[llvm] [RISCV][GISEL] instruction-select for G_SPLAT_VECTOR (PR #111193)

[Tobias Stadler via llvm-commits]

tobias-stadler wrote:

Thanks for the explanation! If I correctly remember a short discussion at the EuroLLVM GISel round-table, the goal is to introduce generic opcodes for all generic LLVM intrinsics instead of using G_INTRINISC for them. So I guess we will eventually get a G_EXPERIMENTAL_VP_SPLAT anyways?

https://github.com/llvm/llvm-project/pull/111193