| - // MIR for `too_complex` before JumpThreading | 
 | + // MIR for `too_complex` after JumpThreading | 
 |    | 
 |   fn too_complex(_1: Result<i32, usize>) -> Option<i32> { | 
 |       debug x => _1; | 
 |       let mut _0: std::option::Option<i32>; | 
 |       let mut _2: std::ops::ControlFlow<usize, i32>; | 
 |       let mut _3: isize; | 
 |       let _4: i32; | 
 |       let _5: usize; | 
 |       let mut _6: isize; | 
 |       let _7: i32; | 
 |       let _8: usize; | 
 |       scope 1 { | 
 |           debug v => _4; | 
 |       } | 
 |       scope 2 { | 
 |           debug r => _5; | 
 |       } | 
 |       scope 3 { | 
 |           debug v => _7; | 
 |       } | 
 |       scope 4 { | 
 |           debug r => _8; | 
 |       } | 
 |    | 
 |       bb0: { | 
 |           StorageLive(_2); | 
 |           _3 = discriminant(_1); | 
 |           switchInt(move _3) -> [0: bb3, 1: bb2, otherwise: bb1]; | 
 |       } | 
 |    | 
 |       bb1: { | 
 |           unreachable; | 
 |       } | 
 |    | 
 |       bb2: { | 
 |           _5 = copy ((_1 as Err).0: usize); | 
 |           _2 = ControlFlow::<usize, i32>::Break(copy _5); | 
 | -         goto -> bb4; | 
 | +         goto -> bb8; | 
 |       } | 
 |    | 
 |       bb3: { | 
 |           _4 = copy ((_1 as Ok).0: i32); | 
 |           _2 = ControlFlow::<usize, i32>::Continue(copy _4); | 
 |           goto -> bb4; | 
 |       } | 
 |    | 
 |       bb4: { | 
 |           _6 = discriminant(_2); | 
 | -         switchInt(move _6) -> [0: bb6, 1: bb5, otherwise: bb1]; | 
 | +         goto -> bb6; | 
 |       } | 
 |    | 
 |       bb5: { | 
 |           StorageLive(_8); | 
 |           _8 = copy ((_2 as Break).0: usize); | 
 |           _0 = const Option::<i32>::None; | 
 |           StorageDead(_8); | 
 |           goto -> bb7; | 
 |       } | 
 |    | 
 |       bb6: { | 
 |           _7 = copy ((_2 as Continue).0: i32); | 
 |           _0 = Option::<i32>::Some(copy _7); | 
 |           goto -> bb7; | 
 |       } | 
 |    | 
 |       bb7: { | 
 |           StorageDead(_2); | 
 |           return; | 
 | +     } | 
 | +  | 
 | +     bb8: { | 
 | +         _6 = discriminant(_2); | 
 | +         goto -> bb5; | 
 |       } | 
 |   } | 
 |    | 
 |   ALLOC0 (size: 8, align: 4) { | 
 |       00 00 00 00 __ __ __ __                         │ ....░░░░ | 
 |   } | 
 |    |