Add utility functions for accessing PA info during vectorisation

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

diff --git a/compiler/vectorise/VectMonad.hs b/compiler/vectorise/VectMonad.hs
index a991b8c..571350d 100644 (file)
--- a/compiler/vectorise/VectMonad.hs
+++ b/compiler/vectorise/VectMonad.hs
@@ -3,7 +3,8 @@ module VectMonad (
   VM,
 
   noV, tryV, maybeV, orElseV, fixV, localV, closedV, initV,
-  cloneName, newExportedVar, newLocalVar, newDummyVar, newTyVar,
+  cloneName, cloneId,
+  newExportedVar, newLocalVar, newDummyVar, newTyVar,
   
   Builtins(..), paDictTyCon, paDictDataCon,
   builtin,
@@ -20,6 +21,7 @@ module VectMonad (
   lookupVar, defGlobalVar,
   lookupTyCon, defTyCon,
   lookupDataCon, defDataCon,
+  lookupTyConPA, defTyConPA,
   lookupTyVarPA, defLocalTyVar, defLocalTyVarWithPA, localTyVars,
 
   lookupInst, lookupFamInst
@@ -130,6 +132,10 @@ data GlobalEnv = GlobalEnv {
                   --
                 , global_datacons :: NameEnv DataCon
 
+                  -- Mapping from TyCons to their PA dfuns
+                  --
+                , global_pa_funs :: NameEnv Var
+
                 -- External package inst-env & home-package inst-env for class
                 -- instances
                 --
@@ -171,6 +177,7 @@ initGlobalEnv info instEnvs famInstEnvs bi
                                            (tyConName funTyCon) (closureTyCon bi)
                               
     , global_datacons      = mapNameEnv snd $ vectInfoDataCon info
+    , global_pa_funs       = mapNameEnv snd $ vectInfoPADFun info
     , global_inst_env      = instEnvs
     , global_fam_inst_env  = famInstEnvs
     , global_bindings      = []
@@ -197,6 +204,7 @@ updVectInfo env tyenv info
       vectInfoVar     = global_exported_vars env
     , vectInfoTyCon   = mk_env typeEnvTyCons global_tycons
     , vectInfoDataCon = mk_env typeEnvDataCons global_datacons
+    , vectInfoPADFun  = mk_env typeEnvTyCons global_pa_funs
     }
   where
     mk_env from_tyenv from_env = mkNameEnv [(name, (from,to))
@@ -307,6 +315,14 @@ cloneName mk_occ name = liftM make (liftDs newUnique)
                                                     (nameSrcSpan name)
            | otherwise           = mkSystemName u occ_name
 
+cloneId :: (OccName -> OccName) -> Id -> Type -> VM Id
+cloneId mk_occ id ty
+  = do
+      name <- cloneName mk_occ (getName id)
+      let id' | isExportedId id = Id.mkExportedLocalId name ty
+              | otherwise       = Id.mkLocalId         name ty
+      return id'
+
 newExportedVar :: OccName -> Type -> VM Var
 newExportedVar occ_name ty 
   = do
@@ -368,6 +384,13 @@ defDataCon :: DataCon -> DataCon -> VM ()
 defDataCon dc dc' = updGEnv $ \env ->
   env { global_datacons = extendNameEnv (global_datacons env) (dataConName dc) dc' }
 
+lookupTyConPA :: TyCon -> VM (Maybe Var)
+lookupTyConPA tc = readGEnv $ \env -> lookupNameEnv (global_pa_funs env) (tyConName tc)
+
+defTyConPA :: TyCon -> Var -> VM ()
+defTyConPA tc pa = updGEnv $ \env ->
+  env { global_pa_funs = extendNameEnv (global_pa_funs env) (tyConName tc) pa }
+
 lookupTyVarPA :: Var -> VM (Maybe CoreExpr)
 lookupTyVarPA tv = readLEnv $ \env -> lookupVarEnv (local_tyvar_pa env) tv