--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/optinfo-emit-json.h	Thu Oct 25 07:37:49 2018 +0900
@@ -0,0 +1,36 @@
+/* Emit optimization information as JSON files.
+   Copyright (C) 2018 Free Software Foundation, Inc.
+   Contributed by David Malcolm <dmalcolm@redhat.com>.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+#ifndef GCC_OPTINFO_EMIT_JSON_H
+#define GCC_OPTINFO_EMIT_JSON_H
+
+class optinfo;
+struct opt_pass;
+
+extern void optimization_records_start ();
+extern void optimization_records_finish ();
+
+extern bool optimization_records_enabled_p ();
+
+extern void optimization_records_maybe_record_optinfo (const optinfo *);
+extern void optimization_records_maybe_pop_dump_scope ();
+
+
+#endif /* #ifndef GCC_OPTINFO_EMIT_JSON_H */