| /* |
| * Copyright (c) 2015, 2015, 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.address; |
| |
| import org.graalvm.compiler.core.common.type.ObjectStamp; |
| 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.InputType; |
| import org.graalvm.compiler.nodeinfo.NodeInfo; |
| import org.graalvm.compiler.nodes.PiNode; |
| import org.graalvm.compiler.nodes.ValueNode; |
| import org.graalvm.compiler.nodes.calc.BinaryArithmeticNode; |
| import org.graalvm.compiler.nodes.spi.PiPushable; |
| import org.graalvm.compiler.nodes.type.StampTool; |
| |
| import jdk.vm.ci.meta.JavaKind; |
| import jdk.vm.ci.meta.ResolvedJavaField; |
| import jdk.vm.ci.meta.ResolvedJavaType; |
| |
| /** |
| * Represents an address that is composed of a base and an offset. The base can be either a |
| * {@link JavaKind#Object}, a word-sized integer or another pointer. The offset must be a word-sized |
| * integer. |
| */ |
| @NodeInfo(allowedUsageTypes = InputType.Association) |
| public class OffsetAddressNode extends AddressNode implements Canonicalizable, PiPushable { |
| public static final NodeClass<OffsetAddressNode> TYPE = NodeClass.create(OffsetAddressNode.class); |
| |
| @Input ValueNode base; |
| @Input ValueNode offset; |
| |
| public OffsetAddressNode(ValueNode base, ValueNode offset) { |
| super(TYPE); |
| this.base = base; |
| this.offset = offset; |
| } |
| |
| public ValueNode getBase() { |
| return base; |
| } |
| |
| public void setBase(ValueNode base) { |
| updateUsages(this.base, base); |
| this.base = base; |
| } |
| |
| public ValueNode getOffset() { |
| return offset; |
| } |
| |
| public void setOffset(ValueNode offset) { |
| updateUsages(this.offset, offset); |
| this.offset = offset; |
| } |
| |
| @Override |
| public Node canonical(CanonicalizerTool tool) { |
| if (base instanceof RawAddressNode) { |
| // The RawAddressNode is redundant, just directly use its input as base. |
| return new OffsetAddressNode(((RawAddressNode) base).getAddress(), offset); |
| } else if (base instanceof OffsetAddressNode) { |
| // Rewrite (&base[offset1])[offset2] to base[offset1 + offset2]. |
| OffsetAddressNode b = (OffsetAddressNode) base; |
| return new OffsetAddressNode(b.getBase(), BinaryArithmeticNode.add(b.getOffset(), this.getOffset())); |
| } else { |
| return this; |
| } |
| } |
| |
| @Override |
| public boolean push(PiNode parent) { |
| if (!(offset.isConstant() && parent.stamp() instanceof ObjectStamp && parent.object().stamp() instanceof ObjectStamp)) { |
| return false; |
| } |
| |
| ObjectStamp piStamp = (ObjectStamp) parent.stamp(); |
| ResolvedJavaType receiverType = piStamp.type(); |
| if (receiverType == null) { |
| return false; |
| } |
| ResolvedJavaField field = receiverType.findInstanceFieldWithOffset(offset.asJavaConstant().asLong(), JavaKind.Void); |
| if (field == null) { |
| // field was not declared by receiverType |
| return false; |
| } |
| |
| ObjectStamp valueStamp = (ObjectStamp) parent.object().stamp(); |
| ResolvedJavaType valueType = StampTool.typeOrNull(valueStamp); |
| if (valueType != null && field.getDeclaringClass().isAssignableFrom(valueType)) { |
| if (piStamp.nonNull() == valueStamp.nonNull() && piStamp.alwaysNull() == valueStamp.alwaysNull()) { |
| replaceFirstInput(parent, parent.object()); |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| @NodeIntrinsic |
| public static native Address address(Object base, long offset); |
| } |