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 
25 using namespace llvm;
26 
27 static 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 
35 static 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 
58 void 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