Landing: 4e08734e5fcf

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Project / Subsystem

gcc / libstdc++

Date

2026-08-17

Author

Matthias Kretz

Commit

4e08734e5fcfba5fb657a163a20c001236655f01

Source

github

Perf win

Breaking

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All attributes

project: gcc
subsystem: libstdc++
patch_id: —
commit_hash: 4e08734e5fcfba5fb657a163a20c001236655f01
source_type: github
headline: libstdc++: Resolve integer type mismatches in stdx::simd [PR122981]
tldr: Fixes integer type mismatches in stdx::simd for ARM targets, improving type safety and compatibility.
author: Matthias Kretz
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • libstdc++
• arm
• simd
• type safety
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/4e08734e5fcfba5fb657a163a20c001236655f01
date: 2026-08-17T00:00:00.000Z

This patch resolves integer type mismatches in stdx::simd that affected ARM targets, particularly arm-none-eabi. Due to int32_t being defined as long, generic int vectors passed as int32x2_t were causing compilation errors. The fix uses intN_t aliases consistently and ensures correct bitcasting in NEON popcount implementation, enhancing type safety and avoiding unnecessary reinterpretations.