[llvm] [RISCV][ISel] Use saturating fcvt.w.dyn for lrint i32 on rv64 (PR #214678)

[Craig Topper via llvm-commits]

topperc wrote:

How is i32 lrint used on RV64? lround is supported because flang used it, but flang doesn't use lrint. clang never uses i32 lrint because long is 64-bits.

https://github.com/llvm/llvm-project/pull/214678