[llvm] [VP][RISCV] Introduce vp.splat and RISC-V. (PR #98731)

[Yeting Kuo via llvm-commits]

================
@@ -777,6 +777,13 @@ END_REGISTER_VP(experimental_vp_reverse, EXPERIMENTAL_VP_REVERSE)
 
 ///// } Shuffles
 
+// llvm.vp.splat(ptr,val,mask,vlen)
----------------
yetingk wrote:

Done.

https://github.com/llvm/llvm-project/pull/98731