[compiler] HIR-based FlattenReactiveLoops
Pre the title, this implements an HIR-based version of FlattenReactiveLoops. Another step on the way to HIR-everywhere. ghstack-source-id: e1d166352df6b0725e4c4915a19445437916251f Pull Request resolved: https://github.com/facebook/react/pull/29838
J
Joe Savona committed
43c17d13efc0c356a89a9036f173680ba1c115d2
Parent: f7b871a