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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * published by the Free Software Foundation.
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 * 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.
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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.
/** * 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); }