- // MIR for `slice_const_length` before GVN
+ // MIR for `slice_const_length` after GVN
  
  fn slice_const_length(_1: &[i32]) -> *const [i32] {
      debug x => _1;
      let mut _0: *const [i32];
      let _2: *const i32;
      let mut _3: &[i32];
      let mut _5: *const i32;
      let mut _6: usize;
      scope 1 {
          debug ptr => _2;
          let _4: usize;
          scope 2 {
              debug len => _4;
          }
      }
  
      bb0: {
-         StorageLive(_2);
+         nop;
          StorageLive(_3);
          _3 = &(*_1);
          _2 = core::slice::<impl [i32]>::as_ptr(move _3) -> [return: bb1, unwind continue];
      }
  
      bb1: {
          StorageDead(_3);
-         StorageLive(_4);
+         nop;
          _4 = const 123_usize;
          StorageLive(_5);
          _5 = copy _2;
          StorageLive(_6);
-         _6 = copy _4;
-         _0 = *const [i32] from (move _5, move _6);
+         _6 = const 123_usize;
+         _0 = *const [i32] from (copy _2, const 123_usize);
          StorageDead(_6);
          StorageDead(_5);
-         StorageDead(_4);
-         StorageDead(_2);
+         nop;
+         nop;
          return;
      }
  }