Landing: ad6087410356
Project / Subsystem
gcc / gcc/match
Date
2026-07-04
Author
Andrew Pinski
Commit
ad6087410356999730cbe9680ada3077f4afcf76
Source
github
Perf win
No
Breaking
No
All attributes
- project
- gcc
- subsystem
- gcc/match
- patch_id
- —
- commit_hash
- ad6087410356999730cbe9680ada3077f4afcf76
- source_type
- github
- headline
- Fix match pattern for `((a ^ b) & c) cmp d || a != b`
- tldr
- Improved pattern matching for logical operations to correctly handle non-short-circuiting evaluation.
- author
- Andrew Pinski
- outcome
- committed
- performance_win
- false
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • optimization
- • pattern matching
- • gcc
- • tree-ssa
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-07-04T00:00:00.000Z
This commit refactors a pattern matching rule in GCC’s match.pd to correctly handle logical operations when short-circuiting is disabled. It specifically addresses the ((a ^ b) & c) cmp d || a != b construct by adding support for the && (AND) case, which simplifies to !(((a ^ b) & c) cmp d || a != b), and also fixes operand constraints.