Landing: 9231e36eeff6
Project / Subsystem
gcc / gcc
Date
2026-08-05
Author
Aldy Hernandez
Commit
9231e36eeff6ec576e99f4c7c4b30e9fced44cd1
Source
github
Perf win
No
Breaking
No
All attributes
- project
- gcc
- subsystem
- gcc
- patch_id
- —
- commit_hash
- 9231e36eeff6ec576e99f4c7c4b30e9fced44cd1
- source_type
- github
- headline
- Add contains_zero_p predicate to value range hierarchy.
- tldr
- Introduces `contains_zero_p` to value range types for clearer zero checks.
- author
- Aldy Hernandez
- outcome
- committed
- performance_win
- false
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • optimization
- • refactor
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-08-05T00:00:00.000Z
This commit introduces a new pure virtual function, contains_zero_p(), to the GCC compiler’s value range analysis hierarchy. This predicate clearly indicates whether a given range includes the value zero. It serves as a more explicit replacement for the previously used nonzero_p() function, which had ambiguous behavior. The new function is implemented for various range types, improving the clarity and precision of range analysis.