[llvm] [RFC] implement convergence control in MIR using SelectionDAG (PR #71785)

[Sameer Sahasrabuddhe via llvm-commits]

ssahasra wrote:

Also, forgot to mention that this is a very early RFC, hoping to attract attention to the general scheme of things. The code contains occasional debug code, and the implementation is incomplete (for example, SelectINTRINSIC_W_CHAIN is not implemented, and the LOOP intrinsic is not implemented).

https://github.com/llvm/llvm-project/pull/71785