Mercurial > hg > truffle
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/BeginNode.java @ 19914:d27ca0a54e36
LIRPhaseSuite: add copy().
author | Josef Eisl <josef.eisl@jku.at> |
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date | Mon, 16 Mar 2015 16:37:21 +0100 |
parents | 4df907480030 |
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; import com.oracle.graal.compiler.common.type.*; import com.oracle.graal.graph.*; import com.oracle.graal.nodeinfo.*; @NodeInfo public final class BeginNode extends AbstractBeginNode { public static final NodeClass<BeginNode> TYPE = NodeClass.create(BeginNode.class); public BeginNode() { super(TYPE, StampFactory.forVoid()); } public BeginNode(Stamp stamp) { super(TYPE, stamp); } public void trySimplify() { FixedNode prev = (FixedNode) this.predecessor(); if (prev instanceof ControlSplitNode) { // This begin node is necessary. } else { // This begin node can be removed and all guards moved up to the preceding begin node. prepareDelete(); graph().removeFixed(this); } } public static AbstractBeginNode begin(FixedNode with) { if (with instanceof AbstractBeginNode) { return (AbstractBeginNode) with; } BeginNode begin = with.graph().add(new BeginNode()); begin.setNext(with); return begin; } }