Mercurial > hg > truffle
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/extended/SafeReadNode.java @ 8481:92571f3eeeeb
made VM independent method substitutions be interpretable
author | Doug Simon <doug.simon@oracle.com> |
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date | Tue, 26 Mar 2013 14:00:16 +0100 |
parents | 0b646334c5f7 |
children |
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/* * 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. * * 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.nodes.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.nodes.type.*; /** * An analog to {@link ReadNode} with the additional semantics of null-checking the receiver object * before reading from it. */ public class SafeReadNode extends SafeAccessNode implements Lowerable { public SafeReadNode(ValueNode object, LocationNode location, Stamp stamp) { super(object, location, stamp); assert object != null && location != null; } @Override public void lower(LoweringTool tool) { StructuredGraph graph = (StructuredGraph) graph(); ValueNode guard = tool.createNullCheckGuard(object()); ReadNode read = graph.add(new ReadNode(object(), location(), stamp())); read.dependencies().add(guard); graph.replaceFixedWithFixed(this, read); } }