- // MIR for `concrete` before ConstProp
+ // MIR for `concrete` after ConstProp
  
  fn concrete() -> () {
      let mut _0: ();
      let _1: usize;
      let mut _2: usize;
      let mut _4: usize;
      let mut _6: usize;
      let mut _8: usize;
      scope 1 {
          debug x => _1;
          let _3: usize;
          scope 2 {
              debug y => _3;
              let _5: usize;
              scope 3 {
                  debug z0 => _5;
                  let _7: usize;
                  scope 4 {
                      debug z1 => _7;
                  }
              }
          }
      }
  
      bb0: {
          StorageLive(_1);
          StorageLive(_2);
-         _2 = OffsetOf(Alpha, [0]);
+         _2 = const 4_usize;
          _1 = must_use::<usize>(move _2) -> [return: bb1, unwind unreachable];
      }
  
      bb1: {
          StorageDead(_2);
          StorageLive(_3);
          StorageLive(_4);
-         _4 = OffsetOf(Alpha, [1]);
+         _4 = const 0_usize;
          _3 = must_use::<usize>(move _4) -> [return: bb2, unwind unreachable];
      }
  
      bb2: {
          StorageDead(_4);
          StorageLive(_5);
          StorageLive(_6);
-         _6 = OffsetOf(Alpha, [2, 0]);
+         _6 = const 2_usize;
          _5 = must_use::<usize>(move _6) -> [return: bb3, unwind unreachable];
      }
  
      bb3: {
          StorageDead(_6);
          StorageLive(_7);
          StorageLive(_8);
-         _8 = OffsetOf(Alpha, [2, 1]);
+         _8 = const 3_usize;
          _7 = must_use::<usize>(move _8) -> [return: bb4, unwind unreachable];
      }
  
      bb4: {
          StorageDead(_8);
          _0 = const ();
          StorageDead(_7);
          StorageDead(_5);
          StorageDead(_3);
          StorageDead(_1);
          return;
      }
  }