示例#1
0
JSObject *
BaselineInspector::commonSetPropFunction(jsbytecode *pc, Shape **lastProperty, JSFunction **commonSetter)
{
    if (!hasBaselineScript())
        return nullptr;

    const ICEntry &entry = icEntryFromPC(pc);
    JSObject *holder = nullptr;
    Shape *holderShape = nullptr;
    JSFunction *setter = nullptr;
    for (ICStub *stub = entry.firstStub(); stub; stub = stub->next()) {
        if (stub->isSetProp_CallScripted() || stub->isSetProp_CallNative()) {
            ICSetPropCallSetter *nstub = static_cast<ICSetPropCallSetter *>(stub);
            if (!holder) {
                holder = nstub->holder();
                holderShape = nstub->holderShape();
                setter = nstub->setter();
            } else if (nstub->holderShape() != holderShape) {
                return nullptr;
            } else {
                MOZ_ASSERT(setter == nstub->setter());
            }
        } else if (stub->isSetProp_Fallback() &&
                   stub->toSetProp_Fallback()->hadUnoptimizableAccess())
        {
            // We have an unoptimizable access, so don't try to optimize.
            return nullptr;
        }
    }
    *lastProperty = holderShape;
    *commonSetter = setter;
    return holder;
}
JSObject *
BaselineInspector::commonSetPropFunction(jsbytecode *pc, Shape **lastProperty, JSFunction **commonSetter)
{
    const ICEntry &entry = icEntryFromPC(pc);
    for (ICStub *stub = entry.firstStub(); stub; stub = stub->next()) {
        if (stub->isSetProp_CallScripted() || stub->isSetProp_CallNative()) {
            ICSetPropCallSetter *nstub = static_cast<ICSetPropCallSetter *>(stub);
            *lastProperty = nstub->holderShape();
            *commonSetter = nstub->setter();
            return nstub->holder();
        }
    }
    return nullptr;
}
示例#3
0
bool
BaselineInspector::commonSetPropFunction(jsbytecode* pc, JSObject** holder, Shape** holderShape,
                                         JSFunction** commonSetter, bool* isOwnProperty,
                                         ReceiverVector& receivers,
                                         ObjectGroupVector& convertUnboxedGroups)
{
    if (!hasBaselineScript())
        return false;

    MOZ_ASSERT(receivers.empty());
    MOZ_ASSERT(convertUnboxedGroups.empty());

    *holder = nullptr;
    const ICEntry& entry = icEntryFromPC(pc);

    for (ICStub* stub = entry.firstStub(); stub; stub = stub->next()) {
        if (stub->isSetProp_CallScripted() || stub->isSetProp_CallNative()) {
            ICSetPropCallSetter* nstub = static_cast<ICSetPropCallSetter*>(stub);
            bool isOwn = nstub->isOwnSetter();
            if (!isOwn && !AddReceiver(nstub->receiverGuard(), receivers, convertUnboxedGroups))
                return false;

            if (!*holder) {
                *holder = nstub->holder();
                *holderShape = nstub->holderShape();
                *commonSetter = nstub->setter();
                *isOwnProperty = isOwn;
            } else if (nstub->holderShape() != *holderShape || isOwn != *isOwnProperty) {
                return false;
            } else {
                MOZ_ASSERT(*commonSetter == nstub->setter());
            }
        } else if (!stub->isSetProp_Fallback() ||
                   stub->toSetProp_Fallback()->hadUnoptimizableAccess())
        {
            // We have an unoptimizable access, so don't try to optimize.
            return false;
        }
    }

    if (!*holder)
        return false;

    return true;
}