void handleExitCounts(CCallHelpers& jit, const OSRExitBase& exit)
{
    jit.add32(AssemblyHelpers::TrustedImm32(1), AssemblyHelpers::AbsoluteAddress(&exit.m_count));
    
    jit.move(AssemblyHelpers::TrustedImmPtr(jit.codeBlock()), GPRInfo::regT0);
    
    AssemblyHelpers::Jump tooFewFails;
    
    jit.load32(AssemblyHelpers::Address(GPRInfo::regT0, CodeBlock::offsetOfOSRExitCounter()), GPRInfo::regT2);
    jit.add32(AssemblyHelpers::TrustedImm32(1), GPRInfo::regT2);
    jit.store32(GPRInfo::regT2, AssemblyHelpers::Address(GPRInfo::regT0, CodeBlock::offsetOfOSRExitCounter()));
    
    jit.move(AssemblyHelpers::TrustedImmPtr(jit.baselineCodeBlock()), GPRInfo::regT0);
    AssemblyHelpers::Jump reoptimizeNow = jit.branch32(
        AssemblyHelpers::GreaterThanOrEqual,
        AssemblyHelpers::Address(GPRInfo::regT0, CodeBlock::offsetOfJITExecuteCounter()),
        AssemblyHelpers::TrustedImm32(0));
        
    tooFewFails = jit.branch32(AssemblyHelpers::BelowOrEqual, GPRInfo::regT2, AssemblyHelpers::TrustedImm32(jit.codeBlock()->exitCountThresholdForReoptimization()));
    
    reoptimizeNow.link(&jit);
    
    // Reoptimize as soon as possible.
#if !NUMBER_OF_ARGUMENT_REGISTERS
    jit.poke(GPRInfo::regT0);
#else
    jit.move(GPRInfo::regT0, GPRInfo::argumentGPR0);
    ASSERT(GPRInfo::argumentGPR0 != GPRInfo::regT1);
#endif
    jit.move(AssemblyHelpers::TrustedImmPtr(bitwise_cast<void*>(triggerReoptimizationNow)), GPRInfo::regT1);
    jit.call(GPRInfo::regT1);
    AssemblyHelpers::Jump doneAdjusting = jit.jump();
    
    tooFewFails.link(&jit);
    
    // Adjust the execution counter such that the target is to only optimize after a while.
    int32_t activeThreshold =
        jit.baselineCodeBlock()->adjustedCounterValue(
            Options::thresholdForOptimizeAfterLongWarmUp());
    int32_t targetValue = ExecutionCounter::applyMemoryUsageHeuristicsAndConvertToInt(
        activeThreshold, jit.baselineCodeBlock());
    int32_t clippedValue =
        ExecutionCounter::clippedThreshold(jit.codeBlock()->globalObject(), targetValue);
    jit.store32(AssemblyHelpers::TrustedImm32(-clippedValue), AssemblyHelpers::Address(GPRInfo::regT0, CodeBlock::offsetOfJITExecuteCounter()));
    jit.store32(AssemblyHelpers::TrustedImm32(activeThreshold), AssemblyHelpers::Address(GPRInfo::regT0, CodeBlock::offsetOfJITExecutionActiveThreshold()));
    jit.store32(AssemblyHelpers::TrustedImm32(ExecutionCounter::formattedTotalCount(clippedValue)), AssemblyHelpers::Address(GPRInfo::regT0, CodeBlock::offsetOfJITExecutionTotalCount()));
    
    doneAdjusting.link(&jit);
}
void OSRExitCompiler::handleExitCounts(const OSRExit& exit)
{
    m_jit.add32(AssemblyHelpers::TrustedImm32(1), AssemblyHelpers::AbsoluteAddress(&exit.m_count));
    
    m_jit.move(AssemblyHelpers::TrustedImmPtr(m_jit.codeBlock()), GPRInfo::regT0);
    
    AssemblyHelpers::JumpList tooFewFails;
    
    if (exit.m_kind == InadequateCoverage) {
        // Proceed based on the assumption that we can profitably optimize this code once
        // it has executed enough times.
        
        m_jit.load32(AssemblyHelpers::Address(GPRInfo::regT0, CodeBlock::offsetOfForcedOSRExitCounter()), GPRInfo::regT2);
        m_jit.load32(AssemblyHelpers::Address(GPRInfo::regT0, CodeBlock::offsetOfSpeculativeSuccessCounter()), GPRInfo::regT1);
        m_jit.add32(AssemblyHelpers::TrustedImm32(1), GPRInfo::regT2);
        m_jit.add32(AssemblyHelpers::TrustedImm32(-1), GPRInfo::regT1);
        m_jit.store32(GPRInfo::regT2, AssemblyHelpers::Address(GPRInfo::regT0, CodeBlock::offsetOfForcedOSRExitCounter()));
        m_jit.store32(GPRInfo::regT1, AssemblyHelpers::Address(GPRInfo::regT0, CodeBlock::offsetOfSpeculativeSuccessCounter()));
        
        tooFewFails.append(m_jit.branch32(AssemblyHelpers::BelowOrEqual, GPRInfo::regT2, AssemblyHelpers::TrustedImm32(Options::forcedOSRExitCountForReoptimization)));
    } else {
        // Proceed based on the assumption that we can handle these exits so long as they
        // don't get too frequent.
        
        m_jit.load32(AssemblyHelpers::Address(GPRInfo::regT0, CodeBlock::offsetOfSpeculativeFailCounter()), GPRInfo::regT2);
        m_jit.load32(AssemblyHelpers::Address(GPRInfo::regT0, CodeBlock::offsetOfSpeculativeSuccessCounter()), GPRInfo::regT1);
        m_jit.add32(AssemblyHelpers::TrustedImm32(1), GPRInfo::regT2);
        m_jit.add32(AssemblyHelpers::TrustedImm32(-1), GPRInfo::regT1);
        m_jit.store32(GPRInfo::regT2, AssemblyHelpers::Address(GPRInfo::regT0, CodeBlock::offsetOfSpeculativeFailCounter()));
        m_jit.store32(GPRInfo::regT1, AssemblyHelpers::Address(GPRInfo::regT0, CodeBlock::offsetOfSpeculativeSuccessCounter()));
    
        m_jit.move(AssemblyHelpers::TrustedImmPtr(m_jit.baselineCodeBlock()), GPRInfo::regT0);
    
        tooFewFails.append(m_jit.branch32(AssemblyHelpers::BelowOrEqual, GPRInfo::regT2, AssemblyHelpers::TrustedImm32(m_jit.codeBlock()->largeFailCountThreshold())));
        m_jit.mul32(AssemblyHelpers::TrustedImm32(Options::desiredSpeculativeSuccessFailRatio), GPRInfo::regT2, GPRInfo::regT2);
    
        tooFewFails.append(m_jit.branch32(AssemblyHelpers::BelowOrEqual, GPRInfo::regT2, GPRInfo::regT1));
    }

    // Reoptimize as soon as possible.
    m_jit.store32(AssemblyHelpers::TrustedImm32(0), AssemblyHelpers::Address(GPRInfo::regT0, CodeBlock::offsetOfJITExecuteCounter()));
    m_jit.store32(AssemblyHelpers::TrustedImm32(0), AssemblyHelpers::Address(GPRInfo::regT0, CodeBlock::offsetOfJITExecutionActiveThreshold()));
    AssemblyHelpers::Jump doneAdjusting = m_jit.jump();
    
    tooFewFails.link(&m_jit);
    
    // Adjust the execution counter such that the target is to only optimize after a while.
    int32_t targetValue =
        ExecutionCounter::applyMemoryUsageHeuristicsAndConvertToInt(
            m_jit.baselineCodeBlock()->counterValueForOptimizeAfterLongWarmUp(),
            m_jit.baselineCodeBlock());
    m_jit.store32(AssemblyHelpers::TrustedImm32(-targetValue), AssemblyHelpers::Address(GPRInfo::regT0, CodeBlock::offsetOfJITExecuteCounter()));
    m_jit.store32(AssemblyHelpers::TrustedImm32(targetValue), AssemblyHelpers::Address(GPRInfo::regT0, CodeBlock::offsetOfJITExecutionActiveThreshold()));
    m_jit.store32(AssemblyHelpers::TrustedImm32(ExecutionCounter::formattedTotalCount(targetValue)), AssemblyHelpers::Address(GPRInfo::regT0, CodeBlock::offsetOfJITExecutionTotalCount()));
    
    doneAdjusting.link(&m_jit);
}
static void osrWriteBarrier(CCallHelpers& jit, GPRReg owner, GPRReg scratch)
{
    AssemblyHelpers::Jump ownerIsRememberedOrInEden = jit.jumpIfIsRememberedOrInEden(owner);

    // We need these extra slots because setupArgumentsWithExecState will use poke on x86.
#if CPU(X86)
    jit.subPtr(MacroAssembler::TrustedImm32(sizeof(void*) * 3), MacroAssembler::stackPointerRegister);
#endif

    jit.setupArgumentsWithExecState(owner);
    jit.move(MacroAssembler::TrustedImmPtr(reinterpret_cast<void*>(operationOSRWriteBarrier)), scratch);
    jit.call(scratch);

#if CPU(X86)
    jit.addPtr(MacroAssembler::TrustedImm32(sizeof(void*) * 3), MacroAssembler::stackPointerRegister);
#endif

    ownerIsRememberedOrInEden.link(&jit);
}
示例#4
0
static void osrWriteBarrier(CCallHelpers& jit, GPRReg owner, GPRReg scratch1, GPRReg scratch2)
{
    AssemblyHelpers::Jump definitelyNotMarked = jit.genericWriteBarrier(owner, scratch1, scratch2);

    // We need these extra slots because setupArgumentsWithExecState will use poke on x86.
#if CPU(X86)
    jit.subPtr(MacroAssembler::TrustedImm32(sizeof(void*) * 3), MacroAssembler::stackPointerRegister);
#endif

    jit.setupArgumentsWithExecState(owner);
    jit.move(MacroAssembler::TrustedImmPtr(reinterpret_cast<void*>(operationOSRWriteBarrier)), scratch1);
    jit.call(scratch1);

#if CPU(X86)
    jit.addPtr(MacroAssembler::TrustedImm32(sizeof(void*) * 3), MacroAssembler::stackPointerRegister);
#endif

    definitelyNotMarked.link(&jit);
}
示例#5
0
static void generateRegisterRestoration(AssemblyHelpers& jit)
{
#if ENABLE(FTL_JIT)
    RegisterSet toSave = registersToPreserve();
    ptrdiff_t offset = registerPreservationOffset();
    
    ASSERT(!toSave.get(GPRInfo::regT4));

    // We need to place the stack pointer back to where the caller thought they left it.
    // But also, in order to recover the registers, we need to figure out how big the
    // arguments area is.
    
    jit.load32(
        AssemblyHelpers::Address(
            AssemblyHelpers::stackPointerRegister,
            (JSStack::ArgumentCount - JSStack::CallerFrameAndPCSize) * sizeof(Register) + PayloadOffset),
        GPRInfo::regT4);
    
    jit.move(GPRInfo::regT4, GPRInfo::regT2);
    jit.lshift32(AssemblyHelpers::TrustedImm32(3), GPRInfo::regT2);
    
    jit.addPtr(AssemblyHelpers::TrustedImm32(offset), AssemblyHelpers::stackPointerRegister);
    jit.addPtr(AssemblyHelpers::stackPointerRegister, GPRInfo::regT2);
    
    // We saved things at:
    //
    //     adjSP + (JSStack::CallFrameHeaderSize - JSStack::CallerFrameAndPCSize + NumArgs) * 8
    //
    // Where:
    //
    //     adjSP = origSP - offset
    //
    // regT2 now points at:
    //
    //     origSP + NumArgs * 8
    //   = adjSP + offset + NumArgs * 8
    // 
    // So if we subtract offset and then add JSStack::CallFrameHeaderSize and subtract
    // JSStack::CallerFrameAndPCSize, we'll get the thing we want.
    ptrdiff_t currentOffset = -offset + sizeof(Register) * (
        JSStack::CallFrameHeaderSize - JSStack::CallerFrameAndPCSize);
    jit.loadPtr(AssemblyHelpers::Address(GPRInfo::regT2, currentOffset), GPRInfo::regT1);
    
    for (GPRReg gpr = AssemblyHelpers::firstRegister(); gpr <= AssemblyHelpers::lastRegister(); gpr = static_cast<GPRReg>(gpr + 1)) {
        if (!toSave.get(gpr))
            continue;
        currentOffset += sizeof(Register);
        jit.load64(AssemblyHelpers::Address(GPRInfo::regT2, currentOffset), gpr);
    }
    
    // Thunks like this rely on the ArgumentCount being intact. Pay it forward.
    jit.store32(
        GPRInfo::regT4,
        AssemblyHelpers::Address(
            AssemblyHelpers::stackPointerRegister,
            (JSStack::ArgumentCount - JSStack::CallerFrameAndPCSize) * sizeof(Register) + PayloadOffset));
    
    if (!ASSERT_DISABLED) {
        AssemblyHelpers::Jump ok = jit.branchPtr(
            AssemblyHelpers::Above, GPRInfo::regT1, AssemblyHelpers::TrustedImmPtr(static_cast<size_t>(0x1000)));
        jit.breakpoint();
        ok.link(&jit);
    }
    
    jit.jump(GPRInfo::regT1);
#else // ENABLE(FTL_JIT)
    UNUSED_PARAM(jit);
    UNREACHABLE_FOR_PLATFORM();
#endif // ENABLE(FTL_JIT)
}
void handleExitCounts(CCallHelpers& jit, const OSRExitBase& exit)
{
    jit.add32(AssemblyHelpers::TrustedImm32(1), AssemblyHelpers::AbsoluteAddress(&exit.m_count));

    jit.move(AssemblyHelpers::TrustedImmPtr(jit.codeBlock()), GPRInfo::regT0);

    AssemblyHelpers::Jump tooFewFails;

    jit.load32(AssemblyHelpers::Address(GPRInfo::regT0, CodeBlock::offsetOfOSRExitCounter()), GPRInfo::regT2);
    jit.add32(AssemblyHelpers::TrustedImm32(1), GPRInfo::regT2);
    jit.store32(GPRInfo::regT2, AssemblyHelpers::Address(GPRInfo::regT0, CodeBlock::offsetOfOSRExitCounter()));

    jit.move(AssemblyHelpers::TrustedImmPtr(jit.baselineCodeBlock()), GPRInfo::regT0);
    AssemblyHelpers::Jump reoptimizeNow = jit.branch32(
        AssemblyHelpers::GreaterThanOrEqual,
        AssemblyHelpers::Address(GPRInfo::regT0, CodeBlock::offsetOfJITExecuteCounter()),
        AssemblyHelpers::TrustedImm32(0));

    // We want to figure out if there's a possibility that we're in a loop. For the outermost
    // code block in the inline stack, we handle this appropriately by having the loop OSR trigger
    // check the exit count of the replacement of the CodeBlock from which we are OSRing. The
    // problem is the inlined functions, which might also have loops, but whose baseline versions
    // don't know where to look for the exit count. Figure out if those loops are severe enough
    // that we had tried to OSR enter. If so, then we should use the loop reoptimization trigger.
    // Otherwise, we should use the normal reoptimization trigger.

    AssemblyHelpers::JumpList loopThreshold;

    for (InlineCallFrame* inlineCallFrame = exit.m_codeOrigin.inlineCallFrame; inlineCallFrame; inlineCallFrame = inlineCallFrame->caller.inlineCallFrame) {
        loopThreshold.append(
            jit.branchTest8(
                AssemblyHelpers::NonZero,
                AssemblyHelpers::AbsoluteAddress(
                    inlineCallFrame->executable->addressOfDidTryToEnterInLoop())));
    }

    jit.move(
        AssemblyHelpers::TrustedImm32(jit.codeBlock()->exitCountThresholdForReoptimization()),
        GPRInfo::regT1);

    if (!loopThreshold.empty()) {
        AssemblyHelpers::Jump done = jit.jump();

        loopThreshold.link(&jit);
        jit.move(
            AssemblyHelpers::TrustedImm32(
                jit.codeBlock()->exitCountThresholdForReoptimizationFromLoop()),
            GPRInfo::regT1);

        done.link(&jit);
    }

    tooFewFails = jit.branch32(AssemblyHelpers::BelowOrEqual, GPRInfo::regT2, GPRInfo::regT1);

    reoptimizeNow.link(&jit);

    // Reoptimize as soon as possible.
#if !NUMBER_OF_ARGUMENT_REGISTERS
    jit.poke(GPRInfo::regT0);
    jit.poke(AssemblyHelpers::TrustedImmPtr(&exit), 1);
#else
    jit.move(GPRInfo::regT0, GPRInfo::argumentGPR0);
    jit.move(AssemblyHelpers::TrustedImmPtr(&exit), GPRInfo::argumentGPR1);
#endif
    jit.move(AssemblyHelpers::TrustedImmPtr(bitwise_cast<void*>(triggerReoptimizationNow)), GPRInfo::nonArgGPR0);
    jit.call(GPRInfo::nonArgGPR0);
    AssemblyHelpers::Jump doneAdjusting = jit.jump();

    tooFewFails.link(&jit);

    // Adjust the execution counter such that the target is to only optimize after a while.
    int32_t activeThreshold =
        jit.baselineCodeBlock()->adjustedCounterValue(
            Options::thresholdForOptimizeAfterLongWarmUp());
    int32_t targetValue = applyMemoryUsageHeuristicsAndConvertToInt(
        activeThreshold, jit.baselineCodeBlock());
    int32_t clippedValue;
    switch (jit.codeBlock()->jitType()) {
    case JITCode::DFGJIT:
        clippedValue = BaselineExecutionCounter::clippedThreshold(jit.codeBlock()->globalObject(), targetValue);
        break;
    case JITCode::FTLJIT:
        clippedValue = UpperTierExecutionCounter::clippedThreshold(jit.codeBlock()->globalObject(), targetValue);
        break;
    default:
        RELEASE_ASSERT_NOT_REACHED();
#if COMPILER_QUIRK(CONSIDERS_UNREACHABLE_CODE)
        clippedValue = 0; // Make some compilers, and mhahnenberg, happy.
#endif
        break;
    }
    jit.store32(AssemblyHelpers::TrustedImm32(-clippedValue), AssemblyHelpers::Address(GPRInfo::regT0, CodeBlock::offsetOfJITExecuteCounter()));
    jit.store32(AssemblyHelpers::TrustedImm32(activeThreshold), AssemblyHelpers::Address(GPRInfo::regT0, CodeBlock::offsetOfJITExecutionActiveThreshold()));
    jit.store32(AssemblyHelpers::TrustedImm32(formattedTotalExecutionCount(clippedValue)), AssemblyHelpers::Address(GPRInfo::regT0, CodeBlock::offsetOfJITExecutionTotalCount()));

    doneAdjusting.link(&jit);
}
void reifyInlinedCallFrames(CCallHelpers& jit, const OSRExitBase& exit)
{
    ASSERT(jit.baselineCodeBlock()->jitType() == JITCode::BaselineJIT);
    jit.storePtr(AssemblyHelpers::TrustedImmPtr(jit.baselineCodeBlock()), AssemblyHelpers::addressFor((VirtualRegister)JSStack::CodeBlock));

    CodeOrigin codeOrigin;
    for (codeOrigin = exit.m_codeOrigin; codeOrigin.inlineCallFrame; codeOrigin = codeOrigin.inlineCallFrame->caller) {
        InlineCallFrame* inlineCallFrame = codeOrigin.inlineCallFrame;
        CodeBlock* baselineCodeBlock = jit.baselineCodeBlockFor(codeOrigin);
        CodeBlock* baselineCodeBlockForCaller = jit.baselineCodeBlockFor(inlineCallFrame->caller);
        unsigned callBytecodeIndex = inlineCallFrame->caller.bytecodeIndex;
        CallLinkInfo& callLinkInfo = baselineCodeBlockForCaller->getCallLinkInfo(callBytecodeIndex);
        
        void* jumpTarget = callLinkInfo.callReturnLocation.executableAddress();

        GPRReg callerFrameGPR;
        if (inlineCallFrame->caller.inlineCallFrame) {
            jit.addPtr(AssemblyHelpers::TrustedImm32(inlineCallFrame->caller.inlineCallFrame->stackOffset * sizeof(EncodedJSValue)), GPRInfo::callFrameRegister, GPRInfo::regT3);
            callerFrameGPR = GPRInfo::regT3;
        } else
            callerFrameGPR = GPRInfo::callFrameRegister;
        
#if USE(JSVALUE64)
        jit.storePtr(AssemblyHelpers::TrustedImmPtr(baselineCodeBlock), AssemblyHelpers::addressFor((VirtualRegister)(inlineCallFrame->stackOffset + JSStack::CodeBlock)));
        if (!inlineCallFrame->isClosureCall)
            jit.store64(AssemblyHelpers::TrustedImm64(JSValue::encode(JSValue(inlineCallFrame->calleeConstant()->scope()))), AssemblyHelpers::addressFor((VirtualRegister)(inlineCallFrame->stackOffset + JSStack::ScopeChain)));
        jit.store64(callerFrameGPR, AssemblyHelpers::addressForByteOffset(inlineCallFrame->callerFrameOffset()));
        jit.storePtr(AssemblyHelpers::TrustedImmPtr(jumpTarget), AssemblyHelpers::addressForByteOffset(inlineCallFrame->returnPCOffset()));
        uint32_t locationBits = CallFrame::Location::encodeAsBytecodeOffset(codeOrigin.bytecodeIndex);
        jit.store32(AssemblyHelpers::TrustedImm32(locationBits), AssemblyHelpers::tagFor((VirtualRegister)(inlineCallFrame->stackOffset + JSStack::ArgumentCount)));
        jit.store32(AssemblyHelpers::TrustedImm32(inlineCallFrame->arguments.size()), AssemblyHelpers::payloadFor((VirtualRegister)(inlineCallFrame->stackOffset + JSStack::ArgumentCount)));
        if (!inlineCallFrame->isClosureCall)
            jit.store64(AssemblyHelpers::TrustedImm64(JSValue::encode(JSValue(inlineCallFrame->calleeConstant()))), AssemblyHelpers::addressFor((VirtualRegister)(inlineCallFrame->stackOffset + JSStack::Callee)));
        
        // Leave the captured arguments in regT3.
        if (baselineCodeBlock->usesArguments())
            jit.loadPtr(AssemblyHelpers::addressFor(VirtualRegister(inlineCallFrame->stackOffset + unmodifiedArgumentsRegister(baselineCodeBlock->argumentsRegister()).offset())), GPRInfo::regT3);
#else // USE(JSVALUE64) // so this is the 32-bit part
        jit.storePtr(AssemblyHelpers::TrustedImmPtr(baselineCodeBlock), AssemblyHelpers::addressFor((VirtualRegister)(inlineCallFrame->stackOffset + JSStack::CodeBlock)));
        jit.store32(AssemblyHelpers::TrustedImm32(JSValue::CellTag), AssemblyHelpers::tagFor((VirtualRegister)(inlineCallFrame->stackOffset + JSStack::ScopeChain)));
        if (!inlineCallFrame->isClosureCall)
            jit.storePtr(AssemblyHelpers::TrustedImmPtr(inlineCallFrame->calleeConstant()->scope()), AssemblyHelpers::payloadFor((VirtualRegister)(inlineCallFrame->stackOffset + JSStack::ScopeChain)));
        jit.storePtr(callerFrameGPR, AssemblyHelpers::addressForByteOffset(inlineCallFrame->callerFrameOffset()));
        jit.storePtr(AssemblyHelpers::TrustedImmPtr(jumpTarget), AssemblyHelpers::addressForByteOffset(inlineCallFrame->returnPCOffset()));
        Instruction* instruction = baselineCodeBlock->instructions().begin() + codeOrigin.bytecodeIndex;
        uint32_t locationBits = CallFrame::Location::encodeAsBytecodeInstruction(instruction);
        jit.store32(AssemblyHelpers::TrustedImm32(locationBits), AssemblyHelpers::tagFor((VirtualRegister)(inlineCallFrame->stackOffset + JSStack::ArgumentCount)));
        jit.store32(AssemblyHelpers::TrustedImm32(inlineCallFrame->arguments.size()), AssemblyHelpers::payloadFor((VirtualRegister)(inlineCallFrame->stackOffset + JSStack::ArgumentCount)));
        jit.store32(AssemblyHelpers::TrustedImm32(JSValue::CellTag), AssemblyHelpers::tagFor((VirtualRegister)(inlineCallFrame->stackOffset + JSStack::Callee)));
        if (!inlineCallFrame->isClosureCall)
            jit.storePtr(AssemblyHelpers::TrustedImmPtr(inlineCallFrame->calleeConstant()), AssemblyHelpers::payloadFor((VirtualRegister)(inlineCallFrame->stackOffset + JSStack::Callee)));

        // Leave the captured arguments in regT3.
        if (baselineCodeBlock->usesArguments())
            jit.loadPtr(AssemblyHelpers::payloadFor(VirtualRegister(inlineCallFrame->stackOffset + unmodifiedArgumentsRegister(baselineCodeBlock->argumentsRegister()).offset())), GPRInfo::regT3);
#endif // USE(JSVALUE64) // ending the #else part, so directly above is the 32-bit part
        
        if (baselineCodeBlock->usesArguments()) {
            AssemblyHelpers::Jump noArguments = jit.branchTestPtr(AssemblyHelpers::Zero, GPRInfo::regT3);
            jit.addPtr(AssemblyHelpers::TrustedImm32(inlineCallFrame->stackOffset * sizeof(EncodedJSValue)), GPRInfo::callFrameRegister, GPRInfo::regT0);
            jit.storePtr(GPRInfo::regT0, AssemblyHelpers::Address(GPRInfo::regT3, Arguments::offsetOfRegisters()));
            noArguments.link(&jit);
        }
    }

#if USE(JSVALUE64)
    uint32_t locationBits = CallFrame::Location::encodeAsBytecodeOffset(codeOrigin.bytecodeIndex);
#else
    Instruction* instruction = jit.baselineCodeBlock()->instructions().begin() + codeOrigin.bytecodeIndex;
    uint32_t locationBits = CallFrame::Location::encodeAsBytecodeInstruction(instruction);
#endif
    jit.store32(AssemblyHelpers::TrustedImm32(locationBits), AssemblyHelpers::tagFor((VirtualRegister)(JSStack::ArgumentCount)));
}