[llvm] [RISCV][GISEL] Add vector RegisterBanks and vector support in getRegBankFromRegClass (PR #71541)

[Michael Maitland via llvm-commits]

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@@ -165,7 +165,7 @@ class AMDGPURegisterBankInfo final : public AMDGPUGenRegisterBankInfo {
   bool isDivergentRegBank(const RegisterBank *RB) const override;
 
   unsigned copyCost(const RegisterBank &A, const RegisterBank &B,
-                    unsigned Size) const override;
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michaelmaitland wrote:

I have them separated into their own commit. It is the first commit in the commit history of this Pr. I will commit it separate. 

https://github.com/llvm/llvm-project/pull/71541