[RISCV] Make input/output args analyzing functions public

[wwei]

Summary

To support CallLowering for GlobalIsel, and reduce duplicated code as much as possible, we change the C++ access specifiers from private to public for analyzeInputArgs and analyzeOutputArgs functions. Thus, GlobalIsel can reuse these two functions to support call and return lowering.

[lenary]

Please can you merge this into D65219, given these changes are relevant to that patch? It's hard to know if these changes are "correct" without the context of that patch.

[wwei]

In D65218#1604143, @lenary wrote:

Please can you merge this into D65219, given these changes are relevant to that patch? It's hard to know if these changes are "correct" without the context of that patch.

@lenary I would close this patch, and the change in this patch will be merged into another patch about general calllowering support for GlobalIsel. (D65219 is an initial skeleton for GlobalISel, it should not have un-relevant code.)

[lenary]

In D65218#1604551, @wwei wrote:

In D65218#1604143, @lenary wrote:

Please can you merge this into D65219, given these changes are relevant to that patch? It's hard to know if these changes are "correct" without the context of that patch.

@lenary I would close this patch, and the change in this patch will be merged into another patch about general calllowering support for GlobalIsel. (D65219 is an initial skeleton for GlobalISel, it should not have un-relevant code.)

Ok, That sounds sensible :)

llvm/lib/Target/RISCV/RISCVISelLowering.h

   unsigned
   getExceptionSelectorRegister(const Constant *PersonalityFn) const override;
 
-private:
   void analyzeInputArgs(MachineFunction &MF, CCState &CCInfo,
                         const SmallVectorImpl<ISD::InputArg> &Ins,
                         bool IsRet) const;
   void analyzeOutputArgs(MachineFunction &MF, CCState &CCInfo,
                          const SmallVectorImpl<ISD::OutputArg> &Outs,
                          bool IsRet, CallLoweringInfo *CLI) const;
+
+private:
   // Lower incoming arguments, copy physregs into vregs
   SDValue LowerFormalArguments(SDValue Chain, CallingConv::ID CallConv,
                                bool IsVarArg,