Rollup merge of rust-lang#127071 - Sky9x:remove-ptr-to-from-bits, r=scottmcm

Remove (deprecated & unstable) {to,from}_bits pointer methods

These unstable methods have been deprecated for more than a year (since rust-lang#95583). Remove them.

See rust-lang#91126 (comment) and https://github.com/rust-lang/rust/pull/110441/files#r1169574509.

Closes rust-lang#91126.

r? `@scottmcm`

Author: matthiaskrgr

core/src/ptr/const_ptr.rs

@@ -112,71 +112,6 @@ impl<T: ?Sized> *const T {
         self as _
     }
 
-    /// Casts a pointer to its raw bits.
-    ///
-    /// This is equivalent to `as usize`, but is more specific to enhance readability.
-    /// The inverse method is [`from_bits`](#method.from_bits).
-    ///
-    /// In particular, `*p as usize` and `p as usize` will both compile for
-    /// pointers to numeric types but do very different things, so using this
-    /// helps emphasize that reading the bits was intentional.
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// #![feature(ptr_to_from_bits)]
-    /// # #[cfg(not(miri))] { // doctest does not work with strict provenance
-    /// let array = [13, 42];
-    /// let p0: *const i32 = &array[0];
-    /// assert_eq!(<*const _>::from_bits(p0.to_bits()), p0);
-    /// let p1: *const i32 = &array[1];
-    /// assert_eq!(p1.to_bits() - p0.to_bits(), 4);
-    /// # }
-    /// ```
-    #[unstable(feature = "ptr_to_from_bits", issue = "91126")]
-    #[deprecated(
-        since = "1.67.0",
-        note = "replaced by the `expose_provenance` method, or update your code \
-            to follow the strict provenance rules using its APIs"
-    )]
-    #[inline(always)]
-    pub fn to_bits(self) -> usize
-    where
-        T: Sized,
-    {
-        self as usize
-    }
-
-    /// Creates a pointer from its raw bits.
-    ///
-    /// This is equivalent to `as *const T`, but is more specific to enhance readability.
-    /// The inverse method is [`to_bits`](#method.to_bits).
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// #![feature(ptr_to_from_bits)]
-    /// # #[cfg(not(miri))] { // doctest does not work with strict provenance
-    /// use std::ptr::NonNull;
-    /// let dangling: *const u8 = NonNull::dangling().as_ptr();
-    /// assert_eq!(<*const u8>::from_bits(1), dangling);
-    /// # }
-    /// ```
-    #[unstable(feature = "ptr_to_from_bits", issue = "91126")]
-    #[deprecated(
-        since = "1.67.0",
-        note = "replaced by the `ptr::with_exposed_provenance` function, or update \
-            your code to follow the strict provenance rules using its APIs"
-    )]
-    #[allow(fuzzy_provenance_casts)] // this is an unstable and semi-deprecated cast function
-    #[inline(always)]
-    pub fn from_bits(bits: usize) -> Self
-    where
-        T: Sized,
-    {
-        bits as Self
-    }
-
     /// Gets the "address" portion of the pointer.
     ///
     /// This is similar to `self as usize`, which semantically discards *provenance* and

core/src/ptr/mut_ptr.rs

@@ -117,72 +117,6 @@ impl<T: ?Sized> *mut T {
         self as _
     }
 
-    /// Casts a pointer to its raw bits.
-    ///
-    /// This is equivalent to `as usize`, but is more specific to enhance readability.
-    /// The inverse method is [`from_bits`](pointer#method.from_bits-1).
-    ///
-    /// In particular, `*p as usize` and `p as usize` will both compile for
-    /// pointers to numeric types but do very different things, so using this
-    /// helps emphasize that reading the bits was intentional.
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// #![feature(ptr_to_from_bits)]
-    /// # #[cfg(not(miri))] { // doctest does not work with strict provenance
-    /// let mut array = [13, 42];
-    /// let mut it = array.iter_mut();
-    /// let p0: *mut i32 = it.next().unwrap();
-    /// assert_eq!(<*mut _>::from_bits(p0.to_bits()), p0);
-    /// let p1: *mut i32 = it.next().unwrap();
-    /// assert_eq!(p1.to_bits() - p0.to_bits(), 4);
-    /// }
-    /// ```
-    #[unstable(feature = "ptr_to_from_bits", issue = "91126")]
-    #[deprecated(
-        since = "1.67.0",
-        note = "replaced by the `expose_provenance` method, or update your code \
-            to follow the strict provenance rules using its APIs"
-    )]
-    #[inline(always)]
-    pub fn to_bits(self) -> usize
-    where
-        T: Sized,
-    {
-        self as usize
-    }
-
-    /// Creates a pointer from its raw bits.
-    ///
-    /// This is equivalent to `as *mut T`, but is more specific to enhance readability.
-    /// The inverse method is [`to_bits`](pointer#method.to_bits-1).
-    ///
-    /// # Examples
-    ///
-    /// ```
-    /// #![feature(ptr_to_from_bits)]
-    /// # #[cfg(not(miri))] { // doctest does not work with strict provenance
-    /// use std::ptr::NonNull;
-    /// let dangling: *mut u8 = NonNull::dangling().as_ptr();
-    /// assert_eq!(<*mut u8>::from_bits(1), dangling);
-    /// }
-    /// ```
-    #[unstable(feature = "ptr_to_from_bits", issue = "91126")]
-    #[deprecated(
-        since = "1.67.0",
-        note = "replaced by the `ptr::with_exposed_provenance_mut` function, or \
-            update your code to follow the strict provenance rules using its APIs"
-    )]
-    #[allow(fuzzy_provenance_casts)] // this is an unstable and semi-deprecated cast function
-    #[inline(always)]
-    pub fn from_bits(bits: usize) -> Self
-    where
-        T: Sized,
-    {
-        bits as Self
-    }
-
     /// Gets the "address" portion of the pointer.
     ///
     /// This is similar to `self as usize`, which semantically discards *provenance* and