Landing: b2d032a987d9

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Project / Subsystem

gcc / gcc

Date

2026-08-20

Author

Andrew MacLeod

Commit

b2d032a987d965549027a53f56f81ef2579dda0e

Source

github

Perf win

Yes

Breaking

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All attributes

project: gcc
subsystem: gcc
patch_id: —
commit_hash: b2d032a987d965549027a53f56f81ef2579dda0e
source_type: github
headline: Improve dom_oracle::clear performance
tldr: Optimizes dom_oracle::clear by tracking relevant basic blocks.
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/b2d032a987d965549027a53f56f81ef2579dda0e
date: 2026-08-20T00:00:00.000Z

The performance of dom_oracle::clear has been improved by introducing a managed list of basic blocks that contain relations involving SSA names. Instead of traversing the entire control flow graph, clear now iterates only through these tracked blocks, significantly reducing the overhead for clearing dominance information.