[llvm] Verifier: forbid non-i32/i64 lrint, and non-i64 llrint (PR #70839)

[Ramkumar Ramachandra via llvm-commits]

artagnon wrote:

Moreover, as evident from the patch, there is no test coverage for non-i32/i64 llvm.lrint and non-i64 llvm.llrint in test/CodeGen for any target. If future contributors want to support these things, they can remove the Verifier check, and add test coverage along with their patch. As it currently stands, I'm convinced that we don't support these configurations in practice, even if the LangRef isn't explicit about this.

https://github.com/llvm/llvm-project/pull/70839