Make it clear when the symbols are using by the interpreter.

ghc/compiler/main/HscMain.lhs

@@ -32,6 +32,8 @@ import Linker		( HValue, linkExpr )
 import CoreTidy		( tidyExpr )
 import CorePrep		( corePrepExpr )
 import Flattening	( flattenExpr )
+import Desugar          ( deSugarExpr )
+import SimplCore        ( simplifyExpr )
 import TcRnDriver	( tcRnStmt, tcRnExpr, tcRnType ) 
 import Type		( Type )
 import PrelNames	( iNTERACTIVE )
@@ -58,7 +60,7 @@ import IfaceEnv		( initNameCache )
 import LoadIface	( ifaceStats, initExternalPackageState )
 import PrelInfo		( wiredInThings, basicKnownKeyNames )
 import MkIface		( checkOldIface, mkIface, writeIfaceFile )
-import Desugar          ( deSugar, deSugarExpr )
+import Desugar          ( deSugar )
 import Flattening       ( flatten )
 import SimplCore        ( core2core, simplifyExpr )
 import TidyPgm		( tidyProgram, mkBootModDetails )