Landing: b14ad46e6689

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Project / Subsystem

gcc / aarch64

Date

2026-06-17

Author

Kyrylo Tkachov

Commit

b14ad46e6689cba2dd316bf677ad4f36278f9d3d

Source

github

Perf win

Breaking

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All attributes

project: gcc
subsystem: aarch64
patch_id: —
commit_hash: b14ad46e6689cba2dd316bf677ad4f36278f9d3d
source_type: github
headline: aarch64 fixes ICE related to function argument alignment with may_alias
tldr: Resolution for an ICE on aarch64 when handling function argument alignment with `may_alias` attribute.
author: Kyrylo Tkachov
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • aarch64
• compiler bug
• alignment
• ICE
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/b14ad46e6689cba2dd316bf677ad4f36278f9d3d
date: 2026-06-17T00:00:00.000Z

A compiler ice (Internal Compiler Error) on the aarch64 backend, related to function argument alignment when the may_alias attribute is used, has been fixed. The issue occurred because the compiler incorrectly retained user-specified alignment on types that were their own main variant due to may_alias. The fix ensures that user alignment is ignored, and the natural mode alignment is used, aligning behavior with AAPCS64 and Clang.