Use non-generic inner function for pointer formatting

library/core/src/fmt/mod.rs

@@ -2186,6 +2186,9 @@ fn fmt(&self, f: &mut Formatter<'_>) -> Result {
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<T: ?Sized> Pointer for *const T {
     fn fmt(&self, f: &mut Formatter<'_>) -> Result {
+        /// Since the formatting will be identical for all pointer types, use a non-monomorphized
+        /// implementation for the actual formatting to reduce the amount of codegen work needed
+        fn inner(ptr: *const (), f: &mut Formatter<'_>) -> Result {
             let old_width = f.width;
             let old_flags = f.flags;
 
@@ -2202,13 +2205,16 @@ fn fmt(&self, f: &mut Formatter<'_>) -> Result {
             }
             f.flags |= 1 << (FlagV1::Alternate as u32);
 
-        let ret = LowerHex::fmt(&(*self as *const () as usize), f);
+            let ret = LowerHex::fmt(&(ptr as usize), f);
 
             f.width = old_width;
             f.flags = old_flags;
 
             ret
         }
+
+        inner(*self as *const (), f)
+    }
 }
 
 #[stable(feature = "rust1", since = "1.0.0")]