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

[Elvis Wang via llvm-commits]

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@@ -1085,6 +1085,12 @@ InstructionCost RISCVTTIImpl::getGatherScatterOpCost(
     return BaseT::getGatherScatterOpCost(Opcode, DataTy, Ptr, VariableMask,
                                          Alignment, CostKind, I);
 
+  // Gather/Scatter instruction will need to calculate the address of each
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ElvisWang123 wrote:

Oh, yes. This should be implemented in `getAddressComputationCost()`. 

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