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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.nodes.java;

import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_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.NodeCycles;
import org.graalvm.compiler.nodeinfo.NodeInfo;
import org.graalvm.compiler.nodes.FrameState;
import org.graalvm.compiler.nodes.StateSplit;
import org.graalvm.compiler.nodes.ValueNode;
import org.graalvm.compiler.nodes.spi.Virtualizable;
import org.graalvm.compiler.nodes.spi.VirtualizerTool;
import org.graalvm.compiler.nodes.virtual.VirtualInstanceNode;
import org.graalvm.compiler.nodes.virtual.VirtualObjectNode;

import jdk.vm.ci.meta.ResolvedJavaField;

The StoreFieldNode represents a write to a static or instance field.
/** * The {@code StoreFieldNode} represents a write to a static or instance field. */
@NodeInfo(nameTemplate = "StoreField#{p#field/s}") public final class StoreFieldNode extends AccessFieldNode implements StateSplit, Virtualizable { public static final NodeClass<StoreFieldNode> TYPE = NodeClass.create(StoreFieldNode.class); @Input ValueNode value; @OptionalInput(InputType.State) FrameState stateAfter; @Override public FrameState stateAfter() { return stateAfter; } @Override public void setStateAfter(FrameState x) { assert x == null || x.isAlive() : "frame state must be in a graph"; updateUsages(stateAfter, x); stateAfter = x; } @Override public boolean hasSideEffect() { return true; } public ValueNode value() { return value; } public StoreFieldNode(ValueNode object, ResolvedJavaField field, ValueNode value) { this(object, field, value, field.isVolatile()); } public StoreFieldNode(ValueNode object, ResolvedJavaField field, ValueNode value, boolean volatileAccess) { super(TYPE, StampFactory.forVoid(), object, field, volatileAccess); this.value = value; } public StoreFieldNode(ValueNode object, ResolvedJavaField field, ValueNode value, FrameState stateAfter, boolean volatileAccess) { super(TYPE, StampFactory.forVoid(), object, field, volatileAccess); this.value = value; this.stateAfter = stateAfter; } @Override public void virtualize(VirtualizerTool tool) { ValueNode alias = tool.getAlias(object()); if (alias instanceof VirtualObjectNode) { VirtualInstanceNode virtual = (VirtualInstanceNode) alias; int fieldIndex = virtual.fieldIndex(field()); if (fieldIndex != -1) { tool.setVirtualEntry(virtual, fieldIndex, value()); tool.delete(); } } } public FrameState getState() { return stateAfter; } @Override public NodeCycles estimatedNodeCycles() { if (isVolatile()) { return CYCLES_8; } return super.estimatedNodeCycles(); } }