--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/config/i386/clzerointrin.h	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,44 @@
+/* Copyright (C) 2012-2017 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.
+
+   Under Section 7 of GPL version 3, you are granted additional
+   permissions described in the GCC Runtime Library Exception, version
+   3.1, as published by the Free Software Foundation.
+
+   You should have received a copy of the GNU General Public License and
+   a copy of the GCC Runtime Library Exception along with this program;
+   see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _CLZEROINTRIN_H_INCLUDED
+#define _CLZEROINTRIN_H_INCLUDED
+
+#ifndef __CLZERO__
+#pragma GCC push_options
+#pragma GCC target("clzero")
+#define __DISABLE_CLZERO__
+#endif /* __CLZERO__ */
+
+extern __inline void __attribute__((__gnu_inline__, __always_inline__, __artificial__))
+_mm_clzero (void * __I)
+{
+  __builtin_ia32_clzero (__I);
+}
+
+#ifdef __DISABLE_CLZERO__
+#undef __DISABLE_CLZERO__
+#pragma GCC pop_options
+#endif /* __DISABLE_CLZERO__ */
+
+#endif /* _CLZEROINTRIN_H_INCLUDED */