid, k1 and k2 can only
--- be made up of * and (->), i.e., they can't be coercion kinds or #.
-paArgType ty (FunTy k1 k2)
+vectLam :: VarSet -> [Var] -> CoreExprWithFVs -> VM VExpr
+vectLam fvs bs body
= do
- tv <- newTyVar FSLIT("a") k1
- ty1 <- paArgType' (TyVarTy tv) k1
- ty2 <- paArgType' (AppTy ty (TyVarTy tv)) k2
- return . Just $ ForAllTy tv (FunTy ty1 ty2)
-
-paArgType ty k
- | isLiftedTypeKind k
+ tyvars <- localTyVars
+ (vs, vvs) <- readLEnv $ \env ->
+ unzip [(var, vv) | var <- varSetElems fvs
+ , Just vv <- [lookupVarEnv (local_vars env) var]]
+
+ arg_tys <- mapM (vectType . idType) bs
+ res_ty <- vectType (exprType $ deAnnotate body)
+
+ buildClosures tyvars vvs arg_tys res_ty
+ . hoistPolyVExpr tyvars
+ $ do
+ lc <- builtin liftingContext
+ (vbndrs, vbody) <- vectBndrsIn (vs ++ bs)
+ (vectExpr body)
+ return $ vLams lc vbndrs vbody
+
+vectTyAppExpr :: CoreExprWithFVs -> [Type] -> VM VExpr
+vectTyAppExpr (_, AnnVar v) tys = vectPolyVar v tys
+vectTyAppExpr e _ = pprPanic "vectTyAppExpr" (ppr $ deAnnotate e)
+
+-- We convert
+--
+-- case e :: t of v { ... }
+--
+-- to
+--
+-- 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. We also
+-- have to handle the case where v is a wild var correctly.
+--
+
+-- FIXME: this is too lazy
+vectAlgCase :: TyCon -> [Type] -> CoreExprWithFVs -> Var -> Type
+ -> [(AltCon, [Var], CoreExprWithFVs)]
+ -> VM VExpr
+vectAlgCase _tycon _ty_args scrut bndr ty [(DEFAULT, [], body)]
= do
- tc <- builtin paTyCon
- return . Just $ TyConApp tc [ty]
+ vscrut <- vectExpr scrut
+ (vty, lty) <- vectAndLiftType ty
+ (vbndr, vbody) <- vectBndrIn bndr (vectExpr body)
+ return $ vCaseDEFAULT vscrut vbndr vty lty vbody
- | otherwise
- = return Nothing
+vectAlgCase _tycon _ty_args scrut bndr ty [(DataAlt _, [], body)]
+ = do
+ vscrut <- vectExpr scrut
+ (vty, lty) <- vectAndLiftType ty
+ (vbndr, vbody) <- vectBndrIn bndr (vectExpr body)
+ return $ vCaseDEFAULT vscrut vbndr vty lty vbody
-paArgType' :: Type -> Kind -> VM Type
-paArgType' ty k
+vectAlgCase tycon _ty_args scrut bndr ty [(DataAlt dc, bndrs, body)]
= do
- r <- paArgType ty k
- case r of
- Just ty' -> return ty'
- Nothing -> pprPanic "paArgType'" (ppr ty)
-
-vectTyCon :: TyCon -> VM TyCon
-vectTyCon tc
- | isFunTyCon tc = builtin closureTyCon
- | isBoxedTupleTyCon tc = return tc
- | isUnLiftedTyCon tc = return tc
- | otherwise = do
- r <- lookupTyCon tc
- case r of
- Just tc' -> return tc'
-
- -- FIXME: just for now
- Nothing -> pprTrace "ccTyCon:" (ppr tc) $ return tc
-
-vectType :: Type -> VM Type
-vectType ty | Just ty' <- coreView ty = vectType ty
-vectType (TyVarTy tv) = return $ TyVarTy tv
-vectType (AppTy ty1 ty2) = liftM2 AppTy (vectType ty1) (vectType ty2)
-vectType (TyConApp tc tys) = liftM2 TyConApp (vectTyCon tc) (mapM vectType tys)
-vectType (FunTy ty1 ty2) = liftM2 TyConApp (builtin closureTyCon)
- (mapM vectType [ty1,ty2])
-vectType (ForAllTy tv ty)
+ vect_tc <- maybeV (lookupTyCon tycon)
+ (vty, lty) <- vectAndLiftType ty
+ vexpr <- vectExpr scrut
+ (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
+ 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
- r <- paArgType (TyVarTy tv) (tyVarKind tv)
- ty' <- vectType ty
- return . ForAllTy tv $ case r of { Just paty -> FunTy paty ty'; Nothing -> ty' }
+ vect_tc <- maybeV (lookupTyCon tycon)
+ (vty, lty) <- vectAndLiftType ty
+ 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 vty 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)
-vectType ty = pprPanic "vectType:" (ppr ty)
+ 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
+ cmp _ _ = panic "vectAlgCase/cmp"
+
+ proc_alt sel vty 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 vty lty
+ $ vectExpr body
+
+ return (vect_dc, vect_bndrs, lift_bndrs, vbody)
+ proc_alt _ _ _ _ = panic "vectAlgCase/proc_alt"
+
+ 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 -> Type -> VM VExpr -> VM VExpr
+packLiftingContext len shape tag fvs vty lty 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
+ empty <- emptyPA vty
+ return (vexpr, Let (NonRec sel_var sel_expr)
+ $ Case len lc_var lty
+ [(DEFAULT, [], mkLets (concat bnds) lexpr),
+ (LitAlt (mkMachInt 0), [], empty)])
+
+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') }
projects / ghc-hetmet.git / blobdiff