| /* |
| * Copyright (c) 2011, 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. |
| */ |
| package org.graalvm.compiler.nodes.memory; |
| |
| import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_3; |
| import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_1; |
| |
| import org.graalvm.compiler.core.common.LocationIdentity; |
| import org.graalvm.compiler.core.common.type.StampFactory; |
| import org.graalvm.compiler.graph.Node; |
| import org.graalvm.compiler.graph.NodeClass; |
| import org.graalvm.compiler.nodeinfo.InputType; |
| 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.ValueNodeUtil; |
| import org.graalvm.compiler.nodes.extended.GuardingNode; |
| import org.graalvm.compiler.nodes.memory.address.AddressNode; |
| |
| @NodeInfo(allowedUsageTypes = {InputType.Memory, InputType.Guard}, cycles = CYCLES_3, size = SIZE_1) |
| public abstract class AbstractWriteNode extends FixedAccessNode implements StateSplit, MemoryCheckpoint.Single, MemoryAccess, GuardingNode { |
| |
| public static final NodeClass<AbstractWriteNode> TYPE = NodeClass.create(AbstractWriteNode.class); |
| @Input ValueNode value; |
| @OptionalInput(InputType.State) FrameState stateAfter; |
| @OptionalInput(InputType.Memory) Node lastLocationAccess; |
| |
| protected final boolean initialization; |
| |
| @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; |
| } |
| |
| /** |
| * Returns whether this write is the initialization of the written location. If it is true, the |
| * old value of the memory location is either uninitialized or zero. If it is false, the memory |
| * location is guaranteed to contain a valid value or zero. |
| */ |
| public boolean isInitialization() { |
| return initialization; |
| } |
| |
| protected AbstractWriteNode(NodeClass<? extends AbstractWriteNode> c, AddressNode address, LocationIdentity location, ValueNode value, BarrierType barrierType) { |
| this(c, address, location, value, barrierType, false); |
| } |
| |
| protected AbstractWriteNode(NodeClass<? extends AbstractWriteNode> c, AddressNode address, LocationIdentity location, ValueNode value, BarrierType barrierType, boolean initialization) { |
| super(c, address, location, StampFactory.forVoid(), barrierType); |
| this.value = value; |
| this.initialization = initialization; |
| } |
| |
| protected AbstractWriteNode(NodeClass<? extends AbstractWriteNode> c, AddressNode address, LocationIdentity location, ValueNode value, BarrierType barrierType, GuardingNode guard, |
| boolean initialization) { |
| super(c, address, location, StampFactory.forVoid(), guard, barrierType, false, null); |
| this.value = value; |
| this.initialization = initialization; |
| } |
| |
| @Override |
| public boolean isAllowedUsageType(InputType type) { |
| return (type == InputType.Guard && getNullCheck()) ? true : super.isAllowedUsageType(type); |
| } |
| |
| @Override |
| public MemoryNode getLastLocationAccess() { |
| return (MemoryNode) lastLocationAccess; |
| } |
| |
| @Override |
| public void setLastLocationAccess(MemoryNode lla) { |
| Node newLla = ValueNodeUtil.asNode(lla); |
| updateUsages(lastLocationAccess, newLla); |
| lastLocationAccess = newLla; |
| } |
| } |