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gerrit-public.fairphone.software / fp2-dev / platform / external / llvm / 2aa6b4c142091b0528848e6c8144e58739b78b30 / . / lib / Target / Mips / MipsMCInstLower.cpp
blob: 416f77632029c140b3b6efcb4f5e080244f3ebd6 [file] [log] [blame]
Akira Hatanaka17a2f8e2011-07-07 20:24:54 +0000[diff] [blame]1//===-- MipsMCInstLower.cpp - Convert Mips MachineInstr to MCInst ---------===//
2//
3// The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file contains code to lower Mips MachineInstrs to their corresponding
11// MCInst records.
12//
13//===----------------------------------------------------------------------===//
14
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"
25using namespace llvm;
26
27MipsMCInstLower::MipsMCInstLower(Mangler *mang, const MachineFunction &mf,
28 MipsAsmPrinter &asmprinter)
29 : Ctx(mf.getContext()), Mang(mang), AsmPrinter(asmprinter) {}
30
31MCOperand MipsMCInstLower::LowerSymbolOperand(const MachineOperand &MO,
32 MachineOperandType MOTy) const {
33 MipsMCSymbolRefExpr::VariantKind Kind;
34 const MCSymbol *Symbol;
35 int Offset = 0;
36
37 switch(MO.getTargetFlags()) {
38 case MipsII::MO_NO_FLAG: 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;
48 }
49
50 switch (MOTy) {
51 case MachineOperand::MO_MachineBasicBlock:
52 Symbol = MO.getMBB()->getSymbol();
53 break;
54
55 case MachineOperand::MO_GlobalAddress:
56 Symbol = Mang->getSymbol(MO.getGlobal());
57 break;
58
59 case MachineOperand::MO_BlockAddress:
60 Symbol = AsmPrinter.GetBlockAddressSymbol(MO.getBlockAddress());
61 break;
62
63 case MachineOperand::MO_ExternalSymbol:
64 Symbol = AsmPrinter.GetExternalSymbolSymbol(MO.getSymbolName());
65 break;
66
67 case MachineOperand::MO_JumpTableIndex:
68 Symbol = AsmPrinter.GetJTISymbol(MO.getIndex());
69 break;
70
71 case MachineOperand::MO_ConstantPoolIndex:
72 Symbol = AsmPrinter.GetCPISymbol(MO.getIndex());
73 if (MO.getOffset())
74 Offset = MO.getOffset();
75 break;
76
77 default:
78 llvm_unreachable("<unknown operand type>");
79 }
80
81 return MCOperand::CreateExpr(MipsMCSymbolRefExpr::Create(Kind, Symbol, Offset,
82 Ctx));
83}
84
85void MipsMCInstLower::Lower(const MachineInstr *MI, MCInst &OutMI) const {
86 OutMI.setOpcode(MI->getOpcode());
87
88 for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
89 const MachineOperand &MO = MI->getOperand(i);
90 MCOperand MCOp;
91 MachineOperandType MOTy = MO.getType();
92
93 switch (MOTy) {
94 default:
95 MI->dump();
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());
101 break;
102 case MachineOperand::MO_Immediate:
103 MCOp = MCOperand::CreateImm(MO.getImm());
104 break;
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);
112 break;
113 }
114
115 OutMI.addOperand(MCOp);
116 }
117}