- // MIR for `impossible_predicate` before ImpossiblePredicates
+ // MIR for `impossible_predicate` after ImpossiblePredicates
  
  fn impossible_predicate(_1: &mut i32) -> (&mut i32, &mut i32) {
-     debug x => _1;
      let mut _0: (&mut i32, &mut i32);
-     let _2: &mut i32;
-     let mut _3: &mut i32;
-     let mut _4: &mut i32;
      scope 1 {
-         debug y => _2;
      }
  
      bb0: {
-         StorageLive(_2);
-         _2 = copy _1;
-         FakeRead(ForLet(None), _2);
-         StorageLive(_3);
-         _3 = &mut (*_2);
-         StorageLive(_4);
-         _4 = &mut (*_1);
-         _0 = (move _3, move _4);
-         StorageDead(_4);
-         StorageDead(_3);
-         StorageDead(_2);
-         return;
+         unreachable;
      }
  }