[llvm] [RISCV][TTI] Implement vector costs for `llvm.fpto{u|s}i.sat()`. (PR #143655)

[Elvis Wang via llvm-commits]

================
@@ -1541,6 +1541,32 @@ RISCVTTIImpl::getIntrinsicInstrCost(const IntrinsicCostAttributes &ICA,
                           cast<VectorType>(ICA.getArgTypes()[0]), {}, CostKind,
                           0, cast<VectorType>(ICA.getReturnType()));
   }
+  case Intrinsic::fptoui_sat:
+  case Intrinsic::fptosi_sat: {
+    InstructionCost Cost = 0;
+    bool IsSigned = ICA.getID() == Intrinsic::fptosi_sat;
+    Type *SrcTy = ICA.getArgTypes()[0];
+
+    auto SrcLT = getTypeLegalizationCost(SrcTy);
+    auto DstLT = getTypeLegalizationCost(RetTy);
+    if (!SrcTy->isVectorTy())
+      break;
+
+    if (!SrcLT.first.isValid() || !DstLT.first.isValid())
+      return InstructionCost::getInvalid();
+
+    Cost +=
+        getCastInstrCost(IsSigned ? Instruction::FPToSI : Instruction::FPToUI,
+                         RetTy, SrcTy, TTI::CastContextHint::None, CostKind);
+    if (IsSigned) {
----------------
ElvisWang123 wrote:

Yes, I used the really old version (which is wrong) to show the asm.  😢 
Updated, thanks!

https://github.com/llvm/llvm-project/pull/143655