Landing: 83998f47450c

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Project / Subsystem

gcc / rs6000

Date

2026-09-11

Author

Manjunath S Matti

Commit

83998f47450c088493c971d46ae3b6dadb7242b3

Source

github

Perf win

Breaking

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All attributes

project: gcc
subsystem: rs6000
patch_id: —
commit_hash: 83998f47450c088493c971d46ae3b6dadb7242b3
source_type: github
headline: Rs6000 adds ABI and libgcc support for C23 _BitInt.
tldr: Rs6000 now supports C23 _BitInt types by adding target hooks and libgcc runtime support.
author: Manjunath S Matti
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • rs6000
• powerpc
• c23
• bitint
• abi
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/83998f47450c088493c971d46ae3b6dadb7242b3
date: 2026-09-11T00:00:00.000Z

Support for C23’s _BitInt type has been added to the rs6000 (PowerPC) architecture. This includes implementing the necessary target hooks and libgcc runtime support that were previously missing. The changes define how _BitInt types are represented using machine modes, how they are passed and returned by reference for larger sizes, and ensure correct integration with existing integer promotion rules.