Landing: 5c09804150b2
Project / Subsystem
gcc / gcc/vectorization
Date
2026-04-29
Author
Richard Biener
Commit
5c09804150b2da7c18751905e7f1a23b7357bc06
Source
github
Perf win
No
Breaking
No
All attributes
- project
- gcc
- subsystem
- gcc/vectorization
- patch_id
- —
- commit_hash
- 5c09804150b2da7c18751905e7f1a23b7357bc06
- source_type
- github
- headline
- Adjust x86 vectorization tests for cost comparison.
- tldr
- GCC test suite updates include duplicating vectorization tests with explicit cost comparison flags to ensure accurate behavior.
- author
- Richard Biener
- outcome
- committed
- performance_win
- false
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • gcc
- • vectorization
- • x86
- • testing
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-04-29T00:00:00.000Z
Several x86 vectorization tests have been adjusted to account for the enabled vector cost comparison feature. The changes involve duplicating test cases, with one version explicitly disabling cost comparison (--param ix86-vect-compare-costs=0) and the other enabling it (--param ix86-vect-compare-costs=1). This allows verifying the behavior of the vectorizer under both configurations, particularly for epilogue selection.