X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2Fvectorise%2FVectorise.hs;h=85f4e4612ae160320170206aeb6cca3606fae93c;hp=7a29a7bf079698591ab89e3c0fc787c2d1ad794e;hb=21d9b432b676af304dff8d7f4e1e31e1678bcae3;hpb=6ed5e6a3e9fbbd08f67a6136544aac1219680f5b

diff --git a/compiler/vectorise/Vectorise.hs b/compiler/vectorise/Vectorise.hs
index 7a29a7b..85f4e46 100644
--- a/compiler/vectorise/Vectorise.hs
+++ b/compiler/vectorise/Vectorise.hs
@@ -25,11 +25,12 @@ import InstEnv              ( extendInstEnvList )
 import Var
 import VarEnv
 import VarSet
-import Name                 ( mkSysTvName, getName )
+import Name                 ( Name, mkSysTvName, getName )
 import NameEnv
 import Id
 import MkId                 ( unwrapFamInstScrut )
 import OccName
+import Module               ( Module )
 
 import DsMonad hiding (mapAndUnzipM)
 import DsUtils              ( mkCoreTup, mkCoreTupTy )
@@ -60,20 +61,17 @@ vectorise hsc_env _ _ guts
 vectModule :: ModGuts -> VM ModGuts
 vectModule guts
   = do
-      (types', fam_insts, pa_insts) <- vectTypeEnv (mg_types guts)
+      (types', fam_insts, tc_binds) <- 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')
+      let fam_inst_env' = extendFamInstEnvList (mg_fam_inst_env guts) fam_insts
+      updGEnv (setFamInstEnv fam_inst_env')
      
-      dicts  <- mapM buildPADict pa_insts 
-      binds' <- mapM vectTopBind (mg_binds guts)
+      -- 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
                     }
 
@@ -101,20 +99,17 @@ vectTopBind b@(Rec bs)
 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 :: Var -> CoreExpr -> VM CoreExpr
 vectTopRhs var expr
   = do
-      lc <- newLocalVar FSLIT("lc") intPrimTy
       closedV . liftM vectorised
               . inBind var
-              $ vectPolyExpr lc (freeVars expr)
+              $ vectPolyExpr (freeVars expr)
 
 -- ----------------------------------------------------------------------------
 -- Bindings
@@ -139,6 +134,14 @@ vectBndrIn v p
       x <- p
       return (vv, x)
 
+vectBndrIn' :: Var -> (VVar -> VM a) -> VM (VVar, a)
+vectBndrIn' v p
+  = localV
+  $ do
+      vv <- vectBndr v
+      x  <- p vv
+      return (vv, x)
+
 vectBndrsIn :: [Var] -> VM a -> VM ([VVar], a)
 vectBndrsIn vs p
   = localV
@@ -150,19 +153,19 @@ vectBndrsIn vs p
 -- ----------------------------------------------------------------------------
 -- Expressions
 
-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 (Var lc) vexpr
+                           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
@@ -171,79 +174,84 @@ vectPolyVar lc v tys
                                      (polyApply (Var lv) vtys)
         Global poly    -> do
                             vexpr <- polyApply (Var poly) vtys
-                            lexpr <- replicatePA (Var lc) vexpr
+                            lexpr <- liftPA vexpr
                             return (vexpr, lexpr)
 
-vectLiteral :: Var -> Literal -> VM VExpr
-vectLiteral lc lit
+vectLiteral :: Literal -> VM VExpr
+vectLiteral lit
   = do
-      lexpr <- replicatePA (Var lc) (Lit lit)
+      lexpr <- liftPA (Lit lit)
       return (Lit lit, lexpr)
 
-vectPolyExpr :: Var -> CoreExprWithFVs -> VM VExpr
-vectPolyExpr lc expr
+vectPolyExpr :: CoreExprWithFVs -> VM VExpr
+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)
+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 fn arg)
   = do
-      fn'  <- vectExpr lc fn
-      arg' <- vectExpr lc arg
+      fn'  <- vectExpr fn
+      arg' <- vectExpr arg
       mkClosureApp fn' arg'
 
-vectExpr lc (_, AnnCase expr bndr ty alts)
+vectExpr (_, AnnCase scrut bndr ty alts)
+  | isAlgType scrut_ty
+  = vectAlgCase scrut bndr ty alts
+  where
+    scrut_ty = exprType (deAnnotate scrut)
+
+vectExpr (_, AnnCase expr bndr ty alts)
   = panic "vectExpr: case"
 
-vectExpr lc (_, AnnLet (AnnNonRec bndr rhs) body)
+vectExpr (_, AnnLet (AnnNonRec bndr rhs) body)
   = do
-      vrhs <- localV . inBind bndr $ 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 (,)
                                   (zipWithM vect_rhs bndrs rhss)
-                                  (vectPolyExpr lc body)
+                                  (vectPolyExpr body)
       return $ vLet (vRec vbndrs vrhss) vbody
   where
     (bndrs, rhss) = unzip bs
 
     vect_rhs bndr rhs = localV
                       . inBind bndr
-                      $ vectExpr lc rhs
+                      $ vectExpr rhs
 
-vectExpr lc e@(fvs, AnnLam bndr _)
+vectExpr e@(fvs, AnnLam bndr _)
   | not (isId bndr) = pprPanic "vectExpr" (ppr $ deAnnotate e)
-  | otherwise = vectLam lc fvs bs body
+  | otherwise = vectLam fvs bs body
   where
     (bs,body) = collectAnnValBinders e
 
-vectLam :: Var -> VarSet -> [Var] -> CoreExprWithFVs -> VM VExpr
-vectLam lc fvs bs body
+vectLam :: VarSet -> [Var] -> CoreExprWithFVs -> VM VExpr
+vectLam fvs bs body
   = do
       tyvars <- localTyVars
       (vs, vvs) <- readLEnv $ \env ->
@@ -253,14 +261,56 @@ vectLam lc fvs bs body
       arg_tys <- mapM (vectType . idType) bs
       res_ty  <- vectType (exprType $ deAnnotate body)
 
-      buildClosures tyvars lc vvs arg_tys res_ty
+      buildClosures tyvars vvs arg_tys res_ty
         . hoistPolyVExpr tyvars
         $ do
+            lc <- builtin liftingContext
             (vbndrs, vbody) <- vectBndrsIn (vs ++ bs)
-                                           (vectExpr lc body)
+                                           (vectExpr body)
             return $ vLams lc vbndrs vbody
   
-vectTyAppExpr :: Var -> CoreExprWithFVs -> [Type] -> VM VExpr
-vectTyAppExpr lc (_, AnnVar v) tys = vectPolyVar lc v tys
-vectTyAppExpr lc e tys = pprPanic "vectTyAppExpr" (ppr $ deAnnotate e)
+vectTyAppExpr :: CoreExprWithFVs -> [Type] -> VM VExpr
+vectTyAppExpr (_, AnnVar v) tys = vectPolyVar v tys
+vectTyAppExpr e tys = pprPanic "vectTyAppExpr" (ppr $ deAnnotate e)
+
+type CoreAltWithFVs = AnnAlt Id VarSet
+
+-- 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.
+--   
+
+-- FIXME: this is too lazy
+vectAlgCase scrut bndr ty [(DEFAULT, [], body)]
+  = do
+      vscrut <- vectExpr scrut
+      vty    <- vectType ty
+      lty    <- mkPArrayType vty
+      (vbndr, vbody) <- vectBndrIn bndr (vectExpr body)
+      return $ vCaseDEFAULT vscrut vbndr vty lty vbody
 
+vectAlgCase scrut bndr ty [(DataAlt dc, bndrs, body)]
+  = do
+      vty <- vectType ty
+      lty <- mkPArrayType vty
+      vexpr <- vectExpr scrut
+      (vbndr, (vbndrs, vbody)) <- vectBndrIn 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
+      return . vLet (vNonRec vbndr vexpr)
+             $ vCaseProd vscrut vty lty vect_dc arr_dc shape_bndrs vbndrs vbody