Mercurial > hg > truffle
view graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/replacements/KlassLayoutHelperNode.java @ 19526:8fc336a04d77
Create TYPE fields for LIRInstruction and CompositeValue. Renaming NodeClass#get to NodeClass#create.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Fri, 20 Feb 2015 22:22:55 +0100 |
parents | 61d3cb8e1280 |
children | a4aa2116cfe0 |
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/* * Copyright (c) 2014, 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 com.oracle.graal.hotspot.replacements; import com.oracle.graal.api.meta.*; import com.oracle.graal.compiler.common.type.*; import com.oracle.graal.graph.*; import com.oracle.graal.graph.spi.*; import com.oracle.graal.hotspot.*; import com.oracle.graal.hotspot.meta.*; import com.oracle.graal.nodeinfo.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.extended.*; import com.oracle.graal.nodes.spi.*; /** * Read {@code Klass::_layout_helper} and incorporate any useful stamp information based on any type * information in {@code klass}. */ @NodeInfo public final class KlassLayoutHelperNode extends FloatingGuardedNode implements Canonicalizable, Lowerable { public static final NodeClass<KlassLayoutHelperNode> TYPE = NodeClass.create(KlassLayoutHelperNode.class); @Input protected ValueNode klass; protected final HotSpotVMConfig config; public KlassLayoutHelperNode(@InjectedNodeParameter HotSpotVMConfig config, ValueNode klass) { this(config, klass, null); } public KlassLayoutHelperNode(@InjectedNodeParameter HotSpotVMConfig config, ValueNode klass, ValueNode guard) { super(TYPE, StampFactory.forKind(Kind.Int), (GuardingNode) guard); this.klass = klass; this.config = config; } @Override public boolean inferStamp() { if (klass instanceof LoadHubNode) { LoadHubNode hub = (LoadHubNode) klass; Stamp hubStamp = hub.getValue().stamp(); if (hubStamp instanceof ObjectStamp) { ObjectStamp objectStamp = (ObjectStamp) hubStamp; ResolvedJavaType type = objectStamp.type(); if (type != null && !type.isJavaLangObject()) { if (!type.isArray() && !type.isInterface()) { /* * Definitely some form of instance type. */ return updateStamp(StampFactory.forInteger(Kind.Int, config.klassLayoutHelperNeutralValue, Integer.MAX_VALUE)); } if (type.isArray()) { return updateStamp(StampFactory.forInteger(Kind.Int, Integer.MIN_VALUE, config.klassLayoutHelperNeutralValue - 1)); } } } } return false; } @Override public Node canonical(CanonicalizerTool tool) { if (hasNoUsages()) { return null; } else { if (klass.isConstant()) { if (!klass.asConstant().isDefaultForKind()) { Constant constant = stamp().readConstant(tool.getConstantReflection().getMemoryAccessProvider(), klass.asJavaConstant(), config.klassLayoutHelperOffset); return ConstantNode.forConstant(stamp(), constant, tool.getMetaAccess()); } } if (klass instanceof LoadHubNode) { LoadHubNode hub = (LoadHubNode) klass; Stamp hubStamp = hub.getValue().stamp(); if (hubStamp instanceof ObjectStamp) { ObjectStamp ostamp = (ObjectStamp) hubStamp; HotSpotResolvedObjectType type = (HotSpotResolvedObjectType) ostamp.type(); if (type != null && type.isArray() && !type.getComponentType().isPrimitive()) { // The layout for all object arrays is the same. Constant constant = stamp().readConstant(tool.getConstantReflection().getMemoryAccessProvider(), type.klass(), config.klassLayoutHelperOffset); return ConstantNode.forConstant(stamp(), constant, tool.getMetaAccess()); } } } return this; } } @Override public void lower(LoweringTool tool) { tool.getLowerer().lower(this, tool); } public ValueNode getHub() { return klass; } }