[llvm] [RISCV][TTI] Implement getAddressComputationCost() in RISCV TTI. (PR #149955)

[Craig Topper via llvm-commits]

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@@ -1503,6 +1503,18 @@ RISCVTTIImpl::getIntrinsicInstrCost(const IntrinsicCostAttributes &ICA,
 
   return BaseT::getIntrinsicInstrCost(ICA, CostKind);
 }
+InstructionCost RISCVTTIImpl::getAddressComputationCost(Type *Ty,
+                                                        ScalarEvolution *SE,
+                                                        const SCEV *Ptr) const {
+  // Address computations with vector type is for usually for index load/store
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topperc wrote:

```suggestion
  // Address computations with vector type are usually for indexed load/store
```

https://github.com/llvm/llvm-project/pull/149955