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
26 using namespace llvm;
27
28
LowerSymbolOperand(const MachineInstr * MI,const MachineOperand & MO,AsmPrinter & AP)29 static 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(MO.getGlobal());
45 break;
46
47 case MachineOperand::MO_BlockAddress:
48 Symbol = AP.GetBlockAddressSymbol(MO.getBlockAddress());
49 break;
50
51 case MachineOperand::MO_ExternalSymbol:
52 Symbol = AP.GetExternalSymbolSymbol(MO.getSymbolName());
53 break;
54
55 case MachineOperand::MO_ConstantPoolIndex:
56 Symbol = AP.GetCPISymbol(MO.getIndex());
57 break;
58 }
59
60 const MCSymbolRefExpr *MCSym = MCSymbolRefExpr::create(Symbol,
61 AP.OutContext);
62 const SparcMCExpr *expr = SparcMCExpr::create(Kind, MCSym,
63 AP.OutContext);
64 return MCOperand::createExpr(expr);
65 }
66
LowerOperand(const MachineInstr * MI,const MachineOperand & MO,AsmPrinter & AP)67 static 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(MO.getReg());
76
77 case MachineOperand::MO_Immediate:
78 return MCOperand::createImm(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
LowerSparcMachineInstrToMCInst(const MachineInstr * MI,MCInst & OutMI,AsmPrinter & AP)93 void llvm::LowerSparcMachineInstrToMCInst(const MachineInstr *MI,
94 MCInst &OutMI,
95 AsmPrinter &AP)
96 {
97
98 OutMI.setOpcode(MI->getOpcode());
99
100 for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
101 const MachineOperand &MO = MI->getOperand(i);
102 MCOperand MCOp = LowerOperand(MI, MO, AP);
103
104 if (MCOp.isValid())
105 OutMI.addOperand(MCOp);
106 }
107 }
108