- // MIR for `invalid` before EnumSizeOpt
+ // MIR for `invalid` after EnumSizeOpt
  
  fn invalid() -> InvalidIdxs {
      let mut _0: InvalidIdxs;             // return place in scope 0 at $DIR/enum_opt.rs:+0:21: +0:32
      let mut _1: InvalidIdxs;             // in scope 0 at $DIR/enum_opt.rs:+1:7: +1:12
      let mut _2: InvalidIdxs;             // in scope 0 at $DIR/enum_opt.rs:+2:7: +2:36
      let mut _3: [u64; 1024];             // in scope 0 at $DIR/enum_opt.rs:+2:26: +2:35
      scope 1 {
          debug a => _1;                   // in scope 1 at $DIR/enum_opt.rs:+1:7: +1:12
      }
  
      bb0: {
          StorageLive(_1);                 // scope 0 at $DIR/enum_opt.rs:+1:7: +1:12
          _1 = InvalidIdxs::A;             // scope 0 at $DIR/enum_opt.rs:+1:15: +1:29
          StorageLive(_2);                 // scope 1 at $DIR/enum_opt.rs:+2:7: +2:36
          StorageLive(_3);                 // scope 1 at $DIR/enum_opt.rs:+2:26: +2:35
          _3 = [const 0_u64; 1024];        // scope 1 at $DIR/enum_opt.rs:+2:26: +2:35
          _2 = InvalidIdxs::Large(move _3); // scope 1 at $DIR/enum_opt.rs:+2:7: +2:36
          StorageDead(_3);                 // scope 1 at $DIR/enum_opt.rs:+2:35: +2:36
          _1 = move _2;                    // scope 1 at $DIR/enum_opt.rs:+2:3: +2:36
          StorageDead(_2);                 // scope 1 at $DIR/enum_opt.rs:+2:35: +2:36
          _0 = move _1;                    // scope 1 at $DIR/enum_opt.rs:+3:3: +3:4
          StorageDead(_1);                 // scope 0 at $DIR/enum_opt.rs:+4:1: +4:2
          return;                          // scope 0 at $DIR/enum_opt.rs:+4:2: +4:2
      }
  }