// MIR for `checked_shl` after PreCodegen

fn checked_shl(_1: u32, _2: u32) -> Option<u32> {
    debug x => _1;
    debug rhs => _2;
    let mut _0: std::option::Option<u32>;
    scope 1 (inlined core::num::<impl u32>::checked_shl) {
        let mut _3: bool;
        let mut _4: u32;
        scope 2 (inlined core::num::<impl u32>::unchecked_shl) {
            scope 3 (inlined core::ub_checks::check_language_ub) {
                scope 4 (inlined core::ub_checks::check_language_ub::runtime) {
                }
            }
        }
    }

    bb0: {
        StorageLive(_3);
        _3 = Lt(_2, const core::num::<impl u32>::BITS);
        switchInt(move _3) -> [0: bb1, otherwise: bb2];
    }

    bb1: {
        _0 = const Option::<u32>::None;
        goto -> bb3;
    }

    bb2: {
        StorageLive(_4);
        _4 = ShlUnchecked(_1, _2);
        _0 = Option::<u32>::Some(move _4);
        StorageDead(_4);
        goto -> bb3;
    }

    bb3: {
        StorageDead(_3);
        return;
    }
}

ALLOC0 (size: 8, align: 4) {
    00 00 00 00 __ __ __ __                         │ ....░░░░
}