Landing: eaf619a0f552

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Project / Subsystem

gcc / avr

Date

2026-05-28

Author

Georg-Johann Lay

Commit

eaf619a0f552d73068a06d959ea6a4b8a19ff674

Source

github

Perf win

Breaking

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All attributes

project: gcc
subsystem: avr
patch_id: —
commit_hash: eaf619a0f552d73068a06d959ea6a4b8a19ff674
source_type: github
headline: AVR: Supports [[len=<words>]] notes in inline asm to specify its size.
tldr: GCC now supports `[[len=<words>]]` notes in AVR inline assembly to specify the size of the assembly code.
author: Georg-Johann Lay
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • avr
• inline assembly
• optimization
• code generation
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/eaf619a0f552d73068a06d959ea6a4b8a19ff674
date: 2026-05-28T00:00:00.000Z

This commit adds support for [[len=<words>]] notes in AVR inline assembly constructs. This feature allows developers to specify the size of inline assembly code, which is essential for correct jump offset calculations and better code generation, especially when jumps cross assembly blocks. It is implemented in ADJUST_INSN_LENGTH.