001/*
002 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation.
008 *
009 * This code is distributed in the hope that it will be useful, but WITHOUT
010 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
011 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
012 * version 2 for more details (a copy is included in the LICENSE file that
013 * accompanied this code).
014 *
015 * You should have received a copy of the GNU General Public License version
016 * 2 along with this work; if not, write to the Free Software Foundation,
017 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
018 *
019 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
020 * or visit www.oracle.com if you need additional information or have any
021 * questions.
022 */
023package com.oracle.graal.hotspot.nodes;
024
025import static com.oracle.graal.asm.NumUtil.*;
026
027import java.util.*;
028
029import jdk.internal.jvmci.code.*;
030import jdk.internal.jvmci.meta.*;
031
032import com.oracle.graal.compiler.common.type.*;
033import com.oracle.graal.graph.*;
034import com.oracle.graal.lir.gen.*;
035import com.oracle.graal.nodeinfo.*;
036import com.oracle.graal.nodes.*;
037import com.oracle.graal.nodes.spi.*;
038import com.oracle.graal.word.*;
039
040/**
041 * Intrinsic for allocating an on-stack array of integers to hold the dimensions of a multianewarray
042 * instruction.
043 */
044@NodeInfo
045public final class DimensionsNode extends FixedWithNextNode implements LIRLowerable {
046
047    public static final NodeClass<DimensionsNode> TYPE = NodeClass.create(DimensionsNode.class);
048    protected final int rank;
049
050    public DimensionsNode(@InjectedNodeParameter WordTypes wordTypes, int rank) {
051        super(TYPE, StampFactory.forKind(wordTypes.getWordKind()));
052        this.rank = rank;
053    }
054
055    @Override
056    public void generate(NodeLIRBuilderTool gen) {
057        LIRGeneratorTool lirGen = gen.getLIRGeneratorTool();
058        int size = rank * 4;
059        int wordSize = lirGen.target().wordSize;
060        int slots = roundUp(size, wordSize) / wordSize;
061        VirtualStackSlot array = lirGen.getResult().getFrameMapBuilder().allocateStackSlots(slots, new BitSet(0), null);
062        Value result = lirGen.emitAddress(array);
063        gen.setResult(this, result);
064    }
065
066    @NodeIntrinsic
067    public static native Word allocaDimsArray(@ConstantNodeParameter int rank);
068}