1/*
2 * Copyright (c) 2015, 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 */
23package org.graalvm.compiler.nodes.debug;
24
25import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_UNKNOWN;
26import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_UNKNOWN;
27
28import org.graalvm.compiler.core.common.type.StampFactory;
29import org.graalvm.compiler.graph.NodeClass;
30import org.graalvm.compiler.nodeinfo.NodeInfo;
31import org.graalvm.compiler.nodes.FixedWithNextNode;
32import org.graalvm.compiler.nodes.ValueNode;
33import org.graalvm.compiler.nodes.spi.LIRLowerable;
34import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;
35
36@NodeInfo(cycles = CYCLES_UNKNOWN, cyclesRationale = "Node is literally a blackhole", size = SIZE_UNKNOWN)
37public final class BlackholeNode extends FixedWithNextNode implements LIRLowerable {
38
39    public static final NodeClass<BlackholeNode> TYPE = NodeClass.create(BlackholeNode.class);
40    @Input ValueNode value;
41
42    public BlackholeNode(ValueNode value) {
43        super(TYPE, StampFactory.forVoid());
44        this.value = value;
45    }
46
47    @Override
48    public void generate(NodeLIRBuilderTool gen) {
49        gen.getLIRGeneratorTool().emitBlackhole(gen.operand(value));
50    }
51}
52