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annotate graal/GraalCompiler/src/com/sun/c1x/graph/BlockUtil.java @ 2674:6ab73784566a

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* BlockBegin.predecessors changed to List<BlockEnd> * Node: add input/successor with given back edge index, allows for explicit ordering of predecessors/usages * Graphviz: PDF output, option to omit FrameStates * runscimark.sh: forward additional options to JVM
author Lukas Stadler <lukas.stadler@jku.at>
date Fri, 13 May 2011 15:18:41 +0200
parents 4a36a0bd6d18
children 7ed72769d51a
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1 /*
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2 * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.sun.c1x.graph;
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24
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25 import com.sun.c1x.ir.*;
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26
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27 /**
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28 * The {@code BlockUtil} class contains a number of utilities for manipulating a CFG of basic blocks.
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29 *
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30 * @author Ben L. Titzer
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31 */
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32 public class BlockUtil {
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33
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34 /**
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35 * Disconnects the specified block from all other blocks.
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36 * @param block the block to remove from the graph
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37 */
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38 public static void disconnectFromGraph(BlockBegin block) {
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39 for (BlockEnd p : block.blockPredecessors()) {
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40 p.blockSuccessors().remove(block);
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41 }
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42 for (BlockBegin s : block.end().blockSuccessors()) {
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43 s.blockPredecessors().remove(block);
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44 }
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45 }
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46 }