Landing: d7a53868a7fa

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Project / Subsystem

gcc / gcc

Date

2026-05-13

Author

Richard Biener

Commit

d7a53868a7fa1c57032ff1b2544311df0f5af31a

Source

github

Perf win

Yes

Breaking

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project: gcc
subsystem: gcc
patch_id: —
commit_hash: d7a53868a7fa1c57032ff1b2544311df0f5af31a
source_type: github
headline: Record (de-)composition type in ls_type for VMAT_STRIDED_SLP accesses.
tldr: This commit records vector decomposition information for strided SLP accesses, which will help in target-specific cost modeling.
author: Richard Biener
outcome: committed
performance_win: true
breaking_change: false
series_id: —
series_parts: []
tags: • vectorization
• optimization
• slp
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/d7a53868a7fa1c57032ff1b2544311df0f5af31a
date: 2026-05-13T00:00:00.000Z

This commit enhances vectorization by recording the vector (de-)composition type for VMAT_STRIDED_SLP (vectorizable memory access type, strided, Super-word Level Parallelism) loads and stores. This information is stored in the ls_type field of the load/store data, making it available during target costing. This allows the compiler to make more informed decisions about the cost and effectiveness of vectorization for specific target architectures.