[llvm] [RegAlloc][RISCV] Increase the spill weight by target factor (PR #113675)

[Matt Arsenault via llvm-commits]

================
@@ -803,6 +803,11 @@ RISCVRegisterInfo::getRegisterCostTableIndex(const MachineFunction &MF) const {
              : 0;
 }
 
+unsigned
+RISCVRegisterInfo::getSpillWeightFactor(const TargetRegisterClass *RC) const {
+  return getRegClassWeight(RC).RegWeight;
----------------
arsenm wrote:

Why does this need to be a virtual function if it's just reading a property out of the TargetRegisterClass 

https://github.com/llvm/llvm-project/pull/113675