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annotate graal/GraalCompiler/src/com/sun/c1x/ir/Base.java @ 2622:91d3952f7eb7

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Framestate work : using stateAFter and reducting the number of nodes with framestates. Intermediate state (does not pass tests)
author Gilles Duboscq <gilles.duboscq@oracle.com>
date Tue, 10 May 2011 12:37:46 +0200
parents 0c6564c254af
children b2c1e959be46
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1 /*
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2 * Copyright (c) 2009, 2011, 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.ir;
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24
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25 import com.oracle.graal.graph.*;
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26 import com.sun.c1x.debug.*;
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27 import com.sun.cri.ci.*;
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28
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29 /**
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30 * The {@code Base} instruction represents the end of the entry block of the procedure that has
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31 * both the standard entry and the OSR entry as successors.
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32 */
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33 public final class Base extends BlockEnd {
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34
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35 private static final int INPUT_COUNT = 0;
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36 private static final int SUCCESSOR_COUNT = 0;
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37
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38 /**
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39 * Constructs a new Base instruction.
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40 * @param standardEntry the standard entrypoint block
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41 * @param graph
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42 */
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43 public Base(BlockBegin standardEntry, Graph graph) {
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44 super(CiKind.Illegal, null, false, 1, INPUT_COUNT, SUCCESSOR_COUNT, graph);
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45 assert standardEntry.isStandardEntry();
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46 setBlockSuccessor(0, standardEntry);
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47 }
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48
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49 /**
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50 * Gets the standard entrypoint block.
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51 * @return the standard entrypoint block
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52 */
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53 public BlockBegin standardEntry() {
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54 return defaultSuccessor();
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55 }
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56
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57 /**
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58 * Gets the OSR entrypoint block, if it exists.
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59 * @return the OSR entrypoint bock, if it exists; {@code null} otherwise
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60 */
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61 public BlockBegin osrEntry() {
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62 return blockSuccessorCount() < 2 ? null : blockSuccessor(0);
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63 }
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64
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65 @Override
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66 public void accept(ValueVisitor v) {
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67 v.visitBase(this);
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68 }
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69
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70 @Override
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71 public void print(LogStream out) {
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72 out.print("std entry B").print(standardEntry().blockID);
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73 if (blockSuccessors().size() > 1) {
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74 out.print(" osr entry B").print(osrEntry().blockID);
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75 }
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76 }
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77 }