C++ (Cpp) CacheIRWriter::loadArgumentsObjectLengthResultの例

コード例 #1

ファイル: CacheIR.cpp プロジェクト: MekliCZ/positron

bool
GetPropIRGenerator::tryAttachObjectLength(CacheIRWriter& writer, HandleObject obj, ObjOperandId objId)
{
    MOZ_ASSERT(!emitted_);

    if (name_ != cx_->names().length)
        return true;

    if (obj->is<ArrayObject>()) {
        // Make sure int32 is added to the TypeSet before we attach a stub, so
        // the stub can return int32 values without monitoring the result.
        if (obj->as<ArrayObject>().length() > INT32_MAX)
            return true;

        writer.guardClass(objId, GuardClassKind::Array);
        writer.loadInt32ArrayLengthResult(objId);
        emitted_ = true;
        return true;
    }

    if (obj->is<UnboxedArrayObject>()) {
        writer.guardClass(objId, GuardClassKind::UnboxedArray);
        writer.loadUnboxedArrayLengthResult(objId);
        emitted_ = true;
        return true;
    }

    if (obj->is<ArgumentsObject>() && !obj->as<ArgumentsObject>().hasOverriddenLength()) {
        if (obj->is<MappedArgumentsObject>()) {
            writer.guardClass(objId, GuardClassKind::MappedArguments);
        } else {
            MOZ_ASSERT(obj->is<UnmappedArgumentsObject>());
            writer.guardClass(objId, GuardClassKind::UnmappedArguments);
        }
        writer.loadArgumentsObjectLengthResult(objId);
        emitted_ = true;
        return true;
    }

    return true;
}