Mercurial > hg > truffle
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/extended/FloatableAccessNode.java @ 18993:480bd3b1adcd
Rename BeginNode => AbstractBeginNode.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Wed, 28 Jan 2015 00:50:31 +0100 |
parents | 12bd2b344b08 |
children | 7e2c87dae93e |
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/* * Copyright (c) 2013, 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.nodeinfo.*; import com.oracle.graal.nodes.*; /** * An {@link FixedAccessNode} that can be converted to a {@link FloatingAccessNode}. */ @NodeInfo public abstract class FloatableAccessNode extends FixedAccessNode { public FloatableAccessNode(ValueNode object, ValueNode location, Stamp stamp) { super(object, location, stamp); } public FloatableAccessNode(ValueNode object, ValueNode location, Stamp stamp, GuardingNode guard, BarrierType barrierType) { super(object, location, stamp, guard, barrierType, false, null); } public FloatableAccessNode(ValueNode object, ValueNode location, Stamp stamp, GuardingNode guard, BarrierType barrierType, boolean nullCheck, FrameState stateBefore) { super(object, location, stamp, guard, barrierType, nullCheck, stateBefore); } public abstract FloatingAccessNode asFloatingNode(MemoryNode lastLocationAccess); /** * AccessNodes can float only if their location identities are not ANY_LOCATION. Furthermore, in * case G1 is enabled any access (read) to the java.lang.ref.Reference.referent field which has * an attached write barrier with pre-semantics can not also float. */ public boolean canFloat() { return !location().getLocationIdentity().equals(LocationIdentity.ANY_LOCATION) && getBarrierType() == BarrierType.NONE; } }