Mercurial > hg > graal-compiler
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/LoopEndNode.java @ 16919:0fe4732e5181
made use of generated Node classes predicated on value of graal.useGeneratedNodes system property (default is false)
author | Doug Simon <doug.simon@oracle.com> |
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date | Mon, 25 Aug 2014 13:45:12 +0200 |
parents | f90dcdbbb75e |
children | ffb974bef674 |
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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 java.util.*; import com.oracle.graal.graph.*; import com.oracle.graal.nodeinfo.*; import com.oracle.graal.nodes.spi.*; @NodeInfo public class LoopEndNode extends AbstractEndNode { @Input(InputType.Association) LoopBeginNode loopBegin; private boolean canSafepoint; private int endIndex; public static LoopEndNode create(LoopBeginNode begin) { return USE_GENERATED_NODES ? new LoopEndNodeGen(begin) : new LoopEndNode(begin); } protected LoopEndNode(LoopBeginNode begin) { int idx = begin.nextEndIndex(); assert idx >= 0; this.endIndex = idx; this.loopBegin = begin; this.canSafepoint = true; } @Override public MergeNode merge() { return loopBegin(); } public LoopBeginNode loopBegin() { return loopBegin; } public void setLoopBegin(LoopBeginNode x) { updateUsages(this.loopBegin, x); this.loopBegin = x; } public void disableSafepoint() { this.canSafepoint = false; } public boolean canSafepoint() { return canSafepoint; } @Override public void generate(NodeLIRBuilderTool gen) { gen.visitLoopEnd(this); super.generate(gen); } @Override public boolean verify() { assertTrue(loopBegin != null, "must have a loop begin"); assertTrue(usages().isEmpty(), "LoopEnds can not be used"); return super.verify(); } /** * Returns the 0-based index of this loop end. This is <b>not</b> the index into {@link PhiNode} * values at the loop begin. Use {@link MergeNode#phiPredecessorIndex(AbstractEndNode)} for this * purpose. * * @return The 0-based index of this loop end. */ public int endIndex() { return endIndex; } public void setEndIndex(int idx) { this.endIndex = idx; } @Override public Iterable<? extends Node> cfgSuccessors() { return Collections.emptyList(); } }