| /* |
| * 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.extended; |
| |
| import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_2; |
| import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_1; |
| |
| import org.graalvm.compiler.core.common.type.PrimitiveStamp; |
| import org.graalvm.compiler.core.common.type.Stamp; |
| import org.graalvm.compiler.core.common.type.StampFactory; |
| 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.ConstantNode; |
| import org.graalvm.compiler.nodes.NodeView; |
| import org.graalvm.compiler.nodes.ValueNode; |
| import org.graalvm.compiler.nodes.calc.ReinterpretNode; |
| import org.graalvm.compiler.nodes.java.LoadFieldNode; |
| import org.graalvm.compiler.nodes.spi.Lowerable; |
| import org.graalvm.compiler.nodes.spi.LoweringTool; |
| import org.graalvm.compiler.nodes.spi.Virtualizable; |
| import org.graalvm.compiler.nodes.spi.VirtualizerTool; |
| import org.graalvm.compiler.nodes.type.StampTool; |
| import org.graalvm.compiler.nodes.virtual.VirtualObjectNode; |
| import jdk.internal.vm.compiler.word.LocationIdentity; |
| |
| import jdk.vm.ci.meta.Assumptions; |
| import jdk.vm.ci.meta.Constant; |
| import jdk.vm.ci.meta.JavaConstant; |
| import jdk.vm.ci.meta.JavaKind; |
| import jdk.vm.ci.meta.ResolvedJavaField; |
| import jdk.vm.ci.meta.ResolvedJavaType; |
| |
| /** |
| * Load of a value from a location specified as an offset relative to an object. No null check is |
| * performed before the load. |
| */ |
| @NodeInfo(cycles = CYCLES_2, size = SIZE_1) |
| public class RawLoadNode extends UnsafeAccessNode implements Lowerable, Virtualizable, Canonicalizable { |
| public static final NodeClass<RawLoadNode> TYPE = NodeClass.create(RawLoadNode.class); |
| |
| /** |
| * This constructor exists for node intrinsics that need a stamp based on {@code accessKind}. |
| */ |
| public RawLoadNode(ValueNode object, ValueNode offset, JavaKind accessKind, LocationIdentity locationIdentity) { |
| this(object, offset, accessKind, locationIdentity, false); |
| } |
| |
| public RawLoadNode(ValueNode object, ValueNode offset, JavaKind accessKind, LocationIdentity locationIdentity, boolean forceAnyLocation) { |
| super(TYPE, StampFactory.forKind(accessKind.getStackKind()), object, offset, accessKind, locationIdentity, forceAnyLocation); |
| } |
| |
| /** |
| * This constructor exists for node intrinsics that need a stamp based on the return type of the |
| * {@link org.graalvm.compiler.graph.Node.NodeIntrinsic} annotated method. |
| */ |
| public RawLoadNode(@InjectedNodeParameter Stamp stamp, ValueNode object, ValueNode offset, LocationIdentity locationIdentity, JavaKind accessKind) { |
| super(TYPE, stamp, object, offset, accessKind, locationIdentity, false); |
| } |
| |
| protected RawLoadNode(NodeClass<? extends RawLoadNode> c, ValueNode object, ValueNode offset, JavaKind accessKind, LocationIdentity locationIdentity) { |
| super(c, StampFactory.forKind(accessKind.getStackKind()), object, offset, accessKind, locationIdentity, false); |
| } |
| |
| @Override |
| public void lower(LoweringTool tool) { |
| tool.getLowerer().lower(this, tool); |
| } |
| |
| @Override |
| public void virtualize(VirtualizerTool tool) { |
| ValueNode alias = tool.getAlias(object()); |
| if (alias instanceof VirtualObjectNode) { |
| VirtualObjectNode virtual = (VirtualObjectNode) alias; |
| ValueNode offsetValue = tool.getAlias(offset()); |
| if (offsetValue.isConstant()) { |
| long off = offsetValue.asJavaConstant().asLong(); |
| int entryIndex = virtual.entryIndexForOffset(tool.getArrayOffsetProvider(), off, accessKind()); |
| |
| if (entryIndex != -1) { |
| ValueNode entry = tool.getEntry(virtual, entryIndex); |
| JavaKind entryKind = virtual.entryKind(entryIndex); |
| if (entry.getStackKind() == getStackKind() || entryKind == accessKind()) { |
| |
| if (!(entry.stamp(NodeView.DEFAULT).isCompatible(stamp(NodeView.DEFAULT)))) { |
| if (entry.stamp(NodeView.DEFAULT) instanceof PrimitiveStamp && stamp instanceof PrimitiveStamp) { |
| PrimitiveStamp p1 = (PrimitiveStamp) stamp; |
| PrimitiveStamp p2 = (PrimitiveStamp) entry.stamp(NodeView.DEFAULT); |
| int width1 = p1.getBits(); |
| int width2 = p2.getBits(); |
| if (width1 == width2) { |
| Node replacement = ReinterpretNode.create(p2, entry, NodeView.DEFAULT); |
| tool.replaceWith((ValueNode) replacement); |
| return; |
| } else { |
| // different bit width |
| return; |
| } |
| } else { |
| // cannot reinterpret for arbitrary objects |
| return; |
| } |
| } |
| tool.replaceWith(entry); |
| } |
| } |
| } |
| } |
| } |
| |
| @Override |
| public Node canonical(CanonicalizerTool tool) { |
| if (!isAnyLocationForced() && getLocationIdentity().isAny()) { |
| ValueNode targetObject = object(); |
| if (offset().isConstant() && targetObject.isConstant() && !targetObject.isNullConstant()) { |
| ConstantNode objectConstant = (ConstantNode) targetObject; |
| ResolvedJavaType type = StampTool.typeOrNull(objectConstant); |
| if (type != null && type.isArray()) { |
| JavaConstant arrayConstant = objectConstant.asJavaConstant(); |
| if (arrayConstant != null) { |
| int stableDimension = objectConstant.getStableDimension(); |
| if (stableDimension > 0) { |
| NodeView view = NodeView.from(tool); |
| long constantOffset = offset().asJavaConstant().asLong(); |
| Constant constant = stamp(view).readConstant(tool.getConstantReflection().getMemoryAccessProvider(), arrayConstant, constantOffset); |
| boolean isDefaultStable = objectConstant.isDefaultStable(); |
| if (constant != null && (isDefaultStable || !constant.isDefaultForKind())) { |
| return ConstantNode.forConstant(stamp(view), constant, stableDimension - 1, isDefaultStable, tool.getMetaAccess()); |
| } |
| } |
| } |
| } |
| } |
| } |
| return super.canonical(tool); |
| } |
| |
| @Override |
| protected ValueNode cloneAsFieldAccess(Assumptions assumptions, ResolvedJavaField field, boolean volatileAccess) { |
| return LoadFieldNode.create(assumptions, object(), field, volatileAccess); |
| } |
| |
| @Override |
| protected ValueNode cloneAsArrayAccess(ValueNode location, LocationIdentity identity) { |
| return new RawLoadNode(object(), location, accessKind(), identity); |
| } |
| |
| @NodeIntrinsic |
| public static native Object load(Object object, long offset, @ConstantNodeParameter JavaKind kind, @ConstantNodeParameter LocationIdentity locationIdentity); |
| } |
