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diff --git a/tool/ruby_vm/views/_insn_name_info.erb b/tool/ruby_vm/views/_insn_name_info.erb
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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 const char *insn_name(VALUE insn)));
+
+const char *
+insn_name(VALUE i)
+{
+ static const unsigned short o[] = {
+% a = RubyVM::Instructions.map {|i| i.name }
+% o = 0
+% a.each_slice 12 do |b|
+ <%= b.map {|i|
+ j = o; o += i.size + 1; sprintf("%4d", j)
+ }.join(', ') %>,
+% end
+ };
+ static const char t[] = {
+% a.each_slice 2 do |b|
+ <%= b.map {|i| sprintf("%-30s", cstr(i)) }.join(' "\0" ') %> "\0"
+% end
+ };
+
+ ASSERT_VM_INSTRUCTION_SIZE(o);
+ return &t[o[i]];
+}