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/*
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* Copyright (c) 2011, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package org.graalvm.compiler.nodes.memory;
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import org.graalvm.compiler.core.common.type.Stamp;
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import org.graalvm.compiler.graph.IterableNodeType;
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import org.graalvm.compiler.graph.NodeClass;
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import org.graalvm.compiler.nodeinfo.InputType;
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import org.graalvm.compiler.nodeinfo.NodeInfo;
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import org.graalvm.compiler.nodes.DeoptimizingFixedWithNextNode;
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import org.graalvm.compiler.nodes.FrameState;
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import org.graalvm.compiler.nodes.extended.GuardingNode;
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import org.graalvm.compiler.nodes.memory.address.AddressNode;
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import jdk.internal.vm.compiler.word.LocationIdentity;
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/**
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* Accesses a value at an memory address specified by an {@linkplain #address address}. The access
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* does not include a null check on the object.
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*/
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@NodeInfo
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public abstract class FixedAccessNode extends DeoptimizingFixedWithNextNode implements Access, IterableNodeType {
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public static final NodeClass<FixedAccessNode> TYPE = NodeClass.create(FixedAccessNode.class);
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@OptionalInput(InputType.Guard) protected GuardingNode guard;
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@Input(InputType.Association) AddressNode address;
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protected final LocationIdentity location;
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protected boolean nullCheck;
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protected BarrierType barrierType;
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@Override
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public AddressNode getAddress() {
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return address;
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}
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@Override
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public void setAddress(AddressNode address) {
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updateUsages(this.address, address);
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this.address = address;
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}
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@Override
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public LocationIdentity getLocationIdentity() {
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return location;
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}
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public boolean getNullCheck() {
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return nullCheck;
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}
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public void setNullCheck(boolean check) {
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this.nullCheck = check;
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}
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protected FixedAccessNode(NodeClass<? extends FixedAccessNode> c, AddressNode address, LocationIdentity location, Stamp stamp) {
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this(c, address, location, stamp, BarrierType.NONE);
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}
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protected FixedAccessNode(NodeClass<? extends FixedAccessNode> c, AddressNode address, LocationIdentity location, Stamp stamp, BarrierType barrierType) {
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this(c, address, location, stamp, null, barrierType, false, null);
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}
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protected FixedAccessNode(NodeClass<? extends FixedAccessNode> c, AddressNode address, LocationIdentity location, Stamp stamp, GuardingNode guard, BarrierType barrierType, boolean nullCheck,
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FrameState stateBefore) {
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super(c, stamp, stateBefore);
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this.address = address;
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this.location = location;
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this.guard = guard;
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this.barrierType = barrierType;
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this.nullCheck = nullCheck;
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}
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@Override
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public boolean canDeoptimize() {
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return nullCheck;
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}
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@Override
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public GuardingNode getGuard() {
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return guard;
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}
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@Override
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public void setGuard(GuardingNode guard) {
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updateUsagesInterface(this.guard, guard);
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this.guard = guard;
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}
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@Override
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public BarrierType getBarrierType() {
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return barrierType;
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}
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}
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