Landing: 8dcf4a63cf3f
Project / Subsystem
gcc / gcc
Date
2026-08-24
Author
Andrew MacLeod
Commit
8dcf4a63cf3f9fcceed9235066055f0ad7ef09ab
Source
github
Perf win
No
Breaking
No
All attributes
- project
- gcc
- subsystem
- gcc
- patch_id
- —
- commit_hash
- 8dcf4a63cf3f9fcceed9235066055f0ad7ef09ab
- source_type
- github
- headline
- Save edge in remove_unreachable to handle block splits.
- tldr
- GCC's `remove_unreachable` optimization now saves edges instead of endpoints to correctly handle code block splits.
- author
- Andrew MacLeod
- outcome
- committed
- performance_win
- false
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • optimization
- • refactor
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-08-24T00:00:00.000Z
The remove_unreachable optimization in GCC’s tree-ssa pass has been updated to save edges rather than block endpoints. This change ensures that the optimization correctly handles situations where basic blocks are split during the process. A new test case, pr126999.c, has been added to verify this fix.