// MIR for `foo` after PreCodegen

fn foo(_1: Option<String>) -> i32 {
    debug s => _1;
    let mut _0: i32;
    let mut _2: bool;
    let mut _3: isize;
    let mut _4: &std::string::String;
    let mut _5: &str;
    let mut _6: bool;
    let _7: std::option::Option<std::string::String>;
    scope 1 {
        debug s => _7;
    }

    bb0: {
        _2 = const false;
        _2 = const true;
        _3 = discriminant(_1);
        switchInt(move _3) -> [1: bb1, otherwise: bb5];
    }

    bb1: {
        _4 = &((_1 as Some).0: std::string::String);
        _5 = <String as Deref>::deref(move _4) -> [return: bb2, unwind unreachable];
    }

    bb2: {
        _6 = <str as PartialEq>::eq(_5, const "a") -> [return: bb3, unwind unreachable];
    }

    bb3: {
        switchInt(move _6) -> [0: bb5, otherwise: bb4];
    }

    bb4: {
        _0 = const 1234_i32;
        goto -> bb7;
    }

    bb5: {
        StorageLive(_7);
        _2 = const false;
        _7 = move _1;
        _0 = const 4321_i32;
        drop(_7) -> [return: bb6, unwind unreachable];
    }

    bb6: {
        StorageDead(_7);
        goto -> bb7;
    }

    bb7: {
        switchInt(_2) -> [0: bb9, otherwise: bb8];
    }

    bb8: {
        drop(_1) -> [return: bb9, unwind unreachable];
    }

    bb9: {
        return;
    }
}