rust/tests/mir-opt/building/match_false_edges.main.built.after.mir

// MIR for `main` after built

fn main() -> () {
    let mut _0: ();
    let mut _1: i32;
    let mut _2: std::option::Option<i32>;
    let mut _3: isize;
    let mut _4: isize;
    let mut _5: &std::option::Option<i32>;
    let _6: i32;
    let _7: &i32;
    let mut _8: bool;
    let _9: std::option::Option<i32>;
    let _10: i32;
    let _11: &i32;
    let mut _12: bool;
    let mut _13: i32;
    let _14: std::option::Option<i32>;
    scope 1 {
    }
    scope 2 {
        debug _w => _6;
        debug _w => _7;
    }
    scope 3 {
        debug _x => _9;
    }
    scope 4 {
        debug y => _10;
        debug y => _11;
    }
    scope 5 {
        debug _z => _14;
    }

    bb0: {
        StorageLive(_1);
        StorageLive(_2);
        _2 = Option::<i32>::Some(const 1_i32);
        PlaceMention(_2);
        _4 = discriminant(_2);
        switchInt(move _4) -> [1: bb8, otherwise: bb2];
    }

    bb1: {
        FakeRead(ForMatchedPlace(None), _2);
        unreachable;
    }

    bb2: {
        falseEdge -> [real: bb15, imaginary: bb6];
    }

    bb3: {
        _3 = discriminant(_2);
        switchInt(move _3) -> [1: bb6, otherwise: bb4];
    }

    bb4: {
        StorageLive(_14);
        _14 = _2;
        _1 = const 4_i32;
        StorageDead(_14);
        goto -> bb21;
    }

    bb5: {
        goto -> bb1;
    }

    bb6: {
        falseEdge -> [real: bb16, imaginary: bb4];
    }

    bb7: {
        goto -> bb4;
    }

    bb8: {
        falseEdge -> [real: bb10, imaginary: bb2];
    }

    bb9: {
        goto -> bb2;
    }

    bb10: {
        StorageLive(_7);
        _7 = &((_2 as Some).0: i32);
        _5 = &fake _2;
        StorageLive(_8);
        _8 = guard() -> [return: bb11, unwind: bb24];
    }

    bb11: {
        switchInt(move _8) -> [0: bb13, otherwise: bb12];
    }

    bb12: {
        StorageDead(_8);
        FakeRead(ForMatchGuard, _5);
        FakeRead(ForGuardBinding, _7);
        StorageLive(_6);
        _6 = ((_2 as Some).0: i32);
        _1 = const 1_i32;
        StorageDead(_6);
        StorageDead(_7);
        goto -> bb21;
    }

    bb13: {
        goto -> bb14;
    }

    bb14: {
        StorageDead(_8);
        StorageDead(_7);
        falseEdge -> [real: bb9, imaginary: bb2];
    }

    bb15: {
        StorageLive(_9);
        _9 = _2;
        _1 = const 2_i32;
        StorageDead(_9);
        goto -> bb21;
    }

    bb16: {
        StorageLive(_11);
        _11 = &((_2 as Some).0: i32);
        _5 = &fake _2;
        StorageLive(_12);
        StorageLive(_13);
        _13 = (*_11);
        _12 = guard2(move _13) -> [return: bb17, unwind: bb24];
    }

    bb17: {
        switchInt(move _12) -> [0: bb19, otherwise: bb18];
    }

    bb18: {
        StorageDead(_13);
        StorageDead(_12);
        FakeRead(ForMatchGuard, _5);
        FakeRead(ForGuardBinding, _11);
        StorageLive(_10);
        _10 = ((_2 as Some).0: i32);
        _1 = const 3_i32;
        StorageDead(_10);
        StorageDead(_11);
        goto -> bb21;
    }

    bb19: {
        goto -> bb20;
    }

    bb20: {
        StorageDead(_13);
        StorageDead(_12);
        StorageDead(_11);
        falseEdge -> [real: bb7, imaginary: bb4];
    }

    bb21: {
        PlaceMention(_1);
        StorageDead(_2);
        StorageDead(_1);
        _0 = const ();
        return;
    }

    bb22: {
        FakeRead(ForMatchedPlace(None), _1);
        unreachable;
    }

    bb23: {
        goto -> bb22;
    }

    bb24 (cleanup): {
        resume;
    }
}