Rollup merge of rust-lang#67155 - kraai:move-instead-of-binding-to-reference, r=cramertj

Move `Layout`s instead of binding by reference

Author: tmandry

src/libcore/alloc.rs

@@ -1142,9 +1142,9 @@ pub unsafe trait Alloc {
         where Self: Sized
     {
         match Layout::array::<T>(n) {
-            Ok(ref layout) if layout.size() > 0 => {
+            Ok(layout) if layout.size() > 0 => {
                 unsafe {
-                    self.alloc(layout.clone()).map(|p| p.cast())
+                    self.alloc(layout).map(|p| p.cast())
                 }
             }
             _ => Err(AllocErr),
@@ -1192,9 +1192,9 @@ pub unsafe trait Alloc {
         where Self: Sized
     {
         match (Layout::array::<T>(n_old), Layout::array::<T>(n_new)) {
-            (Ok(ref k_old), Ok(ref k_new)) if k_old.size() > 0 && k_new.size() > 0 => {
+            (Ok(k_old), Ok(k_new)) if k_old.size() > 0 && k_new.size() > 0 => {
                 debug_assert!(k_old.align() == k_new.align());
-                self.realloc(ptr.cast(), k_old.clone(), k_new.size()).map(NonNull::cast)
+                self.realloc(ptr.cast(), k_old, k_new.size()).map(NonNull::cast)
             }
             _ => {
                 Err(AllocErr)
@@ -1226,8 +1226,8 @@ pub unsafe trait Alloc {
         where Self: Sized
     {
         match Layout::array::<T>(n) {
-            Ok(ref k) if k.size() > 0 => {
-                Ok(self.dealloc(ptr.cast(), k.clone()))
+            Ok(k) if k.size() > 0 => {
+                Ok(self.dealloc(ptr.cast(), k))
             }
             _ => {
                 Err(AllocErr)