lib/std/zig/Zir.zig                                            | 97 ++++++++++++++++----------------
 src/Zcu.zig                                                    | 90 ++++++++++++++---------------
 src/Zcu/PerThread.zig                                          | 22 +++-----
 test/incremental/add_field_and_nested_struct_uses_changed_decl | 25 ++++++++
 test/incremental/do_nothing                                    | 41 ++++++++++++++
 5 files changed, 169 insertions(+), 106 deletions(-)