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

[Yeting Kuo via llvm-commits]

================
@@ -2211,10 +2213,14 @@ SDValue DAGTypeLegalizer::PromoteIntOp_INSERT_VECTOR_ELT(SDNode *N,
 }
 
 SDValue DAGTypeLegalizer::PromoteIntOp_ScalarOp(SDNode *N) {
+  SDValue Op = GetPromotedInteger(N->getOperand(0));
+  if (N->getOpcode() == ISD::EXPERIMENTAL_VP_SPLAT)
+    return DAG.getNode(ISD::EXPERIMENTAL_VP_SPLAT, SDLoc(N), N->getValueType(0),
----------------
yetingk wrote:

Done.

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