/*
* Copyright (c) 2014, 2016, 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.
*/
//JaCoCo Exclude
package org.graalvm.compiler.hotspot.replacements.arraycopy;
import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_UNKNOWN;
import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_UNKNOWN;
import static jdk.vm.ci.hotspot.HotSpotJVMCIRuntimeProvider.getArrayBaseOffset;
import static jdk.vm.ci.hotspot.HotSpotJVMCIRuntimeProvider.getArrayIndexScale;
import org.graalvm.compiler.core.common.LocationIdentity;
import org.graalvm.compiler.core.common.spi.ForeignCallDescriptor;
import org.graalvm.compiler.core.common.type.StampFactory;
import org.graalvm.compiler.graph.NodeClass;
import org.graalvm.compiler.hotspot.HotSpotGraalRuntimeProvider;
import org.graalvm.compiler.hotspot.meta.HotSpotHostForeignCallsProvider;
import org.graalvm.compiler.hotspot.nodes.GetObjectAddressNode;
import org.graalvm.compiler.nodeinfo.InputType;
import org.graalvm.compiler.nodeinfo.NodeInfo;
import org.graalvm.compiler.nodes.ConstantNode;
import org.graalvm.compiler.nodes.FixedWithNextNode;
import org.graalvm.compiler.nodes.StructuredGraph;
import org.graalvm.compiler.nodes.ValueNode;
import org.graalvm.compiler.nodes.calc.AddNode;
import org.graalvm.compiler.nodes.calc.IntegerConvertNode;
import org.graalvm.compiler.nodes.calc.LeftShiftNode;
import org.graalvm.compiler.nodes.extended.ForeignCallNode;
import org.graalvm.compiler.nodes.memory.AbstractMemoryCheckpoint;
import org.graalvm.compiler.nodes.memory.MemoryCheckpoint;
import org.graalvm.compiler.nodes.memory.address.OffsetAddressNode;
import org.graalvm.compiler.nodes.spi.Lowerable;
import org.graalvm.compiler.nodes.spi.LoweringTool;
import org.graalvm.compiler.word.Word;
import jdk.vm.ci.code.CodeUtil;
import jdk.vm.ci.meta.JavaKind;
@NodeInfo(allowedUsageTypes = {InputType.Memory, InputType.Value}, cycles = CYCLES_UNKNOWN, size = SIZE_UNKNOWN)
public final class CheckcastArrayCopyCallNode extends AbstractMemoryCheckpoint implements Lowerable, MemoryCheckpoint.Single {
public static final NodeClass<CheckcastArrayCopyCallNode> TYPE = NodeClass.create(CheckcastArrayCopyCallNode.class);
@Input ValueNode src;
@Input ValueNode srcPos;
@Input ValueNode dest;
@Input ValueNode destPos;
@Input ValueNode length;
@Input ValueNode destElemKlass;
@Input ValueNode superCheckOffset;
protected final boolean uninit;
protected final HotSpotGraalRuntimeProvider runtime;
protected CheckcastArrayCopyCallNode(@InjectedNodeParameter HotSpotGraalRuntimeProvider runtime, ValueNode src, ValueNode srcPos, ValueNode dest, ValueNode destPos, ValueNode length,
ValueNode superCheckOffset, ValueNode destElemKlass, boolean uninit) {
super(TYPE, StampFactory.forKind(JavaKind.Int));
this.src = src;
this.srcPos = srcPos;
this.dest = dest;
this.destPos = destPos;
this.length = length;
this.superCheckOffset = superCheckOffset;
this.destElemKlass = destElemKlass;
this.uninit = uninit;
this.runtime = runtime;
}
public ValueNode getSource() {
return src;
}
public ValueNode getSourcePosition() {
return srcPos;
}
public ValueNode getDestination() {
return dest;
}
public ValueNode getDestinationPosition() {
return destPos;
}
public ValueNode getLength() {
return length;
}
public boolean isUninit() {
return uninit;
}
private ValueNode computeBase(ValueNode base, ValueNode pos) {
FixedWithNextNode basePtr = graph().add(new GetObjectAddressNode(base));
graph().addBeforeFixed(this, basePtr);
int shift = CodeUtil.log2(getArrayIndexScale(JavaKind.Object));
ValueNode scaledIndex = graph().unique(new LeftShiftNode(pos, ConstantNode.forInt(shift, graph())));
ValueNode offset = graph().unique(new AddNode(scaledIndex, ConstantNode.forInt(getArrayBaseOffset(JavaKind.Object), graph())));
return graph().unique(new OffsetAddressNode(basePtr, offset));
}
@Override
public void lower(LoweringTool tool) {
if (graph().getGuardsStage().areFrameStatesAtDeopts()) {
ForeignCallDescriptor desc = HotSpotHostForeignCallsProvider.lookupCheckcastArraycopyDescriptor(isUninit());
StructuredGraph graph = graph();
ValueNode srcAddr = computeBase(getSource(), getSourcePosition());
ValueNode destAddr = computeBase(getDestination(), getDestinationPosition());
ValueNode len = getLength();
if (len.stamp().getStackKind() != runtime.getTarget().wordJavaKind) {
len = IntegerConvertNode.convert(len, StampFactory.forKind(runtime.getTarget().wordJavaKind), graph());
}
ForeignCallNode call = graph.add(new ForeignCallNode(runtime.getHostBackend().getForeignCalls(), desc, srcAddr, destAddr, len, superCheckOffset, destElemKlass));
call.setStateAfter(stateAfter());
graph.replaceFixedWithFixed(this, call);
}
}
@Override
public LocationIdentity getLocationIdentity() {
/*
* Because of restrictions that the memory graph of snippets matches the original node,
* pretend that we kill any.
*/
return LocationIdentity.any();
}
@NodeIntrinsic
public static native int checkcastArraycopy(Object src, int srcPos, Object dest, int destPos, int length, Word superCheckOffset, Object destElemKlass, @ConstantNodeParameter boolean uninit);
}