Landing: 4f6eeefe8d81
Project / Subsystem
gcc / rs6000
Date
2026-09-25
Author
Surya Kumari Jangala
Commit
4f6eeefe8d8146af48ae6526e398d3b46640822a
Source
github
Perf win
No
Breaking
No
All attributes
- project
- gcc
- subsystem
- rs6000
- patch_id
- —
- commit_hash
- 4f6eeefe8d8146af48ae6526e398d3b46640822a
- source_type
- github
- headline
- rs6000: Fix lane extraction for vec_extract
- tldr
- Corrects lane extraction in `vec_extract` by ensuring special handling only for relevant swappable instructions.
- author
- Surya Kumari Jangala
- outcome
- committed
- performance_win
- false
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • rs6000
- • optimization
- • vector instructions
- • rtl
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-09-25T00:00:00.000Z
This commit refactors the rs6000_analyze_swaps function to accurately handle vec_extract operations. It ensures that special handling for swappable instructions is applied only when webs contain permuting load/store instructions, preventing unnecessary adjustments to extracted lanes and improving code generation for non-permuting loads/stores.