// MIR for `mem_replace` after PreCodegen

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>) {
        debug dest => _1;
        debug src => _2;
        scope 2 {
            scope 3 {
                debug result => _0;
                scope 7 (inlined std::ptr::write::<u32>) {
                    debug dst => _1;
                    debug src => _2;
                    scope 8 {
                        scope 9 (inlined std::ptr::write::runtime::<u32>) {
                            debug dst => _1;
                        }
                    }
                }
            }
            scope 4 (inlined std::ptr::read::<u32>) {
                debug src => _1;
                scope 5 {
                    scope 6 (inlined std::ptr::read::runtime::<u32>) {
                        debug src => _1;
                    }
                }
            }
        }
    }

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