src/hotspot/share/c1/c1_ValueSet.hpp

/*
 * Copyright (c) 2001, 2019, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
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#ifndef SHARE_C1_C1_VALUESET_HPP
#define SHARE_C1_C1_VALUESET_HPP

#include "c1/c1_Instruction.hpp"
#include "utilities/bitMap.hpp"

// A ValueSet is a simple abstraction on top of a BitMap representing
// a set of Instructions. Currently it assumes that the number of
// instructions is fixed during its lifetime; should make it
// automatically resizable.

class ValueSet: public CompilationResourceObj {
 private:
  ResourceBitMap _map;

 public:
  ValueSet() : _map(Instruction::number_of_instructions()) {}

  ValueSet* copy() {
    ValueSet* res = new ValueSet();
    res->_map.set_from(_map);
    return res;
  }
  bool contains(Value x)              { return _map.at(x->id()); }
  void put(Value x)                   { _map.set_bit(x->id()); }
  void remove(Value x)                { _map.clear_bit(x->id()); }
  bool set_intersect(ValueSet* other) { return _map.set_intersection_with_result(other->_map); }
  void set_union(ValueSet* other)     { _map.set_union(other->_map); }
  void clear()                        { _map.clear(); }
  void set_from(ValueSet* other)      { _map.set_from(other->_map); }
  bool equals(ValueSet* other)        { return _map.is_same(other->_map); }
};

#endif // SHARE_C1_C1_VALUESET_HPP