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 */ 23package org.graalvm.compiler.core.common.type; 24 25import java.nio.ByteBuffer; 26import java.util.Objects; 27 28import jdk.vm.ci.meta.SerializableConstant; 29 30/** 31 * Type describing values that support arithmetic operations. 32 */ 33public 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 if (this.isCompatible(other)) { 50 return this.join(other); 51 } 52 // Cannot improve, because stamps are not compatible. 53 return this; 54 } 55 56 @Override 57 public int hashCode() { 58 final int prime = 31; 59 int result = 1; 60 result = prime * result + ops.hashCode(); 61 return result; 62 } 63 64 @Override 65 public boolean equals(Object obj) { 66 if (this == obj) { 67 return true; 68 } 69 if (!(obj instanceof ArithmeticStamp)) { 70 return false; 71 } 72 assert Objects.equals(ops, ((ArithmeticStamp) obj).ops) : ops + " vs. " + ((ArithmeticStamp) obj).ops; 73 return true; 74 } 75} 76