[llvm] [RISCV][CostModel][NFC] Add getRISCVInstructionCost() to TTI for Cost… (PR #73651)

[Shih-Po Hung via llvm-commits]

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@@ -34,6 +34,63 @@ static cl::opt<unsigned> SLPMaxVF(
         "exclusively by SLP vectorizer."),
     cl::Hidden);
 
+InstructionCost
+RISCVTTIImpl::getRISCVInstructionCost(ArrayRef<unsigned> OpCodes, MVT VT,
+                                      TTI::TargetCostKind CostKind) {
+  size_t NumInstr = OpCodes.size();
+  if (CostKind == TTI::TCK_CodeSize)
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arcbbb wrote:

Yeah, I just forgot this.. I'll rename the title.

https://github.com/llvm/llvm-project/pull/73651