Landing: e1424f0b3052
Project / Subsystem
gcc / backthreader
Date
2026-09-07
Author
Aldy Hernandez
Commit
e1424f0b30525ced215042169035ff7c1ef5ca9d
Source
github
Perf win
Yes
Breaking
No
All attributes
- project
- gcc
- subsystem
- backthreader
- patch_id
- —
- commit_hash
- e1424f0b30525ced215042169035ff7c1ef5ca9d
- source_type
- github
- headline
- Backthreader optimization skips blocks with no inferred ranges.
- tldr
- Backthreader pass is faster by skipping blocks that have no inferred pointer ranges.
- author
- Aldy Hernandez
- outcome
- committed
- performance_win
- true
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • optimization
- • backthreader
- • gcc
- • performance
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-09-07T00:00:00.000Z
The backthreader pass in GCC has been optimized to improve performance. It now efficiently skips blocks that lack inferred pointer ranges, reducing unnecessary work. This change specifically targets adjust_for_non_null_uses by collecting pointer dependencies once per path and querying the inference oracle only when necessary, leading to a measurable speedup.