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.lir; 24 25 import jdk.vm.ci.code.StackSlot; 26 import jdk.vm.ci.meta.AllocatableValue; 27 import jdk.vm.ci.meta.ValueKind; 28 29 /** 30 * {@link VirtualStackSlot}s are stack slots that are not yet fixed to specific frame offset. They 31 * are replaced by real {@link StackSlot}s with a fixed position in the frame before code emission. 32 */ 33 public abstract class VirtualStackSlot extends AllocatableValue { 34 35 private final int id; 36 37 public VirtualStackSlot(int id, ValueKind<?> kind) { 38 super(kind); 39 this.id = id; 40 } 41 42 public int getId() { 43 return id; 44 } 45 46 @Override 47 public String toString() { 48 return "vstack:" + id + getKindSuffix(); 49 } 50 51 @Override 52 public int hashCode() { 53 final int prime = 31; 54 int result = super.hashCode(); 55 result = prime * result + id; 56 return result; 57 } 58 59 @Override 60 public boolean equals(Object obj) { 61 if (this == obj) { 62 return true; 63 } 64 if (!super.equals(obj)) { 65 return false; 66 } 67 if (getClass() != obj.getClass()) { 68 return false; 69 } 70 VirtualStackSlot other = (VirtualStackSlot) obj; 71 if (id != other.id) { 72 return false; 73 } 74 return true; 75 } 76 77 }