Landing: 7ec15f8a0b35
Project / Subsystem
gcc / gcc/middle-end
Date
2026-06-04
Author
Andrew Pinski
Commit
7ec15f8a0b357e33a9c93ad25e4401dd75b7d466
Source
github
Perf win
No
Breaking
No
All attributes
- project
- gcc
- subsystem
- gcc/middle-end
- patch_id
- —
- commit_hash
- 7ec15f8a0b357e33a9c93ad25e4401dd75b7d466
- source_type
- github
- headline
- Disabling a match pattern for non-GIMPLE avoids infinite loops.
- tldr
- GCC now disables a specific optimization pattern for non-GIMPLE code, preventing a stack overflow crash.
- author
- Andrew Pinski
- outcome
- committed
- performance_win
- false
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • bugfix
- • optimization
- • middle-end
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-06-04T00:00:00.000Z
This GCC commit disables a specialized pattern, if (cond) (A | CST1) : (A & ~CST1), when processing non-GIMPLE intermediate representation. Previously, this pattern could interact negatively with the fold optimization pass, creating an infinite loop and leading to a stack overflow. Restricting the pattern to GIMPLE code prevents these crashes, improving compiler stability.