+
module Vectorise( vectorise )
where
-#include "HsVersions.h"
-
import VectMonad
import VectUtils
import VectType
import TyCon
import Type
import FamInstEnv ( extendFamInstEnvList )
-import InstEnv ( extendInstEnvList )
import Var
import VarEnv
import VarSet
-import Name ( mkSysTvName, getName )
-import NameEnv
import Id
-import MkId ( unwrapFamInstScrut )
import OccName
-import DsMonad hiding (mapAndUnzipM)
-import DsUtils ( mkCoreTup, mkCoreTupTy )
+import DsMonad
-import Literal ( Literal )
-import PrelNames
+import Literal ( Literal, mkMachInt )
import TysWiredIn
-import TysPrim ( intPrimTy )
-import BasicTypes ( Boxity(..) )
import Outputable
import FastString
-import Control.Monad ( liftM, liftM2, mapAndUnzipM )
+import Control.Monad ( liftM, liftM2, zipWithM )
+import Data.List ( sortBy, unzip4 )
vectorise :: HscEnv -> UniqSupply -> RuleBase -> ModGuts
-> IO (SimplCount, ModGuts)
vectModule :: ModGuts -> VM ModGuts
vectModule guts
= do
- (types', fam_insts, pa_insts) <- vectTypeEnv (mg_types guts)
-
- let insts = map painstInstance pa_insts
- fam_inst_env' = extendFamInstEnvList (mg_fam_inst_env guts) fam_insts
- inst_env' = extendInstEnvList (mg_inst_env guts) insts
- updGEnv (setInstEnvs inst_env' fam_inst_env')
-
- dicts <- mapM buildPADict pa_insts
- binds' <- mapM vectTopBind (mg_binds guts)
+ (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 (concat dicts) : binds'
- , mg_inst_env = inst_env'
+ , mg_binds = Rec tc_binds : binds'
, mg_fam_inst_env = fam_inst_env'
- , mg_insts = mg_insts guts ++ insts
, mg_fam_insts = mg_fam_insts guts ++ fam_insts
}
vectTopBind b@(NonRec var expr)
= do
var' <- vectTopBinder var
- expr' <- vectTopRhs expr
+ 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
vectTopBind b@(Rec bs)
= do
vars' <- mapM vectTopBinder vars
- exprs' <- mapM vectTopRhs exprs
+ 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
vectTopBinder :: Var -> VM Var
vectTopBinder var
= do
- vty <- vectType (idType var)
- name <- cloneName mkVectOcc (getName var)
- let var' | isExportedId var = Id.mkExportedLocalId name vty
- | otherwise = Id.mkLocalId name vty
+ vty <- vectType (idType var)
+ var' <- cloneId mkVectOcc var vty
defGlobalVar var var'
return var'
-
-vectTopRhs :: CoreExpr -> VM CoreExpr
-vectTopRhs expr
+
+vectTopRhs :: Var -> CoreExpr -> VM CoreExpr
+vectTopRhs var expr
= do
- lc <- newLocalVar FSLIT("lc") intPrimTy
closedV . liftM vectorised
- $ vectPolyExpr lc (freeVars expr)
+ . 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
vectBndr :: Var -> VM VVar
vectBndr v
= do
- vty <- vectType (idType v)
- lty <- mkPArrayType vty
+ (vty, lty) <- vectAndLiftType (idType v)
let vv = v `Id.setIdType` vty
lv = v `Id.setIdType` lty
updLEnv (mapTo vv lv)
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)
+
vectBndrsIn :: [Var] -> VM a -> VM ([VVar], a)
vectBndrsIn vs p
= localV
-- ----------------------------------------------------------------------------
-- Expressions
-capply :: VExpr -> VExpr -> VM VExpr
-capply (vfn, lfn) (varg, larg)
- = do
- apply <- builtin applyClosureVar
- applyP <- builtin applyClosurePVar
- return (mkApps (Var apply) [Type arg_ty, Type res_ty, vfn, varg],
- mkApps (Var applyP) [Type arg_ty, Type res_ty, lfn, larg])
- where
- fn_ty = exprType vfn
- (arg_ty, res_ty) = splitClosureTy fn_ty
-
-vectVar :: Var -> Var -> VM VExpr
-vectVar lc v
+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 <- replicatePA vexpr (Var lc)
+ lexpr <- liftPA vexpr
return (vexpr, lexpr)
-vectPolyVar :: Var -> Var -> [Type] -> VM VExpr
-vectPolyVar lc v tys
+vectPolyVar :: Var -> [Type] -> VM VExpr
+vectPolyVar v tys
= do
vtys <- mapM vectType tys
r <- lookupVar v
(polyApply (Var lv) vtys)
Global poly -> do
vexpr <- polyApply (Var poly) vtys
- lexpr <- replicatePA vexpr (Var lc)
+ lexpr <- liftPA vexpr
return (vexpr, lexpr)
-vectLiteral :: Var -> Literal -> VM VExpr
-vectLiteral lc lit
+vectLiteral :: Literal -> VM VExpr
+vectLiteral lit
= do
- lexpr <- replicatePA (Lit lit) (Var lc)
+ lexpr <- liftPA (Lit lit)
return (Lit lit, lexpr)
-vectPolyExpr :: Var -> CoreExprWithFVs -> VM VExpr
-vectPolyExpr lc expr
+vectPolyExpr :: CoreExprWithFVs -> VM VExpr
+vectPolyExpr (_, AnnNote note expr)
+ = liftM (vNote note) $ vectPolyExpr expr
+vectPolyExpr expr
= polyAbstract tvs $ \abstract ->
- -- FIXME: shadowing (tvs in lc)
do
- mono' <- vectExpr lc mono
+ mono' <- vectExpr mono
return $ mapVect abstract mono'
where
- (tvs, mono) = collectAnnTypeBinders expr
-
-vectExpr :: Var -> CoreExprWithFVs -> VM VExpr
-vectExpr lc (_, AnnType ty)
+ (tvs, mono) = collectAnnTypeBinders expr
+
+vectExpr :: CoreExprWithFVs -> VM VExpr
+vectExpr (_, AnnType ty)
= liftM vType (vectType ty)
-vectExpr lc (_, AnnVar v) = vectVar lc v
+vectExpr (_, AnnVar v) = vectVar v
-vectExpr lc (_, AnnLit lit) = vectLiteral lc lit
+vectExpr (_, AnnLit lit) = vectLiteral lit
-vectExpr lc (_, AnnNote note expr)
- = liftM (vNote note) (vectExpr lc expr)
+vectExpr (_, AnnNote note expr)
+ = liftM (vNote note) (vectExpr expr)
-vectExpr lc e@(_, AnnApp _ arg)
+vectExpr e@(_, AnnApp _ arg)
| isAnnTypeArg arg
- = vectTyAppExpr lc fn tys
+ = vectTyAppExpr fn tys
where
(fn, tys) = collectAnnTypeArgs e
-vectExpr lc (_, AnnApp fn arg)
+vectExpr (_, AnnApp (_, AnnVar v) (_, AnnLit lit))
+ | Just con <- isDataConId_maybe v
+ , is_special_con con
= do
- fn' <- vectExpr lc fn
- arg' <- vectExpr lc arg
- capply fn' arg'
+ let vexpr = App (Var v) (Lit lit)
+ lexpr <- liftPA vexpr
+ return (vexpr, lexpr)
+ where
+ is_special_con con = con `elem` [intDataCon, floatDataCon, doubleDataCon]
+
+
+vectExpr (_, AnnApp fn arg)
+ = do
+ 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)
+ | Just (tycon, ty_args) <- splitTyConApp_maybe scrut_ty
+ , isAlgTyCon tycon
+ = vectAlgCase tycon ty_args scrut bndr ty alts
+ where
+ scrut_ty = exprType (deAnnotate scrut)
-vectExpr lc (_, AnnCase expr bndr ty alts)
+vectExpr (_, AnnCase _ _ _ _)
= panic "vectExpr: case"
-vectExpr lc (_, AnnLet (AnnNonRec bndr rhs) body)
+vectExpr (_, AnnLet (AnnNonRec bndr rhs) body)
= do
- vrhs <- vectPolyExpr lc rhs
- (vbndr, vbody) <- vectBndrIn bndr (vectExpr lc body)
+ vrhs <- localV . inBind bndr $ vectPolyExpr rhs
+ (vbndr, vbody) <- vectBndrIn bndr (vectExpr body)
return $ vLet (vNonRec vbndr vrhs) vbody
-vectExpr lc (_, AnnLet (AnnRec bs) body)
+vectExpr (_, AnnLet (AnnRec bs) body)
= do
(vbndrs, (vrhss, vbody)) <- vectBndrsIn bndrs
$ liftM2 (,)
- (mapM (vectExpr lc) rhss)
- (vectPolyExpr lc body)
+ (zipWithM vect_rhs bndrs rhss)
+ (vectPolyExpr body)
return $ vLet (vRec vbndrs vrhss) vbody
where
(bndrs, rhss) = unzip bs
-vectExpr lc e@(_, AnnLam bndr body)
- | isTyVar bndr = pprPanic "vectExpr" (ppr $ deAnnotate e)
+ vect_rhs bndr rhs = localV
+ . inBind bndr
+ $ vectExpr rhs
+
+vectExpr e@(fvs, AnnLam bndr _)
+ | not (isId bndr) = pprPanic "vectExpr" (ppr $ deAnnotate e)
+ | otherwise = vectLam fvs bs body
+ where
+ (bs,body) = collectAnnValBinders e
+
+vectExpr e = pprPanic "vectExpr" (ppr $ deAnnotate e)
-vectExpr lc (fvs, AnnLam bndr body)
+vectLam :: VarSet -> [Var] -> CoreExprWithFVs -> VM VExpr
+vectLam fvs bs body
= do
tyvars <- localTyVars
(vs, vvs) <- readLEnv $ \env ->
unzip [(var, vv) | var <- varSetElems fvs
, Just vv <- [lookupVarEnv (local_vars env) var]]
- arg_ty <- vectType (idType bndr)
- res_ty <- vectType (exprType $ deAnnotate body)
- buildClosure tyvars lc vvs arg_ty res_ty
- . hoistPolyVExpr FSLIT("fn") tyvars
+ arg_tys <- mapM (vectType . idType) bs
+ res_ty <- vectType (exprType $ deAnnotate body)
+
+ buildClosures tyvars vvs arg_tys res_ty
+ . hoistPolyVExpr tyvars
$ do
- new_lc <- newLocalVar FSLIT("lc") intPrimTy
- (vbndrs, vbody) <- vectBndrsIn (vs ++ [bndr])
- (vectExpr new_lc body)
- return $ vLams new_lc vbndrs vbody
-
-vectTyAppExpr :: Var -> CoreExprWithFVs -> [Type] -> VM (CoreExpr, CoreExpr)
-vectTyAppExpr lc (_, AnnVar v) tys = vectPolyVar lc v tys
-vectTyAppExpr lc e tys = pprPanic "vectTyAppExpr" (ppr $ deAnnotate e)
+ 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
+ vscrut <- vectExpr scrut
+ (vty, lty) <- vectAndLiftType ty
+ (vbndr, vbody) <- vectBndrIn bndr (vectExpr body)
+ return $ vCaseDEFAULT vscrut vbndr vty lty vbody
+
+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
+
+vectAlgCase tycon _ty_args scrut bndr ty [(DataAlt dc, bndrs, body)]
+ = do
+ 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
+ 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)
+
+ 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