Mercurial > hg > graal-compiler
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/ValueProxyNode.java @ 7394:94f032472c28
changed PEA interface:
* prepare for more fine-grained object states (thread local, ...)
* merge Virtualizable and EscapeAnalyzable interfaces
* make MaterializeObjectNode an ArrayLengthProvider
author | Lukas Stadler <lukas.stadler@jku.at> |
---|---|
date | Wed, 16 Jan 2013 15:15:32 +0100 |
parents | 6db6881c1270 |
children | 5e3d1a68664e |
line wrap: on
line source
/* * Copyright (c) 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; import com.oracle.graal.graph.*; import com.oracle.graal.graph.Node.ValueNumberable; import com.oracle.graal.nodes.PhiNode.PhiType; import com.oracle.graal.nodes.calc.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.nodes.type.*; /** * A value proxy that is inserted in the frame state of a loop exit for any value that is * created inside the loop (i.e. was not live on entry to the loop) and is (potentially) * used after the loop. */ public class ValueProxyNode extends FloatingNode implements Node.IterableNodeType, ValueNumberable, Canonicalizable, Virtualizable { @Input(notDataflow = true) private BeginNode proxyPoint; @Input private ValueNode value; private final PhiType type; public ValueProxyNode(ValueNode value, BeginNode exit, PhiType type) { super(value.stamp()); this.type = type; assert exit != null; this.proxyPoint = exit; this.value = value; } public ValueNode value() { return value; } @Override public boolean inferStamp() { return updateStamp(value.stamp()); } @Override public Stamp stamp() { return value().stamp(); } public BeginNode proxyPoint() { return proxyPoint; } public PhiType type() { return type; } @Override public boolean verify() { assert value != null; assert proxyPoint != null; return super.verify(); } @Override public ValueNode canonical(CanonicalizerTool tool) { if (value.isConstant()) { return value; } return this; } @Override public void virtualize(VirtualizerTool tool) { State state = tool.getObjectState(value); if (state != null && state.getState() == EscapeState.Virtual) { tool.replaceWithVirtual(state.getVirtualObject()); } } }