Mercurial > hg > truffle
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/extended/UnboxNode.java @ 20074:a7ee2e1f0d4e
remove UnboxNodes without usages (if object is non-null)
author | Lukas Stadler <lukas.stadler@oracle.com> |
---|---|
date | Mon, 30 Mar 2015 13:59:59 +0200 |
parents | 8aa5bd9935b3 |
children | a4aa2116cfe0 |
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/* * Copyright (c) 2013, 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.nodes.extended; 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.nodeinfo.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.nodes.type.*; @NodeInfo public final class UnboxNode extends FixedWithNextNode implements Virtualizable, Lowerable, Canonicalizable.Unary<ValueNode> { public static final NodeClass<UnboxNode> TYPE = NodeClass.create(UnboxNode.class); @Input protected ValueNode value; protected final Kind boxingKind; public ValueNode getValue() { return value; } protected UnboxNode(ValueNode value, Kind boxingKind) { super(TYPE, StampFactory.forKind(boxingKind.getStackKind())); this.value = value; this.boxingKind = boxingKind; } public static ValueNode create(MetaAccessProvider metaAccess, ConstantReflectionProvider constantReflection, ValueNode value, Kind boxingKind) { ValueNode synonym = findSynonym(metaAccess, constantReflection, value, boxingKind); if (synonym != null) { return synonym; } return new UnboxNode(value, boxingKind); } public Kind getBoxingKind() { return boxingKind; } @Override public void lower(LoweringTool tool) { tool.getLowerer().lower(this, tool); } @Override public void virtualize(VirtualizerTool tool) { State state = tool.getObjectState(getValue()); if (state != null && state.getState() == EscapeState.Virtual) { ResolvedJavaType objectType = state.getVirtualObject().type(); ResolvedJavaType expectedType = tool.getMetaAccessProvider().lookupJavaType(boxingKind.toBoxedJavaClass()); if (objectType.equals(expectedType)) { tool.replaceWithValue(state.getEntry(0)); } } } @Override public ValueNode canonical(CanonicalizerTool tool, ValueNode forValue) { if (hasNoUsages() && StampTool.isPointerNonNull(forValue)) { return null; } ValueNode synonym = findSynonym(tool.getMetaAccess(), tool.getConstantReflection(), forValue, boxingKind); if (synonym != null) { return synonym; } return this; } private static ValueNode findSynonym(MetaAccessProvider metaAccess, ConstantReflectionProvider constantReflection, ValueNode forValue, Kind boxingKind) { if (forValue.isConstant()) { JavaConstant constant = forValue.asJavaConstant(); JavaConstant unboxed = constantReflection.unboxPrimitive(constant); if (unboxed != null && unboxed.getKind() == boxingKind) { return ConstantNode.forConstant(unboxed, metaAccess); } } else if (forValue instanceof BoxNode) { BoxNode box = (BoxNode) forValue; if (boxingKind == box.getBoxingKind()) { return box.getValue(); } } return null; } }