Auto merge of #108862 - Mark-Simulacrum:bootstrap-bump, r=pietroalbini

Bump bootstrap compiler to 1.69 beta

r? `@pietroalbini`

11 files changed, 47 insertions, 71 deletions

diff --git a/library/core/src/error.rs b/library/core/src/error.rs
index 571bc4bcfd1..11cb0827578 100644
--- a/library/core/src/error.rs
+++ b/library/core/src/error.rs
@@ -28,7 +28,7 @@ use crate::fmt::{Debug, Display};
 #[stable(feature = "rust1", since = "1.0.0")]
 #[cfg_attr(not(test), rustc_diagnostic_item = "Error")]
 #[rustc_has_incoherent_inherent_impls]
-#[cfg_attr(not(bootstrap), allow(multiple_supertrait_upcastable))]
+#[allow(multiple_supertrait_upcastable)]
 pub trait Error: Debug + Display {
     /// The lower-level source of this error, if any.
     ///
@@ -489,7 +489,7 @@ impl Error for crate::char::CharTryFromError {
 #[stable(feature = "duration_checked_float", since = "1.66.0")]
 impl Error for crate::time::TryFromFloatSecsError {}
 
-#[stable(feature = "cstr_from_bytes_until_nul", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "cstr_from_bytes_until_nul", since = "1.69.0")]
 impl Error for crate::ffi::FromBytesUntilNulError {}
 
 #[unstable(feature = "get_many_mut", issue = "104642")]
diff --git a/library/core/src/ffi/c_str.rs b/library/core/src/ffi/c_str.rs
index 87f077325f8..fe8abdf7fad 100644
--- a/library/core/src/ffi/c_str.rs
+++ b/library/core/src/ffi/c_str.rs
@@ -153,10 +153,10 @@ impl Error for FromBytesWithNulError {
 /// This error is created by the [`CStr::from_bytes_until_nul`] method.
 ///
 #[derive(Clone, PartialEq, Eq, Debug)]
-#[stable(feature = "cstr_from_bytes_until_nul", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "cstr_from_bytes_until_nul", since = "1.69.0")]
 pub struct FromBytesUntilNulError(());
 
-#[stable(feature = "cstr_from_bytes_until_nul", since = "CURRENT_RUSTC_VERSION")]
+#[stable(feature = "cstr_from_bytes_until_nul", since = "1.69.0")]
 impl fmt::Display for FromBytesUntilNulError {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(f, "data provided does not contain a nul")
@@ -324,8 +324,8 @@ impl CStr {
     /// ```
     ///
     #[rustc_allow_const_fn_unstable(const_slice_index)]
-    #[stable(feature = "cstr_from_bytes_until_nul", since = "CURRENT_RUSTC_VERSION")]
-    #[rustc_const_stable(feature = "cstr_from_bytes_until_nul", since = "CURRENT_RUSTC_VERSION")]
+    #[stable(feature = "cstr_from_bytes_until_nul", since = "1.69.0")]
+    #[rustc_const_stable(feature = "cstr_from_bytes_until_nul", since = "1.69.0")]
     pub const fn from_bytes_until_nul(bytes: &[u8]) -> Result<&CStr, FromBytesUntilNulError> {
         let nul_pos = memchr::memchr(0, bytes);
         match nul_pos {
diff --git a/library/core/src/fmt/mod.rs b/library/core/src/fmt/mod.rs
index 6d764237dc8..fcda097f01f 100644
--- a/library/core/src/fmt/mod.rs
+++ b/library/core/src/fmt/mod.rs
@@ -267,7 +267,7 @@ extern "C" {
 /// family of functions. It contains a function to format the given value. At
 /// compile time it is ensured that the function and the value have the correct
 /// types, and then this struct is used to canonicalize arguments to one type.
-#[cfg_attr(not(bootstrap), lang = "format_argument")]
+#[lang = "format_argument"]
 #[derive(Copy, Clone)]
 #[allow(missing_debug_implementations)]
 #[unstable(feature = "fmt_internals", reason = "internal to format_args!", issue = "none")]
@@ -280,7 +280,7 @@ pub struct ArgumentV1<'a> {
 /// This struct represents the unsafety of constructing an `Arguments`.
 /// It exists, rather than an unsafe function, in order to simplify the expansion
 /// of `format_args!(..)` and reduce the scope of the `unsafe` block.
-#[cfg_attr(not(bootstrap), lang = "format_unsafe_arg")]
+#[lang = "format_unsafe_arg"]
 #[allow(missing_debug_implementations)]
 #[doc(hidden)]
 #[unstable(feature = "fmt_internals", reason = "internal to format_args!", issue = "none")]
@@ -497,7 +497,7 @@ impl<'a> Arguments<'a> {
 /// ```
 ///
 /// [`format()`]: ../../std/fmt/fn.format.html
-#[cfg_attr(not(bootstrap), lang = "format_arguments")]
+#[lang = "format_arguments"]
 #[stable(feature = "rust1", since = "1.0.0")]
 #[derive(Copy, Clone)]
 pub struct Arguments<'a> {
diff --git a/library/core/src/fmt/rt/v1.rs b/library/core/src/fmt/rt/v1.rs
index 11a50951a75..6d70796f707 100644
--- a/library/core/src/fmt/rt/v1.rs
+++ b/library/core/src/fmt/rt/v1.rs
@@ -5,7 +5,7 @@
 //! these can be statically allocated and are slightly optimized for the runtime
 #![allow(missing_debug_implementations)]
 
-#[cfg_attr(not(bootstrap), lang = "format_placeholder")]
+#[lang = "format_placeholder"]
 #[derive(Copy, Clone)]
 // FIXME: Rename this to Placeholder
 pub struct Argument {
@@ -37,7 +37,7 @@ impl Argument {
 }
 
 /// Possible alignments that can be requested as part of a formatting directive.
-#[cfg_attr(not(bootstrap), lang = "format_alignment")]
+#[lang = "format_alignment"]
 #[derive(Copy, Clone, PartialEq, Eq)]
 pub enum Alignment {
     /// Indication that contents should be left-aligned.
@@ -51,7 +51,7 @@ pub enum Alignment {
 }
 
 /// Used by [width](https://doc.rust-lang.org/std/fmt/#width) and [precision](https://doc.rust-lang.org/std/fmt/#precision) specifiers.
-#[cfg_attr(not(bootstrap), lang = "format_count")]
+#[lang = "format_count"]
 #[derive(Copy, Clone)]
 pub enum Count {
     /// Specified with a literal number, stores the value
diff --git a/library/core/src/iter/mod.rs b/library/core/src/iter/mod.rs
index ae00232c12c..de638552fa3 100644
--- a/library/core/src/iter/mod.rs
+++ b/library/core/src/iter/mod.rs
@@ -278,7 +278,7 @@
 //!
 //! ```
 //! # #![allow(unused_must_use)]
-//! # #![cfg_attr(not(bootstrap), allow(map_unit_fn))]
+//! # #![allow(map_unit_fn)]
 //! let v = vec![1, 2, 3, 4, 5];
 //! v.iter().map(|x| println!("{x}"));
 //! ```
diff --git a/library/core/src/iter/traits/iterator.rs b/library/core/src/iter/traits/iterator.rs
index e791158e259..d48760ab3eb 100644
--- a/library/core/src/iter/traits/iterator.rs
+++ b/library/core/src/iter/traits/iterator.rs
@@ -69,7 +69,7 @@ fn _assert_is_object_safe(_: &dyn Iterator<Item = ()>) {}
 #[doc(notable_trait)]
 #[rustc_diagnostic_item = "Iterator"]
 #[must_use = "iterators are lazy and do nothing unless consumed"]
-#[cfg_attr(not(bootstrap), const_trait)]
+#[const_trait]
 pub trait Iterator {
     /// The type of the elements being iterated over.
     #[rustc_diagnostic_item = "IteratorItem"]
diff --git a/library/core/src/lib.rs b/library/core/src/lib.rs
index 24bad799fc8..526232f44ee 100644
--- a/library/core/src/lib.rs
+++ b/library/core/src/lib.rs
@@ -95,7 +95,7 @@
 #![warn(missing_docs)]
 #![allow(explicit_outlives_requirements)]
 #![allow(incomplete_features)]
-#![cfg_attr(not(bootstrap), warn(multiple_supertrait_upcastable))]
+#![warn(multiple_supertrait_upcastable)]
 //
 // Library features:
 #![feature(const_align_offset)]
@@ -241,7 +241,7 @@
 #![feature(unsized_fn_params)]
 #![feature(asm_const)]
 #![feature(const_transmute_copy)]
-#![cfg_attr(not(bootstrap), feature(multiple_supertrait_upcastable))]
+#![feature(multiple_supertrait_upcastable)]
 //
 // Target features:
 #![feature(arm_target_feature)]
@@ -254,7 +254,6 @@
 #![feature(sse4a_target_feature)]
 #![feature(tbm_target_feature)]
 #![feature(wasm_target_feature)]
-#![cfg_attr(bootstrap, feature(cmpxchg16b_target_feature))]
 
 // allow using `core::` in intra-doc links
 #[allow(unused_extern_crates)]
diff --git a/library/core/src/marker.rs b/library/core/src/marker.rs
index 427146941ad..9a0fd1f5f51 100644
--- a/library/core/src/marker.rs
+++ b/library/core/src/marker.rs
@@ -97,7 +97,7 @@ unsafe impl<T: Sync + ?Sized> Send for &T {}
 #[fundamental] // for Default, for example, which requires that `[T]: !Default` be evaluatable
 #[rustc_specialization_trait]
 #[rustc_deny_explicit_impl]
-#[cfg_attr(not(bootstrap), rustc_coinductive)]
+#[rustc_coinductive]
 pub trait Sized {
     // Empty.
 }
@@ -877,8 +877,7 @@ pub trait Tuple {}
 /// All types that have the same size and alignment as a `usize` or
 /// `*const ()` automatically implement this trait.
 #[unstable(feature = "pointer_like_trait", issue = "none")]
-#[cfg_attr(bootstrap, lang = "pointer_sized")]
-#[cfg_attr(not(bootstrap), lang = "pointer_like")]
+#[lang = "pointer_like"]
 #[rustc_on_unimplemented(
     message = "`{Self}` needs to have the same alignment and size as a pointer",
     label = "`{Self}` needs to be a pointer-like type"
diff --git a/library/core/src/net/socket_addr.rs b/library/core/src/net/socket_addr.rs
index 0d25ab1d5e1..2d48e271580 100644
--- a/library/core/src/net/socket_addr.rs
+++ b/library/core/src/net/socket_addr.rs
@@ -121,7 +121,7 @@ impl SocketAddr {
     /// ```
     #[stable(feature = "ip_addr", since = "1.7.0")]
     #[must_use]
-    #[rustc_const_stable(feature = "const_socketaddr", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "const_socketaddr", since = "1.69.0")]
     pub const fn new(ip: IpAddr, port: u16) -> SocketAddr {
         match ip {
             IpAddr::V4(a) => SocketAddr::V4(SocketAddrV4::new(a, port)),
@@ -141,7 +141,7 @@ impl SocketAddr {
     /// ```
     #[must_use]
     #[stable(feature = "ip_addr", since = "1.7.0")]
-    #[rustc_const_stable(feature = "const_socketaddr", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "const_socketaddr", since = "1.69.0")]
     pub const fn ip(&self) -> IpAddr {
         match *self {
             SocketAddr::V4(ref a) => IpAddr::V4(*a.ip()),
@@ -182,7 +182,7 @@ impl SocketAddr {
     /// ```
     #[must_use]
     #[stable(feature = "rust1", since = "1.0.0")]
-    #[rustc_const_stable(feature = "const_socketaddr", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "const_socketaddr", since = "1.69.0")]
     pub const fn port(&self) -> u16 {
         match *self {
             SocketAddr::V4(ref a) => a.port(),
@@ -226,7 +226,7 @@ impl SocketAddr {
     /// ```
     #[must_use]
     #[stable(feature = "sockaddr_checker", since = "1.16.0")]
-    #[rustc_const_stable(feature = "const_socketaddr", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "const_socketaddr", since = "1.69.0")]
     pub const fn is_ipv4(&self) -> bool {
         matches!(*self, SocketAddr::V4(_))
     }
@@ -248,7 +248,7 @@ impl SocketAddr {
     /// ```
     #[must_use]
     #[stable(feature = "sockaddr_checker", since = "1.16.0")]
-    #[rustc_const_stable(feature = "const_socketaddr", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "const_socketaddr", since = "1.69.0")]
     pub const fn is_ipv6(&self) -> bool {
         matches!(*self, SocketAddr::V6(_))
     }
@@ -268,7 +268,7 @@ impl SocketAddrV4 {
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
     #[must_use]
-    #[rustc_const_stable(feature = "const_socketaddr", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "const_socketaddr", since = "1.69.0")]
     pub const fn new(ip: Ipv4Addr, port: u16) -> SocketAddrV4 {
         SocketAddrV4 { ip, port }
     }
@@ -285,7 +285,7 @@ impl SocketAddrV4 {
     /// ```
     #[must_use]
     #[stable(feature = "rust1", since = "1.0.0")]
-    #[rustc_const_stable(feature = "const_socketaddr", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "const_socketaddr", since = "1.69.0")]
     pub const fn ip(&self) -> &Ipv4Addr {
         &self.ip
     }
@@ -318,7 +318,7 @@ impl SocketAddrV4 {
     /// ```
     #[must_use]
     #[stable(feature = "rust1", since = "1.0.0")]
-    #[rustc_const_stable(feature = "const_socketaddr", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "const_socketaddr", since = "1.69.0")]
     pub const fn port(&self) -> u16 {
         self.port
     }
@@ -359,7 +359,7 @@ impl SocketAddrV6 {
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
     #[must_use]
-    #[rustc_const_stable(feature = "const_socketaddr", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "const_socketaddr", since = "1.69.0")]
     pub const fn new(ip: Ipv6Addr, port: u16, flowinfo: u32, scope_id: u32) -> SocketAddrV6 {
         SocketAddrV6 { ip, port, flowinfo, scope_id }
     }
@@ -376,7 +376,7 @@ impl SocketAddrV6 {
     /// ```
     #[must_use]
     #[stable(feature = "rust1", since = "1.0.0")]
-    #[rustc_const_stable(feature = "const_socketaddr", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "const_socketaddr", since = "1.69.0")]
     pub const fn ip(&self) -> &Ipv6Addr {
         &self.ip
     }
@@ -409,7 +409,7 @@ impl SocketAddrV6 {
     /// ```
     #[must_use]
     #[stable(feature = "rust1", since = "1.0.0")]
-    #[rustc_const_stable(feature = "const_socketaddr", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "const_socketaddr", since = "1.69.0")]
     pub const fn port(&self) -> u16 {
         self.port
     }
@@ -452,7 +452,7 @@ impl SocketAddrV6 {
     /// ```
     #[must_use]
     #[stable(feature = "rust1", since = "1.0.0")]
-    #[rustc_const_stable(feature = "const_socketaddr", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "const_socketaddr", since = "1.69.0")]
     pub const fn flowinfo(&self) -> u32 {
         self.flowinfo
     }
@@ -492,7 +492,7 @@ impl SocketAddrV6 {
     /// ```
     #[must_use]
     #[stable(feature = "rust1", since = "1.0.0")]
-    #[rustc_const_stable(feature = "const_socketaddr", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "const_socketaddr", since = "1.69.0")]
     pub const fn scope_id(&self) -> u32 {
         self.scope_id
     }
diff --git a/library/core/src/ops/try_trait.rs b/library/core/src/ops/try_trait.rs
index 86aa1e4fd20..c254803fbf6 100644
--- a/library/core/src/ops/try_trait.rs
+++ b/library/core/src/ops/try_trait.rs
@@ -392,14 +392,7 @@ impl<T> NeverShortCircuit<T> {
     pub fn wrap_mut_2<A, B>(
         mut f: impl ~const FnMut(A, B) -> T,
     ) -> impl ~const FnMut(A, B) -> Self {
-        cfg_if! {
-            if #[cfg(bootstrap)] {
-                #[allow(unused_parens)]
-                (const move |a, b| NeverShortCircuit(f(a, b)))
-            } else {
-                const move |a, b| NeverShortCircuit(f(a, b))
-            }
-        }
+        const move |a, b| NeverShortCircuit(f(a, b))
     }
 }
 
diff --git a/library/core/src/sync/atomic.rs b/library/core/src/sync/atomic.rs
index 123561873a6..2f6b1c74da0 100644
--- a/library/core/src/sync/atomic.rs
+++ b/library/core/src/sync/atomic.rs
@@ -1951,8 +1951,7 @@ macro_rules! if_not_8_bit {
     ($_:ident, $($tt:tt)*) => { $($tt)* };
 }
 
-#[cfg_attr(not(bootstrap), cfg(target_has_atomic_load_store))]
-#[cfg_attr(bootstrap, cfg(target_has_atomic_load_store = "8"))]
+#[cfg(target_has_atomic_load_store)]
 macro_rules! atomic_int {
     ($cfg_cas:meta,
      $cfg_align:meta,
@@ -3125,8 +3124,7 @@ atomic_int_ptr_sized! {
 }
 
 #[inline]
-#[cfg_attr(not(bootstrap), cfg(target_has_atomic))]
-#[cfg_attr(bootstrap, cfg(target_has_atomic = "8"))]
+#[cfg(target_has_atomic)]
 fn strongest_failure_ordering(order: Ordering) -> Ordering {
     match order {
         Release => Relaxed,
@@ -3168,8 +3166,7 @@ unsafe fn atomic_load<T: Copy>(dst: *const T, order: Ordering) -> T {
 }
 
 #[inline]
-#[cfg_attr(not(bootstrap), cfg(target_has_atomic))]
-#[cfg_attr(bootstrap, cfg(target_has_atomic = "8"))]
+#[cfg(target_has_atomic)]
 #[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
 unsafe fn atomic_swap<T: Copy>(dst: *mut T, val: T, order: Ordering) -> T {
     // SAFETY: the caller must uphold the safety contract for `atomic_swap`.
@@ -3186,8 +3183,7 @@ unsafe fn atomic_swap<T: Copy>(dst: *mut T, val: T, order: Ordering) -> T {
 
 /// Returns the previous value (like __sync_fetch_and_add).
 #[inline]
-#[cfg_attr(not(bootstrap), cfg(target_has_atomic))]
-#[cfg_attr(bootstrap, cfg(target_has_atomic = "8"))]
+#[cfg(target_has_atomic)]
 #[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
 unsafe fn atomic_add<T: Copy>(dst: *mut T, val: T, order: Ordering) -> T {
     // SAFETY: the caller must uphold the safety contract for `atomic_add`.
@@ -3204,8 +3200,7 @@ unsafe fn atomic_add<T: Copy>(dst: *mut T, val: T, order: Ordering) -> T {
 
 /// Returns the previous value (like __sync_fetch_and_sub).
 #[inline]
-#[cfg_attr(not(bootstrap), cfg(target_has_atomic))]
-#[cfg_attr(bootstrap, cfg(target_has_atomic = "8"))]
+#[cfg(target_has_atomic)]
 #[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
 unsafe fn atomic_sub<T: Copy>(dst: *mut T, val: T, order: Ordering) -> T {
     // SAFETY: the caller must uphold the safety contract for `atomic_sub`.
@@ -3221,8 +3216,7 @@ unsafe fn atomic_sub<T: Copy>(dst: *mut T, val: T, order: Ordering) -> T {
 }
 
 #[inline]
-#[cfg_attr(not(bootstrap), cfg(target_has_atomic))]
-#[cfg_attr(bootstrap, cfg(target_has_atomic = "8"))]
+#[cfg(target_has_atomic)]
 #[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
 unsafe fn atomic_compare_exchange<T: Copy>(
     dst: *mut T,
@@ -3257,8 +3251,7 @@ unsafe fn atomic_compare_exchange<T: Copy>(
 }
 
 #[inline]
-#[cfg_attr(not(bootstrap), cfg(target_has_atomic))]
-#[cfg_attr(bootstrap, cfg(target_has_atomic = "8"))]
+#[cfg(target_has_atomic)]
 #[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
 unsafe fn atomic_compare_exchange_weak<T: Copy>(
     dst: *mut T,
@@ -3293,8 +3286,7 @@ unsafe fn atomic_compare_exchange_weak<T: Copy>(
 }
 
 #[inline]
-#[cfg_attr(not(bootstrap), cfg(target_has_atomic))]
-#[cfg_attr(bootstrap, cfg(target_has_atomic = "8"))]
+#[cfg(target_has_atomic)]
 #[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
 unsafe fn atomic_and<T: Copy>(dst: *mut T, val: T, order: Ordering) -> T {
     // SAFETY: the caller must uphold the safety contract for `atomic_and`
@@ -3310,8 +3302,7 @@ unsafe fn atomic_and<T: Copy>(dst: *mut T, val: T, order: Ordering) -> T {
 }
 
 #[inline]
-#[cfg_attr(not(bootstrap), cfg(target_has_atomic))]
-#[cfg_attr(bootstrap, cfg(target_has_atomic = "8"))]
+#[cfg(target_has_atomic)]
 #[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
 unsafe fn atomic_nand<T: Copy>(dst: *mut T, val: T, order: Ordering) -> T {
     // SAFETY: the caller must uphold the safety contract for `atomic_nand`
@@ -3327,8 +3318,7 @@ unsafe fn atomic_nand<T: Copy>(dst: *mut T, val: T, order: Ordering) -> T {
 }
 
 #[inline]
-#[cfg_attr(not(bootstrap), cfg(target_has_atomic))]
-#[cfg_attr(bootstrap, cfg(target_has_atomic = "8"))]
+#[cfg(target_has_atomic)]
 #[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
 unsafe fn atomic_or<T: Copy>(dst: *mut T, val: T, order: Ordering) -> T {
     // SAFETY: the caller must uphold the safety contract for `atomic_or`
@@ -3344,8 +3334,7 @@ unsafe fn atomic_or<T: Copy>(dst: *mut T, val: T, order: Ordering) -> T {
 }
 
 #[inline]
-#[cfg_attr(not(bootstrap), cfg(target_has_atomic))]
-#[cfg_attr(bootstrap, cfg(target_has_atomic = "8"))]
+#[cfg(target_has_atomic)]
 #[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
 unsafe fn atomic_xor<T: Copy>(dst: *mut T, val: T, order: Ordering) -> T {
     // SAFETY: the caller must uphold the safety contract for `atomic_xor`
@@ -3362,8 +3351,7 @@ unsafe fn atomic_xor<T: Copy>(dst: *mut T, val: T, order: Ordering) -> T {
 
 /// returns the max value (signed comparison)
 #[inline]
-#[cfg_attr(not(bootstrap), cfg(target_has_atomic))]
-#[cfg_attr(bootstrap, cfg(target_has_atomic = "8"))]
+#[cfg(target_has_atomic)]
 #[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
 unsafe fn atomic_max<T: Copy>(dst: *mut T, val: T, order: Ordering) -> T {
     // SAFETY: the caller must uphold the safety contract for `atomic_max`
@@ -3380,8 +3368,7 @@ unsafe fn atomic_max<T: Copy>(dst: *mut T, val: T, order: Ordering) -> T {
 
 /// returns the min value (signed comparison)
 #[inline]
-#[cfg_attr(not(bootstrap), cfg(target_has_atomic))]
-#[cfg_attr(bootstrap, cfg(target_has_atomic = "8"))]
+#[cfg(target_has_atomic)]
 #[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
 unsafe fn atomic_min<T: Copy>(dst: *mut T, val: T, order: Ordering) -> T {
     // SAFETY: the caller must uphold the safety contract for `atomic_min`
@@ -3398,8 +3385,7 @@ unsafe fn atomic_min<T: Copy>(dst: *mut T, val: T, order: Ordering) -> T {
 
 /// returns the max value (unsigned comparison)
 #[inline]
-#[cfg_attr(not(bootstrap), cfg(target_has_atomic))]
-#[cfg_attr(bootstrap, cfg(target_has_atomic = "8"))]
+#[cfg(target_has_atomic)]
 #[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
 unsafe fn atomic_umax<T: Copy>(dst: *mut T, val: T, order: Ordering) -> T {
     // SAFETY: the caller must uphold the safety contract for `atomic_umax`
@@ -3416,8 +3402,7 @@ unsafe fn atomic_umax<T: Copy>(dst: *mut T, val: T, order: Ordering) -> T {
 
 /// returns the min value (unsigned comparison)
 #[inline]
-#[cfg_attr(not(bootstrap), cfg(target_has_atomic))]
-#[cfg_attr(bootstrap, cfg(target_has_atomic = "8"))]
+#[cfg(target_has_atomic)]
 #[cfg_attr(miri, track_caller)] // even without panics, this helps for Miri backtraces
 unsafe fn atomic_umin<T: Copy>(dst: *mut T, val: T, order: Ordering) -> T {
     // SAFETY: the caller must uphold the safety contract for `atomic_umin`