1/*
2 * Copyright (C) 2015 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 "B3UseCounts.h"
28
29#if ENABLE(B3_JIT)
30
31#include "B3Procedure.h"
32#include "B3ValueInlines.h"
33
34namespace JSC { namespace B3 {
35
36UseCounts::UseCounts(Procedure& procedure)
37 : m_counts(procedure.values().size())
38{
39 Vector<Value*, 64> children;
40 for (Value* value : procedure.values()) {
41 children.shrink(0);
42 for (Value* child : value->children()) {
43 m_counts[child].numUses++;
44 children.append(child);
45 }
46 std::sort(children.begin(), children.end());
47 Value* last = nullptr;
48 for (Value* child : children) {
49 if (child == last)
50 continue;
51
52 m_counts[child].numUsingInstructions++;
53 last = child;
54 }
55 }
56}
57
58UseCounts::~UseCounts()
59{
60}
61
62} } // namespace JSC::B3
63
64#endif // ENABLE(B3_JIT)
65