| - // MIR for `match_nested_if` before MatchBranchSimplification | 
 | + // MIR for `match_nested_if` after MatchBranchSimplification | 
 |    | 
 |   fn match_nested_if() -> bool { | 
 |       let mut _0: bool; | 
 |       let _1: bool; | 
 |       let mut _2: (); | 
 |       let mut _3: bool; | 
 |       let mut _4: bool; | 
 |       let mut _5: bool; | 
 |       let mut _6: bool; | 
 | +     let mut _7: bool; | 
 | +     let mut _8: bool; | 
 | +     let mut _9: bool; | 
 | +     let mut _10: bool; | 
 |       scope 1 { | 
 |           debug val => _1; | 
 |       } | 
 |    | 
 |       bb0: { | 
 |           StorageLive(_1); | 
 |           StorageLive(_2); | 
 |           _2 = (); | 
 |           StorageLive(_3); | 
 |           StorageLive(_4); | 
 |           StorageLive(_5); | 
 |           StorageLive(_6); | 
 |           _6 = const true; | 
 | -         switchInt(move _6) -> [0: bb2, otherwise: bb1]; | 
 | -     } | 
 | -  | 
 | -     bb1: { | 
 | -         _5 = const true; | 
 | -         goto -> bb3; | 
 | -     } | 
 | -  | 
 | -     bb2: { | 
 | -         _5 = const false; | 
 | -         goto -> bb3; | 
 | -     } | 
 | -  | 
 | -     bb3: { | 
 | -         switchInt(move _5) -> [0: bb5, otherwise: bb4]; | 
 | -     } | 
 | -  | 
 | -     bb4: { | 
 | +         StorageLive(_7); | 
 | +         _7 = move _6; | 
 | +         _5 = Ne(copy _7, const false); | 
 | +         StorageDead(_7); | 
 | +         StorageLive(_8); | 
 | +         _8 = move _5; | 
 |           StorageDead(_6); | 
 | -         _4 = const true; | 
 | -         goto -> bb6; | 
 | -     } | 
 | -  | 
 | -     bb5: { | 
 | -         StorageDead(_6); | 
 | -         _4 = const false; | 
 | -         goto -> bb6; | 
 | -     } | 
 | -  | 
 | -     bb6: { | 
 | -         switchInt(move _4) -> [0: bb8, otherwise: bb7]; | 
 | -     } | 
 | -  | 
 | -     bb7: { | 
 | +         _4 = Ne(copy _8, const false); | 
 | +         StorageDead(_8); | 
 | +         StorageLive(_9); | 
 | +         _9 = move _4; | 
 |           StorageDead(_5); | 
 | -         _3 = const true; | 
 | -         goto -> bb9; | 
 | -     } | 
 | -  | 
 | -     bb8: { | 
 | -         StorageDead(_5); | 
 | -         _3 = const false; | 
 | -         goto -> bb9; | 
 | -     } | 
 | -  | 
 | -     bb9: { | 
 | -         switchInt(move _3) -> [0: bb11, otherwise: bb10]; | 
 | -     } | 
 | -  | 
 | -     bb10: { | 
 | +         _3 = Ne(copy _9, const false); | 
 | +         StorageDead(_9); | 
 | +         StorageLive(_10); | 
 | +         _10 = move _3; | 
 |           StorageDead(_4); | 
 |           StorageDead(_3); | 
 | -         _1 = const true; | 
 | -         goto -> bb12; | 
 | -     } | 
 | -  | 
 | -     bb11: { | 
 | -         StorageDead(_4); | 
 | -         StorageDead(_3); | 
 | -         _1 = const false; | 
 | -         goto -> bb12; | 
 | -     } | 
 | -  | 
 | -     bb12: { | 
 | +         _1 = Ne(copy _10, const false); | 
 | +         StorageDead(_10); | 
 |           StorageDead(_2); | 
 |           _0 = copy _1; | 
 |           StorageDead(_1); | 
 |           return; | 
 |       } | 
 |   } | 
 |    |