Mercurial > hg > truffle
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/extended/WriteNode.java @ 11959:23ccaa863eda
made CodeCacheProvider independent of MetaAccessProvider (GRAAL-511)
author | Doug Simon <doug.simon@oracle.com> |
---|---|
date | Thu, 10 Oct 2013 16:14:55 +0200 |
parents | f8a87f3fab5a |
children | bca33c3135de |
line wrap: on
line source
/* * Copyright (c) 2011, 2012, 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.nodes.*; import com.oracle.graal.nodes.extended.LocationNode.Location; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.nodes.type.*; import com.oracle.graal.nodes.virtual.*; /** * Writes a given {@linkplain #value() value} a {@linkplain AccessNode memory location}. */ public final class WriteNode extends AccessNode implements StateSplit, LIRLowerable, MemoryCheckpoint.Single, Virtualizable { @Input private ValueNode value; @Input(notDataflow = true) private FrameState stateAfter; private final boolean initialization; 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; } /** * Returns whether this write is the initialization of the written location. If it is true, the * old value of the memory location is either uninitialized or zero. If it is false, the memory * location is guaranteed to contain a valid value or zero. */ public boolean isInitialization() { return initialization; } public WriteNode(ValueNode object, ValueNode value, ValueNode location, BarrierType barrierType, boolean compressible) { this(object, value, location, barrierType, compressible, false); } public WriteNode(ValueNode object, ValueNode value, ValueNode location, BarrierType barrierType, boolean compressible, boolean initialization) { super(object, location, StampFactory.forVoid(), barrierType, compressible); this.value = value; this.initialization = initialization; } @Override public void generate(LIRGeneratorTool gen) { Value address = location().generateAddress(gen, gen.operand(object())); gen.emitStore(location().getValueKind(), address, gen.operand(value()), this); } @NodeIntrinsic public static native void writeMemory(Object object, Object value, Location location, @ConstantNodeParameter BarrierType barrierType, @ConstantNodeParameter boolean compressible); @Override public LocationIdentity getLocationIdentity() { return location().getLocationIdentity(); } @Override public void virtualize(VirtualizerTool tool) { if (location() instanceof ConstantLocationNode) { ConstantLocationNode constantLocation = (ConstantLocationNode) location(); State state = tool.getObjectState(object()); if (state != null && state.getState() == EscapeState.Virtual) { VirtualObjectNode virtual = state.getVirtualObject(); int entryIndex = virtual.entryIndexForOffset(constantLocation.getDisplacement()); if (entryIndex != -1 && virtual.entryKind(entryIndex) == constantLocation.getValueKind()) { tool.setVirtualEntry(state, entryIndex, value()); tool.delete(); } } } } }