Make sure the implementation of TcpStream::as_raw_fd is fully inlined

[KamilaBorowska]

Currently the following function:

use std::os::fd::{AsRawFd, RawFd};
use std::net::TcpStream;

pub fn as_raw_fd(socket: &TcpStream) -> RawFd {
    socket.as_raw_fd()
}

Is optimized to the following:

example::as_raw_fd:
        push    rax
        call    qword ptr [rip + <std::net::tcp::TcpStream as std::sys_common::AsInner<std::sys_common::net::TcpStream>>::as_inner@GOTPCREL]
        mov     rdi, rax
        call    qword ptr [rip + std::sys_common::net::TcpStream::socket@GOTPCREL]
        mov     rdi, rax
        pop     rax
        jmp     qword ptr [rip + _ZN73_$LT$std..sys..unix..net..Socket$u20$as$u20$std..os..fd..raw..AsRawFd$GT$9as_raw_fd17h633bcf7e481df8bbE@GOTPCREL]

I think it would make more sense to inline trivial functions used within TcpStream::AsRawFd.

[rustbot]

r? @m-ou-se

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[m-ou-se]

@bors r+

[bors]

📌 Commit 500a8e1 has been approved by m-ou-se

It is now in the queue for this repository.