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diff --git a/gcc/int-vector-builder.h b/gcc/int-vector-builder.h
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+/* A class for building vector integer constants.
+   Copyright (C) 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_INT_VECTOR_BUILDER_H
+#define GCC_INT_VECTOR_BUILDER_H 1
+
+#include "vector-builder.h"
+
+/* This class is used to build vectors of integer type T using the same
+   encoding as tree and rtx constants.  See vector_builder for more
+   details.  */
+template<typename T>
+class int_vector_builder : public vector_builder<T, int_vector_builder<T> >
+{
+  typedef vector_builder<T, int_vector_builder> parent;
+  friend class vector_builder<T, int_vector_builder>;
+
+public:
+  int_vector_builder () {}
+  int_vector_builder (unsigned int, unsigned int, unsigned int);
+
+  using parent::new_vector;
+
+private:
+  bool equal_p (T, T) const;
+  bool allow_steps_p () const { return true; }
+  bool integral_p (T) const { return true; }
+  T step (T, T) const;
+  T apply_step (T, unsigned int, T) const;
+  bool can_elide_p (T) const { return true; }
+  void note_representative (T *, T) {}
+};
+
+/* Create a new builder for a vector with FULL_NELTS elements.
+   Initially encode the value as NPATTERNS interleaved patterns with
+   NELTS_PER_PATTERN elements each.  */
+
+template<typename T>
+inline
+int_vector_builder<T>::int_vector_builder (unsigned int full_nelts,
+					   unsigned int npatterns,
+					   unsigned int nelts_per_pattern)
+{
+  new_vector (full_nelts, npatterns, nelts_per_pattern);
+}
+
+/* Return true if elements ELT1 and ELT2 are equal.  */
+
+template<typename T>
+inline bool
+int_vector_builder<T>::equal_p (T elt1, T elt2) const
+{
+  return elt1 == elt2;
+}
+
+/* Return the value of element ELT2 minus the value of element ELT1.  */
+
+template<typename T>
+inline T
+int_vector_builder<T>::step (T elt1, T elt2) const
+{
+  return elt2 - elt1;
+}
+
+/* Return a vector element with the value BASE + FACTOR * STEP.  */
+
+template<typename T>
+inline T
+int_vector_builder<T>::apply_step (T base, unsigned int factor, T step) const
+{
+  return base + factor * step;
+}
+
+#endif