1 //===- HexagonMCInstLower.cpp - Convert Hexagon MachineInstr to an 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 Hexagon MachineInstrs to their corresponding
13 //===----------------------------------------------------------------------===//
16 #include "HexagonAsmPrinter.h"
17 #include "HexagonMachineFunctionInfo.h"
18 #include "MCTargetDesc/HexagonMCInstrInfo.h"
20 #include "llvm/CodeGen/MachineBasicBlock.h"
21 #include "llvm/IR/Constants.h"
22 #include "llvm/IR/Mangler.h"
23 #include "llvm/MC/MCContext.h"
24 #include "llvm/MC/MCExpr.h"
25 #include "llvm/MC/MCInst.h"
29 static MCOperand GetSymbolRef(const MachineOperand& MO, const MCSymbol* Symbol,
30 HexagonAsmPrinter& Printer) {
31 MCContext &MC = Printer.OutContext;
34 ME = MCSymbolRefExpr::create(Symbol, MCSymbolRefExpr::VK_None, MC);
36 if (!MO.isJTI() && MO.getOffset())
37 ME = MCBinaryExpr::createAdd(ME, MCConstantExpr::create(MO.getOffset(), MC),
40 return (MCOperand::createExpr(ME));
43 // Create an MCInst from a MachineInstr
44 void llvm::HexagonLowerToMC(MachineInstr const* MI, MCInst& MCB,
45 HexagonAsmPrinter& AP) {
46 if(MI->getOpcode() == Hexagon::ENDLOOP0){
47 HexagonMCInstrInfo::setInnerLoop(MCB);
50 if(MI->getOpcode() == Hexagon::ENDLOOP1){
51 HexagonMCInstrInfo::setOuterLoop(MCB);
54 MCInst* MCI = new (AP.OutContext) MCInst;
55 MCI->setOpcode(MI->getOpcode());
56 assert(MCI->getOpcode() == static_cast<unsigned>(MI->getOpcode()) &&
57 "MCI opcode should have been set on construction");
59 for (unsigned i = 0, e = MI->getNumOperands(); i < e; i++) {
60 const MachineOperand &MO = MI->getOperand(i);
63 switch (MO.getType()) {
66 llvm_unreachable("unknown operand type");
67 case MachineOperand::MO_Register:
68 // Ignore all implicit register operands.
69 if (MO.isImplicit()) continue;
70 MCO = MCOperand::createReg(MO.getReg());
72 case MachineOperand::MO_FPImmediate: {
73 APFloat Val = MO.getFPImm()->getValueAPF();
74 // FP immediates are used only when setting GPRs, so they may be dealt
75 // with like regular immediates from this point on.
76 MCO = MCOperand::createImm(*Val.bitcastToAPInt().getRawData());
79 case MachineOperand::MO_Immediate:
80 MCO = MCOperand::createImm(MO.getImm());
82 case MachineOperand::MO_MachineBasicBlock:
83 MCO = MCOperand::createExpr
84 (MCSymbolRefExpr::create(MO.getMBB()->getSymbol(),
87 case MachineOperand::MO_GlobalAddress:
88 MCO = GetSymbolRef(MO, AP.getSymbol(MO.getGlobal()), AP);
90 case MachineOperand::MO_ExternalSymbol:
91 MCO = GetSymbolRef(MO, AP.GetExternalSymbolSymbol(MO.getSymbolName()),
94 case MachineOperand::MO_JumpTableIndex:
95 MCO = GetSymbolRef(MO, AP.GetJTISymbol(MO.getIndex()), AP);
97 case MachineOperand::MO_ConstantPoolIndex:
98 MCO = GetSymbolRef(MO, AP.GetCPISymbol(MO.getIndex()), AP);
100 case MachineOperand::MO_BlockAddress:
101 MCO = GetSymbolRef(MO, AP.GetBlockAddressSymbol(MO.getBlockAddress()),AP);
105 MCI->addOperand(MCO);
107 MCB.addOperand(MCOperand::createInst(MCI));