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IndexingType.cpp
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/*
* Copyright (C) 2012 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "IndexingType.h"
#include <wtf/StringExtras.h>
namespace JSC {
IndexingType leastUpperBoundOfIndexingTypes(IndexingType a, IndexingType b)
{
// It doesn't make sense to LUB something that is an array with something that isn't.
ASSERT((a & IsArray) == (b & IsArray));
// Boy, this sure is easy right now.
return std::max(a, b);
}
IndexingType leastUpperBoundOfIndexingTypeAndType(IndexingType indexingType, SpeculatedType type)
{
if (!type)
return indexingType;
switch (indexingType) {
case ALL_BLANK_INDEXING_TYPES:
case ALL_UNDECIDED_INDEXING_TYPES:
case ALL_INT32_INDEXING_TYPES:
if (isInt32Speculation(type))
return (indexingType & ~IndexingShapeMask) | Int32Shape;
if (isFullNumberSpeculation(type))
return (indexingType & ~IndexingShapeMask) | DoubleShape;
return (indexingType & ~IndexingShapeMask) | ContiguousShape;
case ALL_DOUBLE_INDEXING_TYPES:
if (isFullNumberSpeculation(type))
return indexingType;
return (indexingType & ~IndexingShapeMask) | ContiguousShape;
case ALL_CONTIGUOUS_INDEXING_TYPES:
case ALL_ARRAY_STORAGE_INDEXING_TYPES:
return indexingType;
default:
CRASH();
return 0;
}
}
IndexingType leastUpperBoundOfIndexingTypeAndValue(IndexingType indexingType, JSValue value)
{
return leastUpperBoundOfIndexingTypeAndType(indexingType, speculationFromValue(value));
}
void dumpIndexingType(PrintStream& out, IndexingType indexingType)
{
const char* basicName;
switch (indexingType & AllArrayTypes) {
case NonArray:
basicName = "NonArray";
break;
case NonArrayWithInt32:
basicName = "NonArrayWithInt32";
break;
case NonArrayWithDouble:
basicName = "NonArrayWithDouble";
break;
case NonArrayWithContiguous:
basicName = "NonArrayWithContiguous";
break;
case NonArrayWithArrayStorage:
basicName = "NonArrayWithArrayStorage";
break;
case NonArrayWithSlowPutArrayStorage:
basicName = "NonArrayWithSlowPutArrayStorage";
break;
case ArrayClass:
basicName = "ArrayClass";
break;
case ArrayWithUndecided:
basicName = "ArrayWithUndecided";
break;
case ArrayWithInt32:
basicName = "ArrayWithInt32";
break;
case ArrayWithDouble:
basicName = "ArrayWithDouble";
break;
case ArrayWithContiguous:
basicName = "ArrayWithContiguous";
break;
case ArrayWithArrayStorage:
basicName = "ArrayWithArrayStorage";
break;
case ArrayWithSlowPutArrayStorage:
basicName = "ArrayWithSlowPutArrayStorage";
break;
default:
basicName = "Unknown!";
break;
}
out.printf("%s%s", basicName, (indexingType & MayHaveIndexedAccessors) ? "|MayHaveIndexedAccessors" : "");
}
} // namespace JSC