Mercurial > hg > graal-compiler
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/extended/UnsafeStoreNode.java @ 23394:964f28c04d7b default tip
Don't fill the code cache with nmethods from CTW
author | Tom Rodriguez <tom.rodriguez@oracle.com> |
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date | Fri, 05 Feb 2016 22:48:36 -0800 |
parents | 615f3bbbb174 |
children |
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/* * Copyright (c) 2011, 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 jdk.vm.ci.meta.JavaConstant; import jdk.vm.ci.meta.JavaKind; import jdk.vm.ci.meta.LocationIdentity; import jdk.vm.ci.meta.ResolvedJavaField; import com.oracle.graal.compiler.common.type.StampFactory; import com.oracle.graal.graph.NodeClass; import com.oracle.graal.nodeinfo.InputType; import com.oracle.graal.nodeinfo.NodeInfo; import com.oracle.graal.nodes.ConstantNode; import com.oracle.graal.nodes.FrameState; import com.oracle.graal.nodes.StateSplit; import com.oracle.graal.nodes.ValueNode; import com.oracle.graal.nodes.java.StoreFieldNode; import com.oracle.graal.nodes.memory.MemoryCheckpoint; import com.oracle.graal.nodes.spi.Lowerable; import com.oracle.graal.nodes.spi.LoweringTool; import com.oracle.graal.nodes.spi.Virtualizable; import com.oracle.graal.nodes.spi.VirtualizerTool; import com.oracle.graal.nodes.virtual.VirtualObjectNode; /** * Store of a value at a location specified as an offset relative to an object. No null check is * performed before the store. */ @NodeInfo public final class UnsafeStoreNode extends UnsafeAccessNode implements StateSplit, Lowerable, Virtualizable, MemoryCheckpoint.Single { public static final NodeClass<UnsafeStoreNode> TYPE = NodeClass.create(UnsafeStoreNode.class); @Input ValueNode value; @OptionalInput(InputType.State) FrameState stateAfter; public UnsafeStoreNode(ValueNode object, ValueNode offset, ValueNode value, JavaKind accessKind, LocationIdentity locationIdentity) { this(object, offset, value, accessKind, locationIdentity, null); } public UnsafeStoreNode(ValueNode object, ValueNode offset, ValueNode value, JavaKind accessKind, LocationIdentity locationIdentity, FrameState stateAfter) { super(TYPE, StampFactory.forVoid(), object, offset, accessKind, locationIdentity); this.value = value; this.stateAfter = stateAfter; assert accessKind != JavaKind.Void && accessKind != JavaKind.Illegal; } 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; } @Override public void lower(LoweringTool tool) { tool.getLowerer().lower(this, tool); } @Override public void virtualize(VirtualizerTool tool) { ValueNode alias = tool.getAlias(object()); if (alias instanceof VirtualObjectNode) { VirtualObjectNode virtual = (VirtualObjectNode) alias; ValueNode indexValue = tool.getAlias(offset()); if (indexValue.isConstant()) { long off = indexValue.asJavaConstant().asLong(); int entryIndex = virtual.entryIndexForOffset(off, accessKind()); if (entryIndex != -1) { JavaKind entryKind = virtual.entryKind(entryIndex); ValueNode entry = tool.getEntry(virtual, entryIndex); if (entry.getStackKind() == value.getStackKind() || entryKind == accessKind()) { tool.setVirtualEntry(virtual, entryIndex, value(), true); tool.delete(); } else { if ((accessKind() == JavaKind.Long || accessKind() == JavaKind.Double) && entryKind == JavaKind.Int) { int nextIndex = virtual.entryIndexForOffset(off + 4, entryKind); if (nextIndex != -1) { JavaKind nextKind = virtual.entryKind(nextIndex); if (nextKind == JavaKind.Int) { tool.setVirtualEntry(virtual, entryIndex, value(), true); tool.setVirtualEntry(virtual, nextIndex, ConstantNode.forConstant(JavaConstant.forIllegal(), tool.getMetaAccessProvider(), graph()), true); tool.delete(); } } } } } } } } @Override protected ValueNode cloneAsFieldAccess(ResolvedJavaField field) { return new StoreFieldNode(object(), field, value(), stateAfter()); } @Override protected ValueNode cloneAsArrayAccess(ValueNode location, LocationIdentity identity) { return new UnsafeStoreNode(object(), location, value, accessKind(), identity, stateAfter()); } public FrameState getState() { return stateAfter; } }