Simplify handling of variables during vectorisation

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

diff --git a/compiler/vectorise/VectMonad.hs b/compiler/vectorise/VectMonad.hs
index 7b201fa..d3512d1 100644 (file)
--- a/compiler/vectorise/VectMonad.hs
+++ b/compiler/vectorise/VectMonad.hs
@@ -3,19 +3,21 @@ module VectMonad (
   VM,
 
   noV, tryV, maybeV, orElseV, fixV, localV, closedV, initV,
-  cloneName, newLocalVar, newTyVar,
+  cloneName, newExportedVar, newLocalVar, newDummyVar, newTyVar,
   
-  Builtins(..), paDictTyCon,
+  Builtins(..), paDictTyCon, paDictDataCon,
   builtin,
 
   GlobalEnv(..),
+  setInstEnvs,
   readGEnv, setGEnv, updGEnv,
 
   LocalEnv(..),
   readLEnv, setLEnv, updLEnv,
 
-  defGlobalVar, lookupVar,
-  lookupTyCon,
+  lookupVar, defGlobalVar,
+  lookupTyCon, defTyCon,
+  lookupDataCon, defDataCon,
   lookupTyVarPA, defLocalTyVar, defLocalTyVarWithPA, localTyVars,
 
   lookupInst, lookupFamInst
@@ -45,6 +47,7 @@ import FamInstEnv
 import Panic
 import Outputable
 import FastString
+import SrcLoc        ( noSrcSpan )
 
 import Control.Monad ( liftM )
 
@@ -63,11 +66,15 @@ data Builtins = Builtins {
                 , applyClosurePVar :: Var
                 , lengthPAVar      :: Var
                 , replicatePAVar   :: Var
+                , emptyPAVar       :: Var
                 }
 
 paDictTyCon :: Builtins -> TyCon
 paDictTyCon = classTyCon . paClass
 
+paDictDataCon :: Builtins -> DataCon
+paDictDataCon = classDataCon . paClass
+
 initBuiltins :: DsM Builtins
 initBuiltins
   = do
@@ -81,6 +88,7 @@ initBuiltins
       applyClosurePVar <- dsLookupGlobalId applyClosurePName
       lengthPAVar      <- dsLookupGlobalId lengthPAName
       replicatePAVar   <- dsLookupGlobalId replicatePAName
+      emptyPAVar       <- dsLookupGlobalId emptyPAName
 
       return $ Builtins {
                  parrayTyCon      = parrayTyCon
@@ -92,12 +100,13 @@ initBuiltins
                , applyClosurePVar = applyClosurePVar
                , lengthPAVar      = lengthPAVar
                , replicatePAVar   = replicatePAVar
+               , emptyPAVar       = emptyPAVar
                }
 
 data GlobalEnv = GlobalEnv {
                   -- Mapping from global variables to their vectorised versions.
                   -- 
-                  global_vars :: VarEnv CoreExpr
+                  global_vars :: VarEnv Var
 
                   -- Exported variables which have a vectorised version
                   --
@@ -131,7 +140,7 @@ data LocalEnv = LocalEnv {
                  -- Mapping from local variables to their vectorised and
                  -- lifted versions
                  --
-                 local_vars :: VarEnv (CoreExpr, CoreExpr)
+                 local_vars :: VarEnv (Var, Var)
 
                  -- In-scope type variables
                  --
@@ -142,18 +151,27 @@ data LocalEnv = LocalEnv {
                }
               
 
-initGlobalEnv :: VectInfo -> (InstEnv, InstEnv) -> FamInstEnvs -> GlobalEnv
-initGlobalEnv info instEnvs famInstEnvs
+initGlobalEnv :: VectInfo -> (InstEnv, InstEnv) -> FamInstEnvs -> Builtins -> GlobalEnv
+initGlobalEnv info instEnvs famInstEnvs bi
   = GlobalEnv {
-      global_vars          = mapVarEnv  (Var . snd) $ vectInfoVar   info
+      global_vars          = mapVarEnv snd $ vectInfoVar info
     , global_exported_vars = emptyVarEnv
-    , global_tycons        = mapNameEnv snd $ vectInfoTyCon info
+    , global_tycons        = extendNameEnv (mapNameEnv snd (vectInfoTyCon info))
+                                           (tyConName funTyCon) (closureTyCon bi)
+                              
     , global_datacons      = mapNameEnv snd $ vectInfoDataCon info
     , global_inst_env      = instEnvs
     , global_fam_inst_env  = famInstEnvs
     , global_bindings      = []
     }
 
+setInstEnvs :: InstEnv -> FamInstEnv -> GlobalEnv -> GlobalEnv
+setInstEnvs l_inst l_fam_inst genv
+  | (g_inst,     _) <- global_inst_env genv
+  , (g_fam_inst, _) <- global_fam_inst_env genv
+  = genv { global_inst_env     = (g_inst, l_inst)
+         , global_fam_inst_env = (g_fam_inst, l_fam_inst) }
+
 emptyLocalEnv = LocalEnv {
                    local_vars     = emptyVarEnv
                  , local_tyvars   = []
@@ -263,12 +281,25 @@ cloneName mk_occ name = liftM make (liftDs newUnique)
                                                     (nameSrcSpan name)
            | otherwise           = mkSystemName u occ_name
 
+newExportedVar :: OccName -> Type -> VM Var
+newExportedVar occ_name ty 
+  = do
+      mod <- liftDs getModuleDs
+      u   <- liftDs newUnique
+
+      let name = mkExternalName u mod occ_name noSrcSpan
+      
+      return $ Id.mkExportedLocalId name ty
+
 newLocalVar :: FastString -> Type -> VM Var
 newLocalVar fs ty
   = do
       u <- liftDs newUnique
       return $ mkSysLocal fs u ty
 
+newDummyVar :: Type -> VM Var
+newDummyVar = newLocalVar FSLIT("ds")
+
 newTyVar :: FastString -> Kind -> VM Var
 newTyVar fs k
   = do
@@ -277,14 +308,14 @@ newTyVar fs k
 
 defGlobalVar :: Var -> Var -> VM ()
 defGlobalVar v v' = updGEnv $ \env ->
-  env { global_vars = extendVarEnv (global_vars env) v (Var v')
+  env { global_vars = extendVarEnv (global_vars env) v v'
       , global_exported_vars = upd (global_exported_vars env)
       }
   where
     upd env | isExportedId v = extendVarEnv env v (v, v')
             | otherwise      = env
 
-lookupVar :: Var -> VM (Scope CoreExpr (CoreExpr, CoreExpr))
+lookupVar :: Var -> VM (Scope Var (Var, Var))
 lookupVar v
   = do
       r <- readLEnv $ \env -> lookupVarEnv (local_vars env) v
@@ -294,7 +325,21 @@ lookupVar v
                  $  maybeV (readGEnv $ \env -> lookupVarEnv (global_vars env) v)
 
 lookupTyCon :: TyCon -> VM (Maybe TyCon)
-lookupTyCon tc = readGEnv $ \env -> lookupNameEnv (global_tycons env) (tyConName tc)
+lookupTyCon tc
+  | isUnLiftedTyCon tc || isTupleTyCon tc = return (Just tc)
+
+  | otherwise = readGEnv $ \env -> lookupNameEnv (global_tycons env) (tyConName tc)
+
+defTyCon :: TyCon -> TyCon -> VM ()
+defTyCon tc tc' = updGEnv $ \env ->
+  env { global_tycons = extendNameEnv (global_tycons env) (tyConName tc) tc' }
+
+lookupDataCon :: DataCon -> VM (Maybe DataCon)
+lookupDataCon dc = readGEnv $ \env -> lookupNameEnv (global_datacons env) (dataConName dc)
+
+defDataCon :: DataCon -> DataCon -> VM ()
+defDataCon dc dc' = updGEnv $ \env ->
+  env { global_datacons = extendNameEnv (global_datacons env) (dataConName dc) dc' }
 
 lookupTyVarPA :: Var -> VM (Maybe CoreExpr)
 lookupTyVarPA tv = readLEnv $ \env -> lookupVarEnv (local_tyvar_pa env) tv 
@@ -384,7 +429,7 @@ initV hsc_env guts info p
     go instEnvs famInstEnvs = 
       do
         builtins <- initBuiltins
-        r <- runVM p builtins (initGlobalEnv info instEnvs famInstEnvs) 
+        r <- runVM p builtins (initGlobalEnv info instEnvs famInstEnvs builtins) 
                    emptyLocalEnv
         case r of
           Yes genv _ x -> return $ Just (new_info genv, x)