Use OPTIONS rather than OPTIONS_GHC for pragmas

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

diff --git a/compiler/vectorise/Vectorise.hs b/compiler/vectorise/Vectorise.hs
index 4116446..6fd6190 100644 (file)
--- a/compiler/vectorise/Vectorise.hs
+++ b/compiler/vectorise/Vectorise.hs
@@ -1,3 +1,10 @@
+{-# OPTIONS -w #-}
+-- The above warning supression flag is a temporary kludge.
+-- While working on this module you are encouraged to remove it and fix
+-- any warnings in the module. See
+--     http://hackage.haskell.org/trac/ghc/wiki/CodingStyle#Warnings
+-- for details
+
 module Vectorise( vectorise )
 where
 
@@ -30,8 +37,7 @@ import NameEnv
 import Id
 import MkId                 ( unwrapFamInstScrut )
 import OccName
-import RdrName              ( RdrName, mkRdrQual )
-import Module               ( mkModuleNameFS )
+import Module               ( Module )
 
 import DsMonad hiding (mapAndUnzipM)
 import DsUtils              ( mkCoreTup, mkCoreTupTy )
@@ -46,23 +52,6 @@ import Outputable
 import FastString
 import Control.Monad        ( liftM, liftM2, zipWithM, mapAndUnzipM )
 
-mkNDPVar :: String -> RdrName
-mkNDPVar s = mkRdrQual nDP_BUILTIN (mkVarOcc s)
-
-mkNDPVarFS :: FastString -> RdrName
-mkNDPVarFS fs = mkRdrQual nDP_BUILTIN (mkVarOccFS fs)
-
-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
@@ -79,8 +68,7 @@ vectorise hsc_env _ _ guts
 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')
@@ -89,8 +77,7 @@ vectModule guts
       -- 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
                     }
@@ -154,6 +141,14 @@ 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
@@ -223,9 +218,19 @@ vectExpr e@(_, AnnApp _ arg)
 
 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 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"
@@ -279,3 +284,44 @@ 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