/*
* Copyright (c) 2011, 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.
*
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package com.oracle.max.graal.nodes.extended;
import com.oracle.max.graal.cri.*;
import com.oracle.max.graal.graph.*;
import com.oracle.max.graal.nodes.*;
import com.oracle.max.graal.nodes.calc.*;
import com.oracle.max.graal.nodes.spi.*;
import com.sun.cri.ci.*;
public class SafeReadNode extends SafeAccessNode implements Lowerable {
public SafeReadNode(CiKind kind, ValueNode object, LocationNode location) {
super(kind, object, location);
assert object != null && location != null;
}
@Override
public void lower(CiLoweringTool tool) {
Graph graph = graph();
GuardNode guard = (GuardNode) tool.createGuard(graph.unique(new NullCheckNode(object(), false)));
ReadNode read = graph.unique(new ReadNode(kind(), object(), location()));
read.setGuard(guard);
FixedNode next = this.next();
this.setNext(null);
read.setNext(next);
this.replaceAndDelete(read);
}
}