llvm-project/llvm/lib/Target/RISCV/RISCVMCInstLower.cpp

//===-- RISCVMCInstLower.cpp - Convert RISCV MachineInstr to an MCInst ------=//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains code to lower RISCV MachineInstrs to their corresponding
// MCInst records.
//
//===----------------------------------------------------------------------===//

#include "RISCV.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"

using namespace llvm;

void llvm::LowerRISCVMachineInstrToMCInst(const MachineInstr *MI,
                                          MCInst &OutMI) {
  OutMI.setOpcode(MI->getOpcode());

  for (const MachineOperand &MO : MI->operands()) {
    MCOperand MCOp;
    switch (MO.getType()) {
    default:
      report_fatal_error(
          "LowerRISCVMachineInstrToMCInst: unknown operand type");
    case MachineOperand::MO_Register:
      // Ignore all implicit register operands.
      if (MO.isImplicit())
        continue;
      MCOp = MCOperand::createReg(MO.getReg());
      break;
    case MachineOperand::MO_Immediate:
      MCOp = MCOperand::createImm(MO.getImm());
      break;
    }

    OutMI.addOperand(MCOp);
  }
}