hashbrown/util.rs
1// FIXME: Branch prediction hint. This is currently only available on nightly
2// but it consistently improves performance by 10-15%.
3#[cfg(not(feature = "nightly"))]
4pub(crate) use core::convert::{identity as likely, identity as unlikely};
5#[cfg(feature = "nightly")]
6pub(crate) use core::intrinsics::{likely, unlikely};
7
8// FIXME: use strict provenance functions once they are stable.
9// Implement it with a transmute for now.
10#[inline(always)]
11#[allow(clippy::useless_transmute)] // clippy is wrong, cast and transmute are different here
12pub(crate) fn invalid_mut<T>(addr: usize) -> *mut T {
13 unsafe { core::mem::transmute(addr) }
14}