Rollup merge of #111966 - saethlin:inline-slice-tryfrom, r=thomcc

Add #[inline] to array TryFrom impls

I was looking into https://github.com/rust-lang/rust/issues/111959 and I realized we don't have these. They seem like an uncontroversial addition.

IMO this PR does not fix that issue. I think the bad codegen is being caused by some underlying deeper problem but this change might cause the MIR inliner to paper over it in this specific case.

r? `@thomcc`

1 files changed, 4 insertions, 0 deletions

diff --git a/library/core/src/array/mod.rs b/library/core/src/array/mod.rs
index bdb4c975909..e3885d485b7 100644
--- a/library/core/src/array/mod.rs
+++ b/library/core/src/array/mod.rs
@@ -204,6 +204,7 @@ where
 {
     type Error = TryFromSliceError;
 
+    #[inline]
     fn try_from(slice: &[T]) -> Result<[T; N], TryFromSliceError> {
         <&Self>::try_from(slice).map(|r| *r)
     }
@@ -228,6 +229,7 @@ where
 {
     type Error = TryFromSliceError;
 
+    #[inline]
     fn try_from(slice: &mut [T]) -> Result<[T; N], TryFromSliceError> {
         <Self>::try_from(&*slice)
     }
@@ -249,6 +251,7 @@ where
 impl<'a, T, const N: usize> TryFrom<&'a [T]> for &'a [T; N] {
     type Error = TryFromSliceError;
 
+    #[inline]
     fn try_from(slice: &'a [T]) -> Result<&'a [T; N], TryFromSliceError> {
         if slice.len() == N {
             let ptr = slice.as_ptr() as *const [T; N];
@@ -276,6 +279,7 @@ impl<'a, T, const N: usize> TryFrom<&'a [T]> for &'a [T; N] {
 impl<'a, T, const N: usize> TryFrom<&'a mut [T]> for &'a mut [T; N] {
     type Error = TryFromSliceError;
 
+    #[inline]
     fn try_from(slice: &'a mut [T]) -> Result<&'a mut [T; N], TryFromSliceError> {
         if slice.len() == N {
             let ptr = slice.as_mut_ptr() as *mut [T; N];