Mercurial > hg > graal-jvmci-8
view graal/com.oracle.max.graal.compiler/src/com/oracle/max/graal/compiler/nodes/base/EndNode.java @ 3529:d683f8a40c05
Second round of refactoring.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Wed, 10 Aug 2011 00:34:29 +0200 |
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/* * Copyright (c) 2011, 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 com.oracle.max.graal.compiler.nodes.base; import java.util.*; import com.oracle.max.graal.compiler.nodes.spi.*; import com.oracle.max.graal.graph.*; import com.sun.cri.ci.*; public final class EndNode extends FixedNode { public EndNode(Graph graph) { super(CiKind.Illegal, graph); } @Override public void accept(ValueVisitor v) { v.visitEndNode(this); } public MergeNode merge() { if (usages().size() == 0) { return null; } else { assert usages().size() == 1; return (MergeNode) usages().iterator().next(); } } @Override public boolean verify() { assertTrue(usages().size() <= 1, "at most one usage"); return true; } @Override public Iterable< ? extends Node> dataUsages() { return Collections.emptyList(); } @Override public Iterable< ? extends Node> cfgSuccessors() { MergeNode merge = this.merge(); if (merge == null) { return Collections.emptyList(); } return Arrays.asList(merge); } }