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+/* Header file for gimple range inference.
+   Copyright (C) 2022 Free Software Foundation, Inc.
+   Contributed by Andrew MacLeod <amacleod@redhat.com>.
+
+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_GIMPLE_RANGE_SIDE_H
+#define GCC_GIMPLE_RANGE_SIDE_H
+
+// Inferred ranges are ranges which are applied to use operands as a by product
+// of executing an operation.
+
+// This class manages an on-demand summary of inferred ranges for a statement.
+// It can be instantiated as required and provides a list of inferred ranges.
+// New inferred ranges should added in the constructor of this class.
+
+class gimple_infer_range
+{
+public:
+  gimple_infer_range (gimple *s);
+  inline unsigned num () const { return num_args; }
+  inline tree name (unsigned index) const
+    { gcc_checking_assert (index < num_args); return m_names[index]; }
+  inline const irange& range (unsigned index) const
+    { gcc_checking_assert (index < num_args); return m_ranges[index]; }
+  void add_range (tree name, irange &range);
+  void add_nonzero (tree name);
+private:
+  unsigned num_args;
+  static const int size_limit = 10;
+  tree m_names[size_limit];
+  int_range<3> m_ranges[size_limit];
+  inline void bump_index () { if (num_args < size_limit - 1) num_args++; }
+};
+
+// This class manages a list of inferred ranges for each basic block.
+// As inferences are made, they can be registered to a block and later
+// queried.  WHen constructed with a TRUE flag, immediate uses chains are
+// followed the first time a name is referenced and block populated if
+// there are any inferred ranges.
+
+class infer_range_manager
+{
+public:
+  infer_range_manager (bool do_search);
+  ~infer_range_manager ();
+  void add_range (tree name, basic_block bb, const irange &r);
+  void add_nonzero (tree name, basic_block bb);
+  bool has_range_p (tree name, basic_block bb);
+  bool maybe_adjust_range (irange &r, tree name, basic_block bb);
+private:
+  class exit_range_head
+  {
+  public:
+    bitmap m_names;		// list of names with an outgoing range.
+    class exit_range *head;
+    int m_num_ranges;
+    exit_range *find_ptr (tree name);
+  };
+  void register_all_uses (tree name);
+  vec <exit_range_head> m_on_exit;
+  const irange &get_nonzero (tree name);
+  vec <irange *> m_nonzero;
+  bitmap m_seen;
+  bitmap_obstack m_bitmaps;
+  struct obstack m_list_obstack;
+  irange_allocator m_range_allocator;
+};
+
+#endif // GCC_GIMPLE_RANGE_SIDE_H