ComputeObjectAddressNode.java revision 13017:134219a5b0ec 
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.hotspot.nodes;
24
25import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_1;
26
27import org.graalvm.compiler.core.common.type.StampFactory;
28import org.graalvm.compiler.graph.NodeClass;
29import org.graalvm.compiler.nodeinfo.NodeInfo;
30import org.graalvm.compiler.nodeinfo.NodeSize;
31import org.graalvm.compiler.nodes.FixedWithNextNode;
32import org.graalvm.compiler.nodes.ValueNode;
33import org.graalvm.compiler.nodes.debug.ControlFlowAnchored;
34import org.graalvm.compiler.nodes.spi.Lowerable;
35import org.graalvm.compiler.nodes.spi.LoweringTool;
36
37import jdk.vm.ci.meta.JavaKind;
38
39/**
40 * A high-level intrinsic for getting an address inside of an object. During lowering it will be
41 * moved next to any uses to avoid creating a derived pointer that is live across a safepoint.
42 */
43@NodeInfo(cycles = CYCLES_1, size = NodeSize.SIZE_1)
44public final class ComputeObjectAddressNode extends FixedWithNextNode implements Lowerable, ControlFlowAnchored {
45    public static final NodeClass<ComputeObjectAddressNode> TYPE = NodeClass.create(ComputeObjectAddressNode.class);
46
47    @Input ValueNode object;
48    @Input ValueNode offset;
49
50    public ComputeObjectAddressNode(ValueNode obj, ValueNode offset) {
51        super(TYPE, StampFactory.forKind(JavaKind.Long));
52        this.object = obj;
53        this.offset = offset;
54    }
55
56    @NodeIntrinsic
57    public static native long get(Object array, long offset);
58
59    @Override
60    public void lower(LoweringTool tool) {
61        tool.getLowerer().lower(this, tool);
62    }
63
64    public ValueNode getObject() {
65        return object;
66    }
67
68    public ValueNode getOffset() {
69        return offset;
70    }
71}
72