--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/run-rtl-passes.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,66 @@
+/* run-rtl-passes.c - Run RTL passes directly from frontend
+   Copyright (C) 2016-2017 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/>.  */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "target.h"
+#include "rtl.h"
+#include "function.h"
+#include "basic-block.h"
+#include "tree-pass.h"
+#include "context.h"
+#include "pass_manager.h"
+#include "bitmap.h"
+#include "df.h"
+#include "regs.h"
+#include "insn-attr-common.h" /* for INSN_SCHEDULING.  */
+#include "insn-attr.h" /* for init_sched_attrs.  */
+#include "run-rtl-passes.h"
+
+/* Run the backend passes, starting at the given pass.
+   Take ownership of INITIAL_PASS_NAME.  */
+
+void
+run_rtl_passes (char *initial_pass_name)
+{
+  cfun->pass_startwith = initial_pass_name;
+  max_regno = max_reg_num ();
+
+  /* Pass "expand" normally sets this up.  */
+#ifdef INSN_SCHEDULING
+  init_sched_attrs ();
+#endif
+
+  bitmap_obstack_initialize (NULL);
+  bitmap_obstack_initialize (&reg_obstack);
+
+  opt_pass *rest_of_compilation
+    = g->get_passes ()->get_rest_of_compilation ();
+  gcc_assert (rest_of_compilation);
+  execute_pass_list (cfun, rest_of_compilation);
+
+  opt_pass *clean_slate = g->get_passes ()->get_clean_slate ();
+  gcc_assert (clean_slate);
+  execute_pass_list (cfun, clean_slate);
+
+  bitmap_obstack_release (&reg_obstack);
+
+  cfun->curr_properties |= PROP_rtl;
+}