Landing: 5b0d2e93e1ad

← All landings

Project / Subsystem

gcc / risc-v

Date

2026-07-21

Author

Robin Dapp

Commit

5b0d2e93e1ad39ee6f731abeee2e8846bcf5da93

Source

github

Perf win

Yes

Breaking

View on GitHub →

All attributes

project: gcc
subsystem: risc-v
patch_id: —
commit_hash: 5b0d2e93e1ad39ee6f731abeee2e8846bcf5da93
source_type: github
headline: RISC-V: Use ordered scatter variants.
tldr: RISC-V vectorizer now uses ordered scatter operations, ensuring correct behavior for the vectorizer.
author: Robin Dapp
outcome: committed
performance_win: true
breaking_change: false
series_id: —
series_parts: []
tags: • risc-v
• vectorization
• scatter
• optimization
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/5b0d2e93e1ad39ee6f731abeee2e8846bcf5da93
date: 2026-07-21T00:00:00.000Z

The RISC-V vectorizer has been updated to use ordered scatter variants instead of unordered ones. This change is necessary because the vectorizer expects scatter operations to write data in a specific, ordered sequence. By using the ordered indexed stores, the compiler ensures that this expectation is met, thereby improving the correctness and reliability of vector code generation for RISC-V.