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annotate graal/GraalCompiler/src/com/sun/c1x/ir/IRScope.java @ 2519:f6125fb5bfbc

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Removed intrinsics.
author Thomas Wuerthinger <thomas@wuerthinger.net>
date Wed, 27 Apr 2011 16:25:32 +0200
parents 16b9a8b5ad39
children
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2507
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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.sun.c1x.value.*;
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26 import com.sun.cri.ci.*;
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27 import com.sun.cri.ri.*;
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28
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29 /**
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30 * The {@code IRScope} class represents an inlining context in the compilation
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31 * of a method.
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32 *
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33 * @author Ben L. Titzer
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34 */
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35 public class IRScope {
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36
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37 public final IRScope caller;
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38 public final RiMethod method;
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39 public final int level;
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40 CiCodePos callerCodePos;
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41
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42 /**
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43 * The frame state at the call site of this scope's caller or {@code null}
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44 * if this is not a nested scope.
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45 */
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46 public final FrameState callerState;
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47
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48 /**
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49 * The maximum number of locks held in this scope at any one time
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50 * (c.f. maxStack and maxLocals of the Code attribute in a class file).
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51 */
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52 int maxLocks;
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53
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54 CiBitMap storesInLoops;
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55
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56 public IRScope(IRScope caller, FrameState callerState, RiMethod method, int osrBCI) {
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57 this.caller = caller;
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58 this.callerState = callerState;
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59 this.method = method;
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60 this.level = caller == null ? 0 : 1 + caller.level;
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61 }
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62
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63 /**
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64 * Updates the maximum number of locks held in this scope at any one time.
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65 *
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66 * @param locks a lock count that will replace the current {@linkplain #maxLocks() max locks} for this scope if it is greater
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67 */
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68 public void updateMaxLocks(int locks) {
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69 if (locks > maxLocks) {
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70 maxLocks = locks;
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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 * Gets the number of locks in this IR scope.
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76 * @return the number of locks
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77 */
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78 public final int maxLocks() {
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79 return maxLocks;
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80 }
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81
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82 /**
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83 * Gets the bytecode index of the call site that called this method.
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84 * @return the call site's bytecode index
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85 */
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86 public final int callerBCI() {
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87 return callerState == null ? -1 : callerState.bci;
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88 }
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89
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90 /**
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91 * Returns whether this IR scope is the top scope (i.e. has no caller).
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92 * @return {@code true} if this inlining scope has no parent
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93 */
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94 public final boolean isTopScope() {
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95 return caller == null;
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96 }
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97
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98 /**
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99 * Gets the phi bitmap for this IR scope. The phi bitmap stores
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100 * whether a phi instruction is required for each local variable.
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101 * @return the phi bitmap for this IR scope
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102 */
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103 public final CiBitMap getStoresInLoops() {
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104 return storesInLoops;
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105 }
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106
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107 public final void setStoresInLoops(CiBitMap storesInLoops) {
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108 this.storesInLoops = storesInLoops;
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109 }
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110
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111 @Override
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112 public String toString() {
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113 if (caller == null) {
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114 return "root-scope: " + method;
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115 } else {
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116 return "inlined-scope: " + method + " [caller bci: " + callerState.bci + "]";
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117 }
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118 }
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119
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120 public CiCodePos callerCodePos() {
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121 if (caller != null && callerCodePos == null) {
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122 callerCodePos = caller.toCodePos(callerBCI());
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123 }
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124 return callerCodePos;
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125 }
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126
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127 public CiCodePos toCodePos(int bci) {
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128 return new CiCodePos(callerCodePos(), method, bci);
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129 }
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130 }