Mercurial > hg > graal-jvmci-8
annotate jvmci/jdk.vm.ci.code/src/jdk/vm/ci/code/CallingConvention.java @ 24218:719853999215 jvmci-0.32
Merge with jdk8u141-b15
author | Doug Simon <doug.simon@oracle.com> |
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date | Mon, 14 Aug 2017 23:20:38 +0200 |
parents | 9e1235406b59 |
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rev | line source |
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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
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changeset
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23 package jdk.vm.ci.code; |
22054 | 24 |
22672
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Rename jdk.internal.jvmci to jdk.vm.ci
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
22569
diff
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25 import static jdk.vm.ci.code.ValueUtil.isAllocatableValue; |
1bbd4a7c274b
Rename jdk.internal.jvmci to jdk.vm.ci
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
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26 import static jdk.vm.ci.code.ValueUtil.isStackSlot; |
1bbd4a7c274b
Rename jdk.internal.jvmci to jdk.vm.ci
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
22569
diff
changeset
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27 import jdk.vm.ci.meta.AllocatableValue; |
1bbd4a7c274b
Rename jdk.internal.jvmci to jdk.vm.ci
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
22569
diff
changeset
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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
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Make CallingConvention.Type extensible; remove unused stackOnly parameter
Christian Wimmer <christian.wimmer@oracle.com>
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37 * Marker interface denoting the type of a call for which a calling convention is requested. |
22054 | 38 */ |
22783
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Make CallingConvention.Type extensible; remove unused stackOnly parameter
Christian Wimmer <christian.wimmer@oracle.com>
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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
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[Findbugs] various warnings reported for JVMCI sources (JDK-8159613)
Doug Simon <doug.simon@oracle.com>
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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 } |