- // MIR for `f` before GVN
+ // MIR for `f` after GVN
  
  fn f() -> u32 {
      let mut _0: u32;
      let _1: u32;
      let mut _2: E;
      let mut _3: &U;
      let _4: U;
      let mut _5: &U;
      scope 1 {
          debug i => _1;
      }
  
      bb0: {
          StorageLive(_2);
          StorageLive(_3);
          _5 = const f::promoted[0];
          _3 = &(*_5);
          _2 = copy ((*_3).1: E);
-         StorageLive(_1);
+         nop;
          _1 = copy ((_2 as A).1: u32);
          StorageDead(_3);
          StorageDead(_2);
          _0 = copy _1;
-         StorageDead(_1);
+         nop;
          return;
      }
  }