Landing: 5d123455af27

← All landings

Project / Subsystem

gcc / gcc/tree-optimization

Date

2026-08-12

Author

Richard Biener

Commit

5d123455af27c526d9aa1e12a47d0177262b0e51

Source

github

Perf win

Yes

Breaking

View on GitHub →

All attributes

project: gcc
subsystem: gcc/tree-optimization
patch_id: —
commit_hash: 5d123455af27c526d9aa1e12a47d0177262b0e51
source_type: github
headline: Vectorizer handles MMX/SSE mask interaction with AVX512.
tldr: Vectorizer now correctly converts between integer and vector integer masks for AVX512.
author: Richard Biener
outcome: committed
performance_win: true
breaking_change: false
series_id: —
series_parts: []
tags: • x86
• avx512
• vectorization
• optimization
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/5d123455af27c526d9aa1e12a47d0177262b0e51
date: 2026-08-12T00:00:00.000Z

The GCC vectorizer can now handle the interaction between MMX/SSE integer masks and AVX512 vector integer masks. It introduces a conversion for V2SImode using vcond_mask, addressing a gap in pattern recognition for mask representation. This improves vectorization of code using AVX512 instructions.