[llvm] [RISCV][XCV] Select element-wise XCVsimd ops from packed-vector IR (PR #205836)

[Luke Lau via llvm-commits]

https://github.com/lukel97 commented:

Does this need to be stacked upon the intrinsics PR? Can it be unstacked so it only contains the default SD node patterns?

https://github.com/llvm/llvm-project/pull/205836