X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2Ftypecheck%2FTcRnMonad.lhs;h=553fe5be2b4dad2941cd802e28e6fda11d5e28df;hb=d93785d99261a433075dcbac8c388730a4dec64f;hp=65128baf4e7702aa6f3c966277a2ca8fd0ea9454;hpb=94bf0d3604ff0d2ecab246924af712bdd1c29a40;p=ghc-hetmet.git

diff --git a/compiler/typecheck/TcRnMonad.lhs b/compiler/typecheck/TcRnMonad.lhs
index 65128ba..553fe5b 100644
--- a/compiler/typecheck/TcRnMonad.lhs
+++ b/compiler/typecheck/TcRnMonad.lhs
@@ -71,8 +71,7 @@ initTc hsc_env hsc_src keep_rn_syntax mod do_this
  = do { errs_var     <- newIORef (emptyBag, emptyBag) ;
         meta_var     <- newIORef initTyVarUnique ;
       	tvs_var      <- newIORef emptyVarSet ;
-	dfuns_var    <- newIORef emptyNameSet ;
-	keep_var     <- newIORef emptyNameSet ;
+        keep_var     <- newIORef emptyNameSet ;
         used_rdr_var <- newIORef Set.empty ;
 	th_var	     <- newIORef False ;
 	lie_var	     <- newIORef emptyBag ;
@@ -97,8 +96,7 @@ initTc hsc_env hsc_src keep_rn_syntax mod do_this
 		tcg_type_env_var = type_env_var,
 		tcg_inst_env  = emptyInstEnv,
 		tcg_fam_inst_env  = emptyFamInstEnv,
-		tcg_inst_uses = dfuns_var,
-		tcg_th_used   = th_var,
+                tcg_th_used   = th_var,
 		tcg_exports  = [],
 		tcg_imports  = emptyImportAvails,
                 tcg_used_rdrnames = used_rdr_var,
@@ -610,6 +608,14 @@ addLongErrAt loc msg extra
 	 let { err = mkLongErrMsg loc (mkPrintUnqualified dflags rdr_env) msg extra } ;
 	 (warns, errs) <- readTcRef errs_var ;
   	 writeTcRef errs_var (warns, errs `snocBag` err) }
+
+dumpDerivingInfo :: SDoc -> TcM ()
+dumpDerivingInfo doc
+  = do { dflags <- getDOpts
+       ; when (dopt Opt_D_dump_deriv dflags) $ do
+       { rdr_env <- getGlobalRdrEnv
+       ; let unqual = mkPrintUnqualified dflags rdr_env
+       ; liftIO (putMsgWith dflags unqual doc) } }
 \end{code}