We will be performing an update to the swift:main branch to support llvm-project:stable/21.x.
CI Dashboard: Swift rebranch [Jenkins]
For those supporting other platforms if you would like to test against the llvm-project:stable/21.x merge before it lands please check out the following branches:
swift
rebranch
llvm-project
stable/21.x
Update Checkout Scheme:
./utils/update-checkout --scheme rebranch
Automergers
Swift will have an automerger from main into rebranch to keep the branch in sync.
Branch Detail
The LLVM Project stable/21.x branch was created from next on July 15th, 2025, and aligns with the llvm/llvm-project:release/21.x branch.
We are planning to perform the merge in the Fall of 2025. I will provide a specific date once we are closer.
More details about Simplifying the apple/llvm-project branches and New branching scheme for swiftlang/llvm-project