Landing: 8a8a022c81b6

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Project / Subsystem

gcc / gcc/optimization

Date

2026-08-10

Author

Aldy Hernandez

Commit

8a8a022c81b6105f70f72dfe2dc7b368353b49e6

Source

github

Perf win

Breaking

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All attributes

project: gcc
subsystem: gcc/optimization
patch_id: —
commit_hash: 8a8a022c81b6105f70f72dfe2dc7b368353b49e6
source_type: github
headline: Add --param=dom-jump-threading to disable DOM jump threading
tldr: New compiler option allows disabling DOM jump threading for debugging.
author: Aldy Hernandez
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • optimization
• debugging
• gcc
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/8a8a022c81b6105f70f72dfe2dc7b368353b49e6
date: 2026-08-10T00:00:00.000Z

A new compiler parameter, —param=dom-jump-threading, has been introduced to selectively disable the jump threading optimization within the DOM (Dominator Tree) pass. This change facilitates debugging and isolation of issues by allowing developers to turn off this specific component of the DOM optimizer without affecting other DOM operations. It is intended to aid in the ongoing effort to untangle DOM’s threading mechanism from the rest of the pass.