Landing: c4317bd77775
Project / Subsystem
gcc / gcc
Date
2026-08-07
Author
Aldy Hernandez
Commit
c4317bd77775db690a4f63cfe619ba09018899ad
Source
github
Perf win
Yes
Breaking
No
All attributes
- project
- gcc
- subsystem
- gcc
- patch_id
- —
- commit_hash
- c4317bd77775db690a4f63cfe619ba09018899ad
- source_type
- github
- headline
- Convert float-to-float casts to sub-ranges.
- tldr
- Float-to-float casts are converted to sub-ranges for more precise analysis.
- author
- Aldy Hernandez
- outcome
- committed
- performance_win
- true
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • gcc
- • optimization
- • float
- • range-analysis
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-08-07T00:00:00.000Z
This commit refactors floating-point to floating-point casts to operate on sub-ranges, improving the precision of range analysis. By converting each sub-range individually and then combining the results, the compiler can better understand the possible output values of such casts. A new test case is included to validate this change.