Landing: a1bff044b64e

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Project / Subsystem

gcc / dom

Date

2026-10-04

Author

Aldy Hernandez

Commit

a1bff044b64eb06bdf3d17dc92244f0cde735e8d

Source

github

Perf win

Breaking

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All attributes

project: gcc
subsystem: dom
patch_id: —
commit_hash: a1bff044b64eb06bdf3d17dc92244f0cde735e8d
source_type: github
headline: DOM: Stop deriving implied conditions in record_conditions
tldr: Removes redundant condition derivation in DOM analysis, relying on the ranger pass instead.
author: Aldy Hernandez
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • dom
• optimization
• ranger
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/a1bff044b64eb06bdf3d17dc92244f0cde735e8d
date: 2026-10-04T00:00:00.000Z

The record_conditions function within the DOM (Dominator Tree) analysis pass no longer derives implied conditions, as this functionality is now handled more effectively by the ranger pass. This change eliminates redundant computations and simplifies the DOM pass. Testing on various benchmarks, including C++ bootstrap files and Fortran LAPACK builds, showed no difference in generated assembly or test outcomes, indicating the removal is safe.