re PR c++/37450 (C++ FE times out on duplicated parameter)

2008-09-17  H.J. Lu  <hongjiu.lu@intel.com>

	PR c++/37450
	* name-lookup.c (pushdecl_maybe_friend): Don't return the old
	parameter for duplicate.

From-SVN: r140425

gcc/cp/ChangeLog

+2008-09-17  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR c++/37450
+	* name-lookup.c (pushdecl_maybe_friend): Don't return the old
+	parameter for duplicate.
+
 2008-09-17  Jason Merrill  <jason@redhat.com>
 
 	PR c++/37588

gcc/cp/name-lookup.c

@@ -720,8 +720,9 @@ pushdecl_maybe_friend (tree x, bool is_friend)
 	  else if (TREE_CODE (t) == PARM_DECL)
 	    {
 	      /* Check for duplicate params.  */
-	      if (duplicate_decls (x, t, is_friend))
-		POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
+	      tree d = duplicate_decls (x, t, is_friend);
+	      if (d)
+		POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, d);
 	    }
 	  else if ((DECL_EXTERN_C_FUNCTION_P (x)
 		    || DECL_FUNCTION_TEMPLATE_P (x))