- // MIR for `array_len` before GVN
+ // MIR for `array_len` after GVN
  
  fn array_len(_1: &[u8; N]) -> usize {
      debug arr => _1;
      let mut _0: usize;
      let mut _2: &[u8];
      let mut _3: &[u8; N];
  
      bb0: {
          StorageLive(_2);
          StorageLive(_3);
          _3 = &(*_1);
          _2 = move _3 as &[u8] (PointerCoercion(Unsize, Implicit));
          StorageDead(_3);
-         _0 = PtrMetadata(move _2);
+         _0 = const N;
          goto -> bb1;
      }
  
      bb1: {
          StorageDead(_2);
          return;
      }
  }