[Mlir-commits] [mlir] [mlir][arith] Add `arith.fptofp` op (PR #188041)

[Renato Golin]

rengolin wrote:

> I would really want a concrete plan to remove extf/truncf before merging this, that seems like a blocker to me.

We seem to have agreement with the idea of handling as aliases, like the matmul ops:
https://discourse.llvm.org/t/arith-fptofp-vs-arith-extf-arith-truncf/90276/10
https://discourse.llvm.org/t/arith-fptofp-vs-arith-extf-arith-truncf/90276/2

My main concern is how this will affect downstreams. Last time it took IREE about a month or two to get it sorted, which is a bit too much to push on this PR. 

If we all agree that's the plan, then we can merge this now and soon put up the new deprecation + alias PR and that can wait until everyone is ready.

https://github.com/llvm/llvm-project/pull/188041