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 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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.
 *
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package org.graalvm.compiler.hotspot.nodes.aot;

import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_UNKNOWN;
import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_20;

import org.graalvm.compiler.core.common.LocationIdentity;
import org.graalvm.compiler.graph.Node;
import org.graalvm.compiler.graph.NodeClass;
import org.graalvm.compiler.graph.spi.Canonicalizable;
import org.graalvm.compiler.graph.spi.CanonicalizerTool;
import org.graalvm.compiler.hotspot.HotSpotLIRGenerator;
import org.graalvm.compiler.hotspot.word.KlassPointer;
import org.graalvm.compiler.lir.LIRFrameState;
import org.graalvm.compiler.nodeinfo.InputType;
import org.graalvm.compiler.nodeinfo.NodeInfo;
import org.graalvm.compiler.nodes.DeoptimizingNode;
import org.graalvm.compiler.nodes.FrameState;
import org.graalvm.compiler.nodes.ValueNode;
import org.graalvm.compiler.nodes.memory.AbstractMemoryCheckpoint;
import org.graalvm.compiler.nodes.memory.MemoryCheckpoint;
import org.graalvm.compiler.nodes.spi.LIRLowerable;
import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;
import org.graalvm.compiler.nodes.util.GraphUtil;

import jdk.vm.ci.hotspot.HotSpotMetaspaceConstant;
import jdk.vm.ci.meta.Constant;
import jdk.vm.ci.meta.Value;

A call to the VM via a regular stub.
/** * A call to the VM via a regular stub. */
@NodeInfo(allowedUsageTypes = {InputType.Memory}, cycles = CYCLES_UNKNOWN, size = SIZE_20) public class InitializeKlassStubCall extends AbstractMemoryCheckpoint implements LIRLowerable, Canonicalizable, DeoptimizingNode.DeoptBefore, MemoryCheckpoint.Single { public static final NodeClass<InitializeKlassStubCall> TYPE = NodeClass.create(InitializeKlassStubCall.class); @OptionalInput protected ValueNode value; @Input protected ValueNode string; @OptionalInput(InputType.State) protected FrameState stateBefore; protected Constant constant; protected InitializeKlassStubCall(ValueNode value, ValueNode string) { super(TYPE, value.stamp()); this.value = value; this.string = string; } @NodeIntrinsic public static native KlassPointer initializeKlass(KlassPointer value, Object string); @Override public Node canonical(CanonicalizerTool tool) { if (value != null) { constant = GraphUtil.foldIfConstantAndRemove(this, value); } return this; } @Override public void generate(NodeLIRBuilderTool gen) { assert constant != null : "Expected the value to fold: " + value; Value stringValue = gen.operand(string); LIRFrameState fs = gen.state(this); assert fs != null : "Frame state should be set"; assert constant instanceof HotSpotMetaspaceConstant; Value result = ((HotSpotLIRGenerator) gen.getLIRGeneratorTool()).emitKlassInitializationAndRetrieval(constant, stringValue, fs); gen.setResult(this, result); } @Override public boolean canDeoptimize() { return true; } @Override public LocationIdentity getLocationIdentity() { return LocationIdentity.any(); } @Override public FrameState stateBefore() { return stateBefore; } @Override public void setStateBefore(FrameState f) { updateUsages(stateBefore, f); stateBefore = f; } }