WIP/RFC: Unify all our various IR data structures into one
Summary
This article discusses a WIP RFC to unify Julia's multiple internal IR data structures into a single extensible UnifiedIR. It explains the motivation, design goals, and architecture, including dialect awareness, region based IR, and cross-ecosystem integration with the base language and tooling. It frames UnifiedIR as a collaborative, open source effort to simplify compiler pipelines and enable broader ecosystem use.