- // MIR for `main` before GVN
+ // MIR for `main` after GVN
  
  fn main() -> () {
      let mut _0: ();
      let _1: usize;
      let mut _2: *const i32;
      let _3: &i32;
      let _4: ();
      let mut _5: usize;
      scope 1 {
          debug x => _1;
      }
  
      bb0: {
-         StorageLive(_1);
+         nop;
          StorageLive(_2);
          StorageLive(_3);
          _3 = const main::FOO;
          _2 = &raw const (*_3);
          _1 = move _2 as usize (PointerExposeProvenance);
          StorageDead(_2);
          StorageDead(_3);
          StorageLive(_4);
          StorageLive(_5);
          _5 = copy _1;
-         _4 = read(move _5) -> [return: bb1, unwind continue];
+         _4 = read(copy _1) -> [return: bb1, unwind continue];
      }
  
      bb1: {
          StorageDead(_5);
          StorageDead(_4);
          _0 = const ();
-         StorageDead(_1);
+         nop;
          return;
      }
  }