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/*
* Copyright (C) 2014 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 DFGPureValue_h
#define DFGPureValue_h
#if ENABLE(DFG_JIT)
#include "DFGNode.h"
namespace JSC { namespace DFG {
class PureValue {
public:
PureValue()
: m_op(LastNodeType)
, m_info(0)
{
}
PureValue(NodeType op, const AdjacencyList& children, uintptr_t info)
: m_op(op)
, m_children(children.sanitized())
, m_info(info)
{
ASSERT(!(defaultFlags(op) & NodeHasVarArgs));
}
PureValue(NodeType op, const AdjacencyList& children, const void* ptr)
: PureValue(op, children, bitwise_cast<uintptr_t>(ptr))
{
}
PureValue(NodeType op, const AdjacencyList& children)
: PureValue(op, children, static_cast<uintptr_t>(0))
{
}
PureValue(Node* node, uintptr_t info)
: PureValue(node->op(), node->children, info)
{
}
PureValue(Node* node, const void* ptr)
: PureValue(node->op(), node->children, ptr)
{
}
PureValue(Node* node)
: PureValue(node->op(), node->children)
{
}
PureValue(WTF::HashTableDeletedValueType)
: m_op(LastNodeType)
, m_info(1)
{
}
bool operator!() const { return m_op == LastNodeType && !m_info; }
NodeType op() const { return m_op; }
const AdjacencyList& children() const { return m_children; }
uintptr_t info() const { return m_info; }
unsigned hash() const
{
return WTF::IntHash<int>::hash(static_cast<int>(m_op)) + m_children.hash() + m_info;
}
bool operator==(const PureValue& other) const
{
return m_op == other.m_op
&& m_children == other.m_children
&& m_info == other.m_info;
}
bool isHashTableDeletedValue() const
{
return m_op == LastNodeType && m_info;
}
void dump(PrintStream& out) const;
private:
NodeType m_op;
AdjacencyList m_children;
uintptr_t m_info;
};
struct PureValueHash {
static unsigned hash(const PureValue& key) { return key.hash(); }
static bool equal(const PureValue& a, const PureValue& b) { return a == b; }
static const bool safeToCompareToEmptyOrDeleted = true;
};
} } // namespace JSC::DFG
namespace WTF {
template<typename T> struct DefaultHash;
template<> struct DefaultHash<JSC::DFG::PureValue> {
typedef JSC::DFG::PureValueHash Hash;
};
template<typename T> struct HashTraits;
template<> struct HashTraits<JSC::DFG::PureValue> : SimpleClassHashTraits<JSC::DFG::PureValue> {
static const bool emptyValueIsZero = false;
};
} // namespace WTF
namespace JSC { namespace DFG {
typedef HashMap<PureValue, Node*> PureMap;
typedef HashMap<PureValue, Vector<Node*>> PureMultiMap;
} } // namespace JSC::DFG
#endif // ENABLE(DFG_JIT)
#endif // DFGPureValue_h
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