1//===-- SparcMCInstLower.cpp - Convert Sparc 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 Sparc MachineInstrs to their corresponding
10// MCInst records.
11//
12//===----------------------------------------------------------------------===//
13
14#include "MCTargetDesc/SparcMCExpr.h"
15#include "Sparc.h"
16#include "llvm/CodeGen/AsmPrinter.h"
17#include "llvm/CodeGen/MachineFunction.h"
18#include "llvm/CodeGen/MachineInstr.h"
19#include "llvm/CodeGen/MachineOperand.h"
20#include "llvm/IR/Mangler.h"
21#include "llvm/MC/MCAsmInfo.h"
22#include "llvm/MC/MCContext.h"
23#include "llvm/MC/MCExpr.h"
24#include "llvm/MC/MCInst.h"
25
26using namespace llvm;
27
28
29static MCOperand LowerSymbolOperand(const MachineInstr *MI,
30 const MachineOperand &MO,
31 AsmPrinter &AP) {
32
33 SparcMCExpr::VariantKind Kind =
34 (SparcMCExpr::VariantKind)MO.getTargetFlags();
35 const MCSymbol *Symbol = nullptr;
36
37 switch(MO.getType()) {
38 default: llvm_unreachable("Unknown type in LowerSymbolOperand");
39 case MachineOperand::MO_MachineBasicBlock:
40 Symbol = MO.getMBB()->getSymbol();
41 break;
42
43 case MachineOperand::MO_GlobalAddress:
44 Symbol = AP.getSymbol(GV: MO.getGlobal());
45 break;
46
47 case MachineOperand::MO_BlockAddress:
48 Symbol = AP.GetBlockAddressSymbol(BA: MO.getBlockAddress());
49 break;
50
51 case MachineOperand::MO_ExternalSymbol:
52 Symbol = AP.GetExternalSymbolSymbol(Sym: MO.getSymbolName());
53 break;
54
55 case MachineOperand::MO_ConstantPoolIndex:
56 Symbol = AP.GetCPISymbol(CPID: MO.getIndex());
57 break;
58 }
59
60 const MCSymbolRefExpr *MCSym = MCSymbolRefExpr::create(Symbol,
61 Ctx&: AP.OutContext);
62 const SparcMCExpr *expr = SparcMCExpr::create(Kind, Expr: MCSym,
63 Ctx&: AP.OutContext);
64 return MCOperand::createExpr(Val: expr);
65}
66
67static MCOperand LowerOperand(const MachineInstr *MI,
68 const MachineOperand &MO,
69 AsmPrinter &AP) {
70 switch(MO.getType()) {
71 default: llvm_unreachable("unknown operand type"); break;
72 case MachineOperand::MO_Register:
73 if (MO.isImplicit())
74 break;
75 return MCOperand::createReg(Reg: MO.getReg());
76
77 case MachineOperand::MO_Immediate:
78 return MCOperand::createImm(Val: MO.getImm());
79
80 case MachineOperand::MO_MachineBasicBlock:
81 case MachineOperand::MO_GlobalAddress:
82 case MachineOperand::MO_BlockAddress:
83 case MachineOperand::MO_ExternalSymbol:
84 case MachineOperand::MO_ConstantPoolIndex:
85 return LowerSymbolOperand(MI, MO, AP);
86
87 case MachineOperand::MO_RegisterMask: break;
88
89 }
90 return MCOperand();
91}
92
93void llvm::LowerSparcMachineInstrToMCInst(const MachineInstr *MI,
94 MCInst &OutMI,
95 AsmPrinter &AP)
96{
97
98 OutMI.setOpcode(MI->getOpcode());
99
100 for (const MachineOperand &MO : MI->operands()) {
101 MCOperand MCOp = LowerOperand(MI, MO, AP);
102
103 if (MCOp.isValid())
104 OutMI.addOperand(Op: MCOp);
105 }
106}
107

source code of llvm/lib/Target/Sparc/SparcMCInstLower.cpp