Mercurial > hg > graal-jvmci-8
annotate jvmci/jdk.vm.ci.code/src/jdk/vm/ci/code/CallingConvention.java @ 24225:a2dbb6fcc923
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 |
| rev | line source |
|---|---|
| 22054 | 1 /* |
| 2 * Copyright (c) 2009, 2012, Oracle and/or its affiliates. All rights reserved. | |
| 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 20 * or visit www.oracle.com if you need additional information or have any | |
| 21 * questions. | |
| 22 */ | |
|
22672
1bbd4a7c274b
Rename jdk.internal.jvmci to jdk.vm.ci
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
22569
diff
changeset
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23 package jdk.vm.ci.code; |
| 22054 | 24 |
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22672
1bbd4a7c274b
Rename jdk.internal.jvmci to jdk.vm.ci
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
22569
diff
changeset
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25 import static jdk.vm.ci.code.ValueUtil.isAllocatableValue; |
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1bbd4a7c274b
Rename jdk.internal.jvmci to jdk.vm.ci
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
22569
diff
changeset
|
26 import static jdk.vm.ci.code.ValueUtil.isStackSlot; |
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1bbd4a7c274b
Rename jdk.internal.jvmci to jdk.vm.ci
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
22569
diff
changeset
|
27 import jdk.vm.ci.meta.AllocatableValue; |
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1bbd4a7c274b
Rename jdk.internal.jvmci to jdk.vm.ci
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
22569
diff
changeset
|
28 import jdk.vm.ci.meta.Value; |
| 22054 | 29 |
| 30 /** | |
| 31 * A calling convention describes the locations in which the arguments for a call are placed and the | |
| 32 * location in which the return value is placed if the call is not void. | |
| 33 */ | |
| 34 public class CallingConvention { | |
| 35 | |
| 36 /** | |
|
22783
d63506bb5237
Make CallingConvention.Type extensible; remove unused stackOnly parameter
Christian Wimmer <christian.wimmer@oracle.com>
parents:
22672
diff
changeset
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37 * Marker interface denoting the type of a call for which a calling convention is requested. |
| 22054 | 38 */ |
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22783
d63506bb5237
Make CallingConvention.Type extensible; remove unused stackOnly parameter
Christian Wimmer <christian.wimmer@oracle.com>
parents:
22672
diff
changeset
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39 public interface Type { |
| 22054 | 40 } |
| 41 | |
| 42 /** | |
| 43 * The amount of stack space (in bytes) required for the stack-based arguments of the call. | |
| 44 */ | |
| 45 private final int stackSize; | |
| 46 | |
| 47 private final AllocatableValue returnLocation; | |
| 48 | |
| 49 /** | |
| 50 * The ordered locations in which the arguments are placed. | |
| 51 */ | |
| 52 private final AllocatableValue[] argumentLocations; | |
| 53 | |
| 54 /** | |
| 55 * Creates a description of the registers and stack locations used by a call. | |
| 56 * | |
| 57 * @param stackSize amount of stack space (in bytes) required for the stack-based arguments of | |
| 58 * the call | |
| 59 * @param returnLocation the location for the return value or {@link Value#ILLEGAL} if a void | |
| 60 * call | |
| 61 * @param argumentLocations the ordered locations in which the arguments are placed | |
| 62 */ | |
| 63 public CallingConvention(int stackSize, AllocatableValue returnLocation, AllocatableValue... argumentLocations) { | |
| 64 assert argumentLocations != null; | |
| 65 assert returnLocation != null; | |
| 66 this.argumentLocations = argumentLocations; | |
| 67 this.stackSize = stackSize; | |
| 68 this.returnLocation = returnLocation; | |
| 69 assert verify(); | |
| 70 } | |
| 71 | |
| 72 /** | |
| 73 * Gets the location for the return value or {@link Value#ILLEGAL} if a void call. | |
| 74 */ | |
| 75 public AllocatableValue getReturn() { | |
| 76 return returnLocation; | |
| 77 } | |
| 78 | |
| 79 /** | |
| 80 * Gets the location for the {@code index}'th argument. | |
| 81 */ | |
| 82 public AllocatableValue getArgument(int index) { | |
| 83 return argumentLocations[index]; | |
| 84 } | |
| 85 | |
| 86 /** | |
| 87 * Gets the amount of stack space (in bytes) required for the stack-based arguments of the call. | |
| 88 */ | |
| 89 public int getStackSize() { | |
| 90 return stackSize; | |
| 91 } | |
| 92 | |
| 93 /** | |
| 94 * Gets the number of locations required for the arguments. | |
| 95 */ | |
| 96 public int getArgumentCount() { | |
| 97 return argumentLocations.length; | |
| 98 } | |
| 99 | |
| 100 /** | |
| 101 * Gets the locations required for the arguments. | |
| 102 */ | |
|
23700
9e1235406b59
[Findbugs] various warnings reported for JVMCI sources (JDK-8159613)
Doug Simon <doug.simon@oracle.com>
parents:
22783
diff
changeset
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103 @SuppressFBWarnings(value = "EI_EXPOSE_REP", justification = "FB false positive") |
| 22054 | 104 public AllocatableValue[] getArguments() { |
| 105 if (argumentLocations.length == 0) { | |
| 106 return argumentLocations; | |
| 107 } | |
| 108 return argumentLocations.clone(); | |
| 109 } | |
| 110 | |
| 111 @Override | |
| 112 public String toString() { | |
| 113 StringBuilder sb = new StringBuilder(); | |
| 114 sb.append("CallingConvention["); | |
| 115 String sep = ""; | |
| 116 for (Value op : argumentLocations) { | |
| 117 sb.append(sep).append(op); | |
| 118 sep = ", "; | |
| 119 } | |
| 120 if (!returnLocation.equals(Value.ILLEGAL)) { | |
| 121 sb.append(" -> ").append(returnLocation); | |
| 122 } | |
| 123 sb.append("]"); | |
| 124 return sb.toString(); | |
| 125 } | |
| 126 | |
| 127 private boolean verify() { | |
| 128 for (int i = 0; i < argumentLocations.length; i++) { | |
| 129 Value location = argumentLocations[i]; | |
| 130 assert isStackSlot(location) || isAllocatableValue(location); | |
| 131 } | |
| 132 return true; | |
| 133 } | |
| 134 } |