[llvm] [TLI] Handle roundeven libcall in hasOptimizedCodegen (PR #170689)

[via llvm-commits]

valadaptive wrote:

I'm not sure how to add tests for this, since it seems to all be target-specific. I *did* add tests that cover this behavior as part of https://github.com/llvm/llvm-project/pull/170018.

https://github.com/llvm/llvm-project/pull/170689