Mercurial > hg > graal-jvmci-8

annotate jvmci/jdk.vm.ci.code/src/jdk/vm/ci/code/RegisterConfig.java @ 24225:a2dbb6fcc923

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Added tag jvmci-0.33 for changeset 3aed4cb813f4
author Doug Simon <doug.simon@oracle.com>
date Fri, 18 Aug 2017 22:47:33 +0200
parents 9e1235406b59
children
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1 /*
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2 * Copyright (c) 2009, 2016, 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 jdk.vm.ci.code;
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24
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25 import jdk.vm.ci.code.CallingConvention.Type;
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26 import jdk.vm.ci.meta.JavaKind;
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27 import jdk.vm.ci.meta.JavaType;
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28 import jdk.vm.ci.meta.PlatformKind;
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29 import jdk.vm.ci.meta.ValueKind;
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30
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31 /**
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32 * A register configuration binds roles and {@linkplain RegisterAttributes attributes} to physical
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33 * registers.
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34 */
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35 public interface RegisterConfig {
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36
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37 /**
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38 * Gets the register to be used for returning a value of a given kind.
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39 */
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40 Register getReturnRegister(JavaKind kind);
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41
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42 /**
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43 * Gets the maximum allowed size of the frame.
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44 */
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45 default int getMaximumFrameSize() {
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46 return Integer.MAX_VALUE;
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47 }
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48
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49 /**
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50 * Gets the register used as the frame pointer. Spill slots and outgoing stack-based arguments
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51 * are addressed relative to this register.
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52 */
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53 Register getFrameRegister();
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54
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55 /**
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56 * Gets the calling convention describing how arguments are passed.
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57 *
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58 * @param type the type of calling convention being requested
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59 * @param returnType the return type (can be null for methods returning {@code void})
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60 * @param parameterTypes the types of the arguments of the call
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61 * @param valueKindFactory the factory to create custom {@link ValueKind ValueKinds}
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62 */
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63 CallingConvention getCallingConvention(Type type, JavaType returnType, JavaType[] parameterTypes, ValueKindFactory<?> valueKindFactory);
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64
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65 /**
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66 * Gets the ordered set of registers that are can be used to pass parameters according to a
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67 * given calling convention.
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68 *
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69 * @param type the type of calling convention
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70 * @param kind specifies what kind of registers is being requested
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71 * @return the ordered set of registers that may be used to pass parameters in a call conforming
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72 * to {@code type}
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73 */
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74 RegisterArray getCallingConventionRegisters(Type type, JavaKind kind);
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75
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76 /**
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77 * Gets the set of all registers that might be used by the register allocator.
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78 *
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79 * To get the set of registers the register allocator is allowed to use see
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80 * {@link RegisterAllocationConfig#getAllocatableRegisters()}
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81 */
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82 @SuppressWarnings("javadoc")
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83 RegisterArray getAllocatableRegisters();
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84
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85 /**
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86 * Filters a set of registers and returns only those that can be used by the register allocator
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87 * for a value of a particular kind.
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88 */
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89 RegisterArray filterAllocatableRegisters(PlatformKind kind, RegisterArray registers);
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90
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91 /**
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92 * Gets the registers whose values must be preserved by a method across any call it makes.
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93 */
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94 RegisterArray getCallerSaveRegisters();
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95
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96 /**
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97 * Gets the registers whose values must be preserved by the callee.
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98 */
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99 RegisterArray getCalleeSaveRegisters();
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100
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101 /**
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102 * Gets a map from register {@linkplain Register#number numbers} to register
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103 * {@linkplain RegisterAttributes attributes} for this register configuration.
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104 *
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105 * @return an array where an element at index i holds the attributes of the register whose
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106 * number is i
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107 */
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108 RegisterAttributes[] getAttributesMap();
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109
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110 /**
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111 * Determines if all {@link #getAllocatableRegisters() allocatable} registers are
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112 * {@link #getCallerSaveRegisters() caller saved}.
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113 */
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114 boolean areAllAllocatableRegistersCallerSaved();
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115 }