Landing: fed7299b89f6

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Project / Subsystem

gcc / gcc/pru

Date

2026-03-25

Author

Dimitar Dimitrov

Commit

fed7299b89f62b64bd3433faace4eb5bb69fc3ef

Source

github

Perf win

Breaking

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All attributes

project: gcc
subsystem: gcc/pru
patch_id: —
commit_hash: fed7299b89f62b64bd3433faace4eb5bb69fc3ef
source_type: github
headline: pru: Transform patterns to use hard register constraints
tldr: Refactors PRU backend to use hard register constraints, simplifying register class definitions.
author: Dimitar Dimitrov
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • pru
• register allocation
• refactor
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/fed7299b89f62b64bd3433faace4eb5bb69fc3ef
date: 2026-03-25T00:00:00.000Z

The PRU backend now uses hard register constraints, which simplifies register class definitions by removing single-register classes. Predicates are updated to directly compare register numbers, and the mulsi3 and umulsidi3 patterns have been updated to use the new constraints, yielding cleaner code.