- // MIR for `f` before GVN
+ // MIR for `f` after GVN
  
  fn f(_1: u32) -> () {
      let mut _0: ();
      let mut _2: S;
      let mut _3: S;
  
      bb0: {
          StorageLive(_2);
          _2 = S(copy _1, const 2_u32);
          StorageLive(_3);
-         _3 = S(copy _1, const 2_u32);
+         _3 = copy _2;
          StorageDead(_3);
          StorageDead(_2);
          return;
      }
  }
  
