// MIR for `mem_replace` after runtime-optimized

fn mem_replace(_1: &mut u32, _2: u32) -> u32 {
    debug r => _1;
    debug v => _2;
    let mut _0: u32;
    scope 1 (inlined std::mem::replace::<u32>) {
        scope 2 {
        }
    }

    bb0: {
        _0 = copy (*_1);
        (*_1) = copy _2;
        return;
    }
}