/*
 * Copyright (C) 2015-2023 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 */

#include "config.h"
#include "FTLLazySlowPath.h"

#if ENABLE(FTL_JIT)

#include "LinkBuffer.h"
#include 

namespace JSC { namespace FTL {

WTF_MAKE_TZONE_ALLOCATED_IMPL(LazySlowPath);

LazySlowPath::~LazySlowPath() = default;

void LazySlowPath::initialize(
    CodeLocationJump patchableJump, CodeLocationLabel done,
    CodeLocationLabel exceptionTarget,
    const RegisterSet& usedRegisters, CallSiteIndex callSiteIndex, RefPtr generator
    )
{
    m_patchableJump = patchableJump;
    m_done = done;
    m_exceptionTarget = exceptionTarget;
    m_usedRegisters = usedRegisters.toScalarRegisterSet();
    m_callSiteIndex = callSiteIndex;
    m_generator = generator;
}

void LazySlowPath::generate(CodeBlock* codeBlock)
{
    RELEASE_ASSERT(!m_stub);

    CCallHelpers jit(codeBlock);
    GenerationParams params;
    CCallHelpers::JumpList exceptionJumps;
    params.exceptionJumps = m_exceptionTarget ? &exceptionJumps : nullptr;
    params.lazySlowPath = this;

    m_generator->run(jit, params);

    params.doneJumps.linkThunk(m_done, &jit);
    if (m_exceptionTarget)
        exceptionJumps.linkThunk(m_exceptionTarget, &jit);
    LinkBuffer linkBuffer(jit, codeBlock, LinkBuffer::Profile::FTLThunk, JITCompilationMustSucceed);
    m_stub = FINALIZE_CODE_FOR(codeBlock, linkBuffer, JITStubRoutinePtrTag, nullptr, "Lazy slow path call stub");

    MacroAssembler::repatchJump(m_patchableJump, CodeLocationLabel(m_stub.code()));
}

} } // namespace JSC::FTL

#endif // ENABLE(FTL_JIT)