1/*
2 * Copyright (C) 2014 Apple Inc. All rights reserved.
3 * Copyright (C) 2014 Saam Barati. <[email protected]>
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#pragma once
28
29#include "CPU.h"
30#include "MacroAssembler.h"
31#include <wtf/Vector.h>
32
33namespace JSC {
34
35class CCallHelpers;
36class LLIntOffsetsExtractor;
37
38class BasicBlockLocation {
39 WTF_MAKE_FAST_ALLOCATED;
40public:
41 typedef std::pair<int, int> Gap;
42
43 BasicBlockLocation(int startOffset = -1, int endOffset = -1);
44
45 int startOffset() const { return m_startOffset; }
46 int endOffset() const { return m_endOffset; }
47 void setStartOffset(int startOffset) { m_startOffset = startOffset; }
48 void setEndOffset(int endOffset) { m_endOffset = endOffset; }
49 bool hasExecuted() const { return m_executionCount > 0; }
50 size_t executionCount() const { return m_executionCount; }
51 void insertGap(int, int);
52 Vector<Gap> getExecutedRanges() const;
53 JS_EXPORT_PRIVATE void dumpData() const;
54#if ENABLE(JIT)
55#if USE(JSVALUE64)
56 void emitExecuteCode(CCallHelpers&) const;
57#else
58 void emitExecuteCode(CCallHelpers&, MacroAssembler::RegisterID scratch) const;
59#endif
60#endif
61
62private:
63 friend class LLIntOffsetsExtractor;
64
65 int m_startOffset;
66 int m_endOffset;
67 Vector<Gap> m_gaps;
68 UCPURegister m_executionCount;
69};
70
71} // namespace JSC
72