2 * Copyright (C) 2011 Apple Inc. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
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12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
14 * its contributors may be used to endorse or promote products derived
15 * from this software without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 #include "PredictedType.h"
32 #include "ValueProfile.h"
33 #include <wtf/BoundsCheckedPointer.h>
38 const char* predictionToString(PredictedType value)
40 static const int size = 96;
41 static char description[size];
42 BoundsCheckedPointer<char> ptr(description, size);
44 if (!(value & StrongPredictionTag))
47 if (value & PredictObjectUnknown) {
48 ASSERT(!(value & (PredictObjectMask & ~PredictObjectUnknown)));
52 if (value & PredictCellOther)
53 ptr.strcat("Othercell");
55 if (value & PredictObjectOther)
56 ptr.strcat("Otherobj");
58 if (value & PredictFinalObject)
61 if (value & PredictArray)
64 if (value & PredictString)
67 if (value & PredictInt32)
70 if (value & PredictDouble)
73 if (value & PredictBoolean)
76 if (value & PredictOther)
85 PredictedType predictionFromCell(JSCell* cell)
87 const ClassInfo* classInfo = cell->structure()->classInfo();
89 if (classInfo == &JSFinalObject::s_info)
90 return PredictFinalObject;
92 if (classInfo == &JSArray::s_info)
95 if (classInfo == &JSString::s_info)
98 if (classInfo->isSubClassOf(&JSObject::s_info))
99 return PredictObjectOther;
101 return PredictCellOther;
104 PredictedType predictionFromValue(JSValue value)
108 if (value.isDouble())
109 return PredictDouble;
111 return predictionFromCell(value.asCell());
112 if (value.isBoolean())
113 return PredictBoolean;