| /* |
| * Copyright (c) 2011, 2012, 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.virtual.phases.ea; |
| |
| import java.util.Iterator; |
| import java.util.Map; |
| |
| public abstract class EffectsBlockState<T extends EffectsBlockState<T>> { |
| |
| /* |
| * This flag specifies whether this path that leads to this block is unreachable. |
| */ |
| private boolean dead; |
| |
| public EffectsBlockState() { |
| // emtpy |
| } |
| |
| public EffectsBlockState(EffectsBlockState<T> other) { |
| this.dead = other.dead; |
| } |
| |
| @Override |
| public String toString() { |
| return ""; |
| } |
| |
| protected abstract boolean equivalentTo(T other); |
| |
| public boolean isDead() { |
| return dead; |
| } |
| |
| public void markAsDead() { |
| this.dead = true; |
| } |
| |
| protected static <K, V> boolean compareMaps(Map<K, V> left, Map<K, V> right) { |
| if (left.size() != right.size()) { |
| return false; |
| } |
| return compareMapsNoSize(left, right); |
| } |
| |
| protected static <K, V> boolean compareMapsNoSize(Map<K, V> left, Map<K, V> right) { |
| if (left == right) { |
| return true; |
| } |
| for (Map.Entry<K, V> entry : right.entrySet()) { |
| K key = entry.getKey(); |
| V value = entry.getValue(); |
| assert value != null; |
| V otherValue = left.get(key); |
| if (otherValue != value && !value.equals(otherValue)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| protected static <U, V> void meetMaps(Map<U, V> target, Map<U, V> source) { |
| Iterator<Map.Entry<U, V>> iter = target.entrySet().iterator(); |
| while (iter.hasNext()) { |
| Map.Entry<U, V> entry = iter.next(); |
| if (source.containsKey(entry.getKey())) { |
| assert source.get(entry.getKey()) == entry.getValue(); |
| } else { |
| iter.remove(); |
| } |
| } |
| } |
| |
| } |