Landing: 649b2a6d9f9f

← All landings

Project / Subsystem

gcc / gcc

Date

2026-07-08

Author

Jeff Law

Commit

649b2a6d9f9f1a29f7f26199b7b3ebbaeef3c634

Source

github

Perf win

Breaking

View on GitHub →

All attributes

project: gcc
subsystem: gcc
patch_id: —
commit_hash: 649b2a6d9f9f1a29f7f26199b7b3ebbaeef3c634
source_type: github
headline: Fix dest = cond ? x : -1 when STORE_FLAG_VALUE is -1
tldr: Bug fix in GCC's if-conversion optimization corrects handling of conditional assignments to -1 when STORE_FLAG_VALUE is -1.
author: Jeff Law
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • optimization
• bugfix
• m68k
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/649b2a6d9f9f1a29f7f26199b7b3ebbaeef3c634
date: 2026-07-08T00:00:00.000Z

A bug in GCC’s ifcvt.cc pass, affecting conditional assignments of the form dest = cond ? x : -1, has been fixed. The issue occurred when STORE_FLAG_VALUE was set to -1, leading to incorrect tense handling in the generated code. This commit corrects the logic for platforms like m68k and gcn, ensuring accurate conditional assignments in such scenarios.