- // MIR for `main` before GVN
+ // MIR for `main` after GVN
  
  fn main() -> () {
      let mut _0: ();
      let _1: u8;
      let mut _2: u8;
      let mut _3: (i32, u8, i32);
      let _4: ();
      let mut _5: u8;
      scope 1 {
          debug x => _1;
      }
  
      bb0: {
-         StorageLive(_1);
+         nop;
          StorageLive(_2);
          StorageLive(_3);
          _3 = (const 0_i32, const 1_u8, const 2_i32);
-         _2 = copy (_3.1: u8);
-         _1 = Add(move _2, const 0_u8);
+         _2 = const 1_u8;
+         _1 = const 1_u8;
          StorageDead(_2);
          StorageDead(_3);
          StorageLive(_4);
          StorageLive(_5);
-         _5 = copy _1;
-         _4 = foo(move _5) -> [return: bb1, unwind continue];
+         _5 = const 1_u8;
+         _4 = foo(const 1_u8) -> [return: bb1, unwind continue];
      }
  
      bb1: {
          StorageDead(_5);
          StorageDead(_4);
          _0 = const ();
-         StorageDead(_1);
+         nop;
          return;
      }
  }