Landing: 15211513ea09
Project / Subsystem
gcc / gcc/range-analysis
Date
2026-08-04
Author
Aldy Hernandez
Commit
15211513ea09d13c1c13bdf1e057c6f52836ab48
Source
github
Perf win
No
Breaking
No
All attributes
- project
- gcc
- subsystem
- gcc/range-analysis
- patch_id
- —
- commit_hash
- 15211513ea09d13c1c13bdf1e057c6f52836ab48
- source_type
- github
- headline
- Convert operator_abs::fold_range to use sub-ranges
- tldr
- Improves range analysis for absolute value by processing sub-ranges individually.
- author
- Aldy Hernandez
- outcome
- committed
- performance_win
- false
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • optimization
- • range analysis
- • floating point
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-08-04T00:00:00.000Z
This commit refactors the operator_abs::fold_range function within GCC’s range analysis to operate on sub-ranges independently. Previously, taking the absolute value of a range could collapse distinct sub-ranges if they spanned across zero. Now, the absolute value is applied to each sub-range, and the results are unioned, preserving gaps and more accurately representing the range’s properties.