Stabilize intrinsics as const

Author: jhpratt

library/core/src/intrinsics.rs

@@ -1593,15 +1593,15 @@ extern "rust-intrinsic" {
     /// Safe wrappers for this intrinsic are available on the integer
     /// primitives via the `checked_div` method. For example,
     /// [`u32::checked_div`]
-    #[rustc_const_unstable(feature = "const_int_unchecked_arith", issue = "none")]
+    #[rustc_const_stable(feature = "const_int_unchecked_arith", since = "1.51.0")]
     pub fn unchecked_div<T: Copy>(x: T, y: T) -> T;
     /// Returns the remainder of an unchecked division, resulting in
     /// undefined behavior when `y == 0` or `x == T::MIN && y == -1`
     ///
     /// Safe wrappers for this intrinsic are available on the integer
     /// primitives via the `checked_rem` method. For example,
     /// [`u32::checked_rem`]
-    #[rustc_const_unstable(feature = "const_int_unchecked_arith", issue = "none")]
+    #[rustc_const_stable(feature = "const_int_unchecked_arith", since = "1.51.0")]
     pub fn unchecked_rem<T: Copy>(x: T, y: T) -> T;
 
     /// Performs an unchecked left shift, resulting in undefined behavior when

library/core/src/num/int_macros.rs

@@ -514,7 +514,6 @@ macro_rules! int_impl {
         /// ```
         #[stable(feature = "rust1", since = "1.0.0")]
         #[rustc_const_stable(feature = "const_checked_int_methods", since = "1.51.0")]
-        #[rustc_allow_const_fn_unstable(const_int_unchecked_arith)]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
         #[inline]
@@ -567,7 +566,6 @@ macro_rules! int_impl {
         /// ```
         #[stable(feature = "wrapping", since = "1.7.0")]
         #[rustc_const_stable(feature = "const_checked_int_methods", since = "1.51.0")]
-        #[rustc_allow_const_fn_unstable(const_int_unchecked_arith)]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
         #[inline]

library/core/src/num/uint_macros.rs

@@ -523,7 +523,6 @@ macro_rules! uint_impl {
         /// ```
         #[stable(feature = "rust1", since = "1.0.0")]
         #[rustc_const_stable(feature = "const_checked_int_methods", since = "1.51.0")]
-        #[rustc_allow_const_fn_unstable(const_int_unchecked_arith)]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
         #[inline]
@@ -575,7 +574,6 @@ macro_rules! uint_impl {
         /// ```
         #[stable(feature = "wrapping", since = "1.7.0")]
         #[rustc_const_stable(feature = "const_checked_int_methods", since = "1.51.0")]
-        #[rustc_allow_const_fn_unstable(const_int_unchecked_arith)]
         #[must_use = "this returns the result of the operation, \
                       without modifying the original"]
         #[inline]