--- /dev/null 2016-05-31 09:42:47.975716356 -0700 +++ new/src/jdk.vm.compiler/share/classes/org.graalvm.compiler.nodes/src/org/graalvm/compiler/nodes/memory/address/OffsetAddressNode.java 2016-12-09 00:55:57.622429563 -0800 @@ -0,0 +1,123 @@ +/* + * 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 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); +}