Landing: b1215a5b1e69
Project / Subsystem
gcc / gcc
Date
2026-09-10
Author
Richard Sandiford
Commit
b1215a5b1e6948733f46ecb4d3918083a1d298f8
Source
github
Perf win
Yes
Breaking
No
All attributes
- project
- gcc
- subsystem
- gcc
- patch_id
- —
- commit_hash
- b1215a5b1e6948733f46ecb4d3918083a1d298f8
- source_type
- github
- headline
- GCC: Optimize recog_data state management
- tldr
- Reduces overhead of managing compiler state by using macros and pointer swapping instead of copying large data structures.
- author
- Richard Sandiford
- outcome
- committed
- performance_win
- true
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • optimization
- • internal
- • compiler internals
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-09-10T00:00:00.000Z
This commit refactors the management of recog_data, a global variable used by the instruction extraction process. Instead of copying the large recog_data_d structure, it is now accessed via a macro that dereferences a pointer. This allows saving and restoring its state by simply swapping pointers, significantly reducing overhead. The change also converts several backends (reload, i386, sh) to use a new RAII class recog_state_saver for managing this state, improving efficiency and code robustness.