1/*
2 * Copyright (C) 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 "FTLExitThunkGenerator.h"
28
29#if ENABLE(FTL_JIT)
30
31#include "FTLOSRExitCompilationInfo.h"
32#include "FTLState.h"
33
34namespace JSC { namespace FTL {
35
36using namespace JSC::DFG;
37
38ExitThunkGenerator::ExitThunkGenerator(State& state)
39    : CCallHelpers(&state.graph.m_vm, state.graph.m_codeBlock)
40    , m_state(state)
41    , m_didThings(false)
42{
43}
44
45ExitThunkGenerator::~ExitThunkGenerator()
46{
47}
48
49void ExitThunkGenerator::emitThunk(unsigned index)
50{
51    OSRExitCompilationInfo& info = m_state.finalizer->osrExit[index];
52
53    info.m_thunkLabel = label();
54    pushToSaveImmediateWithoutTouchingRegisters(TrustedImm32(index));
55    info.m_thunkJump = patchableJump();
56
57    m_didThings = true;
58}
59
60void ExitThunkGenerator::emitThunks()
61{
62    for (unsigned i = 0; i < m_state.finalizer->osrExit.size(); ++i)
63        emitThunk(i);
64}
65
66} } // namespace JSC::FTL
67
68#endif // ENABLE(FTL_JIT)
69
70