Mercurial > hg > graal-compiler
view graal/com.oracle.truffle.api.test/src/com/oracle/truffle/api/test/ChildNodeTest.java @ 13291:01fd11e44f73
Access is not necessarily a DeoptimizingNode. In particular, FloatingAccessNodes are not DeoptimizingNode.
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Wed, 11 Dec 2013 14:23:58 +0100 |
parents | df1d665ca846 |
children | a08b8694f556 |
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/* * Copyright (c) 2012, 2013, 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.truffle.api.test; import java.util.*; import org.junit.*; import com.oracle.truffle.api.*; import com.oracle.truffle.api.frame.*; import com.oracle.truffle.api.nodes.*; import com.oracle.truffle.api.nodes.Node.Child; /** * <h3>Creating a Child Node</h3> * * <p> * Child nodes are stored in the class of the parent node in fields that are marked with the * {@link Child} annotation. Before such a field is assigned, {@link Node#adoptChild} must be * called. This method automatically establishes a link from the child to the parent. The * {@link Node#getParent()} method allows access to this field. Every node also provides the ability * to iterate over its children using {@link Node#getChildren()}. * </p> * * <p> * A child node field must be declared private and non-final. It may only be assigned in the * constructor of the parent node. For changing the structure of the tree at run time, the method * {@link Node#replace(Node)} must be used (see {@link ReplaceTest}). * </p> * * <p> * The next part of the Truffle API introduction is at * {@link com.oracle.truffle.api.test.ChildrenNodesTest}. * </p> */ public class ChildNodeTest { @Test public void test() { TruffleRuntime runtime = Truffle.getRuntime(); TestChildNode leftChild = new TestChildNode(); TestChildNode rightChild = new TestChildNode(); TestRootNode rootNode = new TestRootNode(leftChild, rightChild); Assert.assertEquals(rootNode, leftChild.getParent()); Assert.assertEquals(rootNode, rightChild.getParent()); Iterator<Node> iterator = rootNode.getChildren().iterator(); Assert.assertEquals(leftChild, iterator.next()); Assert.assertEquals(rightChild, iterator.next()); Assert.assertFalse(iterator.hasNext()); CallTarget target = runtime.createCallTarget(rootNode); Object result = target.call(); Assert.assertEquals(42, result); } class TestRootNode extends RootNode { @Child private TestChildNode left; @Child private TestChildNode right; public TestRootNode(TestChildNode left, TestChildNode right) { super(null); this.left = adoptChild(left); this.right = adoptChild(right); } @Override public Object execute(VirtualFrame frame) { return left.execute() + right.execute(); } } class TestChildNode extends Node { public TestChildNode() { super(null); } public int execute() { return 21; } } }