Nicer names for hoisted functions

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

diff --git a/compiler/vectorise/VectMonad.hs b/compiler/vectorise/VectMonad.hs
index ed18f1f..86b1cb7 100644 (file)
--- a/compiler/vectorise/VectMonad.hs
+++ b/compiler/vectorise/VectMonad.hs
@@ -3,7 +3,7 @@ module VectMonad (
   VM,
 
   noV, tryV, maybeV, orElseV, fixV, localV, closedV, initV,
-  cloneName, newLocalVar, newTyVar,
+  cloneName, newExportedVar, newLocalVar, newDummyVar, newTyVar,
   
   Builtins(..), paDictTyCon, paDictDataCon,
   builtin,
@@ -15,6 +15,8 @@ module VectMonad (
   LocalEnv(..),
   readLEnv, setLEnv, updLEnv,
 
+  getBindName, inBind,
+
   lookupVar, defGlobalVar,
   lookupTyCon, defTyCon,
   lookupDataCon, defDataCon,
@@ -47,6 +49,7 @@ import FamInstEnv
 import Panic
 import Outputable
 import FastString
+import SrcLoc        ( noSrcSpan )
 
 import Control.Monad ( liftM )
 
@@ -105,7 +108,7 @@ initBuiltins
 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
                   --
@@ -139,7 +142,7 @@ 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
                  --
@@ -147,13 +150,16 @@ data LocalEnv = LocalEnv {
 
                  -- Mapping from tyvars to their PA dictionaries
                , local_tyvar_pa :: VarEnv CoreExpr
+
+                 -- Local binding name
+               , local_bind_name :: FastString
                }
               
 
 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        = extendNameEnv (mapNameEnv snd (vectInfoTyCon info))
                                            (tyConName funTyCon) (closureTyCon bi)
@@ -175,6 +181,7 @@ emptyLocalEnv = LocalEnv {
                    local_vars     = emptyVarEnv
                  , local_tyvars   = []
                  , local_tyvar_pa = emptyVarEnv
+                 , local_bind_name  = FSLIT("fn")
                  }
 
 -- FIXME
@@ -235,7 +242,7 @@ localV p = do
 closedV :: VM a -> VM a
 closedV p = do
               env <- readLEnv id
-              setLEnv emptyLocalEnv
+              setLEnv (emptyLocalEnv { local_bind_name = local_bind_name env })
               x <- p
               setLEnv env
               return x
@@ -270,6 +277,14 @@ getInstEnv = readGEnv global_inst_env
 getFamInstEnv :: VM FamInstEnvs
 getFamInstEnv = readGEnv global_fam_inst_env
 
+getBindName :: VM FastString
+getBindName = readLEnv local_bind_name
+
+inBind :: Id -> VM a -> VM a
+inBind id p
+  = do updLEnv $ \env -> env { local_bind_name = occNameFS (getOccName id) }
+       p
+
 cloneName :: (OccName -> OccName) -> Name -> VM Name
 cloneName mk_occ name = liftM make (liftDs newUnique)
   where
@@ -280,12 +295,25 @@ 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
@@ -294,14 +322,14 @@ 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