stabilize ptr.is_aligned, move ptr.is_aligned_to to a new feature gate

This is an alternative to #121920

13 files changed, 30 insertions, 51 deletions

diff --git a/compiler/rustc_codegen_gcc/patches/libgccjit12/0001-core-Disable-portable-simd-test.patch b/compiler/rustc_codegen_gcc/patches/libgccjit12/0001-core-Disable-portable-simd-test.patch
index 914ae986b50..36d0789d2a2 100644
--- a/compiler/rustc_codegen_gcc/patches/libgccjit12/0001-core-Disable-portable-simd-test.patch
+++ b/compiler/rustc_codegen_gcc/patches/libgccjit12/0001-core-Disable-portable-simd-test.patch
@@ -14,7 +14,7 @@ index d0a119c..76fdece 100644
 @@ -89,7 +89,6 @@
  #![feature(never_type)]
  #![feature(unwrap_infallible)]
- #![feature(pointer_is_aligned)]
+ #![feature(pointer_is_aligned_to)]
 -#![feature(portable_simd)]
  #![feature(ptr_metadata)]
  #![feature(lazy_cell)]
@@ -27,6 +27,6 @@ index d0a119c..76fdece 100644
  mod slice;
  mod str;
  mod str_lossy;
--- 
+--
 2.42.1
 
diff --git a/library/alloc/src/lib.rs b/library/alloc/src/lib.rs
index b6a9d6005d4..cafd59cb0d9 100644
--- a/library/alloc/src/lib.rs
+++ b/library/alloc/src/lib.rs
@@ -198,7 +198,6 @@
 #![feature(multiple_supertrait_upcastable)]
 #![feature(negative_impls)]
 #![feature(never_type)]
-#![feature(pointer_is_aligned)]
 #![feature(rustc_allow_const_fn_unstable)]
 #![feature(rustc_attrs)]
 #![feature(slice_internals)]
diff --git a/library/alloc/tests/lib.rs b/library/alloc/tests/lib.rs
index 04709af5c0a..a34bce66496 100644
--- a/library/alloc/tests/lib.rs
+++ b/library/alloc/tests/lib.rs
@@ -37,7 +37,7 @@
 #![feature(const_trait_impl)]
 #![feature(const_str_from_utf8)]
 #![feature(panic_update_hook)]
-#![feature(pointer_is_aligned)]
+#![feature(pointer_is_aligned_to)]
 #![feature(slice_flatten)]
 #![feature(thin_box)]
 #![feature(strict_provenance)]
diff --git a/library/core/src/ptr/const_ptr.rs b/library/core/src/ptr/const_ptr.rs
index 68ce80ee321..99bd631b581 100644
--- a/library/core/src/ptr/const_ptr.rs
+++ b/library/core/src/ptr/const_ptr.rs
@@ -1401,8 +1401,6 @@ impl<T: ?Sized> *const T {
     /// # Examples
     ///
     /// ```
-    /// #![feature(pointer_is_aligned)]
-    ///
     /// // On some platforms, the alignment of i32 is less than 4.
     /// #[repr(align(4))]
     /// struct AlignedI32(i32);
@@ -1425,7 +1423,6 @@ impl<T: ?Sized> *const T {
     /// underlying allocation.
     ///
     /// ```
-    /// #![feature(pointer_is_aligned)]
     /// #![feature(const_pointer_is_aligned)]
     ///
     /// // On some platforms, the alignment of primitives is less than their size.
@@ -1451,7 +1448,6 @@ impl<T: ?Sized> *const T {
     /// pointer is aligned, even if the compiletime pointer wasn't aligned.
     ///
     /// ```
-    /// #![feature(pointer_is_aligned)]
     /// #![feature(const_pointer_is_aligned)]
     ///
     /// // On some platforms, the alignment of primitives is less than their size.
@@ -1477,7 +1473,6 @@ impl<T: ?Sized> *const T {
     /// runtime and compiletime.
     ///
     /// ```
-    /// #![feature(pointer_is_aligned)]
     /// #![feature(const_pointer_is_aligned)]
     ///
     /// // On some platforms, the alignment of primitives is less than their size.
@@ -1501,7 +1496,7 @@ impl<T: ?Sized> *const T {
     /// [tracking issue]: https://github.com/rust-lang/rust/issues/104203
     #[must_use]
     #[inline]
-    #[unstable(feature = "pointer_is_aligned", issue = "96284")]
+    #[stable(feature = "pointer_is_aligned", since = "CURRENT_RUSTC_VERSION")]
     #[rustc_const_unstable(feature = "const_pointer_is_aligned", issue = "104203")]
     pub const fn is_aligned(self) -> bool
     where
@@ -1522,7 +1517,7 @@ impl<T: ?Sized> *const T {
     /// # Examples
     ///
     /// ```
-    /// #![feature(pointer_is_aligned)]
+    /// #![feature(pointer_is_aligned_to)]
     ///
     /// // On some platforms, the alignment of i32 is less than 4.
     /// #[repr(align(4))]
@@ -1551,7 +1546,7 @@ impl<T: ?Sized> *const T {
     /// cannot be stricter aligned than the reference's underlying allocation.
     ///
     /// ```
-    /// #![feature(pointer_is_aligned)]
+    /// #![feature(pointer_is_aligned_to)]
     /// #![feature(const_pointer_is_aligned)]
     ///
     /// // On some platforms, the alignment of i32 is less than 4.
@@ -1576,7 +1571,7 @@ impl<T: ?Sized> *const T {
     /// pointer is aligned, even if the compiletime pointer wasn't aligned.
     ///
     /// ```
-    /// #![feature(pointer_is_aligned)]
+    /// #![feature(pointer_is_aligned_to)]
     /// #![feature(const_pointer_is_aligned)]
     ///
     /// // On some platforms, the alignment of i32 is less than 4.
@@ -1600,7 +1595,7 @@ impl<T: ?Sized> *const T {
     /// runtime and compiletime.
     ///
     /// ```
-    /// #![feature(pointer_is_aligned)]
+    /// #![feature(pointer_is_aligned_to)]
     /// #![feature(const_pointer_is_aligned)]
     ///
     /// const _: () = {
@@ -1616,7 +1611,7 @@ impl<T: ?Sized> *const T {
     /// [tracking issue]: https://github.com/rust-lang/rust/issues/104203
     #[must_use]
     #[inline]
-    #[unstable(feature = "pointer_is_aligned", issue = "96284")]
+    #[unstable(feature = "pointer_is_aligned_to", issue = "96284")]
     #[rustc_const_unstable(feature = "const_pointer_is_aligned", issue = "104203")]
     pub const fn is_aligned_to(self, align: usize) -> bool {
         if !align.is_power_of_two() {
diff --git a/library/core/src/ptr/mut_ptr.rs b/library/core/src/ptr/mut_ptr.rs
index 3dde83541d4..e9d39b2c276 100644
--- a/library/core/src/ptr/mut_ptr.rs
+++ b/library/core/src/ptr/mut_ptr.rs
@@ -1660,8 +1660,6 @@ impl<T: ?Sized> *mut T {
     /// # Examples
     ///
     /// ```
-    /// #![feature(pointer_is_aligned)]
-    ///
     /// // On some platforms, the alignment of i32 is less than 4.
     /// #[repr(align(4))]
     /// struct AlignedI32(i32);
@@ -1684,7 +1682,6 @@ impl<T: ?Sized> *mut T {
     /// underlying allocation.
     ///
     /// ```
-    /// #![feature(pointer_is_aligned)]
     /// #![feature(const_pointer_is_aligned)]
     /// #![feature(const_mut_refs)]
     ///
@@ -1711,7 +1708,6 @@ impl<T: ?Sized> *mut T {
     /// pointer is aligned, even if the compiletime pointer wasn't aligned.
     ///
     /// ```
-    /// #![feature(pointer_is_aligned)]
     /// #![feature(const_pointer_is_aligned)]
     ///
     /// // On some platforms, the alignment of primitives is less than their size.
@@ -1738,7 +1734,6 @@ impl<T: ?Sized> *mut T {
     /// runtime and compiletime.
     ///
     /// ```
-    /// #![feature(pointer_is_aligned)]
     /// #![feature(const_pointer_is_aligned)]
     ///
     /// // On some platforms, the alignment of primitives is less than their size.
@@ -1762,7 +1757,7 @@ impl<T: ?Sized> *mut T {
     /// [tracking issue]: https://github.com/rust-lang/rust/issues/104203
     #[must_use]
     #[inline]
-    #[unstable(feature = "pointer_is_aligned", issue = "96284")]
+    #[stable(feature = "pointer_is_aligned", since = "CURRENT_RUSTC_VERSION")]
     #[rustc_const_unstable(feature = "const_pointer_is_aligned", issue = "104203")]
     pub const fn is_aligned(self) -> bool
     where
@@ -1783,7 +1778,7 @@ impl<T: ?Sized> *mut T {
     /// # Examples
     ///
     /// ```
-    /// #![feature(pointer_is_aligned)]
+    /// #![feature(pointer_is_aligned_to)]
     ///
     /// // On some platforms, the alignment of i32 is less than 4.
     /// #[repr(align(4))]
@@ -1812,7 +1807,7 @@ impl<T: ?Sized> *mut T {
     /// cannot be stricter aligned than the reference's underlying allocation.
     ///
     /// ```
-    /// #![feature(pointer_is_aligned)]
+    /// #![feature(pointer_is_aligned_to)]
     /// #![feature(const_pointer_is_aligned)]
     /// #![feature(const_mut_refs)]
     ///
@@ -1838,7 +1833,7 @@ impl<T: ?Sized> *mut T {
     /// pointer is aligned, even if the compiletime pointer wasn't aligned.
     ///
     /// ```
-    /// #![feature(pointer_is_aligned)]
+    /// #![feature(pointer_is_aligned_to)]
     /// #![feature(const_pointer_is_aligned)]
     ///
     /// // On some platforms, the alignment of i32 is less than 4.
@@ -1863,7 +1858,7 @@ impl<T: ?Sized> *mut T {
     /// runtime and compiletime.
     ///
     /// ```
-    /// #![feature(pointer_is_aligned)]
+    /// #![feature(pointer_is_aligned_to)]
     /// #![feature(const_pointer_is_aligned)]
     ///
     /// const _: () = {
@@ -1879,7 +1874,7 @@ impl<T: ?Sized> *mut T {
     /// [tracking issue]: https://github.com/rust-lang/rust/issues/104203
     #[must_use]
     #[inline]
-    #[unstable(feature = "pointer_is_aligned", issue = "96284")]
+    #[unstable(feature = "pointer_is_aligned_to", issue = "96284")]
     #[rustc_const_unstable(feature = "const_pointer_is_aligned", issue = "104203")]
     pub const fn is_aligned_to(self, align: usize) -> bool {
         if !align.is_power_of_two() {
diff --git a/library/core/src/ptr/non_null.rs b/library/core/src/ptr/non_null.rs
index c0a36bb405e..f0e4b958bc6 100644
--- a/library/core/src/ptr/non_null.rs
+++ b/library/core/src/ptr/non_null.rs
@@ -1288,7 +1288,6 @@ impl<T: ?Sized> NonNull<T> {
     /// # Examples
     ///
     /// ```
-    /// #![feature(pointer_is_aligned)]
     /// use std::ptr::NonNull;
     ///
     /// // On some platforms, the alignment of i32 is less than 4.
@@ -1313,7 +1312,6 @@ impl<T: ?Sized> NonNull<T> {
     /// underlying allocation.
     ///
     /// ```
-    /// #![feature(pointer_is_aligned)]
     /// #![feature(const_pointer_is_aligned)]
     /// #![feature(non_null_convenience)]
     /// #![feature(const_option)]
@@ -1343,7 +1341,6 @@ impl<T: ?Sized> NonNull<T> {
     /// pointer is aligned, even if the compiletime pointer wasn't aligned.
     ///
     /// ```
-    /// #![feature(pointer_is_aligned)]
     /// #![feature(const_pointer_is_aligned)]
     ///
     /// // On some platforms, the alignment of primitives is less than their size.
@@ -1369,7 +1366,6 @@ impl<T: ?Sized> NonNull<T> {
     /// runtime and compiletime.
     ///
     /// ```
-    /// #![feature(pointer_is_aligned)]
     /// #![feature(const_pointer_is_aligned)]
     /// #![feature(const_option)]
     /// #![feature(const_nonnull_new)]
@@ -1394,7 +1390,7 @@ impl<T: ?Sized> NonNull<T> {
     /// ```
     ///
     /// [tracking issue]: https://github.com/rust-lang/rust/issues/104203
-    #[unstable(feature = "pointer_is_aligned", issue = "96284")]
+    #[stable(feature = "pointer_is_aligned", since = "CURRENT_RUSTC_VERSION")]
     #[rustc_const_unstable(feature = "const_pointer_is_aligned", issue = "104203")]
     #[must_use]
     #[inline]
@@ -1417,7 +1413,7 @@ impl<T: ?Sized> NonNull<T> {
     /// # Examples
     ///
     /// ```
-    /// #![feature(pointer_is_aligned)]
+    /// #![feature(pointer_is_aligned_to)]
     ///
     /// // On some platforms, the alignment of i32 is less than 4.
     /// #[repr(align(4))]
@@ -1446,7 +1442,7 @@ impl<T: ?Sized> NonNull<T> {
     /// cannot be stricter aligned than the reference's underlying allocation.
     ///
     /// ```
-    /// #![feature(pointer_is_aligned)]
+    /// #![feature(pointer_is_aligned_to)]
     /// #![feature(const_pointer_is_aligned)]
     ///
     /// // On some platforms, the alignment of i32 is less than 4.
@@ -1471,7 +1467,7 @@ impl<T: ?Sized> NonNull<T> {
     /// pointer is aligned, even if the compiletime pointer wasn't aligned.
     ///
     /// ```
-    /// #![feature(pointer_is_aligned)]
+    /// #![feature(pointer_is_aligned_to)]
     /// #![feature(const_pointer_is_aligned)]
     ///
     /// // On some platforms, the alignment of i32 is less than 4.
@@ -1495,7 +1491,7 @@ impl<T: ?Sized> NonNull<T> {
     /// runtime and compiletime.
     ///
     /// ```
-    /// #![feature(pointer_is_aligned)]
+    /// #![feature(pointer_is_aligned_to)]
     /// #![feature(const_pointer_is_aligned)]
     ///
     /// const _: () = {
@@ -1509,7 +1505,7 @@ impl<T: ?Sized> NonNull<T> {
     /// ```
     ///
     /// [tracking issue]: https://github.com/rust-lang/rust/issues/104203
-    #[unstable(feature = "pointer_is_aligned", issue = "96284")]
+    #[unstable(feature = "pointer_is_aligned_to", issue = "96284")]
     #[rustc_const_unstable(feature = "const_pointer_is_aligned", issue = "104203")]
     #[must_use]
     #[inline]
diff --git a/library/core/src/sync/atomic.rs b/library/core/src/sync/atomic.rs
index 77002ef87aa..0a749fcb8f9 100644
--- a/library/core/src/sync/atomic.rs
+++ b/library/core/src/sync/atomic.rs
@@ -418,14 +418,12 @@ impl AtomicBool {
     /// # Examples
     ///
     /// ```
-    /// #![feature(pointer_is_aligned)]
     /// use std::sync::atomic::{self, AtomicBool};
-    /// use std::mem::align_of;
     ///
     /// // Get a pointer to an allocated value
     /// let ptr: *mut bool = Box::into_raw(Box::new(false));
     ///
-    /// assert!(ptr.is_aligned_to(align_of::<AtomicBool>()));
+    /// assert!(ptr.cast::<AtomicBool>().is_aligned());
     ///
     /// {
     ///     // Create an atomic view of the allocated value
@@ -1216,14 +1214,12 @@ impl<T> AtomicPtr<T> {
     /// # Examples
     ///
     /// ```
-    /// #![feature(pointer_is_aligned)]
     /// use std::sync::atomic::{self, AtomicPtr};
-    /// use std::mem::align_of;
     ///
     /// // Get a pointer to an allocated value
     /// let ptr: *mut *mut u8 = Box::into_raw(Box::new(std::ptr::null_mut()));
     ///
-    /// assert!(ptr.is_aligned_to(align_of::<AtomicPtr<u8>>()));
+    /// assert!(ptr.cast::<AtomicPtr<u8>>().is_aligned());
     ///
     /// {
     ///     // Create an atomic view of the allocated value
@@ -2199,14 +2195,12 @@ macro_rules! atomic_int {
             /// # Examples
             ///
             /// ```
-            /// #![feature(pointer_is_aligned)]
             #[doc = concat!($extra_feature, "use std::sync::atomic::{self, ", stringify!($atomic_type), "};")]
-            /// use std::mem::align_of;
             ///
             /// // Get a pointer to an allocated value
             #[doc = concat!("let ptr: *mut ", stringify!($int_type), " = Box::into_raw(Box::new(0));")]
             ///
-            #[doc = concat!("assert!(ptr.is_aligned_to(align_of::<", stringify!($atomic_type), ">()));")]
+            #[doc = concat!("assert!(ptr.cast::<", stringify!($atomic_type), ">().is_aligned());")]
             ///
             /// {
             ///     // Create an atomic view of the allocated value
diff --git a/library/core/tests/lib.rs b/library/core/tests/lib.rs
index 421062f5873..f6d975c2c1e 100644
--- a/library/core/tests/lib.rs
+++ b/library/core/tests/lib.rs
@@ -95,7 +95,7 @@
 #![feature(const_waker)]
 #![feature(never_type)]
 #![feature(unwrap_infallible)]
-#![feature(pointer_is_aligned)]
+#![feature(pointer_is_aligned_to)]
 #![feature(portable_simd)]
 #![feature(ptr_metadata)]
 #![feature(lazy_cell)]
diff --git a/library/std/src/lib.rs b/library/std/src/lib.rs
index 3781ae15c3a..31a8711e0eb 100644
--- a/library/std/src/lib.rs
+++ b/library/std/src/lib.rs
@@ -341,7 +341,7 @@
 #![feature(panic_can_unwind)]
 #![feature(panic_info_message)]
 #![feature(panic_internals)]
-#![feature(pointer_is_aligned)]
+#![feature(pointer_is_aligned_to)]
 #![feature(portable_simd)]
 #![feature(prelude_2024)]
 #![feature(ptr_as_uninit)]
diff --git a/src/tools/miri/tests/pass-dep/shims/posix_memalign.rs b/src/tools/miri/tests/pass-dep/shims/posix_memalign.rs
index 5cf62995fbe..db66b213416 100644
--- a/src/tools/miri/tests/pass-dep/shims/posix_memalign.rs
+++ b/src/tools/miri/tests/pass-dep/shims/posix_memalign.rs
@@ -1,6 +1,6 @@
 //@ignore-target-windows: No libc on Windows
 
-#![feature(pointer_is_aligned)]
+#![feature(pointer_is_aligned_to)]
 #![feature(strict_provenance)]
 
 use core::ptr;
diff --git a/tests/assembly/is_aligned.rs b/tests/assembly/is_aligned.rs
index 9d637793f87..14423a52064 100644
--- a/tests/assembly/is_aligned.rs
+++ b/tests/assembly/is_aligned.rs
@@ -7,7 +7,7 @@
 #![crate_type="rlib"]
 
 #![feature(core_intrinsics)]
-#![feature(pointer_is_aligned)]
+#![feature(pointer_is_aligned_to)]
 
 // CHECK-LABEL: is_aligned_to_unchecked
 // CHECK: decq
diff --git a/tests/ui/mir/alignment/packed.rs b/tests/ui/mir/alignment/packed.rs
index fe8ecc668b8..1a12425f11a 100644
--- a/tests/ui/mir/alignment/packed.rs
+++ b/tests/ui/mir/alignment/packed.rs
@@ -1,7 +1,7 @@
 //@ run-pass
 //@ compile-flags: -C debug-assertions
 
-#![feature(strict_provenance, pointer_is_aligned)]
+#![feature(strict_provenance)]
 
 #[repr(packed)]
 struct Misaligner {
diff --git a/tests/ui/structs-enums/type-sizes.rs b/tests/ui/structs-enums/type-sizes.rs
index 66f663ce077..50491d5ef3e 100644
--- a/tests/ui/structs-enums/type-sizes.rs
+++ b/tests/ui/structs-enums/type-sizes.rs
@@ -4,7 +4,7 @@
 #![allow(dead_code)]
 #![feature(generic_nonzero)]
 #![feature(never_type)]
-#![feature(pointer_is_aligned)]
+#![feature(pointer_is_aligned_to)]
 #![feature(strict_provenance)]
 
 use std::mem::size_of;