Landing: 3c71ff89bb03
Project / Subsystem
gcc / bpf
Date
2026-07-20
Author
Vineet Gupta
Commit
3c71ff89bb03152828f0efc5f1de5febf35fc039
Source
github
Perf win
No
Breaking
No
All attributes
- project
- gcc
- subsystem
- bpf
- patch_id
- —
- commit_hash
- 3c71ff89bb03152828f0efc5f1de5febf35fc039
- source_type
- github
- headline
- bpf: Use pattern_cost() for instruction cost estimation
- tldr
- BPF backend now uses a generic pattern_cost() function instead of hardcoding instruction costs.
- author
- Vineet Gupta
- outcome
- committed
- performance_win
- false
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • bpf
- • cost model
- • optimization
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-07-20T00:00:00.000Z
The BPF backend has been updated to use the generic pattern_cost() function for estimating instruction costs, replacing a hardcoded value of 1. This change aligns the BPF backend with practices in other GCC backends, providing a more consistent and flexible way to manage instruction costs. The cost of a default instruction is now determined by its associated pattern, allowing for finer-grained cost modeling.