Landing: 1a59bc13e2ca

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Project / Subsystem

gcc / sh

Date

2026-07-03

Author

Oleg Endo

Commit

1a59bc13e2ca584b16059306d780d6f95156be93

Source

github

Perf win

Breaking

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All attributes

project: gcc
subsystem: sh
patch_id: —
commit_hash: 1a59bc13e2ca584b16059306d780d6f95156be93
source_type: github
headline: SH: Fix T bit set expressions of addc and subc insns.
tldr: Corrects the T bit handling for `addc` and `subc` instructions on the SH architecture.
author: Oleg Endo
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • sh
• bugfix
• condition-codes
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/1a59bc13e2ca584b16059306d780d6f95156be93
date: 2026-07-03T00:00:00.000Z

This commit fixes issues related to the T (result sign) bit in the instruction set for the SH architecture, specifically for the addc (add with carry) and subc (subtract with carry) instructions. The associated machine description patterns have been updated to correctly set or use the T bit, resolving bugs reported in PR target/67459 and PR target/122948. A new test case is included to verify the fix.