/*

 * Copyright (c) 2019, 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 org.graalvm.compiler.replacements.nodes;

import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_8;

import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_8;

import org.graalvm.compiler.core.common.type.StampFactory;

import org.graalvm.compiler.graph.NodeClass;

import org.graalvm.compiler.nodeinfo.InputType;

import org.graalvm.compiler.nodeinfo.NodeInfo;

import org.graalvm.compiler.nodes.ValueNode;

import org.graalvm.compiler.nodes.memory.FixedAccessNode;

import org.graalvm.compiler.nodes.memory.address.AddressNode;

import org.graalvm.compiler.nodes.memory.address.OffsetAddressNode;

import org.graalvm.compiler.nodes.spi.LIRLowerable;

import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;

import org.graalvm.compiler.word.Word;

import jdk.internal.vm.compiler.word.LocationIdentity;

/**

 * Zeros a chunk of memory.

 */

@NodeInfo(nameTemplate = "ZeroMemory#{p#location/s}", allowedUsageTypes = {InputType.Memory}, cycles = CYCLES_8, size = SIZE_8)

public class ZeroMemoryNode extends FixedAccessNode implements LIRLowerable {

    public static final NodeClass<ZeroMemoryNode> TYPE = NodeClass.create(ZeroMemoryNode.class);

    @Input ValueNode length;

    private final boolean isAligned;

    public ZeroMemoryNode(ValueNode address, ValueNode length, boolean isAligned, LocationIdentity locationIdentity) {

        this(OffsetAddressNode.create(address), length, isAligned, locationIdentity, BarrierType.NONE);

    }

    public ZeroMemoryNode(AddressNode address, ValueNode length, boolean isAligned, LocationIdentity locationIdentity, BarrierType type) {

        super(TYPE, address, locationIdentity, StampFactory.forVoid(), type);

        this.length = length;

        this.isAligned = isAligned;

    }

    @Override

    public void generate(NodeLIRBuilderTool gen) {

        gen.getLIRGeneratorTool().emitZeroMemory(gen.operand(getAddress()), gen.operand(length), isAligned);

    }

    @Override

    public boolean canNullCheck() {

        return false;

    }

    @NodeIntrinsic

    public static native void zero(Word address, long length, @ConstantNodeParameter boolean isAligned, @ConstantNodeParameter LocationIdentity locationIdentity);

}