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/*
* Copyright (C) 2015 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.
*/
#ifndef B3IndexMap_h
#define B3IndexMap_h
#if ENABLE(B3_JIT)
#include <wtf/Vector.h>
namespace JSC { namespace B3 {
// This is a map for keys that have an index(). It's super efficient for BasicBlocks. It's only
// efficient for Values if you don't create too many of these maps, since Values can have very
// sparse indices and there are a lot of Values.
template<typename Key, typename Value>
class IndexMap {
public:
explicit IndexMap(size_t size = 0)
{
m_vector.fill(Value(), size);
}
void resize(size_t size)
{
m_vector.fill(Value(), size);
}
void clear()
{
m_vector.fill(Value(), m_vector.size());
}
size_t size() const { return m_vector.size(); }
Value& operator[](size_t index)
{
return m_vector[index];
}
const Value& operator[](size_t index) const
{
return m_vector[index];
}
Value& operator[](Key* key)
{
return m_vector[key->index()];
}
const Value& operator[](Key* key) const
{
return m_vector[key->index()];
}
private:
Vector<Value> m_vector;
};
} } // namespace JSC::B3
#endif // ENABLE(B3_JIT)
#endif // B3IndexMap_h
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