1/*
2 * Copyright (C) 2013, 2016 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 "DFGAtTailAbstractState.h"
28#include "DFGBlockMapInlines.h"
29
30#if ENABLE(DFG_JIT)
31
32#include "JSCInlines.h"
33
34namespace JSC { namespace DFG {
35
36AtTailAbstractState::AtTailAbstractState(Graph& graph)
37 : m_graph(graph)
38 , m_valuesAtTailMap(m_graph)
39{
40 for (BasicBlock* block : graph.blocksInNaturalOrder()) {
41 auto& valuesAtTail = m_valuesAtTailMap.at(block);
42 valuesAtTail.clear();
43 for (auto& valueAtTailPair : block->ssa->valuesAtTail)
44 valuesAtTail.add(valueAtTailPair.node, valueAtTailPair.value);
45 }
46}
47
48AtTailAbstractState::~AtTailAbstractState() { }
49
50void AtTailAbstractState::createValueForNode(NodeFlowProjection node)
51{
52 m_valuesAtTailMap.at(m_block).add(node, AbstractValue());
53}
54
55AbstractValue& AtTailAbstractState::forNode(NodeFlowProjection node)
56{
57 auto& valuesAtTail = m_valuesAtTailMap.at(m_block);
58 HashMap<NodeFlowProjection, AbstractValue>::iterator iter = valuesAtTail.find(node);
59 DFG_ASSERT(m_graph, node.node(), iter != valuesAtTail.end());
60 return iter->value;
61}
62
63} } // namespace JSC::DFG
64
65#endif // ENABLE(DFG_JIT)
66
67