src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.replacements/src/org/graalvm/compiler/replacements/nodes/ZeroMemoryNode.java
/*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* 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).
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* 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.
*/
@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);
}