- // MIR for `main` before InstrumentCoverage
+ // MIR for `main` after InstrumentCoverage
  
  fn main() -> () {
      let mut _0: ();
      let mut _1: ();
      let mut _2: bool;
      let mut _3: !;
  
+     coverage body span: $DIR/instrument_coverage.rs:14:11: 20:2 (#0)
+     coverage ExpressionId(0) => Expression { lhs: Counter(1), op: Subtract, rhs: Counter(0) };
+     coverage Code(Counter(0)) => $DIR/instrument_coverage.rs:14:1: 14:11 (#0);
+     coverage Code(Counter(1)) => $DIR/instrument_coverage.rs:16:12: 16:17 (#0);
+     coverage Code(Counter(0)) => $DIR/instrument_coverage.rs:17:13: 17:18 (#0);
+     coverage Code(Expression(0)) => $DIR/instrument_coverage.rs:18:10: 18:10 (#0);
+     coverage Code(Counter(0)) => $DIR/instrument_coverage.rs:20:2: 20:2 (#0);
+ 
      bb0: {
+         Coverage::CounterIncrement(0);
          goto -> bb1;
      }
  
      bb1: {
+         Coverage::CounterIncrement(1);
          falseUnwind -> [real: bb2, unwind: bb6];
      }
  
      bb2: {
          StorageLive(_2);
          _2 = bar() -> [return: bb3, unwind: bb6];
      }
  
      bb3: {
          switchInt(move _2) -> [0: bb5, otherwise: bb4];
      }
  
      bb4: {
          _0 = const ();
          StorageDead(_2);
          return;
      }
  
      bb5: {
+         Coverage::ExpressionUsed(0);
          _1 = const ();
          StorageDead(_2);
          goto -> bb1;
      }
  
      bb6 (cleanup): {
          resume;
      }
  }