Rollup merge of rust-lang#109357 - saethlin:inline-as-deref, r=thomcc

Add #[inline] to as_deref

While working on rust-lang#109247 I found an `as_deref` call in the compiler that should have been inlined. This fixes the missing inlining (but doesn't address the perf issues I was chasing).

r? `@thomcc`

Author: Dylan-DPC

library/core/src/option.rs

@@ -1310,6 +1310,7 @@ impl<T> Option<T> {
     /// let x: Option<String> = None;
     /// assert_eq!(x.as_deref(), None);
     /// ```
+    #[inline]
     #[stable(feature = "option_deref", since = "1.40.0")]
     #[rustc_const_unstable(feature = "const_option_ext", issue = "91930")]
     pub const fn as_deref(&self) -> Option<&T::Target>
@@ -1336,6 +1337,7 @@ impl<T> Option<T> {
     ///     x
     /// }), Some("HEY".to_owned().as_mut_str()));
     /// ```
+    #[inline]
     #[stable(feature = "option_deref", since = "1.40.0")]
     #[rustc_const_unstable(feature = "const_option_ext", issue = "91930")]
     pub const fn as_deref_mut(&mut self) -> Option<&mut T::Target>

library/core/src/result.rs

@@ -908,6 +908,7 @@ impl<T, E> Result<T, E> {
     /// let y: Result<&str, &u32> = Err(&42);
     /// assert_eq!(x.as_deref(), y);
     /// ```
+    #[inline]
     #[stable(feature = "inner_deref", since = "1.47.0")]
     pub fn as_deref(&self) -> Result<&T::Target, &E>
     where
@@ -934,6 +935,7 @@ impl<T, E> Result<T, E> {
     /// let y: Result<&mut str, &mut u32> = Err(&mut i);
     /// assert_eq!(x.as_deref_mut().map(|x| { x.make_ascii_uppercase(); x }), y);
     /// ```
+    #[inline]
     #[stable(feature = "inner_deref", since = "1.47.0")]
     pub fn as_deref_mut(&mut self) -> Result<&mut T::Target, &mut E>
     where