1/*
2 * Copyright (C) 2012 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#pragma once
27
28#if ENABLE(DFG_JIT)
29
30#include "MacroAssembler.h"
31
32namespace JSC { namespace DFG {
33
34class JITCompiler;
35class SpeculativeJIT;
36
37class OSRExitJumpPlaceholder {
38public:
39 OSRExitJumpPlaceholder()
40 : m_index(std::numeric_limits<unsigned>::max())
41 {
42 }
43
44private:
45 friend class SpeculativeJIT;
46
47 OSRExitJumpPlaceholder(unsigned index)
48 : m_index(index)
49 {
50 }
51
52public:
53 bool operator!() const { return m_index == std::numeric_limits<unsigned>::max(); }
54
55 void fill(JITCompiler&, const MacroAssembler::JumpList&);
56 void fill(SpeculativeJIT*, const MacroAssembler::JumpList&);
57
58private:
59 unsigned m_index;
60};
61
62} } // namespace JSC::DFG
63
64#endif // ENABLE(DFG_JIT)
65