Landing: 44ee83bcf7f1

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Project / Subsystem

gcc / gccrs

Date

2026-07-10

Author

Enes Cevik

Commit

44ee83bcf7f1a80d4be275932b771b1f7403863e

Source

github

Perf win

Breaking

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All attributes

project: gcc
subsystem: gccrs
patch_id: —
commit_hash: 44ee83bcf7f1a80d4be275932b771b1f7403863e
source_type: github
headline: GCC Rust frontend adds `assert_zero_valid` intrinsic stub
tldr: GCC's Rust frontend adds a stub for the `assert_zero_valid` intrinsic, which will be fully implemented with layout engine support.
author: Enes Cevik
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • gccrs
• rust
• intrinsic
• compiler
• zero-initialization
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/44ee83bcf7f1a80d4be275932b771b1f7403863e
date: 2026-07-10T00:00:00.000Z

GCC’s Rust frontend has introduced a stub for the assert_zero_valid intrinsic. This intrinsic is intended to check if a type can be safely zero-initialized, typically by using layout engine support to detect problematic types like references or NonNull types. Currently, the stub always returns the unit type (), with full implementation deferred until layout engine capabilities are integrated.