1 //===-- MipsMCInstLower.cpp - Convert Mips MachineInstr to MCInst ---------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains code to lower Mips MachineInstrs to their corresponding
13 //===----------------------------------------------------------------------===//
15 #include "MipsMCInstLower.h"
16 #include "MipsAsmPrinter.h"
17 #include "MipsInstrInfo.h"
18 #include "MipsMCSymbolRefExpr.h"
19 #include "llvm/CodeGen/MachineFunction.h"
20 #include "llvm/CodeGen/MachineInstr.h"
21 #include "llvm/CodeGen/MachineOperand.h"
22 #include "llvm/MC/MCContext.h"
23 #include "llvm/MC/MCInst.h"
24 #include "llvm/Target/Mangler.h"
27 MipsMCInstLower::MipsMCInstLower(Mangler *mang, const MachineFunction &mf,
28 MipsAsmPrinter &asmprinter)
29 : Ctx(mf.getContext()), Mang(mang), AsmPrinter(asmprinter) {}
31 MCOperand MipsMCInstLower::LowerSymbolOperand(const MachineOperand &MO,
32 MachineOperandType MOTy) const {
33 MipsMCSymbolRefExpr::VariantKind Kind;
34 const MCSymbol *Symbol;
37 switch(MO.getTargetFlags()) {
38 default: Kind = MipsMCSymbolRefExpr::VK_Mips_None; break;
39 case MipsII::MO_GPREL: Kind = MipsMCSymbolRefExpr::VK_Mips_GPREL; break;
40 case MipsII::MO_GOT_CALL: Kind = MipsMCSymbolRefExpr::VK_Mips_GOT_CALL; break;
41 case MipsII::MO_GOT: Kind = MipsMCSymbolRefExpr::VK_Mips_GOT; break;
42 case MipsII::MO_ABS_HI: Kind = MipsMCSymbolRefExpr::VK_Mips_ABS_HI; break;
43 case MipsII::MO_ABS_LO: Kind = MipsMCSymbolRefExpr::VK_Mips_ABS_LO; break;
44 case MipsII::MO_TLSGD: Kind = MipsMCSymbolRefExpr::VK_Mips_TLSGD; break;
45 case MipsII::MO_GOTTPREL: Kind = MipsMCSymbolRefExpr::VK_Mips_GOTTPREL; break;
46 case MipsII::MO_TPREL_HI: Kind = MipsMCSymbolRefExpr::VK_Mips_TPREL_HI; break;
47 case MipsII::MO_TPREL_LO: Kind = MipsMCSymbolRefExpr::VK_Mips_TPREL_LO; break;
51 case MachineOperand::MO_MachineBasicBlock:
52 Symbol = MO.getMBB()->getSymbol();
55 case MachineOperand::MO_GlobalAddress:
56 Symbol = Mang->getSymbol(MO.getGlobal());
59 case MachineOperand::MO_BlockAddress:
60 Symbol = AsmPrinter.GetBlockAddressSymbol(MO.getBlockAddress());
63 case MachineOperand::MO_ExternalSymbol:
64 Symbol = AsmPrinter.GetExternalSymbolSymbol(MO.getSymbolName());
67 case MachineOperand::MO_JumpTableIndex:
68 Symbol = AsmPrinter.GetJTISymbol(MO.getIndex());
71 case MachineOperand::MO_ConstantPoolIndex:
72 Symbol = AsmPrinter.GetCPISymbol(MO.getIndex());
74 Offset = MO.getOffset();
78 llvm_unreachable("<unknown operand type>");
81 return MCOperand::CreateExpr(MipsMCSymbolRefExpr::Create(Kind, Symbol, Offset,
85 void MipsMCInstLower::Lower(const MachineInstr *MI, MCInst &OutMI) const {
86 OutMI.setOpcode(MI->getOpcode());
88 for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
89 const MachineOperand &MO = MI->getOperand(i);
91 MachineOperandType MOTy = MO.getType();
96 llvm_unreachable("unknown operand type");
97 case MachineOperand::MO_Register:
98 // Ignore all implicit register operands.
99 if (MO.isImplicit()) continue;
100 MCOp = MCOperand::CreateReg(MO.getReg());
102 case MachineOperand::MO_Immediate:
103 MCOp = MCOperand::CreateImm(MO.getImm());
105 case MachineOperand::MO_MachineBasicBlock:
106 case MachineOperand::MO_GlobalAddress:
107 case MachineOperand::MO_ExternalSymbol:
108 case MachineOperand::MO_JumpTableIndex:
109 case MachineOperand::MO_ConstantPoolIndex:
110 case MachineOperand::MO_BlockAddress:
111 MCOp = LowerSymbolOperand(MO, MOTy);
115 OutMI.addOperand(MCOp);