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annotate graal/com.oracle.max.cri/src/com/oracle/max/cri/ri/RiRegisterAttributes.java @ 4527:a0cca63cd366

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fixed exceptionSeen profiling information
author Christian Haeubl <christian.haeubl@oracle.com>
date Tue, 07 Feb 2012 12:09:11 -0800
parents aaac4894175c
children
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1 /*
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2 * Copyright (c) 2010, 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.oracle.max.cri.ri;
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24
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25 import java.util.*;
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26
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27 import com.oracle.max.cri.ci.*;
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28
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29 /**
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30 * A collection of register attributes. The specific attribute values for a register may be
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31 * local to a compilation context. For example, a {@link RiRegisterConfig} in use during
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32 * a compilation will determine which registers are callee saved.
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33 */
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34 public class RiRegisterAttributes {
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35
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36 /**
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37 * Denotes a register whose value preservation (if required) across a call is the responsibility of the caller.
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38 */
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39 public final boolean isCallerSave;
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40
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41 /**
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42 * Denotes a register whose value preservation (if required) across a call is the responsibility of the callee.
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43 */
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44 public final boolean isCalleeSave;
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45
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46 /**
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47 * Denotes a register that is available for use by a register allocator.
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48 */
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49 public final boolean isAllocatable;
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50
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51 /**
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52 * Denotes a register guaranteed to be non-zero if read in compiled Java code.
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53 * For example, a register dedicated to holding the current thread.
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54 */
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55 public boolean isNonZero;
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56
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57 public RiRegisterAttributes(boolean isCallerSave, boolean isCalleeSave, boolean isAllocatable) {
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58 this.isCallerSave = isCallerSave;
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59 this.isCalleeSave = isCalleeSave;
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60 this.isAllocatable = isAllocatable;
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61 }
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62
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63 public static final RiRegisterAttributes NONE = new RiRegisterAttributes(false, false, false);
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64
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65 /**
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66 * Creates a map from register {@linkplain CiRegister#number numbers} to register
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67 * {@linkplain RiRegisterAttributes attributes} for a given register configuration and set of
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68 * registers.
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69 *
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70 * @param registerConfig a register configuration
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71 * @param registers a set of registers
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72 * @return an array whose length is the max register number in {@code registers} plus 1. An element at index i holds
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73 * the attributes of the register whose number is i.
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74 */
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75 public static RiRegisterAttributes[] createMap(RiRegisterConfig registerConfig, CiRegister[] registers) {
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76 RiRegisterAttributes[] map = new RiRegisterAttributes[registers.length];
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77 for (CiRegister reg : registers) {
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78 if (reg != null) {
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79 CiCalleeSaveLayout csl = registerConfig.getCalleeSaveLayout();
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80 RiRegisterAttributes attr = new RiRegisterAttributes(
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81 Arrays.asList(registerConfig.getCallerSaveRegisters()).contains(reg),
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82 csl == null ? false : Arrays.asList(csl.registers).contains(reg),
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83 Arrays.asList(registerConfig.getAllocatableRegisters()).contains(reg));
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84 if (map.length <= reg.number) {
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85 map = Arrays.copyOf(map, reg.number + 1);
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86 }
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87 map[reg.number] = attr;
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88 }
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89 }
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90 for (int i = 0; i < map.length; i++) {
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91 if (map[i] == null) {
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92 map[i] = NONE;
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93 }
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94 }
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95 return map;
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96 }
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97 }