rust/src/test/mir-opt/unreachable_diverging.main.UnreachablePropagation.diff

- // MIR for `main` before UnreachablePropagation
+ // MIR for `main` after UnreachablePropagation
  
  fn main() -> () {
      let mut _0: ();                      // return place in scope 0 at $DIR/unreachable_diverging.rs:12:11: 12:11
      let _1: bool;                        // in scope 0 at $DIR/unreachable_diverging.rs:13:9: 13:10
      let mut _2: std::option::Option<Empty>; // in scope 0 at $DIR/unreachable_diverging.rs:14:25: 14:32
      let mut _3: isize;                   // in scope 0 at $DIR/unreachable_diverging.rs:14:12: 14:22
      let _5: ();                          // in scope 0 at $DIR/unreachable_diverging.rs:15:9: 17:10
      let mut _6: bool;                    // in scope 0 at $DIR/unreachable_diverging.rs:15:12: 15:13
      let mut _7: !;                       // in scope 0 at $DIR/unreachable_diverging.rs:18:9: 18:22
      scope 1 {
          debug x => _1;                   // in scope 1 at $DIR/unreachable_diverging.rs:13:9: 13:10
          let _4: Empty;                   // in scope 1 at $DIR/unreachable_diverging.rs:14:17: 14:21
          scope 2 {
              debug bomb => _4;            // in scope 2 at $DIR/unreachable_diverging.rs:14:17: 14:21
          }
      }
  
      bb0: {
          StorageLive(_1);                 // scope 0 at $DIR/unreachable_diverging.rs:13:9: 13:10
          _1 = const true;                 // scope 0 at $DIR/unreachable_diverging.rs:13:13: 13:17
          StorageLive(_2);                 // scope 1 at $DIR/unreachable_diverging.rs:14:25: 14:32
          _2 = const empty() -> bb1;       // scope 1 at $DIR/unreachable_diverging.rs:14:25: 14:32
                                           // mir::Constant
                                           // + span: $DIR/unreachable_diverging.rs:14:25: 14:30
                                           // + literal: Const { ty: fn() -> std::option::Option<Empty> {empty}, val: Value(Scalar(<ZST>)) }
      }
  
      bb1: {
          _3 = discriminant(_2);           // scope 1 at $DIR/unreachable_diverging.rs:14:12: 14:22
          switchInt(move _3) -> [1_isize: bb3, otherwise: bb2]; // scope 1 at $DIR/unreachable_diverging.rs:14:12: 14:22
      }
  
      bb2: {
          _0 = const ();                   // scope 1 at $DIR/unreachable_diverging.rs:14:5: 19:6
                                           // ty::Const
                                           // + ty: ()
                                           // + val: Value(Scalar(<ZST>))
                                           // mir::Constant
                                           // + span: $DIR/unreachable_diverging.rs:14:5: 19:6
                                           // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
          StorageDead(_1);                 // scope 0 at $DIR/unreachable_diverging.rs:20:1: 20:2
          StorageDead(_2);                 // scope 0 at $DIR/unreachable_diverging.rs:20:1: 20:2
          return;                          // scope 0 at $DIR/unreachable_diverging.rs:20:2: 20:2
      }
  
      bb3: {
          StorageLive(_4);                 // scope 1 at $DIR/unreachable_diverging.rs:14:17: 14:21
          _4 = move ((_2 as Some).0: Empty); // scope 1 at $DIR/unreachable_diverging.rs:14:17: 14:21
          StorageLive(_5);                 // scope 2 at $DIR/unreachable_diverging.rs:15:9: 17:10
          StorageLive(_6);                 // scope 2 at $DIR/unreachable_diverging.rs:15:12: 15:13
          _6 = _1;                         // scope 2 at $DIR/unreachable_diverging.rs:15:12: 15:13
-         switchInt(_6) -> [false: bb4, otherwise: bb5]; // scope 2 at $DIR/unreachable_diverging.rs:15:9: 17:10
+         goto -> bb4;                     // scope 2 at $DIR/unreachable_diverging.rs:15:9: 17:10
      }
  
      bb4: {
-         _5 = const ();                   // scope 2 at $DIR/unreachable_diverging.rs:15:9: 17:10
-                                          // ty::Const
-                                          // + ty: ()
-                                          // + val: Value(Scalar(<ZST>))
+         _5 = const loop_forever() -> bb5; // scope 2 at $DIR/unreachable_diverging.rs:16:13: 16:27
                                           // mir::Constant
-                                          // + span: $DIR/unreachable_diverging.rs:15:9: 17:10
-                                          // + literal: Const { ty: (), val: Value(Scalar(<ZST>)) }
-         goto -> bb6;                     // scope 2 at $DIR/unreachable_diverging.rs:15:9: 17:10
-     }
- 
-     bb5: {
-         _5 = const loop_forever() -> bb6; // scope 2 at $DIR/unreachable_diverging.rs:16:13: 16:27
-                                          // mir::Constant
                                           // + span: $DIR/unreachable_diverging.rs:16:13: 16:25
                                           // + literal: Const { ty: fn() {loop_forever}, val: Value(Scalar(<ZST>)) }
      }
  
-     bb6: {
+     bb5: {
          StorageDead(_6);                 // scope 2 at $DIR/unreachable_diverging.rs:17:9: 17:10
          StorageDead(_5);                 // scope 2 at $DIR/unreachable_diverging.rs:17:9: 17:10
          StorageLive(_7);                 // scope 2 at $DIR/unreachable_diverging.rs:18:9: 18:22
          unreachable;                     // scope 2 at $DIR/unreachable_diverging.rs:18:15: 18:19
      }
  }