- // MIR for `array_len_by_value` before InstCombine
+ // MIR for `array_len_by_value` after InstCombine
  
  fn array_len_by_value(_1: [u8; N]) -> usize {
      debug arr => _1;                     // in scope 0 at $DIR/lower_array_len.rs:37:43: 37:46
      let mut _0: usize;                   // return place in scope 0 at $DIR/lower_array_len.rs:37:60: 37:65
      let mut _2: &[u8];                   // in scope 0 at $DIR/lower_array_len.rs:38:5: 38:14
      let mut _3: &[u8; N];                // in scope 0 at $DIR/lower_array_len.rs:38:5: 38:14
      let mut _4: &[u8; N];                // in scope 0 at $DIR/lower_array_len.rs:38:5: 38:14
  
      bb0: {
          StorageLive(_2);                 // scope 0 at $DIR/lower_array_len.rs:38:5: 38:14
          StorageLive(_3);                 // scope 0 at $DIR/lower_array_len.rs:38:5: 38:14
          _3 = &_1;                        // scope 0 at $DIR/lower_array_len.rs:38:5: 38:14
          StorageLive(_4);                 // scope 0 at $DIR/lower_array_len.rs:38:5: 38:14
          _4 = _3;                         // scope 0 at $DIR/lower_array_len.rs:38:5: 38:14
          _2 = move _3 as &[u8] (Pointer(Unsize)); // scope 0 at $DIR/lower_array_len.rs:38:5: 38:14
          StorageDead(_3);                 // scope 0 at $DIR/lower_array_len.rs:38:7: 38:8
-         _0 = Len((*_4));                 // scope 0 at $DIR/lower_array_len.rs:38:5: 38:14
+         _0 = const N;                    // scope 0 at $DIR/lower_array_len.rs:38:5: 38:14
          StorageDead(_4);                 // scope 0 at $DIR/lower_array_len.rs:38:5: 38:14
          StorageDead(_2);                 // scope 0 at $DIR/lower_array_len.rs:38:13: 38:14
          return;                          // scope 0 at $DIR/lower_array_len.rs:39:2: 39:2
      }
  }