Landing: 7ec6968058b3

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Project / Subsystem

gcc / rx

Date

2026-05-12

Author

Yoshinori Sato

Commit

7ec6968058b393882580b18d1268a83776fd7d8f

Source

github

Perf win

Yes

Breaking

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project: gcc
subsystem: rx
patch_id: —
commit_hash: 7ec6968058b393882580b18d1268a83776fd7d8f
source_type: github
headline: RX: Fix infinite-loop on LRA
tldr: The RX backend now avoids an infinite loop during LRA by correcting register class definitions and stack frame manipulation.
author: Yoshinori Sato
outcome: committed
performance_win: true
breaking_change: false
series_id: —
series_parts: []
tags: • rx
• lra
• register allocation
• backend
• bugfix
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/7ec6968058b393882580b18d1268a83776fd7d8f
date: 2026-05-12T00:00:00.000Z

The RX backend experienced an infinite loop during the LRA (Local Register Allocation) phase due to incorrect register class definitions. This commit fixes the issue by correcting the register class definitions and stack frame manipulation. The changes ensure that the correct code is generated even when the -mlra option is used, especially for double-word operations.