Landing: b052d6bbbeea
Project / Subsystem
gcc / gcc/tree-optimization
Date
2026-06-26
Author
Richard Biener
Commit
b052d6bbbeea2b04c8a4f765e89b0b3f19f81764
Source
github
Perf win
Yes
Breaking
No
All attributes
- project
- gcc
- subsystem
- gcc/tree-optimization
- patch_id
- —
- commit_hash
- b052d6bbbeea2b04c8a4f765e89b0b3f19f81764
- source_type
- github
- headline
- Iterate PRE clean for cyclic value graphs
- tldr
- Fix PRE pass to handle cyclic value graphs by iterating.
- author
- Richard Biener
- outcome
- committed
- performance_win
- true
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • optimization
- • compiler
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-06-26T00:00:00.000Z
The PRE (Partial Redundancy Elimination) optimization pass now iterates to correctly prune invalid expressions when encountering cyclic value graphs. This change addresses a specific test case exhibiting this cycle, ensuring more robust optimization.