DimensionsNode.java revision 12651:6ef01bd40ce2 
1/*
2 * Copyright (c) 2012, 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.asm.NumUtil.roundUp;
26import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_2;
27import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_1;
28
29import java.util.BitSet;
30
31import org.graalvm.compiler.core.common.type.StampFactory;
32import org.graalvm.compiler.graph.NodeClass;
33import org.graalvm.compiler.lir.VirtualStackSlot;
34import org.graalvm.compiler.lir.gen.LIRGeneratorTool;
35import org.graalvm.compiler.nodeinfo.NodeInfo;
36import org.graalvm.compiler.nodes.FixedWithNextNode;
37import org.graalvm.compiler.nodes.spi.LIRLowerable;
38import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;
39import org.graalvm.compiler.word.Word;
40import org.graalvm.compiler.word.WordTypes;
41
42import jdk.vm.ci.meta.Value;
43
44/**
45 * Intrinsic for allocating an on-stack array of integers to hold the dimensions of a multianewarray
46 * instruction.
47 */
48@NodeInfo(cycles = CYCLES_2, size = SIZE_1)
49public final class DimensionsNode extends FixedWithNextNode implements LIRLowerable {
50
51    public static final NodeClass<DimensionsNode> TYPE = NodeClass.create(DimensionsNode.class);
52    protected final int rank;
53
54    public DimensionsNode(@InjectedNodeParameter WordTypes wordTypes, int rank) {
55        super(TYPE, StampFactory.forKind(wordTypes.getWordKind()));
56        this.rank = rank;
57    }
58
59    @Override
60    public void generate(NodeLIRBuilderTool gen) {
61        LIRGeneratorTool lirGen = gen.getLIRGeneratorTool();
62        int size = rank * 4;
63        int wordSize = lirGen.target().wordSize;
64        int slots = roundUp(size, wordSize) / wordSize;
65        VirtualStackSlot array = lirGen.getResult().getFrameMapBuilder().allocateStackSlots(slots, new BitSet(0), null);
66        Value result = lirGen.emitAddress(array);
67        gen.setResult(this, result);
68    }
69
70    @NodeIntrinsic
71    public static native Word allocaDimsArray(@ConstantNodeParameter int rank);
72}
73