Landing: be7393903c28

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Project / Subsystem

gcc / reorg

Date

2026-09-16

Author

Yongqiang Tian

Commit

be7393903c28328a6d2dfd5bbd6347fcbf767bec

Source

github

Perf win

Breaking

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All attributes

project: gcc
subsystem: reorg
patch_id: —
commit_hash: be7393903c28328a6d2dfd5bbd6347fcbf767bec
source_type: github
headline: Do not charge debug instructions against search budget
tldr: Debug instructions no longer affect redundant instruction search budget.
author: Yongqiang Tian
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • optimization
• rtl
• debugging
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/be7393903c28328a6d2dfd5bbd6347fcbf767bec
date: 2026-09-16T00:00:00.000Z

This change prevents debug instructions from consuming the search budget when looking for redundant instructions. By skipping DEBUG_INSNs, the compiler ensures that these non-executing instructions do not mask actual redundancies, leading to more accurate optimization. A new test case for SPARC is included.