Landing: 079cbf59c511

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Project / Subsystem

gcc / ada

Date

2026-02-19

Author

Claire Dross

Commit

079cbf59c5110b290917d09935afec0d7fe29acc

Source

github

Perf win

Breaking

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All attributes

project: gcc
subsystem: ada
patch_id: —
commit_hash: 079cbf59c5110b290917d09935afec0d7fe29acc
source_type: github
headline: Disable inlining of subprograms with unchecked union parameters for GNATprove
tldr: The Ada compiler now prevents inlining of subprograms with unchecked union type formal parameters when compiling for GNATprove.
author: Claire Dross
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • ada
• gnatprove
• unchecked union
• inlining
• restrictions
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/079cbf59c5110b290917d09935afec0d7fe29acc
date: 2026-02-19T00:00:00.000Z

To ensure GNATprove’s reliability, the Ada compiler now restricts inlining when a formal parameter has an unchecked union type. Inlining such subprograms could lead to missed checks for Unchecked Union restrictions, potentially compromising GNATprove’s ability to verify code correctness. This change prevents those missed checks.