rust/tests/mir-opt/separate_const_switch.identity.SeparateConstSwitch.diff

- // MIR for `identity` before SeparateConstSwitch
+ // MIR for `identity` after SeparateConstSwitch
  
  fn identity(_1: Result<i32, i32>) -> Result<i32, i32> {
      debug x => _1;                       // in scope 0 at $DIR/separate_const_switch.rs:+0:13: +0:14
      let mut _0: std::result::Result<i32, i32>; // return place in scope 0 at $DIR/separate_const_switch.rs:+0:37: +0:53
      let mut _2: i32;                     // in scope 0 at $DIR/separate_const_switch.rs:+1:8: +1:10
      let mut _3: std::ops::ControlFlow<std::result::Result<std::convert::Infallible, i32>, i32>; // in scope 0 at $DIR/separate_const_switch.rs:+1:8: +1:10
      let mut _4: std::result::Result<i32, i32>; // in scope 0 at $DIR/separate_const_switch.rs:+1:8: +1:9
      let mut _5: isize;                   // in scope 0 at $DIR/separate_const_switch.rs:+1:9: +1:10
      let _6: std::result::Result<std::convert::Infallible, i32>; // in scope 0 at $DIR/separate_const_switch.rs:+1:9: +1:10
      let mut _7: std::result::Result<std::convert::Infallible, i32>; // in scope 0 at $DIR/separate_const_switch.rs:+1:9: +1:10
      let _8: i32;                         // in scope 0 at $DIR/separate_const_switch.rs:+1:8: +1:10
      scope 1 {
          debug residual => _6;            // in scope 1 at $DIR/separate_const_switch.rs:+1:9: +1:10
          scope 2 {
              scope 8 (inlined #[track_caller] <Result<i32, i32> as FromResidual<Result<Infallible, i32>>>::from_residual) { // at $DIR/separate_const_switch.rs:25:8: 25:10
                  debug residual => _6;    // in scope 8 at $SRC_DIR/core/src/result.rs:LL:COL
                  let _13: i32;            // in scope 8 at $SRC_DIR/core/src/result.rs:LL:COL
                  let mut _14: i32;        // in scope 8 at $SRC_DIR/core/src/result.rs:LL:COL
                  scope 9 {
                      debug e => _13;      // in scope 9 at $SRC_DIR/core/src/result.rs:LL:COL
                      scope 10 (inlined <i32 as From<i32>>::from) { // at $SRC_DIR/core/src/result.rs:LL:COL
                          debug t => _13;  // in scope 10 at $SRC_DIR/core/src/convert/mod.rs:LL:COL
                      }
                  }
              }
          }
      }
      scope 3 {
          debug val => _8;                 // in scope 3 at $DIR/separate_const_switch.rs:+1:8: +1:10
          scope 4 {
          }
      }
      scope 5 (inlined <Result<i32, i32> as Try>::branch) { // at $DIR/separate_const_switch.rs:25:8: 25:10
          debug self => _1;                // in scope 5 at $SRC_DIR/core/src/result.rs:LL:COL
          let mut _9: isize;               // in scope 5 at $SRC_DIR/core/src/result.rs:LL:COL
          let _10: i32;                    // in scope 5 at $SRC_DIR/core/src/result.rs:LL:COL
          let _11: i32;                    // in scope 5 at $SRC_DIR/core/src/result.rs:LL:COL
          let mut _12: std::result::Result<std::convert::Infallible, i32>; // in scope 5 at $SRC_DIR/core/src/result.rs:LL:COL
          scope 6 {
              debug v => _10;              // in scope 6 at $SRC_DIR/core/src/result.rs:LL:COL
          }
          scope 7 {
              debug e => _11;              // in scope 7 at $SRC_DIR/core/src/result.rs:LL:COL
          }
      }
  
      bb0: {
          StorageLive(_3);                 // scope 0 at $DIR/separate_const_switch.rs:+1:8: +1:10
          StorageLive(_10);                // scope 0 at $DIR/separate_const_switch.rs:+1:8: +1:10
          StorageLive(_11);                // scope 0 at $DIR/separate_const_switch.rs:+1:8: +1:10
          _9 = discriminant(_1);           // scope 5 at $SRC_DIR/core/src/result.rs:LL:COL
          switchInt(move _9) -> [0: bb7, 1: bb5, otherwise: bb6]; // scope 5 at $SRC_DIR/core/src/result.rs:LL:COL
      }
  
      bb1: {
          StorageDead(_11);                // scope 0 at $DIR/separate_const_switch.rs:+1:8: +1:10
          StorageDead(_10);                // scope 0 at $DIR/separate_const_switch.rs:+1:8: +1:10
          _5 = discriminant(_3);           // scope 0 at $DIR/separate_const_switch.rs:+1:8: +1:10
          switchInt(move _5) -> [0: bb2, 1: bb4, otherwise: bb3]; // scope 0 at $DIR/separate_const_switch.rs:+1:8: +1:10
      }
  
      bb2: {
          _8 = ((_3 as Continue).0: i32);  // scope 0 at $DIR/separate_const_switch.rs:+1:8: +1:10
          _0 = Result::<i32, i32>::Ok(_8); // scope 0 at $DIR/separate_const_switch.rs:+1:5: +1:11
          StorageDead(_3);                 // scope 0 at $DIR/separate_const_switch.rs:+2:1: +2:2
          return;                          // scope 0 at $DIR/separate_const_switch.rs:+2:2: +2:2
      }
  
      bb3: {
          unreachable;                     // scope 0 at $DIR/separate_const_switch.rs:+1:8: +1:10
      }
  
      bb4: {
          _6 = ((_3 as Break).0: std::result::Result<std::convert::Infallible, i32>); // scope 0 at $DIR/separate_const_switch.rs:+1:9: +1:10
          _13 = ((_6 as Err).0: i32);      // scope 8 at $SRC_DIR/core/src/result.rs:LL:COL
          _0 = Result::<i32, i32>::Err(move _13); // scope 9 at $SRC_DIR/core/src/result.rs:LL:COL
          StorageDead(_3);                 // scope 0 at $DIR/separate_const_switch.rs:+2:1: +2:2
          return;                          // scope 0 at $DIR/separate_const_switch.rs:+2:2: +2:2
      }
  
      bb5: {
          _11 = ((_1 as Err).0: i32);      // scope 5 at $SRC_DIR/core/src/result.rs:LL:COL
          StorageLive(_12);                // scope 7 at $SRC_DIR/core/src/result.rs:LL:COL
          _12 = Result::<Infallible, i32>::Err(move _11); // scope 7 at $SRC_DIR/core/src/result.rs:LL:COL
          _3 = ControlFlow::<Result<Infallible, i32>, i32>::Break(move _12); // scope 7 at $SRC_DIR/core/src/result.rs:LL:COL
          StorageDead(_12);                // scope 7 at $SRC_DIR/core/src/result.rs:LL:COL
          goto -> bb1;                     // scope 5 at $SRC_DIR/core/src/result.rs:LL:COL
      }
  
      bb6: {
          unreachable;                     // scope 5 at $SRC_DIR/core/src/result.rs:LL:COL
      }
  
      bb7: {
          _10 = ((_1 as Ok).0: i32);       // scope 5 at $SRC_DIR/core/src/result.rs:LL:COL
          _3 = ControlFlow::<Result<Infallible, i32>, i32>::Continue(move _10); // scope 6 at $SRC_DIR/core/src/result.rs:LL:COL
          goto -> bb1;                     // scope 5 at $SRC_DIR/core/src/result.rs:LL:COL
      }
  }