- // MIR for `custom_discr` before JumpThreading
+ // MIR for `custom_discr` after JumpThreading
  
  fn custom_discr(_1: bool) -> u8 {
      debug x => _1;
      let mut _0: u8;
      let mut _2: CustomDiscr;
      let mut _3: bool;
      let mut _4: u8;
  
      bb0: {
          StorageLive(_2);
          StorageLive(_3);
          _3 = copy _1;
          switchInt(move _3) -> [0: bb2, otherwise: bb1];
      }
  
      bb1: {
          _2 = CustomDiscr::A;
-         goto -> bb3;
+         goto -> bb7;
      }
  
      bb2: {
          _2 = CustomDiscr::B;
          goto -> bb3;
      }
  
      bb3: {
          StorageDead(_3);
          _4 = discriminant(_2);
-         switchInt(move _4) -> [35: bb5, otherwise: bb4];
+         goto -> bb4;
      }
  
      bb4: {
          _0 = const 13_u8;
          goto -> bb6;
      }
  
      bb5: {
          _0 = const 5_u8;
          goto -> bb6;
      }
  
      bb6: {
          StorageDead(_2);
          return;
+     }
+ 
+     bb7: {
+         StorageDead(_3);
+         _4 = discriminant(_2);
+         goto -> bb5;
      }
  }