Vectorise top-level bindings of a module

[ghc-hetmet.git] / compiler / vectorise / Vectorise.hs

diff --git a/compiler/vectorise/Vectorise.hs b/compiler/vectorise/Vectorise.hs
index c9df41b..59039e9 100644 (file)
--- a/compiler/vectorise/Vectorise.hs
+++ b/compiler/vectorise/Vectorise.hs
@@ -20,10 +20,11 @@ import TypeRep
 import Var
 import VarEnv
 import VarSet
-import Name                 ( mkSysTvName )
+import Name                 ( mkSysTvName, getName )
 import NameEnv
 import Id
 import MkId                 ( unwrapFamInstScrut )
+import OccName
 
 import DsMonad hiding (mapAndUnzipM)
 import DsUtils              ( mkCoreTup, mkCoreTupTy )
@@ -52,7 +53,46 @@ vectorise hsc_env guts
     dflags = hsc_dflags hsc_env
 
 vectModule :: ModGuts -> VM ModGuts
-vectModule guts = return guts
+vectModule guts
+  = do
+      binds' <- mapM vectTopBind (mg_binds guts)
+      return $ guts { mg_binds = binds' }
+
+vectTopBind :: CoreBind -> VM CoreBind
+vectTopBind b@(NonRec var expr)
+  = do
+      var'  <- vectTopBinder var
+      expr' <- vectTopRhs expr
+      hs    <- takeHoisted
+      return . Rec $ (var, expr) : (var', expr') : hs
+  `orElseV`
+    return b
+
+vectTopBind b@(Rec bs)
+  = do
+      vars'  <- mapM vectTopBinder vars
+      exprs' <- mapM vectTopRhs exprs
+      hs     <- takeHoisted
+      return . Rec $ bs ++ zip vars' exprs' ++ hs
+  `orElseV`
+    return b
+  where
+    (vars, exprs) = unzip bs
+
+vectTopBinder :: Var -> VM Var
+vectTopBinder var
+  = do
+      vty <- liftM (mkForAllTys tyvars) $ vectType mono_ty
+      name <- cloneName mkVectOcc (getName var)
+      let var' | isExportedId var = Id.mkExportedLocalId name vty
+               | otherwise        = Id.mkLocalId         name vty
+      defGlobalVar var var'
+      return var'
+  where
+    (tyvars, mono_ty) = splitForAllTys (idType var)
+    
+vectTopRhs :: CoreExpr -> VM CoreExpr
+vectTopRhs = liftM fst . closedV . vectPolyExpr (panic "Empty lifting context") . freeVars
 
 -- ----------------------------------------------------------------------------
 -- Bindings
@@ -109,26 +149,25 @@ capply (vfn, lfn) (varg, larg)
     (arg_ty, res_ty) = splitClosureTy fn_ty
 
 vectVar :: CoreExpr -> Var -> VM (CoreExpr, CoreExpr)
-vectVar lc v = local v `orElseV` global v
-  where
-    local  v = maybeV (readLEnv $ \env -> lookupVarEnv (local_vars env) v)
-    global v = do
-                 vexpr <- maybeV (readGEnv $ \env -> lookupVarEnv (global_vars env) v)
-                 lexpr <- replicateP vexpr lc
-                 return (vexpr, lexpr)
+vectVar lc v
+  = do
+      r <- lookupVar v
+      case r of
+        Local es     -> return es
+        Global vexpr -> do
+                          lexpr <- replicateP vexpr lc
+                          return (vexpr, lexpr)
 
 vectPolyVar :: CoreExpr -> Var -> [Type] -> VM (CoreExpr, CoreExpr)
 vectPolyVar lc v tys
   = do
-      r <- readLEnv $ \env -> lookupVarEnv (local_vars env) v
+      r <- lookupVar v
       case r of
-        Just (vexpr, lexpr) -> liftM2 (,) (mk_app vexpr) (mk_app lexpr)
-        Nothing ->
-          do
-            poly  <- maybeV (readGEnv $ \env -> lookupVarEnv (global_vars env) v)
-            vexpr <- mk_app poly
-            lexpr <- replicateP vexpr lc
-            return (vexpr, lexpr)
+        Local (vexpr, lexpr) -> liftM2 (,) (mk_app vexpr) (mk_app lexpr)
+        Global poly          -> do
+                                  vexpr <- mk_app poly
+                                  lexpr <- replicateP vexpr lc
+                                  return (vexpr, lexpr)
   where
     mk_app e = applyToTypes e =<< mapM vectType tys