[RISCV] Implement RISCVRegisterInfo::getPointerRegClass

Fixes bug 43041

Differential Revision: https://reviews.llvm.org/D66752

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@370113 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/RISCV/RISCVRegisterInfo.h

@@ -52,6 +52,12 @@ struct RISCVRegisterInfo : public RISCVGenRegisterInfo {
   bool trackLivenessAfterRegAlloc(const MachineFunction &) const override {
     return true;
   }
+
+  const TargetRegisterClass *
+  getPointerRegClass(const MachineFunction &MF,
+                     unsigned Kind = 0) const override {
+    return &RISCV::GPRRegClass;
+  }
 };
 }