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 24 25 package org.graalvm.compiler.core.common.type; 26 27 import java.nio.ByteBuffer; 28 import java.util.Objects; 29 30 import jdk.vm.ci.meta.SerializableConstant; 31 32 /** 33 * Type describing values that support arithmetic operations. 34 */ 35 public abstract class ArithmeticStamp extends Stamp { 36 37 private final ArithmeticOpTable ops; 38 39 protected ArithmeticStamp(ArithmeticOpTable ops) { 40 this.ops = ops; 41 } 42 43 public ArithmeticOpTable getOps() { 44 return ops; 45 } 46 47 public abstract SerializableConstant deserialize(ByteBuffer buffer); 48 49 @Override 50 public Stamp improveWith(Stamp other) { 51 if (this.isCompatible(other)) { 52 return this.join(other); 53 } 54 // Cannot improve, because stamps are not compatible. 55 return this; 56 } 57 58 @Override 59 public int hashCode() { 60 final int prime = 31; 61 int result = 1; 62 result = prime * result + ops.hashCode(); 63 return result; 64 } 65 66 @Override 67 public boolean equals(Object obj) { 68 if (this == obj) { 69 return true; 70 } 71 if (!(obj instanceof ArithmeticStamp)) { 72 return false; 73 } 74 assert Objects.equals(ops, ((ArithmeticStamp) obj).ops) : ops + " vs. " + ((ArithmeticStamp) obj).ops; 75 return true; 76 } 77 }