os-rust/tests/mir-opt/coverage/branch_match_arms.main.InstrumentCoverage.diff

- // MIR for `main` before InstrumentCoverage
+ // MIR for `main` after InstrumentCoverage
  
  fn main() -> () {
      let mut _0: ();
      let mut _1: Enum;
      let mut _2: isize;
      let _3: u32;
      let mut _4: u32;
      let _5: u32;
      let mut _6: u32;
      let _7: u32;
      let mut _8: u32;
      let _9: u32;
      let mut _10: u32;
      scope 1 {
          debug d => _3;
      }
      scope 2 {
          debug c => _5;
      }
      scope 3 {
          debug b => _7;
      }
      scope 4 {
          debug a => _9;
      }
  
+     coverage body span: $DIR/branch_match_arms.rs:14:11: 21:2 (#0)
+     coverage ExpressionId(0) => Expression { lhs: Counter(1), op: Add, rhs: Counter(2) };
+     coverage ExpressionId(1) => Expression { lhs: Expression(0), op: Add, rhs: Counter(3) };
+     coverage ExpressionId(2) => Expression { lhs: Counter(0), op: Subtract, rhs: Expression(1) };
+     coverage ExpressionId(3) => Expression { lhs: Counter(3), op: Add, rhs: Counter(2) };
+     coverage ExpressionId(4) => Expression { lhs: Expression(3), op: Add, rhs: Counter(1) };
+     coverage ExpressionId(5) => Expression { lhs: Expression(4), op: Add, rhs: Expression(2) };
+     coverage Code(Counter(0)) => 14:1 - 15:21;
+     coverage Code(Counter(3)) => 16:17 - 16:33;
+     coverage Code(Counter(2)) => 17:17 - 17:33;
+     coverage Code(Counter(1)) => 18:17 - 18:33;
+     coverage Code(Expression(2)) => 19:17 - 19:33;
+     coverage Code(Expression(5)) => 21:1 - 21:2;
+ 
      bb0: {
+         Coverage::CounterIncrement(0);
          StorageLive(_1);
          _1 = Enum::A(const 0_u32);
          PlaceMention(_1);
          _2 = discriminant(_1);
          switchInt(move _2) -> [0: bb5, 1: bb4, 2: bb3, 3: bb2, otherwise: bb1];
      }
  
      bb1: {
          FakeRead(ForMatchedPlace(None), _1);
          unreachable;
      }
  
      bb2: {
+         Coverage::CounterIncrement(3);
          falseEdge -> [real: bb8, imaginary: bb3];
      }
  
      bb3: {
+         Coverage::CounterIncrement(2);
          falseEdge -> [real: bb7, imaginary: bb4];
      }
  
      bb4: {
+         Coverage::CounterIncrement(1);
          falseEdge -> [real: bb6, imaginary: bb5];
      }
  
      bb5: {
+         Coverage::ExpressionUsed(2);
          StorageLive(_9);
          _9 = copy ((_1 as A).0: u32);
          StorageLive(_10);
          _10 = copy _9;
          _0 = consume(move _10) -> [return: bb12, unwind: bb14];
      }
  
      bb6: {
          StorageLive(_7);
          _7 = copy ((_1 as B).0: u32);
          StorageLive(_8);
          _8 = copy _7;
          _0 = consume(move _8) -> [return: bb11, unwind: bb14];
      }
  
      bb7: {
          StorageLive(_5);
          _5 = copy ((_1 as C).0: u32);
          StorageLive(_6);
          _6 = copy _5;
          _0 = consume(move _6) -> [return: bb10, unwind: bb14];
      }
  
      bb8: {
          StorageLive(_3);
          _3 = copy ((_1 as D).0: u32);
          StorageLive(_4);
          _4 = copy _3;
          _0 = consume(move _4) -> [return: bb9, unwind: bb14];
      }
  
      bb9: {
          StorageDead(_4);
          StorageDead(_3);
          goto -> bb13;
      }
  
      bb10: {
          StorageDead(_6);
          StorageDead(_5);
          goto -> bb13;
      }
  
      bb11: {
          StorageDead(_8);
          StorageDead(_7);
          goto -> bb13;
      }
  
      bb12: {
          StorageDead(_10);
          StorageDead(_9);
          goto -> bb13;
      }
  
      bb13: {
+         Coverage::ExpressionUsed(5);
          StorageDead(_1);
          return;
      }
  
      bb14 (cleanup): {
          resume;
      }
  }