[llvm] [SelectionDAG] Handle roundeven libcall in visitCall (PR #170690)

[Nikita Popov via llvm-commits]

nikic wrote:

I think it's reasonable to do the libcall -> intrinsic replacement *somewhere* in LLVM, but I agree that that place isn't SDAG. This is something that should be done by SLC and SLC only.

https://github.com/llvm/llvm-project/pull/170690