Mercurial > hg > graal-jvmci-8
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/extended/FloatableAccessNode.java @ 13153:ae0001b445c0
Common base interface for nodes in the memory graph.
author | Roland Schatz <roland.schatz@oracle.com> |
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date | Mon, 25 Nov 2013 17:10:22 +0100 |
parents | b05e1ff3aac0 |
children | 1734954cc73d |
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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.nodes.*; import com.oracle.graal.nodes.type.*; /** * An {@link AccessNode} that can be converted to a {@link FloatingAccessNode}. */ public abstract class FloatableAccessNode extends AccessNode { public FloatableAccessNode(ValueNode object, ValueNode location, Stamp stamp) { super(object, location, stamp); } public FloatableAccessNode(ValueNode object, ValueNode location, Stamp stamp, GuardingNode guard, BarrierType barrierType, boolean compressible) { super(object, location, stamp, guard, barrierType, compressible); } public FloatableAccessNode(ValueNode object, ValueNode location, Stamp stamp, BarrierType barrierType, boolean compressible) { super(object, location, stamp, barrierType, compressible); } 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() != LocationIdentity.ANY_LOCATION && getBarrierType() == BarrierType.NONE; } }