1 /* 2 * Copyright (c) 2011, 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package org.graalvm.compiler.nodes.memory; 24 25 import static org.graalvm.compiler.nodeinfo.InputType.Guard; 26 27 import org.graalvm.compiler.core.common.LIRKind; 28 import org.graalvm.compiler.core.common.LocationIdentity; 29 import org.graalvm.compiler.debug.GraalError; 30 import org.graalvm.compiler.graph.Node; 31 import org.graalvm.compiler.graph.NodeClass; 32 import org.graalvm.compiler.graph.spi.Simplifiable; 33 import org.graalvm.compiler.graph.spi.SimplifierTool; 34 import org.graalvm.compiler.nodeinfo.NodeInfo; 35 import org.graalvm.compiler.nodes.PiNode; 36 import org.graalvm.compiler.nodes.ValueNode; 37 import org.graalvm.compiler.nodes.extended.GuardingNode; 38 import org.graalvm.compiler.nodes.memory.address.AddressNode; 39 import org.graalvm.compiler.nodes.memory.address.AddressNode.Address; 40 import org.graalvm.compiler.nodes.memory.address.OffsetAddressNode; 41 import org.graalvm.compiler.nodes.spi.LIRLowerable; 42 import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool; 43 import org.graalvm.compiler.nodes.spi.Virtualizable; 44 import org.graalvm.compiler.nodes.spi.VirtualizerTool; 45 46 /** 47 * Writes a given {@linkplain #value() value} a {@linkplain FixedAccessNode memory location}. 48 */ 49 @NodeInfo(nameTemplate = "Write#{p#location/s}") 50 public class WriteNode extends AbstractWriteNode implements LIRLowerable, Simplifiable, Virtualizable { 51 52 public static final NodeClass<WriteNode> TYPE = NodeClass.create(WriteNode.class); 53 54 @OptionalInput(Guard) protected GuardingNode storeCheckGuard; 55 56 protected WriteNode(ValueNode address, LocationIdentity location, ValueNode value, BarrierType barrierType) { 57 this((AddressNode) address, location, value, barrierType); 58 } 59 60 public WriteNode(AddressNode address, LocationIdentity location, ValueNode value, BarrierType barrierType) { 61 super(TYPE, address, location, value, barrierType); 62 } 63 64 public WriteNode(AddressNode address, LocationIdentity location, ValueNode value, BarrierType barrierType, boolean initialization) { 65 super(TYPE, address, location, value, barrierType, initialization); 66 } 67 68 public WriteNode(AddressNode address, LocationIdentity location, ValueNode value, BarrierType barrierType, GuardingNode guard, boolean initialization) { 69 this(TYPE, address, location, value, barrierType, guard, initialization); 70 } 71 72 protected WriteNode(NodeClass<? extends WriteNode> c, AddressNode address, LocationIdentity location, ValueNode value, BarrierType barrierType, GuardingNode guard, boolean initialization) { 73 super(c, address, location, value, barrierType, guard, initialization); 74 } 75 76 @Override 77 public void generate(NodeLIRBuilderTool gen) { 78 LIRKind writeKind = gen.getLIRGeneratorTool().getLIRKind(value().stamp()); 79 gen.getLIRGeneratorTool().getArithmetic().emitStore(writeKind, gen.operand(address), gen.operand(value()), gen.state(this)); 80 } 81 82 @Override 83 public void simplify(SimplifierTool tool) { 84 if (getAddress() instanceof OffsetAddressNode) { 85 OffsetAddressNode objAddress = (OffsetAddressNode) getAddress(); 86 if (objAddress.getBase() instanceof PiNode && ((PiNode) objAddress.getBase()).getGuard() == getGuard()) { 87 OffsetAddressNode newAddress = graph().unique(new OffsetAddressNode(((PiNode) objAddress.getBase()).getOriginalNode(), objAddress.getOffset())); 88 setAddress(newAddress); 89 tool.addToWorkList(newAddress); 90 } 91 } 92 } 93 94 @NodeIntrinsic 95 public static native void writeMemory(Address address, @ConstantNodeParameter LocationIdentity location, Object value, @ConstantNodeParameter BarrierType barrierType); 96 97 @Override 98 public void virtualize(VirtualizerTool tool) { 99 throw GraalError.shouldNotReachHere("unexpected WriteNode before PEA"); 100 } 101 102 @Override 103 public boolean canNullCheck() { 104 return true; 105 } 106 107 public void setStoreCheckGuard(GuardingNode newStoreCheckGuard) { 108 updateUsages((Node) this.storeCheckGuard, (Node) newStoreCheckGuard); 109 this.storeCheckGuard = newStoreCheckGuard; 110 } 111 }