| /* |
| * 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 org.graalvm.compiler.core.common.LIRKind; |
| import org.graalvm.compiler.core.common.type.Stamp; |
| 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.nodeinfo.NodeInfo; |
| import org.graalvm.compiler.nodes.NodeView; |
| import org.graalvm.compiler.nodes.ValueNode; |
| import org.graalvm.compiler.nodes.memory.address.AddressNode; |
| import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool; |
| import jdk.internal.vm.compiler.word.LocationIdentity; |
| |
| /** |
| * Writes a given {@linkplain #value() value} a {@linkplain FixedAccessNode memory location}. |
| */ |
| @NodeInfo(nameTemplate = "Write#{p#location/s}") |
| public class WriteNode extends AbstractWriteNode implements LIRLowerableAccess, Canonicalizable { |
| |
| public static final NodeClass<WriteNode> TYPE = NodeClass.create(WriteNode.class); |
| |
| public WriteNode(AddressNode address, LocationIdentity location, ValueNode value, BarrierType barrierType) { |
| super(TYPE, address, location, value, barrierType); |
| } |
| |
| protected WriteNode(NodeClass<? extends WriteNode> c, AddressNode address, LocationIdentity location, ValueNode value, BarrierType barrierType) { |
| super(c, address, location, value, barrierType); |
| } |
| |
| @Override |
| public void generate(NodeLIRBuilderTool gen) { |
| LIRKind writeKind = gen.getLIRGeneratorTool().getLIRKind(value().stamp(NodeView.DEFAULT)); |
| gen.getLIRGeneratorTool().getArithmetic().emitStore(writeKind, gen.operand(address), gen.operand(value()), gen.state(this)); |
| } |
| |
| @Override |
| public boolean canNullCheck() { |
| return true; |
| } |
| |
| @Override |
| public Stamp getAccessStamp() { |
| return value().stamp(NodeView.DEFAULT); |
| } |
| |
| @Override |
| public Node canonical(CanonicalizerTool tool) { |
| if (tool.canonicalizeReads() && hasExactlyOneUsage() && next() instanceof WriteNode) { |
| WriteNode write = (WriteNode) next(); |
| if (write.lastLocationAccess == this && write.getAddress() == getAddress() && getAccessStamp().isCompatible(write.getAccessStamp())) { |
| write.setLastLocationAccess(getLastLocationAccess()); |
| return write; |
| } |
| } |
| return this; |
| } |
| } |