Landing: eb2a693190a7
Project / Subsystem
gcc / gcc/frange
Date
2026-07-28
Author
Aldy Hernandez
Commit
eb2a693190a71c5671de024dd4a0e4f961ef8b87
Source
github
Perf win
No
Breaking
No
All attributes
- project
- gcc
- subsystem
- gcc/frange
- patch_id
- —
- commit_hash
- eb2a693190a71c5671de024dd4a0e4f961ef8b87
- source_type
- github
- headline
- Rewrite intersect to meet sub-ranges pairwise.
- tldr
- frange::intersect operation now pairwise intersects sub-ranges for more precise results.
- author
- Aldy Hernandez
- outcome
- committed
- performance_win
- false
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • optimization
- • value-range analysis
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-07-28T00:00:00.000Z
The frange::intersect operation has been rewritten to perform pairwise intersections of sub-ranges from two range sets. This provides a more accurate intersection result compared to the previous method, which treated the ranges as single intervals. As MAX_PAIRS is still 1, the cross-product in the intersection will yield at most one resulting piece, meaning no functional change for now, but this lays the groundwork for handling multiple sub-ranges more effectively in the future.