[llvm] [RISCV] Share ArgGPRs array between SelectionDAG and GISel. (PR #74152)

[Wang Pengcheng via llvm-commits]

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@@ -986,6 +986,9 @@ bool CC_RISCV_FastCC(const DataLayout &DL, RISCVABI::ABI ABI, unsigned ValNo,
 bool CC_RISCV_GHC(unsigned ValNo, MVT ValVT, MVT LocVT,
                   CCValAssign::LocInfo LocInfo, ISD::ArgFlagsTy ArgFlags,
                   CCState &State);
+
+ArrayRef<MCPhysReg> getArgGPRs();
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wangpc-pp wrote:

What about putting this function in `RISCVRegisterInfo.h/cpp`, no need to be a class method but a function in `RISCV` namespace.

https://github.com/llvm/llvm-project/pull/74152