X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2Fvectorise%2FVectorise.hs;h=85f4e4612ae160320170206aeb6cca3606fae93c;hb=9b568f44572383f07ce0f7bf9ab9478410262475;hp=bbfa562f31396ccd5d19ecbf2db4d5d0e9217093;hpb=fc21a2bcf35337942156d246f0c1c1b7072f3f91;p=ghc-hetmet.git

diff --git a/compiler/vectorise/Vectorise.hs b/compiler/vectorise/Vectorise.hs
index bbfa562..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 )
@@ -60,21 +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
-      workers <- mapM vectDataConWorkers pa_insts
+      -- 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_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
                     }
 
@@ -137,6 +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
@@ -210,6 +215,12 @@ vectExpr (_, AnnApp fn arg)
       arg' <- vectExpr arg
       mkClosureApp fn' arg'
 
+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"
 
@@ -262,3 +273,44 @@ 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