| /* |
| * Copyright (c) 2010, 2014, 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. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package org.graalvm.compiler.lir; |
| |
| import jdk.vm.ci.code.RegisterValue; |
| import jdk.vm.ci.code.StackSlot; |
| import jdk.vm.ci.meta.AllocatableValue; |
| import jdk.vm.ci.meta.ValueKind; |
| |
| /** |
| * Represents a value that is yet to be bound to a machine location (such as a {@link RegisterValue} |
| * or {@link StackSlot}) by a register allocator. |
| */ |
| public final class Variable extends AllocatableValue { |
| |
| /** |
| * The identifier of the variable. This is a non-zero index in a contiguous 0-based name space. |
| */ |
| public final int index; |
| |
| private String name; |
| |
| /** |
| * Creates a new variable. |
| * |
| * @param kind |
| * @param index |
| */ |
| public Variable(ValueKind<?> kind, int index) { |
| super(kind); |
| assert index >= 0; |
| this.index = index; |
| } |
| |
| public void setName(String name) { |
| this.name = name; |
| } |
| |
| public String getName() { |
| return name; |
| } |
| |
| @Override |
| public String toString() { |
| if (name != null) { |
| return name; |
| } else { |
| return "v" + index + getKindSuffix(); |
| } |
| } |
| |
| @Override |
| public int hashCode() { |
| return 71 * super.hashCode() + index; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (obj instanceof Variable) { |
| Variable other = (Variable) obj; |
| return super.equals(other) && index == other.index; |
| } |
| return false; |
| } |
| } |