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annotate graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/cfg/CFGVerifier.java @ 6529:2e96dc4eb8e2

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renamed package: com.oracle.graal.lir.cfg -> com.oracle.graal.nodes.cfg
author Doug Simon <doug.simon@oracle.com>
date Mon, 08 Oct 2012 17:30:11 +0200
parents graal/com.oracle.graal.nodes/src/com/oracle/graal/lir/cfg/CFGVerifier.java@c5afcc2ebd3d
children 5e3d1a68664e
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1 /*
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2 * Copyright (c) 2012, 2012, 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.oracle.graal.nodes.cfg;
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24
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25 public class CFGVerifier {
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26 public static boolean verify(ControlFlowGraph cfg) {
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27 for (Block block : cfg.getBlocks()) {
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28 assert block.getId() >= 0;
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29 assert cfg.getBlocks()[block.getId()] == block;
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30
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31 for (Block pred : block.getPredecessors()) {
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32 assert pred.getSuccessors().contains(block);
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33 assert pred.getId() < block.getId() || pred.isLoopEnd();
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34 }
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35
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36 for (Block sux : block.getSuccessors()) {
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37 assert sux.getPredecessors().contains(block);
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38 assert sux.getId() > block.getId() || sux.isLoopHeader();
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39 }
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40
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41 if (block.getDominator() != null) {
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42 assert block.getDominator().getId() < block.getId();
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43 assert block.getDominator().getDominated().contains(block);
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44 }
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45 for (Block dominated : block.getDominated()) {
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46 assert dominated.getId() > block.getId();
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47 assert dominated.getDominator() == block;
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48 }
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49
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50 assert cfg.getLoops() == null || !block.isLoopHeader() || block.getLoop().header == block : block.beginNode;
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51 }
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52
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53 if (cfg.getLoops() != null) {
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54 for (Loop loop : cfg.getLoops()) {
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55 assert loop.header.isLoopHeader();
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56
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57 for (Block block : loop.blocks) {
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58 assert block.getId() >= loop.header.getId();
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59
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60 Loop blockLoop = block.getLoop();
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61 while (blockLoop != loop) {
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62 assert blockLoop != null;
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63 blockLoop = blockLoop.parent;
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64 }
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65
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66 if (!(block.isLoopHeader() && block.getLoop() == loop)) {
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67 for (Block pred : block.getPredecessors()) {
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68 if (!loop.blocks.contains(pred)) {
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69 return false;
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70 }
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71 }
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72 }
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73 }
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74
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75 for (Block block : loop.exits) {
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76 assert block.getId() >= loop.header.getId();
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77
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78 Loop blockLoop = block.getLoop();
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79 while (blockLoop != null) {
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80 blockLoop = blockLoop.parent;
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81 assert blockLoop != loop;
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82 }
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83 }
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84 }
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85 }
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86
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87 return true;
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88 }
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89 }