--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/print-tree.h	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,47 @@
+/* Declarations for printing trees in human readable form
+   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_PRINT_TREE_H
+#define GCC_PRINT_TREE_H
+
+extern void debug_tree (tree);
+extern void debug_raw (const tree_node &ref);
+extern void debug_raw (const tree_node *ptr);
+extern void debug (const tree_node &ref);
+extern void debug (const tree_node *ptr);
+extern void debug_verbose (const tree_node &ref);
+extern void debug_verbose (const tree_node *ptr);
+extern void debug_head (const tree_node &ref);
+extern void debug_head (const tree_node *ptr);
+extern void debug_body (const tree_node &ref);
+extern void debug_body (const tree_node *ptr);
+extern void debug_vec_tree (vec<tree, va_gc> *);
+extern void debug (vec<tree, va_gc> &ref);
+extern void debug (vec<tree, va_gc> *ptr);
+extern void debug_raw (vec<tree, va_gc> &ref);
+extern void debug_raw (vec<tree, va_gc> *ptr);
+#ifdef BUFSIZ
+extern void dump_addr (FILE*, const char *, const void *);
+extern void print_node (FILE *, const char *, tree, int,
+			bool brief_for_visited = true);
+extern void print_node_brief (FILE *, const char *, const_tree, int);
+extern void indent_to (FILE *, int);
+#endif
+
+#endif  // GCC_PRINT_TREE_H