[RISCV][TTI] Add cost of typebased binary VP intrisic with functionalOPC

This patch add the instruction cost for type based binary VP intrinsic
instructions.
The cost of type based binary VP intrinsics will as same as their non-VP counterpart.

Author: ElvisWang123

llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp

@@ -959,6 +959,32 @@ RISCVTTIImpl::getIntrinsicInstrCost(const IntrinsicCostAttributes &ICA,
       return Cost * LT.first;
     break;
   }
+  // vp integer arithmetic ops.
+  case Intrinsic::vp_add:
+  case Intrinsic::vp_and:
+  case Intrinsic::vp_ashr:
+  case Intrinsic::vp_lshr:
+  case Intrinsic::vp_mul:
+  case Intrinsic::vp_or:
+  case Intrinsic::vp_sdiv:
+  case Intrinsic::vp_shl:
+  case Intrinsic::vp_srem:
+  case Intrinsic::vp_sub:
+  case Intrinsic::vp_udiv:
+  case Intrinsic::vp_urem:
+  case Intrinsic::vp_xor:
+  // vp float arithmetic ops.
+  case Intrinsic::vp_fadd:
+  case Intrinsic::vp_fsub:
+  case Intrinsic::vp_fmul:
+  case Intrinsic::vp_fdiv:
+  case Intrinsic::vp_frem: {
+    std::optional<unsigned> FOp =
+        VPIntrinsic::getFunctionalOpcodeForVP(ICA.getID());
+    if (FOp)
+      return getArithmeticInstrCost(*FOp, ICA.getReturnType(), CostKind);
+    break;
+  }
   }
 
   if (ST->hasVInstructions() && RetTy->isVectorTy()) {