1//===-- VEMCInstLower.cpp - Convert VE MachineInstr to MCInst -------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file contains code to lower VE MachineInstrs to their corresponding
10// MCInst records.
11//
12//===----------------------------------------------------------------------===//
13
14#include "VE.h"
15#include "llvm/CodeGen/AsmPrinter.h"
16#include "llvm/CodeGen/MachineFunction.h"
17#include "llvm/CodeGen/MachineInstr.h"
18#include "llvm/CodeGen/MachineOperand.h"
19#include "llvm/IR/Mangler.h"
20#include "llvm/MC/MCAsmInfo.h"
21#include "llvm/MC/MCContext.h"
22#include "llvm/MC/MCExpr.h"
23#include "llvm/MC/MCInst.h"
24
25using namespace llvm;
26
27static MCOperand LowerSymbolOperand(const MachineInstr *MI,
28                                    const MachineOperand &MO,
29                                    const MCSymbol *Symbol, AsmPrinter &AP) {
30
31  const MCSymbolRefExpr *MCSym = MCSymbolRefExpr::create(Symbol, AP.OutContext);
32  return MCOperand::createExpr(MCSym);
33}
34
35static MCOperand LowerOperand(const MachineInstr *MI, const MachineOperand &MO,
36                              AsmPrinter &AP) {
37  switch (MO.getType()) {
38  default:
39    report_fatal_error("unsupported operand type");
40
41  case MachineOperand::MO_Register:
42    if (MO.isImplicit())
43      break;
44    return MCOperand::createReg(MO.getReg());
45
46  case MachineOperand::MO_Immediate:
47    return MCOperand::createImm(MO.getImm());
48
49  case MachineOperand::MO_MachineBasicBlock:
50    return LowerSymbolOperand(MI, MO, MO.getMBB()->getSymbol(), AP);
51
52  case MachineOperand::MO_RegisterMask:
53    break;
54  }
55  return MCOperand();
56}
57
58void llvm::LowerVEMachineInstrToMCInst(const MachineInstr *MI, MCInst &OutMI,
59                                       AsmPrinter &AP) {
60  OutMI.setOpcode(MI->getOpcode());
61
62  for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
63    const MachineOperand &MO = MI->getOperand(i);
64    MCOperand MCOp = LowerOperand(MI, MO, AP);
65
66    if (MCOp.isValid())
67      OutMI.addOperand(MCOp);
68  }
69}
70