Landing: c04842359618

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Project / Subsystem

gcc / gccrs

Date

2026-08-02

Author

Lishin

Commit

c04842359618b7dd5b4dc86c62cde69e7020201d

Source

github

Perf win

Yes

Breaking

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All attributes

project: gcc
subsystem: gccrs
patch_id: —
commit_hash: c04842359618b7dd5b4dc86c62cde69e7020201d
source_type: github
headline: gccrs: Use BIR drop analysis in backend cleanup
tldr: gccrs uses BIR drop analysis to optimize backend cleanup by skipping drops for moved locals.
author: Lishin
outcome: committed
performance_win: true
breaking_change: false
series_id: —
series_parts: []
tags: • gccrs
• rust
• compiler
• optimization
• BIR
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/c04842359618b7dd5b4dc86c62cde69e7020201d
date: 2026-08-02T00:00:00.000Z

gccrs now integrates its Basic Intermediate Representation (BIR) drop analysis into the backend cleanup phase. This optimization allows the compiler to skip generating cleanup code for Drop operations on locals that have been moved, as they are no longer valid. Unaffected locals continue to use existing cleanup logic.