Landing: f8d911e6ae3f
Project / Subsystem
gcc / gcc/tree-vect
Date
2026-03-02
Author
Richard Biener
Commit
f8d911e6ae3fc14c33780ab950511e2b5a20484c
Source
github
Perf win
Yes
Breaking
No
All attributes
- project
- gcc
- subsystem
- gcc/tree-vect
- patch_id
- —
- commit_hash
- f8d911e6ae3fc14c33780ab950511e2b5a20484c
- source_type
- github
- headline
- Simplify Scalar Statement Coverage in vect_bb_slp_mark_live_stmts
- tldr
- The compiler now uses full scalar statement coverage to determine live lanes during vectorization more precisely.
- author
- Richard Biener
- outcome
- committed
- performance_win
- true
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • optimization
- • vectorization
- • SLP
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-03-02T00:00:00.000Z
This change simplifies the process of marking live statements in basic blocks during SLP vectorization. By utilizing the full scalar statement coverage denoted by SLP_TREE_TYPE, the compiler can more accurately identify which lanes are live for code generation, leading to potential performance improvements.