1 /*
   2  * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 package org.graalvm.compiler.core.common.type;
  24 
  25 import java.nio.ByteBuffer;
  26 import java.util.Objects;
  27 
  28 import jdk.vm.ci.meta.SerializableConstant;
  29 
  30 /**
  31  * Type describing values that support arithmetic operations.
  32  */
  33 public abstract class ArithmeticStamp extends Stamp {
  34 
  35     private final ArithmeticOpTable ops;
  36 
  37     protected ArithmeticStamp(ArithmeticOpTable ops) {
  38         this.ops = ops;
  39     }
  40 
  41     public ArithmeticOpTable getOps() {
  42         return ops;
  43     }
  44 
  45     public abstract SerializableConstant deserialize(ByteBuffer buffer);
  46 
  47     @Override
  48     public Stamp improveWith(Stamp other) {
  49         return this.join(other);
  50     }
  51 
  52     @Override
  53     public int hashCode() {
  54         final int prime = 31;
  55         int result = 1;
  56         result = prime * result + ops.hashCode();
  57         return result;
  58     }
  59 
  60     @Override
  61     public boolean equals(Object obj) {
  62         if (this == obj) {
  63             return true;
  64         }
  65         if (!(obj instanceof ArithmeticStamp)) {
  66             return false;
  67         }
  68         assert Objects.equals(ops, ((ArithmeticStamp) obj).ops);
  69         return true;
  70     }
  71 }