[llvm] [VP][RISCV] Introduce vp.lrint/llrint and RISC-V support. (PR #82627)

[Craig Topper via llvm-commits]

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topperc wrote:

The code in LegalizeVectorOps except to use the result type when it looks up the type action. We set it as custom for the FP types, but not the integer types. LRINT and LLRINT are in the IntVec section of the RISCVISelLowering.cpp because of this.

https://github.com/llvm/llvm-project/pull/82627