Landing: 7e35df8c4129
Project / Subsystem
gcc / aarch64
Date
2026-07-08
Author
Philipp Tomsich
Commit
7e35df8c4129c6b6b88b40d2006b926c391cc761
Source
github
Perf win
Yes
Breaking
No
All attributes
- project
- gcc
- subsystem
- aarch64
- patch_id
- —
- commit_hash
- 7e35df8c4129c6b6b88b40d2006b926c391cc761
- source_type
- github
- headline
- Populate issue_info for Ampere1 family cores
- tldr
- Vector issue information is now populated for Ampere1 family cores, enabling reduction loop unrolling.
- author
- Philipp Tomsich
- outcome
- committed
- performance_win
- true
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • aarch64
- • optimization
- • performance
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-07-08T00:00:00.000Z
This commit addresses an issue where vector issue information was missing for Ampere1, Ampere1a, and Ampere1b cores. By populating the cpu_vector_cost with details from the Ampere1 optimization guide, the compiler can now correctly determine unroll factors for reduction loops, enabling multi-accumulator unrolling on these processors.