What are the [[msvc::intrinsic]] properties of C++ msvc?

Question

When I was using visual studio 2022, I noticed that its std::move function defines the [[msvc::intrinsic]] attribute as a macro. /std:c++latest produces some non-standard behavior

That is, the lifetime of the temporary object is extended, but in principle, the move function call has a return, can not be extended.

I tried the toggle option standard, but it was the same.

Here's a demo I wrote, replacing std::move with my own mmove, adding [[msvc::intrinsic]] attributes, and a normal control group.

I want to know what this property does and why msvc is designed this way.

#include<iostream>

struct A{
    ~A() { puts(__FUNCTION__); }
};

template <class Ty>//Added an attribute, behavior equivalent to std::move in /std:c++latest, non-standard, extended lifetime
[[msvc::intrinsic]] constexpr std::remove_reference_t<Ty>&& mmove(Ty&& Arg) noexcept {
    return static_cast<std::remove_reference_t<Ty>&&>(Arg);
}

template <class Ty>
constexpr std::remove_reference_t<Ty>&& nmove(Ty&& Arg) noexcept {
    return static_cast<std::remove_reference_t<Ty>&&>(Arg);
}


int main()
{
    {
        A&& rvalue = mmove(A{});
        puts(__FUNCTION__);
    }
    puts("------");
    {
        A&& rvalue = nmove(A{});
        puts(__FUNCTION__);
    }
}

enter image description here

I look forward to getting a detailed explanation of the '[[msvc::intrinsic]]' properties.