rust/tests/mir-opt/pre-codegen/mem_replace.mem_replace.PreCodegen.after.mir

// 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 16 (inlined std::ptr::write::<u32>) {
                    debug dst => _1;
                    debug src => _2;
                    scope 17 {
                    }
                }
            }
            scope 4 (inlined std::ptr::read::<u32>) {
                debug src => _1;
                scope 5 {
                    scope 6 (inlined std::ptr::read::runtime::<u32>) {
                        debug src => _1;
                        scope 7 (inlined intrinsics::is_aligned_and_not_null::<u32>) {
                            debug ptr => _1;
                            scope 8 (inlined ptr::const_ptr::<impl *const u32>::is_null) {
                                debug self => _1;
                                let mut _3: *const u8;
                                scope 9 {
                                    scope 10 (inlined ptr::const_ptr::<impl *const T>::is_null::runtime_impl) {
                                        debug ptr => _3;
                                        scope 11 (inlined ptr::const_ptr::<impl *const u8>::addr) {
                                            debug self => _3;
                                            scope 12 {
                                                scope 13 (inlined ptr::const_ptr::<impl *const u8>::cast::<()>) {
                                                    debug self => _3;
                                                }
                                            }
                                        }
                                    }
                                }
                            }
                            scope 14 (inlined ptr::const_ptr::<impl *const u32>::is_aligned) {
                                debug self => _1;
                                scope 15 (inlined align_of::<u32>) {
                                }
                            }
                        }
                    }
                }
            }
        }
    }

    bb0: {
        StorageLive(_3);
        _0 = (*_1);
        StorageDead(_3);
        (*_1) = _2;
        return;
    }
}