X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2Fvectorise%2FVectorise.hs;h=a0e3e1a0685a8071e12d0f13b7785bcf87fcb211;hp=41164464c51844d897175ad4602518893db20731;hb=703ca1542c8e0983cc9d8eebce6e9f3dd3fd71e2;hpb=f26b161bf682863353f188c2a8d52b7492bebcfa diff --git a/compiler/vectorise/Vectorise.hs b/compiler/vectorise/Vectorise.hs index 4116446..a0e3e1a 100644 --- a/compiler/vectorise/Vectorise.hs +++ b/compiler/vectorise/Vectorise.hs @@ -1,96 +1,63 @@ + module Vectorise( vectorise ) where -#include "HsVersions.h" - import VectMonad import VectUtils import VectType import VectCore -import DynFlags -import HscTypes +import HscTypes hiding ( MonadThings(..) ) -import CoreLint ( showPass, endPass ) +import Module ( PackageId ) import CoreSyn import CoreUtils import CoreFVs -import SimplMonad ( SimplCount, zeroSimplCount ) -import Rules ( RuleBase ) +import CoreMonad ( CoreM, getHscEnv ) import DataCon import TyCon import Type import FamInstEnv ( extendFamInstEnvList ) -import InstEnv ( extendInstEnvList ) import Var import VarEnv import VarSet -import Name ( Name, mkSysTvName, getName ) -import NameEnv import Id -import MkId ( unwrapFamInstScrut ) import OccName -import RdrName ( RdrName, mkRdrQual ) -import Module ( mkModuleNameFS ) -import DsMonad hiding (mapAndUnzipM) -import DsUtils ( mkCoreTup, mkCoreTupTy ) - -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, zipWithM, mapAndUnzipM ) - -mkNDPVar :: String -> RdrName -mkNDPVar s = mkRdrQual nDP_BUILTIN (mkVarOcc s) +import Control.Monad ( liftM, liftM2, zipWithM ) +import Data.List ( sortBy, unzip4 ) -mkNDPVarFS :: FastString -> RdrName -mkNDPVarFS fs = mkRdrQual nDP_BUILTIN (mkVarOccFS fs) +vectorise :: PackageId -> ModGuts -> CoreM ModGuts +vectorise backend guts = do + hsc_env <- getHscEnv + liftIO $ vectoriseIO backend hsc_env guts -builtin_PAs :: [(Name, RdrName)] -builtin_PAs = [ - 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) - -vectorise :: HscEnv -> UniqSupply -> RuleBase -> ModGuts - -> IO (SimplCount, ModGuts) -vectorise hsc_env _ _ guts +vectoriseIO :: PackageId -> HscEnv -> ModGuts -> IO ModGuts +vectoriseIO backend hsc_env guts = do - showPass dflags "Vectorisation" eps <- hscEPS hsc_env let info = hptVectInfo hsc_env `plusVectInfo` eps_vect_info eps - Just (info', guts') <- initV hsc_env guts info (vectModule guts) - endPass dflags "Vectorisation" Opt_D_dump_vect (mg_binds guts') - return (zeroSimplCount dflags, guts' { mg_vect_info = info' }) - where - dflags = hsc_dflags hsc_env + Just (info', guts') <- initV backend hsc_env guts info (vectModule guts) + return (guts' { mg_vect_info = info' }) vectModule :: ModGuts -> VM ModGuts vectModule guts = do - defTyConRdrPAs builtin_PAs - (types', fam_insts) <- vectTypeEnv (mg_types 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 workers ++ concat dicts) : - binds' + , mg_binds = Rec tc_binds : binds' , mg_fam_inst_env = fam_inst_env' , mg_fam_insts = mg_fam_insts guts ++ fam_insts } @@ -101,7 +68,8 @@ vectTopBind b@(NonRec var expr) 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 @@ -110,7 +78,8 @@ vectTopBind b@(Rec bs) 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 @@ -123,7 +92,7 @@ vectTopBinder var var' <- cloneId mkVectOcc var vty defGlobalVar var var' return var' - + vectTopRhs :: Var -> CoreExpr -> VM CoreExpr vectTopRhs var expr = do @@ -131,14 +100,17 @@ vectTopRhs var 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) @@ -146,6 +118,16 @@ vectBndr v 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 @@ -154,6 +136,14 @@ vectBndrIn v p 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 @@ -196,14 +186,16 @@ vectLiteral 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 + mono' <- vectFnExpr False mono return $ mapVect abstract mono' where - (tvs, mono) = collectAnnTypeBinders expr - + (tvs, mono) = collectAnnTypeBinders expr + vectExpr :: CoreExprWithFVs -> VM VExpr vectExpr (_, AnnType ty) = liftM vType (vectType ty) @@ -221,14 +213,33 @@ vectExpr e@(_, AnnApp _ arg) where (fn, tys) = collectAnnTypeArgs e +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] + + 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 expr bndr ty alts) - = panic "vectExpr: case" +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 (_, AnnLet (AnnNonRec bndr rhs) body) = do @@ -250,14 +261,59 @@ vectExpr (_, AnnLet (AnnRec bs) body) . inBind bndr $ vectExpr rhs -vectExpr e@(fvs, AnnLam bndr _) - | not (isId bndr) = pprPanic "vectExpr" (ppr $ deAnnotate e) - | otherwise = vectLam fvs bs body +vectExpr e@(_, AnnLam bndr _) + | isId bndr = vectFnExpr True e +{- +onlyIfV (isEmptyVarSet fvs) (vectScalarLam bs $ deAnnotate body) + `orElseV` vectLam True fvs bs body + where + (bs,body) = collectAnnValBinders e +-} + +vectExpr e = cantVectorise "Can't vectorise expression" (ppr $ deAnnotate e) + +vectFnExpr :: Bool -> CoreExprWithFVs -> VM VExpr +vectFnExpr inline e@(fvs, AnnLam bndr _) + | isId bndr = onlyIfV (isEmptyVarSet fvs) (vectScalarLam bs $ deAnnotate body) + `orElseV` vectLam inline fvs bs body where (bs,body) = collectAnnValBinders e +vectFnExpr _ e = vectExpr e + -vectLam :: VarSet -> [Var] -> CoreExprWithFVs -> VM VExpr -vectLam fvs bs body +vectScalarLam :: [Var] -> CoreExpr -> VM VExpr +vectScalarLam args body + = do + scalars <- globalScalars + onlyIfV (all is_scalar_ty arg_tys + && is_scalar_ty res_ty + && is_scalar (extendVarSetList scalars args) body) + $ do + fn_var <- hoistExpr (fsLit "fn") (mkLams args body) + zipf <- zipScalars arg_tys res_ty + clo <- scalarClosure arg_tys res_ty (Var fn_var) + (zipf `App` Var fn_var) + clo_var <- hoistExpr (fsLit "clo") clo + lclo <- liftPA (Var clo_var) + return (Var clo_var, lclo) + where + arg_tys = map idType args + res_ty = exprType body + + is_scalar_ty ty | Just (tycon, []) <- splitTyConApp_maybe ty + = tycon == intTyCon + || tycon == floatTyCon + || tycon == doubleTyCon + + | otherwise = False + + is_scalar vs (Var v) = v `elemVarSet` vs + is_scalar _ e@(Lit _) = is_scalar_ty $ exprType e + is_scalar vs (App e1 e2) = is_scalar vs e1 && is_scalar vs e2 + is_scalar _ _ = False + +vectLam :: Bool -> VarSet -> [Var] -> CoreExprWithFVs -> VM VExpr +vectLam inline fvs bs body = do tyvars <- localTyVars (vs, vvs) <- readLEnv $ \env -> @@ -273,9 +329,178 @@ vectLam fvs bs body lc <- builtin liftingContext (vbndrs, vbody) <- vectBndrsIn (vs ++ bs) (vectExpr body) - return $ vLams lc vbndrs vbody - + return . maybe_inline $ vLams lc vbndrs vbody + where + maybe_inline = if inline then vInlineMe else id + vectTyAppExpr :: CoreExprWithFVs -> [Type] -> VM VExpr vectTyAppExpr (_, AnnVar v) tys = vectPolyVar v tys -vectTyAppExpr e tys = pprPanic "vectTyAppExpr" (ppr $ deAnnotate e) +vectTyAppExpr e tys = cantVectorise "Can't vectorise expression" + (ppr $ deAnnotate e `mkTyApps` tys) + +-- 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 + + vdummy <- newDummyVar (exprType vect_scrut) + ldummy <- newDummyVar (exprType lift_scrut) + let vect_case = Case vect_scrut vdummy 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 ldummy 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') }