src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.replacements.amd64/src/org/graalvm/compiler/replacements/amd64/AMD64StringUTF16CompressNode.java
/*
* Copyright (c) 2018, 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.amd64;
import static org.graalvm.compiler.nodeinfo.InputType.Memory;
import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_UNKNOWN;
import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_512;
import org.graalvm.compiler.core.common.type.StampFactory;
import org.graalvm.compiler.graph.NodeClass;
import org.graalvm.compiler.lir.gen.LIRGeneratorTool;
import org.graalvm.compiler.nodeinfo.NodeInfo;
import org.graalvm.compiler.nodes.FixedWithNextNode;
import org.graalvm.compiler.nodes.NamedLocationIdentity;
import org.graalvm.compiler.nodes.ValueNode;
import org.graalvm.compiler.nodes.ValueNodeUtil;
import org.graalvm.compiler.nodes.memory.MemoryAccess;
import org.graalvm.compiler.nodes.memory.MemoryCheckpoint;
import org.graalvm.compiler.nodes.memory.MemoryNode;
import org.graalvm.compiler.nodes.spi.LIRLowerable;
import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;
import jdk.internal.vm.compiler.word.LocationIdentity;
import jdk.internal.vm.compiler.word.Pointer;
import jdk.vm.ci.meta.JavaKind;
import jdk.vm.ci.meta.Value;
@NodeInfo(allowedUsageTypes = Memory, size = SIZE_512, cycles = CYCLES_UNKNOWN)
public final class AMD64StringUTF16CompressNode extends FixedWithNextNode
implements LIRLowerable, MemoryCheckpoint.Multi, MemoryAccess {
public static final NodeClass<AMD64StringUTF16CompressNode> TYPE = NodeClass.create(AMD64StringUTF16CompressNode.class);
@Input private ValueNode src;
@Input private ValueNode dst;
@Input private ValueNode len;
final JavaKind readKind;
@OptionalInput(Memory) private MemoryNode lla; // Last access location registered.
// java.lang.StringUTF16.compress([CI[BII)I
//
// int compress(char[] src, int src_indx, byte[] dst, int dst_indx, int len)
//
// Represented as a graph node by:
public AMD64StringUTF16CompressNode(ValueNode src, ValueNode dst, ValueNode len, JavaKind readKind) {
super(TYPE, StampFactory.forInteger(32));
this.src = src;
this.dst = dst;
this.len = len;
this.readKind = readKind;
}
@Override
public LocationIdentity getLocationIdentity() {
// Model read access via 'src' using:
return NamedLocationIdentity.getArrayLocation(readKind);
}
@Override
public LocationIdentity[] getKilledLocationIdentities() {
// Model write access via 'dst' using:
return new LocationIdentity[]{NamedLocationIdentity.getArrayLocation(JavaKind.Byte)};
}
@Override
public void generate(NodeLIRBuilderTool gen) {
LIRGeneratorTool lgt = gen.getLIRGeneratorTool();
Value res = lgt.emitStringUTF16Compress(gen.operand(src), gen.operand(dst), gen.operand(len));
gen.setResult(this, res);
}
@Override
public MemoryNode getLastLocationAccess() {
return lla;
}
@Override
public void setLastLocationAccess(MemoryNode newlla) {
updateUsages(ValueNodeUtil.asNode(lla), ValueNodeUtil.asNode(newlla));
lla = newlla;
}
@NodeIntrinsic
public static native int compress(Pointer src, Pointer dst, int len, @ConstantNodeParameter JavaKind readKind);
}