1/*
2 * Copyright (C) 2012 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "IndexingType.h"
28
29#include "JSCInlines.h"
30
31namespace JSC {
32
33IndexingType leastUpperBoundOfIndexingTypes(IndexingType a, IndexingType b)
34{
35 // It doesn't make sense to LUB something that is an array with something that isn't.
36 ASSERT((a & IsArray) == (b & IsArray));
37
38 // Boy, this sure is easy right now.
39 return std::max(a, b);
40}
41
42IndexingType leastUpperBoundOfIndexingTypeAndType(IndexingType indexingType, SpeculatedType type)
43{
44 if (!type)
45 return indexingType;
46 switch (indexingType) {
47 case ALL_BLANK_INDEXING_TYPES:
48 case ALL_UNDECIDED_INDEXING_TYPES:
49 case ALL_INT32_INDEXING_TYPES:
50 if (isInt32Speculation(type))
51 return (indexingType & ~IndexingShapeMask) | Int32Shape;
52 // FIXME: Should this really say that it wants a double for NaNs.
53 if (isFullNumberSpeculation(type))
54 return (indexingType & ~IndexingShapeMask) | DoubleShape;
55 return (indexingType & ~IndexingShapeMask) | ContiguousShape;
56 case ALL_DOUBLE_INDEXING_TYPES:
57 // FIXME: Should this really say that it wants a double for NaNs.
58 if (isFullNumberSpeculation(type))
59 return indexingType;
60 return (indexingType & ~IndexingShapeMask) | ContiguousShape;
61 case ALL_CONTIGUOUS_INDEXING_TYPES:
62 case ALL_ARRAY_STORAGE_INDEXING_TYPES:
63 return indexingType;
64 default:
65 CRASH();
66 return 0;
67 }
68}
69
70IndexingType leastUpperBoundOfIndexingTypeAndValue(IndexingType indexingType, JSValue value)
71{
72 return leastUpperBoundOfIndexingTypes(indexingType, indexingTypeForValue(value) | (indexingType & IsArray));
73}
74
75void dumpIndexingType(PrintStream& out, IndexingType indexingType)
76{
77 const char* basicName;
78 switch (indexingType & AllArrayTypes) {
79 case NonArray:
80 basicName = "NonArray";
81 break;
82 case NonArrayWithInt32:
83 basicName = "NonArrayWithInt32";
84 break;
85 case NonArrayWithDouble:
86 basicName = "NonArrayWithDouble";
87 break;
88 case NonArrayWithContiguous:
89 basicName = "NonArrayWithContiguous";
90 break;
91 case NonArrayWithArrayStorage:
92 basicName = "NonArrayWithArrayStorage";
93 break;
94 case NonArrayWithSlowPutArrayStorage:
95 basicName = "NonArrayWithSlowPutArrayStorage";
96 break;
97 case ArrayClass:
98 basicName = "ArrayClass";
99 break;
100 case ArrayWithUndecided:
101 basicName = "ArrayWithUndecided";
102 break;
103 case ArrayWithInt32:
104 basicName = "ArrayWithInt32";
105 break;
106 case ArrayWithDouble:
107 basicName = "ArrayWithDouble";
108 break;
109 case ArrayWithContiguous:
110 basicName = "ArrayWithContiguous";
111 break;
112 case ArrayWithArrayStorage:
113 basicName = "ArrayWithArrayStorage";
114 break;
115 case ArrayWithSlowPutArrayStorage:
116 basicName = "ArrayWithSlowPutArrayStorage";
117 break;
118 case CopyOnWriteArrayWithInt32:
119 basicName = "CopyOnWriteArrayWithInt32";
120 break;
121 case CopyOnWriteArrayWithDouble:
122 basicName = "CopyOnWriteArrayWithDouble";
123 break;
124 case CopyOnWriteArrayWithContiguous:
125 basicName = "CopyOnWriteArrayWithContiguous";
126 break;
127 default:
128 basicName = "Unknown!";
129 break;
130 }
131
132 out.printf("%s%s", basicName, (indexingType & MayHaveIndexedAccessors) ? "|MayHaveIndexedAccessors" : "");
133}
134
135} // namespace JSC
136
137