Mercurial > hg > graal-jvmci-8
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/java/StoreIndexedNode.java @ 9499:e37aca5c2062
only virtualize StoreIndexedNode if no store check is required
author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Mon, 29 Apr 2013 10:12:37 +0200 |
parents | 0b646334c5f7 |
children | fcfedd3dd2eb |
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/* * Copyright (c) 2009, 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.java; import com.oracle.graal.api.meta.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.nodes.type.*; /** * The {@code StoreIndexedNode} represents a write to an array element. */ public final class StoreIndexedNode extends AccessIndexedNode implements StateSplit, Lowerable, Virtualizable { @Input private ValueNode value; @Input(notDataflow = true) private FrameState stateAfter; public FrameState stateAfter() { return stateAfter; } public void setStateAfter(FrameState x) { assert x == null || x.isAlive() : "frame state must be in a graph"; updateUsages(stateAfter, x); stateAfter = x; } public boolean hasSideEffect() { return true; } public ValueNode value() { return value; } /** * Creates a new StoreIndexedNode. * * @param array the node producing the array * @param index the node producing the index * @param elementKind the element type * @param value the value to store into the array */ public StoreIndexedNode(ValueNode array, ValueNode index, Kind elementKind, ValueNode value) { super(StampFactory.forVoid(), array, index, elementKind); this.value = value; } @Override public void virtualize(VirtualizerTool tool) { State arrayState = tool.getObjectState(array()); if (arrayState != null && arrayState.getState() == EscapeState.Virtual) { ValueNode indexValue = tool.getReplacedValue(index()); int index = indexValue.isConstant() ? indexValue.asConstant().asInt() : -1; if (index >= 0 && index < arrayState.getVirtualObject().entryCount()) { ResolvedJavaType componentType = arrayState.getVirtualObject().type().getComponentType(); if (componentType.isPrimitive() || value.objectStamp().alwaysNull() || componentType.isAssignableFrom(value.objectStamp().type())) { tool.setVirtualEntry(arrayState, index, value()); tool.delete(); } } } } }