#[inline(never)] does not work for async functions

I would expect the following code produced a Future::poll() impl with the noinline attribute.

#![feature(noop_waker)]

use std::task::{Context, Waker, Poll};
use std::future::Future;

#[inline(never)]
pub async fn foo() -> u32 {
    std::hint::black_box(1)
}

pub fn bar() -> Poll<u32> {
    let f = std::pin::pin!(foo());
    f.poll(&mut Context::from_waker(Waker::noop()))
}

Instead, the poll method has inlinehint applied to it and gets inlined accordingly:

; This is the function creating the async fn obj:
; Function Attrs: noinline nonlazybind uwtable
define i8 @_RNvCs8Nh0J9OTdDr_15async_fn_inline3foo() unnamed_addr #2 {
  %1 = alloca [1 x i8], align 1
  store i8 0, ptr %1, align 1
  %2 = load i8, ptr %1, align 1
  ret i8 %2
}

; This the poll method:
; Function Attrs: inlinehint nonlazybind uwtable <== this should arguably be noinline too
define internal { i32, i32 } @_RNCNvCs8Nh0J9OTdDr_15async_fn_inline3foo0B3_(...)

Meta

rustc --version --verbose:

rustc 1.82.0-nightly (636d7ff91 2024-08-19)
binary: rustc
commit-hash: 636d7ff91b9847d6d43c7bbe023568828f6e3246
commit-date: 2024-08-19
host: x86_64-unknown-linux-gnu
release: 1.82.0-nightly
LLVM version: 19.1.0

Start with the linked Godbolt reproducer and inspect the generated LLVM for the async function's Future::poll implementation. Trace how #[inline(never)] on foo is translated to that poll entry point; done means the poll method preserves the noinline attribute instead of inlinehint and inlining.