Fix bug in vectorisation

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

diff --git a/compiler/vectorise/Vectorise.hs b/compiler/vectorise/Vectorise.hs
index a4da858..166eae6 100644 (file)
--- a/compiler/vectorise/Vectorise.hs
+++ b/compiler/vectorise/Vectorise.hs
@@ -13,6 +13,8 @@ import CoreLint             ( showPass, endPass )
 import CoreSyn
 import CoreUtils
 import CoreFVs
+import SimplMonad           ( SimplCount, zeroSimplCount )
+import Rules                ( RuleBase )
 import DataCon
 import TyCon
 import Type
@@ -20,10 +22,11 @@ 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 )
@@ -37,22 +40,58 @@ import FastString
 import Control.Monad        ( liftM, liftM2, mapAndUnzipM, zipWithM_ )
 import Data.Maybe           ( maybeToList )
 
-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 (info', guts') <- initV hsc_env guts info (vectModule guts)
       endPass dflags "Vectorisation" Opt_D_dump_vect (mg_binds guts')
-      return $ guts' { mg_vect_info = info' }
+      return (zeroSimplCount dflags, guts' { mg_vect_info = info' })
   where
     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 <- vectType (idType var)
+      name <- cloneName mkVectOcc (getName var)
+      let var' | isExportedId var = Id.mkExportedLocalId name vty
+               | otherwise        = Id.mkLocalId         name vty
+      defGlobalVar var var'
+      return var'
+    
+vectTopRhs :: CoreExpr -> VM CoreExpr
+vectTopRhs = liftM fst . closedV . vectPolyExpr (panic "Empty lifting context") . freeVars
 
 -- ----------------------------------------------------------------------------
 -- Bindings
@@ -397,7 +436,7 @@ vectTyCon tc
                     Nothing  -> pprTrace "ccTyCon:" (ppr tc) $ return tc
 
 vectType :: Type -> VM Type
-vectType ty | Just ty' <- coreView ty = vectType ty
+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)