Landing: 85bbf625a94d

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Project / Subsystem

gcc / gcc

Date

2026-08-20

Author

Andrew MacLeod

Commit

85bbf625a94d49d092272203e84b5f8485bd8687

Source

github

Perf win

Yes

Breaking

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All attributes

project: gcc
subsystem: gcc
patch_id: —
commit_hash: 85bbf625a94d49d092272203e84b5f8485bd8687
source_type: github
headline: Improve equiv_oracle::clear performance
tldr: Optimizes equiv_oracle::clear by tracking basic blocks with equivalences.
author: Andrew MacLeod
outcome: committed
performance_win: true
breaking_change: false
series_id: —
series_parts: []
tags: • optimization
• gcc
• performance
• compiler
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/85bbf625a94d49d092272203e84b5f8485bd8687
date: 2026-08-20T00:00:00.000Z

The equiv_oracle::clear method’s performance is enhanced by introducing a mechanism to track basic blocks containing equivalences for SSA names. Instead of re-processing all blocks, clear now focuses only on the necessary blocks, improving efficiency for equivalence tracking during optimization passes. This change is related to PR tree-optimization/126856.