Landing: e0e794b089a1
Project / Subsystem
gcc / risc-v
Date
2026-08-06
Author
Wang Yaduo
Commit
e0e794b089a127e2e1a9660c3a7a6805c4566694
Source
github
Perf win
Yes
Breaking
No
All attributes
- project
- gcc
- subsystem
- risc-v
- patch_id
- —
- commit_hash
- e0e794b089a127e2e1a9660c3a7a6805c4566694
- source_type
- github
- headline
- RISC-V: Add reassociation width hook for tuning
- tldr
- RISC-V tune parameters now specify reassociation widths for integer, float, and vector operations.
- author
- Wang Yaduo
- outcome
- committed
- performance_win
- true
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • risc-v
- • optimization
- • scheduler
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-08-06T00:00:00.000Z
This commit introduces the riscv_reassociation_width function and defines TARGET_SCHED_REASSOCIATION_WIDTH to allow per-tune reassociation widths for RISC-V targets. Specific tunes like ‘generic-ooo’ and ‘xt-c9501fdvt’ receive wider widths (2/2/1 and 3/2/1 respectively) for integer, floating-point, and vector operations, while others default to a width of one. This aims to improve instruction scheduling and performance by allowing more flexible instruction reordering.