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+%# -*- mode:c; style:ruby; coding: utf-8; indent-tabs-mode: nil -*-
+%# Copyright (c) 2017 Urabe, Shyouhei. All rights reserved.
+%#
+%# This file is a part of the programming language Ruby. Permission is hereby
+%# granted, to either redistribute and/or modify this file, provided that the
+%# conditions mentioned in the file COPYING are met. Consult the file for
+%# details.
+CONSTFUNC(MAYBE_UNUSED(static int insn_len(VALUE insn)));
+extern const char rb_vm_insn_len_info[];
+
+#ifdef RUBY_VM_INSNS_INFO
+const char rb_vm_insn_len_info[] = {
+% RubyVM::Instructions.each_slice 25 do |a|
+ <%= a.map(&:width).join(', ') -%>,
+% end
+};
+#endif
+
+int
+insn_len(VALUE i)
+{
+ return rb_vm_insn_len_info[i];
+}