Landing: 96a3184a784f

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Project / Subsystem

gcc / AVR

Date

2026-08-29

Author

Georg-Johann Lay

Commit

96a3184a784fe96c19ca9b15866162a01045b9de

Source

github

Perf win

Breaking

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All attributes

project: gcc
subsystem: AVR
patch_id: —
commit_hash: 96a3184a784fe96c19ca9b15866162a01045b9de
source_type: github
headline: AVR: Add TImode to MPUSH iterator for vector(16) memory passing
tldr: AVR target now supports passing vector(16) in memory by adding TImode to MPUSH instruction selection.
author: Georg-Johann Lay
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • AVR
• target
• instruction selection
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/96a3184a784fe96c19ca9b15866162a01045b9de
date: 2026-08-29T00:00:00.000Z

This commit enhances the AVR target’s instruction selection for memory passing of vector(16) types. It adds TImode to the MPUSH mode iterator, which determines available push instructions. This fix, addressing PR 127098, resolves issues with expr.cc on STACK_GROWS_DOWNWARDS + POST_DEC push operations by providing the necessary instruction support.