Landing: 2671f988c928

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Project / Subsystem

gcc / s390x

Date

2026-09-21

Author

Juergen Christ

Commit

2671f988c928d3d6cd81ebec86a5c3dee938e8cd

Source

github

Perf win

Yes

Breaking

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All attributes

project: gcc
subsystem: s390x
patch_id: —
commit_hash: 2671f988c928d3d6cd81ebec86a5c3dee938e8cd
source_type: github
headline: s390x: Optimize vec_perm intrinsic by folding into VEC_PERM_EXPR
tldr: Improves s390x vector permutation optimization by folding the vec_perm intrinsic.
author: Juergen Christ
outcome: committed
performance_win: true
breaking_change: false
series_id: —
series_parts: []
tags: • s390x
• optimization
• vector
• gcc
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/2671f988c928d3d6cd81ebec86a5c3dee938e8cd
date: 2026-09-21T00:00:00.000Z

The s390x backend now optimizes the vec_perm intrinsic by folding it into a VEC_PERM_EXPR. This allows the GCC optimizer to better process and optimize vector permutation operations, potentially leading to more efficient code generation for vector processing on s390x architectures.