// MIR for `f` after DestinationPropagation

fn f(_1: usize) -> usize {
    debug a => _1;
    let mut _0: usize;
    let _2: usize;
    let mut _3: usize;
    let mut _4: usize;
    scope 1 {
        debug b => _3;
    }

    bb0: {
        nop;
        _3 = _1;
        _1 = const 5_usize;
        nop;
        nop;
        _1 = move _3;
        nop;
        nop;
        nop;
        _0 = id::<usize>(move _1) -> [return: bb1, unwind unreachable];
    }

    bb1: {
        nop;
        nop;
        return;
    }
}