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ub_checks intrinsics: fall back to cfg(ub_checks)
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RalfJung committed Aug 25, 2024
1 parent edbc000 commit f836ff0
Showing 1 changed file with 2 additions and 2 deletions.
4 changes: 2 additions & 2 deletions library/core/src/intrinsics.rs
Original file line number Diff line number Diff line change
Expand Up @@ -2949,15 +2949,15 @@ pub const unsafe fn typed_swap<T>(x: *mut T, y: *mut T) {
/// sysroot which is built without ub_checks but with `#[rustc_preserve_ub_checks]`.
/// For code that gets monomorphized in the user crate (i.e., generic functions and functions with
/// `#[inline]`), gating assertions on `ub_checks()` rather than `cfg!(ub_checks)` means that
/// assertions are enabled whenever the *user crate* has UB checks enabled. However if the
/// assertions are enabled whenever the *user crate* has UB checks enabled. However, if the
/// user has UB checks disabled, the checks will still get optimized out. This intrinsic is
/// primarily used by [`ub_checks::assert_unsafe_precondition`].
#[rustc_const_unstable(feature = "const_ub_checks", issue = "none")]
#[unstable(feature = "core_intrinsics", issue = "none")]
#[inline(always)]
#[rustc_intrinsic]
pub const fn ub_checks() -> bool {
cfg!(debug_assertions)
cfg!(ub_checks)
}

/// Allocates a block of memory at compile time.
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