Mercurial > hg > truffle
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/extended/LoadHubNode.java @ 7064:8d16b9b2c51e
first part of refactoring the InliningPhase
added control-flow sensitive inlining
inlining requires an Assumption object so that HotSpot can keep track of the inlined methods
author | Christian Haeubl <haeubl@ssw.jku.at> |
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date | Thu, 22 Nov 2012 13:30:14 +0100 |
parents | 6db6881c1270 |
children | 7d815d842ee0 |
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/* * Copyright (c) 2011, 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.nodes.extended; import com.oracle.graal.api.meta.ResolvedJavaType.Representation; import com.oracle.graal.api.meta.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.nodes.type.*; import com.oracle.graal.nodes.virtual.*; /** * Loads an object's {@linkplain Representation#ObjectHub hub}, null-checking the object first. */ public final class LoadHubNode extends FixedWithNextNode implements Lowerable, Canonicalizable, Virtualizable { @Input private ValueNode object; public ValueNode object() { return object; } public LoadHubNode(ValueNode object) { super(StampFactory.objectNonNull()); this.object = object; } @Override public void lower(LoweringTool tool) { tool.getRuntime().lower(this, tool); } @Override public ValueNode canonical(CanonicalizerTool tool) { MetaAccessProvider runtime = tool.runtime(); if (runtime != null) { ObjectStamp stamp = object.objectStamp(); ResolvedJavaType exactType; if (stamp.isExactType()) { exactType = stamp.type(); } else if (stamp.type() != null && tool.assumptions().useOptimisticAssumptions()) { exactType = stamp.type().findUniqueConcreteSubtype(); if (exactType != null) { tool.assumptions().recordConcreteSubtype(stamp.type(), exactType); } } else { exactType = null; } if (exactType != null) { return ConstantNode.forConstant(exactType.getEncoding(Representation.ObjectHub), runtime, graph()); } } return this; } @NodeIntrinsic public static native Object loadHub(Object object); @Override public void virtualize(VirtualizerTool tool) { VirtualObjectNode virtual = tool.getVirtualState(object()); if (virtual != null) { tool.replaceWithValue(ConstantNode.forConstant(virtual.type().getEncoding(Representation.ObjectHub), tool.getMetaAccessProvider(), graph())); } } }