--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/context.h	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,69 @@
+/* context.h - Holder for global state
+   Copyright (C) 2013-2017 Free Software Foundation, Inc.
+
+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_CONTEXT_H
+#define GCC_CONTEXT_H
+
+namespace gcc {
+
+class pass_manager;
+class dump_manager;
+
+/* GCC's internal state can be divided into zero or more
+   "parallel universe" of state; an instance of this class is one such
+   context of state.  */
+class context
+{
+public:
+  context ();
+  ~context ();
+
+  /* The flag shows if there are symbols to be streamed for offloading.  */
+  bool have_offload;
+
+  /* Pass-management.  */
+
+  void set_passes (pass_manager *m)
+  {
+    gcc_assert (!m_passes);
+    m_passes = m;
+  }
+
+  pass_manager *get_passes () { gcc_assert (m_passes); return m_passes; }
+
+  /* Handling dump files.  */
+
+  dump_manager *get_dumps () {gcc_assert (m_dumps); return m_dumps; }
+
+private:
+  /* Pass-management.  */
+  pass_manager *m_passes;
+
+  /* Dump files.  */
+  dump_manager *m_dumps;
+
+}; // class context
+
+} // namespace gcc
+
+/* The global singleton context aka "g".
+   (the name is chosen to be easy to type in a debugger).  */
+extern gcc::context *g;
+
+#endif /* ! GCC_CONTEXT_H */