Landing: 6317befec95f
Project / Subsystem
gcc / objc
Date
2026-03-01
Author
Iain Sandoe
Commit
6317befec95f7829da7cb27870279d5d284e96f0
Source
github
Perf win
No
Breaking
No
All attributes
- project
- gcc
- subsystem
- objc
- patch_id
- —
- commit_hash
- 6317befec95f7829da7cb27870279d5d284e96f0
- source_type
- github
- headline
- Objective-C,C++: Rework metadata generation
- tldr
- Improves Objective-C metadata generation by adding indices and type information.
- author
- Iain Sandoe
- outcome
- committed
- performance_win
- false
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • objective-c
- • metadata
- • lto
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-03-01T00:00:00.000Z
This commit refactors the generation of Objective-C metadata, which describes module properties to the runtime. The metadata, represented by CONSTRUCTORS, needs to be preserved even if seemingly unused during Link-Time Optimization (LTO), as the runtime actively uses it.
Previously, these metadata CONSTRUCTORS lacked proper indices and typing. This change introduces a more robust mechanism for generating metadata objects with correct indices (numerical or structure member references) and appropriate data types. Internal APIs for metadata construction have also been renamed for clarity.