1/*
2 * Copyright (C) 2012, 2013 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 "LazyOperandValueProfile.h"
28
29#include "JSCInlines.h"
30
31namespace JSC {
32
33CompressedLazyOperandValueProfileHolder::CompressedLazyOperandValueProfileHolder() { }
34CompressedLazyOperandValueProfileHolder::~CompressedLazyOperandValueProfileHolder() { }
35
36void CompressedLazyOperandValueProfileHolder::computeUpdatedPredictions(const ConcurrentJITLocker& locker)
37{
38    if (!m_data)
39        return;
40
41    for (unsigned i = 0; i < m_data->size(); ++i)
42        m_data->at(i).computeUpdatedPrediction(locker);
43}
44
45LazyOperandValueProfile* CompressedLazyOperandValueProfileHolder::add(
46    const ConcurrentJITLocker&, const LazyOperandValueProfileKey& key)
47{
48    if (!m_data)
49        m_data = adoptPtr(new LazyOperandValueProfile::List());
50    else {
51        for (unsigned i = 0; i < m_data->size(); ++i) {
52            if (m_data->at(i).key() == key)
53                return &m_data->at(i);
54        }
55    }
56
57    m_data->append(LazyOperandValueProfile(key));
58    return &m_data->last();
59}
60
61LazyOperandValueProfileParser::LazyOperandValueProfileParser() { }
62LazyOperandValueProfileParser::~LazyOperandValueProfileParser() { }
63
64void LazyOperandValueProfileParser::initialize(
65    const ConcurrentJITLocker&, CompressedLazyOperandValueProfileHolder& holder)
66{
67    ASSERT(m_map.isEmpty());
68
69    if (!holder.m_data)
70        return;
71
72    LazyOperandValueProfile::List& data = *holder.m_data;
73    for (unsigned i = 0; i < data.size(); ++i)
74        m_map.add(data[i].key(), &data[i]);
75}
76
77LazyOperandValueProfile* LazyOperandValueProfileParser::getIfPresent(
78    const LazyOperandValueProfileKey& key) const
79{
80    HashMap<LazyOperandValueProfileKey, LazyOperandValueProfile*>::const_iterator iter =
81        m_map.find(key);
82
83    if (iter == m_map.end())
84        return 0;
85
86    return iter->value;
87}
88
89SpeculatedType LazyOperandValueProfileParser::prediction(
90    const ConcurrentJITLocker& locker, const LazyOperandValueProfileKey& key) const
91{
92    LazyOperandValueProfile* profile = getIfPresent(key);
93    if (!profile)
94        return SpecNone;
95
96    return profile->computeUpdatedPrediction(locker);
97}
98
99} // namespace JSC
100
101