[RISCV] Remove unused function

[rogfer01]

Summary

This function is not virtual, it is private and it is not called anywhere. No regression is introduced by removing it.

I think we can safely remove it.

[asb]

Thanks, looks good to me. This function was rendered unused in rL330827.

[rogfer01]

Thanks for the review @asb

llvm/trunk/lib/Target/RISCV/RISCVISelLowering.h

SDValue LowerCall(TargetLowering::CallLoweringInfo &CLI,
                     SmallVectorImpl<SDValue> &InVals) const override;
   bool shouldConvertConstantLoadToIntImm(const APInt &Imm,
                                          Type *Ty) const override {
     return true;
   }
   SDValue lowerGlobalAddress(SDValue Op, SelectionDAG &DAG) const;
   SDValue lowerBlockAddress(SDValue Op, SelectionDAG &DAG) const;
   SDValue lowerConstantPool(SDValue Op, SelectionDAG &DAG) const;
-  SDValue lowerExternalSymbol(SDValue Op, SelectionDAG &DAG) const;
   SDValue lowerSELECT(SDValue Op, SelectionDAG &DAG) const;
   SDValue lowerVASTART(SDValue Op, SelectionDAG &DAG) const;
   SDValue LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const;
   SDValue LowerRETURNADDR(SDValue Op, SelectionDAG &DAG) const;
 
   bool IsEligibleForTailCallOptimization(CCState &CCInfo,
     CallLoweringInfo &CLI, MachineFunction &MF,
     const SmallVector<CCValAssign, 16> &ArgLocs) const;
 };
 }
 
 #endif

llvm/trunk/lib/Target/RISCV/RISCVISelLowering.cpp

if (!isPositionIndependent()) {
     SDValue MNLo =
         SDValue(DAG.getMachineNode(RISCV::ADDI, DL, Ty, MNHi, CPALo), 0);
     return MNLo;
   } else {
     report_fatal_error("Unable to lowerConstantPool");
   }
 }
 
-SDValue RISCVTargetLowering::lowerExternalSymbol(SDValue Op,
-                                                 SelectionDAG &DAG) const {
-  SDLoc DL(Op);
-  EVT Ty = Op.getValueType();
-  ExternalSymbolSDNode *N = cast<ExternalSymbolSDNode>(Op);
-  const char *Sym = N->getSymbol();
-
-  // TODO: should also handle gp-relative loads.
-
-  if (isPositionIndependent() || Subtarget.is64Bit())
-    report_fatal_error("Unable to lowerExternalSymbol");
-
-  SDValue GAHi = DAG.getTargetExternalSymbol(Sym, Ty, RISCVII::MO_HI);
-  SDValue GALo = DAG.getTargetExternalSymbol(Sym, Ty, RISCVII::MO_LO);
-  SDValue MNHi = SDValue(DAG.getMachineNode(RISCV::LUI, DL, Ty, GAHi), 0);
-  SDValue MNLo =
-    SDValue(DAG.getMachineNode(RISCV::ADDI, DL, Ty, MNHi, GALo), 0);
-  return MNLo;
-}
-
 SDValue RISCVTargetLowering::lowerSELECT(SDValue Op, SelectionDAG &DAG) const {
   SDValue CondV = Op.getOperand(0);
   SDValue TrueV = Op.getOperand(1);
   SDValue FalseV = Op.getOperand(2);
   SDLoc DL(Op);
   MVT XLenVT = Subtarget.getXLenVT();
 
   // If the result type is XLenVT and CondV is the output of a SETCC node