Landing: f4b5c2bf40d6
Project / Subsystem
gcc / gcc/match
Date
2026-03-26
Author
Pengxuan Zheng
Commit
f4b5c2bf40d68e1666c83556a236a53cdddc34a2
Source
github
Perf win
Yes
Breaking
No
All attributes
- project
- gcc
- subsystem
- gcc/match
- patch_id
- —
- commit_hash
- f4b5c2bf40d68e1666c83556a236a53cdddc34a2
- source_type
- github
- headline
- Match: Add simplifications for min/max comparisons.
- tldr
- The compiler can now simplify comparisons between min(a, b) and max(a, b) to true, false, a!=b, or a==b.
- author
- Pengxuan Zheng
- outcome
- committed
- performance_win
- true
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • optimization
- • pattern-matching
- • min
- • max
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-03-26T00:00:00.000Z
New patterns were added to simplify comparisons between the results of min(a, b) and max(a, b). Specifically, expressions like min(a,b) <= max(a,b) will now reduce to true, min(a,b) > max(a,b) to false, min(a,b) < max(a,b) to a!=b, and min(a,b) >= max(a,b) to a==b. This can help later optimization passes by removing complexity early.